The British Micro LED technology developer Plessey reported that it has successfully developed the world’s first GaN on Silicon-based red LED. (Image: Plessey) Whilst InGaN-based blue and green LEDs are commercially available, red LEDs are typically based on AlInGaP material or color converted red. For AR, achieving high efficiency ultra-fine pitch red pixels (< 5 µm) remains elusive due to severe edge effects from AlInGaP material and cavity losses from color conversion processes. InGaN-based red is attractive as it offers lower...