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:
May. 26, 2009
Filed:
Sep. 21, 2006
Seiichi Tokunaga, Suita, JP;
Seiichi Tokunaga, Suita, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A light emitting device includes a light emitting element which emits light with a first wavelength; and a light emitting conversion unit for converting the light with the first wavelength by using wavelength conversion materials including a short wavelength conversion material and a long wavelength conversion material, the short wavelength conversion material being that which emits light with a second wavelength longer in wavelength than the light with the first wavelength, by absorbing the light with the first wavelength, and the long wavelength conversion material being that which emits light with a wavelength longer than the second wavelength by absorbing the light with the first wavelength. A proportion of the short wavelength conversion material of the wavelength conversion materials included in a first region is smaller than that of the short wavelength conversion material of the wavelength conversion materials included in the entire light emitting conversion unit, and a proportion of the short wavelength conversion material of the wavelength conversion materials included in a second region is larger than that of the short wavelength conversion material of the wavelength conversion materials included in the entire light emitting conversion unit.