Lamp
US8628221B2 · kind B2 · utility
1Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2011 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Jan 28, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp comprises a base, at least one light source arranged on the base, a cover positioned on the base and covering the light source, and a structured film arranged adjacent to the light source. The structured film has at least one micro structure configured for guiding part of the light backward emitted from the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.