CN101561736A - Projective capacitive touch-control device for preventing conducting material from influencing contactor detection and method thereof - Google Patents
Projective capacitive touch-control device for preventing conducting material from influencing contactor detection and method thereof Download PDFInfo
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- CN101561736A CN101561736A CNA200910004920XA CN200910004920A CN101561736A CN 101561736 A CN101561736 A CN 101561736A CN A200910004920X A CNA200910004920X A CN A200910004920XA CN 200910004920 A CN200910004920 A CN 200910004920A CN 101561736 A CN101561736 A CN 101561736A
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Abstract
The invention discloses a projective capacitive touch-control device for preventing conducting material from influencing contactor detection and a method thereof. The projective capacitive touch-control device comprises a first sensing layer, a second sensing layer, a signal loaded line and a sensing unit; wherein the first sensing layer has a plurality of first axial leads which are electrically isolated with each other and correspondingly and electrically connected with a plurality of first connecting outer conductors; the second sensing layer has a plurality of second axial leads which are electrically isolated with each other and correspondingly and electrically connected with a plurality of second connection outer conductors; wherein the second sensing layer is overlapped on a dielectric layer, the first sensing layer and a substrate in sequence; the signal loaded line is electrically connected with the first connecting outer conductors and the second connecting outer conductors and is used for supplying a first sensing signal; the sensing unit electrically connected with the first connecting outer conductors and the second connecting outer conductors and is used for detecting the sensing signals of the first axial leads and the second axial leads.
Description
Technical field
The present invention relates to contactor control device, particularly relate to a kind of projective capacitive touch-control device and method that prevents that the conductive materials influencing contactor from detecting.
Background technology
The touch technology that electronic equipment is commonly used has at present: resistance-type (resistive), surface capacitance type (surface capacitive), projected capacitive (projected capacitive), surface acoustic wave (surface acoustic wave), optical image formula (optics imaging), infrared-type (infrared), refraction type (bending wave) and digital conversion formula (activedigitizer) ... Deng.Preceding 3 kinds of technology are because packaging housing is long-pending less, and precision can be done higherly relatively, therefore are applicable to carry-on running gear or the consumption electronic products that volume is less.
With regard to the electric resistance touch-control technology, screen detects to the contact from pressing, data operation and location confirmation, its technical restriction that physical condition is arranged, that is, if will increase area of detection or resolution, just must increase the line number, and line is counted increase and promptly represented and must handle operational data and increase relatively, this will be a burden greatly to processor.And, the affirmation that presses mechanism mainly is to be finished by the mechanical type action, how the PET film strengthens that material is withstand voltage to promote, wear-resisting again, resistance to deformation etc., its limit is still arranged after all, it is more and more poor to cause transparency to show because of service time, frequency increase thus, also can excessively use wearing and tearing as for the contact detection because of regular contact scope fixedly causes some given zone, and then the conducting efficient of attenuating ITO conducting film contact, moreover, the ITO conducting film must be reserved frame, thereby the alternative of restriction industrial design.In addition, the electric resistance touch-control technology also can't reach nearside induction (finger is near not pressing status detection) and the more difficult requirement how finger presses.
The surface capacitance type touch technology must not use the ITO conducting film of high precision, thus press the physical construction that side does not have similar resistance-type, therefore do not have wearing and tearing or occur similar machinery tired press sensitivity decline phenomenon, and also can detect the nearside induction.Yet, the surface capacitance type touch technology but has the problem of hand shadow effect to exist, that is, during the operating surface capacitance touch control screen, if with the together close screen surface of wrist and finger, then can make ITO conducting film surface produce multi-charge, and then cause electric capacity generation coupling to cause a large amount of sensing mistakes with the panel side.In addition, because surface capacitance type is to carry out the contact by the electric field change of screen surface to detect, therefore environment for use as if electromagnetic interference problem more for a long time, the also therefore precision that detects of influencing contactor, and after long-time the use, the contact is detected and also is easy to generate skew, therefore needs regularly or regular calibration.
Please refer to Figure 1A, it is the three-dimensional exploded view of an existing projected capacitive touch panel 100.This projected capacitive touch panel 100 comprises a substrate 110 at least; one first sensed layer 120; one dielectric layer 130; one second sensed layer 140 and a binding layer (bonding layer) and a protective seam (not drawing) similar shape storehouse from lower to upper form; wherein these a little elements are all transparent; and first sensed layer 120 has a plurality of first patternizations (patterned) electrode 122 and is connected in series relatively by many first axial leads 124; and then connect outer conductor 126 relative electric connections with many first; and second sensed layer 140 has a plurality of second pattern polarizing electrodes 142 and is connected in series relatively by many second axial leads 144, and then connects outer conductor 146 relative electric connections with many second.In this diagram, first axially be Y-axis to and second axially be X axis, so be not limited thereto, also can first axially be X axis and second axial be Y-axis to etc. variation.
