EP0730969B1 - Punktausrichtung für Drucker mit gemischter Auflösung - Google Patents

Punktausrichtung für Drucker mit gemischter Auflösung Download PDF

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Publication number
EP0730969B1
EP0730969B1 EP19950308424 EP95308424A EP0730969B1 EP 0730969 B1 EP0730969 B1 EP 0730969B1 EP 19950308424 EP19950308424 EP 19950308424 EP 95308424 A EP95308424 A EP 95308424A EP 0730969 B1 EP0730969 B1 EP 0730969B1
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EP
European Patent Office
Prior art keywords
dots
printhead
size
resolution
carriage
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
EP19950308424
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English (en)
French (fr)
Other versions
EP0730969A1 (de
Inventor
Nicholas Nicoloff
Mark S. Hickman
John A. Christianson
Douglas L. Franz
Donald G. Harris
Majid Azmoon
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HP Inc
Original Assignee
Hewlett Packard Co
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Filing date
Publication date
Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0730969A1 publication Critical patent/EP0730969A1/de
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Publication of EP0730969B1 publication Critical patent/EP0730969B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/485—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes
    • B41J2/505—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements
    • B41J2/51—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by the process of building-up characters or image elements applicable to two or more kinds of printing or marking processes from an assembly of identical printing elements serial printer type
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2121—Ink jet for multi-colour printing characterised by dot size, e.g. combinations of printed dots of different diameter
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding

Definitions

  • EP-A-0 654 352 (Art. 54.3 EPC), published on 24.05.1995, entitled MIXED RESOLUTION PRINTING FOR COLOR AND MONOCHROME PRINTERS, by Donald G. Harris, et al, represents the closest prior art.
  • This application also relates to the copending applications EP-A-0 622 206, entitled DATUM FORMATION FOR IMPROVED ALIGNMENT OF MULTIPLE NOZZLE MEMBERS IN A PRINTER, by Jeffrey A. Thoman, et al., and EP-A-0 592 221, entitled PRINTHEAD WITH REDUCED INTERCONNECTIONS TO A PRINTER, by Michael B. Saunders, et al., both owned by the assignee of this application and incorporated herein by reference.
  • This invention relates generally to printers, and more specifically to printing devices and techniques for monochrome and color printers capable of achieving high quality resolution.
  • High quality printers are typically characterized by numbers indicating their resolution in dots per inch (dpi). This resolution is usually described in the context of a two dimension coordinate system where one number indicates the resolution in the x-axis (as used herein, x-axis means the carriage scan axis for a swath printer), and another number indicates the resolution in the y-axis (as used herein, y-axis means the media advance axis for a swath printer).
  • a resolution of 300/300 dpi generally indicates a carriage-scan axis resolution of 300 dots per inch and a media-advance axis resolution of 300 dots per inch. If only a single dpi number is given, it is assumed the dpi in both axes are equal.
  • the resolution of a printhead is primarily determined by the actual printout dot size as it appears in a printout.
  • Hewlett-Packard has developed a 600 dpi inkjet pen for producing a very high resolution printout.
  • One embodiment of this pen is described in Hewlett-Packard's EP-A-0 564 069 by Brian J. Keefe, et al., entitled INK DELIVERY SYSTEM FOR AN INKJET PRINTHEAD, incorporated herein by reference.
  • the nozzle array of this 600 dpi pen contains 300 nozzles and prints a swath approximately one-half inch wide along the x-axis.
  • Some of Hewlett-Packard's color printers will include a scanning carriage housing the 600 dpi pen, containing black ink, as well as one or more color inkjet pens. Currently these color inkjet pens have a resolution of 300 dpi and a width on the order of one-third inch.
  • the particular alignment of the 600 dpi and 300 dpi resolution printheads in the carriage as well as the particular alignment of the printed high resolution dots and lower resolution dots can be selected to achieve certain characteristics and advantages.
  • Prior art document IBM Technical Disclosure Bulletin, Volume 23, No.7a, December 1980 discloses a mixed resolution printer with a frame for holding a medium for being printed upon in a print zone, a scanning carriage supported in said frame to be positioned proximate to said print zone and first and second printheads supported by the carriage.
  • the first printhead is a high resolution black printhead and the second printhead is a low resolution black printhead in order to provide a printer which prints black in a variety of modes.
  • Prior art document JP-A-5261941 discloses a mixed resolution printhead unit including four printheads including a black printhead which prints dots that are larger than dots printed by the colour printheads.
  • a mixed resolution printer as defined in the claims.
  • a method for printing as defined in the claims.
  • a scanning carriage in a color inkjet printer houses a high resolution printhead for black (or monochrome) printing and one or more lower resolution printheads for color printing.
  • the nozzle arrangements, paper feed increments, and ink drop firing frequency for the black printhead and color printhead(s) are selected to provide various alignments between the larger color ink dots and the smaller black ink dots to achieve maximum ink coverage with a minimum of ink or to achieve additional color shades.
  • the centroid of a group of four smaller dots is aligned with the centroid of a larger dot along the scanning direction (i.e., x direction).
  • the midpoint between two vertically aligned smaller dots is aligned with the centroid of a larger dot along the scanning direction.
  • Each smaller dot in a cluster of four smaller dots may be positioned around the centroid of the cluster at 90° angles with respect to the x and y axes or at 45° angles with respect to the x and y axes.
  • the output quality of a printed page is a function of printhead resolution. The higher the resolution the better the print quality. Also, in a swath printer employing a scanning carriage, the speed at which the output can be obtained is a function of the width of the swath which is covered by the printhead.
  • each pen has the same resolution and usually the same swath width. This means that all the supporting structure, mechanics and electronics needs to be scaled up to support the resolution of the entire set of pens. All this hardware is more expensive than the hardware to support a multi-resolution, multi-swath width pen set where one pen is at the desired higher resolution and larger width, and the other pens in the set are at a lower resolution and smaller size.
  • One embodiment of the invention incorporates a high resolution inkjet pen and one or more lower resolution inkjet pen(s) in the same scanning carriage in a printer.
  • the higher performance pen can be used to improve output quality by enhancing certain key features that appear frequently in a printed page such as text. Such a pen also improves throughput by being able to print these frequent features faster.
