JPH0442659U - - Google Patents
Info
- Publication number
- JPH0442659U JPH0442659U JP8381390U JP8381390U JPH0442659U JP H0442659 U JPH0442659 U JP H0442659U JP 8381390 U JP8381390 U JP 8381390U JP 8381390 U JP8381390 U JP 8381390U JP H0442659 U JPH0442659 U JP H0442659U
- Authority
- JP
- Japan
- Prior art keywords
- detection signal
- rectifier circuit
- corona discharge
- current
- control means
- 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 11
- 108091008695 photoreceptors Proteins 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 9
- 102000012677 DET1 Human genes 0.000 description 1
- 101150113651 DET1 gene Proteins 0.000 description 1
- 101150066284 DET2 gene Proteins 0.000 description 1
Landscapes
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
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図は整
流回路のオフセツトの補正を説明するための線図
、第５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６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７図、第８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。
３０……電流検出部、ＤＥＴ１，ＤＥＴ２，Ｄ
ＥＴ３，３１……検出回路、３２，３３，３４，
３５……制御手段。
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. The circuit diagram, Fig. 4 is a diagram to explain offset correction of the rectifier circuit, Fig. 5 is a waveform diagram to explain pulse width modulation of the detection signal, and Fig. 6 is a diagram showing the relationship between corona discharge current and duty. Diagrams showing the relationship, Figures 7 and 8 are circuit diagrams showing an example of the high-voltage power supply used in the corona discharge device in Figure 3, and Figure 9 is a flowchart for explaining the operation of the control section. be. 30...Current detection section, DET1, DET2, D
ET3, 31...detection circuit, 32, 33, 34,
35...control means.
Claims (1)
と、電流検出部で電圧に変換した検出信号の正極
性成分を検出する整流回路と、負極性成分を検出
する整流回路と、交流成分を検出する整流回路と
を有する検出回路と、各整流回路に設けたダイオ
ードの順方向電圧降下に相当する感光体帯電電流
を検出信号に加算し、この加算された検出信号を
目標値に対して制御する制御手段とを備えたこと
を特徴とするコロナ放電装置。 ２ 制御手段はＣＰＵを備えプログラムに従つて
所定の加算データを検出信号に加算し、感光体帯
電電流に対応するコロナ放電電流を検出信号のデ
ユーテイに応じてパルス幅変調する請求項１に記
載のコロナ放電装置。[Scope of Claim for Utility Model Registration] 1. A current detection section that converts the photoconductor charging current into voltage, a rectifier circuit that detects the positive polarity component of the detection signal converted into voltage by the current detection section, and a rectification circuit that detects the negative polarity component. A detection circuit including a rectifier circuit and a rectifier circuit that detects an alternating current component, and a photoreceptor charging current corresponding to the forward voltage drop of a diode provided in each rectifier circuit is added to the detection signal, and the added detection signal is A corona discharge device characterized by comprising: a control means for controlling the temperature to a target value. 2. The control means according to claim 1, wherein the control means includes a CPU and adds predetermined addition data to the detection signal according to a program, and modulates the corona discharge current corresponding to the photoreceptor charging current in pulse width according to the duty of the detection signal. Corona discharge device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381390U JPH0442659U (en) | 1990-08-07 | 1990-08-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8381390U JPH0442659U (en) | 1990-08-07 | 1990-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0442659U true JPH0442659U (en) | 1992-04-10 |
Family
ID=31631800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8381390U Pending JPH0442659U (en) | 1990-08-07 | 1990-08-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0442659U (en) |
-
1990
- 1990-08-07 JP JP8381390U patent/JPH0442659U/ja active Pending
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