JPS54141646A - Copy image adjusting method - Google Patents
Copy image adjusting methodInfo
- Publication number
- JPS54141646A JPS54141646A JP5032478A JP5032478A JPS54141646A JP S54141646 A JPS54141646 A JP S54141646A JP 5032478 A JP5032478 A JP 5032478A JP 5032478 A JP5032478 A JP 5032478A JP S54141646 A JPS54141646 A JP S54141646A
- Authority
- JP
- Japan
- Prior art keywords
- bias voltage
- developer
- fatigue
- output
- vsd
- 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
Landscapes
- Developing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To prevent the production of defective images owing to developer characteristics, soiling of optical sytem, etc. by detecting image densities and correcting the signal corresponding to this detection output by detecting fluctuation components with time such as deveoper fatigue, decrease in intensity of illumination of optical system, etc.
CONSTITUTION: An arithmetic controller 10 operates the deveoping bias voltage VE from the output of a detector 7. This operation involves superimposing a bias voltage to a mean value Vsd of the surface potential of a photosensitive drum 3 to provide a developing bias voltage. This superimposed bias voltage is adjusted according to the output of a developer fatigue detector 8 by a bias adjuster 11. Hence, the developing bias voltage VE outputted from the arithmetic controller 10 becomes the one wherein the bias voltage Vaf increasing with an increase in the fatigue degree a of the developer is superimposed on the mean value Vsd and is expressed by VE=Vsd+Vaf, which is then applied to a developing electrode 5. Then, the ground soiling owing to the fatigue of the developer may be prevented.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5032478A JPS54141646A (en) | 1978-04-26 | 1978-04-26 | Copy image adjusting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5032478A JPS54141646A (en) | 1978-04-26 | 1978-04-26 | Copy image adjusting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54141646A true JPS54141646A (en) | 1979-11-05 |
Family
ID=12855716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5032478A Pending JPS54141646A (en) | 1978-04-26 | 1978-04-26 | Copy image adjusting method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54141646A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5688142A (en) * | 1979-12-20 | 1981-07-17 | Toshiba Corp | Image density control device |
JPS58172654A (en) * | 1982-04-02 | 1983-10-11 | Canon Inc | Control device of image recording |
-
1978
- 1978-04-26 JP JP5032478A patent/JPS54141646A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5688142A (en) * | 1979-12-20 | 1981-07-17 | Toshiba Corp | Image density control device |
JPS58172654A (en) * | 1982-04-02 | 1983-10-11 | Canon Inc | Control device of image recording |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5518667A (en) | Stabilization method of image density | |
JPS57200054A (en) | Picture forming device | |
JPS6326389B2 (en) | ||
JPS5486347A (en) | Development stabilizing system | |
JPS5515169A (en) | Recorder | |
JPS54141646A (en) | Copy image adjusting method | |
JPS5363020A (en) | Image control method | |
JPS5393835A (en) | Copy picture quality controller of electrostatic copying machine | |
JPS5776562A (en) | Electrophotographic cpier | |
JPS5740279A (en) | Image stabilization method | |
JPS57119379A (en) | Detector for copying area in copying machine | |
JPS5589859A (en) | Method and apparatus for forming stable image | |
JPS57164739A (en) | Copying apparatus | |
JPS5672467A (en) | Development bias control method | |
JPS55117163A (en) | Image forming device | |
JPS56161556A (en) | Method for controlling electrophotographic copying machine | |
JPH03166562A (en) | Image forming device | |
JPS56151946A (en) | Electrophotographic copier | |
JPS54130134A (en) | Developing bias control unit | |
JPS5776564A (en) | Control system of copy surface image | |
JPS5722269A (en) | Electrophotographic method | |
JPS55117165A (en) | Image forming device | |
JPS5678857A (en) | Toner density detecting device | |
JPS55155367A (en) | Image stabilization method | |
JPS54149646A (en) | Partially coloring zerography and apparatus therefor |