US 11,740,737 B2
Touch display device, touch driving circuit and touch driving method thereof
Seongkyu Kang, Paju-si (KR); SungChul Kim, Paju-si (KR); HoonBae Kim, Seoul (KR); and SunYeop Kim, Seoul (KR)
Assigned to LG Display Co., Ltd., Seoul (KR)
Filed by LG Display Co., Ltd., Seoul (KR)
Filed on Oct. 21, 2021, as Appl. No. 17/507,631.
Claims priority of application No. 10-2020-0182548 (KR), filed on Dec. 23, 2020.
Prior Publication US 2022/0197474 A1, Jun. 23, 2022
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); G09G 3/20 (2006.01)
CPC G06F 3/04184 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0448 (2019.05); G06F 3/04166 (2019.05); G09G 3/20 (2013.01); G09G 2310/0291 (2013.01); G09G 2310/0297 (2013.01); G09G 2310/08 (2013.01)] 24 Claims
OG exemplary drawing
 
1. A touch display device comprising:
a display panel including a plurality of touch electrodes;
a display driving circuit configured to supply scan signals to the display panel through a plurality of gate lines; and
a touch driving circuit configured to perform a touch sensing operation according to capacitance variations of the plurality of touch electrodes, and supply at least one compensated common voltage with a waveform for counterbalancing at least one distorted common voltage based upon structures and shapes of the plurality of touch electrodes to the plurality of the touch electrodes according to time of the at least one distorted common voltage transmitted through a plurality of touch lines in order to reduce a distortion of a common voltage during an overlapping period where adjacent scan signals are overlapped in a display driving period.