The QXGA, or Quad eXtended Graphics Array, display standard is a resolution standard in display technology. Their high pixel counts and heavy display hardware requirements mean that there are currently few CRT and LCD monitors which have pixel counts at these levels. These terms are currently relegated to the highest-end consumer computer display hardware for those buying LCD.

WQXGA is often found in 30" displays like the Dell 3008WFP and the Apple Cinema Display. As of this date, there are few WQUXGA displays in the consumer marketplace, but their price is higher than most displays used by graphic professionals, and their refresh speed is not close to that used in current consumer displays. It is unlikely that WQUXGA or next-generation, HXGA, displays will be commonplace anytime soon. It should also be noted, however, that many standard 21" / 22" CRT monitors can be used at the QXGA resolution.Some of the highest-end 19" CRTs also support this resolution.


QXGA (Quad eXtended Graphics Array) is a display resolution of 2048×1536 pixels with a 4:3 aspect ratio. The name comes from the fact that it has four times as many pixels as an XGA display. As of 2007, this is the highest non-experimental and non-widescreen resolution, and the number of monitors that can display images at this resolution are somewhat limited, especially among LCDs. The number of CRT monitors offering this resolution has actually dropped off, as CRT makers such as NEC and Sony have stopped offering their higher end models. Examples of LCDs with this resolution are the IBM T210 and the Eizo G33 and R31 screens, but in CRT monitors this resolution is much more common; some examples include the ViewSonic G225fB, NEC FP2141SB or Mitsubishi DP2070SB, Iiyama Vision Master Pro 514, and Dell and HP P1230. Of these monitors, none is still in production. A related display size is WQXGA, which is a wide screen version. CRTs offer a way to achieve QXGA cheaply. Models like the Mitsubishi Diamond Pro 2045U and IBM ThinkVision C220P retailed for around 200 USD, and even higher performance ones like the ViewSonic PerfectFlat P220fB remained under 500 USD. As recently as last year, many off-lease P1230s could be found on eBay for under 150 USD. The LCDs with WQXGA or QXGA resolution typically cost 4 to 5 times more for the same resolution. IDTech manufactured a 15" QXGA IPS panel, which could be used in laptops, such as the ThinkPad R-series, but it was never sold as a standard option with any laptop.


WQXGA (Wide Quad eXtended Graphics Array) is a display resolution of 2560×1600 pixels with a aspect ratio. The name comes from the fact that it is a wide version of QXGA, which in turn has four times as many pixels as an XGA display. Prior to 2007, devices that could display this resolution were very rare, but most manufacturers have since came out with a 27"-30" model that was capable of WQXGA, albeit far more expensively than lower resolution LCD TVs of the same size. Several mainstream WQXGA monitors are available with 30 inch displays, such as the Apple Cinema Display, the Dell UltraSharp 3007WFP-HC and 3008WFP, the Hewlett-Packard LP3065, the Gateway XHD3000, and the Samsung 305T. (In marketing materials, Dell expands the abbreviation to "Wide Quantum Extended Graphics Array.") Specialist manufacturers like Planar Systems, Barco (LC-3001) and possibly others offer similar models.

One feature which is currently unique to the 30" WQXGA monitors are their ability to function as the centerpiece & main display of a three-monitor array of complementary aspect ratios, with two 1600x1200 20" monitors turned vertically on either side. The resolutions are equal, and the size of the 1600 resolution edges(if the manufacturer is honest) is within a tenth of an inch, presenting a "picture window view" without the extreme lateral dimensions, small central panel, asymmetry, resolution differences, or dimensional difference of other three-monitor combinations. The resulting 4960x1600 composite image has a 3.1:1 aspect ratio.


QSXGA (Quad Super Extended Graphics Array) is a display resolution of 2560×2048 pixels with a 5:4 aspect ratio. Grayscale monitors with a 2560×2048 resolution, primarily for medical use, are available from Planar Systems (Dome E5), Eizo (Radiforce G51), Barco (Nio 5MP), WIDEdn (IF2105MP), IDTech (IAQS80F) and possibly others.


WQSXGA (Wide Quad Super Extended Graphics Array) describes a display standard that can support a resolution up to 3200 x 2048 pixels, assuming a 1.56:1 (25:16) aspect ratio. As of July 2008, the Coronis Fusion 6MP DL by Barco supports 3280 x 2048.


QUXGA (Quad Ultra Extended Graphics Array) describes a display standard that can support a resolution up to 3200 x 2400 pixels, assuming a 4:3 aspect ratio. As of mid 2007, no monitor natively capable of this resolution is available.


WQUXGA (Wide Quad Ultra Extended Graphics Array) describes a display standard that can support a resolution up to 3840 x 2400 pixels, assuming a 16:10 aspect ratio.

This resolution is exactly four times 1920x1200 (in pixels) and was released as a product in June 2001 by an IBM display panel built into the IBM T220 LCD monitor, IBM T221 (models DG1, DG3, DG4, DG5), Iiyama AQU5611DTBK, ViewSonic VP2290b [ [http://www.viewsonic.com/companyinfo/pressrelease_detail.cfm?key_press_release=155 ViewSonic: Company Info: Press Center: Press Releases ] ] , ADTX MD22292B and IDTech MD22292 (models B0, B1, B2, B5, C0, C2; all other brands are in fact relabeled IDTech models, IDTech does not sell these monitors [ [http://www.idtech.co.jp/en/920LCD/how2buy.html About Purchase of the Ultra High-Resolution and Ultra High-Density LCD Monitor ] ] ). Most display cards with a DVI connector are capable of supporting the 3840x2400 resolution. However, the maximum refresh rate will be limited by the number of DVI links that are connected to the monitor. 1, 2, or 4 DVI connectors are used to drive the monitor using various tile configurations. Only the IBM T221-DG5 and IDTech MD22292B5 support the use of dual-link DVI ports using an external converter box.

Most systems using these monitors use at least 2 DVI connectors to send video to the monitor. These DVI connectors can be from the same graphics card, different graphics cards, or even different computers. Motion across the tile boundary(ies) can show tearing if the graphics card(s) are not synchronized. The display panel can be updated at a speed between 0Hz and 41Hz (48Hz for the IBM T221-DG5, and IDTech MD22292B5). The refresh rate of the video signal can be higher than 41Hz, or 48Hz, but the monitor will not update the display any faster if graphics card(s) do so.

As of January 2007 none of the WQUXGA monitors (IBM, ViewSonic, Iiyama, ADTX) are in production anymore. The highest-resolution color displays on sale are WQXGA. However, Eyevis produce a 56" LCD named EYELCD 56 QUAD HD which can deliver 3840x2160 [http://www.eyevis.fr/?suite=1195251565&page=actualites&type=1&un=1] .

Toshiba will be producing a new WQUXGA 22 inch monitor in the second quarter of 2008. [ [http://www.toshiba-sol.co.jp/news/detail/071101-2.htm 東芝ソリューション株式会社|ニュース|2007年11月1日 ] ]

Comparison chart


External links

* [http://www.eyevis.de/eyevis%20HP%20NEU%20Okt%2007_EN/index.php?action=lcd5600 eyevis Quad HD LC display]

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