CN102902432B - Touch detecting method and contactor control device - Google Patents
Touch detecting method and contactor control device Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
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Abstract
The present invention proposes a kind of touch detecting method and contactor control device.The method comprises: by the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to carry out first time charging; By a ground connection in the first electrode and the second electrode, to carry out first time electric discharge; Carry out detecting to obtain the first change detected value between first time charging and first time electric discharge from the first electrode of correspondence or the second electrode; By the first electrode ground connection and to the second electrode applying high level signal to carry out second time charging; High level signal is applied to carry out third time charging to the first electrode and the second electrode; Carry out detecting to obtain the second change detected value between second time charging and third time charging from the first electrode of correspondence or the second electrode; According to the first change detected value and the second change detected value calculated touch location.
Description
Technical field
The present invention relates to electronic device design and manufacturing technology field, particularly a kind of touch detecting method and contactor control device.
Background technology
The range of application of current touch-screen is from ATM (automatic teller machine) in the past, minority's business markets such as industrial computer, expand to mobile phone rapidly, PDA (personal digital assistant), GPS (GPS), PMP (MP3, MP4 etc.), even the mass consumption electronic applications such as panel computer.Have for touch-screen that touch control operation is simple, convenient, the advantage of hommization, therefore touch-screen is expected to become the best interface of human-computer interaction and is widely applied in a portable device rapidly.
Capacitance touch screen is divided into self-capacitance and mutual capacitance two class usually.As shown in Figure 1, be the structural drawing of a kind of self-capacitance touch screen common in prior art.This self-capacitance touch screen mainly contains double-deck diamond structure sensing unit 100 ' and 200 ', its Cleaning Principle scans respectively X-axis and Y-axis, if detect that the capacitance variations of certain point of crossing is beyond preset range, then by the point of crossing of this row and column as touch coordinate.Although the linearity of this self-capacitance touch screen is better, often there's something fishy, and point occurs, is difficult to realize multiple point touching.In addition, owing to adopting bilayer screen, structure and cost also can be caused significantly to increase, and diamond structure there will be coordinate drift when capacitance change is very little, affects greatly by external interference.
As shown in Figure 2 a, be the structural drawing of another kind of self-capacitance touch screen common in prior art.This self-capacitance touch screen adopts triangular pattern screen structure.This self-capacitance touch screen comprises substrate 300 ', be arranged on multiple electrodes 500 ' that the multiple triangle sensing unit 400 ' on substrate 300 ' is connected with each triangle sensing unit 400 '.As shown in Figure 2 b, be the Cleaning Principle of triangle self-capacitance touch screen.As shown in the figure, ellipse representation is pointed, and S1, S2 represent the contact area of finger and two triangle sensing units.False coordinate initial point is in the lower left corner, then horizontal ordinate X=S2/ (S1+S2) * P, wherein, P is resolution.When finger moves right, because S2 is not linear increase, so there is a deviation in X-coordinate.As can be seen from above-mentioned principle, current triangle sensing unit is single-ended detection, namely only from an angle detecting, is then calculated the coordinate of both direction by algorithm.Although this self-capacitance touch screen structure is more simple, the capacitive sensing not for screen is optimized, and capacitance change is little, thus causes signal to noise ratio (S/N ratio) inadequate.In addition, because this sensing unit is triangle, when pointing transverse shifting, area is not linear increase, and therefore the linearity is poor, and result in coordinate calculating and offset, the linearity is good not.
In addition, this capacitive sensing unit output capacitance variable quantity is very little, and reach flying method level, the existence of its cable stray capacitance, has higher requirement to metering circuit.And stray capacitance can change with many factors such as temperature, position, inner electric field and outer electric field distributions, measured capacitance signal is even flooded in interference.In addition, for individual layer electric capacity, because the impact of Vcom level signal can form serious interference to inductance capacitance, wherein, Vcom level signal is to prevent lcd screen liquid crystal aging from not stopping the level signal overturn.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency, particularly solves or avoid the above-mentioned shortcoming occurred in existing self-capacitance touch screen.
Embodiment of the present invention first aspect proposes a kind of touch detecting method of touch-screen, described touch-screen comprises multiple disjoint sensing unit, the two ends of each sensing unit have the first electrode and the second electrode respectively, said method comprising the steps of: by the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to carry out first time charging when a described sensing unit is touched to the self-capacitance of described sensing unit generation; By at least one ground connection in the first electrode of a described sensing unit and the second electrode, to carry out first time electric discharge to described self-capacitance; Carry out detecting to obtain the first change detected value between the charging of described first time and the electric discharge of described first time from described first electrode of correspondence or the second electrode; By the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to carry out second time charging to described self-capacitance; To the first electrode and the second electrode applying high level signal of a described sensing unit, or, apply high level signal in described first electrode and described second electrode and another in described first electrode and described second electrode is disconnected, to carry out third time charging to described self-capacitance; Carry out detecting to obtain the second change detected value between the charging of described second time and the charging of described third time from described first electrode of correspondence or the second electrode; First resistance of described self-capacitance extremely between described first electrode and the proportionate relationship of second resistance of described self-capacitance extremely between described second electrode is calculated according to described first change detected value and the second change detected value; And according to the proportionate relationship determination touch location between described first resistance and described second resistance.
It is noted that the order intermodulation of the process of the process of above-mentioned first time charging and first time being discharged and second and third charging, the present invention can be realized equally, as long as cause the charge variation of self-capacitance.Such as, second time charging is different to the charging voltage of self-capacitance with third time charging, and therefore can cause the charge variation of self-capacitance, the present invention can obtain the proportionate relationship of corresponding first resistance and the second resistance according to the charge variation of self-capacitance.
