LG Display has finally revealed details of the fourth-generation 4-stack WOLED panel that was seen on its parent company’s new TVs at CES 2025 last week.
The company said the 4-stack WOLED panels will feature on the LG G5 and M5 OLED TVs that launch later this year, as well as the Panasonic Z95B, and most likely some models from other brands to be announced later.
As HDTVTest’s Vincent Teoh revealed last week, the new panel brings some significant improvements, with one of the most important being that it bumps up the brightness to an impressive 4,000 nits in white, and 2,100 nits in colour.
That represents an increase of approximately 40% in brightness compared to last year’s top-of-the-range MLA OLED panel, and LG Display also confirmed that it has removed the micro lens arrays entirely.
FlatPanels HD reports that the new 4-stack WOLED panels' colour brightness is still lower than that of Samsung Display’s newest QD-OLED panel, which uses pure RGB pixels. That was revealed last week, and can also reach 4,000 nits brightness. LG, on the other hand, adds a white subpixel to boost its brightness, which means colours don’t get the additional benefit.
That said, the new structure means that WOLED should maintain superior black depth in bright environments compared to QD-OLED, and of course its pixel structure means less colour fringing and artefacts. However, FlatPanels HD said that the viewing angles of the new WOLED panel are slightly narrower compared to last year’s MLA panel, although they’re still pretty decent compared to any LCD or older OLED TV.
In addition, LG Display says it has increased its coverage of the DCI-P3 colour gamut to 99.5%, up from 98.5% on the MLA panel. It’s also 20% more energy-efficient, the company said.
LG Display explained that the “Primary RBG Tandem structure” it applies to the new panels helps to organize the light source into four stacks by adding two layers of blue elements and independent layers of red and green elements.
“It improves maximum brightness by increasing the amount of light produced by each layer compared to the previous structure,” it added.
Other improvements include a new “ultra anti-reflection filter” that is essentially a special film applied to the panel that offsets light reflections on the surface and also the light that’s absorbed and reflected inside the panel.
Thanks to this, LG Display says its new panel can block 99% of internal and external light reflections, achieving perfect black replication similar to a movie theatre with the lights off, in daytime living room conditions.
Vincent Teoh has already been given an exclusive first look at LG's new 4-stack WOLED panel, and provides more details right here:
