公开(公告)号：US20190018542A1

公开(公告)日：2019-01-17

申请号：US16037296

申请日：2018-07-17

Applicant: SITRONIX TECHNOLOGY CORP.

Inventor： CHIA-CHI CHENG

IPC: G06F3/041

Abstract: The present invention discloses a touch display driving circuit, which generates a plurality of scan signals and a plurality of source signals for driving a touch display panel to display images. The touch display driving circuit further comprises a touch detection circuit and one or more current-source. The touch detection circuit detects a plurality of sensing signals of the touch display panel in a touch detection cycle for detecting touches on the touch display panel. The one or more current-source outputs one or more current signal in the touch detection cycle for maintaining the average values of the levels of the plurality of scan signals or the average values of the levels of the plurality of source signal at a predetermined level and maintaining the display electrodes of the touch display panel floating. Thereby, in the touch detection cycle, the parasitic capacitance effect between the touch electrodes and the display electrodes of the touch display panel can be reduced and thus enhancing the touch sensitivity thereof.