Switchable privacy display
US12253748B2 · kind B2 · utility
0Cited by
110References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2024 |
| Grant date | Mar 18, 2025 |
| Priority date | — |
| Expiry date | May 1, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13439
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A switchable privacy display device comprises a spatial light modulator and a switchable diffractive view angle control retarder arrangement arranged between a display polariser of the spatial light modulator and an additional polariser. The display achieves high image visibility to an off-axis user in a share mode of operation and high image security to an off-axis snooper in privacy mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.