JPS5723972A - Control method for development bias - Google Patents
Control method for development biasInfo
- Publication number
- JPS5723972A JPS5723972A JP9949980A JP9949980A JPS5723972A JP S5723972 A JPS5723972 A JP S5723972A JP 9949980 A JP9949980 A JP 9949980A JP 9949980 A JP9949980 A JP 9949980A JP S5723972 A JPS5723972 A JP S5723972A
- Authority
- JP
- Japan
- Prior art keywords
- background
- exposure
- amount
- potential
- photoreceptor
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/065—Arrangements for controlling the potential of the developing electrode
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE:To obtain copies without background, by grasping the characteristics of a photoreceptor from the amount of exposure by a reference pattern and a crrepage potential, and controlling the development bias voltage according to the light amount of background and creepage potential at original copying. CONSTITUTION:The amount of exposure of a reference pattern formed with specified dark and light regions 2A, 2B and the creepage potential of a photo sensing drum formed with this exposure are detected with sensors 17, 19 and a development bias operation controller 18 can operate and grasp the characteristic of a photoreceptor 10. Then, the amount of exposure and creepage potential of the background of an original 3 are detected with the sensors 17, 19 and applied to the device 18 to control the bias voltage of a developper 13. With this constitution, the copying without background and dirt can be made independently of time eging characteristic variance of the photoreceptor, and types of originals with different reflection factors of background.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9949980A JPS5723972A (en) | 1980-07-21 | 1980-07-21 | Control method for development bias |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9949980A JPS5723972A (en) | 1980-07-21 | 1980-07-21 | Control method for development bias |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5723972A true JPS5723972A (en) | 1982-02-08 |
Family
ID=14248970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9949980A Pending JPS5723972A (en) | 1980-07-21 | 1980-07-21 | Control method for development bias |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5723972A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01501257A (en) * | 1986-11-06 | 1989-04-27 | イーストマン・コダック・カンパニー | Dynamic feedforward process control for electronic copiers |
JPH02119257U (en) * | 1988-11-30 | 1990-09-26 | ||
JPH02259674A (en) * | 1989-03-31 | 1990-10-22 | Ricoh Co Ltd | Original density detector |
JPH03171068A (en) * | 1989-11-30 | 1991-07-24 | Mita Ind Co Ltd | Image forming device |
US5107302A (en) * | 1988-10-28 | 1992-04-21 | Ricoh Company, Ltd. | Image density control device for an image forming apparatus |
CN109861193A (en) * | 2018-12-29 | 2019-06-07 | 樊嵩 | A kind of earth leakage protecting method and its system of electric cabinet |
-
1980
- 1980-07-21 JP JP9949980A patent/JPS5723972A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01501257A (en) * | 1986-11-06 | 1989-04-27 | イーストマン・コダック・カンパニー | Dynamic feedforward process control for electronic copiers |
US5107302A (en) * | 1988-10-28 | 1992-04-21 | Ricoh Company, Ltd. | Image density control device for an image forming apparatus |
JPH02119257U (en) * | 1988-11-30 | 1990-09-26 | ||
JPH02259674A (en) * | 1989-03-31 | 1990-10-22 | Ricoh Co Ltd | Original density detector |
JPH03171068A (en) * | 1989-11-30 | 1991-07-24 | Mita Ind Co Ltd | Image forming device |
CN109861193A (en) * | 2018-12-29 | 2019-06-07 | 樊嵩 | A kind of earth leakage protecting method and its system of electric cabinet |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5497038A (en) | Image density controller for zerographic copier | |
US4533234A (en) | Automatic density control method for a photocopying machine | |
JPS5436725A (en) | Zerographic copying method | |
JPS5723972A (en) | Control method for development bias | |
JPS57200054A (en) | Picture forming device | |
GB2104673A (en) | Controlling light intensity | |
JPS5393835A (en) | Copy picture quality controller of electrostatic copying machine | |
JPS5462833A (en) | Controlling method of original exposure | |
JPS5499632A (en) | Image adjusting method of copying machines | |
JPS542134A (en) | Automatic exposure controlling electrophotographiccopier | |
JPS5776562A (en) | Electrophotographic cpier | |
JPS56113160A (en) | Electrophotographic method | |
JPS5349436A (en) | Picture density control method for electronic copier | |
JPS5741671A (en) | Copying device | |
JPS578553A (en) | Recording device | |
JPS5497034A (en) | Image quality controller for electrostatic copier | |
JPS5633661A (en) | Copying machine | |
JPS5794757A (en) | Copy density adjusting device | |
JPS57164739A (en) | Copying apparatus | |
JPS54103359A (en) | Toner density controller | |
JPH0440708B2 (en) | ||
JPS6473363A (en) | Exposure controller in image forming device | |
JPS5773763A (en) | Color picture forming device | |
JPS5799665A (en) | Controller for original image exposure of electronic copying machine | |
JPS54108639A (en) | Copying paper feed controller |