PCstats evaluates the screen
characteristics of LCD monitors with the help of a program called
Monitor Test. This software application displays a
range of primary colours and special monitor test patterns which
enable an observer to diagnose just about any visual problem, or
defect an LCD display may be hiding.
The software consists of about eleven
tests which can be run in steps, as adjustments are made through the
OSD to optimize the monitor. Though some tests are primarily
intended for CRT monitors, Monitor Test is still a good tool for
evaluating common visual problems which can indicate of the quality
of LCD panel used, and its limitations.
Two critical items not covered by
Monitor Test are broken LCD pixels, and
pixel response times, which if too slow, can cause
blurring or ghosting of fast moving objects on the screen.
Broken Pixels: What we class as a
'broken pixel' can fall under any one of the following
circumstances: pixels that are always on (any colour), pixels that
are always off, pixels which are unable to display a primary colour
or shade (red, green, blue), or pixels which only display white or
black. While many manufacturers may consider a few broken pixels
acceptable, we believe the high cost of LCD displays should
translate into a clear and unblemished image that does not include a
single conspicuous broken pixel.
Pixel Response Time: Pixel
Response Times are measured in milliseconds, and account for the
rise and fall state, or the total time it takes for a pixel to
respond, and return back to its original state. We look for any
streaking associated with moving a full page of text up and down
very quickly. Displays with slow pixel response times tend to show
some degree of image streaking, or text discoloration in this simple
but effective test. Response times can also cause ghosting in games
where there are many fast moving objects. A response time of 25ms or
less is generally considered desirable.
All of our test parameters are user
reproducible, so you can try them yourself when evaluating displays.
Radeon X800 XT