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Benq G900WA

1. TFT Slow 30 ms undesired direction which provides excellent contrast ratios and a saturated black level For this reason IPS panels require a stronger back light in order to achieve the desired light output Super IPS is a further development of the technology and pro Fast 2 ms vides better viewing angles Response time Resolution native physical The resolution tells you how many pixels the monitor has horizontally per row and vertically per column Every monitor is designed for a particular native resolution If the resolution of the image signal is different from this native resolution the monitor must scale the image If for example a resolution of 800 x 600 is to be displayed on a monitor with a native resolution of 1 024 x 768 every horizontal pixel has to represent 1 28 pixels As this is impossible interim values are generated This can result in a less sharp image For 17 inch and 19 inch displays a resolution of 1 280 x 1 024 is standard For 20 inch monitors with a 4 3 aspect ratio the standard resolution is 1 600 x 1 200 20 inch moni tors in a widescreen format 16 9 and 16 10 are becoming increasingly popular With a 1 680 x 1 050 resolution two standard A4 page layouts can be shown simultaneously and large Excel tables can be perfectly displayed without scrolling Modern LCD televisions operate with a wide format 16 9 HDTV resolution of F U L L H D 1 080 pixels 1 920 x 1 080 The first
2. N Native resolution 7 P Pixel fault classes 13 Pixel faults 13 Polarising film 352 eiesdes dees 6 Polarising filter 6 R Response TMC rsesrsssrsesnri 8 9 Reflection classes 13 Resolution 7 8 13 S SENSE VE asrori tirria 9 10 SUD DIKel E sean 13 DO VIdCO wasueenurieserstesees 11 T TCO ve ccatinneseausiteessaet As 12 TN Patel 25 053 aces restueed ie 7 T V Ergonomics 12 WW GS speaou cascceeecanes 12 V Vertical alignment 7 NIG PEE seaneasesanes 10 Viewing angle 73812 13 Viewing angle classes 8 Viewing direction classes 13 Vista T E E EE 11 BenQ Austria GmbH Anton Baumgartner Stra e 125 1 3 1 1230 Wien Tel 43 1 667 00 33 0 Fax 43 1 667 00 33 98 E mail Info BenQ at BenQ at BenQ Nordic AB Box 7101 Mattbandsvagen 12 187 12 T by Sweden Tel 46 8 58898802 Fax 46 8 58898899 BenQ se Copyright Brochure subject to technical modifications and errors All rights reserved in particular that of mechanical electronic or photographic repro duction storing and processing in electronic systems Internet dissemination reprinting in magazines or newspapers public lectures film ing or dramatisation radio television or video broadcasting even of individual text and picture excerpts All brands and product names in this document are tr
3. image processing Senseye separates the incoming colour signals in order to adjust each colour individually The result is a perfect image Along with colour bril liance Senseye optimises brightness the contrast ratio and image sharpness Senseye also offers optimum user friendliness The user can select a pre set mode for the desired application e g movies or gaming and the Senseye technology adjusts all other set tings automatically At BenQ we are permanently working on further developments of Senseye technology for improving image quality New Senseye photo technology therefore offers an additional sRGB colour mode which precisely adjusts colour temperature and the gamma value to suit the parameters of the sRGB colour space This ensures that the colours can consistently be reproduced on different peripheral appliances such as digital cameras and printers 10 Senseye game technology offers two new operating modes Action Game Mode and a Racing Game Mode which optimise image quality for applications with fast moving senseye game image content Colours brightness and contrast are adjusted to provide perfect image quality and thus optimum gaming pleasure VGA D sub port analogue As with conventional CRT displays LC displays have a D sub port or VGA port as a general standard It consists of a 15 pin D subminiature connector With analogue VGA signal transmission the digital image signal produced by
