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Contrast Ratio 1200:1 (Dynamic Contrast Ratio 6000:1)

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Old 06-16-2007, 02:02 PM   #1
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Default Contrast Ratio 1200:1 (Dynamic Contrast Ratio 6000:1)

I'm looking at the specs for the Sharp 32" LCD at Costco.

I need to understand a little about the Contrast Ratio.

The specs of this set mention:

Contrast Ratio 1200:1 (Dynamic Contrast Ratio 6000:1)

Can someone explain this to me a little and tell me how good is this?
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Old 06-16-2007, 05:35 PM   #2
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The DCR is achieved through enhancement features while the 1200:1 is baseline CR. The specs are quite respectable for LCDs.
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Old 06-16-2007, 07:01 PM   #3
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My Bravia has 1300:1 and 7000:1 DCR. I was really impressed with the contrast on it. Personally I think it looks better then most plasmas I have seen. So I am pretty sure you would be happy with the numbers you gave us. Plus Sharp makes some awesome LCD's, I am very happy with mine.
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Old 06-17-2007, 11:53 AM   #4
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These are the contrast ratios for the TV I m looking at. Are these good? I am new to LCD TVs, so what is the difference between dynamic and on-screen.
18,000:1 (Dynamic)

2,000:1 (On-screen)
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Old 06-19-2007, 12:41 AM   #5
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Those are very good contrast specs...what's the TV make/model? Here's a decent explanation on dynamic, ANSI and full-on/full-off CR measurements:

http://en.wikipedia.org/wiki/Contrast_ratio
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Old 06-19-2007, 01:04 AM   #6
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Quote:
Originally Posted by borromini View Post
Those are very good contrast specs...what's the TV make/model? Here's a decent explanation on dynamic, ANSI and full-on/full-off CR measurements:

http://en.wikipedia.org/wiki/Contrast_ratio
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Old 11-15-2007, 10:07 PM   #7
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whats the vizio vx32L dynamic contrast
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Old 11-15-2007, 11:29 PM   #8
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No one has a real standard for contrast ratio.

Definition: Contrast Ratio is the difference between the whitest white and the darkest black colors the display can show. The greater the contrast, the better the screen and the subtlety of colors it can display.


Unfortunately, the blackest black, digitally is 000000 or “0” and the whitest white is FFFFFF or “16777215”. Anything divided by 0 is 0 and anything multiplied by 0 is 0 so the math for contrast ratio can be useless and companies use this to their advantage to claim anything they feel they can get away with.

Even when they use lumens as the baseline for (on-screen) black is still "0".
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Old 11-16-2007, 07:02 AM   #9
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Quote:
Originally Posted by lawnchair13 View Post
Anything divided by 0 is 0 and anything multiplied by 0 is 0 so the math for contrast ratio can be useless and companies use this to their advantage to claim anything they feel they can get away with.
Actually anything divided by 0 is "undefined" . . . to some it would be "infinity", but mathematicians don't particularly like that quantity.

Now, in the real world, the all '0' state is simply the digital condition as defined by the gray scale lookup table and is not related to "contrast ratio". And in the same real world, "0" lumens would never be measured as there would always be some ameient or reflective light present.

Finally, the numbers quoted by manufacturer's are all pretty much bogus and should not be taken seriously, since the mfgrs can manipulate the methods to achieve results not significant in the real world. The ANSI "checkerboard" method is the only standard for contrast ratio, and most sets, both LCD and Plasma tend to produce contrast rations in the range of 500:1 when measured in this manner.
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Old 11-16-2007, 07:07 AM   #10
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does the vizio vx32l have dynamic contrast
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