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SpectraView II - User's Guide

1. LAN P C RS232 OUT D 1 RS232 OUT D 2 RS232 IP 192 168 0 255 IP 192 168 0 1 Display 3 Display 4 RS232 IN RS232 IN el ID 3 ID 4 RS232 RS232 The following image shows how this layout looks in the Summary window when configured Notice that all of the displays are configured in the software to use the LAN IP address 192 168 0 1 even though displays 2 3 and 4 are connected together via RS232 Connection Summary Port ID Model S N Status 1 192 168 0 1 1 Not verified 2 192 158 0 1 2 Not verified E 192 168 0 1 3 Not verified 4 192 168 0 1 4 Not verified aaa NEC DISPLAY WALL CALIBRATOR USER S GUIDE 19 Multi IP LAN In this example the host PC and each display is connected via a LAN HUB Each display has a unique IP address and is configured to use LAN as the EXTERNAL CONTROL on the OSD The software is configured with the IP address and MONITOR ID of each display The ID of each display does not need to be unique since the displays are not daisy chained however the ID set on the OSD must match that set in the software Display 1 Display 2 PC ID 1 ID 1 IP 192 168 0 255 IP 192 168 0 1 IP 192 168 0 2 Display 3 Display 4 D1 D 1 IP 192 168 0 3 IP 192 168 0 4 The following image shows how this layout looks in the Summary window when configured Connection Summary Fort ID Model S N Status 1 192 168 0
2. USER S GUIDE 55 Contrast Ratio The ratio of the white luminance Intensity and black luminance Black Level of the display Correlated Color Temperature The closest matching color expressed in Kelvin of a white point that does not lie exactly on the blackbody locus D IIluminants CIE Daylight Standard IIluminants based on approximating daylight The subscript denotes the correlated color temperature of the illuminant For example D50 has a correlated color temperature of 5000K Delta E A E A measurement of how different two colors are to each other In NEC Display Wall Calibrator Delta E values are derived by calculating the distance between two colors in Lab color space using the CIE 94 formula A Delta E value of 1 indicates a just perceptual dif ference between two colors Delta uv A uv A measure of how different two colors are irrespective of luminance In NEC Display Wall Calibrator Delta uv values are used to indicate how far a white point is from the blackbody locus CIE uv color space is used instead of CIE xy because it is more perceptually uniform or linear Device Gamut The range of colors that a device can produce DICOM Digital Imaging and Communications in Medicine Foot Lamberts fL A unit of luminance One foot Lambert is equal to 1 Candela per meter squared divided by 10 76 T approximately 3 43 Gamma The relationship between the input video signal to a display monitor and
3. and calibration data can be saved as a project file for later reference re calibration etc e Multiple Calibration Sets Different display monitor calibration projects can be uploaded to each group of displays allowing quick and easy switching between different calibration settings without the need to re calibrate each display e Informative A Summary window shows the results of the calibration and the measurement data This allows for detailed logging and reporting of the calibration procedure e Flexible NEC Display Wall Calibrator provides many features and options that make it flexible enough to be used in a large variety of video applications including on set use in TV studios and full DICOM support for medical imaging e Colorimeter function The software features a Colorimeter function which allows direct measurements to be taken by the color sensor and the results displayed in a variety of different formats e Scalable Video wall sizes from a 1x1 single display to a 10x10 are supported 10 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Calibration Overview Introduction to display monitor calibration The screen image on color LCD displays is created by emitting white light from a backlight source such as cold cathode fluorescent lamps CCFLs and then passing it through individual sub pixels with red green and blue filters which form each pixel on the screen The amount of light that is allowed to pass through ea
4. of monitor individual component tolerances usage and age of the display Intensity can be measured and specified in units of either Candelas cd m or Foot Lamberts fL within the application The NEC Display Wall Calibrator system supports 3 different methods of Intensity adjustment e Maximum Possible Matching Calibrates all of the displays to the maximum possible luminance that can achieve a match in both Intensity and White Point Use this option if it is desired that all of the displays match in both color and brightness All of the displays will only be as bright as the dimmest display e Maximum Possible Per Display Calibrates all of the displays to the maximum possible luminance that each individual display can achieve while matching up the white points on each display Use this option if it is desired that all of the displays match in color but is not important if they match each other in luminance e Specific Level Calibrates all of the displays to a specified target value of luminance while matching the white points on all displays If a display can not achieve the specified value it will be calibrated to the closest possible Intensity and a warning icon will be displayed after the calibration process is completed Use this option if the particular application requires a specific luminance but keep in mind that each display must actually be capable of achieving that value The difference between Maximum Possible Matchin
5. 1 1 Not verified 2 192 168 0 2 1 Not verified 3 192 168 0 3 1 Not verified 4 192 168 0 4 1 Not verified 20 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Wireless multi IP LAN with daisy chained RS232 In this example the host PC is connected to a LAN via a wireless connection Display 1 and Display 3 are connected to the LAN have unique IP addresses and are configured to use the LAN on the EXTERNAL CONTROL setting on the OSD Other displays are daisy chained from the two displays connected to the LAN Each display on a daisy chain has a unique ID assigned and is configured to use RS232 on the EXTERNAL CONTROL setting on the OSD Since communications to Display 2 is routed through Display 1 the software is configured to so that Display 2 uses the IP address of Display 1 even though Display 2 is configured to use RS232 on the OSD Likewise the software is configured so that Display 4 uses the IP address of Display 3 Display 1 Display 2 ID 1 ID2 RS232 PC Lan IP 192 168 0 255 RS232 OUT IP 192 168 0 1 F Display 3 Display 4 WIRELESS ID 1 ID 2 LAN ROUTER LAN RS232 IP 192 168 0 2 The following image shows how this layout looks in the Summary window when configured Notice that Display 2 is configured in the software to use the LAN IP address 192 168 0 1 of Display 1 even though it is connected to Display 1 via RS232 Likewise Display 4 is configured in the software to use
6. by creating a text file with a list of numerical values The text file must conform to the following specifications e Must contain between 3 and 256 values e Each value must be on a separate line e The first value must be 0 e Values must be monotonically increasing When imported the values will be automatically scaled and interpolated to create a Target curve NEC DISPLAY WALL CALIBRATOR USER S GUIDE 31 Custom White Point dialog E Custom White Point white Point Black Body K O 0001 Auy CIE Coordinates x The Custom White Point dialog is accessed by clicking the Edit button in the White Point section of the Edit Calibration Target dialog A custom White Point can be created by either specifying it as a Black Body radiator temperature in Kelvin as CIE xy chromaticity Coordinates or by taking a measurement Values between 2500K and 10000K may be entered in the Black Body K field The corresponding CIE xy coordinates are automatically calculated and displayed for reference CIE xy chromaticity coordinates can be entered by selecting the CIE Coordinates radio button and entering the x and y values The corresponding correlated black body radiator temperature and Auv Delta uv values are automatically calculated and displayed for reference The Delta uv value indicates how far the xy coordinates entered are from the black body radiator locus A custom White Point may be measured using the calibration se
7. can be calculated Gamma E Monitor ative Gamma Gamma Curve value 2 20 DICOM Curve Custom Curve Edit The Edit Edit Calibration Target dialog is accessed by clicking the Edit button on the Calibration Target panel in the main NEC Display Wall Calibrator window or by selecting Target from the Edit menu The Target defines the parameters for the calibration process and determines the color characteristics for calibrating each display Changing the Target settings after calibrating the displays will normally mean they will all need to be re calibrated to the new settings Intensity The Intensity selects the luminance or brightness of white for the calibration Options are e Maximum Possible Matching Calibrates all of the displays to the maximum possible luminance that can achieve a match in both Intensity and White Point Use this option if you want all of the displays to match in both color and brightness All of the displays will only be as bright as the dimmest display e Maximum Possible Per Display Calibrates all of the displays to the maximum possible luminance that each individual display can achieve and matches the white points on all displays Use this option if you want all of the displays to match in color but are not concerned if they match each other in luminance e Specific Level Calibrates all of the displays to a specified target value of luminance and also matches the whi
8. gain and bias levels Apply to Selected Display COM3ID1 All Displays The Input tab is used to set and report the current video input selected on the display When Single Display is selected the Video Input list shows the current video input being used by the display The video input can be changed by selecting the desired input from the list When All Displays is selected the Video Input list does not show the current video input The video input can be changed for all of the displays in the project by selecting the desired input from the list and clicking the Update button The Video tab is used to perform analog video signal adjustment The controls are only available when analog video inputs such as VGA RGB HV and Option Analog It is not necessary to re calibrate the displays after performing these operations Analog Auto Setup will measure the incoming analog video signal and automatically set the video level controls in the display as well as the size and position of the video This operation should be performed whenever a new analog video signal is connected when a major change is made to the video wiring to the display or when a video amplifier or splitter is added to the video link Note It is essential that when this operation is performed a video Signal that contains both pure black and pure white is being input White video should extend to each edge of the active video area otherwise the control
9. increasing the black level as necessary For most applications the highest possible Contrast Ratio is most suitable and can be achieved by selecting Monitor Default as the Contrast Ratio Specific Contrast Ratios in the range 50 1 to 500 1 can be selected Note If the selected contrast ratio is higher than what the display is actually capable of achieving then the display will calibrate to the highest possible contrast ratio For example if 500 1 is selected but the display is only capable of say 320 1 with the current Target settings then the resulting calibration will have a contrast ratio of 320 1 Calibration Steps The display calibration process for a video wall when matching both the Intensity and White Point is outlined in the following steps 1 Initialize Displays This step resets each display to the default color settings so that the native performance of each display can be measured before the calibration Settings such as the Brightness Color mode Con trast etc will be reset 2 Measuring Displays During this step all displays are measured to determine the default native color char acteristics of each display This step involves placing the color sensor on the screen while various test patterns are displayed and measured This step repeated for all displays in the video wall 3 Target Calculation Once all of the displays have been measured the software will automatically calculate the maximum possible
