JPH038351U - - Google Patents
Info
- Publication number
- JPH038351U JPH038351U JP6857389U JP6857389U JPH038351U JP H038351 U JPH038351 U JP H038351U JP 6857389 U JP6857389 U JP 6857389U JP 6857389 U JP6857389 U JP 6857389U JP H038351 U JPH038351 U JP H038351U
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- potential
- electrostatic latent
- latent image
- exposure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Description
第１図は本考案による感光体表面電位検出工程
のフローを示すフローチヤート、第２図は本考案
の装置の帯電チヤージヤの制御ブロツク図、第３
図は上記の表面電位検出工程に関係する事項のタ
イミングチヤート、第４図は本考案が適用される
画像形成装置の一実施例としてのフルカラー複写
機の全体概略構成を示す断面図、第５図はそのプ
リンタ部の制御ブロツク図、第６図は感光体の表
面電位の暗減衰とその特性の経時変化を説明する
曲線図、第７図は本考案の根拠となる経時変化に
よる暗減衰量の差を説明する曲線図、第８図は潜
像パターンの表面電位計測位置が現像位置の下流
側にある場合の現像位置での表面電位推定方法を
示す曲線図である。
１，２，３……画像形成装置、１２……レーザ
光出射装置（露光手段）１３……記録装置、１４
……感光体、１５……帯電手段、１６……現像手
段、１７……転写手段、Ｓ……電位検出手段。
FIG. 1 is a flowchart showing the process of detecting the surface potential of a photoreceptor according to the present invention, FIG. 2 is a control block diagram of the charging charger of the apparatus according to the present invention, and FIG.
The figure is a timing chart of matters related to the above-mentioned surface potential detection process, FIG. 4 is a cross-sectional view showing the overall schematic configuration of a full-color copying machine as an example of an image forming apparatus to which the present invention is applied, and FIG. 6 is a control block diagram of the printer section, FIG. 6 is a curve diagram explaining the dark decay of the surface potential of the photoreceptor and its characteristics over time, and FIG. FIG. 8 is a curve diagram illustrating the difference and shows a method for estimating the surface potential at the development position when the surface potential measurement position of the latent image pattern is downstream of the development position. 1, 2, 3... Image forming device, 12... Laser light emitting device (exposure means) 13... Recording device, 14
...photoreceptor, 15...charging means, 16...developing means, 17...transfer means, S...potential detection means.
Claims (1)
の移送方向の順に帯電手段、露光手段、現像手段
、転写手段が設けられ、上記帯電手段により一様
帯電された感光体を露光手段により画像露光を行
なつて感光体上に静電潜像を形成し、これを現像
手段により現像してトナー像とし、転写手段によ
り転写紙に転写し定着して画像を形成する画像形
成装置であつて、一定光強度のパターンを上記露
光手段により感光体上に露光して静電潜像パター
ンを感光体上に形成し、その表面電位を露光位置
と現像位置との中間に設けた電位検出手段により
検知し、検知された静電潜像パターンの電位に基
づいて各種作像条件を調整して画像濃度の補正を
行なう画像形成装置において、 感光体上に形成された上記静電潜像パターンが
上記電位検出手段による検出位置に来た時、感光
体を、該感光体が上記電位検出位置から現像位置
迄の間移動するに要する時間に相当する時間停止
させ、上記電位検出手段によりその間の静電潜像
パターンの表面電位の減衰を測定し、測定された
電位減衰により、上記静電潜像パターンの検出電
位を補正することを特徴とする画像形成装置。[Claims for Utility Model Registration] Charging means, exposure means, developing means, and transfer means are provided along the periphery of a photoreceptor that is transported in a certain direction in the order of the transport direction, and the photoreceptor is uniformly charged by the charging means. An electrostatic latent image is formed on the photoreceptor by imagewise exposure of the photoreceptor by an exposure means, and this is developed by a developing means to form a toner image, which is transferred and fixed onto a transfer paper by a transfer means to form an image. An image forming apparatus for forming an electrostatic latent image pattern on the photoreceptor by exposing the photoreceptor to a pattern with a constant light intensity using the exposure means, and adjusting the surface potential of the electrostatic latent image pattern between the exposure position and the development position. In an image forming apparatus that corrects image density by adjusting various image forming conditions based on the detected potential of an electrostatic latent image pattern by a potential detecting means provided on a photoreceptor, When the electrostatic latent image pattern comes to the detection position by the potential detection means, the photoconductor is stopped for a time corresponding to the time required for the photoconductor to move from the potential detection position to the development position, and the potential is An image forming apparatus characterized in that a detection means measures the attenuation of the surface potential of the electrostatic latent image pattern between them, and corrects the detected potential of the electrostatic latent image pattern based on the measured potential attenuation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6857389U JPH038351U (en) | 1989-06-14 | 1989-06-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6857389U JPH038351U (en) | 1989-06-14 | 1989-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH038351U true JPH038351U (en) | 1991-01-25 |
Family
ID=31603126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6857389U Pending JPH038351U (en) | 1989-06-14 | 1989-06-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH038351U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61281258A (en) * | 1985-06-07 | 1986-12-11 | Canon Inc | Electronic photograph picture forming device |
| JPH0277766A (en) * | 1988-09-14 | 1990-03-16 | Canon Inc | image forming device |
| JPH0281063A (en) * | 1988-09-19 | 1990-03-22 | Canon Inc | Electrophotographic device |
-
1989
- 1989-06-14 JP JP6857389U patent/JPH038351U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61281258A (en) * | 1985-06-07 | 1986-12-11 | Canon Inc | Electronic photograph picture forming device |
| JPH0277766A (en) * | 1988-09-14 | 1990-03-16 | Canon Inc | image forming device |
| JPH0281063A (en) * | 1988-09-19 | 1990-03-22 | Canon Inc | Electrophotographic device |
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