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:
Nov. 26, 2002
Filed:
Feb. 29, 2000
Applicant:
Inventors:
Assignee:
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 6/167 ; H01J 6/130 ;
U.S. Cl.
CPC ...
H01J 6/167 ; H01J 6/130 ;
Abstract
To provide a lamp device that is a point light source, that withstands high pressure, and that produces high-intensity light, a high-frequency excitation point light source lamp device has been devised having a discharge vessel made of a transparent, non-conductive material and having an expanded part forming a discharge space and with tubules joined to the expanded part; at least one discharge concentrator, that concentrates the electrical field within the discharge space of the expanded part, which is supported in a tubule with an end within the discharge space; and a high-frequency supply external to the lamp for providing excitation energy that excites a discharge of the concentrator.