  • the other lower performance pens can be used for less frequent or less demanding features such as graphics and color printing.
  • a 600 dpi 1/2 inch swath black pen with three 300 dpi color pens each generating a swath of approximately 1/3 inch.
  • the high performance black pen is typically used for printing text and other "black only" features, and thus the output quality and throughput of these features is greater. It also improves the output quality of color graphics and color features by teaming with the three lower performance color pens when printing color graphics or color features.
  • the black component of the graphics which is often a large portion of color graphics content, is at a higher resolution and thus at a higher output quality level.
  • the larger swath can then be combined with printing algorithms to improve the throughput of color graphics.
  • inkjet printer 10 includes an input tray 12 containing sheets of media 14 which pass through a print zone, and are fed past an exit 18 into an output tray 16.
  • a movable carriage 20 holds print cartridges 22, 24, 26, and 28 which respectively hold yellow (Y), magenta (M), cyan (C) and black (K) inks.
  • the front of the carriage has a support bumper 30 which rides along a guide 32 while the back of the carriage has multiple bushings such as 34 which ride along slide rod 36.
  • the position of the carriage as it traverses back and forth across the media is determined from an encoder strip 38 in order to be sure that the various ink nozzles on each print cartridge are selectively fired at the appropriate time during a carriage scan.
  • the color print cartridges 22, 24, and 26 are replaced by a single tricolor cartridge having a nozzle plate such as shown in FIG. 14, 15, or 16.
  • a 300 dpi color inkjet cartridge 40 having a tab-circuit with a four column thirty-two pad electrical interconnect 42 is removably installed in three chutes 44, 46, 48 of a unitary carriage 50 (FIG. 4).
  • a flex-circuit member 52 (FIG. 6) having three matching sets of conductive pads 54, 56, 58 is mounted on flex-frame pins 60 for operative engagement with the cartridge pads when the cartridge is inserted into its appropriate chute.
  • An enlarged set of conductive pads 62 covering a larger area, having a different layout, and constituting an array of six columns totaling fifty-two conductive pads on the flex-circuit member is designed for operative engagement with cartridge pads on a 600 dpi black inkjet cartridge 64 (see FIG. 9).
  • the X-axis cartridge datums 65 engage the X-axis carriage datums 66
  • the Y-axis cartridge datums 67 engage the Y-axis carriage datums 68
  • the Z-axis cartridge datums 69 engage the Z-axis carriage datums 70 in a manner more fully described in the copending applications identified above and incorporated by reference herein.
  • a unique spring assembly for the 600 dpi cartridge interconnect includes a unitary resilient foam member 84 which fits in a seat 86 which is larger than the aperture 80.
  • a mounting peg 88 fits into matching hole 90 which along with bottom and lower ledges 91, 93 and upper side and top ledges 92, 94 hold the foam member in proper position to assure operative engagement across the electrical interconnect.
  • FIGS. 7-8 show one possible mounting relationship between a 300 dpi nozzle array 96 of the color printheads and a 600 dpi nozzle array 98 of the black printhead.
  • Control circuitry 99 (including a multiplexer) on the substrate enables the three hundred firing resistors of the black printhead to be controlled through fifty-two electrical interconnect pads, and similarly enables all one hundred four firing resistors of each color printhead to be controlled through thirty-two electrical interconnect pads.
  • FIG. 12 schematically shows the difference between the 300 dpi printout produced by the color pens (i.e., pen cartridges) and the 600 dpi printout of the black pen of the preferred embodiment described herein.
  • the resolution difference may be arbitrary, depending on the printheads available and already developed, or wherein the resolution difference may be decimally related (e.g., 20% greater resolution, 30% greater resolution, etc.) or fractionally related (300 dpi with 400 dpi; 300 dpi with 450 dpi, etc.).
  • the invention can be implemented with any of the existing inkjet cartridges which are currently available, with the best results occurring with printheads in the range of 180 dpi or greater.
  • FIGS. 8 and 12 show a preferred embodiment of the alignment between a high resolution nozzle array and a lower resolution nozzle array and a preferred embodiment of the alignment between the high resolution printed dots and the lower resolution printed dots, other alignments are possible and have particular advantages.
  • FIGS. 13A, 13B, and 13C illustrate three different alignments between a one-half inch, 600 dpi black inkjet pen 110 and one or more color inkjet pens 112 when these pens 110, 112 are housed in a single carriage. Only the nozzle array faces are illustrated for simplicity.
  • FIGS. 14, 15, and 16 show three different embodiments of a printhead nozzle array face 113, 114, and 115, respectively, for such a tricolor inkjet pen having three separate ink compartments for the cyan, magenta, and yellow ink.
  • Identified in FIGS. 14-16 are the three sets of nozzles in the nozzle array face for the cyan (C), magenta (M), and yellow (Y) ink.
