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公开(公告)号：US11475703B2
公开(公告)日：2022-10-18
申请号：US16998179
申请日：2020-08-20
发明人： Andriy Ryshtun , Viktor Kremin
摘要： A circuit, system, and method for measuring or detecting pressure or force of a fingerprint on an array of electrodes is described. Pressure or force may be measured or detected using a processed image of the fingerprint, or by measurement of capacitance of deformed variable capacitors.
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公开(公告)号：US20200160019A1
公开(公告)日：2020-05-21
申请号：US16515393
申请日：2019-07-18
发明人： Andriy Ryshtun , Oleksandr Rohozin , Viktor Kremin , Oleg Kapshii
IPC分类号： G06K9/00
摘要： A method for detecting a finger at a fingerprint sensor includes detecting a presence of an object at a fingerprint sensor and, in response to detecting the presence of the object, acquiring image data for the object based on signals from the fingerprint sensor. The method further includes, for each subset of one or more subsets of the image data, calculating a magnitude value for a spatial frequency of the subset, and identifying the object as a finger based on comparing the magnitude value to a threshold.
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公开(公告)号：US10579193B2
公开(公告)日：2020-03-03
申请号：US15926175
申请日：2018-03-20
发明人： John Frame , Victor Kremin , Andriy Ryshtun , Dmytro Puyda
摘要： A spatial frequency based capacitive motion sensor and method of operating the same are disclosed. In one embodiment, the motion sensor includes an array of sense cells to capacitively sense capacitance variations induced by a surface in proximity to the array. The motion sensor further includes processing circuitry including a multiplexer and a processor to process motion dependent output signals from the array to measure motion of the surface in a direction parallel to a surface of the array. Generally, processor is adapted to execute a program to control the multiplexer to interconnect the sense cells of the array to configure the array as a comb-filter to detect at least one spatial frequency component of the capacitance variations, and to measure motion of the surface in a direction parallel to the array. Other embodiments are also disclosed.
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公开(公告)号：US20160378227A1
公开(公告)日：2016-12-29
申请号：US15258151
申请日：2016-09-07
发明人： Andriy Ryshtun , Viktor Kremin
CPC分类号： G06F3/044 , G01R27/2605 , G06F3/0416 , G06F2203/04101 , G06F2203/04107 , G06F2203/04108 , H03K17/962 , H03K2017/9613 , H03K2217/960725 , H03K2217/96074 , H03K2217/960745
摘要： A capacitive sensor includes a switching capacitor circuit, a comparator, and a charge dissipation circuit. The switching capacitor circuit reciprocally couples a sensing capacitor in series with a modulation capacitor during a first switching phase and discharges the sensing capacitor during a second switching phase. The comparator is coupled to compare a voltage potential on the modulation capacitor to a reference and to generate a modulation signal in response. The charge dissipation circuit is coupled to the modulation capacitor to selectively discharge the modulation capacitor in response to the modulation signal.
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公开(公告)号：US11549975B2
公开(公告)日：2023-01-10
申请号：US16933659
申请日：2020-07-20
发明人： Andriy Ryshtun , Viktor Kremin
摘要： A capacitive sensor includes a switching capacitor circuit, a comparator, and a charge dissipation circuit. The switching capacitor circuit reciprocally couples a sensing capacitor in series with a modulation capacitor during a first switching phase and discharges the sensing capacitor during a second switching phase. The comparator is coupled to compare a voltage potential on the modulation capacitor to a reference and to generate a modulation signal in response. The charge dissipation circuit is coupled to the modulation capacitor to selectively discharge the modulation capacitor in response to the modulation signal.
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公开(公告)号：US11455817B2
公开(公告)日：2022-09-27
申请号：US16515393
申请日：2019-07-18
发明人： Andriy Ryshtun , Oleksandr Rohozin , Viktor Kremin , Oleg Kapshii
摘要： A method for detecting a finger at a fingerprint sensor includes detecting a presence of an object at a fingerprint sensor and, in response to detecting the presence of the object, acquiring image data for the object based on signals from the fingerprint sensor. The method further includes, for each subset of one or more subsets of the image data, calculating a magnitude value for a spatial frequency of the subset, and identifying the object as a finger based on comparing the magnitude value to a threshold.
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公开(公告)号：US20190087032A1
公开(公告)日：2019-03-21
申请号：US16034138
申请日：2018-07-12
发明人： Andriy Ryshtun , Viktor Kremin
摘要： A capacitive sensor includes a switching capacitor circuit, a comparator, and a charge dissipation circuit. The switching capacitor circuit reciprocally couples a sensing capacitor in series with a modulation capacitor during a first switching phase and discharges the sensing capacitor during a second switching phase. The comparator is coupled to compare a voltage potential on the modulation capacitor to a reference and to generate a modulation signal in response. The charge dissipation circuit is coupled to the modulation capacitor to selectively discharge the modulation capacitor in response to the modulation signal.
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公开(公告)号：US20180025202A1
公开(公告)日：2018-01-25
申请号：US15466670
申请日：2017-03-22
发明人： Andriy Ryshtun , Viktor Kremin , Oleksandr Rohozin , Oleksandr Pirogov , Mykhaylo Krekhovetskyy , Volodymyr Bihday , Roman Ogirko
IPC分类号： G06K9/00
摘要： A method for detecting fingerprint spoof objects includes detecting a presence of the object at a fingerprint sensor and, in response to detecting the presence of the object, measuring a set of physical properties of the object based on one or more signals from a set of electrodes of the fingerprint sensor. The set of physical properties includes at least one of a subdermal compliance of the object and a surface adhesiveness of the object. The method further includes distinguishing the object as an actual finger or a spoof based on the one or more physical properties.
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公开(公告)号：US09218073B1
公开(公告)日：2015-12-22
申请号：US14095930
申请日：2013-12-03
发明人： Viktor Kremin , Andriy Ryshtun , David G. Wright
IPC分类号： G06F3/0354 , G06F3/044
CPC分类号： G06F3/03545 , G06F3/033 , G06F3/0383 , G06F3/041 , G06F3/0414 , G06F3/044 , G06F2203/04104 , G06F2203/04105 , G06F2203/04106 , G06F2203/04107
摘要： An apparatus comprising a stylus with a dynamically switch tip shield is provided. The apparatus includes an elongated stylus housing having an end, a conductive tip disposed at least partially inside the stylus housing and extending from the end, a force sensor coupled to the conductive tip and configured to detect contact between the conductive tip and an object, a tip shield coupled with the stylus housing and extending from the end, and a switch coupled to the tip shield and the conductive tip. The force sensor may be an inductive sensor, a capacitive sensor, a piezo sensor, a force sensing resistor sensor, or an optical sensor.
摘要翻译： 提供一种包括具有动态切换尖端屏蔽的触笔的装置。 该装置包括细长的触针外壳，其具有端部，至少部分地设置在触针外壳内并且从端部延伸的导电尖端，连接到导电尖端并被配置为检测导电尖端和物体之间的接触的力传感器， 与触针壳体耦合并从端部延伸的尖端护罩，以及耦合到尖端护罩和导电尖端的开关。 力传感器可以是电感式传感器，电容传感器，压电传感器，力感测电阻传感器或光学传感器。
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公开(公告)号：US11126310B2
公开(公告)日：2021-09-21
申请号：US16748475
申请日：2020-01-21
发明人： John Frame , Victor Kremin , Andriy Ryshtun , Dmytro Puyda
摘要： A spatial frequency based capacitive motion system and method of operating the same are disclosed. In one embodiment, the system includes an array of sense cells to sense capacitance variations induced by a detected surface in proximity to the array. The system further includes processing circuitry including one or more differential detectors and a processor to process output signals from the one or more differential detectors to measure displacement of the detected surface in a direction parallel to the array. Other embodiments are also disclosed.
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