CN103336644A - Touch sensing device and driving method thereof - Google Patents
Touch sensing device and driving method thereof Download PDFInfo
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- CN103336644A CN103336644A CN2013102436256A CN201310243625A CN103336644A CN 103336644 A CN103336644 A CN 103336644A CN 2013102436256 A CN2013102436256 A CN 2013102436256A CN 201310243625 A CN201310243625 A CN 201310243625A CN 103336644 A CN103336644 A CN 103336644A
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Abstract
The invention relates to a touch sensing device and a driving method thereof. The touch sensing device comprises a plurality of first sensing electrodes which are arrayed along a first direction, and a plurality of second sensing electrodes which are arrayed along a second direction, are intersected with the first sensing electrodes in an electric insulation manner, and are used for responding to touch scanning signals loaded on the first sensing electrodes to output a plurality of touch induction signals. The minimum duration of each touch scanning signal loaded on the corresponding first sensing electrode is defined as a scanning time bucket, and the driving method comprises the steps of loading the touch scanning signals to the first sensing electrodes simultaneously in every scanning time bucket, providing a low-potential touch scanning signal to a corresponding first sensing electrode for representing that the corresponding first sensing electrode is in a scanned state, and providing high-potential touch scanning signals to the rest of first sensing electrodes for representing that the rest of first sensing electrodes are in a non-scanned state.
Description
Technical field
The present invention relates to a kind of touch sensing device, relate in particular to a kind of driving method of this touch sensing device.
Background technology
Along with science and technology is constantly innovated, touch sensing device has been widely used in electronic installation miscellaneous, display device etc. for example, and touch sensing device saves the setting of button, strengthens the available display space of display device.Present comparatively popular capacitive touch sensing device, when the user uses the finger touches capacitive touch sensing device, approach and the touching of finger can cause the variation of sensing electrode self capacity and coupling capacitance, determines the position of finger touches according to this capacitance variations.
Touch sensing device in use; because Effect of Environmental, introducing portion is divided noise signal through regular meeting, if this noise signal is excessive; then may cause the touch-control sensing signal that sensing structure produces in the touch sensing device mistake to occur, and then influence is to the accuracy of position of touch judgement.Usually, utilize signal to noise ratio (snr) to represent the ratio of touch-control sensing change amount signal and noise, so as to weighing touch sensing device to the power of noise suppression ability.Based on this, how improving signal to noise ratio (snr) is this case primary technical matters to be solved at present.
Summary of the invention
Given this, provide a kind of driving method that can improve the driving touch sensing device of signal to noise ratio (S/N ratio).
Further, provide a kind of touch sensing device that can improve signal to noise ratio (S/N ratio).
A kind of driving method of touch sensing device, this contactor control device comprises a plurality of first sensing electrodes of arranging along first direction, a plurality of second sensing electrodes of arranging and intersecting with these a plurality of first sensing electrode electrical isolations along second direction, these a plurality of second sensing electrodes are used for responding the touch scanning signals that is carried on these a plurality of first sensing electrodes and export a plurality of touch-control sensing signals, wherein, the minimum duration that these a plurality of touch scanning signals are carried on these a plurality of first sensing electrodes is defined as the one scan period, and this driving method comprises:
In each scanning period, load a plurality of touch scanning signals simultaneously to these a plurality of first sensing electrodes, provide the touch scanning signals of electronegative potential to be in the state that is scanned to corresponding first sensing electrode to characterize this corresponding first sensing electrode, provide the touch scanning signals of noble potential to be in the state that is not scanned to characterize this remaining first sensing electrode for remaining first sensing electrode.
A kind of touch sensing device, comprise: a plurality of first sensing electrodes of arranging along first direction, a plurality of second sensing electrodes of arranging and intersecting with these a plurality of first sensing electrode electrical isolations along second direction, these a plurality of second sensing electrodes are used for responding the touch scanning signals that is carried on these a plurality of first sensing electrodes and export a plurality of touch-control sensing signals, wherein, the minimum duration that these a plurality of touch scanning signals are carried on these a plurality of first sensing electrodes is defined as the one scan period, in each scanning period, load a plurality of touch scanning signals simultaneously to these a plurality of first sensing electrodes, provide the touch scanning signals of electronegative potential to be in the state that is scanned to corresponding first sensing electrode to characterize this corresponding first sensing electrode, provide the touch scanning signals of noble potential to be in the state that is not scanned to characterize this remaining first sensing electrode for remaining first sensing electrode.
