公开(公告)号：US20180275598A1

公开(公告)日：2018-09-27

申请号：US15904268

申请日：2018-02-23

申请人： KONICA MINOLTA, INC.

发明人： Hideo MAE ,  Tatsutoshi YAMADA ,  Atsushi KAWAI ,  Hideaki KOMIYAMA

IPC分类号： G03G15/00 ,  G03G9/08

CPC分类号： G03G21/0088 ,  G03G9/0825 ,  G03G15/0275 ,  G03G15/50

摘要： An image forming apparatus includes: a photosensitive member; a charger that charges a surface of the photosensitive member; an exposure device that forms a latent image; and a developing device that applies toner to the latent image, wherein the photosensitive member is incorporated in a detachable photosensitive member unit, and the developing device is incorporated in a detachable developing unit, the image forming apparatus including: an optimization controller that performs optimization of a charging bias of the charger and a developing bias of the developing device; and a replacement determiner that determines which of the photosensitive member unit and the developing unit is to be replaced when an optimized developing bias is out of a predetermined allowable range, wherein the replacement determiner determines that the developing unit is to be replaced, and determines that the photosensitive member unit is to be replaced.

公开(公告)号：US20180275582A1

公开(公告)日：2018-09-27

申请号：US15920588

申请日：2018-03-14

申请人： KONICA MINOLTA, INC.

发明人： Hideaki KOMIYAMA ,  Atsushi KAWAI ,  Tatsutoshi YAMADA ,  Hideo MAE

IPC分类号： G03G15/00

CPC分类号： G03G15/553 ,  G03G15/5054 ,  G03G15/75

摘要： An image forming apparatus includes: a rotatable photosensitive member included in a photosensitive unit that is attachable and detachable; an exposing device that forms a latent image on a surface of the photosensitive member; a developing device that forms a toner image by providing toner onto the latent image by using two-component developer; an image stabilization control part that performs optimization of a parameter value of image formation while image formation is not performed; and a replacement determiner that makes determination of replacement of the photosensitive unit on a basis of an optimized value that is the parameter value optimized by the image stabilization control part, wherein the replacement determiner determines that the photosensitive unit should be replaced in a case where the optimized value corresponds to a photosensitive member replacement event that has been determined in advance.