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:
Dec. 08, 2009
Filed:
Feb. 09, 2006
Toshihide Maeda, Kagoshima, JP;
Shozo Oshio, Hirakata, JP;
Katsuaki Iwama, Suita, JP;
Hiromi Kitahara, Kagoshima, JP;
Tadaaki Ikeda, Kagoshima, JP;
Hidenori Kamei, Fukuoka, JP;
Yasuyuki Hanada, Fukuoka, JP;
Kei Sakanoue, Fukuoka, JP;
Toshihide Maeda, Kagoshima, JP;
Shozo Oshio, Hirakata, JP;
Katsuaki Iwama, Suita, JP;
Hiromi Kitahara, Kagoshima, JP;
Tadaaki Ikeda, Kagoshima, JP;
Hidenori Kamei, Fukuoka, JP;
Yasuyuki Hanada, Fukuoka, JP;
Kei Sakanoue, Fukuoka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A chip-type light-emitting semiconductor device includes: a substrate; a blue LEDmounted on the substrate; and a luminescent layermade of a mixture of yellow/yellowish phosphor particlesand a base material(translucent resin). The yellow/yellowish phosphor particlesis a silicate phosphor which absorbs blue light emitted by the blue LEDto emit a fluorescence having a main emission peak in the wavelength range from 550 nm to 600 nm, inclusive, and which contains, as a main component, a compound expressed by the chemical formula: (SrBaCaEu)SiO(0≦a1≦0.3, 0≦b1≦0.8 and 0<x<1). The silicate phosphor particles disperse substantially evenly in the resin easily. As a result, excellent white light is obtained.