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:
Jul. 04, 2017
Filed:
Mar. 10, 2015
Zhejiang Shenghui Lighting Co., Ltd, Jiaxing, CN;
ZHEJIANG SHENGHUI LIGHTING CO., LTD, Jiaxing, CN;
Abstract
A power circuit for an LED lighting device including an AC power supply, a dimmer and a control circuit is provided. The control circuit includes a filtering unit configured to filter a voltage signal coming from the dimmer and a rectifying unit configured to receive the signal outputted from the filtering unit and rectify the signal to a DC signal. The control circuit also includes a transformer unit connected to the rectifying unit. Further, the control circuit includes a dimmer phase detection unit configured to sample the rectified voltage signal at point K and convert the voltage signal to a low voltage pulse signal and a flyback conversion unit configured to receive the pulse signal outputted by the dimmer phase detection unit and adjust a current flowed through the transformer unit and a first transistor to control the output current to the LED lighting device.