4. For a clear view Monitor technology guide Beno Enjoyment Matters e gt ee t t O Pee vee E wf amp 8 6 BE Setting standards The BenQ Group is one of the largest global manufacturers of high quality moni tors and innovative liquid crystal displays BenQ manages the complete manufacturing process which is carried out in house from research and development to the production of individual components and final assembly Important technologies are developed refined and tested again and again before they are finally used in BenQ displays In this brochure we want to share some of the experience that we have gained over the years with you providing you with a basis for making a well informed purchasing decision lm 2 ein j a 3 amp gt s ae Var pS i s 4 er O amp oa O a Yit hi Sd a e a we oa o e t lad a Table of contents The liquid crystal display how it works The LCD principle LCD technology Panel types IPS panel Super IPS Resolution native physical Important LCD variables 8 Viewing angle Contrast ratio Response time Black to Black and Gray to Gray response time Technologies Advanced Motion Accelerator Senseye technology PO ece a 10 VGA D sub port analogue 10 DVI port digital wsi veneiadedsas 10 DDED aerar ranie 10 2 VAAN ao eee esas S 10 HOMI P
5. ademarks registered trademarks of the respective manufacturer Windows Vista and the Windows Vista logo are trademarks or registered trademarks of Microsoft Corporation in the United States and or other countries HDMI the HDMI logo and High Definition Multimedia Interface are trademarks or regis tered trademarks of HDMI Licensing LLC As of 05 2008 Information on this publication available from BenQ Europe B V www BenQ eu com BenQ Benelux B V Saturnusstraat 25G 2132 HB Hoofddorp The Netherlands Tel 31 23 7990 800 Fax 31 23 7990 899 E mail Info BenQ nl BenQ nl BenQ Schweiz AG Riedstrafe 1 8953 Dietikon Tel 41 44 743 99 99 Fax 41 44 743 99 00 E mail Info ch BenQ com BenQ ch BenQ Deutschland GmbH Gro e Elbstrafe 39 22767 Hamburg Tel 49 40 822 264 0 Fax 49 40 822 264 288 E mail Info de BenQ com BenQ de BenQ UK Ltd South Wing 3rd Floor One Park Lane Hemel Hempstead United Kingdom HP2 4YJ Tel 44 870 850 4417 Fax 44 870 850 4418 BenQ co uk 15
6. andards are maintained by employing random testing 1 TUV Technical Control Board Web FERATE Important criteria for evaluating LC displays e Display luminance e Contrast e Reflection e Uniformity of luminance and colours e Font analysis e Pixel fault class Screen flicker Viewing direction classification ISO 13406 2 includes a definition of viewing direction classes These classes relate to whether an individual user is viewing the screen from the front class IV for example or whether several people can see the display from different angles class I Reflection classification ISO 13406 2 also takes into account the reflection properties of flat screen displays This is particularly important in very bright and well lit environments as acceptable image quality should still be able to be achieved in such surroundings The standard thus defines three quality classes The wording of the standard is however not very precise 1 Generally suitable for office environments indicates that the monitor can also be used in difficult circumstances such as at workstations very close to windows 2 Mostly suitable for office environments suitable for most office environments if workplace ergonomics are taken into account when the monitor is set up 3 Suitable for office environments with controlled luminance suitable for rooms without windows or with indirect daylight for example Pix
7. applied the liquid crystal molecules between the two perpendicular polarising layers are forced into a helical structure The light follows this alignment and is rotated 90 The second polarising filter only allows light to pass through with this rotated polarisation The light valve is thus open and as a result the activated pixel lights up Backlight Z Polarising filter Glass substrate Electrodes Alignment layer Liquid crystals Colour filter Polarising filter Alignment layer 0 filter If an electrical voltage is applied however the liquid crystal molecules align themselves parallel to the electric field The 90 helix is reversed and the liquid crystal molecules are parallel to the incoming light and let it pass through the layer without altering the direc tion of polarisation The non rotated beam of light meets the second rotated polarising filter and cannot pass through As a consequence the corresponding pixel remains dark By altering the voltage applied to the crystal layer and subsequently causing the polarised light to be more or less rotated the strength of the visible light produced can be regu lated The voltage is maintained so the image does not constantly have to be reassembled This is the main advantage of LCD technology the picture doesn t flicker even when it is activated by low frequency currents e g 60 Hz 2 D z 8 gt Currently t
