Optical element and light emitting device
US8740418B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Sep 16, 2009 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Sep 16, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is an optical element which suppresses generation of glare and a dark section and is applicable to planar light emission having improved light efficiency. A light emitting device is also provided. A light emitting device is provided with: a light transmitting member having a light inputting section having light inputted thereto, a first light guide section which guides light inputted to the inputting section to a reflecting surface, the reflecting surface which is arranged on the first light guide section on the side opposite to the light inputting side and totally reflects light which forms one linear path among inputted light, and a second light guide section which guides reflected light; and a light emitting member which inputs light to the inputting section. The first light guide section contains light scattering particles, which multiply scatter light and generate light that passes through the reflecting surface and is outputted to the external, and the second light guide section partially or entirely outputs inputted light to the same surface to which light passed through the reflecting surface is outputted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.