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:
Feb. 17, 2015
Filed:
Feb. 27, 2012
Yoshinobu Murakami, Osaka, JP;
Koji Nakagawara, Osaka, JP;
Masahito Ohnishi, Hyogo, JP;
Masahiro Naruo, Osaka, JP;
Shigeru Ido, Osaka, JP;
Kazuhiro Nisimoto, Osaka, JP;
Hiromitsu Mizukawa, Osaka, JP;
Yoshinobu Murakami, Osaka, JP;
Koji Nakagawara, Osaka, JP;
Masahito Ohnishi, Hyogo, JP;
Masahiro Naruo, Osaka, JP;
Shigeru Ido, Osaka, JP;
Kazuhiro Nisimoto, Osaka, JP;
Hiromitsu Mizukawa, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An illumination system includes a lighting apparatus having a solid-state light emitting element as a light source; and a dimmer including a bidirectional switching element having a self-sustaining function and connected to a serial circuit of the lighting apparatus and an external power source. The dimmer varies a conduction angle of the bidirectional switching element by controlling a phase of an AC voltage of the external power source, wherein the lighting apparatus performs dimming of the light source based on the conduction angle of the bidirectional switching element, and the dimmer continues to apply driving current to the bidirectional switching element during a first period, which is a part of a second period, the bidirectional switching element being allowed to conduct throughout the second period.