TWI512562B - Touch-sensitive device and a driving method of driving the same - Google Patents

Description

Touch sensing device and driving method thereof

The present invention relates to a touch sensing device, and more particularly to a driving method of the touch sensing device.

With the continuous innovation of technology, touch sensing devices have been widely used in various electronic devices, such as display devices, etc. The touch sensing device eliminates the setting of buttons and increases the available display space of the display device. At present, the capacitive touch sensing device is more popular. When the user touches the capacitive touch sensing device with a finger, the proximity and touch of the finger may cause changes in the capacitance of the sensing electrode and the coupling capacitance, according to the capacitance. Change to determine where the finger is touching.

In the process of using the touch sensing device, some noise signals are often introduced due to environmental factors. If the noise signal is too large, the touch sensing signal generated by the sensing structure in the touch sensing device may be incorrect. , which in turn affects the accuracy of the determination of the touch position. Generally, the signal-to-noise ratio (SNR) is used to represent the ratio of the amount of change in the touch sensing signal to the noise, thereby measuring the strength of the touch sensing device against noise suppression. Based on this, how to improve the signal-to-noise ratio (SNR) is the primary technical problem to be solved in this case.

In view of this, a drive for driving a touch sensing device capable of improving a signal to noise ratio is provided. method.

Further, a touch sensing device capable of improving a signal to noise ratio is provided.

A driving method for a touch sensing device, the touch device includes a plurality of first sensing electrodes arranged along a first direction, and a plurality of second senses arranged in a second direction and electrically insulated from the plurality of first sensing electrodes a plurality of second sensing electrodes for outputting a plurality of touch sensing signals in response to the touch scanning signals loaded on the plurality of first sensing electrodes, wherein the plurality of touch scanning signals are loaded in the plurality of The minimum duration on a sensing electrode is defined as a scanning period. The driving method includes: simultaneously loading a plurality of touch scanning signals to the plurality of first sensing electrodes in each scanning period to provide a low potential touch. Scanning signals to the corresponding first sensing electrodes to characterize that the corresponding first sensing electrodes are in a scanned state, providing a high potential touch scanning signal to the remaining first sensing electrodes to characterize the remaining first senses The measuring electrode is in an unscanned state.

A touch sensing device includes: a plurality of first sensing electrodes arranged along a first direction, a plurality of second sensing electrodes arranged in a second direction and electrically insulated from the plurality of first sensing electrodes, the plurality The second sensing electrode is configured to output a plurality of touch sensing signals in response to the touch scanning signals loaded on the plurality of first sensing electrodes, wherein the plurality of touch scanning signals are loaded on the plurality of first sensing electrodes The minimum duration is defined as a scan period. During each scan period, the plurality of touch scan signals are simultaneously loaded to the plurality of first sensing electrodes to provide a low potential touch scan signal to the corresponding first sensing electrodes. Characterizing the corresponding first sensing electrode in a scanned state, providing a high potential touch scan signal to the remaining first sensing electrodes to characterize that the remaining first sensing electrodes are in an unscanned state.

Compared with the prior art, a low potential touch scan signal is provided to the first sensing electrode to indicate that the first sensing electrode is in a scanning state, and a high potential touch scanning signal is provided to the first in the scanning state. The sensing electrode is configured to improve the touch sensing signal received by the second sensing electrode, that is, to reduce the noise while ensuring that the received touch sensing signal does not change, thereby effectively improving The signal to noise ratio of the touch sensing device.

10‧‧‧Touch sensing device

11, Tx ₁ , Tx ₂ , Tx ₃ , ... Tx _n ‧‧‧ first sensing electrode

12‧‧‧Drive circuit

13. Rx ₁ , Rx ₂ , Rx ₃ , ... Rx _m ‧‧‧Second sensing electrode

14‧‧‧Sensor circuit

15‧‧‧Drive Signal Line

16‧‧‧Sensor signal line

St _{1 -} St _n ‧‧‧ touch scan signal

Sr ₁ -Sr _m ‧‧‧ touch sensing signal

14‧‧‧Sensor circuit

C‧‧‧ capacitor

R‧‧‧resistance

Z‧‧‧ impedance

S101-S102‧‧‧Steps

FIG. 1 is a schematic plan view of a touch structure of a touch sensing device.

FIG. 2 is an equivalent circuit diagram of the first sensing electrode and the second sensing electrode shown in FIG. 1 .

FIG. 3 is a timing diagram of the first embodiment of the plurality of touch scan signals St1-Stn provided by the driving circuit in one frame scanning time.

4 is a timing diagram of a second embodiment of the plurality of touch scan signals St1-Stn provided by the driving circuit in one frame scan time.

FIG. 5 is a timing diagram of a third embodiment of the plurality of touch scan signals St1-Stn provided by the driving circuit in one frame scanning time.

FIG. 6 is a timing diagram of the fourth embodiment of the plurality of touch scan signals St1-Stn provided by the driving circuit in one frame scanning time.

FIG. 7 is a timing diagram of the fifth embodiment of the plurality of touch scan signals St1-Stn provided by the driving circuit in one frame scanning time.

FIG. 8 is a flow chart of a driving method for driving a touch sensing device.

The present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a schematic plan view of the touch sensing device 10 . The touch sensing device 10 includes a plurality of first sensing electrodes 11 arranged in parallel in a first direction (X direction). For convenience of description, the plurality of first sensing electrodes 11 are respectively labeled as Tx ₁ , Tx ₂ , Tx ₃ , Tx _n , n is a natural number greater than 1; a driving circuit 12; a plurality of second sensing electrodes 13 arranged in parallel in the second direction (Y direction), the plurality of second sensing electrodes 13 and the first sensing The electrodes 11 are insulated to form a complex capacitor structure (not shown). For convenience of description, the plurality of second sensing electrodes 13 respectively indicate Rx ₁ , Rx ₂ , Rx ₃ , ... Rx _m , m are natural numbers greater than 1. And sensing circuit 14.

The plurality of first sensing electrodes 11 are electrically connected to the driving circuit 12 through a plurality of driving signal lines 15 respectively, so that the plurality of touch scanning signals St _{1 -} St _n output by the driving circuit 12 are respectively via corresponding driving signal lines. 15 is transmitted to the plurality of first sensing electrodes 11. The driving circuit 12 provides the complex touch scanning signals St ₁ -St _n , wherein the touch scanning signals St ₁ -St _n include a high potential touch scanning signal and a low potential touch scanning signal. It can be understood that the duration corresponding to the completion of one scan of all the driving electrodes Tx ₁ -Tx _n is defined as one frame scanning time. In the present invention, the minimum duration of the touch scan signals St ₁ -St _n supplied by the drive circuit 12 to the drive electrodes Tx ₁ -Tx _n is defined as one scan period in one frame scan time. During each scanning period, the plurality of touch scanning signals St ₁ -St _{n are} simultaneously loaded to the plurality of first sensing electrodes T _x1 -T _xn , and the low potential touch scanning signals St ₁ -St _{n are} given correspondingly When the first sensing electrode 11 is used, the corresponding first sensing electrode 11 is characterized as being scanned, and at the same time, the high potential touch scanning signals St ₁ -St _n are supplied to the remaining first sensing electrodes. 11, to characterize that the remaining first sensing electrodes 11 are in an unscanned state.

The plurality of second sensing electrodes 13 are electrically connected to the sensing circuit 14 through the plurality of sensing signal lines 16 and output corresponding touches in response to the plurality of touch scanning signals St ₁ -St _n acting on the capacitor structure. The sensing signal Sr ₁ -Sr _{m is applied} to the sensing circuit 14. The sensing circuit 14 determines the position of the touched touch point of the touch sensing device 10 according to the plurality of touch sensing signals Sr ₁ -Sr _m .

Please refer to FIG. 2 , which is an equivalent circuit diagram of a circuit structure formed by the plurality of first sensing electrodes 11 and one second sensing electrode 13 , such as the second sensing electrode R x ₁ , in FIG. 1 . The equivalent circuit diagram of the other second sensing electrodes 13 and each of the first sensing electrodes 11 is the same as the equivalent circuit diagram shown in FIG. 2 , and details are not described herein again.

Wherein, R11-R1n represents the equivalent resistance of the first sensing electrodes Tx ₁ -Tx _n ; C11-C1n represents the self-inductance capacitance of the first sensing electrodes Tx ₁ -Tx _n to the ground; C21-C2n respectively represent the first sense The mutual inductance of the measuring electrodes Tx ₁ -Tx _n and the second sensing electrode Rx ₁ respectively, that is, the capacitance structure described above; C31 represents the self-inductance capacitance of the second sensing electrode Rx1 to the ground; R1 represents the first sensing The equivalent resistance of the electrode Rx ₁ ; Z1 represents the equivalent impedance between the sense signal line 16 and ground.

As shown in FIG. 2, the equivalent resistances R11-R1n of the first sensing electrodes Tx ₁ -Tx _n , the mutual inductance capacitors C21-C2n, and the equivalent resistance R1 of the first sensing electrode Rx1 are connected in series to the driving circuit 12 and the sensing circuit. 14; the first sensing electrode Tx ₁ -Tx _n to the ground of the self-inductance capacitor C11-C1n one end is electrically connected to the node between the effective resistor R11-R1n and the mutual inductance capacitor C21-C2n, the other end is grounded; The self-inductance capacitor C31 of the sensing electrode Rx _{1 is} electrically connected to the node between the self-inductive capacitor C11-C1n and the equivalent resistor R1, and the other end is grounded; the equivalent impedance Z1 is electrically connected to the equivalent resistor R1 and Between the ground.

Please refer to FIG. 3. FIG. 3 is a timing diagram of the first embodiment of the plurality of touch scan signals St ₁ -St _n in one frame scan time. In the present embodiment, the durations of the respective scanning periods are the same. The driving circuit 12 provides n touch scan signals St1-Stn to the n first sensing electrodes Tx ₁ -Tx respectively during each scanning period T, wherein during the scanning period T ₁ -T _n , according to the plural The order of the first sensing electrodes Tx ₁ -Tx _n sequentially provides a low potential touch scan signal to the corresponding first sensing electrode 11, and the remaining first sensing electrodes 11 are applied during the same scanning period. Touch scan signal with high potential. At this time, the first sensing electrode 11 loaded with the low potential touch scanning signal is considered to be in the scanned state, and the first sensing electrode 11 loaded with the high potential touch scanning signal is considered to be considered It is in an unscanned state. In the present embodiment, each touch scan signal St _{1 -} St _n is a square wave signal having the same pulse width, and the high potential is represented by 1, and the low potential is represented by 0.

Specifically, for example, in the first scanning period T1, the first sensing electrode Tx _{1 is} in a scanning state, and the touch scanning signal St ₁ provided to the first sensing electrode Tx ₁ is at a low potential, and is provided to the remaining not in the scanning. The touch scan signals St ₂ -St _n of the first sensing electrodes Tx ₂ -Tx _n of the state are all high. In addition, during the T1 scanning period, the second sensing electrode Rx ₁ receives the touch sensing signal Sr ₁₁ .

Then, in the second scanning period T2, the first sensing electrode Tx _{2 is} in a scanning state, and the touch scanning signal St ₂ provided to the first sensing electrode Tx ₂ is at a low potential, and is provided to the second scanning state. a sensing electrode Tx _1, Tx ₃ -Tx _n touch scan signal St _1, St ₃ -St _n are both high, and accordingly, the second sensing electrode Rx ₁ receives the touch sensing signal Sr _2. And so on, in the nth scanning period Tn, the low potential touch scanning signal St _n to the nth first sensing electrode Tx _{n are provided} . During the T2 scan period, the second sensing electrode Rx ₂ receives the touch sensing signal Sr ₁₂ .

In the first scanning period Tl, based on an equivalent circuit seen in FIG. 2, because when the input to the first sensing electrodes of the touch scan signal Tx _{1 1} St low potential, and _a touch scan signal St does not affect The size of the mutual sensing capacitor C21 formed by the first sensing electrode Tx ₁ and the sensing sensing electrode Rx ₁ . At the same time, the touch scanning signals St ₂ -St _m are all high, so the touch scanning signals St ₂ -St _n affect the sensing of the first sensing electrodes Tx ₂ -Tx _n and the receiving sensing. The size of the mutual inductance capacitor C22-C2n formed by the electrode Rx1 is such that the touch sensing signal received by the second sensing electrode Rx ₁ changes to Sr0, and the touch sensing signal Sr ₁₁ can be expressed as Sr0+N. The N is a noise signal that is loaded into the touch sensing signal Sr ₁ due to interference generated by electronic components and connections in the internal circuit of the touch sensing device 10 during the first scanning period T1.

In order to avoid the subsequent comparison, the noise signal N introduced in each time period T1~Tn is the same in one frame scanning time when the driving circuit 12 scans the first sensing electrodes Tx ₂ -Tx _n .

In the second scanning period T2, since the touch scan signal St ₁ applied to the first sensing electrode Tx ₁ is at a high potential, the touch operation causes the first sensing electrode Tx ₁ and the second sensing electrode Rx _{1 to be} on the first sensing electrode Tx ₁ and the second sensing electrode Rx ₁ The mutual inductance capacitor C21 is changed, so that the touch sensing signal Sr2 outputted from the Rx _{1 is} changed compared to the touch sensing signal Sr0 when the touch operation is not received, and the amount of change is represented as ΔS, whereby the Sr ₁₂ can be Expressed as St0'+△S+N.

By analogy, in the subsequent third to nth scanning periods T3-Tn, the touch sensing signals received by the second sensing electrode Rx1 are Sr ₁₃ =Sr ₁₄ ......=Sr _1n =St0'+ △S+N.

At the T1-Tn one frame scan time, the sum of the signals received by the second sensing electrode Rx ₁ S _sum 1 = Sr ₁ + Sr ₂ + Sr ₃ + Sr ₄ + ... + Sr _n = St0 + N + (n-1 ) (St0 + ΔS + N) = nSt0 + (n-1) ΔS + nN.

Further, the signal change Sf1 actually obtained by the second sensing electrode Rx1 during the T1-Tn time period is calculated according to the signal sum S _sum 1 received by the second sensing electrode Rx ₁ during the scanning period T1-Tn, and the specific calculation manner is as follows: :S _sum 1/(n-1)=nSt0/(n-1)+△S+nN/(n-1)

Sf1=S _sum 1/(n-1)-(St0'+N)=nSt0/(n-1)+ΔS+nN/(n-1)-(St0+N)=St0/(n-1 )+△S+N/(n-1)

At this time, the signal-to-noise ratio SNR in the touch sensing signal Sf1 that is actually obtained by the second sensing electrode Rx _{1 is} expressed as 20log ((n-1) ΔS/N).

If the first sensing electrodes Tx ₁ -Tx _n are scanned by the high potential touch scanning signal to activate the corresponding first sensing electrodes 11, the second sensing electrodes Rx _{1 are} actually obtained according to the equivalent circuit diagram shown in FIG. The obtained signal change Sf0 is St0 + ΔS + N. It can be seen that the signal-to-noise ratio 20log ((n-1) ΔS/N) of the touch sensing signal Sf1 is the signal-to-noise ratio of the touch sensing signal Sf0 20 log (ΔS/N) compared with the high-potential scanning driving mode. (n-1) times, since n is a natural number greater than 1, it can be seen that the signal-to-noise ratio SNR in the first embodiment of the present invention is improved by (n-1) times compared with the prior art, and the touch sensing is enhanced. The amount of signal change in the signal reduces the influence of ambient noise on the touch sensing signal and improves the accuracy of the touch position determination.

