JP2017219832A5 - - Google Patents
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- JP2017219832A5 JP2017219832A5 JP2017091436A JP2017091436A JP2017219832A5 JP 2017219832 A5 JP2017219832 A5 JP 2017219832A5 JP 2017091436 A JP2017091436 A JP 2017091436A JP 2017091436 A JP2017091436 A JP 2017091436A JP 2017219832 A5 JP2017219832 A5 JP 2017219832A5
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- discharge
- charging member
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- image
- bias voltage
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- 238000005259 measurement Methods 0.000 claims description 20
- 239000000969 carrier Substances 0.000 claims description 18
- 230000003334 potential Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000005755 formation reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 2
- 239000000463 material Substances 0.000 claims 1
Description
上記目的を達成する為の本発明の構成は、潜像を担持する回転可能な像担持体と、前記像担持体を露光する露光手段と、前記像担持体を帯電する帯電部材と、前記帯電部材にバイアス電圧を印加するバイアス印加手段と、前記帯電部材と前記像担持体との間で放電す
る電流量を検知する放電量検知手段と、前記放電量検知手段によって検知される放電電流量から前記帯電部材に印加するバイアス電圧を決定する放電電流制御手段と、前記帯電部材と前記像担持体との間の放電に関する情報である放電情報を検出する放電情報検出手段とを有し、前記放電情報検出手段は、前記像担持体の面内の印字可能な領域の一部に回転方向に対し垂直な方向の幅が前記印字可能な領域の幅よりも小さい領域を部分測定領域と設定し、前記帯電部材により前記像担持体を一定の電位に帯電した後に前記露光手段によって前記部分測定領域と前記部分測定領域を除く領域とで互いに異なる電位を形成している時に前記部分測定領域と前記帯電部材との間の放電に関する部分放電情報を検出し、前記放電電流制御手段は、該部分放電情報に基づいて前記帯電部材に印加される画像形成におけるバイアス電圧を補正することを特徴とする。
The structure of the present invention for achieving the above-mentioned object includes a rotatable image carrier that carries a latent image, an exposure unit that exposes the image carrier, a charging member that charges the image carrier, and the charging unit. Bias applying means for applying a bias voltage to the member, discharge amount detecting means for detecting the amount of current discharged between the charging member and the image carrier, and discharge current amount detected by the discharge amount detecting means A discharge current control unit that determines a bias voltage applied to the charging member; and a discharge information detection unit that detects discharge information that is information related to discharge between the charging member and the image carrier. The information detection means sets, as a partial measurement area, a region in which the width in the direction perpendicular to the rotation direction is smaller than the width of the printable region in a part of the printable region in the surface of the image carrier, When the image-bearing member is charged to a constant potential by the charging member, and then the exposure unit forms different potentials in the partial measurement region and the region excluding the partial measurement region, the partial measurement region and the charging It is characterized in that partial discharge information regarding discharge between the member and the member is detected, and the discharge current control unit corrects a bias voltage applied to the charging member in image formation based on the partial discharge information.
Claims (11)
前記像担持体を露光する露光手段と、
前記像担持体を帯電する帯電部材と、
前記帯電部材にバイアス電圧を印加するバイアス印加手段と、
前記帯電部材と前記像担持体との間で放電する電流量を検知する放電量検知手段と、前記放電量検知手段によって検知される放電電流量から前記帯電部材に印加するバイアス電圧を決定する放電電流制御手段と、
前記帯電部材と前記像担持体との間の放電に関する情報である放電情報を検出する放電情報検出手段とを有し、
前記放電情報検出手段は、前記像担持体の面内の印字可能な領域の一部に回転方向に対し垂直な方向の幅が前記印字可能な領域の幅よりも小さい領域を部分測定領域と設定し、前記帯電部材により前記像担持体を一定の電位に帯電した後に前記露光手段によって前記部分測定領域と前記部分測定領域を除く領域とで互いに異なる電位を形成している時に前記部分測定領域と前記帯電部材との間の放電に関する部分放電情報を検出し、
前記放電電流制御手段は、該部分放電情報に基づいて前記帯電部材に印加される画像形成におけるバイアス電圧を補正することを特徴とする画像形成装置。 A rotatable image carrier that carries a latent image,
Exposure means for exposing the image carrier,
A charging member for charging the image carrier,
Bias applying means for applying a bias voltage to the charging member,
Discharge amount detecting means for detecting the amount of current discharged between the charging member and the image carrier, and discharge for determining the bias voltage applied to the charging member from the amount of discharge current detected by the discharge amount detecting means. Current control means,
And a discharge information detecting means for detecting information relating to the discharge is a discharge information between said image bearing member and said charging member,
The discharge information detecting means sets, as a partial measurement area, an area in which a width in a direction perpendicular to a rotation direction is smaller than a width of the printable area in a part of the printable area on the surface of the image carrier. Then, after the image carrier is charged to a constant potential by the charging member and the partial measurement region and the region excluding the partial measurement region are formed with different potentials by the exposure unit, the partial measurement region Detects partial discharge information regarding discharge between the charging member,
The image forming apparatus, wherein the discharge current control unit corrects a bias voltage applied to the charging member in image formation based on the partial discharge information.
