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EP3875284B1 - Procédé et dispositif de personnalisation d'une ébauche de document à l'aide d'un graphique - Google Patents

Procédé et dispositif de personnalisation d'une ébauche de document à l'aide d'un graphique Download PDF

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Publication number
EP3875284B1
EP3875284B1 EP21154723.7A EP21154723A EP3875284B1 EP 3875284 B1 EP3875284 B1 EP 3875284B1 EP 21154723 A EP21154723 A EP 21154723A EP 3875284 B1 EP3875284 B1 EP 3875284B1
Authority
EP
European Patent Office
Prior art keywords
graphic
brightness
document
photosensitive layer
energy
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.)
Active
Application number
EP21154723.7A
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German (de)
English (en)
Other versions
EP3875284A1 (fr
Inventor
Thomas Kramer
Werner Richter
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.)
Bundesdruckerei GmbH
Original Assignee
Bundesdruckerei GmbH
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Publication date
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Publication of EP3875284A1 publication Critical patent/EP3875284A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/305—Associated digital information
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/309—Photographs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/41—Marking using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/267—Marking of plastic artifacts, e.g. with laser

Definitions

  • the invention relates to a method for personalizing a document blank with a graphic for producing a document by means of an irradiation device and a device for personalizing a document blank.
  • a graphic such as a portrait of the document owner can be applied to the document.
  • a Laser engraving has proven to be an effective method for printing graphics onto a document.
  • Color pigments are created in the document blank by bombarding a photosensitive material with laser light. This causes a material transformation in the photosensitive material, allowing individual image points to be created at the point of impact of the laser.
  • a graphic can first be rasterized, and then the individual pixels of the graphic are transferred to the document using individual laser pulses.
  • a polycarbonate layer or polyvinyl chloride can be applied to the documents, for example, to which an additive consisting essentially of carbon chains has been added. If this layer is now bombarded with a laser pulse, individual molecular chains can break up and carbon can be released. This manifests itself in the layer blackening in the region hit by the laser pulse. In general, the gray level produced depends on the pulse energy.
  • graphics are applied to a document line by line or column by column using laser engraving. This can result in large variations in brightness between neighboring pixels within a line or column. For a laser that generates the pixels, this means that the pulse energy emitted must vary greatly from pixel to pixel. With inexpensive fiber lasers, for example, this can lead to the contours of the generated graphics becoming blurred, as the laser system cannot keep up with the rapid jumps in the required pulse energy when engraving a line.
  • Known solutions to this problem include using expensive solid-state laser systems or high-loss fiber laser systems with downstream Q-switches that can provide rapidly changing pulse energy, or slowing down the imaging process so that there is enough time to correctly adjust the laser system to the required pulse energy. While the first solution means a significant increase in the cost of a laser engraving device, The second solution causes a significant increase in imaging time.
  • a "document” can be a valuable or security document.
  • a document is understood to mean paper-based and/or plastic-based documents, such as identification documents, in particular passports, identity cards, VISAs and driving licenses, vehicle registration documents, vehicle registration documents, company IDs, health cards or other ID documents as well as chip cards, means of payment, in particular banknotes, bank cards and credit cards, waybills or other proof of authorization.
  • a data storage device for storing at least one attribute can be integrated into these.
  • a "document” is understood here to mean in particular a portable electronic device which has at least one data storage device for storing an attribute and a communication interface for reading the attribute.
  • the document has a secure storage area for Storage of at least one attribute to prevent the attribute stored in the memory area from being changed in an unauthorized manner or read without the necessary authorization.
  • the invention relates to a method for personalizing a document blank with a graphic for producing a document using an irradiation device.
  • the document blank has a photosensitive layer which is designed such that when the photosensitive layer is exposed to electromagnetic radiation, at least one optically detectable parameter of the photosensitive layer changes.
  • This can, for example, be a blackening or lightening of the photosensitive layer when exposed to laser light.
  • the change in the parameter for example the lightening or blackening, scales with the energy introduced into the photosensitive layer by the electromagnetic radiation.
  • the electromagnetic radiation is provided by an irradiation device, whereby the intensity of the radiation provided by the irradiation device is adjustable.
  • the irradiation intensity can be adjusted continuously or in fixed steps.
  • a monochrome output graphic is provided.
  • the output graphic can be, for example, a portrait of the future document holder, or a logo or another identification feature.
  • the term "monochrome" in this case can mean that the monochrome output graphic only has gray values or different brightness values of a defined color.
  • an output graphic can also consist of a large number of brightness values of a shade of blue.
  • An information content of one byte can be assigned to a single pixel, which corresponds to 255 different brightness values.
  • the brightness values of the monochrome output graphic are reduced to at least two brightness levels.
  • this process is known as grayscale reduction.
  • a uniform brightness value is assigned to all brightness values within a defined interval.
  • the result of this process step is a reduced output graphic that only contains pixels whose brightness value corresponds to one of the uniform brightness values of the brightness levels.
  • this reduced initial graphic is divided into subgraphics, with each subgraphic only containing pixels of the same brightness. If, for example, five brightness levels were selected in the previous step, you will get five subgraphics.
  • each partial graphic is then each reproduced in their entirety on the document blank by exposing the photosensitive layer of the document blank to electromagnetic radiation.
  • Each brightness level is assigned an energy to be introduced into the photosensitive layer by the electromagnetic radiation. Since each partial graphic only contains pixels of the same brightness, i.e. pixels of a single brightness level, when a partial graphic is reproduced, the photosensitive layer of the document blank is only exposed to the energy to be introduced assigned to the brightness level of the partial graphic.
  • the method described above could have the advantage that the output power of the irradiation device does not have to be changed during the application of a single partial graphic. This eliminates the waiting times that are usually necessary when changing the energy of the electromagnetic radiation emitted by the irradiation device.
  • irradiation devices that react very slowly to a necessary change in the emitted energy can also be used to implement the method according to the invention, since such a change only once, namely only before starting to image a partial graphic. The entire partial graphic can then be applied to the document blank using one and the same setting of the irradiation device.
  • the method according to the invention could prevent a smearing effect from occurring when the brightness level jumps from one pixel to an adjacent pixel due to the irradiation device reacting too slowly to a necessary change in the output power.
  • a sharper image could therefore be produced by using the method according to the invention using a cost-effective irradiation device.
  • a partial graphic does not necessarily have to be all the pixels of a brightness level that are present in the entire reduced output graphic.
  • a partial graphic can, for example, also consist of all the pixels of a brightness level in a line of the reduced output graphic.
  • the irradiation device runs through an image line several times in succession when displaying the partial graphics, whereby only pixels of a partial graphic, i.e. of a brightness level, are applied during one run through the image line.
  • the irradiation device can be a laser source.
  • the laser source is preferably configured so that it can emit laser pulses of defined energy.
  • a laser pulse can be a light pulse with a pulse energy of between 0.01 mJ and 1 mJ and a pulse width of about 3 ns to 250 ns. Such a pulse has peak powers of about 10 kW to 50 kW.
  • the wavelength of the light emitted must be adapted to the requirements of the photosensitive layer. Wavelengths in the near infrared, around 1064 nm, are common in laser engraving processes.
  • each pixel of an applied graphic can then be generated by exposing the photosensitive layer to a laser pulse of defined energy.
  • a single laser pulse would be needed to produce a pixel of the first brightness level, while for a pixel of the third brightness level, three laser pulses would be needed to produce a pixel of the desired brightness level.
  • the output power of the laser can remain constant for each pulse, regardless of the brightness level to be produced.
  • the laser source can be a fiber laser, which consists, for example, of a pulse source and a downstream fiber amplifier.
  • a fiber laser which consists, for example, of a pulse source and a downstream fiber amplifier.
  • MOPA Master Oscillator Power Amplifier
  • the pump power with which the fiber amplifier is pumped can be kept constant during the complete imaging of a partial graphic.
  • all that is needed is to cause the pulse source to emit a single laser pulse. This is then amplified to the power level defined by the constant pump power and generates a pixel of defined brightness when it hits the photosensitive layer.
  • the at least two brightness levels of the reduced output graphic are individually defined for each graphic to be applied or are chosen to be the same for each graphic.
  • the decision as to whether the brightness levels are adapted to the graphic to be applied or whether they are kept constant across a large number of graphics depends on the graphics to be applied. For example, if it is a graphic in which the different brightness values of the individual pixels are evenly distributed over the entire spectrum of possible brightness values, the brightness levels can be chosen so that the number of pixels of the applied graphic is evenly distributed across the brightness level. For example, if it is a graphic with 1000 pixels and four brightness levels were chosen, in this embodiment the limits of the brightness levels would be chosen so that 250 pixels fall into each brightness level.
  • the brightness levels can also be chosen so that each brightness level contains the same number of brightness values.
  • a pixel can, for example, assume 255 different brightness values (1 byte). If one were to define four brightness levels following this embodiment, these would have to be selected in such a way that each brightness level contains 64 or 63 brightness values.
  • the two aforementioned options for defining brightness levels would be particularly suitable if a number of brightness levels is to be maintained for several graphics. This could reduce the process time for generating a graphic, as the brightness levels do not have to be defined individually for each graphic.
  • the brightness values of the pixels of a graphic are not evenly distributed across all available brightness values, but that there are, for example, clusters of certain brightness values of the individual pixels.
  • a clustering method can then be applied to this brightness spectrum in order to determine clusters in the brightness spectrum.
  • the brightness levels used later can then be adapted to these determined clusters of brightness values, for example by centering the interval of brightness values assigned to a brightness level around a cluster and choosing the brightness value assigned to the brightness level according to the maximum of the cluster.
  • the choice of the boundaries of a brightness level and the choice of the brightness value assigned to the brightness level can also be adapted in another way to the shape of the clusters of the pixels. This could be necessary, for example, if clusters do not follow a symmetrical distribution (Gaussian distribution), but are highly asymmetrical.
  • the reduced initial graphic can be prepared by dithering and/or posterization before being divided into partial graphics.
  • edges of the graphic that have occurred between the partial images of the brightness levels due to the reduction to at least two brightness levels carried out beforehand can be smoothed out, so that the image quality is improved compared to the original on which the graphic is based.
  • the applied graphic is the negative of the underlying original graphic.
  • a photosensitive layer can be used for this, which becomes lighter rather than darker when exposed to electromagnetic radiation.
  • a further embodiment provides that those areas of the photosensitive layer that lie outside the edges of the applied graphic are exposed to electromagnetic radiation so that they bleach. This can prevent subsequent changes being made to these edge areas.
  • a positive of the graphic in addition to the negative of the graphic, can also be applied to the document blank. This could further increase the security of the document against forgery, since it can be checked at any time whether the negative matches the positive shown or whether discrepancies can be identified between the two graphics.
  • the document blank has a multi-layer document body, where the layers can be plastic and/or paper and/or metal and/or polymer layers.
  • the document blank has a chip with a memory area and an interface in one of the layers, where the interface enables access to the memory area of the chip.
  • the original graphic applied to the document can be stored in this memory area of the chip as part of the method, where, for example, when the document is checked, the stored original graphic can be read out via the interface. In this way, the security of the document against forgery can be further increased, since when the authenticity of the document is checked, the negative, the positive and the original of the graphic can be compared with one another.
  • the storage means include an assignment of the brightness levels to an energy to be introduced into the photosensitive layer.
  • the processor means access the storage means in order to determine the energy to be introduced associated with the brightness level of a partial graphic and then to control the control device of the irradiation device in such a way that the photosensitive layer is exposed to the energy to be introduced associated with the brightness level, wherein the document blank has a chip with a storage area and an interface, wherein the interface has access to the memory area of the chip, the method further comprising storing the output graphic in the memory area of the chip.
  • the device further includes a feeding device and a stacking device, wherein the feeding device includes a plurality of document blanks and is designed to feed the document blanks to the irradiation device for exposure to electromagnetic radiation, and wherein the stacking device is designed to receive personalized document blanks.
  • the stacking device is further designed to receive faulty documents separately from the personalized document blanks.
  • the Fig.1 shows a block diagram of a device 100 for personalizing a document blank 102 with a graphic.
  • the device 100 essentially consists of an irradiation device 104 and a conveyor device 106.
  • the irradiation device 104 contains a laser source 108, the laser source 108 being operatively connected to a laser control 110.
  • the irradiation device 104 also contains processor means 112 as well as storage means 114 and an interface 116.
  • the laser control 110 further contains a program module 118 which contains machine-readable code, by the execution of which the laser control 110 controls the laser source 108.
  • the laser source 108 is connected to a processing head 122 via coupling means, such as a fiber coupling 120.
  • the processing head 122 is designed to decouple the laser radiation generated by the laser source 108 and fed to the processing head 122 via the fiber coupling 120, so that a targeted beam 124 can be emitted onto the card blank 102.
  • the alignment of the beam 124 can be achieved, for example, by an arrangement of deflection mirrors, the alignment of which is controlled by piezoelectric or electroactuator elements.
  • the light deflection system used in the processing head 122 can be a galvanometer scanner.
  • the document blank 102 can also be moved relative to the processing head 122.
  • the processor means 112, the storage means 114 and the interface 116 do not necessarily have to be part of the irradiation device 104. It is also possible to separate these elements as long as they are operatively connected to the irradiation device 104.
  • the processor means 112, the storage means 114 and the interface 116 can be part of a separate computer system which is connected to the irradiation device by cable or wirelessly.
  • the initial graphic is first read in via the interface 116.
  • the initial graphic can be either a monochrome initial graphic or an initially polychrome initial graphic, which is subsequently monochromatized.
  • a monochrome initial graphic or an initially polychrome initial graphic, which is subsequently monochromatized.
  • FIG. 2a Such an output graphic 202 is shown as an example.
  • the output graphic 202 read in via the interface 116 is first stored in the storage means 114.
  • the output graphic 202 is then prepared by the processor means 212 by executing a corresponding program so that it can be applied to the card blank 102. For this purpose, at least two brightness levels of the monochrome output graphic 202 are first defined.
  • all pixels of the output graphic 202 are then assigned to one of the brightness levels based on their brightness value and all pixels of a brightness level are assigned a fixed new brightness value.
  • this process is known as grayscale reduction.
  • the result of this process is a graphic in which only pixels of a defined number of brightness values are present.
  • An example is shown in Fig. 2b a grayscale reduced graphic 204 is shown.
  • the graphic 204 was further subjected to image enhancement after the grayscale reduction was carried out by dithering.
  • the grayscale reduced graphic 204 is divided in a subsequent process step by the processor 112 into partial graphics, which are Fig. 2c are shown as examples.
  • Each of the partial graphics 206, 208, 210 and 212 only contains pixels of one and the same brightness level.
  • partial graphic 206 only contains pixels with a very light shade of gray
  • partial graphic 208 only contains pixels with a medium shade of gray
  • partial graphic 210 only contains pixels with a dark shade of gray
  • partial graphic 212 only contains pixels that are black. Not shown here is the partial graphic that only contains white pixels.
  • the partial graphics 206, 208, 210 and 212 thus generated are then stored in the memory 114.
  • the partial graphics 206, 208, 210 and 212 are transferred one after the other to the card blank 102 by the laser control 110 controlling the laser source 108 accordingly.
  • the laser control 110 controlling the laser source 108 accordingly.
  • the processing head 122 then aligns the beam 124 one after the other to the positions of the pixels to be generated on the card blank 102, and a laser pulse is emitted onto the targeted pixel on the card blank 102 by controlling the laser source 108 via the fiber coupling 120 and the processing head 122. This generates a pixel of the desired gray level at the point where the laser pulse hits the photosensitive layer. This is done one after the other for all pixels of the partial graphic to be imaged. Only when the partial graphic has been completely imaged on the card blank 102 is the next partial graphic loaded and imaged analogously on the card blank. Since the next partial graphic is a graphic with a different gray level, the laser source's output power is first adjusted to the gray level to be achieved for the pixels to be generated.
  • the output power of the laser must be increased accordingly.
  • the reduced graphic 204 can be transferred to the card blank 102 in this way.
  • the document produced can be removed from the processing area by the conveyor device 106.
  • a new document blank 102 can then be positioned under the processing head 122 of the irradiation device 100 by the conveyor device 106 so that the personalization process can be run through again.
  • the conveyor device 106 can feed the documents that have already been processed to a stacking device (not shown).
  • the conveyor device 106 can be designed such that, in the event of an incorrect imaging of the original graphic, it feeds the processed document blank 102 to a different storage location than those document blanks 102 on which the imaging of the original graphic was carried out correctly.
  • FIG. 3a Two possible brightness spectra of a graphic to be displayed are shown as examples.
  • a brightness spectrum 302 of a graphic is shown in which the number of pixels that have a certain brightness value is evenly distributed over all brightness values.
  • the brightness values of the individual pixels are shown on the x-axis, while the number of pixels per brightness value is shown on the y-axis. Since this is an exemplary representation, further axis labeling has been omitted.
  • brightness levels In order to Fig. 3a In order to transfer the underlying graphic to a document blank within the scope of the method according to the invention, brightness levels must first be defined. As already explained, this can be done, for example, by dividing the brightness spectrum into equally sized sub-areas.
  • each pixel whose brightness value falls within one of the intervals is assigned the brightness value associated with the corresponding interval.
