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:
Jan. 31, 2012
Filed:
Mar. 17, 2004
Jun Sakaguchi, Takatsuki, JP;
Syunsuke Ono, Takatsuki, JP;
Yoshitaka Kurimoto, Takatsuki, JP;
Toshiyuki Shimizu, Takatsuki, JP;
Shinichiro Hataoka, Katano, JP;
Kiyoshi Takahashi, Kyotanabe, JP;
Takashi Tsutatani, Ohtsu, JP;
Tomoyuki Seki, Takatsuki, JP;
Makoto Horiuchi, Sakurai, JP;
Tsuyoshi Ichibakase, Takatsuki, JP;
Jun Sakaguchi, Takatsuki, JP;
Syunsuke Ono, Takatsuki, JP;
Yoshitaka Kurimoto, Takatsuki, JP;
Toshiyuki Shimizu, Takatsuki, JP;
Shinichiro Hataoka, Katano, JP;
Kiyoshi Takahashi, Kyotanabe, JP;
Takashi Tsutatani, Ohtsu, JP;
Tomoyuki Seki, Takatsuki, JP;
Makoto Horiuchi, Sakurai, JP;
Tsuyoshi Ichibakase, Takatsuki, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A manufacturing method of a high-pressure mercury lamp includes an electric field application step in which an electric field is applied to at least a light emission part () with the high-pressure mercury lamp being kept at a high temperature. This can reduce impurities such as hydrogen and alkali metals in a discharge space () and glass forming the light emission part (). As a consequence, blackening and devitrification of the high-pressure mercury lamp while the lamp is lit can be reduced.