发明名称 |
Discharge lamp lighting device, control method thereof, and projector |
摘要 |
A discharge lamp lighting device includes: a power control circuit outputting DC current; an AC conversion circuit being supplied with the DC current and generating and outputting discharge-lamp driving AC current by inverting the polarity of the DC current at a predetermined time; and a control unit performing a duty ratio control process of controlling a duty ratio on the basis of a polarity inversion time of the discharge-lamp driving AC current on the AC conversion circuit and performing an interval current control process of controlling a current value of the DC current every polarity inversion time interval on the power control circuit. Here, the control unit performs the interval current control process so as to control a difference between an average value and a maximum value of the DC current of each polarity inversion time interval on the basis of a difference between the duty ratio and a predetermined reference duty ratio. |
申请公布号 |
US8138684(B2) |
申请公布日期 |
2012.03.20 |
申请号 |
US20090401926 |
申请日期 |
2009.03.11 |
申请人 |
TANAKA KAZUHIRO;YAMAUCHI KENTARO;TERASHIMA TETSUO;TAKEZAWA TAKESHI;SEIKO EPSON CORPORATION |
发明人 |
TANAKA KAZUHIRO;YAMAUCHI KENTARO;TERASHIMA TETSUO;TAKEZAWA TAKESHI |
分类号 |
H05B41/36 |
主分类号 |
H05B41/36 |
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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