LG solves the “last piece of the OLED puzzle” by improving blue pixel efficiency and lifespan

The Advancements in OLED Technology by LG

The big picture: OLED displays are known for their exceptional image quality and low response time. However, one of the challenges faced by OLED technology is the inefficiency and shorter lifespan of the blue pixels compared to red and green pixels. LG has made a breakthrough in this area by using tandem OLEDs and a combination of blue phosphorescent and fluorescent materials. This innovation promises better efficiency and improved image stability over the display’s lifespan.

LG made waves in 2012 with the release of the first 55-inch OLED TV. While OLED technology offers superior image quality, it also comes with drawbacks such as high costs and image burn-in. Burn-in occurs when static images are displayed for a prolonged period, causing pixel degradation and leaving behind ghost images.

Manufacturers have developed various techniques to combat burn-in, including pixel dimming and pixel shifting. However, the blue pixel’s inefficiency in emitting light compared to red and green pixels has been a significant contributor to burn-in issues.

LG’s “Dream OLED” solution tackles this problem by using a two-stack tandem structure that incorporates both fluorescence and phosphorescent materials for blue light emission. This innovative design is expected to increase display efficiency by 10-20%, reducing pixel stress and extending the lifespan of blue pixels.

While Apple has also introduced a similar tandem OLED concept in their 2024 iPad Pros, LG’s approach specifically targets the efficiency of blue pixels. If LG’s efficiency estimates hold true, we may see phone manufacturers adopting this technology to enhance battery life.

Although mass production and commercialization of Dream OLED may still be a year or two away, the future of OLED technology looks promising thanks to LG’s advancements in display technology.