8. computer monitors with a screen diago nal of 24 inches and higher already support this resolution This is important 1 0 8 0 P because of the increasing convergence between IT hardware and traditional elec tronic entertainment systems Viewing angle The viewing angle defines the monitor s field of view Technically this value is deter mined by measuring the contrast ratio across the viewing field until it falls short of a particular value normally 10 1 Some companies use a benchmark value of 5 1 in order to achieve better results This doesn t allow true comparison of values as it is a deliber ate falsification Certification in accordance with ISO 13406 2 offers clarification as it prescribes categorisation into viewing angle classes and the use of a defined measurement procedure Ergonomic requirements for the workplace define a minimum horizontal viewing angle of 60 60 right left and a vertical viewing angle of 45 45 up down If only two values are given for horizontal and vertical viewing angles the values for right and left and up and down respectively have been added together In this case for exam ple a viewing angle of 120 horizontal and 90 vertical would be given Contrast ratio The contrast ratio is the relationship between the brightness of the brightest and the darkest pixels in an image High contrast ratios improve legibility and ergonomic quali ties A display should always achieve contrast values o
9. el fault classification With respect to pixel defects a new standard ensures transparency by establishing pixel fault classes These must be indicated in the technical specifications provided with the appliance In adhering to this standard the manufacturers are obliged not to exceed established pixel fault quotas in series production Fault class Type 1 Dype 25 liye sms I 0 0 0 II 2 25 5 MI a 15 50 IV 50 150 500 Fault class Resolution Number of pixels Type 1 Typen ypesa ce II 1 024 x 768 786 432 2 1 579 Per million pixels Illuminated pixels white Dark pixels black H2 E g defect red green or blue sub pixel always lit or unlit One LCD pixel consists of three red green and blue sub pixels 13 14 A AMAA E eee ET OA 9 B BPE E TA 6 Back Neier sere 7 Brightness ORT 12 C ci 8 CIM Ms ccencnt Te 12 Colour filter 6 COMMONS ETETE 11 Contraste EEE ERE 7 8 Conversion losses 10 11 eo sz 11 D Docu oo e A 10 DM oo oe ae 10 E kocoran ti J i 12 F Flicker free 0 11 H 0D 9 9 dill rrr 10 HDTV sc ceeveesenesioanwonss 8 I WP EE vee eee eee sees 7 ISO 13406 2 8 12 13 ISO 9241 3 7 8 0 0 ec eee 12 L OD peers ceases 5 once 6 8 LCD principles isssaceneoeas 6 Liquid Crystal cssctesdeeciasss 6 M Multi domain 7 MVA PANE ssc ccsceheeesoueus 7
10. ertificates listed below give you the assurance you need in terms of ergonomics product safety and environmental compatibility Important standards and certificates Vista Basic The Vista Basic logo indicates that a monitor is fully compatible with this operating system This means it must be possible to download the necessary driver software for example The Vista Basic logo ensures that installation will be problem free and guar antees stable operation of the monitor Vista Premium The Vista Premium logo entails further requirements to be fulfilled in addition to the basic certificate The monitor must have a digital interface for example This rules out conversion losses during signal transmission from the computer to the monitor In addition higher standards of colour fidelity for image reproduction are required in accordance with the Windows standard The monitor settings must also be able to be adjusted using the computer through the DDC Display Data Channel command interface TCO 06 Sets particularly high standards of colour fidelity brightness levels and uniform illumination These factors are very important for image quality for applications with fast moving animation TCO 03 Quality seal from Sweden defining strict ergonomic and environmental com patibility standards TCO 03 as of 2003 ISO 13406 2 Ergonomic requirements laid down by the International Standards Organ ization ISO relating to image qual
11. f 500 1 In this respect liquid crystal displays are significantly superior to conventional CRT displays as a good CRT display would only offer a ratio of 90 1 Brightness Brightness is the light emitted on a particular surface Compared with conventional CRT displays LCD monitors offer superior brightness CRT displays offer only approx 80 to 100 cd m candela per square metre whilst values under 250 cd m for liquid crystal monitors are considered unacceptable and are only found on outdated displays Response time The response time is the time a TFT cell requires to change its colour When pixel re sponse times are too long some lower performance displays produce ghosting or streaming effects on the screen when the image content is in motion For standard applications maximum response times of 8 ms are sufficient For applications with fast moving animations such as films games and video editing faster image formation is required The response time should not be more than 4 ms Advanced Motion Accelerator a senseye Human vision technology senseye photo Black to Black and Gray to Gray response times The current ISO standard uses the Black to Black response time which measures how many milliseconds a pixel requires to go from black to white and back to black again However this information only has limited relevance In practice colour intensive films and action games hardly contain b
12. hree different types of panel are used for flat screen displays TN MVA and IPS panels They offer different levels of performance principally in terms of the response time viewing angle and contrast ratio TN panel TN stands for twisted nematic The combination of a special liquid crystal chemistry and intelligent control electronics provides the fastest pixel response times and high contrast ratios and brightness values To increase the viewing angle a film is affixed to the surface of the TFT Thin Film Transistor this is known as TN film MVA panel MVA stands for multi vertical alignment When no voltage is applied the crystals align themselves vertically The special feature of MVA panels is that every pixel is di vided into several domains The M stands for multi domain The pixels are aligned at an oblique angle to one another This ensures the light output is maintained The contrast ratio and colour display remain constant MVA pixels respond considerably more quickly than IPS pixels On the other hand the black level is not as dark as with IPS technology IPS panel Super IPS IPS stands for in plane switching With this technology the liquid crystals lie parallel to the display surface when voltage is applied When no voltage is applied they align themselves at a right angle to the surface The crystals thus form very homogenous Seay structures and ensure that almost no light leaves the panel in an
13. ity for flat screen displays T V Ergonomics Defines high ergonomic requirements including safety standards and low radiation TUV GS Safety tested in accordance with work and operating safety guidelines and ergo nomic requirements for visual display terminals under ISO 9241 3 CE mark Manufacturer s declaration in accordance with EU guidelines relating to prod uct safety and electromagnetic compatibility Energy Star An energy saving seal of approval established by the EU and the USA for office appliances which operate with high energy efficiency Important quality criteria ISO 13406 2 is the testing standard used for the TUV Ergonomics inspection and involves controlling the ergonomic properties of display screens ISO 13406 2 has been specially developed for the assessment of liquid crystal displays whilst ISO 9241 3 7 8 relates to CRT displays TCO seal The TCO seal is awarded by the Swedish employees trade union Tjanstemannes Central Organisation and has become a general standard for display screens TCO 99 and TCO 03 are currently established The numbers indicate the year the standard first appeared TCO 99 regulates particular quality standards such as viewing angle and contrast TCO 03 a stricter standard dating from 2003 also lays down particular environmental and radiation standards Harmful substances such as cadmium and lead were banned from monitors The Swedish trade union guarantees that quality st
14. lack to white changes New panels designed to have optimum Gray to Gray pixel response times fulfil the requirements for such ap plications Currently a new standard is therefore being established which entails an in dication of the Gray to Gray response time in milliseconds This measures how long a pixel requires to pass through different shades of gray Z 2 Z Z R G amp R Gray to Gray Gray to Gray Gray to Gray Gray to Gray Gray to Gray Advanced Motion Accelerator For applications such as films and computer games fast pixel response times are the most important variable see Response time for more information Advanced Mo tion Accelerator AMA technology provides fast response times By improving the liquid properties of the liquid crystals and optimising the electronic systems pixels can quickly attain the desired position The intelligent and dynamic AMA function doesn t only use a simple overdrive of the electrical voltage like conventional systems The im age signal is analysed in real time and then controlled with an optimum voltage us ing the AMA circuit This has the advantage of achieving precisely the desired colour value without overloading the pixels These technologies are offered exclusively by AU Optronics a subsidiary of BenQ Senseye technology BenQ Senseye technology provides dynamic optimisation of image quality Unlike con ventional
