Illuminating device
US7695179B2 · kind B2 · utility
8Cited by
10References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 16, 2007 |
| Grant date | Apr 13, 2010 |
| Priority date | — |
| Expiry date | Dec 3, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21S43/247
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illuminating device has a light pipe that is elongate in shape and has a light-emitting face running in the direction of a longitudinal axis. A light-reflecting face is disposed opposite the light-emitting face, and the light-reflecting face has a plurality of prismatic cuts. Each prismatic cut includes a front face oriented at an angle B from a normal axis, the normal axis being 90 degrees from the longitudinal axis of the light pipe. The angle B is in the range of about 5 degrees to about 45 degrees and is such that it allows light to refract through at least one prismatic cut and then be internally reflected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.