  • the nozzles for each of the colors may be vertically aligned as in FIG. 14, staggered as in FIG. 15, or horizontally aligned as in FIG. 16.
  • Two rows of offset nozzles 116 are provided for each color to provide a high vertical density of dots.
  • a printer incorporating a tricolor cartridge may resemble that of FIG. 1 except that cartridges 22, 24, and 26 would be a single tricolor cartridge alongside the black inkjet cartridge 28.
  • the tops of the printheads of the color pens 112 are positioned near or aligned with the top of the printhead of the black pen 112 so as to be farther from the paper outlet or output rollers.
  • the direction of paper transport is shown by arrow 124.
  • This alignment allows the color ink to be placed on the paper farther from the output rollers so that the color ink is given more time to dry before the paper is ejected by the output rollers.
  • One contrasting example of the positioning of printheads relative to the output roller of a color printer is shown in U.S. Patent No. 5,376,958, entitled STAGGERED PENS IN COLOR THERMAL INK-JET PRINTER, by Brent W.
  • FIG. 13B shows an embodiment where the bottoms of the printheads of the color ink jet pens 112 are positioned near or aligned with the bottom of the printhead of the black inkjet pen 110 so as to be nearer the paper output rollers. This allows the ink from the black pen 110 to spend less time in the printing area before the paper is ejected. This is desirable since the printer area can be at a high temperature or experience other harsh conditions.
  • the centers of the printheads of the color inkjet pens 112 are aligned near or at the center of the printhead of the black inkjet pen 110. This would generally cause the characteristics of the paper to be symmetrical with respect to the centers of the pens 110 and 112. This may result in print quality advantages by balancing the benefits obtained by the previous two alignments.
  • the alignment of pens 110 and 112 may also be off from center to variable degrees to achieve the best printing results.
  • the dimension of A in FIG. 13C may be 2 or 3 times the dimension of B or vice versa.
  • a high resolution black pen 110 has the same printhead size as the printheads of the lower resolution color pens 112. The edges of the printheads of pens 110 and 112 are aligned.
  • One drawback of the embodiment of FIG. 13D is that color printheads having the same width as the printhead of the black pen 10 may not be available.
  • FIGS. 18-22 illustrate various alignments between the high resolution dots, having diameters of about 1/600 inch, and the lower resolution dots, having diameters of about 1/300 inch. Ink bleed may cause the ink from adjacent dots to merge.
  • the dots in FIGS. 18-22 are shown separated for clarity.
  • the paper transport direction is assumed to be downward with respect to the page, and the pen scan direction is perpendicular to the paper transport direction.
  • centroid 130 of a cluster of four high resolution dots 132 is aligned with the centroid 134 of a single lower resolution dot 136.
  • One goal is to maximize the ink coverage on the page while at the same time minimizing the amount of ink put down on the page.
  • the alignment of dots in FIG. 18 comes close to, if not achieves, this goal.
  • the centroid 134 of the lower resolution dot 136 may overlap the centroid 130 of a cluster of four high resolution dots 132. Such an overlap is shown. This may be desirable for achieving particular colors or print characteristics.
  • one or more columns of the high resolution dots 132 may be printed between columns of the lower resolution dots 136.
  • a lower resolution dot 136 may be completely surrounded by higher resolution dots 132 as would be the case if a single lower resolution dot 136 were placed in the middle of the array of high resolution dots 132 shown in FIG. 18.
  • FIG. 19 illustrates another dot alignment where the lower resolution dots 136 are shifted up or down one-half of a high resolution dot 132 diameter. The overlap of a lower resolution dot 136 and four high resolution dots 132 is shown.
  • FIG. 20 illustrates another dot alignment where a centroid of a lower resolution dot 136 may be aligned with the centroid of a high resolution dot 132 or aligned between two high resolution dots 132.
  • the lower resolution dot 136 may print directly over a high resolution dot 132 or partially over a high resolution dot 132, as illustrated.
  • adjacent columns of high resolution dots 132 are staggered, and a centroid of a cluster of four high resolution dots 132 is aligned with a centroid of a lower resolution dot 136.
  • FIG. 23 a similar arrangement is shown except that the lower resolution dots 136 are shifted downward by one half of a higher resolution dot 132 diameter.
  • any combination of high resolution and lower resolution dots may directly overlap to produce various colors or shades or more intense colors.
  • the black, high resolution dots 132 may be printed during the same scan as the lower resolution dots 136 or during a different scan to reduce ink bleed and to otherwise enhance print quality.
  • the dot alignments of FIGS. 18-24, or a combination of the alignments may be used to maximize the ink coverage on a page while minimizing the amount of ink put down. Dot alignments may even be changed during printing or between print jobs as desired. The selection of a particular arrangement may depend on the expected ink bleed and ink characteristics as well as the particular image being printed.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Impact Printers (AREA)

