Chang Kao-Der, Li Chang-Yi, Pan Jui-Wen, Cheng Kuei-Yuan
Opt Express. 2014 Mar 10;22 Suppl 2:A567-76. doi: 10.1364/OE.22.00A567.
Organic light emitting diodes (OLEDs) with a quasi-crystal (QC) structure are analyzed and applied in a head-mounted display (HMD) system in this study. We adopt a hybrid simulated method to evaluate the light extraction efficiency (LEE) and far-field pattern in the air, and study the relationship between them. The simulation results show that OLEDs implanted with the QC structure can provide a collimated far-field pattern to increase the brightness. Using this 10-fold QC arrangement the maxima LEE of the OLEDs can be increased by 1.20 times. Compared with conventional OLEDs, the viewing angle of the OLED panel decreases from 120 degrees to 26 degrees with an improvement in the optical efficiency of the HMD system by 2.66 times. Moreover, the normalized on-axis intensity in the pupil of the eyepiece can be enlarged up to 3.95 times which suggests that the OLED panel can save 74.68% energy while achieving the same on-axis intensity as conventional OLEDs.
本研究对具有准晶体（QC）结构的有机发光二极管（OLED）进行了分析，并将其应用于头戴式显示器（HMD）系统中。我们采用一种混合模拟方法来评估空气中的光提取效率（LEE）和远场模式，并研究它们之间的关系。模拟结果表明，植入QC结构的OLED可以提供准直的远场模式以提高亮度。采用这种10倍的QC排列，OLED的最大LEE可提高1.20倍。与传统OLED相比，OLED面板的视角从120度减小到26度，HMD系统的光学效率提高了2.66倍。此外，目镜光瞳中的归一化轴上强度可扩大至3.95倍，这表明OLED面板在实现与传统OLED相同的轴上强度的同时，可以节省74.68%的能量。
