Rainbow reduction in waveguide displays
US10761330B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2018 |
| Grant date | Sep 1, 2020 |
| Priority date | — |
| Expiry date | Dec 4, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0178
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A waveguide display includes a first substrate and one or more grating layers on a first surface of the first substrate. The one or more grating layers are configured to cause destructive interference between ambient light diffracted by at least two grating layers or between ambient light diffracted by different portions of one grating layer. In some embodiments, the waveguide display also includes an angular-selective transmissive layer. The angular-selective transmissive layer is configured to reflect, diffract, or absorb ambient light incident on the angular-selective reflective layer with an incidence angle greater than a threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.