Compared to prior art, touch scanning signals to the first sensing electrode of electronegative potential is provided, be in scanning mode to characterize this first sensing electrode, provide the touch scanning signals of noble potential to first sensing electrode that is not in scanning mode simultaneously, make the received touch-control sensing signal of second sensing electrode be significantly improved, that is to say under the constant situation of the touch-control sensing change amount signal that guarantees to receive, reduced noise, thereby effectively improved the signal to noise ratio (S/N ratio) of this touch sensing device.
Description of drawings
Fig. 1 is the floor map of the touch-control structure of touch sensing device.
Fig. 2 is the schematic equivalent circuit of first sensing electrode and second sensing electrode as shown in Figure 1.
A plurality of touch scanning signals St that Fig. 3 provides in a vertical interval for driving circuit
1-St
nThe sequential chart of first embodiment.
A plurality of touch scanning signals St that Fig. 4 provides in a vertical interval for driving circuit
1-St
nThe sequential chart of second embodiment.
A plurality of touch scanning signals St that Fig. 5 provides in a vertical interval for driving circuit
1-St
nThe sequential chart of the 3rd embodiment.
A plurality of touch scanning signals St that Fig. 6 provides in a vertical interval for driving circuit
1-St
nThe sequential chart of the 4th embodiment.
A plurality of touch scanning signals St that Fig. 7 provides in a vertical interval for driving circuit
1-St
nThe sequential chart of the 5th embodiment.
Fig. 8 is for driving the driving method process flow diagram of touch sensing device.
The main element symbol description
| Touch sensing device | 10 |
| First sensing electrode | 11、Tx 1、Tx 2、Tx 3、……Tx n |
| Driving circuit | 12 |
| Second sensing electrode | 13、Rx 1、Rx 2、Rx 3、……Rx m |
| Sensing circuit | 14 |
| Drive signal line | 15 |
| Sensing signal line | 16 |
| Touch scanning signals | St 1-St n |
| The touch-control sensing signal | Sr 1-Sr m |
| Sensing circuit | 14 |
| Electric capacity | C |
| Resistance | R |
| Impedance | Z |
Following embodiment will further specify the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1, it is the floor map of touch sensing device 10.Touch sensing device 10 comprises a plurality of first sensing electrodes 11 that are arranged in parallel along first direction (directions X), and for ease of describing, these a plurality of first sensing electrodes 11 are denoted as Tx respectively
1, Tx
2, Tx
3... Tx
n, n is the natural number greater than 1; Driving circuit 12; A plurality of second sensing electrodes 13 that are arranged in parallel along second direction (Y-direction), thereby these a plurality of second sensing electrodes 13 insulate to intersect with this first sensing electrode 11 and constitute a plurality of capacitance structures (indicating), for ease of describing the Rx that these a plurality of second sensing electrodes 13 indicate respectively
1, Rx
2, Rx
3... Rx
m, m is the natural number greater than 1; And sensing circuit 14.
These a plurality of first sensing electrodes 11 electrically connect by many drive signal lines 15 and this driving circuit 12 respectively, so that a plurality of touch scanning signals St of these driving circuit 12 outputs
1-St
nBe sent to this a plurality of first sensing electrodes 11 via corresponding drive signal line 15 respectively.These driving circuit 12 circulations provide this a plurality of touch scanning signals St
1-St
n, wherein, this touch scanning signals St
1-St
nComprise the touch scanning signals of noble potential and the touch scanning signals of electronegative potential.Be appreciated that as whole drive electrode Tx
1-Tx
nAll finish the corresponding duration of single pass and be defined as a vertical interval.Among the present invention, in a vertical interval, this driving circuit 12 offers drive electrode Tx
1-Tx
nTouch scanning signals St
1-St
nMinimum duration be defined as one scanning the period.In each scanning period, load a plurality of touch scanning signals St simultaneously
1-St
nTo these a plurality of first sensing electrode T
X1-T
Xn, as the touch scanning signals St of electronegative potential
1-St
nWhen giving corresponding first sensing electrode 11, characterize this corresponding first sensing electrode 11 and be in the state that is scanned, in this simultaneously, the touch scanning signals St of noble potential
1-St
nBe provided for remaining first sensing electrode 11, be in the state that is not scanned to characterize this remaining first sensing electrode 11.
