CN102902438A - Touch detecting method, touch screen detecting device and touch device - Google Patents

Touch detecting method, touch screen detecting device and touch device Download PDF

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Publication number
CN102902438A
CN102902438A CN2011104594734A CN201110459473A CN102902438A CN 102902438 A CN102902438 A CN 102902438A CN 2011104594734 A CN2011104594734 A CN 2011104594734A CN 201110459473 A CN201110459473 A CN 201110459473A CN 102902438 A CN102902438 A CN 102902438A
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electrode
sensing unit
touch
capacitance
self
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CN102902438B (en
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李振刚
黄臣
杨云
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BYD Semiconductor Co Ltd
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BYD Co Ltd
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Priority to CN201110459473.4A priority Critical patent/CN102902438B/en
Priority to TW101214202U priority patent/TWM454578U/en
Priority to TW101126426A priority patent/TWI505163B/en
Priority to PCT/CN2012/079208 priority patent/WO2013013629A1/en
Publication of CN102902438A publication Critical patent/CN102902438A/en
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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
    • 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
    • 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
    • G06F3/0448—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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)
  • Electronic Switches (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The invention provides a touch detecting method, a touch screen detecting device and a touch device. The touch device comprises a substrate, a plurality of sensing units which are not interconnected, and a touch screen control chip, wherein the sensing units are formed on the substrate; and each sensing unit is provided with a first electrode and a second electrode, which are oppositely arranged. With the touch device, the signal-to-noise ratio of a circuit can be effectively improved; the noise of the circuit is lowered; and the sensing linearity can be improved.

Description

Touch detecting method, touch screen detection device and contactor control device
Technical field
The present invention relates to electronic device design and manufacturing technology field, particularly a kind of touch detecting method, touch-screen and contactor control device.
Background technology
At present the range of application of touch-screen is from the past ATM (automatic teller machine), minority's business markets such as industrial computer, expand to rapidly mobile phone, PDA (personal digital assistant), GPS (GPS), PMP (MP3, MP4 etc.), even the mass consumption electronic applications such as panel computer.Be used for touch-screen and have advantages of that touch control operation is simple, convenient, hommization, so touch-screen is expected to become the best interface of human-computer interaction and is widely applied in portable set rapidly.
Capacitance touch screen is divided into self-capacitance and mutual capacitance two classes usually.As shown in Figure 1, be the structural drawing of a kind of self-capacitance touch screen common in the prior art.This self-capacitance touch screen mainly contains double-deck diamond structure sensing unit 100 ' and 200 ', it detects principle is that X-axis and Y-axis are scanned respectively, exceeded preset range if detect the capacitance variations of certain point of crossing, then with 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, and is difficult to realize multiple point touching.In addition, owing to adopting bilayer screen, also can cause structure and cost significantly to increase, and diamond structure the coordinate drift can occur in the situation that capacitance change is very little, affected greatly by external interference.
Shown in Fig. 2 a, be the structural drawing of another kind of self-capacitance touch screen common in the prior art.This self-capacitance touch screen adopts triangular pattern screen structure.This self-capacitance touch screen comprises substrate 300 ', is arranged on a plurality of electrodes 500 ' that a plurality of triangle sensing units 400 ' on the substrate 300 ' link to each other with each triangle sensing unit 400 '.Shown in Fig. 2 b, be the detection principle of triangle self-capacitance touch screen.As shown in the figure, ellipse representation finger, S1, S2 represent to point the contact area with two triangle sensing units.The false coordinate initial point is in the lower left corner, horizontal ordinate X=S2/ (S1+S2) * P then, and wherein, P is resolution.When finger moved right, because S2 is not linear the increase, there was a deviation in the X coordinate.Can find out from above-mentioned principle, present triangle sensing unit is single-ended detection, namely only detects from a direction, then calculates the coordinate of both direction by algorithm.Although this self-capacitance touch screen structure is more simple, the capacitive sensing for screen is not optimized, and capacitance change is little, thereby causes signal to noise ratio (S/N ratio) inadequate.In addition, because this sensing unit is triangle, area is not linear the increase when the finger transverse shifting, so the linearity is relatively poor, has caused coordinate Calculation to be offset, and the linearity is good not.
In addition, this capacitive sensing unit output capacitance variable quantity is very little, reaches the flying method level, and the existence of its cable stray capacitance is had 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, disturbs even floods the measured capacitance signal.In addition, for individual layer electric capacity, because the meeting that affects of Vcom level signal forms serious interference to inductance capacitance, wherein, the Vcom level signal is not stop the level signal of overturning in order to prevent the lcd screen liquid crystal aging.
Summary of the invention
Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, particularly solves or avoid to occur the above-mentioned shortcoming in the existing self-capacitance touch screen.
Embodiment of the invention first aspect has proposed a kind of contactor control device, comprising: substrate; A plurality of sensing units, described a plurality of sensing units mutually disjoint, and described a plurality of sensing units are formed on the described substrate, and each of described a plurality of sensing units all has the first electrode and the second electrode; With the touch-screen control chip, described touch-screen control chip respectively with described a plurality of sensing units in each the first electrode link to each other with the second electrode, described touch-screen control chip applies level signal to the first electrode and/or second electrode of described a plurality of sensing units, the self-capacitance charging that described level signal produces to described sensing unit when sensing unit is touched, and described touch-screen control chip one or part when being touched in detecting described a plurality of sensing unit, calculate the first electrode described in the corresponding sensing unit to the first resistance of described self-capacitance and described the second electrode proportionate relationship between the second resistance of described self-capacitance extremely, and determine touch location according to the proportionate relationship between described the first resistance and described the second resistance.Embodiment of the invention second aspect has also proposed a kind of touch screen detection device, comprising: substrate; With a plurality of disjoint sensing units, described a plurality of sensing unit is formed on the described substrate, and each of described a plurality of sensing units all has the first electrode and the second electrode that is oppositely arranged, and wherein, each first electrode all links to each other with a pin of touch screen controller with the second electrode.
The embodiment of the invention third aspect has also proposed a kind of touch detecting method, may further comprise the steps: the first electrode and/or the second electrode to sensing unit apply level signal, wherein, when described sensing unit was touched, described level signal was charged to the self-capacitance that described sensing unit produces; Whether detect in described a plurality of sensing unit one or part sensing unit is touched; Be touched if detect in described a plurality of sensing unit one or part, then calculate the first electrode described in the corresponding sensing unit to the first resistance of described self-capacitance and described the second electrode proportionate relationship between the second resistance of described self-capacitance extremely; And determine touch location according to the proportionate relationship between described the first resistance and described the second resistance.
Embodiment of the invention fourth aspect has also proposed a kind of portable electric appts, comprises aforesaid contactor control device.
The embodiment of the invention the 5th aspect has also proposed a kind of portable electric appts, comprises aforesaid contactor control device.
