Anti-interference driving method of touch panel and touch panel device using same

Abstract

The invention provides an anti-interference driving method of a touch panel and a touch panel device using a same. The anti-interference driving method of the touch panel has steps of providing the touch panel and outputting multiple excitation signal sets to the respective driving lines of the touch panel. The touch panel has multiple driving lines and multiple receiving lines. Each driving line has multiple sub-driving lines. Each excitation signal set has multiple excitation signals sequentially outputted to the corresponding sub-driving lines. The excitation signals outputted to any adjacent two sub-driving lines are reversed in phase and a time gap between the excitation signals with reverse phases is less than a cycle of each excitation signal. Accordingly, two sensing signals having coupled capacitance values of a noise with different signs is obtained by using a receiving line to sense any adjacent two sub-driving lines and can be directly processed to remove the coupled capacitance value of the noise.

Description

technical field [0001] The invention relates to a touch panel, in particular to an anti-noise interference driving method of the touch panel and a touch panel device thereof. Background technique [0002] see Figure 6A As shown, a touch panel includes a plurality of driving lines TX1~TX4 and a plurality of receiving lines RX1~RX4, wherein each driving line and each receiving line RX1~RX4 intersect to form a sensing point; and a plurality of driving lines The lines TX1 - TX4 respectively receive stimulation signals. When the stimulation signals are input, each sensing point is a coupling capacitor, and each receiving line RX1 - RX4 is connected to a receiving circuit 31 . When the driving line TX2 receives a stimulus signal, the receiving circuits 31 of the multiple receiving lines RX1~RX4 begin to receive the induction signal, as Figure 6B As shown, each receiving circuit 31 includes at least a sample-and-hold circuit 311 and an analog-to-digital converter 312, wherein th...

AI Technical Summary

Problems solved by technology

[0012] Although the above-mentioned first anti-noise method can eliminate the ghost image problem caused by noise, it not only needs to change the layout of the sensing lines of the touch panel, but also needs to add a receiving circuit for each sub-receiving line, and the circuit components of the receiving circuit It is complicated and relatively increases the production cost; as for the second method of anti-noise interference, although the layout of the touch panel sensing lines does not need to be changed, it can only eliminate the interference of low-frequency noise due to the limitation of the sampling frequency, and the noise of too high frequency cannot pass through the first method. two ways to rule out

Therefore, the current anti-noise interference method is still not perfect, and a better solution still needs to be proposed

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