DE69511470D1 - Verfahren und Druckkopf zur Erzeugung von Gradiententondarstellungen - Google Patents

Verfahren und Druckkopf zur Erzeugung von Gradiententondarstellungen

Info

Publication number
DE69511470D1
DE69511470D1 DE69511470T DE69511470T DE69511470D1 DE 69511470 D1 DE69511470 D1 DE 69511470D1 DE 69511470 T DE69511470 T DE 69511470T DE 69511470 T DE69511470 T DE 69511470T DE 69511470 D1 DE69511470 D1 DE 69511470D1
Authority
DE
Germany
Prior art keywords
ink
intensity level
image
representation
pixels
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
DE69511470T
Other languages
English (en)
Other versions
DE69511470T2 (de
Inventor
David B Wallace
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.)
Compaq Computer Corp
Original Assignee
Compaq Computer 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 Compaq Computer Corp filed Critical Compaq Computer Corp
Publication of DE69511470D1 publication Critical patent/DE69511470D1/de
Application granted granted Critical
Publication of DE69511470T2 publication Critical patent/DE69511470T2/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
    • H04N1/405—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
    • H04N1/4057—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 being a mixture of differently sized sub-patterns, e.g. spots having only a few different diameters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/10—Finger type piezoelectric elements

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
  • Color, Gradation (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Fax Reproducing Arrangements (AREA)
  • Coloring (AREA)
  • Stereophonic Arrangements (AREA)
DE69511470T 1994-06-15 1995-06-06 Verfahren und Druckkopf zur Erzeugung von Gradiententondarstellungen Expired - Lifetime DE69511470T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25986294A 1994-06-15 1994-06-15

Publications (2)

Publication Number Publication Date
DE69511470D1 true DE69511470D1 (de) 1999-09-23
DE69511470T2 DE69511470T2 (de) 1999-12-16

Family

ID=22986738

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69511470T Expired - Lifetime DE69511470T2 (de) 1994-06-15 1995-06-06 Verfahren und Druckkopf zur Erzeugung von Gradiententondarstellungen

Country Status (6)

Country Link
US (1) US6170930B1 (de)
EP (1) EP0688130B1 (de)
JP (1) JP2863465B2 (de)
AT (1) ATE183608T1 (de)
CA (1) CA2151093C (de)
DE (1) DE69511470T2 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0000368D0 (en) * 2000-01-07 2000-03-01 Xaar Technology Ltd Droplet deposition apparatus
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
ATE369989T1 (de) * 2003-09-30 2007-09-15 Brother Ind Ltd Tintenpatrone und tintenstrahlaufzeichnungsgerät
US7482197B2 (en) * 2004-12-17 2009-01-27 International Business Machines Corporation Method and apparatus for deploying a liquid metal thermal interface for chip cooling
US20080030793A1 (en) * 2006-07-26 2008-02-07 Microsoft Corporation Fax Accounts
US20080061471A1 (en) * 2006-09-13 2008-03-13 Spin Master Ltd. Decorative moulding toy
US7651204B2 (en) * 2006-09-14 2010-01-26 Hewlett-Packard Development Company, L.P. Fluid ejection device
US7914125B2 (en) 2006-09-14 2011-03-29 Hewlett-Packard Development Company, L.P. Fluid ejection device with deflective flexible membrane
US8418523B2 (en) 2008-03-03 2013-04-16 Keith Lueck Calibration and accuracy check system for a breath tester

