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:
Jun. 26, 2012
Filed:
Jul. 14, 2008
Jun Sakaguchi, Osaka, JP;
Yoshiki Kitahara, Osaka, JP;
Katsuhiro Ono, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A short arc high-pressure discharge lamp has an arc tubemade of quartz glass including a light-emitting portionthat fills mercury inside thereof and has a pair of electrodes arranged so as to face each other, and a sealing portionconnected to the light-emitting portion. The pair of electrodes have an electrode bar, one end of the electrode bar is located in an internal space of the light-emitting portion, and the other end of the electrode bar is embedded in the sealing portion and bonded to a conductive metal-foilsealed in the sealing portion. In at least a part of a portion of the electrode bar embedded in the sealing portion, the entire outer peripheral surface thereof is covered tightly with a metal-foil sleeve. A high efficiency and high quality lamp is obtained in which fracture in the sealing portion of the arc tube caused by an ultrahigh vapor pressure in the tube surely is suppressed over the lifetime of the lamp, and the vapor pressure in the arc tube is elevated up to 30 MPa or more.