Quote:
Originally Posted by kf4rca
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Let me tell you guys a story...
OLEDs do burn in, well, not really burn-in like an early plasma, but more of a decay of output for each color OLED - the blue fading quicker than the rest.
Here's the interesting part. One of the guys in our associating had an OLED come in for repair, and they found the control boar that drives the display bad. This TV was out of warranty, and the manufacturer wouldn't sell the control board separately - it was only available with a new display. A new display of course cost more than the TV did.
So, the repair shop just picked up a "re-certified" board (used) and installed it. When turned on, he noticed the logo of a news network prominently "burned" in the display (or so he thought). There were also other border lines and streaks indicative of a burned display. The customer picked up the TV and called back complaining about the image burned into the screen. The repair shop told him it must have been there before they worked on it, and the customer said they didn't even HAVE that news network on their cable.
So, they ordered another control board and that one had different marks on the screen!
So, what actually happens is that the blue OLED phosphors decay at a much higher rate than the red and green, so the control board keeps a "toteboard" of how long each pixel was run and at what intensity. It then ups the drive for the individual pixels that have been run more as the TV ages. This strategy hides the phosphor decay. This isn't a problem unless the control board fails or the memory on the board dumps.
I don't know if the memory chip can be moved to a replacement board as in this case, the manufacturer got involved and worked a buy-back deal on the TV.
John