Efficient luminaire with directional side-light extraction
US7549783B2 · kind B2 · utility
25Cited by
31References
13Claims
0Family size
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Key dates
| Filing date | Apr 5, 2006 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Nov 19, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21W2131/305
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Luminaire with directional side-light extraction comprises a light pipe with a light-carrying core, and with a light-extraction structure along a first longitudinal side of the luminaire, confined to a radial swath of the luminaire, along the longitudinal axis of the luminaire, of substantially less than 180°. The second end of the light pipe has light-saving means for directing saved light from the second end towards the first end. The light-extraction means is adjustable to accommodate angular distributions of light from various light sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.