Please refer to Figure 1B, it is actuating circuit 150 synoptic diagram of the projected capacitive touch panel 100 shown in Figure 1A.Many first, second connects outer conductor 126,146 and is electrically connected to a sensing cell 160, and a plurality of first, second pattern polarizing electrodes 122,142, many first, second axial leads 124,144 and first, second relativeness that connects outer conductor 126,146 have illustrated in Figure 1A, so do not repeat them here.When this circuit operation, sensing cell 160 provides a sensing signal via each first company's outer conductor 126 to its pairing first axial lead 124 in regular turn, and then providing this sensing signal via each second company's outer conductor 146 to its pairing second axial lead 144 in regular turn, 124,144 of first, second axial leads that are not provided with sensing signal therebetween are grounded or the accurate position of fixed voltage.Because first, second axial lead 124,144 can have stray capacitance (stray capacitance) to each other, therefore when the user when pointing or coming close to or in contact with the contact TP on the projected capacitive touch panel 100 with conductive materials, finger on the TP of contact or conductive materials promptly form an extra capacitor with first, second axial lead 124,144, so the equivalent capacitance value in TP position, contact also can change immediately, and the position of the sensing cell 160 relatively large variable quantity decision contact by measuring corresponding current or charge transfer quantity (for example: (X
3, Y
5)).Letter speech, the controlled quentity controlled variable slowdown monitoring circuit loads on first, second axial lead of each bar in regular turn by the sensing signal that will measure, and the relatively large variable quantity that measures when loading sensing signal institute's corresponding current that produces or charge transfer quantity is to determine contact position.Wherein, load sensing signal in regular turn in a certain axial lead and scan its electric current or during the charge variation amount, the equal ground connection of all the other all axial leads or be electrically connected to the accurate position of a fixed voltage is guaranteed the consistance of stray-capacity effect thus.
Yet, when a conduction foreign matter zone OZ is arranged on the projected capacitive touch panel 100 (for example: water or other conductive materials), then conduct electricity between the axial lead of OZ position, foreign matter zone equivalent electrical circuit and equivalent stray capacitance also can with change, thereby cause controlled quentity controlled variable slowdown monitoring circuit (sensing cell 160) to sense the variation of electric current on the axial lead or charge transfer quantity and cause judging by accident and misoperation.Perhaps, when the axial lead of TP position, contact is loaded sensing signal and measures electric current or but conducted electricity the influence of foreign matter zone OZ during the charge variation amount, make and formerly should measure relatively large corresponding current or charge transfer quantity, but be connected to adjacent shaft guiding line ground connection, therefore the also correct position of sensing contact TP because of conduction foreign matter zone OZ is other.
Summary of the invention
Because above-mentioned shortcoming the invention provides a kind of projective capacitive touch-control device and method that prevents that the conductive materials influencing contactor from detecting, it can improve the problem that existing projective capacitive touch-control device detects because of conduction foreign matter influencing contactor.
One of purpose of the present invention loads a sensing signal in the contact panel axial lead, eliminates I_cross (the axial lead magnitude of current to each other) and Q_cross (axial lead charge transfer quantity to each other) between each axial lead thus.
The present invention discloses a kind of projective capacitive touch-control device that prevents that the conductive materials influencing contactor from detecting, and it comprises: one first sensed layer has many first axial leads electrical isolation and many first companies of corresponding electric connection outer conductors each other; One second sensed layer has many second axial leads electrical isolation and corresponding electrically connect many second and connect outer conductors each other, and wherein this second sensed layer is folded in regular turn mutually on a dielectric layer, this first sensed layer, a substrate; One signal loaded line electrically connects this a little first, second and connects outer conductor, in order to one first sensing signal to be provided; And a sensing cell, electrically connect this a little first, second and connect outer conductor, in order to detect the sensing signal of this a little first, second axial leads.
The present invention also discloses a kind of projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting, it comprises the following step: provide one first sensing signal in many first, second axial leads, wherein these a little first, second axial leads electrical isolation each other; Detect a plurality of second, third sensing signals of these a little first, second axial leads simultaneously, wherein these a little second, third sensing signals are that these a little first, second axial leads receive this corresponding generation of first sensing signal institute; And change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with these a little second, third sensing signals respectively in this relative coordinate.
The present invention also discloses a kind of projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting, it comprises the following step: provide one first sensing signal in many first, second axial leads, wherein these a little first, second axial leads electrical isolation each other; Detect a plurality of second sensing signals of these a little first axial leads; Detect a plurality of the 3rd sensing signals of these a little second axial leads, wherein these a little second, third sensing signals are that these a little first, second axial leads receive this corresponding generation of first sensing signal institute; And change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with these a little second, third sensing signals respectively in this relative coordinate.
