US 12,265,678 B2
Touch event processing circuit
Jia-Ming He, Tainan (TW); Yaw-Guang Chang, Tainan (TW); and Yi-Yang Tsai, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Apr. 11, 2024, as Appl. No. 18/633,472.
Application 18/633,472 is a continuation of application No. 17/994,405, filed on Nov. 28, 2022, granted, now 11,977,705.
Application 17/994,405 is a continuation in part of application No. 17/727,830, filed on Apr. 25, 2022, granted, now 11,620,023, issued on Apr. 4, 2023.
Prior Publication US 2024/0256082 A1, Aug. 1, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/0418 (2013.01) [G06F 3/0446 (2019.05)] 8 Claims
OG exemplary drawing
 
1. A touch event processing circuit comprising:
a plurality of receiving circuits, wherein each of the plurality of receiving circuits comprises:
an operation amplifier comprises:
an input terminal arranged to receive an input signal, wherein the input signal comprises a voltage sensing signal from a touch panel;
an output terminal, coupled to the input terminal of the operation amplifier; and
an output stage, arranged to output a plurality of current signals;
a current processing circuit, arranged to process the plurality of current signals according to a plurality of current average signals, respectively, to generate a processed current signal; and
a touch event detection circuit, arranged to detect a touch event according to the processed current signal; and
an average circuit, coupled to the current processing circuit and the output stage of the operation amplifier in each of the plurality of receiving circuits, and arranged to perform multiple average operations upon a plurality of received current signals, respectively, to generate the plurality of current average signals, wherein the plurality of current signals are comprised in the plurality of received current signals.