Sensing unit in the touch screen detection device of the embodiment of the invention adopts both-end to detect, the two ends that are sensing unit all have electrode, and each electrode all links to each other with the corresponding pin of touch-screen control chip, can realize location to the touch point touching when detecting by sensing unit self.
What is more important, the present invention realizes determining of touch location by calculating the first resistance and the second resistance ratio, therefore with respect to present rhombus or triangular design, because when determining touch location, need not to calculate the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, thereby has improved measuring accuracy, has improved the linearity.
The embodiment of the invention has proposed a kind of detection method of novelty, by the existing self-capacitance charging that sensing unit is produced, determines touch location on first direction according to the proportionate relationship between the first resistance and the second resistance again.For example in one embodiment of the invention, proportionate relationship between the first resistance and the second resistance can be according to the self-capacitance charge/discharge time, from the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates.Therefore the method relatively with existing self-capacitance detection method, the property that can greatly improve accuracy of detection and the circuit ratio of making an uproar, and reduce circuit noise improves the induction linearity.And, in testing process, because the sensing unit that is touched is carried out charge or discharge, therefore wherein can produce little electric current, thereby strengthen antijamming capability.
The aspect that the present invention adds and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or the additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the structural drawing of a kind of self-capacitance touch screen common in the prior art;
Fig. 2 a is the structural drawing of another kind of self-capacitance touch screen common in the prior art;
Fig. 2 b is the detection schematic diagram of another kind of self-capacitance touch screen common in the prior art;
Fig. 3 is the detection principle schematic of embodiment of the invention contactor control device;
Fig. 4 is the touch detecting method process flow diagram of the embodiment of the invention;
Fig. 5 is the contactor control device schematic diagram of one embodiment of the invention;
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 the embodiment of the 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; And
Figure 10 is the schematic diagram of the sensing unit of the embodiment of the invention when being touched.
Embodiment
The below describes embodiments of the invention in detail, and the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment that is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
The embodiment of the invention has proposed a kind of self-capacitance detection mode of novelty, when sensing unit is touched, the touch point can be divided into this sensing unit two resistance, is carrying out considering when self-capacitance detects that these two resistance just can determine the position of touch point on this sensing unit.As shown in Figure 3, be the detection principle schematic of embodiment of the invention contactor control device.When this sensing unit of finger touch, will be equivalent to this sensing unit is divided into two resistance, the resistance of these two resistance is relevant with the position of touch point.For example, as described in Figure, when touch point and the first electrode were nearer, then resistance R 1 was just less, and resistance R 2 is just larger; Anyway, when touch point and the second electrode were nearer, then resistance R 1 was just larger, and resistance R 2 is just less.Therefore, the present invention just can determine the position of touch point on this sensing unit by the detection to resistance R 1 and R2.In an embodiment of the present invention, can detect in several ways resistance R 1 and R2, for example can be by in the current detection value, self-capacitance detected value, level signal detected value and the charge variation amount that detect the first electrode and the second electrode one or more, thus resistance R 1 and R2 obtained according to these detected values.In addition, in an embodiment of the present invention, detection can be carried out (obtaining the first charging detected value and the second charging detected value) when charging, also can carry out (obtaining the first discharge examination value and the second discharge examination value) when discharge.In addition, the detection of carrying out when charging and discharging can be adopted various ways.But need to prove, have at least a step that the first electrode and the second electrode are carried out in charging, discharge or the detection, can obtain like this to react two detected values of difference between the first resistance and the second resistance, i.e. the first detected value and the second detected value.That is to say electric current need to be arranged through the first resistance and the second resistance when charging, discharge or detection, the first detected value that detects like this and the second detected value can react the difference between the first resistance and the second resistance.In an embodiment of the present invention, usually need to fill twice electricity (comprising simultaneously the situation to the first electrode and the second electrode charge), and twice detection.In certain embodiments, also may carry out twice discharge.All be to carry out twice charging and twice detection in following embodiment, in following embodiment, repeat no more.Need to prove at this, carry out a kind of scheme that twice charging and twice detection only are the embodiment of the invention, algorithm is relatively simple.Yet those skilled in the art also can increase according to above-mentioned thought the number of times of charging and detection, for example can carry out three chargings and detection, calculate the first resistance according to primary charging detected value and secondary charging detected value afterwards, calculate the second resistance according to primary charging detected value and charging detected value for the third time again.
Particularly, the present invention includes but be not limited to following several metering system and detect:
1, elder generation applies level signal with self-capacitance is charged (will produce self-capacitance if this sensing unit is touched) to the first electrode and second electrode of sensing unit; Then charge detection to obtain the first charging detected value and the second charging detected value from the first electrode and/or the second electrode.In this embodiment, because charging is carried out from the first electrode and the second electrode, therefore for detecting, both can detect from the first electrode, also can detect from the second electrode, perhaps also can detect respectively from the first electrode and the second electrode.Also need to prove, in this embodiment, charging to the first electrode and the second electrode can be carried out simultaneously, also can carry out respectively, for example apply simultaneously identical level signal so that self-capacitance is charged at the first electrode and the second electrode, in other embodiments, the level signal that applies of the first electrode and the second electrode also can be different; Perhaps, also can apply a level signal at the first electrode first, apply same level signal or another level signal at the second electrode more afterwards.Similarly, both can carry out simultaneously when detecting, also can carry out respectively.In following examples, charging, discharge or detection all can be carried out simultaneously, perhaps carry out respectively, do not repeat them here.
2, the first electrode or the second electrode to described sensing unit applies respectively level signal for twice so that described self-capacitance is carried out twice charging; Then after each charging, charge detection to obtain described the first charging detected value and the second charging detected value from described the first electrode and/or the second electrode.In this embodiment, because charging is carried out from the first electrode or the second electrode, therefore need to detect respectively from the first electrode and the second electrode when detecting, wherein, detection can be carried out simultaneously, also can carry out respectively.In addition, in an embodiment of the present invention, can also carry out twice charging at the first electrode, and carry out twice detection from the first electrode, perhaps, carry out twice charging from the second electrode, carry out twice detection at the second electrode.So long as, twice when charging, respectively with another electrode grounding or connect high resistant to change the state of another electrode.For example apply respectively level signal for twice self-capacitance being carried out twice when charging when the first electrode to sensing unit, wherein, in twice charging once with described the second electrode grounding, another time connects described the second electrode and is high resistant; When the second electrode to sensing unit applies respectively level signal for twice self-capacitance being carried out twice when charging, in twice charging once with described the first electrode grounding, another time connects described the first electrode and is high resistant.Even carried out twice charging at the first electrode like this, because the change of the second electrode state, also can carry out twice detection at the first electrode, to obtain to react the first detected value and second detected value of the first resistance R 1 and the second resistance R 2 ratios relation.3, the first electrode and the second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control the first electrode and/or the second electrode grounding so that self-capacitance is discharged; Carry out discharge examination to obtain described the first discharge examination value and the second discharge examination value from the first electrode and/or the second electrode afterwards.In this embodiment, because charging is carried out from the first electrode and the second electrode to self-capacitance, therefore discharge or detection just can be carried out from the first electrode and/or the second electrode.Particularly, for example can apply level signal so that self-capacitance is charged to the first electrode and the second electrode simultaneously, perhaps also can not apply simultaneously.Twice discharge can be all with the first electrode grounding, perhaps all with the second electrode grounding when discharge.
