3 ms·

The Internet seems rather reluctant to explain what exactly "pixel cleaning" does, but based on the vague useless "explanations" I could find, I suspect it's a

The Internet seems rather reluctant to explain what exactly "pixel cleaning" does, but based on the vague useless "explanations" I could find, I suspect it's a sort of "flat-field correction" where it calibrates the pixel drive current to darken the less worn and/or brighten the more worn ones so it eliminates the burn-in effect. This obviously leads to a vicious cycle where more worn pixels are driven harder and hence wear faster... IMHO OLED is a planned-obsolescence dead-end anyway; LCDs can last literally decades, maybe with a backlight replacement, but OLEDs are designed to fail in a few years. I have a few (rather expensive) pieces of test equipment with OLEDs that became unreadable after only a few years and had to be replaced (fortunately with a regular LCD, and some firmware patching), while others with old-school CSTN/TN LCDs are still fine.

p1necone 1mo ago
If OLEDs are 'designed to fail' they've certainly gone about it in a very roundabout way - there would be much easier ways to do planned obsolescence if that was actually the goal of display manufacturers.
- karim79 1mo ago
  I have a LG wallpaper TV 65" from 2021. I see no burn-in whatsoever. Once in a while it says "we will do the pixel refresher thing when you turn off the TV". I'm pretty sure there's something to it but I'm no expert. Five years later and my TV is just fine.
  - realo 1mo ago
    A TV displays constantly changing images. A monitor displays items that can stay fixed in place a long time, hours or even days. Not the same at all.
    - karim79 1mo ago
      I use it as a monitor as well. I think the key here is what LG calls "screen shift" which makes obvious sense. No magic, just move the pixels around to prevent stuff like HUD and logos from burning the screen.
p0w3n3d 1mo ago
Pixel cleaning sounds little like blinker fluid to me...
UltraSane 1mo ago
OLEDS have two HUGE advantages over LCDs Extremely accurate and vivid colors due to their low black level. And VERY fast pixel response times, 0.01ms to 0.03ms compared to 1ms to 5ms for the fastest LCD gaming monitors.
- p1necone 1mo ago
  Yeah OLEDs are the first display tech we've had that is on par or better than CRTs in all aspects. On balance the tradeoffs were definitely worth it for the various LCD panel options but motion clarity, colour intensity and black levels were all still beaten by a CRT in a dark room until we got OLEDs.
some_random 1mo ago
Is is possible that some technologies could have longevity trade offs and not be "planned obsolescence"?
unrented7977 1mo ago
OLED burn in is not "planned obsolescence" any more than the "self-emptying gas tank". That's pure ignorance. OLEDs burn in because of simple physics. The same reason your car's gas tank empties when you use it instead of some secret cabal stealing your gas to make you buy more. Ignorant nonsense.
- inigyou 1mo ago
  It's not "simple" physics. Or can you explain the physics? Every display technology tries to suffer burn in if there's any long-term physical change at all from lighting up a pixel, because it will affect the ones that are lit up more often. That part is simple. However we did get around it with every other technology so please explain why it's not even theoretically preventable with OLED.

p1necone 1mo ago

If OLEDs are 'designed to fail' they've certainly gone about it in a very roundabout way - there would be much easier ways to do planned obsolescence if that was actually the goal of display manufacturers.

karim79 1mo ago
I have a LG wallpaper TV 65" from 2021. I see no burn-in whatsoever. Once in a while it says "we will do the pixel refresher thing when you turn off the TV". I'm pretty sure there's something to it but I'm no expert. Five years later and my TV is just fine.
- realo 1mo ago
  A TV displays constantly changing images. A monitor displays items that can stay fixed in place a long time, hours or even days. Not the same at all.
  - karim79 1mo ago
    I use it as a monitor as well. I think the key here is what LG calls "screen shift" which makes obvious sense. No magic, just move the pixels around to prevent stuff like HUD and logos from burning the screen.

p0w3n3d 1mo ago

Pixel cleaning sounds little like blinker fluid to me...

UltraSane 1mo ago

OLEDS have two HUGE advantages over LCDs Extremely accurate and vivid colors due to their low black level. And VERY fast pixel response times, 0.01ms to 0.03ms compared to 1ms to 5ms for the fastest LCD gaming monitors.

p1necone 1mo ago
Yeah OLEDs are the first display tech we've had that is on par or better than CRTs in all aspects. On balance the tradeoffs were definitely worth it for the various LCD panel options but motion clarity, colour intensity and black levels were all still beaten by a CRT in a dark room until we got OLEDs.

some_random 1mo ago

Is is possible that some technologies could have longevity trade offs and not be "planned obsolescence"?

unrented7977 1mo ago

OLED burn in is not "planned obsolescence" any more than the "self-emptying gas tank". That's pure ignorance. OLEDs burn in because of simple physics. The same reason your car's gas tank empties when you use it instead of some secret cabal stealing your gas to make you buy more. Ignorant nonsense.

inigyou 1mo ago
It's not "simple" physics. Or can you explain the physics? Every display technology tries to suffer burn in if there's any long-term physical change at all from lighting up a pixel, because it will affect the ones that are lit up more often. That part is simple. However we did get around it with every other technology so please explain why it's not even theoretically preventable with OLED.