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sharp lcd tv's 1,000,000:1 contrast ratio


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Old 02-01-2007, 06:30
thms
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http://www.sharpusa.com/about/AboutP...0,C565,00.html
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Old 02-01-2007, 10:32
soulboy77
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1,000,000:1 my arse!
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Old 02-01-2007, 11:26
Jarrak
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It is a reference design intended for industry and video production companies so my guess is that the tecbhology it uses has never seen the inside of a domestic LCD and has a price bracket that is in line with a decent premium sized car
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Old 02-01-2007, 11:48
thms
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Originally Posted by Jarrak
It is a reference design intended for industry and video production companies so my guess is that the tecbhology it uses has never seen the inside of a domestic LCD and has a price bracket that is in line with a decent premium sized car
true. but it also means current average ratios have a great
scope for dramatic increases in the years (months?) to come
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Old 02-01-2007, 12:47
Jarrak
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Originally Posted by thms
true. but it also means current average ratios have a great
scope for dramatic increases in the years (months?) to come


Yes indeed although it depends how real the figures are, industry figures tend to be under ideal conditions and tweaked for certain performance.

The newish Clear LCD type technologies have vastly improved contrast ratios and black levels plus reducing smearing along with single figure refresh rates.
The only problem on the horizon is how "cheap" LCD has become, if the big boys can't rely on high profit margin premium panels than the R&D will stall just as it has done to a certain degree with Plasma.
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Old 02-01-2007, 13:00
meltcity
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If you look closely at the press release it is dated Jan 2006, not 2007.

The PR says nothing about backlighting, which is what causes LCD to have such a poor contrast in the first place. I suspect Sharp is using a reflective X-Black layer with all the compromises that entails.

Prototype High Dynamic range LCDs have been demonstrated which have an INFINITE contrast ratio.

How do they achieve this? Constrast ratio is determined by measuring the hig value in cd/m2 by the lowest black value. HDR LCDs use an array of dynamically adjustable white LEDs instead of the conventional primitive CCFL backlight. The LEDs can be turned off completely do deliver real blacks. Divide any number by zero and you get inifinity, hence the infinite contrast ratio!

Last edited by meltcity : 02-01-2007 at 13:21.
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Old 02-01-2007, 18:22
Jarrak
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Originally Posted by meltcity
If you look closely at the press release it is dated Jan 2006, not 2007.

.

How do they achieve this? Constrast ratio is determined by measuring the hig value in cd/m2 by the lowest black value. HDR LCDs use an array of dynamically adjustable white LEDs instead of the conventional primitive CCFL backlight. The LEDs can be turned off completely do deliver real blacks. Divide any number by zero and you get inifinity, hence the infinite contrast ratio



Yes I know I wasn't under any impression it was recent

As you say there are methods used by manufacturers to get a very good reported specification that is only possible via an aggressive tweak, something that would ruin the actual viewing experience.
In the case of the article the market for said LCD was not domestic and as such and failure to meet the demands of the industry (not the consumer) would I assume have more negative impact on Sharp than releasing a poor performing 32" for the home
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