EP1634710B1 - Druckverfahren für einen Thermo-Drucker - Google Patents

Druckverfahren für einen Thermo-Drucker Download PDF

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Publication number
EP1634710B1
EP1634710B1 EP20050300558 EP05300558A EP1634710B1 EP 1634710 B1 EP1634710 B1 EP 1634710B1 EP 20050300558 EP20050300558 EP 20050300558 EP 05300558 A EP05300558 A EP 05300558A EP 1634710 B1 EP1634710 B1 EP 1634710B1
Authority
EP
European Patent Office
Prior art keywords
printing
partial image
image
partial
printer
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 - Fee Related
Application number
EP20050300558
Other languages
English (en)
French (fr)
Other versions
EP1634710A1 (de
Inventor
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 Communications SAS
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 Communications SAS filed Critical Sagem Communications SAS
Publication of EP1634710A1 publication Critical patent/EP1634710A1/de
Application granted granted Critical
Publication of EP1634710B1 publication Critical patent/EP1634710B1/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315Typewriters 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
    • B41J2/32Typewriters 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
    • B41J2/35Typewriters 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 providing current or voltage to the thermal head
    • B41J2/355Control circuits for heating-element selection
    • B41J2/36Print density control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J13/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/0009Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material
    • B41J13/0027Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets control of the transport of the copy material in the printing section of automatic paper handling systems

Definitions

  • the present invention relates to a printing method for a thermal printer type printer - also called sublimation printer.
  • the object of the invention is essentially to propose a method of printing, by means of such a printer, images larger than the size of the paper used by printing said image on several sheets of paper intended to be assembled, in which, in particular, a continuous colorimetry is maintained even at junction areas of the various assembled sheets.
  • the field of the invention is, in general, that of graphic printing, which consists in reproducing on a sheet of paper an image coming from the digital world, for example captured by means of a digital camera and / or visible on a computer screen.
  • graphic printing which consists in reproducing on a sheet of paper an image coming from the digital world, for example captured by means of a digital camera and / or visible on a computer screen.
  • an essential parameter intervenes: the number of colors that an elementary point produced by a printer can adopt.
  • the solution consists in framing the images by considering macro-points, consisting of a certain number of small elementary points which can adopt one of the seven available shades of color, and to speak of a visual definition of the color whose shades are considered at the level of the macro-point, and no longer at the level of the elementary point.
  • a printing mechanism 100 of a thermal sublimation printer is schematically shown. It comprises in particular a fixed electrode bar 101 under which a printing paper 102 is scrolled, the latter being able for example to be set in motion by a drive system 103 involving small micro-toothed wheels penetrating the non-printable face 102.
  • a film 104 is initially wound on a supply reel 107 which unwinds as the printing progresses.
  • the film 104 is divided into different areas of color: each color area has a dimension identical to that of the paper to be printed.
  • Each of these zones is covered with a yellow, magenta or cyan wax, these three basic colors being cyclically alternating, preferably in this order, over the entire film 104.
  • the film 104 passes between the electrode bar 101 and the printable face of the paper 102.
  • the printing sheet 102 is pressed onto a first base color area.
  • the film 104 and the paper 102 are then driven simultaneously.
  • the electrode bar 101 raised to different temperature levels, prints the dots using this base color.
  • the amount of sublimed wax depends on the temperature of the electrode bar 101.
  • a rubber roller 106 ensures a regular pressure: while maintaining a good contact between the film 104 and the electrode bar 101, the roller 106 maintains the pressure without which the sublimation phenomenon can not occur.
  • the paper sheet 102 is then returned to the initial position, by reversing the unwinding direction of the drive system 103, and the process is repeated with the second basic color area, and then with the third basic color area. .
  • a reel 105 receiving the film 104 can store the film already used.
  • Some dye sublimation printers are dedicated to printing photographs taken with a digital camera. For this purpose, they exclusively offer a unique format of printing, for example corresponding to photos of size 10 centimeters by 15 centimeters.
  • An advantage of such a limitation is that the size of this type of printer is reduced, because of the small size of the prints they offer.
  • Such printers are improving and now offer various additional features.
