QXGA

Encyclopedia : Q : QX : QXG : QXGA

Computer Standard Resolution Ratio Pixels
QXGA 2048×1536 4:3 3.1M
WQXGA 2560×1600 16:10 4.1M
QSXGA 2560×2048 5:4 5.2M
WQSXGA 3200×2048 25:16 6.6M
QUXGA 3200×2400 4:3 7.7M
WQUXGA 3840×2400 16:10 9.2M

The QXGA display standard and its derivatives are relatively new (as of 2005) standards in display technology. Their high pixel counts and heavy display hardware requirements mean that there are currently few monitors which have pixel counts at these levels. These terms are currently relegated to the highest-end consumer computer display hardware. An example of a WQXGA display can be found in the 30" Apple Cinema Display, which requires a Dual Link DVI. As of this date, there are only two 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 some standard 19" monitors can be used at the QXGA resolution by exceeding the factory specifications.

Computer Standard	Resolution	Ratio	Pixels
QXGA	2048×1536	4:3	3.1M
WQXGA	2560×1600	16:10	4.1M
QSXGA	2560×2048	5:4	5.2M
WQSXGA	3200×2048	25:16	6.6M
QUXGA	3200×2400	4:3	7.7M
WQUXGA	3840×2400	16:10	9.2M

Contents

1 QXGA
2 WQXGA
3 QSXGA
4 WQSXGA
5 QUXGA
6 WQUXGA
7 References

QXGA

QXGA (Quad eXtended Graphics Array) is a display resolution of 2048×1536 pixels with a aspect ratio. The name comes from the fact that it has four times as many pixels as an XGA display. As of 2005, this is the highest non-experimental and non-widescreen resolution, and the number of devices that can render images at such high resolution are somewhat limited. A related display size is WQXGA, which is a wide screen version.

WQXGA

WQXGA (Wide Quad eXtended Graphics Array) is a display resolution of roughly 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. As of 2006, there are still very few devices that can render images at such high resolution. The 30" Apple Cinema Display is one such device. Another is the Dell 3007WFP, a 30 inch monitor from Dell, released in January 2006, which will be in direct competition with Apple's high end monitor. (In marketing materials, Dell expands the abbreviation to "Wide Quantum Extended Graphics Array".)

Since XGA displays have a resolution of 1024×768 and QXGA displays have a resolution of 2048×1536, a 2560×1600 display resolution is actually slightly taller than QXGA, in addition to being wider. A resolution of 2560×1536 should, in theory, also qualify as WQXGA, if such a display were to be made. Apple has historically chosen 16:10 aspect ratios for most of its wide screens, even when this has meant opting for slightly higher resolutions than might otherwise be arrived at.

QSXGA

QSXGA (Quad Super Extended Graphics Array) is a display resolution of roughly 2560×2048 pixels with a 5:4 aspect ratio.

WQSXGA

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.

QUXGA

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.

WQUXGA

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 4 times 1920x1200 and was released as a product in June 2001 by an IBM display panel built into the IBM T220 LCD monitor, IBM T221-, Iiyama AQU5611DTBK, Viewsonic VP2290b [link], and idtech MD22292. 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 outputs 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 one does so.

References

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Computer display standard
Video hardware
MDA \| Hercules \| CGA \| EGA \| VGA \| MCGA \| 8514 \| XGA
Display resolutions ([Image])
QVGA \| VGA \| SVGA \| XGA \| SXGA \| SXGA+ \| UXGA \| QXGA \| QSXGA \| QUXGA \| HXGA \| HSXGA \| HUXGA
Widescreen variants
WXGA \| WSXGA/WXGA+ \| WSXGA+ \| WUXGA \| WQXGA \| WQSXGA \| WHXGA \| WHSXGA \| WHUXGA \| WQUXGA

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