Side-edge type surface light emitting apparatus having light guide plate sandwiched by upper and lower prism sheets
US10684405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2019 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | Apr 24, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0058
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A side-edge type surface light emitting apparatus includes: a light guide plate having a first light emitting surface, a light distribution controlling surface opposing the first light emitting surface and a light incident surface; a light source disposed on the light incident surface; a first prism sheet having multiple first prisms opposing the first light emitting surface and a second light emitting surface opposing the multiple first prisms; a light absorbing sheet opposing the light distribution controlling surface; and a second prism sheet having a flat surface opposing the light distribution controlling surface and multiple second prisms opposing the light absorbing sheet, the multiple second prisms being perpendicular to the light incident surface of the light guide plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.