OLED Displays burn-in has always been an interesting topic, with some users and reviewers complaining about serious burn-in issues in some of their OLED TVs, while others report of no visible issues. UK based HDTVTest performed a comprehensive 6-month test on a brand new LG E8 OLED TV and found no sign of permanent burn-in.
HDTVTest says that they displayed varying content for 20 hours a day for more than 6 months (a total of over 3,700 hours). They also suggest to put the TV in standby mode rather than complete power-off so that the compensation cycles can run.
In 2017 we posted this article that explains more about the causes of temporal and permanent burn-in in OLED displays. I for one has an LG OLED B6 for over 3 years now, and have been using several OLED smartphones since my first Galaxy S back in 2010, and have never had any burn-in problems.
