公开(公告)号：US10156935B2

公开(公告)日：2018-12-18

申请号：US15189528

申请日：2016-06-22

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Kyeong-gon Lee ,  Bum-soo Kim ,  Jun-chul Park ,  Yoon-kyung Choi ,  San-ho Byun ,  Cha-dong Kim ,  Jin-chul Lee

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

Abstract: A touch screen controller is provided. The touch screen controller includes: an offset cancellation circuit configured to cancel offset capacitance of a touch screen panel including a first channel and a second channel crossing the first channel, the offset cancellation circuit connected to the touch screen panel through a sensing node; a charge amplifier configured to generate a sensing voltage from a sensing signal output from the touch screen panel, the charge amplifier including an amplifier having a first input terminal connected to the sensing node and a second input terminal to which an input voltage is applied; and a channel driver configured to provide a driving voltage, which is equal to or greater than the input voltage, to the second channel in a self capacitance sensing mode for the first channel.