发明授权
- 专利标题: Electrophotographic apparatus having a fringe development preventing mechanism
- 专利标题(中): 具有边缘显影防止机构的电子照相设备
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申请号: US09833811申请日: 2001-04-13
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公开(公告)号: US06556229B2公开(公告)日: 2003-04-29
- 发明人: Teruaki Mitsuya , Nobuyoshi Hoshi , Hisao Okada , Yoshihiko Sano , Shinichi Akatsu , Shinya Kobayashi
- 申请人: Teruaki Mitsuya , Nobuyoshi Hoshi , Hisao Okada , Yoshihiko Sano , Shinichi Akatsu , Shinya Kobayashi
- 优先权: JP2000-113166 20000414
- 主分类号: G03G1501
- IPC分类号: G03G1501
摘要:
In an electrophotographic apparatus, regions having at least three different potential levels Vc, Vw, and Vr are formed on a photosensitive member by using an exposing device, and developing processes respectively using colored particles of different kinds are performed by normal development and reversal development on two potential levels Vc and Vr excluding the intermediate potential level Vw. The apparatus has an auxiliary exposing unit for forming a fringe development preventing potential in an edge of an image forming region in order to prevent fringe development from occurring. The auxiliary exposing unit sets an auxiliary exposure amount by performing pulse-width modulation on a laser driver.
公开/授权文献
- US20010030680A1 Electrophotographic apparatus 公开/授权日:2001-10-18