10. or down to the next row For very large video walls for example larger than a 5x5 it may be more efficient to split the calibration into two separate projects and divide the wall into two However keep in mind that depending on the calibration Target type being used it may be necessary to measure all of the displays in the video wall in order to determine the dimmest display The physical wiring connection order between displays does not dictate the order in which the displays are measured and calibrated since MONITOR IDs and IP addresses can be configured for each display Configuring Connections Displays can be connected to the host PC via either RS232 or LAN in several different configurations A wireless LAN connection can also be used from the host PC if using a wireless access point or router Keep in mind the following points when configuring and connecting displays e If using RS232 to connect displays using a daisy chain each display on the chain must have a unique Monitor ID set on the display s OSD e If using RS232 displays should be connected using an RS232 serial NULL modem cable e The RS232 connection from the host PC should connect to the RS232 IN on the first display e The RS232 OUT of a display should connect to the RS232 IN on the next display in the daisy chain e If using LAN to connect to one or more displays make sure that the IP address of each display is set correctly and that each display has a unique I
11. the color characteristics closely match thereby creating the visual illusion of a single large display In order to accomplish this the color characteristics of each display must be individually measured and compared to all of the other displays in the video wall The optimal settings for each display can then be calculated so that all the displays will match after calibration Since each display will vary in both color and intensity brightness due to aging individual components and tolerances it is necessary to find the lowest common denominator that all of the displays are capable of collectively achieving In other words the video wall can only be as bright as the dimmest individual display The color characteristics of each display are measured using a color sensor which is connected via USB to a host PC The sensor is placed on the screen and a series of test patterns is generated and measured This process is repeated for all displays The host PC does not have to supply any type of video signal to the displays in the video wall as test patterns are automatically generated within in each display Communications with each display from the host PC are performed via either RS232 or LAN Ethernet Once all of the displays have been measured the calibration Target can be calculated This Target defines the various calibration parameters such as the white point color of pure white on the screen intensity brightness gamma etc Ea
12. the screen output luminance Typically the screen luminance follows a mathematical power function of the input video signal the exponent of which is called the gamma Gamut The range of colors that can be reproduced on a particular device such as a monitor or printer or that can be distinguished by a sensing device such as a scanner or the human eye Hue The basic attribute of color such as red green yellow blue or purple Intensity Intensity specifies the luminance or brightness of white when displayed on the screen IP Internet Protocol Kelvin An absolute temperature scale denoted by K Zero Kelvin OK is equivalent to 273 Celsius Lab See CIE Lab LAN Local Area Network LCD Liquid Crystal Display Luminance A measure of the brightness or intensity of light usually expressed in units of Candelas per meter squared cd m or foot Lamberts Look Up Table LUT A table used to translate input values to output values NEC Display Wall Calibrator displays use 10 bit internal LUTs to apply Gamma corrections and Tone Re sponse Curves 56 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Native state Without any kind of correction or calibration applied Nit A unit of luminance equal to Candelas per meter squared cd m7 OSD On Screen Display RS232 Recommended Standard 232 is a standard for serial binary data signals Saturation An expression of the amount a color
13. the screens Reset panel Reset Measurement Data Reset Calibration Data Restore Calibration Settings Apply to Selected display All displays NEC DISPLAY WALL CALIBRATOR USER S GUIDE 39 This panel is used to reset and restore measurements and settings Reset Measurement Data Will clear all of the measurements taken during the Measurement phase of the calibration Reset Calibration Data Will clear all of the calibration data including measurements and adjustment settings It will not reset any settings in the displays Restore Calibration Settings Will re configure displays with the settings from the last calibration This can be useful to switch between different calibrations by loading different projects and restoring the calibration data to all of the displays Since the calibration settings are stored as part of the Project files entire wall calibrations can be restored as necessary by loading a Project file and using this function to restore the calibration settings to the displays These functions can either be applied to the selected display or all displays by selecting the appropriate setting in Apply to 40 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Display Measurements panel Display Measurements Uncalibrated Calibrated Intensity 503 9 cdim white Point 0 312 0 329 This panel shows the measured White Point values from the color sensor taken during the Me
14. there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e Reorient or relocate receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected e Consult the dealer or an experienced radio TV technician for help This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions e This device may not cause harmful interference e This device must accept any interference received including interference that may cause undesired operation NEC DISPLAY WALL CALIBRATOR USER S GUIDE 4 Contents Precautions 6 Note 6 Supported Display Monitors T System Requirements T 1 Introduction to NEC aray Wall Calibrator 8 Overview e 8 Main Features and benefits 9 Introduction to display monitor calibration 10 About Calibration Targets 10 2 Calibration Overview 10 Intensity 2 eee ee A White Point ww t2 Gamma and Tone Response Curves TRC a a IZ Contrast Ratio 5 2 e amp we ee 2 we o 13 Calibration Steps 2 18 Calibration Projects we we 14
15. 9 Set to system date amp time Set ko custom date amp time Apply to Selected Display COM3 ID 1 v All Displays The Power tab controls the power of the displays Clicking the On button will turn the display or displays on Clicking the Off button will turn the display or displays off When Single Display is selected the current power state of the display is shown The Clock tab is used to set and report the internal real time clock in the display The internal clock can be set to the host PC s system date and time by clicking the Set to system date amp time button When Single Display is selected a custom time and date can be set in the display by modifying the Time and Date fields and clicking the Set to custom date amp time button When a single display is selected using Single Display the current time and date of the clock in the display is shown 42 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Display Settings dialog Input tab 0 Display Settings Power Clock Input Video Calibration Status video Input Tuner 2 DTV Update Apply to Selected Display COMs ID 1 All Displays i Display Settings Power Clock Input video Calibration Status Automatically sets the analog video signal levels and Analog 4uto setup ae adjusts the video position and size Analog Auto Bias Gain Setup Automatically sets the analog video signal
16. Analog Video Inputs Important Notice ow ew ww 14 3 Planning and agung a Wall asi 15 Planning ok s Configuring Connections a E 4 Daisy chained RS232 with one COM port x a 16 Single IP LAN with daisy chained RS232 18 Multi IP LAN 19 Wireless multi IP LAN with daisy chained RS232 20 Configuring a Layout with the A Wizard 21 Calibration Times a 220 Video Inputs 25 4 Dialogs Settings and Menus 26 Main NEC Display Wall Calibrator window 26 Edit Calibration Target Configuration ae a 28 Custom Gamma Curve dialog s w g 90 Custom White Point dialog 31 Preferences dialog 3S wg Preferences dialog Calibration Sensor tab be amp we Oe Preferences dialog Calibration tab 33 Preferences dialog Interface tab 34 Panels 2 2 4 amp uw we amp RES SE wo GOO Actions panel 2 2 9385 Connection panel 36 Calibration Target panel 36 Colorimeter panel 37 Test Pattern panel 2 2 2 38 Reset panel 84 amp we ee e HOU Display Measurements panel ca a os os amp 40 Display Settings dialog toe ee ew DAT Display Settings dialog Power tab tow ee ww AT 8 Display Settings dialog Clock tab Display Settings dialog Input tab Display Settings dialog Video tab Display Settings dialog Calibration tab Displa
17. Intensity that will give a color match with all the displays This is done by determining the dimmest display in the video wall at the chosen White Point 4 Calibrating Displays Once the Target has been calculated all of the displays can be calibrated This step involves placing the color sensor on the screen while various test patterns are displayed and the display is adjusted This step repeated for all displays in the video wall Note When calibrating to a Target that uses either Maximum Possible Per Display or Specific Level option for the Intensity steps 1 and 2 are optional because it is not necessary to measure and calculate the matching Target value However if Specific Level is used performing steps 1 and 2 will allow the software to verify that each display is capable of achieving the specified Intensity value at the selected White Point If a display can not achieve this then a yellow warning icon is shown in both the Summary window and in the main display window for that particular display 14 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Calibration Projects The NEC Display Wall Calibrator application uses Project files to store the following information and settings e Layouts including all of the connection settings and video wall size information e Measurements for each display including the time each measurement was taken e Calibration results for each display including the final color characteristics of each displ
18. N because all communications from the host PC will go through the LAN address of Display 1 Also note that each display has been assigned a sequential MONITOR ID The display OSD setting for EXTERNAL CONTROL is set to RS232 for Displays 2 6 and LAN for Display 1 NEC DISPLAY WALL CALIBRATOR USER S GUIDE 25 Calibration Times Once the displays have been connected and configured and the layout has been configured and verified in the software the time taken to calibrate the video wall will depend on the number of displays and some of the Target parameters and Preference settings It will typically take about 30 seconds to measure each display Once measured the calibration process should take about 2 minutes per display however this can take longer if e More than the default 16 number of Grayscale Calibration steps is selected in the Preferences e The Extended Intensity stabilization time option in the Preferences is selected Note If the Intensity setting in the current Calibration Target is set to Maximum Possible Per Display it is not necessary to perform the Measurement steps This is because each display will be calibrated to the maximum possible Intensity that it can achieve and only the white point will match with the other displays So it is not necessary to first measure all of the displays in order to calculate which is the dimmest display Likewise if Specific Level is being used for the Intensity setting of the current Ca
19. N LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SOME STATES DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES OR THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES SO THE ABOVE EXCLUSIONS OR LIMITATIONS MAY NOT APPLY TO YOU This Product is warranted in accordance with the terms of this limited warranty Consumers are cautioned that Product performance is affected by system configuration software the application customer data and operator control of the system among other factors While NEC DISPLAY SOLUTIONS Products are considered to be compatible with many systems specific functional implementation by the customers of the Product may vary Therefore suitability of a Product for a specific purpose or application must be determined by consumer and is not warranted by NEC DISPLAY SOLUTIONS Federal Communications Commission FCC Notice U S A Only WARNING This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However
20. P address set using a web browser Also make sure that the displays are on the same subnet as the host PC being used Examples of various connection configurations are shown on the following pages 16 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Daisy chained RS232 with one COM port In this example the host PC has one RS232 COM port and all displays are daisy chained together Each display must have a unique MONITOR ID since they are all on the same daisy chain The RS232 OUT on the first display is connected to the RS232 IN on the next etc Display 1 Display 2 P COM RS232 IN RS232 IN RS232 OUT D 1 RS232 OUT D 2 RS232 RS232 Display 3 Display 4 ID 3 RS232 OUT ID 4 RS232 RS232 Note The cable connections between displays does not need to follow the same ordering as the ID assignments In this example the daisy chain is connected in order 1 2 4 3 The following image shows how this layout looks in the Summary window when configured Notice that all displays are configured to use the same COM port even though only the first display is actually connected to the host PC Connection Summary Port ID Model S N Status 1 COM1 1 Not verified 27 COMI 7 Not verified 3 COM1 3 Not verified 4 COM1 4 Not verified NEC DISPLAY WALL CALIBRATOR USER S GUIDE 17 Daisy chained RS232 with multiple COM ports In this example the host PC has two RS232 COM ports and there are two separate daisy c
