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:
Mar. 29, 2005
Filed:
Nov. 15, 2001
Koji Kawai, Hamamatsu, JP;
Yoshinobu Ito, Hamamatsu, JP;
Koji Kawai, Hamamatsu, JP;
Yoshinobu Ito, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
In order to obtain light of a high luminance in a gas discharge tube of the present invention, a discharge path is narrowed by a first openingand a second openingin collaboration. Further, in order to provide favorable startability in a lamp even when the discharge path is narrowed, a predetermined voltage is applied from the outside to first and second discharge path limiting portionsAs a result, an active starting discharge which is capable of passing through the first and second openings is produced between a cathode portionand the first and second discharge path limiting portionsand thus discharge between the cathode portionand an anode portionis started speedily. Further, the anode portion, cathode portion, first discharge path limiting portion, and second discharge path limiting portion are housed within a light-emitting portion assemblyand electrically connected by first through fourth stem pinsA toD, and the stem pins are utilized effectively to support the light-emitting portion assembly.