Light emitting device and bulb-type LED lamp
US8591060B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Mar 17, 2010 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jun 20, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a light emitting device which can uniformly diffuse and radiate light from all the regions of the globe of an LED bulb without deteriorating light transmission efficiency. A light emitting device is provided with a light scattering/guiding globe and an LED which is disposed on one end of the light scattering/guiding globe. The light scattering/guiding globe is a body with no air released from the inside and is composed of a light scattering/guiding material having light scattering particles contained therein. The globe has the bottom surface on the side of the LED, and is provided with a first light incoming surface as a first hollow section, which is formed in a circular cone shape in the light outputting direction from the bottom surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.