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LG’s Revolutionary ‘Four-Stack’ OLED TV Panel: How It Works and What It Means

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LG's Revolutionary'Four-Stack' OLED TV Panel: How It Works and What It Means

One of the standout innovations at CES 2025 was LG Display’s fourth-generation ‘four-stack’ OLED panel, a major leap forward in television technology. LG Display, which supplies panels to LG Electronics and other manufacturers, has crafted this new technology to enhance brightness and color accuracy. This panel debuted in the LG G5 OLED TV and Panasonic’s Z95B OLED, marking a new era for premium OLED displays.

Unveiling LG’s 4th-Generation OLED Panel

The latest OLED panel boasts a peak brightness of 4,000 nits, a 33% improvement over its predecessor, the LG G4’s MLA panel. Additionally, the panel achieves 2,100 nits of color brightness, a 40% increase. These advancements promise to make OLED TVs even more competitive with mini-LED technology.

However, real-world performance might not reach these theoretical levels. For instance, the LG G4, rated for 3,000 nits, achieved a peak of 1,500 nits in actual tests. Despite this, the improved brightness will elevate HDR content and ensure vivid imagery even in bright environments.

LG's Revolutionary'Four-Stack' OLED TV Panel: How It Works and What It Means
(Image credit: LG)

What is the Primary RGB Tandem Structure?

LG Display calls its latest panel design the Primary RGB Tandem Structure, a system that stacks red, green, and blue OLED layers between two blue layers. This innovation increases light output and eliminates the need for a micro lens array (MLA) layer used in earlier designs. By separating the color elements, the new design enhances color purity and brightness, providing a significant boost in image quality.

Key Features:

  • Energy Efficiency: LG claims a 20% improvement in energy efficiency for the new panel, achieved through a more advanced power supply system.
  • Reduced Reflection: The ultra-low reflection technology reduces surface and internal reflections by 99%, maintaining perfect blacks even in bright environments.
  • Color Accuracy: 100% color accuracy in daylight conditions makes this panel a leader in overcoming traditional OLED limitations.

How LG’s Panel Enhances Viewing Experience

The third-generation OLED panels, such as those in the LG G4, offered excellent black levels even in well-lit rooms. The fourth-generation panel takes this further with its advanced coating and improved structure, making it ideal for high-contrast environments. Whether watching in a dark home theater or a brightly lit living room, users can expect vivid colors and sharp details.


OLED’s New Era: Competing with Mini-LED

OLED TVs have traditionally lagged behind mini-LED models in peak brightness. However, the introduction of QD-OLED and four-stack OLED panels has leveled the playing field. The new LG G5 and Panasonic Z95B models demonstrate this progress, offering not only superior color accuracy and contrast but also the flexibility to shine in brightly lit spaces.


The Future of OLED TVs

Premium models like the LG G5 and Panasonic Z95B will come at a higher price. However, their unparalleled brightness, improved HDR capabilities, and energy-efficient performance position them as strong contenders in the premium TV market. With these advancements, OLED technology now delivers the brightness, black levels, and color accuracy needed to match and even surpass the best mini-LED TVs.

Whether you’re a movie enthusiast or a casual viewer, these new OLED TVs provide the ultimate viewing experience.

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