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Contrast Ratio Question

post #1 of 4
3/7/08 at 2:41pm
Thread Starter 
I got a bit confused understanding this detail
which is better:
5'000: 1
10'000: 1 or
20'000: 1
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post #2 of 4
3/7/08 at 4:49pm

Re: Contrast Ratio Question

The higher number the better.
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post #3 of 4
3/7/08 at 5:16pm

Re: Contrast Ratio Question

Look at it this way: the larger number represents bright white, and the one represents black. Larger number for white= greater difference between white and black in the display which= better ability to display all of the gradations between white and black, as well as blacker blacks. Any questions?
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post #4 of 4
3/7/08 at 6:04pm

Re: Contrast Ratio Question

question:
if you look at display #1 with 5000:1 then look at display #2 with 10000:1 will you be able to tell the difference ??

Answer:
Most likely no (unless they are doing other tricks to the image ie: dynamic iris etc ).

These #s are a form of sequential measurement, or the variance between 2 screens. A much more useful measurement is ANSI contrast ratio, which is also called interfield. Film is around 100:1, or 150:1 on some specialized film stock. The best displays are currently doing about 300:1.

It is very rare to have a manufacturer list their ANSI ratio.

With both methods it is very common for the manufacturer to take the peak white reading with the display clipping, and the black reading with the display off.
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