Embodiment of the present invention second aspect also proposed a kind of contactor control device, comprising: substrate, multiple disjoint sensing unit, described multiple sensing unit is formed on described substrate, and the two ends of each sensing unit have the first electrode and the second electrode respectively, touch-screen control chip, described touch-screen control chip comprises charging module, discharge module and detection module, wherein, described charging module, for in first time charging process, the first electrode ground connection of a sensing unit in described multiple sensing unit is applied high level signal to charge to the self-capacitance that a described sensing unit produces when a described sensing unit is touched to the second electrode, in second time charging process, by the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to charge to described self-capacitance, and in third time charging process, to the first electrode and the second electrode applying high level signal of a described sensing unit, or, apply high level signal in described first electrode and described second electrode and another in described first electrode and described second electrode is disconnected, to carry out third time charging to described self-capacitance, described discharge module, for after described charging module is to the first time charging of described self-capacitance, by at least one ground connection in the first electrode of a described sensing unit and the second electrode, to discharge to described self-capacitance, and detection module, detect to obtain the first change detected value between the charging of described first time and the electric discharge of described first time for carrying out from described first electrode of correspondence or the second electrode, and carry out detecting to obtain the second change detected value between the charging of described second time and the charging of described third time from described first electrode of correspondence or the second electrode, and control and computing module, for to described charging module, discharge module, detection module controls, and calculate described self-capacitance to the first resistance between described first electrode and the proportionate relationship between the second resistance between described self-capacitance to described second electrode according to the first change detected value and the second change detected value, and according to the proportionate relationship determination touch location between described first resistance and described second resistance.
The embodiment of the present invention third aspect also proposed a kind of portable electric appts, comprises contactor control device as above.
Sensing unit in the Touch-screen testing equipment of the embodiment of the present invention adopts double-end monitor, namely the two ends of sensing unit all have electrode, and each electrode is all connected with the corresponding pin of touch-screen control chip, the location to touch point can be realized when carrying out touching detection by sensing unit self.
What is more important, the present invention realizes the determination of touch location by ratio between calculating first resistance and the second resistance, therefore relative to current rhombus or triangular design, due to when determining touch location, without the need to calculating the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, thus improve measuring accuracy, improve the linearity.
The embodiment of the present invention is by applying level signal to the electrode at sensing unit two ends, if this sensing unit is touched, touching object (such as pointing) then can form self-capacitance with this sensing unit, therefore the present invention can be charged to this self-capacitance by the level signal applied, and according to the touch location on the proportionate relationship determination touch-screen between the first resistance and the second resistance.And by the detection mode of self-capacitance being carried out to twice charging of the embodiment of the present invention, to offset some immeasurablel physical parameter or to reduce the measurement of physical quantity, thus under the prerequisite ensureing detection speed, effectively improve accuracy of detection.
The embodiment of the present invention proposes a kind of self-capacitance detection mode of novelty, when sensing unit is touched, this sensing unit just can be divided into two resistance by touch point, thus while carrying out self-capacitance detection, consider that these two resistance just can determine the position of touch point on this sensing unit.The structure of the embodiment of the present invention is simple, and for a sensing unit, detects when charge or discharge, can not only reduce RC constant, save time and raise the efficiency, and can ensure that coordinate can not offset.In addition, the embodiment of the present invention effectively can also improve the to-noise ratio of circuit, reduces circuit noise, improves the induction linearity.In addition, owing to charging to the sensing unit be touched in testing process, therefore wherein small area analysis can be produced, the impact of Vcom level signal on the self-capacitance that sensing unit in touch-screen produces can be eliminated well, therefore can correspondingly eliminate screenmask layer and concerned process steps, thus can reduce costs further while enhancing antijamming capability.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the structural drawing of a kind of self-capacitance touch screen common in prior art;
Fig. 2 a is the structural drawing of another kind of self-capacitance touch screen common in prior art;
Fig. 2 b is the Cleaning Principle figure of another kind of self-capacitance touch screen common in prior art;
Fig. 3 is the Cleaning Principle schematic diagram of embodiment of the present invention contactor control device;
Fig. 4 is the touch detecting method process flow diagram of the embodiment of the present invention;
Fig. 5 is the schematic diagram that the rectangle sensing unit of the embodiment of the present invention is touched;
Fig. 6 a is the sensing unit structural drawing of one embodiment of the invention;
Fig. 6 b is the sensing unit structural drawing of one embodiment of the invention;
Fig. 7 a is another embodiment of the present invention Touch-screen testing equipment structural drawing;
Fig. 7 b is another embodiment of the present invention touch screen detection device structural drawing;
Fig. 8 is the schematic diagram of the sensing unit of embodiment of the present invention when being touched;
Fig. 9 a is another embodiment Touch-screen testing equipment structural drawing of the present invention;
Fig. 9 b is another embodiment touch screen detection device structural drawing of the present invention;
Figure 10 is the schematic diagram of the sensing unit of embodiment of the present invention when being touched;
Figure 11 is the contactor control device schematic diagram of one embodiment of the invention;
Figure 12 is the structural drawing of embodiment of the present invention touch-screen control chip.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
The embodiment of the present invention proposes a kind of self-capacitance detection mode of novelty, when sensing unit is touched, this sensing unit can be divided into two resistance by touch point, considers that these two resistance just can determine the position of touch point on this sensing unit while carrying out self-capacitance detection.As shown in Figure 3, be the Cleaning Principle schematic diagram of embodiment of the present invention contactor control device.When this sensing unit of finger touch, this sensing unit will be equivalent to be divided into two resistance, and the resistance of these two resistance is relevant to the position of touch point.Such as, as described in Figure, when touch point and the first electrode nearer time, then resistance R1 is just less, and resistance R2 is just larger; Otherwise, when touch point and the second electrode nearer time, then resistance R1 is just comparatively large, and resistance R2 is just less.Therefore, the present invention is by just determining the position of touch point on this sensing unit to the detection of resistance R1 and R2.In an embodiment of the present invention, detect resistance R1 and R2 in several ways, one or more such as by detecting in the current detecting changing value of the first electrode and the second electrode, self-capacitance change detected value, level signal change detected value and charge variation amount, thus obtain resistance R1 and R2 according to these change detected values.And the present invention, by carrying out twice charging to the self-capacitance formed by touch point to offset the measurement of some immeasurablel physical parameter or minimizing physical quantity, improves measuring accuracy.
