DE69722370T2 - Kompensation mit geschlossener Schleife für Grautondruckvorrichtungen - Google Patents

Kompensation mit geschlossener Schleife für Grautondruckvorrichtungen Download PDF

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Publication number
DE69722370T2
DE69722370T2 DE69722370T DE69722370T DE69722370T2 DE 69722370 T2 DE69722370 T2 DE 69722370T2 DE 69722370 T DE69722370 T DE 69722370T DE 69722370 T DE69722370 T DE 69722370T DE 69722370 T2 DE69722370 T2 DE 69722370T2
Authority
DE
Germany
Prior art keywords
laser
pulse width
optical sensor
signal
laser pulses
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
DE69722370T
Other languages
German (de)
English (en)
Other versions
DE69722370D1 (de
Inventor
Mark B. Boise Hirst
Mark Boise Wibbels
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.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Co
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 Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of DE69722370D1 publication Critical patent/DE69722370D1/de
Application granted granted Critical
Publication of DE69722370T2 publication Critical patent/DE69722370T2/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
    • H04N1/4005—Circuits exciting or modulating particular heads for reproducing continuous tone value scales with regulating circuits, e.g. dependent upon ambient temperature or feedback control
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laser Beam Printer (AREA)
  • Dot-Matrix Printers And Others (AREA)
DE69722370T 1997-01-31 1997-07-31 Kompensation mit geschlossener Schleife für Grautondruckvorrichtungen Expired - Lifetime DE69722370T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/791,879 US6014161A (en) 1997-01-31 1997-01-31 Closed loop compensation for gray scale printing devices
US791879 1997-01-31

Publications (2)

Publication Number Publication Date
DE69722370D1 DE69722370D1 (de) 2003-07-03
DE69722370T2 true DE69722370T2 (de) 2004-03-25

Family

ID=25155068

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69722370T Expired - Lifetime DE69722370T2 (de) 1997-01-31 1997-07-31 Kompensation mit geschlossener Schleife für Grautondruckvorrichtungen

Country Status (4)

Country Link
US (1) US6014161A (enExample)
EP (1) EP0858205B1 (enExample)
JP (1) JPH10217535A (enExample)
DE (1) DE69722370T2 (enExample)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6950094B2 (en) 1998-03-30 2005-09-27 Agilent Technologies, Inc Seeing eye mouse for a computer system
US5786804A (en) 1995-10-06 1998-07-28 Hewlett-Packard Company Method and system for tracking attitude
JP4308338B2 (ja) * 1998-01-16 2009-08-05 株式会社東芝 ビーム光走査装置および画像形成装置
EP1142299B1 (de) * 1998-12-21 2003-02-19 Océ Printing Systems GmbH Mit mindestens drei helligkeitsstufen arbeitende druckvorrichtung sowie damit auszuführende verfahren zum festlegen von druckparametern
US6175375B1 (en) * 2000-01-25 2001-01-16 Lexmark International, Inc. Method and apparatus for compensating for a darkness shift during the life of an electrophotographic printer cartridge
US6975427B1 (en) 2000-03-27 2005-12-13 International Business Machines Corporation Method, system, and program for using look-up tables to filter raster data
US7064859B1 (en) 2000-03-27 2006-06-20 International Business Machines Corporation Method, system, program, and data structure for producing a look-up table to enhance print quality
US6975428B1 (en) 2000-03-27 2005-12-13 International Business Machines Corporation Method, system, and program for reducing toner usage in print output
JP2001318329A (ja) * 2000-05-11 2001-11-16 Noritsu Koki Co Ltd 光走査装置およびこれを備えた写真処理装置
US6982814B1 (en) 2000-08-23 2006-01-03 Hewlett-Packard Development Company, L.P. Image printing devices with AM/FM half-toning with self-determination of dot size and method of implementing same
US6606330B2 (en) 2001-05-07 2003-08-12 Lexmark International, Inc. Laser drive compensation by duty cycle and power
JP4322442B2 (ja) * 2001-05-18 2009-09-02 株式会社リコー 画像形成装置
US6856340B2 (en) * 2003-01-28 2005-02-15 Hewlett-Packard Development Company, L.P. System and method for clock independent pulse width modulation
US7206012B2 (en) * 2004-03-24 2007-04-17 Lexmark International, Inc. Memory device on optical scanner and apparatus and method for storing characterizing information on the memory device
JP4508890B2 (ja) * 2005-01-25 2010-07-21 キヤノン株式会社 画像形成装置、画像形成方法、及びプログラム

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827074A1 (de) * 1977-06-21 1979-01-04 Canon Kk Aufzeichnungsgeraet
US4429218A (en) * 1981-05-11 1984-01-31 Xerox Corporation Scanning beam detector
US4578689A (en) * 1984-11-26 1986-03-25 Data Recording Systems, Inc. Dual mode laser printer
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
US4794413A (en) * 1986-08-20 1988-12-27 Canon Kabushiki Kaisha Image recording apparatus
JPH0626421B2 (ja) * 1987-02-25 1994-04-06 富士写真フイルム株式会社 半導体レ−ザのドル−プ補正装置
US4899344A (en) * 1987-12-07 1990-02-06 Ricoh Co., Ltd. Semiconductor laser control apparatus
US4914459A (en) * 1988-04-18 1990-04-03 Ricoh Company, Ltd. Image forming apparatus
US5017944A (en) * 1989-03-06 1991-05-21 Victor Company Of Japan, Ltd. Control system for information recording laser beam
JPH03126053A (ja) * 1989-10-12 1991-05-29 Ricoh Co Ltd 画像形成装置
US5200765A (en) * 1990-03-26 1993-04-06 Eastman Kodak Company Apparatus and method for calibrating a grey level printhead
US5602814A (en) * 1994-10-06 1997-02-11 International Business Machines Corporation Calibration of write-once disks using a single disk sector

Also Published As

Publication number Publication date
US6014161A (en) 2000-01-11
EP0858205B1 (en) 2003-05-28
EP0858205A1 (en) 1998-08-12
DE69722370D1 (de) 2003-07-03
JPH10217535A (ja) 1998-08-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: HEWLETT-PACKARD DEVELOPMENT CO., L.P., HOUSTON, TE