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. 28, 2010
Filed:
Aug. 06, 2007
Hideo Nagai, Osaka, JP;
Masa-aki Suzuki, Osaka, JP;
Tadaaki Ikeda, Kagoshima, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A light-emitting device () having a base () and a light-emitting element () placed on the base () includes a first sealing material layer () covering the light-emitting element () and a second sealing material layer () surrounding a side surface of the first sealing material layer (), wherein the refractive index of the first sealing material layer () and the refractive index of the second sealing material layer () are different from each other. The light-emitting device () is capable of controlling a radiation pattern from the light-emitting element () by controlling the refractive index of the first sealing material layer () and the refractive index of the second sealing material layer (). This can facilitate the miniaturization and reduction in thickness of the light-emitting device (), and prevent the decrease in a light output efficiency of the light-emitting device ().