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. 18, 2007
Filed:
Jul. 28, 2004
Hiroyuki Sato, Tokyo, JP;
Shuichi Taya, Tokyo, JP;
Hiroyuki Sato, Tokyo, JP;
Shuichi Taya, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
A wavelength-converting LED can include a light-emitting section in which an exciting element emits a blue or ultraviolet light. A fluorescent material that has a mean particle diameter Dranging from 5 μm to 20 μm and that can convert at least part of the light emitted from the exciting element into light having a wavelength longer than an exciting wavelength, can be incorporated into the LED. A dispersing agent with a mean particle diameter Dnot less than 1/10 of the mean particle diameter Dof the fluorescent material is preferably incorporated in the LED. A binder base material can be arranged to contain the fluorescent material, the dispersing agent and a binder therein. The sum of the weights of the fluorescent material and the dispersing agent is preferably in the range of 20% to 60% by weight of said binder base material to prevent the fluorescent material from precipitating in the binder base material upon curing.