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公开(公告)号：US11175319B1
公开(公告)日：2021-11-16
申请号：US17025210
申请日：2020-09-18
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick Guedon , Baris Volkan Yildirim , Teerasak Lee
Abstract: A wireless-power-transmission-system includes a bridge with a tank-capacitor coupled thereto, a sense-resistor coupled between the bridge and an input of a regulator, a switching-circuit having first and second inputs coupled across the sense-resistor, and a gain-stage having first and second inputs capacitively coupled to first and second outputs of the switching-circuit. An ADC digitizes output of the gain-stage by comparing the output to a reference voltage, and a temperature-independent current source is coupled to a reference-resistor to generate the reference voltage. In a reset-phase, the switching-circuit shorts the inputs of the gain-stage to one another, and the gain-stage shorts its inputs to its output. The switching-circuit, in a first-chopping-phase, couples the sense-resistor between the first and second inputs of the gain-stage, and in a second-chopping-phase, couples the sense-resistor in reverse between the second and first inputs of the gain-stage. The resistance of the reference-resistor tracks the sense-resistor across temperature.
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公开(公告)号：US11144149B2
公开(公告)日：2021-10-12
申请号：US16902938
申请日：2020-06-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Cam Chung La , Kien Beng Tan
Abstract: A determination is made as to whether touch pressure data acquired from each of a plurality of touch pressure sensors is indicative of abnormal operation. If abnormal operation is indicated, the touch pressure data from each of the plurality of touch pressure sensors, except those touch pressure sensors having touch pressure data indicative of abnormal operation, is summed. Then, the sum is multiplied by a correction factor to produce a touch pressure output indicative of physical force applied to the plurality of touch pressure sensors.
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公开(公告)号：US11093097B2
公开(公告)日：2021-08-17
申请号：US16984344
申请日：2020-08-04
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Youngjin Wang , Tae-gil Kang
Abstract: A data frame in a touch capacitive sensing circuit includes both mutual capacitance data and self capacitance data. The mutual capacitance data and self capacitance data of the frame are filtered to define mutual capacitance and self capacitance islands. Centroids of the mutual capacitance and self capacitance islands are calculated and then processed in a weighted mixing operation to produce a hybrid centroid that more accurately locates the coordinates of a detected touch/hover.
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24.发明授权公开(公告)号：US11086455B2
公开(公告)日：2021-08-10
申请号：US16675950
申请日：2019-11-06
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Abhishek Singh , Hugo Gicquel
Abstract: Disclosed herein is a circuit including a driver circuit applying a received drive signal to a capacitive sensing line of a capacitive touch panel as a boosted drive signal, the driver circuit powered by a boosted supply voltage. A charge pump circuit receives an input supply voltage and output the boosted supply voltage, the charge pump circuit including a voltage sensing circuit to sense the boosted supply voltage and a comparison circuit to compare the sensed boosted supply voltage to a threshold and produce a comparison signal. A control circuit determines a ratio of a pulse width of the comparison signal to the drive signal, and tunes operation of the charge pump circuit to drive the ratio to match a performance threshold.
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25.发明授权公开(公告)号：US11003294B1
公开(公告)日：2021-05-11
申请号：US16893672
申请日：2020-06-05
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Cam Chung La
IPC: G06F3/044 , G06F3/0488 , G06F3/041
Abstract: A touch screen controller (TSC) performs mutual capacitance sensing to acquire touch strength values from a touch matrix formed by capacitively intersecting drive and sense lines. For each sense line, the TSC sums the touch strength values associated therewith to form an emulated value for that sense line, and applies a weighting thereto, the weighting based upon a position of that sense line compared to a location on the touch matrix adjacent which a user's ear is expected to be placed. For each drive line, the TSC sums the touch strength values associated therewith to form an emulated value for that drive line, and applies a weighting thereto, the weighting based upon a position of that drive line compared to the location on the touch matrix adjacent which the user's ear is expected to be placed. The TSC determines presence of the user's based upon the emulated values.
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Patent Agency Ranking
公开(公告)号：US20210091598A1
公开(公告)日：2021-03-25
申请号：US17007225
申请日：2020-08-31
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Eng Jye NG , Chee Weng CHEONG , Huiqiao HE
Abstract: A system comprising includes a wireless power receiver generating a rectified voltage. A low dropout regulator (LDO) generates a first regulated output voltage from the rectified voltage, during a first phase. A first switch couples the first regulated output voltage to a voltage output node during the first phase. During a second phase, the LDO generates a second regulated output voltage from the rectified voltage. A switching regulator generates a third regulated output voltage during the second phase. A second switch couples the third regulated output voltage to the voltage output node during the second phase. During a third phase, the LDO is disabled, while the switching regulator continues to generate the third regulated output voltage. The first switch opens during the third phase while the second switch remains closed.
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公开(公告)号：US10942601B2
公开(公告)日：2021-03-09
申请号：US16532872
申请日：2019-08-06
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Praveesh Chandran , Gee-Heng Loh , Ravi Bhatia , Ys On
Abstract: A capacitive sensing structure includes a first sensing electrode located in a first layer for sensing a first capacitance and producing a first sense signal indicative of the sensed first capacitance. A transmit electrode is located in the first layer and positioned surrounding 90%+ of a perimeter of the first sensing electrode. A second sensing electrode is located in the first layer and positioned surrounding 90%+ of a perimeter of the transmit electrode, the second sensing electrode to sense a second capacitance and produce a second sense signal indicative of the sensed second capacitance. Controller circuitry receives the first and second sense signals, compares a change in the sensed first capacitance to a change in the sensed second capacitance, and produces an output signal indicative of a user touch based upon the comparison between the change in the sensed first capacitance and the change in the sensed second capacitance.
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公开(公告)号：US10936119B2
公开(公告)日：2021-03-02
申请号：US16788417
申请日：2020-02-12
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi Ningrat , Ade Putra
Abstract: A touch screen controller includes driving circuitry coupled to a conductive line through a resistance and drives that conductive line with a driving signal passed through the resistance at a drive frequency. Sensing circuitry is coupled to that conductive line and senses a voltage at that conductive line, the voltage being a function of a capacitance seen by that conductive line. Analog to digital conversion circuitry is coupled to the sensing circuitry and samples the sensed voltage at a sampling frequency to produce samples. Processing circuitry is coupled to the analog to digital conversion circuitry and directly calculates a tangent of a phase shift of the voltage due to the resistance and the capacitance from the samples, and determines a self touch value for that conductive line as a function of the tangent of the phase shift of the voltage.
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29.发明授权公开(公告)号：US10795493B2
公开(公告)日：2020-10-06
申请号：US16011941
申请日：2018-06-19
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Tae-gil Kang , Jay Wang
IPC: G06F3/041 , G06F3/0488 , G06F3/047 , G06F3/044
Abstract: A touch screen controller includes input circuitry receiving touch data from the touch screen. Processing circuitry acquires touch data from the input circuitry in a self-capacitance sensing mode, locates a force island and locates a sense island. A length of the force island and a length of the sense island is calculated. If the length of the force island is greater than a threshold force length and if the length of the sense island is greater than a threshold sense length, then the product of the lengths is calculated, and if greater than a threshold size, designated a valid area. Touch data in the valid area is then acquired in mutual-capacitance sensing mode, and represents palm touch if a maximum strength value in the valid area is less than a maximum area threshold and if a minimum strength value in the valid area is greater than a minimum area threshold.
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公开(公告)号：US10682645B2
公开(公告)日：2020-06-16
申请号：US15960509
申请日：2018-04-23
Inventor： Praveen Kumar Radhakrishnan , Dino Faralli
Abstract: A microfluidic-based sensor, comprising: a semiconductor body, having a first and a second side opposite to one another in a direction; a buried channel, extending within the semiconductor body; a structural layer, of dielectric or insulating material, formed over the first side of the semiconductor body at least partially suspended above the buried channel; and a first thermocouple element, including a first strip, of a first electrical conductive material, and a second strip, of a second electrical conductive material different from the first electrical conductive material, electrically coupled to the first strip. The first thermocouple element is buried in the structural layer and partially extends over the buried channel at a first location. A corresponding manufacturing method is disclosed.
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