Driving circuit with dimming controller for driving light sources
US8482219B2 · kind B2 · utility
65Cited by
31References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2011 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Dec 12, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller for controlling dimming of a light-emitting diode (LED) light source includes a switch monitoring pin, a current monitoring pin, and a control pin. The switch monitoring pin monitors an operation of a power switch which transfers an AC voltage to a rectifier when the power switch is on. The current monitoring pin receives a current monitoring signal indicating a current flowing through the LED light source. The control pin generates a control signal to control a second switch coupled in series with the LED light source to adjust the brightness of the LED light source according to the operation of the power switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.