CN102902436B - Touch-screen testing equipment and contactor control device - Google Patents
Touch-screen testing equipment and contactor control device Download PDFInfo
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- CN102902436B CN102902436B CN201110459449.0A CN201110459449A CN102902436B CN 102902436 B CN102902436 B CN 102902436B CN 201110459449 A CN201110459449 A CN 201110459449A CN 102902436 B CN102902436 B CN 102902436B
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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
- 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
Abstract
The present invention proposes a kind of Touch-screen testing equipment and contactor control device, and this contactor control device comprises: substrate; Multiple disjoint sensing unit, described multiple sensing unit is formed on described substrate, and each of described multiple sensing unit all has the first electrode and the second electrode that are oppositely arranged; With touch-screen control chip.The embodiment of the present invention effectively can also improve the to-noise ratio of circuit, reduces circuit noise, improves the induction linearity.
Description
Technical field
The present invention relates to electronic device design and manufacturing technology field, particularly a kind of Touch-screen testing equipment 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 contactor control device, comprises Touch-screen testing equipment and touch-screen control chip.Described touch-screen detects the multiple disjoint sensing unit comprising substrate and formed on the substrate, and wherein, each described sensing unit comprises: Part I, disjoint Part II and Part III, described Part II one end is connected with one end of described Part I, one end of described Part III is connected with the other end of described Part I, and the other end of described Part II has the first electrode, the other end of described Part III has the second electrode, wherein, each first electrode and the second electrode are all connected with the corresponding pin of touch-screen control chip, a part of pin in described touch-screen control chip is connected with the first electrode of described multiple sensing unit, another part pin in described touch-screen control chip is connected with the second electrode of described multiple sensing unit, and described touch-screen control chip applies level signal to the first electrode of described multiple sensing unit and/or the second electrode, the self-capacitance that described level signal produces to described sensing unit when sensing unit is touched charges, and described touch-screen control chip is when detecting in described multiple sensing unit one or part is touched, calculate the first electrode described in the sensing unit that is touched to the first resistance of described self-capacitance and described second electrode to the second resistance of described self-capacitance between proportionate relationship, and calculate touch point coordinate according to described proportionate relationship and the described sensing unit that is touched.
Embodiment of the present invention second aspect also proposed a kind of Touch-screen testing equipment, comprising: substrate; With the multiple disjoint sensing unit formed on the substrate, wherein, each described sensing unit comprises: Part I; Disjoint Part II and Part III, described Part II one end is connected with one end of described Part I, one end of described Part III is connected with the other end of described Part I, and the other end of described Part II has the first electrode, the other end of described Part III has the second electrode, wherein, each first electrode and the second electrode are all connected with the corresponding pin of touch-screen control chip.
The embodiment of the present invention third aspect also proposed a kind of portable electric appts, comprises contactor control device as above or Touch-screen testing equipment.
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.
In addition, the 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.
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.In addition, because any one all can be the rectangle of regular shape in the Part I of the embodiment of the present invention, Part II and Part III, therefore relative to irregular shapes such as current rhombus or triangles, also the linearity can be improved further.
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, finger or other touch objects then can form self-capacitance with sensing unit, therefore the present invention can be charged to this self-capacitance by the level signal applied, and according to the proportionate relationship determination touch location between the first resistance and the second resistance.Such as in one embodiment of the invention, proportionate relationship between first resistance and the second resistance, according to when to the charging of described self-capacitance and/or electric 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 the first detected value produced when the first electrode and/or this self-capacitance of the second electrode detection charge and/or discharge 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.
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 charging and/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.And, 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 an embodiment of the present invention, also proposed a kind of portable electric appts, comprise contactor control device as above.
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 a is embodiment of the present invention Touch-screen testing equipment structural drawing;
Fig. 4 b is another embodiment of the present invention Touch-screen testing equipment structural drawing;
Fig. 5 is the schematic diagram of the sensing unit of embodiment of the present invention when being touched; With
Fig. 6 is the contactor control device schematic diagram of one embodiment of the invention.
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, be equivalent to this sensing unit is divided into two resistance, 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; Anyway, 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, resistance R1 and R2 is detected by various ways, one or more such as by detecting in the current detection value of the first electrode and the second electrode, self-capacitance detected value, level signal detected value and charge variation amount, thus obtain resistance R1 and R2 according to these detected values.In addition, in an embodiment of the present invention, detection can be carried out when charging (obtaining the first charging detected value and the second charging detected value), also can carry out (obtaining the first discharge examination value and the second discharge examination value) when discharging.
In addition, the detection carried out when charging and discharging can adopt various ways.But it should be noted that, a step is had at least to carry out the first electrode and the second electrode in charging, electric discharge or detection, two detected values of difference between reaction first resistance and the second resistance can be obtained like this, i.e. the first detected value and the second detected value.That is, need electric current through the first resistance and the second resistance when charging, discharging or detecting, the first detected value detected 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 the situation simultaneously to the first electrode and the second electrode charge), and twice detection.In certain embodiments, also twice electric discharge may be carried out.Be all carry out twice charging and twice detection below in an example, repeat no more below in an example.It should be noted that at this, carry out a kind of scheme that twice charging and twice detection are only the embodiment of the present invention, algorithm is relatively simple.But the number of times that those skilled in the art also can increase charging according to above-mentioned thought and detect, such as can carry out three chargings and detect, calculate the first resistance according to primary charging detected value and secondary charging detected value afterwards, then calculate the second resistance according to primary charging detected value and the charging detected value of third time.
