AVS Forum Special Member
Join Date: Dec 2006
Location: Toronto, Ontario
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My Experience with Long-Term IR
I have two plasma TVs made by Panasonic:
TC-P65VT50 - manufactured on 21 August 2012; and
TC-P65ZT60 - manufactured on 21 October 2013.
The lifetime counter on the VT50 is 1440 hours and 1340 hours on the ZT60. I have never done any 'burn-in' on these TVs other than watching regular programming and I always keep them on the THX Cinema setting.
During the recent World Cup in Brazil, after the Group Stage, I noticed distinct IR from the scoreboard at the top left corner of the screen. At that time I had watched 48 games on both TVs and many game replays. I would estimate a total of 180 hours on each TV.
While the IR was noticeable to me, other people would not see it, unless I pointed it specifically to them.
I did not watch any football games on the TVs for the rest of the championship (I streamed on the computer and iPad instead).
I started running the screen wipe on both TVs, although on the VT50 it would cancel itself after 15 minutes. There was a noticeable improvement after 24 hours. I continued the 'treatment' as follows:
- on the VT50 I had the TV on daily for at least 14 hours, playing 16:9 format programming, on the THX Cinema setting. The TV was off at night; and
- on the ZT60 I had the TV on daily for at least 14 hours, playing 16:9 format programming, on the THX Bright Room setting during the day and running the screen wipe overnight, for the rest of the hours.
I have performed the above from 1 July and I would say that the IR disappeared virtually completely by 25 July (three weeks). However, I continued the 'treatment' for both TVs until the end of the month.
From my experience, I would say that, as a general rule, regular (i.e. not severe) IR is curable with a combination of watching regular programming and running the screen wipe for at least 1.5x the duration that the image that caused the retention was on.