Display device and light guide plate
US10775544B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2018 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Apr 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display device includes a light guide plate 2 having at least one incoming surface and a plurality of light sources (3-1 to 3-4) arranged to face any of the incoming surfaces. The light guide plate 2 has a plurality of prisms 11 that is arrayed along each pattern in a plurality of patterns (21 to 24) displayed on one surface 2b of the light guide plate and reflects light emitted from a light source corresponding to the pattern and entering the light guide plate through the incoming surface toward a direction within a prescribed range of angles with reference to a direction normal to the other surface 2c of the light guide plate. Each prism 11 is formed as a triangular pyramid groove in one surface of the light guide plate 2, and one of inclined surfaces of the triangular pyramid groove is formed as a reflective surface 11a that reflects light emitted from a light source corresponding to a pattern along which the prism is arrayed and entering the light guide plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.