These a plurality of second sensing electrodes 13 electrically connect by many sensing signal line 16 and sensing circuit 14 respectively, and these a plurality of touch scanning signals St of response
1-St
nAct on this capacitance structure and export corresponding touch-control sensing signal Sr
1-Sr
mTo this sensing circuit 14.Sensing circuit 14 is according to these a plurality of touch-control sensing signal Sr
1-Sr
mJudge that this touch sensing device 10 is by the touch point position of touch-control.
See also Fig. 2, it is a plurality of first sensing electrodes 11 and second sensing electrode 13 among Fig. 1, as the second sensing electrode Rx
1The equivalent circuit diagram of the circuit structure that forms.Other second sensing electrode 13 is identical with the equivalent circuit diagram of each first sensing electrode 11 and equivalent circuit diagram shown in Figure 2 respectively, and present embodiment repeats no more.
Wherein, R11-R1n represents the first sensing electrode Tx
1-Tx
nEquivalent resistance; C11-C1n represents the first sensing electrode Tx
1-Tx
nSelf-induction electric capacity over the ground; C21-C2n represents the first sensing electrode Tx respectively
1-Tx
nWith the second sensing electrode Rx
1The Inductance and Capacitance of Gou Chenging that is to say aforesaid capacitance structure respectively; C31 represents second sensing electrode Rx1 self-induction electric capacity over the ground; R1 represents the first sensing electrode Rx
1Equivalent resistance; Z1 represents the equiva lent impedance between sensing signal line 16 and the ground.
As shown in Figure 2, the first sensing electrode Tx
1-Tx
nEquivalent resistance R11-R1n, Inductance and Capacitance C21-C2n, the equivalent resistance R1 of the first sensing electrode Rx1 be series between driving circuit 12 and the sensing circuit 14; The first sensing electrode Tx
1-Tx
nSelf-induction capacitor C 11-C1n one end over the ground is electrically connected at the node of imitating between resistance R 11-R1n and the Inductance and Capacitance C21-C2n, an other end ground connection; The second sensing electrode Rx
1Self-induction capacitor C 31 1 ends over the ground are electrically connected at the node between self-induction capacitor C 11-C1n and the equivalent resistance R1, an other end ground connection; Equiva lent impedance Z1 is electrically connected between equivalent resistance R1 and the ground.
See also Fig. 3, wherein, Fig. 3 is in a vertical interval, a plurality of touch scanning signals St
1-St
nThe sequential chart of first embodiment.In the present embodiment, each to scan the duration of period identical.Driving circuit 12 all provides n touch scanning signals St1-Stn to divide at each scanning period T and is clipped to this n the first sensing electrode Tx
1-Tx, wherein, at scanning period T
1-T
nDuring this time, according to these a plurality of first sensing electrode Tx
1-Tx
nPut in order, the touch scanning signals that electronegative potential is provided successively is to corresponding first sensing electrode 11, and with the one scan period, 11 quilts of remaining first sensing electrode are granted the touch scanning signals of noble potential.At this moment, first sensing electrode 11 that has been loaded the touch scanning signals of electronegative potential considered to be in the state that is scanned, and 11 of first sensing electrodes that have been loaded the touch scanning signals of noble potential considered to be in the state that is not scanned.In the present embodiment, each touch scanning signals St
1-St
nBe the identical square-wave signal of pulsewidth, and described noble potential represents that with 1 electronegative potential is represented with 0.
