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:
Feb. 25, 2014
Filed:
Oct. 01, 2010
Guichao Hua, Zhejiang, CN;
Xiaoli Yao, Zhejiang, CN;
Liangan GE, Zhejiang, CN;
Lijun Ren, Zhejiang, CN;
Guichao Hua, Zhejiang, CN;
Xiaoli Yao, Zhejiang, CN;
Liangan Ge, Zhejiang, CN;
Lijun Ren, Zhejiang, CN;
Inventronics (Hangzhou), Inc., Hangzhou, CN;
Abstract
A circuit to improve the power factor of a power supply at light load, the circuit including a rectifier bridge, a filter positioned before or after the rectifier bridge, a logic control and power drive circuit, a switching transistor, a light load detecting circuit configured to output a control signal to the logic control and power drive circuit which controls the switching transistor to conduct when a heavy load is experienced and to cut off when a light load is experienced, in order to control the working status of the filter capacitor, and a power factor correction circuit.