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There is currently a problem with using VRR on LG’s OLED TVs. This means that the image appears partially washed out and artifacts and flickering may occur in the dark areas of the image. As the OLED association along with LG has now confirmed, this is a hardware issue with the panels themselves. A fix for devices that have already been delivered is therefore extremely unlikely.
The technical cause lies in the fact that the panels operate natively at 120 Hz. The voltage of the individual OLED and subpixel pixels is designed for this. When using VRR, however, it must be dynamically adapted to lower Hz values. This leads to the fact that individual pixels can be overloaded, which leads to the mentioned effects.
LG Display has announced a solution by implementing several gamma curves, but according to TV expert Vincent Teoh, this solution shouldn’t be able to be presented via a firmware update. Rather, only future generations of TV can benefit from it. For the sake of fairness, it must be said that the VRR problem also occurs in the dark areas of the image on current LCD TVs, such as Samsung’s QLED models. However, it is much more noticeable on OLED TVs, as they can produce a darker image.
Since the same OLED panels are affected, the problem would also affect other manufacturers. Because companies like Panasonic, Philips, and Sony are currently buying their OLED panels from LG Display. However, other providers currently don’t use HDMI 2.1. Now we can also know why: it is possible that this very VRR problem has so far prevented other TV manufacturers from integrating HDMI 2.1 for their OLED TVs. However, this is pure speculation.
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