4, the first electrode or the second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control respectively the first electrode and the second electrode grounding so that self-capacitance is discharged; Carry out discharge examination to obtain the first discharge examination value and the second discharge examination value from the first electrode and/or the second electrode respectively afterwards.In this embodiment, because discharge is carried out from the first electrode and the second electrode to self-capacitance, therefore charging or detection just can be carried out from the first electrode and/or the second electrode.In this embodiment, twice charging also can all be used the first electrode, and with the second electrode ground connection or connect and be high resistant respectively.Similarly, twice charging also can all be used the second electrode, and with the first electrode ground connection or connect and be high resistant respectively.
5, the first electrode or the second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control respectively the first electrode or the second electrode grounding with to the self-capacitance discharge, carry out discharge examination to obtain the first discharge examination value and the second discharge examination value from the first electrode and the second electrode respectively afterwards.In this embodiment, because detection is carried out from the first electrode and the second electrode to self-capacitance, so charge or discharge just can be carried out from the first electrode and/or the second electrode.In this embodiment, twice charging also can all be used the first electrode, and with the second electrode ground connection or connect and be high resistant respectively.Similarly, twice charging also can all be used the second electrode, and with the first electrode ground connection or connect and be high resistant respectively.
Perhaps, on the basis of above-described embodiment, can also when charging, carry out one-time detection to obtain the first charging detected value, carry out second time in when discharge and detect to obtain the second discharge examination value, obtain proportionate relationship between the first resistance and the second resistance according to the first charge detected value and the second discharge examination value again.
Need to prove, in an embodiment of the present invention, above-mentioned the first electrode is identical with the function of the second electrode, and the two can exchange, therefore in the above-described embodiments, both can also can be from the second electrode detection from the first electrode detection, if can satisfy in charging, discharge or when detecting needs electric current is arranged through the first resistance and this requirement of the second resistance.
Can find out for above-mentioned charging of the present invention and detection mode a variety of variations are arranged from foregoing description, but core of the present invention is exactly according to the relation between the first resistance and the second resistance, for example proportionate relationship or other concern to determine the position of touch point.Further, the relation between this first resistance and the second resistance need to detect by charging and/or the discharge of self-capacitance.If sensing unit is not touched, then just can not produce self-capacitance with hand, the data that therefore detect self-capacitance can be very little, do not satisfy the Rule of judgment that touches, for constantly scanning in this embodiment of the invention, wait for that finger touch just begins to calculate after sensing unit, do not repeat them here.
In an embodiment of the present invention, can apply corresponding voltage to a plurality of sensing units successively in the mode of scanning, when detecting, also can detect successively in the mode of scanning simultaneously.
Also need to prove in addition, above-mentioned detection mode only is optimal ways more of the present invention, and those skilled in the art also can expand or revise according to above-mentioned thought, and these all should be included within protection scope of the present invention.
As shown in Figure 4, be the touch detecting method process flow diagram of the embodiment of the invention, this process flow diagram together describes in conjunction with schematic diagram shown in Figure 3.The method may further comprise the steps:
Step S401 applies level signal to the two ends of sensing unit, and namely the first electrode and/or the second electrode to sensing unit applies level signal.In this embodiment, can apply identical level signal with the second electrode to the first electrode, also can apply different level signals.In other embodiments, also can only charge twice from the first electrode or the second electrode, perhaps for the first time from the first electrode charge for the second time from the second electrode charge, perhaps for the first time from the second electrode charge for the second time from the first electrode charge.
If this moment, this sensing unit was pointed or other objects touches, then this sensing unit will produce self-capacitance C1 (with reference to Fig. 3), just can charge to self-capacitance by the level signal that applies.In an embodiment of the present invention, by the charging to self-capacitance, can improve the accuracy of detection of self-capacitance.
Need to prove, if apply simultaneously level signal to the two ends of sensing unit, then need corresponding two capacitive detection module CTS to detect from the two ends of sensing unit simultaneously.And if respectively to the two ends time, then only need a capacitive detection module CTS to get final product.In one embodiment of the invention, the first detected value and the second detected value can for from the first electrode and/or the second electrode detection to capacitance charge variation delta Q1 and Δ Q2.By Δ Q1 and Δ Q2, namely detect and derive from capacitance change, just can calculate the ratio of R1 and R2, owing 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.
Step S402 detects sensing unit from the two ends of sensing unit, to obtain the first detected value and the second detected value.In this embodiment, detection can be carried out when charging, also can carry out when discharge.In above-mentioned example, the first detected value and the second detected value are respectively Δ Q1 and Δ Q2.Below be described as the charge variation amount as example take the first detected value and the second detected value, but can reaction resistance R1 and other detected values of R2 relation, also all can adopt such as level signal, electric current etc.In an embodiment of the present invention, both can detect simultaneously, also can detect respectively.
In one embodiment of the invention, if detect simultaneously, then need two self-capacitance touch screen control chips simultaneously the first electrode and the second electrode to be detected.
In another embodiment of the present invention, also can adopt a self-capacitance touch screen control chip to detect, in step S401, after being full of by the first electrode pair self-capacitance C1, namely this self-capacitance touch screen control chip detects by the first electrode pair self-capacitance C1.Then again by the second electrode pair self-capacitance C2 charging, then this self-capacitance touch screen control chip detects by the second electrode pair self-capacitance C1 again.
Because the phase place that adopts when the self-capacitance touch screen control chip scans this sensing unit is all consistent with level signal, the electric charge when therefore charging for same self-capacitance C1 just equals the inverse ratio of their resistance.Supposing, is respectively Δ Q1 and Δ Q2 from the first electrode of sensing unit and the charge variation amount of the second electrode pair sensing unit detection acquisition.In an embodiment of the present invention, the self-capacitance touch screen control chip can be at present known self-capacitance touch screen control chip.In one embodiment of the invention, if adopt two self-capacitance touch screen control chips, but then owing to two a plurality of devices of self-capacitance touch screen control chip technique, therefore can not increase the overall power of chip.
Step S403 judges according to the first detected value and the second detected value whether this sensing unit is touched.Particularly, in one embodiment of the invention, can whether determine whether to be touched greater than threshold value by judging charge variation amount Δ Q1 and Δ Q2.Certainly, in other embodiments of the invention, also other judgment modes can be set, whether for example judge charge variation amount Δ Q1 and Δ Q2 less than threshold value, if less than, judge that then sensing unit is touched.Similarly, this threshold value also needs according to the size of touch-screen and type, and the size of sensing unit is determined.
