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:
Jan. 06, 2015
Filed:
Jul. 02, 2010
Kenichi Yoshimura, Osaka, JP;
Kohsei Takahashi, Osaka, JP;
Hiroshi Fukunaga, Osaka, JP;
Naoto Hirosaki, Tsukuba, JP;
Kenichi Yoshimura, Osaka, JP;
Kohsei Takahashi, Osaka, JP;
Hiroshi Fukunaga, Osaka, JP;
Naoto Hirosaki, Tsukuba, JP;
Sharp Kabushiki Kaisha, Osaka-shi, JP;
Independent Administrative Institution, National Institute for Materials Science, Tsukuba-shi, JP;
Abstract
A semiconductor light-emitting device that is high in luminous efficiency and that emits light which is high in color rendering property includes a semiconductor light-emitting element that emits blue light; a green fluorescent substance that absorbs the blue light and emits green light; and an orange fluorescent substance that absorbs the blue light and emits orange light, fluorescence emitted by the green fluorescent substance and the orange fluorescent substance having an emission spectrum that has a peak wavelength of not less than 540 nm and not more than 565 nm and that satisfies the relation of 0.70>PI(90)/PI(MAX)>0.55, where PI(MAX) represents an emission intensity at the peak wavelength, and PI(90) represents an emission intensity at a wavelength 90 nm longer than the peak wavelength.