MASTER BURN-IN/BREAK-IN THREAD: ALL POSTS HERE ONLY! - Page 98  

Originally Posted by fogey

Couldn't understand one thing. CRTs and plasmas use the same phosphors. Why no CRT TV needs any break in, or rarely ever has burn-ins? What's the difference?
That's what I've found on the Net:

"The longevity problem comes from the fact that the light-emitting efficiency of the phosphor coating decreases over timethat is, when a phosphor is stimulated by a photon, it releases less and less light. The problem is much worse in a plasma set than in a CRT because the plasma's phosphors exist in a hostile environment; the electron beam in a CRT is much kinder to phosphors than are a plasma's hot gases. In a plasma display, the contrast ratiothe difference between lit and unlit picture elementsdrops quickly under normal use, as much as 50 percent in four to five years. At that point, the television image appears noticeably washed-out.

Manufacturers today claim 60 000 hours of use before the brightness falls by half (based on a few hundred hours of testing). Contrast, however, is more important than brightness. Recent tests by market research firm IDC, in Framingham, Mass., measured a 13 percent decline in the darkness of the black of a typical plasma television after four weeks of use; after five years of use, such a rapid decline could lead to blacks displaying as light grays".


So, it's only 1 to 5 years after all... Kind of disappointing.

Originally Posted by Mfoxm

Can you provide a link to said research?

I'd think the plasma community would go ape sh7t over a declaration that a plasma tv's shelf life is 1 to 5 years?!

Originally Posted by lamajama

On Page 30 of the Samsung LCD model LNT4661F, it states that watching 4x3
tv longer than 2 hrs "may cause burn-in". Speaking to Samsung, they say
it is the black bars on each side of the 4x3 picture that burn-in.

Has anyone heard of this?

With normal cable channels, you still have a lot of 4x3 programming.

Originally Posted by thrasher8

Noticed that most Blu Ray/HD-DVD movies still display black bars.

Any recommended Blu Ray content out there that fills up the whole 16:9 screen for use during the break in period?

Thanks.

Originally Posted by IDRISCKY

Is turning down the contrast and brightness for the initial break in only, or for the lifetime of the display itself?

Originally Posted by IDRISCKY

Is turning down the contrast and brightness for the initial break in only, or for the lifetime of the display itself?

Originally Posted by fogey

Don't think brightness matters much, just turn down the contrast. For example, if you watch something in aspect ratio 2.35:1, black bars are the part of the picture. When you crank up brightness, those bars become brighter too, so the possibility of uneven ageing of the phosphors doesn't increase a bit. But when you turn up a contrast, black bars become darker and the rest of the screen brighter, so the central part wears off more rapidly than the areas covered by black bars.

Originally Posted by EchoTony

NO. You want to turn down BOTH....

Zero out Contrast (picture) and Brightness.

The idea is to gently excite the phosphors, brightness directly affects the amount the phosphors are being excited.

YOU DON"T WANT ANY BLACK BARS if you can avoid them during the intial 100-200 hours. That means zoom in on movies so there are no bars on top/bottom. That means wide/just/zoom regular TV so there are no side bars. The idea being to evenly excit the panel's phosphors.
Some will say that's extreeme. That just watch what-ever and keep settings down. Others say no need to even turn things down, just enjoy the TV.
That's a personal choice, that I decided was in favor of being extra cautious for the first week. Big deal over the lifetime of the panel.
Another option is to watch what-ever on any settings and in native view, then, when not watching, switch to HD or other screen filling source and let that run at zero settings to even out everything.

Again, if you are trying to gently awaken the new phosphors, turn down both picture AND brightness.

Originally Posted by fogey

The key word in a problem of burn-in is UNEVEN ageing of the phosphors. Contrast makes blacks blacker and the whites whiter, so high contrast should be avoided, at least for a while. Brightnes, on the other hand, makes blacks brighter, as well as whites, so there's no increasing of uneven-ness here. But sure thing, the more you turn up the brightness, the faster your TV's phosphors age, all of them. Which means that even with brightness one should be reasonable.

Originally Posted by fogey

The key word in a problem of burn-in is UNEVEN ageing of the phosphors. Contrast makes blacks blacker and the whites whiter, so high contrast should be avoided, at least for a while. Brightnes, on the other hand, makes blacks brighter, as well as whites, so there's no increasing of uneven-ness here. But sure thing, the more you turn up the brightness, the faster your TV's phosphors age, all of them. Which means that even with brightness one should be reasonable.