JP2015206947A5

JP2015206947A5 - Image forming apparatus

Info

Publication number: JP2015206947A5
Application number: JP2014088456A
Authority: JP
Filing date: 2014-04-22
Publication date: 2017-06-08
Anticipated expiration: 2034-04-22

Description

本発明は、色ずれ等を補正する補正手段を備えた画像形成装置に関する。 The present invention relates to images forming apparatus provided with a correction means for correcting a color shift and the like.

本発明は、装置の内部温度の変化に基づいて、正確な予測補正制御を実行することができる画像形成装置を提供することを目的とする。 The present invention is based on a change in the internal temperature of the device, and to provide an accurate prediction correction control the images forming apparatus that Ru can be executed.

上記目的を達成するために、本発明に係る画像形成装置は、感光体と、光源と、前記光源から照射された光を偏向する回転多面鏡と、前記回転多面鏡を回転する駆動部と、前記光源と前記回転多面鏡とを収容する筐体とを有し、前記回転多面鏡により偏向された光によって前記感光体を露光して前記感光体に静電潜像を形成する露光装置と、前記感光体上の前記静電潜像を現像して画像を形成する現像器と、前記筐体の内部に設けられ、前記露光装置の温度を検知する温度検知手段と、前記回転多面鏡が回転を停止した状態での第１タイミングにおいて前記温度検知手段に第１温度を検知させ、前記第１タイミングより後の前記回転多面鏡が回転を開始する前の第２タイミングにおいて前記温度検知手段に第２温度を検知させ、前記第１温度と前記第２温度とに基づいて色ずれ量を決定する決定手段と、前記露光装置が画像データに基づいて前記感光体を露光するために前記回転多面鏡が回転を開始した後の露光タイミングを、前記決定手段により決定された前記色ずれ量に基づいて補正する補正手段と、を有することを特徴とする。
In order to achieve the above object, an image forming apparatus according to the present invention includes a photoconductor, a light source, a rotating polygon mirror that deflects light emitted from the light source, and a driving unit that rotates the rotating polygon mirror . An exposure apparatus that has a housing that houses the light source and the rotating polygon mirror, and that exposes the photosensitive member with light deflected by the rotating polygon mirror to form an electrostatic latent image on the photosensitive member ; A developing unit that develops the electrostatic latent image on the photosensitive member to form an image, a temperature detection unit that is provided inside the housing and detects the temperature of the exposure apparatus, and the rotary polygon mirror rotates. The first temperature is detected by the temperature detection means at a first timing in a state where the rotation is stopped, and the temperature detection means is changed to a second timing before the rotation polygon mirror starts to rotate after the first timing. 2 temperature is detected, the first temperature Determining means for determining the amount of color misregistration on the basis of the second temperature, the exposure timing after said rotating polygon mirror for the exposure apparatus exposing the photoreceptor based on image data starts to rotate, and having a correction means for correcting, based on the color shift amount determined by the determining means.

Claims

A photoreceptor,
A rotary polygon mirror that deflects light emitted from the light source; a drive unit that rotates the rotary polygon mirror; and a housing that houses the light source and the rotary polygon mirror. An exposure device that exposes the photoconductor with light deflected by a mirror to form an electrostatic latent image on the photoconductor;
A developing device for developing the electrostatic latent image on the photoreceptor to form an image;
A temperature detecting means provided inside the housing for detecting the temperature of the exposure apparatus ;
At a second timing before the rotation polygon mirror starts to rotate after the first timing, the temperature detection means detects the first temperature at a first timing with the rotation polygon mirror stopped rotating. Determining means for causing the temperature detecting means to detect a second temperature and determining a color misregistration amount based on the first temperature and the second temperature ;
Correction means for correcting the exposure timing after the rotary polygon mirror starts rotating so that the exposure apparatus exposes the photoconductor based on image data based on the color misregistration amount determined by the determination means. image forming apparatus characterized by having, when.

The image forming apparatus further includes a control unit that executes a warm-up process ,
The control means executes the warm-up process after the image forming apparatus is powered on;
The said determination means makes the said temperature detection means detect the said 1st temperature in the 1st timing in the state which the said rotation polygon mirror stopped rotating after the said warm-up process was performed. the image forming apparatus according to 1.

It said determining means, when the change amount per predetermined time of the temperature detected by said temperature detecting means is equal to or less than the threshold value, characterized in that to detect the first temperature to the temperature sensing means The image forming apparatus according to claim 1 .

The determination unit updates the first temperature based on a detection result of the temperature detection unit after the image formation based on the image data is completed and the rotary polygon mirror stops rotating. The image forming apparatus according to claim 1.

It said temperature sensing means, an image forming apparatus according to any one of claims 1 to 4, characterized in that provided in the driver circuit board of the rotary polygon mirror.

It said temperature sensing means, an image forming apparatus according to any one of claims 1 to 4, characterized in that air flow generated by rotation of the rotary polygon mirror is provided at a position such as to lower the detected temperature.