公开(公告)号：US10540041B2

公开(公告)日：2020-01-21

申请号：US15405343

申请日：2017-01-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jin-Bong Kim ,  Yoon-Kyung Choi ,  Min-Sung Kim ,  San-Ho Byun ,  Hwi-Taek Chung ,  Eung-Man Kim ,  Cha-Dong Kim

IPC: G06F3/041 ,  G09G3/20 ,  G06F3/044

Abstract: Provided are a touch processor for performing active protection, a touch display driver integrated circuit (DDI) chip including the touch processor, and a method of operating the touch processor. The touch processor for driving a touch panel including a sensing cell includes a driving circuit configured to provide a driving signal to the touch panel, and a capacitance controller. The capacitance controller is configured to generate a switch control signal for controlling a switch connected to a sensing unit included in the sensing cell, and a compensation signal having a different waveform than the driving signal, so as to reduce a value of an ambient capacitance component of the sensing cell.