It should be noted that, in an embodiment of the present invention, above-mentioned first electrode is identical with the function of the second electrode, and the two can exchange, therefore in the above-described embodiments, both also from the second electrode detection, electric current can be needed through the first resistance and this requirement of the second resistance as long as can meet when charging, discharging or detecting from the first electrode detection.
In an embodiment of the present invention, corresponding voltage can being applied to multiple sensing unit successively in the mode of scanning, also can detect successively in the mode of scanning when detecting simultaneously.
As shown in Figure 4, be the touch detecting method process flow diagram of the embodiment of the present invention, this schematic diagram shown in process flow diagram composition graphs 3 is together described.The method comprises the following steps:
Step S401, by the first electrode ground connection of the sensing unit of in multiple sensing unit and to the second electrode applying high level signal to carry out first time charging when a sensing unit is touched to the self-capacitance of a sensing unit generation.In this embodiment, high level signal Vcc is applied to the second electrode.
If now this sensing unit is pointed or other objects touch, then this sensing unit will produce self-capacitance C1 (with reference to Fig. 3), therefore the high level signal Vcc by applying just can charge to self-capacitance, and the voltage be now applied on self-capacitance is V1=VccR1/ (R1+R2).In addition, in an embodiment of the present invention, by the charging to self-capacitance, the accuracy of detection of self-capacitance can also be improved.
In one embodiment of the invention, if this sensing unit is not touched, then the follow-up existence that self-capacitance cannot be detected, therefore can judge that it is not touched.In an embodiment of the present invention, corresponding voltage can being applied to multiple sensing unit successively in the mode of scanning, also can detect successively in the mode of scanning when detecting simultaneously.
Step S402, by least one ground connection in the first electrode of a sensing unit and the second electrode.Particularly, such as, by the first electrode of a sensing unit and the equal ground connection of the second electrode, or by the first electrode ground connection, the second electrode disconnects, or by the second electrode ground connection, the first electrode disconnects, to carry out first time electric discharge to self-capacitance.
Step S403, carries out detecting to obtain the first change detected value between first time charging and first time electric discharge from the first electrode of correspondence or the second electrode.In an embodiment of the present invention, described correspondence refers to following situation, such as, when the first electrode of a sensing unit and the equal ground connection of the second electrode being discharged, all can detect from the first electrode and the second electrode; As worked as the first electrode ground connection, when the second electrode disconnects, then can only from the first electrode detection; Otherwise, when the second electrode ground connection, when the first electrode disconnects, then can only from the second electrode detection.
In the present embodiment, suppose that the first change detected value is Δ Q1.Below for the first change detected value and the second change detected value for charge variation amount is described, but can other change detected values of relation between reaction resistance R1 and R2, such as level signal, electric current etc. also all can adopt.
Wherein, Δ Q1=V1C1=VccC1R1/ (R1+R2) (1)
Wherein, V1=VccR1/ (R1+R2), now during first time charging, the voltage of self-capacitance is V1, and this self-capacitance voltage can detect when first time electric discharge and obtain.
Step S404, by the first electrode ground connection of the sensing unit of in multiple sensing unit and to the second electrode applying high level signal to carry out second time charging to self-capacitance.In this embodiment, high level signal Vcc is applied to the second electrode, just can be charged to self-capacitance by the high level signal Vcc applied, the voltage be now applied on self-capacitance is V1=VccR1/ (R1+R2), and the quantity of electric charge therefore on self-capacitance is V1C1=VccC1R1/ (R1+R2).
Step S405, to the first electrode and the second electrode applying high level signal of a sensing unit, or, apply high level signal in described first electrode and described second electrode and another in described first electrode and described second electrode is disconnected, to carry out third time charging to self-capacitance.
In embodiments of the present invention, all high level signal can be applied to the first electrode and the second electrode; Or, apply high level signal to the first electrode, and the second electrode disconnects; Or, the second electrode is applied high level signal, and the first electrode disconnects.In addition it is noted that due to the high level signal applied be known quantity, therefore the high level signal applied for twice can be identical or not identical, all do not affect derivation.In this embodiment, the high level signal Vcc identical with step S401 and step S404 is applied to the first electrode and/or the second electrode.The voltage be now applied on self-capacitance is Vcc.
Step S406, carries out detecting to obtain the second change detected value between second time charging and third time charging from the first electrode of correspondence or the second electrode.In the present embodiment, suppose that the second change detected value is Δ Q2.Second change detected value need adopt and be worth identical change detected value with the first change detected in step S403, is namely charge variation amount in embodiments of the present invention.Similarly, said " corresponding " be also relative concept, such as, when third time charges, if the second electrode disconnects, then can only detect from the first electrode.
In an embodiment of the present invention, as long as the mode of third time charging is different from the mode that second time is charged, the change of the quantity of electric charge in self-capacitance can just be caused.The voltage be now applied on self-capacitance is Vcc, due to Vcc=V1+V2, therefore, now just can calculate the difference between Vcc and V1 by the second change detected value (such as charge variation value) between charging for the third time and second time charging, thus calculate acquisition voltage V2.
Wherein, Δ Q2=VccC1-V1C1=V2C1 (2)
Step S407, the proportionate relationship of the second resistance between the first resistance between self-capacitance to the first electrode and self-capacitance to the second electrode is calculated according to the first change detected value and the second change detected value, and according to the proportionate relationship determination touch location of the first resistance and the second resistance.In one embodiment of the invention, through type (1) and the self-capacitance charge variation amount represented by (2) can calculate the proportionate relationship of R1 and R2, due to the regular linear relation of figure, then can calculate the position of the horizontal ordinate at place, touch point, and the position at self-capacitance C1 place.
In an embodiment of the present invention, R1/R2=V1/V2=Δ Q1/ Δ Q2, therefore just can obtain the proportionate relationship between R1 and R2 by the embodiment of the present invention.
