Luminaire device that restricts light within an angular envelope
US7178946B2 · kind B2 · utility
18Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2005 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Aug 12, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A luminaire including a lamp, reflector, collimator and optional waveguide. The waveguide can be solid or hollow or include several serially-arranged total internal reflection (TIR) components for redirecting light that has entered the waveguide. In one embodiment, the TIR components are prisms, but are provided without metallized coatings thereby significantly reducing manufacturing costs. In another embodiment, components are arranged in a vertical orientation such that light is directed downward through a collimator or upward, either directly from the lamp or as a result of reflection from the reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.