DE69034055D1 - Bilderzeugungsgerät und Modulationsverfahren - Google Patents

Bilderzeugungsgerät und Modulationsverfahren

Info

Publication number
DE69034055D1
DE69034055D1 DE69034055T DE69034055T DE69034055D1 DE 69034055 D1 DE69034055 D1 DE 69034055D1 DE 69034055 T DE69034055 T DE 69034055T DE 69034055 T DE69034055 T DE 69034055T DE 69034055 D1 DE69034055 D1 DE 69034055D1
Authority
DE
Germany
Prior art keywords
imaging device
modulation method
modulation
imaging
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 - Lifetime
Application number
DE69034055T
Other languages
English (en)
Inventor
Masaki Ojima
Masaharu Ohkubo
Takashi Kawana
Michio Itoh
Hiroshi Mano
Hiroshi Sasame
Kaoru Seto
Hiromichi Yamada
Hiroshi Atobe
Tetsuo Saito
Atsushi Kashihara
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
Priority claimed from JP1255294A external-priority patent/JP3037345B2/ja
Priority claimed from JP26822789A external-priority patent/JPH03131125A/ja
Priority claimed from JP1299732A external-priority patent/JP2940963B2/ja
Application filed by Canon Inc filed Critical Canon Inc
Application granted granted Critical
Publication of DE69034055D1 publication Critical patent/DE69034055D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40043—Circuits exciting or modulating particular heads for reproducing continuous tone value scales using more than one type of modulation, e.g. pulse width modulation and amplitude modulation
    • 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
    • H04N1/40025—Circuits exciting or modulating particular heads for reproducing continuous tone value scales
    • H04N1/40037—Circuits exciting or modulating particular heads for reproducing continuous tone value scales the reproducing element being a laser
    • 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Laser Beam Printer (AREA)
  • Dot-Matrix Printers And Others (AREA)
  • Color, Gradation (AREA)
DE69034055T 1989-10-02 1990-10-01 Bilderzeugungsgerät und Modulationsverfahren Expired - Lifetime DE69034055D1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1255294A JP3037345B2 (ja) 1989-10-02 1989-10-02 画像データ変調装置
JP26822789A JPH03131125A (ja) 1989-10-17 1989-10-17 パルス幅変調回路
JP1299732A JP2940963B2 (ja) 1989-11-20 1989-11-20 画像処理装置

Publications (1)

Publication Number Publication Date
DE69034055D1 true DE69034055D1 (de) 2003-05-08

Family

ID=27334417

Family Applications (2)

Application Number Title Priority Date Filing Date
DE69034055T Expired - Lifetime DE69034055D1 (de) 1989-10-02 1990-10-01 Bilderzeugungsgerät und Modulationsverfahren
DE69030701T Expired - Fee Related DE69030701T2 (de) 1989-10-02 1990-10-01 Bilderzeugungsgerät und Modulationsverfahren

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE69030701T Expired - Fee Related DE69030701T2 (de) 1989-10-02 1990-10-01 Bilderzeugungsgerät und Modulationsverfahren

Country Status (3)