In an embodiment of the present invention, if sensing unit is door shape sensing unit or L shape sensing unit, then by the touch location that the ratio between the first resistance and the second resistance just can be determined on the touchscreen, describe in detail below with reference to concrete example.But in other embodiments of the invention, if sensing unit is rectangle sensing unit or snakelike (but see on the whole be equivalent to rectangle) sensing unit, then step S407 can only calculate the touch location on touch-screen first direction, and this first direction can be the length direction (horizontal direction of such as touch-screen) of sensing unit.
If sensing unit is rectangle sensing unit or snakelike (but see on the whole be equivalent to rectangle) sensing unit, then also need the touch location determining in a second direction according to the position of sensing unit.In one embodiment of the invention, first direction is the length direction of sensing unit, and second direction is the direction perpendicular to sensing unit, and sensing unit is horizontally disposed with or vertically arranges.
Be pointed out that; the order of above-mentioned first time charge and discharge process (step S401-step S403) and second and third charging process (step S404-step S406) can intermodulation; namely first step S404-step S406 is carried out; carry out step S401-step S403 again; do not depart from thought of the present invention too, be included within protection scope of the present invention.
In an embodiment of the present invention, self-capacitance detection module can be self-capacitance detection module known at present, does not therefore repeat them here.
In one embodiment of the invention, if adopt two self-capacitance detection modules, then because two self-capacitance detection modules can share multiple device, the overall power of chip can not therefore be increased.
In one embodiment of the invention, sensing unit can take different shapes.Preferably, multiple disjoint sensing unit is positioned at same layer, thus when ensureing accuracy of detection, greatly can save cost.
As shown in Figure 5, be schematic diagram that the rectangle sensing unit of the embodiment of the present invention is touched.This sensing unit is rectangle, and the first direction of multiple sensing unit and described touch-screen is parallel to each other, and therefore touch location is touch location in a first direction.
As shown in Figure 6 a, be the sensing unit structural drawing of one embodiment of the invention.This sensing unit 200 comprises multiple Part I 230 and multiple parallel Part II 240, wherein, be connected by Part II 240 between adjacent Part I 230, to form multiple the first groove 1000 and the second groove 2000 be alternately arranged, wherein, the opening direction of multiple first groove 1000 and multiple second groove 2000 is contrary.Preferably, Part II 240 arranges along first direction.In one embodiment of the invention, multiple Part I 230 can be parallel to each other, also can be not parallel.And preferably, Part II 240 is rectangle.In other embodiments of the invention, Part I 230 also can be rectangle, but Part I 230 also can be other various shape.In this embodiment, increased the impedance of resistance by Part I 230, thus increase the impedance of sensing unit 200, the first resistance and the second resistance are more easily detected, improves accuracy of detection further.And in this embodiment, preferably, the interval between Part II 240 is equal, thus can improve equably from the impedance of sensing unit, to improve accuracy of detection.In one embodiment of the invention, first direction is the length direction of sensing unit 200, and second direction is the direction perpendicular to sensing unit 200, and particularly, sensing unit 200 can be horizontally disposed with or vertically arrange.
In an embodiment of the present invention, the size of sensing unit 200 length direction and the size of substrate basically identical, therefore touch control device structure is simple, easily manufactures, and low cost of manufacture.
In one embodiment of the invention, the first electrode 210 and the second electrode 220 are connected with two Part I in multiple Part I 230 respectively.But in another embodiment of the present invention, the first electrode 210 and the second electrode 220 are connected with two Part II in multiple Part II 240 respectively, as shown in Figure 6 b.
Further, in an embodiment of the present invention, mutually vertical between Part II 240 and Part I 230, angle is therebetween preferably 90 degree, certainly also can select other angles.As shown in Figure 6 a, multiple Part I 230 is joined end to end by multiple Part II 240 by this sensing unit 200, and the first electrode 210 of sensing unit 200 is connected with the Part I 230 at two ends respectively with the second electrode 220.From one-piece construction, this sensing unit 200 is for having the rectangle compared with aspect ratio.This it should be noted that, although arranged along X-axis by sensing unit 200 in Fig. 6 a, it will be understood by those skilled in the art that this sensing unit 200 also can be arranged along Y-axis.Effectively can reduce noise by the structure of this sensing unit, improve the linearity of induction.
As shown in Figure 7a, be the sensing unit structural drawing of another embodiment of the present invention.In this embodiment, this sensing unit 200 can be a shape, and in multiple sensing unit 200, the length of each sensing unit 200 is different, mutually nested between multiple sensing unit 200.Wherein, each described sensing unit comprises Part III 250, disjoint Part IV 260 and Part V 270.Preferably, Part III 250 is parallel with the first limit 110 of substrate 100, Part IV 260 is parallel with the Second Edge 120 of substrate 100 with Part V 270, and Part IV 260 one end is connected with one end of Part III 250, and one end of Part V 270 is connected with the other end of Part III 250.The other end of the Part IV 260 of sensing unit 200 has the first electrode 210, and the other end of Part V 270 has the second electrode 220, and wherein, each first electrode 210 is all connected with the corresponding pin of touch-screen control chip with the second electrode 220.
In an embodiment of the present invention, the so-called mutually nested sensing unit that the sensing unit in outside partly surrounds inner side that refers to, such as shown in Figure 7a, can reach larger coverage rate like this while guarantee precision, and reduce the complexity of computing, improve the response speed of touch-screen.The mode that certain those skilled in the art also can adopt other mutually nested according to the thought of Fig. 7 a arranges sensing unit.In one embodiment of the invention, the Part III 250 of each sensing unit 200 is parallel with the Part III 250 of other sensing units 200, the Part IV 260 of each sensing unit 200 is parallel with the Part IV 260 of other sensing units 200, and the Part V 270 of each sensing unit 200 is parallel with the Part V 270 of other sensing units 200.In one embodiment of the invention, in the Part III 250 of sensing unit 200, Part IV 260 and Part V 270, at least one is rectangle, and preferably, Part III 250, Part IV 260 and Part V 270 are rectangle.In this embodiment, due to rectangular configuration figure rule, therefore when pointing lateral or longitudinal movement, the linearity is good, and in addition, the spacing between two rectangular configuration is identical, is convenient to calculate, thus improves computing velocity.
In one embodiment of the invention, the Part IV 260 of each sensing unit 200 is equal with Part V 270 length.
In one embodiment of the invention, substrate 100 is rectangle, mutually vertical between the first limit 110 and Second Edge 120, and mutually vertical between Part IV 260 and Part III 250, mutually vertical between Part V 270 and Part III 250.
In one embodiment of the invention, spacing between the Part III 250 of adjacent two sensing units 200 is equal, spacing between the Part IV 260 of adjacent two sensing units 200 is equal, and the spacing between the Part V 270 of adjacent two sensing units 200 is equal.So just evenly can be divided by the first limit 110 of multiple sensing units 200 pairs of touch-screens and Second Edge 120, thus improve arithmetic speed.Certainly in other embodiments of the invention, the spacing between the Part III 250 of adjacent two sensing units 200 also can be unequal, or the spacing between the Part IV 260 of adjacent two sensing units 200 also can be unequal, as shown in Figure 7b.Such as, because user often touches the centre of touch-screen, therefore the spacing between the sensing unit at touch screen center position can be reduced, thus improve the accuracy of detection in centre.
In one embodiment of the invention, multiple sensing unit 200 is symmetrical relative to the central shaft Y of substrate 100, and as shown in Figure 7a, central shaft Y perpendicular to Part III 250, thus is more conducive to improving precision.
As shown in Figure 7a, in this embodiment, the first electrode 210 of sensing unit 200 and the second electrode 220 are all positioned on the first limit 110 of substrate 100.In this embodiment, after the touch location on sensing unit being detected, the touch location on touch-screen can be obtained.
It should be noted that, above-mentioned Fig. 7 a is the present invention's preferably embodiment, and it can obtain larger coverage rate, but other embodiments of the present invention can carry out some equivalent changes to Fig. 7 a, and such as Part IV 260 and Part V 270 can be uneven.
Sensing unit in the embodiment of the present invention adopts the structure of similar door shape, and not only structure is simple, is convenient to make, and institute is leaded, and all same, design is convenient, reduces silver and starches cost and make easily, have very great help to minimizing production cost.
As shown in Figure 8, be the schematic diagram when sensing unit of the embodiment of the present invention is touched.As can be seen from Figure 8, first electrode is 210, second electrode is 220, touch location is close to the second electrode, suppose that the length of sensing unit is 10 unit lengths, and sensing unit is divided into 10 parts equably, wherein, the length of sensing unit Part III 250 is 4 unit lengths, and the length of sensing unit Part IV 260 and Part V 270 is 3 unit lengths.Through detecting, know that the ratio of the first resistance and the second resistance is 4: 1, namely the length (being embodied by the first resistance) of the first electrode 210 to touch location is 80% of whole sensing unit length.In other words, touch point is positioned at the position of distance the first 8 unit lengths in electrode 210 place, knows, touch point is positioned at the position of distance the second 2 unit lengths in electrode 220 place.When pointing mobile, touch location can corresponding movement, therefore just can judge to point corresponding motion track by the conversion of touch location, thus judge the input instruction of user.
As can be seen from the above example of Fig. 8, account form of the present invention is very simple, therefore, it is possible to greatly improve the reaction velocity of touch-screen detection.In an embodiment of the present invention, usual finger or other objects can touch multiple sensing unit, now first can obtain touch location each in the multiple sensing units be touched at this, the mode then by being averaging calculates final touch location on the touchscreen.
As illustrated in fig. 9, be another embodiment Touch-screen testing equipment structural drawing of the present invention.In one embodiment of the invention, the length of multiple sensing unit increases gradually, and each described sensing unit comprises Part VI 280 and Part VII 290.One end of Part VI 280 has the first electrode 210, and one end of Part VII 290 is connected with the other end of Part VI 280, and the other end of Part VII 290 has the second electrode 220.
Particularly, Part VI 280 is parallel with the first limit 110 of substrate 100, and Part VII 290 is parallel with the Second Edge 120 of substrate 100, and the first limit 110 is adjacent with Second Edge 120.And each first electrode 210 is all connected with the corresponding pin of touch-screen control chip with the second electrode 220.
In a preferred embodiment of the invention, the Part VI 280 of each sensing unit 200 is parallel with the Part VI 280 of other sensing units 200, and the Part VII 290 of each sensing unit 200 is parallel with the Part VII 290 of other sensing units 200.The coverage rate of sensing unit to touch-screen effectively can be improved by such setting.In one embodiment of the invention, in the Part VI 280 of sensing unit 200, Part VII 290, at least one is rectangle, and preferably, Part VI 280, Part VII 290 are rectangle.In this embodiment, due to rectangular configuration figure rule, therefore when pointing lateral or longitudinal movement, the linearity is good, and in addition, the spacing between two rectangular configuration is identical, is convenient to calculate.
Sensing unit in the touch screen detection device of the embodiment of the present invention adopts double-end monitor, namely the two ends of sensing unit all have electrode, and each electrode is all connected with the corresponding pin of touch-screen control chip, the location to touch point can be realized when carrying out touching detection by sensing unit self.
What is more important, the present invention realizes the determination of touch location by ratio between calculating first resistance and the second resistance, therefore relative to current rhombus or triangular design, due to when determining touch location, without the need to calculating the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, reduces the dependence of self-capacitance accuracy of detection, thus improve measuring accuracy, improve the linearity.In addition, because in the Part V 270 of the embodiment of the present invention, Part VI 280 and Part VII 290, any one all can be the rectangle of regular shape, therefore relative to irregular shapes such as current rhombus or triangles, also the linearity can be improved further.
In one embodiment of the invention, the Part VI 280 of each sensing unit is equal with Part VII 290 length, thus can improve arithmetic speed.Preferably, substrate 100 is rectangle, mutually vertical between the first limit 110 and Second Edge 120.First limit 110 is mutually vertical with Second Edge 120, sensing unit is not only made to design more regular, such as make between the Part VI 280 of sensing unit and Part VII 290 also mutually vertical, thus the coverage rate improved touch-screen, and between Part VI 280 and Part VII 290, mutually vertically also can improve the linearity of detection.
In one embodiment of the invention, the spacing between adjacent two sensing units 200 is equal.So just evenly can be divided by the first limit 110 of multiple sensing units 200 pairs of touch-screens and Second Edge 120, thus improve arithmetic speed.
Certainly in another embodiment of the present invention, spacing between adjacent two sensing units 200 also can not wait, as shown in figure 9b, such as because user often touches the centre of touch-screen, therefore the spacing between the sensing unit at touch screen center position can be reduced, thus improve the accuracy of detection in centre.
As illustrated in fig. 9, in this embodiment, the first electrode 210 of sensing unit 200 is positioned on the first limit 110 of substrate 100, and the second electrode 220 is positioned on the Second Edge 120 of substrate 100, and the first limit 110 is mutually vertical with Second Edge 120.In this embodiment, after the touch location on sensing unit being detected, the touch location on touch-screen can be obtained.
As shown in Figure 10, be the schematic diagram when sensing unit of the embodiment of the present invention is touched.As can be seen from Figure 10, first electrode is 210, second electrode is 220, touch location is close to the second electrode 220, suppose that the length of sensing unit is 10 unit lengths, and sensing unit is divided into 10 parts equably, wherein, the length of the Part VI 280 of sensing unit is 5 unit lengths, and the length of the Part VII 290 of sensing unit is 5 unit lengths.Through detecting, know that the ratio of the first resistance and the second resistance is 9: 1, namely the length (being embodied by the first resistance) of the first electrode 210 to touch location is 90% of whole sensing unit length.In other words, touch point is positioned at the position of distance the first 9 unit lengths in electrode 210 place, knows, touch point is positioned at the position of distance the second 1 unit length in electrode 220 place.
As can be seen from the above example of Figure 10, account form of the present invention is very simple, therefore, it is possible to greatly improve the reaction velocity of touch-screen detection.
In one embodiment of the invention, multiple sensing unit 200 is positioned at same layer, therefore only needs one deck ITO, thus while guarantee precision, greatly reduces manufacturing cost.
Sensing unit in the touch screen detection device of the embodiment of the present invention adopts double-end monitor, namely the two ends of sensing unit all have electrode, and each electrode is all connected with the corresponding pin of touch-screen control chip, the location to touch point can be realized when carrying out touching detection by sensing unit self.
What is more important, the present invention realizes the determination of touch location by ratio between calculating first resistance and the second resistance, therefore relative to current rhombus or triangular design, due to when determining touch location, without the need to calculating the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, reduces the dependence of self-capacitance accuracy of detection, thus improve measuring accuracy, improve the linearity.In addition, because in the Part V 270 of the embodiment of the present invention, Part VI 280 and Part VII 290, any one all can be the rectangle of regular shape, therefore relative to irregular shapes such as current rhombus or triangles, also the linearity can be improved further.
In sum, the embodiment of the present invention is by applying level signal to the electrode at sensing unit two ends, if this sensing unit is touched, then can form self-capacitance by this sensing unit, therefore the present invention can be charged to this self-capacitance by the level signal applied, and according to the touch location that the proportionate relationship between the first resistance and the second resistance is determined in a first direction.Such as in one embodiment of the invention, proportionate relationship between first resistance and the second resistance, according to when to described self-capacitance charge/discharge, is carried out detecting from described first electrode and/or the second electrode the proportionate relationship between the first detected value and the second detected value obtained and is calculated.Therefore from the first detected value produced when the first electrode and/or this self-capacitance charge/discharge of the second electrode detection and the second detected value.Like this, just can react by the first detected value and the second detected value the position that touch point is positioned at this sensing unit, thus determine the position of touch point at touch-screen further.
For the sensing unit of Fig. 5 and Fig. 6, after determining the touch location on first direction, touch location is in a second direction determined in the position of the sensing unit also needing basis to be further touched.In an embodiment of the present invention, can refer to shown in Fig. 5 and 6, if detect that the first detected value of certain sensing unit or the second detected value are greater than predetermined threshold value, then illustrate that this sensing unit is touched.Suppose that second sensing unit (its ordinate is M) is touched, then touch location is in a second direction just the coordinate M of second sensing unit.Afterwards, then according to the touch location on first direction and the touch location in second direction position on the touchscreen, touch point is determined.
Particularly, centroid algorithm can be adopted to calculate touch point touch location in a second direction, below centroid algorithm is simply introduced.
In draw runner and touch pad application, be often necessary the position determining finger (or other capacitive object) more than the essential spacing of concrete sensing unit.The touch panel of finger on draw runner or touch pad is greater than any sensing unit usually.In order to adopt a center to calculate the position after touch, scan to verify that given sensing station is effective to this array, the requirement for the adjacent sensing unit signal of some is greater than default touch threshold.After finding signal the strongest, this signal and those closing signals being greater than touch threshold are all for computing center:
Wherein, locate the label of sensing unit centered by Ncent, n is the number sensing unit be touched being detected, and i is the sequence number of sensing unit of being touched, and wherein i is more than or equal to 2.
Such as, when finger touch is at Article 1 passage, its capacitance change is y1, and the capacitance change on Article 2 passage is the capacitance change on y2 and Article 3 passage when being y3.Wherein second channel y2 capacitance change is maximum.Y-coordinate just can at last:
As shown in figure 11, be the contactor control device schematic diagram of one embodiment of the invention.This contactor control device comprises the touch screen detection device, the touch-screen control chip 300 that are made up of substrate 100 and multiple disjoint sensing unit 200.Wherein, a part of pin in touch-screen control chip 300 is connected with the first electrode 210 of multiple sensing unit 200, another part pin in touch-screen control chip 300 is connected with the second electrode 220 of multiple sensing unit 200, and touch-screen control chip 300 applies level signal to the first electrode 210 of multiple sensing unit 200 and/or the second electrode 220, this level signal when sensing unit 200 is touched to the self-capacitance charging that sensing unit 200 produces.
As shown in figure 12, be the structural drawing of embodiment of the present invention touch-screen control chip.Touch-screen control chip 300 comprises charging module 310, discharge module 320, detection module 330 and controls and computing module 340.First electrode 210 ground connection of the sensing unit of in multiple sensing unit 200 in the first time charging process, is applied high level signal to charge to the self-capacitance that a sensing unit 200 produces when a sensing unit 200 is touched to the second electrode 220 by charging module 310; In second time charging process, by the first electrode 210 ground connection of the sensing unit of in multiple sensing unit 200 and to the second electrode 220 apply high level signal with when a sensing unit 200 is touched to charge to self-capacitance; And in third time charging process, high level signal is applied to the first electrode 210 of a sensing unit 200 and the second electrode 220, or, apply high level signal in the first electrode 210 and the second electrode 220 and another in the first electrode 210 and the second electrode 220 is disconnected, to carry out third time charging to self-capacitance.At least one ground connection in first electrode of sensing unit 200 and the second electrode, after the first time charging of charging module 310 pairs of self-capacitances, is discharged to carry out first time to self-capacitance by discharge module 320.Detection module 330, for when each discharge and recharge, carries out detecting to obtain the first change detected value between first time charging and first time electric discharge and the second change detected value between second time charging and third time charging from the first electrode 210 of correspondence or the second electrode 220.
Control and computing module 340 are for controlling charging module 310, discharge module 320, detection module 330, and calculate the proportionate relationship of the second resistance between the first resistance between self-capacitance to the first electrode and self-capacitance to described second electrode according to the first change detected value and the second change detected value, and according to the proportionate relationship determination touch location of the first resistance and the second resistance.
In an embodiment of the present invention, usual finger or other objects can touch multiple sensing unit, now control and computing module 340 first can obtain touch location each in the multiple sensing units be touched at this, and the mode then by being averaging calculates final touch location on the touchscreen.In an embodiment of the present invention, control and computing module 340 can control charging module 310 in the mode of scanning and apply corresponding voltage to multiple sensing unit successively, also can detect successively in the mode of scanning when detecting simultaneously, or the mode controlled discharge module 320 that also can scan is discharged to the self-capacitance that the sensing unit be touched in multiple sensing unit produces successively.
In one embodiment of the invention, the first change detected value, the second change detected value can be one or more in current detecting changing value, self-capacitance change detected value, level signal change detected value and charge variation amount.
In one embodiment of the invention, detection module 330 is CTS (capacitive detection module).
In one embodiment of the invention, control and computing module 340 also for determining touch location in a second direction according to the position of the sensing unit 200 be touched, and determine position on the touchscreen, described touch point according to the touch location on first direction and the touch location in second direction.Particularly, control and computing module 340 determine the touch location in described second direction by centroid algorithm.
In one embodiment of the invention, first direction is the length direction of sensing unit 200, and second direction is the direction perpendicular to sensing unit 200 length direction, and sensing unit horizontal parallel is arranged or vertical parallel setting.
In a preferred embodiment of the invention, multiple disjoint sensing unit is positioned at same layer, thus under the prerequisite ensureing accuracy of detection, effectively reduces manufacturing cost.
The invention allows for a kind of portable electric appts, comprise contactor control device as above.
The embodiment of the present invention is by applying level signal to the electrode at sensing unit two ends, if this sensing unit is touched, then can form self-capacitance by this sensing unit, therefore the present invention can be charged to this self-capacitance by the level signal applied, and according to the touch location on the proportionate relationship determination touch-screen between the first resistance and the second resistance.And by the detection mode of self-capacitance being carried out to twice charging of the embodiment of the present invention, to offset some immeasurablel physical parameter or to reduce the measurement of physical quantity, thus under the prerequisite ensureing detection speed, effectively improve accuracy of detection.
The embodiment of the present invention proposes a kind of self-capacitance detection mode of novelty, when sensing unit is touched, this sensing unit just can be divided into two resistance by touch point, thus while carrying out self-capacitance detection, consider that these two resistance just can determine the position of touch point on this sensing unit.The structure of the embodiment of the present invention is simple, and for a sensing unit, charge or discharge can be carried out from its first electrode and/or the second electrode, and detect when charge or discharge, RC constant can not only be reduced, save time and raise the efficiency, and can ensure that coordinate can not offset.In addition, the embodiment of the present invention effectively can also improve the to-noise ratio of circuit, reduces circuit noise, improves the induction linearity.In addition, owing to charging to the sensing unit be touched in testing process, therefore wherein small area analysis can be produced, the impact of Vcom level signal on the self-capacitance that sensing unit in touch-screen produces can be eliminated well, therefore can correspondingly eliminate screenmask layer and concerned process steps, thus can reduce costs further while enhancing antijamming capability.
In the description of this instructions, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (21)
1. a touch detecting method for touch-screen, is characterized in that, described touch-screen comprises multiple disjoint sensing unit, and the two ends of each sensing unit have the first electrode and the second electrode respectively, said method comprising the steps of:
By the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to carry out first time charging when a described sensing unit is touched to the self-capacitance of described sensing unit generation;
By at least one ground connection in the first electrode of a described sensing unit and the second electrode, to carry out first time electric discharge to described self-capacitance;
Carry out detecting to obtain the first change detected value between the charging of described first time and the electric discharge of described first time from described first electrode of correspondence or the second electrode;
By the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to carry out second time charging to described self-capacitance;
To the first electrode and the second electrode applying high level signal of a described sensing unit, or, apply high level signal in described first electrode and described second electrode and another in described first electrode and described second electrode is disconnected, to carry out third time charging to described self-capacitance;
Carry out detecting to obtain the second change detected value between the charging of described second time and the charging of described third time from described first electrode of correspondence or the second electrode;
First resistance of described self-capacitance extremely between described first electrode and the proportionate relationship of second resistance of described self-capacitance extremely between described second electrode is calculated according to described first change detected value and the second change detected value; And
According to the proportionate relationship determination touch location between described first resistance and described second resistance.
2. the touch detecting method of touch-screen as claimed in claim 1, it is characterized in that, described first change detected value and the second change detected value are one or more in current detecting changing value, self-capacitance change detected value, level signal change detected value and charge variation amount.
