High‐resolution and high‐brightness full‐colour “Silicon Display” for augmented and mixed reality
Hidenori Kawanishi, Hiroaki Onuma, Masumi Maegawa, Takashi Kurisu, Takashi Ono, Shigeyuki Akase, Shinji Yamaguchi, Naoto Momotani, Yusuke Fujita, Yuhei Kondo, Kentaro Kubota, Toshimi Yoshida, Yuta Ikawa, Tsuyoshi Ono, Hiroyoshi Higashisaka, Yasuaki Hirano, Shinsuke Anzai
Abstract
Abstract High‐brightness micro‐LED display bonded onto silicon backplane has been successfully demonstrated. The 0.38‐inch full‐colour active matrix LED microdisplay system consists of 352 × 198 pixels. Each pixel is 24 μm square composed of red, green, and blue (RGB) subpixels corresponding to a pixel resolution of 1053 ppi. Quantum‐dot materials are formed on III‐nitride blue micro‐LED array to convert blue light into red and green for full‐colour operation. We have confirmed that this microdisplay, which we call “Silicon Display” has wide colour gamut exceeding 120% of sRGB. We describe the advantage of this colour‐converting approach for the full‐colour micro‐LEDs. Progress toward higher resolution is also described. Brightness of more than 30 000 cd/m 2 has been confirmed at a driving current density of 4 A/cm 2 for 3000 ppi blue monochrome micro‐LED prepared for full‐colour Silicon Display. We believe our “Silicon Display” is ideally suited for near‐to‐eye displays for augmented and mixed reality.