In that photo, no.
I do see a reflection of the room's interior lighting.
You might be right. Then it would be the smaller white stain strikes near the top.
Or they just used a poor example.
Here's a better one:
▪
https://www.zdnet.com/article/lg-embarrasses-with-oled-burn-in-at-tradeshow/
The other link, the scientific one, has some good examples too.
And if you go in video forums for OLED TVs and Burn-in you will find owners of OLED TVs posting screenshots of their TVs with permanent burn-in images after only 3, 10, 15 months.
In particular the OLED TVs from LG model 2015, 2016 and 2017.
Even few from 2018.
When we get to December 2020, I am very quasi certain that we'll see a lot more LG Model 2018 OLED TVs with permanent burn-in images, logos, score bars, etc., on their displays.
I mean OLED are the best TVs but they are not perfect.
Should we buy top premium QLED and Fald lit LCD LED TVs with many many backlit regions behind their panels instead?
Maybe, maybe not, it depends. What each personal use and eyes is adapting and accommodating their prefer tradeoffs, values, alibis and collaterals. ...Mostly visually speaking and personal preferred own zone of comfort according to each videophile's own knowledge on the matter of scientific picture rendition.
Is it looking natural as the film director of cinematography intended or is it looking as the film mixer colorist and dynamic contrast (HDR or Dolby Vision) applicator saw it as fitting in collaboration with both directors (film and cinematography) on his professional video monitor. Is it live or is it artistically manipulated with GGI effects and psychedelic colors to create an effect different than true reality? ...See what I mean (it's no different than all the various music recordings of the same).
Me I think the viewer is also the artist who is free to explore on his own and create the moving picture he prefers best because how can you get a reference picture without having your own professional monitor. The best is to have it calibrated by a video pro expert calibrator.
Or just get one of those calibration discs. That's what I do...WOW Disney disc.
Which version of John Coltrane's 'Giant Steps' is the most closer to the original analog master tape and which one is the highest resolution from a digital file providing the most satisfactory
sensoriel pleasure to the ears and brain?
You have a TV Ray, a cathode ray tube, or a plasma? Do you have a LCD display or an OLED 4K display? ...All of the above, none, ...a Sanyo front projector? ...An AMOLED iPad? ...An ARMORED presidential limousine?
* Remastering music with say MQA is a bit similar to remastering the movie 'The Matrix' on 4K Blu-ray. ...What audio is to video.