EP0300595A1 - Druckverfahren zum grafischen Ausfüllen eines Flächenstückes Punkt auf Punkt unter Verwendung einer Tintenstrahlvorrichtung - Google Patents

Druckverfahren zum grafischen Ausfüllen eines Flächenstückes Punkt auf Punkt unter Verwendung einer Tintenstrahlvorrichtung Download PDF

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Publication number
EP0300595A1
EP0300595A1 EP88304047A EP88304047A EP0300595A1 EP 0300595 A1 EP0300595 A1 EP 0300595A1 EP 88304047 A EP88304047 A EP 88304047A EP 88304047 A EP88304047 A EP 88304047A EP 0300595 A1 EP0300595 A1 EP 0300595A1
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EP
European Patent Office
Prior art keywords
row
printing
color
printhead
predetermined amount
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
EP88304047A
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English (en)
French (fr)
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EP0300595B1 (de
EP0300595B2 (de
Inventor
Donald B. Bergstedt
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.)
HP Inc
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Hewlett Packard Co
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Application filed by Hewlett Packard Co filed Critical Hewlett Packard Co
Publication of EP0300595A1 publication Critical patent/EP0300595A1/de
Publication of EP0300595B1 publication Critical patent/EP0300595B1/de
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B41M1/18—Printing one ink over another