3. the touch detecting method of touch-screen as claimed in claim 1, it is characterized in that, described sensing unit is rectangle, and the first direction of described multiple sensing unit and described touch-screen is parallel to each other, and described touch location is touching object touch location in said first direction.
4. the touch detecting method of touch-screen as claimed in claim 3, it is characterized in that, described sensing unit comprises:
Multiple Part I and multiple parallel Part II, wherein, be connected by described Part II between adjacent described Part I, to form multiple the first groove of being alternately arranged and the second groove, wherein, the opening direction of described multiple first groove and described multiple second groove is contrary, and described touch location is touching object touch location in said first direction.
5. the touch detecting method of the touch-screen as described in claim 3 or 4, is characterized in that, also comprises:
According to the touch location that the position of the described sensing unit be touched is determined in a second direction; And
Position on the touchscreen, touch point is determined according to the touch location on described first direction and the touch location in second direction.
6. the touch detecting method of touch-screen as claimed in claim 5, it is characterized in that, the touch location in described second direction is determined by centroid algorithm.
7. touch detecting method as claimed in claim 5, it is characterized in that, described first direction is the length direction of described sensing unit, and described second direction is the direction perpendicular to described sensing unit, and described sensing unit horizontal parallel is arranged or vertical parallel setting.
8. the touch detecting method of touch-screen as claimed in claim 1, it is characterized in that, described sensing unit comprises:
Part III, one end of described Part III has described first electrode;
Part IV, one end of described Part IV is connected with the other end of described Part III, and the other end of described Part IV has described second electrode.
9. the touch detecting method of touch-screen as claimed in claim 1, it is characterized in that, described sensing unit comprises:
Part V;
Disjoint Part VI and Part VII, described Part VI one end is connected with one end of described Part V, one end of described Part VII is connected with the other end of described Part V, the other end of described Part VI has described first electrode, and the other end of described Part VII has described second electrode.
10. a contactor control device, is characterized in that, comprising:
Substrate;
Multiple disjoint sensing unit, described multiple sensing unit is formed on described substrate, and the two ends of each sensing unit have the first electrode and the second electrode respectively;
Touch-screen control chip, described touch-screen control chip comprises charging module, discharge module, detection module and control and computing module, wherein,
Described charging module, for in first time charging process, the first electrode ground connection of a sensing unit in described multiple sensing unit is applied high level signal to charge to the self-capacitance that a described sensing unit produces when a described sensing unit is touched to the second electrode; In second time charging process, by the first electrode ground connection of a sensing unit in described multiple sensing unit and to the second electrode applying high level signal to charge to described self-capacitance; And in third time charging process, to the first electrode and the second electrode applying high level signal of a described sensing unit, or, apply high level signal in described first electrode and described second electrode and another in described first electrode and described second electrode is disconnected, to carry out third time charging to described self-capacitance
Described discharge module, for after described charging module is to the first time charging of described self-capacitance, by least one ground connection in the first electrode of a described sensing unit and the second electrode, to discharge to described self-capacitance,
Described detection module, detect to obtain the first change detected value between the charging of described first time and first time electric discharge for carrying out from described first electrode of correspondence or the second electrode, and carry out detecting to obtain the second change detected value between the charging of described second time and the charging of described third time from described first electrode of correspondence or the second electrode, and
Described control and computing module, for controlling described charging module, discharge module, detection module, and calculate described self-capacitance to the first resistance between described first electrode and the proportionate relationship between the second resistance between described self-capacitance to described second electrode according to the first change detected value and the second change detected value, and according to the proportionate relationship determination touch location between described first resistance and described second resistance.
11. contactor control devices as claimed in claim 10, is characterized in that, described first change detected value and the second change detected value are one or more in current detecting changing value, self-capacitance change detected value, level signal change detected value and charge variation amount.
12. contactor control devices as claimed in claim 11, it is characterized in that, described detection module is capacitive detection module CTS.
13. contactor control devices as claimed in claim 10, it is characterized in that, described sensing unit is rectangle, and the first direction along described touch-screen between described multiple sensing unit is parallel to each other, and described touch location is touch location in said first direction.
14. contactor control devices as claimed in claim 13, it is characterized in that, described sensing unit comprises:
Multiple Part I and multiple parallel Part II, wherein, be connected by described Part II between adjacent described Part I, to form multiple the first groove of being alternately arranged and the second groove, wherein, the opening direction of described multiple first groove and described multiple second groove is contrary, and described touch location is touching object touch location in said first direction.
15. contactor control devices as described in claim 13 or 14, is characterized in that,
Described control and computing module, also for the touch location that the position of the sensing unit be touched described in basis is determined in a second direction, and determine position on the touchscreen, touch point according to the touch location on described first direction and the touch location in second direction.
16. contactor control devices as claimed in claim 15, it is characterized in that, described control and computing module determine the touch location in described second direction by centroid algorithm.
17. contactor control devices as claimed in claim 15, it is characterized in that, described first direction is the length direction of described sensing unit, and described second direction is the direction perpendicular to described sensing unit, and described sensing unit horizontal parallel is arranged or vertical parallel setting.
18. contactor control devices as claimed in claim 10, is characterized in that, described multiple disjoint sensing unit is positioned at same layer.
19. contactor control devices as claimed in claim 10, it is characterized in that, described sensing unit comprises:
Part III, one end of described Part III has described first electrode;
Part IV, one end of described Part IV is connected with the other end of described Part III, and the other end of described Part IV has described second electrode.
20. contactor control devices as claimed in claim 10, it is characterized in that, described sensing unit comprises:
Part V;
Disjoint Part VI and Part VII, described Part VI one end is connected with one end of described Part V, one end of described Part VII is connected with the other end of described Part V, the other end of described Part VI has described first electrode, and the other end of described Part VII has described second electrode.
21. 1 kinds of portable electric appts, is characterized in that, comprise the contactor control device as described in any one of claim 10-20.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110459316.3A CN102902432B (en) | 2011-07-26 | 2011-12-31 | Touch detecting method and contactor control device |
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