The present invention disclose in addition a kind of projected capacitive touch method that prevents the detection of conductive materials influencing contactor, and it comprises the following step: provide one first sensing signal in many first axial leads, wherein these a little first axial leads electrical isolation each other; Detect a plurality of second sensing signals of these a little first axial leads and a plurality of the 3rd sensing signals of many second axial leads simultaneously, these a little second axial leads also electrical isolation each other of electrical isolation and a little therewith first axial lead each other wherein, a little for this reason respectively first, second axial leads of these a little second, third sensing signals receive this first sensing signal, corresponding this corresponding generation of a little second sensing signals institutes; And change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with these a little second, third sensing signals respectively in this relative coordinate.
The present invention discloses a kind of projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting again, and it comprises the following step: provide one first sensing signal in many first axial leads, wherein these a little first axial leads electrical isolation each other; Detect a plurality of second sensing signals of these a little first axial leads; Detect a plurality of the 3rd sensing signals of many second axial leads, these a little second axial leads also electrical isolation each other of electrical isolation and a little therewith first axial lead each other wherein, a little for this reason respectively first, second axial leads of these a little second, third sensing signals receive this first sensing signal, corresponding this corresponding generation of a little second sensing signals institutes; And change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with these a little second, third sensing signals respectively in this relative coordinate.
The present invention discloses a kind of projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting again, and it comprises the following step: provide one first sensing signal in many first axial leads, wherein these a little first axial leads electrical isolation each other; Detect a plurality of second sensing signals of many second axial leads, wherein these a little second axial leads also electrical isolation each other of electrical isolation and a little therewith first axial lead each other; Detect a plurality of the 3rd sensing signals of these a little first axial leads, wherein these a little second sensing signals are corresponding these corresponding generations of a little the 3rd sensing signal institutes of these a little second axial leads, and these a little the 3rd sensing signals are that these a little first axial leads receive this corresponding generation of first sensing signal institute; And change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with these a little second, third sensing signals respectively in this relative coordinate.
Description of drawings
Figure 1A is the three-dimensional exploded view of an existing projected capacitive touch panel;
Figure 1B is the actuating circuit synoptic diagram of the projected capacitive touch panel shown in the figure A1;
Fig. 2 A is the actuating circuit synoptic diagram of a preferred embodiment of the present invention;
Fig. 2 B is the local circuit synoptic diagram of another preferred embodiment of Fig. 2 A;
Fig. 2 C is the local circuit synoptic diagram of the another preferred embodiment of Fig. 2 A;
Fig. 3 A is the action flow chart of a preferred embodiment of the present invention;
Fig. 3 B is the action flow chart of another preferred embodiment of the present invention;
Fig. 3 C is the action flow chart of another preferred embodiment of the present invention; And
Fig. 3 D is the action flow chart of two preferred embodiments more of the present invention.
[main element symbol description]
100 contact panels, 110 substrates
120 first sensed layer, 122 first pattern polarizing electrodes
124 first axial leads 126 first connect outer conductor
130 dielectric layers, 140 second sensed layer
142 second pattern polarizing electrodes, 144 second axial leads
146 second connect outer conductor
150 projected capacitive touch panel actuating circuits
160 sensing cells
200 preferred embodiments of the present invention
210 multiplexers, 220 sensing cells
230 gauge tap, 232 signal loaded line
234,236 pin V
RefSensing signal
CS control signal TP, TP
1, TP
2The contact
OZ conduction foreign matter zone
X
1~ X
9Corresponding X coordinate figure Y
1~ Y
6Corresponding Y coordinate figure
302,304,306 a preferred embodiment of the present invention steps
312, another preferred embodiment step of 314,316,318 the present invention
322, the another preferred embodiment step of 324,326 the present invention
332,334A, 334B, 336A, 336B, the present invention two preferred embodiment steps 338 again
Embodiment
It is as follows that the present invention will describe some embodiment in detail.Yet except the disclosed embodiments, the embodiment that the present invention can also be used in other widely implements.Scope of the present invention is not subjected to the qualification of those embodiment, is be as the criterion with its claim.And be familiar with this skill person and can understand summary of the invention of the present invention for clearer description being provided and making, each several part is not drawn according to its relative size in the diagram, some size is highlighted and the exaggeration that seems with the ratio regular meeting of other scale dependent, and incoherent detail section is not also drawn fully, in the hope of illustrated succinct.
Please refer to Fig. 2 A, it is actuating circuit 200 synoptic diagram of a preferred embodiment of the present invention.One projected capacitive touch panel 100 comprises (please refer to Figure 1A) at least: one first sensed layer 120, have many first axial leads 124 electrical isolation and corresponding electrically connect many first and connect outer conductors 126 each other, wherein first sensed layer 120 also comprises a plurality of first pattern polarizing electrodes 122 and periodically is serially connected with the first corresponding axial lead 124; One second sensed layer 140; have many second axial leads 144 electrical isolation and many second companies of corresponding electric connection outer conductors 146 each other; wherein second sensed layer 140 also comprises second axial lead 144 that a plurality of second pattern polarizing electrodes 142 periodically are serially connected with correspondence; wherein second sensed layer 140 is folded mutually on a dielectric layer 130; dielectric layer 130 is folded mutually on first sensed layer 120; first sensed layer 120 is folded mutually on a substrate 110, and binding layer is folded on second sensed layer 140 mutually with protective seam (not drawing).In the present embodiment, first sensed layer 120, the first pattern polarizing electrode 122, first axial lead 124, second sensed layer 140, the second pattern polarizing electrode 142, second axial lead 144, substrate 110, dielectric layer 130, binding layer and protective seam comprise transparent material.In addition, first axial lead 124 axially be Y-axis to and second axial lead 144 axially be X axis, so be not limited thereto, can also be first axial lead 124 axially for the X axis and second axial lead 144 axially for Y-axis to, perhaps two axial leads 124,144 axially be non-90 to spend the variation of angles etc.
Referring again to Fig. 2 A, a signal loaded line 232 electrically connects first, second and connects an outer conductor 126,146 and a gauge tap 230, transmits one first sensing signal V in order to receive
Ref, the electric connection signal loaded line 232 of first pin of gauge tap 230 wherein, its 3rd pin 236 receives a control signal CS to control the first sensing signal V that its second pin 234 is received
RefBe sent to first, second and connect outer conductor 126,146.One sensing cell 220 is to electrically connect first, second by a multiplexer 210 to connect outer conductor 126,146, in order to the sensing signal of first, second axial lead 124,144 of detecting the corresponding electric connection of institute.In the present embodiment, gauge tap 230 can be an electronic switch (for example: transistor, cmos element or optical coupling element etc.), also can be an electromechanical switch (for example: electronic type magnetic reed switch etc.), and sensing cell 220 can be a current detector or an electric charge detector, moreover, multiplexer 210 also can be adjusted increase with the speed of required contact position judgement according to whole cost restriction with the quantity of sensing cell 220, this part can be known by inference according to present embodiment for haveing the knack of this skill person, so repeat no more.
Referring again to Fig. 2 A, when gauge tap 230 was accepted control signal CS control conducting, first, second connected the first sensing signal V that outer conductor 126,146 receives from signal loaded line 232
Ref, therefore make all first, second axial leads 124,144 also have identical voltage quasi position (the first sensing signal V
Ref), between this moment first, second axial lead 124,144 because of the no-voltage difference exists, so do not have current return formation each other.When if a conduction foreign matter zone OZ is arranged on the projected capacitive touch panel 100 this moment, also can exist because of 124,144 of first, second axial leads there is no voltage difference, so conduction foreign matter zone OZ also can not form current returns with first, second axial lead 124,144, the existence of foreign matter zone OZ of therefore conducting electricity can't change the electric current of 124,144 of first, second axial leads.In the present invention, conduction foreign matter zone OZ be the non-user of general reference with finger or other conductive materials contact surface plate, and have the water on the panel protective seam or the zone of other conductive materials.
And come close to or in contact with a contact TP on the projected capacitive touch panel 100 with finger or with conductive materials as the user
2The time, with contact TP
2Relevant axial lead 124,144 and company's outer conductor 126,146 are (for example: X
7, X
8With Y
4, Y
5) because of contact TP
2Form a conducting loop by user's health ground connection, therefore just have electric current to be formed on its grade.And when 220 pairs of sensing cells respectively connect outer conductor 126,146 and detected, connect outer conductor 126,146 (X
7, X
8, Y
4, Y
5) on electric current or the variation of charge transfer quantity promptly can be predicted, if connect the X of outer conductor 126
8Electric current or charge transfer quantity change greater than X
7Electric current or charge transfer quantity change, and connect the Y of outer conductor 146
5Electric current or charge transfer quantity change greater than Y
4Electric current or charge transfer quantity change, and promptly represent contact TP
2For near coordinate (X
8, Y
5).
