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:
Jun. 28, 2016
Filed:
Oct. 04, 2012
Citizen Holdings Co., Ltd., Tokyo, JP;
Citizen Electronics Co., Ltd., Yamanashi, JP;
CITIZEN HOLDINGS CO., LTD., Tokyo, JP;
CITIZEN ELECTRONICS CO., LTD., Yamanashi, JP;
Abstract
The purpose of the invention is to obtain, with a simple circuit configuration, an LED illumination device having an LED column driven by a pulsating voltage, capable of lighting with little flicker, and also having lighting control capability. The LED illumination device () comprises: an LED column () including a plurality of LEDs () connected in series; a rectifier () receiving an AC power supply () and outputting a pulsating voltage to the LED column (); a current limit circuit () connected to the LED column () in series and having resistor elements (to); and a control circuit () for controlling the current flowing through the LED column () by controlling the resistor elements (to) and thereby controlling the lighting of the LED column ().