PLASMA and Burn -In

Archived from groups: alt.tv.tech.hdtv (More info?)

Plasma TVs definitely will exhibit "burn-in" despite claims to the contrary.
They emit light by driving / exiting phosphors with electrons, and these
phosphors wear out with use. They will wear uniformly if the picture does
not have relatively stationary / fixed data, and will gradually grow dimmer,
but in general such images will not have distinct areas of burn-in. If,
however, they are used with stock tickers, news crawls across the bottom,
high contrast / brightness video games, etc., they will burn in and show
marked patterns.

An LCD flat panel is thus a far better choice for this application. They
have no phosphors to wear out, and use a cold cathode fluorescent tube or
tubes to backlight a transmissive panel of glass sandwiched with a
polarizing organic compound which does not retain any memory of the image
after it is removed.

Smarty


"David Gillooly" <dgmfield@pacbell.net> wrote in message
news:qIZYe.1356$Ur.1079@newssvr29.news.prodigy.net...
>I am getting a lot of conflicting information from store sales reps on the
>issue of PLASMA burn-in.
>
> Here is my real world viewing situation.
>
> A plasma TV screen will be turned to the CNBC stock channel that displays
> two solid color bands at the bottom of the screen with scrolling text. The
> channel will be on 12 hours a day.
>
> Will this cause the display to become burned in? Some reps say that is an
> old plasma technology problem.
>
> Any real experience with this anyone?
>
> Dave
>
>
>

Archived from groups: alt.tv.tech.hdtv (More info?)

In article <vrydncIZeMe3BKneRVn-tQ@adelphia.com>, afiggatt says...
>
>>
>> Dave
>
> For this severe an application, plasma will burn-in. Panasonic
>claims for their recent generations of plasmas to have the same degree
>of resistance to burn-in as a direct view CRT. For the typical consumer
>who watches different TV channels and DVDs, burn-in is not a concern.
>But 12 hours a day of CNBC with the scrolling bars at the bottom of the
>screen will burn-in a CRT or plasma, probably within a few weeks or
>a month.
>

I've run CNBC several hours a day on a direct view CRT for five years without
any sign of burn-in. I also run an RPTV a few hours each day on CNBC and other
news channels with crawlers at the bottom without problems. I think the set
would have to be grossly mis-adjusted to get burn-in from these channels.
Remember, the ticker tape and news tickers are constantly moving. The only
concern might be the bands of color, which are constant. Early plasma's were
extremely sensitive to burn-in but that is improving according to the
manufacturers.

Archived from groups: alt.tv.tech.hdtv (More info?)

--
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"afiggatt" <afiggatt@adelphia.net> wrote in message
news:TrudnfMaJrJ3f6nenZ2dnUVZ_sudnZ2d@adelphia.com...
> BillJ wrote:
>> In article <vrydncIZeMe3BKneRVn-tQ@adelphia.com>, afiggatt says...
>>
>>> For this severe an application, plasma will burn-in. Panasonic
>>>claims for their recent generations of plasmas to have the same degree
>>>of resistance to burn-in as a direct view CRT. For the typical consumer
>>>who watches different TV channels and DVDs, burn-in is not a concern.
>>>But 12 hours a day of CNBC with the scrolling bars at the bottom of the
>>>screen will burn-in a CRT or plasma, probably within a few weeks or
>>>a month.
>>>
>>
>>
>> I've run CNBC several hours a day on a direct view CRT for five years
>> without
>> any sign of burn-in. I also run an RPTV a few hours each day on CNBC and
>> other
>> news channels with crawlers at the bottom without problems. I think the
>> set
>> would have to be grossly mis-adjusted to get burn-in from these channels.
>> Remember, the ticker tape and news tickers are constantly moving. The
>> only
>> concern might be the bands of color, which are constant. Early plasma's
>> were
>> extremely sensitive to burn-in but that is improving according to the
>> manufacturers.
>
> There is a big difference between several hours a day and 12 hours a day,
> five or more days a week. I agree, plasmas are not nearly as sensitive to
> burn-in as some claim. But in a heavy use application, the color bands
> will eventually burn-in. A CRT will sure as heck will eventually burn-in
> if you have unchanging parts of the screen.
>
> I have a Panasonic plasma (TH-42PHD7UY) and am very satisfied with it.
> Superb picture quality for DVD and HD. Not even a hint of burn-in even
> with pillarboxed SD for long stretches. But I wouldn't use it to
> exclusively view CNBC all day long.
>
> Alan F

I have to say, I was watching channel 5 in NYC and their plasmas had burn-in
from their logos that were clearly visible. Then, you know why a news
channel would have burn-in. Given how long they use them and how often,
that burn-in was not that bad looking, but I was able to see their logo
burned in.