CN102819344B - The touch point coordinate determining method of tool anisotropic material film contact panel and device - Google Patents
The touch point coordinate determining method of tool anisotropic material film contact panel and device Download PDFInfo
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- CN102819344B CN102819344B CN201110164669.0A CN201110164669A CN102819344B CN 102819344 B CN102819344 B CN 102819344B CN 201110164669 A CN201110164669 A CN 201110164669A CN 102819344 B CN102819344 B CN 102819344B
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Abstract
The present invention proposes determining method and the device with the touch point coordinate of the contact panel of anisotropic material film.The method comprises the steps.Comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and relative and adjacent at least two the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, respectively drive actions is carried out to the conducting end comprised in these combinations simultaneously, wherein the conducting end comprised is combined in these combinations to charge simultaneously, then discharge simultaneously, and discharge time detect this and combine the signal intensity of conducting end comprised.Multiple numerical value corresponding to the signal intensity combined according to these, export the coordinate figure corresponded on this touch area.
Description
Technical field
The invention relates to a kind of determining method and device of touch point coordinate of contact panel, and relate to a kind of determining method and the device with the touch point coordinate of the contact panel of anisotropic material film especially.
Background technology
Along with man-machine interface more easy with need fast, contact panel has become the bridge of man-machine communication of new generation now, replaces keyboard, mouse and be widely used on various electronic product in a large number, especially the product such as smart mobile phone, panel computer, e-book.But the indium needed for critical material one transparent conductive film in contact panel is rare metal, and price volalility rises and falls large, so novel conductive material becomes the problem of the concern of technological development.
Such as, so educational circles and industry are developed and utilized other handy material, anisotropic material, as CNT (carbon nanotube, CNT), as the basic material of contact panel.The advantage of CNT does not need the processing procedures such as etch patterning, can make by more easy processing procedure.Such as carbon nanotube thin film capacitance type touch-control panel.
And drive the above-mentioned contact panel with anisotropic material film to still have one of problem to be solved, be exactly the resolution problem of the coordinate identification of touch point.Specifically, the relation of the CNT orientation of carbon nanotube thin film and produce very large resistance anisotropy, the resolution causing the X-coordinate vertical with CNT orientation to recognize is very high, but the problem that the resolution recognized of the Y-coordinate parallel with CNT orientation is very low.
Summary of the invention
This exposure provides has the determining method of the touch point coordinate of the contact panel of anisotropic material film and the embodiment of device about a kind of.One embodiment of driving method carries out drive actions based on combining to the different conducting end of the conducting end group in multiple conducting end of contact panel the conducting end comprised simultaneously, can assist or reach calculating and the output of the detection of touch point or the coordinate of touch point, and its resolution can be increased.
According to a direction of the present invention, a kind of determining method of touch point coordinate is proposed, in order to determine a touch point coordinate of contact panel, this contact panel has an anisotropic material film, multiple first conducting end and multiple second conducting end, those first conducting end are arranged at the side of this anisotropic material film and this anisotropic material film opposite side is provided with those relative second conducting end of a little first conducting end therewith, define a touch area between these first conducting end and these the second conducting end, the method comprises the steps.Comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and relative and adjacent at least two the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, respectively drive actions is carried out to the conducting end comprised in these combinations simultaneously, wherein the conducting end comprised is combined in these combinations to charge simultaneously, then discharge simultaneously, and discharge time detect this and combine the signal intensity of conducting end comprised.Multiple numerical value corresponding to the signal intensity combined according to these, export the coordinate figure corresponded on this touch area.
According to other direction of the present invention, propose a kind of determination device of touch point coordinate of contact panel, comprising: a control module and a sensing cell.Control module, in order to control the drive actions that has the contact panel of anisotropic material film, comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and its at least two relative and adjacent the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, discharging after respectively the conducting end comprised in these combinations being charged simultaneously simultaneously.Sensing cell, when the conducting end comprised in this control module is to these combinations each is discharged, in order to detect the signal intensity of the conducting end comprised in this combination simultaneously.Wherein this control module is more in order to the multiple numerical value corresponding to the signal intensity that combines according to these, exports the coordinate figure on the touch area corresponding to this contact panel.
Accompanying drawing explanation
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates an embodiment schematic diagram conducting end of a contact panel with anisotropic material film being carried out to drive actions.
Fig. 2 A illustrates the schematic diagram of the motion track of two touch points under drive actions illustrated in Figure 1, and wherein the X-coordinate of two motion tracks is different and Y-coordinate change direction is identical.
Fig. 2 B illustrates under drive actions illustrated in Figure 1 the graph of a relation that a signal intensity of this conducting end detection gained changes with touch point Y-coordinate.
Fig. 2 C illustrates the actual motion track of a touch point and the discrepant situation of motion track tool calculating gained.
Fig. 3 A at least two conducting end illustrated in the embodiment of above-mentioned contact panel carry out the schematic diagram of drive actions.
Fig. 3 B illustrates the schematic diagram of the motion track of two touch points under the drive actions illustrated at Fig. 3 A, and wherein the X-coordinate of two motion tracks is different and Y-coordinate change direction is identical.
The graph of a relation that Fig. 3 C changes with touch point Y-coordinate a signal intensity of this two conducting end detection gained under illustrating the drive actions illustrated at Fig. 3 A.
Fig. 4 illustrates a kind of process flow diagram of embodiment of driving method of contact panel.
Fig. 5 A illustrates the schematic diagram one of at least two the first conducting end being combined into row cutting action.
Fig. 5 B illustrates the schematic diagram one of at least two the second conducting end being combined into row cutting action.
Fig. 5 C illustrates and is combined into the schematic diagram of row cutting action to one of at least two the first conducting end with of these relative at least two the second conducting end one.
Fig. 5 D illustrates the schematic diagram another of at least two the first conducting end being combined into row cutting action with another one of these relative at least two the second conducting end.
Fig. 5 E illustrates the schematic diagram one of at least two the first conducting end and at least two the second conducting end being combined into row cutting action.
Fig. 6 illustrates a kind of schematic diagram of another embodiment of driving method of contact panel.
Fig. 7 A-7C illustrates the schematic diagram of several embodiments of the signal intensity detecting this little conducting end.
Fig. 8 is a kind of calcspar of an implementation column of touch panel module.
Fig. 9 is the schematic diagram of the embodiment combination of conducting end being made to the drive singal of drive actions.
Figure 10 illustrates a kind of process flow diagram of embodiment of determining method of touch point coordinate of contact panel.
Figure 11 illustrates on a kind of touch area of contact panel, to get the schematic diagram that at least two adjacent the first conducting end and relative at least two the second conducting end are the unit of a detection.
When Figure 12 test touch point TP_ illustrated as Figure 11 makes constant speed movement from the adjacent edges of a conducting end along another conducting end that Y-axis is relative, the numerical value corresponding to detected signal intensity is so that other parameter values are to the variation relation figure of time.
Figure 13 illustrates the process flow diagram of another embodiment of the step S1020 in Figure 10, and it can in order to solve the problem of edge Y-coordinate value error.
Main element symbol description:
10,20: contact panel
80: touch panel module
100,200: anisotropic material film
190,290,600: touch area
700: capacitive digital converter
800: drive unit 810: control module
811: scanning element 813: processing unit
820: sensing cell
P1-1 to P1-N: the first conducting end
P2-1 to P2-N: the second conducting end
A, B, R: track
CP: the track calculating gained
TP1-TP4: touch point
SA, SB, SA ', SB ': curve
S410, S420: step
C: charging action D: discharging action
S: sensor operation
S1010, S1020, S1310, S1320, S1330, S1322, S1324, S1326: step
TP_T: test touch point
Z0, Z1 to ZP: subregion
VA1: the first numerical value VA2: second value
T: third value
The difference of the DV: the first numerical value VA1 and second value VA2
ABS (DV): the absolute value of DV
The relation of the numerical value that Y_AXIS:Y coordinate figure is corresponding with signal intensity
Embodiment
The driving of contact panel
The a kind of of this exposure is below provided to have the driving method of the contact panel of anisotropic material film and the embodiment of device.One embodiment of driving method based on carrying out drive actions to adjacent at least two conducting end simultaneously, relative at least two conducting end are carried out simultaneously to the mode that drive actions and above-mentioned conducting end all carry out drive actions simultaneously.So, it can assist or reach the calculating of the detection of touch point or the coordinate of touch point.Also the resolution improving the coordinate detecting touch point gained can be helped.
In order to embodiments of the invention and the relation of resolution of coordinate detecting touch point gained are described, at this, first problem that resolution doing the identification that drive actions produces for single conducting end has error is discussed.
Fig. 1 illustrates an embodiment schematic diagram conducting end of a contact panel with anisotropic material film being carried out to drive actions.Contact panel 10 comprises an anisotropic material film 100 and a base material (not illustrating in figure), and wherein anisotropic material film 100 is arranged on base material.Such as, CNT (CNT) film is directly pasted on the transparent substrate and makes.Such as this carbon nanotube film on silicon substrate, quartz base plate or other suitable substrates, forms nano-sized carbon tube layer by chemical vapour deposition technique (chemical vapor deposition, CVD) or other suitable methods.Then, side pull-out carbon nanotube film, the namely anisotropic material film 100 along a draw direction from nano-sized carbon tube layer.Because of in stretching processing procedure, long refining shape CNT is rough arranged in parallel along draw direction, makes carbon nanotube film have comparatively Low ESR at draw direction, between be about draw direction impedance in the impedance of stretched vertically direction 50 to 350 times.Also because the position measured is different, direction is different, between 1K Ω to 800K Ω, therefore anisotropic material film 100 has conduction anisotropy to the surface resistance of carbon nanotube film.Be more than for example, therefore carbon nanotube film is when utilizing other processing procedures to produce other characterisitic parameters, its embodiment is not as limit.
Due to the characteristic of anisotropic material film 100, contact panel 10 is upper because have larger resistance at a first direction (or being called X-direction), therefore be essentially non-conductive, and upper because have less resistance in a second direction (or being called Y-direction), therefore in fact there is electric conductivity.The X-direction of the side of anisotropic material film 100 has multiple first conducting end P1-1 to P1-N (hereinafter abbreviated as P1) of row, and there are at opposite side multiple second conducting end P2-1 to P2-N (hereinafter abbreviated as P2) of row, these second conducting end P2 have in anisotropic material film 100 with relative being arranged on of these the first conducting end P1 in the Y direction, that is such as the second conducting end P2-1 is relative with the first conducting end P1-1.The touch-control action defining at least one touch area 190 between first conducting end P1 and the second conducting end P2, with the input action allowing user make touch-control, such as, press, pull and so on.
A conducting end to contact panel 10 illustrated in Figure 1 carries out drive actions, such as, be to the first conducting end P1-K, discharge after first charging again, and remaining conducting end then can make it as ground connection, connect end current potential or a suspension joint.When the first conducting end P1-K is full of electricity, the electric current of the first conducting end mainly can flow to via anisotropy film 100 the second conducting end P2-K arranged corresponding thereto, but due to anisotropy film 100, also non-fully insulation is non-conductive in the X direction, therefore still has leakage current and flows to other adjacent first conducting end of the first conducting end P1-K and other second conducting end adjacent with the second conducting end P2-K.Representing the equipotential line of the electrostatic field formed that to charge to the first conducting end P1-K as shown by the solid lines of fig. 1, is separately current direction signal just like what represent shown in the dotted line with arrow.
Drive actions is further again, can when discharging, and carrying out detection action, such as, is the signal intensity utilizing capacitive digital converter (capacitance-to-digital converter) to detect the first conducting end P1-K, thus produces corresponding numerical value.As Fig. 2 A shows, create a touch point TP1, move along track A near the first conducting end P 1-K, namely X-coordinate is constant and move up near the second conducting end P2-K along the Y direction; The relation that the signal intensity that corresponding ground can detect changes with the Y-coordinate of touch point TP1 is as shown in the curve S A in Fig. 2 B.Another touch point TP2 produces between the first conducting end P1-K and P1-(K+1) again, moves along the track B parallel with track A, and the signal intensity of detection is represented by curve S B with the Y-coordinate variation relation of touch point TP2.Curve S A and the SB of comparison diagram 2B are known, and touch point distance the first conducting end P1-K is nearer, and signal intensity is stronger, and vice versa; But for the numerical value of same signal intensity, but can be different because of touch point X-coordinate, and produce different numerical value.As can be seen here, the signal intensity of the first conducting end P1-K is only utilized can to cause error to the change estimating the Y-coordinate of touch point.Such as shown in Fig. 2 C, when a touch point TP3 along the track R (solid line) of reality turn right advance time, according to the signal intensity detected as calculated after path CP but become curve as shown by dashed lines as fluctuation change.So the resolution making the coordinate of the touch point that drive actions draws for single conducting end has serious error.
And according to this exposure, carry out drive actions at least two adjacent conducting end, can effectively improve above-mentioned problem.Fig. 3 A is the schematic diagram at least two conducting end P1-3 in the embodiment of contact panel 10 and P1-4 being carried out to drive actions.In figure 3 a, by the equipotential line between two the first conducting end P1-3 and P1-4 charging simultaneously, comparatively that shown in Figure 1 is mild in the X direction.So on the touch area between the first conducting end P1-3, P1-4, the second conducting end P2-3 and P2-4, create equipotential line Y-direction having gradient.
As the test mode of Fig. 2 A, under Fig. 3 B is shown in the drive actions shown in Fig. 3 A, two touch point TP1, TP2 move along track A and B respectively.Fig. 3 C illustrates the relation that the signal intensity that detects gained to this two conducting end P1-3 and P1-4 under the drive actions shown in Fig. 3 A changes with the Y-coordinate of touch point, wherein the Y-coordinate of the first conducting end is assumed to be 0, and the Y-coordinate of the second conducting end is assumed to be a certain integer.In fig. 3 c, curve S A ' and SB ' corresponds to two touch point TP1 and TP2 respectively.When the Y-coordinate of touch point less (namely more near this two first conducting end), curve S A ' and SB ' can be considered overlapping; When touch point Y-coordinate comparatively large (namely more away from this two first conducting end), curve S A ' and SB ' is still variant, but compared to Fig. 2 B, this difference reduces.
So, if to the action that two second conducting end P2-3 and P2-4 first charge and discharge, and detect in discharging action, the then relation that changes with the Y-coordinate of two touch point TP1 and TP2 of conducting end P2-3 and the P2-4 signal intensity that detects gained, can be similar to the above case, namely more near two second conducting end P2-3 and P2-4 (namely touch point Y-coordinate is larger) then the change curve of signal intensity be tending towards overlapping, more leave this two conducting end (namely touch point Y-coordinate is less) then the change curve of signal intensity still have some differences.
It can thus be appreciated that, in order to try to achieve the Y-coordinate of more accurate touch point, the conducting end that can respectively organize at least two first and at least two the second conducting end respectively carries out drive actions simultaneously, thus tries to achieve the Y-coordinate of touch point with interpolation or other calculation modes according to the numerical value that the multiple signal intensities detected are right.Please refer to shown in Fig. 4, propose a kind of embodiment of driving method of contact panel, it can assist or reach the calculating of the detection of touch point or the coordinate of touch point.It is as follows that the method comprises step: as shown in step S410, provides a contact panel with anisotropic material film, contact panel as shown in Figure 1.As shown in step S420, at least two adjacent first conducting end of foundation contact panel and its at least two relative and adjacent the second conducting end comprise a combination of at least two conducting end and comprise multiple combinations of combining of whole conducting end, carry out drive actions respectively to the conducting end comprised in these combinations simultaneously.
Multiple combinations described in above-mentioned steps S420 such as comprise following combination.One combination of one combination of at least two the first conducting end as shown in Figure 5A and at least two the second conducting end as shown in Figure 5 B.One of these at least two the first conducting end as shown in Figure 5 C with one of these relative at least two the second conducting end one to combine and another the combination of another and these relative at least two the second conducting end of these at least two the first conducting end as shown in Figure 5 D.At least two the first conducting end as shown in fig. 5e and a combination of at least two the second conducting end.In certain embodiments, respectively the conducting end of combinations thereof can be driven according to different secondary ordered pairs simultaneously, such as, first carries out the drive actions of the combination as Fig. 5 E, more then inserting needle to other drive actions as Fig. 5 A-5D.
In addition, in one embodiment, step S420 such as comprises: discharge after charging to the conducting end comprised in these combinations respectively simultaneously simultaneously; This implementation column can utilize one drive circuit to be realized.
Again in another embodiment, in the step s 420, when the conducting end comprised in combining each these is discharged simultaneously, more detect the signal intensity of the conducting end comprised in this combination; The detection action of this implementation column can utilize a sensing circuit to be such as that electric capacity digital conversion circuit is realized.Such as two combinations shown in Fig. 5 A and Fig. 5 B, can detect that signal intensity is to assist the Y-coordinate of the touch point of trying to achieve in the touch area that these conducting end are formed.Such as two combinations shown in Fig. 5 C and Fig. 5 D, can detect that signal intensity is to assist the X-coordinate of the touch point of trying to achieve in the touch area that these conducting end are formed.Such as the combination shown in Fig. 5 E, the background value of the signal intensity in the touch area that these conducting end are formed can be detected, to assist the use of X and the Y-coordinate of trying to achieve at touch point.
Please refer to another embodiment of the driving method of a kind of contact panel illustrated in Figure 6.As shown in Figure 6, type of drive can comprise: first scan one by one first and second relative conducting end according to the mode as Fig. 5 C and 5D, utilizes size thus the touch area 600 finding out the X-coordinate place of a touch point TP4 that signal intensity detected.Type of drive utilizes the mode as Fig. 5 A, 5B and 5E to drive again then.
In addition, in certain embodiments, for the combination shown in such as Fig. 5 A or Fig. 5 B, when detecting the signal intensity of the conducting end comprised in this combination, can reach by different modes.Such as shown in Fig. 7 A, for the combination of these at least two the first conducting end, indivedual signal intensity detecting the conducting end comprised in this combination simultaneously.Such as shown in Fig. 7 A, two the first conducting end are carried out individually to the detection of signal intensity by use two capacitive digital converter simultaneously.Again such as shown in Fig. 7 B, for the combination of these at least two the first conducting end, detecting the signal intensity when conducting end comprised in this combination is coupled, such as, is by making two conducting end be coupled to a capacitive digital converter to carry out detection signal strength.Again such as shown in Fig. 7 C, for the combination (when such as having first conducting end of three or more) of these at least two the first conducting end, detecting step comprises: detect this combination at least both couple time signal intensity.In the practice of anticipating as seen in figure 7 c, there are many implementations, such as, in 3 the first conducting end, select two groups and detect these two groups other signal intensities simultaneously.Such as shown in Fig. 7 C, by making two capacitive digital converter to carry out detecting the signal intensity of these three the first conducting end.In the example of above-mentioned Fig. 7 A or Fig. 7 C, two numerical value wherein obtained by two capacitive digital converter 700 can be made such as addition process thus obtain corresponding numerical value in the process of postorder.
In addition, Fig. 8 is a kind of calcspar of an implementation column of touch panel module.In fig. 8, touch panel module 80 comprises a contact panel 10 and drive unit 800.All conducting end of contact panel 10 are all coupled to drive unit 800, such as, be through flexible circuit board or printed circuit board (PCB).Drive unit 800 comprises control module 810 and a sensing cell 820.Control module 810, in order to control the drive actions to contact panel 10, can realize each embodiment of type of drive described above.Sensing cell 820 coordinates the drive actions of control module 810, in time detects the signal intensity of conducting end, to produce corresponding numerical value.In some implementations, drive unit 800, according to the output numerical value of sensing cell 820, can produce the coordinate of the touch point that touch area 190 senses according to this, or the parameter that other touch-controls are relevant.
Control module 810 can realize by different modes, such as, comprise one scan unit 811 and a processing unit 813.In one embodiment, control module 810 carries out drive actions, the action of simultaneously discharging after charging while carrying out combining one of conducting end to contact panel 10.
Again such as processing unit 813 such as according to above-mentioned Fig. 5 A-5E several combination or further according to embodiment as shown in Figure 6, gated sweep unit 811 makes scanning element 811 carry out discharging after driving is charged to the conducting end of combinations thereof respectively simultaneously simultaneously.Again such as example, Figure 9 shows that the combination of control module 810 or scanning element 811 pairs of conducting end, such as above-mentioned as Fig. 5 A to 5E the combination of illustrating, make an embodiment of the drive singal of drive actions.Drive singal system exports each conducting end so far combined, wherein represent during high levels and charging action (being representative in fig .9 with C) is carried out to the conducting end of a combination, represent during low level and discharging action (being representative in fig .9 with D) is carried out to the conducting end of this combination.When the conducting end comprised in combining each these is discharged simultaneously, sensing cell 820 carries out detection action (being representative in fig .9 with S) to the conducting end comprised in this combination, to detect signal intensity and to be converted to numerical value according to this.Sensing cell 820 such as comprises one or more capacitive digital converter 700, such as, carry out with Fig. 7 A, 7B or 7C or similar manner the signal intensity detecting conducting end.
In addition, when one of drive unit 800 pairs of conducting end are combined into row cutting action, remaining conducting end then can make it as ground connection, connect end current potential or a suspension joint.
In one embodiment, the numerical value that control module 810 or processing unit 813 can export according to sensing cell 820 again further calculates, to export the coordinate of touch point.
In addition, drive unit 800 or control module 810 or processing unit 813 can with integrated circuit as microcontroller, microprocessor, digital signal processor, Application Specific Integrated Circuit (ASIC, Application SpecificIntegrated Circuit) or element can programmed logic gate array (FPGA, Field Programmable GateArray) or logical circuit implement.Except exporting as except the drive singal of Fig. 9, in other embodiments, as long as the other forms of drive singal reaching above-mentioned drive actions all can according to this as realizing drive unit 800.
The decision of touch point coordinate
Moreover, more disclose the embodiment of the determination device of a kind of determining method of touch point coordinate and a kind of touch point coordinate of contact panel below.
For convenience of explanation, as shown in figure 11, explain for a touch area 290 with the contact panel 20 of anisotropic material film, wherein contact panel 20 and aforesaid contact panel 10 are all based on similar structure, so repeat no more its structure.Be the unit of a detection with adjacent at least two the first conducting end and relative and adjacent at least two the second conducting end in touch area 290, be such as two the first conducting end P1-1 and P1-2 and relative and adjacent two the second conducting end P2-1 and P2-2, and define a subregion Z0.So analogize and can define subregion Z0 to ZP on touch area 290, wherein P is the positive integer being less than N, P > 0.
As long as and will determine that the X-coordinate of touch point is at least carried out detection signal strength to a conducting end of the side on a direction and just can be learnt in theory.Comparatively speaking, the acquisition mode of the X-coordinate of the present embodiment is not limited with above-mentioned discussion.But the situation as shown in Fig. 2 B and 2C, then the error of the identification of known Y-coordinate is very large.So, according to shown in Fig. 3 A to 3C and the principle of the Y-coordinate value of above-mentioned discussion and the signal intensity corresponding relation of detection, the determining method of the touch point coordinate of the present embodiment can export the X and Y-coordinate value that correspond to a touch point on touch area 290, to improve the accuracy of overall coordinate figure.
Figure 10 is an a kind of embodiment of determining method of touch point coordinate, and the method is in order to determine that one has a touch point coordinate on a touch area of the contact panel of anisotropic material film.As shown in step S1010, comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and relative and adjacent at least two the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, respectively drive actions is carried out to the conducting end comprised in these combinations simultaneously, wherein the conducting end comprised is combined in these combinations to charge simultaneously, then discharge simultaneously, and discharge time detect this and combine the signal intensity of conducting end comprised.As shown in step S1020, the multiple numerical value corresponding to the signal intensity combined according to these, export the coordinate figure corresponded on this touch area.
In step S1010, detecting the mode that this combines the signal intensity of conducting end comprised, such as, is the signal intensity combined to detect this with such as Fig. 5 A to 5E and the various modes with reference to figure 7A to Fig. 7 C.In step S1020, the signal intensity of a combination corresponds to a numerical value.One combination of such as, two the first conducting end in Fig. 7 A utilizes two capacitive digital converter 700 to detect, so the numerical value corresponding to signal intensity of combination can be considered the output numerical value sum of two capacitive digital converter 700.A combination of two first conducting end of such as Fig. 7 B utilizes a capacitive digital converter 700 to detect again, so the numerical value corresponding to signal intensity of combination can be considered the output numerical value of capacitive digital converter 700.One combination of three the first conducting end again in such as Fig. 7 C utilizes two capacitive digital converter 700 to detect, so the numerical value corresponding to signal intensity of combination can be considered the output numerical value sum of two capacitive digital converter 700.
Based on embodiment and other embodiments above-mentioned of Figure 10, the deciding means of various touch point coordinate can be realized according to this.
Such as, the coordinate figure of a touch point TP5 a component as Y-coordinate be based on detection one first combine (such as two the first conducting end P1-1 and P1-2) gained signal intensity corresponding to one first numerical value VA1 and detect second combination (such as two the second conducting end P2-1 and P2-2) gained signal intensity corresponding to a second value VA2 difference and obtain.
Please refer to Figure 11, as a test touch point TP_T, when making constant speed movement from the outer rim of neighbouring another conducting end (such as P2-2) relative along Y-axis of the outer rim of a conducting end (such as P1-2), detect the numerical value (such as producing by capacitive digital converter) corresponding to signal intensity of the conducting end (such as P1-2) near section start as the first numerical value VA1, wherein because test touch point TP_T constant speed movement, the transverse axis of Figure 11 also can be considered actual displacement amount, namely actual Y-coordinate value.As shown in figure 12, the first numerical value VA1 changes to can be considered in fact it is little from becoming greatly in time.Otherwise the numerical value corresponding to signal intensity of the conducting end (such as P2-2) near endpoint detection place is as second value VA2.As shown in figure 12, second value VA2 in time variation relation as shown in figure 12, can be considered in fact be from little become large.And the difference DV of the first numerical value VA1 and second value VA2 presents similar in fact linear relation, wherein represent with the absolute value ABS (DV) of DV in fig. 12.When testing touch point TP_T and arriving two relative conducting end middle, ABS (DV) is 0.It can thus be appreciated that touch point Y-coordinate value comparatively accurately can be obtained based on the difference DV of the first numerical value VA1 and second value VA2.If DV represents VA1-VA2, the variation range of Y-coordinate value, from the first conducting end P1-2 to the second conducting end P2-2, is be about+270 to-260.Otherwise if DV represents VA2-VA1, the variation range of Y-coordinate value is then be about-270 to+260.In addition, in fig. 12, dotted line E1 and E2 represents two edges of touch area respectively, and the numerical value beyond excess edge all presents nonlinear change, and the Y-coordinate of submarginal touch point so will be caused to produce the situation of error or erroneous judgement.About the problem of this marginal error, after a while will separately for embodiment discussion.And following mentioning produces the X of touch point and multiple embodiments of Y-coordinate value, wherein all suppose that touch point be position is between two edges, the numerical value namely corresponding to signal intensity and the relation of coordinate figure are described by the region in Figure 11 between dotted line E1 and E2.
In certain embodiments, normalized idea can be utilized to produce Y-coordinate value.In one embodiment, these combinations in step S1010 more comprise: one the 3rd combination of these at least two the first conducting end and these at least two the second conducting end.In other words, the 3rd combination is exactly the whole conducting end including the first combination and the second combination, such as, shown in Fig. 5 E.In step S1010, the conducting end of the 3rd combination can be charged simultaneously, then discharges simultaneously, and discharge time detect this and combine the signal intensity of conducting end comprised.And the third value corresponding to signal intensity that the 3rd combines the conducting end comprised, be below denoted as T.The value of T is fixing in theory, but in fact because the reason of the resistance of contact panel center section, the value of T as shown in figure 11, more slightly declines in pars intermedia branch.So, based on the difference DV of the first numerical value VA1 and second value VA2, and third value T, can Y-coordinate value be produced.Such as, the mode of three kinds of definition Y-coordinate value can be made:
Formula 1:Y=(VA1-VA2)/T;
Formula 2:Y=(VA2-VA1)/T; Or
Formula 3:Y=(T-(VA1-VA2))/T, it is equivalent to Y=1-(VA1-VA2)/T.