Step S404 is touched if judge this sensing unit, then further calculates the first electrode described in the corresponding sensing unit this moment to the first resistance of described self-capacitance and described the second electrode proportionate relationship between the second resistance of described self-capacitance extremely.And according to the definite touch location that touches object (for example finger) of the proportionate relationship between the first resistance and described the second resistance.In an embodiment of the present invention, proportionate relationship between the first resistance and described the second resistance is according to the self-capacitance charge/discharge time, from the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates.The same, the coordinate on the sensing unit at C1 place is Δ Q2/ (Δ Q1+ Δ Q2).
In an embodiment of the present invention, if sensing unit is door shape sensing unit or L shaped sensing unit, then just can determine touch location on touch-screen to describe in detail below with reference to concrete example by the ratio between the first resistance and the second resistance.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 S404 can only calculate the touch location on the touch-screen first direction, and this first direction can be the length direction (for example horizontal direction of 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 of location positioning on second direction according to 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.
Particularly, can adopt centroid algorithm to calculate the touch location of touch point on second direction, below centroid algorithm simply be introduced.
In draw runner and touch pad application, often be necessary more than the essential spacing of concrete sensing unit, to determine the position of finger (or other capacitive object).The touch panel of finger on draw runner or touch pad is usually greater than any sensing unit.In order to adopt the position after touch is calculated at a center, this array is scanned to verify that given sensing station is effectively, be to be greater than default touch threshold for the requirement of the adjacent sensing unit signal of some.After finding the strongest signal, this signal and those greater than the closing signal of touch threshold all for computing center:
N Cent = n i - 1 ( i - 1 ) + n i i + n i + 1 ( i + 1 ) n i - 1 + n i + n i + 1
Wherein, locate the label of sensing unit centered by the Ncent, n is the number that detects the sensing unit that is touched, and i is the sequence number of sensing unit of being touched, and wherein i is more than or equal to 2.
For example, when finger touch at article one passage, its capacitance change is y1, the capacitance change on the second passage is that the capacitance change on y2 and the 3rd passage is when being y3.Wherein second channel y2 capacitance change is maximum.The Y coordinate just can be at last:
Y = y 1 * 1 + y 2 * 2 + y 3 * 3 y 1 + y 2 + y 3 .
The embodiment of the invention has proposed a kind of contactor control device according to above-mentioned thought.This contactor control device comprises substrate, a plurality of disjoint sensing unit.In an embodiment of the present invention, can be parallel to each other between disjoint sensing unit, perhaps also can be partly parallel between disjoint sensing unit.Wherein, a plurality of sensing units are formed on the substrate, and each of a plurality of sensing units all has the first electrode and the second electrode that is oppositely arranged.As shown in Figure 5, be the contactor control device schematic diagram of one embodiment of the invention.This contactor control device comprises substrate 100, a plurality of disjoint sensing unit 200 and touch-screen control chip 300.In an embodiment of the present invention, substrate 100 can be single layer substrate.Wherein, as shown in the figure, this contactor control device adopts the sensing unit 200 of rectangle, and this rectangle sensing unit 200 has higher length breadth ratio, and sensing unit 200 has the first electrode 210 and the second electrode 220 that is oppositely arranged.Adopt parallel rectangle sensing unit 200 can reduce the structure complexity of device, thereby can reduce manufacturing cost on the basis that guarantees accuracy of detection.But need to prove at this, for a plurality of sensing units, do not limit it and be the structure of Fig. 5, this sensing unit 200 also can adopt other structure, have certain radian etc. such as part or all of sensing unit, these all can be applicable among the present invention.Touch-screen control chip 300 links to each other with the second electrode 220 with the first electrode 210 of a plurality of sensing units 200 respectively.And touch-screen control chip 300 applies level signal to the first electrode 210 and/or second electrode 220 of a plurality of sensing units 200, so that the self-capacitance charging that this level signal can produce to sensing unit 200 when sensing unit 200 is touched, and touch-screen control chip 300 one or part when being touched in detecting a plurality of sensing units 200, calculate the first electrode 210 in the corresponding sensing unit to the first resistance of self-capacitance and the second electrode 220 to the proportionate relationship between the second resistance of self-capacitance, and determine touch location on first direction according to the proportionate relationship between the first resistance and the second resistance, and according to the touch location of location positioning on second direction of the sensing unit 200 that is touched.
Particularly, proportionate relationship between the first resistance and the second resistance is according to the self-capacitance charge/discharge time, from the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates, can carry out simultaneously charging, discharge or the detection of the first electrode and the second electrode as mentioned above, also can separately carry out.When touch-screen control chip 300 determines that according to the first detected value and the second detected value corresponding sensing unit is touched, then touch-screen control chip 300 calculates the proportionate relationship of the first resistance and the second resistance according to the first detected value and the second detected value, thereby further judge the touch location on first direction, and according to the touch location of location positioning on second direction of the sensing unit 200 of correspondence.Last touch-screen control chip 300 just can be determined the position of touch point on touch-screen according to the touch location on the first direction and the touch location on the second direction.Also need to prove at this, in an embodiment of the present invention for not restriction concerning the charging and discharging order of sensing unit, for example in one embodiment, can charge successively to all sensing units 200 in the mode of scanning, then in turn it be carried out discharge examination again; In another embodiment, can carry out charging and discharging to sensing unit 200 one by one, for example to after 200 chargings of a sensing unit, with that it be carried out discharge examination, after this sensing unit 200 finished dealing with, more next sensing unit 200 is processed.In one embodiment of the invention, touch-screen control chip 300 applies level signal so that self-capacitance is charged to the first electrode 210 and second electrode 220 of sensing unit 200, and touch-screen control chip 300 charges detection to obtain the first charging detected value and the second charging detected value from the first electrode 210 and/or the second electrode 220.
In one embodiment of the invention, touch-screen control chip 300 applies level signal so that self-capacitance is charged to the first electrode 210 or second electrode 220 of sensing unit 200, and touch-screen control chip 300 charges detection to obtain the first charging detected value and the second charging detected value from the first electrode 210 and the second electrode 220 respectively.
In one embodiment of the invention, touch-screen control chip 300 applies level signal so that self-capacitance is charged to the first electrode 210 and second electrode 220 of sensing unit 200, touch-screen control chip 300 control the first electrodes 210 and/or the second electrode 220 ground connection are to discharge to self-capacitance, and touch-screen control chip 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from the first electrode and/or the second electrode.
