DE2901891C3 - Verfahren zur Einstellung der Bildschwärzung der Kopien bei einem Kopiergerät - Google Patents

Verfahren zur Einstellung der Bildschwärzung der Kopien bei einem Kopiergerät

Info

Publication number
DE2901891C3
DE2901891C3 DE2901891A DE2901891A DE2901891C3 DE 2901891 C3 DE2901891 C3 DE 2901891C3 DE 2901891 A DE2901891 A DE 2901891A DE 2901891 A DE2901891 A DE 2901891A DE 2901891 C3 DE2901891 C3 DE 2901891C3
Authority
DE
Germany
Prior art keywords
exposure
image density
photoconductor
normal
image
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.)
Expired
Application number
DE2901891A
Other languages
German (de)
English (en)
Other versions
DE2901891A1 (de
DE2901891B2 (de
Inventor
Hitoshi Kawasaki Nakamura
Nachio Sagamihara Seko
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
Publication of DE2901891A1 publication Critical patent/DE2901891A1/de
Publication of DE2901891B2 publication Critical patent/DE2901891B2/de
Application granted granted Critical
Publication of DE2901891C3 publication Critical patent/DE2901891C3/de
Expired 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
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure
    • 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)
  • Control Or Security For Electrophotography (AREA)
DE2901891A 1978-01-18 1979-01-18 Verfahren zur Einstellung der Bildschwärzung der Kopien bei einem Kopiergerät Expired DE2901891C3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP408478A JPS5497432A (en) 1978-01-18 1978-01-18 Image density control method

Publications (3)

Publication Number Publication Date
DE2901891A1 DE2901891A1 (de) 1979-07-19
DE2901891B2 DE2901891B2 (de) 1981-04-30
DE2901891C3 true DE2901891C3 (de) 1981-12-24

Family

ID=11574908

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2901891A Expired DE2901891C3 (de) 1978-01-18 1979-01-18 Verfahren zur Einstellung der Bildschwärzung der Kopien bei einem Kopiergerät

Country Status (4)

