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:
Apr. 12, 2022
Filed:
Aug. 15, 2019
Suzhou Regu. Technology Inc., Jiangsu, CN;
Shengming Huang, Suzhou, CN;
Duoli Feng, Suzhou, CN;
Tao Huang, Suzhou, CN;
Tian Guo, Suzhou, CN;
Weidong Li, Suzhou, CN;
SUZHOU REGU. TECHNOLOGY INC., Jiangsu, CN;
Abstract
A drive circuit for flicker-free LED lighting having a high power factor, the circuit comprising a start-up circuit, a controller, a transformer T, a first current switch, and a second current switch. The transformer Tcomprises a main primary winding Np, a primary winding Np, a primary winding Na, and a secondary winding Ns. The main primary winding Npand the primary winding Npare in-phase, the primary winding Na and the secondary winding Ns are in-phase, and phases of the main primary winding Npand the secondary winding Ns are inverted. The start-up circuit and the transformer Tare connected to an input terminal Vin. The start-up circuit, the first current switch, and the second current switch are connected to the controller. The controller controls, by means of controlling the first current switch, and the second current switch to turn on or off, an output current of the secondary winding Ns of the transformer T. The drive power supply circuit for LED lighting having a high power factor reduces ripples in an output current, thereby realizing advantages of a high power factor, being flicker-free, and having a low cost, etc., for LED lighting.