Abstract: A method of manufacturing a security device component includes: providing a photosensitive film including a diazonium compound which decomposes upon exposure to radiation of a predetermined wavelength; providing a dye coupler film comprising one or more dye coupler compositions; exposing elements of the photosensitive film to radiation of the predetermined wavelength in accordance with a predetermined pattern; and contacting at least part of the exposed photosensitive film against at least part of the dye coupler film so as to effect at least partial transfer of the one or more dye coupler compositions to the exposed photosensitive film, whereupon unexposed elements of the photosensitive film exhibit one or more colours such that the photosensitive film exhibits a reproduction of the predetermined pattern.
Abstract: A method is provided of identifying a security document using an identifying device. The identifying device is provided with a capacitance sensor and a second sensor. The method includes capacitively coupling a first element of the security document with the capacitance sensor and obtaining first data from the first element using the capacitance sensor. Second data is also obtained from the security document using the second sensor. Output data is then generated based upon the first and second data. A corresponding device and system are also presented.
Abstract: A method of forming a security document, comprises providing a thread comprising at least one region of heat-transformable material, this material having an optical effect which is transformable in response to applied heat. The thread is integrated with a document substrate material during a substrate forming process, so as to produce a security document substrate having at least one windowed region in which the thread is exposed at the substrate surface, and at least one bridge region in which the thread is not exposed. A patterned heat process is then applied, causing a structural modification in the heat-transformable layer of the thread so as to produce an observable optical effect representative of the heat pattern at one or more predetermined positions with respect to one or more of the said windowed region or bridge region. Security documents bearing threads with such optically transformable materials are also disclosed.
Abstract: High frequency currents may be rectified by means of a printable diode comprising a first and a second electrode, between which a semiconducting layer comprising semiconducting particles embedded in an inert matrix, and a conducting layer comprising conducting particles embedded in an inert matrix are arranged.
November 22, 2011
Date of Patent:
November 29, 2016
ACREO SWEDICH ICT AB, DE LA RUE INTERNATIONAL LIMITED
Magnus Berggren, Xin Wang, Mats Robertsson, Petronella Norberg, Philip George Cooper, Peter Andersson Ersman
Abstract: A security element including substrate on which is disposed: in first area, a first optically variable device including a diffractive or reflective relief structure and reflection enhancing material following contours of relief structure; and, in second area, a second optically variable device including an iridescent amplitude interference material. First optically variable device is constituted by a plurality of sub-areas arranged in cyclically repeating sequence along predetermined direction of the security element, the plurality of sub-areas collectively forming first area.
Abstract: The invention relates to improvements in substrates and in particular to new substrates having magnetic and visual security features, which provide security against imitation. A security substrate comprising a transparent polymer carrier layer bearing indicia formed from a plurality of opaque and non-opaque regions and a transparent magnetic layer supported by the carrier layer containing a distribution of particles of a hard magnetic material of a size and distributed in a concentration at which the magnetic layer remains transparent.
August 18, 2008
Date of Patent:
November 1, 2016
De La Rue International Limited
Roland Isherwood, James Snelling, Alan Brown
Abstract: A lenticular device includes an array of lenticular focusing elements located over a corresponding array of pairs of image strips such that, in a first viewing direction, a first image strip from each pair is viewed by respective ones of the lenticular focusing elements and, in a second viewing direction, different from the first, a second image strip from each pair is viewed by respective ones of the lenticular focusing elements, One of each pair of image strips has portions defining a first image in a first color and a second image in a second color respectively, and the other of each pair of image strips has portions defining the first image in the second color and the second image in the first color respectively, whereby on tilting the device, a color switch is observed between the first and second images.
October 27, 2010
Date of Patent:
August 30, 2016
DE LA RUE INTERNATIONAL LIMITED
Brian William Holmes, Lawrence George Commander
Abstract: A method of manufacturing a pattern on a substrate web includes providing a production tool having a surface relief structure of elevations and depressions. The elevations correspond to a desired pattern. A curable material is applied to the elevations. The material is brought into contact with a substrate web at a first location. The substrate web and surface relief structure are transported together in contact from the first location to a second location spaced from one another along the transport direction of the substrate web. The substrate web is separated from the surface relief structure at the second location whereupon the material forming the pattern is affixed to and carried by the substrate web. The material is cured by exposure to a curing energy source, either between the first and second locations and/or after the substrate web has been separated from the surface relief structure at the second location.
Abstract: A security device is disclosed having a region of piezochromic material and an integrated relief structure. The security device is arranged such that when a stress is generated in the piezochromic material and relief structure, an optical effect is generated in the piezochromic material.
April 13, 2010
Date of Patent:
August 9, 2016
DE LA RUE INTERNATIONAL LIMITED
Robert Whiteman, Christopher John Eastell
Abstract: A security device is presented, including: an array of focusing elements, each focusing element being adapted to focus light in at least two orthogonal directions, the focusing elements being arranged on a regular two-dimensional grid; and an array of elongate image elements overlapping the array of focusing elements, configured such that each focusing element can direct light from any one of a respective set of at least two elongate image elements to the viewer, in dependence on the viewing angle. In a first region of the security device, the elongate image elements extend along a first direction, and in a second region of the security device, the elongate image elements extend along a second direction which is different to the first direction.
Abstract: A security device has: an array of focusing elements on a grid; and an array of image elements overlapping the focusing elements array and arranged based on a repeating unit cell defining image element positions. The unit cell periodicity is substantially the same as the grid's. Each position is assigned to carry an image element of a respective corresponding image. Dependent on angle, the focusing elements array directs light from selected positions, as the device is tilted different ones of the respective images are displayed by the elements at the selected positions in combination, sequentially. Each unit cell centre area, larger than each outer area, is assigned to carry element(s) of a corresponding centre image, the outer areas assigned to carry element(s) of other respective images, such that the range of viewing angles over which the centre image is displayed is greater than that over which each other image is.
Abstract: A security device comprises a transparent, coloured element in a first region of the device and in a surface of which a first optically variable effect generating relief structure is formed. A reflection enhancing layer extends over the first optically variable effect generating relief microstructure and follows the contour of the relief, the reflection enhancing layer also being provided in a second region of the device laterally offset from the first region.
Abstract: The present invention relates to improvements in security devices that can be used in various authenticating or security applications, and in particular to an optically variable security device which can be viewed under low light conditions. The security device comprises a light deflection structure having a first side and a second opposing side. A colorshifting layer is applied to the first side of the light deflection structure and a reflection layer is applied to at least a first region of the second side of the light deflection structure so as to provide a strong reflection in a direction substantially parallel to the incident light source when the direction of the incident light is at an angle away from the normal to the security device. The security device has at least one second region in which the reflection layer is absent, said first and second regions defining indicia.
Abstract: A method of forming an optically variable security device is provided. In the method, a photonic crystal material is provided and a process is performed upon the material which causes deformation of the material so as to form a first region (A) for which incident light received by the crystal material is selectively reflected or transmitted to generate a first optically variable effect, and a second region (B) for which incident light received generates an optical effect, different from the first optically variable effect. Corresponding devices having first and second regions are also disclosed.
Abstract: An apparatus is provided for magnetically imprinting indicia into a layer on an article, the layer comprising a composition in which magnetic or magnetizable particles are suspended. The apparatus comprises: a soft magnetizable sheet, having an outer surface arranged to face the article in use, and an opposing interior surface; and a permanent magnet, shaped such that its magnetic field contains perturbations giving rise to indicia. The permanent magnet is disposed adjacent the interior surface of the soft magnetizable sheet. The soft magnetizable sheet enhances the perturbations of the magnetic field of the permanent magnet such that when the layer to be imprinted is located adjacent the outer surface of the soft magnetizable sheet, the magnetic or magnetizable particles are oriented by the magnetic field to display the indicia.
Abstract: A moiré magnification device includes a transparent substrate, the transparent substrate carrying a regular array of micro-focusing elements on a first surface, where the focusing elements define a focal plane, and a corresponding array of microimage element unit cells located in a plane substantially coincident with the focal plane of the focusing elements, where each unit cell includes at least two microimage components. The pitches of the micro-focusing elements and the array of microimage element unit cells and their relative locations are such that the array of micro-focusing elements cooperates with the array of microimage element unit cells to generate magnified versions of the microimage components due to the moiré effect.
Abstract: This invention is directed to improvements in substrates, such as paper, incorporating a security device, and to documents made therefrom. The security substrate comprises at least one elongate security device, which security device has a series of first regions exposed at a series of windows formed in at least a first surface of the substrate and a series of second regions covered by the substrate at bridges formed between the windows in the first surface of the substrate. Each of the first regions is provided with a first security feature which is substantially of the same appearance in each region and is visible in each window when the first surface of the substrate is viewed ire reflected light.
Abstract: A moire magnification device is disclosed, including a transparent substrate carrying: a regular array of micro-focusing elements on a first surface, the focusing elements defining a focal plane; and a corresponding first array of microimage elements located in a plane substantially coincident with the focal plane of the focusing elements. The pitches of the micro-focusing elements and the array of microimage elements and their relative locations are such that the array of micro-focusing elements cooperates with the array of microimage elements to generate magnified version of the microimage elements due to the moire effect. Along at least one axis across at least a first region of the device, the pitch between the microimage elements and/or between the micro-focusing elements continuously varies across the respective array(s), whereby the moire effect causes different degrees of magnification of the image elements to occur.
Abstract: A security device comprises two or more regions (1, 2). Each region (1, 2) contains a material or combination of materials wherein the two or more regions exhibit substantially the same visible appearance under first viewing conditions and different visible appearances under second viewing conditions, the second viewing conditions. The second viewing conditions comprise a combination of a) visible light and b) substantially any UV wavelength.
Abstract: A security element is provided for a document of value. The security element includes an array of apertures through at least a portion of the document of value, the arrangement of apertures relative to one another forming an observable data item. The array of apertures includes apertures of at least two different shapes or orientations, the occurrence of the different shapes or orientations within the array representing an encoded data item. Also provided is a method of manufacturing a security element on a document of value, including: obtaining a first data item and generating an aperture array template; obtaining a second data item and encoding the second data item within the aperture array template; and perforating at least a portion of the security document according to the encoded aperture array template.