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公开(公告)号：US20210391752A1
公开(公告)日：2021-12-16
申请号：US17403060
申请日：2021-08-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON
Abstract: A method of wirelessly transmitting power includes: causing a power transmission circuit to transmit, to a master power reception circuit, a portion of power it is capable of transmitting; adjusting operation of a slave power reception unit until a first rectified voltage produced by the master power reception circuit and a second rectified voltage produced by the slave power reception unit are equal; causing the power transmission circuit to transmit additional power to the slave power reception unit, resulting in the first and second rectified voltages being unequal; and adjusting operation of the slave power reception unit until the first and second rectified voltages are again equal. A dummy load is connected to the slave power reception unit prior to causing the power transmission circuit to transmit the additional power, and is disconnected once the first and second rectified voltages are equal.
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102.发明申请公开(公告)号：US20210382576A1
公开(公告)日：2021-12-09
申请号：US17230317
申请日：2021-04-14
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Kusuma Adi NINGRAT , Cam Chung LA
IPC: G06F3/044 , G06F3/041 , G06F3/0488
Abstract: A touch-screen-controller (TSC) performs mutual sensing to acquire touch strength values from a touch matrix formed by capacitively intersecting conductive lines. For each line, the TSC generates an emulated self capacitance value from an associated touch strength value based upon a position of that line compared to a location on the touch matrix adjacent to which a first touch type is expected to occur, and determines presence of the first touch type adjacent to the touch matrix based upon the emulated values. The emulated values for each conductive line may be weighted based upon its closeness to the location where the first touch type is expected to occur. The weighting may be zero if its associated conductive line is outside of the location where the first touch type is expected to occur, and may be one if inside of the location where the first touch type is expected to occur.
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公开(公告)号：US11196301B1
公开(公告)日：2021-12-07
申请号：US17124174
申请日：2020-12-16
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Teerasak Lee
Abstract: A bridge rectifier is formed by a first transistor coupled between a regulator output and a first tap, a second transistor coupled between the regulator output and a second tap, a third transistor coupled between the first tap and ground, and a fourth transistor coupled between the second tap and ground. A first comparator circuit, when enabled, compares ground to a voltage at the first tap and asserts a first low-side control signal to turn on the third transistor when the voltage at the first tap is below ground, and, when reset, samples an offset of the first comparator circuit. A second comparator circuit, when enabled, compares ground to a voltage at second first tap and asserts a second low-side control signal to turn on the fourth transistor when the voltage at the second tap is below ground, and, when reset, samples an offset of the second comparator circuit.
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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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105.发明授权公开(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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Patent Agency Ranking
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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107.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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108.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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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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