BenQ FP781 User's Manual
Contents
1. the values for right and left and for horizontal and vertical are added together If this were the case then this would provide a viewing angle of 120 horizontally and 90 vertically B Contrast Contrast is the ratio between the light intensity of the brightest and the darkest point of an image High contrast values improve readability and ergonomics A display should in all instances attain contrast values of 100 1 This is a point on which LCD mon itors are clearly superior to monitors C Response time The response time is the time which a TFT cell requires to switch on and switch off For standard applications a response time of a maximum of 70 ms milliseconds is sufficient If a more rapid image build up is required e g the multimedia field then values of a maximum of 30 ms are required D Brightness Brightness is the emitted luminous power over a specified area Brightness is another point on which LCD monitors are superior to CRT devices Traditional monitors create approx 80 to 100 cd m candela per meter square In the case of LC displays values below 150 cm m are not acceptable English 50 Beng LCD Color Monitor User s Guide Display errors A Pixel errors Pixel errors are unfortunately unavoidable with today s production methods if you want to man ufacture displays at an economically sensible price A display with a resolution of 1024x768 dots therefore has 786432 pixels Each pixel consist2. TN oases cas op conc eies EE N rN aa oir A S a aE 38 Troubleshoot sesso ceases ate sae eee ee 45 Frequently Asked Questions FAQ csssssssssssscsssssssccssssssscsssssecescsssesescessececsesecccseseecacees 45 Need M re ICID is csretet colette ieee calendar aie an Atel 46 SUPPOrLEd Operating MOdES iene aca ee eee leet 47 SPECINCALIOINS uar EEA EE NEA E E OEE 48 Appendix An Introduction to LCD Technology esssssesessssessesesssesesesesesesesesesesesesesesosesesese 49 Principles OP ECD Technology moerse oren ear RNA E aae SRRA R 49 The TFI AMON seis cases octets teceectoeeeie eee entertains 49 IMAPOFEAME CGD parameters issii a a hse A E teeta witeas 50 Display Errors uea TENE AE ENEA EAE 5 Comparison of CRT amp ECD MONITO S rennironannrn a a aciesels anencessdataee 52 SUMMAS rea E E OA ERNEA E ee 52 English 2 Beng LCD Color Monitor User s Guide Unpacking Please check you have the following items If they are missing or are damaged please contact the dealer immediately at which you purchased the good LCD monitor with signal cable u co 990 o Quick Start Guide Power cord Power Adaptor English 3 Beng LCD Color Monitor User s Guide Views of the Monitor Front View 1 FP781 n u 00 0000 0 Control key 2 Earphone jack 3 Speaker 4 Microphone English 4 Beng LCD Color Monitor User s Guide Back View 1 Back View 2 Locations of plugs amp so
3. of this is that LC displays do not flicker even when they are controlled at low refresh frequencies e g at 60 Hz Because faulty transistors can occur during production pixel errors resulting from this are unavoidable B The super TFT panel The super TFT panel works according to the same physical principle A significantly increased viewing angle can be created through more precise production and through slightly brighter pixels This however is partly at the expense of the gray level resolution English 49 Beng LCD Color Monitor User s Guide C Comparison of standard and super TFT display good gray level resolution very good viewing angle F satisfactory viewing angle satisfactory gray level resolution Field of applications Field of applications Image processing is several people are working at one screen medical field e Standard workstation e Standard workstation e Presentation tasks Banks confidential area Banks public area Important LCD parameters A Viewing angle The viewing angle is the display s visible field If one were to imagine a vertical line in the centre of the image and to pivot up and down and to the right and to the left from that point then that is the viewing angle tWorking ergonomically requires a viewing angle of at least 60 60 right left hori zontally and 45 45 vertically up down If only two values are specified for horizontal and vertical
4. switch off the monitor interference lines can occur on your screen But do not be con cerned about this as it is normal To extend the service life of the product we recommend that you use your computer s power management function Note The timing is not supported in Digital input DVI D English 47 Beng LCD Color Monitor User s Guide Specifications ne e Display type 17 0 active TFT Viewable diagonal 43 18cm Native maximum resolution 280X1 024 Colors 16 7 million Contrast Brightness 350 1 200cd m Response time 35ms Viewing angle left right up down 80 80 80 80 Line frequency 31 47 81 18 kHzMulti frequency monitor Image checks Digital Screen OSD Technology iKey automatic image setting iKey Input Exit lt gt Enter Controls PIAP Contrast brightness vert amp hor image position phase pixel clock color balance color palette choice of language Input Select Image Size OSD Setting Sta tus indicator Power Management VESA DPMS EPA iScreen functions max power consumption 50 Watt Max Power saving mode lt 3 Watt Input signal Analog RGB analog 0 7 Vpp 75 Ohm positive Digital DVI Digital Visual Interface Standard Rev 1 0 compliance Synchronisation TTL separate signal connection 5 pin mini D sub cable Signal connection Analog I5 pin mini D sub cable Digital 24 pin DVI cable Temperature operating 5 C 40 C Air h
5. Beng FP781 LCD Color Monitor 17 0 43 18 cm LCD Panel Size User s Manual Copyright Disclaimer Safety Instructions Beng LCD Color Monitor User s Guide 2002 Benq Corporation formerly Acer Communications amp Multimedia Inc All rights reserved No part of this publication may be reproduced transmitted transcribed stored in a retrieval sys tem or translated into any language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of Beng Corporation Beng Corporation makes no representations or warranties either expressed or implied with respect to the contents hereof and specifically disclaims any warranties merchantability or fitness for any particular purpose Further Beng Corporation reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Benq Corpo ration to notify any person of such revision or changes mI The AC adapter isolates this equipment from the AC supply Unplug this product from the wall outlet before cleaning Do not use liquid or aerosol clean ers Use a soft cloth to clean the monitor housing and a tape to stick dust and fingerprints on the screen panel Slots and openings on the back or top of the cabinet are provided for ventilation They must not be blocked or covered This product should never be placed ne
6. N There are two items in this sub menu H Horizontal Position adjust the horizontal position of the display z V Vertical Position adjust the vertical position of the display PUSI TION lt gt ENTER ADJUST SELEGT Color Press lt or gt key to select this item and press Enter to enter sub menu Po ra and laa English 40 Beng LCD Color Monitor User s Guide There are three preset modes C1 9300K ES COLOR C2 6500K C3 5800K C2 6s And one user mode 9S00K HAT lt gt EXIT ADJUST In user mode user can adjust Red Green and Blue color Languages Press lt or gt key to select this item and press Enter to enter sub menu sae ra fad laa LANGUAGE ES ein Ji lt 2 ENTER BROWSE SELECT To select OSD language within 6 lan guages DE Deutsch EN English ES Espa ol FR Fran ais IT Italiano JA Japanese Recall Press lt or gt key to select this item and press Enter to enter sub menu wae A fara F gt English 41 Beng LCD Color Monitor User s Guide Press lt or gt key to make decision Select Yes and press Enter to restore 99 factory settings Select No and press RECALL Enter or just press Exit to return to main menu YES NO lt gt ENTER ADJUST SELECT Volume Press lt or gt key to select this item and press Enter to enter sub menu oe ra and
7. U 93 W There are 7 keys for user s control including iKey Input Exit Enter lt and gt key and a power swith The following descriptions are the introduction of these keys amp switch Power Turn the power on or off iKey Adjust vertical position phase horizontal position and pixel clock automatically Input key Select between digital and analog signal sources Exit key Back to main menus save menu or exist OSD menu Enter key Enter sub menus select items or save items lt For Left adjustment Left key is the hot key for Contrast adjustment gt For Right adjustment Right key is the hot key for Brightness adjustment Hot Key Mode Contrast hot key ow eS eS Press lt key to enter the Contrast hot key mode a COMTRAST 2 Press lt or gt key to make adjust ment The scale can be adjusted from a maximum 100 to minimum 0 a lt gt 3 Press the Exit to leave OSD opera y ADJUST tion The adjustment can be auto saved Brightness hot key Press gt key to enter the Brightness hot key mode zE BRIGHTNESS 2 Press lt or gt key to make adjust ment The scale can be adjusted from maximum 100 to minimum 0 3 Press the Exit to leave OSD opera tion The adjustment can be auto saved English 37 Beng LCD Color Monitor User s Guide Vol
8. ar or over a radiator or heat register or in a built in installation unless proper ventilation is provided This product should be operated from the type of power indicated on the marking label If you are not sure of the type of power available consult your dealer or local power company Never push objects of any kind or spill liquid of any kind into this product Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltages or other risks If any above mentioned misuse or other accident dropping mis operations occurs contact qualified service personnel for servicing The power supply cord serves as a power disconnect device for pluggable equipment The socket outlet shall be installed near the equipment and shall be easily accessible English Beng LCD Color Monitor User s Guide MID A CIA sorsra E ae ea adele clea dante tala dei ee eae alee 3 VIG WS Or CMS MOMIC ORS serpan RE EaR ETEEN 4 Contents FONC VIEW I rennara A eee ree ee rete 4 FROME View 2 COMERON Dai Sl iesenii A E 4 Bac K VION I uaan ea EEA EE AE E E ATENE TE 5 Back View 2 Locations of plugs amp sockets eessesesesesesesesesesesesesesesesesesesesesesesesesesesesesesesess 5 Tak 021 Velo a ana a eee ree 6 Hardware Installation arinina nina tee inne Aca te noel T heen 6 SoftWare Installatie samoin A EO 7 Adjusting the Montor sedione ioin aTeo e R AER AIRAS 37 HOCK ey Mode sunei E T A S 37 Mami Mena
9. ckets E 1 2 DVI connector 4 Audio in socket LINE IN 6 DC 12V input socket DCI 2V English 5 Beng LCD Color Monitor User s Guide Installation Hardware Installation A Make sure that the computer and monitor s power are both turned off Please follow the steps to install your LCD monitor Connect the signal cable and power adaptor to Beng LCD monitor 2 Connect the audio cable to the Audio Input of Beng LCD monitor 3 Please connect power cord to power adaptor first and then connect the power adap tor to LCD monitor B Connect the signal cable to the VGA output of the graphics card on the computer C Connect the audio cable to your computer D Connect the power cord at the back of the monitor to an AC power socket Please make sure that the socket is not blocked or covered so you can disconnect the unit from AC supply if you need to Your monitor is equipped with an automatic power sup ply for a voltage range from 100 to 240 Volt at a frequency of 50 to 60 Hz Be sure that your local power is within the supported range If you are unsure ask your electricity supplier Power adaptor Audio cable Audio cable for microphone English 6 Beng LCD Color Monitor User s Guide Adjusting the Monitor A Look at the Control Panel Input Exit lt gt Enter QO 0000 0
10. djustments based on these instructions Y The image is displaced in one direction t Read the chapter Installation Adjustment and then select the correct resolution refresh rate and make adjustments based on these instructions Need More Help If your problems remain after checking this manual please contact your place of purchase or e mail us at DPLservice beng com English 46 Beng LCD Color Monitor User s Guide Supported operating modes Incoming display mode Input timing Multi scan operation Resolution Horizontal Vertical Dot Clock Remark Actual display Frequency Frequency Frequency resolution KHz Hz MHz 1024x768 65 00 1024x768 75 00 1024x768 78 75 1024x768 80 00 1152x864 108 00 1152x870 100 00 1152x900 92 94 1152x900 108 00 1280x1024 108 00 1280x1024 75 83 N 128 00 1280x1024 80 00 P 75 00 P 135 00 1280x1024 81 18 N 76 16 N 135 09 e Modes which are not listed in the above table may not be supported For an optimal picture it is recommended to choose a mode listed in the table You have 22 available modes compatible with Windows It can happen that the image is disrupted This can occur as a result of a signal frequency from the VGA card which does not correspond with the usual standard This is not however an error You can improve this situation by altering an automatic setting or by manually changing the phase setting and the pixel frequency from the Fine Tune menu If you
11. laa D VOLUME Press lt or gt key to adjust volume of speaker and then press Exit to return to main manu Input Select Press lt or gt key to select this item and press Enter to enter sub menu fia Ditty INPUT SELECT lt gt ENTER BROWSE SELECT Press lt or gt key to select between digital and analog signal source Hiimea HPUT2 English 42 Beng LCD Color Monitor User s Guide Image Size Press lt or gt key to select this item and press Enter to enter sub menu BROWSE Press lt or gt key to select between FULL full screen and 1 1 real size OSD Setting Press lt or gt key to select this item ce 99 and press Enter to enter sub menu K mi m psn OSD SETTING ee BROWSE SELECT There are 3 items in this sub menu H Horizontal Position adjust the OSD horizontal position of the display V Vertical Position adjust the OSD vertical position of the display z OSD Time to set the standby time of OSD English 43 Beng LCD Color Monitor User s Guide Info Press lt or gt key to select this item and press Enter to enter sub menu sae ra au F Press Enter to show display information resolution horizontal frequency and vertical frequency Press Exit to return to main menu Contrast Press lt or gt key to select thi
12. limited brightness and contrast val ues only flicker free from 72 Hz sensitive to magnetic and electric fields relatively high power consumption high heat build up larger footprint high weight Summary Flat panel display Advantages no geometry errors no convergence errors excellent brightness and contrast values flicker free insensitive to magnetic and electric fields low power consumption low heat build up small footprint low weight Disadvantages Multi frequency monitor best quality only in its native resolution Absence of standards limited colour depth pixel errors no large proportions expensive Ultimately it cannot be said that LCD monitors are superior to CRT monitors or vice versa either Rather when choosing which device to use you need to weigh up the advantages and disadvantages in order to decide which technology to use In the public and presentational arena LC displays are definitely preferable over CRT monitors In relation to the display workstation order the small footprint is also an important argument and in this respect more favours flat panel displays On the other hand when it comes to particular colour depth or you need a large viewable diagonal the choice of a CRT monitor is still unrivalled English 52
