公开(公告)号：WO2013066993A3

公开(公告)日：2015-06-11

申请号：PCT/US2012062779

申请日：2012-10-31

Applicant: ANALOG DEVICES INC

Inventor： COMPANY BOSCH ENRIQUE ,  MOLINA PEDRO TOMAS ,  CLEARY JOHN ,  CARBAJO GALVE ALBERTO

IPC: G01R29/26

CPC classification number: G06F3/044 ,  G06F3/0418

Abstract: Noise compensation techniques for capacitive touch screen systems. The techniques may include measurement operations that may measure coupled noise frequencies that may be induced on a capacitive touch screen. Noise measurement techniques may include driving a stimulus voltage(s) to a conductor(s) of a capacitive touch screen and sampling return signals from a touch screen conductor(s). Noise measurement techniques may further include sampling ambient return signals from a touch screen conductor(s) in the absence of a stimulus voltage(s). Coupled noise frequencies may also be calculated from a first measured noise frequency. A touch screen control system may use measured or calculated coupled noise frequencies to configure operational parameters that may compensate for the coupled noise during operation of the capacitive touch screen.

Abstract translation: 电容式触摸屏系统的噪声补偿技术。 这些技术可以包括可以测量可能在电容式触摸屏上感应的耦合噪声频率的测量操作。 噪声测量技术可以包括将刺激电压驱动到电容式触摸屏的导体并从触摸屏导体采样返回信号。 噪声测量技术还可以包括在没有刺激电压的情况下从触摸屏导体采样环境返回信号。 也可以从第一测量噪声频率计算耦合噪声频率。 触摸屏控制系统可以使用测量或计算的耦合噪声频率来配置可以补偿电容式触摸屏的操作期间的耦合噪声的操作参数。