21. Version NEC Display Wai Calibrator User s Guide 2 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Software Updates Occasionally updates and enhancements to the NEC Display Wall Calibrator software will be made available Visit the NEC Display Wall Calibrator section of the NEC DISPLAY SOLUTIONS web site to check for availability or use the Check for updates feature in the software to automatically see if a newer version is available NEC DISPLAY SOLUTIONS welcomes feedback and suggestions for product improvements Please use the feedback from on the NEC Display Wall Calibrator section of the NEC DISPLAY SOLUTIONS web site Technical Support and Feedback For technical support with the NEC Display Wall Calibrator product please visit the NEC Display Wall Calibrator section of the NEC DISPLAY SOLUTIONS web site and check for any Frequently Asked Questions that may help to solve the issue An online feedback form is available for submitting questions and feedback Trademarks and Copyright Microsoft and Windows are either registered trademarks or trademarks of Microsoft Corporation in the United States and or other countries Apple Macintosh Mac and the Mac logo are trademarks of Apple Computer Inc registered in the U S and other countries Copyright 2009 NEC Display Solutions Ltd The content of this manual is furnished for informational use only is subject to change without notice and should not be construe
22. White Point Shows the native white point of the display when un calibrated Uncalibrated Contrast Ratio Shows the native contrast ratio of the display when un calibrated Maximum Calibrated Intensity Shows the calculated maximum Intensity that can be achieved by the display using the current Target White Point setting If the current Target Intensity method is set to Specific Level and the calculated value is more than 5 lower than the Target then a yellow warning icon is shown to warn that the displays may not match in Intensity after calibration using the current Specific Level value and a lower value should be chosen Date Measured Shows the date and time that the un calibrated measurements were taken Operating Hours when Measured Shows the number of hours the display has been in operation at the time the un calibrated measurements were taken Actual Calibrated Intensity Shows the Intensity luminance of the display after it has been calibrated If the current Target is set to Maximum Possible Matching or Specific Level and the value is not within 10 of the Target Intensity value then a yellow alert icon is shown to warn that the display could not achieve the desired Target Intensity value when calibrated Actual Calibrated White Point Shows the white point that the display was adjusted to after calibration Date Calibrated Shows the date and time when the calibration was performed Operating Hours when Calib
23. alue Gamma Curve Gamma Curve selects the desired tone response curve of the calibrated displays Options are e Monitor Native Gamma No correction is applied and the display s Look Up Tables are set to linear e Gamma Curve Value The response curve will follow a simple gamma curve Values between 1 0 and 3 0 can be entered A gamma value of 2 2 is popular for most applications e DICOM Curve The response curve follows the DICOM Digital Imaging and Communications in Medicine specification This response curve is aimed at medical use however it can be used for other applications The goal of the DICOM response curve is to have a visually linear display response e Custom Curve Advanced and custom response curves can be selected from presets or created by importing a table of values Click the Edit button to open the Custom Gamma Curve dialog Contrast Ratio Contrast Ratio allows a particular contrast ratio to be used if necessary The contrast ratio is the ratio of white to black luminance Selecting Default will calibrate the display to the highest possible contrast ratio which is limited by the display technology the selected White Point Intensity value and other factors Contrast Ratio Black Level In some applications for example simulating low contrast images such as in newsprint it is useful to have a lower contrast ratio than the display s native value Contrast Ratios in the range of 50 1 to 500 1 can be sele
24. an be used to show a calibrated white screen then the sensor can be used to measure the screen It can also be used to measure the native white point of a display by using the 100 White function in the Test Pattern panel to show a native white screen which can then be measured using the sensor 38 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Test Pattern panel Test Pattern OFF 100 white Calibrated white Apply to Selected display All displays This panel is used to display test patterns on either the currently selected display or all of the displays in the layout Test patterns can be used to visually evaluate the displays both before and after calibration Two patterns are available 100 White and Calibrated White The 100 White pattern is native white with no correction applied by the calibration The Calibrated White pattern is only available if the display has been calibrated and shows the adjusted white after calibration It is useful to visually evaluate the calibration accuracy Clicking Off will turn off the test patterns The Test Patterns can either be shown on the selected display or all displays by selecting the appropriate setting in Apply to Note Since there is a slight color shift with viewing angle when evaluating the color calibration uniformity across multiple displays be sure to stand as far back as possible from the video wall and evaluate from directly in front of
25. are made by the software e Internal Test Patterns Displays are calibrated using internally generated test patterns This simplifies the operation by allowing calibration to be performed automatically without having to manually select different test patterns during the calibration process and without the need to connect a PC to the video input of the displays e 10 bit internal Look Up Tables LUTs Each LCD display monitor supported by NEC Display Wall Calibrator features three internal 10 bit LUTs These tables allow very precise adjustments to be made to the display s Tone Response Curve without reducing the number of displayable colors or introducing color banding artifacts e Gamma Correction As well as adjusting the Intensity luminance and white point of the displays the software will also calibrate the grayscale using the internal LUTs of the displays This means that highly accurate color can be achieved not only at 100 white but at all steps along the grayscale A variety of different Tone Response Curves can be applied also from something as simple as a small simple gamma value to complex custom curves e Flexible Connections Displays can be connected using RS232 LAN or in combinations of both to the host PC used to perform the calibration By using a wireless equipped host PC and LAN displays can be calibrated without making any physical connections to the host PC e Projects All display configurations measurements
26. asurement and Calibration operations Both the White Point and Intensity luminance are shown as numerical values and graphically The White Point shows the measured value compared to the Target White Point in CIE xy This gives an indication as to the accuracy of the calibration compared to the Target value as well as how far the display needed to be adjusted from the native state in order to achieve the Target White Point The Intensity bar shows the measured value If the Target is a specific value then red arrows indicate this level on the bar Uncalibrated Shows the native or un calibrated measurement taken during the Measure operation Calibrated Shows the corrected or calibrated measurement taken during the Calibration operation Display Settings dialog NEC DISPLAY WALL CALIBRATOR USER S GUIDE 41 The Display Settings dialog is accessed from the Edit menu and is divided into 5 different tabs Various settings on the displays can be set and read from this dialog Settings can be applied to either a single display or to all of the displays in the current project by selecting either Selected Display or All Displays Display Settings dialog Power tab i Display Settings Power Clock Input Video Calibration Status OFF Current Power State On Apply to Selected Display coma ID 1 All Displays Clock Input Video Calibration Status Date 25900 PM fsofzo0
27. auses long messages sent to the display to not be transmitted correctly If you encounter this error please check with the hardware vendor to see if newer device drivers are available If this does not solve the issue try using a different model of USB to RS232 adapter NEC DISPLAY WALL CALIBRATOR USER S GUIDE 51 Color Sensor Problem Software is unable to detect the X Rite ColorMunki Solution If the X Rite ColorMunki software is installed it will prevent NEC Display Wall Calibrator from accessing the device even if the main ColorMunki application is not currently running If you are using the ColorMunki software prior to version 1 1 0 e NEC Display Wall Calibrator will detect if the ColorMunki software is running and give the option of closing it automatically e To use the ColorMunki software again after NEC Display Wall Calibrator has closed it you must run the colormunki exe application from the Startup menu in Windows If you are using the ColorMunki software version 1 1 0 or newer e You must turn off the ColorMunki Service in the Windows Control Panel gt X Rite Device Services to allow NEC Display Wall Calibrator to access the device e To use the ColorMunki software again you must turn the ColorMunki Service back on 52 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Assigning an IP address Displays connected via LAN need to be assigned an IP address so that they can be remotely accessed Each display w
28. ay and when it was Calibrated e Calibrated Monitor Settings for each display so that settings can be restored to one or all displays if necessary All of the display measurements and settings are unique to each display and are identified within the software by the model and serial number of each display Project files can be saved at any point By saving Projects using different file names different configurations for the same video wall can be stored and later restored to the displays if necessary Project files can also be used to keep track of when a video wall was last calibrated Analog Video Inputs Important Notice The display calibration process adjusts the digital portion of the video processing within the display For analog video signals such as VGA RGB HV and Option Analog the signal is digitized within the display using an Analog to Digital converter Due to variances in analog video signal levels and offsets from the video source device it may be necessary to also adjust the settings for the video Analog to Digital conversion If the screens on the video wall do not match well in color after calibration use the Test Pattern tool with the Calibrated White setting to evaluate the displays using their internally generated test patterns If the Test Patterns match well then it indicates that the analog video signal levels need to be adjusted Use the Display Settings dialog Video tab to perform an automatic adjustment of th
29. ch display is then calibrated to this Target setting by placing the color sensor on the screen while the software adjusts the internal controls of the display This process is repeated for all displays When the calibration process is completed all of the displays will match The numerical results of the calibration process can be viewed and also the configuration settings for each display and the entire project can be saved for future reference and use Once the connections to each display have been made and configured the measurement and calibration process typically takes between 3 to 6 minutes per display The time until the displays need to be re calibrated will depend on many factors such as the environment and duration they are used the age of the displays the calibration Target settings used and how critical the color matching requirements are Newer displays will tend to drift more rapidly than displays that have been in use for several days or weeks NEC DISPLAY WALL CALIBRATOR USER S GUIDE 9 Main Features and benefits NEC Display Wall Calibrator provides the following features and benefits e Automatic calibration NEC Display Wall Calibrator communicates with the display monitors directly using either RS232 or a LAN Ethernet connection All adjustments to the display settings are performed automatically using this communications link It is not necessary to manually configure the displays as all of the necessary settings
30. ch pixel is controlled to form an image on the screen The color of each pixel is controlled by varying the ratios of light passing through each of the red green and blue sub pixels The overall brightness or Intensity of the screen is controlled by adjusting the brightness of the fluorescent lamp backlight however the adjustment range of the backlight is limited If it is necessary to adjust the Intensity below the level achieved by adjusting the fluorescent lamp backlight alone further adjustments can be made using the internal LUTs look up tables in the display which control the light that passes through each individual pixel Likewise White Point adjustments to the display are made using the internal LUTs to reduce the brightness of one or more colors red green or blue Before calibrating the desired color characteristics of the calibrated video wall must be selected In NEC Display Wall Calibrator these characteristics are called Calibration Targets The software adjusts the monitors to the color characteristics in the selected Target When calibrating a video wall careful consideration should be made as to how the displays will be calibrated so that they match as necessary The video content shown on the displays and how it will be divided on individual displays will determine some of the calibration settings For example when using a video wall consisting of several displays that will be displaying video tiled across all of the d
31. configued with a unique ID IDs will be assigned sequentially by the wizard but can be editied later if necessary Next the connection method for the remaining displays must be selected Two options are available in this case because displays connected to the LAN can either have their own IP address and be connected to the LAN or they can be connected to the first display via daisy chained RS232 In this example they are daisy chained to the first display by RS232 24 NEC DISPLAY WALL CALIBRATOR USER S GUIDE W Display Layout Configuration Wizard Specify the lowest ID in the video wall IDs will be assigned sequentially For each display in the project Starting ID 1 Lastly the ID of the first display is entered The remaining displays in the layout will be assigned sequential IDs In this example the first display has MONITOR ID 1 Clicking Finish will end the wizard and the project will be automatically configured It is possible to see the resulting connection configuration by opening the Summary window Connection Summary Port ID Model S N Status 1 192 168 01 1 Not verified 2 eee 7 2 Not verified 3 192 168 0 1 3 Not verified 4 192 168 0 1 4 Not verified 5 192 168 0 1 5 Not verified 6 192 168 0 1 6 Not verified In this example all 6 displays have been assigned the same IP address in the software even though only the first is actually connected to the LA
32. cted Note If the selected contrast ratio is higher than what the display is actually capable of achieving then the display will calibrate to the highest possible contrast ratio If a specific Contrast Ratio is selected it is recommended that the number of Calibration and Measurement Steps be set to at least 32 in the Preferences dialog 30 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Custom Gamma Curve dialog E Custom Gamma Curve NTSC video SMPTE 240M Import a wi T E m ee a A uw a D Input Level The Custom Gamma Curve dialog is accessed by clicking the Edit button in the Gamma Curve section of the Edit Calibration Target dialog Advanced response curves can be selected from presets or custom curves can be created by importing a table of values The following preset curves are available e SRGB A curve based on the sRGB specification that includes the offset transition and slope components e L A curve based on L in the Lab specification The L curve is intended to be more perceptually uniform than a simple gamma value curve e NTSC Video A curve based on the SMPTE 170M specification for NTSC that includes the offset transition and slope components e SMPTE 240M A curve based on the SMPTE 240M specification for 1125 line HD video that includes the offset transition and slope components Custom curves can be created and imported into NEC Display Wall Calibrator
33. ctive for a period of three 3 years from the date of first consumer purchase Spare parts are warranted for ninety 90 days Replacement parts or unit may be new or refurbished and will meet specifications of the original parts or unit This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty is limited to the original purchaser of the Product and is not transferable This warranty covers only NEC DISPLAY SOLUTIONS supplied components Service required as a result of third party components is not covered under this warranty Service required as a result of abuse or improper usage is also not covered under this warranty In order to be covered under this warranty the Product must have been purchased in the U S A or Canada by the original purchaser This warranty only covers Product distribution in the U S A or Canada by NEC DISPLAY SOLUTIONS No warranty service is provided outside of the U S A or Canada Proof of Purchase will be required by NEC DISPLAY SOLUTIONS to substantiate date of purchase Such proof of purchase must be an original bill of sale or receipt containing name and address of seller purchaser and the serial number of the product NEC DISPLAY SOLUTIONS SHALL NOT BE LIABLE FOR DIRECT INDIRECT INCIDENTAL CONSEQUENTIAL OR OTHER TYPES OF DAMAGES RESULTING FROM THE USE OF ANY NEC DISPLAY SOLUTIONS PRODUCT OTHER THAN THE LIABILITY STATED ABOVE THESE WARRANTIES ARE I
34. d the results can be visually evaluated by using the Test Pattern feature On the Test Pattern panel select All displays and click the Calibrated White button Note Since there is a slight color shift with screen viewing angle so be sure to evaluate the video wall from a distance and from directly in front Click the Off button to turn off the test patterns The numerical results of the measurement and calibration process are available by selecting Summary from the View menu This window shows the connection settings for all of the displays including the model and serial number information for each display If the displays do not match well when showing an analog video signal this indicates that the analog video signal levels may need to be adjusted to compensate for variations that may cause color shifts between displays See the Analog Inputs Important Notice for more information 12 Save Save the project file so it can be used again in the future to re calibrate the displays when necessary 48 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Frequently Asked Questions Calibration Question Can use NEC Display Wall Calibrator to calibrate a single display Answer Yes Use the Layout Wizard to create a layout with a 1x1 video wall and calibrate as normal Question How often will need to use NEC Display Wall Calibrator to re calibrate a video wall Answer The time until the displays need to be re calibrated will depend
35. d as a commitment by NEC Display Solutions Ltd NEC Display Solutions Ltd assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual All rights reserved Your rights of ownership are subject to the limitations and restrictions imposed by the copyright laws as outlined below It is against the law to copy reproduce or transmit including without limitation electronic transmission over any network any part of the manual except as permitted by the Copyright Act of the United States Title 17 United States Code Under the law copying includes translation into another language or format The above is not an inclusive statement of the restrictions imposed on you under the Copyright Act For a complete statement of the restrictions imposed on you under the copyright laws of the United States of America see Title 17 United States Code USA and Canada www necdisplay com Europe www nec display solutions com Asia Pacific www nec display com ap contact Revision 090811 NEC DISPLAY WALL CALIBRATOR USER S GUIDE 3 HARDWARE LIMITED WARRANTY U S A and Canada Only NEC DISPLAY SOLUTIONS warrants the NEC Display Wall Calibrator Hardware hereinafter Product or Products to be free from defects in material and workmanship and subject to the conditions set forth below agrees to repair or replace at NEC DISPLAY SOLUTIONS s sole option any part of the enclosed unit which proves defe
36. deviates from being achromatic neutral in color such as gray For example red is a saturated color while pink is less saturated and white has no saturation Subnet A subnetwork or subnet describes networked computers and devices that have a common designated IP address routing prefix TCP IP Transmission Control Protocol Internet Protocol Tone Response Curve A graph representing the relationship between the input and output of a system or device In NEC Display Wall Calibrator Tone Response Curves represent the relationship between the intensity of a color within an application and the light intensity dis played on the monitor USB Universal Serial Bus A communication bus used to connect up to 127 devices such as keyboards mice scanners color sensors etc White point Specifies the color of pure white on a display usually as a Color Temperature expressed in Kelvin or as CIE xy chromaticity coordinates NEC Copyright 2009 NEC Display Solutions Ltd All rights reserved USA and Canada www necdisplay com Europe www nec display solutions com Asia Pacific www nec display com ap contact
37. e The software will then automatically measure the display characteristics which will take about 30 seconds When complete the next display to be measured will flash and this process will continue until all displays are measured As each display is successfully measured its rectangle in the main window will change from Cyan to Magenta 9 Define the Calibration Target Select Calibration Target from the Edit menu or click the Edit button in the Calibration Target panel to open the Edit Calibration Target dialog The default values are suitable for most applications If necessary for a particular application custom settings for the method of Intensity adjustment desired White Point Gamma value and Contrast Ratio can be selected 10 Calibrate displays Click the Calibrate All button on the Actions panel to start the calibration process You will be prompted to place the sensor on the screen of each display in turn The display to place the sensor on will flash alternate red and green colors until the sensor has been positioned on the screen The software will then automatically calibrate the display which will take 2 minutes or more When complete the next display to be calibrated will flash and this process will continue until all displays are calibrated As each display is successfully calibrated its rectangle in the main window will change from Magenta to Green 11 Evaluate results Once the calibration process is complete
38. e type Intensity shows the Target display intensity adjustment method and value Note When using the Maximum Possible Matching method for Intensity the actual value used to calibrate all of the displays will not be shown until all of the displays have been measured and the Target calculated Colorimeter panel Colorimeter Measure CIE xy Color Temperature oa ele 6350 kK vi 0 340 0 0049 Auw Y 132 28 cdm NEC DISPLAY WALL CALIBRATOR USER S GUIDE 37 This panel allows measurements of colors displayed on the screen to be taken with the calibration sensor and the numerical results are displayed To take color measurements using the Colorimeter display a white image on the screen to be measured and place the calibration sensor on the screen Then click the Measure button to take a single color measurement and display the results The measurement results are shown in CIE xyY and Color Temperature The Color Temperature field shows the corresponding correlated black body radiator temperature of the measurement in Kelvin The Auv Delta uv value indicates how far the measurement is from the blackbody radiator locus The Kelvin value is only meaningful for colors that are near the black body radiator locus such as most shades of white This feature can be used together with the Test Patterns tool to verify the calibration accuracy of a display In this case the Calibrated White function in the Test Pattern panel c
39. e Summary window is accessed from the View menu Summary Connection Summary Monitor ID Model Serial Number Status S461UN SYOPTOLOYA Calibrated z 192 168 1 11 1 S461UN sy orPToOzZoy4 Measured Calibration Summary Actual Uncalibrated Maximum Operating Actual Operating Uncalibrated white Point Uncalibrated Calibrated Date Measured Hours when Calibrated Calibrated Date Calibrated Hours when Intensity Contrast Ratio White Point CIE xy Intensity Measured Intensity CIE xy Brightness Calibrated astang 9518K 0 283 0 293 704K J 2 I a 2 594 7 cdim 0 281 0 294 2897 1 515 2 cdim 6 amp fi7j2009 12 38 36 PM 150 1 587 0 cdim 3111 1 s24 2cdim amp fi7j2009 12 37 48 PM 192 515 2 cdim 6f17 2009 12 40 47 PM 192 LOO 651 0 313 0 329 This window shows the current layout configuration and connections as well as detailed information about the calibration results Connection Summary Port Shows the Communications Port to the display either the RS232 COM Port or LAN IP Address Monitor ID Shows the Monitor ID used to identify the display monitor Model Shows the model of the display monitor Serial Number Shows the serial number of the display monitor Status Shows the current status of the display monitor in the measurement and calibration process Calibration Summary Uncalibrated Intensity Shows the measured native Intensity luminance of the display when un calibrated Uncalibrated
