Display backlight with transparent light guide
US11899236B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2021 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Apr 9, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transparent light source system for a display device comprises a light source, and a light guide plate which includes an incident surface opposite to the light source, an upper surface, a lower surface parallel to the upper surface, and a lateral surface opposite to the incident surface. An outer light guide film is disposed outside the upper surface, first optical micro-structures allowing light transmitted in the light guide plate to be emitted from the upper surface are disposed on the upper surface, second optical micro-structures opposite to the first optical micro-structures are disposed on an inner surface of the outer light guide film, and the second optical micro-structures allow light emitted out of the first optical micro-structures to be emitted from an outer surface of the outer light guide film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.