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55113579A (en) * 1979-02-26 1980-09-02 Hitachi Ltd Graphic plotter
US4554593A (en) * 1981-01-02 1985-11-19 International Business Machines Corporation Universal thresholder/discriminator
US4523201A (en) 1982-12-27 1985-06-11 Exxon Research & Engineering Co. Method for improving low-velocity aiming in operating an ink jet apparatus
DE3306098A1 (de) 1983-02-22 1984-08-23 Siemens AG, 1000 Berlin und 8000 München Piezoelektrisch betriebener schreibkopf mit kanalmatrize
US4513299A (en) 1983-12-16 1985-04-23 International Business Machines Corporation Spot size modulation using multiple pulse resonance drop ejection
US4651287A (en) * 1984-06-14 1987-03-17 Tsao Sherman H Digital image processing algorithm for output devices with discrete halftone gray scale capability
US4635087A (en) * 1984-12-28 1987-01-06 Motorola, Inc. Monolithic bipolar SCR memory cell
DD236197A1 (de) * 1985-04-11 1986-05-28 Robotron Bueromasch Verfahren zum darstellen von halbtonbildern
IT1183811B (it) 1985-05-02 1987-10-22 Olivetti & Co Spa Circuito di pilotaggio per un elemento di scrittura a getto di inchiostro e relativo metodo di dimensionamento e di fabbricazione
IT1182478B (it) 1985-07-01 1987-10-05 Olivetti & Co Spa Circuito di pilotaggio e di cancellazione di onde riflesse per una testina di stampa a getto di inchiostro
JPS6288476A (ja) * 1985-10-15 1987-04-22 Seiko Instr & Electronics Ltd 画像プリンタ
JPH0624877B2 (ja) * 1986-05-15 1994-04-06 日本電気株式会社 インクジエツト記録方式
US4680645A (en) * 1986-08-25 1987-07-14 Hewlett-Packard Company Method for rendering gray scale images with variable dot sizes
US4879568A (en) 1987-01-10 1989-11-07 Am International, Inc. Droplet deposition apparatus
GB8824014D0 (en) 1988-10-13 1988-11-23 Am Int High density multi-channel array electrically pulsed droplet deposition apparatus
US5111302A (en) * 1988-12-02 1992-05-05 Hewlett-Packard Company Method and system for enhancing the quality of both color and black and white images produced by ink jet and electrophotographic printers
GB8829567D0 (en) 1988-12-19 1989-02-08 Am Int Method of operating pulsed droplet deposition apparatus
US4963882B1 (en) 1988-12-27 1996-10-29 Hewlett Packard Co Printing of pixel locations by an ink jet printer using multiple nozzles for each pixel or pixel row
JP2812476B2 (ja) * 1989-02-28 1998-10-22 キヤノン株式会社 インクジェット記録装置
JP2980355B2 (ja) * 1990-09-10 1999-11-22 キヤノン株式会社 インクジェット記録方法およびインクジェット記録装置
EP0485241B1 (de) 1990-11-09 1997-03-12 Citizen Watch Co., Ltd. Tintenstrahlkopf
JPH04363250A (ja) 1991-03-19 1992-12-16 Tokyo Electric Co Ltd インクジェットプリンタヘッド及びその製造方法
US5461403A (en) * 1991-08-16 1995-10-24 Compaq Computer Corporation Droplet volume modulation techniques for ink jet printheads
US5227813A (en) 1991-08-16 1993-07-13 Compaq Computer Corporation Sidewall actuator for a high density ink jet printhead
US5200831A (en) * 1992-06-05 1993-04-06 Eastman Kodak Company Method and arrangement for locally switching gray dot types to reproduce an image with gray level printing
US5557304A (en) * 1993-05-10 1996-09-17 Compaq Computer Corporation Spot size modulatable ink jet printhead

Also Published As

Publication number Publication date
EP0688130A3 (de) 1996-03-13
EP0688130B1 (de) 1999-08-18
JPH07329319A (ja) 1995-12-19
JP2863465B2 (ja) 1999-03-03
EP0688130A2 (de) 1995-12-20
CA2151093A1 (en) 1995-12-16
CA2151093C (en) 1998-11-03
DE69511470T2 (de) 1999-12-16
ATE183608T1 (de) 1999-09-15
US6170930B1 (en) 2001-01-09

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition