CN101539828B - Device and method for judging multi-contact positions on projective capacitive touch panel - Google Patents
Device and method for judging multi-contact positions on projective capacitive touch panel Download PDFInfo
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- CN101539828B CN101539828B CN2008100845271A CN200810084527A CN101539828B CN 101539828 B CN101539828 B CN 101539828B CN 2008100845271 A CN2008100845271 A CN 2008100845271A CN 200810084527 A CN200810084527 A CN 200810084527A CN 101539828 B CN101539828 B CN 101539828B
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Abstract
The invention discloses a device and a method for judging multi-contact positions on a projective capacitive touch panel. When a heavy current is detected on an X sensing strip, whether only one contact or more contacts exist on the X sensing strip according the intensity of the current on the X sensing strip is judged, and Y coordinates of the more contacts on the X sensing strip are recorded. And then, all current on a Y sensing strip is sensed, and X coordinates of the more contacts on the X sensing strip can be judged by referring to x and y information of X and/or Y coordinates of each contact which have been calculated firstly and directly.
Description
Technical field
The present invention is meant a kind of device and method of judging multi-contact positions on projective capacitive touch panel especially about the apparatus and method of multi-contact positions on a kind of contact panel.
Background technology
Traditionally, the input of electronic installation is carried out with keyboard and mouse, and can not carry out in the mode of human intuition.Afterwards, contact panel has been widely used in all kinds of big compact electronic devices, this moment, the user was able to by the mode of its top panels of object striking such as hand or pointer this electronic installation be carried out the contact input, the position of set this contact of sensing device senses, contact panel below this moment is to realize the purpose of this touch-control electronic device of operation.Sensing mechanism with the input of sensing contact is divided, and contact panel can be categorized as contact panels such as resistance-type, condenser type, acoustic wave, optical profile type and electromagnetic type; Kind with contact panel is divided, and it comprises classifications such as contact panel and Trackpad again.
Now, more having multiconductor acts on the contact panel it is carried out the technology of function input, to make the more convenient electronic installation that makes the apparatus contact panel of user's energy, so the decision technology of multi-contact positions also must correspondingly be suggested.
With capacitance type touch-control panel, the variables manner that changes of the equivalent capacitance value that its sensing apparatus is located by the sensing contact when the sensing contact position is carried out, its will be illustrated as after, wherein capacitance type touch-control panel serves as the input media with user's finger often, and generally can not use pointer, because finger can change the equivalent capacitance value at contact position place for conductive media.
Figure 1A is the three-dimensional exploded view of a traditional projective capacitive touch panel.Shown in Figure 1A, this capacitance type touch-control panel 10 by a transparency carrier 11, the transparent sensed layer 12 of an X, a transparent dielectric layer 13 and the transparent sensed layer 14 of a Y from lower to upper similar shape form, the transparent sensed layer 12 of X and Y wherein, the existence of one sensing patterns 15 is respectively arranged on 14, judge on the panel 10 one or multifinger existence in order to cooperate with other elements, wherein sensing patterns 15 is joined with many external wires 19, below explanation will be arranged.
Figure 1B and Fig. 1 C are respectively the X and the transparent sensed layer 12 of Y of projective capacitive touch panel shown in Figure 1A, the synoptic diagram of the sensing patterns 15 on 14, Fig. 1 D then overlooks the explanation synoptic diagram for the sensing patterns 15 of capacitance type touch-control panel 10 shown in Figure 1B and Fig. 1 C through covering folded X and the transparent sensed layer 12,14 of Y.
Shown in Figure 1B, Fig. 1 C and Fig. 1 D, this sensing patterns 15 comprises many X sensing bars 151 and many Y sensing bars 152, and each bar of above-mentioned X sensing bar 151 all is made up of many X conductor wire footpaths 16 and a plurality of sensory panel 18, and each bar of above-mentioned Y sensing bar 152 all is made up of many Y conductor wire footpaths 17 and a plurality of sensory panel 18, wherein above-mentioned sensory panel 18 periodically is connected between above-mentioned adjacent X and the Y conductor wire footpath 16,17 respectively.This sensing patterns 15 is located under the glass plate (not shown) of contact panel 10, and with the common sensing apparatus 20 that constitute these panels 10 of these many external wires 19 and a sensing voltage source 21, and this external wire 19 is located at respectively between this sensing voltage source 21 and corresponding X and the Y conductor wire footpath 16,17.
When real work, sensing voltage source 21 is provided with one to each X conductor wire footpath 16 in regular turn and exchanges sensing voltage Vs, and then in regular turn each Y conductor wire footpath 17 is provided with this sensing voltage Vs, the striking position P of sensing user on this face glass in this way, below explanation will be arranged, wherein this glass plate for the user points real striking part.
The existence of one capacity effect is arranged between X and Y sensing bar 151,152 and this face glass, and an and existence that another capacity effect also arranged between the (not shown) virtually.When the user pointed 1 P that contacts on this face glass, this contact point promptly brought a capacity effect in addition to X and Y conductor wire footpath 16,17, so an equivalent capacitance of this contact point P below is changed.Sensing should the equivalence capacitance the change amount time, this sensing voltage Vs produces a corresponding current I on each X and Y sensing bar 151,152.At this moment, utilize the change of this electric current I of current detecting unit (not shown) sensing, declare and know the position of P on this face glass, this contact, because of the change of this electric current I change corresponding to this equivalence capacitance.
When the multiconductor input was arranged, this kind projective capacitive touch panel can't be judged this multifinger each place, position fully, after this will cooperate Fig. 2 to be illustrated in.Structural representation when Fig. 2 exists for having multiconductor on explanation one traditional projective capacitive touch panel, its structure is with identical shown in Figure 1A, Figure 1B and Fig. 1 C.As shown in Figure 2, (x1, y1) (x2 y2) constitutes one first contact sets to a contact P1, and (x1, y2) (x2 y1) constitutes one second contact sets to a contact P3 with a contact P4 with a contact P2.When sensing voltage Vs delivers to X and Y conductor wire footpath 16 respectively and alternately, 17 o'clock, 4-coordinate value x1, x2, y1, y2 is obtained, at this moment (x1, x2, y1, y2) four X or Y coordinate figure can be formed four position coordinateses, and (x y), can't be differentiated so two contacts that the user imports on this projective capacitive touch panel 10 are first group or second group actually.
In view of the foregoing, a kind ofly judge that the device and method of multi-contact positions on projective capacitive touch panel truly has the necessity that is suggested, to realize its application in multiconductor control.
Summary of the invention
In view of the existing problem of above-mentioned known technology, a purpose of the present invention promptly is to propose a kind of device of judging multi-contact positions on projective capacitive touch panel, to overcome the shortcoming of known technology.
Another object of the present invention is to propose a kind of method of judging multi-contact positions on projective capacitive touch panel, to overcome the shortcoming of known technology.
In the device of judgement one multi-contact positions on projective capacitive touch panel of the present invention, this projective capacitive touch panel comprises the transparency carrier that similar shape forms and up piles up in regular turn, the transparent sensed layer of one Y, one transparent dielectric layer and the transparent sensed layer of an X, the transparent sensed layer of this X has many X sensing bars of arranging along a directions X, and on this directions X, have one the one X side and one the 2nd an X side, the transparent sensed layer of this Y has many Y sensing bars of arranging along a Y direction, and on this Y direction, have one the one Y side and one the 2nd a Y side, this multiconductor makes the transparent sensed layer of this X contact on this multi-contact positions with the transparent sensed layer of this Y, and this sensing apparatus comprises many X external wires and many Y external wires, one sensing source, one current sensing unit, one electric current comparing unit, one number of contacts identifying unit, one first coordinate identifying unit, one second a coordinate identifying unit and a position coordinates identifying unit.These many X external wires and many Y external wires are by respectively in order to electrically connect these many X and Y sensing bar in along this first and second X side and this first and second Y side place with one-one relationship.This sensing source is used to provide one to exchange many X sensing bars of sensing voltage to an X side and the 2nd X side by these many X external wires in regular turn, and then provide this interchange sensing voltage to many Y sensing bars of a Y side and the 2nd Y side by these many Y external wires in regular turn, when this multiconductor occurs, at least one group of corresponding X sensing bar of these many X and Y sensing bar, respectively to form at least one X electric current to group, and at least one group of corresponding Y sensing bar, respectively form at least one Y electric current to group, wherein all to comprise at least one X electric current right to each of group for this at least one corresponding X electric current, and right each of this at least one X electric current all has one first and one the 2nd X part electric current, and this first and second X part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding X sensing bar, and when this multifinger at least one be during on this correspondence X sensing bar more than a contact, the one X part electric current is formed on an X side and should be bordering between the X side person more than one of a contact, the 2nd X part electric current is formed on the 2nd X side and should be bordering between the 2nd X side person more than one of a contact, and it is right that this at least one corresponding Y electric current comprises at least one Y electric current at least one that organize, and right each of this at least one Y electric current all has one first and one the 2nd Y part electric current, and this first and second Y part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding Y sensing bar, and when this multifinger at least one be during on this correspondence Y sensing bar more than a contact, the one Y part electric current is formed on a Y side and should be bordering between the Y side person more than one of a contact, and the 2nd Y part electric current is formed on the 2nd Y side and should be bordering between the 2nd Y side person more than one of a contact.This current sensing unit is used in regular turn respectively an X electric current and the Y electric current on each of this first and second X and this X of Y side sensing and Y sensing bar, to obtain this at least one group of X electric current respectively to reaching this at least one group of Y electric current to group, first and second X part electric current of each that judge respectively that this at least one X electric current is right, and first and second right Y part electric current of first and second Y electric current of right each of this at least one Y electric current, and judge maximum first and second Y part electric current in maximum first and second X part electric current of one in this first and second X part electric current and this first and second Y part electric current respectively, and should first and second X of maximum and the Y electric current be used as first and second X and Y electric current respectively.This electric current comparing unit is used to respectively relatively this first and second X electric current and first and second X reference current, and then relatively this first and second Y electric current and first and second Y reference current respectively, to obtain an electric current change amount of this first and second X and Y electric current respectively; This number of contacts identifying unit is used to respectively whether to judge the existence that whether has on the X sensing bar of this first and second X electric current correspondence more than a contact greater than one first critical value according to the electric current change amount of this first and second X electric current, and respectively according to the change amount of this first and second X electric current whether less than this first critical value but judge only tool one single-contact existence on the X sensing bar of this first and second X electric current correspondence greater than one second critical value, and whether judge the existence that whether has on the Y sensing bar of this first and second Y electric current correspondence more than a contact according to the change amount of this first and second Y electric current respectively greater than one first critical value, and respectively according to the change amount of this first and second Y electric current whether less than this first critical value but judge only tool one single-contact existence on the Y sensing bar of this first and second Y electric current correspondence greater than one second critical value; This first coordinate identifying unit is used to judge that this is judged as on this correspondence X sensing bar and has this y coordinate more than the position of a contact, and judges that this is judged as the x and the y coordinate of the single-contact position on this correspondence X sensing bar.This second coordinate identifying unit is used to judge that this is judged as single-contact X coordinate x and Y coordinate y on this correspondence Y sensing bar, and be determined to single-contact X and Y coordinate x on this correspondence X sensing bar according to this, y, Y coordinate y on this correspondence X sensing bar more than a contact, and judge this X and Y coordinate x on this corresponding X sensing bar more than each contact position of a contact at the single contact on this correspondence Y sensing bar and more than the x of a contact and y coordinate, y, and the Y coordinate y more than the contact position of a contact on this this correspondence X sensing bar of having judged confirmed again.This position coordinates identifying unit is used to match single contact on this correspondence X and the Y sensing bar and more than the x and the y coordinate of a contact, to determine this multifinger position.
In the method for judgement one multi-contact positions on projective capacitive touch panel of the present invention, this projective capacitive touch panel comprises the transparency carrier that similar shape forms and up piles up in regular turn, the transparent sensed layer of one Y, one transparent dielectric layer and the transparent sensed layer of an X, the transparent sensed layer of this X has many X sensing bars of arranging along a directions X, and on this directions X, have one the one X side and one the 2nd an X side, the transparent sensed layer of this Y has many Y sensing bars of arranging along a Y direction, and on this Y direction, have one the one Y side and one the 2nd a Y side, this multiconductor makes the transparent sensed layer of this X contact on this multi-contact positions with the transparent sensed layer of this Y, many X external wires and many Y external wires are by respectively in order to electrically connect these many X and Y sensing bar in along this first and second X side and this first and second Y side place with one-one relationship; Provide one to exchange many X sensing bars of sensing voltage by these many X external wires in regular turn to an X side and the 2nd X side, and then provide this interchange sensing voltage to many Y sensing bars of a Y side and the 2nd Y side by these many Y external wires in regular turn, when this multiconductor occurs, at least one group of corresponding X sensing bar of these many X and Y sensing bar, respectively to form at least one X electric current to group, and at least one group of corresponding Y sensing bar, respectively form at least one Y electric current to group, wherein all to comprise at least one X electric current right to each of group for this at least one corresponding X electric current, and right each of this at least one X electric current all has one first and one the 2nd X part electric current, and this first and second X part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding X sensing bar, and when this multifinger at least one be during on this correspondence X sensing bar more than a contact, the one X part electric current is formed on an X side and should be bordering between the X side person more than one of a contact, the 2nd X part electric current is formed on the 2nd X side and should be bordering between the 2nd X side person more than one of a contact, and it is right that this at least one corresponding Y electric current comprises at least one Y electric current at least one that organize, and right each of this at least one Y electric current all has one first and one the 2nd Y part electric current, and this first and second Y part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding Y sensing bar, and when this multifinger at least one be during on this correspondence Y sensing bar more than a contact, the one Y part electric current is formed on a Y side and should be bordering between the Y side person more than one of a contact, and the 2nd Y part electric current is formed on the 2nd Y side and should be bordering between the 2nd Y side person more than one of a contact; An X electric current and the Y electric current on each of this X of sensing and Y sensing bar respectively in regular turn, to obtain this at least one group of X electric current respectively to reaching this at least one group of Y electric current to group, first and second X part electric current of each that judge respectively that this at least one X electric current is right, and first and second right Y part electric current of first and second Y electric current of right each of this at least one Y electric current, and judge maximum first and second Y part electric current in maximum first and second X part electric current of one in this first and second X part electric current and this first and second Y part electric current respectively, and should first and second X of maximum and the Y electric current be used as first and second X and Y electric current respectively; Relatively this first and second X electric current and first and second X reference current respectively, and then relatively this first and second Y electric current and first and second Y reference current respectively are to obtain an electric current change amount of this first and second X and Y electric current respectively; Whether judge the existence that whether has on the X sensing bar of this first and second X electric current correspondence more than a contact according to the electric current change amount of this first and second X electric current respectively greater than one first critical value, and respectively according to the change amount of this first and second X electric current whether less than this first critical value but judge only tool one single-contact existence on the X sensing bar of this first and second X electric current correspondence greater than one second critical value, and whether judge the existence that whether has on the Y sensing bar of this first and second Y electric current correspondence more than a contact according to the change amount of this first and second Y electric current respectively greater than one first critical value, and respectively according to the change amount of this first and second Y electric current whether less than this first critical value but judge only tool one single-contact existence on the Y sensing bar of this first and second Y electric current correspondence greater than one second critical value; Judge that this is judged as on this correspondence X sensing bar and has this y coordinate more than the position of a contact, and judge that this is judged as the x and the Y coordinate of the single-contact position on this correspondence X sensing bar; Judge that this is judged as single-contact X coordinate x and Y coordinate y on this correspondence Y sensing bar, and be determined to single-contact X and Y coordinate x on this correspondence X sensing bar according to this, y, at the Y coordinate y on this correspondence X sensing bar more than a contact, and judge this X and Y coordinate x on this corresponding X sensing bar more than each contact position of a contact at the single contact on this correspondence Y sensing bar and more than the x of a contact and y coordinate, y, and the Y coordinate Y more than the contact position of a contact on this this correspondence X sensing bar of having judged confirmed again; And single contact and more than the x and the y coordinate of a contact, to determine this multifinger position on pairing this correspondence X and the Y sensing bar.
The application of the invention, multifinger position is determined on projective capacitive touch panel fully, and this kind contact panel can formally be used on the touch-control of multiconductor function.
Above-mentioned general introduction and follow-up detailed description and accompanying drawing all are for further specifying technical scheme, technological means and the effect of the present invention for realizing that goal of the invention is taked, and are not to be used for the present invention is limited.
Description of drawings
The explanation of preferred embodiment of the present invention by following accompanying drawing is, wherein:
Figure 1A is the three-dimensional exploded view of a traditional projective capacitive touch panel;
Figure 1B and Fig. 1 C are respectively the synoptic diagram of the sensing patterns on the projective capacitive touch panel shown in Figure 1A;
Fig. 1 D overlooks the explanation synoptic diagram for the sensing patterns of Figure 1B and Fig. 1 C what cover poststack; And
Plan structure synoptic diagram when Fig. 2 exists for having multiconductor on traditional projective capacitive touch panel shown in explanation one Figure 1A;
Fig. 3 is the three-dimensional exploded view of projective capacitive touch panel of the present invention;
Fig. 4 is the functional block diagram of projective capacitive touch panel of the present invention;
The synoptic diagram that Fig. 5 judges for the multi-contact positions of explanation projective capacitive touch panel of the present invention; And
Fig. 6 is the process flow diagram of the method for judgement multi-contact positions on projective capacitive touch panel of the present invention.
Wherein, Reference numeral:
10 projective capacitive touch panels, 11 X transparency carriers
Transparent sensed layer 13 transparent dielectric layers of 12 X
Transparent sensed layer 15 sensing patterns of 14 Y
17 Y conductor wires footpath, 16 X conductor wires footpath
18 sensory panels, 19 external wires
20 sensing apparatus, 21 sensing voltage sources
151 X sensing bars, 152 Y sensing bars
The transparent sensed layer of 31 substrates, 32 X
The transparent sensed layer of 33 transparent dielectric layers, 34 Y
35 sensing patterns, 36 X sensing bars
37 Y sensing bars, 40 position determination means
42 sensings source, 41 external wire unit
43 current sensing unit, 44 electric current comparing units
45 number of contacts identifying units, 46 first coordinate identifying units
47 second coordinate identifying units, 48 position coordinates identifying units
51 sensings, 59 external wires of originating
Embodiment
The present invention is a kind of device and method of judging multi-contact positions on projective capacitive touch panel, and it will cooperate appended accompanying drawing to be described in detail as follows by preferred embodiment.
See also Fig. 3, it is the three-dimensional exploded view of projective capacitive touch panel of the present invention.As shown in Figure 3, this projective capacitive touch panel 30 comprises the transparent sensed layer 32 of a transparency carrier 31, an X, a transparent dielectric layer 33 and the transparent sensed layer 34 of a Y that similar shape forms and up piles up in regular turn, it is identical with traditional projective capacitive touch panel, the existence of one sensing patterns 37 is wherein all arranged on transparent sensed layer 32 of this X and the Y sensed layer 34, and the connection of external wire 59 is arranged on this sensing patterns 37, below explanation will be arranged.
See also Fig. 4, it is the functional block diagram of the device of judgement multi-contact positions on projective capacitive touch panel of the present invention.
As shown in Figure 4, this device 40 comprises an external wire unit 41, sensing source 42, one current sensing unit 43, an electric current comparing unit 44, a number of contacts identifying unit 45, one first coordinate identifying unit 46, one second coordinate identifying unit 47 and a position coordinates identifying unit 48, after the explanation of its each self-applying will be provided in.
Fig. 5 overlooks schematic illustration for the device of judgement multi-contact positions on projective capacitive touch panel of the present invention when having multiconductor thereon.
As Fig. 4 and shown in Figure 5, many the Y sensing bars of arranging along the Y direction 36 on the transparent sensed layer 32 of the X that this device 50 comprises this projective capacitive touch panel 30 many X sensing bars of arranging along directions X 35 and the transparent sensed layer 34 of this Y, above-mentioned X sensing bar 35 is a sensing patterns 37 with Y sensing bar 36 nominals.Have two X side X1 and X2 on the directions X of this projective capacitive touch panel 30, and on its Y direction, have two Y side Y1, Y2, wherein above-mentioned X and Y sensing bar 35,36 with X and the Y sensing bar 151 shown in Figure 1B and Fig. 1 C, 152 is identical, and only with two several Xs and Y sensing bar 35,36 expressions relevant with embodiment of the invention explanation.As this multiconductor P1, P2 (is that example describes with 2) is when coming across on the panel 30, and transparent sensed layer 32 of this X and the transparent sensed layer 34 of this Y are at these a plurality of contact P1, and (not shown) contacts on the P2 position.
At first, many X and Y external wire unit 41 are provided earlier, and join with man-to-man relation and above-mentioned X sensing bar 35 and Y sensing bar 36 respectively.
Then, this sensing source 42 is earlier by 59 pairs two X sides of corresponding external wire X1, X sensing bar 35 on the X2 provides one to exchange sensing voltage Vs in regular turn, and then to two Y side Y1, the Y sensing bar 36 of Y2 provides this interchange sensing voltage Vs, and at X sensing bar 35 and above-mentioned contact P1, the relevant place of at least one of P2 forms an electric current I with earlier, then at Y sensing bar 36 and above-mentioned contact P1, the relevant place of at least one of P2 forms an electric current I again.
In fact, be stored in this X and Y sensing bar 35 as a contact P1 or P2,36 o'clock, this electric current I just is formed a first's electric current and a second portion electric current I, because of the contact can be with the electric current I conducting on X and the Y sensing bar 35,36 to ground, so first and second part electric current I is respectively from two X side X1, X2 and two Y side Y1, Y2 is circulated to ground toward this contact P1 or P2, and it is right at this this first and second part electric current I to be called an electric current.If above-mentioned contact P1, X and Y sensing bar 35 that at least one of P2 is relevant, contact P1 in 36 places, P2 number occur more than for the moment, and then its corresponding electric current I also is divided into first and second part electric current I herein, because of the judgement of multi-contact positions of the present invention only with contact P1, the electric current I that P2 and two X side X1, X2 and two Y side Y1, Y2 fold part is relevant, so two or multiconductor P1, the electric current on the path that P2 folds can be out in the cold no matter.
In fact, one single contact can form one group of X electric current to and one group of Y electric current right, because of pushing down not only an X and Y sensing bar 35,36 in single contact, so all are corresponding to the X on a single-contact X who is pushed down and the Y sensing bar 35,36 and the Y electric current promptly constitutes one group of X respectively and the Y electric current is right.When multiconductor existed, the right group number of X that is formed and Y electric current was promptly greater than one.In fact, point the X at center and the X on the Y sensing bar 35,36 and Y electric current the most close user and one maximum X and Y electric current I can be arranged respectively group.
In fact, contactless pressure X and Y sensing bar 35 thereon, 36 also non-currentless existence, because of each X and Y sensing bar 35,36 with respect to all having a capacity effect between other elements of contact panel 30 and external environment condition, so though two Y side Y1 are carried out identical sensing voltage Vs on the Y2, X and the Y sensing bar of being pushed down by the contact 35,36 still do not have the electric current existence.
