公开(公告)号：US20240353707A1

公开(公告)日：2024-10-24

申请号：US18302556

申请日：2023-04-18

Applicant: Meta Platforms Technologies, LLC

Inventor： Hsien-Hui CHENG ,  Michael ESCUTI ,  Xiayu FENG ,  Mengfei WANG ,  Steven John ROBBINS ,  Zhexin ZHAO ,  Lu LU

IPC: G02F1/1335 ,  G02F1/13363 ,  G02F1/1337 ,  G02F1/137 ,  G03H1/02

CPC classification number: G02F1/133524 ,  G02F1/133507 ,  G02F1/13355 ,  G02F1/133636 ,  G02F1/133757 ,  G02F1/13706 ,  G03H1/0248

Abstract: A device is provided. The device includes a light guide configured to guide a first light propagating therein. The device also includes an optical film coupled with the light guide, optically anisotropic molecules in the optical film being configured with an in-plane orientation pattern having an in-plane pitch along the predetermined in-plane direction. Within the in-plane pitch of the in-plane orientation pattern, azimuthal angles of the optically anisotropic molecules are configured to vary nonlinearly along the predetermined in-plane direction. The optical film is configured to diffract the first light as a plurality of second lights at a plurality of locations of the optical film, with a plurality of predetermined, different diffraction efficiencies.