In one embodiment of the invention, touch-screen control chip 300 applies level signal so that self-capacitance is charged to the first electrode 210 or second electrode 220 of sensing unit 200, touch-screen control chip 300 is controlled respectively the first electrode 210 and the second electrode 220 ground connection with to the self-capacitance discharge, and touch-screen control chip 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from the first electrode 210 and/or the second electrode 220 respectively.
In one embodiment of the invention, touch-screen control chip 300 applies level signal so that self-capacitance is charged to the first electrode 210 or second electrode 220 of sensing unit 200, touch-screen control chip 300 is controlled respectively the first electrode 210 or the second electrode 220 ground connection with to the self-capacitance discharge, and touch-screen control chip 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from the first electrode 210 and the second electrode 220 respectively.
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.Although in Fig. 5 of this embodiment, the sensing unit along continuous straight runs is placed, in other embodiments, sensing unit also can vertically arrange.
It will be appreciated by those skilled in the art that, for sensing unit, as long as the length of sensing unit satisfies the touch-screen requirement, and two end electrodes links to each other from the different pin of touch screen controller respectively and gets final product can sensing unit being carried out charging and discharging, therefore can find out that the present invention does not limit the concrete structure of sensing unit.Sensing unit can have various structures, and those skilled in the art can change sensing unit on the basis of the above-mentioned thought of the present invention or improve, but just should be included within the scope of the present invention as long as do not break away from these structures of above-mentioned thought of the present invention.In this embodiment of the invention a kind of improved sensing unit structure has been proposed also.
Shown in Fig. 6 a, be the sensing unit structural drawing of one embodiment of the invention.This sensing unit 200 comprises a plurality of firsts 230 and a plurality of parallel second portions 240, wherein, link to each other by second portion 240 between the adjacent first 230, with the first groove 1000 and the second groove 2000 that forms a plurality of alternative arrangements, wherein, the opening direction of a plurality of the first grooves 1000 and a plurality of the second grooves 2000 is opposite.Preferably, second portion 240 is arranged along first direction.In one embodiment of the invention, a plurality of firsts 230 can be parallel to each other, also can be not parallel.And preferably, second portion 240 is rectangle.In other embodiments of the invention, first 230 also can be rectangle, but first 230 also can be other various shape.In this embodiment, increase the impedance of resistance by first 230, thereby the impedance that increases sensing unit 200 so that the first resistance and the second resistance more easily detect, improves accuracy of detection further.And in this embodiment, preferably, the interval between the second portion 240 is equal, thereby 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 directions and the size of substrate are basically identical, so contactor control device is simple in structure, easily make, and low cost of manufacture.
In one embodiment of the invention, the first electrode 210 and the second electrode 220 link to each other with two firsts in a plurality of firsts 230 respectively.The first electrode 210 and the second electrode 220 link to each other with two second portions in a plurality of second portions 240 respectively, shown in Fig. 6 b but in another embodiment of the present invention.
And in an embodiment of the present invention, mutually vertical between second portion 240 and the first 230, the angle between the two is preferably 90 degree, certainly also can select other angles.Shown in Fig. 6 a, this sensing unit 200 joins end to end a plurality of firsts 230 by a plurality of second portions 240, and the first electrode 210 of sensing unit 200 links to each other with the first 230 at two ends respectively with the second electrode 220.On one-piece construction, this sensing unit 200 is for having the rectangle than the aspect ratio.This need to prove, although in Fig. 6 a with sensing unit 200 along the X-axis setting, it will be understood by those skilled in the art that this sensing unit 200 also can be along the Y-axis setting.Structure by this sensing unit is noise reduction effectively, improves the linearity of induction.
Shown in Fig. 7 a, 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 the length of each sensing unit 200 is different in a plurality of sensing unit 200, and is mutually nested between a plurality of sensing units 200.Wherein, each described sensing unit comprises third part 250, disjoint the 4th part 260 and the 5th part 270.Preferably, third part 250 is parallel with the first side 110 of substrate 100, the 4th part 260 is parallel with the Second Edge 120 of substrate 100 with the 5th part 270, and the 4th part 260 1 ends link to each other with an end of third part 250, and an end of the 5th part 270 links to each other with the other end of third part 250.The other end that the other end of the 4th part 260 of sensing unit 200 has the first electrode 210, the five parts 270 has the second electrode 220, and wherein, each first electrode 210 all links to each other 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 in the outside that refers to partly surrounds inboard sensing unit, for example shown in Fig. 7 a, can reach larger coverage rate when guaranteeing precision like this, and reduce the complexity of computing, improve the response speed of touch-screen.Certainly those skilled in the art also can adopt according to the thought of Fig. 7 a other mutually nested modes to arrange sensing unit.In one embodiment of the invention, the third part 250 of each sensing unit 200 is parallel with the third part 250 of other sensing units 200, the 4th part 260 of each sensing unit 200 is parallel with the 4th part 260 of other sensing units 200, and the 5th part 270 of each sensing unit 200 is parallel with the 5th part 270 of other sensing units 200.In one embodiment of the invention, at least one is rectangle in the third part 250 of sensing unit 200, the 4th part 260 and the 5th part 270, and preferably, third part 250, the 4th part 260 and the 5th part 270 are rectangle.In this embodiment because rectangular configuration figure rule, therefore finger laterally or when vertically moving the linearity good, in addition, the spacing between two rectangular configuration is identical, is convenient to calculate, thereby improves computing velocity.
In one embodiment of the invention, the 4th part 260 of each sensing unit 200 and the 5th part 270 equal in length.
In one embodiment of the invention, substrate 100 is rectangle, and is mutually vertical between first side 110 and the Second Edge 120, and mutually vertical between the 4th part 260 and the third part 250, mutually vertical between the 5th part 270 and the third part 250.
In one embodiment of the invention, spacing between the third part 250 of adjacent two sensing units 200 equates, spacing between the 4th part 260 of adjacent two sensing units 200 is equal, and the spacing between the 5th part 270 of adjacent two sensing units 200 equates.So just can evenly divide by first side 110 and the Second Edge 120 of 200 pairs of touch-screens of a plurality of sensing units, thereby improve arithmetic speed.Certainly in other embodiments of the invention, the spacing between the third part 250 of adjacent two sensing units 200 also can be unequal, and perhaps, the spacing between the 4th part 260 of adjacent two sensing units 200 also can be unequal, shown in Fig. 7 b.For example, because the user often touches the centre of touch-screen, therefore the spacing between the sensing unit at touch screen center position can be reduced, thereby improve the accuracy of detection in centre.
In one embodiment of the invention, a plurality of sensing units 200 are symmetrical with respect to the central shaft Y of substrate 100, and shown in Fig. 7 a, central shaft Y is perpendicular to third part 250, thereby more is conducive to improve precision.
Shown in Fig. 7 a, in this embodiment, the first electrode 210 and second electrode 220 of sensing unit 200 all are positioned on the first side 110 of substrate 100.In this embodiment, detect after the touch location on sensing unit, can obtain the touch location on touch-screen.
