CN102810031A

CN102810031A - Multi-point touch detection method and device thereof

Info

Publication number: CN102810031A
Application number: CN2011101517702A
Authority: CN
Inventors: 林招庆; 祝林; 黄柏勋
Original assignee: SHENGDA SCIENCE AND TECHNOLOGY Co Ltd
Current assignee: SHENGDA SCIENCE AND TECHNOLOGY Co Ltd
Priority date: 2011-05-30
Filing date: 2011-05-30
Publication date: 2012-12-05

Abstract

The invention provides a multi-point touch detection method, which is applied to a touch control board. The touch control board comprises a baseplate, a plurality of first electrode arrays and a plurality of second electrode arrays; the first electrode arrays are arranged on the surface of the baseplate in the first direction; and the second electrode arrays are arranged on the surface of the baseplate in the second direction perpendicular to the first direction, and are staggered with the first electrode arrays. In the multi-point touch detection method, a self-induction type capacitance measurement method is adopted to detect the capacitance changes of the first electrode arrays and the second electrode arrays firstly, so as to determine the first electrode arrays and the second electrode arrays which are candidates; then a mutual inductance type capacitance measurement method is adopted to detect the capacitance changes between the candidate first electrode arrays and the candidate second electrode arrays; and multi-point touch positions on the touch control board can be determined according to the capacitance changes between the candidate first electrode arrays and the candidate second electrode arrays.

Description

Multi-point touch method for detecting and device thereof

Technical field

The present invention relates to a kind of touch detection method and device thereof, particularly relate to a kind of multi-point touch method for detecting and device thereof.

Background technology

Along with the appearance of large tracts of land multi-point touch functional product, the capacitive touch control techniques is being played the part of very important role.

The conventional condenser contact panel mainly comes detecting multi-point touch with self-induction type or mutual inductance type electric capacitance measurement method; Wherein the detecting of self-induction type multi-point touch is as shown in Figure 1; Mainly be that a controller (figure does not show) is by the directions X electrodes series X1-X4 on the Trackpad 10 is discharged and recharged; And Y direction electrodes series Y1-Y7 is discharged and recharged, measure the capacitance variations on directions X electrodes series X1-X4 and the Y direction electrodes series Y1-Y7, to detect the position that Trackpad 10 is touched.When supposing that two fingers are touched Trackpad 10 simultaneously, because the position of finger is to lay respectively at electrodes series X2, X4 and electrodes series Y3, Y5 top, so controller (figure does not show) can sense electrodes series X2, X4 and Y3, the last capacitance variations of Y5; And judge that touch position occurs on the cross-point of electrodes series X2, X4 and Y3, Y5; But because the cross-point of electrodes series X2, X4 and Y3, Y5 has four (X2, Y3), (X2, Y5), (X4, Y3) and (X4, Y5), controller can't accurately judge actual 2 of touching be (X2, Y3), (X4; Y5) this 2 point; Still (X2, Y5), (X4, Y3) this 2 point (industry is referred to as terrible point (Ghost Points)); There is the terrible point of erroneous judgement (Ghost Points) to take place easily, and must judges the practical touch position through rear end complex mathematical computing again for the situation of practical touch point.

Therefore; For addressing the above problem; Another kind of mutual inductance type multi-point touch detecting mode is as shown in Figure 2, and controller is by sending electric signal to each directions X electrodes series X1-X4 in regular turn, and measures at these Y direction electrodes series Y1-Y7 in regular turn; By touching and the capacitance variations when touching is arranged in nothing between the electrode of the electrode that measures the directions X electrodes series and Y direction electrodes series, can correctly detect the position that multiple spot touches.Yet the scanning times of this kind detecting mode is many; With Fig. 2 is example; Need scanning 28 times (4 (directions X) * 7 times (Y direction)) could detect whole electrodes, but the detecting of the self-induction type of Fig. 1 need scan 11 times (4 (directions X discharges and recharges)+7 time (the Y direction discharges and recharges)); Discharging and recharging often of this kind detecting mode increase power consumption, and the capacitance change between directions X electrode and the Y direction electrode is little in addition, disturbs because of extraneous noise easily and judges by accident.

This shows that above-mentioned existing capacitance type touch-control panel obviously still has inconvenience and defective, and demands urgently further improving in method, product structure and use.Therefore how to found a kind of new multi-point touch method for detecting and device thereof, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.

Summary of the invention

The objective of the invention is to; Overcome the defective that existing capacitance type touch-control panel exists; And a kind of new multi-point touch method for detecting and device thereof, technical matters to be solved are provided is to make it be to provide a kind of combination self-induction type and mutual inductance type electric capacitance measurement advantage, to reduce scanning times and power consumption; And correctly judge and the multi-point touch method for detecting and the device thereof of touch position be very suitable for practicality.

The object of the invention and solve its technical matters and adopt following technical scheme to realize.A kind of multi-point touch method for detecting according to the present invention's proposition; Be applied to a Trackpad, this Trackpad comprises a substrate, and a plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction; And second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; Wherein: this multi-point touch method for detecting comprises: (A) provide one first electric signal to this first electrodes series respectively; And detect the capacitance variations of these first electrodes series and these second electrodes series, provide one second electric signal to this second electrodes series respectively again, and detect the capacitance variations of these first electrodes series and these second electrodes series; With capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series; And (B) provide one the 3rd electric signal to this candidate's first electrodes series respectively; And respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively of detecting at least; With according to this candidate's at least respectively first electrodes series and the capacitance variations between this candidate's second electrodes series respectively, judge the position of multi-point touch on this Trackpad.

The object of the invention and solve its technical matters and also can adopt following technical measures further to realize.

Aforesaid multi-point touch method for detecting; Wherein said in step (A), when providing this first electric signal when respectively this first electrodes series discharges and recharges, these second electrodes series are grounded; To detect the capacitance variations of these first electrodes series; And when providing this second electric signal when respectively this second electrodes series discharges and recharges, these first electrodes series are grounded, to detect the capacitance variations of these second electrodes series.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said: in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting; Wherein said in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch method for detecting, wherein said in step (A), be to make this electric signal in regular turn to respectively this first electrodes series charging, and when this electric signal when one of them charges to these first electrodes series, other first electrodes series ground connection.

Aforesaid multi-point touch method for detecting; Wherein said in step (A); Be to make this electric signal in regular turn to respectively this first electrodes series charging, and when this electric signal when one of them charges to these first electrodes series, other first electrodes series ground connection close with this first electrodes series that is recharged.

Aforesaid multi-point touch method for detecting, wherein said in step (A), be to make this electric signal approaching synchronously to respectively this first electrodes series charging, and when to one of them charging of these first electrodes series, other first electrodes series ground connection.

Aforesaid multi-point touch method for detecting, wherein said in step (A), be to make this electric signal synchronously to respectively this first electrodes series charging.

The object of the invention and solve its technical matters and also adopt following technical scheme to realize.A kind of multi-point touch method for detecting according to the present invention's proposition; Be applied to a Trackpad; This Trackpad comprises a substrate, and a plurality of edges one first direction is laid in first electrodes series on the surface of this substrate, and a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction; And second electrodes series that staggers mutually with these first electrodes series; And respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series, and wherein: this multi-point touch method for detecting comprises: the capacitance variations of (A) detecting these first electrodes series and these second electrodes series with self-induction type electric capacitance measurement method; With capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series; And (B) with these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and the capacitance variations between these candidates' second electrodes series at least; With according to these candidates' first electrodes series and the capacitance variations between these candidates' second electrodes series at least, judge the position of multi-point touch on this Trackpad.

The object of the invention and solve its technical matters and also adopt following technical scheme to realize in addition.A kind of multi-point touch arrangement for detecting according to the present invention's proposition; Wherein: this multi-point touch arrangement for detecting; Comprise: a Trackpad, comprise a substrate, a plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction; And second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; An and controller; With these first electrodes series and these second electrodes series electric couplings; And with the capacitance variations of these first electrodes series of self-induction type electric capacitance measurement method detecting and these second electrodes series; With the capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series are again with the capacitance variations between these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and these candidates' second electrodes series; With according to the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series, judge the position of multi-point touch on this Trackpad.

Aforesaid multi-point touch arrangement for detecting; Wherein said this self-induction type electric capacitance measurement method provides one first electric signal and gives respectively this first electrodes series; And detect the capacitance variations of these first electrodes series and these second electrodes series; Provide one second electric signal to this second electrodes series respectively again; And detect the capacitance variations of these first electrodes series and these second electrodes series, and this mutual inductance type electric capacitance measurement method provides the 3rd electric signal and gives respectively this candidate's first electrodes series, and detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

Aforesaid multi-point touch arrangement for detecting; Wherein said this controller provides this first electric signal that this first electrodes series is is respectively discharged and recharged; And,, provide this second electric signal that this second electrodes series is is respectively discharged and recharged again to detect the capacitance variations of these first electrodes series with these second electrodes series ground connection; And with these first electrodes series ground connection, to detect the capacitance variations of these second electrodes series.

Aforesaid multi-point touch arrangement for detecting; Wherein said this controller provides the 3rd electric signal to this candidate's first electrodes series respectively in regular turn; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively

The object of the invention and solve its technical matters and adopt following technical scheme to realize in addition again.A kind of multi-point touch arrangement for detecting according to the present invention's proposition; Wherein: this multi-point touch arrangement for detecting; Comprise: a Trackpad, comprise a substrate, a plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction; And second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; And means; In order to detect the capacitance variations of these first electrodes series and these second electrodes series; First electrodes series and second electrodes series with the decision candidate; And then detect the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series, to judge the position of multi-point touch on this Trackpad.

The present invention compared with prior art has tangible advantage and beneficial effect.Can be known that by above technical scheme major technique of the present invention thes contents are as follows: the multi-point touch method for detecting is applied to a Trackpad; This Trackpad comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate, and a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series; And respectively this first electrodes series comprises a plurality of first electrodes that are in series; Respectively this second electrodes series comprises a plurality of second electrodes that are in series, and this method comprises: (A) provide one first electric signal to this first electrodes series respectively, and detect the capacitance variations of these first electrodes series and these second electrodes series; Provide one second electric signal to this second electrodes series respectively again; And detect the capacitance variations of these first electrodes series and these second electrodes series, and with capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series; And (B) provide one the 3rd electric signal to this candidate's first electrodes series respectively; And respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively of detecting at least; With according to this candidate's at least respectively first electrodes series and the capacitance variations between this candidate's second electrodes series respectively, judge the position of multi-point touch on this Trackpad.Preferably; In step (A), when providing this first electric signal when respectively this first electrodes series discharges and recharges, these second electrodes series are grounded; To detect the capacitance variations of these first electrodes series; And when providing this second electric signal when respectively this second electrodes series discharges and recharges, these first electrodes series are grounded, to detect the capacitance variations of these second electrodes series.Preferably; In step (B); Be to provide the 3rd electric signal in regular turn, and in regular turn this candidate's second electrodes series respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively to this candidate's first electrodes series respectively.Preferably; In step (B); Be to provide the 3rd electric signal in regular turn, and simultaneously these candidates' second electrodes series measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively to this candidate's first electrodes series respectively.Preferably; In step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; In step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably, in step (A), be to make this electric signal in regular turn to respectively this first electrodes series charging, and when this electric signal when one of them charges to these first electrodes series, other first electrodes series ground connection.Preferably, in step (A), be to make this electric signal in regular turn to respectively this first electrodes series charging, and when this electric signal when one of them charges to these first electrodes series, other first electrodes series ground connection close with this first electrodes series that is recharged.Preferably, in step (A), be to make this electric signal approaching synchronously to respectively this first electrodes series charging, and when to one of them charging of these first electrodes series, other first electrodes series ground connection.Preferably, in step (A), be to make this electric signal synchronously to respectively this first electrodes series charging.In addition; A kind of multi-point touch method for detecting of the present invention is applied to a Trackpad, and this Trackpad comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series; Respectively this second electrodes series comprises a plurality of second electrodes that are in series; This method comprises: (A) with the capacitance variations of self-induction type electric capacitance measurement method these first electrodes series of detecting and these second electrodes series, with the capacitance variations according to these first electrodes series and these second electrodes series, determine candidate's first electrodes series and second electrodes series; And (B) with these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and the capacitance variations between these candidates' second electrodes series at least; With according to these candidates' first electrodes series and the capacitance variations between these candidates' second electrodes series at least, judge the position of multi-point touch on this Trackpad.Moreover the present invention realizes a kind of multi-point touch arrangement for detecting of said method, comprises a Trackpad and a controller.This Trackpad comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction; And second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; This controller and these first electrodes series and these second electrodes series electric couplings; And with the capacitance variations of these first electrodes series of self-induction type electric capacitance measurement method detecting and these second electrodes series; With capacitance variations according to these first electrodes series and these second electrodes series; Decision candidate's first electrodes series and second electrodes series; Again with the capacitance variations between these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and these candidates' second electrodes series,, judge the position of multi-point touch on this Trackpad with according to the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series.Preferably; This self-induction type electric capacitance measurement method provides one first electric signal and gives respectively this first electrodes series; And detect the capacitance variations of these first electrodes series and these second electrodes series; Provide one second electric signal to this second electrodes series respectively again; And detect the capacitance variations of these first electrodes series and these second electrodes series, and this mutual inductance type electric capacitance measurement method provides the 3rd electric signal and gives respectively this candidate's first electrodes series, and detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Preferably; This controller provides this first electric signal that this first electrodes series is is respectively discharged and recharged; And,, provide this second electric signal that this second electrodes series is is respectively discharged and recharged again to detect the capacitance variations of these first electrodes series with these second electrodes series ground connection; And with these first electrodes series ground connection, to detect the capacitance variations of these second electrodes series.Preferably; This controller provides the 3rd electric signal to this candidate's first electrodes series respectively in regular turn; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.Moreover the present invention realizes the another kind of multi-point touch arrangement for detecting of said method, comprises a Trackpad; It comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate, and a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series; And respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; And means; It is in order to detect the capacitance variations of these first electrodes series and these second electrodes series; First electrodes series and second electrodes series with the decision candidate; And then detect the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series, to judge the position of multi-point touch on this Trackpad.

By technique scheme; Multi-point touch method for detecting of the present invention and device thereof have advantage and beneficial effect at least: utilize these first electrodes series of self-induction type electric capacitance measurement method detecting Trackpad and the capacitance variations of second electrodes series earlier; Find out the candidate's that multi-point touch takes place first electrodes series and candidate's second electrodes series; Again with the capacitance variations between mutual inductance type electric capacitance measurement method detecting candidate's first electrodes series and candidate's second electrodes series; Further confirm the multi-point touch position, not only do not need the complex mathematical computing can judge correct multi-point touch position, and reduce the number of times of scanning; Reduce system power consumption, reach effect of the present invention and purpose really.

Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of instructions, and for let above and other objects of the present invention, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.

Description of drawings

Fig. 1 explains existing a kind of method of coming detecting multi-point touch with the self-induction type electric capacitance measurement.

Fig. 2 explains existing a kind of method of coming detecting multi-point touch with the mutual inductance type electric capacitance measurement.

Fig. 3 is the process flow diagram of a preferred embodiment of multi-point touch method for detecting of the present invention.

Fig. 4 is the assembly synoptic diagram that a preferred embodiment of multi-point touch arrangement for detecting of the present invention is comprised.

Fig. 5 is the organigram of first electrodes series and second electrodes series of present embodiment, and its explanation is under the situation of 2 touchings simultaneously, and present embodiment decides candidate's first electrodes series and candidate's second electrodes series with self-induction type electric capacitance measurement method.

Fig. 6 explains between first electrodes series and second electrodes series of present embodiment can produce coupling capacitance, and under 2 situation of touching Trackpad simultaneously, can produce on first electrodes series of corresponding touch position and second electrodes series and point electric capacity.

Fig. 7 explains finger electric capacity that the finger touches Trackpad is produced and corresponding to the relation of the coupling capacitance between the candidate's of touch position first electrodes series and candidate's second electrodes series.

Fig. 8 explains present embodiment under 3 situation of touching Trackpad simultaneously, and present embodiment decides candidate's first electrodes series and candidate's second electrodes series with self-induction type electric capacitance measurement method.

Fig. 9 explains that present embodiment under 3 situation of touching Trackpad simultaneously, can produce finger electric capacity on first electrodes series of corresponding touch position and second electrodes series.

Figure 10 explains finger electric capacity that the finger touches Trackpad is produced and corresponding to the relation of the coupling capacitance between the candidate's of touch position first electrodes series and candidate's second electrodes series.

Embodiment

Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To the multi-point touch method for detecting that proposes according to the present invention and install its embodiment, method, step, structure, characteristic and effect thereof, specify as after.

Seeing also Fig. 3, be the process flow diagram of a preferred embodiment of multi-point touch method for detecting of the present invention, and see also Fig. 4, is the preferred embodiment that the present invention realizes the multi-point touch arrangement for detecting of said method.

The multi-point touch arrangement for detecting of present embodiment comprises a Trackpad 10 and a controller 11.Trackpad 10 comprises a substrate 12 (a for example transparent glass substrate), one be laid in substrate 12 one the surface an ITO conductive film 13, and one be laid in substrate 12 another the surface the 2nd ITO conductive film 15.And it is as shown in Figure 5; Form first electrodes series 14 that a plurality of edges one first direction is arranged on the one ITO conductive film 13; Generally be vertical second direction arrangement and form a plurality of edges one on the 2nd ITO conductive film 15 with this first direction; And second electrodes series 16 that staggers mutually with these first electrodes series 14, and respectively this first electrodes series 14 comprises a plurality of first electrodes 17 that are in series, and respectively this second electrodes series 16 comprises a plurality of second electrodes 18 that are in series.Again these first electrodes series 14 and these second electrodes series 16 all with controller 11 electric couplings.

In addition, can an ITO conductive film 13 and the 2nd ITO conductive film 15 distinctly be laid in two substrate surfaces that separate, again with two substrates to pasting, an ITO conductive film 13 is insulated with the 2nd ITO conductive film 15 mutually.

As shown in Figure 5; First electrodes series 14 of supposing present embodiment has four, representes with X1-X4 respectively, and second electrodes series 16 has 7; Represent with Y1-Y7 respectively; When on Trackpad 10,2 touchings (two solid dot as shown in Figure 5) taking place, present embodiment multi-point touch sensing method is detected the capacitance variations of these first electrodes series 14 and these second electrodes series 16 earlier with self-induction type electric capacitance measurement method shown in the step 41 of Fig. 3.That is; Trackpad 10 is under the state that starts; Controller 11 can provide one first electric signal that these first electrodes series 14 are discharged and recharged; Provide one second electric signal that these second electrodes series 16 are discharged and recharged (perhaps earlier these second electrodes series 16 are discharged and recharged, these first electrodes series 14 are discharged and recharged again) again, to detect the capacitance variations of these first electrodes series 14 and second electrodes series 16.

As shown in Figure 6; Because existence one coupling capacitance CP1-CP7 between second electrode 161 of first electrode 141 of each first electrodes series X1-X4 and staggered these second electrodes series Y1-Y7; And first the coupling capacitance Cx between electrodes series X1-X4 and the ground; When controller 11 provided one first electric signal that these first electrodes series X1-X4 is discharged and recharged, these second electrodes series Y1-Y7 was grounded, and these first electrodes series X1, X2, X3, the X4 charging to each in regular turn of this first electric signal; When one of them was recharged as these first electrodes series X1-X4, other first electrodes series was grounded.Perhaps, this first electric signal these first electrodes series X1, X2, X3, X4 charging to each in regular turn; When one of them was recharged as these first electrodes series X1-X4, other first electrodes series close with this first electrodes series that is recharged was grounded.Or, this first electric signal be near synchronously to this first electrodes series X1 respectively, X2, X3, X4 charging, and when first electric signal when one of them charges to these first electrodes series X1, X2, X3, X4, other first electrodes series is grounded.Moreover this first electric signal also can be synchronously to respectively this first electrodes series X1, X2, X3, X4 charging.

Therefore when have no conductive body to touch Trackpad 10, the inductance capacitance Cs between each the first electrodes series X1-X4 and the second electrodes series Y1-Y7 that interlocks is (the Cs=Cptal=Cx+CP1+CP2+ that fixes ... CP7, electric capacity parallel connection, capacitance addition).When two fingers touch Trackpad 10; And when laying respectively at the first electrodes series X2, X4 top (this moment, two fingers also laid respectively at the second electrodes series Y3, Y5 top); The first electrodes series X2, X4 can be respectively with finger between produce between the intersection point of a finger capacitor C Fx parallelly connected and finger and electrodes series X2, Y3 with coupling capacitance Cp1-Cp7, intersection point capacitor C Fxy between the intersection point of finger and electrodes series X4, Y5; Make the inductance capacitance Cs of the first electrodes series X2, X4 increase (Cs=Cptal+CFxy+CFx); Therefore like step 42; Controller 11 is by the capacitance variations of these first electrodes series of detecting X1-X4, and the decidable touch location occurs in the first electrodes series X2, X4, and determines that the first electrodes series X2, X4 are candidate's electrodes series.

Then; Controller 11 provides one second electric signal that these second electrodes series 161 are discharged and recharged; And these first electrodes series 141 are grounded, at this moment, there is a coupling capacitance Cy between the second electrodes series Y1-Y7 and the ground; Likewise; Controller 11 detect have no conductive body near the second electrodes series Y1, Y2, Y4, Y6, Y7 and these first electrodes series 141 between inductance capacitance fix, the second electrodes series Y3 of finger above it, Y5 are arranged then because respectively and produce a finger capacitor C Fy between the finger, and the intersection point capacitor C Fxy between the intersection point of finger and electrodes series X2, Y3, between the intersection point of finger and electrodes series X4, Y5; Make its inductance capacitance Cs increase (Cs=Cptal+CFxy+CFy); Therefore controller 11 can change by the inductance capacitance Cs of these second electrodes series 161 of detecting, judges that touch location occurs in the second electrodes series Y3, Y5 is last, and determines that the second electrodes series Y3, Y5 are candidate's electrodes series.

So far; Controller 11 can confirm that touch location is to drop on the intersection point of candidate's the first electrode body X2, X4 and candidate's the second electrodes series Y3, Y5, but because of candidate's the first electrodes series X2, X4 and candidate's the second electrodes series Y3, Y5 can interlock four coordinate positions (X2, Y3), (X2; Y5), (X4; Y3) and (X4, Y5), it is those two coordinate positions wherein that controller 11 still is no judge of the practical touch position.

Therefore, like step 43, controller 11 is detected these candidates' the first electrodes series X2, X4 and these candidates' the second electrodes series Y3, the capacitance variations between the Y5 with mutual inductance type electric capacitance measurement method.That is; Controller 11 provides first electrodes series X2, the X4 of one the 3rd electric signal to the candidate in regular turn; And measure candidate's the second electrodes series Y3, one the 4th electric signal of Y5, with detecting respectively this first electrodes series X2, X4 and the capacitance variations between this second electrodes series Y3, the Y5 respectively.

If controller 11 is that first electrodes series X2, the X4 of the 3rd electric signal to the candidate are provided in regular turn; And measure candidate's the second electrodes series Y3, the 4th electric signal of Y5 in regular turn; As shown in Figure 7; Owing to first electrode 17 of the first electrodes series X2 and the second electrodes series Y3 staggered place, can have single coupling capacitance CP3 between 18; And first electrode 17 of first electrodes series X4 and the second electrodes series Y5 staggered place, can there be single coupling capacitance CP5 between 18; When two fingers are touched Trackpad 10 simultaneously and laid respectively at intervening portion (X2, the Y3) top of the first electrodes series X2 and the second electrodes series Y3; And first during intervening portion (X4, the Y5) top (as shown in Figure 5) of electrodes series X4 and the second electrodes series Y5; When controller 11 provide earlier the 3rd electric signal to the candidate the first electrodes series X2 and when measuring candidate's the 4th electric signal of the second electrodes series Y3 since wherein a touching finger except and the intersection point of electrodes series X2, Y3 between produce the intersection point capacitor C Fx1y1, this finger can and the first electrodes series X2 between produce a finger capacitor C Fx1; And and the second electrodes series Y3 between can produce a finger capacitor C Fy1; And influence the electric field of coupling capacitance CP 3 and changed two electrodes 17, the electric capacity between 18, controller 11 can according to before the touching that on the second electrodes series Y3, records with touching after change in electric amount (or capacitance change), judge that finger touches is the intervening portion (X2, Y3) that occurs in the first electrodes series X2 and the second electrodes series Y3.Then; When controller 11 measures candidate's the 4th electric signal of the second electrodes series Y5 again; Because the electric field of the coupling capacitance CP5 of the first electrodes series X2 and the second electrodes series Y5 staggered place does not receive the influence of finger touches; So controller 11 can record the change in electric amount hardly on the second electrodes series Y5, and confirm that the intervening portion (X2, Y5) of the first electrodes series X2 and the second electrodes series Y5 is not the finger touches position.

Then; Controller 11 provide the 3rd electric signal to the candidate another first electrodes series X4 and when measuring candidate's the 4th electric signal of the second electrodes series Y3; Because the electric field of the coupling capacitance CP3 of the first electrodes series X4 and the second electrodes series Y3 staggered place does not receive the influence of finger touches; So controller 11 can record change in electric amount (or capacitance change) hardly on the second electrodes series Y3, and judges that the intervening portion (X4, Y3) of the first electrodes series X4 and the second electrodes series Y3 is not the finger touches position.Then; Controller 11 measures the 4th electric signal of another second electrodes series Y5 of candidate; At this moment; Since another touching finger except and the intersection point of electrodes series X4, Y5 between produce the intersection point capacitor C Fx2y2, this finger can and the first electrodes series X4 between produce another finger capacitor C Fx2, and and the second electrodes series Y5 between can produce a finger capacitor C Fy2; And influence the electric field of coupling capacitance CP5 and changed electrode 17, the electric capacity between 18; Therefore, controller 11 can according to before the touching that on the second electrodes series Y5, records with touching after change in electric amount (or capacitance change), judge that finger touches is the intervening portion (X4, Y5) that occurs in the first electrodes series X4 and the second electrodes series Y5.

In addition; Controller 11 is except provide first electrodes series X2, the X4 of the 3rd electric signal to the candidate in regular turn; Outside the 4th electric signal with the second electrodes series Y3 that measures the candidate, Y5; Because the 3rd electric signal is an AC signal; For example can be a triangular wave, string ripple, square wave or pwm signal; If provide the unlike signal that can be picked out (for example phase place or frequency are different) to give the different candidate first electrodes series X2, X4 simultaneously, but the second electrodes series Y3, the Y5 identifiability of the basis signal source of differentiating its 4th electric signal still then, so controller 11 also can provide first electrodes series X2, the X4 of the 3rd electric signal of out of phase or frequency to the candidate simultaneously; And measure candidate's the second electrodes series Y3, the 4th electric signal of Y5, can record these candidates' the first electrodes series X2, X4 and these candidates' the second electrodes series Y3, the capacitance variations between the Y5 equally.

Whereby; Present embodiment only need carry out that 4 times (the first electrodes series X1-X4 is discharged and recharged)+7 times (the second electrodes series Y1-Y7 is discharged and recharged)+4 times (the first electrodes series X2, the X4 to the candidate provides electric signal in regular turn; And measure electric signal at candidate's the second electrodes series Y3, Y5; 2 * 2 times)=and 15 scanning, can accomplish detecting and precisely judge touch points.Merely with self-induction type electric capacitance measurement method detecting multi-point touch, assorted multiple computing need not carried out in the present embodiment rear end compared to tradition, can judge the position of multi-point touch efficiently; And need the action of 28 scannings merely with mutual inductance type electric capacitance measurement method detecting multi-point touch compared to tradition, and present embodiment has reduced the action of 13 scannings and has reduced power consumption, and when the electrodes series of need scanning is many more, the number of times that then reduces also can be many more.So the present invention can say so and combine the advantage of self-induction type electric capacitance measurement method and mutual inductance type electric capacitance measurement method.

In addition, controller 11 also can provide first electrodes series X2, the X4 of an electric signal to the candidate in regular turn, and (synchronously) measures candidate's the second electrodes series Y3, the electric signal of Y5 simultaneously.That is controller 11 is when providing the first electrodes series X2 of an electric signal to the candidate; Measure the electric signal of the second electrodes series Y3, Y5 simultaneously; And judge the finger touches position by the change in electric amount (or capacitance change) of the second electrodes series Y3 and the second electrodes series Y5 relatively; And owing to the change in electric amount (or capacitance change) of the second electrodes series Y3 that receives finger touches will be obviously greater than the change in electric amount (or capacitance change) of the second electrodes series Y5 that does not receive finger touches, controller thereby judgement finger touches occur in the intervening portion (X2, Y3) of the first electrodes series X2 and the second electrodes series Y3.In like manner; When controller 11 then provides another the first electrodes series X4 of an electric signal to the candidate; Measure the electric signal of the second electrodes series Y3, Y5 simultaneously; And by the change in electric amount (or capacitance change) that compares the second electrodes series Y3 and the second electrodes series Y5, promptly another finger touches of decidable is at the intervening portion that occurs in the first electrodes series X4 and the second electrodes series Y5 (X4, Y5).

Moreover controller 11 also can provide first electrodes series X2, the X4 of an electric signal to the candidate in regular turn, and simultaneously (synchronously) measurement candidate's the second electrodes series Y3, Y5 and other non-candidate's the second electrodes series Y1, Y2, Y4, Y6, the electric signal of Y7.That is controller 11 is when providing the first electrodes series X2 of an electric signal to the candidate; Measure the electric signal of all second electrodes series Y1-Y7 simultaneously; And by the change in electric amount (or capacitance change) that compares these second electrodes series Y1-Y7; Judge the finger touches position, its advantage is that the number of samples of second electrodes series comparison increases, and degree of accuracy can improve.Meaning promptly; Owing to receive the change in electric amount (or capacitance change) of the second electrodes series Y3 of finger touches will be obviously not receive the second electrodes series Y1, Y2, Y4, Y5, the Y6 of finger touches, the change in electric amount (or capacitance change) of Y7 greater than other all, controller 11 thereby can judge more definitely that finger touches occurs in the intervening portion of the first electrodes series X2 and the second electrodes series Y3 (X2, Y3).In like manner; When controller 11 then provides another the first electrodes series X4 of an electric signal to the candidate; Measure the electric signal of all second electrodes series Y1-Y7 simultaneously; And by the change in electric amount (or capacitance change) that compares these second electrodes series Y1-Y7, promptly another finger touches of decidable is at the intervening portion that occurs in the first electrodes series X4 and the second electrodes series Y5 (X4, Y5).

And; By above-mentioned candidate's the second electrodes series Y3, the mode of Y5 of measuring simultaneously; 4 times (the first electrodes series X1-X4 is discharged and recharged)+7 times (the second electrodes series Y1-Y7 is discharged and recharged)+4 times (the first electrodes series X2, the X4 to the candidate provides electric signal in regular turn only to need execution; And simultaneously candidate's the second electrodes series Y3, Y5 measured electric signal, 2 * 2 times)=15 scanning, can accomplish detecting and precisely judge touch points; Or for improving the scanning accuracy; And in regular turn to candidate's electrodes series X2, when X4 provides electric signal, and measure the electric signal of the second whole electrodes series Y1-Y7, so it need be carried out, and 4 times (the first electrodes series X1-X4 is discharged and recharged)+7 times (the second electrodes series Y1-Y7 is discharged and recharged)+14 times (the first electrodes series X2, the X4 to the candidate provides electric signal in regular turn; And the whole second electrodes series Y1-Y7 are measured electric signal (2 * 7 times))=25 scanning, can accomplish 2 touch detections.

See also shown in Figure 8 again; When three fingers (or three conductive bodies) are touched Trackpad 10 (three solid dot as shown in Figure 8) simultaneously, as stated, likewise; As shown in Figure 9; Controller 11 is found out the candidate's at touch position place the first electrodes series X2, X3, X4 earlier with self-induction type electric capacitance measurement method, and candidate's the second electrodes series Y1, Y3, Y6; And 9 possible touch position (shown in the hollow and solid dot of Fig. 9) because the first electrodes series X2, X3, X4 and the second electrodes series Y1, Y3, Y6 can interlock, still being not sure of correct touch position is those three.Therefore; Shown in figure 10; Controller 11 is detected the capacitance variations between the first electrodes series X2, X3, X4 and the second electrodes series Y1, Y3, the Y6 with above-mentioned mutual inductance type electric capacitance measurement method again, can confirm further that three finger touches positions are respectively in the staggered place of the staggered place of the staggered place of the first electrodes series X2 and the second electrodes series Y1 (X2, Y1), the first electrodes series X3 and the second electrodes series Y6 (X3, Y6) and the first electrodes series X4 and the second electrodes series Y3 (X4, Y3).

Know by Fig. 9 and shown in Figure 10; During 3 touchings of present embodiment detecting; 10 times (the first electrodes series X1-X10 is discharged and recharged)+10 times (the second electrodes series Y1-Y10 is discharged and recharged)+9 times (the first electrodes series X2, X3, the X4 to the candidate provides electric signal in regular turn only to need execution; And measure electric signal (3 * 3 times) at candidate's the second electrodes series Y1, Y3, Y6)=29 scanning; Perhaps carry out 10 times (the first electrodes series X1-X10 is discharged and recharged)+10 times (the second electrodes series Y1-Y10 is discharged and recharged)+30 times (the first electrodes series X2, X3, the X4 to the candidate provides electric signal in regular turn; And simultaneously to whole second electrodes series Y1-Y10) measure electric signal (3 * 10 times))=50 scanning, can accomplish 3 touch detections.

In sum; Present embodiment utilizes these first electrodes series X1-X10 and the capacitance variations of the second electrodes series Y1-Y10 on the above-mentioned self-induction type electric capacitance measurement method detecting Trackpad 10 earlier; With first electrodes series of finding out the candidate that multi-point touch takes place and candidate's second electrodes series; Again with the capacitance variations between mutual inductance type electric capacitance measurement method detecting candidate's first electrodes series and candidate's second electrodes series; And further confirm the multi-point touch position, not only do not need to use the complex mathematical computing can judge correct multi-point touch position, and can effectively reduce the number of times (existing convention mutual inductance type desired times is 10*10=100 time) of scanning like existing convention self-induction type; So can reduce system power consumption, reach effect of the present invention and purpose really.

The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.

Claims

1. a multi-point touch method for detecting is applied to a Trackpad, and this Trackpad comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series; Respectively this second electrodes series comprises a plurality of second electrodes that are in series, and it is characterized in that:

This multi-point touch method for detecting comprises:

(A) provide one first electric signal to this first electrodes series respectively; And detect the capacitance variations of these first electrodes series and these second electrodes series; Provide one second electric signal to this second electrodes series respectively again; And detect the capacitance variations of these first electrodes series and these second electrodes series, and with capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series; And

(B) provide one the 3rd electric signal to this candidate's first electrodes series respectively; And respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively of detecting at least; With according to this candidate's at least respectively first electrodes series and the capacitance variations between this candidate's second electrodes series respectively, judge the position of multi-point touch on this Trackpad.

2. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (A), when providing this first electric signal when respectively this first electrodes series discharges and recharges, these second electrodes series are grounded; To detect the capacitance variations of these first electrodes series; And when providing this second electric signal when respectively this second electrodes series discharges and recharges, these first electrodes series are grounded, to detect the capacitance variations of these second electrodes series.

3. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

4. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

5. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be to provide the 3rd electric signal in regular turn to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

6. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

7. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

8. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

9. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series is measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

10. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

11. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And in regular turn these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

12. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase and different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

13. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (B); Be the 3rd electric signal that out of phase or different frequency be provided simultaneously to this candidate's first electrodes series respectively; And simultaneously these candidates' second electrodes series and other non-candidate's second electrodes series are measured one the 4th electric signal, with first electrodes series of detecting these candidates and these non-candidates' second electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

14. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (A); Be to make this electric signal in regular turn to respectively this first electrodes series charging, and when this electric signal when one of them charges to these first electrodes series, other first electrodes series ground connection.

15. multi-point touch method for detecting as claimed in claim 1; It is characterized in that: in step (A); Be to make this electric signal in regular turn to respectively this first electrodes series charging; And when this electric signal to these first electrodes series one of them whens charging, other first electrodes series ground connection close with this first electrodes series that is recharged.

16. multi-point touch method for detecting as claimed in claim 1 is characterized in that: in step (A), be to make this electric signal approaching synchronously to respectively this first electrodes series charging, and when to one of them charging of these first electrodes series, other first electrodes series ground connection.

17. multi-point touch method for detecting as claimed in claim 1 is characterized in that: in step (A), be to make this electric signal synchronously to respectively this first electrodes series charging.

18. a multi-point touch method for detecting is applied to a Trackpad, this Trackpad comprises a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate; And a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series, and respectively this first electrodes series comprises a plurality of first electrodes that are in series; Respectively this second electrodes series comprises a plurality of second electrodes that are in series, and it is characterized in that:

This multi-point touch method for detecting comprises:

(A) with the capacitance variations of self-induction type electric capacitance measurement method these first electrodes series of detecting and these second electrodes series,, determine candidate's first electrodes series and second electrodes series with capacitance variations according to these first electrodes series and these second electrodes series; And

(B) with these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and the capacitance variations between these candidates' second electrodes series at least; With according to these candidates' first electrodes series and the capacitance variations between these candidates' second electrodes series at least, judge the position of multi-point touch on this Trackpad.

19. a multi-point touch arrangement for detecting is characterized in that:

This multi-point touch arrangement for detecting comprises:

One Trackpad; Comprise a substrate; A plurality of edges one first direction is laid in first electrodes series on the surface of this substrate, and a plurality of edges generally are the surface that vertical second direction is laid in this substrate with this first direction, and second electrodes series that staggers mutually with these first electrodes series; And respectively this first electrodes series comprises a plurality of first electrodes that are in series, and respectively this second electrodes series comprises a plurality of second electrodes that are in series; And

One controller; With these first electrodes series and these second electrodes series electric couplings; And with the capacitance variations of these first electrodes series of self-induction type electric capacitance measurement method detecting and these second electrodes series; With the capacitance variations according to these first electrodes series and these second electrodes series, decision candidate's first electrodes series and second electrodes series are again with the capacitance variations between these candidates' of mutual inductance type electric capacitance measurement method detecting first electrodes series and these candidates' second electrodes series; With according to the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series, judge the position of multi-point touch on this Trackpad.

20. multi-point touch arrangement for detecting as claimed in claim 19; It is characterized in that: this self-induction type electric capacitance measurement method provides one first electric signal and gives respectively this first electrodes series; And detect the capacitance variations of these first electrodes series and these second electrodes series; Provide one second electric signal to this second electrodes series respectively again; And detect the capacitance variations of these first electrodes series and these second electrodes series, and this mutual inductance type electric capacitance measurement method provides the 3rd electric signal and gives respectively this candidate's first electrodes series, and detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

21. multi-point touch arrangement for detecting as claimed in claim 20; It is characterized in that: this controller provides this first electric signal that this first electrodes series is is respectively discharged and recharged; And,, provide this second electric signal that this second electrodes series is is respectively discharged and recharged again to detect the capacitance variations of these first electrodes series with these second electrodes series ground connection; And with these first electrodes series ground connection, to detect the capacitance variations of these second electrodes series.

22. multi-point touch arrangement for detecting as claimed in claim 20; It is characterized in that: this controller provides the 3rd electric signal to this candidate's first electrodes series respectively in regular turn; And in regular turn this candidate's second electrodes series is respectively measured one the 4th electric signal, with detecting respectively this candidate's first electrodes series and the capacitance variations between this candidate's second electrodes series respectively.

23. a multi-point touch arrangement for detecting is characterized in that:

This multi-point touch arrangement for detecting comprises:

One means; In order to detect the capacitance variations of these first electrodes series and these second electrodes series; First electrodes series and second electrodes series with the decision candidate; And then detect the capacitance variations between these candidates' first electrodes series and these candidates' second electrodes series, to judge the position of multi-point touch on this Trackpad.