Topic: Projector Burn In? (Read 76 times)

mattb · « **on:** November 03, 2003, 03:21:00 PM »

Comparing projection tv's to any other existant type of tv, would you say projection tv's are good with dealing with burn-in. I have a Sony Trinitron 27" (kinda old 1998) and I never observed this burn-in crap with it. I figure that more modern projection tv's have better protection against these problems. Getting down to the point, would it be safe to say I a brand new projection tv would be safe to play games with if I didn't pause them for hours on end? Taking this into mind, what brands or models are notorious for burn-in?

Mr Ed · « **Reply #1 on:** November 03, 2003, 05:40:00 PM »

You didn't specify rear projection or front projection.

Front projection can be LCD or DLP. DLP will never get burn in. LCD will get burn in but it's not as quick to as CRTs.

Rear projection TVs can be CRT, LCD, DLP, or LCoS. CRT rear projection TVs are probably the most prone to burn in of any technology out there. Honestly, that's the only kind of TV that I can walk into my local HiFi store and actually see burn in. LCD is subject to burn in as well. DLP and LCoS are immune to burn in.

spillage · « **Reply #2 on:** November 04, 2003, 05:46:00 AM »

Prey tell how LCD can get burn in when there is no phosphur to burn in its construction. Any product that uses phosphur including plasma and CRT will get burn in.
You just gotta be careful.

Mr Ed · « **Reply #3 on:** November 04, 2003, 08:38:00 AM »

QUOTE (spillage @ Nov 4 2003, 07:46 AM)

Prey tell how LCD can get burn in when there is no phosphur to burn in its construction. Any product that uses phosphur including plasma and CRT will get burn in.
You just gotta be careful.

"The burn-in like effects refer to a memory effect which can affect LCD displays. It isn't a permanent effect like that which happens with emissive phosphors.

Basically, the liquid crystal displays work by using electrical forces to align liquid crystal molecules into a coherent direction which causes a predictable and controlled polarization of light. Combining that with crossed, fixed polarizers, light filters and a light source allows one to create the color images we see on LCD's. The one part of this which gets forgotten is that the relaxed, incoherent state of the liquid crystal must be returned to after the control charges are done.

If a LC panel holds a portion of the liquid crystal in the coherent state (black on screen) the liquid crystal material can temporarily develop a tendency to stay in a more organized manner than normal. Thus long term black on a LC display may create an area which holds a persistent image effect that looks like a phosphor burn. Fortunately, if the LC panel is allowed to be quiescent (off) for an extended time, perhaps one or two days, the liquid crystal regains its normal characteristics. The effect reverses and the apparent "wear" or "burn" goes away. Another mechanism I've run across, but haven't verified, is a temporary charge problem on the driving transistors. Again leaving the panel off corrects the problem."

spillage · « **Reply #4 on:** November 04, 2003, 10:13:00 AM »

Burn in can occur when actually playing any game that has bright graphics that remian fixed regardless of the mode of play like a border around a score or a fixed bright cockpit view. If you calibrate your TV properly, whereby you are more than likey to find that you have always had the brightness (black level) and the contrast (peak white) up too high. Using your head, no need to be paranoid, will keep you from damaging your display.

Mr Ed · « **Reply #5 on:** November 04, 2003, 04:12:00 PM »

Mr Ed · « **Reply #6 on:** November 04, 2003, 04:14:00 PM »

QUOTE (entermymatrix03 @ Nov 4 2003, 11:29 AM)

burn-in is only if you leave the game paused for a while right? so i can play my games for hours at a time and not have any problems? what do we do about sports games that leave the ticker up there like baseball games (football games tickers change throughout the game so it shouldn't be a problem). how long does it take a tv to burn in. i'll be getting a CRT sony box.

CRT front view or rear projection?

CRT rear projection are the most prone to burn in of anything.

I have lot's a friends with RP CRT and they don't have noticeable burn in. So basically just be careful about those paused games, maybe don't have brightness cranked up too high, and chill.

Softco Industries · « **Reply #7 on:** November 04, 2003, 05:24:00 PM »

I wouldn't think projector burn in is possible, but I don't know about these things. If it's being projected onto glass or plastic, the image won't be frozen into the glass, will it? Or is projection like CRT? New CRT's supposedly prevent burn in, and LCD's I'm pretty sure don't have burn-ins.

networkBoy · « **Reply #8 on:** November 04, 2003, 07:06:00 PM »

QUOTE (entermymatrix03 @ Nov 4 2003, 07:29 PM)

burn-in is only if you leave the game paused for a while right? so i can play my games for hours at a time and not have any problems? what do we do about sports games that leave the ticker up there like baseball games (football games tickers change throughout the game so it shouldn't be a problem). how long does it take a tv to burn in. i'll be getting a CRT sony box.

Think of the health monitor on Halo, that doesn't move even if the rest of the screen does.
(I admit it's not going to burn too bad, but hey)
-nB

Nice info Mr. ED

Mr Ed · « **Reply #9 on:** November 04, 2003, 07:18:00 PM »

QUOTE (Softco Industries @ Nov 4 2003, 07:24 PM)

I wouldn't think projector burn in is possible, but I don't know about these things. If it's being projected onto glass or plastic, the image won't be frozen into the glass, will it? Or is projection like CRT? New CRT's supposedly prevent burn in, and LCD's I'm pretty sure don't have burn-ins.

Well remember most rear project TVs are CRT based. So the three color guns are basically single color CRT TVs. Each one of them uses phosphor than can get burnt.

Mr Ed · « **Reply #10 on:** November 05, 2003, 09:20:00 AM »

QUOTE (kcarlen @ Nov 5 2003, 09:25 AM)

Most newer projectors have screen savers built into the electrionics...no?

Only if you disconnect the signal. If they are receiving a signal, they have no way of knowing if the image is moving or static.

kcarlen · « **Reply #11 on:** November 06, 2003, 07:11:00 AM »

That makes complete sense. I wonder why the developers of the XBOX OS system don't think about that type of thing. It would be great if XBMP and EVOX/Dash systems somehow monitored the keypad for action during a set time. If there is no inputs, then the screensaver should be activated. Sounds kind of simple....doesn't it?
I program machines in an industrial atmosphere...and that type of logic is really easy to develop. I wonder where I could ask the developers if they can roll this type of safety into the media player stuff.......although during MP3 playback.,....that could be a prob. More logic to consider.

Author Topic: Projector Burn In? (Read 76 times)