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. 11, 2017
Filed:
Nov. 13, 2013
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Akira Takahashi, Osaka, JP;
Kazuhiko Itoh, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H05B 37/00 (2006.01); H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0845 (2013.01); H05B 33/0815 (2013.01); H05B 33/0818 (2013.01); Y02B 20/383 (2013.01);
Abstract
A drive circuit () according to the present invention is a drive circuit which causes an LED module () to emit light, using a dimming signal which is an alternating current signal which has been phase-controlled in response to a dimming level, the drive circuit () including a control signal generating unit () which integrates a voltage of a rectified dimming signal to generate a control signal for controlling the luminance of the LED module (), the voltage being greater than or equal to a first voltage and less than or equal to a second voltage less than a maximum voltage of the dimming signal.