Led bulb refractive relector
US7524091B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jan 2, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light guide may be made from a plurality of substantially planar, light transmissive arms paralleling and radiating from a common axis. The planar arms in combination define a common cavity extending along the axis sufficiently large to envelope a light source. At least one arm has an input window facing the common cavity, a reflective wall aligned with respect to the common cavity and an input window. Light received from the direction of the common cavity through the input window is generally reflected in an axial direction. The light guide has an output window extending from an intersection point with the reflective wall towards the axis. The plurality of arms is preferably supported on a base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.