Anti-peeping device, anti-peeping display and control method
US10948750B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 24, 2018 |
| Grant date | Mar 16, 2021 |
| Priority date | — |
| Expiry date | Sep 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/307
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An anti-peeping device, an anti-peeping display, and a control method. The anti-peeping device comprises an external light source, a grating mirror structure, and a first controller coupled to the grating mirror structure. The external light source is configured to emit light towards the grating mirror structure, and the first controller is configured to control the grating mirror structure to rotate such that light emitted from the external light source towards the grating mirror structure is reflected to a first direction by the grating mirror structure, the first direction deviating from a normal perpendicular to the horizontal plane of the grating mirror structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.