Country Link
US (2) US5379126A (de)
EP (2) EP0760578B1 (de)
DE (2) DE69034055D1 (de)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0520093B1 (de) * 1991-06-24 1996-09-25 Agfa-Gevaert N.V. Parallel-Serie-Umwandlung von Informationsdaten
US5467422A (en) * 1991-08-13 1995-11-14 Konica Corporation Image forming apparatus with neighboring pixel processing
JPH05300346A (ja) * 1992-04-20 1993-11-12 Konica Corp 画像形成装置
EP0670654B1 (de) * 1994-03-02 2001-04-18 Hewlett-Packard Company, A Delaware Corporation Erzeugung von Mehrfachtonbildern
GB9407116D0 (en) * 1994-04-11 1994-06-01 Secr Defence Ferroelectric liquid crystal display with greyscale
IT1268925B1 (it) * 1994-04-12 1997-03-13 Syfal Srl Apparecchiatura per l'incisione di matrici cilindriche in gomma.
US7031020B1 (en) * 1994-04-22 2006-04-18 Canon Kabushiki Kaisha Image processing method, apparatus and controller
JP3703162B2 (ja) * 1994-04-22 2005-10-05 キヤノン株式会社 画像形成装置
KR100219831B1 (ko) * 1994-12-06 1999-09-01 니시모토 칸이치 노광장치
JPH08185021A (ja) * 1994-12-27 1996-07-16 Canon Inc 画像形成装置
US5729663A (en) * 1995-12-07 1998-03-17 Xerox Corporation Method and apparatus for gray screening
JP3618912B2 (ja) 1996-07-12 2005-02-09 キヤノン株式会社 画像形成装置
US6091891A (en) * 1997-05-09 2000-07-18 Lexmark International, Inc. Method and apparatus for calibrating delay lines to create gray levels in continuous tone printing
US5867203A (en) * 1997-05-16 1999-02-02 Lexmark International Inc. EMI reduction in output devices
EP0892500B1 (de) * 1997-07-17 2003-02-26 STMicroelectronics S.r.l. System zur Auflösungserhöhung bei der Umwandlung von digitalen Daten in PWM-Signale zur Steuerung einer Vollbrückenausgangsstufe
US6362898B1 (en) * 1997-10-31 2002-03-26 In-System Design, Inc. Pulse width position modulator and clock skew synchronizer
US5990923A (en) * 1997-11-14 1999-11-23 Hewlett-Packard Company High resolution dynamic pulse width modulation
JP3073486B2 (ja) * 1998-02-16 2000-08-07 キヤノン株式会社 画像形成装置及び電子線装置及び変調回路及び画像形成装置の駆動方法
JP3470626B2 (ja) * 1999-01-08 2003-11-25 富士ゼロックス株式会社 電子写真装置及び方法
JP3844180B2 (ja) * 1999-09-27 2006-11-08 リコープリンティングシステムズ株式会社 分割分散ｐｗｍ階調処理装置及びこれを備えたレーザプリンタ
JP3983449B2 (ja) * 1999-10-15 2007-09-26 株式会社リコー パルス幅変調回路、光書き込み装置及び画像形成装置
US6476844B1 (en) 2000-10-12 2002-11-05 Lexmark International, Inc. Method and apparatus for electrophotographic laser video modulation and decode for spot fidelity
JP2002356008A (ja) * 2001-02-02 2002-12-10 Ricoh Co Ltd 画像形成装置及び方法
US6992792B2 (en) * 2001-06-29 2006-01-31 Electronics For Imaging, Inc. Digital pulse width modulator for use in electrostatic printing mechanisms
JP3938144B2 (ja) * 2004-02-17 2007-06-27 キヤノン株式会社 画像形成装置、その制御方法、及び制御プログラム
JP2006095931A (ja) * 2004-09-30 2006-04-13 Dainippon Screen Mfg Co Ltd 印刷版の製版方法および印刷版の製版装置
ATE416917T1 (de) * 2004-09-30 2008-12-15 Dainippon Screen Mfg Verfahren zur herstellung einer druckplatte und druckplattenherstellungsgerät
JP4795473B2 (ja) * 2009-06-29 2011-10-19 キヤノン株式会社 画像処理装置及びその制御方法
TWI532323B (zh) 2013-08-14 2016-05-01 財團法人工業技術研究院 數位脈波寬度產生器及其產生方法
JP2015075748A (ja) * 2013-10-11 2015-04-20 キヤノン株式会社 画像形成装置、その制御方法、及びプログラム
US11513799B2 (en) * 2019-11-04 2022-11-29 Apple Inc. Chained buffers in neural network processor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56138328A (en) * 1980-03-31 1981-10-28 Chiyou Lsi Gijutsu Kenkyu Kumiai Frequency multiplying circuit
JPS56152373A (en) * 1980-04-24 1981-11-25 Fuji Photo Film Co Ltd Laser recording device
US4365202A (en) * 1980-08-25 1982-12-21 Rca Corporation Duty cycle generator with improved resolution
US4415907A (en) * 1980-11-07 1983-11-15 Hitachi, Ltd. Printing pulse control circuit for thermal printing head
CA1171130A (en) * 1981-02-18 1984-07-17 Shigemichi Honda Electrostatic printing apparatus
US4413269A (en) * 1981-11-23 1983-11-01 International Business Machines Corporation Method of and apparatus for controlling gray scale while printing on charge sensitive recording mediums
JPS58114570A (ja) * 1981-12-26 1983-07-07 Canon Inc 画像処理装置
DE3274710D1 (en) * 1982-09-28 1987-01-22 Delta Scan Inc Method and apparatus for producing images on radiation sensitive recording mediums
JPS59131225A (ja) * 1983-01-17 1984-07-28 Fujitsu General Ltd パルス幅変調方法とその装置
JPH071917B2 (ja) * 1983-06-01 1995-01-11 キヤノン株式会社 画像処理装置
JPS60100831A (ja) * 1983-11-07 1985-06-04 Sony Corp デジタル・アナログ変換装置
JPS60116220A (ja) * 1983-11-28 1985-06-22 Matsushita Electric Ind Co Ltd デジタル信号用周波数逓倍装置
JPS6130118A (ja) * 1984-07-20 1986-02-12 Nec Corp タイマ−回路
US4679057A (en) * 1984-11-22 1987-07-07 Minolta Camera Kabushiki Kaisha Laser recording apparatus
US4800442A (en) * 1985-08-15 1989-01-24 Canon Kabushiki Kaisha Apparatus for generating an image from a digital video signal
JP2647366B2 (ja) * 1985-08-29 1997-08-27 キヤノン株式会社 画像処理装置
US4633222A (en) * 1985-10-01 1986-12-30 Rca Corporation Clock shaping circuit and method
EP0717551B1 (de) * 1986-02-14 2000-05-17 Canon Kabushiki Kaisha Bildverarbeitungsgerät
JP2524108B2 (ja) * 1986-02-24 1996-08-14 富士写真フイルム株式会社 光走査記録装置
JPS6345973A (ja) * 1986-08-12 1988-02-26 Canon Inc 中間調画像処理装置
JPS6374664A (ja) * 1986-09-18 1988-04-05 Sony Corp 感熱ヘツドの駆動回路
JPS6467030A (en) * 1987-09-07 1989-03-13 Yamaha Corp Pwm circuit
JPH0681513B2 (ja) * 1987-11-12 1994-10-12 株式会社東芝 Ｐｗｍ制御装置
JPH01258953A (ja) * 1988-04-08 1989-10-16 Ricoh Co Ltd レーザ書込み装置
US5124802A (en) * 1989-09-26 1992-06-23 Canon Kabushiki Kaisha Electrostatic lasar printer with a short side length of a modulation area formed by pulse width modulation set relative to a detected toner particle size

Also Published As

Publication number Publication date
DE69030701T2 (de) 1997-10-02
EP0760578B1 (de) 2003-04-02
EP0421712A2 (de) 1991-04-10
US5379126A (en) 1995-01-03
EP0760578A2 (de) 1997-03-05
DE69030701D1 (de) 1997-06-19
US5488487A (en) 1996-01-30
EP0421712A3 (en) 1992-08-19
EP0421712B1 (de) 1997-05-14
EP0760578A3 (de) 1998-03-04

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Legal Events

Date Code Title Description
8332 No legal effect for de