JPH0416454U - - Google Patents
Info
- Publication number
- JPH0416454U JPH0416454U JP5677090U JP5677090U JPH0416454U JP H0416454 U JPH0416454 U JP H0416454U JP 5677090 U JP5677090 U JP 5677090U JP 5677090 U JP5677090 U JP 5677090U JP H0416454 U JPH0416454 U JP H0416454U
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- forming apparatus
- image forming
- life
- electrostatic latent
- 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 11
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
Description
第１図及び第２図はこの考案の基本構成を示す
機能ブロツク図、第３図はこの考案の一実施例で
あるレーザプリンタ内の感光体ドラム周辺を制御
系と共に示す概略構成図、第４図は感光体使用時
間とその感光体表面の帯電電位ＶＤ，露光電位Ｖ
Ｌ及び残留電位ＶＲとの関係を示す線図、第５図
は感光体表面の露光電位ＶＬとトナー濃度検知バ
イアスＶＢ′との差電圧ＶＬ−ＶＢ′とトナー濃
度ＴＣとの関係を示す線図、第６図は第３図のＣ
ＰＵによる感光体寿命判定処理を示すフロー図、
第７図はその処理時に作成される特定の露光パタ
ーンを示す説明図、第８図は感光体ドラムの表面
電位と電位計の出力電位との関係を示す線図、第
９図はこの発明の他の実施例による感光体寿命判
定処理を示すフロー図である。
１……感光体ドラム、２……帯電チヤージヤ、
３……露光装置、５……現像ユニツト、６……転
写チヤージヤ、７……分離チヤージヤ、１０……
電位計、１１……マイクロプロセツサ、１２……
光学センサ。
1 and 2 are functional block diagrams showing the basic configuration of this invention, FIG. 3 is a schematic configuration diagram showing the area around the photosensitive drum in a laser printer which is an embodiment of this invention together with a control system, and FIG. The figure shows the usage time of the photoconductor, the charging potential VD of the photoconductor surface, and the exposure potential V
A diagram showing the relationship between L and residual potential VR, and FIG. 5 is a diagram showing the relationship between the differential voltage VL-VB' between the exposure potential VL on the surface of the photoreceptor and the toner concentration detection bias VB' and the toner concentration TC. , Figure 6 shows C in Figure 3.
A flow diagram showing photoconductor lifespan determination processing by PU,
FIG. 7 is an explanatory diagram showing a specific exposure pattern created during the processing, FIG. 8 is a diagram showing the relationship between the surface potential of the photoreceptor drum and the output potential of the electrometer, and FIG. 9 is an explanatory diagram showing the specific exposure pattern created during the processing. FIG. 7 is a flowchart showing photoconductor lifespan determination processing according to another embodiment. 1...Photosensitive drum, 2...Electrostatic charger,
3...Exposure device, 5...Developing unit, 6...Transfer charger, 7...Separation charger, 10...
Electrometer, 11...Microprocessor, 12...
optical sensor.
Claims (1)
像を形成し、その静電潜像を現像してトナー像と
して用紙に転写するようにした電子写真方式の画
像形成装置において、 前記感光体上の露光部分の電位を検出する露光
電位検出手段と、該手段の検出結果に基づいて前
記感光体の寿命を判定する感光体寿命判定手段と
、該手段によつて前記感光体が寿命になつたと判
定された時に、その旨の情報を表示する表示手段
とを備えたことを特徴とする電子写真方式の画像
形成装置。 ２ 均一に帯電された感光体上を露光して静電潜
像を形成し、その静電潜像を現像してトナー像と
して用紙に転写するようにした電子写真方式の画
像形成装置において、 転写処理後の前記感光体上の残留電位を検出す
る残留電位検出手段と、該手段の検出結果に基づ
いて前記感光体の寿命を判定する感光体寿命判定
手段と、該手段によつて前記感光体が寿命になつ
たと判定された時に、その旨の情報を表示する表
示手段とを備えたことを特徴とする電子写真方式
の画像形成装置。[Claims for Utility Model Registration] 1. Electrophotography in which a uniformly charged photoreceptor is exposed to light to form an electrostatic latent image, and the electrostatic latent image is developed and transferred to paper as a toner image. In this type of image forming apparatus, an exposure potential detection means for detecting the potential of an exposed portion on the photoreceptor, a photoreceptor life determination means for determining the lifespan of the photoreceptor based on the detection result of the means, and the means An electrophotographic image forming apparatus comprising: display means for displaying information to that effect when it is determined that the photoreceptor has reached the end of its life. 2. In an electrophotographic image forming apparatus that exposes a uniformly charged photoreceptor to form an electrostatic latent image, develops the electrostatic latent image, and transfers it to paper as a toner image. residual potential detection means for detecting the residual potential on the photoreceptor after processing; photoreceptor life determination means for determining the lifespan of the photoreceptor based on the detection result of the means; 1. An electrophotographic image forming apparatus comprising: display means for displaying information when it is determined that the life of the image forming apparatus has reached the end of its life.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5677090U JPH0416454U (en) | 1990-05-30 | 1990-05-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5677090U JPH0416454U (en) | 1990-05-30 | 1990-05-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0416454U true JPH0416454U (en) | 1992-02-10 |
Family
ID=31580894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5677090U Pending JPH0416454U (en) | 1990-05-30 | 1990-05-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0416454U (en) |
-
1990
- 1990-05-30 JP JP5677090U patent/JPH0416454U/ja active Pending
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