公开(公告)号：US11068094B2

公开(公告)日：2021-07-20

申请号：US16657338

申请日：2019-10-18

Applicant: LG Display Co., Ltd.

Inventor： HongJu Lee ,  HyeongWon Kang ,  Youngwoo Jo

IPC: G06F3/044 ,  G06F3/041 ,  G02F1/1333 ,  G02F1/1343 ,  G02F1/1362 ,  G09G3/36

Abstract: The present embodiments may provide a touch display device including: a display panel in which a plurality of data lines, a plurality of gate lines, and a plurality of touch electrodes are disposed; a gate-driving circuit configured to drive the plurality of gate lines; a data-driving circuit configured to drive the plurality of data lines; and a touch-driving circuit configured to drive the plurality of touch electrodes while the plurality of data lines and the plurality of gate lines are driven. In this touch display device, while a touch-driving signal swings with a predetermined amplitude, a data signal and a gate signal may also swing with the predetermined amplitude. According to the present embodiments, it is possible to enable high-speed image display and high-speed touch sensing, to perform a display operation and a touch operation simultaneously, and to display an image normally without any image change.

公开(公告)号：US10955951B2

公开(公告)日：2021-03-23

申请号：US16719006

申请日：2019-12-18

Applicant: LG DISPLAY CO., LTD.

Inventor： HongJu Lee ,  HyeongWon Kang ,  Youngwoo Jo

IPC: G06F3/041 ,  G06F3/044 ,  G09G3/36 ,  G06F3/047 ,  G02F1/1333 ,  G02F1/1362

Abstract: A touch display device, a common driving circuit, and a driving method are discussed. The touch display device can include a common driving circuit configured to drive a plurality of common electrodes used for display driving and touch driving, wherein the common driving circuit can include a common signal stabilization amplifier configured to control the average of a first input signal and a second input signal, which are respectively received from a first common electrode and a second common electrode, to correspond to a reference common signal and to output a first control input signal and a second control input signal; and a differential amplifier configured to output a differential sensing signal that is proportional to the difference between the first control input signal and the second control input signal. Accordingly, the impact of display driving and touch driving on each other when simultaneously performing the display driving and the touch driving can be reduced.