公开(公告)号：US10120509B2

公开(公告)日：2018-11-06

申请号：US14982349

申请日：2015-12-29

Applicant: STMICROELECTRONICS ASIA PACIFIC PTE LTD

Inventor： Praveesh Chandran ,  Lokesh Kumar Korapati ,  Mythreyi Nagarajan

IPC: G06F3/044 ,  G06F3/041 ,  G06F11/00

Abstract: The present disclosure is directed to a system and method to remove common mode noise projected onto a touch sensor array from a display. The system is configured to activate two rows of electrodes at the same time, while coupling remaining rows of electrodes to ground. A first one of the two activated rows is used for detection of a touch and a second one of the two activated rows is used to detect common mode noise from the display. The common mode noise detected by the second row is removed from signals received from a plurality of columns of the touch sensor array.

公开(公告)号：US09675368B2

公开(公告)日：2017-06-13

申请号：US14272455

申请日：2014-05-07

Applicant: STMicroelectronics Asia Pacific PTE LTD

Inventor： Dianbo Guo ,  Praveesh Chandran ,  Lokesh Kumar Korapati

IPC: G06F3/041 ,  A61B17/22 ,  A61B18/24 ,  A61B18/26 ,  A61H23/00 ,  G06F3/044

CPC classification number: A61B17/22022 ,  A61B18/245 ,  A61B18/26 ,  A61B2017/22051 ,  A61B2017/22079 ,  A61H23/008 ,  G06F3/0416 ,  G06F3/044 ,  G06F2203/04108

Abstract: A touch panel includes a plurality of drive lines, a plurality of orthogonal sense lines, and a plurality of sensors. A method of controlling the touch panel to detect touches includes simultaneously applying a drive signal to each of a group of drive lines of the touch panel. Each of the drive signals is applied to a corresponding drive line in the group during a time slot and all the applied drive signals having the same electrical characteristics over the time slot. The method includes sensing sense signals generated on the sense lines in response to the applied drive signals and processing the sense signals to detect touches of the touch panel.