放電情報を検出することを特徴とする請求項１ないし３のいずれか１項に記載の画像形成装置。 By setting the partial measurement area as a non-exposed portion that is not exposed by the exposure means, and the area other than the partial measurement area as an exposed portion that is exposed by the exposure means , the partial measurement area and the partial measurement area are formed. The image forming apparatus according to any one of claims 1 to 3, wherein the partial discharge information is detected by setting different potentials in the excluded region.
前記像担持体を露光する露光手段と、
前記像担持体を帯電する帯電部材と、
前記帯電部材にバイアス電圧を印加するバイアス印加手段と、
前記帯電部材と前記像担持体との間で放電する電流量を検知する放電量検知手段と、
前記放電量検知手段で得られる放電電流量から前記帯電部材に印加するバイアス電圧を決定する放電電流制御手段と、
を有している画像形成装置における画像形成方法であって、
前記像担持体の面内の印字可能な領域の一部に回転方向に対し垂直な方向の幅が前記印字可能な領域よりも小さく設定された部分測定領域に対して、前記帯電部材により前記像担持体を一定の電位に帯電する工程と、
前記露光手段により前記部分測定領域と前記部分測定領域を除く領域とを互いに異なる電位とする工程と、
前記部分測定領域と前記帯電部材との間の放電に関する部分放電情報を検出する工程と、
前記部分放電情報に基づいて前記帯電部材に印加される画像形成におけるバイアス電圧を補正する工程を有することを特徴とする画像形成方法。
A rotatable image carrier that carries a latent image ,
Exposure means for exposing the image carrier ,
A charging member for charging the image carrier ,
Bias applying means for applying a bias voltage to the charging member ,
A discharge amount detection means for detecting the amount of current discharged between the image bearing member and said charging member,
Discharge current control means for determining a bias voltage applied to the charging member from the discharge current amount obtained by the discharge amount detection means ,
An image forming method in an image forming apparatus having:
With respect to a partial measurement area in which a width in a direction perpendicular to a rotation direction is set to be smaller than a printable area in a part of the printable area on the surface of the image carrier, the image is charged by the charging member. A step of charging the carrier to a constant potential,
A step of setting the partial measurement area and the area excluding the partial measurement area to different potentials by the exposing means,
Detecting partial discharge information regarding discharge between the partial measurement region and the charging member,
An image forming method comprising: a step of correcting a bias voltage applied to the charging member in image formation based on the partial discharge information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/605,190 US10146150B2 (en) | 2016-06-01 | 2017-05-25 | Process cartridge, image forming apparatus, image forming method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016110417 | 2016-06-01 | ||
| JP2016110417 | 2016-06-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2017219832A JP2017219832A (en) | 2017-12-14 |
| JP2017219832A5 true JP2017219832A5 (en) | 2020-06-18 |
| JP6921611B2 JP6921611B2 (en) | 2021-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017091436A Active JP6921611B2 (en) | 2016-06-01 | 2017-05-01 | Process cartridge, image forming device, image forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6921611B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7124380B2 (en) | 2018-03-29 | 2022-08-24 | ブラザー工業株式会社 | image forming device |
| KR20200109996A (en) | 2019-03-15 | 2020-09-23 | 휴렛-팩커드 디벨롭먼트 컴퍼니, 엘.피. | Detecting occurrence of background in non-image area |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004301908A (en) * | 2003-03-28 | 2004-10-28 | Canon Inc | Image forming apparatus |
| JP4994650B2 (en) * | 2005-12-02 | 2012-08-08 | キヤノン株式会社 | Charging device |
| JP4926571B2 (en) * | 2006-06-30 | 2012-05-09 | キヤノン株式会社 | Image forming apparatus |
| US8483585B2 (en) * | 2008-09-29 | 2013-07-09 | Lexmark International, Inc. | System and method for adjusting voltage bias of a charge roller of an image forming device based on environmental conditions to control white vector |
| JP2012133052A (en) * | 2010-12-20 | 2012-07-12 | Canon Inc | Image forming apparatus |
| JP2012163864A (en) * | 2011-02-08 | 2012-08-30 | Canon Inc | Image forming apparatus |
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- 2017-05-01 JP JP2017091436A patent/JP6921611B2/en active Active
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