Touch scanning method, touch display panel and touch display device
A touch display panel and touch scanning technology, applied in the fields of instruments, computing, electrical and digital data processing, etc., can solve the problems of affecting the touch effect, large touch interference, low signal-to-noise ratio, etc., and reduce touch coupling noise. Influence, improve the signal-to-noise ratio, improve the effect of the touch effect
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Embodiment 1
[0026] An embodiment of the present invention provides a touch scanning method for a touch display panel, such as figure 1 As shown, the touch display panel 1 includes a plurality of touch driving lines 2, a plurality of gate lines 3, a plurality of touch sensing lines 4 insulated and intersecting with the plurality of touch driving lines, and a plurality of insulated and intersected touch sensing lines 4 with the plurality of gate lines. A plurality of intersecting data lines (not shown), a touch driving circuit (not shown) connected to the touch driving line 2, a touch detection circuit 5 connected to the touch sensing line 4, and a gate line 3 A gate drive circuit (not shown), wherein the touch drive line 2 is parallel to the gate line 3;
[0027] Such as figure 2 As shown, touch scanning methods include:
[0028] Step S1: Apply a touch driving signal to the touch driving line, and apply a gate driving signal to the gate line; that is, the touch driving line performs tou...
Embodiment 2
[0046] The same part of the second embodiment and the first embodiment will not be repeated. The difference between the second embodiment and the first embodiment is that: figure 2 As shown: the touch drive line overlapped with the gate line is not applied with the touch drive signal during the period when the gate line is applied with the gate drive signal. It can also be completed by step S2b:
[0047]Step S2b: the touch drive line overlapping with the gate line is not applied with the touch drive signal during the period when the gate drive signal is applied to the gate line, and does not overlap with the gate line applied with the gate drive signal The touch driving signal is applied to the touch driving line.
[0048] In the touch scanning method provided by the embodiment of the present invention, the touch driving line overlapped with the gate line is not applied with the touch driving signal during the period when the gate line is applied with the gate driving signal,...
Embodiment 3
[0050] The same part of the third embodiment and the first and second embodiments will not be repeated. The difference between the third embodiment and the first and second embodiments is that: image 3 As shown, the touch scanning method includes step S2c: a touch driving signal is applied to the touch driving line overlapping with the gate line during the period when the gate driving signal is applied to the gate line, and the corresponding touch of the touch driving line In other words, the touch detection circuit can also be used to compensate the touch detection signal applied to the touch sensing line;
[0051] Specifically, the touch detection signal corresponding to the touch drive line is compensated, including:
[0052] Store a compensation value in advance, filter the touch driving signal, and compensate the filtered touch detection signal according to the pre-stored compensation value. Optionally, the compensation value is not limited to the charge value, current v...
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