Definitions

  • the present invention relates to ink-jet devices for printing colors on a print medium, and, more particularly, to a method of improving the perceived quality of color graphics thereon.
  • Ink-jet devices fire droplets of ink toward a print­ing medium, such as paper or mylar.
  • Typical ink-jet printheads comprise at least one group of nozzles, called a primitive, through which the droplets of ink are fired.
  • a primitive For full color printing, three primitives are employed, with the nozzles of each fluidically connected to a reser­voir of a different color ink (cyan, yellow, magenta).
  • the firing, or propelling of ink droplets may be done by piezoelectric means or by resistive heating (thermal).
  • red and blue solid area-fill the colors are generated by placing one dot of a first color on top of another dot of a second color, which produces the de­sired third color (e.g., yellow on cyan creates green).
  • the dots are put down on each other in the same pass of the printhead across the medium.
  • bands occur between swaths of print rows, due to absorption of the first color printed on the medium, which may be a special­ly coated paper used for color ink-jet printing. The banding tends to reduce the perceived quality of the out­put.
  • a method of forming dot-on-dot graphics area-fill with reduced perceived band­ing comprises overlapping a por­tion of one print row with a portion of another print row.
  • the offset printing may be done by moving either the print medium or the printhead relative to the other. Also, primitives on the printhead may be staggered to achieve the desired effect.
  • FIGS. 1a-d are top plan view of printing two colors to achieve a third color, employing a conventional print mode used in the prior art.
  • FIGS. 2a-e are top plan views of printing two colors to achieve a third color in accordance with the invention.
  • FIGS. 1a-­d depict the sequence of events in filling in an area of a third color achieved by printing multiple rows of two colors.
  • the color green is achieved by printing alternating rows of cyan and yel­low.
  • FIG. 1a illustrates the printing of a first row 10 of a first color, here, cyan, on a print medium 12.
  • the row 10, and subsequent rows are generated by firing all nozzles of a primitive on the printhead.
  • a primitive may contain ten nozzles, although fewer or greater numbers of nozzles may be employed.
  • a row 14 of a second color here, yellow, is overlaid directly over the first row 10, either in the same pass across the medium 12 or in a subsequent pass.
  • the print medium 12 is saturated with the first color, so the second color tends to run off the first color, creating the third color in the central portion 16 and a border 18 of the second color.
  • a second row 20 of the first color is printed, and its top edge is aligned substantially adja­cent the bottom edge of the first row 10 of the first color. While that portion 22 of the border 18 overlaid by the second row 20 suffers from the saturation effects discussed in connection with FIG. 1a, it nevertheless is converted to the third color. However, whereas the cen­tral portion 16 comprises the second color on top of the first color, the border portion 22 comprises the first color on top of the second color. This distinction will be discussed shortly.
  • FIG. 1d another row 24 of the second color is overlaid directly over the second row 20. Again, due to saturation of the print medium, the third color is gener­ated in the central portion 16′, and a border 18′ of the second color is formed, as in FIG. 1b.
  • printing of subsequent rows of the first color overlaid with rows of the second color generates two regions of a third color, namely a central portion 16 (and 16′, etc.) and a border portion 22 (and 22′, etc.). While both are of the same color, the former region is a third color of the case of the first color (due to the prior absorption of the first color therein), while the latter region is a third color of the cast of the second color (due to the prior absorption of the second color therein).
  • the central portions 16, 16′ are green with a bluish cast, while the border portions 22, 22′ are green with a yellowish cast.
  • the resulting area-fill comprises large swaths of one shade of green separated by narrow bands of another shade of green. The distinct banding is considered objectionable.
  • the perceived qual­ity of the area fill is improved by overlapping, or inter­leaving, swaths of the individual colors.
  • the preferred sequence of the overlapping is depicted in FIGS. 2a-e.
  • FIG. 2a shows a first row 30 of a first color, again, cyan, for example, printed on a medium 12. A complete first row is printed. Region "A" comprises the first color.
  • a second row 32 of a second color again, yellow, for example, is printed, offset from the first row by a specific, predetermined amount.
  • the portion (region "A") not printed by the second color relates to the amount of overlap, or offset, and here is one-half of a row.
  • one-half row is initially printed, and the offset is one-half row, so that the second row 32 covers the top one-half of the printed portion of the first row 30.
  • the row 32 creates the third color, again, green, for example, while the bottom half of the row 30 remains the first color.
  • Region "B” is now the third color, while that portion of region "A" not printed on is denoted "A′".
  • a third row 34 of the first color is printed adjacent the row 30, again, offset from the second row 32 by the predetermined amount, here, one half row.
  • the top of row 34 butts against the bottom of row 30.
  • Region "B”, being unaffected in this step, remains the third color
  • region "A′”, also unaffected, remains the first color
  • region "A" is the newly-printed first color.
  • a fourth row 36 of the second color is printed, offset from the third row 34 by the predetermined amount, again, one-half row.
  • Region "B” being unaffected in this step, remains the third color
  • region "A′” and the upper portion of region “A” are now the third color, as denoted by "B”
  • the lower portion of region “A” not printed on is denoted "A′", the first color.
  • the method may be continued as many times as desired printing of rows of alternating first and second colors, until the area is filled.
  • the amount of offset here, one-half of a row 38, as shown in FIG. 2e.
  • one color (the first color, here, cyan) is always overlaid by another color (the second color, here, yel­low) so that the resulting third color is always of the same cast.
  • the objectionable banding achieved with the prior art method is avoided.
  • the offsetting of one color relative to another color can be done using several methods. First, individual primitives on a single printhead containing separate col­ors can be physically offset relative to each other. Second, if the primary colors are contained in separate pens, the pens themselves can be offset relative to one another. Third, with a printhead having primitives not offset, or with a pen fixturing configuration not having the pens offset, less than the full number of nozzles in each primitive, or pen, can be used in order to allow for offsetting of the remaining nozzles.
  • the third method allows for offsetting without having to make a physical change to an existing pen or to the pen fixturing (in the case when each color is in a separate pen).
  • the two colors can be de­posited during the same pass of the printhead across the medium. In FIG. 2, this would be accomplished by deposit­ing the rows 30 and 32 represented in FIGS. 2a and 2b in the same pass, as well as the rows 34 and 36 represented in FIGS. 2c and 2d during the same pass.
  • the print medium 12 can be moved relative to the printhead.
  • the printhead can be moved relative to the print medium 12. These methods require that the medium or printhead, depending on which is being moved, move back­ward (opposite the direction of the progression of print­ing down the page) to allow for the offsetting of the second color relative to the first color. The printhead or medium must be then moved forward to deposit the first color on an unprinted section of medium again, then move backward to print the second color, and continue in this fashion until the area-fill block is complete. Thus, these methods require that one pass of the printhead across the medium be made for each primary color depos­ited.
  • the advantage of printing the first and second colors during the same pass of the printhead or printheads across the medium is that the time required to print a section of area-fill is approximately halved.
  • the print quality is better when the section is printed in two pass modes rather then in a single pass mode.
  • one section of the third color is created by combining the first and second colors in the same pass, and another section is created by depositing the second color on top of the first color which was deposited in the previous pass of the printhead across the medium. The difference creates a variation in hue between the two sections, which is no­ticeable.
  • the second color is deposited on two sections of the first color.
  • One section was de­posited in the previous pass, and the other was put down three passes prior to the pass of the second color.
  • the two sections of the first color are very similar, since both have had sufficient time to dry, and result in a uniform area of the third color.
  • the extent of offset may be varied. In the one-pass mode, maximum print quality is achieved at an offset of 100%, while slight improvement is made with slight amounts of offset of at least about 10%. In the two-pass mode, maximum print quality is achieved at an offset of 100% also, but major improvements are obtained with slight amounts of offset of at least about 10%.
  • offset partial row printing in accordance with the invention is expected to find use in color ink-­jet printers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
EP19880304047 1987-06-01 1988-05-05 Druckverfahren zum grafischen Ausfüllen eines Flächenstückes Punkt auf Punkt unter Verwendung einer Tintenstrahlvorrichtung Expired - Lifetime EP0300595B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5713087A 1987-06-01 1987-06-01
US57130 1987-06-01

