发明申请
- 专利标题: IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD OF EFFECTIVELY DETECTING A SPEED DEVIATION PATTERN OF THE IMAGE FORMING APPARATUS
- 专利标题(中): 图像形成装置和图像形成方法有效检测图像形成装置的速度偏移图案
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申请号: US11677013申请日: 2007-02-20
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公开(公告)号: US20070196132A1公开(公告)日: 2007-08-23
- 发明人: Kazuhiko Kobayashi , Joh Ebara , Yasuhisa Ehara , Kouji Amanai , Seiichi Handa , Yuji Matsuda , Toshiyuki Uchida , Noriaki Funamoto , Keisuke Sugiyama
- 申请人: Kazuhiko Kobayashi , Joh Ebara , Yasuhisa Ehara , Kouji Amanai , Seiichi Handa , Yuji Matsuda , Toshiyuki Uchida , Noriaki Funamoto , Keisuke Sugiyama
- 优先权: JP2006-040415 20060217
- 主分类号: G03G15/00
- IPC分类号: G03G15/00
摘要:
An image forming apparatus includes a plurality of image bearing members, each of which is configured to bear a portion of a pattern image including a plurality of reference images in a given form, an endless moving member facing the plurality of image bearing members and configured to receive the pattern image, an image detecting unit configured to detect the plurality of reference images, a rotational angle detecting unit configured to separately detect each image bearing member at a given rotational angle, and a controller configured to detect a speed deviation pattern for each revolution of each image bearing member. The controller is configured to detect the speed deviation pattern based on a result obtained from a phase component and a quadrature component of a frequency signal generated from the detection result obtained by the rotational angle detecting unit and a result of detecting the plurality of reference images in the pattern image transferred onto the endless moving member.