公开(公告)号：US20220206652A1

公开(公告)日：2022-06-30

申请号：US17565854

申请日：2021-12-30

Applicant: LG Display Co., Ltd.

Inventor： Yang Sik LEE ,  Sang Hyuck BAE

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch display device and a method for driving the same is disclosed. The present disclosure provides a touch display device including a display panel including sub-pixels, a touch sensor including a touch electrode formed electrically in common with an electrode of a light-emitting diode included in the sub-pixels, and a touch driver configured to sense the touch sensor, wherein the electrode of the light-emitting diode serves as the touch electrode for a turn-off period of an emission control transistor for controlling emission of the light-emitting diode.

公开(公告)号：US20240256086A1

公开(公告)日：2024-08-01

申请号：US18384590

申请日：2023-10-27

Applicant: LG DISPLAY CO., LTD.

Inventor： Young Joon LEE ,  Sang Hyuck BAE

IPC: G06F3/041 ,  G06F3/0354

CPC classification number: G06F3/04184 ,  G06F3/03545 ,  G06F3/04162 ,  G06F3/044 ,  G06F2203/04107

Abstract: A touch sensing system may include, for example, pixels for displaying an input image, data lines, touch electrodes, a timing controller for dividing one frame into a display driving period for displaying the input image and a touch driving period for driving the touch electrodes, a stylus pen for receiving a pen uplink signal during the touch driving period and outputting a pen downlink signal, and a touch sensing circuit for causing the pen uplink signal to be radiated to the stylus pen from the data lines during the touch driving period and for sensing voltages of the touch electrodes based on the pen downlink signal. In another example, a touch sensing system may supply the pen uplink signal, which is to be radiated to the stylus pen, using touch electrodes and reference voltage lines during the touch driving period. Methods of driving a touch sensing system are also disclosed.