公开(公告)号：US09886136B2

公开(公告)日：2018-02-06

申请号：US15189647

申请日：2016-06-22

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jun Chul Park ,  Bum Soo Kim ,  Kyeong Gon Lee ,  Cha Dong Kim ,  San Ho Byun ,  Jin Chul Lee ,  Yoon Kyung Choi

IPC: G06F3/045 ,  G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0418 ,  G06F3/044

Abstract: A touch screen controller controlling a capacitive touch screen includes a first comparator that compares a reference signal with a sensing signal, and generates a first output signal. The capacitive touch screen includes capacitive touch sensors connected to a sensing line and a drive line, and that sense a touch event. The sensing signal is output from the sensing line. The touch screen controller further includes a filter that generates a second output signal by integrating the first output signal in each sensing cycle of the filter, an analog-to-digital converter that converts the second output signal to a digital signal, and a controller that determines at least one of whether a noise is generated and whether the touch event is generated based on a reference digital signal and the digital signal, and that adjusts the number of the sensing cycles of the filter based on a result of the determination.