https://scholars.lib.ntu.edu.tw/handle/123456789/633792
標題: | Using angle-selective optical film to enhance the light extraction of a thin-film encapsulated 3D reflective pixel for OLED displays | 作者: | Liao, Po Hsiang Lee, Wei Kai Lee, Chang Cheng Huang, Chun Wei Wen, Sheng Wen Chen, Yi Ting Chen, Chung Chia Lin, Wan Yu Kwak, B. Leo Visser, Robert Jan CHUNG-CHIH WU |
公開日期: | 19-十二月-2022 | 卷: | 30 | 期: | 26 | 來源出版物: | Optics Express | 摘要: | Light extraction improvement is still an important issue for active-matrix organic light-emitting diode displays (AMOLEDs). In our previous work, a three-dimensional (3D) reflective pixel configuration embedding the OLED in the concave 3D reflector and patterned high-index filler had been proposed for significant enhancement of the pixel light extraction. In this work, influences of thin film encapsulation (TFE) on light extraction of such reflective 3D OLED pixels are considered as well by simulation studies. Unfortunately, the optical simulation reveals strong reduction of the light extraction efficiency induced by TFE layers. As such, an additional angle-selective optical film structure between the pixel and the encapsulation layers is introduced to control the angular distribution of the light coupled into the encapsulation layers and to solve TFE-induced optical losses. As a result, TFE-induced losses can be substantially reduced to retain much of light extraction efficiency. The results of this study are believed to provide useful insights and guides for developing even more efficient and power-saving AMOLEDs. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633792 | ISSN: | 1094-4087 | DOI: | 10.1364/OE.477797 |
顯示於: | 電機工程學系 |
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