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公开(公告)号：US20230013804A1
公开(公告)日：2023-01-19
申请号：US17374560
申请日：2021-07-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Tae-gil Kang , Sung Kyu Kim , Sa Hyang Hong , Chang Woo Lee
Abstract: In an example, a display device includes a rollable display including a display side and an opposite non-display side. The rollable display includes a conductive material with a pattern disposed on the non-display side. The device includes a housing configured to house the rollable display and configured to roll in and roll out the rollable display along a first direction, and a capacitive sensor including a transmitter and a receiver electrode disposed within the housing and configured to sense the pattern.
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公开(公告)号：US11496185B2
公开(公告)日：2022-11-08
申请号：US17024270
申请日：2020-09-17
Inventor： Wenhe Zhao , Jiasheng Wang
Abstract: A method for modulating a signal including operating a circuit in a first arrangement during a first operating interval and switching the circuit between the first arrangement and a second arrangement during a first modulation interval to vary a load on the circuit to produce a first amplitude shift keying (ASK) signal. The method further includes detecting a voltage on the circuit crossing a threshold level and operating the circuit in the second arrangement during a second operating interval. The method also includes switching the circuit between the second arrangement and the first arrangement during a second modulation interval to vary the load on the circuit to produce a second ASK signal.
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公开(公告)号：US20220140744A1
公开(公告)日：2022-05-05
申请号：US17576120
申请日：2022-01-14
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON
Abstract: A bridge rectifier and associated control circuitry collectively form a “regtifier” which rectifies an input time varying voltage and regulates the rectified output voltage produced without the use of a traditional voltage regulator. To accomplish this, the gate voltages of transistors of the bridge rectifier that are on during a given phase may be modulated via analog control (to increase the on-resistance of those transistors) or via pulse width modulation (to turn off those transistors prior to the end of the phase). The transistors of the bridge rectifier that would otherwise be off during a given phase may be turned on to help dissipate excess power and thereby regulate the output voltage. This modulation is based upon both a voltage feedback signal and a current feedback signal.
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公开(公告)号：US20220091164A1
公开(公告)日：2022-03-24
申请号：US17492210
申请日：2021-10-01
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON , Baris Volkan YILDIRIM , Teerasak LEE
Abstract: A circuit includes a tank capacitor coupled between first and second nodes, and a sense resistor having a first terminal coupled to the first node and a second terminal coupled to a regulator input. A switching circuit has first and second inputs coupled to the first and second terminals of the sense resistor. A gain stage has first and second inputs capacitively coupled to first and second outputs of the switching circuit. An analog-to-digital converter receives the output of the gain stage, and receives first and second differential voltages. A reference voltage generator has a temperature independent current source coupled to source current to a reference resistor, the first differential reference voltage being formed across the reference resistor. The reference resistor and sense resistor are located sufficiently close to one another on a single common substrate such that they remain at substantially a same temperature.
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公开(公告)号：US20220085848A1
公开(公告)日：2022-03-17
申请号：US17024270
申请日：2020-09-17
Inventor： Wenhe Zhao , Jiasheng Wang
Abstract: A method for modulating a signal including operating a circuit in a first arrangement during a first operating interval and switching the circuit between the first arrangement and a second arrangement during a first modulation interval to vary a load on the circuit to produce a first amplitude shift keying (ASK) signal. The method further includes detecting a voltage on the circuit crossing a threshold level and operating the circuit in the second arrangement during a second operating interval. The method also includes switching the circuit between the second arrangement and the first arrangement during a second modulation interval to vary the load on the circuit to produce a second ASK signal.
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Patent Agency Ranking
公开(公告)号：US20210377084A1
公开(公告)日：2021-12-02
申请号：US17402108
申请日：2021-08-13
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Yannick Guedon
Abstract: A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
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27.发明申请公开(公告)号：US20210091655A1
公开(公告)日：2021-03-25
申请号：US17011439
申请日：2020-09-03
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Supriya Raveendra HEGDE , Yannick GUEDON
Abstract: A high-side switching transistor of a rectifier circuit is driven by a high-side driver circuit to supply current to an output node. The high-side driver circuit is powered between a capacitive bootstrap node and the output node. A boot charge circuit charges the bootstrap capacitor by supplying current to the bootstrap node. The boot charge circuit includes: a first current path that selectively supplies a first charging current to the bootstrap node when the rectifier circuit is operating in a switching mode; and a second current path that selectively supplies a second charging current to the bootstrap node when the rectifier circuit is operating in a reset mode.
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公开(公告)号：US20210091597A1
公开(公告)日：2021-03-25
申请号：US17004689
申请日：2020-08-27
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Supriya Raveendra HEGDE , Chee Weng CHEONG
Abstract: A wireless power receiving circuit includes a transistor based rectifier receiving an AC input voltage, and control logic receiving an overvoltage signal. The control logic generates control signals for controlling turn on of transistors within the transistor based rectifier based upon the overvoltage signal so as to cause the transistor based rectifier to produce a rectified output voltage from the AC input voltage. A comparator compares the rectified output voltage to a reference voltage and asserts the overvoltage signal if the rectified output voltage is greater than the reference voltage. In response to assertion of the overvoltage signal, the control logic asserts the control signals to simultaneously turn on all transistors of the transistor based rectifier.
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公开(公告)号：US20210088567A1
公开(公告)日：2021-03-25
申请号：US17016963
申请日：2020-09-10
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON , Teerasak LEE , Supriya Raveendra HEGDE
Abstract: A receiver circuit includes a rectifier operable in full-, half-synchronous and asynchronous modes. A measurement circuit, with method, provides for real-time power measurement within the rectifier. The measurements are made based on the average output current from the rectifier delivered to the load and measurements sampled over time of the instantaneous voltage at each input/output node of the rectifier. Equivalent resistance in the rectifier is determined from the measurements and power dissipation calculated from the determined equivalent resistance and the average output current. The instantaneous voltages are synchronously captured through high-voltage AC coupling in order to detect the voltage drop across each element of the rectifier. The sensed voltages are amplified in the low voltage domain and converted by a high-speed analog-to-digital converter in order to produce data useful in computing equivalent resistance values. From these values, power dissipation within the rectifier is calculated and real-time equivalent resistance is available.
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公开(公告)号：US10775927B2
公开(公告)日：2020-09-15
申请号：US16055922
申请日：2018-08-06
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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