LG Display has unveiled 4th generation WOLED, the panel that will go into LG G5 and Panasonic Z95B. It is specified to reach 4000 nits of white brightness and 2100 nits of color brightness.
As reported on FlatpanelsHD in December, significantly improved OLED TV panels are coming this year.
Samsung Display is rolling out its improved 4000-nit QD-OLED TV panel, while LG Display will start production of a 4-stack WOLED, as hinted at CES 2025 last week by LG Electronics and Panasonic. Today, LG Display – the panel maker – has provided more details on the 4-stack WOLED, up from 3 stacks previously.
- "The Primary RGB Tandem structure applied to the fourth-generation OLED TV panel organizes 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," explained LG Display.
4000 nits white, 2100 nits color
LG Display said that by using 4 stacks instead of 3 and optimizing the power supply system, it has achieved 20% improved energy efficiency (for 65-inch) and a 33% increase in brightness. The microlenses (MLA) have been removed entirely.
The peak white brightness is 4000 nits (3%, flash), while the maximum color brightness is 2100 nits, a 40% improvement over last year's MLA OLED panel (3000 nits white, 1500 nits color). LG's color brightness is still significantly lower than on QD-OLED, which is pure RGB. This is because LG's WOLED still uses an additional white subpixel to boost brightness. LG Display added that full-screen brightness of the 4th gen panel is now around 400 nits.
Also read: First look at 2025 QD-OLED
WOLED TV panel advancement
| Peak white luminance (3%) | Full-screen luminance (100%) | Color luminance |
|---|
| 1st gen WOLED | 600-800 nits | 150 nits | - |
| 2nd gen WOLED (EX) | 1300 nits | 200 nits | 500 nits |
| 3rd gen WOLED (MLA) | 2100 nits | 220 nits | 700 nits |
| 3rd gen WOLED (MLA+) | 3000 nits | 250 nits | 1500 nits |
| 4th gen WOLED (4-layer) | 4000 nits | 400 nits | 2100 nits |
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New anti-reflection filter
LG Display said that it has also developed a new "ultra anti-reflection filter":
- "To solve this customer inconvenience, LG Display has developed a special film that offsets both light reflected from the display’s surface and light absorbed and reflected inside the panel. With the advantage of this ultra-low reflection technology, the company’s fourth-generation OLED TV panel blocks 99% of internal and external light reflections, realizing perfect black just like in a movie theater with the lights off even in a midday living room setting (500 lux)."
Additionally, the company pointed out that its WOLED panel uses 90% fewer plastic materials than an LCD panel.
Four generations of WOLED. Photo: LG Display
48-83" TV panels, monitor panels later
In 2025, the 4-stack panel will be produced in 48, 55, 65, 77 and 83 inches. It will be made at LG Display's factory in Guangzhou, China, while the factory in South Korea will continue to make normal WOLED panels.
LG Display will later switch to the 4-stack WOLED, or Primary RGB Tandem, for its monitor panels that currently use MLA OLED. These panels are used in gaming monitors from Asus, Acer, LG Electronics and more brands. The company teased that it will include the world's fastest monitor panel.
The first consumer products to use the 4th generation WOLED panel are the LG G5, LG M5 and Panasonic Z95B OLED TVs, with more expected to be announced later this year.
First TVs with 4-stack WOLED – specifications
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