40. e display may be different than the required Gamma value a correction needs to be applied so that the apparent display Gamma matches that of the required Target In NEC Display Wall Calibrator this correction is applied to the LUTs Look Up Tables inside the monitor The software also uses the monitor s LUTs for Targets that have Tone Response Curves which do not follow a normal Gamma curve An example is DICOM which uses a curve that changes shape based on how bright the display is NEC DISPLAY WALL CALIBRATOR USER S GUIDE 13 Calibrating the gamma or Tone Response Curve of the display during calibration will automatically correct for any color deviations in shades of gray between black and white This provides the best possible grayscale color tracking Contrast Ratio The Contrast Ratio of the display is the ratio of the measured Intensity to the measured Black Level The Black Level is the luminance or brightness of black when displayed on the screen For LCD monitors the minimum or native Black Level is typically fixed in ratio to the Intensity value due to the display technology NEC Display Wall Calibrator allows the Contrast Ratio to be selected for applications that require a specific contrast ratio However the calibrated contrast ratio can not be higher than the native contrast ratio since the minimum Black Level that the display can achieve is limited by the display technology The Contrast Ratio is adjusted reduced by
41. e the calibrated settings After calibration use the Calibration tab on the Display Settings dialog to apply the calibration settings to other video inputs 26 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Dialogs Settings and Menus Main NEC Display Wall Calibrator window The NEC Display Wall Calibrator window shows the current settings and status of the display calibration All of the features of NEC Display Wall Calibrator are accessed from this window and the menus Some of the main features of this window are shown below Actions panel Controls the main operations of the calibration process G3 NEC Display Wall Calibrator untitled ndwc File Edit view Help Verify All Initialize All Measure All 2 3 Calibrate Selected Not verified Not verified Calibrate All 5 6 Not verified Not verified Display layout diagram Shows a visual representation of the video wall layout Individual displays can be selected by clicking on a rectangle Connection panel Shows the communications connection settings for the currently selected display Settings can be modified if necessary Ses Gx Connectio Communications Interface OLEA COM Port LAN IP address Monitor ID Colorimeter E xX CIE xy Color Temperature ma K wo Colorimeter Test Pattern Status Calibration Target white Point D65 d Gamma 2 20 xt Intensity Maximum Matching QO Contrast Ratio Monitor Default Dis
42. e video levels Note This adjustment process requires specific patterns to be displayed on the video signal in order for the display to automatically adjust the video signal levels correctly Failure to display the correct signal may result in the video levels being incorrectly set and the displays may not match in color when using an analog video source NEC DISPLAY WALL CALIBRATOR USER S GUIDE 15 Planning and Configuring a Wall Layout Planning In order for the software to uniquely identify and communicate with each display the software must be correctly configured with the following settings e The number of rows and columns of displays in the video wall e The communications interface type for each display RS232 or LAN e The connection RS232 COM Port or IP address of each display e The MONITOR ID of each display e The order in which displays should be measured and calibrated For large video walls where it is necessary to use a ladder or platform to access the screen of each display careful consideration should be made of the layout order in order to minimize physical movement and in turn maximize the efficiency and speed of the calibration process For example if using a ladder it may be easier to calibrate a vertical column of displays and then move the ladder across to the next column Similarly if using a horizontal platform it may be easier to calibrate a horizontal row of displays and then move the platform up
43. ected Notify me when this connection has limited or no connectivity Internet Protocol TCP IP Properties f General Next enter a temporary IP address for the PC such as 192 168 0 255 and a subnet mask of 255 255 255 0 Click OK and close the Network Settings You can get IP settings assigned automatically if your network supports this capability Otherwise you need to ask your network administrator for the appropriate IP settings Obtain an IP address automatically IP address 192 168 0 255 Subnet mask 255 255 255 0 Default gateway Prefered DNS server Altemate DNS server Next open a web browser and go to the URL of the display s web server by entering http 192 168 0 10 This should display the display s MONITOR NETWORK SETTINGS page NEC DISPLAY WALL CALIBRATOR USER S GUIDE 53 If this page can not be reached e Confirm that the display is powered on and connected to the PC either directly or via a HUB e Confirm that the IP address assigned to the display is at the default value by performing a LAN RESET from the OSD on the display e Confirm that the EXTERNAL CONTROL setting on the OSD is set to LAN e Try refreshing the web page in the browser It may take several refreshes before the display can be found e Check if any firewall software or settings on the PC could be preventing access to the display s IP address Once the web page has appeared the dis
44. elected to verify that each display is accessible and correctly configured If a display fails this step then follow the troubleshooting guide in chapter 7 Once all displays have Measure All been verified it is possible to go on to the next step Calibrate Selected Initialize All This will reset each display to the default color settings so that the 7 native performance of each display can be measured before the calibration Calibrate all Settings such as the Brightness Color mode Contrast etc will be reset Measure Selected This will measure the default native color characteristics of the currently selected display These measurements will determine the maximum possible Intensity that will give a color match with all the displays You will be prompted to place the sensor on the screen while the software displays various test patterns and takes measurements Measure All This is the same as Measure Selected except that all displays will be measured sequentially You will be instructed which display to place the color sensor on while the software displays various test patterns and takes measurements This will repeat until all displays are measured There is no need to interact with the host PC while the displays are being measured with this option since the next display is selected automatically and the routine will wait until the color sensor is placed on the screen indicated This is useful if it is not convenient to
45. g and Maximum Possible Per Display Intensity adjustment types is illustrated below Maximum Possible Matching Intensity Adjustment Display 1 Display 2 Display 1 Display 2 Display 3 Display 4 Display 3 Display 4 Before Calibration After Calibration Maximum Possible Per Display Intensity Adjustment Display 1 Display 2 Display 1 Display 2 Display 3 Display 4 Display 3 Display 4 PL Before Calibration After Calibration 12 NEC DISPLAY WALL CALIBRATOR USER S GUIDE The choice of Intensity adjustment method will depend on the particular application and viewing environment If the displays are being used in a bright environment then the Intensity would generally need to be the maximum possible So either Maximum Possible Matching or Maximum Possible Per Display would be used White Point The White Point specifies the color of pure white on a display Since there is no unique perceptual or physical definition of what white is it must be defined in terms of a standard or device independent color space to be measured and reproduced There are several methods of specifying a white point including using a blackbody radiator color temperature or as a point in a device independent color space NEC Display Wall Calibrator allows the white point to be specified either as a black body radiator color temperature in Kelvin as a CIE standard illuminant or as CIE xy chromaticity coordinates A White Point expressed as a blackbod
46. ght intensity Luminance can be described in units of Candelas per meter squared cd m but is often referred to as just Candelas or Nits for sake of brevity CCFL Cold cathode fluorescent lamp used for the backlight on LCD display panels CIE The Commission Internationale d Eclairage International Commission on Illumination An organization that sets many of the standards used in color and color measurement CIE uv chromaticity coordinates Coordinates in the CIE uv color space which are derived directly from CIE xyY color space CIE uv is more perceptually uniform than CIE xy CIE xy chromaticity coordinates Coordinates in the CIE xyY color space representing color independent of luminance CIE xyY A standard color space in which the Y component represents luminance The x and y components represent color Color Gamut See Gamut Colorimeter An optical measurement device used to measure color that responds to light by separating it into red green and blue components Color Temperature The color of light given off by an object known as a blackbody as it is heated to a given temperature in degrees Kelvin Low color temperatures such as 5000K are reddish whilst higher color temperatures such as 9300K are bluish A color temperature of 6500K is considered to be neutral white COM Port The original name of the serial port interface on IBM PC compatible computers NEC DISPLAY WALL CALIBRATOR
47. hains Each display on a daisy chain must have a unique MONITOR ID Display 1 Display 2 COM1 adaz IN RS232 IN PC RS232 OUT D 1 D 2 RS232 RS232 Display 3 Display 4 RS232 OUT ID ID 2 RS232 RS232 The following image shows how this layout looks in the Summary window when configured Notice that displays connected on COM1 can have the same IDs as those on COM2 because they are on separate daisy chains Connection Summary Port ID Model S N Status 1 COM1 1 Not verified 27 COM1 2 Not verified 3 C0M2 1 Not verified 4 COM 2 Not verified 18 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Single IP LAN with daisy chained RS232 In this example the host PC is connected to the first display via LAN Subsequent displays are connected together using RS232 daisy chaining Each display on a daisy chain must have a unique MONITOR ID The first display is configured to use LAN as the EXTERNAL CONTROL on the OSD The other displays are configured to use RS232 as the EXTERNAL CONTROL on the OSD The RS232 OUT on the first display is connected to the RS232 IN on the next display Since communications to all of the displays is routed through the first display the software is configured to use the IP address of the first display for each display The first display will translate commands via LAN to the RS232 OUT to be received by the other displays in the video wall Display 1 Display 2 LAN RS232 IN
48. have the host PC nearby for example when standing on a ladder Calibrate Selected This will calibrate the currently selected display to the Target settings You will be prompted to place the sensor on the screen while the software displays various test patterns and takes makes adjustments Calibrate All This is the same as Calibrate Selected except that all displays will be calibrated sequentially You will be instructed which display to place the color sensor on while the software displays various test patterns and makes adjustments This will repeat until all displays are calibrated There is no need to interact with the host PC while the displays are being calibrated with this option since the next display is selected automatically and the routine will wait until the color sensor is placed on the screen indicated This is useful if it is not convenient to have the host PC nearby for example when standing on a ladder 36 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Connection panel Connection Communications InterFace R5232 COM Port O LAN Monitor ID This panel is used to modify the communications connection settings for the currently selected display in the layout Connection types of RS232 or LAN Ethernet can be selected Is using RS232 the RS232 COM port on the host PC used to communicate with the displays can be selected Currently available COM ports on the host PC are listed in COM Port Otherw
49. he number of rows and columns is entered In this example there are 3 columns and 2 rows Note To calibrate a single display that is not part of a video wall enter a size of 1x1 22 NEC DISPLAY WALL CALIBRATOR USER S GUIDE W Display Layout Configuration Wizard Specify the video wall orientation Select the location of the display with the lowest ID or IP address in the video wall This Will be used so that the layout of the video wall can be represented in the main window Top Right Bottom Left Bottom Right Next the corner location of the first display in the layout will be selected This should generally be the display with the lowest MONITOR ID or IP address so that sequential IDs or IP addresses can be automatically assigned to the rest of the displays This display will also be the first one to be measured and calibrated when automatically performing these actions on all displays 4 Display Layout Configuration Wizard Select the order in which the display IDs or IP addresses are arranged The physical cable connections between displays do not have to Follow this order ke Direction Counter clockwise Line Order Scan Line O fig 4q Next the order of remaining displays can be selected Again this selection determines how sequential IDs or IP addresses will be automatically assigned to the rest of the displays and the order of measurement and calibration Keep in mind that the automat
