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:
May. 18, 2010
Filed:
Aug. 28, 2007
Ying-chang Cheng, Taipei Hsien, TW;
Shih-hung Liu, Taipei Hsien, TW;
Ying-Chang Cheng, Taipei Hsien, TW;
Shih-Hung Liu, Taipei Hsien, TW;
Zippy Technology Corp., Hsin-Tien, Taipei Hsien, TW;
Abstract
A LED driving circuit mainly includes a commutation unit to transform an AC input cycle signal to a DC cycle signal, a switch unit which divides a driving power signal output to a LED and has a duty voltage value, a valley filled power factor correction circuit to receive the AC input cycle signal and stop conduction of the commutation unit when the voltage value of the AC input cycle signal is lower than a cutoff voltage value, and a piezoelectric inverter to receive the driving power signal of the switch unit and regulate the signal to an AC modulated power signal within a duty range of the LED to drive the LED to emit light.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile