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:
Mar. 03, 2015
Filed:
Feb. 25, 2013
Toshiba Lighting & Technology Corporation, Yokosuka-shi, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Mitsuhiro Matsuda, Yokosuka, JP;
Naoko Iwai, Yokosuka, JP;
Hajime Osaki, Yokosuka, JP;
Hiroshi Kubota, Yokosuka, JP;
Takuro Hiramatsu, Yokosuka, JP;
Katsusuke Uchino, Yokosuka, JP;
Masatoshi Kumagai, Yokosuka, JP;
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A lighting circuit according to embodiments includes: a self-hold element connected in series to an AC power source that generates power for lighting an illumination load, together with the illumination load, the self-hold element being configured to control supply of the power provided by the AC power source to the illumination load by the self-hold element being turned on/off; a noise prevention circuit connected in parallel to the self-hold element; and a damping circuit configured to connect a damping resistance to the noise prevention circuit parallely only for a predetermined period from turning-on of the self-hold element, thereby preventing the self-hold element from being repeatedly turned on/off during a period in which the self-hold element is on under normal conditions, due to a transient during power supply.