公开(公告)号：US20150256329A1

公开(公告)日：2015-09-10

申请号：US14199210

申请日：2014-03-06

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Chee Weng CHEONG ,  Leonard Liviu DINU ,  Dianbo GUO ,  Kien Beng TAN

IPC: H04L7/033 ,  G06F3/0354 ,  H04L7/00 ,  G06F3/041

CPC classification number: G06F3/03545 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0416 ,  G06F2203/0384 ,  H04L2027/0097

Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals. Further, the detection window duration and start times may be adjusted based on previously detected (or undetected) synchronization signals in order to compensate for noise overshadowing synchronization signals.

Abstract translation: 一种用于同步彼此通信的两个设备的系统和方法。 当要建立两个设备之间的通信时，可以调用同步过程。 在一个实施例中，第一设备可以启动发送具有上升沿和下降沿对的同步信号。 第二设备可以包括被配置为接收同步信号的控制器。 然而，噪声可能会阻碍控制器正确接收和/或解释同步信号的能力。 噪声可能导致检测部件误检测噪声作为同步信号，或者可能导致检测部件错过实际同步信号的检测。 可以使用窗口生成器来生成用于控制器的比较窗口以检测同步信号。 此外，可以基于先前检测到的（或未检测到的）同步信号来调整检测窗口持续时间和开始时间，以便补偿遮挡同步信号的噪声。

公开(公告)号：US20190204979A1

公开(公告)日：2019-07-04

申请号：US16220500

申请日：2018-12-14

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Cam Chung LA ,  Kien Beng TAN

IPC: G06F3/041 ,  H03K17/96

Abstract: A device includes a touch and pressure sensitive screen having touch pressure sensors and a controller. The controller acquires touch pressure data from the plurality of touch pressure sensors. For each touch pressure sensor, the controller determines whether the touch pressure data from that touch pressure sensor is indicative of abnormal operation of that touch pressure sensor. Where no abnormal operation is indicated, the controller sums the touch pressure data from each of the touch pressure sensors to produce a touch pressure output. Where abnormal operation is indicated, the controller sums the touch pressure data from each of the touch pressure sensors and multiply the sum by a correction factor to produce the touch pressure output.

公开(公告)号：US20220103019A1

公开(公告)日：2022-03-31

申请号：US17408824

申请日：2021-08-23

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Baranidharan KARUPPUSAMY ,  Thet Mon SANN ,  Kien Beng TAN ,  Supriya Raveendra HEGDE ,  Huiqiao HE ,  Teerasak LEE

IPC: H02J50/60 ,  H02J50/12

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.

公开(公告)号：US20230099911A1

公开(公告)日：2023-03-30

申请号：US17490437

申请日：2021-09-30

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Chee Weng CHEONG ,  Kien Beng TAN

IPC: H02J50/10 ,  H02M7/219 ,  H02M3/156 ,  H02M1/00 ,  G01R19/165 ,  H03K17/687 ,  H02J7/04 ,  H02J50/90

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.

公开(公告)号：US20180232071A1

公开(公告)日：2018-08-16

申请号：US15953017

申请日：2018-04-13

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Chee Weng CHEONG ,  Leonard Liviu DINU ,  Dianbo GUO ,  Kien Beng TAN

IPC: G06F3/0354 ,  G06F3/041 ,  G06F3/038 ,  H04L27/00

CPC classification number: G06F3/03545 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0416 ,  G06F2203/0384 ,  H04L2027/0097

Abstract: A system and method for synchronizing two devices in communication with each other. When communication between the two devices is to be established, a synchronization process may be invoked. In an embodiment, a first device may initiate sending synchronization signals having rising edge and falling edge pairs. The second device may include a controller configured to receive the synchronization signals. However, noise may inhibit the ability of the controller to correctly receive and/or interpret the synchronization signals. Noise may cause detection components to falsely detect noise as a synchronization signal or may cause detection components to miss detection of an actual synchronization signal. A window generator may be used to generate comparison windows for the controller to detect synchronization signals. Further, the detection window duration and start times may be adjusted based on previously detected (or undetected) synchronization signals in order to compensate for noise overshadowing synchronization signals.

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

IPC: H02M7/219 ,  H02J7/06 ,  H02J7/00 ,  H02J50/10

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.

公开(公告)号：US20200310583A1

公开(公告)日：2020-10-01

申请号：US16902938

申请日：2020-06-16

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Cam Chung LA ,  Kien Beng TAN

IPC: G06F3/041 ,  H03K17/96

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.

公开(公告)号：US20150277649A1

公开(公告)日：2015-10-01

申请号：US14231408

申请日：2014-03-31

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Kien Beng TAN

IPC: G06F3/041 ,  G06F3/0488

CPC classification number: G06F3/0416 ,  G06F1/1694 ,  G06F3/0488 ,  G06F3/04883 ,  G06F2203/04108

Abstract: According to one embodiment of the present disclosure, a touch controller is adapted to be coupled to a touch screen and to a motion sensor. The touch controller is operable in response to a signal from the motion sensor indicating a first motion to switch from a hover event sensing mode of operation to a gesture event sensing mode of operation. In one embodiment, the touch controller is operable in the hover event sensing mode of operation to detect a first hover event and is thereafter operable, in response to the signal from the motion sensor indicating a first motion has occurred, to switch to the gesture event sensing mode of operation and detect a first gesture event.

Abstract translation: 根据本公开的一个实施例，触摸控制器适于耦合到触摸屏和运动传感器。 触摸控制器可操作以响应于来自运动传感器的信号，指示从悬停事件感测操作模式切换到手势事件感测操作模式的第一运动。 在一个实施例中，触摸控制器可操作在悬停事件感测操作模式中，以检测第一悬停事件，此后可响应于来自运动传感器的指示已经发生第一动作的信号而切换到手势事件 感测操作模式并且检测第一手势事件。