EP1547791A2 - Thermosublimationsdruckverfahren von Multiformatmedium - Google Patents

Thermosublimationsdruckverfahren von Multiformatmedium Download PDF

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Publication number
EP1547791A2
EP1547791A2 EP20040300928 EP04300928A EP1547791A2 EP 1547791 A2 EP1547791 A2 EP 1547791A2 EP 20040300928 EP20040300928 EP 20040300928 EP 04300928 A EP04300928 A EP 04300928A EP 1547791 A2 EP1547791 A2 EP 1547791A2
Authority
EP
European Patent Office
Prior art keywords
color
printing
zone
pass
paper
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.)
Withdrawn
Application number
EP20040300928
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English (en)
French (fr)
Inventor
Frédéric Berthault
Bruno Bauprey
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.)
Sagemcom Broadband SAS
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of EP1547791A2 publication Critical patent/EP1547791A2/de
Withdrawn legal-status Critical Current

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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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/325—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads by selective transfer of ink from ink carrier, e.g. from ink ribbon or sheet

Definitions

  • the invention relates to a sublimation printing process of a multiformat support.
  • This process uses a technology of thermal sublimation for printing, in several printing passes, a support that can have different formats.
  • the invention finds applications in the general field of printing on a medium such as paper.
  • the invention applies to the printing of digital photographs on glossy paper from a thermal dye sublimation printer.
  • a recent technique consists of to print digital photographs on glossy paper. This technique allows a user to obtain his photographs on paper, with a quality close to the photographs obtained with a conventional silver process.
  • printer thermal sublimation technology This technique can be implemented with a printer thermal sublimation technology.
  • printer manufacturers have made sublimation printers thermal devices that can be connected to any computer staff.
  • any user who has made digital photographs can print his photographs, on a specific paper, from his computer connected to a dye sublimation printer.
  • Dye sublimation printing technology consists of generate the colors of the photograph (called more simply photo) by successive diffusion of the three primary colors, namely the yellow, the magenta and cyan. For this, these colors are fixed, in the form of a wax, on a specific paper, called ribbon of colors. This ribbon colors is transparent, covered with yellow, magenta and cyan waxes. These three primary colors form a series of predefined sequences invariable: first yellow, then magenta and finally cyan. Each color sequence has a specific dimension that corresponds to the length or width of the paper to be printed, depending on whether the printing is in the direction of the length of the photo or in the without of the width.
  • the ribbon of colors consists of three sequences (yellow, magenta and cyan) of dimensions 10 x 15, placed one after the other.
  • the printable paper scrolls on the entire length of the color ribbon and a heated head ensures the ribbon heating with a greater or less intensity depending on the different areas of the photo, this intensity being a function of the density of color that we want to have on the photo.
  • a fourth sequence placed after the cyan sequence has a layer of a protective material (called in Anglo-Saxon terms coating) used to cover the entire picture, after in order to protect it against the ultraviolet rays of light, splashing water and other elements that could damage the picture.
  • a protective material called in Anglo-Saxon terms coating
  • This technique has the advantage that it can be used in a personal capacity by the user who can print his digital photos himself.
  • this method has the disadvantage that the sequences of colors have well-defined dimensions that induce paper size. As a result, if the color ribbon has color sequences of 10 x 15 cm, then the photos can only be printed in one format 10 x 15 cm.
  • the invention proposes a process for printing, by the technique of thermal sublimation, papers of different sizes with color ribbons standard.
  • the invention proposes to print the paper in two passes, or more, the first pass consisting of printing a first part of paper with an overlap area and the second pass consisting of print the second part of the paper with the same overlap area. You can print a paper of a size larger than the size of color sequences.
  • the recovery zone comprises a first yellow overlap zone, a second overlap zone of the magenta and a third cyan overlap, the first zone next to the second part of the support, .the third zone adjacent to the first part of the support and the second zone being between the first and the third areas.
  • each color is printed in the overlap area with a decreasing intensity during the first pass and with a gradual intensity during the second pass.
  • first pass we print a first part of the paper as well as a recovery zone.
  • second pass we print the second part of the paper and the same area of overlap. This overlap area is located in the middle of the paper, between the first part P1 of the paper and the second part P2 of the paper.
  • the middle of the paper is the the middle of the length of the paper if it is printed in the direction of length or the middle of the paper width if it is printed in the sense of width.
  • This overlap zone extends over the entire width paper if it is printed lengthwise or over the whole length of paper if it is printed in the width direction.
  • paper can be printed in length or in width, the choice being made according to in particular, the format chosen for the paper and the format of the colors. In the rest of the description, we will consider the case where the printing of the paper is done in length.
  • each rectangle represents schematically the paper to be printed, at a stage of his impression.
  • Each printing step is thus represented by a rectangle, the first step being shown at the bottom of the figure.
  • the fully printed paper according to the method of the invention is shown in top of the figure.
  • the paper is divided into three parts: a first part P1, a second part P2 and a covering area A.
  • the recovery zone R is divided into three zones a, b and c of size identical.
  • the first zone, called zone a is the recovery zone of the yellow color. This zone a is located at the limit of the second part P2 paper.
  • the third zone, called zone c is the zone of cyan color recovery. This area c is located at the edge of the first part P1 of the paper. In other words, zone c is adjacent to the P1 part of the paper and the area adjoins the second part P2 of the paper.
  • the second zone, called area b is the area of coverage of the magenta color. This zone b is located between zone a and zone c.
  • the paper has a first part P1 printed at the time of the first printing pass, then an area covering c, covering area b, covering area a and a second portion P2 printed during the second printing pass.
  • the lowest rectangle shows the first step of the first printing pass.
  • the impression of the yellow color on the part P1 and the zones b and c are represented in speckles.
  • the zone has overlap is printed in yellow with a decreasing intensity (i.e. gradually decreasing) represented in more distant speckles.
  • the second part P2 of the paper is white because not printed.
  • the magenta color is applied, represented by a hatched from right to left, on the first part P1 of the paper and the recovery zone c.
  • the hatching on the zone b overlap are more spaced to represent the decreasing intensity magenta on the recovery zone b.
  • the area has recovery and the Part P2 does not have magenta printing.
  • the cyan color is applied, represented by a hatched from left to right, on the first part P1 of the paper.
  • the hatching on the recovery zone c is more spaced to represent the degressive intensity of cyan on area b of recovery. Areas a and b overlap and part P2 does not have no cyan print.
  • the fourth step of the first pass is to cover the first part P1, totally printed, with a protective layer represented by zigzag lines.
  • This protective layer must not no case cover the area of color recovery because it prevent the printing of colors in this area during the second printing pass.
  • the yellow color is applied, represented by speckles, on the second part P2 of the paper and on the area a.
  • speckled areas of the recovery zone have the same spacing as those of parts P1 and P2 to schematize a same intensity of yellow.
  • the impression of the yellow on the zone has, during the first printing pass, added to the yellow print on the same zone a, during the second printing pass, provides the same intensity printing in this area was that if the paper had been printed into a only pass.
  • the first part P1 is totally printed and protected.
  • the areas b and c of recovery are in the same state as in the third stage the first printing pass.
  • the magenta color is applied, represented by hatching from right to left, on the second part P2 of the paper and on zones a and b.
  • the hatching of zone b of overlap have the same spacing as those of parts P1 and P2 for schematize the same intensity of the magenta.
  • the impression of magenta on zone b, during the first printing pass, added to the printing of the magenta on the same area b, during the second print pass, provides the same print intensity in this area b as if the paper had been printed in one pass.
  • the recovery zone c is in the same only at the third step of the first print pass.
  • the cyan color is applied, represented by hatching from left to right, on the second part P2 of the paper and on zones a, b and c.
  • the hatching of zone c of overlap have the same spacing as those of parts P1 and P2 for schematize the same intensity of cyan.
  • the impression of cyan on the area c, during the first printing pass, added to the cyan print on the same area c, during the second printing pass, provides the same intensity of printing in this area c that if the paper had been printed in one pass.
  • the yellow, magenta and cyan colors are printed with a progressive intensity, ie a gradual increase in the intensity, respectively, in zones a, b and c.
  • a progressive intensity ie a gradual increase in the intensity, respectively, in zones a, b and c.
  • the final intensity of these colors in zones a, b and c, after the first and the second printing pass, is the same as that which would have been obtained if printing was done in one printing pass.
  • the paper is totally printed, on the parts P1, P2 and on the covering area R.
  • the fourth step of the second pass is to cover part P2 and the covering area R of a layer of protective material, schematized by zigzag lines.
  • the protective layer, in this second printing pass, is placed on the edge of the first layer of protection deposited during the first printing pass.
  • the process as it is described is carried out with a printer classic and a standard color ribbon.
  • the paper is inserted into the printer and undergoes a first pass impression, as described above, with a first series of color sequences.
  • the paper is then moved and it undergoes the second print pass, with a second series of color sequences.
  • the recovery zones a, b and c are intended to avoid the creation of a break line, which would exist if the print of each color stopped neatly, across the entire width paper.
  • This break line would be, on the one hand, a spatial break in the makes it difficult to start a second printing pass exactly where the first pass ends and; on the other hand, a breaking of the intensity of the color. Indeed, as and when printing of a paper, the temperature inside the printer increases. Must therefore less to less energy to achieve the same intensity. A thermal compensation then makes it possible to obtain homogeneity between the beginning and the end of the printing. Without a recovery zone of colors, intermediate between the first and the second part of paper, the rupture zone would be visible at the boundary between the first part of the paper and the second part of the paper. The R area of color overlap therefore avoids this line of rupture and ensure smoothing of imperfections.
  • the recovery zone is advantageously divided into as many areas as there are colors to to print.
  • the recovery zone is therefore divided into three zones, each of these three areas ensuring the recovery of a color.
  • Recovery each zone is made according to the same series of color sequences than the sequences imposed during the first printing pass. If the area covering the three colors was performed at the same place, so that would require six heat-up passes all over the recovery. There would be a high risk of over-sublimation.
  • you print the yellow color and print over the magenta color then some of the yellow color diffused can go up in the magenta color ribbon, which has the effect of reducing the intensity yellow in the overlap area. There is then over-sublimation. Indeed, there is no additive property of the recovery.
  • each zone a, b, c of recovery does not undergo a print with each color printing pass.
  • the area has a single impression on the first print pass; she. then undergoes three impressions during the second printing pass. So, as each zone a, b, c of the overlap zone, zone a does not undergo than four impressions, ie four heating steps, which reduces the risk of over-sublimation.
  • the method of the invention makes it possible to respect the initial sequencing of colors, ie yellow, magenta and cyan, essential criterion for obtaining good color reproduction and therefore a good quality of printing. It is noted in fact that, in the invention, a color is applied only when the previous color is definitely printed. For example, magenta is printed only when the yellow has been permanently printed.
  • the intensity of color printing does not have an additivity property. Also, to get a color of a intensity of 50%, it is not possible to make a first pass at 25% and a second goes to 25%. Indeed, apply twice 25% intensity one color does not achieve the same result once 50% intensity of this same color. Also, to correct this effect of no additivity, the invention proposes a corrective function allowing compensate for this phenomenon.
  • This correction function consists of a correspondence table that gives the percentage of intensity to be applied to each pass to obtain the desired total intensity. This table of correspondence is obtained by means of a calibration carried out, ie for each color, or in a general way for the set of colors.
  • a table is made correspondence by color.
  • Each correspondence table is calibrated, taking into account the characteristics of the paper, Color ribbon and machine, in terms of color diffusion in the paper.
  • This calibration can be achieved by printing a value of 100% and looking at the behavior of the print for different percentages, between 1 and 100%.
  • This calibration can be done for a defined number of levels, for example between 10 and 20, all the others levels being deduced by interpolation.
  • the intensity of each color is degressive or progressive in zones a, b and c of recovery.
  • the modulation of each color in these areas can be different from a variation of intensity.
  • the modulation of each color can be achieved by spatial distribution variable.
  • the number of heating points in these areas instead of changing the intensity gradually (in increase or decrease) at each print pass, you can change the number of heating points in these areas.
  • the number of heating points can be halved in zone a of recovery of the yellow, during the first printing pass, and the three quarter of the number of heating points, during the second pass printing.
  • the spatial distribution to be applied is given, as for the intensity, by a correspondence table.
  • the variation of the spatial distribution is combined with the variation of the intensity of the colors, in each zone a, b, c of recovery. This combination allows to obtain a larger flexibility and a wider range of possible recoveries.
  • the separation between the different areas of recovery are not necessarily linear, as shown in the single figure. This separation can be carried out according to a random pattern.
  • the method of the invention has the advantage of making it possible to print format papers different using the same standard color ribbon.
  • a ribbon of colors whose color sequences allow you to print a paper size 10 x 15 cm can be used, with the method of the invention, to make panoramic photos of a size of about 18 x 15 cm or 10 x 28 cm, which is twice the standard subtract the width of the overlap area which can be, for example, of the order of 2 cm.
  • the method of the invention also makes it possible to produce photos of even larger dimensions by making more than two passes successive.
  • a panoramic image can be printed, with the method of the invention, in a format of the order of 10 ⁇ 41, which corresponds to three print passes in the length direction of the paper.
  • the invention also allows, using color ribbons have color sequences smaller than the standard format, combine two, three or more color sequences to get a photo of a chosen format.
  • the method of the invention to remove the constraint, present until now, on the size of color sequences of the ribbon that dictates the size of the paper.

