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公开(公告)号：US20230275508A1
公开(公告)日：2023-08-31
申请号：US17680666
申请日：2022-02-25
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Yannick GUEDON , Teerasak LEE
CPC classification number: H02M3/07 , H02M1/0009 , H02M3/158
Abstract: Disclosed herein is a wireless power reception system that utilizes a switched capacitor DC-DC voltage converter to charge a load. Current sensing circuits described herein enable the measurement of the input current to the switched capacitor DC-DC voltage converter while being relatively insensitive to temperature variation. Voltage/current sensing circuits described herein enable the selective measurement of load voltage, high side load current, and low side load current. One of the current sensing circuits may be used together with one of the voltage/current sensing circuits in a single device, or the current sensing circuits and voltage/current sensing circuits may be used separately in different devices.
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公开(公告)号：US20230266844A1
公开(公告)日：2023-08-24
申请号：US18171500
申请日：2023-02-20
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Sang soo Lee , Chan Hyuck Yun
IPC: G06F3/041 , G09G3/3208
CPC classification number: G06F3/04166 , G09G3/3208 , G06F3/0446 , G09G2310/0202 , G09G2310/08 , G09G2320/0247
Abstract: A method for operating an electronic device, including: determining that a touchscreen is in a low frequency display (LFD) mode, determining whether a self-sensing scan was performed in a previous frame of a plurality of frames; after determining, a self-sensing scan was performed in the previous frame, determining a current duration of time corresponding to a current frame based on a previous duration of time corresponding to the previous frame, the previous frame being a frame immediately preceding the current frame; determining, whether the current duration of time is greater than the previous duration of time; and after determining that the current duration is greater than the previous duration, performing a self-sensing scan after the current duration of time, the current duration of time being measured from a beginning of the current frame, the current duration of time having a duration less than a duration of the current frame.
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公开(公告)号：US20230135356A1
公开(公告)日：2023-05-04
申请号：US17513570
申请日：2021-10-28
Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
Inventor： Kien Beng TAN
Abstract: An electronic device includes a synchronous rectifier and a battery. The synchronous rectifier outputs a charging current to the battery. The electronic device includes rectifier controller that adjusts a resistance of a switch of the rectifier based on a magnitude of the charging current.
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公开(公告)号：US11604541B2
公开(公告)日：2023-03-14
申请号：US17008248
申请日：2020-08-31
Applicant: STMicroelectronics Asia Pacific Pte Ltd
Inventor： Leonard Liviu Dinu
Abstract: A circuit includes a force driver to apply a force signal to a force node associated with a mutual capacitance to be sensed, and a charge to voltage converter having an input coupled to receive a sense signal from a sense node associated with the mutual capacitance to be sensed. The charge to voltage converter includes an integrator circuit to integrate the sense signal to sense the mutual capacitance, an input switch between the input of the charge to voltage converter and an input of the integrator circuit, and a reset switch between an output of the integrator circuit and the input of the integrator circuit. A control circuit controls generation of the force signal to alternate between at least two different frequencies and generates, for each half cycle of the force signal, a first signal for closing the input switch and a second signal for closing the reset switch.
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公开(公告)号：US11592932B2
公开(公告)日：2023-02-28
申请号：US17201956
申请日：2021-03-15
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Sa Hyang Hong , Sang Hoon Jeon , Yun Sang On , Min Sang Kim
Abstract: A method for operating an electronic device, the method including: displacing a rollable touchscreen to a first position along a first direction, a first side of the rollable touchscreen being mounted in a housing, the rollable touchscreen being configured to be rolled into or unrolled out of the housing along the first direction, detecting an active electrode at a first location on the rollable touchscreen, the active electrode being mounted in the housing, and determining the first position of the rollable touchscreen based on the first location, the first positing being indicative of a fractional amount of the rollable touchscreen outside the housing.
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Patent Agency Ranking
公开(公告)号：US20230035218A1
公开(公告)日：2023-02-02
申请号：US17967449
申请日：2022-10-17
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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公开(公告)号：US11509513B2
公开(公告)日：2022-11-22
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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公开(公告)号：US20220291800A1
公开(公告)日：2022-09-15
申请号：US17201956
申请日：2021-03-15
Applicant: STMicroelectronics Asia Pacific Pte Ltd.
Inventor： Sa Hyang Hong , Sang Hoon Jeon , Yun Sang On , Min Sang Kim
Abstract: A method for operating an electronic device, the method including: displacing a rollable touchscreen to a first position along a first direction, a first side of the rollable touchscreen being mounted in a housing, the rollable touchscreen being configured to be rolled into or unrolled out of the housing along the first direction, detecting an active electrode at a first location on the rollable touchscreen, the active electrode being mounted in the housing, and determining the first position of the rollable touchscreen based on the first location, the first positing being indicative of a fractional amount of the rollable touchscreen outside the housing.
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269.发明授权公开(公告)号：US11416095B2
公开(公告)日：2022-08-16
申请号：US15151247
申请日：2016-05-10
Inventor： Tae-gil Kang , Hang Yin , Cam Chung La
Abstract: An electronic device described herein includes a touch screen for a touch sensitive display carried by a portable housing. The electronic device is configured to operate in a high detection threshold mode to determine whether an object is in contact with the touch sensitive display, and operate in a low detection threshold mode to determine whether the object is adjacent to the touch sensitive display, based on lack of detection of the object being in contact with the touch sensitive display. The electronic device is further configured to determine whether the object is in contact with a peripheral edge of the portable housing by determining whether the object is adjacent opposite sides of the touch sensitive display, based on detection of the object being adjacent to the touch sensitive display.
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公开(公告)号：US11387676B2
公开(公告)日：2022-07-12
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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