LG Display has objectively proven the brightness retention performance of its OLED panels. LG Display said on Feb. 26 it received verification from global certification company UL Solutions that luminance retention for its entire lineup of large OLED panels, including TVs and monitors, is 100 percent.

Luminance retention is a measurement method that evaluates content reproduction as a percentage based on a display’s brightness. The test sets the standard measurement area centered on the middle of the screen in 4 stages: 10 percent, 1.1 percent, 0.5 percent and 0.2 percent of the full screen. It measures luminance in each area and expresses as a percentage whether the value is maintained without change.

So far, LCD-type panels have become darker as the standard measurement area shrank, dropping from a high of 83 percent to a low of 43 percent. But LG Display’s OLED panels maintained brightness performance even as the standard measurement area decreased and achieved 100 percent luminance retention.

OLED panels emit light at the pixel level, with each pixel measuring only about 0.10 square millimetres. It said this allows the panels to maintain brightness even when the standard measurement area is reduced, reproduce natural colours, clearly distinguish colour boundaries and convey the creator’s intent as it is.

LG Display plans to strengthen its leadership in large OLED based on such OLED technology. LG Display’s new large OLED TV panel products apply “Primary RGB Tandem 2.0,” which emits light by stacking the three primary colours of light in separate independent layers. It delivers a maximum luminance of 4,500 nits and also includes technology that absorbs and diffuses light rather than reflecting it, achieving a reflectance of 0.3 percent, the lowest level among existing displays.

Hyun-woo Lee (이현우), head of LG Display’s Large Business Division, said, “We have objectively identified why OLED looks brighter and clearer.” He said, “Through objective verification, we have been able to explain more clearly to customers that OLED’s pixel dimming technology, which maintains 100 percent luminance retention, is the best choice in the AI era.”