  • all pixels whose brightness value lies in interval A are assigned the brightness value H1
  • all pixels whose brightness value lies in interval C are assigned the brightness value H3:
  • the choice of the brightness values H1, H2, H3 and H4 can be adjusted so that an optimized contrast of the generated image results.
  • the brightness value H1 of the interval A can be selected to be centered within the interval A.
  • the number of pixels is distributed very inhomogeneously across the different brightness values.
  • Fig. 3b the brightness spectrum 304 in Fig. 3b the spectrum of a three-coloured flag.
  • Fig. 3b it may be useful to choose the intervals E, F, and G so that each of the intervals contains one of the cluster areas, which are represented by the strong increase in the number of pixels per brightness value.
  • the individual intervals differ greatly in their width and that the brightness value assigned to an interval is not centered within the interval.
  • the choice of intervals underlying the brightness levels can always be adapted to the underlying source graphic in such a way that the contrast and image quality of the graphic generated on the document blank is optimized.
  • the Fig.4 shows a block diagram of a document 400 generated by the method according to the invention.
  • the document 400 contains a negative 402 and a positive 404 of an initial graphic to be applied to the document.
  • the graphic can be the portrait of the document owner.
  • the document 400 also contains a chip 406 with a storage area 408 and an interface 410. Via the interface 410, for example, the image underlying the positive 404 and the negative 402 can be stored in the storage area 408 of the chip 406 or read from it.
  • the negative 402 can be compared with the positive 404 and the original graphic stored in the storage area 408.
  • the following are examples of a process for personalizing a document blank.

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  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Credit Cards Or The Like (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Electronic Switches (AREA)
  • Laser Beam Printer (AREA)

Claims (15)

  1. Procédé de personnalisation d'une ébauche de document (102) munie d'un graphisme pour la production d'un document au moyen d'un dispositif d'irradiation, dans lequel l'ébauche de document (102) présente une couche photosensible, dans lequel, lors de la soumission à un rayonnement électromagnétique, au moins un paramètre détectable de manière optique de la couche photosensible se modifie, dans lequel la modification du paramètre est rendue proportionnelle à l'énergie apportée dans la couche photosensible, dans lequel le dispositif d'irradiation fournit un rayonnement électromagnétique, dans lequel l'énergie du rayonnement fourni par le dispositif d'irradiation est réglable, avec les étapes suivantes :
    • la fourniture d'un graphisme de départ monochrome (202),
    • la réduction des valeurs de luminosité du graphisme de départ monochrome (202) jusqu'à au moins deux échelons de luminosité afin d'obtenir un graphisme de départ réduit (204),
    • la subdivision du graphisme de départ réduit (204) en graphismes partiels (206, 208, 210, 212), où chacun des graphismes partiels ne présente que des points d'image de même luminosité,
    • respectivement, la représentation totale des graphismes partiels (206, 208, 210, 212) individuels sur l'ébauche de document (102) par la soumission de la couche photosensible au rayonnement électromagnétique,
    dans lequel une énergie à apporter dans la couche photosensible est associée à chaque échelon de luminosité (H1, H2, H3, ...) et dans lequel la couche photosensible est soumise à l'énergie à apporter associée à l'échelon de luminosité (H1, H2, H3, ...) du graphisme partiel (206, 208, 210, 212) lors de la représentation d'un graphisme partiel (206, 208, 210, 212),
    dans lequel l'ébauche de document (102) présente une puce (406) munie d'une zone de mémoire (408), ainsi qu'une interface (410), dans lequel l'interface (410) permet un accès à la zone de mémoire (408) de la puce (406), où le procédé contient en outre l'enregistrement du graphisme de départ (202) dans la zone de mémoire (408) de la puce (406).
  2. Procédé selon la revendication 1, dans lequel, dans le cas du dispositif d'irradiation, il s'agit d'une source laser, dans lequel la source laser fournit des impulsions laser d'énergie définie,
    dans lequel éventuellement :
    - chaque point d'image du graphisme appliqué est créé par la soumission de la couche photosensible à une impulsion laser d'énergie définie, et/ou
    - dans le cas de la source laser, il s'agit d'un laser de type fibre et dans lequel la puissance de pompage, avec laquelle le laser de type fibre est pompé, reste constante pendant la représentation totale d'un graphisme partiel.
