The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2023
Filed:
Apr. 11, 2023
Jiaxing Uphoton Optoelectronics Technology Co., Ltd., Zhejiang, CN;
Yuming Song, Beijing, CN;
Kehan Tian, Beijing, CN;
JIAXING UPHOTON OPTOELECTRONICS TECHNOLOGY CO., LTD., Jiaxing, CN;
Abstract
A diffractive optical waveguide and a display device for optical pupil expansion are provided. The diffractive optical waveguide comprises a waveguide substrate; a coupling-in grating; and a coupling-out grating comprising first, second, and third coupling-out gratings that are arranged successively in a first direction. The second coupling-out grating is corresponding to a region that includes a first edge and a second edge spaced in a second direction orthogonal to the first direction. The second direction is orthogonal to the first direction. The first edge is closer to the coupling-in grating than the second edge. A first width of the first edge in the first direction is greater than a second width of the second edge in the first direction. The light output by the coupling-in grating is incident on the second coupling-out grating through the waveguide substrate, and is diffracted by the second coupling-out grating into a plurality of beam splits.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile