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:
Mar. 20, 2007
Filed:
Feb. 25, 2005
Shingo Matsuura, Shiga, JP;
Shingo Matsuura, Shiga, JP;
Kyocera Corporation, Kyoto, JP;
Abstract
A light-emitting apparatus includes a light-emitting element, a base body, a reflection member and a fluorescent material layer. A cross section of the inner surface of the reflection member cut by a virtual plane including a virtual axis penetrating a center of the inner surface and perpendicular to the upper principal surface of the base body has a sectional profile defined by a curved line expressed by the following formula, and the inner surface of the reflection member is a curved surface obtained by rotating the curved line about the virtual axis: Z=(cr)/[1+{1−(1+k)cr}] (where −10≦k≦−0.001, 0.001≦c≦10). An angle θwhich is made by an upper surface of the fluorescent material layer and a line which connects one corner of a light-emitting portion of the light emitting element with an uppermost position of the inner surface and is tangent to the one corner, is given as θ≧90°−sin(1/n).