  3. Procédé selon l'une des revendications précédentes, dans lequel les au moins deux échelons de luminosité du graphisme de départ monochrome réduit sont définis pour chaque graphisme appliqué de manière individuelle et dans lequel les au moins deux échelons de luminosité du graphisme de départ monochrome sont identiques pour chaque graphisme.
  4. Procédé selon l'une des revendications précédentes, dans lequel les échelons de luminosité sont choisis de telle manière que le nombre de points d'image du graphisme appliqué sont distribués régulièrement sur les échelons de luminosité.
  5. Procédé selon l'une des revendications précédentes 1 à 3, dans lequel les échelons de luminosité sont choisis de telle manière que chaque échelon de luminosité renferme le même nombre de valeurs de luminosités.
  6. Procédé selon l'une des revendications précédentes 1 à 3, dans lequel le choix des échelons de luminosité contient :
    • la détermination d'un spectre de luminosité, où le spectre de luminosité représente le nombre de points d'images présents dans le graphisme de départ par valeur de luminosité,
    • l'emploi d'un procédé de regroupement afin de déterminer des accumulations dans le spectre de luminosité,
    • la répartition des échelons de luminosité de sorte que chaque échelon de luminosité comprenne une accumulation.
  7. Procédé selon l'une des revendications précédentes, dans lequel, avant la subdivision du graphisme de départ réduit en graphismes partiels, le graphisme de départ réduit est traité par tramage et/ou par postérisation.
  8. Procédé selon l'une des revendications précédentes, dans lequel, dans le cas du graphisme appliqué, il s'agit d'un négatif du graphisme de départ.
  9. Procédé selon la revendication 8, dans lequel la couche photosensible s'étend sur une surface de l'ébauche de document plus importante que le graphisme appliqué, où le procédé contient en outre la soumission de zones de la couche photosensible, lesquelles se situent en dehors des bords du graphisme appliqué, au rayonnement électromagnétique.
  10. Procédé selon l'une des revendications précédentes, dans lequel la modification de paramètres détectables de manière optique de la couche photosensible n'est pas proportionnelle de manière linéaire avec l'énergie apportée.
  11. Procédé selon l'une des revendications précédentes 8 à 10, dans lequel, outre le négatif du graphisme, également un positif du graphisme est appliqué sur l'ébauche de document.
  12. Procédé selon l'une des revendications précédentes, dans lequel l'ébauche de document présente un corps de document à plusieurs couches, dans lequel, dans le cas des couches, il s'agit de couches en matière plastique, et/ou en papier, et/ou en métal, et/ou en polymère.
  13. Dispositif (100) de personnalisation d'une ébauche de document (102) munie d'un graphisme pour la production d'un document au moyen d'un dispositif d'irradiation (104) permettant la fourniture d'un rayonnement électromagnétique, avec un dispositif de commande pour le dispositif d'irradiation (104), dans lequel l'intensité du rayonnement fourni par le dispositif d'irradiation (104) est réglable par le dispositif de commande, dans lequel le dispositif d'irradiation est conçu pour la soumission d'une ébauche de document (102) munie d'une couche photosensible à un rayonnement électromagnétique, dans lequel, lors de la soumission au rayonnement électromagnétique, au moins un paramètre détectable de manière optique de la couche photosensible se modifie, dans lequel la modification du paramètre est rendue proportionnelle à l'énergie apportée dans la couche photosensible, où le dispositif (100) comprend en outre un dispositif de traitement de données avec des moyens processeurs (112), des moyens mémoires (114) et une interface (116), dans lequel l'interface (116) est conçue pour lire un graphisme de départ monochrome (202), dans lequel les moyens processeurs (112) sont conçus pour :
    • la réduction des valeurs de luminosité du graphisme de départ monochrome (202) jusqu'à au moins deux échelons de luminosité afin d'obtenir un graphisme de départ réduit (204),
    • la subdivision du graphisme de départ réduit (204) en graphismes partiels (206, 208, 210, 212), où chacun des graphismes partiels (206, 208, 210, 212) ne présente que des points d'image de même luminosité,
    • la commande du dispositif de commande du dispositif d'irradiation de telle manière que les graphismes partiels (206, 208, 210, 212) individuels sont respectivement représentés totalement sur l'ébauche de document (102) par la soumission de la couche photosensible au rayonnement électromagnétique par le dispositif d'irradiation,
    dans lequel les moyens mémoires (114) contiennent une association des échelons de luminosité (H1, H2, H3, ...) à une énergie à apporter dans la couche photosensible, et dans lequel, avant la représentation d'un graphisme partiel (206, 208, 210, 212) , les moyens processeurs déterminent l'énergie à apporter associée à l'échelon de luminosité (H1,H2, H3, ...) du graphisme partiel (206, 208, 210, 212) par un accès aux moyens mémoires (114) et pour la commande du dispositif de commande du dispositif d'irradiation de telle manière que la couche photosensible soit soumise à l'énergie à apporter associée à l'échelon de luminosité (H1, H2, H3, ...),
    dans lequel l'ébauche de document (102) présente une puce (406) munie d'une zone de mémoire (408), ainsi qu'une interface (410), dans lequel l'interface (410) permet un accès à la zone de mémoire ((408) de la puce (406), dans lequel les moyens processeurs sont en outre conçus pour enregistrer le graphisme de départ (204) dans la zone de mémoire de la puce (406).
