Intensity control of LEDs interfacing three-way sockets
US9006997B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2013 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jun 28, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting diode (LED) lighting fixture is configured to interface a three-way socket and provide three levels of output light intensity. A detection unit determines whether one or both input voltages lines of the three-way socket are active and provides a control signal to an LED controller indicating which input voltage lines are active. The LED controller is configured to provide different output current levels to an LED bank based on whether one or both input voltage lines are active. By adjusting the output current level based on which input lines are active, the LED lighting fixture provides three output lighting intensity levels. LED lighting fixtures according to various embodiments can therefore serve as a direct replacement for three-way incandescent bulbs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.