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:
Aug. 26, 2014
Filed:
Nov. 19, 2010
Shinichi Suzuki, Nagano, JP;
Shinichi Suzuki, Nagano, JP;
Minebea Co., Ltd, Nagano, JP;
Abstract
An LED driving circuit includes a dimming circuit that controls a conducting angle of an alternating current supplied from a power supply to phase-control a current to be supplied to an LED, a rectifier circuit that rectifies an alternating-current voltage output from the dimming circuit, a smoothing circuit that smoothes a direct current voltage output from the rectifier circuit, a switching device that is connected with the LED in series; a constant current control circuit that outputs a high frequency pulse signal to the switching device to control the switching device, and a bleeder circuit that is provided between an output terminal of the rectifier circuit and a ground and that has a bleeder resistance and a bleeder switch connected in series. The high frequency pulse signal is input to the bleeder switch so that a bleeder current having a high frequency pulse form flows in the bleeder resistance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile