公开(公告)号：US20230125866A1

公开(公告)日：2023-04-27

申请号：US17964780

申请日：2022-10-12

Applicant: LG Display Co., Ltd.

Inventor： HyunWoo Jang

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch display device and a touch sensing system are disclosed. When a touch controller transmits or receives data to or from a plurality of touch driving circuits through a common line, the touch driving circuit that does not transmit a sensing completion signal to the touch controller may identify whether a malfunctioned state occurs based on an operation state when a read command is received from the touch controller and may transmit transformed sensing data to the touch controller. Accordingly, the touch controller easily identifies the malfunctioned state of the touch driving circuit and performs control according to a type of the malfunctioned state, thereby preventing or reducing the performance degradation of touch sensing due to a malfunction of the touch driving circuit.

公开(公告)号：US10824272B2

公开(公告)日：2020-11-03

申请号：US16212590

申请日：2018-12-06

Applicant: LG DISPLAY CO., LTD.

Inventor： HyunWoo Jang ,  SuWon Lee

IPC: G06F3/041 ,  G06F3/044

Abstract: A touch display device includes a touch panel on which a plurality of touch electrodes is disposed; and a touch circuit configured to output a touch driving signal of a pulse type to the touch panel and to sense occurrence of touch or a touch position according to a touch synchronization signal for defining a touch period, wherein the touch circuit is configured to receive the sensing data to sense occurrence of touch or a touch position and to determine whether the touch driver malfunctions, and to output a simplified initialization command to the touch driver when it is determined that the touch driver malfunctions, and the touch driver is initialized with a pre-stored set value maintained not changed upon receiving the simplified initialization command.