And when the user comes close to or in contact with the contact TP1 of conduction foreign matter zone OZ on the projected capacitive touch panel 100 with finger or with conductive materials, with contact TP
1, relevant axial lead 124,144 such as conduction foreign matter zone OZ and (for example: X connect outer conductor 126,146
2, X
3With Y
2, Y
3) also can be not influenced because of the existence of conduction foreign matter zone OZ, that is, owing to previous axial lead 124,144, connect outer conductor 126,146 equipotential states, so work as contact TP
1At the X that connects outer conductor 126,146
2, Y
3When causing the variation of big electric current or charge transfer quantity, also can not be connected the X of outer conductor 126,146
3, Y
2The side is connected to ground, so contact TP
1The position still can correctly be sensed.The inventor this mandatory declaration is, above-mentioned coordinate system only in order to the axial lead 124,144 of explanation present embodiment with its etc. the relation of pairing coordinate system, be not coordinate system in order to the qualification embodiment of the invention.In addition, haveing the knack of this correlation technique person also can know by inference easily, the position of each contact can calculate by the contiguous at least one axial lead in this contact, for example: interpolation method (interpolation) with the variation of the electric current of adjacent shafts guiding line or charge transfer quantity as weight (weight), and with reference to the coordinate of these a little adjacent shafts guiding lines, and then calculate pledge (weight) heart coordinate (center of mass).
In addition, the above embodiments are only with a conductive materials zone OZ and a contact TP
1Or TP
2Be illustrative example, and when a plurality of conduction foreign matters zone or a plurality of contacts existed, above-mentioned explanation was also set up, this part can be known by inference according to present embodiment for haveing the knack of this skill, so do not repeat them here.
Please refer to Fig. 3 A, it is the action flow chart of a preferred embodiment of the present invention, and asks the explanation of while with reference to Fig. 2 A.In step 302, provide one first sensing signal V
RefIn many first axial leads 124 and many second axial leads 144, wherein these a little first, second axial leads 124,144 are electrical isolation each other.In step 304, sensing cell 220 detects a plurality of second, third sensing signals of these a little first, second axial leads 124,144 simultaneously, and wherein these a little second, third sensing signals are that these a little first, second axial leads 124,144 receive the first sensing signal V
RefInstitute is corresponding to be produced.In step 306, sensing cell 220 changes the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact in this relative coordinate with these a little second, third sensing signals respectively.In the present embodiment, first axial lead 124 axially comprise X axis, second axial lead 144 axially comprise Y-axis to, and this relative coordinate comprises the rectangular coordinate of one X-axis-Y-axis, and wherein to comprise between transparent lead and first, second axial lead 124,144 be to isolate with a transparent dielectric layer to first, second axial lead 124,144.In addition, the first sensing signal V
RefBe to provide, and sensing cell 220 can comprise at least one current detector or at least one electric charge detector by a sensing voltage source or a sense current source.
Please refer to Fig. 3 B, it is the action flow chart of another preferred embodiment of the present invention, and asks the explanation of while with reference to Fig. 2 A.In step 312, provide one first sensing signal V
RefIn many first axial leads 124 and many second axial leads 144, wherein these a little first, second axial leads 124,144 are electrical isolation each other.In step 314, sensing cell 220 detects a plurality of second sensing signals of these a little first axial leads 124, and wherein these a little second sensing signals are that these a little first axial leads 124 receive the first sensing signal V
RefInstitute is corresponding to be produced.In step 316, sensing cell 220 detects a plurality of the 3rd sensing signals of these a little second axial leads 144, and wherein these a little the 3rd sensing signals are that these a little second axial leads 144 receive the first sensing signal V
RefInstitute is corresponding to be produced.In step 318, sensing cell 220 changes the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact in this relative coordinate with these a little second, third sensing signals respectively.In the present embodiment, first axial lead 124 axially comprise X axis, second axial lead 144 axially comprise Y-axis to, and this relative coordinate comprises the rectangular coordinate of one X-axis-Y-axis, or be, first axial lead 124 axially comprise Y-axis to, the variation that axially comprises X axis of second axial lead 144.Wherein, to comprise between transparent lead and first, second axial lead 124,144 be to isolate with a transparent dielectric layer to first, second axial lead 124,144.In addition, the first sensing signal V
RefBe to provide, and sensing cell 220 can comprise at least one current detector or at least one electric charge detector by a sensing voltage source or a sense current source.
Above-mentioned two preferred embodiments (Fig. 3 A and Fig. 3 B) are when detecting second, third sensing signal of first, second axial lead 124,144, no matter the detection mode of its grade is to detect simultaneously or successively detect, the detection step of its grade can be second sensing signal that detects first axial lead 124 in regular turn and detects the 3rd sensing signal of second axial lead 144 in regular turn, wherein, can be that single first, second axial lead 124,144 detects one by one in proper order, can also be that many first, second axial leads 124,144 detect in the lump in proper order.In addition, the detection step of its grade also can be the 3rd sensing signal of selecting to detect second sensing signal of first axial lead 124 and selecting to detect second axial lead 144, that is its etc. the detection step be not to carry out in mode in proper order, for example: staggered detection (interlaced scanning) etc., in like manner, can be that single first, second axial lead 124,144 detects one by one, can also be that many first, second axial leads 124,144 detect in the lump.
