Backlight module for protecting privacy
US11506827B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2022 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | May 25, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The backlight module includes the following units. Multiple first light emitting units are disposed on a top surface of a transparent substrate. A beam angle of the first light emitting units is greater than or equal to 30 degrees and less than or equal to 45 degrees. Multiple second light emitting units and a light guide plate are disposed on a bottom surface of the transparent substrate. Each second light emitting unit is disposed in a respective hole of the light guide plate. A light intensity of the first light emitting units in a first mode is smaller than that in a second mode. A light intensity of the second light emitting units in the first mode is greater than that in the second mode. In this way, the purpose of privacy protection can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.