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  • Electronic Switches (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
EP20040300928 2003-12-23 2004-12-21 Thermosublimationsdruckverfahren von Multiformatmedium Withdrawn EP1547791A2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0351178 2003-12-23
FR0351178A FR2863935B1 (fr) 2003-12-23 2003-12-23 Procede d'impression par sublimation thermique d'un support multiformat

Publications (1)

Publication Number Publication Date
EP1547791A2 true EP1547791A2 (de) 2005-06-29

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EP20040300928 Withdrawn EP1547791A2 (de) 2003-12-23 2004-12-21 Thermosublimationsdruckverfahren von Multiformatmedium

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FR (1) FR2863935B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4815872A (en) * 1984-08-20 1989-03-28 Kabushiki Kaisha Toshiba Method, apparatus and thermal print ribbon to provide a protective layer over thermally-printed areas on a record medium
JPS63122595A (ja) * 1986-11-12 1988-05-26 Fujitsu Ltd 熱転写印字方法
JP2608330B2 (ja) * 1989-07-14 1997-05-07 キヤノン株式会社 隣接領域との境界部分の印刷方法
US5140341A (en) * 1991-06-17 1992-08-18 Eastman Kodak Company Method and apparatus for thermally printing large images with small dye-donor patches
JPH06262807A (ja) * 1993-03-12 1994-09-20 Alps Electric Co Ltd カラー記録装置
JP3078678B2 (ja) * 1993-03-22 2000-08-21 富士写真フイルム株式会社 カラー熱記録方法
JP2001030531A (ja) * 1999-07-26 2001-02-06 Alps Electric Co Ltd 版下フィルムの印刷方法および版下印刷用プリンタ

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FR2863935B1 (fr) 2007-01-19
FR2863935A1 (fr) 2005-06-24

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