EP0730969A1 - Alignement de points pour imprimante à résolution mixte - Google Patents

Alignement de points pour imprimante à résolution mixte Download PDF

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Publication number
EP0730969A1
EP0730969A1 EP95308424A EP95308424A EP0730969A1 EP 0730969 A1 EP0730969 A1 EP 0730969A1 EP 95308424 A EP95308424 A EP 95308424A EP 95308424 A EP95308424 A EP 95308424A EP 0730969 A1 EP0730969 A1 EP 0730969A1
Authority
EP
European Patent Office
Prior art keywords
dots
printhead
size
color
resolution
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.)
Granted
Application number
EP95308424A
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German (de)
English (en)
Other versions
EP0730969B1 (fr
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
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Publication of EP0730969A1 publication Critical patent/EP0730969A1/fr
Application granted granted Critical
Publication of EP0730969B1 publication Critical patent/EP0730969B1/fr
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

  • 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 U.S. Patent No. 5,278,584, 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.
  • 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 spring assembly including a backing sheet 74, a plate 76 and a gimbal spring 78 are sized for fitting into apertures 80 of flex-circuit frame 82 to assure proper electrical interconnection for the three color cartridges.
  • 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.
  • FIG. 17 illustrates the nozzle arrays of three separate color pens 118, 119 and 120 when installed in the carriage 50 of FIG. 4.
  • Pen 118 may be a cyan pen
  • pen 119 may be a magenta pen
  • pen 120 may be a yellow pen, as also illustrated in FIG. 2, but the order of pens is not very significant to this invention.
  • 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.
  • the high resolution nozzle array has a one-half inch swath and 300 nozzles (150x2 offset columns), and the ink drop volume for each nozzle is approximately 35 picoliters.
  • the ink reservoir for this high resolution pen contains approximately 42 millimeters of black ink. Color ink may also be used.
  • the ink drop volume for each nozzle is approximately 30 picoliters per drop.
  • An ink reservoir for each of the three colors in the tricolor pen may contain approximately 19.1 milliliters of ink.
  • Each color is in fluid communication with 64 nozzles in a single printhead.
  • each individual color pen 118, 119, or 120 illustrated in FIG. 17 the ink drop volume for each nozzle is approximately 104 picoliters, and the ink reservoir holds approximately 42 milliliters of ink.
  • Each printhead contains approximately 104 nozzles at a dpi of 300.
  • the alignment between the individual dots printed by the black pen 110 and the color pen or pens 112 may also be selected to provide the desired print characteristics.
  • 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.
  • FIGS. 18-20 four high resolution dots 132 are placed around their centroid 130 at 45° from the x and y axis lines.
  • Four high resolution dots 132 may also be placed along the 90° axis lines, as shown in FIG. 21.
  • Such an arrangement of high resolution dots 132 may be created by either modifying the arrangement of nozzles in the nozzle array of an inkjet pen (or tilting the pen) to produce the dot arrangement of FIG. 21 in a single swath or by modifying the energization speed of the inkjet firing resistors in combination with reducing the incremental steps of the paper.
  • the mixed resolution dot alignments of FIG. 21 present certain advantages in graphics applications.
  • a cluster of lower resolution dots 136 may either have the diamond pattern of FIG. 21 or the square pattern of FIGS. 18-20.
  • mixed dot resolutions are also contemplated, such as 3 to 1 resolutions or 4 to 1 resolutions, producing either a nine dot cluster or a sixteen dot cluster for every single lower resolution dot.
  • FIGS. 22-24 illustrate other alignments of high and lower resolution dots.
  • 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)
EP19950308424 1995-03-06 1995-11-23 Alignement de points pour imprimante à résolution mixte Expired - Lifetime EP0730969B1 (fr)

