公开(公告)号：US5450180A

公开(公告)日：1995-09-12

申请号：US240212

申请日：1994-05-09

申请人： Yukihiro Ohzeki ,  Koichi Hiroshima ,  Junji Araya ,  Yasushi Sato ,  Toshio Miyamoto ,  Kimio Nakahata

发明人： Yukihiro Ohzeki ,  Koichi Hiroshima ,  Junji Araya ,  Yasushi Sato ,  Toshio Miyamoto ,  Kimio Nakahata

IPC分类号： G03G15/16

CPC分类号： G03G15/1675

摘要： An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a charging member disposed opposed to the image bearing member; and bias application device for applying a bias voltage to the charging member, wherein the bias applying device effects a constant voltage control to the charging member when an image area of the image bearing member is in a charging region of the charging member, and effects a constant current control during at least a part of a period in which an area of the image bearing member other than the image area is in the charging region, and wherein a level of a constant voltage of the constant voltage control is determined during the constant current control.

摘要翻译： 图像形成装置包括可动图像承载部件; 图像形成装置，用于在图像承载部件上形成图像; 与图像承载部件相对设置的充电部件; 以及偏压施加装置，用于对充电部件施加偏置电压，其中当图像承载部件的图像区域处于充电部件的充电区域时，偏置施加装置对充电部件施加恒定的电压控制， 在图像区域以外的图像承载部件的区域处于充电区域的期间的至少一部分期间的恒定电流控制，并且在恒定电流期间确定恒定电压控制的恒定电压的电平 控制。