微米級尺寸發光二極體陣列之光學特性模擬分析

Optical Simulation and Analysis of Micron Scaled LED Array

楊淑媚(Shu-Mei Yang)

指導教授 ： 趙煦 ； 林建中

國立清華大學/電機資訊學院/光電工程研究所/博士(2019年)

摘要

微米級LED顯示器技術已被視為是下世代顯示器的主流技術之一。微米級LED具有許多優良的特性，例如廣色域、高亮度、低耗電以及快速響應時間。未來在擴增實境(Augmented Reality, AR)和混合實境(Mixed Reality, MR)的應用，更被視為最具有競爭力的技術。
本研究提出一套模擬架構，用於計算全彩微米級RGB LED顯示器的的光型和色差，包含miniLED 與microLED，並據此進行性能的評估。透過這項研究，我們探討了影響微米級RGB LED 顯示器光學性能的重要因子，包含有無基板、基板厚度、基板切割角、模塑層的形狀及氣泡等。透過模擬得知，其中基板厚度及切割角將在光學性能的設計上扮演重要的角色。基板及切割角的最佳化可影響光場分布並改善角度色差和圖像品質。而且，圖案化的基板可以提高光提取效率。然而由於紅光、綠光和藍光的光場分布不一致也增加了色差，需要透過精心的光學設計才能使光分佈均勻。我們並製作相對應的樣品，通過實驗驗證，顯示與模擬結果具有良好的一致性。
通過這項研究，可得知影響微米級LED顯示器光學性能的重要因子。我們認為本研究工作對於未來使用microLED技術實現下一世代高品質顯示器，具有重要的參考價值。

關鍵字

發光二極體 ； 微發光二極體 ； 顯示器 ； 色差

並列摘要

Micron-scale LED display technology has been recognized as one of the mainstream technologies for next generation displays. Micron-scale LEDs have many excellent features such as wide color gamut, high brightness, low power consumption, and fast response time, and are considered to be the most competitive technologies in future Augmented Reality (AR) and Mixed Reality (MR) applications.
This study proposes a simulation scheme for calculating the light pattern and color variation of a full-color micron-scale RGB LED display, including miniLEDs and microLEDs, and evaluating performance accordingly. Through this study, we explored important factors affecting the optical performance of micron-scale RGB LED displays, including the presence or absence of substrates, substrate thickness, substrate cutting angle, shape of the molded layer, and bubbles. Through simulation, the thickness of the substrate and the cutting angle will play an important role in the design of optical properties. Optimization of the substrate and cutting angle can affect the light field distribution and improve angular color variation and image quality. We also fabricated corresponding samples and measured the optical performance, which were verified and showed good agreement with the simulation results.
Through this research, important factors affecting the optical performance of micron-sized LED displays are known. We believe that this research work has important reference value for the realization of next-generation microLED high-quality displays in the future.

並列關鍵字

LED ； microLED ； display ； color variation

參考文獻

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