公开(公告)号：US09104267B2

公开(公告)日：2015-08-11

申请号：US14088533

申请日：2013-11-25

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kwang-Ho Choi ,  Sang-Woo Kim ,  Chang-Ju Lee

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/0418 ,  G06F3/044 ,  G06F2203/04104

Abstract: A capacitive multi-touch system includes a touch sensor pane, a front-end circuit, and a digital signal processor. The touch sensor panel generates a capacitance signal corresponding to a touch input. The front-end circuit converts the capacitance signal to a sensing channel signal. The digital signal processor receives a common voltage (VCOM) from a display device, calculates a noise interval of two neighboring noise peaks of the common voltage, and performs a noise filtering operation on the sensing channel signal using a noise filter path. The noise filter path is selected from a plurality of noise filter paths based on the noise interval.

Abstract translation: 电容式多点触摸系统包括触摸传感器窗格，前端电路和数字信号处理器。 触摸传感器面板产生对应于触摸输入的电容信号。 前端电路将电容信号转换为感测通道信号。 数字信号处理器从显示装置接收公共电压（VCOM），计算公共电压的两个相邻噪声峰值的噪声间隔，并使用噪声滤波器路径对感测通道信号执行噪声滤波操作。 基于噪声间隔从多个噪声滤波器路径选择噪声滤波器路径。