LG Display 4th Generation OLED detailed featuring a four-stack structure and 4000 nits peak brightness
16 January 2025, 08:13:56

The LG Display 4th Generation OLED employs a Primary RGB Tandem structure - a proprietary technology that uses independent stacks of RGB elements to produce light. It had previously used a three-stack light source, with two layers of blue elements emitting relatively short energy wavelengths alongside red, green, and yellow elements in a single layer. 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.
In addition, LG Display has raised the color brightness of the latest OLED panel generation. Color purity is enhanced by separating the red, green, and blue elements – the three primary light colors – into distinct layers, resulting in a color brightness of 2100 nits, a 40% improvement over the previous generation (1500 nits).
Moreover, energy efficiency has been maximized in line with the significantly higher expected power consumption of AI TVs. By enhancing the fourth-generation OLED TV panel’s structure and power supply system, LG Display has reduced its temperature and achieved around 20% greater energy efficiency than the previous generation (in the case of a 65-inch panel).
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).
A display’s color gamut and accuracy also decrease dramatically as the viewing environment gets brighter. However, this TV panel sees virtually no change in color gamut and offers 100% color accuracy at 500 lux. It is therefore the only display to overcome the viewing environment limitations of conventional displays.
The fourth-generation OLED TV panel emits only 45% blue light compared with the 70-80% emitted by an LCD screen. It additionally stands out as a sustainable display by adopting eco-friendly methods in the entire product life cycle from development to mass production, including using more than 90% fewer plastic raw materials than LCDs and improving the recycling rate of end-of-life product parts to over 92.7%.
LG Display will apply its fourth-generation OLED TV panel to its top-of-the-line mass-produced lineup this year to consolidate its dominance in the premium TV market. This means that it will be applied to the LG M5 and LG G5 OLED TVs.
The company then plans to gradually apply its Primary RGB Tandem technology to its Gaming OLED lineup, targeting the high-end gaming market with a diverse range of panels. This already includes the world's fastest monitor panel equipped with the industry's highest response speed and refresh rate, which are important specifications for gaming monitors, as well as bendable panels that adjust their curvature according to the gaming content.





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