发明授权
- 专利标题： Potential measuring device and image forming apparatus using the same
- 专利标题（中）： 电位测量装置及使用其的成像装置
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申请号： US11430992申请日： 2006-05-10
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公开(公告)号： US07548066B2公开(公告)日： 2009-06-16
- 发明人: Yoshikatsu Ichimura , Takashi Ushijima , Atsushi Kandori , Yoshitaka Zaitsu
- 申请人： Yoshikatsu Ichimura , Takashi Ushijima , Atsushi Kandori , Yoshitaka Zaitsu
- 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： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2005-142011 20050516
- 主分类号： G01R29/12
- IPC分类号： G01R29/12 ; G03G15/00 ; G03G15/06
摘要：
A potential measuring device for measuring a potential of a measurement object, includes a detection electrode that faces the measurement object, a reference electrode disposed in a vicinity of the detection electrode that is electrostatically shielded by an electrostatic shield structure with respect to the measurement object, and capacitance modulator for modulating an electrostatic coupled capacitance between the detection electrode and the measurement object to measure a potential of the measurement object by using an electric signal generated on the detection electrode and an electric signal generated on the reference electrode.