Patents Assigned to STMicroelectronics Asia Pacific Pte. Ltd.
  • Patent number: 11829558
    Abstract: In an embodiment, a method includes performing a calibration of a first touch cell of a touch screen, where performing the calibration includes: receiving a first code associated with the first touch cell; receiving a second code associated with the first touch cell; determining whether there is an indication of a touch of the touch screen based on the first and second codes; generating a raw code based on the first or second codes; receiving a third code associated with the first touch cell; determining whether the third code matches the raw code; and in response to determining that there is no indication of a touch of the touch screen based on the first and second codes, and that the third code matches the raw code, updating a calibration code associated with the first touch cell based on the raw code or the third code.
    Type: Grant
    Filed: October 6, 2022
    Date of Patent: November 28, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Min Sang Kim, Chan Hyuck Yun, Sang Hoon Jeon, Jeonghee Son, Yun Sang On
  • Patent number: 11822746
    Abstract: A method for operating a display includes receiving a horizontal synchronization (HSYNC) signal from a display driver of the display, the HSYNC signal including a plurality of pulses; measuring a parameter of the HSYNC signal within a frame; and initiating a touch scan on a touch sensing panel of the display based on the measured parameter.
    Type: Grant
    Filed: July 22, 2022
    Date of Patent: November 21, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Min Sang Kim, Kien Beng Tan, Eng Jye Ng, Boon Loong Woo, Tong Tee Tan
  • Patent number: 11816288
    Abstract: A method includes: displaying, an image on a display by sequentially displaying a plurality of frames of the image, the plurality of frames including a first frame and second frame; performing a first noise sampling scan at a plurality of frequencies at a first time location within a first frame; determining a first frequency from the plurality of frequencies with the lowest noise; performing a first mutual sensing scan at the first frequency; performing, a second noise sampling scan at the plurality of frequencies at a second time location within a second frame of the plurality of frames, the second time location being a different frame location than the first time location; determining a second frequency from the plurality of frequencies with the lowest noise, the second frequency being different from the first frequency; and performing, a second mutual sensing scan at the second frequency.
    Type: Grant
    Filed: April 18, 2022
    Date of Patent: November 14, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: MooKyung Kang, Sang Hoon Jeon
  • Patent number: 11798967
    Abstract: An integrated circuit package includes a support substrate having a front side and a back side and an optical integrated circuit die having a back side mounted to the front side of the support substrate and having a front side with an optical sensing circuit. A glass optical element die has a back side mounted to the front side of the optical integrated circuit die over the optical sensing circuit. The mounting of the glass optical element die is made by a layer of transparent adhesive which extends to the cover the optical sensing circuit and a portion of the front side of the optical integrated circuit die peripherally surrounding the optical sensing circuit. An encapsulation material body encapsulates the glass optical element die and the optical integrated circuit die.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: October 24, 2023
    Assignees: STMicroelectronics Asia Pacific Pte Ltd, STMicroelectronics (Grenoble 2) SAS
    Inventors: How Yang Lim, Olivier Zanellato
  • Patent number: 11765006
    Abstract: A device includes an analog to digital converter configured to convert voltages into a digital signal by sampling the voltages at a fixed sampling time; a first multiplier configured to multiply the digital signal with in-phase coefficients, the in-phase coefficients generated to produce a demodulated in-phase signal at a demodulation signal frequency; a first adder configured accumulate the demodulated in-phase signal to output in-phase magnitude values; a second multiplier configured to multiply the digital signal with quadrature coefficients, the quadrature coefficients generated to produce a demodulated quadrature signal at the demodulation signal frequency; and a second adder configured to accumulate the demodulated quadrature signal to output quadrature magnitude values.
    Type: Grant
    Filed: April 30, 2021
    Date of Patent: September 19, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Ade Putra, Kusuma Adi Ningrat, Mythreyi Nagarajan
  • Publication number: 20230275508
    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.
    Type: Application
    Filed: February 25, 2022
    Publication date: August 31, 2023
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Yannick GUEDON, Teerasak LEE
  • Publication number: 20230275502
    Abstract: In a DC-DC converter, a layout is designed to enable utilization the conductive trace connecting the converter output node to an output bump at which the load is attached as a sense resistor. The layout forces the output current down into lower metallization levels of an interconnect layer reaching the converter output node before the output current flows up into this conductive trace and out through the output bump. The conductive trace includes resistive pillars connected in parallel or series between the lower metallization levels and a top metallization layer of the conductive trace, with these resistive pillars being substantially greater in resistance than the lower metallization levels and the top metallization layer of the conductive trace.
    Type: Application
    Filed: February 7, 2023
    Publication date: August 31, 2023
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick GUEDON
  • Publication number: 20230244899
    Abstract: The present disclosure is directed to a contactless card including an actuation security structure that is actuated to provide authorization in accessing identifying information on an integrated circuit within the contactless card. In at least one embodiment, the actuation security structure includes a pair of conductive layers and a pair of electrodes. Ends of the pair of conductive layers overlap respective ones of the pair of electrodes. The ends of the pair of conductive layers are at and in a first elastically deformable region and the respective ones of the pair of electrodes are at and in a second elastically deformable region. An owner of the contactless card may provide authorization to access the identification information on the contactless card by applying force to both the first and second elastically deformable regions inward resulting in the ends of the conductive layers moving into electrical communication with the pair of electrodes.
    Type: Application
    Filed: January 28, 2022
    Publication date: August 3, 2023
    Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
    Inventors: Jaehyun KWAK, Kyoung Min CHO
  • Patent number: 11658518
    Abstract: A wireless power circuit operable in transceiver mode and in Q-factor measurement mode includes a bridge rectifier having first and second inputs coupled to first and second terminals of a coil, and an output coupled to a rectified node. An excitation circuit coupled to the first terminal, in Q-factor measurement mode, drives the coil with a pulsed signal. A protection circuit couples the first terminal to a first node when in Q-factor measurement mode and decouples the first terminal when in transceiver mode. A controller causes the bridge rectifier to short the first and second terminals to ground during Q-factor measurement mode. A sensing circuit amplifies voltage at the first node to produce an output voltage, and in response to the voltage at the first node rising to cross a rising threshold voltage, digitizes the output voltage. The digitized output voltage is used in calculating a Q-factor of the coil.
    Type: Grant
    Filed: August 23, 2021
    Date of Patent: May 23, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Baranidharan Karuppusamy, Thet Mon Sann, Kien Beng Tan, Supriya Raveendra Hegde, Huiqiao He, Teerasak Lee
  • Publication number: 20230135356
    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.
    Type: Application
    Filed: October 28, 2021
    Publication date: May 4, 2023
    Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD
    Inventor: Kien Beng TAN
  • Publication number: 20230104584
    Abstract: An integrated circuit package includes a support substrate having a front side and a back side and an optical integrated circuit die having a back side mounted to the front side of the support substrate and having a front side with an optical sensing circuit. A glass optical element die has a back side mounted to the front side of the optical integrated circuit die over the optical sensing circuit. The mounting of the glass optical element die is made by a layer of transparent adhesive which extends to the cover the optical sensing circuit and a portion of the front side of the optical integrated circuit die peripherally surrounding the optical sensing circuit. An encapsulation material body encapsulates the glass optical element die and the optical integrated circuit die.
    Type: Application
    Filed: October 6, 2021
    Publication date: April 6, 2023
    Applicants: STMicroelectronics Asia Pacific Pte Ltd, STMicroelectronics (Grenoble 2) SAS
    Inventors: How Yang LIM, Olivier ZANELLATO
  • Publication number: 20230099911
    Abstract: A wireless power receiver includes a rectifier with first and second inputs coupled to first and second terminals of a receiver coil, and having a first output coupled to ground and a second output at which a rectified voltage is produced. A first switch is coupled between the second input and ground, and is controlled by a first gate voltage generated at a first node. A second switch is coupled between the first node and ground, and is controlled by a second gate voltage. The first gate voltage closes the first switch to couple the second input to ground when the rectified voltage is less than a threshold voltage, boosting the rectified voltage. The second gate voltage closes the second switch to cause the second gate voltage to be pulled to ground when the rectified voltage is greater than the threshold voltage, limiting the boosting of the rectified voltage.
    Type: Application
    Filed: September 30, 2021
    Publication date: March 30, 2023
    Applicant: STMicroelectronics Asia Pacific Pte Ltd
    Inventors: Chee Weng CHEONG, Kien Beng TAN
  • Patent number: 11609658
    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.
    Type: Grant
    Filed: February 24, 2022
    Date of Patent: March 21, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Sang soo Lee, Chan Hyuck Yun
  • Patent number: 11604541
    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.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: March 14, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Leonard Liviu Dinu
  • Patent number: 11592932
    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.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: February 28, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Sa Hyang Hong, Sang Hoon Jeon, Yun Sang On, Min Sang Kim
  • Patent number: 11586322
    Abstract: A device includes a force driver applying a force signal to a force node associated with a mutual capacitance between the force node and a sense node. A sensing circuit receives a sense signal from the sense node associated with the mutual capacitance between the force node and the sense node, and generates an output indicative of the sensed mutual capacitance. A control circuit controls the generation of the force signal to alternate between at least two different frequencies by generating consecutive pulses, with a given pulse of the consecutive pulses at a first of the at least two different frequencies. In a first operating state, a next pulse immediately succeeding the given pulse is at a second of the at least two different frequencies, and in a second operating state the next pulse immediately succeeding the given pulse is at the first of the at least two different frequencies.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: February 21, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Leonard Liviu Dinu
  • Patent number: 11588344
    Abstract: An over-voltage protection circuit and methods of operation are provided. In one embodiment, a method includes monitoring a voltage at an output of a rectifier, a voltage at an output of a voltage regulator, or a combination thereof. The method further includes determining the over-voltage condition based on the monitoring; and in response to determining the over-voltage condition, regulating the voltage at the output of the rectifier in accordance with a voltage difference between the voltage at the output of the rectifier and the voltage at the output of the voltage regulator.
    Type: Grant
    Filed: July 13, 2021
    Date of Patent: February 21, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventor: Yannick Guedon
  • Patent number: 11581754
    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.
    Type: Grant
    Filed: August 16, 2021
    Date of Patent: February 14, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd
    Inventor: Yannick Guedon
  • Patent number: 11573663
    Abstract: A method for operating an electronic device includes rotating a first portion of a flexible touchscreen with respect to a second portion of the flexible touchscreen around a folding axis; detecting, self-capacitances sensed in a folding area of the flexible touchscreen using a self-sensing scan, where a first side of the folding area is on the first portion of the flexible touchscreen and a second side of the folding area is on the second portion of the flexible touchscreen, and the first side and the second side are separated by a folding axis; determining, a current strength sensed by the flexible touchscreen in the folding area based on the self-capacitances in the folding area; and determining, a folding angle of the first portion of the flexible touchscreen with the second portion of the flexible touchscreen around the folding axis based on the current strength in the folding area.
    Type: Grant
    Filed: January 21, 2022
    Date of Patent: February 7, 2023
    Assignee: STMicroelectronics Asia Pacific Pte Ltd.
    Inventors: Chan Hyuck Yun, Min Sang Kim
  • Patent number: 11509513
    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.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: November 22, 2022
    Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTD.
    Inventor: Yannick Guedon