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. 01, 2020
Filed:
Apr. 28, 2017
Cloudminds (Shenzhen) Robotics Systems Co., Ltd., Guangdong, CN;
CLOUDMINDS (SHENZHEN) ROBOTICS SYSTEMS CO., LTD., Shenzhen, CN;
Abstract
A directional optical waveguide includes a time division multiplexing unit and N layers of optical waveguides that have a same light-emitting direction and that are stacked, a light-emitting surface of each layer of optical waveguide being provided with a pixel-type grating; the time division multiplexing unit being configured to hierarchically control, within each frame video stream cycle, the N layers of optical waveguides to introduce a source light ray into a corresponding pixel-type grating during a corresponding frame video period, and the source light ray that is introduced into the pixel-type grating being diffracted in the pixel-type grating to form a plurality of first-order diffraction light rays that have different diffraction angles and diffraction azimuth angles and are in a one-to-one correspondence with display pixels, to be incident on a next layer of optical waveguides.