Dimming drive circuit of alternating current directly-driven LED module

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United States of America Patent

PATENT NO 9860958
APP PUB NO 20160150618A1
SERIAL NO

14958744

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Disclosed is an alternating current dimming drive circuit for an LED, comprising a rectification unit and N stages of LED direct current drive circuits. In the ith stage of LED direct current drive circuit, a first end of the ith voltage sampling unit and an input end of the ith LED light source module directly or indirectly receive the output voltage of the rectification unit; a voltage division end of the ith voltage sampling unit is connected to a second input end of the ith switch unit; and a first input end of the ith switch unit is connected to an output end of the ith LED light source module, and an output end of the ith switch unit, a second end of the ith voltage sampling unit and a second output end of the rectification unit are grounded. When the ith switch unit is switched on, the first to the ith LED light source modules emit light. When the ith switch unit is switched off, if i is less than N, the first to the (i+1)th LED light source modules emit light, and if i is equal to N, the first to the Nth LED light source modules stop emitting light. The present invention realizes an alternating current directly-driven LED light source module and will not flicker in the case of alternating current voltage fluctuation.

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Patent Owner(s)

Patent OwnerAddress
SICHUAN SUNFOR LIGHT CO LTDNO 2 XINDA ROAD HI-TECH (WEST) ZONE CHENGDU SICHUAN 611731

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Feng, Zhengyong Sichuan, CN 10 45
Li, Dongming Sichuan, CN 72 823
Long, Wentao Sichuan, CN 11 28
Yang, Mian Sichuan, CN 13 57

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