公开(公告)号：US20140306921A1

公开(公告)日：2014-10-16

申请号：US13862562

申请日：2013-04-15

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE. LTD.

Inventor： Kusuma Adi Ningrat

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0412 ,  G06F3/044 ,  G06F2203/04112

Abstract: An in-cell touchscreen panel includes columns of transmit electrodes and rows of sensing electrodes, wherein each row of sensing electrodes comprises a first subset of sensing electrodes coupled to control circuitry via a first subset of receiving traces and a second subset of sensing electrodes coupled to the control circuitry via a second subset of receiving traces. To enable multi-touch functionality, the in-cell touchscreen panel operates in a scanning mode where capacitance is measured at each node where the sensing electrodes intersect the transmit electrodes. During the scanning mode, the control circuitry senses the first and second subsets of receiving traces while applying drive signals to pairs of transmit electrodes. After a drive signal has been applied to each of the transmit electrodes, each of the nodes are measured to detect a capacitance. This capacitance is indicative of a user touch on the in-cell touchscreen panel.

Abstract translation: 单元内触摸屏面板包括发射电极列和感测电极列，其中每行感测电极包括经由接收迹线的第一子集耦合到控制电路的感测电极的第一子集，以及耦合到 控制电路经由接收轨迹的第二子集。 为了实现多点触摸功能，单元内触摸屏面板以扫描模式工作，其中在感测电极与发射电极相交的每个节点处测量电容。 在扫描模式期间，控制电路在将驱动信号施加到发射电极对时感测接收迹线的第一和第二子集。 在将驱动信号施加到每个发射电极之后，测量每个节点以检测电容。 该电容表示用户在单元内触摸屏面板上的触摸。