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:
Jan. 10, 2012
Filed:
Jul. 27, 2007
Applicant:
Keiji Hayashi, Kameyama, JP;
Inventor:
Keiji Hayashi, Kameyama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 7/44 (2006.01); H01J 13/46 (2006.01); H01J 17/34 (2006.01); H01J 19/78 (2006.01); H01J 23/16 (2006.01); H01J 29/96 (2006.01); H01K 1/62 (2006.01);
U.S. Cl.
CPC ...
Abstract
A cold cathode tube lamp which can be lighted easily when the ambient temperature is low. The cold cathode tube lamp comprises discharge tubes having a pair of electrodes and being driven when a voltage having an AC component is supplied thereto, and ballast capacitors connected with at least one of the pair of electrodes. The ballast capacitor is arranged to come into thermal contact with the discharge tube and to increase the capacitance as the surface temperature of the ballast capacitor decreases.