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:
Aug. 07, 2007
Filed:
Sep. 15, 2005
Keisuke Nakazato, Ehime, JP;
Hidehiko Noguchi, Ehime, JP;
Koji Tanabe, Ehime, JP;
Makoto Deguchi, Ehime, JP;
Keisuke Nakazato, Ehime, JP;
Hidehiko Noguchi, Ehime, JP;
Koji Tanabe, Ehime, JP;
Makoto Deguchi, Ehime, JP;
Harison Toshiba Lighting Corporation, Ehime, JP;
Abstract
A metal halide lamp includes a translucent air tight vessel having a light emitting tube portion with an internal discharge space, and sealing portions formed on both sides. A discharge medium in the discharge space contains at least metal halide and rare gas. A pair of electrodes, one ends of which are sealed at sealing portion and the other end of which are arranged in the discharge space facing each other. The discharge space has a nearly circular shape in a cross section perpendicular to the tube axis and has a structure in which the discharge medium is accumulated between the electrodes. The light emitting tube portion has a wall thickness of a lower portion thinner than that of an upper portion. The metal halide lamp has a high luminous efficiency, a quick rise of light flux and an easy manufacturing ability.