Meta-lit Lens Array Enhances Luminous Efficiency by over 20%

LG Display’s 8K OLED TV powered by convex lens principle technology

LG Display has developed the world’s first large organic light emitting diode (OLED) TV display featuring convex lens technology. The new display is twice as bright as conventional TV displays.

The new display is characterized by a fine convex lens array layer inside an OLED panel. The layer is not created by physically attaching an actual lens. A very thin lens material is deposited on an OLED panel through a deposition process and patterned to form a convex lens shape. The lens array layer adjusts the angle of light lost inside the OLED panel and amplifies it to increase light efficiency. It is a method of adjusting a light path so that light reflected from the inside of the panel advances toward the screen.

LG calls this technology a meta-lit lens array (MLA). When MLA technology is applied, OLED luminous efficiency jumps by more than 20 percent. A viewing angle is also widened by a light scattering effect. When viewed from the side, the screen is bright and clear. Its luminance reaches up to 2000 nits. Considering that the maximum luminance of current LG large OLED panels is about 1000 nits, this technology makes OLED screens quite bright.

On May 10, LG Display unveiled a 77-inch 8K OLED TV panel powered by MLA technology at the International Society for Information Display (SID) 2022 held in San Jose, California for three days.

The 77-inch 8K OLED TV was the world’s first TV loaded with both EX technology and MLA technology. EX technology refers to the OLED.EX panel technology that LG Display unveiled last year. LG Display plans to apply MLA technology to premium large OLED TV models in the future. Shin Hong-jae, a research fellow at LG Display, made a presentation about research results on the principles and effects of MLA technology at the SID 2022.

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