Particularly, for example at the first scanning period T1, the first sensing electrode Tx
1Be in scanning mode, provide to the first sensing electrode Tx
1Touch scanning signals St
1Be electronegative potential, simultaneously, provide the first sensing electrode Tx that is not in scanning mode to all the other
2-Tx
nTouch scanning signals St
2-St
nBe noble potential.In addition, at T1 scanning period, the second sensing electrode Rx
1Receive touch-control sensing signal Sr
11
Then, at the second scanning period T2, the first sensing electrode Tx
2Be in scanning mode, provide to the first sensing electrode Tx
2Touch scanning signals St
2Be electronegative potential, simultaneously, provide to the first sensing electrode Tx that is not in scanning mode
1, Tx
3-Tx
nTouch scanning signals St
1, St
3-St
nBe noble potential, correspondingly, the second sensing electrode Rx
1Receive touch-control sensing signal Sr
2And the like, at n scanning period Tn, provide the touch scanning signals St of electronegative potential
nTo n the first sensing electrode Tx
nAt T2 scanning period, the second sensing electrode Rx
2Receive touch-control sensing signal Sr
12
At the first scanning period T1, according to the equivalent circuit diagram among Fig. 2 as can be known, owing to input to the first sensing electrode Tx this moment
1Touch scanning signals St
1Be electronegative potential, touch scanning signals St
1Can't influence the first sensing electrode Tx
1With reception sensing sensing electrode Rx
1The size of the Inductance and Capacitance C21 that constitutes.In this simultaneously, touch scanning signals St
2-St
mBe noble potential, so those touch scanning signals St
2-St
nAll can influence the first sensing electrode Tx
2-Tx
nWith the size of the Inductance and Capacitance C22-C2n that receives sensing sensing electrode Rx1 formation, thus, the second sensing electrode Rx
1The touch-control sensing signal that receives is changed to Sr0
', touch-control sensing signal Sr then
11Then can be expressed as Sr0
'+ N.Wherein, N is in the first scanning period T1, because the interference that electronic component and connection produce in touch sensing device 10 internal circuits, and be loaded into touch-control sensing signal Sr
1Noise signal.
For being not easy to follow-up comparative descriptions, at the driving circuit 12 scannings first sensing electrode Tx
2-Tx
nA vertical interval in, the noise signal N that each time period T1 ~ Tn introduces is all identical.
At the second scanning period T2, owing to be applied to the first sensing electrode Tx this moment
1Touch scanning signals St
1Be noble potential, this touch operation makes the sensing electrode Tx that wins
1With the second sensing electrode Rx
1On Inductance and Capacitance C21 change, make from Rx
1The touch-control sensing signal Sr2 of output is compared to the touch-control sensing signal Sr0 that does not receive when touching behaviour
'Change, this variable quantity is expressed as Δ S, thus, and Sr
12Can be expressed as St0 '+Δ S+N.
By that analogy, in like manner, at the 3rd to n follow-up scanning period T3-Tn, the touch-control sensing signal that the second sensing electrode Rx1 receives is respectively Sr
13=Sr
14=Sr
1n=St0 '+Δ S+N.
At T1-Tn one vertical interval, the second sensing electrode Rx
1The signal summation S that receives
Sum1=Sr
1+ Sr
2+ Sr
3+ Sr
4+ ... + Sr
n=St0
'+ N+ (n-1) (St0
'+ Δ S+N)=nSt0
'+ (n-1) Δ S+nN.
Further, according to the second sensing electrode Rx
1The signal summation S that receives in the scanning period T1-Tn time period
Sum1 calculates the second sensing electrode Rx1 changes Sf1 at the signal of actual acquisition of T1-Tn time period, and concrete account form is as follows:
S
sum1/(n-1)=nSt0
’/(n-1)+ΔS+nN/(n-1)
Sf1=S
sum1/(n-1)-(St0’+N)=nSt0
’/(n-1)+ΔS+nN/(n-1)-(St0
’+N)=St0
’/(n-1)+ΔS+N/(n-1)
At this moment, the second sensing electrode Rx
1Signal to noise ratio snr is expressed as 20log ((n-1) Δ S/N) among the touch-control sensing signal Sf1 of the variation of the actual acquisition that receives.
If adopt the touch scanning signals of noble potential to scan the first sensing electrode Tx
1-Tx
nWhen activating corresponding first sensing electrode 11, according to equivalent circuit diagram shown in Figure 2, the second sensing electrode Rx
1It is St0+ Δ S+N that the actual signal that obtains changes Sf0.As seen, turntable driving mode compared to noble potential, the signal to noise ratio (S/N ratio) 20log of touch-control sensing signal Sf1 ((n-1) Δ S/N) be touch-control sensing signal Sf0 signal to noise ratio (S/N ratio) 20log (Δ S/N) (n-1) doubly, because n is the natural number greater than 1, as seen the signal to noise ratio snr in the first embodiment of the invention has improved (n-1) doubly compared to prior art, strengthened change amount signal in the touch-control sensing signal, make environmental noise reduce the influence of touch-control sensing signal, improve the exactness that position of touch is judged.
