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. 14, 2004
Filed:
Apr. 28, 2003
Yuji Takahashi, Aichi-ken, JP;
Shigeru Fukumoto, Aichi-ken, JP;
Katsunori Arakane, Aichi-ken, JP;
Atsuo Hirano, Aichi-ken, JP;
Kunihiro Hadame, Aichi-ken, JP;
Kunihiko Obara, Kagoshima-ken, JP;
Toshihide Maeda, Kagoshima-ken, JP;
Hiromi Kitahara, Kagoshima-ken, JP;
Kenichi Koya, Kagoshima-ken, JP;
Yoshinobu Yamanouchi, Kagoshima-ken, JP;
Other;
Abstract
In a light emitting diode, a scattering material-containing light guiding/scattering layer is provided which directly receives light emitted from a light emitting element. The scattering material contained in the light guiding/scattering layer irregularly reflects and scatters the incident light. The scattered light is led to a fluorescence emitting layer formed of a transparent binder containing a phosphor material. The probability of incidence of light having high optical density, which has been emitted from the light emitting element, directly to the phosphor material contained in the fluorescence emitting layer is lowered, and light can be radiated from the whole fluorescence emitting layer. Therefore, uniform light having a desired color can be radiated with high efficiency from the light emitting diode.