发明申请
- 专利标题： Image forming apparatus
- 专利标题（中）： 图像形成装置
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申请号： US11727931申请日： 2007-03-29
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公开(公告)号： US20070189785A1公开(公告)日： 2007-08-16
- 发明人: Katsuya Nagamochi , Yoshikatsu Kamisuwa
- 申请人： Katsuya Nagamochi , Yoshikatsu Kamisuwa
- 专利权人： KABUSHIKI KAISHA TOSHIBA,TOSHIBA TEC KABUSHIKI KAISHA
- 当前专利权人： KABUSHIKI KAISHA TOSHIBA,TOSHIBA TEC KABUSHIKI KAISHA
- 主分类号： G03G15/00
- IPC分类号： G03G15/00
摘要：
The residual potential and charging potential of the surface of a photosensitive drum 20, or the charging potential and exposure potential of the surface of the photosensitive drum 20 are detected by an exposure sensor 28. The lifetime of the photosensitive drum 20 is judged in accordance with the difference between the detected charging potential and residual potential, or the difference between the detected charging potential and exposure potential.