JPS57200054A - Picture forming device - Google Patents

Picture forming device

Info

Publication number
JPS57200054A
JPS57200054A JP56085386A JP8538681A JPS57200054A JP S57200054 A JPS57200054 A JP S57200054A JP 56085386 A JP56085386 A JP 56085386A JP 8538681 A JP8538681 A JP 8538681A JP S57200054 A JPS57200054 A JP S57200054A
Authority
JP
Japan
Prior art keywords
potential
reference light
picture
light pattern
inputted
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.)
Granted
Application number
JP56085386A
Other languages
Japanese (ja)
Other versions
JPH0314187B2 (en
Inventor
Takahiro Inoue
Yutaka Komiya
Takao Aoki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP56085386A priority Critical patent/JPS57200054A/en
Publication of JPS57200054A publication Critical patent/JPS57200054A/en
Publication of JPH0314187B2 publication Critical patent/JPH0314187B2/ja
Granted legal-status Critical Current

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
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5033—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor
    • G03G15/5037—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the photoconductor characteristics, e.g. temperature, or the characteristics of an image on the photoconductor the characteristics being an electrical parameter, e.g. voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Dry Development In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To stabilize the level of picture density by forming the electrostatic latent images of reference light patterns on a picture forming body, detecting the potential thereof, comparing the same with reference potential, calibrating and controlling a latent image forming process and further detecting the picture density of the final copy by the reference light pattern and comparing the same with a reference value. CONSTITUTION:A latent image forming process by a reference light pattern is executed upon a photoreceptor 1 by outputting signals at preset integrated copying times. The potential of the bright and dark parts of latent images is detected with a sensor 12, and is inputted to an operational amplifier 14 via an amplifier 13, where it is compared with reference potential. In accordance with the result thereof, the high vaoltage power sources 15, 16 of electrostatic chargers 4, 5 are corrected and controlled. Thereafter, the reference light pattern is again obtained as the final copy by the copying process and the picture density thereof is detected with a sensor 19 and is inputted to an arithmetic control circuit 20, where it is compared with the reference value, and the control for the developer concn. is calibrated to an adequate level.
JP56085386A 1981-06-03 1981-06-03 Picture forming device Granted JPS57200054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56085386A JPS57200054A (en) 1981-06-03 1981-06-03 Picture forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56085386A JPS57200054A (en) 1981-06-03 1981-06-03 Picture forming device

Publications (2)

Publication Number Publication Date
JPS57200054A true JPS57200054A (en) 1982-12-08
JPH0314187B2 JPH0314187B2 (en) 1991-02-26

Family

ID=13857299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56085386A Granted JPS57200054A (en) 1981-06-03 1981-06-03 Picture forming device

Country Status (1)

Country Link
JP (1) JPS57200054A (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59157659A (en) * 1983-02-28 1984-09-07 Canon Inc Image density adjusting device
JPS6049351A (en) * 1983-08-27 1985-03-18 Mita Ind Co Ltd Image output device
JPS60131576A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Image adjusting method
JPS6111762A (en) * 1984-06-26 1986-01-20 Konishiroku Photo Ind Co Ltd Device for controlling image
US4587536A (en) * 1983-09-05 1986-05-06 Canon Kabushiki Kaisha Image recording apparatus with color detection
JPS61121065A (en) * 1984-11-16 1986-06-09 Mita Ind Co Ltd Method for discriminating abnormal state of copying machine
JPS6223075A (en) * 1985-07-24 1987-01-31 Hitachi Ltd Recorder
JPS6244755A (en) * 1985-08-22 1987-02-26 Fuji Xerox Co Ltd Calibrating device for photosensitive body surface electrometer of electrostatic recording device
JPS63142370A (en) * 1986-12-05 1988-06-14 Ricoh Co Ltd Controller for photosensitive body potential
JPS63142369A (en) * 1986-12-05 1988-06-14 Ricoh Co Ltd Controller for photosensitive body potential
JPS63246770A (en) * 1987-04-01 1988-10-13 Fuji Xerox Co Ltd Toner supplying device
JPH02162365A (en) * 1988-12-16 1990-06-21 Ricoh Co Ltd Electrophotographic copying device
JPH02176678A (en) * 1988-09-09 1990-07-09 Ricoh Co Ltd Picture density control method
JPH02308268A (en) * 1989-05-24 1990-12-21 Ricoh Co Ltd Electrophotographic copying device

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59157659A (en) * 1983-02-28 1984-09-07 Canon Inc Image density adjusting device
JPS6049351A (en) * 1983-08-27 1985-03-18 Mita Ind Co Ltd Image output device
US4587536A (en) * 1983-09-05 1986-05-06 Canon Kabushiki Kaisha Image recording apparatus with color detection
JPS60131576A (en) * 1983-12-20 1985-07-13 Konishiroku Photo Ind Co Ltd Image adjusting method
JPS6111762A (en) * 1984-06-26 1986-01-20 Konishiroku Photo Ind Co Ltd Device for controlling image
JPS61121065A (en) * 1984-11-16 1986-06-09 Mita Ind Co Ltd Method for discriminating abnormal state of copying machine
JPS6223075A (en) * 1985-07-24 1987-01-31 Hitachi Ltd Recorder
JPS6244755A (en) * 1985-08-22 1987-02-26 Fuji Xerox Co Ltd Calibrating device for photosensitive body surface electrometer of electrostatic recording device
JPS63142370A (en) * 1986-12-05 1988-06-14 Ricoh Co Ltd Controller for photosensitive body potential
JPS63142369A (en) * 1986-12-05 1988-06-14 Ricoh Co Ltd Controller for photosensitive body potential
JPS63246770A (en) * 1987-04-01 1988-10-13 Fuji Xerox Co Ltd Toner supplying device
JPH02176678A (en) * 1988-09-09 1990-07-09 Ricoh Co Ltd Picture density control method
JPH02162365A (en) * 1988-12-16 1990-06-21 Ricoh Co Ltd Electrophotographic copying device
JPH02308268A (en) * 1989-05-24 1990-12-21 Ricoh Co Ltd Electrophotographic copying device

Also Published As

Publication number Publication date
JPH0314187B2 (en) 1991-02-26

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