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.

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.

Abstract: The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.

Abstract: In one embodiment of the present invention, a reading device and a method for determining an identity code is disclosed arranged at a package for a product. At least one embodiment of the present invention is based on capacitive measurements performed in capacitors formed between antennas of the reading device and communication areas of the identity code. The reading device is provided with an antenna or activation element for decoupling or minimizing perturbation signals generated in an electrically conductive foil of the package.

Abstract: A device for determining a parameter history indication of at least one external parameter includes, in at least one embodiment, a first electrode portion, in consuming contact with a first electrolyte, and a second electrode portion, in consuming contact with a second electrolyte. A consumption process of the second electrode portion, in at least one embodiment, is controllable by an amount of consumption of said first electrode portion. The electrolytes are so arranged that consumption rates of the first electrode portion and the second electrode portion present different dependencies on the at least one external parameter. A kit of parts including such a device, and a method for determining a parameter history indication of at least one external parameter are also disclosed.

Abstract: The authenticity of a security document, such as a bank note, is verified by use of a security feature arranged in or on the document, which security feature comprises an antenna arranged to receive EM-radiation from an external energy source; a rectifier arranged to receive electric energy from the antenna and convert it into a rectified current; and an electrochromic display arranged to alter its electrochromic state in response to said rectified current. Hence, a security feature able alter its appearance in response to EM-radiation is provided, which comprises a display that can be given a large variety of two dimensional shapes.

Abstract: An electrochemical structure is disclosed, including a first electrochemically active element and an electrolyte, arranged near or in contact with the first electrochemically active element. In at least one embodiment, the electrolyte is deformable and/or movable between a first state, wherein the structure provides a first electric characteristic, and a second state, wherein the structure provides a second, different electric characteristic.

Abstract: An electrochemical device is provided, comprising a source contact connected to a first antenna pad, a drain contact connected to a second antenna pad, at least one gate electrode, an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which electrochemically active element comprises a transistor channel and is of a material comprising an organic material having the ability of electrochemically altering its conductivity through change of redox state thereof, and a solidified electrolyte in direct electrical contact with the electrochemically active element and the at least one gate electrode and interposed between them in such a way that electron flow between the electrochemically active element and the gate electrode(s) is prevented. In the device, flow of electrons between source contact and drain contact is controllable by means of a voltage applied to the gate electrode(s).

Abstract: An electrochemical device is provided, comprising a source contact connected to a first antenna pad, a drain contact connected to a second antenna pad, at least one gate electrode, an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which electrochemically active element comprises a transistor channel and is of a material comprising an organic material having the ability of electrochemically altering its conductivity through change of redox state thereof, and a solidified electrolyte in direct electrical contact with the electrochemically active element and said at least one gate electrode and interposed between them in such a way that electron flow between the electrochemically active element and said gate electrode(s) is prevented. In the device, flow of electrons between source contact and drain contact is controllable by means of a voltage applied to the gate electrode(s).

Abstract: In one embodiment of the present invention, a reading device and a method for determining an identity code is disclosed arranged at a package for a product. At least one embodiment of the present invention is based on capacitive measurements performed in capacitors formed between antennas of the reading device and communication areas of the identity code. The reading device is provided with an antenna or activation element for decoupling or minimizing perturbation signals generated in an electrically conductive foil of the package.

Abstract: A paper- or cardboard-based security product and a method of manufacturing it. The product comprises a paper or a cardboard which is equipped with an identifiable security symbol. According to the present invention, the security symbol comprises a layer in the product, one which consists of a synthetic, electrically conductive polymer, the conductivity of which has been changed locally to form an electrically conductive or, alternatively, electrically non-conductive figure. Furthermore, a figure indicating the security symbol has been fitted on the surface of the paper or the cardboard product. A security product according to the present invention can be produced simply by first applying a conductive polymer, for instance in a non-conductive form, onto a paper, after which an acidic figure is printed in such as way that the area below the figure becomes conductive. The figure can be detected and in this way it acts as a guarantee of authenticity for the product.

Abstract: A device for determining a parameter history indication of at least one external parameter, comprises an electrode, termed “first electrode” (2, 2a, 2b, 2c), and another electrode, termed “third electrode” (4, 4a, 4b, 4c). The electrodes (2, 2a, 2b, 2c; 4, 4a, 4b, 4c) are in consuming contact with a respective electrolyte (5, 6, 6a, 6b, 6c). A consumption process of the third electrode is controllable by an amount of consumption of said first electrode. The electrolytes are so arranged that consumption rates of the first and third electrodes (2, 2a, 2b, 2c; 4, 4a, 4b, 4c) present different dependencies on the at least one external parameter. A kit of parts including such a device, and a method for determining a parameter history indication of at least one external parameter are also disclosed.

Abstract: An electrochemical device is provided, comprising a source contact connected to a first antenna pad, a drain contact connected to a second antenna pad, at least one gate electrode, an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which electrochemically active element comprises a transistor channel and is of a material comprising an organic material having the ability of electrochemically altering its conductivity through change of redox state thereof, and a solidified electrolyte in direct electrical contact with the electrochemically active element and the at least one gate electrode and interposed between them in such a way that electron flow between the electrochemically active element and the gate electrode(s) is prevented. In the device, flow of electrons between source contact and drain contact is controllable by means of a voltage applied to the gate electrode(s).