发明授权
- 专利标题： Image forming apparatus and power supply
- 专利标题（中）： 成像设备和电源
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申请号： US11333484申请日： 2006-01-17
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公开(公告)号： US07558501B2公开(公告)日： 2009-07-07
- 发明人: Tohru Saito , Masahiro Suzuki , Osamu Nagasaki , Koichi Suzuki
- 申请人： Tohru Saito , Masahiro Suzuki , Osamu Nagasaki , Koichi Suzuki
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Canon U.S.A., Inc. I.P. Division
- 优先权： JP2005-222761 20050801
- 主分类号： G03G15/00
- IPC分类号： G03G15/00 ; G03G15/16
摘要：
An image forming apparatus includes a high-voltage power supply having a piezoelectric transformer. The power supply includes a positive output voltage generation circuit and a negative output voltage generation circuit. Each of the positive output voltage generation circuit and the negative output voltage generation circuit includes a piezoelectric transformer, a piezoelectric transformer driving circuit, an output voltage detection circuit, and a drive control circuit for outputting a control signal for controlling the piezoelectric transformer driving circuit using a signal from the output voltage detection circuit and an output voltage setting signal for setting an output voltage. The positive output voltage generation circuit and the negative output voltage generation circuit are simultaneously turned on when the output polarity of the high-voltage power supply with a piezoelectric transformer is switched.
公开/授权文献
- US20070025753A1 Image forming apparatus and power supply 公开/授权日：2007-02-01
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