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LCD Burning Problems

 
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Squall333



Joined: 28 Apr 2005
Posts: 91
PostPosted: Wed Jun 22, 2005 12:19 pm    Post subject: LCD Burning Problems Reply with quote
i found this quote
Quote:
What is burn-in?



The phosphors used in CRTs and plasma displays becomes less bright with usage. The phenomenon is a lot like “tire wear”. If you drive fast, the wear-per-mile increases, but there is some wear at any speed. The speed of a car corresponds to white in a TV image.



CRT burn-in used to be rare, but the demand for brighter images has made manufacturers less conservative. Now CRTs that have been showing a Windows desktop for a couple years will often show a lightly burned-in task bar when the screen is painted all white. The CRTs in big-screen TVs are pushed even harder, especially in the largest sets.



All CRT and plasma sets dim with usage. Making the screen age evenly is the user’s responsibility. The user must ensure that a fixed, unmoving shape is not displayed for many hours, or that shape will slowly become burned into the screen.



LCD, LCoS, and DLP sets do not suffer burn-in. (Some LCD and LCoS sets exhibit “image retention”, but it goes away in an hour or so.)
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Cogboy



Joined: 19 Jan 2005
Posts: 45
PostPosted: Wed Jun 22, 2005 1:11 pm    Post subject: Re: LCD Burning Problems Reply with quote
Squall333 wrote:

LCD, LCoS, and DLP sets do not suffer burn-in. (Some LCD and LCoS sets exhibit “image retention”, but it goes away in an hour or so.)


This is the part that applies to the psp. crt stands for cathode ray tube, this is the type of screen in your non-flat tv or monitor.
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TerryMathews



Joined: 31 Mar 2005
Posts: 19
PostPosted: Wed Jun 22, 2005 1:18 pm    Post subject: Reply with quote
An LCD is made up of three layers (or more if using different colorspaces) of electrically responsive grids of optical filters. Basically, a pixel is "green", because the red and blue filters are active, only allowing green light to pass through.

An LCD can suffer a kind of burn-in where the filtering portion becomes bleached by the backlight, or by sufficiently bright light on the frontt portion (room lighting or sunlight). I cannot say I've ever seen an LCD that was bleached, and it would probably take a lot of UV exposure over a significant period of time, but it is possible.
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