US 12,282,620 B2
Touch display driving circuit
Chia-Chi Cheng, Jhubei (TW)
Assigned to Xmyth IP Group Limited, Apia (WS)
Filed by SITRONIX TECHNOLOGY CORP., Jhubei (TW)
Filed on Jul. 17, 2018, as Appl. No. 16/037,296.
Claims priority of provisional application 62/533,199, filed on Jul. 17, 2017.
Prior Publication US 2019/0018542 A1, Jan. 17, 2019
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/0416 (2013.01) [G06F 3/0412 (2013.01); G06F 3/044 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A touch display driving circuit, comprising:
a gate driving circuit, generating a plurality of scan signals;
a source driving circuit, generating a plurality of source signals;
a touch detection circuit, generating a driving signal and detecting a plurality of sensing signals in a touch detection period;
one or more gate current-source, coupled to said gate driving circuit, and outputting one or more current signal according to the levels of said plurality of scan signals in said touch detection period for maintaining the average value of the level of said plurality of scan signals at a predetermined level; and
a voltage supply circuit, producing a first voltage and a second voltage in a display period, and said first voltage lower than said second voltage, said gate driving circuit generating said plurality of scan signals according to said first voltage and said second voltage;
wherein while said one or more gate current-source is outputting said one or more current signal according to the levels of said plurality of scan signals, the output impedance of said one or more gate current-source is huge to increase the impedance of the electrical path transmitting said plurality of scan signals.