|Originally posted by gpn
Can someone tell me the difference between a SXGA screen and a UXGA screen?
Basic screens have a 4:3 aspect ratio (ratio of width to height). Sizes (in actual pixels in the LCD):
XGA = 1024x768
SXGA = 1280x1024
SXGA+ = 1400x1050
UXGA = 1600x1200
QXGA = 2048x1536
Widescreen displays have a 16:10 aspect ratio, slightly wider for the same height. These are denoted by a "W" before the resolution name of the 4:3 screen with the same number of vertical pixels, so:
WXGA = 1280x768
WSXGA = 1600x1024
WSXGA+ = 1680x1050
WUXGA = 1920x1200
QXGA is so new that WQXGA doesn't exist, but if it did, it would be around 2458x1536, although the numbers don't divide evenly.
Viewing angle is, technically, the angle from with the screen can be viewed without distorting colors, contrast and brightness. However, wide-aspect
screens (starting with the 'W', above) are often referred to as wide-angle
, so the term 'wide-angle' is somewhat ambiguous.
Most screens can only be viewed from within 30 degrees of perpendicular or so before they start to distort. Special screens are offered with a wider viewing angle for slightly higher prices, although the screens are marketed under different names by different manufacturers. For example, Dell markets this technology under the name "UltraSharp", which they explain here
. In this case vertical viewing angle goes from +10/-30 to +-50 and horizontal viewing angle goes from +-40 to +-65, a significant improvement. As I said, other manufaturers offer the identical screen under different technology names (other than "UltraSharp"), I just picked Dell because they have a good webpage explaining the concept.
But remember that when someone says "Wide-angle UXGA" they often mean wide-aspect, or WUXGA, even though technically "wide-angle" means a screen with wide-angle technology such as what Dell markets as UltraSharp. Many manufacturers avoid the term "wide-angle" because of this confusion, using "wide-aspect" and whatever their specific marketing term is for "wide viewing angle".
Also, obviously, screens can be both wide-viewing-angle and wide-aspect at the same time.
As far as I know, Sager does not offer any wide-viewing-angle screens, and the only wide-aspect screen they offer is on the 4760.
Edit: Just wanted to add that I will not buy a computer with less than SXGA+ resolution, so unless that 16" UXGA makes it into the 8890, I'm going with the 5680.