公开(公告)号：US20160188084A1

公开(公告)日：2016-06-30

申请号：US14807740

申请日：2015-07-23

Applicant: Qualcomm Technologies, Inc.

Inventor： Guozhong Shen ,  Bart DeCanne ,  Kenneth Knox ,  Muhammad Umair ,  Syed Ahmad

IPC: G06F3/041 ,  G06F3/047 ,  G01R31/02 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G01R31/028 ,  G06F3/0418 ,  G06F3/044 ,  G06F3/047

Abstract: A capacitive touch panel is tested for the presence or absence of short and open circuits in drive and sense lines without the use of a tool that touches the surface of the panel. During a first stage of testing, drive lines of the touch panel are sequentially driven while the remaining drive lines are floated. Sense lines are read to indicate whether a driven drive line is shorted to an adjacent drive line, an open circuit, or coupled to a sense line that is an open circuit. During a second stage of testing, drive lines are driven while alternate sense lines are floated or enabled. The signals on the enabled sense lines are acquired to indicate whether the enabled sense lines are shorted to adjacent sense lines. This second stage can be repeated, switching the roles of the sense lines, to determine the locations of short and/or open circuits.

Abstract translation: 测试电容式触摸屏在驱动和感测线路中存在或不存在短路和开路，而不使用接触面板表面的工具。 在第一阶段的测试期间，依次驱动触摸面板的驱动线，而剩余的驱动线是漂浮的。 读取感测线以指示从动驱动线是否短路到相邻的驱动线，开路或耦合到作为开路的感测线。 在第二阶段测试期间，驱动线被驱动，而备用感测线被浮动或启用。 获取启用的感测线上的信号以指示启用的感测线是否与相邻感测线短接。 可以重复该第二阶段，切换感测线的角色，以确定短路和/或开路的位置。