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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4059
(this is re. some scepticism that OLED screen burn is not repairable using any known mechanism)
It seems to work for the same reason that aiming an IR emitter at a red OLED makes it brighter but only if it is already worn.
I've checked this against my photodiode setup and there *is* a definite increase in brightness which is clearly visible to the naked eye.
I am pretty sure that this is due to the combination of weak electrical stimulation of the OLED molecules and infrared (only works with *some* 900nm diodes!) causing some of the non radiative recombination areas to convert back into the correct pi bonded light emitting configuration.
If anyone wants to check this try finding an old Galaxy S/S2/S3 with screen burn, you will often find that the red area under the bar brightens under IR emission and this if done for long enough results in some recovery of brightness as long as you don't overdo it and "cook" the small organic molecules. Even the diode from a TV remote will work, it has to be CW though as pulsed seems to do nothing. Perhaps the pulsed emission from the OLED itself is to blame here, its like resonance shattering a wine glass.
I've yet to try it on the blue but it looks very promising, Samsung haven't returned my emails for some reason.
Also relevant: I once tried this with an old totally useless MP4 wristwatch + 850nm 3J diodes and it did work but the screen was too badly damaged to show much recovery (solar radiation damage, that sheet is there to protect the screen)
Is this going to be another of those "I found it first but it was ignored" discoveries?
EDIT: Found a way to test this on "purple line" panels, of which there are many. The current fix is to replace entire assembly which makes the phone scrap! Same principle, essentially the organic transistors under OLED degrade so recovering them could be quite simple. Also should work on E-ink (except cracked) readers, and anything that uses organic interconnects.
I did test it on blue, with my S3 Neo but recovery wasn't as strong. Need to optimize process, watch this space! -Andre
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Possible new physics?
