US 11,989,373 B2
Signal compensation circuit for compensating unwanted electrical activity on touch sensors, touch control circuit, and display device
Feng-Wei Lin, Tainan (TW); Yu-Chieh Hsu, Tainan (TW); and Long Chen, Shenzhen (CN)
Assigned to JADARD TECHNOLOGY INC., Shenzhen (CN)
Filed by JADARD TECHNOLOGY INC., Shenzhen (CN)
Filed on Sep. 13, 2021, as Appl. No. 17/472,909.
Claims priority of application No. 202110421108.8 (CN), filed on Apr. 19, 2021.
Prior Publication US 2022/0334703 A1, Oct. 20, 2022
Int. Cl. G06F 3/041 (2006.01); H03K 17/687 (2006.01)
CPC G06F 3/04186 (2019.05) [H03K 17/6871 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A signal compensation circuit, comprising:
a first compensation circuit electrically connected to a plurality of sensors and a charging-discharging node, the first compensation circuit being configured to receive a plurality of initial signals from the plurality of sensors, generate a plurality of first charging currents to charge the charging-discharging node in a charging period, and generate a plurality of first discharging currents to discharge the charging-discharging node in a discharging period, the charging period and the discharging period do not overlap with each other; and
a second compensation circuit electrically connected to the charging-discharging node, the second compensation circuit being configured to generate a plurality of second charging currents to charge the charging-discharging node in the charging period and generate a plurality of second discharging currents to discharge the charging-discharging node in the discharging period;
wherein values of the plurality of first charging currents are greater than values of the plurality of second charging currents,
values of the plurality of first discharging currents are greater than value of the plurality of second discharging currents,
the values of the plurality of first charging currents, the plurality of second charging currents, the plurality of first discharging currents, and the plurality of second discharging currents are configured to determine a plurality of compensation values, and
the charging-discharging node is configured to output a plurality of target signals, the plurality of target signals are obtained by compensating the plurality of initial signals with the plurality of compensation values.