发明申请
- 专利标题： IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD
- 专利标题（中）： 图像形成装置和图像形成方法
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申请号： US12358311申请日： 2009-01-23
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公开(公告)号： US20090202260A1公开(公告)日： 2009-08-13
- 发明人: Shuhichi Morikuni , Shoji Tomita
- 申请人： Shuhichi Morikuni , Shoji Tomita
- 优先权： JP2008-027683 20080207
- 主分类号： G03G15/08
- IPC分类号： G03G15/08 ; G03G15/00
摘要：
Provided is an image forming apparatus including a charging device for charging a photoreceptor drum, a developing device for developing an electrostatic latent image formed on the photoreceptor drum, a developing bias applying device for applying a developing bias voltage to the developing device, a toner image density sensor for detecting an image density of a toner image formed on the photoreceptor drum, and a control portion for controlling an output value of the developing bias applying device, in which the control portion adjusts the developing bias voltage based on an average print coverage of document in previous printing jobs.