Claims (9)

  1. Ein Mischauflösungsdrucker (10) mit folgenden Merkmalen:
    einem Rahmen zum Halten eines Mediums (18), damit in einer Druckzone auf dasselbe gedruckt wird;
    einem bewegbaren Wagen (20), der an dem Rahmen gehalten wird, um in der Nähe der Druckzone positioniert zu werden;
    einem ersten Druckkopf (110), der von dem Wagen (20) getragen wird, der Punkte (132) einer ersten Größe mit einer ersten Druckauflösung entlang einer x-Richtung und einer y-Richtung druckt, während der Wagen (20) über das Medium in der x-Richtung bewegt wird, wobei die y-Richtung senkrecht zu der x-Richtung ist; und
    einem zweiten Druckkopf (112), der von dem Wagen (20) getragen wird, der Punkte (136) einer zweiten Größe, die größer als die erste Größe ist, mit einer zweiten Druckauflösung, die niedriger als die erste Druckauflösung ist, entlang der x-Richtung und der y-Richtung druckt, während der Wagen (20) in der x-Richtung über das Medium bewegt wird,
    wobei der erste Druckkopf (110) und der zweite Druckkopf (112) die Punkte der ersten Größe und die Punkte der zweiten Größe drucken, damit sie miteinander auf dem Medium (18) auf eine vorbestimmte Art und Weise entlang der x- und der y-Richtung ausgerichtet sind, wobei der erste Druckkopf (110) mit einer schwarzen Tinte druckt, und wobei der zweite Druckkopf (112) mit einer Farbtinte druckt.
  2. Der Drucker nach Anspruch 1, bei dem die Punkte (132) der ersten Größe und die Punkte (136) der zweiten Größe ausgerichtet sind, wenn sie auf dem Medium (18) gedruckt sind, derart, daß die Schwerpunkte der Punkte (132) der ersten Größe in einer Linie von Punkten entlang der x-Richtung mit den Schwerpunkten der Punkte (136) der zweiten Größe in der x-Richtung ausgerichtet sind.
  3. Der Drucker nach Anspruch 1 oder 2, bei dem Punkte in einem Haufen von vier Punkten (132) der ersten Größe um den Schwerpunkt des Haufens in Winkeln von 45° bezüglich der x- und der y-Richtung positioniert sind.
  4. Der Drucker nach Anspruch 1 oder 2, bei dem Punkte (132) in einem Haufen von vier Punkten der ersten Größe um den Schwerpunkt des Haufens in Winkeln von 90° bezüglich der x- und der y-Richtung positioniert sind.
  5. Ein Verfahren zum Drucken unter Verwendung eines Mischauflösungsdruckers (10), mit folgenden Schritten:
    Steuern eines ersten Druckkopfs (110), um Punkte (132) einer ersten Größe mit einer ersten Druckauflösung entlang einer x-Richtung und einer y-Richtung zu drucken, während der erste Druckkopf über ein Medium (18) in der x-Richtung bewegt wird, wobei die y-Richtung senkrecht zu der x-Richtung ist; und
    Steuern eines zweiten Druckkopfs (112), um Punkte (136) einer zweiten Größe, die größer als die erste Größe ist, mit einer zweiten Druckauflösung, die niedriger als die erste Druckauflösung ist, entlang der x-Richtung und der y-Richtung zu drucken, während der erste Druckkopf (110) und der zweite Druckkopf (112) in der x-Richtung über das Medium (18) bewegt werden, wobei der erste Druckkopf (110) und der zweite Druckkopf (112) die Punkte (132) der ersten Größe und die Punkte (136) der zweiten Größe drucken, damit sie miteinander auf dem Medium (18) auf eine vorbestimmte Art und Weise entlang der x- und der y-Richtung ausgerichtet sind,
    wobei der erste Druckkopf (110) mit einer schwarzen Tinte druckt, und wobei der zweite Druckkopf (112) mit einer Farbtinte druckt.
  6. Das Verfahren nach Anspruch 5, bei dem die Punkte (132) der ersten Größe und die Punkte (136) der zweiten Größe ausgerichtet sind, wenn sie auf dem Medium (18) gedruckt werden, derart, daß die Schwerpunkte der Punkte der ersten Größe in einer Linie von Punkten entlang der x-Richtung mit den Schwerpunkten der Punkte der zweiten Größe in der x-Richtung ausgerichtet sind.
  7. Das Verfahren nach Anspruch 5 oder 6, bei dem Punkte (132) in einem Haufen von vier Punkten der ersten Größe um den Schwerpunkt des Haufens in Winkeln von 45° bezüglich der x- und der y-Richtung positioniert werden.
  8. Das Verfahren gemäß Anspruch 5 oder 6, bei dem Punkte (132) in einem Haufen von vier Punkten der ersten Größe um den Schwerpunkt des Haufens in Winkeln von 90° bezüglich der x- und der y-Richtung positioniert werden.
  9. Das Verfahren nach Anspruch 5, 6, 7 oder 8, bei dem der zweite Druckkopf (112) mit Tinte druckt, die eine Farbkomponente umfaßt, die aus einer Gruppe ausgewählt ist, die aus Cyan, Magenta und Gelb besteht.
EP19950308424 1995-03-06 1995-11-23 Punktausrichtung für Drucker mit gemischter Auflösung Expired - Lifetime EP0730969B1 (de)