Need to prove, above-mentioned Fig. 7 a is the more excellent embodiment of the present invention, and it can obtain larger coverage rate, but other embodiment of the present invention can carry out the variation that some are equal to Fig. 7 a, and for example the 4th part 260 and the 5th part 270 can be uneven.
The structure of the sensing unit employing similar door shape in the embodiment of the invention, not only simple in structure, to be convenient to make, institute is leaded, and it is convenient to design all on one side same, reduces silver-colored slurry cost and making easily, and Decrease production cost is had very great help.
Schematic diagram when being touched for the sensing unit of the embodiment of the invention as shown in Figure 8.As can be seen from Figure 8, the first electrode is 210, the second electrode is 220, touch location is close to the second electrode, the length of supposing sensing unit is 10 unit lengths, and sensing unit is divided into 10 parts equably, wherein, the length of sensing unit third part 250 is 4 unit lengths, and the length of sensing unit the 4th part 260 and the 5th part 270 is 3 unit lengths.Through detecting, the ratio of knowing the first resistance and the second resistance is 4: 1, and namely the first electrode 210 to the length (being embodied by the first resistance) of touch location is 80% of whole sensing unit length.In other words, the touch point is positioned at the position of 8 unit lengths in distance the first electrode 210 places, knows, the touch point is positioned at the position of 2 unit lengths in distance the second electrode 220 places.When finger was mobile, therefore the corresponding movement of touch location meeting just can judge the corresponding motion track of finger by the conversion of touch location, thereby judged user's input instruction.
Can find out from the above example of Fig. 8, account form of the present invention is very simple, therefore can greatly improve the reaction velocity that touch-screen detects.
Shown in Fig. 9 a, be another embodiment Touch-screen testing equipment structural drawing of the present invention.In one embodiment of the invention, the length of a plurality of sensing units increases gradually, and each described sensing unit comprises the 6th part 280 and the 7th part 290.The end that one end of the 6th part 280 has the first electrode 210, the seven parts 290 links to each other with the other end of the 6th part 280, and the other end of the 7th part 290 has the second electrode 220.
Particularly, the 6th part 280 is parallel with the first side 110 of substrate 100, and the 7th part 290 is parallel with the Second Edge 120 of substrate 100, and first side 110 is adjacent with Second Edge 120.And each first electrode 210 all links to each other with the corresponding pin of touch-screen control chip with the second electrode 220.
In a preferred embodiment of the invention, the 6th part 280 of each sensing unit 200 is parallel with the 6th part 280 of other sensing units 200, and the 7th part 290 of each sensing unit 200 is parallel with the 7th part 290 of other sensing units 200.Can effectively improve sensing unit to the coverage rate of touch-screen by such setting.In one embodiment of the invention, at least one is rectangle in the 6th part 280 of sensing unit 200, the 7th part 290, and preferably, the 6th part 280, the 7th part 290 are rectangle.In this embodiment because rectangular configuration figure rule, therefore finger laterally or when vertically moving the linearity good, 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 invention adopts both-end to detect, the two ends that are sensing unit all have electrode, and each electrode all links to each other with the corresponding pin of touch-screen control chip, can realize location to the touch point touching when detecting by sensing unit self.
What is more important, the present invention realizes determining of touch location by calculating the first resistance and the second resistance ratio, therefore with respect to present rhombus or triangular design, because when determining touch location, need not to calculate the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, the dependence of self-capacitance accuracy of detection is reduced, thereby improved measuring accuracy, improved the linearity.In addition, any one all can be the rectangle of regular shape because in the 5th part 270, the 6th part 280 and the 7th part 290 of the embodiment of the invention, therefore with respect to irregular shapes such as present rhombus or triangles, also can improve further the linearity.
In one embodiment of the invention, the 6th part 280 of each sensing unit and the 7th part 290 equal in length, thus can improve arithmetic speed.Preferably, substrate 100 is rectangle, and is mutually vertical between first side 110 and the Second Edge 120.First side 110 is mutually vertical with Second Edge 120, not only so that the sensing unit design is more regular, for example so that also mutually vertical between the 6th part 280 of sensing unit and the 7th part 290, thereby improve the coverage rate to touch-screen, and mutually vertically also can improve the linearity of detection between the 6th part 280 and the 7th part 290.
In one embodiment of the invention, the spacing between adjacent two sensing units 200 equates, so just can evenly divide by first side 110 and the Second Edge 120 of 200 pairs of touch-screens of a plurality of sensing units, thereby improve arithmetic speed, improves computing velocity.
Certainly in another embodiment of the present invention, spacing between adjacent two sensing units 200 can not wait yet, shown in Fig. 9 b, for example because the user often touches the centre of touch-screen, therefore the spacing between the sensing unit at touch screen center position can be reduced, thereby improve the accuracy of detection in centre.
Shown in Fig. 9 a, in this embodiment, the first electrode 210 of sensing unit 200 is positioned on the first side 110 of substrate 100, and the second electrode 220 is positioned on the Second Edge 120 of substrate 100, and first side 110 is mutually vertical with Second Edge 120.In this embodiment, detect after the touch location on sensing unit, can obtain the touch location on touch-screen.
Schematic diagram when being touched for the sensing unit of the embodiment of the invention as shown in figure 10.As can be seen from Figure 10, the first electrode is 210, the second electrode is 220, touch location is close to the second electrode 220, the length of supposing sensing unit is 10 unit lengths, and sensing unit is divided into 10 parts equably, wherein, the length of sensing unit the 6th part 280 is 5 unit lengths, and the length of sensing unit the 7th part 290 is 5 unit lengths.Through detecting, the ratio of knowing the first resistance and the second resistance is 9: 1, and namely the first electrode 210 to the length (being embodied by the first resistance) of touch location is 90% of whole sensing unit length.In other words, the touch point is positioned at the position of 9 unit lengths in distance the first electrode 210 places, knows, the touch point is positioned at the position of 1 unit length in distance the second electrode 220 places.
Can find out from the above example of Figure 10, account form of the present invention is very simple, therefore can greatly improve the reaction velocity that touch-screen detects.
In one embodiment of the invention, a plurality of sensing units 200 are positioned at same layer, therefore only need one deck ITO to get final product, thereby when guaranteeing precision, greatly reduce manufacturing cost.
Sensing unit in the touch screen detection device of the embodiment of the invention adopts both-end to detect, the two ends that are sensing unit all have electrode, and each electrode all links to each other with the corresponding pin of touch-screen control chip, can realize location to the touch point touching when detecting by sensing unit self.
What is more important, the present invention realizes determining of touch location by calculating the first resistance and the second resistance ratio, therefore with respect to present rhombus or triangular design, because when determining touch location, need not to calculate the size of self-capacitance, and the size of self-capacitance can not affect the precision of touch location, the dependence of self-capacitance accuracy of detection is reduced, thereby improved measuring accuracy, improved the linearity.
