US 12,405,690 B2
Touch driving device for driving touch panel
Jeong Kwon Nam, Daejeon (KR); Yeon Ju Yu, Daejeon (KR); and Jin Yoon Jang, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX SEMICON CO., LTD., Daejeon (KR)
Filed on Nov. 6, 2023, as Appl. No. 18/503,029.
Claims priority of application No. 10-2022-0147010 (KR), filed on Nov. 7, 2022.
Prior Publication US 2024/0152232 A1, May 9, 2024
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/0412 (2013.01); G06F 3/044 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A touch driving device comprising:
a first channel circuit configured to supply a plurality of first touch driving pulses having a curved waveform in accordance with a first RC time constant to a first touch electrode, and generate touch sensing data for the first touch electrode according to a response signal for the plurality of first touch driving pulses; and
a second channel circuit configured to supply a plurality of second touch driving pulses having a curved waveform in accordance with a second RC time constant to a second touch electrode, and generate touch sensing data for the second touch electrode according to a response signal for the plurality of second touch driving pulses,
wherein the first channel circuit is configured to generate an auxiliary signal having the curved waveform in accordance with the first RC time constant using a driving support circuit configured of a voltage source and a resistive element.