High aspect ratio microdisplay and thin optical component for glass-like AR devices

• Published in: Journal of Information Display Vol. 22; no. 3; pp. 163 - 171
• Main Authors: Kang, Chan-mo, Shin, Jin-Wook, Choi, Sukyung, Kwon, Byoung-Hwa, Cho, Hyunsu, Cho, Nam Sung, Lee, Jeong-Ik, Lee, Hyunkoo, Lee, Jeong Hwan, Kim, Hokwon, Cho, Ara, Park, Sang Hyun, Kim, Minseok, Park, Soon-gi, Kim, Youngjoon, Ha, Jeonghun, Kim, Jaehyeok, Kim, Sang Tae, Lee, Jong Soo, Lee, Seung No, Im, Yu Bin, Byun, Chun-Won
• Format: Journal Article
• Language: English
• Published: Seoul Taylor & Francis 03.07.2021; Taylor & Francis Ltd; Taylor & Francis Group; 한국정보디스플레이학회
• Subjects: AR device; AR/VR; Augmented reality; Backplanes; Cameras; CMOS; Color; Crosstalk; Efficiency; Experiments; Field of view; Form factors; High aspect ratio; Lenses; Light emitting diodes; OLED; OLED microdisplay; Optical components; Organic light emitting diodes; 전기공학
• ISSN: 1598-0316; 2158-1606
• DOI: 10.1080/15980316.2021.1902405

Organic light-emitting diode (OLED) microdisplays have attracted much attention as displays for small form factor augmented reality (AR) devices. To realize glass-like thin and wide field of view (FoV) AR devices, we designed a display module with a high aspect ratio microdisplay and a thin optical component. For the high aspect ratio microdisplay, we developed the color OLED microdisplay with a 32:9 aspect ratio and a 0.8-inch diagonal ∼2,490-ppi CMOS backplane. To express color and reduce optical crosstalk, we fabricated the color filter (C/F) patterning directly on the white OLED. We also developed a pin mirror lens with 11 pin mirrors to improve the optical efficiency and quality with a thin lens. By combining the microdisplay with LetinAR's pin mirror lens, we successfully demonstrated an AR device with a wide horizontal FoV of 46° but with a small form factor 4 mm lens.