公开(公告)号：US20160085262A1

公开(公告)日：2016-03-24

申请号：US14961761

申请日：2015-12-07

Applicant: Apple Inc.

Inventor： Thomas James WILSON ,  Richard James REEVE

IPC: G06F1/12 ,  G06F3/041

CPC classification number: G06F1/12 ,  G06F3/0412 ,  G06F3/0416

Abstract: Touch sensing can be accomplished using master/slave touch controllers that transmit drive signals to a touch surface and process sense signals including superpositions resulting from master/slave drive signals. The master/slave can drive and sense different sets of lines, respectively, of the touch surface. A communication link between master/slave can be established by transmitting a clock signal between master/slave, transmitting a command including sequence information to the slave, and initiating a communication sequence from the clock signal and sequence information. The slave can receive/transmit communications from/to the master during first/second portions of the communication sequence, respectively. Touch sensing operations can be synchronized between master/slave by transmitting a command including phase alignment information from master to slave, and generating slave clock signals based on the clock signal and the phase alignment information, such that sense signal processing by master clock signals are in-phase with sense signal processing by slave clock signals.

Abstract translation: 可以使用将驱动信号传输到触摸表面的主/从触摸控制器来实现触摸感测，并且处理由主/从驱动信号引起的叠加的感测信号。 主/从机可以分别驱动和感测触摸面的不同的线组。 主/从机之间的通信链路可以通过在主机/从机之间发送时钟信号，向从机发送包括序列信息的命令，以及从时钟信号和序列信息发起通信序列来建立。 从机可以在通信序列的第一/第二部分分别接收/发送与主机的通信。 通过发送包括从主机到从机的相位对准信息的命令，以及基于时钟信号和相位对准信息产生从时钟信号，可以在主/从机之间同步触摸感测操作，使得主时钟信号的感测信号处理 通过从时钟信号进行感测信号处理。