公开(公告)号：US20230213756A1

公开(公告)日：2023-07-06

申请号：US17566019

申请日：2021-12-30

Applicant: Goertek Inc.

Inventor： LINGSHAN LI

IPC: G02B27/00 ,  G02B27/01 ,  G02B27/42 ,  G02B6/293

CPC classification number: G02B27/0081 ,  G02B27/0172 ,  G02B27/4205 ,  G02B6/29323

Abstract: An optical display system and an augmented reality electronic device are disclosed. The optical display system comprises: a waveguide; an input coupler, provided at the input end of the waveguide and couples an image light into it; and a two-dimensional grating, provided at the output end of waveguide. The waveguide delivers the image light to the two-dimensional grating, which performs pupil expansion on the image light and out-couples the expanded image light. The two-dimensional grating has rhombus lattices. Unit cells of the two-dimensional grating are un-symmetric along respective axes parallel with a propagation direction of the image light incident onto the two-dimensional grating, from a top view of the two-dimensional grating. The unit cells are oriented with the propagation direction of the image light and each of the unit cells has at least two vertexes at its end side.

公开(公告)号：US20230251425A1

公开(公告)日：2023-08-10

申请号：US17666678

申请日：2022-02-08

Applicant: Goertek Inc.

Inventor： LINGSHAN LI

IPC: G02B6/27

CPC classification number: G02B6/2726

Abstract: An optical waveguide system and an electronic device are disclosed. The optical waveguide system comprises: a waveguide; an input coupler, coupling a light including a first and a second color component into the waveguide; and an output coupler, including: a first polarization color filter, converting the first color component of a first polarization state into the first color component of a second polarization state without changing the second color component of the first polarization state; a first polarization volume grating, coupling the first color component out of the waveguide; a second polarization color filter, converting the second color component of the first polarization state into the second color component of the second polarization state without changing the first color component of the first polarization state; a second polarization volume grating, coupling the second color component out of the waveguide.