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:
Oct. 10, 2023
Filed:
Apr. 03, 2019
Snap Inc., Santa Monica, CA (US);
Mohmed Salim Valera, Abingdon, GB;
Snap Inc., Santa Monica, CA (US);
Abstract
An augmented reality display is disclosed. A colour projector () emits an image in a narrow beam comprising three primary colours: red, green and blue. A pair of waveguides () is provided in the path of the projected beam. A first input grating () receives light from the projector () and diffracts the received light so that diffracted wavelengths of the light in first and second primary colours are coupled into the first waveguide (), and so that diffracted wavelengths of the light in second and third primary colours are coupled out of the first waveguide in a direction towards the second waveguide (). A second input diffraction grating () receives light coupled out of the first waveguide () and diffracts the second and third primary colours so that they are coupled into the second waveguide ().