  14. Dispositif selon la revendication 13, muni d'un dispositif d'approvisionnement et d'un dispositif d'empilement, dans lequel le dispositif d'approvisionnement contient une multiplicité d'ébauches de documents et est conçu pour amener les ébauches de documents du dispositif d'irradiation à être soumises au rayonnement électromagnétique et dans lequel le dispositif d'empilement est conçu pour réceptionner les ébauches de documents personnalisées.
  15. Dispositif selon la revendication 14, dans lequel le dispositif d'empilement est conçu en outre pour réceptionner des documents défectueux de manière séparée par rapport aux ébauches de documents personnalisées.
EP21154723.7A 2014-06-16 2015-04-28 Procédé et dispositif de personnalisation d'une ébauche de document à l'aide d'un graphique Active EP3875284B1 (fr)

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DE102014211513.2A DE102014211513B4 (de) 2014-06-16 2014-06-16 Verfahren und Vorrichtung zur Personalisierung eines Dokumentenrohlings mit einer Grafik
EP15722106.0A EP3154793B1 (fr) 2014-06-16 2015-04-28 Procédé et dispositif de personnalisation d'une ébauche de document comprenant un graphisme
PCT/EP2015/059194 WO2015193013A1 (fr) 2014-06-16 2015-04-28 Procédé et dispositif de personnalisation d'une ébauche de document comprenant un graphisme

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WO2003088144A2 (fr) * 2002-04-09 2003-10-23 Digimarc Id Systems, Llc Techniques de traitement d'images pour imprimer des cartes et des documents d'identification
DE102005032997A1 (de) 2005-07-14 2007-01-18 Giesecke & Devrient Gmbh Gitterbild und Verfahren zu seiner Herstellung
DE102006029797A1 (de) * 2005-07-28 2007-02-08 Mühlbauer Ag Personalisierungsverfahren zur Erzeugung eines Bildes auf einem Kunststoffsubstrat und personalisiertes Sicherheitsdokument
EP2100747B1 (fr) * 2008-03-10 2015-02-25 Maurer Electronics Gmbh Procédé destiné à l'application d'une image dotée d'une information supplémentaire incorporée sur un support de données
US8354611B2 (en) 2008-10-29 2013-01-15 Coherent, Inc. Laser engraving apparatus
EP2181858A1 (fr) * 2008-11-04 2010-05-05 Agfa-Gevaert N.V. Document de sécurité et son procédé de production
EP2322355B1 (fr) 2009-11-13 2015-02-11 Polska Wytwornia Papierow Wartosciowych S.A. Procédé de fabrication d'une image latente sur un substrat de document et substrat de document comportant une image latente
DE102010053604A1 (de) * 2010-12-06 2012-06-06 Bundesdruckerei Gmbh Modulare Laserindividualisierungsvorrichtung und Laserindividualisierungssystem

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EP3715142A1 (fr) 2020-09-30
WO2015193013A1 (fr) 2015-12-23
CN106457876B (zh) 2018-06-01
EP3715142B1 (fr) 2021-12-01
EP3875284A1 (fr) 2021-09-08
DE102014211513B4 (de) 2018-11-22
EP3154793A1 (fr) 2017-04-19
EP3154793B1 (fr) 2021-02-24
CN106457876A (zh) 2017-02-22
EP3875283A1 (fr) 2021-09-08
EP3715141A1 (fr) 2020-09-30
EP3875283B1 (fr) 2024-07-17
DE102014211513A1 (de) 2015-12-17
EP3715141B1 (fr) 2021-12-01

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