15. otts onc 20eesacesescess lt 10 Video port CVBS or composite 11 S video POL dtesseesecesveussacaes 11 Ergonomics and safety 11 Important standards and CEMINCALCS once te ceed hne 11 ISO 13406 2 12 Important quality criteria 2 TOCO Seal seners sesia eir 12 Viewing direction classification 13 Reflection classification 13 Pixel Fault classification 13 tit E 14 15 The LCD principle Liquid crystal displays function thanks to the particular physi cal characteristics of liquid crystals The rod shaped molecules always arrange themselves evenly and in a particular direc tion like the molecules of crystals Liquid crystals are not frozen in that pattern however and behave like a liquid When an electrical voltage is applied they can be manipu lated The layers of the liquid crystal molecule can either stand horizontal or vertical to the polarisation direction of the light which has different effects on the progress of light waves In simple terms the LCD principle operates like a light valve that can be controlled by an electrical voltage LCD technology A liquid crystal display consists of two polarising filters an alignment layer colour filters and a liquid crystal layer The light from a background lamp meets the first polarising film allowing only certain wavelengths of light to pass through to the liquid crystal layer Without any electri cal voltage
16. particular advantage of this interface is the simplifica tion of the wiring allowing for example the wiring in series of individual devices ine HDMI plug Lf Sta Ain Video port CVBS or composite The interface known as CVBS colour video blank and sync or composite is stand ard for VHS and analogue TV Colour and brightness signals as well as synchronising signals are combined and then transmitted Cinch connectors and SCART connectors used for video recorders and televisions have become the standard connectors for the transmission of CVBS video signals If a flat screen display has a video port a video picture signal from a DVD player for example can be directly displayed on the screen without a PC In terms of quality a composite signal does not provide the best video signal Fuzzy contours and so called cross colour effects may appear S video port The S video port offers better image quality because it transmits brightness luminance and colour chroma separately from one another In terms of quality the output image from the S video connection is similar to the image provided by RGB transmission with a VGA port Low quality displays or displays used incorrectly can quickly lead to user fatigue High contrast ratios and brightness values along with a constant light density and no flick ering affect both ergonomic properties and image quality A monitor should be low radiation and free of toxins The c
17. the computer is converted into an analogue signal by the graphics card This is an advantage for CRT displays as they can only process analogue signals For digital LC displays however this is not ideal If a digital LC display receives analogue signals a transducer has to convert the analogue input signal back into a digital signal This leads to conversion losses and lower image quality This is why almost all BenQ LC displays also have a digital DVI port see DVI port DVI port digital If a display is connected to the computer by an analogue VGA D sub port it can result in lower quality images The digital signal of the computer is converted into an analogue signal before transmission and then back into a digital signal in the monitor Using DVI purely digital transmission means that no conversion of the signal is necessary so opti mum picture quality is guaranteed 1 DVI D This is a purely digital interface This type of connection is becoming standard on liquid crystal displays 2 DVI I DVI I processes both digital and analogue signals With the help of an adapter the display can also be operated by an analogue graphics card unlike DVI D Most graphics cards offer this interface if they are equipped with DVI HDMI port The HDMI port is a digital video interface that was specially developed for HDMI jack the video sector It is a particularly compact interface which also integrates _ HDCP encryption A

Benq G900WA

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