Re: monitor terminology, 2ms(GTG)
contrast ratio = difference between blackest black level, and lightest white level
watch out for when they mention dynamic contrast ratios though. If it's a dynamic contrast ratio, it means the backlight varies brightness depending on the overall brightness of the image.
That means, for an image that actually has both black and white bits, the difference isn't going to be anywhere near what the advertised contrast ratio is.
input lag = the difference in time between the signal telling the monitor what to display, and the monitor actually starting the change of the image.
response time = how long it takes for the image to change, once it starts changing.
Remember, LCD's work by shining a backlight through the liquid crystals, and, depending on the voltage applied to them, only allow a certain amount of the light to pass through. But it takes time for the liquid crystals to change state.