Originally Posted by JorgeLopez11
... Until yesterday I have'nt used my Panasonic to watch TV programs. So I ... watched History Channel for two hours.
And guess what? The IR is there!
Fortunately for me, the stupid logo gradually dissapeared (1 or 2 minutes or so),....
In short: The IR is there, but it's duration is still very short, so I wouldn't define it as "a problem"
....... I've just discovered that the IR is not a myth... but perhaps is not a problem either...
If you can watch the History (or History 2, for that matter) channel for a couple of hours, and then have the logo IR disappear after "1 or 2 minutes or so" would say your set is performing well.
The History channel logo has a reputation as being a particularly difficult one - that is, prone to causing IR - and, up until past
the 400 hour mark, two hours of History would have left an after image on our 60ST50 capable of lasting for several hours (or days, if the set wasn't being used often).
The "ESPN" and 'Encore HD" logos had the same impact (as have noted in earlier posts).
(Note that the resulting IR in all above situations would have been visible against Light Colored backgrounds - think, for example, of the many Commercials that employ a largely white background these days. Seemed counter-intuitive, given that a Bright White Logo was the most frequent CAUSE of the IR in the first place! Programming with a more varied background hid the IR from view.)
However, between 400-plus to 500 hours this panel became LESS prone to IR - and, particularly, to Medium- to Long-Duration IR - and currently behaves as "expected," based upon other Pan plasma experience.
Have not viewed History channel programming for a while, but watch ESPN & Encore HD enough to feel confident in the change. (Also had Med- to Long-Duration IR from leaving the Uverse "Guide" up on a frequent basis(!): Can still produce IR using the Uverse Guide, but it is now very short-lived.)
For now, agree with your assessment that IR duration is still very short, so I wouldn't define it as "a problem"
Was reasonably convinced that this panel went through a period of Heightened IR Tendency, from around 250 to 400+ hours. Upon reflection, it seems more likely that we simply did not expose the panel to as many "IR Opportunities" until after the 250 hour mark.
If you develop (or induce....) IR, and then switch to a static screen (such as a break-in slide), the IR will usually hang around a LOT longer than if you run normal programming. Therefore would consider doing so (switching to a break-in slide) a valid test of IR Onset, but NOT of IR Duration.
Have always considered LCD Panels to be a better choice for use as a Large Computer Monitor, or for Gaming - even though a bit of searching around will reveal that "image persistence" is not unknown on LCDs.
Also still have at least one old CRT around here that has Actual Image Burn-In. Certainly, it resulted from Actual Abuse (replaying same image repetitively over the course of several trade shows!) - but the darn thing dates from 1998 (!), so seems fair to say it has Burn-In & not Temp IR....