WO2022171625A2 - Document de sécurité - Google Patents

Document de sécurité Download PDF

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Publication number
WO2022171625A2
WO2022171625A2 PCT/EP2022/053008 EP2022053008W WO2022171625A2 WO 2022171625 A2 WO2022171625 A2 WO 2022171625A2 EP 2022053008 W EP2022053008 W EP 2022053008W WO 2022171625 A2 WO2022171625 A2 WO 2022171625A2
Authority
WO
WIPO (PCT)
Prior art keywords
switchable
security document
optically variable
document according
banknote
Prior art date
Application number
PCT/EP2022/053008
Other languages
English (en)
Other versions
WO2022171625A3 (fr
Inventor
Robert Laird Stewart
Sina GREBRODT
Original Assignee
Koenig & Bauer Banknote Solutions Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koenig & Bauer Banknote Solutions Sa filed Critical Koenig & Bauer Banknote Solutions Sa
Priority to EP22704530.9A priority Critical patent/EP4291416A2/fr
Publication of WO2022171625A2 publication Critical patent/WO2022171625A2/fr
Publication of WO2022171625A3 publication Critical patent/WO2022171625A3/fr

Links

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
    • B42D25/324—Reliefs
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • 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
    • 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
    • B42D25/328—Diffraction gratings; Holograms
    • 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
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/369—Magnetised or magnetisable materials
    • 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
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks

Definitions

  • the present invention concerns a security document and relates particularly, but not exclusively, to banknotes and banknote sheets.
  • Security documents include licences, certificates, cheques and passports for example.
  • Level 1 security features i.e. features recognisable by the general public
  • optically variable feature any optical structure applied to a security document which results in a variation in the surface appearance of the security document according to the orientation from which it is viewed.
  • Such optical structures include both iridescent structures such as lenticular arrays, colour-shifting inks, holograms, diffraction gratings and thin films for example and non-iridescent structures such as watermarks and double sided printing for example which appear differently according to whether they are viewed from the obverse or the reverse or in transmission (i.e. illuminated from behind the surface facing the viewer).
  • WO 2006/110622A to provide electrically-switchable structures in product authentication labels, utilising electrochromic ink to change the appearance in response to an electric signal.
  • the label may incorporate film electrodes of e.g. Indium Tin Oxide (ITO) to apply the electric signal to a region of electrochromic ink.
  • ITO Indium Tin Oxide
  • US 10,198,890 to provide hybrid banknotes incorporating printed electronic circuitry.
  • US2019/039402 describes a secure item comprising a revealing raster and a combined image, or assembly comprising a secure item and another object, the secure item comprising one of the revealing raster and of the combined image and the object comprising or forming the other of the revealing raster and of the combined image.
  • US2020/019740 describes a carrier for representing a monetary value as a means of payment comprising a substrate, a control unit mounted to said substrate, a value store adapted and structured to store a carrier value of said carrier, and an interface circuit for electronic communication with said control unit.
  • US2010/045027 describes an optically variable security device comprising a photonic crystal which, upon receipt of incident light, generates a first optical effect, and which, when the device is subjected to an external stimulus, generates a second optical effect that is different from the first optical effect. At least one of the first and second optical effects is an optically variable effect observable over a set of directions and caused by the light being selectively reflected or transmitted by the crystal.
  • US2013/147179 describes an integrated security structure comprising a substrate forming part of a bank note, identification document, or other security device; an active device within said substrate changing colour between at least two colours; and wherein a colour of said substrate surrounding said active device matches one of said at least two colours to form a metameric device.
  • W02009/074284 describes an optically variable security element for securing valuable articles, having an optically variable ink layer that includes first, optically variable effect pigments for producing a viewing-angle-dependent visual impression, and that includes second effect pigments that are reversibly alignable by an external magnetic field, the degree of markedness of the viewing-angle- dependent visual impression of the optically variable effect pigments depending on the orientation of the magnetically alignable effect pigments relative to the plane of the ink layer.
  • US2008/198278 describes a multilayer body comprising an optically variable device active first layer system having an optical effect; and an electrically controllable second layer system for influencing the optical effect of the first layer system and is arranged above the first layer system.
  • the first layer system includes a metallic reflective layer forming a lower electrode layer of the second layer system.
  • thermochromic coating is applied over the indicia.
  • the thermochromic coating may be coloured below an activation temperature so as to obscure the indicia and enhance the visibility of the optically variable device and colourless at or above the activation temperature so as to reveal the indicia and to render the optically variable device invisible in reflected light.
  • the thermochromic coating may be colourless below and coloured at or above the activation temperature.
  • An object of the present invention is to provide a security document which is externally switchable but with higher security. Accordingly, in one aspect the invention provides a switchable security document having an optically variable feature which is coupled to a switchable visible region, the switchable visible region having a first state in which the optically variable feature is deactivated and being switchable to a second state in which the optically variable feature is activated and thereby visibly apparent to a user.
  • the optically variable region may comprise a micro-optical layer.
  • Micro-optics advantageously result in a more secure document because they have an extra level of complexity and difficulty in their manufacture.
  • the minimum lens size of the lenses in the micro-optical layer is preferably proportional to the substrate thickness.
  • the optically variable region may comprise a diffraction pattern.
  • the optically variable region may comprise a hologram.
  • the optically variable region may comprise printed regions of the security document which are mutually offset in the depth direction and have a predetermined registration so as to generate optical variation between views from different viewpoints.
  • the switchable visible region comprises a switching layer for generating the first and second states.
  • the switching layer is electrochromic.
  • An electrochromic switching layer is advantageously more secure than, for example, a thermochromic switching layer for several reasons. These include improved reaction time and controllability, increased complexity and increased thickness.
  • the security document comprises a banknote.
  • the invention provides a method of switching a switchable security document in accordance with the first aspect in which the switchable visible region is switched between the first and second states in association with the transmission of a signal over a network or to or from a remote device.
  • the transmitted signal encodes information (e.g. the monetary value) represented by the security document.
  • the transmitted signal is encrypted.
  • Figure 1 is a diagrammatic cross-section of a banknote in accordance with the present invention in a first, deactivated state
  • Figure 2 is a diagrammatic cross-section of the banknote of Figure 1 in a second, activated state
  • Figure 3 is a diagrammatic representation of an expanded portion of the banknote of Figures 1 and 2, illustrating its change in appearance between different viewpoints;
  • Figure 4 is a perspective view of a cylindrical lenticular array usable in the banknote of Figures 1 and 2;
  • Figure 5 is a perspective view of a two-dimensional micro-lens array usable in the banknote of Figures 1 and 2;
  • Figure 6 is a diagrammatic cross-section of a further banknote in accordance with the invention in which the information layer is sandwiched between two substrate sheets, the banknote being in a first, deactivated state;
  • Figure 7 is a diagrammatic cross-section of the banknote of Figure 6 in a second, activated state
  • Figure 8 is a diagrammatic representation of an expanded portion of the banknote of Figures 6 and 7, illustrating its change in appearance between different viewpoints;
  • FIG. 9 is a diagrammatic representation of a further banknote in accordance with the present invention in a second, activated state
  • Figure 10 is a diagrammatic representation of the banknote of Figure 9 in a first, de-activated state
  • FIG 11 is a diagrammatic representation of a further banknote in accordance with the invention, provided with switching electrodes and a microcontroller;
  • Figure 12A is a view from above left of an embodiment of a banknote in accordance with the present invention in a first, deactivated state
  • Figure 12B is a view from above right of an embodiment of a banknote in accordance with the present invention in its first, deactivated state;
  • Figure 13A is a view from above left of the banknote of Figures 12A and 12B in its second, activated state;
  • Figure 13B is a view from above right of the banknote of Figure 13B in its second, activated state
  • Figure 14 is a diagrammatic cross-section of a further embodiment of a banknote in accordance with the present invention in a first, deactivated state
  • Figure 15 is a diagrammatic cross-section of the banknote of Figure 14 in a second, activated state
  • Figure 16 is a view from above (obverse surface) of the banknote of Figure 15 in its activated state;
  • Figure 17 is a view from below (reverse surface) of the banknote of Figure 15 in its activated state
  • Figure 18 is a view from above or below of the banknote of Figure 15 in its activated state when viewed in transmission, and
  • Figure 19 is a diagrammatic representation of a banknote in accordance with the present invention being read by an electronic reader and switched to generate a signal which is transmitted to a remote device and/or network.
  • a banknote comprising a substrate 3 of e.g. paper on which is printed an electrochromic or other switching layer 2.
  • a lenticular layer 1 is deposited on the electrochromic switching layer by known methods.
  • the lenticular layer may comprise a two-dimensional array of micro-lenses 10 as shown in Figure 4 or an array of cylindrical lenses 10' as shown in Figure 5. In each case the lenticular array is focused on the surface of the electrochromic switching layer 2.
  • the electrochromic switching layer 2 is deposited in predetermined regions 2A bounded by regions of background colour 6 which match the optical properties of regions 2A (e.g. colour, opacity) only in the unactivated state of regions 2A, as shown in Figure 1.
  • regions 2A e.g. colour, opacity
  • the entire layer 2 including regions 2A and 6 has a uniform appearance. Accordingly, in this state there are no colour transitions in switching layer 2 and hence the lenticular layer 1 does not generate an optically variable effect; i.e. the optically variable feature is deactivated.
  • the banknote has the same appearance whether viewed from top left or top right.
  • the regions of background colour 6 are formed of a non- electrochromic material which matches the colour properties of the electrochromic ink of regions 2A in one state of the electrochromic ink.
  • the regions of background colour may be formed of the same electrochromic material as regions 2A but may be non-switchable, e.g. because switching electrodes (not shown) are selectively formed in registration with regions 2A only.
  • FIGS 6 and 7 show a variant of the above embodiment in which a lenticular array, comprising a two-dimensional array of micro-lenses 10 or an array of cylindrical lenses 10', is deposited on a flexible transparent polymer layer 3', on the opposite side of which is deposited a switching layer 2 of electrochromic material over its entire area.
  • Transparent electrodes 5 of e.g. Indium Tin Oxide (ITO) are deposited on selected regions of the underside of electrochromic layer 2 and are protected by a further layer of flexible transparent polymer layer 3" which acts as a substrate.
  • the layer 3' or any additional layers or components may be provided with sufficient conductivity to act as a counter-electrode to electrodes 5.
  • the appearance of switching layer is uniform. Hence no optically variable feature is seen.
  • the lenticular elements 10/10' are focused on the surface of the switching layer 2.
  • the electrochromic switching layer 2 changes colour in selected regions 2A overlying the electrodes but not in the intermediate regions 2B. Accordingly, colour transitions are visible at the mutual boundaries of regions 2A and 2B which result in iridescence on shifting the viewpoint of a user from VL (upper left) to VR (upper right) as shown in Figure 8. These colour transitions appear as iridescence on tilting the banknote.
  • optically variable features other than iridescence are obtained in the second, activated state of the switchable visible region.
  • Figures 9 and 10 show a variant of the embodiment of Figures 1 and 2 in which a security document such as a banknote has a switching layer (e.g. an electrochromic switching layer) 2 which is deposited over a light-transmissive polymer substrate 3 and acts as a background to an image layer 4 sandwiched between a lenticular layer 1 and the switching layer.
  • Image layer 4 when it is visible, generates an optically variable feature as a result of its contrasting regions 4A and 4B, which may be formed in a finely detailed design.
  • image layer 4 may have a holographic image formed therein.
  • FIG. 11 shows diagrammcrtically a security document such as a banknote in which electrodes 5 (e.g. ITO or other transparent electrodes) are formed above and below an electrochromic switching layer 2 and arranged to generate contrasting regions 2A and 2B constituting an image in the activated state.
  • the electrodes are powered by a micro-controller and power supply circuit arrangement 7, as shown, which may be incorporated into the banknote or other security document.
  • a lenticular layer 1 overlies the sandwich of switching layer 2 and electrodes 5 and generates an optically variable feature only in the second, activated state shown in Figure 11.
  • FIGS 12A to 13B illustrate another embodiment of a banknote 20/20' in which a lenticular layer 1 is formed on a region of the banknote and a composite image is formed by a combination of a conventional printed image and an image formed by a switching layer (not shown) underlying the lenticular layer.
  • the banknote includes conventional indicia 8 showing e.g. its denomination.
  • Figures 12A and 12B show views from upper left and upper right respectively of the banknote 20 in its first, deactivated state, i.e. in which the switching layer is deactivated. In this state, there are no colour transitions between adjacent regions of the switching layer, nor are any such colour transitions in the conventional printed image. Accordingly, the composite image II appears the same in both views.
  • Figures 13A and 13B show views from upper left and upper right respectively of the banknote 20' which is in the second, activated state, i.e. in which the switching layer is activated. In this state, there are colour transitions between adjacent regions of the switching layer which cause its associated image to appear differently when viewed through the lenticular layer 1 according to whether the view is from upper left ( Figure 13A) or upper right ( Figure 13B).
  • the image 12 formed by the switching layer as seen from upper left overlaps with that of the associated conventional printed image and is substantially identical to image II of Figure 12A.
  • the image 12' as seen from upper right is substantially different from image 12 because a different portion of the image formed by the switching layer is seen through the lenticular layer (cf. e.g. Figure 3). Accordingly, as the activated banknote is tilted, the image seen by the user flips between 12 and 12'.
  • Figure 14 shows a security document (e.g. a banknote or a sheet of banknotes) comprising a translucent paper or flexible polymer substrate layer 3 on the opposite surfaces of which are deposited switching layers 2. These are arranged to be switchable only in selected regions 2A thereof, the regions on opposite sides of layer 3 having a predetermined registration.
  • a security document e.g. a banknote or a sheet of banknotes
  • the switching layers 2 are of uniform appearance. Accordingly, they do not exhibit any optically variable features.
  • the regions 2A change colour. Consequently, when the security document is viewed from above with illumination from above (viewing in reflection) the upper regions 2A are visible as shown in Figure 16.
  • the upper regions 2A are in the form of opposite parts of a star shape. Regions 2A can be independently activatable - i.e. one or both sides can be independently activated, as can one or more regions 2A on a given side.
  • lower region 2A When the security document is viewed from below with illumination from below (viewing in reflection) the lower region 2A is visible as shown in Figure 17.
  • lower region 2A is in the form of an arrow constituting the middle portion of a star shape.
  • the upper regions 2A combine visually with the lower region 2 to form a star shape, as shown in Figure 18.
  • the state of the electrochromic switching layer 2 may be switched to transition the optically variable feature from activated to deactivated and vice versa by applying a signal, e.g. via electrodes, of appropriate polarity.
  • any switchable material may be used for switching layer 2, e.g. electrochromic, photochromic, piezochromic or other material whose optical properties can be switched from a first, deactivated state to a second, activated state by a suitable input signal.
  • both states are stable.
  • Figure 19 shows a banknote 20' provided with an embedded pickup (e.g. an inductive or capacitive pickup) 15 which is coupled to its electrode arrangement (not shown) to control its electrochromic switching layer (not shown) which is disposed beneath a lenticular layer 1.
  • the banknote is optionally also provided with an embedded microprocessor 7 and associated electronic memory in which data corresponding to indicium 50 of the banknote is stored.
  • Banknote 20' is in its second, activated state and thus exhibits an optically variable feature such as iridescence or a change in appearance of an image I as explained above with reference to Figures 13A and 13B.
  • the banknote 20' is coupled to a read/write device 25 which has a transducer 26 (e.g. a coil if pickup 15 is inductive) which can couple to pickup 15.
  • the coil 26 is energised and controlled by control circuitry 27 which optionally also includes means for transferring data to and from microprocessor 7 and its associated memory.
  • Control circuitry 27 is arranged to read out data via microprocessor 7 indicative of the denomination of the banknote and to transmit a corresponding encrypted signal S either to a remote device D or a computer network N (which may be the internet or a cloud-based network for example). In this manner the value in the banknote is electronically transferred into e.g. a savings account or a merchant.
  • the read/write device 25 may also be arranged to carry out the reverse transaction, in which, in response to reception of a signal S from network N or device D, a deactivated banknote is activated to put it into its second state in which the optically variable feature is activated. In this manner, monetary value is transferred to the banknote from e.g. a savings account or a merchant.
  • the electrodes may be dispensed with and the electrochromic switching layer 2 may be switched by capacitive electrodes in the read/write device which apply an appropriate signal to the electrochromic switching layer.
  • the read/write device may be coupled to other security documents with the appropriate activatable or deactivatable optically variable features as described above, such as certificates, passports, licences or bankcards (e.g. debit or credit cards) for example.
  • certificates e.g. passports, licences or bankcards (e.g. debit or credit cards) for example.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

Un document de sécurité commutable, en particulier un billet de banque, comprend une couche (1) de micro-lentilles (10) disposées sur une couche de commutation électrochromique (2) qui a un premier état désactivé (Figure 1) et un second état activé (Figure 2). Dans l'état activé (mais pas à l'état désactivé)) une image est formée sous la couche de microlentilles qui constitue une caractéristique optiquement variable, dans le sens où son aspect change avec le point de vue de l'utilisateur. Un tel élément ne peut pas être contrefait par balayage et impression. Un microprocesseur et une source de puissance peuvent être couplés par des électrodes à la couche de commutation électrochromique et agencés pour générer un signal représentant la valeur du billet de banque lors de la désactivation dans le premier état.
PCT/EP2022/053008 2021-02-15 2022-02-08 Document de sécurité WO2022171625A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22704530.9A EP4291416A2 (fr) 2021-02-15 2022-02-08 Document de sécurité

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2102109.2 2021-02-15
GB2102109.2A GB2603803A (en) 2021-02-15 2021-02-15 Security document

Publications (2)

Publication Number Publication Date
WO2022171625A2 true WO2022171625A2 (fr) 2022-08-18
WO2022171625A3 WO2022171625A3 (fr) 2022-10-06

Family

ID=75338899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/053008 WO2022171625A2 (fr) 2021-02-15 2022-02-08 Document de sécurité

Country Status (3)

Country Link
EP (1) EP4291416A2 (fr)
GB (1) GB2603803A (fr)
WO (1) WO2022171625A2 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347646A (en) 1999-03-12 2000-09-13 Rue De Int Ltd Security element comprising thermochromic coating and optically variable device eg hologram
WO2006110622A2 (fr) 2005-04-11 2006-10-19 Aveso, Inc. Structure d'etiquette en couches avec indicateur de duree
US20080198278A1 (en) 2005-07-04 2008-08-21 Polylc Gmbh & Co. Kg Multilayer Body with Electrically Controllable Optically Active Systems of Layers
WO2009074284A2 (fr) 2007-12-11 2009-06-18 Giesecke & Devrient Gmbh Élément de sécurité optiquement variable
US20100045027A1 (en) 2006-08-10 2010-02-25 De La Rue International Limited Photonic Crystal Security Device
US20130147179A1 (en) 2010-06-04 2013-06-13 Polyvalor, Limited Partnership Metameric security devices using an active material
US10198890B2 (en) 2016-04-19 2019-02-05 X-Celeprint Limited Hybrid banknote with electronic indicia using near-field-communications
US20190039402A1 (en) 2015-12-29 2019-02-07 Oberthur Fiduciaire Sas Secure item comprising a revealing screen and a combined image
US20200019740A1 (en) 2017-03-06 2020-01-16 Orell Füssli Sicherheitsdruck Ag An owner-controlled carrier of value, a payment infrastructure and method for operating this infrastructure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7468842B2 (en) * 2004-11-22 2008-12-23 Nanoventions Holdings, Llc Image presentation and micro-optic security system
GB201520085D0 (en) * 2015-11-13 2015-12-30 Rue De Int Ltd Methods of manufacturing image element arrays for security devices
GB2557167B (en) * 2016-09-30 2020-03-04 De La Rue Int Ltd Security devices

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347646A (en) 1999-03-12 2000-09-13 Rue De Int Ltd Security element comprising thermochromic coating and optically variable device eg hologram
WO2006110622A2 (fr) 2005-04-11 2006-10-19 Aveso, Inc. Structure d'etiquette en couches avec indicateur de duree
US20080198278A1 (en) 2005-07-04 2008-08-21 Polylc Gmbh & Co. Kg Multilayer Body with Electrically Controllable Optically Active Systems of Layers
US20100045027A1 (en) 2006-08-10 2010-02-25 De La Rue International Limited Photonic Crystal Security Device
WO2009074284A2 (fr) 2007-12-11 2009-06-18 Giesecke & Devrient Gmbh Élément de sécurité optiquement variable
US20130147179A1 (en) 2010-06-04 2013-06-13 Polyvalor, Limited Partnership Metameric security devices using an active material
US20190039402A1 (en) 2015-12-29 2019-02-07 Oberthur Fiduciaire Sas Secure item comprising a revealing screen and a combined image
US10198890B2 (en) 2016-04-19 2019-02-05 X-Celeprint Limited Hybrid banknote with electronic indicia using near-field-communications
US20200019740A1 (en) 2017-03-06 2020-01-16 Orell Füssli Sicherheitsdruck Ag An owner-controlled carrier of value, a payment infrastructure and method for operating this infrastructure

Also Published As

Publication number Publication date
WO2022171625A3 (fr) 2022-10-06
GB202102109D0 (en) 2021-03-31
GB2603803A (en) 2022-08-17
EP4291416A2 (fr) 2023-12-20

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