公开(公告)号：US11366546B2

公开(公告)日：2022-06-21

申请号：US17115545

申请日：2020-12-08

Applicant: LG Display Co., Ltd.

Inventor： SeungJae Lee ,  JinHo Kim

IPC: G06F3/041 ,  G09G3/36 ,  G06F3/044

Abstract: A touch display apparatus is disclosed, which includes a display panel on which pixels and touch electrodes are disposed, a main power integrated circuit generating a common voltage signal applied to the touch electrodes and at least one gate voltage signal applied to the pixels, a touch power integrated circuit outputting a touch driving signal of a pulse type in accordance with a touch synchronization signal that defines a display driving period and a touch driving period, outputting a load free driving signal of the pulse type by using a gate low voltage signal of the at least one gate voltage signal, and outputting at least one pseudo touch driving signal corresponding to a pulse patterns of the touch driving signal and the load free driving signal and having reverse phase which is inverted, by using at least one gate high voltage signal of the at least one gate voltage signal, and a gate driving circuit supplying a gate pulse based on the at least one gate voltage signal to gate lines connected to the pixels for the display driving period, and supplying the load free driving signal to the gate lines for the touch driving period.