50. ically assigned IDs or IP addresses can be modified later if necessary NEC DISPLAY WALL CALIBRATOR USER S GUIDE 23 i Display Layout Configuration Wizard Specify how the displays are connected to this PC Select R5232 if you are using a COM port on this PC and a serial cable Select LON iF you ke are connecting using the TCPyVIP LAN interface on the display Cy R5232 Select the R5232 COM port on this PE that will be used to communicate with the displays COM Port comi v LAN Enter the IP address of the First display in the video wall IP address 192 168 0 1 Next the connection method of the displays is selected In this example a LAN connection from the host PC will be used The first display has been assigned IP address 192 168 0 1 All of the remaining 5 displays in the video wall will use an RS232 daisy chain to communicate via the LAN connection on the first display W Display Layout Configuration Wizard Specify how the displays on the LAN are connected Displays can be connected to each other by RS232 or each can be individually connected to the LAM All displays by LON Each display is connected bo the LAN via a hub and has it s own IP address Addresses for each display will be assigned sequentially but can be editied later if necessary Displays can have the same ID Displays are connected to each other by an RS232 cable Only the First display is connected by LAN Each display must be manually
51. ideo wall This is useful to verify that a display is correctly configured and appears at the correct location in the video wall layout To identify 1 a display right click within the rectangle and select Identify Additional information about a display is shown in a ToolTip by hovering the pointer over a rectangle 1 b gt Calibrated Port LOPS ID 1 Model 4610M Sih S OPTOLOY A 28 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Edit Calibration Target Configuration dialog Edit Calibration Target Intensity Ri x Maximum Possible Matching ais Displays are adjusted to match in both Intensity and White Point The Intensity will be the highest possible that achieves a match on all displays Maximum Possible Per Display Displays are all adjusted to the specified white Point but the Intensity will be the highest that each individual display can achieve C Specific Level 300 0 cdjrn2 Displays are all adjusted to the specified white Point and the Intensity is adjusted to the specified value IF this Intensity can not be achieved then it is adjusted to the closest possible Wale Contrast Ratio Black Level OD Default v White Point b v Color Temperature 6506 K 0 0001 A uy CIE xy x 0 3127 y 0 3290 Calculate Highest Intensity White Point Calculates the White Point that will give the highest possible overall Intensity Displays must First be measured before this
52. ilable If a newer version is available information about the version and download links will be shown An Internet connection is required for this feature to operate 46 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Quick Start to NEC Display Wall Calibrator 1 Install Software Install the NEC Display Wall Calibrator software on the host PC The serial number provided on either the CD ROM cover or with your purchase will be required to install the software 2 Connect color sensor Connect the color sensor to a USB port on the host PC and verify the drivers are installed correctly 3 Warm up displays Power on each of the displays in the video wall The displays should be warmed up for at least 30 minutes before calibrating 4 Configure and connect displays It is not necessary to connect the video output from the PC to any of the displays The only connection to the displays will be either RS232 and or LAN Ethernet Wireless LAN can also be used from the host PC if using a wireless access point or router See chapter 3 for detailed information about the various connection configurations 5 Define Video Wall Layout and Connections Use the Layout Wizard from the Edit menu to specify the number of displays their layout calibration order and connection method If necessary modify the connection settings for any display by using the Connection panel 6 Verify Communications Test the communications to all the disp
53. ise if using LAN the IP Address of the display can be entered See Chapter 8 for instructions on how to assign the IP address for each display For both communications types the Monitor ID of the display must be selected and this must match the ID selected on the display s OSD setting If displays are daisy chained together using RS232 each display must have a unique Monitor ID assigned that must match that set on the display s OSD setting The communications settings and link to the display can be tested by clicking the Test button This will attempt to communicate with the display on the selected communications interface and Monitor ID Clicking the Update button will update the communications connection settings for the currently selected display in the layout Note If changes have been made but the Update button has not been clicked then the changes will be lost if another display is selected in the layout Calibration Target panel Calibration Target White Point DES Gamma 2 20 w Intensity Maximum Possible P Contrast Ratio Monitor Default Contrast Ratio shows the Target contrast ratio This panel shows the Calibration Target settings that will be used when the displays are calibrated The Calibration Target settings can be modified by clicking Edit which will open the Edit Calibration Target dialog White Point shows the Target White Point Gamma shows the Target gamma or Tone Response Curv
54. isplays simultaneously it is essential that all of the displays match in both White Point and Intensity brightness However if for example the displays each show separate video on their screen then the Intensity matching between the displays may not be as important as having each display be as bright as possible Having the displays match in White Point only may be sufficient The NEC Display Wall Calibrator system provides the flexibility for meeting different scenarios such as these When calibrating a video wall to match in both White Point color and Intensity brightness the Target Intensity can only be as high as the dimmest display This is why it is necessary to first measure all of the displays in their native or uncorrected state to find out the native White Point and Intensity values for each display From these measurements the lowest common Intensity value for the chosen White Point can be calculated by the software About Calibration Targets A Calibration Target consists of up to four specifications that describe the color characteristics of the display e Intensity e White Point e Gamma or Tone Response Curve TRC Contrast Ratio NEC DISPLAY WALL CALIBRATOR USER S GUIDE 11 Intensity Intensity specifies the luminance or brightness of white when displayed on the screen The maximum Intensity value of a display will depend on many factors such as the color temperature of the White Point selected the type
55. ith a LAN interface has a default IP address of 192 168 0 10 This address must be changed in order to avoid conflicts when other displays are connected to the LAN When the LAN RESET operation is performed on a display s OSD the IP address will be reset to the default value It is recommended to assign the IP address of a display by connecting a PC directly to the LAN port on the display or via a LAN HUB while no other devices are connected If the PC being used to set the IP address of the display is not currently set to access the subnet that includes the display s defaults IP address it will be necessary to temporarily modify the network settings in order to assign the PC atemporary IP address and subnet so that the display can be accessed Once the display has been configured the PC network settings should be restored 4 Local Area Connection 5 Properties Open the Network Settings properties of the PC and select Internet Protocol General Advanced TCP IP in the list then click the Properties button Connect using Eg NVIDIA nForce 10 100 1000 Mbps E This connection uses the following items M A File and Printer Sharing for Microsoft Networks QoS Packet Scheduler v Intemet Protocol TCP IP a Description Transmission Control Protocol Intemet Protocol The default wide area network protocol that provides communication across diverse interconnected networks C Show icon in notification area when conn
56. lays by clicking the Verify All button on the Actions panel This will attempt to communicate with each display in the layout If there is an error in verifying communications with a display see the troubleshooting guide in chapter 7 As each display is successfully tested it s rectangle in the main window will change from Yellow to Cyan Once all displays are verified it is possible to continue on with the next stage of the calibration process 7 Initialize Display Settings Click the nitialize All button on the Actions panel to reset the color settings on each display to the default state 8 Measure displays with default settings If Maximum Possible Matching is selected as the ntensity adjustment method in the current Calibration Target it NEC DISPLAY WALL CALIBRATOR USER S GUIDE 47 will be necessary to measure the color characteristics of each display so the software can calculate how to match all the displays These measurements will determine the maximum possible Intensity that will give a color match with all the displays Click the Measure All button on the Actions panel to start the measurement process You will be prompted to place the sensor on the screen of each display in turn The display to place the sensor on will flash alternate red and green colors until the sensor has been positioned on the screen Place the sensor flat against the center of the screen and hold it steady while applying the minimum force possibl
57. libration Target and the level value being used can be achieved by all of the displays at the specified white point then the Measurement process can be skipped For example if it is known from a previous set of measurements that all of the displays can achieve an Intensity of at least 400 cd m at a particular White Point then if a Target Intensity level of 300 cd m is used it would not be necessary to perform the Measurement step The following table shows some example typical calibration times for various sized video walls Measurement Time Calibration Time Total Time minutes minutes minutes 18 aad o e o a o o 5x5 xs o e o a Cd Note When measuring and calibrating the video wall the software will automatically move to the next display once the current display has been completed The next display will be indicated by the screen on that display flashing alternating green and red The software will wait until the color sensor has been placed on the display screen before automatically proceeding with the measurement or calibration process Video Inputs Each video input can have its own settings for various controls such as Brightness Gamma Selection Picture Mode etc During calibration the settings for the currently selected video input are automatically configured However if other video inputs are going to be used as well with the video wall then the settings for those inputs will need to be correctly configured to us
58. necessary to exit the NEC Display Wall Calibrator application and launch it again In some cases it may be necessary to re connect the USB sensor for it to be detected Model and Serial Number Shows the model and serial number of the currently selected calibration sensor device NEC DISPLAY WALL CALIBRATOR USER S GUIDE 33 Preferences dialog Calibration tab G3 NEC Display Wall Calibrator Preferences Calibration Sensor Calibration Interface Grayscale Calibration steps 16 Default vl Sets the number of steps used to measure the grayscale during calibration 4 larger number will generally result in a more accurate grayscale calibration but will increase the calibration time At least 16 steps are recommended and 32 is sufficient for most applications Intensity Adjustment Use Brightness Control The Brightness control on the display is used if necessary to achieve the target Intensity This will provide the best Contrast Ratio Adjusting the Brightness control can take longer and the Intensity may drift slightly after being adjusted Leave Brightness Control at Maximum The Brightness control on the display is set to the Maximum value and any adjustments necessary to achieve the target Intensity are done using the internal LUTs This may give a slightly lower calibrated Contrast Ratio Leaving the Brightness control at Maximum will mean the display is always using the maximum power Do not adjust Brightness Co