Preferably, Ti may be inserted in two adjacent scanning period Ti + 1 between a delay time T _delay, the delay time T _delay can be adjusted according to the size of the driven load, i.e. when the drive load is large, The delay time _Tdelay can be correspondingly extended, and when the driving load is small, the delay time _Tdelay can be correspondingly shortened. At the same time, during the delay time, the touch scan signals St ₁ -St _n provided by the driving circuit 12 are all low.

Please refer to FIG. 4 , which is a timing diagram of the second embodiment of the touch scan signals St ₁ -St _n provided by the driving circuit 12 , which is basically the same as the timing chart in the first embodiment, except that the non-sequence will be low. The potential touch scan signal is supplied to the plurality of first sensing electrodes 11, for example, a low potential touch scan signal St _{i is} supplied to the first sensing electrode Tx _j during the time period T _i . Where i and j are both natural numbers, and 1≦j≦n, i and j may be different.

Specifically, as shown in FIG. 4, in the first scanning period T1, the first sensing electrode Tx _{1 is} in a scanned state, and provides a low potential touch scanning signal St ₁ to the first sensing electrode Tx ₁ while providing The high potential touch scan signal St ₂ -St _n to the remaining first sensing electrodes Tx ₂ -Tx _n not in the scanning state.

In the second scanning period T2, the first sensing electrode Tx _{3 is} in a scanning state, and provides a low potential touch scanning signal St ₃ to the first sensing electrode Tx ₃ while providing a high potential touch scanning signal St ₁ -St ₂ and St _{4 -} St _n to the first sensing electrodes Tx ₁ -Tx ₂ and Tx ₄ -Tx _n not in the scanning state.

During the third scanning period T3, the first sensing electrode Tx _{5 is} in a scanning state, and provides a low potential touch scanning signal St ₅ to the first sensing electrode Tx ₅ while providing a high potential touch scanning signal St ₁ -St ₄ and St _{6 -} St _n to the first sensing electrodes Tx ₁ -Tx ₄ and Tx ₆ -Tx _n not in the scanning state.

By analogy, the scan drive of one frame scan time is completed.

Please refer to FIG. 5 , which is a timing diagram of a third embodiment of the touch scan signals St ₁ -St _n provided by the driving circuit 12 , which is substantially the same as the timing chart in the first embodiment, and any one of each frame scanning time. The scan period Ti provides a low potential touch scan signal to the two first sensing electrodes 11. In this embodiment, the low potential touch scan signals are sequentially supplied to the adjacent two first sensing electrodes 11, and it can be understood that during the scanning period Tn, the last one and the first first sensing electrodes 11 is provided with a low potential touch scanning signal. In the present invention, the last first sensing electrode Tx _{n is} adjacent to the first first sensing electrode Tx ₁ . It can be seen that such a driving manner is such that the touch scan signals St ₁ -St _{n of the} adjacent two first sensing electrodes Tx ₁ -Tx _n partially overlap in time series. In the present embodiment, the length of the overlap time is preferably the length of one scan period T.

Specifically, as shown in FIG. 5, in the first scanning period T1, the first sensing electrodes Tx ₁ and Tx ₂ are in a scanning state, and provide low-potential touch scanning signals St ₁ and St ₂ to the first sensing electrode Tx. ₁ , Tx ₂ , providing a high potential touch scan signal St ₃ -St _n to the first sensing electrode Tx ₃ -Tx _n not in the scanning state.

In the second scanning period T2, the first sensing electrodes Tx ₂ and Tx ₃ are in a scanning state, and provide low-potential touch scanning signals St ₂ and St ₃ to the first sensing electrodes Tx ₂ and Tx ₃ to provide a high potential. The scanning scanning signals St ₁ and St ₄ -St _{n are} touched to the first sensing electrodes Tx ₁ and Tx ₄ -Tx _{n that are} not scanned.

