JP2013167656A5

JP2013167656A5 -

Info

Publication number: JP2013167656A5
Application number: JP2012029062A
Authority: JP
Filing date: 2012-02-14
Publication date: 2015-04-02
Anticipated expiration: 2032-02-14

Description

請求項２記載の発明は、濃度制御用画像形成手段は、予め定めた第１の濃度の電位制御用画像を前記被転写体上に形成させ、前記濃度センサは、前記被転写体上に転写された前記電位制御用画像及び階調制御用画像の濃度を検出し、前記濃度補正手段は、前記濃度センサにより読み取られた前記電位制御用画像の濃度が前記第１の濃度となるように、前記帯電手段、前記潜像形成手段、及び前記現像手段の少なくとも１つを制御することで前記露光電位と前記現像バイアス電位との差分電位を制御する電位制御手段と、前記濃度センサにより読み取られた前記電位制御用画像の濃度を前記第１の濃度とするための基準差分電位を設定する設定手段と、前記差分電位が前記基準差分電位となるように前記帯電手段、前記潜像形成手段、及び前記現像手段の少なくとも１つを制御して、予め定めた第２の濃度の前記階調制御用画像を前記被転写体上に形成させる階調制御用画像形成手段と、過去の予め定めた期間において形成した前記トナー像の画像密度に基づいて、前記基準差分電位を補正する補正関数を設定する補正関数設定手段と、前記補正関数と、前記濃度センサにより読み取った前記階調制御用画像の濃度と前記第２の濃度との差分濃度と、に基づいて、基準差分電位を補正するための補正量を設定する補正量設定手段と、を含む。 According to the second aspect of the invention, the density control image forming means forms a potential control image having a first density on the transfer target body, and the density sensor transfers the transfer target image onto the transfer target body. has been detected the concentration of the potential control image and gradation control image, said density correcting means, so that the concentration of the potential control image read by the density sensor becomes the first concentration, the band dente stage, the potential control means for controlling the difference potential of the exposure potential and the developing bias potential by controlling at least one of said latent image forming hand stage and said current Zote stage, the concentration wherein a setting means for setting a reference difference potential for the concentration of the potential control image and said first concentration, said band dente stage so that the difference voltage is the reference difference voltage read by the sensor, the latent image forming hand stage, and the And controlling at least one of Zote stage, the tone control image forming means for forming the tone control image of the second concentration of predetermined on the material to be transferred, a predetermined period in the past based on the image density of the toner image formed in the concentration of the correction function setting means for setting a correction function for correcting the reference difference voltage, wherein the correction function and the tone control image read by the density sensor And a correction amount setting means for setting a correction amount for correcting the reference differential potential based on the difference density between the second density and the second density.

Claims

An image carrier,
Charging means for charging the image carrier to a charging potential corresponding to the charging voltage by applying a charging voltage;
Latent image formation for forming an electrostatic latent image by exposing the image carrier charged by the charging means to a light beam corresponding to image data and controlling an exposure potential of an exposure area on the image carrier Means,
By applying a developing bias voltage, a developing member holding a developer containing toner is charged to a developing bias potential corresponding to the developing bias voltage, and the electrostatic latent image is developed by the developer to hold the image. Developing means for forming a toner image on the body;
Transfer means for transferring the toner image formed on the image carrier to a transfer target;
A density control image forming means for forming a density control image of a predetermined density on the transfer target;
A density sensor that detects the density of the density control image transferred onto the transfer target;
Based on the difference density between the density of the density control image read by the density sensor and the predetermined density, and the image density of the toner image formed in the past predetermined period, the density sensor Density correction means for correcting the density so that the density of the read density control image becomes the predetermined density;
An image forming apparatus.

The density control image forming means forms a potential control image having a predetermined first density on the transfer member,
The density sensor, the detected concentration of the potential control image and gradation control image transferred on the transfer object,
Said density correction means, as described above the concentration of the potential control image read by the density sensor becomes the first concentration, said band dente stage, the latent image formed hand stage and said current Zote stage A potential control means for controlling a difference potential between the exposure potential and the developing bias potential by controlling at least one of the first potential, and the density of the potential control image read by the density sensor as the first density. control and setting means for setting a reference difference voltage, wherein the band dente stage so that the difference voltage is the reference difference voltage, the latent image formed hand stage, and at least one of said current Zote stage for to the tone control image forming means for forming the tone control image of the second concentration of predetermined on the material to be transferred, the image density of the toner image formed in the past predetermined period Based on said criteria A correction function setting means for setting a correction function for correcting the minute potential, the correction function, the the difference concentration between the concentration and the second concentration of the gradation control image read by the density sensor, on the basis The image forming apparatus according to claim 1, further comprising: a correction amount setting unit that sets a correction amount for correcting the reference differential potential.

The image forming apparatus according to claim 2, wherein the transfer body is an intermediate transfer body, and at least one of the potential control image and the gradation control image is formed on the intermediate transfer body.

The image forming apparatus according to claim 2, wherein the transfer target is a recording sheet, and at least one of the potential control image and the gradation control image is formed on the recording sheet.

The image forming apparatus according to claim 1, wherein the density correction unit corrects the toner amount of the toner so that the density of the density control image read by the density sensor becomes the predetermined density. apparatus.

Computer
An image forming program for causing the image forming apparatus according to any one of claims 1 to 5 to function as the density control image forming unit and the density correcting unit.