公开(公告)号：US09891761B2

公开(公告)日：2018-02-13

申请号：US14206293

申请日：2014-03-12

Applicant: Samsung Electronics Co., Ltd.

Inventor： Byeoung Hak Jo ,  Moon Suk Jeong ,  Yong Il Kwon ,  Tah Joon Park

IPC: G06F3/044 ,  G06F3/041

CPC classification number: G06F3/044 ,  G06F3/0416 ,  G06F2203/04111

Abstract: There are provided a touch sensing device and a touchscreen device. The touch sensing device includes: a driving circuit applying a driving signal having a predetermined first period to a node capacitor; a buffer circuit converting capacitance of the node capacitor into a voltage signal; a buffer capacitor being charged and discharged depending on an output voltage from the buffer circuit; and an integration circuit integrating voltages charged in the buffer capacitor, wherein, in a normal touch mode, the buffer circuit integrates capacitance of the node capacitor to generate the voltage signal, and, in a proximity touch mode, the buffer circuit generates the voltage signal by following the voltages charged in the node capacitor.