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:
Feb. 11, 2025
Filed:
Dec. 20, 2021
Digilens Inc., Sunnyvale, CA (US);
Alastair John Grant, San Jose, CA (US);
Richard E. Bergstrom, Jr., Hayward, CA (US);
Roger Allen Conley Smith, Sunnyvale, CA (US);
Michiel Koen Callens, Sunnyvale, CA (US);
Nicholas Sherwood, Sunnyvale, CA (US);
Nima Shams, Sunnyvale, CA (US);
Milan Momcilo Popovich, Leicester, GB;
DigiLens Inc., Sunnyvale, CA (US);
Abstract
Methods and apparatus for eye-glow suppression in waveguide systems is disclosed herein. Some embodiments of the methods and the apparatus include a source of image modulated light; a waveguide having an eye-facing surface and an external surface facing the outside world; an input coupler for coupling the light into a total reflection internal path in the waveguide; at least one grating for providing beam expansion and extracting light from the waveguide towards an eyebox; a polymer grating structure comprising a modulation depth and a grating pitch. The modulation depth is greater than the grating pitch across at least a portion of the polymer grating structure. Advantageously, the polymer grating structure is configured to diffract light entering the waveguide from the outside world or stray light generated within the waveguide away from optical paths that are refracted through the external surface into the outside world.