Design of self-luminous pico-projection optical engine based on a quantum-dot color converted micro-LED

Haonan Jiang; Zibin Lin; Yao Li; Ziping Zhou; Enguo Chen; Sheng Xu; Yun Ye; Qun Yan; Taliang Guo

doi:10.1117/12.2638380

15 November 2022 Design of self-luminous pico-projection optical engine based on a quantum-dot color converted micro-LED

Haonan Jiang, Zibin Lin, Yao Li, Ziping Zhou, Enguo Chen, Sheng Xu, Yun Ye, Qun Yan, Taliang Guo

Author Affiliations +

Proceedings Volume 12448, 5th Optics Young Scientist Summit (OYSS 2022); 1244815 (2022) https://doi.org/10.1117/12.2638380
Event: 5th Optics Young Scientist Summit (OYSS 2022), 2022, Fuzhou, China

Abstract

Micro-LED will probably become the next epochal display technology, which has combined the advantages of liquid crystal display (LCD) and organic light-emitting diode (OLED). Its self-luminous characteristic will greatly compress the volume of the projection optical engine into truly pico-projection level. However, the relevant design and research are still insufficient. In this paper, we design a four-piece sphere lens group with a 5 mm focal length for micro-LED pico-projection, and then a simulation model of self-luminous projection optical engine is built for demonstration. The total length of the projection lens group is only 8.2mm, the modulation transfer function (MTF) is higher than 0.5@66lp/mm, and the distortion is below 1%. The irradiance distribution shows that the light efficiency is 44.9 % and the uniformity reaches 81.3% when the light divergence angle of micro-LEDs is set to 30°. Then, we explore the influence on light efficiency with different light source divergence angles and determine the optimal range of divergence angles. Finally, a R/G/B integrated micro-LED source with blue light and the above red/green quantum-dot color conversion (QDCC) layer is built, proving the feasibility of a full-color pico-projection optical engine with a single-integrated micro-LED chip.

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Haonan Jiang, Zibin Lin, Yao Li, Ziping Zhou, Enguo Chen, Sheng Xu, Yun Ye, Qun Yan, and Taliang Guo "Design of self-luminous pico-projection optical engine based on a quantum-dot color converted micro-LED", Proc. SPIE 12448, 5th Optics Young Scientist Summit (OYSS 2022), 1244815 (15 November 2022); https://doi.org/10.1117/12.2638380

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KEYWORDS

LCDs

RGB color model

Organic light emitting diodes

Projection systems

Lens design

Light sources

Modulation transfer functions

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