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. 30, 2007
Filed:
Sep. 27, 2002
Yoshinobu Ito, Hamamatsu, JP;
Yoshinobu Ito, Hamamatsu, JP;
Hamatsu Photonics K.K., Shizuoka, JP;
Abstract
In a gas discharge tube, a first discharge path-induction portion is arranged between a first discharge path-limit portion and a second discharge path-limit portion. A voltage is applied to the first discharge path-induction portion from the outside. As a result, an active starting discharge capable of passing through a first opening of the first discharge path-limit portion is produced between a cathode portion and the first discharge path-induction portion. As a consequence, there is facilitated the discharge at a starting time to pass through a second opening. As a consequence, there is achieved a rapid starting of discharge between the cathode portion and an anode portion. Therefore, in order to achieve further enhancement of brightness, there can be carried out with ease a further miniaturization pertaining to the openings, in terms of its area size, of the discharge path-limit portion while the starting properties being kept excellent, without any increase in a voltage at the starting time of the lamp so much.