LG is addressing major challenges associated with OLED displays
LG has announced a significant breakthrough in OLED display technology, specifically addressing the inefficiency and shorter lifespan of blue pixels. The South Korean tech giant has developed a solution called "Dream OLED," which uses a combination of tandem OLEDs and a blend of blue phosphorescent and fluorescent materials. This innovation is expected to enhance efficiency and image stability throughout the display's lifetime.
Approach to tackling OLED display challenges
Since launching the first 55-inch OLED TV in 2012, LG has been at the forefront of OLED technology. Despite its superior image quality and low response time compared to LCDs, OLED technology has faced challenges such as high costs and image burn-in. The latter occurs when static images are displayed for extended periods, leading to faster pixel degradation and "ghost" images.
The main contributor to OLED display issues
The blue pixel in OLED displays has been identified as a significant contributor to image burn-in issues. Unlike red or green pixels that use phosphorescent emitters, blue pixels typically emit light through less efficient fluorescence. This inefficiency requires more power for similar luminance levels as red and green pixels, leading to faster degradation and contributing to burn-in problems.
'Dream OLED' technology: A solution for blue pixel issues
LG's "Dream OLED" technology addresses the blue pixel issue by using a two-stack tandem structure that layers the OLED light-emitting elements. This unique design incorporates both fluorescence and phosphorescent materials for blue light emission. According to LG, this new approach could result in a 10-20% rise in display efficiency, potentially reducing pixel stress and extending the lifespan of blue pixels.
Universal Display Corporation to supply blue phosphorescent material
The blue phosphorescent material for LG's innovative technology will be supplied by Universal Display Corporation, a US-based display material manufacturer. This collaboration is crucial in implementing the "Dream OLED" technology and achieving the projected increase in display efficiency. The new approach could potentially be adopted by smartphone manufacturers as a battery-saving feature, given its potential for enhanced efficiency.
