Image formation device and image formation program
AssigneeOki Data Corporation
InventorMikio Motomura
Life of this patent
Estimating the term…
Abstract
An image formation device for forming an image by an electrophotographic process includes a charge voltage controller configured to control an application charge voltage to be applied to a charge member, a transfer voltage controller configured to control a transfer voltage to be applied to a transfer member, a charge current detector configured to detect a charge current flowing through the charge member, and a controller configured to determine the application charge voltage according to the application charge voltage and the detected charge current, both detected when the transfer voltage controller applies a predetermined transfer voltage.
Claims12
An image formation device for forming an image by an electrophotographic process forming a latent image on a surface of a photoreceptor charged by a charge member, attaching a developer to the latent image on the surface of the photoreceptor to form a developer image, and then transferring the developer image from the photoreceptor to a medium, the image formation device comprising:
- a charge voltage controller configured to control an application charge voltage to be applied to the charge member;
- a transfer voltage controller configured to control a transfer voltage to be applied to a transfer member;
- a charge current detector configured to detect a charge current flowing through the charge member;
- and
- a controller configured to determine the application charge voltage according to the application charge voltage and the detected charge current both detected when the transfer voltage controller applies a predetermined transfer voltage,
- wherein the controller is configured to:
- estimate a first charge starting voltage comprising an application charge voltage at which a charge current flowing through the charge member is lowered to zero with the transfer voltage being a first transfer voltage,
- estimate a second charge starting voltage comprising an application charge voltage at which a charge current flowing through the charge member is lowered to zero with the transfer voltage being a second transfer voltage, and
- determine an application charge voltage to be applied to the charge member by adding up the first charge starting voltage, a target charge potential of the photoreceptor, and a difference between the first and second charge starting voltages.
An image formation program causing a computer of an image formation device to form an image by an electrophotographic process, the image formation device including a photoreceptor, a charge member, an exposure unit, a development unit, a transfer member, a charge voltage controller configured to control an application charge voltage to be applied to the charge member, a transfer voltage controller configured to control a transfer voltage to be applied to the transfer member, and a charge current detector configured to detect a charge current flowing through the charge member, the program causing the computer to execute:
- a first charge starting voltage estimation step of estimating a first charge starting voltage as an application charge voltage at which a charge current flowing through the charge member is lowered to zero in a case where the transfer voltage is a first voltage;
- a second charge starting voltage estimation step of estimating a second charge starting voltage as an application charge voltage at which a charge current flowing through the charge member is lowered to zero in a case where the transfer voltage is a second voltage;
- and
- an application charge voltage determination step of determining an application charge voltage to be applied to the charge member by adding up the first charge starting voltage, a target charge potential of the photoreceptor, and a difference between the first and second charge starting voltages.
An image formation device for forming an image by an electrophotographic process forming a latent image on a surface of a photoreceptor charged by a charge member, attaching a developer to the latent image on the surface of the photoreceptor to form the developer image, and then transferring the developer image from the photoreceptor to a medium, the image formation device comprising:
- a charge voltage controller configured to control an application charge voltage to be applied to the charge member;
- a transfer voltage controller configured to control a transfer voltage to be applied to a transfer member;
- a charge current detector configured to detect a charge current flowing through the charge member;
- and
- a controller configured to determine the application charge voltage according to the application charge voltage and the detected charge current both detected when the transfer voltage controller applies a predetermined transfer voltage,
- wherein the controller is configured to determine the application charge voltage according to two or more DC voltages of different values applied to the charge member and according to two or more DC voltages of different values applied to the transfer member.
Dependencies are inferred from the claim text.