Nonimaging light source
US5001609A · kind A · utility
128Cited by
21References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The principles of non-imaging optics, rather than imaging optics, are used to provide a high power LED illumination lamp that has a specified limited viewing angle. A compound parabolic flux extractor extracts and concentrates light emitted by an LED chip and a light pipe continues the concentration into the specified viewing angle. A lens or a diffusant may be used to modify the light output of the lamp. A light constructed as an array of the lamps is suitable for use as an automobile external light such as a center high mounted stop light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.