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:
Jul. 08, 2014
Filed:
Sep. 20, 2011
Kozo Uemura, Yokosuka, JP;
Soichi Shibusawa, Yokosuka, JP;
Shuhei Matsuda, Yokosuka, JP;
Nobuhiko Betsuda, Yokosuka, JP;
Kiyoshi Nishimura, Yokosuka, JP;
Masatoshi Kumagai, Yokosuka, JP;
Kozo Uemura, Yokosuka, JP;
Soichi Shibusawa, Yokosuka, JP;
Shuhei Matsuda, Yokosuka, JP;
Nobuhiko Betsuda, Yokosuka, JP;
Kiyoshi Nishimura, Yokosuka, JP;
Masatoshi Kumagai, Yokosuka, JP;
Toshiba Lighting & Technology Corporation, Kanagawa, JP;
Abstract
A light-emitting device includes a substrate, and a plurality of light-emitting elements mounted on the substrate. The light-emitting elements are placed to meet conditions that the number B of light-emitting elements per unit area (cm) of a mounting part is not less than 0.4 and a mean mounting density D is not less than 58 to not greater than 334, when a relationship of formula 'D=A×B' is established, assuming D as a mean mounting density of light-emitting elements on a substrate, A as a current (mA) flowing through one light-emitting element, and B as the number of light-emitting elements per unit area (cm) of a substantial mounting part for light-emitting elements.