Light distribution using a light emitting diode assembly
US7926975B2 · kind B2 · utility
146Cited by
626References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Apr 19, 2011 |
| Priority date | — |
| Expiry date | Mar 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluorescent light tube retrofit with light emitting diodes (LEDs) that evenly distribute light to avoid bright spots is disclosed. One LED lighting unit includes a tubular housing and a plurality of LED assemblies mounted about a circumference of the tubular housing. LEDs face inward from a mounting surface that is angled offset of the tube. Alternatively, at least one LED can be oriented to emit light parallel to a tangent of the housing into a light pipe that curves inside at least a portion of the tubular housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.