JPH0442661U - - Google Patents
Info
- Publication number
- JPH0442661U JPH0442661U JP8381590U JP8381590U JPH0442661U JP H0442661 U JPH0442661 U JP H0442661U JP 8381590 U JP8381590 U JP 8381590U JP 8381590 U JP8381590 U JP 8381590U JP H0442661 U JPH0442661 U JP H0442661U
- Authority
- JP
- Japan
- Prior art keywords
- photoconductor
- conductive substrate
- detects
- bias power
- detection circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 8
- 108091008695 photoreceptors Proteins 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 5
- 238000010586 diagram Methods 0.000 description 7
Description
第１図はこの考案のコロナ放電装置を使用する
電子写真装置の概略構造を示す図、第２図はコロ
ナ放電器の説明図、第３図はこの考案によるコロ
ナ放電装置の１実施例を示す回路図、第４図は検
出信号のパルス幅変調を説明するための波形図、
第５図はコロナ放電電流とデユーテイとの関係を
示す線図、第６図、第７図は第３図のコロナ放電
装置で使用する高圧電源の実施例を示す回路図、
第８図、第９図は制御部の動作を説明するための
フローチヤートである。
１１……感光体、３０……電流検出回路、３６
……バイアス電源、ＲＳ２，ＳＷ２，ＲＳ１……
分圧手段。
Fig. 1 is a diagram showing the schematic structure of an electrophotographic apparatus using the corona discharge device of this invention, Fig. 2 is an explanatory diagram of the corona discharge device, and Fig. 3 is a diagram showing one embodiment of the corona discharge device of this invention. A circuit diagram, FIG. 4 is a waveform diagram for explaining pulse width modulation of the detection signal,
FIG. 5 is a diagram showing the relationship between corona discharge current and duty; FIGS. 6 and 7 are circuit diagrams showing an example of the high-voltage power supply used in the corona discharge device of FIG. 3;
FIGS. 8 and 9 are flowcharts for explaining the operation of the control section. 11...Photoreceptor, 30...Current detection circuit, 36
...Bias power supply, RS2, SW2, RS1...
Partial pressure means.
Claims (1)
イアス電源と、感光体の導電性基板と接地間に接
続した感光体帯電電流を検出する電流検出回路と
を有し、検出回路に分圧手段を設け、分圧手段で
検出した検出信号に応じてバイアス電源の出力を
制御するようにしたことを特徴とするコロナ放電
装置。 ２ 感光体の表面電位を検出する表面電位計と、
感光体の導電性基板に基準電位を供給するバイア
ス電源と、感光体の導電性基板と接地間に接続し
た感光体帯電電流を検出する電流検出回路と、検
出回路の検出信号に応じてコロナ放電器に供給す
る高電圧を制御する制御部とを有し、検出回路の
検出値が所定値になるようにバイアス電源の出力
を調整する手段を設けたことを特徴とするコロナ
放電装置。[Scope of Claim for Utility Model Registration] 1. Comprising a bias power supply that supplies a reference voltage to the conductive substrate of the photoconductor, and a current detection circuit that detects the photoconductor charging current connected between the conductive substrate of the photoconductor and ground. A corona discharge device characterized in that the detection circuit is provided with voltage dividing means, and the output of the bias power supply is controlled in accordance with the detection signal detected by the voltage dividing means. 2. A surface electrometer that detects the surface potential of the photoreceptor;
A bias power supply that supplies a reference potential to the conductive substrate of the photoconductor, a current detection circuit that detects the photoconductor charging current connected between the conductive substrate of the photoconductor and ground, and a corona discharge circuit that detects the charging current of the photoconductor connected between the conductive substrate of the photoconductor and ground. What is claimed is: 1. A corona discharge device comprising: a control section for controlling a high voltage supplied to an electric appliance; and means for adjusting an output of a bias power source so that a detection value of a detection circuit becomes a predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381590U JPH0442661U (en) | 1990-08-07 | 1990-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381590U JPH0442661U (en) | 1990-08-07 | 1990-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0442661U true JPH0442661U (en) | 1992-04-10 |
Family
ID=31631804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8381590U Pending JPH0442661U (en) | 1990-08-07 | 1990-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442661U (en) |
-
1990
- 1990-08-07 JP JP8381590U patent/JPH0442661U/ja active Pending
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