Planar illumination device with light guide plate with pseudo light sources
US11506832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2019 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Dec 4, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2105/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A planar illumination device according to embodiments includes a substrate and a light guide plate. The substrate has a plurality of light sources arranged two-dimensionally. The light guide plate is disposed on a side of the surface of the substrate, the surface having the light sources. The light guide plate has a plurality of through holes disposed in a thickness direction and individually accommodating the light sources, and a pseudo light source. The pseudo light source is disposed such that another pseudo light source is not disposed on a line connecting the center of the pseudo light source and the center of one of the light sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.