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. 04, 2014
Filed:
Apr. 22, 2010
Hirokazu Otake, Yokosuka, JP;
Takuro Hiramatsu, Yokosuka, JP;
Hiroshi Terasaka, Yokosuka, JP;
Mitsuhiko Nishiie, Yokosuka, JP;
Hiromichi Nakajima, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Hirokazu Otake, Yokosuka, JP;
Takuro Hiramatsu, Yokosuka, JP;
Hiroshi Terasaka, Yokosuka, JP;
Mitsuhiko Nishiie, Yokosuka, JP;
Hiromichi Nakajima, Yokosuka, JP;
Masahiko Kamata, Yokosuka, JP;
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
A light-emitting device and an illumination apparatus are disclosed. A plurality of LED elements are connected in series between positive and negative lines, and first bypass capacitor is connected in parallel to the LED elements respectively. Each series circuit of a predetermined number of LED elements is connected in parallel to second bypass capacitors. As a result, with the negative power line set as a grounding point, the AC impedance at connection points of the series circuit of the LED elements against the ground is reduced. Thus, the erroneous lighting or 'flicker' of each LED which otherwise might be caused by an external noise is prevented.