The burgeoning field of Micro LED technology faces challenges such as full-color implementation, high transfer yield, and packaging tests on its path to commercial production. Recently, international reports revealed that a collaborative effort between Japan’s Meijo University and the King Abdullah University of Science and Technology (KAUST) has led to the development of a single-layer, full-color RGB GaInN (Gallium Indium Nitride) Micro LED array with a pixel density of 330 PPI (pixels per inch). This represents another significant milestone in the realm of full-color Micro LED technology.
Global Breakthroughs in Full-Color Micro LED
According to the researchers involved, this single-layer RGB GaInN Micro LED array could be used in wearable intelligent devices like AR (Augmented Reality), VR (Virtual Reality), and MR (Mixed Reality) headsets. These devices require micron-level pixel displays that cannot be manufactured using mechanical assembly techniques, thus necessitating single-layer manufacturing technology.
As for the application of GaInN material, researchers explain that while LEDs based on this substance do face efficiency issues at longer wavelengths, significant advancements have been made in terms of red-light efficiency in the visible spectrum. Moreover, the luminescent efficiency of GaInN LEDs is less affected by size reduction compared to commonly used red-light LED materials like Aluminum Indium Gallium Phosphide.
Breakthroughs in China’s Micro LED Research
In addition to international advancements, significant progress was made in China in May. Researchers at Xiamen University employed a glass micropore array to apply dual-component perovskite quantum dots to the blue-light Micro LED color conversion layer. This has led to improvements in the intensity and stability of red and blue light emission. The team achieved breakthroughs in both performance enhancement and process simplification, overcoming current bottlenecks in Micro LED red-light color conversion technology. This research has made high-quality, full-color Micro LED display possible at a lower cost, accelerating the industrial development of full-color Micro LED technology in China.
A Potential Game-Changer for AR/VR
As global single-layer, full-color Micro LED display technology matures rapidly, it is poised to significantly propel the AR industry forward. Traditional display technologies like LCoS (Liquid Crystal on Silicon) and Micro OLED have been unable to meet the brightness requirements of waveguide lenses. However, Micro LED miniature displays offer advantages such as high resolution, high pixel density, high brightness, and low power consumption. This makes them an ideal companion for waveguide lenses and positions single-layer full-color integrated Micro LED displays as potentially the most crucial core display technology for AR glasses.
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