Incandescent light power controller with predetermined off-state impedance
US7098610B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2005 |
| Grant date | Aug 29, 2006 |
| Priority date | — |
| Expiry date | Feb 20, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B39/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An incandescent light bulb life extender circuit is designed to attach to the screw base of a conventional light bulb or incorporated in series with the AC powering the bulb. The circuit employs a bidirectional semiconductor switch that reduces the brightness of the bulb marginally while significantly extending the bulb's life. The values of the life extender are selected to operate with standard available light dimmers with no undesirable flicker or compromise of reasonable brightness control. A controller consists of the life extending circuit and a) an appropriate molded insulating housing, b) electrically conductive metallic discs for making electrical contacts to a light bulb base and corresponding socket and c) selected electronic components, connected to said discs, to facilitate the intended electrical performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.