Spherical bulb for light-emitting diode with spherical inner cavity
US7663315B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Feb 16, 2010 |
| Priority date | — |
| Expiry date | Jul 2, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A bulb is adapted to fit over and around a light-emitting diode emitting a light of a first hue in a generally Lambertian radiation pattern. The bulb has a generally spherical shape and a substantially circular external cross-sectional geometry, and further defines an inner cavity with a substantially circular cross-sectional geometry for housing the light-emitting diode. The bulb is composed of a light-transmitting material and a light color-converting material, with the light color-converting material converting the light of the first hue into a light of a desired hue, which is then viewed along an external surface of said bulb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.