EP4375083A1 - Sicherheitsdokument mit einer perforierten metallschicht neben mindestens einem teil einer seite einer farbigen subpixelmatrix und herstellungsverfahren dafür - Google Patents

Sicherheitsdokument mit einer perforierten metallschicht neben mindestens einem teil einer seite einer farbigen subpixelmatrix und herstellungsverfahren dafür Download PDF

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Publication number
EP4375083A1
EP4375083A1 EP23200582.7A EP23200582A EP4375083A1 EP 4375083 A1 EP4375083 A1 EP 4375083A1 EP 23200582 A EP23200582 A EP 23200582A EP 4375083 A1 EP4375083 A1 EP 4375083A1
Authority
EP
European Patent Office
Prior art keywords
document
pixels
sub
metal layer
window
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.)
Pending
Application number
EP23200582.7A
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English (en)
French (fr)
Inventor
Marie MAZZOLINI
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.)
Idemia France SAS
Original Assignee
Idemia France 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 Idemia France SAS filed Critical Idemia France SAS
Publication of EP4375083A1 publication Critical patent/EP4375083A1/de
Pending legal-status Critical Current

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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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/346—Perforations
    • 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
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • 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
    • B42D25/43—Marking by removal of material
    • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. 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
    • B41M5/24—Ablative recording, e.g. by burning marks; Spark recording

