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, 2009
Filed:
Jun. 29, 2005
Hideaki Kaneda, Ibaraki, JP;
Naoto Kijima, Kanagawa, JP;
Eiji Hattori, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
A light emitting device for enhancing emission efficiency and color rendering, comprising: a light source; a first emitting section having a luminescent material emitting light including a wavelength component longer than that of light from the light source when excited by the light from the light source; a second emitting section having a luminescent material emitting light including a wavelength component longer than that of the light from the first emitting section when excited by the lights from the light source and the first emitting section; and a light exit side from which the light from the light source, the first light-emitting section and the second light-emitting section emerges outside; and the first emitting section and the second emitting section are opened at the light exit side, and an area of a boundary surface between the first emitting section and the second emitting section is equal to or less than fifty percent of the surface area of the first emitting section.