Hsiang En-Lin, He Ziqian, Yang Zhiyong, Lan Yi-Fen, Wu Shin-Tson
Opt Express. 2021 Nov 22;29(24):39859-39873. doi: 10.1364/OE.445479.
We propose a novel optical design to tailor the angular distribution of a micro-LED (µLED) display system and use vehicle display as an example to illustrate the design principles. The display system consists of a µLED array with a tailored LED structure, a small formfactor compound parabolic concentrator (CPC) system, and a functional engineered diffusor. It provides high efficiency, high peak brightness, and small formfactor. In the design process, a mix-level optical simulation model, including the angular distribution of polarized emission dipole (dipole emission characteristics), Fabry-Perot cavity effect (wave optics), and light propagation process (ray optics), is established to analyze the angular distribution of µLEDs. Such an optical design process from dipole emission to display radiation pattern can be extended to other µLED display systems for different applications.
我们提出了一种新颖的光学设计，以调整微发光二极管（µLED）显示系统的角分布，并以车辆显示屏为例来说明设计原理。该显示系统由具有定制LED结构的µLED阵列、小尺寸复合抛物面聚光器（CPC）系统和功能性工程扩散器组成。它具有高效率、高峰值亮度和小尺寸的特点。在设计过程中，建立了一个混合级光学仿真模型，包括偏振发射偶极子的角分布（偶极子发射特性）、法布里-珀罗腔效应（波动光学）和光传播过程（光线光学），以分析µLED的角分布。这种从偶极子发射到显示辐射图案的光学设计过程可以扩展到用于不同应用的其他µLED显示系统。