Publications (3)

Publication Number Publication Date
EP0300595A1 true EP0300595A1 (de) 1989-01-25
EP0300595B1 EP0300595B1 (de) 1992-03-04
EP0300595B2 EP0300595B2 (de) 1995-08-02

Family

ID=22008689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880304047 Expired - Lifetime EP0300595B2 (de) 1987-06-01 1988-05-05 Druckverfahren zum grafischen Ausfüllen eines Flächenstückes Punkt auf Punkt unter Verwendung einer Tintenstrahlvorrichtung

Country Status (6)

Country Link
EP (1) EP0300595B2 (de)
JP (1) JP2730907B2 (de)
CA (1) CA1304980C (de)
DE (1) DE3868749D1 (de)
HK (1) HK63192A (de)
SG (1) SG64092G (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0382023A1 (de) * 1989-01-28 1990-08-16 Canon Kabushiki Kaisha Mehrfarbiges Tintenstrahlaufzeichnungsverfahren und Vorrichtung
EP0517543A3 (de) * 1991-06-07 1992-12-23 Canon Kabushiki Kaisha Farbstrahlaufzeichnungsverfahren
EP0517521A3 (en) * 1991-06-05 1992-12-30 Canon Kabushiki Kaisha Tone recording method using ink jet recording head
US5430469A (en) * 1991-06-05 1995-07-04 Canon Kabushiki Kaisha Tone recording method using ink recording head
US6406114B1 (en) 1991-06-05 2002-06-18 Canon Kabushiki Kaisha Tonal product recorded by ink and having a plurality of pixels with plural tonal levels

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247315A (en) * 1992-02-06 1993-09-21 Gerber Scientific Products, Inc. Method of printing a graphic having uniform ink density on an emulsion coated printing screen
JP5733883B2 (ja) * 2009-04-07 2015-06-10 キヤノン株式会社 インクジェット記録装置およびインクジェット記録方法
JP6432247B2 (ja) * 2014-09-26 2018-12-05 ブラザー工業株式会社 インクジェットプリンタ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3203972A1 (de) * 1981-02-06 1982-09-02 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Verfahren zum darstellen einer komplexen farbe
GB2119549A (en) * 1982-03-29 1983-11-16 Pentel Kk Multicolor printer
EP0021389B1 (de) * 1979-06-26 1986-01-29 Siemens Aktiengesellschaft Tintendruckeinrichtung zum Bedrucken eines Aufzeichnungsträgers
EP0170136A2 (de) * 1984-08-02 1986-02-05 Metromedia Company Verfahren und Vorrichtung zur Kontrolle von Farb-/Tintenstrahldruckköpfen

