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Contrast Ratio Question

#1
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3/7/08 at 2:41pm
  • Joined: January 1999
  • Post Count: 25
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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#2
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3/7/08 at 4:49pm
  • Joined: February 2004
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Re: Contrast Ratio Question

The higher number the better.
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#3
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3/7/08 at 5:16pm
  • Joined: July 2003
  • Location: Lacombe, AB
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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?

\"My opinion is that (a) anyone who actually works in a video store and does not understand letterboxing has given up on life, and (b) any customer who prefers to have the sides of a movie hacked off should not be licensed to operate a video player.\"-- Roger Ebert

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#4
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3/7/08 at 6:04pm
  • Joined: November 1999
  • Location: New England
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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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