LED lighting system with helical fiber filament
US7618175B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2007 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Jul 30, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lighting system includes a housing, a light-transmitting top member positioned across an open top of the housing, a light source positioned in the housing, a helical fiber biased between the light source and the top member, and an adjustment means for adjusting the compression of the helical fiber. The helical fiber is light-transmitting and is doped with a first wavelength-converting material. A portion of the light emitted by the light source passes through open space between turns of the helical fiber, and a portion of the light emitted by the light source is received by the helical fiber and converted into a light of a predetermined color. Adjusting the compression of the helical fiber changes the relative portions of the light that passes through the open space between the turns of the helical fiber and the light received by the helical fiber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.