Optical stack for privacy display
US11287677B2 · kind B2 · utility
0Cited by
76References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2019 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Aug 14, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13471
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display apparatus comprises at least one spatial light modulator and at least one curved view angle control element that comprises plural retarders arranged between the display polariser of each spatial light modulator, and an additional polariser. The curvature of the view angle control element provides increased luminance uniformity for a head-on user and increased visual security to an off-axis snooper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.