DRIVING DEVICE AND METHOD FOR DIMMING LIGHT EMITTING DIODE (LED)

Title:

DRIVING DEVICE AND METHOD FOR DIMMING LIGHT EMITTING DIODE (LED)

Document Type and Number:

WIPO Patent Application WO/2014/110840

Kind Code:

A1

Abstract:

The present invention provides a driving device and method for dimming the LEDs. The device comprises a dimming switch, and the dimming switch controls the connection or interruption of an LED path. The device further comprises: a boost circuit electrically connected with the LED path; a comparator electrically connected with the boost circuit and receiving triangular wave signals to generate pulse-width modulation (PWM) signals which controls the boost circuit; and a resistor-capacitor (RC) circuit electrically connected with the comparator and used for outputting a charging curve signal to the comparator when the dimming switch is switched off to improve the noise and electromagnetic interference of the boost circuit.

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Inventors:

HU ANLE (CN)
YANG XIANG (CN)
ZHANG HUA (CN)

Application Number:

PCT/CN2013/070857

Publication Date:

July 24, 2014

Filing Date:

January 22, 2013

Export Citation:

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Assignee:

SHENZHEN CHINA STAR OPTOELECT (CN)

International Classes:

H05B37/02; H05B44/00

Foreign References:

CN101795517A	2010-08-04
CN102036442A	2011-04-27
CN102810984A	2012-12-05
CN102695319A	2012-09-26
CN102821511A	2012-12-12
US20120181941A1	2012-07-19

Attorney, Agent or Firm:

ESSEN PATENT&TRADEMARK AGENCY (CN)
深圳翼盛智成知识产权事务所(普通合伙) (CN)

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