Headset and head-mounted display
US11402637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2019 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Apr 18, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0143
- WIPO fieldOptics
- WIPO sectorInstruments
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 λ1, but not a different second wavelength λ2, 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 λ2, but not the first wavelength λ1, into zero and first diffraction orders having intensities within 5% of each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.