Talk:Phosphor burn-in
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If I have a link for a company that sells a product that can fix this, should I post it? --Machtzu 13:15, 18 June 2006 (UTC)
- Can it be fixed? I mean in a CRT, unless you open the tube, remove the bad phosphor and replace it with new, then somehow reseal the tube and put it under vacuum again, I don't think so. 137.246.200.49 22:09, 4 February 2007 (UTC)
We need a cool picture for this. 63.226.28.130 17:34, 4 January 2006 (UTC)
The article describes the process of traditional phosphor CRT burn-in, but also mentions plasma displays at one point. Are any other types of display (eg TFT/LCD) susceptible to burning, or are they immune? If they also suffer burn-in, is the mechanism of failure different in any way? --131.111.8.103 19:40, 14 May 2006 (UTC)
Could the burning problem be reduced or prevented by lowering the screen contrast? TurboForce 00:24, 8 July 2006 (UTC)
- Good point. In a CRT: Reduced, maybe. Eliminated, no. You are still shooting electrons at the phosphor unless the area is black, where the electronics in the unit will shut off the beam. As for an LCD I think the phrase burn-in is a misnomer - you are not shooting electrons at the screen, you are just merely modifying the opacity of that particular pixel. I think the problem would still occur because it is a property of the liquid crystal to stay in that state if there long enough. Here, check out this java app from Colorado U. Physics dept.: [1] 137.246.200.49 22:09, 4 February 2007 (UTC)
I believe the Wikipedia reader's understanding of Phospor Burn-in (mine included) would be greatly enhanced if the article provided more insight into the physics involved with phosphor burn-in. At least that is what I was looking for but did not find in Wikipedia. My unanswered question is: Is less efficient phosphor more prone to burn-in? In other words, if Brand "X" projection CRT requires less electron beam current than Brand "Y" to produce the same light ouput, will brand "Y" CRT be more sensitive to poshpor burn-in from static images? If you know the answer to this or can provide a reference, please post it below.
- Above, I do not have a reference except my own memories and those of colleagues I have met during 20 years of computing and IT work. I am currently searching the web for others' experiences and old manufacturers manuals so I can link them here. I have added quite a bit of explanation to the Prevention section, as well as adding a section on History. In the history of this problem, as I wrote in the article, in times long past there were procedures from different display manufacturers to prevent phosphor burn-in. Often the times that the procedures were to be performed varied from mfr' to mfr'. This tells me that where one mfr' would say the procedure would take 72 hrs., and another took only 48 hrs., the latter clearly had a better formulation of phosphor chemicals or some other abatement scheme. If you check the wiki page on phosphor I believe there are several formulations of phosphor listed at the bottom of the article. Which of these was used in what exactly I do not know; the mfr' rarely, if ever, stated it in the manuals. As to the physics of the problem, I am not sure that it was even studied to any extent. Sounds like a good Master's thesis for someone... 137.246.200.49 22:09, 4 February 2007 (UTC)
[edit] ==advertising?==
This section right here:
A new technique employed by a novel software utility equalizes burn-in by monitoring how the screen is used and creating an inverse burn image. By displaying the inverse burn image, previous burn-in can be equalized. This means that bright and dark patches will not be noticeable and uniform brightness across the whole screen is achieved. This is an effective preventative measure. (JScreenFix deluxe link)
reads like an advertisement to me (e.g. "novel software utility"). If this one company's techniques are genuinely unique, then it shouldn't be too difficult to find some reliable sources regarding it. Linking to a product in the body of the encyclopedia entry seems out of place, so I'm going to remove it. Anyone feel strongly about this? Jodamn 01:24, 5 May 2007 (UTC)
- That's just an obvious and probably innacurate "fix" for the burn in. I don't think it even needs to be mentionned. —Preceding unsigned comment added by 69.159.88.55 (talk) 05:41, 14 April 2008 (UTC)
[edit] Burn-in on tube cameras
"Indeed if the on-screen picture included a very bright object on a black background, when the camera panned a smearing effect could be discerned." I'm not sure how much of this was caused by the TV set, as this smearing is noticeable with any video recording made with most types of tube-based video cameras (i.e. most video from before the '90s). I think there should be some discussion of tube cameras in this article as well, as I assume burn-in is an issue with them too. --Zilog Jones 12:00, 25 July 2007 (UTC)