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

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836946A2 (fr) * 1996-10-17 1998-04-22 OLIVETTI-CANON INDUSTRIALE S.p.A. Tête d'impression à jet d'encre pour l'impression à haute définition et méthode de sa mise en oeuvre
EP0925924A3 (fr) * 1997-12-19 2000-01-12 Canon Kabushiki Kaisha Tête d'impression, dispositif d'impression et procédé d'impression
EP1251009A1 (fr) * 2001-04-20 2002-10-23 Seiko Epson Corporation Impression avec avancement différent pour régions monochromes et régions en couleur
CN1693090B (zh) * 2004-04-30 2010-05-12 佳能株式会社 记录装置和记录方法
US7742206B2 (en) 2005-02-08 2010-06-22 Sharp Laboratories Of America, Inc. Methods and systems for color gamut adjustment
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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6359701B1 (en) * 1997-11-17 2002-03-19 Canon Kabushiki Kaisha Multi-head printing with differing resolutions
US7575293B2 (en) * 2005-05-31 2009-08-18 Xerox Corporation Dual drop printing mode using full length waveforms to achieve head drop mass differences

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0378387A2 (fr) * 1989-01-11 1990-07-18 Canon Kabushiki Kaisha Méthode d'enregistrement par jet d'encre
WO1991008902A1 (fr) * 1989-12-15 1991-06-27 Spectra, Inc. Impression a jet d'encre de thermofusion bidirectionnelle
EP0517543A2 (fr) * 1991-06-07 1992-12-09 Canon Kabushiki Kaisha Méthode d'enregistrement par jet d'encre
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
EP0595651A2 (fr) * 1992-10-30 1994-05-04 Canon Kabushiki Kaisha Système pour l'enregistrement par jet d'encre
US5376958A (en) 1992-05-01 1994-12-27 Hewlett-Packard Company Staggered pens in color thermal ink-jet printer
US5655693A (en) 1996-11-07 1997-08-12 Biometrics, Inc. Clip-on shoehorn

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EP0378387A2 (fr) * 1989-01-11 1990-07-18 Canon Kabushiki Kaisha Méthode d'enregistrement par jet d'encre
WO1991008902A1 (fr) * 1989-12-15 1991-06-27 Spectra, Inc. Impression a jet d'encre de thermofusion bidirectionnelle
EP0517543A2 (fr) * 1991-06-07 1992-12-09 Canon Kabushiki Kaisha Méthode d'enregistrement par jet d'encre
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
EP0595651A2 (fr) * 1992-10-30 1994-05-04 Canon Kabushiki Kaisha Système pour l'enregistrement par jet d'encre
US5655693A (en) 1996-11-07 1997-08-12 Biometrics, Inc. Clip-on shoehorn

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836946A2 (fr) * 1996-10-17 1998-04-22 OLIVETTI-CANON INDUSTRIALE S.p.A. Tête d'impression à jet d'encre pour l'impression à haute définition et méthode de sa mise en oeuvre
EP0836946A3 (fr) * 1996-10-17 1999-09-15 Olivetti Lexikon S.p.A. Tête d'impression à jet d'encre pour l'impression à haute définition et méthode de sa mise en oeuvre
EP0925924A3 (fr) * 1997-12-19 2000-01-12 Canon Kabushiki Kaisha Tête d'impression, dispositif d'impression et procédé d'impression
US6582041B1 (en) 1997-12-19 2003-06-24 Canon Kabushiki Kaisha Printing head, printing apparatus and printing method
EP1251009A1 (fr) * 2001-04-20 2002-10-23 Seiko Epson Corporation Impression avec avancement différent pour régions monochromes et régions en couleur
US6682169B2 (en) 2001-04-20 2004-01-27 Seiko Epson Corporation Printing by switching sub-scan feeding between monochromatic area and color area
CN1693090B (zh) * 2004-04-30 2010-05-12 佳能株式会社 记录装置和记录方法
US7742206B2 (en) 2005-02-08 2010-06-22 Sharp Laboratories Of America, Inc. Methods and systems for color gamut adjustment
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 Publication date
EP0730969B1 (fr) 1999-05-12
DE69509627T2 (de) 1999-09-02
DE69509627D1 (de) 1999-06-17
JPH08258291A (ja) 1996-10-08

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