US 12,032,797 B2
Input sensing device and display device with sampling of sensing signal to reduce noise
Choon Hyop Lee, Yongin-si (KR); Jang Hui Kim, Yongin-si (KR); Jae Won Kim, Yongin-si (KR); and In Nam Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Gyeonggi-Do (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Dec. 23, 2022, as Appl. No. 18/145,971.
Application 18/145,971 is a continuation of application No. 17/217,204, filed on Mar. 30, 2021, granted, now 11,537,252.
Claims priority of application No. 10-2020-0104909 (KR), filed on Aug. 20, 2020.
Prior Publication US 2023/0140300 A1, May 4, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01); H10K 59/40 (2023.01)
CPC G06F 3/0446 (2019.05) [G06F 3/0412 (2013.01); G06F 3/04184 (2019.05); G06F 3/0445 (2019.05); H10K 59/40 (2023.02)] 21 Claims
OG exemplary drawing
 
1. An input sensing device comprising:
an input sensing panel which includes electrodes;
a driving signal generator which provides driving signals to the electrodes; and
a sensing unit which receives sensing signals according to the driving signals from the electrodes,
wherein the driving signals include a first driving signal and a second driving signal which have different frequencies,
wherein the sensing unit samples a first sensing signal according to the first driving signal and a second sensing signal according to the second driving signal at a same frequency,
wherein a first sensing value generated by sampling the first sensing signal during a reference time duration is different from a second sensing value generated by sampling the second sensing signal during the reference time duration, and
wherein attenuation of the first driving signal and the first sensing signal is compensated by a difference between the first sensing value and the second sensing value.