  • FIG. 2 shows such an example of a "poster" 200, obtained with the prior art thermal sublimation printing processes, constituted by the juxtaposition of four sheets of paper 201, 202, 203 and 204, of size standard for a given printer, for example of 10x15 cm format.
  • a temperature change management system of the thermal head constituted by the electrode strip takes into consideration the fact that the temperature of an electrode can increase, independently of the electrical pulses transmitted to it to cause sublimation, especially during prolonged use - even slightly, the successive impressions of some photos are sufficient to observe this phenomenon - of the considered printer. It is therefore necessary to take into account this increase in temperature and compensate for it so that the same shade of color memorized actually gives a single shade of color during printing.
  • the object of the invention proposes a solution to the problems and disadvantages which have just been exposed.
  • the method according to the invention proposes a method for optimizing the production of prints larger than the standard format proposed by a thermal sublimation printer.
  • a printing method is proposed in which the printing direction of different partial images intended to be juxtaposed to form a final image can change.
  • print directions are chosen such that a junction zone between the two images does not preferentially have an area corresponding to a start of printing by the printing system. thermal sublimation.
  • the invention therefore essentially relates to a method and a printing device, according to the technical features present in the second part of claims 1 and 6.
  • the present invention also relates to a thermal sublimation printing device capable of implementing the method whose main characteristics have just been mentioned, possibly supplemented by one or more of the additional characteristics mentioned.
  • the printing device according to the invention may comprise a software application stored in a program memory for automatically detecting which partial images for which a reversal of the printing direction is necessary, and / or for making such an inversion
  • FIG. 3 shows a final image 300, of the poster type, constituted, in order to facilitate comparisons with the poster obtained by the method of the state of the art illustrated in FIG. 2, of four partial images, referenced 301, 302, 303 and 304.
  • the first partial image 301 and the second partial image 302 have retained a printing direction 305 by default; transition zones 306 of these two partial images, corresponding to the lines printed first during the passage of the sheets supporting these partial images under the thermal head, are thus maintained at a rim of the final image 300.
  • an inverted printing direction 309 is selected for the third partial image 303 and the fourth partial image 304; such an operation makes it possible to transfer transition zones 307 of these partial images also to a rim of the final image 300.
  • the poster 300 thus has a junction zone 308 that does not have a colorimetric discontinuity, the lines in this junction zone having been printed well after the temperature management system of the thermal head has come out of its transient state.
  • the inversion of the printing direction is preferably carried out for the three successive passages, corresponding to the successive applications of the three basic colors, of the paper to be printed under the thermal head.
  • Such an implementation thus makes it possible to attenuate colorimetric discontinuities of the junction zones, without however making them disappear completely. We must then provide a mechanism for turning the sheet so that the different impressions are made in the right direction.
  • the inversion of a printing direction is performed by means of a software application of a program memory of the printer; this application makes it possible, on the one hand, to automatically determine which partial images for which the direction of printing must be reversed; and secondly, reorganize the stored data for each partial image, this reorganization consisting of a simple inversion of the data for each line to print (a line initially intended to be printed first will then be last).
  • the printer allowing the implementation of the method according to the invention can, in certain exemplary embodiments, present a first memory module for storing the data relating to the final image to be obtained, and a single second memory module, by example of the same size as the first memory module, typically about 7 megabytes, which serves as temporary memory for each partial image to be printed: the data relating to each partial image to be printed are stored temporarily in the second module of memory: once they have undergone software operations to enlarge the area of the final image to which they correspond, the partial image is printed, then its data are replaced in the second memory module by the data a partial image next.
  • Such a process makes it possible on the one hand to limit the size of the memory space necessary for the production of posters or slideshows, and on the other hand, facilitates the reorganization of the data of the partial images whose printing direction must be reversed. , said data then being separately isolated in the second memory module from the other data of the final image.
  • These common lines or columns constitute redundant information that it is up to the user to remove when juxtaposing the different partial images.
  • redundant information can be spotted by dots on the partial images concerned.

