Originally Posted by wxman
This has nothing to do about BI. It's about the color red decaying rapidly. IOW, at 5000 hours red will no longer look like red. The higher the OLED light, the quicker red decays. The question is how long calibration can maintain red looking like red, before it fades to pink. Just like early plasmas, red was the first color to decay, and nothing could be done about it. At least that's the jest I get from it.
Yes, this is about aging, not burn-in.
And yes (from the other post), the content is not truly random or the wear would have been uniform, but that is also not the point.
The point is that this result indicates that with OLED Light at Max, your WOLED TV will start to dim after 5000 hours of whatever you display on it (other than a picture of a night sky
Aging is supposed to be roughly linear in brightness / light output, so if you get 5000 hours with OLED Light at 100 and ~380 cd/m2 of peak output, then you probably get 10,000 hours with peak output levels of ~190cd/m2 and perhaps 15,000 hours if you dial OLED Light back under 30 for ~120 cd/m2.
LGs current spec is for a lifetime of 15,000 hours and so yes, this result may not be too surprising - it is just the first objective proof that the lifetime spec is dialed back to 120 cd/m2 and is not valid at default settings.
Red wears out faster because it is one of the smallest subpixels and gets driven harder than green, blue, or white. Because the white OLED layer (blue-yellow-blue) under the red subpixels are generating more lumens than all pf their other-colored subpixels, those areas are degrading/aging/losing efficiency the fastest and either need to be driven even harder or put out a dimmer image.
LGD increased the size of the red subpixel in the 2018 WOLEDs, so lifetime may improve a bit for red so that all colors are aging at more similar rates.
But the only real message is if you like to crank your WOLED TV with high OLED Light levels, you will get far less than the stated 15,000 hours out of it...