发明公开
EP1035756A2 Method and system for driving high pressure mercury discharge lamp and image projector
审中-公开
Verfahren und Anordnung zum Steuern einer Hochdruckquecksilberentladungslampe und Bildprojektor
- 专利标题： Method and system for driving high pressure mercury discharge lamp and image projector
- 专利标题（中）： Verfahren und Anordnung zum Steuern einer Hochdruckquecksilberentladungslampe und Bildprojektor
-
申请号： EP00104635.8申请日： 2000-03-03
-
公开(公告)号： EP1035756A2公开(公告)日： 2000-09-13
- 发明人: Kai, Makoto , Horiuchi, Makoto , Takeda, Mamoru , Tsutsumi, Takeharu , Ogura, Toshiaki
- 申请人： Matsushita Electric Industrial Co., Ltd.
- 申请人地址： 1006-banchi, Oaza-Kadoma Kadoma-shi, Osaka-fu, 571-8501 JP
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： 1006-banchi, Oaza-Kadoma Kadoma-shi, Osaka-fu, 571-8501 JP
- 代理机构： Barnfather, Karl Jon, Dr.
- 优先权： JP5820099 19990305
- 主分类号： H05B41/292
- IPC分类号： H05B41/292
摘要：
An image projector has a lamp unit 23 having a high-pressure mercury vapor discharge lamp 21 and a parabolic mirror 22. To the high-pressure mercury vapor discharge lamp 21, a driving system 24 applies an alternating voltage such that wandering of a cathode luminescent spot generated in the vicinity of a tip of each of the discharge electrodes of the high-pressure mercury vapor discharge lamp 21 is suppressed, the frequency being within the range of 20- 42 kHz. This construction allows to prevent flicker in a projected image of a liquid crystal projector and the like, and therefore achieves high quality in the projected image.
公开/授权文献
信息查询
IPC分类:
