LG Promises A Resolution For Latest OLED TV Luminance Overshoot Issue

LG OLED TV owners have consistently proved themselves to be the AV world’s most discerning and demanding AV fans, while LG for its part has consistently proved itself capable of being the most reactive (in terms of addressing complaints) TV brand in town. This symbiotic relationship has now struck again, with owners of the latest X series of LG OLED TVs spotting another niggle with their mostly beloved TVs’ pictures that has LG has again quickly promised to get sorted.

The issue I’m talking about is one I haven’t covered before in any of my previous coverage of LG’s OLED sets (though it’s speculated that it’s connected with an old 8-series chrominance overshoot problem), and concerns a phenomenon that’s come to be described by those affected by it as Luminance Overshoot.

What happens is that parts of very dark images containing subtle shadow detailing can seem to ‘pulse’ at times, as the TV seems unable to settle on a stable brightness level for such near-black image content. Since such issues are always easier to simply show than describe, here are a few good video examples of the phenomenon occurring in a post by AVSforum user That Guy Logan.

Owners of 2020 LG OLED TVs such as the OLED48CX picture here have been reporting a so-called … [+]

As ever with issues like this – especially when they’re relatively subtle, and so aren’t instantly picked up on by every LG X series OLED user – trying to pin down how widespread the overshoot problem is, in terms both of the range of screens and types of content affects, isn’t easy. The combined efforts of various forum members, though, suggest that it affects most if not all X Series OLEDs, but that the aggressiveness of the problem possibly varies from panel to panel.

It can also occur no matter what picture mode or input you’re using, and cannot easily be calibrated away without completely messing the picture up. For instance, some sufferers report that they have to turn their OLED TV’s brightness setting to more than 60 before the overshoot issue disappears – at which point the pictures will look completely off in terms of both black levels and color.

Perhaps surprisingly the luminance overshoot seems equally as likely to occur with SDR content as HDR, and is seemingly particularly problematic with gaming sources. The problem pre-existed (and hasn’t been fixed by) recent update 03.21.16, and seems to be triggered whenever a white subpixel ignites above RGB 10 10 10 levels of luminance.

I forwarded descriptions and videos of the problem to LG at the start of February, and having looked into the issue, LG has now come back with the following short but informative response: “We are aiming to have an update to improve the situation for 2020 TVs within a few months”.

Some may be disappointed to see LG using the word ‘improve’ in its statement rather than, say, ’solve’ – and by the fact that unlike some recent LG fixes, this one appears likely to take a fairly long time to achieve. But surely it’s better to hear that LG thinks it can do something about the problem, even if takes a while, than for complaints about the problem to simply fall on deaf ears?

Naturally I’ll provide another update on my Forbes channel when I hear that the update is ready to roll out.

Related Reading

LG Unveils 2021 OLED TVs – Including New High Brightness Models

LG Has Already Fixed Its OLED TV Dim Game Mode Problem

I’ve spent the past 25 years writing about the world of home entertainment technology–first at Home Cinema Choice magazine, where I became Deputy Editor, and for the

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