JPH0255251U - - Google Patents
Info
- Publication number
- JPH0255251U JPH0255251U JP13477688U JP13477688U JPH0255251U JP H0255251 U JPH0255251 U JP H0255251U JP 13477688 U JP13477688 U JP 13477688U JP 13477688 U JP13477688 U JP 13477688U JP H0255251 U JPH0255251 U JP H0255251U
- Authority
- JP
- Japan
- Prior art keywords
- illumination lamp
- developing
- document
- image
- developing device
- 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
- 238000005286 illumination Methods 0.000 claims description 5
- 238000005421 electrostatic potential Methods 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- 108091008695 photoreceptors Proteins 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Developing For Electrophotography (AREA)
Description
第１図は本考案の電子写真装置としての複写機
の断面図、第２図は本考案に係る制御回路、第３
図は第２図の制御回路の要部の波形に関連した図
、第４図は交流電源電圧の周波数と時間の関係を
示す図、第５図は生成された画像の濃度ムラを模
式的に示す図である。
２１……照明ランプ、３１……感光体ドラム（
感光体）、３４……現像装置、３４ａ……現像ロ
ーラ、４４……遅延回路、４６……現像バイアス
駆動回路、４８……交流電源、４９……主制御回
路、Ａ……照明走査方向、Ｇ……原稿。
FIG. 1 is a sectional view of a copying machine as an electrophotographic apparatus of the present invention, FIG. 2 is a control circuit according to the present invention, and FIG.
The figure is a diagram related to the waveform of the main part of the control circuit in Figure 2, Figure 4 is a diagram showing the relationship between the frequency and time of the AC power supply voltage, and Figure 5 is a diagram schematically showing the density unevenness of the generated image. FIG. 21...Illumination lamp, 31...Photosensitive drum (
photoconductor), 34...Developing device, 34a...Developing roller, 44...Delay circuit, 46...Developing bias drive circuit, 48...AC power supply, 49...Main control circuit, A...Illumination scanning direction, G...Manuscript.
Claims (1)
対的に照明走査し、帯電装置により均一帯電され
た感光体に原稿像に対応した光を照射して静電潜
像を形成し、現像装置によりトナーを施して顕像
化するようにした電子写真装置において、 上記照明走査方向における照明ランプの周期的
な光量変化に対応して現像装置の現像バイアス値
を変化させるようにしたことを特徴とする電子写
真装置。[Claim for Utility Model Registration] An illumination lamp connected to an AC power supply and a document are scanned relative to each other, and a photoreceptor uniformly charged by a charging device is irradiated with light corresponding to the document image to generate electrostatic potential. In an electrophotographic apparatus in which an image is formed and visualized by applying toner by a developing device, a developing bias value of the developing device is changed in response to periodic changes in light amount of an illumination lamp in the illumination scanning direction. An electrophotographic device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13477688U JPH0255251U (en) | 1988-10-14 | 1988-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13477688U JPH0255251U (en) | 1988-10-14 | 1988-10-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0255251U true JPH0255251U (en) | 1990-04-20 |
Family
ID=31393833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13477688U Pending JPH0255251U (en) | 1988-10-14 | 1988-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0255251U (en) |
-
1988
- 1988-10-14 JP JP13477688U patent/JPH0255251U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4039257A (en) | Pretransfer corotron switching | |
| US4496644A (en) | Electric field adjustment for magnetic brushes | |
| JP3149176B2 (en) | Pre-transfer charging device for image forming apparatus | |
| JP3376199B2 (en) | Image forming device | |
| JP2952009B2 (en) | Image forming device | |
| JPH0258243U (en) | ||
| JPH0312671A (en) | Electrophotographic copying device | |
| JPH0345237Y2 (en) | ||
| JPS574064A (en) | Electrophotographing method | |
| JPH05307304A (en) | Image quality stabilizing device for electrophotographic device | |
| JPS6360160U (en) | ||
| JP2526127Y2 (en) | Image quality control device in electrophotographic apparatus | |
| JPS60241068A (en) | Electrophotographic device | |
| JPS5714856A (en) | Electrostatic printer | |
| JPH05307303A (en) | Image stabilization device for electrophotographic device | |
| JPH0293663A (en) | image forming device | |
| JPH0580639A (en) | Corona discharge device | |
| JPS6150967U (en) | ||
| JPH0262574U (en) | ||
| JPS6376869U (en) | ||
| JPH02134550U (en) | ||
| JPS6291650U (en) | ||
| JPS6314272U (en) | ||
| JPS62154454U (en) | ||
| JPS59136756A (en) | Electrophotographic copying device |