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:
Jun. 29, 2010
Filed:
Mar. 09, 2007
Kenji Teramoto, Tokyo, JP;
Kenji Teramoto, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A lighting unit of the present invention comprises a light guide board, a fluorescent discharge tube provided on a side surface of the light guide board, having an electrode portion at its end portion, a lead wire having a contact connected to the electrode portion of the fluorescent discharge tube, and a holder having a cavity therein and containing the end portion of the fluorescent discharge tube and the contact of the lead wire inside the cavity. The diameter of the cavity is larger than that of the fluorescent discharge tube. With this construction, the lighting unit can suppress heat dissipation at the end portion of the fluorescent discharge tube as compared with the background art and as a result, can suppress degradation in luminance of the fluorescent discharge tube due to long term use.