Led lamp having a prismatically-cut modifier
US6296376A · kind A · utility
89Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V5/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED lamp includes a first optical member and a second optical member. The first optical member is for providing light from an LED chip, provided with at least one of a concave mirror and a dome lens, at an appropriate illumination angle. The second optical member is a lens positioned to receive light from the first optical part via an air layer. At least one surface of the second optical member is a prismatically cut surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.