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:
Sep. 08, 2026
Filed:
Jun. 14, 2024
Apple Inc., Cupertino, CA (US);
Jong Young Hong, Boulder, CO (US);
Lai Wang, Scotts Valley, CA (US);
Byron R Cocilovo, Boulder, CO (US);
Friso Schlottau, Mead, CO (US);
Apple Inc., Cupertino, CA (US);
Abstract
A display may include a waveguide having a grating medium sandwiched between first and second substrates. A cross-coupler can direct light in the waveguide towards an output coupler. The output coupler may include volume holograms in the medium. The output coupler may couple the light out of the waveguide and towards an eye box. The cross-coupler may include a surface relief grating (SRG). The SRG may diffract an entirety of the fields of view of different color channels of light incident upon the SRG from within a total internal reflection (TIR) range of the waveguide onto angles at opposing sides of a TIR transition angle of the waveguide. This may prevent the formation of unsightly dark bands in one or more of the color channels at the eye box.