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that's not it

Posted by Joe Murphy Jr (A) on August 6, 2011 at 23:13:40

In Reply to: Brightness fluctuation. posted by sbrians on August 6, 2011 at 22:44:26:

I believe what he's talking about is a built-in design (flaw) that Panasonic has been including with their plasmas. Over time, there are intervals that the display is commanded to raise the light output of the actual phosphors.

For example, let's say that you calibrate the set for Brightness. After about 2000 hours of use, you notice that the display -- in a dark or low lit room -- doesn't get as black as it previously did. You bring out the calibration disc and recalibrate, but still notice that, with an all black screen, the display seems to "glow" more than when it was new. Well, it's not your imagination as the display has been programmed at the factory to do this. And no, you can't change the programming. But brace yourself, because in another 2000 - 3000 hours the "glow" is going to get a bit brighter again. Panasonic confirmed that this is indeed what should be happening, by design. This started a few years ago, but in 2010 they made a change to the design to increase the amount of time before an increase took place and slightly decreased that amount of increase. Supposedly, this has been eliminated or diminished even more with the 2011 models.

It is a flaw in design. To design such a non-defeatable change in the display is not beneficial to their brand.

Panasonic has two (kind of) independent divisions for their plasma manufacturing -- Business and Consumer. I have not been able to confirm if this takes place in their Business line of plasmas. Someone I get info from says they have been instructed to "zip it" when asked about this "feature" in the Business line. However, I have not seen any complaints on any of the video forums about a Business model owner bringing this "feature" up. Since the Business models cost more, I'm sure if this "feature" happened to them as well, there'd be a lot of pissed off owners complaining. So far, not a peep. Perhaps mo' money buys you that "feature" being omitted.

Here's some info to

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