Please get back to Fig. 4 and Fig. 5, then, this current sensing unit 43 respectively the above-mentioned X of sensings and Y electric current to group, and sense respectively these X and Y electric current to the maximum X electric current in each group of group to and maximum Y electric current right, and it is pair right with this first and second Y electric current more to sense this first and second X electric current.To reaching right X of maximum Y electric current and Y sensing bar 35,36, below further explanation will be arranged corresponding to each maximum X electric current with as the basis of judging each contact position.
Then, this electric current comparing unit 44 compares pairing first and second X electric current in each contact and one the one X and the 2nd X reference current (not shown) respectively, to obtain an electric current change amount Δ I of these first and second X electric current I in regular turn.In a preferred embodiment, this first and second X reference current is corresponding X sensing bar 35 electric current I on two X side X1 and X2 respectively before the corresponding person of multiconductor P1 and P2 occurs.Similarly, an electric current change amount Δ I of this first and second Y electric current I also can be obtained, and first and second Y reference current is also given in a similar manner.
This number of contacts identifying unit 45 is used to judge earlier the existence that whether has on the above-mentioned X sensing bar 36 more than a contact; Judge promptly whether multiconductor P1 is identical with the y coordinate of P2 at this moment.
On a single X sensing bar 35, because the existence of a contact can make the impedance on it descend, so first and second corresponding X electric current I can rise.Impedance on this single X sensing bar 35 when existing more than a contact is lower again, so the time correspondence first and second X electric current I can further rise.
By above-mentioned principle, number of contacts identifying unit 44 judges that the change amount Δ I of first and second X electric current I of above-mentioned X sensing bar 35 is that the top has existing more than a contact greater than this first and second X reference current with one first critical value, and judge above-mentioned X sensing bar 35 first and second X electric current I change amount Δ I respectively greater than this first and second X reference current with one second critical value, for there is a single-contact existence top.Similarly, number of contacts identifying unit 44 is then and also to contact P1, and P2 judges whether it has identical X coordinate x and the existence that whether has or not the contact of identical X coordinate x, and it is similar whether its decision procedure and above-mentioned judgement contact P1, P2 have identical Y coordinate y.
Then, for the change amount Δ I of first and second X electric current I respectively greater than this first and second X reference current with first critical value, a Y position of these first coordinate identifying unit, 46 given its corresponding X sensing bars 35 is this Y coordinate y more than a contact; For the change amount Δ I of this first and second X current sensor I greater than this first and second X reference current with this second critical value but less than this first critical value, 46 X coordinate x to corresponding X sensing bar 35 of the first coordinate identifying unit are calculated, with as this single-contact x coordinate, wherein this single-contact X coordinate x is judged according to following formula:
x＝(ΔI2-ΔI1)/(ΔI1+ΔI2) (1)。
Similarly, the first coordinate identifying unit 46 is also calculated a Y coordinate y of corresponding Y sensing bar 36, and with as this single-contact Y coordinate y, wherein this single-contact Y coordinate y is judged according to following formula:
y＝(ΔI4-ΔI3)/(ΔI3+ΔI4) (2)。
Because multiconductor P1 is identical with the X coordinate x of P2 among Fig. 5, so the time accordingly first and second X electric current I change amount Δ I respectively greater than this first and second reference current with first critical value, so the Y coordinate y of multiconductor P1 and P2 promptly is recorded.But if this moment, multiconductor was P1 and P2 ', with this first critical value, this moment, the X coordinate figure x of multiconductor P1 and P2 ' press following formula (1) calculating respectively to the change amount Δ I that does not then have first and second X electric current I greater than this first and second reference current.
Then, be judged as the top for above-mentioned X sensing bar 35 and have situation about existing more than a contact, this second coordinate identifying unit 47 utilizes two Y side Y1, the change amount Δ I of above-mentioned first and second Y electric current I on the Y2 calculates this each Y coordinate y more than a contact, be that multiconductor is the example of P1 and P2 ', to obtain the multiconductor P1 that is positioned at same Y position respectively, coordinate x and the y of P2.
If be determined on directions X more than a contact, and also be determined on the Y direction more than a contact, then needed according to each X and the Y coordinate x that had before tried to achieve than the Y coordinate y of the contact of aftertreatment this moment, y determines last multifinger (x, y) coordinate.In addition, judged originally that the Y coordinate y more than a contact that obtains also can be identified at this moment again.
At last, X and the Y coordinate x of 48 couples of above-mentioned each contact P1 that obtains of this position coordinates identifying unit and P2 or P2 ', y is paired into a complete two-dimensional coordinate, with the coordinate position that determines this multiconductor P1 and P2 or P2 ' (x1, y1) with (x2, y2).
Fig. 6 is the process flow diagram of the method for judgement multi-contact positions on projective capacitive touch panel of the present invention, and please cooperate the explanation of Fig. 3 and Fig. 5.
As shown in Figure 6, at first many X external wires 59 and many Y external wires 59 evenly are connected to this X side X1 respectively, many X sensing bars 35 on the X2 and this Y side Y1, many Y sensing bar 36 (steps 601) on the Y2.
Then, two X side X1 of these many X sensing bars 35, at first provided with a sensing voltage Vs by external wire 59 respectively on the X2, then also then provided this sensing voltage Vs in the same manner on two Y side Y1 of the transparent sensed layer 32 of this Y and the Y2, with at this multiconductor P1, when P2 or P2 ' occur at these many X and Y sensing bar 35, respectively form at least one X electric current to group on 36 at least one group of corresponding X sensing bar 35, and at least one group of corresponding Y sensing bar 36, respectively form at least one Y electric current to group (step 602), wherein X and Y electric current have been illustrated in to the notion of group, and existing just omission is again to its explanation.
