US 12,223,142 B2
Touch sensing device and touch sensing method
Young Eun Lee, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX SEMICON CO., LTD., Daejeon (KR)
Filed on Nov. 15, 2023, as Appl. No. 18/509,988.
Claims priority of application No. 10-2022-0152512 (KR), filed on Nov. 15, 2022.
Prior Publication US 2024/0160319 A1, May 16, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04186 (2019.05) [G06F 3/0446 (2019.05)] 21 Claims
OG exemplary drawing
 
1. A touch sensing device comprising:
a first circuit configured to supply a driving signal to a touch electrode of a panel;
a second circuit configured to sense a change in capacitance of the touch electrode; and
a third circuit including:
a touch signal processor configured to generate sensing data including a sensing value for each touch node based on the sensed capacitance change;
a coordinate calculator configured to calculate a touch presence and a touch coordinate based on the sensing data; and
a touch determiner configured to determine a user touch as either a normal touch or a grip touch based on a touch ratio between touch nodes placed on each of a plurality of lines of the panel and a touch area,
wherein the touch determiner includes:
a touch area determiner configured to determine the touch area based on the touch coordinate, wherein the touch area has a first touch area, a second touch area located around the first touch area, and a third touch area placed between the first touch area and the second touch area; and
a ratio calculator configured to calculate the touch ratio between touch nodes placed on each of at least two lines among the plurality of lines when the touch coordinate is located within the third touch area.