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    CAPACITIVE DISCHARGE CIRCUIT FOR TOUCH SENSITIVE SCREEN
    53.
    发明申请
    CAPACITIVE DISCHARGE CIRCUIT FOR TOUCH SENSITIVE SCREEN 审中-公开

    公开(公告)号：US20170344158A1

    公开(公告)日：2017-11-30

    申请号：US15679771

    申请日：2017-08-17

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Chee Weng Cheong ,  Dianbo Guo ,  Kien Beng Tan ,  Yannick Guedon

    IPC: G06F3/044 ,  G06F3/041

    CPC classification number: G06F3/044 ,  G06F3/041 ,  G06F3/0418

    Abstract: A capacitive discharge circuit includes a line having a capacitance, a switched capacitor circuit including a capacitor, a switched circuit coupled to the line, and a voltage regulator coupled between the switched capacitor circuit and the switched circuit. A controller operates the switched capacitor circuit and switched circuit to in a first phase, charge the capacitor by coupling the capacitor between a common mode and a power supply, and in a second phase, discharge the capacitor by coupling the voltage regulator in series with the capacitor between the power supply node a ground. The controller is also configured to in a third phase, charge the capacitor by coupling the capacitor between the common mode and the power supply, and in a fourth phase, share charge between the line and the capacitor by coupling the voltage regulator and the capacitor in series between the line and the ground.

    Cross hatch ITO sensor pattern for touchscreens
    54.
    发明授权
    Cross hatch ITO sensor pattern for touchscreens 有权

    公开(公告)号：US09791985B2

    公开(公告)日：2017-10-17

    申请号：US14803190

    申请日：2015-07-20

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Praveesh Chandran ,  Ravi Bhatia

    IPC: G06F3/044 ,  H05K1/02 ,  H05K1/09

    CPC classification number: G06F3/044 ,  G06F2203/04111 ,  H05K1/0296 ,  H05K1/09

    Abstract: In one implementation, a capacitive sensing structure comprises rows of first sensors electrically coupled together and columns of second sensors electrically coupled together, wherein the first sensors include: a first arm extending in a first direction and having a first plurality of finger structures extending therefrom, a second arm extending in the first direction and having a second plurality of finger structures extending therefrom, and an end portion connecting the arms, wherein the first sensors define open regions that are occupied by the second sensors. In a second implementation, a capacitive sensing structure comprises rows of first sensors and columns of second sensors, wherein each of the first sensors includes an elongated portion having finger structures extending therefrom, and wherein each of the second sensors includes a primary portion connected to secondary portions via arms, wherein the secondary portions occupy gaps defined by the finger structures of the first sensors.

    FREQUENCY HOPPING FOR A CAPACITIVE TOUCH SCREEN CONTROLLER
    55.
    发明申请
    FREQUENCY HOPPING FOR A CAPACITIVE TOUCH SCREEN CONTROLLER 审中-公开

    公开(公告)号：US20170139501A1

    公开(公告)日：2017-05-18

    申请号：US14944433

    申请日：2015-11-18

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Leonard Liviu Dinu

    IPC: G06F3/044

    Abstract: A circuit includes a force driver configured to apply a force signal to a force node associated with a mutual capacitance to be sensed. A sensing circuit receives a sense signal from a sense node associated with said mutual capacitance to be sensed. The sensing circuit operates to generate an output signal indicative of the sensed mutual capacitance. A control circuit controls generation of the force signal to alternate between at least two different frequencies and generate said output signal for each half cycle of the force signal.

    CAPACITIVE TOUCH SCREEN WITH TIME OVERLAPPED CONCURRENT SCANNING OPERATION USING CODED DRIVE SIGNALS
    59.
    发明申请
    CAPACITIVE TOUCH SCREEN WITH TIME OVERLAPPED CONCURRENT SCANNING OPERATION USING CODED DRIVE SIGNALS 审中-公开
    使用编码驱动信号的时间叠加同时扫描操作的电容触摸屏

    公开(公告)号：US20160313823A1

    公开(公告)日：2016-10-27

    申请号：US14693211

    申请日：2015-04-22

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Kien Beng Tan

    IPC: G06F3/044

    CPC classification number: G06F3/044 ,  G06F3/0416

    Abstract: A capacitive sensing system includes a capacitive sensing panel with drive lines and sense lines. Each drive line includes a drive circuit. A code generator operates to generate modulation codes. A drive controller generates drive signals wherein each drive signal is modulated by one of the modulation codes. The generated drive signals are applied to the drive lines through the drive circuits. The drive controller operates to simultaneously generate the drive signals for application to a corresponding group of drive lines during a drive period. Separate groups of drive lines are sequentially driven with the same drive signals during drive periods that only partially overlap.

    Abstract translation: 电容感测系统包括具有驱动线和感测线的电容式感测面板。 每个驱动线包括驱动电路。 码发生器用于产生调制码。 驱动器控制器产生驱动信号，其中每个驱动信号由调制码之一调制。 所产生的驱动信号通过驱动电路施加到驱动线。 驱动控制器操作以在驱动周期期间同时产生用于施加到相应组的驱动线的驱动信号。 在仅部分重叠的驱动周期期间，用相同的驱动信号依次驱动单独的驱动线组。

    Enhanced inductive sense using mutual inductance
    60.
    发明授权
    Enhanced inductive sense using mutual inductance 有权
    增强感应感应使用互感

    公开(公告)号：US09379650B2

    公开(公告)日：2016-06-28

    申请号：US14248784

    申请日：2014-04-09

    Applicant: STMicroelectronics Asia Pacific Pte Ltd

    Inventor： Wei Seng Chew ,  Wei Xiong

    IPC: H02P6/18 ,  H02P21/14 ,  H02P6/22

    CPC classification number: H02P6/186 ,  H02P6/182 ,  H02P6/185 ,  H02P6/22

    Abstract: Methods and apparatus for determining rotor position in a motor including a rotor and stator windings. The method includes measuring inductive sense values for each pair of the stator windings by performing an inductive sense routine on the motor, measuring stator winding voltage values, induced by mutual inductance between windings, for each of the stator windings by performing a mutual inductance sensing routine on the motor, and determining the rotor position based on the inductive sense values and the stator winding voltage values.

    Abstract translation: 用于确定包括转子和定子绕组的电动机中的转子位置的方法和装置。 该方法包括通过在电机上执行电感检测程序来测量每对定子绕组的感应感应值，通过执行互感感测程序测量每个定子绕组，测量由绕组之间的互感引起的定子绕组电压值 并且基于感应感应值和定子绕组电压值来确定转子位置。

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