Touch panel

Abstract

The present invention discloses a touch panel comprising a first gate drive circuit, a first touch circuit, a second gate drive circuit and a second touch circuit. Wherein the first touch circuit is connected to the first gate drive circuit and the first touch circuit has a first capacitance. The second touch circuit is connected to the second gate drive circuit and the second touch circuit has a second capacitor, wherein the first capacitor is connected in parallel with the second capacitor.

Description

technical field [0001] The invention relates to a touch panel. Background technique [0002] Figure 1A A structural diagram showing a prior art touch panel, Figure 1B draw Figure 1A The waveform diagram of the signal output by the circuit. As far as the existing technology of in-cell touch is concerned, when in-cell touch sensing is being performed, in order to avoid sensing errors caused by other noise interference, it is required that a Gate driver on array circuit (Gate driver on array circuit, The output of the GOA) signal is suspended, that is, the timing signals CLK1 - CLK4 and the trigger signal STV are all at low potential during the sensing period. After the sensing is over, the signal after the previous pause continues to be output. In this case, if no changes are made, the pull-down circuit inside the GOA will generate a leakage current when the in-cell touch sensing is performed, so that the Q point potential of the current level GOA will be affected by the...

AI Technical Summary

Problems solved by technology

When the sensing is completed and the signal starts to output, the circuit of this stage will produce a poor gate output because the potential of the Q point is too low

If the situation is serious, it will cause no output of the gate of this stage, resulting in abnormal circuit function

by Figure 1A and Figure 1B For example, after the output of G(002) is completed, the Q point (Q003) of the stage of G(003) has been pre-charged to a high potential, and the embedded touch sensor starts to sense at this time. In the input signal (ITP) detection interval, all GOA signals are non-output. Since the ITP detection interval is as long as 200 microseconds, the potential of Q(003) will drop from high potential all the way due to the leakage of the pull-down circuit of this stage.

When the sensing is completed and the timing signal CLK3 is input, G(003) starts to output, but because the potential of Q(003) is insufficient, the pulse wave of G(003) will become worse or there will be no output. In this way, it will cause Subsequent gates cannot be output smoothly and sequentially

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