In the third scanning period T3, the first sensing electrodes Tx3 and Tx4 are in a scanning state, and provide low-potential touch scanning signals St ₃ and St4 to the first sensing electrodes Tx3 and Tx4, and simultaneously output a high-potential touch scanning. The signals St ₁ -St ₂ and St ₅ -St _{n are} to the first sensing electrodes Tx ₁ -Tx ₂ and Tx ₅ -Tx _{n which are} not in the scanning state.

And so on, until the scan drive of one frame scan time is completed.

At this time, in the period T1-Tn, the sum of the signals received by the second sensing electrode Rx ₁ S _sum 1 = Sr ₁ + Sr ₂ + Sr ₃ + Sr ₄ + ... + Sr _n = 2 (St0' + N ) + (n-1) (St0' + ΔS + N) = nSt0' + (n-2) ΔS + nN.

Further, the signal change variation Sf1 actually obtained by the second sensing electrode Rx _{1 is} calculated according to the signal sum S _sum 1 received by the second sensing electrode Rx ₁ during the T1-Tn period, and the specific calculation manner is as follows: S _sum 1/ (n-2)=nSt0'/(n-2)+ΔS+nN/(n-2); Sf1=S _sum 1/(n-2)-(St0'+N)=nSt0'/(n -2)+△S+nN/(n-2)-(St0'+N)=2St0'/(n-2)+△S+(n-2)N/2

At this time, the signal-to-noise ratio SNR in the signal variation amount Sf1 actually received by the second sensing electrode Rx1 is expressed as 20 log ((n - 2) ΔS / (2N)).

Therefore, when a first sensing electrode 11 is simultaneously selected for driving at the same time, a is preferably a natural number smaller than n/2, and the signal-to-noise ratio SNR can be expressed as 20log ((na) ΔS/(aN) ). It can be seen that the signal-to-noise ratio SNR is also improved by (n-a)/a times relative to the high-potential element scanning mode.

Please refer to FIG. 6 , which is a timing diagram of the fourth embodiment of the touch scan signals St ₁ -St _n provided by the driving circuit 12 , which is substantially the same as the timing chart in the third embodiment, in each frame scanning time, Providing two low-potential touch scan signals to the first sensing electrodes 11 at two adjacent positions, and the non-sequential plurality of first sensing electrodes Tx ₁ -Tx _n , that is, If, in the ith scan period Ti, two low-potential scan signals St _j and St _{(j+1) are} supplied to the first sensing electrodes Tx _j and Tx _(j+1) , the i+1th scan is performed. In the time period T(i+1), the low-level scanning signals St _(j+1) and St _(j+2) are not supplied to the first sensing electrodes Tx _(j+1) and Tx _(j+2) , The low potential scanning signals St _(j+1) and St _{(j-1) are} not supplied to the first sensing electrodes Tx _(j+1) and Tx _(j-1) , so that the plurality of first sensing electrodes Tx ₁ -Tx _n of at least two first sensing electrodes of the touch scan signal Tx ₁ -Tx St ₁ -St _{n n} is partially overlap in time sequence, the overlap time is preferably a length of the duration of the scanning period.

Specifically, in the first scanning period T1, the first sensing electrodes Tx ₁ and Tx ₂ are in a scanning state, and the low potential touch scanning signals St ₁ , St _{2 are} supplied to the first sensing electrodes Tx ₁ and Tx ₂ to provide The high potential touch scan signal St ₃ -St _n to the first sensing electrode Tx ₃ -Tx _n not in the scanning state.

In the second scanning period T2, the first sensing electrodes Tx ₃ and Tx ₄ are in a scanning state, and provide low-potential touch scanning signals St ₃ , St ₄ to the first sensing electrodes Tx ₃ , Tx ₄ while providing high The potential touch scan signals St ₁ -St ₂ and St ₅ -St _n to the first sensing electrodes Tx ₁ -Tx ₂ and Tx ₅ -Tx _{n which are} not in the scanning state.

