发明授权
- 专利标题: High pressure discharge lamp
- 专利标题(中): 高压放电灯
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申请号: US09575940申请日: 2000-05-23
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公开(公告)号: US06342764B1公开(公告)日: 2002-01-29
- 发明人: Yoshiharu Nishiura , Takashi Yamamoto , Kazuo Takeda , Shiki Nakayama , Hiroshi Nohara
- 申请人: Yoshiharu Nishiura , Takashi Yamamoto , Kazuo Takeda , Shiki Nakayama , Hiroshi Nohara
- 优先权: JP11-143392 19990524
- 主分类号: H01J1704
- IPC分类号: H01J1704
摘要:
A discharge tube is provided inside an outer tube. At least a pair of electrodes is arranged inside the discharge tube, and at least mercury is sealed into the discharge tube. The electrode includes an electrode pin and a metal pipe that surrounds the electrode pin. Because a contact area of the electrode pin and the inner surface of the metal pipe is sufficiently maintained in a stable manner, a tip temperature of the electrode pin can be lowered sufficiently without a variation. As a result, it is possible to obtain a high pressure discharge lamp that has excellent lifetime characteristics and can considerably reduce the variation of the lifetime characteristics between lamps.