Preferably, can scan insertion T one time delay between period Ti and the Ti+1 adjacent two
Delay, this time delay T
DelayCan adjust according to the size that drives load, that is to say when driving load greatly the time, this time delay T
DelayCan correspondingly prolong, when driving load hour, this time delay T
DelayCan correspondingly shorten.Simultaneously, in this time delay, the touch scanning signals St that driving circuit 12 provides
1-St
nBe electronegative potential.
See also Fig. 4, the touch scanning signals St that it provides for driving circuit 12
1-St
nSequential chart in the sequential chart of second embodiment, itself and first embodiment is basic identical, and difference is that the touch scanning signals with electronegative potential of non-order offers this a plurality of first sensing electrodes 11, for example, and at T
iTime period provides the touch scanning signals St of electronegative potential
iGive the first sensing electrode Tx
jWherein, i and j are natural number, and 1 ≦ j ≦ n, and i and j can be inequality.
Particularly, as shown in Figure 4, at the 1st scanning period T1, the first sensing electrode Tx
1Be in the state that is scanned, the touch scanning signals St of electronegative potential is provided
1To the first sensing electrode Tx
1, the touch scanning signals St of noble potential is provided simultaneously
2-St
nTo remaining be not in the first sensing electrode Tx of scanning mode
2-Tx
n
At the 2nd scanning period T2, the first sensing electrode Tx
3Be in scanning mode, the touch scanning signals St of electronegative potential is provided
3To the first sensing electrode Tx
3, the touch scanning signals St of noble potential is provided simultaneously
1-St
2And St
4-St
nTo the first sensing electrode Tx that is not in scanning mode
1-Tx
2And Tx
4-Tx
n
At the 3rd scanning period T3, the first sensing electrode Tx
5Be in scanning mode, the touch scanning signals St of electronegative potential is provided
5To the first sensing electrode Tx
5, the touch scanning signals St of noble potential is provided simultaneously
1-St
4And St
6-St
nTo the first sensing electrode Tx that is not in scanning mode
1-Tx
4And Tx
6-Tx
n
And the like, finish the turntable driving of a vertical interval.
See also Fig. 5, the touch scanning signals St that it provides for driving circuit 12
1-St
nThe 3rd embodiment sequential chart, the sequential chart in itself and first embodiment is basic identical, any one scanning period Ti in each vertical interval provides touch scanning signals to 2 first sensing electrode 11 of electronegative potential.In the present embodiment, the touch scanning signals of electronegative potential is offered on two adjacent first sensing electrodes 11 in regular turn, be appreciated that, at scanning period Tn, the last item and article one first sensing electrode 11 are provided the touch scanning signals of electronegative potential, among the present invention, the last item first sensing electrode Tx
nWith article one first sensing electrode Tx
1Be in the adjacent position.As seen, such type of drive makes adjacent two first sensing electrode Tx
1-Tx
nTouch scanning signals St
1-St
nOverlapping on sequential top.In the present embodiment, the length of overlapping time is preferably the duration of a scanning period T.
Particularly, as shown in Figure 5:
At the first scanning period T1, the first sensing electrode Tx
1With Tx
2Be in scanning mode, the touch scanning signals St of electronegative potential is provided
1, St
2To the first sensing electrode Tx
1, Tx
2, the touch scanning signals St of noble potential is provided
3-St
nTo the first sensing electrode Tx that is not in scanning mode
3-Tx
n
At the second scanning period T2, the first sensing electrode Tx
2With Tx
3Be in scanning mode, the touch scanning signals St of electronegative potential is provided
2, St
3To the first sensing electrode Tx
2, Tx
3, the touch scanning signals St of noble potential is provided
1And St
4-St
nTo the first sensing electrode Tx that is not scanned
1And Tx
4-Tx
n
At the 3rd scanning period T3, the first sensing electrode Tx3 and Tx4 are in scanning mode, and the touch scanning signals St of electronegative potential is provided
3, St4 to the first sensing electrode Tx3, Tx4, export the touch scanning signals St of noble potential simultaneously
1-St
2And St
5-St
nTo the first sensing electrode Tx that is not in scanning mode
1-Tx
2And Tx
5-Tx
n
And the like, until the turntable driving of finishing a vertical interval.
At this moment, in the T1-Tn time period, the second sensing electrode Rx
1The signal summation S that receives
Sum1=Sr
1+ Sr
2+ Sr
3+ Sr
4+ ... + Sr
nThe Δ S+nN of=2 (St0 '+N)+(n-1) (St0 '+Δ S+N)=nSt0 '+(n-2).