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US39940295A 1995-03-06 1995-03-06
US399402 1995-03-06

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EP0730969B1 true EP0730969B1 (de) 1999-05-12

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1288762B1 (it) * 1996-10-17 1998-09-24 Olivetti Canon Ind Spa Testina di stampa a getto di inchiostro e relativo metodo di stampa ad alta definizione
US6359701B1 (en) * 1997-11-17 2002-03-19 Canon Kabushiki Kaisha Multi-head printing with differing resolutions
JP3483444B2 (ja) 1997-12-19 2004-01-06 キヤノン株式会社 プリント装置、プリントシステムおよびプリント方法
DE60220964T2 (de) * 2001-04-20 2008-03-06 Seiko Epson Corp. Drucken mit für Einfarben- und Mehrfarbengebiete unterschiedlichem Vorschub
JP4307319B2 (ja) * 2004-04-30 2009-08-05 キヤノン株式会社 記録装置及び記録方法
US7742206B2 (en) 2005-02-08 2010-06-22 Sharp Laboratories Of America, Inc. Methods and systems for color gamut adjustment
US7575293B2 (en) * 2005-05-31 2009-08-18 Xerox Corporation Dual drop printing mode using full length waveforms to achieve head drop mass differences
US8027070B2 (en) 2009-02-03 2011-09-27 Sharp Laboratories Of America, Inc. Methods and systems for hue adjustment
US8358441B2 (en) 2009-04-01 2013-01-22 Sharp Laboratories Of America, Inc. Methods and systems for sampling and modeling of colorant-limited, multi-colorant color spaces

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Publication number Priority date Publication date Assignee Title
EP0378387B1 (de) * 1989-01-11 1995-05-17 Canon Kabushiki Kaisha Tintenstrahlaufzeichnungsverfahren
US5075689A (en) * 1989-05-31 1991-12-24 Spectra, Inc. Bidirectional hot melt ink jet printing
JP2891799B2 (ja) * 1991-06-07 1999-05-17 キヤノン株式会社 インクジェット記録方法
JPH05261941A (ja) * 1992-03-18 1993-10-12 Ricoh Co Ltd インクジェット記録方法及びインクジェット記録ヘッド
US5278584A (en) 1992-04-02 1994-01-11 Hewlett-Packard Company Ink delivery system for an inkjet printhead
US5376958A (en) 1992-05-01 1994-12-27 Hewlett-Packard Company Staggered pens in color thermal ink-jet printer
JP3227284B2 (ja) * 1992-10-30 2001-11-12 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ヘッド
US5655693A (en) 1996-11-07 1997-08-12 Biometrics, Inc. Clip-on shoehorn

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EP0730969A1 (de) 1996-09-11
DE69509627T2 (de) 1999-09-02
JPH08258291A (ja) 1996-10-08
DE69509627D1 (de) 1999-06-17

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