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:
Sep. 18, 2012
Filed:
Mar. 17, 2006
Naoto Kijima, Yokohama, JP;
Yasuo Shimomura, Yokohama, JP;
Hideaki Kaneda, Ushiku, JP;
Kimiya Takeshita, Yokohama, JP;
Naoto Kijima, Yokohama, JP;
Yasuo Shimomura, Yokohama, JP;
Hideaki Kaneda, Ushiku, JP;
Kimiya Takeshita, Yokohama, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
To achieve a light-emitting device emitting light with high brightness, closer to natural light, and less color shift due to a small change in intensity of emitted light, in a light-emitting device including a light source emitting light by driving current and at least one wavelength-converting material absorbing at least part of the light from the light source and emitting light having a different wavelength, the color coordinate x(17.5) and the color coordinate y(17.5) of the light emitted at a driving current density of 17.5 A/cmand the color coordinate x(70) and the color coordinate y(70) of the light emitted at a driving current density of 70 A/cmsatisfy the following Expressions (D) and (E):−0.006≦(17.5)−(70)≦0.006  (D),−0.006≦(17.5)−(70)≦0.006  (E).