At this, the inventor is noted that, the motion flow of the preferred embodiment in Fig. 3 C and Fig. 3 D, must arrange in pairs or groups and revise the actuating circuit of preferred embodiment shown in Fig. 2 A, that is signal loaded line 232 must only connect outer conductor 126 (shown in Fig. 2 B) or many second even outer conductor 146 (shown in Fig. 2 C) electric connections with many first, in view of the above, the first sensing signal V
RefJust can only load on first axial lead 124 or second axial lead 144 to meet the process step shown in Fig. 3 C and Fig. 3 D.
Please refer to Fig. 3 C, it is the action flow chart of another preferred embodiment of the present invention, and asks the explanation of while with reference to Fig. 2 A.In step 322, provide one first sensing signal V
RefIn many first axial leads 124, wherein these a little first axial leads 124 are electrical isolation each other.In step 324, sensing cell 220 detects a plurality of sensing signals (second sensing signal) of these a little first axial leads 124 and a plurality of sensing signals (the 3rd sensing signal) of many second axial leads 144 simultaneously, wherein these a little second axial leads 144 are also electrical isolation each other of electrical isolation and a little therewith first axial lead 124 each other, and these a little second sensing signals are that these a little first axial leads 124 receive this first sensing signal V
RefInstitute is corresponding to be produced, and these a little the 3rd sensing signals are that these a little second axial lead, 144 corresponding these a little second sensing signals produce.In step 326, sensing cell 220 changes the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact in this relative coordinate with these a little second, third sensing signals respectively.In the present embodiment, these a little the 3rd sensing signals comprise the stray capacitance value of 124,126 of first, second axial leads.
Please refer to Fig. 3 D, it is the action flow chart of two preferred embodiments more of the present invention, and asks the explanation of while with reference to Fig. 2 A.In step 332, provide one first sensing signal V
RefIn many first axial leads 124, wherein these a little first axial leads 124 are electrical isolation each other.At step 334A, sensing cell 220 detects a plurality of sensing signals (second sensing signal) of these a little first axial leads 124, and wherein these a little second sensing signals are that these a little first axial leads 124 receive the first sensing signal V
RefInstitute is corresponding to be produced.At step 336A, sensing cell 220 detects a plurality of sensing signals (the 3rd sensing signal) of many second axial leads 144, wherein these a little second axial leads 144 are also electrical isolation each other of electrical isolation and a little therewith first axial lead 124 each other, and these a little the 3rd sensing signals are that these a little second axial lead, 144 corresponding these a little second sensing signals produce.In step 338, sensing cell 220 changes the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact in this relative coordinate with these a little second, third sensing signals respectively.In the present embodiment, these a little the 3rd sensing signals comprise the stray capacitance value of 124,126 of first, second axial leads.
Referring again to Fig. 3 D, and ask the explanation of while with reference to Fig. 2 A.Step 334B is a subsequent steps 332, at step 334B, sensing cell 220 detects a plurality of sensing signals (second sensing signal) of many second axial leads 144, and wherein these a little second axial leads 144 are also electrical isolation each other of electrical isolation and a little therewith first axial lead 124 each other.At step 336B, sensing cell 220 detects a plurality of sensing signals (the 3rd sensing signal) of these a little first axial leads 124, and wherein these a little the 3rd sensing signals are that these a little first axial leads 124 receive the first sensing signal V
RefInstitute is corresponding to be produced, and these a little second sensing signals are that these a little second axial lead, 144 corresponding these a little the 3rd sensing signals produce.Be subsequent steps 338, so repeat no more thereafter.In the present embodiment, these a little second sensing signals comprise the stray capacitance value of 124,126 of first, second axial leads.
In above-mentioned three preferred embodiments (Fig. 3 C and Fig. 3 D), first axial lead 124 axially comprise X axis, second axial lead 144 axially comprise Y-axis to, and this relative coordinate comprises the rectangular coordinate of one X-axis-Y-axis, or be, first axial lead 124 axially comprise Y-axis to, the variation that axially comprises X axis of second axial lead 144.Wherein, to comprise between transparent lead and first, second axial lead 124,144 be to isolate with a transparent dielectric layer to first, second axial lead 124,144.In addition, the first sensing signal V
RefBe to provide, and sensing cell 220 can comprise at least one current detector or at least one electric charge detector by a sensing voltage source or a sense current source.
In addition, above-mentioned three preferred embodiments (Fig. 3 C and Fig. 3 D) are when detecting the sensing signal of first, second axial lead 124,144, no matter the detection mode of its grade is to detect simultaneously or successively detect, the detection step of its grade can be the sensing signal that detects first axial lead 124 in regular turn and detects the sensing signal of second axial lead 144 in regular turn, wherein, can be that single first, second axial lead 124,144 detects one by one in proper order, can also be that many first, second axial leads 124,144 detect in the lump in proper order.In addition, the detection step of its grade also can be the sensing signal of selecting to detect the sensing signal of first axial lead 124 and selecting to detect second axial lead 144, that is its etc. the detection step be not to carry out in mode in proper order, for example: staggered detection etc., in like manner, can be that single first, second axial lead 124,144 detects one by one, can also be that many first, second axial leads 124,144 detect in the lump.
The above is preferred embodiment of the present invention only, is not in order to limit claim of the present invention; All other changes for the equivalence of being finished under the disclosed spirit of disengaging or modifies, and all should be included in claim.
Claims (16)
1. projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting, this projected capacitive touch method comprises:
(a) provide one first sensing signal in many first axial leads and many second axial leads, wherein those first, second axial leads are electrical isolation each other;
(b) detect a plurality of second, third sensing signals of those first, second axial leads, wherein those second sensing signals are that those first axial leads receive this corresponding generation of first sensing signal institute, and those the 3rd sensing signals are that those second axial leads receive this first sensing signal corresponding generation; And
(c) change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with those second, third sensing signals respectively in this relative coordinate.
2. projected capacitive touch method as claimed in claim 1 is characterized in that, this step (b) comprises a certain of following variation: those second, third sensing signals that detect those first, second axial leads simultaneously; Reach those second sensing signals that detect those first axial leads earlier, detect those the 3rd sensing signals of those second axial leads again.
3. projected capacitive touch method as claimed in claim 1 is characterized in that, this step (b) can be a certain of following variation or its combination in any at least: those second, third sensing signals that detect those first, second axial leads respectively in regular turn; Select to detect those second, third sensing signals of those first, second axial leads respectively; And those second, third sensing signals that detect those first, second axial leads respectively wherein one of at least.
4. projected capacitive touch method as claimed in claim 1, it is characterized in that, those first axial leads axially comprise following may the variation: X axis and Y-axis to, those second axial leads axially comprise following may the variation: Y-axis to and X axis, and this relative coordinate comprises the rectangular coordinate of one X-axis-Y-axis.
5. projected capacitive touch method as claimed in claim 1, it is characterized in that, this first sensing signal comprises by a following device institute to be provided: a sensing voltage source and a sense current source, those second, third sensing signals comprise by a following device and are detected: a current detector and an electric charge detector.
6. projected capacitive touch method that prevents that the conductive materials influencing contactor from detecting is characterized in that this projected capacitive touch method comprises:
(a) provide one first sensing signal in many first axial leads, wherein those first axial leads are electrical isolation each other;
(b) detect a plurality of sensing signals of those first axial leads and a plurality of sensing signals of many second axial leads, wherein those second axial leads each other electrical isolation and with also electrical isolation each other of those first axial leads, those sensing signals of those first axial leads are that those first axial leads receive this corresponding generation of first sensing signal institute, and those sensing signals of those second axial leads are those sensing signals corresponding generations of corresponding those first axial leads of those second axial leads; And
(c) change the corresponding relative coordinate of at least one the greater to obtain the coordinate position of at least one contact with those sensing signals of those first, second axial leads respectively in this relative coordinate.
7. projected capacitive touch method as claimed in claim 6 is characterized in that, this step (b) comprises following may the variation: those sensing signals that detect those first, second axial leads simultaneously; Detect those sensing signals of those first axial leads earlier, detect those sensing signals of those second axial leads again; Reach those sensing signals that detect those second axial leads earlier, detect those sensing signals of those first axial leads again.
8. projected capacitive touch method as claimed in claim 6 is characterized in that, this step (b) can be following a certain or its combination in any that may change at least: those sensing signals that detect those first, second axial leads respectively in regular turn; Select to detect those sensing signals of those first, second axial leads respectively; And those sensing signals that detect those first, second axial leads respectively wherein one of at least.
9. projected capacitive touch method as claimed in claim 6, it is characterized in that, those first axial leads axially comprise following may the variation: X axis and Y-axis to, those second axial leads axially comprise following may the variation: Y-axis to and X axis, and this relative coordinate comprises the rectangular coordinate of one X-axis-Y-axis.
10. projected capacitive touch method as claimed in claim 6, it is characterized in that, this first sensing signal comprises by a following device institute to be provided: a sensing voltage source and a sense current source, those sensing signals of those first, second axial leads comprise by a following device and are detected: a current detector and an electric charge detector.
11. projected capacitive touch method as claimed in claim 6 is characterized in that, those sensing signals of those second axial leads comprise the stray capacitance value between those first axial leads and those second axial leads.
