发明名称 |
HIGH-PRESSURE DISCHARGE LAMP LIGHT SOURCE DEVICE AND PROJECTOR. |
摘要 |
To stabilize the arc bright point position of a discharge lamp and suppress deformation of an electrode when an ultrahigh-pressure discharge lamp is operated with extremely low electric power, the lamp is operated by supplying power from a power supply device having a step-down chopper circuit and a full bridge circuit, a rectangular wave alternating current being supplied when it is operated with rated power or dimmed power (about 60 to 80% of rated power), a DC current being supplied during standby power operation of at most 0.5×P (W) with respect to the maximum operating power P (W). Moreover, the high-pressure discharge lamp light source device may be mounted on a projector for projecting images and the mode being changed to standby power operation when there is no change in an image signal, for example, for a prescribed period of time. |
申请公布号 |
NL2003873(A) |
申请公布日期 |
2010.05.28 |
申请号 |
NL20092003873 |
申请日期 |
2009.11.26 |
申请人 |
USHIO DENKI KABUSHIKI KAISHA, |
发明人 |
KAGATA, TEPPEI;OKAMOTO, TETSU;HIRAO, TETSUJI |
分类号 |
H01J61/12;H01J61/84;H05B41/24 |
主分类号 |
H01J61/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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