US 11,914,810 B2
Driving circuit, touch display device and driving method thereof
HoonBae Kim, Seoul (KR); SungChul Kim, Gyeonggi-do (KR); SunYeop Kim, Seoul (KR); and Seongkyu Kang, Gyeonggi-do (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Jan. 12, 2022, as Appl. No. 17/574,017.
Application 17/574,017 is a continuation of application No. 16/882,363, filed on May 22, 2020, granted, now 11,249,582.
Claims priority of application No. 10-2019-0068977 (KR), filed on Jun. 11, 2019.
Prior Publication US 2022/0137769 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/0354 (2013.01)
CPC G06F 3/04162 (2019.05) [G06F 3/03545 (2013.01); G06F 3/0412 (2013.01)] 19 Claims
OG exemplary drawing
 
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.