St in the third scan period T3, the first sensing electrode Tx ₁ and Tx _n in scan state, and outputs a low potential is _1, St _n in a scan state to a first sensing electrode Tx _1, Tx _n, while the output high St _{2 -} St ( _{n-1 ) of the} potential to the first sensing electrode Tx ₂ -Tx _n not in the scanning state.

And so on, scanning to the nth scanning period Tn until the scanning time of one frame is completed.

Please refer to FIG. 1 and FIG. 7 together, which is a timing diagram of a fifth embodiment of the plurality of touch scan signals St ₁ -St _n provided by the driving circuit 12 during one frame scanning time, and any one of each frame scanning period. Scanning period Ti, providing two low-potential touch scan signals to the first sensing electrodes 11 at two non-adjacent positions, scanning the plurality of first sensing electrodes Tx1-Txn in a sequential or non-sequential manner, That is, the arbitrary sensing period Ti, the first sensing electrode Txj, and the first sensing electrode 11 other than Tx(j-1) and Tx(j+1) are in a scanning state.

Specifically, as shown in FIG. 7 , in the first scanning period T1 , the first sensing electrodes Tx ₁ and Tx ₄ are in a scanning state, and provide low-potential touch scanning signals St ₁ , St ₄ to the first sensing electrodes. Tx ₁ and Tx ₄ simultaneously provide high-potential touch scan signals St ₂ -St ₃ and St ₅ -St _n to the first sensing electrodes Tx ₂ -Tx3 and Tx ₅ -Tx _{n which are} not in the scanning state.

In the second scanning period T2, the first sensing electrodes Tx ₂ and Tx _n are in a scanning state, and provide low-potential touch scanning signals St ₂ , St _n to the first sensing electrodes Tx ₂ and Tx _n while outputting high The potential touch scan signals St ₁ and St _{3 -} St _(n-1) to the first sensing electrodes Tx ₁ and Tx ₃ -Tx _{(n-1) which are} not in the scanning state.

In the third scanning period T3, the first sensing electrodes Tx ₁ and Tx ₃ are in a scanning state, and provide low-potential touch scanning signals St ₁ , St ₃ to the first sensing electrodes Tx ₁ , Tx ₃ while providing high The potential touch scan signals St ₂ and St _{4 -} St _n to the first sensing electrodes Tx ₂ and Tx ₄ -Tx _{n which are} not in the scanning state.

And so on, until the nth scan period, one frame scan time scan drive is completed.

FIG. 8 is a flowchart of a method for driving the touch sensing device 10 according to the present invention. The driving method of the touch sensing device 10 can be obtained according to the timing chart of the driving signals provided by the driving circuit 12 illustrated in the above five examples. The driving method includes the steps:

In step S101, in each scanning period T, a plurality of touch scan signals St ₁ -St _{n are} simultaneously provided to the plurality of first sensing electrodes Tx ₁ -Tx _n .

Step S102, providing a low potential touch scan signal St ₁ -St _n to the corresponding first sensing electrode 11 to characterize that the corresponding first sensing electrode is in a scanned state; providing a high potential touch scanning signal St _{1 -} St _{n is} given to the remaining first sensing electrodes 11 to characterize that the remaining first sensing electrodes 11 are in an unscanned state.

Preferably, a first sensing electrode Tx ₁ -Tx _{n is} selected for any one scanning period T in each frame scanning time, and a corresponding potential touch scanning signal St ₁ -St _{n is} outputted to the first sensing electrode Tx ₁ -Tx _n .

More preferably, one first sensing electrode Tx ₁ -Tx _n is sequentially scanned in accordance with the arrangement order of the plurality of first sensing electrodes Tx ₁ -Tx _n .

Preferably, in each scanning period, the low potential touch scan signal is only provided to a first sensing electrode, wherein a is preferably a natural number less than n/2, and n is the first sensing The total number of electrodes, n is a natural number greater than one.