59. nsor and automatically entered in the CIE xy chromaticity coordinate fields by clicking the Measure button This is useful for cloning the white point of another display monitor 32 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Preferences dialog The Preferences dialog is accessed from the Edit menu and is divided into 3 different tabs The default settings for the entire Preferences can be restored by clicking the Defaults button G3 NEC Display Wall Calibrator Preferences Calibration Sensor Calibration Interface Sensor type xRite iOne Display v 4uto Detect Model NEC MDSYSENSOR Custom iOne Display v2 Serial Number 951011 Note If the Calibration Sensor was connected after launching this application it may be necessary to restart this application in order to detect the sensor If the sensor is still not detected try reconnecting the USB cable Preferences dialog Calibration Sensor tab Sensor Type Selects the model of calibration sensor to use and shows the current model being used Auto Detect Attempts to detect the selected model of calibration sensor NEC Display Wall Calibrator will automatically detect the calibration sensor when the application is started however if the sensor was not connected at that time or if it was being used by another application then it may be necessary to re detect it Note If the sensor was not attached when NEC Display Wall Calibrator was launched then it may be
60. ntrol The Brightness control on the display will not be adjusted From the current setting Any adjustments necessary to achieve the target Intensity are done using the internal LUTs This option allows the Brightness to be manually adjusted before calibration if necessary C Extended Intensity stabilization time Increases the waiting time For the display to stabilize while the intensity is being adjusted This option can be used if necessary to increase the accuracy of the intensity adjustment when a Target with a Specific evefof Intensity is used It may significantly increase the calibration time and is normally only useful when a very low Intensity value is used Calibration and Profile Steps Selects the number of measurement steps to take when calibrating the display A larger number of steps will generally result in a more accurate grayscale calibration but will increase the calibration time 16 steps is the recommended setting for most applications Intensity Adjustment Sets how a particular Intensity value is achieved during the calibration process if necessary Options are e Use Brightness Control The Brightness control on the display is used if necessary to achieve the target Intensity This will provide the best possible Contrast Ratio and also lowest power consumption assuming the target Intensity used results in the brightness control being reduced from maximum Adjusting the Brightness control can increase the calib
61. olor sensor in the holder when not in use e Never touch the measurement window in the color sensor e Never disconnect the color sensor while the NEC Display Wall Calibrator software is running e Always allow the displays to warm up for at least 30 minutes before calibrating Note e USB extender cables Some models of color sensors may not work properly when using a USB extender cable or when connected via a USB hub device If you experience problems with detecting color sensor or taking measurements with the color sensor try connecting it directly to the host PC e This document covers both the Mac OS and Windows versions of the software The features and functions of both versions are identical unless noted otherwise The majority of the User Interface screen images in this document show the Windows version however the Mac OS version is identical unless noted otherwise e Analog Video Inputs When using analog video inputs on the displays it may be necessary to automatically adjust the video signal levels to compensate for variations in the video signals that may cause color shifts between displays See the Analog Inputs Important Notice for more information NEC DISPLAY WALL CALIBRATOR USER S GUIDE 7 Supported Display Monitors NEC Display Wall Calibrator supports the following NEC display monitor models e X461UN 46 LCD monitor X461HB 46 LCD monitor e P401 40 LCD monitor e P461 46 LCD m
62. on is available in the White Point group in the Edit Calibration Target dialog Gamma and Tone Response Curves TRC The Gamma or Tone Response Curve of a display is the relationship between the video input signal level and the light output brightness displayed on the monitor The display monitor is a nonlinear display device In simple terms this means that doubling the level of the video input signal to the display does not double the light output For CRT based displays the light output follows a mathematical power function of the input video signal This power function has an exponent called gamma which is commonly used to describe the relationship between the video input signal and light output of the screen A gamma value of 1 would result in a perfectly linear display doubling the signal level doubles the light output and the Tone Response Curves would be straight lines The particular Tone Response Curves of a display will change with the display color settings and may vary from one display to the next If accurate color matching is to be performed the display s Tone Response Curves must be accurately measured and compensated for NEC Display Wall Calibrator uses the color sensor to automatically measure the Tone Response Curves of the display Normally a standard Gamma value is required when working with images For example the SRGB standard color space target specifies a display Gamma value of 2 2 Since the Gamma value of th
63. on many factors such as the environment and duration they are used the age of the displays the calibration Target settings used and how critical the color matching requirements are Newer displays will tend to drift more rapidly than displays that have been in use for several days or weeks Typical re calibration periods could be six months for most applications and as low as one month for color critical applications NEC DISPLAY WALL CALIBRATOR USER S GUIDE 49 Troubleshooting Installation and Setup Problem Measure and Calibrate buttons are disabled Solution The Measure and Calibrate buttons are disabled for any of the following reasons e No supported calibration sensor was detected e No supported display monitor was detected e All of the displays have not yet been Verified Problem Verify Communications operation fails Solution Check that e Each display is correctly configured to use either then LAN or RS232 interface by confirming the EXTERNAL CONTROL setting on the OSD menu e The MONITOR ID is set correctly on the OSD and matches the value assigned in the software If using RS232 e If using daisy chaining confirm that no other displays on the same chain have the same MONITOR ID e Make sure that each display is connected via a NULL modem cable and that the correct IN our OUT socket on the display is used e Make sure that no other application or process is using the specified COM port If using LAN e Make
64. onitor System Requirements NEC Display Wall Calibrator has the following system requirements Microsoft Windows Operating System Microsoft Windows 2000 XP XP x64 Mac OS 10 4 and higher Server 2003 Vista Vista x64 Windows 7 or Windows 7 x64 Supported Color e GretagMacbeth Eye One Display V1 SENOS e X Rite GretagMacbeth Eye One Display V2 e X Rite GretagMacbeth Eye One Monitor Eye One Pro e X Rite ColorMunki e Monaco OptixXR X Rite DTP 94 e ColorVision Datacolor Spyder 2 e Datacolor Spyder 3 At least one available USB port for Color Sensor An active USB extender cable of up to 5M 16 feet in length can be used if necessary with some models of color sensors USB extender cables should not be used with the X Rite GretagMacbeth Eye One Monitor Eye One Pro or X Rite ColorMunki sensors Standard TCP IP LAN interface optional Included on all Macs if using RS232 or Wireless LAN One or more RS232 COM Ports optional A USB to RS232 adapter can be used if if using LAN connecting the Mac to displays via RS232 instead of via LAN Null modem cables to connect devices A USB to RS232 adapter can be used if Null modem cables to connect devices necessary 8 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Introduction to NEC Display Wall Calibrator Overview The aim of the NEC Display Wall Calibrator system is to automatically adjust multiple displays used in a video wall so that
65. pla Measurements Calibration Target EE Calibration Target Shows the current Calibration Target settings Click Edit to open the Calibration Target Configuration dialog box used to modify Target settings NEC DISPLAY WALL CALIBRATOR USER S GUIDE 27 The main area in the window shows a visual representation of the current video wall layout Each rectangle represents a display The color of the rectangle shows the current status of a particular display This coloring makes it easy to see the status even when viewing from a distance Within each rectangle the displays sequence number is shown This number is used to identify each display and the number ordering represents the order in which displays will be measured and calibrated when performing operations on multiple displays Individual displays can be selected by clicking on a rectangle The currently selected display is highlighted by a rectangle The layout including the number of rows and columns in the video wall and order of the displays is configured by using the Layout Wizard An individual display can be excluded from the current project by disabling it To disable a display right click within the rectangle and select Disable This feature can be used for example if the video wall layout is not a rectangular shape 1 Mot verified Identify An individual display can also be made to flash temporarily so it can be visually identified in the v
66. play s IP address and subnet mask can be entered and updated in the display It is highly recommended to assign each display a static IP address so that the IP address will not be reassigned to another device if the network is reset Note Once the IP address is updated the display will no longer be accessible from the current IP address Next restore the original network settings on the PC 54 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Glossary Achromatic Neutral in color having no hue Additive Primaries Red green and blue light that when combined in different relative inten sities produces different colors See also Subtractive Primaries Backlight the internal light source for a Liquid Crystal Display such as fluorescent lamps or array of LEDs Light Emitting Diodes Blackbody A hypothetical object that absorbs all incident radiation thus any radiation e g light coming from a blackbody must be emitted from it and not reflected Blackbody Radiator Locus The curve formed when the color of light radiated from a black body is plotted at different temperatures on a color space such as CIE xyY Black Level The luminance or brightness of black when displayed on the screen Calibration The process of bringing a device such as a display monitor to an absolute stan dard to ensure consistency over time and with other similarly calibrated devices Candelas cd An international unit of li
67. rated Shows the number of hours the display has been in operation when the calibration was performed NEC DISPLAY WALL CALIBRATOR USER S GUIDE 45 Brightness Setting Shows the OSD Brightness setting value that the display was adjusted to when the calibration was performed Menus File menu New Project Creates a new project and erases all of the current data Open Project Opens an existing Project file Save Project Saves the current Project to a file Save Project As Saves the current project with a new file name Exit Closes the application Edit menu Preferences Opens the Preferences dialog Layout Wizard Opens the Display Layout Configuration Wizard Calibration Target Opens the Edit Calibration Target dialog Display Settings Opens the Display Settings dialog View menu Summary Opens or closes the Summary window Connection Hides or shows the Connection panel Calibration Target Hides or shows the Calibration Target panel Colorimeter Hides or shows the Colorimeter panel Display Measurements Hides or shows the Display Measurements panel Test Pattern Hides or shows the Test Pattern panel Status Hides or shows the Status panel Help menu About displays the About dialog box which shows the software version number Check for updates contacts the NEC Display Solutions website and checks to see if a newer version of NEC Display Wall Calibrator is ava
