Illumination device having a tapered light guide
US8721149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2012 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Jul 31, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1089
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure provides systems, methods and apparatus for illumination devices. In one aspect, an illumination device having a longitudinal axis includes a light source and a light guide. The light guide has a peripheral edge, a transmissive illumination surface, a center portion, and an upper surface. The transmissive illumination surface is oriented perpendicular to the longitudinal axis and disposed between the center portion and the peripheral edge. The upper surface is oriented relative to the illumination surface to define an angle α therebetween. In some implementations, the angle α can be greater than 15 degrees, for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.