You can get burn in from watching the wrong content that's commonly on cable TV. The ones who don't will have watched varied content with no static elements. The ones that do will at some point have had bright static elements on their screens. Some people will get burn in, some won't. That means that TVs with the same use will have the same wear, and the rate at which wear happens is predictable. I used rtings test of 6 c7s to prove panel wear is linear. Picture on half the time (BFI) at double the brightness would keep the same picture level - double 375 (max SDR) is 750 (HDR), so it's within the technical limits, but outside the realm of regular use without affecting panel lifetime adversely. HDR is likely out of linear range, because if it wasn't, BFI would be implimented in a way that doesn't dim the picture. The technology fundamentally hasn't changed since introduced, and the 6 C7 test proves it.Īnd the other tvs with different content to create burn in corroborate linear over time (what's visible at week 50 is roughly doubly visible at week 100)
OLED BURN IN SOFTWARE
You can assume a general 20-30% panel improvement regarding burn in and a doubling from software dimming (when target is static element to half its original brightness) Yeah, the 2017 and older panel issue mostly with red is well known.
LG has also confirmed that there is variation between panels, which is why some OLED appear more prone to developing uniformity issues (as in the case with our Live CNN (200 nits) vs Live CNN (Max).) Note that this doesn't fix other uniformity issues as the result of static content, only the 25% window caused by a factory defect. They have fixed our two affected TVs (see the uniformity photos below). LG will apply this fix to anyone who presents this issue to their support, for free, even after the warranty period has long expired. Only some 55" OLED TVs were affected during part of 2017.Īs this is not an issue with the panel itself, it is possible to apply a fix to the lookup table. Some TVs which haven't cooled completely can produce invalid results for the lookup table used by the 'Pixel Refresh' function, causing this 25% window to become visible. OLED TVs are produced in a hot process, and after cooling a 25% window is shown on each panel. LG engineers visited our lab a few days ago and were able to confirm the 25% window on the Live CNN and FIFA 18 TVs are a result of a factory issue ( see our video here). Week 11 (): We contacted LG regarding the strange results in week 4. SOME 2017 AND OLDER OLED PANELS DON'T DISSIPATE HEAT AS WELL AS OTHERS DUE TO A MANUFACTURING PROBLEM AND THERFORE ARE MORE PRONE TO BURN IN. MANUFACTURING QUALITY ON 2017 AND OLDER OLED PANELS.
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