In fact, it is right that this at least one corresponding X electric current all comprises at least one X electric current to each that organize, and right each of this at least one X electric current all has one first and one the 2nd X part electric current I, and this first and second X part electric current is all this multiconductor P1, and P2 or P2 ' separate in this at least one contact of organizing on the corresponding person on the corresponding X sensing bar 35.As this multiconductor P1, at least one of P2 or P2 ' is during more than a contact on this correspondence X sensing bar 35, the one X part electric current X1 is formed at this X side X1 and should be bordering between this X side X1 person more than one of a contact, and the 2nd X part electric current I is formed on this X side X2 and should be bordering between this X side X2 person more than one of a contact.
Similarly, it is right that this at least one corresponding Y electric current comprises at least one Y electric current at least one that organize, and right each of this at least one Y electric current all has one first and one the 2nd Y part electric current I, and this first and second Y part electric current I is all this multiconductor P1, and P2 or P2 ' separate in this at least one contact of organizing on the corresponding person on the corresponding Y sensing bar 36.As this multiconductor P1, at least one of P2 or P2 ' is during more than a contact on this correspondence Y sensing bar 36, the one Y part electric current I is formed on a Y side Y1 and should be bordering between this Y side Y1 person more than one of a contact, and the 2nd Y part electric current I is formed on this Y side Y2 and should be bordering between this Y side Y2 person more than one of a contact.
Then, distinguish this X of sensing and Y sensing bar 35 in regular turn, X electric current on each of 36 and a Y electric current, to obtain this at least one group of X electric current respectively to reaching this at least one group of Y electric current to group, first and second X part electric current I of each that judge respectively that this at least one X electric current is right, and first and second right Y part electric current I of first and second Y electric current of right each of this at least one Y electric current, and judge maximum first and second Y part electric current I in maximum first and second X part electric current I of one in this first and second X part electric current I and this first and second Y part electric current I respectively, and should first and second X of maximum and the Y electric current be used as first and second X and Y electric current I (step 603) respectively at this.
Then, relatively this first and second X electric current I and first and second X reference current respectively, and then relatively this first and second Y electric current I and first and second Y reference current respectively are to obtain an electric current change amount Δ I (step 604) of this first and second X and Y electric current respectively.
Then, whether judge the existence that whether has on the X sensing bar 35 of this first and second X electric current I correspondence more than a contact according to the electric current change amount Δ I of this first and second X electric current I respectively greater than one first critical value, and respectively according to the change amount Δ I of this first and second X electric current I whether less than this first critical value but judge only tool one single-contact existence on the X sensing bar 35 of this first and second X electric current I correspondence greater than one second critical value, and whether judge the existence that whether has on the Y sensing bar 36 of this first and second Y electric current I correspondence more than a contact according to the change amount Δ I of this first and second Y electric current I respectively greater than one first critical value, and respectively according to the change amount Δ I of this first and second Y electric current I whether less than this first critical value but judge on the Y sensing bar 36 of this first and second Y electric current I correspondence only tool one single-contact exist (step 605) greater than one second critical value.
Then, on this correspondence X sensing bar 35, judge to have this Y coordinate y, and on this correspondence X sensing bar 35, judge the X and the Y coordinate x of single-contact position, y (step 606) more than the position of a contact.
Then, single-contact X coordinate x and the Y coordinate y of judgement on this correspondence Y sensing bar 36, and according to single-contact X and the Y coordinate x on this correspondence X sensing bar 35, Y coordinate y on y, this correspondence X sensing bar 35 more than a contact, and the single contact on this correspondence Y sensing bar 36 and more than the x of a contact and y coordinate by to judge this X and Y coordinate x on this corresponding X sensing bar more than each contact position of a contact, y, and to confirming (step 607) again more than the Y coordinate y of the contact position of a contact on this this correspondence X sensing bar 35 of having judged in addition.
At last, this multiconductor P1 through judging, coordinate x and y are carried out pairing on the X of P2 and the Y-axis, and to determine this multiconductor P1, (x1 is y1) with (x2, y2) (step 608) for the position coordinates of P2.
In above-mentioned, this step at the locational single-contact X coordinate x of an X of obtaining of step 605 is obtained with above-mentioned relational expression (1), and the obtaining this and have the step of single-contact Y coordinate y to obtain with above-mentioned relational expression (2) on a Y position of step 405.
In different embodiment, the location swap of the transparent sensed layer 32,34 of this X and Y.In different embodiment, the transparent sensed layer 34 of this Y is carried out this sensing voltage Vs earlier, and the transparent sensed layer of this X 32 is by then this sensing voltage Vs in addition.
The application of the invention, multifinger position is determined on the capacitance type touch-control panel of tool sensing patterns fully, and this kind contact panel can formally be used on the multiconductor touch-control.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (11)
1. device of judging multi-contact positions on projective capacitive touch panel, wherein this projective capacitive touch panel comprises the transparency carrier that similar shape forms and up piles up in regular turn, the transparent sensed layer of one Y, one transparent dielectric layer and the transparent sensed layer of an X, the transparent sensed layer of this X has many X sensing bars of arranging along a directions X, and on this directions X, have one the one X side and one the 2nd an X side, the transparent sensed layer of this Y has many Y sensing bars of arranging along a Y direction, and on this Y direction, have one the one Y side and one the 2nd a Y side, this multiconductor makes the transparent sensed layer of this X contact on this multi-contact positions with the transparent sensed layer of this Y, it is characterized in that this device comprises:
Many X external wires and many Y external wires are by respectively in order to electrically connect these many X and Y sensing bar in along this first and second X side and this first and second Y side place with one-one relationship;
One sensing source, being used to provides one to exchange many X sensing bars of sensing voltage to an X side and the 2nd X side by these many X external wires in regular turn, and then provide this interchange sensing voltage to many Y sensing bars of a Y side and the 2nd Y side by these many Y external wires in regular turn, when this multiconductor occurs, at least one group of corresponding X sensing bar of these many X and Y sensing bar, respectively to form at least one X electric current to group, and at least one group of corresponding Y sensing bar, respectively form at least one Y electric current to group, wherein all to comprise at least one X electric current right to each of group for this at least one corresponding X electric current, and right each of this at least one X electric current all has one first and one the 2nd X part electric current, and this first and second X part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding X sensing bar, and when this multifinger at least one be during on this correspondence X sensing bar more than a contact, the one X part electric current is formed on an X side and should be bordering between the X side person more than one of a contact, the 2nd X part electric current is formed on the 2nd X side and should be bordering between the 2nd X side person more than one of a contact, and it is right that this at least one corresponding Y electric current comprises at least one Y electric current at least one that organize, and right each of this at least one Y electric current all has one first and one the 2nd Y part electric current, and this first and second Y part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding Y sensing bar, and when this multifinger at least one be during on this correspondence Y sensing bar more than a contact, the one Y part electric current is formed on a Y side and should be bordering between the Y side person more than one of a contact, and the 2nd Y part electric current is formed on the 2nd Y side and should be bordering between the 2nd Y side person more than one of a contact;
One current sensing unit, be used in regular turn respectively an X electric current and a Y electric current on each of this first and second X and this X of Y side sensing and Y sensing bar, to obtain this at least one group of X electric current respectively to reaching this at least one group of Y electric current to group, first and second X part electric current of each that judge respectively that this at least one X electric current is right, and first and second right Y part electric current of first and second Y electric current of right each of this at least one Y electric current, and judge maximum first and second Y part electric current in maximum first and second X part electric current of one in these these first and second X part electric currents and this these first and second Y part electric currents respectively, and should first and second X of maximum and Y part electric current be used as first and second X and Y electric current electric current comparing unit respectively, be used to respectively relatively this first and second X electric current and first and second X reference current, and then relatively this first and second Y electric current and first and second Y reference current respectively, to obtain an electric current change amount of this first and second X and Y electric current respectively;
One number of contacts identifying unit, the electric current change amount according to this first and second X electric current of being used to is respectively judged the existence that has on the X sensing bar of this first and second X electric current correspondence more than a contact during greater than one first critical value, and judge only tool one single-contact existence on the X sensing bar of this first and second X electric current correspondence respectively during less than this first critical value but greater than one second critical value according to the change amount of this first and second X electric current, and judge the existence that has on the Y sensing bar of this first and second Y electric current correspondence more than a contact respectively during greater than one first critical value according to the change amount of this first and second Y electric current, and judge only tool one single-contact existence on the Y sensing bar of this first and second Y electric current correspondence respectively during less than this first critical value but greater than one second critical value according to the change amount of this first and second Y electric current;
One first coordinate identifying unit is used to judge that this is judged as has this Y coordinate y more than the position of a contact on this correspondence X sensing bar, and judges that this is judged as the X and the Y coordinate x of the single-contact position on this correspondence X sensing bar, y;
One second coordinate identifying unit, be used to judge that this is judged as single-contact X coordinate x and Y coordinate y on this correspondence Y sensing bar, and be determined to single-contact X and Y coordinate x on this correspondence X sensing bar according to this, y, Y coordinate y on this correspondence X sensing bar more than a contact, and judge this X and Y coordinate x on this corresponding X sensing bar more than each contact position of a contact at the single contact on this correspondence Y sensing bar and more than the x of a contact and y coordinate, y, and the Y coordinate Y more than the contact position of a contact on this this correspondence X sensing bar of having judged confirmed again; And
One position coordinates identifying unit is used to match single contact on this correspondence X and the Y sensing bar and more than the x and the y coordinate of a contact, to determine this multifinger position; Wherein:
The judgement to a single-contact x position of this first coordinate identifying unit is carried out according to the following relationship formula:
X=(Δ I2-Δ I1)/(Δ I1+ Δ I2), and
The judgement to a single-contact y position of this second coordinate identifying unit is carried out according to the following relationship formula:
y＝(ΔI4-ΔI3)/(ΔI3+ΔI4)，
Wherein Δ I1, Δ I2, Δ I3 and Δ I4 are respectively the electric current change amount of an X, the 2nd X, a Y, the 2nd Y electric current.
2. the device of judgement multi-contact positions on projective capacitive touch panel according to claim 1, it is characterized in that, wherein this first and second X reference current is the electric current of this first and second X electric current before this multiconductor occurs, and this first and second Y reference current is the electric current of this first and second Y electric current before this multiconductor occurs.
3. the device of judgement multi-contact positions on projective capacitive touch panel according to claim 1 is characterized in that, wherein:
I1 and I2 are respectively this first and second X electric current, and I3 and I4 are respectively this first and second Y electric current, and Δ I1, Δ I2, Δ I3 and Δ I4 be respectively I1, I2, I3 and I4 this multiconductor occur in occur before a difference.
4. the device of judgement multi-contact positions on projective capacitive touch panel according to claim 1 is characterized in that, wherein the location swap of this X and the transparent sensed layer of Y.
5. the device of judgement multi-contact positions on projective capacitive touch panel according to claim 1 is characterized in that, wherein the transparent sensed layer of this Y is by first in addition this sensing voltage, the transparent sensed layer of this X by after this sensing voltage in addition.
