LCD afterimage (burn in)

[Glen]

Anyone ever hear of this before.

I took this from the Panasonic PTAE500 owners manual on their web site :

* Liquid crystal panel

Do not project the same image for long periods of time, as this may remain as an afterimage on the liquid crystal panel. *


I have never come accross a statement like this before. Everything I've ever read states that the main benefit of LCD (and DLP) is no burn in ( as apposed to CRT displays ).

:?:

[Bent]

Glen, I think there is less burn in, not no burn in with LCD's.

I have a buddy with (used to have) a Sony VPL 400Q, that he bought used, it had considerable "4:3" wear on it's panels, but he was able to "excercise" it out by using it in wide mode.

[Dean McManis]

The crucial difference between CRT phospher burn-in and LCD image retention is that a badly burned CRT is a goner, but LCD panels can usually work out the image memory with additional use, and you really have to abuse them in the first place, leaving fixed, high-contrast images on screen for extended periods of time.

-Dean.

[Glen]

Thanks Bent, Dean

That makes sense.

[Brandon B]

And from the world of extremes -

We install PJs (primarily LCD) in theme parks where they run 14-18 hours a day. We have seen instances where the PJ is showing a static image 40-80% of the time, you get burn-in. We are able to reverse it, but it comes right back with those useage patterns. We have never had a problem with it when using changing imagery, even where it is repeated a lot.

This should be at the very bottom of the list of concerns when choosing PJ technology IMO.

BB