Illumination device
US9046238B2 · kind B2 · utility
1Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Feb 3, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination device including a base, at least one LED light source and a first diffusing element is provided. The base has a supporting plane. The LED light source disposed on the supporting plane has a light emitting surface substantially parallel to the supporting plane. The first diffusing element disposed on the supporting plane is a hollow column surrounding the LED light source. An inner diameter width of the first diffusing element is gradually reduced outward from the base. The first diffusing element has a rough surface comprising a plurality of surface structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.