More preferably, the low-level touch scan signals are sequentially supplied to the a first sensing electrodes according to the arrangement order of the plurality of first sensing electrodes Tx ₁ -Tx _n .

More preferably, the touch scan signals St ₁ -St _{n of} the plurality of first sensing electrodes Tx ₁ -Tx _n partially overlap in time series.

More preferably, the length of time that the touch scan signals St ₁ -St _{n of} the plurality of first sensing electrodes Tx ₁ -Tx _n partially overlap in time is equal to the duration T of one scanning period.

More preferably, the touch scan signals St ₁ -St _{n of the} adjacent two first sensing electrodes Tx ₁ -Tx _n partially overlap in time series.

More preferably, the a plurality of first sensing electrodes Tx ₁ -Tx _n are not adjacent in position.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

S201-S202‧‧‧Steps

Claims (9)

A driving method for a touch sensing device, the touch sensing device includes a plurality of first sensing electrodes arranged along a first direction, and a plurality of first sensing electrodes arranged in a second direction and electrically insulated from the plurality of first sensing electrodes a plurality of sensing electrodes, wherein the plurality of second sensing electrodes are configured to output a plurality of touch sensing signals in response to the touch scanning signals loaded on the plurality of first sensing electrodes, wherein the plurality of touch scanning signals are loaded in the The minimum duration on the plurality of first sensing electrodes is defined as a scanning period, and the driving method includes: simultaneously loading the plurality of touch scanning signals to the plurality of first sensing electrodes in each scanning period to provide a low potential Touching the scan signal to the corresponding first sensing electrode to characterize that the corresponding first sensing electrode is in a scanned state, providing a high potential touch scanning signal to the remaining first sensing electrodes to characterize the remaining portion a sensing electrode is in an unscanned state; a delay period is inserted between adjacent scanning periods, and a low potential touch scanning signal is supplied to the corresponding first sensing power during the delay period . The driving method of the touch sensing device according to claim 1, wherein each scanning period lasts for the same time. The driving method of the touch sensing device according to any one of claims 1 to 2, wherein, in each scanning period, the low-level touch scanning signal is only provided with a first sensing electrode, wherein a takes a natural number less than n/2, n is the total number of the first sensing electrodes, and n is a natural number greater than one. The driving method of the touch sensing device of claim 3, wherein the low-level touch scan signal is sequentially provided to the one according to the arrangement order of the plurality of first sensing electrodes in one frame scanning time The first sensing electrode. The driving method of the touch sensing device according to claim 4, wherein the plurality of first sensing electrodes The touch scan signals partially overlap in timing. The driving method of the touch sensing device of claim 5, wherein the length of time that the touch scan signals of the plurality of first sensing electrodes partially overlap in time is equal to the duration of one scanning period. The driving method of the touch sensing device of claim 5, wherein the touch scan signals of the adjacent two first sensing electrodes partially overlap in time series. The driving method of the touch sensing device of claim 3, wherein the a first sensing electrodes are not adjacent in position. A touch sensing device includes: a plurality of first sensing electrodes arranged along a first direction, a plurality of second sensing electrodes arranged in a second direction and electrically insulated from the plurality of first sensing electrodes, the plurality The second sensing electrode is configured to output a plurality of touch sensing signals in response to the touch scanning signals loaded on the plurality of first sensing electrodes, wherein the plurality of touch scanning signals are loaded on the plurality of first sensing electrodes The minimum duration defines a scan period, wherein in each scan period, the plurality of touch scan signals are simultaneously loaded to the plurality of first sensing electrodes to provide a low potential touch scan signal to the corresponding first sensing electrodes. To characterize that the corresponding first sensing electrode is in a scanned state, providing a high potential touch scan signal to the remaining first sensing electrodes to characterize that the remaining first sensing electrodes are in an unscanned state; A delay period is inserted between adjacent scan periods, and a low potential touch scan signal is supplied to the corresponding first sensing electrode during the delay period.