In sum, the embodiment of the invention applies level signal by the electrode to the sensing unit two ends, if this sensing unit is touched, then can form self-capacitance by this sensing unit, therefore the present invention can charge to this self-capacitance by the level signal that applies, and determines touch location on first direction according to the proportionate relationship between the first resistance and the second resistance.For example in one embodiment of the invention, proportionate relationship between the first resistance and the second resistance is according to described self-capacitance charge/discharge the time, from described the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates.The first detected value and the second detected value that produce during therefore from the first electrode and/or this self-capacitance charge/discharge of the second electrode detection.Like this, just can react the position that the touch point is positioned at this sensing unit by the first detected value and the second detected value, thereby determine that further the touch point is in the position of touch-screen.
The embodiment of the invention has proposed a kind of self-capacitance detection mode of novelty, when sensing unit is touched, the touch point just can be divided into this sensing unit two resistance, thereby is carrying out considering when self-capacitance detects that these two resistance just can determine the position of touch point on this sensing unit.The embodiment of the invention simple in structure, and for a sensing unit, can carry out charge or discharge from its first electrode and/or the second electrode, and when charge or discharge, detect, not only can reduce the RC constant, save time and raise the efficiency, and can guarantee that coordinate can not be offset.In addition, the property that the embodiment of the invention can also the Effective Raise circuit ratio of making an uproar reduces circuit noise, improves the induction linearity.And, in testing process because the sensing unit that is touched is charged, therefore wherein can produce little electric current, can eliminate well the Vcom level signal to the impact of the self-capacitance of sensing unit generation in the touch-screen, therefore screenmask layer and concerned process steps can be correspondingly eliminated, thereby cost can be when having strengthened antijamming capability, further reduced.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or the example in conjunction with specific features, structure, material or the characteristics of this embodiment or example description.In this manual, the schematic statement of above-mentioned term not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or characteristics can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.

Claims (46)

1. a contactor control device is characterized in that, comprising:
Substrate;
A plurality of sensing units, described a plurality of sensing units mutually disjoint, and described a plurality of sensing units are formed on the described substrate, and each of described a plurality of sensing units all has the first electrode and the second electrode; With
The touch-screen control chip, described touch-screen control chip respectively with described a plurality of sensing units in each the first electrode link to each other with the second electrode, described touch-screen control chip applies level signal to the first electrode and/or second electrode of described a plurality of sensing units, the self-capacitance charging that described level signal produces to described sensing unit when sensing unit is touched, and described touch-screen control chip one or part when being touched in detecting described a plurality of sensing unit, calculate the first electrode described in the corresponding sensing unit to the first resistance of described self-capacitance and described the second electrode proportionate relationship between the second resistance of described self-capacitance extremely, and determine touch location according to the proportionate relationship between described the first resistance and described the second resistance.
2. contactor control device as claimed in claim 1, it is characterized in that, proportionate relationship between described the first resistance and described the second resistance is according to described self-capacitance charge/discharge the time, from described the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates.
3. contactor control device as claimed in claim 2 is characterized in that, described the first detected value and described the second detected value are one or more in current detection value, self-capacitance detected value, level signal detected value and the charge variation amount.
4. contactor control device as claimed in claim 1 is characterized in that, described sensing unit is rectangle, and described touch location is the touch location on first direction.
5. contactor control device as claimed in claim 1 is characterized in that, described sensing unit comprises:
A plurality of firsts and a plurality of parallel second portions, wherein, link to each other by described second portion between the adjacent described first, with the first groove and the second groove that forms a plurality of alternative arrangements, wherein, the opening direction of described a plurality of the first groove and described a plurality of the second grooves is opposite, and described touch location is the touch location on first direction.
6. contactor control device as claimed in claim 5 is characterized in that, described second portion is arranged along described first direction.
7. such as each described contactor control device of claim 4-6, it is characterized in that, described touch-screen control chip also is used for the touch location of location positioning on second direction according to the described sensing unit that is touched.
8. contactor control device as claimed in claim 7 is characterized in that, described touch-screen control chip is determined described touch location according to the touch location on the described first direction and the touch location on the second direction.
9. contactor control device as claimed in claim 1 is characterized in that, described sensing unit comprises:
Third part, an end of described third part has described the first electrode;
The 4th part, a described tetrameric end links to each other with the other end of described third part, and the described tetrameric other end has described the second electrode.
10. contactor control device as claimed in claim 9 is characterized in that, at least one is rectangle in described third part and described the 4th part.
11. contactor control device as claimed in claim 1 is characterized in that, described sensing unit comprises:
The 5th part;
Disjoint the 6th part and the 7th part, described the 6th part one end links to each other with an end of described the 5th part, one end of described the 7th part links to each other with the other end of described the 5th part, the other end of described the 6th part has described the first electrode, and the other end of described the 7th part has described the second electrode.
12. contactor control device as claimed in claim 11 is characterized in that, the length of described a plurality of sensing units differs from one another, and mutually nested between described a plurality of sensing unit.
13. contactor control device as claimed in claim 11, it is characterized in that, described substrate is rectangle, mutually vertical between the first side of described substrate and the Second Edge of described substrate, mutually vertical between described the 6th part and described the 5th part, and mutually vertical between described the 7th part and described the 5th part.
14. contactor control device as claimed in claim 11 is characterized in that, at least one is rectangle in described the 5th part, described the 6th part and described the 7th part.
15. contactor control device as claimed in claim 7 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 is horizontally disposed with or vertically arranges.
16. contactor control device as claimed in claim 1 is characterized in that, described substrate is rectangle, and is mutually vertical between the first side of described substrate and the Second Edge.
17. contactor control device as claimed in claim 1 is characterized in that, described a plurality of sensing units are positioned at same layer.
18. contactor control device as claimed in claim 2 is characterized in that, described the first detected value comprises the first charging detected value or the first discharge examination value, and described the second detected value comprises the second charging detected value or the second discharge examination value.
19. contactor control device as claimed in claim 1 is characterized in that, described touch-screen control chip comprises one or two capacitive detection module CTS.
20. a touch screen detection device is characterized in that, comprising:
Substrate; With
A plurality of disjoint sensing units, described a plurality of sensing unit is formed on the described substrate, and each of described a plurality of sensing units all has the first electrode and the second electrode that is oppositely arranged, and wherein, each first electrode all links to each other with a pin of touch screen controller with the second electrode.
21. touch screen detection device as claimed in claim 20 is characterized in that, described sensing unit is rectangle.
22. touch screen detection device as claimed in claim 20 is characterized in that, described sensing unit comprises:
A plurality of firsts and a plurality of parallel second portions, wherein, link to each other by described second portion between the adjacent described first, with the first groove and the second groove that forms a plurality of alternative arrangements, wherein, the opening direction of described a plurality of the first groove and described a plurality of the second grooves is opposite.