12. a projective capacitive touch-control device that prevents that the conductive materials influencing contactor from detecting is characterized in that this projective capacitive touch-control device comprises:
One first sensed layer has many first axial leads, and those first axial leads are electrical isolation and many first companies of corresponding electric connection outer conductors each other;
One second sensed layer, have many second axial leads, those second axial leads are electrical isolation and many second companies of corresponding electric connection outer conductors each other, wherein this second sensed layer is folded mutually on a dielectric layer, this dielectric layer is folded mutually on this first sensed layer, and this first sensed layer is folded mutually on a substrate;
One signal loaded line electrically connects those second company outer conductors, in order to one first sensing signal to be provided; And
One sensing cell, electrically connect those first, second connect outer conductor, in order to detect the sensing signal of those first, second axial leads.
13. projective capacitive touch-control device as claimed in claim 12, it is characterized in that, this first sensed layer, those first axial leads, this second sensed layer, those second axial leads, this dielectric layer, this substrate are transparent materials, wherein this first sensed layer also comprises a plurality of first pattern transparency electrodes and periodically is serially connected with those first axial leads, and this second sensed layer also comprises a plurality of second pattern transparency electrodes and periodically is serially connected with those second axial leads.
14. projective capacitive touch-control device as claimed in claim 12 is characterized in that, those first axial leads axially comprise following may the variation: X axis and Y-axis axially comprise following may the variation to, those second axial leads: Y-axis to and X axis.
15. projected capacitive touch method as claimed in claim 12, it is characterized in that, this signal loaded line electrically connects a gauge tap and transmits this first sensing signal to receive, it is one of following that this gauge tap comprises: an electronic switch and an electromechanical switch, wherein this signal loaded line also comprises and electrically connects those and first connect outer conductors.
16. projected capacitive touch method as claimed in claim 12, it is characterized in that, this sensing cell comprise by at least one multiplexer electrically connect those first, second connect outer conductor, this sensing cell comprises a following at least device: a current detector and an electric charge detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910004920XA CN101561736B (en) | 2008-04-15 | 2009-02-20 | Projective capacitive touch-control device for preventing conducting material from influencing contactor detection and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810089054 | 2008-04-15 | ||
| CN200810089054.4 | 2008-04-15 | ||
| CN200910004920XA CN101561736B (en) | 2008-04-15 | 2009-02-20 | Projective capacitive touch-control device for preventing conducting material from influencing contactor detection and method thereof |
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| CN101561736B CN101561736B (en) | 2011-04-20 |
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| CN102314271A (en) * | 2010-07-07 | 2012-01-11 | 宸鸿科技(厦门)有限公司 | Capacitive touch graphic structure and manufacturing method thereof, touch panel and touch display device |
| CN103226424A (en) * | 2013-04-17 | 2013-07-31 | 敦泰科技有限公司 | Capacitance type touch equipment detecting method and device, and capacitance type touch equipment |
| CN103389814A (en) * | 2012-05-08 | 2013-11-13 | 群康科技(深圳)有限公司 | Touch substrate |
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| CN103793114A (en) * | 2012-10-26 | 2014-05-14 | 周正三 | Capacitive sensing array device with high sensing sensitivity and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102314271A (en) * | 2010-07-07 | 2012-01-11 | 宸鸿科技(厦门)有限公司 | Capacitive touch graphic structure and manufacturing method thereof, touch panel and touch display device |
| CN102314271B (en) * | 2010-07-07 | 2014-11-05 | 宸鸿科技(厦门)有限公司 | Capacitive touch graphic structure and manufacturing method thereof, touch panel and touch display device |
| CN103389814A (en) * | 2012-05-08 | 2013-11-13 | 群康科技(深圳)有限公司 | Touch substrate |
| CN103389814B (en) * | 2012-05-08 | 2016-08-10 | 群康科技(深圳)有限公司 | Touch base plate |
| CN103793114A (en) * | 2012-10-26 | 2014-05-14 | 周正三 | Capacitive sensing array device with high sensing sensitivity and electronic equipment |
| CN103793114B (en) * | 2012-10-26 | 2017-03-01 | 茂丞科技股份有限公司 | There is capacitive sense array device and the electronic equipment of high sensing sensitivity |
| CN103226424A (en) * | 2013-04-17 | 2013-07-31 | 敦泰科技有限公司 | Capacitance type touch equipment detecting method and device, and capacitance type touch equipment |
| CN103645822A (en) * | 2013-12-24 | 2014-03-19 | 上海华勤通讯技术有限公司 | Foreign matter detection method for touch screen and touch screen |
| CN103645822B (en) * | 2013-12-24 | 2016-05-04 | 上海华勤通讯技术有限公司 | The foreign matter detecting method of touch-screen and touch-screen |
| CN105242812A (en) * | 2015-11-25 | 2016-01-13 | 联想(北京)有限公司 | Touch screen and touch sensing method |
| CN105242812B (en) * | 2015-11-25 | 2019-02-05 | 联想(北京)有限公司 | Touch screen and touch-sensing method |
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| CN101561736B (en) | 2011-04-20 |
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