JPS5776563A - Image stabilizing control method - Google Patents

Image stabilizing control method

Info

Publication number
JPS5776563A
JPS5776563A JP55152028A JP15202880A JPS5776563A JP S5776563 A JPS5776563 A JP S5776563A JP 55152028 A JP55152028 A JP 55152028A JP 15202880 A JP15202880 A JP 15202880A JP S5776563 A JPS5776563 A JP S5776563A
Authority
JP
Japan
Prior art keywords
pattern
power supply
electric charge
output
black
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
Application number
JP55152028A
Other languages
Japanese (ja)
Inventor
Yasuo Sawada
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP55152028A priority Critical patent/JPS5776563A/en
Publication of JPS5776563A publication Critical patent/JPS5776563A/en
Pending 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)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To always obtain a stable image with high quality, by controlling both the electric charge amount and the exposure volume from the result obtained by comparing the surface potential of a photosensitive drum corresponding to the black and white parts of a reference pattern with the reference value. CONSTITUTION:A reference pattern 3 is formed with a black part 3a and a white pattern 3b, and the surface potential of a photosensitive drum corresponding to the pattern 3 is detected by a surface electrometer 17. In such constitution, the output of the electrometer 17 is supplied to a CPU19 via an A/D converter 18. The CPU19 compares the potentials of the black and white parts with the reference value respectively. Based on the result of this comparison, both the output of an electric charge power supply and the output which increases and decreases the lamp light volume by the unit value are stored. And an electric charge power supply 22 and a lamp power supply 24 are controlled in the next copy cycle and from the contents of the above-mentioned storage. As a result, the aging of a drum and the initial change after a pause of copy can be compensated to ensure a high-quality image at all times.
JP55152028A 1980-10-31 1980-10-31 Image stabilizing control method Pending JPS5776563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152028A JPS5776563A (en) 1980-10-31 1980-10-31 Image stabilizing control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152028A JPS5776563A (en) 1980-10-31 1980-10-31 Image stabilizing control method

Publications (1)

Publication Number Publication Date
JPS5776563A true JPS5776563A (en) 1982-05-13

Family

ID=15531474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152028A Pending JPS5776563A (en) 1980-10-31 1980-10-31 Image stabilizing control method

Country Status (1)

Country Link
JP (1) JPS5776563A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224355A (en) * 1982-06-24 1983-12-26 Ricoh Co Ltd Method for correcting surface potential of photoreceptor of electrophotographic copying machine
US4975747A (en) * 1988-11-04 1990-12-04 Ricoh Company, Ltd. Image density control by sensing reference density patterns at multiple points

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224355A (en) * 1982-06-24 1983-12-26 Ricoh Co Ltd Method for correcting surface potential of photoreceptor of electrophotographic copying machine
US4975747A (en) * 1988-11-04 1990-12-04 Ricoh Company, Ltd. Image density control by sensing reference density patterns at multiple points

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