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:
Oct. 16, 2012
Filed:
Sep. 06, 2011
Toshiaki Isogai, Osaka, JP;
Yasuhisa Ueda, Osaka, JP;
Kazushige Sugita, Hyogo, JP;
Hideo Nagai, Osaka, JP;
Takaari Uemoto, Osaka, JP;
Masahiro Miki, Osaka, JP;
Toshiaki Isogai, Osaka, JP;
Yasuhisa Ueda, Osaka, JP;
Kazushige Sugita, Hyogo, JP;
Hideo Nagai, Osaka, JP;
Takaari Uemoto, Osaka, JP;
Masahiro Miki, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A lampincludes a semiconductor light-emitting elementas a light source, a circuit unitthat causes the semiconductor light-emitting elementto emit light, and an envelopehaving an outer tubeand a base. The semiconductor light-emitting elementand the circuit unitare housed in the envelope. The semiconductor light-emitting elementis disposed in a region at a side of an axially central section of the outer tubefacing the baseand oriented so that a main emission direction points away from the base. At least one component of the circuit unitis disposed in a region at a side of the axially central section of the outer tube opposite the semiconductor light-emitting element. A light guidethat guides emission light of the semiconductor light-emitting elementalong the axial direction is disposed between the at least one component of the circuit unitand the semiconductor light-emitting element. The light guidehas a light-diffusing portion corresponding in position to the axially central section of the outer tube