Light emitting module and planar light source
US11029561B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2020 |
| Grant date | Jun 8, 2021 |
| Priority date | — |
| Expiry date | Jun 24, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133606
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An upper face of a light guide includes a projected portion that has a planar face, and a wall portion that surrounds the projected portion, wherein a top part of the wall portion is positioned higher than the planar face. A lower face of the light guide has a recessed portion. A light transmitting part that has a lower refractive index than a reflective index of the light guide is disposed on the projected portion in an area surrounded by the wall portion. A light source is disposed in the recessed portion. The projected portion has an oblique face which is oblique to the planar face and disposed between the planar face and the wall portion. In a plan view of the planar face of the projected portion, the oblique face of the projected portion is positioned outward of a lateral face of the recessed portion at least in part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.