Abstract: A pyroelectric sensor includes several pixels distributed above a substrate and each pixel includes a first portion made of a pyroelectric material, in direct physical contact with a charge collection electrode, a second portion made of a pyroelectric material, in direct physical contact with a charge collection electrode, the first portion, the second portion and the at least one charge collection electrode being superposed above the substrate, at least one heating element to heat the first and second portions including a pyroelectric material, and an electronic device to measure a difference between charges generated by the first portion including a pyroelectric material and charges generated by the second portion including a pyroelectric material. The pyroelectric sensor makes it possible to suppress a useless part of a measurement signal. It is particularly advantageous for taking an image of a papillary print.

Abstract: A method for determining if a papillary print is comprised of living human tissue or not, using a papillary print sensor comprising in superposition, a contact surface, an array optical sensor, and a plurality of illuminating devices parallel between them. The method comprises illumination of the papillary print by the illuminating devices forming together, on the contact surface, a light pattern which is uniform along an axis that extends from one side to the other of a detecting surface of the array optical sensor, and acquisition of an image by the array optical sensor, with these steps being implemented at least once; in each image, selection of the pixels corresponding to the valleys or ridges of the print; and using the pixels selected, extraction of an optical characteristic defining the response to illumination, of the material comprising the papillary print.

Abstract: The invention relates to a print sensor (160) comprising, on a transparent support substrate, a plurality of elementary acquisition cells (161), each cell comprising a photodetector (PS), a pyroelectric conversion element (PYR), and at least one TFT transistor (RT, SF) connected to both the photodetector (PS) and the pyroelectric conversion element (PYR).

Abstract: A papillary print sensor comprising in superposition a contact surface to which the print to be imaged is intended to be applied, an array optical sensor and illuminating device. The illuminating device is arranged between the contact surface and a detecting surface of the array optical sensor, and consists of a plurality of organic light-emitting diodes, referred to as OLEDs. Each OLED extends uninterruptedly over more than a third of a width (L1) of the detecting surface, and the OLEDs extend together along one or two series of patterns that are parallel to one another and distributed along the length (L2) of the detecting surface. This configuration of the OLEDs allows in particular the transistors for controlling the OLEDs to be placed off the detecting surface (125).

Abstract: A thermal pattern sensor comprising a plurality of pixels, each pixel comprising at least one pyroelectric capacitor formed by at least one portion of pyroelectric material arranged between a lower electrode and an upper electrode, in which one of the lower and upper electrodes corresponds to an electrode for reading the pixel and in which a heating element that can heat the portion of pyroelectric material of the pyroelectric capacitor of the pixel by Joule effect during a measurement of the thermal pattern by the pyroelectric capacitor of the pixel is formed by the other of the lower and upper electrodes.

Abstract: The invention relates to a receptacle for storage of an object, containing a proximity sensor capable of detecting an action by a user close to or in contact with a surface of the receptacle, a transducer and a control circuit comprising an input coupled to the proximity sensor and an output connected to the transducer, the control circuit being configured to generate a control signal to be sent to the transducer when a user action is detected by the proximity sensor, characterized in that it also comprises an unpacking detector coupled to the control circuit and in that the control circuit is also configured to changeover from a standby mode during which it periodically awakens to query the unpacking detector, to a detection mode during which it periodically checks the state of its input coupled to the proximity sensor, after the unpacking detector has detected removal of the receptacle from a packaging.

Abstract: A compact device for capturing an imprint of a body part working by total reflection with dark background.

Abstract: Optical imaging device comprising: an array of substantially point light sources, an array of photo-detectors interlaced with the array of light sources, an optical medium of thickness greater than the pitch of the photo-detectors and forming capture and detection surfaces, means for successively switching on and off each of a part of the light sources and reading a part of the photo-detectors receiving rays coming from the switched on source and having undergone reflection against the detection surface while forming an angle of incidence estimated as a function of the optical medium and the element to image.

Abstract: A papillary print sensor is provided, including a light emitting device configured to emit light radiation towards the sensor; and a matrix photodetector configured to be sensitive to at least part of an emission spectrum of the light emitting device, the light emitting device and the matrix photodetector being distributed together in and/or above a same semiconducting substrate, the light emitting device being composed of at least one gallium nitride light emitting diode (LED) with a series of through openings.

Abstract: The invention relates to a skin print sensor (140) comprising, on a supporting substrate, a plurality of elementary acquisition cells (141), each of which includes: a reading node (SN); a first photoelectric or pyroelectric conversion element (PYR) having a first electrode that is connected to the reading node (SN) as well as a second electrode that is connected to a control node (CMD) of the cell; and a third electrode (EL) that is connected to the reading node (SN), is coated with a dielectric layer and is designed to form a capacitance along with the skin of a user; in each cell of said sensor, the control node (CMD) is designed to receive a control signal that initiates reading of a value on the reading node (SN), said value representing the capacitance formed between the third electrode (EL) and the user's skin.

Abstract: The invention relates to a skin print sensor (120) comprising a plurality of elementary acquisition cells (121) which are arranged in and/or on a substrate and each of which includes: a pyroelectric conversion element (PYR) comprising first and second electrodes that are separated by a layer of pyroelectric material, the first electrode being connected to a node (CND) applying a reference potential of the sensor, and the second electrode being connected to a reading node (SN) of the cell; and a third electrode (EL) which is connected to the reading node (SN), is coated with a dielectric layer and is designed to form a capacitance along with the skin of a user.

Abstract: A vessel for storing an object, comprising an electrically insulating container, intended to contain the object and an electrically conductive layer, arranged on a surface of the container. There is a control circuit including an electrically conductive detection element, electrically insulated from the conductive layer and capacitively coupled to the conductive layer. The control circuit is configured to measure the capacitance formed between the conductive layer and an electrically charged object brought close to the conductive layer and to generate a control signal dependent on the measured capacitance.

Abstract: An obturation device (10) intended to obturate an opening (12) of a container (11) comprises a checking system configured to detect any extraction of the obturation device (10) from the opening (12), particularly in case of violation of the obturation device (10). The checking system has at least one sensor (13) determining the value taken by at least one physical quantity representative of a behavior of one of the parts of the obturation device (10) forming a support for the sensor (13), and an electronic processing unit (14) receiving the value of the physical quantity determined by the sensor (13) and modifying a state variable when the value exceeds a predetermined threshold. The modification of the state variable is determined by the electronic processing unit (14). The invention also relates to a container (11) whose opening is obturated by such an obturation device (10).

Abstract: A method of capturing a thermal pattern by a sensor comprising a matrix of several rows and columns of pixels and a plurality of heating elements each associated with a pixel or a group of pixels, and capable of heating a heat sensitive measurement element for measurement of the pixel or each pixel in the group of pixels independently of the other heating elements during reading of the pixel or at least one of the pixels in the group of pixels, in which, when a first pixel or a first group of pixels in the matrix is read, the heat sensitive measurement element of this first pixel or first group of pixels is heated by the heating element associated with this first pixel or first group of pixels, and the heat sensitive measurement element of another pixel called second pixel, or of a second group of pixels, in the matrix is heated by at least one other heating element associated with this second pixel or second group of pixels.

Abstract: Thermal pattern sensor comprising a matrix of several lines and columns of pixels, each pixel comprising at least one pyroelectric capacitance formed by at least one portion of pyroelectric material arranged between a lower electrode and an upper electrode, wherein a first of the lower and upper electrodes forms an electrode for reading the pixel, and moreover comprising a plurality of electrically conductive portions each capable of Joule effect heating, independently of the other electrically conductive portions, of the portions of pyroelectric material of the pyroelectric capacitances of the pixels of at least two adjacent lines of pixels associated with the electrically conductive portion, and arranged facing at least a part of the surface of the reading electrodes of each of the pixels of the lines associated with the electrically conductive portion.

Abstract: The bottle has a neck sealed by a stopper. The safeguarding device (2) comprises a first and a second part (20, 21), the first part (20) being adapted to be integrated in the stopper (1) and the two parts (20, 21) being joined in translation while allowing a limited relative movement of one part with respect to the other when a traction force is applied to the safeguarding device (2) in order to remove said stopper (1) from the neck. According to the invention, the safeguarding device comprises an electrical component (212) disposed so that at least one electrical characteristic of said component is modified during the relative movement of the two parts (20, 21).

Abstract: The invention relates to a print sensor (160) comprising, on a transparent support substrate, a plurality of elementary acquisition cells (161), each cell comprising a photodetector (PS), a pyroelectric conversion element (PYR), and at least one TFT transistor (RT, SF) connected to both the photodetector (PS) and the pyroelectric conversion element (PYR).

Abstract: A sensor of thermal patterns of an object, of papillary print sensor type, including a contact surface to apply the object thereon. The sensor includes at least one capsule sealed under vacuum, arranged between a substrate and the contact surface, suited to exchanging heat with the object and to emitting electromagnetic radiation as a function of its temperature; inside each capsule, at least one bolometric plate, to convert incident electromagnetic radiation into heat; at least one optical filter, to stop electromagnetic radiation in the infrared, each capsule being covered by an optical filter; with reading the electrical resistances of the bolometric plates. Such a print sensor offers both good insulation between the substrate and the sensitive elements, and good mechanical strength.

Abstract: A device for indicating the filling level of a container, including: a first mobile element located inside of the container and capable of moving along a wall of the container when the filling level of the container varies; an enclosure containing a liquid or a gel, located outside of the container on the side of said wall opposite to the first element; and a second mobile element located inside of the enclosure and plunged into said liquid or gel, the second element being magnetically coupled to the first element and being capable of moving in the enclosure along said wall by following the displacements of the first element.

Abstract: A method for displaying an image onto a relief projection surface using a projection system includes the automatic measurement, using a fixed camera, of the distance separating virtual reference frame points projected onto the projection surface, from real reference frame points produced on a three-dimensional screen to set the projection system, acquisition, by the same fixed camera as that used during the setting of the projection system, of an image of a rear face of the three-dimensional screen, identification of the position of a finger in contact with a front face of the three-dimensional screen in the acquired image, and control of an appliance according to the identified position of the finger.