Touch display device and driving method thereof

Abstract

Provided is a touch display device, which includes a touch display substrate and a driving circuit, the touch display substrate includes a plurality of data lines and a plurality of common electrodes,the common electrode is multiplexed into a touch driving electrode in a touch control stage, each common electrode corresponds to a data line, and the driving circuit is used for supplying a displaysignal to the data line in a display stage and supplying a touch signal to the data line corresponding to the common electrode in a touch control stage. The touch display substrate further comprises agating unit corresponding to the common electrode one by one, wherein the gating unit is connected with a corresponding common electrode, a data line corresponding to the common electrode and a common signal terminal, and is used for transmitting a touch signal on the data line to the common electrode in the touch control stage; and conducting the common electrode with the common signal terminalin a display stage. The invention also provides a driving method of a touch display device. The invention can reduce the phenomenon of short circuit between signal wires.

Description

technical field [0001] The present invention relates to the field of touch display, in particular to a touch display device and a driving method thereof. Background technique [0002] At present, in many touch display devices, a time-division multiplexing method is used for touch and display, that is, a common voltage signal is provided to the common electrodes in the display phase, and a touch driving signal is provided to the common electrodes in the touch phase. figure 1 is a structural schematic diagram of an existing touch display substrate, which adopts a self-capacitance structure, such as figure 1 As shown, the touch display substrate 10 includes a plurality of common electrodes 11, and each common electrode 11 is connected to the drive circuit 20 through a touch signal line TXL; at the same time, the thin film transistors in each column of pixels are connected to each other through a data line Data The driving circuits 20 are connected together, which leads to the ...

AI Technical Summary

Problems solved by technology

figure 1 is a structural schematic diagram of an existing touch display substrate, which adopts a self-capacitance structure, such as figure 1 As shown, the touch display substrate 10 includes a plurality of common electrodes 11, and each common electrode 11 is connected to the drive circuit 20 through a touch signal line TXL; at the same time, the thin film transistors in each column of pixels are connected to each other through a data line Data The driving circuit 20 is connected, which leads to the distribution of the signal lines on the touch display substrate 10 too densely. Under the limitation of the process conditions, it is easy to cause a short circuit between the signal lines, resulting in poor display and poor touch control.

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