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:
Jan. 16, 2018
Filed:
Feb. 19, 2016
Applicant:
Renesas Electronics Corporation, Tokyo, JP;
Inventors:
Assignee:
Renesas Electronics Corporation, Koutou-ku, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 33/08 (2006.01);
U.S. Cl.
CPC ...
H05B 33/0851 (2013.01); H05B 33/0815 (2013.01); Y02B 20/347 (2013.01);
Abstract
An LED lighting deviceaccording to this embodiment includes a lighting circuit that supplies a current to an LED, and a dimmerthat generates a PWM signal for controlling the supply of the current to the LED from the lighting circuit, in which the dimmerfeedback-controls the PWM signal that controls the supply of the current to the LED by comparing the output current to be output to the LED with a target current and feedforward-controls the PWM signal according to a fluctuation of an input voltage from a commercial power supply