So, can respectively the scope definition of Y-coordinate value in different range, be such as about in fact 1 to-1 ,-1 to 1 or 0 to 2 respectively.
In certain embodiments, above-mentioned normalized idea more can be utilized to produce Y-coordinate value, and draw the scope of the Y-coordinate value for design based on the resolution of Y-axis.The resolution such as defining Y-axis is Y_res (such as equals 480 or 600 or other numerical value), then above-mentioned formula can be utilized as follows to define Y-coordinate value in formula 3:
Formula 4:Y=(T-(VA 1-VA2))/T*Y_res/2.
So, the scope of Y-coordinate value can be defined in fact between 0 to Y_res.
Further, in order to compensate the T value of anticipating as shown in Figure 12 and imperfect in be the situation of a fixed value, more can the value of definition of T again.Such as in one embodiment, these combinations in step S1010 more comprise except comprising first, second, third above-mentioned combination: one of these at least two first conducting end combine with one the 4th of one of these relative at least two the second conducting end; And another of these at least two the first conducting end combines with another 1 the 5th of these relative at least two the second conducting end.Such as, the 4th combination and the 5th combination can be Fig. 5 C and two combinations shown in Fig. 5 D respectively.In one embodiment, in step S1010, the conducting end of the 4th combination (or the 5th combination) can be charged simultaneously, then discharges simultaneously, and discharge time detect the signal intensity that this combines the conducting end comprised.And the signal intensity of the 4th and the 5th combination corresponds to one the 4th numerical value VA4 and the 5th numerical value VA5 respectively.In an implementation column, utilize formula 4 definition of T '=(T+VA4+VA5) replace T, then and Y-coordinate value is defined as follows:
Formula 5:Y=(T '-(VA1-VA2))/T ' * Y_res/2.
So, the scope of Y-coordinate value can be defined in fact between 0 to Y_res.
And for the X-coordinate of touch point, as previously mentioned, the acquisition mode of the X-coordinate of the present embodiment is not limited in the mode of above-mentioned discussion, such as can with the mode of the pair of conductive end of scanning X axis as described in Figure 6 in the hope of, the reverse direction that can alternately come and go again scans X-axis and tries to achieve, and can try to achieve again by the scan mode of single side.Below more propose some embodiments, try to achieve the X-coordinate of touch point.Such as shown in Figure 11, as a touch point TP5 learns that it drops on subregion Z0 after scanning, one the 4th combination is such as two conducting end P1-1 and P2-1; One the 5th combination is such as two conducting end P1-2 and P2-2.In certain embodiments, the X-coordinate of touch point may be defined as the difference based on corresponding 1 the 4th numerical value VA4 and the 5th numerical value VA5 and tries to achieve.Such as, the two kinds of account forms utilizing above-mentioned formula can define X-coordinate value as formula 3 are as follows:
Formula 6:X=(T-(VA4-VA5))/T; Or
Formula 7:X=(T-(VA4-VA5))/T*X_ZONE_res/2, wherein X_ZONE_res is the resolution in subregion Z0 in X-axis.So, in subregion Z0, the scope of X-coordinate value can be defined in fact between 0 to X_ZONE_res.Again the X_ZONE_res resolution X--_res (such as 1024,800 or other numerical value) that can be defined as whole touch area 290 divided by the number num_total_zone of subregion as the P+1 of Figure 11.Other subregion, can be calculated according to above-mentioned formula.
In order to compensate the error of the T value of anticipating as shown in Figure 12, in an implementation column, utilize formula 5 definition of T "=(T+VA1+VA2) replace T, then and X-coordinate value is defined as follows:
Formula 8:X=(T "-(VA4-VA5))/T " * X_ZONE_res/2,
In addition, in an implementation column, based on an embodiment of the determining method of the touch point coordinate of above-mentioned Figure 10, the such as mode shown in above-mentioned Fig. 5 C or 5D or Fig. 6 of utilization, the conducting end of one group relative to both sides carries out the scanning of X-axis, according to the signal intensity detected size thus try to achieve the X-coordinate value of a touch point, thus the conducting end connecing touch point recently can be looked for, 4 conducting end corresponding to the sub-touch area 600 of Fig. 6.And two numerical value corresponding to signal intensity obtained when scanning this two pairs of conducting end, also can through being added with the use being defined as the T in above-mentioned formula.So, the number of these combinations in step S1010 can reduce.In addition, the first numerical value of the first combination and the second combination and the addition of second value can also be defined as the use of the T in above-mentioned public affairs.
Following examples are about the problem of preceding edge error, and as in Figure 12, dotted line E1 and E2 represents two edges of touch area respectively, the numerical value of DV and VA1 before dotted line E1, and after dotted line E2 and the numerical value of VA2 all present nonlinear change.According to the numerical value change of VA1 and VA2 and the relation with T value in Figure 12, in one embodiment, step 1020 comprises: as shown in the step S1310 of Figure 13, judge whether detection one third value T is less than the absolute value of the difference of the first numerical value VA1 and second value VA2, i.e. ABS (VA1-VA2).If so, the first numerical value VA1 and second value VA2 is compared to determine Y-coordinate value, as shown in step S1320.If not, then as shown in step S1330, export Y-coordinate value according to a formula, any one of wherein this formula such as above-mentioned formula 1 to 5, but the present embodiment is not as limit.
As for the way of example of step S1320, such as step S1322, if when the first numerical value VA1 is greater than second value VA2, the Y-coordinate value exporting this coordinate is the coordinate figure of the position identical in Y direction with the first conducting end P1, as shown in step S1324, Y=Y_P1.Please refer to Figure 11, if the Y-coordinate value Y_P2 of the first conducting end P1 is defined as 0, then in step S1324, Y=0.If when the first numerical value VA1 is less than second value VA2, export the coordinate figure that Y-coordinate value is the position identical in Y direction with the second conducting end P2, as shown in step S 1326, Y=Y_P2.Please refer to Figure 11, if the Y-coordinate value Y_P2 of the second conducting end P2 is defined as maximal value Y_MAX, then in step S1326, Y=Y_MAX.
The judged result end of the embodiment of step S1320 sees the definition of the coordinate at edge and different from the above, such as in one embodiment, can define Y_P1=Y_MAX and Y_P2=0.In any case, no matter in any case embodiment according to Figure 13 can allow Y-coordinate value, linear preferably Y-coordinate value can be obtained, such as line segment Y_AXIS shown in dotted lines in Figure 12, be presented between edge E1 and E2 is substantial linear relationship, and time outside excess edge E1 or E2, Y-coordinate value is fixing.
In addition, above-mentioned each embodiment about the determining method of touch point coordinate that has more can be implemented based on the drive unit 800 in an implementation column of earlier figures 8.In one embodiment, drive unit 800 can according to each embodiment of the determining method of the touch point coordinate based on Figure 10 to realize a kind of determination device of touch point coordinate of contact panel.Control module 810 more in order to according to the multiple numerical value corresponding to the signal intensity as these combinations in step S1010, can realize step S1020, exports a coordinate figure of the touch point on the touch area corresponding to contact panel.In another embodiment, drive unit 800 more can comprise scanning element 811 and processing unit 813.The numerical value that control module 810 or processing unit 813 can export according to sensing cell 820 again further calculates, to export the coordinate of touch point, wherein calculate according to coordinate computing formula described above.In another embodiment, control module 810 or processing unit 813 can make again the judgement of Y-coordinate value further according to the touch point as an embodiment edge of Figure 13.
In other embodiments, first conducting end of three or more and the second relative conducting end also can be used as the unit of a detection, and define corresponding subregion, and relevant coordinate figure formula also can be expanded according to formula described above, therefore have and be not limited with above-described embodiment about the determining method of touch point coordinate and device.
As mentioned above, the driving method of the contact panel with anisotropic material film and some embodiments of device and touch panel module have been proposed.In certain embodiments, because the conducting end respectively organized at least two first and at least two the second conducting end respectively carries out drive actions simultaneously, the equipotential line comparatively uniformly with gradient can be produced, so the resolution of the coordinate figure of touch point can be increased in X-direction and Y-direction.Again owing to driving the conducting end of multiple combination in driving process, therefore some embodiments can be assisted or reach: the calculating of the detection of touch point or the coordinate of touch point and output, and can increase its resolution.As shown in the embodiment of the determining method of more above-mentioned touch point coordinates, the coordinate figure of output can be achieved according to resolution to be presented, and output presents in fact the linearity preferably coordinate figure.
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when being as the criterion of defining with claims.
Claims (23)
1. the determining method of a touch point coordinate, in order to determine the touch point coordinate on a contact panel, this contact panel has an anisotropic material film, multiple first conducting end and multiple second conducting end, described first conducting end is arranged at the side of this anisotropic material film and this anisotropic material film opposite side is provided with described second conducting end relative with described first conducting end, define a touch area between described first conducting end and described second conducting end, the method comprises:
Comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and relative and adjacent at least two the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, respectively drive actions is carried out to the conducting end comprised in described combination simultaneously, wherein the conducting end comprised is combined for one in described combination to charge simultaneously, then discharge simultaneously, and discharge time detect the signal intensity of the conducting end that this combination comprises; And
According to described combination signal intensity corresponding to multiple numerical value, export the coordinate figure corresponded on this touch area,
Wherein a component of this coordinate figure be based on one first numerical value corresponding to the signal intensity detecting this first combination gained and detect this second combination gained signal intensity corresponding to a second value difference and obtain, along the position in the vertical second direction of a first direction of described first conducting end of these row maybe described second conducting end of these row in this touch area of this representation in components.
2. the determining method of touch point coordinate as claimed in claim 1, it is characterized in that, described combination more comprises: one the 3rd combination of these at least two the first conducting end and these at least two the second conducting end.
3. the determining method of touch point coordinate as claimed in claim 2, is characterized in that, this component of this coordinate figure obtains based on the difference of this first numerical value and this second value and the third value that detects corresponding to the 3rd signal intensity combining gained.
4. the determining method of touch point coordinate as claimed in claim 3, it is characterized in that, described combination more comprises:
One of these two first conducting end in two adjacent first conducting end of this contact panel and relative and adjacent two the second conducting end combine with one the 4th of one of these relative two the second conducting end; And
Another of these two the first conducting end combines with another 1 the 5th of these relative two the second conducting end.
5. the determining method of touch point coordinate as claimed in claim 4, it is characterized in that, this component of this coordinate figure is based on the difference of this first numerical value and this second value, this third value, detects one the 4th numerical value corresponding to the 4th signal intensity combining gained and one the 5th numerical value that detects corresponding to the 5th signal intensity combining gained and obtaining.
6. the determining method of the touch point coordinate as described in claim 3 or 5, is characterized in that, this component of this coordinate figure especially based on this second direction of this touch area a resolution numerical value and obtain.
7. the determining method of touch point coordinate as claimed in claim 4, it is characterized in that, another component of this coordinate figure be based on this third value, detect the 4th combination gained signal intensity corresponding to one the 4th numerical value and detect the 5th combination gained signal intensity corresponding to one the 5th numerical value and obtain, the position in this this touch area of another representation in components on this first direction.
8. the determining method of touch point coordinate as claimed in claim 7, is characterized in that, this another component of this coordinate figure obtains based on the difference of the 4th numerical value and the 5th numerical value and this third value.
9. the determining method of touch point coordinate as claimed in claim 7, is characterized in that, this another component of this coordinate figure obtains based on the difference of the 4th numerical value and the 5th numerical value, this first numerical value, this second value and this third value.
10. the determining method of the touch point coordinate as described in any one of claim 7 to 9, is characterized in that, this another component of this coordinate figure especially based on this first direction of this touch area a resolution numerical value and obtain.
The determining method of 11. touch point coordinates as claimed in claim 2, is characterized in that, this step exporting this coordinate figure corresponded on this touch area comprises:
Whether the third value corresponding to signal intensity judging to detect the 3rd combination gained is less than the absolute value of the difference of this first numerical value and this second value;
If this third value is less than the absolute value of the difference of this first numerical value and this second value, compare this first numerical value and this second value to determine the value of this component of this coordinate.
The determining method of 12. touch point coordinates as claimed in claim 11, is characterized in that, compares this first numerical value and this second value to determine that this step of the value of this component of this coordinate comprises:
If when this first numerical value is greater than this second value, this component exporting this coordinate is the value of the component of the position identical in this second direction with described first conducting end; And
If when this first numerical value is less than this second value, this component exporting this coordinate is the value of the component of the position identical in this second direction with described second conducting end.
The determination device of the touch point coordinate of 13. 1 kinds of contact panels, comprising:
One control module, in order to control the drive actions that has the contact panel of anisotropic material film, comprise one first combination of these at least two the first conducting end according at least two adjacent first conducting end of this contact panel and its at least two relative and adjacent the second conducting end and comprise multiple combinations of one second combination of these at least two the second conducting end, discharging after respectively the conducting end comprised in described combination being charged simultaneously simultaneously; And
One sensing cell, when the conducting end comprised in this control module is to each described combination is discharged, in order to detect the signal intensity of the conducting end comprised in this combination simultaneously;
Wherein this control module is more in order to the multiple numerical value corresponding to the signal intensity according to described combination, exports the coordinate figure on the touch area corresponding to this contact panel,
Wherein a component of this coordinate figure be based on one first numerical value corresponding to the signal intensity detecting this first combination gained and detect this second combination gained signal intensity corresponding to a second value difference and obtain, along the position in the vertical second direction of a first direction of described first conducting end of these row maybe described second conducting end of these row in this touch area of this representation in components.
The determination device of 14. touch point coordinates as claimed in claim 13, it is characterized in that, described combination more comprises: one the 3rd combination of these at least two the first conducting end and these at least two the second conducting end.
The determination device of 15. touch point coordinates as claimed in claim 14, is characterized in that, this component of this coordinate figure obtains based on the difference of this first numerical value and this second value and the third value that detects corresponding to the 3rd signal intensity combining gained.
The determination device of 16. touch point coordinates as claimed in claim 15, it is characterized in that, described combination more comprises:
One of these two first conducting end in two adjacent first conducting end of this contact panel and relative and adjacent two the second conducting end combine with one the 4th of one of these relative two the second conducting end; And
Another of these two the first conducting end combines with another 1 the 5th of these relative two the second conducting end.
The determination device of 17. touch point coordinates as claimed in claim 16, it is characterized in that, this component of this coordinate figure is based on the difference of this first numerical value and this second value, this third value, detects one the 4th numerical value corresponding to the 4th signal intensity combining gained and one the 5th numerical value that detects corresponding to the 5th signal intensity combining gained and obtaining.
The determination device of 18. touch point coordinates as claimed in claim 16, it is characterized in that, another component of this coordinate figure be based on this third value, detect the 4th combination gained signal intensity corresponding to one the 4th numerical value and detect the 5th combination gained signal intensity corresponding to one the 5th numerical value and obtain, the position in this this touch area of another representation in components on this first direction.
The determination device of 19. touch point coordinates as claimed in claim 18, is characterized in that, this another component of this coordinate figure obtains based on the difference of the 4th numerical value and the 5th numerical value and this third value.
The determination device of 20. touch point coordinates as claimed in claim 18, is characterized in that, this another component of this coordinate figure obtains based on the difference of the 4th numerical value and the 5th numerical value, this first numerical value, this second value and this third value.
The determination device of 21. touch point coordinates as claimed in claim 15, it is characterized in that, if this third value is less than the absolute value of the difference of this first numerical value and this second value, and this first numerical value is when being greater than this second value, this component that this control module exports this coordinate is the value of the component of the position identical in this second direction with described first conducting end.
The determination device of 22. touch point coordinates as claimed in claim 15, it is characterized in that, if this third value is less than the absolute value of the difference of this first numerical value and this second value, and this first numerical value is when being less than this second value, this component that this control module exports this coordinate is the value of the component of the position identical in this second direction with described second conducting end.
The determination device of 23. touch point coordinates as claimed in claim 13, it is characterized in that, this control module comprises:
One scan unit, in order to control the drive actions of this contact panel, discharges after charging respectively to the conducting end comprised in described combination simultaneously simultaneously; And
One processing unit, in order to described numerical value corresponding to the signal intensity according to described combination, exports this coordinate figure on this touch area corresponding to this contact panel.
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