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:
Nov. 18, 2025
Filed:
Sep. 15, 2023
Apple Inc., Cupertino, CA (US);
Jian Gao, Fremont, CA (US);
Ligang Wang, San Jose, CA (US);
Byron R Cocilovo, Boulder, CO (US);
Francesco Aieta, Alameda, CA (US);
Brandon Born, Sunnyvale, CA (US);
Se Baek Oh, Hillsborough, CA (US);
Graham B Myhre, Campbell, CA (US);
Zhibing Ge, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A display may include a waveguide, an input coupler having a first surface relief grating (SRG) in a substrate on the waveguide, a cross-coupler having a second SRG in the substrate, and an output coupler having a third SRG in the substrate. The display may direct light to an eye box. A capping layer may be disposed over the substrate. An anti-reflective coating may be disposed over the capping layer. Microstructures may be disposed in non-SRG regions of the substrate and may be non-diffractive at visible wavelengths. The microstructures may include grooves and may have a similar filling factor to the SRGs. This may cause portions of the capping layer over the microstructures to sink into the grooves, thereby providing the capping layer with a relatively uniform thickness across a lateral area of the waveguide, without the microstructures producing visible artifacts or interacting with the light.