6. method of judging multi-contact positions on projective capacitive touch panel, wherein this projective capacitive touch panel comprises the transparency carrier that similar shape forms and up piles up in regular turn, the transparent sensed layer of one Y, one transparent dielectric layer and the transparent sensed layer of an X, the transparent sensed layer of this X has many X sensing bars of arranging along a directions X, and on this directions X, have one the one X side and one the 2nd an X side, the transparent sensed layer of this Y has many Y sensing bars of arranging along a Y direction, and on this Y direction, have one the one Y side and one the 2nd a Y side, this multiconductor makes transparent sensed layer of this X and the transparent sensed layer of this Y transparent dielectric layer that contacts on this multi-contact positions, it is characterized in that this method comprises the following step:
Many X external wires and many Y external wires are by respectively in order to electrically connect these many X and Y sensing bar in along this first and second X side and this first and second Y side place with one-one relationship;
Provide one to exchange many X sensing bars of sensing voltage by these many X external wires in regular turn to an X side and the 2nd X side, and then provide this interchange sensing voltage to many Y sensing bars of a Y side and the 2nd Y side by these many Y external wires in regular turn, when this multiconductor occurs, at least one group of corresponding X sensing bar of these many X and Y sensing bar, respectively to form at least one X electric current to group, and at least one group of corresponding Y sensing bar, respectively form at least one Y electric current to group, wherein all to comprise at least one X electric current right to each of group for this at least one corresponding X electric current, and right each of this at least one X electric current all has one first and one the 2nd X part electric current, and this first and second X part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding X sensing bar, and when this multifinger at least one be during on this correspondence X sensing bar more than a contact, the one X part electric current is formed on an X side and should be bordering between the X side person more than one of a contact, the 2nd X part electric current is formed on the 2nd X side and should be bordering between the 2nd X side person more than one of a contact, and it is right that this at least one corresponding Y electric current comprises at least one Y electric current at least one that organize, and right each of this at least one Y electric current all has one first and one the 2nd Y part electric current, and this first and second Y part electric current is all this and multifingerly separates in this at least one contact of organizing on the corresponding person on the corresponding Y sensing bar, and when this multifinger at least one be during on this correspondence Y sensing bar more than a contact, the one Y part electric current is formed on a Y side and should be bordering between the Y side person more than one of a contact, and the 2nd Y part electric current is formed on the 2nd Y side and should be bordering between the 2nd Y side person more than one of a contact;
X electric current and a Y electric current on each of first and second x and this X of y side sensing and Y sensing bar respectively in regular turn, right to obtain this at least one X electric current respectively to reaching this at least one Y electric current, first and second X part electric current of each that judge respectively that this at least one X electric current is right, and first and second right Y part electric current of first and second Y electric current of right each of this at least one Y electric current, and judge maximum first and second Y part electric current in maximum first and second X part electric current of one in these first and second X part electric currents and these first and second Y part electric currents respectively, and should first and second X of maximum and Y part electric current be used as first and second X and Y electric current respectively;
Relatively this first and second X electric current and first and second X reference current respectively, and then relatively this first and second Y electric current and first and second Y reference current respectively are to obtain an electric current change amount of this first and second X and Y electric current respectively;
Judge the existence that has on the X sensing bar of this first and second X electric current correspondence more than a contact respectively during greater than one first critical value according to the electric current change amount of this first and second X electric current, and judge only tool one single-contact existence on the X sensing bar of this first and second X electric current correspondence respectively during less than this first critical value but greater than one second critical value according to the change amount of this first and second X electric current, and judge the existence that has on the Y sensing bar of this first and second Y electric current correspondence more than a contact respectively during greater than one first critical value according to the change amount of this first and second Y electric current, and judge only tool one single-contact existence on the Y sensing bar of this first and second Y electric current correspondence respectively during less than this first critical value but greater than one second critical value according to the change amount of this first and second Y electric current;
Judge that this is judged as on this correspondence X sensing bar and has this y coordinate more than the position of a contact, and judge that this is judged as the x and the y coordinate of the single-contact position on this correspondence X sensing bar;
Judge that this is judged as single-contact X coordinate x and Y coordinate y on this correspondence Y sensing bar, and be determined to single-contact X and Y coordinate x on this correspondence X sensing bar according to this, y, at the Y coordinate y on this correspondence X sensing bar more than a contact, and judge this X and Y coordinate x on this corresponding X sensing bar more than each contact position of a contact at the single contact on this correspondence Y sensing bar and more than the x of a contact and y coordinate, y, and the Y coordinate y more than the contact position of a contact on this this correspondence X sensing bar of having judged confirmed again; And
Match single contact on this correspondence X and the Y sensing bar and more than the x and the y coordinate of a contact, to determine this multifinger position;
Wherein this judgement this be judged as the x of single-contact contact position and the step of y coordinate is carried out according to the following relationship formula respectively:
X=(Δ I2-Δ I1)/(Δ I1+ Δ I2), and
y＝(ΔI4-ΔI3)/(ΔI4+ΔI3)，
Wherein Δ I1, Δ I2, Δ I3 and Δ I4 are respectively the electric current change amount of an X, the 2nd X, a Y, the 2nd Y electric current.
7. the method for judgement multi-contact positions on projective capacitive touch panel according to claim 6, it is characterized in that, wherein this respectively relatively this first and second X part electric current and first and second X reference current, and then relatively more comprise the following step respectively before the step of this first and second Y part electric current and first and second Y reference current:
Before this multiconductor occurred, this first and second X of sensing and Y electric current were with respectively as this first and second X and Y reference current respectively.
8. the method for judgement multi-contact positions on projective capacitive touch panel according to claim 6, it is characterized in that, wherein I1 and I2 are respectively this first and second X electric current, I3 and I4 are respectively this first and second Y electric current, and Δ I1, Δ I2, Δ I3 and Δ I4 be respectively I1, I2, I3 and I4 this multiconductor occur in occur before a difference.
9. the method for judgement multi-contact positions on projective capacitive touch panel according to claim 6 is characterized in that, wherein the location swap of this X and the transparent sensed layer of Y.
10. the method for judgement multi-contact positions on projective capacitive touch panel according to claim 6 is characterized in that, wherein the transparent sensed layer of this X is by first in addition this sensing voltage, the transparent sensed layer of this Y by after this sensing voltage in addition.
11. the method for judgement multi-contact positions on projective capacitive touch panel according to claim 6, it is characterized in that first and second X and Y electric current when wherein this first and second X and Y reference current are respectively on corresponding X on this corresponding contact and the Y sensing bar and do not occur in this contact.
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| CN101065904A (en) * | 2004-09-24 | 2007-10-31 | 触摸传感器技术有限责任公司 | Contactless multiposition switches using capacitive touch sensors |
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| CN101051255A (en) * | 2006-04-06 | 2007-10-10 | 达诺光电股份有限公司 | Capacitance type touch-control panel with improved electrode pattern |
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