Country Link
US (1) US4256401A (enExample)
JP (1) JPS5497432A (enExample)
DE (1) DE2901891C3 (enExample)
GB (1) GB2013109B (enExample)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4474453A (en) * 1979-04-18 1984-10-02 Ricoh Company, Ltd. Electrostatic copying apparatus
JPS6051105B2 (ja) * 1979-12-24 1985-11-12 株式会社東芝 自動画質制御複写機
JPS56133746A (en) * 1980-03-25 1981-10-20 Canon Inc Image reproducing method
US4350435A (en) * 1980-04-04 1982-09-21 Eastman Kodak Company Copy contrast and density control
US4341461A (en) * 1980-04-07 1982-07-27 Xerox Corporation Development control of a reproduction machine
DE3128801A1 (de) * 1980-07-22 1982-04-15 Canon K.K., Tokyo "bilderzeugungsgeraet"
JPS5726962A (en) * 1980-07-25 1982-02-13 Matsushita Electric Ind Co Ltd Photoradiation method for recorder
US4432634A (en) * 1980-10-20 1984-02-21 Minolta Camera Kabushiki Kaisha Electrophotographic copying apparatus
JPS5838969A (ja) * 1981-09-02 1983-03-07 Konishiroku Photo Ind Co Ltd 電子写真複写機
US4534642A (en) * 1981-12-25 1985-08-13 Tokyo Shibaura Denki Kabushiki Kaisha Electrophotographic copying apparatus for effecting a copying operation on the basis of a set copying characteristic
NL8200825A (nl) * 1982-03-02 1983-10-03 Oce Nederland Bv Elektrofotografisch kopieerapparaat.
JPS59232366A (ja) * 1983-06-15 1984-12-27 Canon Inc 電子写真複写方法
US4491408A (en) * 1984-01-03 1985-01-01 Xerox Corporation Electrostatographic system development modulation
US4814834A (en) * 1984-04-03 1989-03-21 Canon Kabushiki Kaisha Electrophotographic apparatus
JPS60218672A (ja) * 1984-04-16 1985-11-01 Ricoh Co Ltd 複写装置
JPS60263172A (ja) * 1984-06-11 1985-12-26 Sharp Corp 複写機の画像補正方法
JPH0664384B2 (ja) * 1984-11-27 1994-08-22 株式会社リコー 画像濃度調整方法
JPS6263944A (ja) * 1985-09-13 1987-03-20 Minolta Camera Co Ltd 電子写真複写機
US4708459A (en) * 1986-03-11 1987-11-24 Eastman Kodak Company Electrophotographic color proofing apparatus and method
JPH06105369B2 (ja) * 1986-05-01 1994-12-21 キヤノン株式会社 画像記録装置
US4806980A (en) * 1986-11-06 1989-02-21 Eastman Kodak Company Dynamic feedforward process control for electrographic machines
US4935777A (en) * 1987-07-21 1990-06-19 Sharp Kabushiki Kaisha Method of stabilizing surface potential of photoreceptor for electrophotography
JPS6444958A (en) * 1987-08-13 1989-02-17 Ricoh Kk High voltage power source controller for electrophotography device
US5045952A (en) * 1989-08-21 1991-09-03 Xerox Corporation Method for edge enhanced error diffusion
JPH05257356A (ja) * 1991-03-29 1993-10-08 Canon Inc 画像形成装置
US5502550A (en) * 1991-08-27 1996-03-26 Canon Kabushiki Kaisha Image forming apparatus and method
US5325211A (en) * 1993-01-04 1994-06-28 Xerox Corporation Error diffusion with output and input based feedback
US5621546A (en) * 1993-11-02 1997-04-15 Xerox Corporation Method and apparatus for vector error diffusion with output color control
US5493416A (en) * 1994-10-31 1996-02-20 Xerox Corporation Method combining error diffusion and traditional halftoning with arbitrary screen orientation
JPH08204971A (ja) * 1994-10-31 1996-08-09 Xerox Corp 予測符号化と誤差拡散を用いた画像圧縮方法
JPH08320602A (ja) * 1995-05-24 1996-12-03 Toshiba Corp 画像形成装置
US5668638A (en) * 1996-06-27 1997-09-16 Xerox Corporation Error diffusion method with symmetric enhancement
JP3825963B2 (ja) * 2000-08-30 2006-09-27 キヤノン株式会社 画像形成装置及び画像形成方法
US8004729B2 (en) * 2005-06-07 2011-08-23 Xerox Corporation Low cost adjustment method for printing systems
JP5903782B2 (ja) * 2011-06-27 2016-04-13 ブラザー工業株式会社 画像形成装置
US9709990B2 (en) * 2012-12-21 2017-07-18 Toyota Jidosha Kabushiki Kaisha Autonomous navigation through obstacles

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956487A (en) * 1955-03-23 1960-10-18 Rca Corp Electrostatic printing
JPS5441419B2 (enExample) * 1974-07-12 1979-12-08
JPS5441502B2 (enExample) * 1974-10-21 1979-12-08

Also Published As

Publication number Publication date
DE2901891A1 (de) 1979-07-19
DE2901891B2 (de) 1981-04-30
JPS5497432A (en) 1979-08-01
GB2013109A (en) 1979-08-08
US4256401A (en) 1981-03-17
JPH0125058B2 (enExample) 1989-05-16
GB2013109B (en) 1982-06-23

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Legal Events

Date Code Title Description
OAP Request for examination filed
OD Request for examination
C3 Grant after two publication steps (3rd publication)
8328 Change in the person/name/address of the agent

Free format text: SCHWABE, H., DIPL.-ING. SANDMAIR, K., DIPL.-CHEM. DR.JUR. DR.RER.NAT., PAT.-ANW., 8000 MUENCHEN

8339 Ceased/non-payment of the annual fee