Landscapes

  • Electronic Switches (AREA)
  • Record Information Processing For Printing (AREA)

Claims (6)

  1. Druckverfahren eines Endbilds (300) mit einer Größe, die größer ist als eine Standardgröße eines zu druckenden Papierblatts, das in dem Drucker verwendet werden kann, wobei das Verfahren die folgenden verschiedenen Etappen aufweist:
    - Drucken einer Einheit von Teilbildern (301; 302; 303; 304) auf eine Einheit von Papierblättern, die in dem Drucker verwendet werden können, wobei zumindest ein erstes Teilbild (301), das eine am Ende gedruckte erste Seite in eine Standarddruckrichtung (305) betrachtet mit mindestens einer Passage unter einem Thermokopf des Papierblatts, das das erste Teilbild trägt, aufweist, wobei die erste Seite dazu bestimmt ist, zumindest teilweise mit einer zweiten Seite mindestens eines zweiten Teilbilds (303) nebeneinander gelegt zu werden zu sein;
    - Nebeneinanderlegen in einer zuvor bestimmten Reihenfolge der Teilbilder, um das Endbild zu bilden;
    dadurch gekennzeichnet, dass das Verfahren mittels eines Thermosublimationsdrucker (100) umgesetzt wird und einen zusätzlichen Schritt aufweist, der darin besteht, eine entgegen gesetzte Druckrichtung (309) zu der Standarddruckrichtung zu verwenden, um zumindest das zweite Teilbild zu drucken.
  2. Verfahren nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass der Schritt des Einsatzes einer der Standarddruckrichtung entgegen gesetzten Druckrichtung zum Drucken des zweiten Teilbilds den Schritt umfasst, der darin besteht, eine Dateneinheit in Zusammenhang mit dem zweiten Teilbild, die in einem Speichermodul des Druckers gespeichert ist, umzukehren, so dass eine zu druckende Zeilenreihenfolge, die in einem Gebrauch der Standarddruckrichtung vorgesehen ist, umgekehrt wird.
  3. Verfahren nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eine Seite jedes Teilbilds, die dazu bestimmt ist, mit einer anderen Seite eines anderen Teilbilds nebeneinander gelegt zu werden, eine redundante Information aufweist.
  4. Verfahren nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es den zusätzlichen Schritt aufweist, der darin besteht, auf mindestens eines der Teilbilder eine Kennzeichnung zu drucken, um eine zu schneidende Zone des Teilbilds zu kennzeichnen, die vor dem Schritt des Nebeneinanderlegens der Teilbilder in Betracht gezogen wird.
  5. Verfahren nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass es einen zusätzlichen Schritt aufweist, der darin besteht, vor dem Drucken eines Teilbilds:
    - eine ersten Dateneinheit in Zusammenhang mit dem Endbild in einem ersten Speichermodul des Druckers zu speichern,
    - aus dem ersten Speichermodul eine zweite Dateneinheit in Zusammenhang mit dem betreffenden Teilbild zu extrahieren, wobei die zweite Dateneinheit in einem zweiten Speichermodul des Druckers gespeichert wird;
    dann:
    - das betreffende Teilbild zu drucken,
    - aus dem ersten Speichermodul eine nächste Dateneinheit in Zusammenhang mit einem nächsten Teilbild zu extrahieren, wobei die nächste Dateneinheit in dem zweiten Speichermodul des Druckers gespeichert wird,
    - das betreffende nächste Teilbild zu drucken.
  6. Thermosublimationsdruckvorrichtung, die das Verfahren nach mindestens einem der vorhergehenden Ansprüche umsetzen kann, um ein Endbild (300) mit einer Größe zu drucken, die größer ist als eine Standardgröße eines zu bedruckenden Papierblatts, das es in der Druckvorrichtung verwendet werden kann, dadurch gekennzeichnet, dass die Druckvorrichtung insbesondere umfasst:
    - einen Thermokopf (101), der auf verschiedene Temperaturniveaus angehoben wird, um eine Einheit von Teilbildern (301; 302; 303; 304) auf eine Einheit von Papierblättern zu drucken, die in der Druckvorrichtung verwendet werden können, wobei zumindest ein erstes Teilbild (301), das eine am Ende gedruckte erste Seite in die Standarddruckrichtung (305) betrachtet mit mindestens einer Passage unter der Thermokopf des Papierblatts aufweist, das das erste Teilbild trägt, wobei die erste Seite dazu bestimmt ist, zumindest teilweise mit einer zweiten Seite mindestens eines zweiten Teilbilds (303) nebeneinander gelegt zu werden,
    - eine Softwareanwendung, die in einem Programmspeicher der Druckvorrichtung gespeichert ist, um eine Umkehrung der Druckrichtung auszuführen und daher eine entgegen gesetzte Druckrichtung (309) zu der Standarddruckrichtung zu verwenden, um zumindest das zweite Teilbild zu drucken.
EP20050300558 2004-09-13 2005-07-05 Druckverfahren für einen Thermo-Drucker Expired - Fee Related EP1634710B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0452021A FR2875170B1 (fr) 2004-09-13 2004-09-13 Procede d'impression au moyen d'une imprimante thermique

Publications (2)

Publication Number Publication Date
EP1634710A1 EP1634710A1 (de) 2006-03-15
EP1634710B1 true EP1634710B1 (de) 2007-05-30

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ID=34950664

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Application Number Title Priority Date Filing Date
EP20050300558 Expired - Fee Related EP1634710B1 (de) 2004-09-13 2005-07-05 Druckverfahren für einen Thermo-Drucker

Country Status (4)

Country Link
EP (1) EP1634710B1 (de)
DE (1) DE602005001244T2 (de)
ES (1) ES2284145T3 (de)
FR (1) FR2875170B1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3756302B2 (ja) 1997-10-30 2006-03-15 三菱電機株式会社 画像印画装置
JP2000246965A (ja) * 1999-03-02 2000-09-12 Matsushita Electric Ind Co Ltd プリンタコントロール装置
US20020118374A1 (en) 2001-02-26 2002-08-29 Wanko Mark J. Computer readable media having a poster/puzzle
US20030055871A1 (en) 2001-07-31 2003-03-20 Javier Roses Document/poster composition and printing
US6567628B1 (en) * 2001-11-07 2003-05-20 Hewlett-Packard Development Company L.P. Methods and apparatus to determine page orientation for post imaging finishing

Also Published As

Publication number Publication date
EP1634710A1 (de) 2006-03-15
DE602005001244T2 (de) 2008-01-24
ES2284145T3 (es) 2007-11-01
FR2875170B1 (fr) 2006-11-24
FR2875170A1 (fr) 2006-03-17
DE602005001244D1 (de) 2007-07-12

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