Chinese Journal of Liquid Crystals and Displays, Volume. 38, Issue 7, 910(2023)

Optical design of super miniature Micro-LED projection

Yao LI1, Hao-nan JIANG1, Zi-ping ZHOU1, Jin-pei DONG1, En-guo CHEN1,2、*, Yun YE1,2, Sheng XU1,2, Jie SUN1,2, Qun YAN1,2, and Tai-liang GUO1,2
Author Affiliations
  • 1National & Local United Engineering Laboratory of Flat Panel Display Technology,College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China
  • 2Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China(Mindu Innovation Laboratory),Fuzhou 350108,China
  • show less

    With the emergence and development of self-luminous micron-pixel-sized Micro-LED (Micro light-emitting diode, μLED)?, using μLED as the light and image source have become possible for ultra-compact projection optical engines. It greatly simplifies the structure of traditional projection display optical engines. In this paper, a μLED-based super miniature projection optical engine is proposed, and a high image quality pico-projection lens is designed based on 3.302 mm(0.13 in) μLED display chip. The divergence angle of μLED display chip matched with the pupil of pico-projection lens is optimized according to the light distribution characteristics of μLED chip, which effectively improves the light efficiency of μLED based pico-projection optical system. The results show that the volume of the system is only 18.35 mm3, and the MTF value of the center field of view of the projection lens exceeds 0.57 at the cut-off frequency. The μLED based pico-projection display optical engine achieves a good trade-off between system volume and image quality, and has a wide application prospect in near-eye display devices such as AR/VR in the future.

    Tools

    Get Citation

    Copy Citation Text

    Yao LI, Hao-nan JIANG, Zi-ping ZHOU, Jin-pei DONG, En-guo CHEN, Yun YE, Sheng XU, Jie SUN, Qun YAN, Tai-liang GUO. Optical design of super miniature Micro-LED projection[J]. Chinese Journal of Liquid Crystals and Displays, 2023, 38(7): 910

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Research Articles

    Received: Nov. 7, 2022

    Accepted: --

    Published Online: Jul. 31, 2023

    The Author Email: En-guo CHEN (ceg@fzu.edu.cn)

    DOI:10.37188/CJLCD.2022-0216

    Topics