The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 02, 2018
Filed:
Dec. 03, 2015
Sichuan Sunfor Light Co., Ltd., Sichuan, CN;
Dongming Li, Sichuan, CN;
Wentao Long, Sichuan, CN;
Zhengyong Feng, Sichuan, CN;
Mian Yang, Sichuan, CN;
Sichuan Sunfor Light Co., Ltd, Sichuan, CN;
Abstract
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 istage of LED direct current drive circuit, a first end of the ivoltage sampling unit and an input end of the iLED light source module directly or indirectly receive the output voltage of the rectification unit; a voltage division end of the ivoltage sampling unit is connected to a second input end of the iswitch unit; and a first input end of the iswitch unit is connected to an output end of the iLED light source module, and an output end of the iswitch unit, a second end of the ivoltage sampling unit and a second output end of the rectification unit are grounded. When the iswitch unit is switched on, the first to the iLED light source modules emit light. When the iswitch unit is switched off, if i is less than N, the first to the (i+1)LED light source modules emit light, and if i is equal to N, the first to the NLED 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.