Further, according to the second sensing electrode Rx
1The signal summation S that receives in the T1-Tn time period
Sum1 calculates the second sensing electrode Rx
1The actual signal that obtains changes variable quantity Sf1, and concrete account form is as follows:
S
sum1/(n-2)=nSt0’/(n-2)+ΔS+nN/(n-2);
Sf1=S
sum1/(n-2)-(St0’+N)=nSt0’/(n-2)+ΔS+nN/(n-2)-(St0’+N)=2St0’/(n-2)+ΔS+(n-2)N/2
At this moment, signal to noise ratio snr is expressed as 20log ((n-2) Δ S/ (2N)) among the actual change amount signal Sf1 that receives of the second sensing electrode Rx1.
So when synchronization selected a bar first sensing electrode 11 to drive simultaneously, a was preferably the natural number less than n/2, its signal to noise ratio snr then can be expressed as 20log ((n-a) Δ S/ (aN)).As seen, this moment, signal to noise ratio snr also improved (n-a)/a doubly with respect to the noble potential scan mode.
See also Fig. 6, the touch scanning signals St that it provides for driving circuit 12
1-St
nThe sequential chart of the 4th embodiment, sequential chart in itself and the 3rd embodiment is basic identical, in each vertical interval, at any one scanning period Ti, first sensing electrode 11 on touch scanning signals to 2 adjacent position of two electronegative potentials is provided, and these a plurality of first sensing electrode Tx of non-order
1-Tx
n, that is to say, if at i section sweep time Ti, provide the sweep signal St of two electronegative potentials
jWith St
(j+1)To the first sensing electrode Tx
jWith Tx
(j+1), i+1 section sweep time T (i+1) does not then then provide the sweep signal St of electronegative potential
(j+1)With St
(j+2)To the first sensing electrode Tx
(j+1)And Tx
(j+2), the sweep signal St of electronegative potential is not provided yet
(j+1)With St
(j-1)To the first sensing electrode Tx
(j+1)And Tx
(j-1)Thereby, feasible these a plurality of first sensing electrode Tx
1-Tx
nIn at least two first sensing electrode Tx
1-Tx
nTouch scanning signals St
1-St
nOverlapping on sequential top, this, length was preferably 1 the scanning time that the period continued overlapping time.
Particularly, at the 1st scanning period T1, the first sensing electrode Tx
1With Tx
2Be in scanning mode, the touch scanning signals St of electronegative potential is provided
1, St
2To the first sensing electrode Tx
1, Tx
2, the touch scanning signals St of noble potential is provided
3-St
nTo the first sensing electrode Tx that is not in scanning mode
3-Tx
n
At the 2nd scanning period T2, the first sensing electrode Tx
3With Tx
4Be in scanning mode, and the touch scanning signals St of electronegative potential is provided
3, St
4To the first sensing electrode Tx
3, Tx
4, the touch scanning signals St of noble potential is provided simultaneously
1-St
2And St
5-St
nTo the first sensing electrode Tx that is not in scanning mode
1-Tx
2And Tx
5-Tx
n
At the 3rd scanning period T3, the first sensing electrode Tx
1With Tx
nBe in scanning mode, and the St of output electronegative potential
1, St
nTo the first sensing electrode Tx that is in scanning mode
1, Tx
n, export the St of noble potential simultaneously
2-St (
N-1)To the first sensing electrode Tx that is not in scanning mode
2-Tx
n
And the like, be scanned up to n scanning period Tn, until the sweep time of finishing a frame.
See also Fig. 1 and Fig. 7, a plurality of touch scanning signals St that it provides in a vertical interval for driving circuit 12
1-St
nThe sequential chart of the 5th embodiment, any one scanning period Ti of each frame scan period, touch scanning signals to 2 non-adjacent locational first sensing electrode 11 of two electronegative potentials is provided, mode with order or non-order scans this a plurality of first sensing electrode Tx1-Txn, that is to say, arbitrary scan period Ti, the first sensing electrode Txj and first sensing electrode 11 except Tx (j-1) and Tx (j+1) are in scanning mode.
Particularly, as shown in Figure 7:
At the first scanning period T1, the first sensing electrode Tx
1With Tx
4Be in scanning mode, and the touch scanning signals St of electronegative potential is provided
1, St
4To the first sensing electrode Tx
1, Tx
4, the touch scanning signals St of noble potential is provided simultaneously
2-St
3And St
5-St
nTo the first sensing electrode Tx that is not in scanning mode
2-Tx3 and Tx
5-Tx
n
At the second scanning period T2, the first sensing electrode Tx
2With Tx
nBe in scanning mode, and the touch scanning signals St of electronegative potential is provided
2, St
nTo the first sensing electrode Tx
2, Tx
n, export the touch scanning signals St of noble potential simultaneously
1And St
3-St
(n-1)To the first sensing electrode Tx that is not in scanning mode
1And Tx
3-Tx
(n-1)
At the 3rd scanning period T3, the first sensing electrode Tx
1With Tx
3Be in scanning mode, and the touch scanning signals St of electronegative potential is provided
1, St
3To the first sensing electrode Tx
1, Tx
3, the touch scanning signals St of noble potential is provided simultaneously
2And St
4-St
nTo the first sensing electrode Tx that is not in scanning mode
2And Tx
4-Tx
n
And the like, until the n scanning period, finish a vertical interval turntable driving.
Fig. 8 drives the process flow diagram of the driving method of touch sensing device 10 for the present invention, and the sequential chart of the driving signal that provides according to above-mentioned five illustrational driving circuits 12 can obtain the driving method of this touch sensing device 10, and this driving method comprises step:
Step S101 in each scanning period T, provides a plurality of touch scanning signals St simultaneously
1-St
nTo these a plurality of first sensing electrode Tx
1-Tx
n
Step S102 provides the touch scanning signals St of electronegative potential
1-St
nGive corresponding first sensing electrode 11, be in the state that is scanned to characterize this corresponding first sensing electrode; The touch scanning signals St of noble potential is provided
1-St
nGive remaining first sensing electrode 11, be in the state that is not scanned to characterize this remaining first sensing electrode 11.
Preferably, any one scanning period T selects first a sensing electrode Tx in each vertical interval
1-Tx
n, and export corresponding current potential touch scanning signals St
1-St
nTo this first sensing electrode Tx
1-Tx
n
More preferably, according to these a plurality of first sensing electrode Tx
1-Tx
nPut in order, scan first a sensing electrode Tx successively
1-Tx
n
Preferably, in each scanning period, the touch scanning signals of electronegative potential only is provided for a first sensing electrode, and wherein, a is preferably the natural number of getting less than n/2, and n is the sum of this first sensing electrode, and n is the natural number greater than 1.
More preferably, according to these a plurality of first sensing electrode Tx
1-Tx
nPut in order and provide the touch scanning signals of this electronegative potential to this a first sensing electrode successively.
More preferably, these a plurality of first sensing electrode Tx
1-Tx
nTouch scanning signals St
1-St
nOverlapping on sequential top.
More preferably, these a plurality of first sensing electrode Tx
1-Tx
nTouch scanning signals St
1-St
nEqual the duration T of 1 scanning period in the overlapping time span in sequential top.
More preferably, adjacent two first sensing electrode Tx
1-Tx
nTouch scanning signals St
1-St
nOverlapping on sequential top.
More preferably, this a first sensing electrode Tx
1-Tx
nNon-conterminous on the position.
Claims (10)
1. the driving method of a touch sensing device, this touch sensing device comprises a plurality of first sensing electrodes of arranging along first direction, a plurality of second sensing electrodes of arranging and intersecting with these a plurality of first sensing electrode electrical isolations along second direction, these a plurality of second sensing electrodes are used for responding the touch scanning signals that is carried on these a plurality of first sensing electrodes and export a plurality of touch-control sensing signals, wherein, the minimum duration that these a plurality of touch scanning signals are carried on these a plurality of first sensing electrodes is defined as the one scan period, and this driving method comprises:
In each scanning period, load a plurality of touch scanning signals simultaneously to these a plurality of first sensing electrodes, provide the touch scanning signals of electronegative potential to be in the state that is scanned to corresponding first sensing electrode to characterize this corresponding first sensing electrode, provide the touch scanning signals of noble potential to be in the state that is not scanned to characterize this remaining first sensing electrode for remaining first sensing electrode.
2. the driving method of touch sensing device as claimed in claim 1 is characterized in that, each scanning time that the period continued is all identical.
