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. 17, 2006
Filed:
Aug. 29, 2003
Keiji Hayashi, Kawasaki, JP;
Tetsuya Kobayashi, Kawasaki, JP;
Toshihiro Suzuki, Kawasaki, JP;
Tetsuya Hamada, Kawasaki, JP;
Mari Sugawara, Kawasaki, JP;
Keiji Hayashi, Kawasaki, JP;
Tetsuya Kobayashi, Kawasaki, JP;
Toshihiro Suzuki, Kawasaki, JP;
Tetsuya Hamada, Kawasaki, JP;
Mari Sugawara, Kawasaki, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
There is provided a light source device, used in a display device and the like, having a high light emitting efficiency. The light source device has an electric discharge tube containing mercury and electrodes at both ends. A heat conducting member is attached to and is in contact with a part of the electric discharge tube. The heat conducting member locally cools the tube. The heat conducting member and the tube satisfy the following relationship, 6×10(m·k)/S<(1/k1−1/k2)W, where a cross sectional area of the electric discharge tube is S (m), an amount of generate heat per unit length of the electric discharge tubes is W (W/m), heat conductivity of the non-cooling part is k1 (W/K/m), and heat conductivity of the cooling part is defined as k2 (W/K/m).