发明授权
- 专利标题: High pressure discharge lamp lighting apparatus
- 专利标题(中): 高压放电灯照明装置
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申请号: US11167116申请日: 2005-06-28
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公开(公告)号: US07253568B2公开(公告)日: 2007-08-07
- 发明人: Katumi Sugaya , Tsuyoshi Sugihara , Yoshikazu Suzuki
- 申请人: Katumi Sugaya , Tsuyoshi Sugihara , Yoshikazu Suzuki
- 申请人地址: JP Tokyo
- 专利权人: Ushio Denki Kabushiki Kaisha
- 当前专利权人: Ushio Denki Kabushiki Kaisha
- 当前专利权人地址: JP Tokyo
- 代理机构: Rader, Fishman & Grauer PLLC
- 优先权: JP2004-189784 20040628; JP2004-204506 20040712
- 主分类号: H01B37/02
- IPC分类号: H01B37/02 ; H01J17/20
摘要:
It is an object of the present invention to provide a high pressure discharge lamp lighting apparatus, has a structure to control decrease of illuminance on a screen which is thought to be a cause of wear of an anode in an early stage of the life span. The high pressure discharge lamp lighting apparatus has a high pressure discharge lamp in which a pair of electrodes is arranged so as to face each other at an interval of 2 mm or less in an arc tube which is made of quartz glass, and mercury of 0.16 mg/mm3 or more, rare gas, and halogen of 1×10−6 to 1×10−2 μmol/mm3 is enclosed, and a power supply apparatus supplying direct current to the discharge lamp, wherein the power supply apparatus superimposes an alternating component on the direct current and impress the superimposed current to the discharge lamp.
公开/授权文献
- US20050285535A1 High pressure discharge lamp lighting apparatus 公开/授权日:2005-12-29
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