23. touch screen detection device as claimed in claim 20 is characterized in that, described sensing unit comprises:
Third part, an end of described third part has described the first electrode;
The 4th part, a described tetrameric end links to each other with the other end of described third part, and the described tetrameric other end has described the second electrode.
24. touch screen detection device as claimed in claim 20 is characterized in that, described sensing unit comprises:
The 5th part;
Disjoint the 6th part and the 7th part, described the 6th part one end links to each other with an end of described the 5th part, one end of described the 7th part links to each other with the other end of described the 5th part, the other end of described the 6th part has described the first electrode, and the other end of described the 7th part has described the second electrode.
25. touch screen detection device as claimed in claim 24 is characterized in that, the length of described a plurality of sensing units differs from one another, and mutually nested between described a plurality of sensing unit.
26. touch screen detection device as claimed in claim 24, it is characterized in that, described substrate is rectangle, mutually vertical between the first side of described substrate and the Second Edge of described substrate, mutually vertical between described the 6th part and described the 5th part, and mutually vertical between described the 7th part and described the 5th part.
27. touch screen detection device as claimed in claim 24, it is characterized in that, spacing between the 5th part of adjacent two sensing units is equal, and the spacing between the 6th part of adjacent two sensing units is equal, and the spacing between the 7th part of adjacent two sensing units equates.
28. touch screen detection device as claimed in claim 20 is characterized in that, described a plurality of sensing units are positioned at same layer.
29. a touch detecting method is characterized in that, may further comprise the steps:
The first electrode and/or the second electrode to sensing unit apply level signal, and wherein, when described sensing unit was touched, described level signal was charged to the self-capacitance that described sensing unit produces;
Whether detect in described a plurality of sensing unit one or part sensing unit is touched;
Be touched if detect in described a plurality of sensing unit one or part, then calculate the first electrode described in the corresponding sensing unit to the first resistance of described self-capacitance and described the second electrode proportionate relationship between the second resistance of described self-capacitance extremely; And
Determine touch location according to the proportionate relationship between described the first resistance and described the second resistance.
30. touch detecting method as claimed in claim 29, it is characterized in that, proportionate relationship between described the first resistance and described the second resistance is according to described self-capacitance charge/discharge the time, from described the first electrode and/or the second electrode detects the first detected value of acquisition and the proportionate relationship between the second detected value calculates.
31. touch detecting method as claimed in claim 30 is characterized in that, described the first detected value and described the second detected value are one or more in current detection value, self-capacitance detected value, level signal detected value and the charge variation amount.
32. touch detecting method as claimed in claim 29 is characterized in that, described sensing unit is rectangle, and described touch location is the touch location on first direction.
33. touch detecting method as claimed in claim 29 is characterized in that, described sensing unit comprises:
A plurality of firsts and a plurality of parallel second portions, wherein, link to each other by described second portion between the adjacent described first, with the first groove and the second groove that forms a plurality of alternative arrangements, wherein, the opening direction of described a plurality of the first groove and described a plurality of the second grooves is opposite.
34. such as claim 32 or 33 described touch detecting methods, it is characterized in that, also comprise:
The touch location of location positioning on second direction according to the described sensing unit that is touched.
35. touch detecting method as claimed in claim 34 is characterized in that, also comprises:
Determine described touch location according to the touch location on the described first direction and the touch location on the second direction.
36. touch detecting method as claimed in claim 29 is characterized in that, described sensing unit comprises:
Third part, an end of described third part has described the first electrode;
The 4th part, a described tetrameric end links to each other with the other end of described third part, and the described tetrameric other end has described the second electrode.
37. touch detecting method as claimed in claim 29 is characterized in that, described sensing unit comprises:
The 5th part;
Disjoint the 6th part and the 7th part, described the 6th part one end links to each other with an end of described the 5th part, one end of described the 7th part links to each other with the other end of described the 5th part, the other end of described the 6th part has described the first electrode, and the other end of described the 7th part has described the second electrode.
38. touch detecting method as claimed in claim 30 is characterized in that, described the first detected value comprises the first charging detected value or the first discharge examination value, and described the second detected value comprises the second charging detected value or the second discharge examination value.
39. touch detecting method as claimed in claim 38 is characterized in that, also comprises:
The first electrode and the second electrode to described sensing unit apply level signal so that described self-capacitance is charged;
Charge detection to obtain described the first charging detected value and the second charging detected value from described the first electrode and/or the second electrode.
40. touch detecting method as claimed in claim 38 is characterized in that, also comprises:
The first electrode or the second electrode to described sensing unit apply respectively level signal for twice so that described self-capacitance is carried out twice charging;
After each charging, charge detection to obtain described the first charging detected value and the second charging detected value from described the first electrode and/or the second electrode.
41. touch detecting method as claimed in claim 40, it is characterized in that, when the first electrode to described sensing unit applies respectively level signal for twice described self-capacitance is carried out twice when charging, in described twice charging once with described the second electrode grounding, another time connects described the second electrode and is high resistant;
When the second electrode to described sensing unit applies respectively level signal for twice described self-capacitance being carried out twice when charging, in described twice charging once with described the first electrode grounding, another time connects described the first electrode and is high resistant.
42. touch detecting method as claimed in claim 38 is characterized in that, also comprises:
The first electrode and the second electrode to described sensing unit apply level signal so that described self-capacitance is charged;
Control described the first electrode and/or described the second electrode grounding with to the discharge of described self-capacitance, and carry out discharge examination to obtain described the first discharge examination value and the second discharge examination value from described the first electrode and/or the second electrode.
43. touch detecting method as claimed in claim 38 is characterized in that, also comprises:
The first electrode or the second electrode to described sensing unit apply level signal so that described self-capacitance is charged;
Control respectively described the first electrode and described the second electrode grounding with to the discharge of described self-capacitance, and carry out discharge examination to obtain described the first discharge examination value and the second discharge examination value from described the first electrode and/or the second electrode respectively.
44. touch detecting method as claimed in claim 38 is characterized in that, also comprises:
The first electrode or the second electrode to described sensing unit apply level signal so that described self-capacitance is charged;
Control respectively described the first electrode or described the second electrode grounding with to the discharge of described self-capacitance, and carry out discharge examination to obtain described the first discharge examination value and the second discharge examination value from described the first electrode and the second electrode respectively.
45. a portable electric appts is characterized in that, comprises each described contactor control device such as claim 1-19.
46. a portable electric appts is characterized in that, comprises each described contactor control device such as claim 20-28.
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TW101214202U TWM454578U (en) 2011-07-26 2012-07-23 Touch screen detecting device, touch sensitive device, and portable electronic apparatus
TW101126426A TWI505163B (en) 2011-07-26 2012-07-23 Touch detecting method, touch screen detecting device, touch sensitive device, and portable electronic apparatus
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