Originally Posted by lapino
On another note, LG has agreed to replace my 65C7 for the yellow tint at the left side, but at the same time warned me that newer screens might or might not have this and there's not guarantee a new one will be better. How do you feel about this? Should I swap it? Is this a defect which is uncommon, or can I expect as bad uniformity on a different C7?
It's impossible to say for sure, but it definitely seems
that all of the 2017 OLED panels have this to some degree. The variance really seems to be person-to-person, combined with different settings, as well as different environmental factors (see below).
Originally Posted by VidPro
I really think most of these panels have some sort of yellow tint on the left side. So far the four panels I’ve had including the one now had it, but to a much lesser degree. Maybe it’s my mind playing tricks on me, but I’ve noticed the yellow
tint go from bad to worse to almost gone over the days. Last night it was much better to nonexistent which was kind of a surprise since the day before it was bumming me out.
I've observed the same exact behavior on my B7 (August build). I even saw changing results as I ran a cycle of the DNice slides. Starting out, I didn't see it at all on the white/grey slides. After the TV was on for an hour (warmed-up?), I came back and could easily see the yellow on the left. Over in the calibration thread they often talk about how much these panels drift, so this kind of temporal variance totally falls in-line with what their spectrometers see.
If I look carefully enough on a full white slide, I can see it slightly biased yellow -> blue -> green -> yellow -> blue. It's almost as if the problem is that there is simply a RGB uniformity problem when the TV tries to display them all evenly. Running a cooler white point temperature likely hides the problem, since it biases the whole screen towards blue.
Like many others, what I don't understand is how this isn't mentioned in many reviews, like the *many* HDTV test reviews by Vincent Teoh. He mentions it being a problem from 2015 that's solved in 2017, which makes no sense. This review from FlatPanelsHD
, however, shows an E7 (see 60 IRE) that looks almost exactly like my B7.
I guess if we're both seeing that it comes and goes that there's a chance it might go away eventually... but I haven't seen any cases of anyone definitively claiming "yep, I used to see yellow tinge and now it's gone permanently!" I'd like to at least *understand what it really is*. Some have claimed it to be the resin attaching the polarized AR filter, but that doesn't really make sense since it seems to go away depending on viewing angle (and is variant, as we both observed). To me, it seems to be some sort of variance going on at the pixel-level.