EP2817156B1 - Verfahren zur erzeugung eines farblaserbildes zur ansicht in verschiedenen farben sowie dokument, auf dem solch ein farblaserbild dadurch hergstellt wurde - Google Patents

Verfahren zur erzeugung eines farblaserbildes zur ansicht in verschiedenen farben sowie dokument, auf dem solch ein farblaserbild dadurch hergstellt wurde Download PDF

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Publication number
EP2817156B1
EP2817156B1 EP13710478.2A EP13710478A EP2817156B1 EP 2817156 B1 EP2817156 B1 EP 2817156B1 EP 13710478 A EP13710478 A EP 13710478A EP 2817156 B1 EP2817156 B1 EP 2817156B1
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EP
European Patent Office
Prior art keywords
color laser
laser image
document
colors
image
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.)
Revoked
Application number
EP13710478.2A
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English (en)
French (fr)
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EP2817156A1 (de
Inventor
Jean-Pierre Lazzari
Jean Marc Lazzari
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Individual
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/447—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources
    • B41J2/455—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using arrays of radiation sources using laser arrays, the laser array being smaller than the medium to be recorded
    • 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
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • 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
    • 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
    • B41M5/34—Multicolour thermography
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the present invention relates to the formation of color laser images, observable in variable colors. It finds applications particularly in the personalization of identity images dedicated to official documents: identity cards, credit cards, vital cards, passports, driving licenses, secure entry badges, etc.
  • the present invention notably allows an immediate and simple control of the authenticity of the color laser image.
  • the color laser image is observed by reflection through the transparent protective layer.
  • These custom images obtained by the interaction of subpixels, and black, non-reflective surfaces, produced by laser carbonization, form the gray levels of the final personalized image.
  • this first group of references of the prior art aiming at producing color images with the aid of a laser, does not make it possible to make observable images in variable colors.
  • this second group requires a specific relief structure, complex and expensive to manufacture, this structure to be precisely aligned with the underlying reasons. Moreover, these methods do not allow the color laser image customization, with variable colors.
  • the object of the present invention is to overcome the drawbacks of the state of the art by proposing a method for forming a color laser image, observable according to variable colors, and a document on which such a color laser image is thus performed.
  • the invention proposes a matrix of colored sub-pixels, a laser-sensitive "lasérisable” layer, forming by carbonization, in relation to the sub-pixels, the gray levels of a color laser image.
  • Charred blackened volumes (forming the gray levels), hide the pixels that are opposite these volumes, when the image is observed perpendicular to its plane and also hide the adjacent pixels when the image is observed from angles of incidence, showing different colors of the customized image.
  • Laserizable material will subsequently be called any material which darkens under the effect of a laser beam.
  • the subject of the invention is a method of forming an observable color laser image in variable colors, from an assembly comprising a protective layer, pixels consisting of colored sub-pixels, a lasérisable layer, the assembly being laminated on a white reflective support.
  • the sheet of lasérisable material is then partially carbonized by the effect of a laser beam to forming non-reflective, black volumes in relation to subpixels to produce gray levels of a custom color laser image when viewed perpendicular to its plane.
  • non-reflective volumes mask the adjacent sub pixels, causing the observer to see changing colors of the customized image.
  • Laserizable materials are, by way of non-limiting examples, polycarbonates, certain polyvinyl chlorides treated, acrylonitrile-butadiene-styrenes treated, or treated polyethylene terephthalates ethylene.
  • the lasérisable material is partially carbonized by the laser to form gray levels of a personalized image.
  • the degree of darkening is made proportional to the energy deposited by the laser, thanks to linearization software, known to those skilled in the art.
  • the layer of transparent, lasable material may advantageously be between 20 ⁇ m and 500 ⁇ m thick.
  • the sensitivity to laser radiation is obtained by doping known to those skilled in the art.
  • the layer of laserizable material may be located on or beneath the subpixel matrix.
  • Sub pixels are printed by offset, inkjet, or any other technique. The sub pixels are organized in parallel columns, or in small uniformly distributed areas.
  • the assembly comprising the protection, the matrix of sub-pixels, the layer of lasérisable material, is heat-welded under pressure on the support of the document.
  • This welding operation is called “lamination” by those skilled in the art.
  • the personalization of the image object of the invention is then performed using a laser beam which carbonizes in a certain thickness the sheet of lasérisable material, with intensities or variable surfaces, above each sub pixel forming non-reflective black volumes, which show the gray levels of the final personalized image.
  • the ambient light, passing through the protective layer, the matrix of sub-pixels, the laserizable layer, comprising the gray levels, is reflected on a substantially white background of the support.
  • the personalized image appears according to its own colors, to the observer, when it is observed substantially perpendicular to its plane.
  • the ambient light passes through the protective sheet, the sub-pixels, the layer of laserizable materials, and is reflected on the substantially white background of the document support, at an angle of incidence, this which has the effect of hiding the adjacent sub pixels, showing changing colors of the custom laser color image.
  • the color laser image shows predetermined changing colors, and is separated from a color laser image with non-changing colors.
  • the invention also relates to a document comprising a laser image produced by the implementation of the method above.
  • This document comprises an assembly consisting of a protective layer, pixels formed of colored sub-pixels, a lasérisable layer, the assembly being laminated on a support.
  • the layer of laserizable material is then partially carbonized by the effect of a laser beam to form black, non-reflective volumes in relation to subpixels to produce gray levels of a custom color laser image, when observed perpendicular to its plane.
  • non-reflective volumes mask the adjacent sub pixels, causing the observer to see changing colors of the customized image.
  • the color laser image displays predetermined color changes, and is separated from a color laser image with non-variable colors.
  • the Figure 1A shows the section of a document according to the first group of the prior art.
  • the sub pixels (2) are covered by the protective layer (1).
  • the sub-pixels and the protective layer are laminated on the card body (4).
  • the black, non-reflective surfaces (3) form sub-pixels (2), the gray levels of the personalized image.
  • the Figure 1B shows the section of a document according to the second group of the prior art.
  • the surface of the document comprises structures (5) in relief, which deflect the incident light (7) or (8) which thus makes it possible to visualize different groups of patterns (6) located under the relief structures.
  • the relief structures may be inclined planes, or cylindrical lenses. The alignment of these structures (5) with respect to the patterns (6) is imperative, to produce the desired effect.
  • the figure 2 shows the section of a document according to a first embodiment of the invention.
  • sub-pixels (23), (24), (25) are printed. They are covered by the lasérisable layer (22), itself covered by the protective layer (21).
  • the lasérisable layer (22) can be obtained by surface doping of the protective layer (21), making it sensitive to laser beams.
  • the protective layer, the lasérisable layer are laminated on the document body (26).
  • a laser beam carbonizes in its thickness, the lasérisable layer, thus forming non-reflective black volumes (27), located opposite the sub pixels, to form the greyscale of the custom image.
  • the energy deposited by the laser is adjusted to produce all the shades of gray required to form a beautiful color laser image.
  • the reflected light beams (28) and (29) take the color of the sub pixels (23) and (25) respectively. If the black, non-reflective volume (27) does not fully cover the subpixel (24), then part of the color of that subpixel will be seen by the observer.
  • the figure 3 shows the section of the same document, observed under luminous incidence. It comprises the body of the document (26), the sub-pixels (23), (24), (25), the lasérisable layer (22), the protective layer (21), and the black, non-reflective volume (27) .
  • the incident light beam (30) illuminates the sub-pixel (23) is reflected on the white surface of the document, and colored out of the color of the sub-pixel (23).
  • the incident light beam (31) meets the black, non-reflecting volume (27) and is absorbed by the latter.
  • a shadow zone (33) is thus formed, which obscures the sub-pixel (25), when the document is observed according to the angle of incidence of the light beams (30) and (31).
  • the observer then sees the color of the sub-pixel (23), which differs from that of the color combination of the sub-pixels (23), and (25), the figure 2 .
  • the figure 4 shows the section of a document, according to the second embodiment of the invention.
  • the white body of the document (26) is doped on the surface, to be sensitive to laser radiation, forming a lasérisable layer (22).
  • a lasériasable layer (22) is attached to the card body (26).
  • the sub pixels (23), (24), and (25) are printed, and covered by the transparent protective layer (21).
  • the customization is done by the laser beam, which through the protective layer, and sub-pixels, forms non-reflective black volumes (27), which constitute the gray levels of the personalized image.
  • the observer looking at the document at an angle of incidence (31), and (30), hardly sees the color of the sub-pixel (23).
  • the light beam passing through it is reflected on the white surface of the body of the document (26) and is absorbed by the black, non-reflective volume (27). Only a very small portion of the light is reflected by the surface of the sub pixels (23), (24), (25).
  • the observer practically only sees the color of the sub-pixel (25) .
  • a shadow zone (33) is formed on the other side of the non-reflective black volume (27), with respect to the incident light beams, (30). ), and (31).

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Electronic Switches (AREA)
  • Credit Cards Or The Like (AREA)

Claims (6)

  1. Verfahren zur Erzeugung eines Farblaserbildes zur Ansicht in verschiedenen Farben aus einer Anordnung, umfassend eine Schutzschicht (21), Pixel, die von Farbunterpixeln (23, 24, 25) gebildet sind, und eine laserbare Schicht (22), wobei die Einheit auf einen weißen reflektierenden Träger (26) laminiert wird,
    dadurch gekennzeichnet, dass die Folie aus laserbarem Material teilweise in ihrer Dicke durch die Wirkung eines Laserstrahls karbonisiert ist, um nicht reflektierende Schwarzvolumina (27) zu bilden,
    wobei die nicht reflektierenden Schwarzvolumina gegenüber ersten Unterpixeln angeordnet sind, um die Graustufen eines personalisierten Farblaserbildes zu erzeugen, wenn es senkrecht zu seiner Ebene gesehen wird, und
    wobei die nicht reflektierenden Schwarzvolumina derart ausgebildet sind, dass sie die angrenzenden Unterpixeln der ersten Unterpixeln verdecken, wenn das personalisierte Farblaserbild unter verschiedenen Einfallswinkeln gesehen wird, um dem Beobachter changierende Farben des personalisierten Bildes zu zeigen.
  2. Verfahren zur Erzeugung eines Farblaserbildes zur Ansicht in verschiedenen Farben nach Anspruch 1, bei dem die nicht reflektierenden Schwarzvolumina über den Unterpixeln ausgebildet sind.
  3. Verfahren zur Erzeugung eines Farblaserbildes zur Ansicht in verschiedenen Farben nach Anspruch 1, bei dem die nicht reflektierenden Schwarzvolumina unter den Unterpixeln ausgebildet sind.
  4. Verfahren zur Erzeugung eines Farblaserbildes zur Ansicht in verschiedenen Farben nach den Ansprüchen 1 bis 3, bei dem die Farbvariationen vorbestimmt sind, und bei dem das in diesen verschiedenen Farben zu sehende Farblaserbild von einem Farblaserbild in nicht variablen Farben getrennt ist.
  5. Dokument, umfassend ein Farblaserbild zur Ansicht in verschiedenen Farben, das durch den Einsatz des Verfahrens nach einem der vorhergehenden Ansprüche hergestellt wird, wobei das Dokument eine Anordnung, umfassend eine Schutzschicht (21), Pixel, die von Farbunterpixeln (23, 24, 25) gebildet sind, und eine laserbare Schicht (22) umfasst, wobei die Einheit auf einen weißen reflektierenden Träger (26) laminiert wird,
    dadurch gekennzeichnet, dass die Folie aus laserbarem Material in ihrer Dicke nicht reflektierende Schwarzvolumina umfasst, die durch Teilkarbonisieren unter der Wirkung eines Laserstrahls ausgebildet sind,
    wobei die nicht reflektierenden Schwarzvolumina gegenüber ersten Unterpixeln angeordnet sind, um die Graustufen eines personalisierten Farblaserbildes zu erzeugen, wenn es senkrecht zu seiner Ebene gesehen wird, und
    wobei die nicht reflektierenden Schwarzvolumina derart ausgebildet sind, dass sie die angrenzenden Unterpixeln der ersten Unterpixeln verdecken, wenn das personalisierte Farblaserbild unter verschiedenen Einfallswinkeln gesehen wird, um dem Beobachter changierende Farben des personalisierten Bildes zu zeigen.
  6. Dokument, umfassend ein Farblaserbild zur Ansicht in verschiedenen Farben, das durch den Einsatz des Verfahrens nach den Ansprüchen 4 und 5 hergestellt wird, dadurch gekennzeichnet, dass die Farbvariationen vorbestimmt sind, und bei dem das in diesen verschiedenen Farben zu sehende Farblaserbild von einem Farblaserbild mit nicht variablen Farben getrennt ist.
EP13710478.2A 2012-02-22 2013-02-19 Verfahren zur erzeugung eines farblaserbildes zur ansicht in verschiedenen farben sowie dokument, auf dem solch ein farblaserbild dadurch hergstellt wurde Revoked EP2817156B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1200511A FR2987156B1 (fr) 2012-02-22 2012-02-22 Procede de formation d'une image laser couleur observable selon des couleurs variables, et document sur lequel une telle image laser couleur est ainsi realisee
PCT/FR2013/050333 WO2013124575A1 (fr) 2012-02-22 2013-02-19 Procede de formation d'une image laser couleur observable selon des couleurs variables, et document sur lequel une telle image laser couleur est ainsi realisee

Publications (2)

Publication Number Publication Date
EP2817156A1 EP2817156A1 (de) 2014-12-31
EP2817156B1 true EP2817156B1 (de) 2017-02-01

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EP13710478.2A Revoked EP2817156B1 (de) 2012-02-22 2013-02-19 Verfahren zur erzeugung eines farblaserbildes zur ansicht in verschiedenen farben sowie dokument, auf dem solch ein farblaserbild dadurch hergstellt wurde

Country Status (5)

Country Link
US (1) US9266350B2 (de)
EP (1) EP2817156B1 (de)
FR (1) FR2987156B1 (de)
HU (1) HUE032184T2 (de)
WO (1) WO2013124575A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2972553B1 (fr) 2011-03-10 2013-03-15 Jean Pierre Lazzari Procede de realisation d'une image laser couleur retro eclairee, document identitaire mettant en oeuvre ce procede et systeme de retro eclairage
FR3053000B1 (fr) * 2016-06-28 2019-08-16 Idemia France Dispositif personnalisable au moyen d'un laser pour produire une image couleur
US10350935B1 (en) 2018-01-10 2019-07-16 Assa Abloy Ab Secure document having image established with metal complex ink
US10821765B2 (en) 2018-01-10 2020-11-03 Assa Abloy Ab Secure documents and methods of manufacturing the same
DE102018113575A1 (de) * 2018-06-07 2019-12-12 Bundesdruckerei Gmbh Sicherheitselement mit farbiger Abbildung
DE102020210113B3 (de) 2020-08-10 2022-02-10 Bundesdruckerei Gmbh Sicherheitsdokument mit betrachtungsrichtungsabhängigem Sicherheitsmerkmal
KR20220072117A (ko) 2020-11-24 2022-06-02 삼성전자주식회사 반도체 패키지

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EP2681053A1 (de) 2011-02-28 2014-01-08 Jean-Pierre Lazzari Verfahren zur herstellung eines farbigen laserbildes mit hoher reflektivität und dokument mit auf diese weise hergestelltem farbigem laserbild
FR2972388A1 (fr) 2011-03-10 2012-09-14 Jean Pierre Lazzari Procédé de réalisation d'un substrat pour image couleur laser et document identitaire mettant en œuvre ce procédé

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Also Published As

Publication number Publication date
US20150024174A1 (en) 2015-01-22
FR2987156A1 (fr) 2013-08-23
US9266350B2 (en) 2016-02-23
FR2987156B1 (fr) 2015-01-30
HUE032184T2 (en) 2017-09-28
EP2817156A1 (de) 2014-12-31
WO2013124575A1 (fr) 2013-08-29

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