Definitions

  • the invention relates to the field of security documents, and in particular security documents on or within which images can be observed.
  • the invention applies non-exclusively to physical identity documents, such as a passport, an identity card, a driving license, a residence permit, etc.
  • identity documents also known as identity documents or security documents.
  • This market concerns very diverse documents, such as identity cards, passports, access badges, driving licenses, etc., which can be presented in different formats (cards, booklets, etc.).
  • Security documents must be authenticated easily and quickly. They must also be difficult to counterfeit (if possible unfalsifiable), in the face of the latest counterfeiting techniques.
  • Security documents typically feature colorful images, for example photographs of the faces of a security document bearer.
  • Colored imaging techniques for secure identity documents use arrays of colored subpixels (e.g. with Red-Green-Blue subpixels or Cyan-Magenta-Yellow subpixels) and techniques for blackening a layer which will mask portions of sub-pixels to obtain pixels of a desired color.
  • colored subpixels e.g. with Red-Green-Blue subpixels or Cyan-Magenta-Yellow subpixels
  • a laserizable layer may be a transparent polycarbonate layer and may include additives sensitive to passage of a laser beam because this beam causes them to carbonize.
  • Such a laserizable layer will be blackened or at least partially grayed throughout its thickness depending on the power of the laser since the additives sensitive to the passage of a laser beam are distributed uniformly throughout the thickness of the layer.
  • the present invention proposes a security document comprising a stack of layers comprising a matrix of colored subpixels (SB, SM, SJ), a metallic layer adjacent to at least part of one face of the matrix of colored sub-pixels, in which the metal layer has perforations facing sub-pixels of the matrix of colored sub-pixels, in which an image displayed in at least a first window of said document located facing at least one area not comprising said metallic layer, is reproduced at least partially in a second window of said document, said second window being located opposite an area comprising said metallic layer.
  • SB matrix of colored subpixels
  • SJ matrix of colored subpixels
  • the invention proposes to use a metal layer which is perforated to reveal certain colored sub-pixels. It is thus possible to form pixels of the image with colored sub-pixels under or on which a metallic layer is deposited and colored sub-pixels under or on which the metallic layer is perforated, which makes it possible to have a gamut of expanded color, and especially brighter colors.
  • said metal layer comprising perforations is located only in a first window of said document. In this way, it is possible to make only one part of the image brighter. This advantageously makes it possible not to modify the color rendering outside of the window, compared to a usual rendering of the document, which is important when said document is a security document.
  • said metal layer is positioned above the matrix of colored subpixels.
  • said metal layer is positioned below the matrix of colored subpixels.
  • the metal layer is positioned above the pixel array in one or more document windows and below the pixel array in one or more document windows.
  • the image displayed in said window comprises at least part of an image displayed on a second window of said document, said second window being located on an area of said document not including said perforated metal layer.
  • the image represented in the window can be the face of the document holder and it is particularly advantageous to print the face in a window whose color gamut is widened so as to better distinguish the details.
  • displaying an image with a wider gamut makes it more difficult to falsify the document as this image includes more details.
  • information other than the face for example personal identification information of the holder of the document, such as his marital status or information relating to the document, such as a registration number. .
  • said metal layer is previously partially demetallized so as to adhere to the layer(s) in which it is inserted.
  • said perforated metal layer is perforated so that the image displayed in said first window presents a different visual rendering depending on whether said document is illuminated from the front side or from the rear side.
  • the invention also relates to a method of manufacturing a security document in which a matrix of colored sub-pixels is assembled with a metal layer, adjacent to at least part of one face of the matrix of colored sub-pixels, the method further comprising the formation of perforations through said metal layer facing sub-pixels of the matrix of colored sub-pixels in which an image displayed at least partially is reproduced in at least a first window of said document located facing at least one zone not comprising said metallic layer, in a second window of said document, said second window being located opposite a zone comprising said metallic layer.
  • security documents comprising both a matrix of colored sub-pixels and a metallic layer, with a color gamut improved at least in terms of brightness on at least part of the security document.
  • the images formed by these subpixels are customizable images, which may be different for each document, and which may be specific to each document user.
  • the documents described here may be physical identity documents such as a passport, an identity card, a driving license, a residence permit, etc.
  • the documents described here may be associated with a user, and the colored images that will be obtained may be images of the users' faces.
  • a window F includes information whose brightness and contrast are different from the brightness and contrast of the other areas of the document D.
  • the contrast and brightness of the information present in window F are improved for a human eye.
  • the window F includes information visible from both sides of the document D. This can be made possible by the presence of transparent layers above and below the window F. According to certain embodiments, the visual rendering of this information is different depending on whether we observe the document from its front side or its rear side.
  • the window F may include information not present on other parts of the document F.
  • the window F can include or include part of the information present on the document D.
  • this window F can also include part of the information present on the document D in a modified manner, for example with a rotation. or on a different scale.
  • This information can be for example the face of the bearer of document D, or personal data, such as his marital status, for example his date of birth, his place of birth, distinctive physical signs, etc.
  • several windows F may be present on the document D. These windows may include different information in each window (or in one or more windows) or the same information in each window (or in one or more windows). showing different contrast or brightness in multiple windows.
  • THE figures 2 to 5 illustrate embodiments in which sectional views of the document D illustrate how a different visual rendering is obtained in the window(s) F.
  • Documents 100 or 100' may be a representation of document D of the figure 1 .
  • the document 100 or 100' particularly comprises a matrix of colored sub-pixels 101, for example a transparent or opaque layer on which colored elements have been printed which each form colored sub-pixels.
  • the matrix of colored sub-pixels includes sub-pixels having three possible colors, cyan sub-pixels SB, magenta sub-pixels SM, and yellow sub-pixels SJ.
  • CMY Cyan Magenta Yellow
  • the invention is not limited to this color model and can also use a model such as the RGB model (“Red Green Blue” in English, i.e. Red, Green, Blue). Of course, we can use other color triplets which differ from CMY and RGB.
  • the subpixels are arranged according to a matrix which will be described in more detail with reference to the Figure 6 or to the figure 7 .
  • a PM pattern of three sub-pixels SB, SM, and SJ is repeated several times in the section visible on the figures 2a to 5d .
  • the documents 100 and 100' also optionally include a transparent layer 103, for example made of polycarbonate, as well as a transparent layer 104, for example made of polycarbonate.
  • These two layers can be protective layers. The transparency of these protective layers makes it possible to observe the document 100 or 100' from its front side or its rear side while viewing information present on one or the other side.
  • a metal layer 102 was assembled above the matrix of colored sub-pixels.
  • a metal layer 102 has been assembled below the matrix of colored sub-pixels.
  • This layer can be chosen so that perforations can be formed in this layer easily, for example by application of a laser beam with a given wavelength called perforation wavelength.
  • This layer 102 can consist of an opaque reflective metallic film, this metallic film being able for example to be produced by deposition of a metallic ink.
  • the present disclosure concerns a security document comprising a stack of layers comprising a matrix of colored sub-pixels, a metal layer adjacent to at least part of one face of the matrix of sub-pixels colored, in which the metal layer has perforations facing sub-pixels of the matrix of colored sub-pixels.
  • Documents 100 or 100' may be a representation of document D of the figure 1 .
  • the documents 1000 and 1000' differ respectively from the documents 100 and 100' in that the metal layer 102' is positioned on or under a part, or window, of the document 1000 or 1000' and does not cover the entire matrix of colored subpixels 101. According to certain embodiments, this metal layer 102' can be deposited on or under several parts or windows of document D.
  • THE figures 4a and 4b show document 1000' after a step in which perforations are formed in the metal layer 102' has been carried out. This step may include the application of a laser beam at the perforation wavelength. It should be noted that the figures 4a and 4b relate to documents 1000 and 1000', i.e. to the positioning of the metal layer on part of the sub-pixel matrix as represented by the figures 3a and 3b but of course this also applies to documents 100 and 100' as represented in figures 2a and 2b .
  • this metallic layer above or below certain colored sub-pixels makes it possible to accentuate the brightness and contrast of the image formed by the colored sub-pixels.
  • a colored image appears when looking at the 1000 or 1000' document, with brighter colors than in the techniques according to the prior art.
  • the combination of patterns and perforations forms image pixels, but, as will be described below, those obtained after the optional laserization step are called pixels.
  • the combination of the perforated metal layer 102' makes it possible to obtain a very wide color gamut, in particular for the brightest colors.
  • FIG. 5a represents a sectional view of the security document 1000 when illuminated from its rear side.
  • the rear face of the document 1000 is exposed to a light source and more particularly the window F.
  • the yellow component is no longer present in the pixel displayed on the front face and the combination of the adjacent cyan and magenta subpixels gives a blue color whose luminance and contrast are accentuated compared to the prior art or by compared to pixels located outside the window F.
  • the yellow and magenta components are no longer present in the pixel displayed on the front face and the combination of the adjacent cyan and yellow sub-pixels gives a green color whose luminance and contrast are accentuated compared to the prior art or compared to the pixels located outside the window F. This is also accentuated by the presence of the metallic layer above the magenta sub-pixel located to the right of the window.
  • FIG. 5b represents a sectional view of the security document 1000 when illuminated from its front face.
  • the front face of the document 1000 is exposed to a light source and more particularly the window F.
  • the metal layer 102' present above the first and second yellow sub-pixels of the window F prevents the light from reaching these sub-pixels. -pixels yellow.
  • the combination of the cyan and magenta sub-pixels located between these two yellow sub-pixels gives a pixel whose brightness is modified by this non-reflection of the light on the yellow sub-pixels framing them and gives a blue brightness with levels of gray, NVG, the presence of gray being due to the gray color of the metallic layer present on the adjacent yellow sub-pixels.
  • the combination of the cyan and yellow sub-pixels located between these two magenta sub-pixels gives a pixel whose brightness is modified by this non-reflection of the light on the magenta sub-pixels framing them and gives a green brightness with levels of gray, NVG, the presence of gray being due to the gray color of the metallic layer present on the adjacent yellow sub-pixels.
  • FIG. 5c represents a sectional view of the security document 1000' when illuminated from its rear side.
  • the rear face of the document 1000' is exposed to a light source and more particularly the window F.
  • the yellow component is no longer present in the pixel displayed on the front face and the combination of the adjacent cyan and magenta subpixels gives a blue color whose luminance and contrast are accentuated compared to the prior art or by compared to pixels located outside the window F.
  • the yellow and magenta components are no longer present in the pixel displayed on the front face and the combination of the adjacent cyan and yellow sub-pixels gives a green color.
  • whose luminance and contrast are accentuated compared to the prior art or compared to the pixels located outside the window F. This is also accentuated by the presence of the metallic layer above the magenta sub-pixel located on the right from the window.
  • the color rendering of figures 5a And 5c is the same.
  • FIG. 5d represents a sectional view of the security document 1000' when illuminated from its front face.
  • the front face of the document 1000' is exposed to a light source and more particularly the window F.
  • the adjacent sub-pixel on the right lets light pass through (because layer 102' is perforated under the magenta sub-pixel) and thus we observe a predominance of the yellow color compared to the other sub-pixels.
  • the color observed is a yellow whose luminance and contrast are accentuated compared to the prior art or compared to the pixels located outside the window F.
  • These two yellow and magenta sub-pixels being surrounded by blue sub-pixels under which the layer 102' is perforated, these two blue sub-pixels let the light pass.
  • the yellow and magenta components have increased reflectivity compared to the adjacent blue sub-pixels and thus, we observe a predominance of the red color (combination of yellow and magenta).
  • the color observed is a red whose luminance and contrast are accentuated compared to the prior art or compared to the pixels located outside the window F.
  • FIG. 5a to 5d illustrate that the perforated metal layer advantageously makes it possible to obtain modified colors and in particular contrast and accentuated brightness.
  • this perforated metal layer makes it possible to widen the color gamut obtained by the sub-pixel matrix in the absence of the perforated metal layer.
  • this document generally includes, on a surface V of the document, an image representative of the face of the holder of the document.
  • this image may be desired to reproduce, in a window F of dimension smaller than the surface V, this image with a greater color gamut.
  • the present disclosure can advantageously allow this reproduction.
  • the presence of this portrait in window F improves the security of the document by making it more difficult to forge.
  • the rendering of colors being different in transmission or reflection of light on the document this falsification is made even more complex.
  • this window F it may also be desired to represent in this window F, an image or information already represented in one or more parts of the document, with for example a rotation of this information in the window F relative to their orientation in the other part of the document. document.
  • the metal layer may be located above the pixel array in one or more document windows and below the pixel array in one or more document windows. This makes it possible to further improve the security of the document, by making its production more complex.
  • the metal layer can be partially demetalized beforehand in order to promote adhesion of the layers and make the document more resistant. .
  • a demetallization of around 2% of the metal layer may be sufficient to achieve this goal.
  • the transparency of the protective layers 103 and 104 in the different embodiments illustrated above can allow visualization of the information contained in the window(s) F on both sides of the document.
  • the visual rendering can also be different depending on whether we observe the document from its front side or its back side.
  • transparent layers below and above the assembly formed by the matrix of pixels and the metallic layer allows this visual rendering.
  • the presence of transparent layers on the other parts of the document or on all other parts of the document is optional, at least on both sides.
  • the window includes a part, modified or not, of content reproduced on another part of the document, then it is necessary that this other part is visible and that the document therefore also includes a transparent layer at this part so that this content is visible by observing at least one of the two sides of the document.
  • colored lines are aligned in groups of three colors, i.e. three lines.
  • colored subpixels are arranged in the form of a mosaic by alternating cyan, magenta and yellow subpixels in each row and column.
  • Examples of arrangement of figures 6 And 7 are given as an example of an arrangement representation of the sub-pixel matrix and can be used in the sub-pixel matrices represented in the figures 1 to 5 .

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Optics & Photonics (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
  • Laminated Bodies (AREA)
EP23200582.7A 2022-11-23 2023-09-28 Sicherheitsdokument mit einer perforierten metallschicht neben mindestens einem teil einer seite einer farbigen subpixelmatrix und herstellungsverfahren dafür Pending EP4375083A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2212224A FR3142123A1 (fr) 2022-11-23 2022-11-23 Document de sécurité comprenant une couche métallique perforée adjacente à au moins une partie d’une face d’une matrice de sous-pixels colorés et procédé de fabrication.

Publications (1)

Publication Number Publication Date
EP4375083A1 true EP4375083A1 (de) 2024-05-29

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EP23200582.7A Pending EP4375083A1 (de) 2022-11-23 2023-09-28 Sicherheitsdokument mit einer perforierten metallschicht neben mindestens einem teil einer seite einer farbigen subpixelmatrix und herstellungsverfahren dafür

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EP (1) EP4375083A1 (de)
FR (1) FR3142123A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2972553A1 (fr) 2011-03-10 2012-09-14 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
WO2016030315A1 (de) * 2014-08-26 2016-03-03 Bundesdruckerei Gmbh Farbige lasergravur
FR3055112A1 (fr) * 2016-08-19 2018-02-23 Oberthur Technologies Document de securite comprenant une couche laserisable et un motif a eclairer pour colorer une image en niveaux de gris, et procedes de fabrication et de lecture correspondants.
WO2019034398A1 (de) * 2017-08-15 2019-02-21 Leonhard Kurz Stiftung & Co. Kg Dokument, verfahren zur herstellung eines dokuments sowie eine vorrichtung zur durchführung eines verfahrens
WO2022112708A1 (fr) * 2020-11-30 2022-06-02 Idemia France Image personnalisee formee a partir d'une couche metallique et d'un reseau lenticulaire

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2972553A1 (fr) 2011-03-10 2012-09-14 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
WO2016030315A1 (de) * 2014-08-26 2016-03-03 Bundesdruckerei Gmbh Farbige lasergravur
FR3055112A1 (fr) * 2016-08-19 2018-02-23 Oberthur Technologies Document de securite comprenant une couche laserisable et un motif a eclairer pour colorer une image en niveaux de gris, et procedes de fabrication et de lecture correspondants.
WO2019034398A1 (de) * 2017-08-15 2019-02-21 Leonhard Kurz Stiftung & Co. Kg Dokument, verfahren zur herstellung eines dokuments sowie eine vorrichtung zur durchführung eines verfahrens
WO2022112708A1 (fr) * 2020-11-30 2022-06-02 Idemia France Image personnalisee formee a partir d'une couche metallique et d'un reseau lenticulaire

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Publication number Publication date
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