DE69028822D1 - Prozesssteuerung für einen elektrostatographischen Drucker - Google Patents

Prozesssteuerung für einen elektrostatographischen Drucker

Info

Publication number
DE69028822D1
DE69028822D1 DE69028822T DE69028822T DE69028822D1 DE 69028822 D1 DE69028822 D1 DE 69028822D1 DE 69028822 T DE69028822 T DE 69028822T DE 69028822 T DE69028822 T DE 69028822T DE 69028822 D1 DE69028822 D1 DE 69028822D1
Authority
DE
Germany
Prior art keywords
process control
electrostatographic printer
electrostatographic
printer
control
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 - Fee Related
Application number
DE69028822T
Other languages
English (en)
Other versions
DE69028822T2 (de
Inventor
Thomas A Hayes
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Publication of DE69028822D1 publication Critical patent/DE69028822D1/de
Application granted granted Critical
Publication of DE69028822T2 publication Critical patent/DE69028822T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture
    • H04N1/4078—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture using gradational references, e.g. grey-scale test pattern analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/405—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
    • H04N1/4055—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern
    • H04N1/4056—Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels producing a clustered dots or a size modulated halftone pattern the pattern varying in one dimension only, e.g. dash length, pulse width modulation [PWM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/407—Control or modification of tonal gradation or of extreme levels, e.g. background level
    • H04N1/4076—Control or modification of tonal gradation or of extreme levels, e.g. background level dependent on references outside the picture

Landscapes

  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Control Or Security For Electrophotography (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Facsimile Heads (AREA)
  • Color Electrophotography (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Laser Beam Printer (AREA)
DE69028822T 1989-07-31 1990-07-27 Prozesssteuerung für einen elektrostatographischen Drucker Expired - Fee Related DE69028822T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/387,259 US4914455A (en) 1989-07-31 1989-07-31 Process control for electrostatographic printers

Publications (2)

Publication Number Publication Date
DE69028822D1 true DE69028822D1 (de) 1996-11-14
DE69028822T2 DE69028822T2 (de) 1997-03-20

Family

ID=23529130

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69028822T Expired - Fee Related DE69028822T2 (de) 1989-07-31 1990-07-27 Prozesssteuerung für einen elektrostatographischen Drucker

Country Status (5)

Country Link
US (1) US4914455A (de)
EP (1) EP0411844B1 (de)
JP (1) JP2763185B2 (de)
CA (1) CA2019683C (de)
DE (1) DE69028822T2 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03165176A (ja) * 1989-11-22 1991-07-17 Ricoh Co Ltd 画像記録装置
ATE119475T1 (de) * 1990-11-21 1995-03-15 Polaroid Corp Druckgerät.
US5221971A (en) * 1990-11-21 1993-06-22 Polaroid Corporation Area modulation printing apparatus
WO1992010054A1 (en) * 1990-11-21 1992-06-11 Polaroid Corporation Printing method
US5170261A (en) * 1990-11-21 1992-12-08 Polaroid Corporation Printing method
US5341165A (en) * 1991-01-16 1994-08-23 Canon Kabushiki Kaisha Scanning controller for color electrophotographic apparatus
JP3215894B2 (ja) * 1992-01-23 2001-10-09 コニカ株式会社 画像形成装置
US6501492B1 (en) * 1992-11-13 2002-12-31 Canon Kabushiki Kaisha Image forming apparatus for outputting image in response to digital image signal
US5864355A (en) * 1997-03-20 1999-01-26 Lexmark International, Inc. Image forming apparatus with laser calibration during ramp-up period of an optical device
US6657742B1 (en) * 1997-11-24 2003-12-02 Xerox Corporation System for printing facsimile jobs with a property profile
JP2006255970A (ja) * 2005-03-15 2006-09-28 Ricoh Co Ltd インクジェットプリンタおよび複写装置
US7545333B2 (en) * 2006-03-16 2009-06-09 Agc Automotive Americas R&D Multiple-layer patch antenna
US20090196529A1 (en) * 2008-02-06 2009-08-06 William Su System and method for content sensitive document processing

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2017431A1 (de) * 1970-04-11 1971-11-04 Bosch Elektronik Gmbh Verfahren zur elektrischen Übertragung von Bildvorlagen
US4196451A (en) * 1976-05-21 1980-04-01 Xerox Corporation Electronic halftone generator
US4149183A (en) * 1976-05-21 1979-04-10 Xerox Corporation Electronic halftone generator
JPS56153881A (en) * 1980-04-30 1981-11-28 Fuji Photo Film Co Ltd Half tone picture recording device
JPS5782057A (en) * 1980-11-11 1982-05-22 Fuji Photo Film Co Ltd Density adjusting method in recording of picture
US4661859A (en) * 1981-06-03 1987-04-28 Xerox Corporation Pulse width modulation greyscale system for halftone printer
JPS59163952A (ja) * 1983-03-08 1984-09-17 Canon Inc 画像処理装置
DE3438949C2 (de) * 1983-10-25 1994-03-10 Canon Kk Druckvorrichtung
US4641200A (en) * 1984-02-10 1987-02-03 Konishiroku Photo Industry Co., Ltd. Image reproducing apparatus with variable AC bias
JP2691205B2 (ja) * 1985-04-19 1997-12-17 株式会社リコー 光走査装置
US4800442A (en) * 1985-08-15 1989-01-24 Canon Kabushiki Kaisha Apparatus for generating an image from a digital video signal
JPH067660B2 (ja) * 1985-08-29 1994-01-26 キヤノン株式会社 光ビ−ム走査装置
JPH0683358B2 (ja) * 1985-10-17 1994-10-19 キヤノン株式会社 画像情報処理装置の調整方法
US4847695A (en) * 1986-02-06 1989-07-11 Canon Kabushiki Kaisha Image processing apparatus in which the minimum and maximum widths of a pulse-width modulated signal can be independently adjusted in accordance with predetermined data signals
US4782398A (en) * 1986-02-14 1988-11-01 Canon Kabushiki Kaisha Image processing apparatus
JPS62247671A (ja) * 1986-04-18 1987-10-28 Minolta Camera Co Ltd レ−ザビ−ムプリンタの濃度調整方法
JPS63293567A (ja) * 1987-05-27 1988-11-30 Canon Inc レーザービームプリンタ

Also Published As

Publication number Publication date
DE69028822T2 (de) 1997-03-20
CA2019683A1 (en) 1991-01-31
EP0411844A3 (en) 1992-03-04
JP2763185B2 (ja) 1998-06-11
EP0411844A2 (de) 1991-02-06
JPH0370264A (ja) 1991-03-26
EP0411844B1 (de) 1996-10-09
CA2019683C (en) 1994-11-01
US4914455A (en) 1990-04-03

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee