发明申请
- 专利标题: IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
- 专利标题(中): 图像形成装置和图像密度控制方法
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申请号: US12367736申请日: 2009-02-09
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公开(公告)号: US20090202263A1公开(公告)日: 2009-08-13
- 发明人: Akira YOSHIDA , Shin Hasegawa , Hitoshi Ishibashi , Yoshiaki Miyashita , Kohta Fujimori , Nobutaka Takeuchi , Kayoko Tanaka , Yushi Hirayama , Tetsuya Muto
- 申请人: Akira YOSHIDA , Shin Hasegawa , Hitoshi Ishibashi , Yoshiaki Miyashita , Kohta Fujimori , Nobutaka Takeuchi , Kayoko Tanaka , Yushi Hirayama , Tetsuya Muto
- 优先权: JP2008-028139 20080207; JP2008-060009 20080310
- 主分类号: G03G15/00
- IPC分类号: G03G15/00 ; G03G15/06
摘要:
An image forming apparatus includes a control device that calculates a developing ability of the developing device based on a detection value detected by an optical detection device from the plural toner patches. The control device adjusts an image formation condition based on the calculated developing ability. A factor detection device is provided to detect a contributing factor that causes the developing ability to largely change after the last adjustment of the image formation condition. The control device controls image formation such that when the factor detection device does not detect the contribution factor and a developing ability calculated this time is different from that calculated last time (as to a part of the plural toner patches), the plural toner patches are formed based on a prescribed fixed image formation condition so that an attraction amount of toner attracting to the plural toner patches enter a prescribed range detectable for the optical detection device. The remaining toner patches are formed (based on an image formation condition determined) in accordance with the image formation condition previously adjusted. When the detection device detects the contribution factor, the entire toner patches are formed based on the prescribed fixed condition.
公开/授权文献
- US08045874B2 Image forming apparatus and image density control method 公开/授权日:2011-10-25