US 12,260,047 B2
Touch sensing device and touch sensing method
Youngeun Lee, Daejeon (KR); Chinwan Lee, Daejeon (KR); and Sangmin Choi, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX SEMICON CO., LTD., Daejeon (KR)
Filed on Aug. 2, 2023, as Appl. No. 18/364,076.
Claims priority of application No. 10-2022-0096665 (KR), filed on Aug. 3, 2022.
Prior Publication US 2024/0045548 A1, Feb. 8, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04184 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0446 (2019.05); G06F 3/04186 (2019.05)] 17 Claims
OG exemplary drawing
 
1. A touch sensing device comprising:
a receiving circuit configured to receive a first sensing value generated in a differential mode using a first input signal provided to a first sensing electrode and a second input signal provided to a second sensing electrode;
a noise determination circuit configured to receive a reference sensing value generated using the second input signal and determining an amount of a noise of the first sensing value using the reference sensing value, and
a filter circuit configured to filter the first sensing value,
wherein the noise determination circuit is configured to adjust a filter coefficient of the filter circuit according to the amount of the noise, and
wherein the reference sensing value is generated based on a difference between the second input signal and a preset reference signal.