Patent ID: 11914810
Assignee: LG DISPLAY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A touch display device comprising:
a display panel having a built-in touch screen panel including a plurality of touch electrodes;
a gate driving circuit configured to supply a gate signal to a plurality of gate lines;
a data driving circuit configured to supply a data voltage to a plurality of data lines; and
a touch circuit configured to supply a touch driving signal to the display panel and sense a pen touch of an active stylus,
wherein the gate driving circuit comprises a first gate driving circuit configured to supply a first gate signal to a first part of the plurality of gate lines in a first display period in which the touch circuit supplies the touch driving signal to the display panel for sensing the pen touch of the active stylus in a touch period, and a second gate driving circuit configured to supply a second gate signal to a second part of the plurality of gate lines in a second display period in which the touch circuit supplies the touch driving signal to the display panel for sensing the pen touch of the active stylus,
wherein the display panel is configured to transmit a beacon signal for the active stylus in a beacon period which does not overlap with the first display period and the second display period,
wherein the first display period and the second display period are included in one frame period,
wherein each of the first and second display periods and the touch period simultaneously occur, and
wherein the beacon period is located between the first display period and the second display period.