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LCD Black Level

post #1 of 7
10/16/08 at 1:43pm
Thread Starter 
Having scoured the Internet for information on this I've ended up here. On every LCD I've ever seen, black has appeared as grey. Can someone explain to me why exactly LCDs are like this? Have I just not seen any quality LCDs?
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post #2 of 7
10/16/08 at 3:41pm

Re: LCD Black Level

Quote:
Originally Posted by QuiescentWonder
Having scoured the Internet for information on this I've ended up here. On every LCD I've ever seen, black has appeared as grey. Can someone explain to me why exactly LCDs are like this? Have I just not seen any quality LCDs?
The "back light" feature plays a part in this problem. Between "contrast" settings and "back light" settings and "bright" settings, you'll need to find a marriage that will give you the blacks you are after. Although, they may not be as deep and impressive as some DLP's and Plasma's on the market.
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post #3 of 7
10/17/08 at 7:12pm
Thread Starter 

Re: LCD Black Level

Is there such a thing as an LCD that can produce a true black as a CRT can?
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post #4 of 7
10/17/08 at 7:27pm

Re: LCD Black Level

LCD's cannot produce a true black. And contrast does not control your blacks either. Contrast controls your white levels while brightness controls your black levels. Depending on what kind of LCD you are looking at, a lot of them have a black enhancement mode as well. Just depends on the brands and models as well.
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post #5 of 7
10/17/08 at 11:16pm

Re: LCD Black Level

Quote:
Originally Posted by bosawx17
And contrast does not control your blacks either.
No one said it did. What was said by me was, between the three settings of Contrast,Bright and Back Light used together may yield a darker black than is currently present. It takes some tweaking and won't be perfect, but, you can make an LCD screen a hell of alot better than they are when it comes to blacks.
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post #6 of 7
10/18/08 at 9:10am

Re: LCD Black Level

Quote:
Originally Posted by QuiescentWonder
Is there such a thing as an LCD that can produce a true black as a CRT can?

The short answer is "No."

LCDs have gotten much better in recent years at reproducing something more like a true black than they did in the old days, but they still cannot match what a CRT (or plasma, DLP or LCoS) does - and probably never will. It seems to be an inherent limitation of the technology.

I believe that plasma, CRT and DLP are your only real choices for true. I'm not certain about LCD front- or rear-projection systems, since I never serioulsy auditioned any. I suspect that they also fall short in the black-level department, but don't know that for a fact.

Regards,

Joe
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post #7 of 7
10/18/08 at 11:33am

Re: LCD Black Level

The fundamental problem is that current LCD displays all have their light-source on, all of the time. The crossed polarizers block MOST of the light to make black.

Future and some existing HDR monitors use a whole bunch of backlights, and can actually turn off the backlights in areas that are showing "black", or even turn them down dynamically as their region goes dark.

Leo
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