13. n This is also ideal for monitors as they require an analog signal The image digitally created in the computer is converted in the graphics card into an analog signal and thus directly controls a CRT monitor If however you use the analog signal of the VGA connec tion for a digital LC display then transducer electronics at the input of the display must cater for conversion back into digital signals Two problems occur with this conversion losses The image is not so optimal as compared with direct digital control It can otherwise be the case that subsequent adjustments are necessary every couple of months on a regu lar basis This is generally executed via the OSD or an automatic function 2 Limitation to specific operating modes Nowadays A CRT monitor is usually a multiscan monitor which means it can be operated within the limits of its horizontal and vertical frequency even in non standard modes An LCD monitor in contrast is a multi frequency monitor which means it is only guar anteed to work together with specific modes see list in the user s guide English 51 Beng LCD Color Monitor User s Guide Comparison of CRT amp LCD monitors Advantages Multiscan monitor same quality in all resolutions proven connector standard analog infinite colour depth no pixel errors also large proportions inexpensive Disadvantages geometry errors possible convergence errors possible
14. s item and press Enter to enter sub menu sae ra fara laa P CONTRAST aS p lt gt ENTER BROWSE SELECT Press lt or gt key to adjust contrast ratio and then press Exit to return to i main menu D CONTRAST English 44 Beng LCD Color Monitor User s Guide Troubleshooting Frequently Asked Questions FAQ Y The image is blurred t Read the chapter Installation Adjustment and then select the correct resolution refresh rate and make adjustments based on these instructions t Do you use a VGA extension cable Remove the extension cable for the test Is the image now in focus If not optimize the image working on the description in the chapter Installation Adjustment It is normal for blurring to occur due to conduction losses in extension cables You can minimize these losses by using an extension cable with better conduction quality or with a built in booster t Does the blurring only occur at resolutions lower than the native maximum resolution Read the chapter Installation Adjustment Select the native resolution Y Pixel errors can be seen t One of several pixels are permanently black one or more pixels are permanently white one or more pixels are permanently red green blue or another colour Read the chapter Pixel error rates Y Y The image has a faulty colour appearance ts t has a yellow blue or pink appearance On the monitor press the Enter key and use lt or g
15. s of the three sub pixels for red green and blue That makes 2 359 296 individual control transistors It can occur during production that one or several transistors is defective which means that pixel errors occur in which a sub pixel does not light up at all or does so all of the time If you were to accept the same error rate as in the case of the strip mask for which two horizontal lines are completely disrupted then you would end up with a 2 6 percent error rate The accepted error rates for LC displays are far lower however If for example you were to accept a tolerance of three permitted pixel errors per display the you would end up with an error rate of 0 0038 per thousand B Blurred image You can also end up with blurred images with LC displays indeed whenever you depart from the native resolution A display is built for a set resolution smaller resolutions can only be displayed interpolated If for example you want to display a resolution of 800x600 on a display with a native resolution of 1024x768 then each horizontal dot would have to display 1 28 dots of the resolution This doesn t work of course and so intermediate values are calculated and this distorts the original image C Multifrequency as opposed to Multiscan LC displays require a digital control and because currently there is still no valid standard for a digital control for the sake of compatibility there is a tendency to revert to the standard VGA connec tio