3. the driving method of touch sensing device as claimed in claim 2 is characterized in that, it further is included in and inserts between the adjacent scanning period delay period, provides the touch scanning signals of electronegative potential to corresponding first sensing electrode in this delay period.
4. as the driving method of any described touch sensing device of claim 1 to 3, it is characterized in that, in each scanning period, the touch scanning signals of electronegative potential only is provided for a first sensing electrode, wherein, a gets the natural number less than n/2, and n is the sum of this first sensing electrode, and n is the natural number greater than 1.
5. the driving method of touch sensing device as claimed in claim 4 is characterized in that, in a vertical interval, provides the touch scanning signals of this electronegative potential to this a first sensing electrode successively according to putting in order of these a plurality of first sensing electrodes.
6. the driving method of touch sensing device as claimed in claim 5 is characterized in that, the touch scanning signals of these a plurality of first sensing electrodes is overlapping on sequential top.
7. the driving method of touch sensing device as claimed in claim 6 is characterized in that, the touch scanning signals of these a plurality of first sensing electrodes equals the duration of 1 scanning period in the overlapping time span in sequential top.
8. the driving method of touch sensing device as claimed in claim 6 is characterized in that, the touch scanning signals of adjacent two first sensing electrodes is overlapping on sequential top.
9. the driving method of touch sensing device as claimed in claim 4 is characterized in that, this a first sensing electrode is non-conterminous on the position.
10. touch sensing device, comprise: a plurality of first sensing electrodes of arranging along first direction, a plurality of second sensing electrodes of arranging and intersecting with these a plurality of first sensing electrode electrical isolations along second direction, these a plurality of second sensing electrodes are used for responding the touch scanning signals that is carried on these a plurality of first sensing electrodes and export a plurality of touch-control sensing signals, wherein, the minimum duration that these a plurality of touch scanning signals are carried on these a plurality of first sensing electrodes is defined as the one scan period, it is characterized in that, in each scanning period, load a plurality of touch scanning signals simultaneously to these a plurality of first sensing electrodes, provide the touch scanning signals of electronegative potential to be in the state that is scanned to corresponding first sensing electrode to characterize this corresponding first sensing electrode, provide the touch scanning signals of noble potential to be in the state that is not scanned to characterize this remaining first sensing electrode for remaining first sensing electrode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310243625.6A CN103336644B (en) | 2013-06-19 | 2013-06-19 | Touch sensing device and driving method thereof |
| TW102125028A TWI512562B (en) | 2013-06-19 | 2013-07-12 | Touch-sensitive device and a driving method of driving the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310243625.6A CN103336644B (en) | 2013-06-19 | 2013-06-19 | Touch sensing device and driving method thereof |
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| Publication Number | Publication Date |
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| CN103336644A true CN103336644A (en) | 2013-10-02 |
| CN103336644B CN103336644B (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310243625.6A Expired - Fee Related CN103336644B (en) | 2013-06-19 | 2013-06-19 | Touch sensing device and driving method thereof |
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| CN (1) | CN103336644B (en) |
| TW (1) | TWI512562B (en) |
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| CN103970337A (en) * | 2013-10-21 | 2014-08-06 | 上海中航光电子有限公司 | Touch scanning method of touch screen and touch scanning control circuit and display device of touch screen |
| CN103995633A (en) * | 2014-05-06 | 2014-08-20 | 京东方科技集团股份有限公司 | Touch display device and drive method thereof |
| CN104750303A (en) * | 2013-12-27 | 2015-07-01 | 乐金显示有限公司 | Touch system, touch panel, and display device |
| CN113031800A (en) * | 2019-12-25 | 2021-06-25 | 纬创资通股份有限公司 | Touch device and judgment method thereof |
| CN113589962A (en) * | 2020-04-30 | 2021-11-02 | 奇景光电股份有限公司 | Touch control equipment and touch control driving device and operation method thereof |
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| US9996187B2 (en) * | 2015-05-28 | 2018-06-12 | Novatek Microelectronics Corp. | Touch control module for touch device and related touch control method |
| US10474288B2 (en) | 2015-05-28 | 2019-11-12 | Novatek Microelectronics Corp. | Touch control method for touch device |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201516772A (en) | 2015-05-01 |
| CN103336644B (en) | 2016-06-08 |
| TWI512562B (en) | 2015-12-11 |
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