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:
Oct. 20, 2015
Filed:
Jun. 27, 2013
Panasonic Corporation, Osaka, JP;
Yuji Yoshimoto, Hyogo, JP;
Katsunobu Hamamoto, Osaka, JP;
Hiroyuki Asano, Hyogo, JP;
Masafumi Yamamoto, Hyogo, JP;
Abstract
An LED lighting device includes: a resistor Rconfigured to output a detection value of an inductor current Iflowing through an inductor Lduring an ON period of a switching element Q; a threshold generation sectionconfigured to generate a threshold value Vs of the inductor current Icorresponding to a dimming level; and a switching control sectionconfigured to control the switching element Qto turn on and off. The switching control sectionis configured to determine an OFF timing of the switching element Qbased on comparison between the detection value and the threshold value Vs of the inductor current I. The LED lighting device increases a period of a switching cycle of the switching element Qwith decrease of the dimming level.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile