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公开(公告)号：US11422036B2
公开(公告)日：2022-08-23
申请号：US16923589
申请日：2020-07-08
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
摘要： Method for capturing a thermal pattern by a sensor comprising a plurality of pixels each comprising a heat-sensitive measuring element, the method comprising, for each pixel: heating the measuring element; first reading of the electrical charges outputted by the pixel during a first measurement duration and giving a first measurement value x1; second reading of the electrical charges outputted by the pixel during a second measurement duration and giving a second measurement value x2; calculating a difference x1−α·x2, where α is a positive real number, and wherein more than half of the heating duration is implemented during the first measurement duration and less than half of the heating duration is implemented during the second measurement duration.
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公开(公告)号：US20190148618A1
公开(公告)日：2019-05-16
申请号：US16186926
申请日：2018-11-12
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
摘要： A method produces a matrix of pixels of a thermal sensor, suitable for passive addressing. The matrix of pixels includes a layer including a first series of electrically conducting strips, forming charge collection macro-electrodes; a layer including a pyroelectric material; and a layer including a second series of electrically conducting strips, forming heating strips. The method includes a step of transfer of one on the other of a first and a second elementary stack, the first elementary stack including the first series of strips, and the second elementary stack including the second series of strips. This method makes it possible to relax the manufacturing constraints of the series of strips.
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公开(公告)号：US10949638B2
公开(公告)日：2021-03-16
申请号：US16542236
申请日：2019-08-15
申请人： IDEMIA IDENTITY & SECURITY FRANCE , COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
摘要： The invention relates to a manufacturing process of a pixel array of a thermal pattern sensor comprising the steps of: providing a substrate; depositing a first layer of electrically conductive material, including depositing electrically conductive tracks, depositing of connector pins and depositing a ground strip; depositing of second layer of pyroelectric material covering the tracks and leaving at least part of the connector pins free; depositing of third layer of electrically conductive material; depositing of fourth layer of dielectric material in contact with the third layer; depositing of a fifth layer including electrically conductive heating tracks; depositing of a sixth protective layer, wherein the step of depositing the second and/or third and/or fourth and/or sixth layer is carried out by slot-die coating.
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4.发明授权公开(公告)号：US10591360B2
公开(公告)日：2020-03-17
申请号：US16041233
申请日：2018-07-20
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
IPC分类号： G01J5/34 , A61B5/1172 , G06K9/00
摘要： 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.
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公开(公告)号：US10580956B2
公开(公告)日：2020-03-03
申请号：US16186926
申请日：2018-11-12
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
摘要： A method produces a matrix of pixels of a thermal sensor, suitable for passive addressing. The matrix of pixels includes a layer including a first series of electrically conducting strips, forming charge collection macro-electrodes; a layer including a pyroelectric material; and a layer including a second series of electrically conducting strips, forming heating strips. The method includes a step of transfer of one on the other of a first and a second elementary stack, the first elementary stack including the first series of strips, and the second elementary stack including the second series of strips. This method makes it possible to relax the manufacturing constraints of the series of strips.
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公开(公告)号：US10474864B2
公开(公告)日：2019-11-12
申请号：US15662805
申请日：2017-07-28
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
IPC分类号： G06K9/00 , A61B5/1172 , G01J5/04 , G01J5/34
摘要： There is provided a method of capturing a thermal pattern by a sensor including a matrix of several rows and columns of pixels, and heating elements, each heating element associated with at least one pixel, and configured to heat a heat sensitive measurement element for measurement of the pixel independently of other heating elements during reading of the pixel, the method including, during a reading of at least one first pixel, the heat sensitive measurement element of the at least one first pixel is heated by a heating element associated with the at least one first pixel, and also during the reading, the heat sensitive measurement element of at least one second pixel is heated by at least one other heating element associated with the at least one second pixel, the at least one second pixel being read before or after the reading of the at least one first pixel.
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公开(公告)号：US10381387B2
公开(公告)日：2019-08-13
申请号：US15922204
申请日：2018-03-15
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
摘要： 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.
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公开(公告)号：US20180269240A1
公开(公告)日：2018-09-20
申请号：US15922204
申请日：2018-03-15
申请人： COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES , IDEMIA IDENTITY & SECURITY FRANCE
IPC分类号： H01L27/146 , G06K9/00 , H05B33/08
CPC分类号： H01L27/14609 , G06K9/00013 , G06K9/00026 , G06K9/0004 , G06K9/20 , G06K9/2054 , G06K9/4661 , H01L27/14643 , H01L27/14678 , H01L27/3234 , H05B33/0803
摘要： 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.
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公开(公告)号：US11101423B2
公开(公告)日：2021-08-24
申请号：US16714859
申请日：2019-12-16
IPC分类号： H01L37/02
摘要： Method for manufacturing a device comprising a stack including a first layer comprising electrical conductors electrically insulated from each other, a second electrically conducting layer, a third layer of pyroelectric material, said third layer being arranged between the first layer and the second layer, said method comprising, a) producing said stack on a substrate, the material of the third layer not being pyroelectric at this stage, b) producing a polarisation layer made of epoxy glue in electrical contact with the electrical conductors in the first layer, c) applying polarisation voltage to said third layer such that its material becomes pyroelectric, d) exposing the polarisation layer in its second state by ultraviolet radiation so as to make it at least partly electrically insulating.
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公开(公告)号：US10908427B2
公开(公告)日：2021-02-02
申请号：US16579327
申请日：2019-09-23
摘要： A system for vision in virtual reality or augmented reality is provided, in a support to be mounted on a head of a user, the system including a matrix of light-emission elements extending according to a display surface for display of images configured to be seen by the user; an optical projection system to form an image of the elements on a focusing surface at a distance from an eye of the user; a matrix of photo-detectors to acquire an image of a region of the eye extending according to a capture surface and arranged coplanar with the elements and at least partially overlapping with the capture surface and the display surface; and a computer to receive as an input the image acquired, and to process the same to deduce a parameter relative to the user, the optical projection system being a variable-focal-length optical system.
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