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Patent Agency Ranking
公开(公告)号：US09710690B1
公开(公告)日：2017-07-18
申请号：US15407617
申请日：2017-01-17
Applicant: Fingerprint Cards AB
Inventor： David Carling , Robert Hägglund , Emil Hjalmarson , Peter Nygren , Erik Säll
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06K9/00087
Abstract: A fingerprint sensing system comprising a device connection interface, and a sensing arrangement including sensing structures, a read-out circuitry connected the sensing structures, and a sensing arrangement controller for controlling the sensing arrangement between at least a first sensing arrangement operational mode and a second sensing arrangement operational mode. The system further comprising supply circuitry connected to the sensing arrangement, and comprising a supply circuitry controller for controlling the supply circuitry between a first supply circuitry operational mode and a second supply circuitry operational mode in which modes different supply power is provided to the sensing arrangement. The supply circuitry controller transitions the supply circuitry between its modes in response to a power state signal indicative of a future transition of the sensing arrangement from the first operational mode to the second operational mode.
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公开(公告)号：US09977945B2
公开(公告)日：2018-05-22
申请号：US15464680
申请日：2017-03-21
Applicant: Fingerprint Cards AB
Inventor： Karl Lundahl , Robert Hägglund , Emil Hjalmarson , Rolf Sundblad , Christer Jansson
CPC classification number: G06K9/0002 , G06F3/0412 , G06F2203/0338 , G06F2203/04103 , G06K9/00087
Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.
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公开(公告)号：US09953204B2
公开(公告)日：2018-04-24
申请号：US15399124
申请日：2017-01-05
Applicant: Fingerprint Cards AB
Inventor： Rolf Sundblad , Emil Hjalmarson , Erik Säll , Allan Olsson , Klaas-Jan De Langen
CPC classification number: G06K9/0002 , G06K9/00087 , G06K9/03 , H02M3/07
Abstract: A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.
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公开(公告)号：US20170351895A1
公开(公告)日：2017-12-07
申请号：US15464680
申请日：2017-03-21
Applicant: Fingerprint Cards AB
Inventor： Karl Lundahl , Robert Hägglund , Emil Hjalmarson , Rolf Sundblad , Christer Jansson
IPC: G06K9/00
CPC classification number: G06K9/0002 , G06F3/0412 , G06F2203/0338 , G06F2203/04103 , G06K9/00087
Abstract: There is provided a capacitive fingerprint sensing device for sensing a fingerprint pattern of a finger, said capacitive fingerprint sensing device comprising: a protective top layer to be touched by said finger; a first metal layer comprising a two-dimensional array of sensing structures arranged underneath said top layer; a second metal layer, arranged underneath said first metal layer, comprising a plurality of conductive structures a dielectric layer arranged between the first and second metal layers to electrically insulate the first metal layer from the second metal layer, the dielectric layer comprising a low-k material; and readout circuitry arranged underneath said second metal layer and coupled to each of the electrically conductive sensing structures by means of via connections to receive a sensing signal indicative of a distance between said finger and said sensing structure. There is also provided a method for manufacturing such a device.
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公开(公告)号：US20170308730A1
公开(公告)日：2017-10-26
申请号：US15399124
申请日：2017-01-05
Applicant: Fingerprint Cards AB
Inventor： Rolf Sundblad , Emil Hjalmarson , Erik Säll , Allan Olsson , Klaas-Jan De Langen
CPC classification number: G06K9/0002 , G06K9/00087 , G06K9/03 , H02M3/07
Abstract: A fingerprint sensing system comprising a device connection interface including a device reference potential input, a sensing arrangement, and sensing reference potential providing circuitry. The sensing arrangement includes multiple sensing structures and read-out circuitry connected to each of the sensing structures. The sensing reference potential providing circuitry provides a sensing reference potential to the sensing arrangement in the form of a sensing reference signal alternating between a first sensing reference potential and a second sensing reference potential, and comprises a first capacitor; a second capacitor; charging circuitry; and switching circuitry for alternatingly switching the sensing reference potential providing circuitry between a first state in which the first capacitor and the second capacitor are connected in parallel to the charging circuitry; and a second state in which the first capacitor and the second capacitor, when charged, are connected in series between the device reference potential input and the sensing arrangement.
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