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:
Aug. 02, 2022
Filed:
Apr. 18, 2019
3m Innovative Properties Company, St. Paul, MN (US);
Brett J. Sitter, Cottage Grove, MN (US);
Zhaohui Yang, North Oaks, MN (US);
James A. Thielen, Hugo, MN (US);
Byoung Kyu Kim, Busan, KR;
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Abstract
Headsets and head-mounted displays including first and second diffractive elements are described. In some cases, the first and second diffractive elements include first and second grating surfaces, and for at least one wavelength, the first and second grating surfaces have at least one different corresponding diffractive property. The head-mounted display may include two-dimensionally pixelated adjacent first and second display surfaces for displaying images, and first and second diffractive elements disposed adjacent the respective first and second display surfaces. In some cases, the first diffractive element is configured to diffract a first wavelength λ, but not a different second wavelength λ, into zero and first diffraction orders having intensities within 5% of each other, and the second diffractive element is configured to diffract the second wavelength λ, but not the first wavelength λ, into zero and first diffraction orders having intensities within 5% of each other.