US 11,966,534 B2
Touch driving circuit and touch display device for reducing noise of touch sensing signal according to display driving
DaeUk Jeong, Daejeon (KR)
Assigned to LG DISPLAY CO., LTD., Seoul (KR)
Filed by LG DISPLAY CO., LTD., Seoul (KR)
Filed on Mar. 15, 2022, as Appl. No. 17/695,288.
Application 17/695,288 is a division of application No. 16/944,708, filed on Jul. 31, 2020, granted, now 11,307,709.
Claims priority of application No. 10-2019-0134261 (KR), filed on Oct. 28, 2019.
Prior Publication US 2022/0206659 A1, Jun. 30, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01); H10K 50/84 (2023.01); H10K 59/131 (2023.01); H10K 59/40 (2023.01)
CPC G06F 3/04166 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0446 (2019.05); H10K 50/84 (2023.02); H10K 59/131 (2023.02); H10K 59/40 (2023.02); G06F 2203/04112 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A touch display device, comprising:
a plurality of X-touch electrode lines disposed in a first direction;
a plurality of Y-touch electrode lines disposed in a second direction; and
a touch driving circuit configured to:
drive the plurality of X-touch electrode lines and the plurality of Y-touch electrode lines during divided periods of one sensing unit period in a first touch sensing mode,
drive X-touch electrode lines of a first group of the plurality of X-touch electrode lines during a first period and remaining X-touch electrode lines of a second group of the plurality of X-touch electrode lines during a second period, and
drive all of the plurality of Y-touch electrode lines simultaneously in a remaining period except for the first period and the second period in the sensing unit period,
wherein a number of all channels driving the plurality of X-touch electrode lines is more than a number of channels driving the plurality of Y-touch electrode lines,
wherein the first period and the second period are time-divided, and
wherein the touch driving circuit does not drive the remaining X-touch electrode lines of the second group of the plurality of X-touch electrode lines during the first period, the touch driving circuit does not drive the X-touch electrode lines of the first group of the plurality of X-touch electrode lines during the second period.