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58179655A (ja) * 1982-04-16 1983-10-20 Canon Inc 画像記録装置
JPS58194544A (ja) * 1982-05-11 1983-11-12 Canon Inc 記録装置
JPS58194540A (ja) * 1982-05-11 1983-11-12 Canon Inc 記録装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021389B1 (de) * 1979-06-26 1986-01-29 Siemens Aktiengesellschaft Tintendruckeinrichtung zum Bedrucken eines Aufzeichnungsträgers
DE3203972A1 (de) * 1981-02-06 1982-09-02 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Verfahren zum darstellen einer komplexen farbe
GB2119549A (en) * 1982-03-29 1983-11-16 Pentel Kk Multicolor printer
EP0170136A2 (de) * 1984-08-02 1986-02-05 Metromedia Company Verfahren und Vorrichtung zur Kontrolle von Farb-/Tintenstrahldruckköpfen

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5745135A (en) * 1989-01-28 1998-04-28 Canon Kabushiki Kaisha Ink jet recording method and color ink jet recording device for practicing the same
US6227649B1 (en) 1989-01-28 2001-05-08 Canon Kabushiki Kaisha Multimode ink jet recording device in which recording mode is selected according to recording medium
SG80067A1 (en) * 1989-01-28 2001-04-17 Canon Kk Ink jet recording method and color ink jet recording device for practicing the same
US6137505A (en) * 1989-01-28 2000-10-24 Canon Kabushiki Kaisha Ink jet recording device having staggered recording element arrays
EP0382023A1 (de) * 1989-01-28 1990-08-16 Canon Kabushiki Kaisha Mehrfarbiges Tintenstrahlaufzeichnungsverfahren und Vorrichtung
EP0665113A2 (de) * 1989-01-28 1995-08-02 Canon Kabushiki Kaisha Tintenstrahlaufzeichnungsgerät
EP0665112A2 (de) * 1989-01-28 1995-08-02 Canon Kabushiki Kaisha Tintenstrahlaufzeichnungsgerät
EP0665111A3 (de) * 1989-01-28 1996-02-21 Canon Kk Tintenstrahlaufzeichnungsgerät.
EP0665112A3 (de) * 1989-01-28 1996-03-06 Canon Kk Tintenstrahlaufzeichnungsgerät.
EP0665113A3 (de) * 1989-01-28 1996-03-06 Canon Kk Tintenstrahlaufzeichnungsgerät.
US5708463A (en) * 1989-01-28 1998-01-13 Canon Kabushiki Kaisha Ink jet recording device having monochromatic and color recording modes
US5430469A (en) * 1991-06-05 1995-07-04 Canon Kabushiki Kaisha Tone recording method using ink recording head
US5777640A (en) * 1991-06-05 1998-07-07 Canon Kabushiki Kaisha Liquid jet recording method using plural scanning nozzles and including first main scan, sub-scan, and second main-scan steps for recording pixels in tone
US5844582A (en) * 1991-06-05 1998-12-01 Canon Kabushiki Kaisha Liquid jet recording apparatus having specific relationship among number of nozzles, pitch of nozzles, movement distance maximum number of ink droplets per pixel and scan, and number of tone levels
EP0517521A3 (en) * 1991-06-05 1992-12-30 Canon Kabushiki Kaisha Tone recording method using ink jet recording head
US6260939B1 (en) * 1991-06-05 2001-07-17 Canon Kabushiki Kaisha Tone recording method using ink jet recording head that records pixels using a plurality of liquid droplets
US6406114B1 (en) 1991-06-05 2002-06-18 Canon Kabushiki Kaisha Tonal product recorded by ink and having a plurality of pixels with plural tonal levels
US5384587A (en) * 1991-06-07 1995-01-24 Canon Kabushiki Kaisha Multi-drop ink-jet recording method with compensation for image density non-uniformities
EP0517543A3 (de) * 1991-06-07 1992-12-23 Canon Kabushiki Kaisha Farbstrahlaufzeichnungsverfahren

Also Published As

Publication number Publication date
JPS63315249A (ja) 1988-12-22
DE3868749D1 (de) 1992-04-09
SG64092G (en) 1992-09-04
HK63192A (en) 1992-08-28
CA1304980C (en) 1992-07-14
EP0300595B1 (de) 1992-03-04
EP0300595B2 (de) 1995-08-02
JP2730907B2 (ja) 1998-03-25

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