公开(公告)号：EP4432006A1

公开(公告)日：2024-09-18

申请号：EP24162450.1

申请日：2024-03-08

Applicant: Meta Platforms Technologies, LLC

Inventor： Ye, Shenglin ,  Zhu, Xinyu ,  Kitsomboonloha, Rungrot ,  Hallstein, Sascha ,  Han, Wook Jin ,  Ma, Ruiqing ,  Li, Xiangtong ,  Wang, Yu-Jen ,  Kim, Cheonghong

IPC: G02F1/1335 ,  G02F1/13357 ,  G02B27/01

CPC classification number: G02F1/133614 ,  G02F2202/3620130101 ,  G02F1/133607 ,  G02F1/133615 ,  G02B27/017

Abstract: A liquid crystal display panel for near-eye display comprises a liquid crystal (LC) panel and a backlight unit (BLU). The BLU includes an array of blue light-emitting diodes (LEDs) (1210); a light guide plate (1220) configured to guide the blue light from the array of blue LEDs (1210) through total internal reflection, and couple portions of the blue light guided by the light guide plate (1220) out of the light guide plate (1220); a quantum dot film (1230) including quantum dots configured to absorb blue light and emit red and green light; a brightness enhancement film (1250, 1260) configured to transmit incident light within an angular range and reflect incident light outside of the angular range; and an optical efficiency enhancement film (1240) configured to modify an angular beam profile of light from the quantum dot film (1230) such that the light transmitted by the brightness enhancement film (1260) has a peak intensity in a direction perpendicular to the LC panel.