Can someone explain the contrast ratio for LCDs??

[PremiumG]

i know what the response time is... Its the time it takes for the pixel to light up and for it to turn down right? The rise and fall time for the pixels....

Anyway, i know the higher the contrast ratio, the better; but what exactly is it?

 

[Zenmervolt]

Pixel response time is the time it takes to light or darken.

ZV

 

[poopygood]

google:

"LCD displays have controls labeled BRIGHTNESS and CONTRAST, but these controls have different functions than the like-named controls of a CRT display. In an LCD, the BRIGHTNESS control, or the control with that icon, typically alters the backlight luminance, thereby effecting control over what in a CRT would be adjusted by CONTRAST.

Contrast ratio is the ratio of luminance between the brightest white that can be produced and the darkest black that can be produced. Contrast ratio is a major determinant of perceived picture quality: If a picture has high contrast ratio, you will judge it to be sharper than a picture with lower contrast ratio, even if the lower contrast picture has substantially more measurable resolution.

To achieve good reproduced contrast ratio and good picture quality, it is important to set black level accurately. The most common problem with picture reproduction on video and computer monitors is misadjustment of black level. Figure 3 shows what happens if BRIGHTNESS is set too low. Figure 4 shows what happens if BRIGHTNESS is set too high."