16. t key to select RECALL item and press Enter key Press lt or gt key to select YES and press Enter to recall fac tory settings If the image is still not cor rect and the OSD also has a fault colour appearance then one of the three primary colours is missing in the signal input Now check the VGA cable contacts If any pins are bent or broken off then contact your dealer or read the chapter Additional Help Repairs amp Service Y No image can be seen t s the prompt on the display illuminated in green If the LED is illuminated in green then press the Enter button on the monitor to access the On Screen Display If the message Not supported Mode appears there read the chapter Installation Adjustment English 45 Beng LCD Color Monitor User s Guide t s the prompt on the display illuminated in orange If the LED is illuminated in orange then the power management mode is active Press a button on the computer keyboard or move the mouse If that does not help then check the VGA cable contacts If any pins are bent or broken off then contact your dealer or read the chapter Additional Help Repairs amp Service t s the prompt on the display not illuminated at all Check the power supply mains socket the external power supply and the mains switch Y The image is or distorted flashes or flickers t Read the chapter Installation Adjustment and then select the correct resolution refresh rate and make a
17. ume hot key Press Exit key to enter the Voulme hot key mode 2 Press lt or gt key to make adjust ment The scale can be adjusted from maximum 100 to minimum 0 3 Press the Exit to leave OSD opera tion The adjustment can be auto saved Main Menu Mode Control Functions Available in Main Menu Digital mode OSD main menu BRIGHTHESS i ra oy lt gt ENTER BROWSE SELECT Analog mode OSD main menu aie English 38 Brightness Press lt or gt key to select this item and press Enter to enter sub menu Press lt or gt key to adjust brightness and then press Exit to return to main tae a F u menu Fine Tune Press lt or gt key to select this item and press Enter to enter sub menu There are two items in this sub menu Phase adjust the phase of pixel Pixel Clock adjust the frequency of the pixel Benq LCD Color Monitor User s Guide m aie ete p TRA ENTER BROWSE SELECT BRIGHTHESS m LS BMS i lt 3 ENTER BROWSE SELECT PHASE lt gt ENTER ADJUST SELECT English 39 Beng LCD Color Monitor User s Guide Auto Adjust The same function as iKey Bm C AUTO AUTO ADJUST Be Ji ES aS lt gt ENTER BROWSE SELECT Position Press lt or gt key to select this item and press Enter to enter sub menu a ra mai E ia POSITIO
18. umidity operating 20 80 Certifications TCO 99 Optional TUV Ergonomics TUV GS FCC Class B ISO 13406 2 VCCI UL CE C Tick BSMI Operating voltage Dimensions W x H x D Automatic switched mode power supply 90 264 V 47 63Hz 404 6 x 449 6 x 202 1 mm Weight 4 7 kg English 48 Beng LCD Color Monitor User s Guide Appendix An Introduction to LCD Technology Principles of LCD Technology The functionality of LCD Liquid Crystal Display screens is based on the special physical properties of liquid crystals Their rod shaped molecules arrange themselves similarly to the molecules of crystals always uniformly and in one particular direction Yet liquid crystals are not set in this ori entation but behave like a liquid They can be manipulated by applying an electric voltage The lay ers of the liquid crystal molecules can therefore be longitudinal or diagonal to the polarising direction of the light and thereby have a varying effect on the course of light waves LIQUID CRYSTALS POLARISE INCIDENT LIGHT An LC display consists of two polarising filters a control layer the respective colour filters and the liquid crystal layer The light from a background lamp hits an initial polarisation membrane so that only a specific plane of polarisation of the light reaches the liquid crystal layer Without any external electrical influence the liquid crystal molecules arrange themselves in a screw like shape between the two
19. vertically aligned polarising filters and the directional structure imposed as a result The light follows this ori entation and is rotated by 90 degrees The second polarising filter only allows through light with this rotated polarisation The light valve is open as a result the controlled pixel lights up If an electrical voltage is applied the liquid crystal molecules orientate themselves along the field lines The 90 screw is lifted up the LC molecules appear parallel to the incident light and allow it to pass through without altering the polarising direction The unrotated light hits the second rotated polarising filter and is blocked As a result the corresponding pixel remains dark The intensity of the departing visible light can be controlled by means of the voltage applied to the crystal layer and the polarised light rotated to a greater or lesser extent as a result The TFT panel A The standard TFT panel With TFT displays also called active matrix the light transmitting capacity of each pixel is in each case controlled by a transistor The pixels can therefore be operated individually and addressed very quickly which in turn guarantees perfect display even of moving images With high resolution LCDs well over two million pixels three colour dots for the primary colours red green and blue per pixel have to be controlled The voltage is continuously on so that the image does not have to be rebuilt constantly The great advantage
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