68. ration time slightly and the Intensity may drift slightly after being adjusted Because the range of the Brightness control is limited any additional adjustments necessary to achieve the target Intensity are done using the internal LUTs e Leave Brightness Control at Maximum The Brightness control on the display is set to the maximum value and any adjustments necessary to achieve the target Intensity are done using the internal LUTs This may give a slightly lower calibrated Contrast Ratio and the display power consumption will always highest The calibration time is fastest for this method e Do not adjust Brightness Control The Brightness control on the display will not be adjusted from the current setting Any adjustments necessary to achieve the target Intensity are done using the internal LUTs if possible This option allows the Brightness to be manually adjusted before calibration if necessary Since the Brightness control is not adjusted the Intensity can not be increased if necessary during calibration Extended luminance stabilization time Increases the waiting time for the display to stabilize while the luminance is being adjusted by using the Brightness control This option can be used if necessary to increase the accuracy of the luminance adjustment when a Target with a Specific Level of Intensity is being used It may significantly increase the calibration time and is normally only useful when a very low intensity value is used T
69. ry selecting this option if the Intensity measured after calibration is significantly different than the Target value due to the display stabilizing during the calibration and profiling steps 34 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Preferences dialog Interface tab G3 NEC Display Wall Calibrator Preferences Calibration Sensor Calibration Interface Luminance Units Candelas Foot Lamberts Luminance Units Selects the units that luminance values are displayed in Options are e Candelas cd m e Foot Lamberts fL NEC DISPLAY WALL CALIBRATOR USER S GUIDE 35 Panels Various Panels are available within the main window for controlling the operation of the software and for setting and viewing the status of various settings Panels can be closed either by selecting them from the View menu or clicking the close icon on each panel Panels can also be rearranged and even moved outside of the main window if desired by dragging the title bar of the panel The functions of each panel are described in detail below Actions panel This panel is used to perform the major operations in the application The various buttons will be disabled and enabled depending on the stage of the calibration process Generally operations for calibrating the display are done in the same order as the buttons Initialize All i Verify All This will attempt to communicate with each display in the layout in order Measure S
70. s may not be adjusted correctly by the display A sample test pattern is installed with the software and should be displayed full screen on the video source input Analog Auto Bias Gain Setup will measure the incoming analog video signal and automatically set the video level bias and gain controls in the display This operation should be performed if there is a color tint on black video after the display has been calibrated Note It is essential that when this operation is performed a color bar test pattern video signal is input otherwise the controls may not be adjusted correctly by the display A sample test pattern is installed with the software and should be displayed full screen on the video source input NEC DISPLAY WALL CALIBRATOR USER S GUIDE 43 Display Settings dialog Calibration tab W Display Settings Fower Clock Input wideo Calibration Status Apply calibration Settings to other video inputs _ RGE 3 BNC C RGB 1 DVI D C HOMI ideo 1 RCA _ video 2 BNC S video C Tuner 1 ATV Apply Apply bo Selected Display COM3 ID 1 All Displays i Display Settings Power Clock Input Video Calibration Skatus Operating Hours 221 0 Fan 1 Gn Fan 2 Qn Fan 3 Off Temperature Sensor 1 55 0 C 151 0 F Temperature Sensor 2 54 0 C 129 2 F Temperature Sensor 3 43 0 C 109 4 F Diagnostics Normal Apply to Selec
71. sure that the IP address of each display is set correctly and that each display has a unique IP address e Make sure that the IP address assigned to each display matches those assigned in the software e Make sure that no other device on the LAN is assigned the same IP address e The IP address of each display must be configured using a web browser The default IP address is 192 168 0 10 e Make sure that the displays are on the same subnet as the host PC being used e Make sure that there are no firewall settings or antivirus applications that may be preventing the application from accessing the LAN 50 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Calibration Problem When switching to different video inputs the displays no longer match Solution Each video input can have its own settings for various controls such as Brightness Gamma Se lection Picture Mode etc During calibration the settings for the currently selected video input are automatically configured However if other video inputs are going to be used as well with the video wall then the settings for those inputs will need to be correctly configured to use the calibrated settings Use the Calibration tab on the Display Settings dialog to apply the calibration settings to other video inputs Problem When showing the Calibrated Test Pattern the displays in the video wall match However when an analog video signal is shown they no longer match Solution Differences in
72. te points on all displays If a display can not achieve the specified value it will be calibrated to the closest possible Intensity and a warning icon will be displayed after the calibration has completed Use this option if your application requires a specific luminance but keep in mind that each display must actually be capable of achieving that value NEC DISPLAY WALL CALIBRATOR USER S GUIDE 29 White Point White Point selects the Target white point for the calibration Several popular industry standard White Point values such as 9300K and D65 are provided White Point A custom white point can be specified by clicking the Edit IS button to open up the Custom Color Temperature dialog E a rca canine If the absolute highest possible Intensity is needed for an CIE xy 20 3127 y 0 3290 application and the White Point does not need to be a particular i value then the Calculate Highest Intensity White Point function can be used to calculate the White Point that gives the Calculates the White Point that will give the highest highest overall Intensity This White Point value is calculated possible overall Intensity Displays must First be eae E E abe eaiulccecl from the native or un calibrated measurements taken from all of the displays so all displays should be measured before using this function Clicking the Calculate Highest Intensity White Point button will update the current White Point with the calculated v
73. ted Display COM3 ID 1 w All Displays The Calibration tab is used to apply the various calibration settings to video inputs other than the input that was selected when the display was calibrated Each video input can have its own settings for various controls such as Brightness Gamma Selection Picture Mode etc During calibration the settings for the currently selected video input are automatically configured However if at some point in time other types of video inputs will be used with the video wall then the settings for those inputs will need to be correctly configured to use the calibrated settings Select the video inputs to apply the calibrated settings to and click the Apply button The Status tab reports various aspects about the currently selected display This feature is not available when All Displays is selected Operating Hours Shows the number of hours that the currently selected display has been in operation Fan 1 2 and 3 Shows the current operating status of the internal cooling fans of the display On Off and Error conditions are reported Temperature Sensor 1 2 and 3 Shows the current internal temperature sensor readings of the display Diagnostics Shows the diagnostic condition reported by the display as well as various failure conditions such as power supply fan and temperature abnormalities 44 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Summary window Th
74. the LAN IP address 192 168 0 2 of Display 3 even though it is connected to Display 3 via RS232 Connection Summary Port ID Model S N Status 1 192 168 0 1 1 Not verified 2 192 168 0 1 2 Not verified 3 192 168 0 2 1 Not verified 4 197 168 0 2 2 Not verified La NEC DISPLAY WALL CALIBRATOR USER S GUIDE 21 Configuring a Layout with the Layout Wizard The Layout Wizard is accessed from the Edit menu and will guide you through the initial layout configuration for the video wall After the wizard is completed changes to the configuration settings for individual displays can be made if necessary using the Connection panel 9 Display Layout Configuration Wizard Introduction This wizard will help you configure the video wall ee On the Following pages you will be able to enter the size of the video wall layout and also the communications settings For the displays Settings For individual displays can be configured later Click Next bo continue In the following configuration example a 3x2 video wall that uses a LAN connection for communications to the first display and daisy chained RS232 from that display to the remaining 5 displays W Display Layout Configuration Wizard Specify the size of the video wall Select the size of the video wall in rows height in displays and columns width in displays Layout 3 columns by jz iS a E BDA Ai T
75. the analog video signal level between displays may cause the displays not to match The Auto Setup operation should be performed on each display which will measure the incoming analog video and automatically set the video level controls in the display This operation may need to be performed each time a new analog video signal is connected or if a major change was made to the video wiring to the display or a video amplifier or splitter was added to the video source Auto Setup can be accessed from the OSD on each display or by using the Video tab in the Display Settings dialog available from the Edit menu Note This adjustment process requires specific patterns to be displayed on the video signal in order for the display to automatically adjust the video signal levels correctly Failure to display the correct signal may result in the video levels being incorrectly set and the displays may not match in color when using an analog video source Problem Error No reply from the display message is shown during the calibration when using a USB to RS232 adapter Solution Certain models of USB to RS232 adapters may not function correctly with NEC Display Wall Calibrator and may cause an Error No reply from the display message during the calibration process The display will be detected correctly but the calibration will fail at a certain point This issue is caused by an incompatibility with the USB to RS232 adapter and drivers that c
76. y Settings dialog Status tab Summary window Menus File menu Edit menu View menu Help menu Quick Start to NEC Display Wall Calibrator Frequently Asked Questions Calibration oe Troubleshooting Installation and Setup Calibration Color Sensor Assigning an IP address Glossary 41 42 42 43 43 44 45 45 45 45 45 46 48 48 49 49 50 01 52 54 6 NEC DISPLAY WALL CALIBRATOR USER S GUIDE Precautions e The LCD display monitor screen is fragile and can be easily damaged if force is applied Even slight forces applied to the screen can cause temporary color distortions that can impact the calibration process e Never use suction cups to attach a color sensor to the display e Always use the supplied cable or sling and counterweight to gently rest the color sensor on the face of the display or hold gently and steadily against the screen surface by hand using the minimum possible force e Always try and position the color sensor in the center of the screen when taking measurements or calibrating e During the display calibration procedure highly sensitive light measurements are made on the screen using the color sensor High ambient light levels such as direct sunlight on the screen may affect measurements and cause an inaccurate display calibration Changes in ambient lighting can alter how images on the screen are perceived e Always store the c
77. y radiator color temperature in Kelvin represents the light given off by an object known as a blackbody as it is heated to a given temperature Low color temperatures such as 2500K are reddish while higher color temperatures such as 9300K are bluish A color temperature of 6500K is considered to be neutral white A CIE Standard Illuminant is a defined white color based on a known light source In NEC Display Wall Calibrator the D or Daylight Illuminant series can be used to specify a white point Daylight Illuminants are named according to their corresponding correlated color temperature For example D50 is very close in color to a 5000K blackbody radiator Since adjusting the White Point away from the native value of the display involves reducing the level of at least one color red green or blue the brightest possible display will be when least amount of correction is made Choosing a White Point that is very different from the native White Point will mean that a large correction must be applied and the maximum brightness will be impacted If the application the video wall is being used for does not need a specific White Point and the brightest possible display is required a White Point that will achieve the highest possible overall Intensity after calibrating can be automatically calculated This calculation factors in the native Intensity and White Points of each display in order to determine the resulting White Point This functi

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