US 11,656,729 B2
Touch sensor controller, operating method of touch sensor controller, and touch screen driving circuit
Junchul Park, Daegu (KR); Jonghee Na, Hwaseong-si (KR); Gwangho Nam, Hwaseong-si (KR); Taekon Yu, Hwaseong-si (KR); Hyunwook Lim, Seoul (KR); Woohyuk Jang, Hwaseong-si (KR); Bumsoo Kim, Hwaseong-si (KR); Byunghwee Park, Hwaseong-si (KR); Wongab Jung, Hwaseong-si (KR); and Yoon-Kyung Choi, Seongnam-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 1, 2022, as Appl. No. 17/590,008.
Claims priority of application No. 10-2021-0016284 (KR), filed on Feb. 4, 2021.
Prior Publication US 2022/0244812 A1, Aug. 4, 2022
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01)
CPC G06F 3/0445 (2019.05) [G06F 3/0412 (2013.01); G06F 3/0418 (2013.01); G06F 3/0446 (2019.05); G06F 3/04164 (2019.05); G06F 3/04166 (2019.05)] 12 Claims
OG exemplary drawing
 
1. A touch sensor controller for driving a touch sensor that is stacked on a display panel and includes driving electrodes and receiving electrodes crossing the driving electrodes, the touch sensor controller comprising:
a driving circuit configured to sequentially provide driving signals to the driving electrodes;
a read-out circuit configured to, in response to the driving signals, generate touch data based on first sensing signals received from the receiving electrodes and generate display noise data based on a second sensing signal received from a first driving electrode to which a driving signal of the driving signals is not applied from among the driving electrodes;
a touch processor configured to determine whether a touch input has occurred on the touch sensor based on the touch data and the display noise data;
first receivers respectively connected to the receiving electrodes to receive the first sensing signals;
a second receiver connected to the first driving electrode to receive the second sensing signal;
wherein:
the second receiver includes a second current amplifier including a first input terminal and a second input terminal,
the second sensing signal is applied from the first driving electrode to the first input terminal of the second current amplifier, and
a third sensing signal is received at the second input terminal of the second current amplifier from a second driving electrode to which the driving signal is not applied from among the driving electrodes.