JP2016099541A5

JP2016099541A5 - Image forming apparatus and control method

Info

Publication number: JP2016099541A5
Application number: JP2014237384A
Authority: JP
Filing date: 2014-11-25
Publication date: 2018-01-11
Anticipated expiration: 2034-11-25

Claims

A photosensitive member carrying a toner image, an exposure device for forming an electrostatic latent image on the photosensitive member, and supplying toner to the electrostatic latent image formed by the exposure device to develop the electrostatic latent image An image forming unit having a developing roller for transferring, and a transfer unit for transferring a toner image carried on the photosensitive member to a recording sheet;
A control unit for controlling the rotation speed of the developing roller,
The controller is
Developing bias setting processing for setting a developing bias value corresponding to the maximum rotation speed of the developing roller;
From the maximum rotation speed of the developing roller for correcting the developing bias value set in the developing bias setting process and keeping the density of the toner image constant corresponding to the corrected developing bias value. Deceleration amount determination processing for determining the deceleration amount;
Run
Wherein said corrected deceleration amount determining process and the value of the developing bias, determined the deceleration amount and the image forming apparatus for forming a toner image on the thus recording sheet to the image forming unit used.

The image forming apparatus according to claim 1,
The controller is
An image quality apparatus that performs correction to increase an absolute value of a developing bias in the deceleration amount determination process.

The image forming apparatus according to claim 2,
The controller is
An image forming apparatus that corrects the developing bias to an upper limit value in absolute value in the deceleration amount determination process.

The image forming apparatus according to any one of claims 1 to 3 , wherein
The controller is
In the developing bias setting process, the number of recording sheets on which a toner image is formed by the image forming unit is counted, and a developing bias corresponding to the maximum rotation speed of the developing roller according to the counted number of recording sheets. Forming apparatus for setting the value of .

The image forming apparatus according to any one of claims 1 to 3 , wherein
It has a humidity detector that detects the humidity inside the device.
The controller is
An image forming apparatus that sets a value of a developing bias corresponding to a maximum rotation speed of the developing roller according to the humidity detected by the humidity detecting unit in the developing bias setting process .

The image forming apparatus according to any one of claims 1 to 5, wherein:
A density sensor for detecting the density of the formed toner image;
The controller is
A result of forming a detection toner image by the image forming unit using the developing bias value corrected in the deceleration amount determination process and the determined deceleration amount, and detecting the detection toner image by the density sensor To change the deceleration amount of the developing roller.

A developing bias value and a developing roller rotation speed for forming a toner image in an image forming unit that forms an electrostatic latent image on a photosensitive member and supplies toner to the electrostatic latent image by a developing roller for development. A control method for determining
A developing bias setting step for setting a developing bias value corresponding to the maximum rotation speed of the developing roller;
From the maximum rotation speed of the developing roller for correcting the value of the developing bias set in the developing bias setting step and keeping the density of the toner image constant corresponding to the corrected value of the developing bias A deceleration amount determining step for determining a deceleration amount;
A control method comprising: a value of the developing bias corrected in the deceleration amount determining step; and an image forming step of forming a toner image using the determined deceleration amount.