Particularly, the present invention includes but be not limited to following several metering system and detect:
1, first the first electrode to sensing unit and the second electrode apply level signal to charge (if this sensing unit is touched, will produce self-capacitance) to self-capacitance; Then carry out charging from the first electrode and/or the second electrode and detect to obtain the first charging detected value and the second charging detected value.In this embodiment, because charging is carried out from the first electrode and the second electrode, therefore both can detect from the first electrode for detection, and also can detect from the second electrode, or also can detect respectively from the first electrode and the second electrode.
Also it should be noted that, in this embodiment, can carry out the charging of the first electrode and the second electrode simultaneously, also can carry out respectively, such as apply identical level signal to charge to self-capacitance at the first electrode and the second electrode simultaneously, in other embodiments, the level signal that the first electrode and the second electrode apply also can be different; Or, also first can apply a level signal on the first electrode, apply same level signal or another level signal more on the second electrode afterwards.Similarly, both can carry out when detecting simultaneously, also can carry out respectively.In the examples below, charging, electric discharge or detection all can be carried out simultaneously, or carry out respectively, do not repeat them here.
2, level signal is applied respectively for twice to carry out twice charging to described self-capacitance to the first electrode of described sensing unit or the second electrode; Then after each charging, carry out charging from described first electrode and/or the second electrode and detect to obtain described first charging detected value and the second charging detected value.In this embodiment, because charging is carried out from the first electrode or the second electrode, therefore need when detecting to detect respectively from the first electrode and the second electrode, wherein, detection can be carried out simultaneously, also can carry out respectively.
In addition, in an embodiment of the present invention, twice charging can also be carried out at the first electrode, and carry out twice detection from the first electrode, or, carry out twice charging from the second electrode, carry out twice detection at the second electrode.As long as, when twice charging, respectively by another electrode ground connection or connect high resistant to change the state of another electrode.Such as when the first electrode to sensing unit respectively twice apply level signal to carry out twice charging to self-capacitance time, wherein, in twice charging once by described second electrode ground connection, described second electrode connects as high resistant by another time; When the second electrode to sensing unit respectively twice apply level signal to carry out twice charging to self-capacitance time, in twice charging once by described first electrode ground connection, described first electrode connects as high resistant by another time.
Even carried out twice charging at the first electrode like this, due to the change of the second electrode condition, also twice detection can be carried out at the first electrode, to obtain first detected value and the second detected value that can react proportionate relationship between the first resistance R1 and the second resistance R2.
3, level signal is applied to charge to self-capacitance to the first electrode of sensing unit and the second electrode; Then the first electrode and/or the second electrode ground connection is controlled to discharge to self-capacitance; Discharge examination is carried out to obtain described first discharge examination value and the second discharge examination value afterwards from the first electrode and/or the second electrode.In this embodiment, owing to carrying out from the first electrode and the second electrode self-capacitance charging, therefore electric discharge or detection just can be carried out from the first electrode and/or the second electrode.Particularly, such as, can apply level signal to charge to self-capacitance to the first electrode and the second electrode simultaneously, or also can apply during difference.When discharging, twice electric discharge can all by the first electrode ground connection, or all by the second electrode ground connection.
4, level signal is applied to charge to self-capacitance to the first electrode of sensing unit or the second electrode; Then the first electrode and the second electrode ground connection is controlled respectively to discharge to self-capacitance; Discharge examination is carried out to obtain the first discharge examination value and the second discharge examination value respectively afterwards from the first electrode and/or the second electrode.In this embodiment, owing to carrying out from the first electrode and the second electrode self-capacitance electric discharge, 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 use the first electrode, and by the second electrode ground connection or connect as high resistant respectively.Similarly, twice charging also can all use the second electrode, and by the first electrode ground connection or connect as high resistant respectively.
5, level signal is applied to charge to self-capacitance to the first electrode of sensing unit or the second electrode; Then control the first electrode or the second electrode ground connection respectively with to self-capacitance electric 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, carry out from the first electrode and the second electrode owing to detecting self-capacitance, therefore 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 use the first electrode, and by the second electrode ground connection or connect as high resistant respectively.Similarly, twice charging also can all use the second electrode, and by the first electrode ground connection or connect as high resistant respectively.
Or, on the basis of above-described embodiment, one-time detection can also be carried out to obtain the first charging detected value when charging, carry out second time to detect when discharging to obtain the second discharge examination value, then obtain the proportionate relationship between the first resistance and the second resistance according to the first charging detected value and the second discharge examination value.
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.
As can be seen from foregoing description, have a variety of change for above-mentioned charging of the present invention and detection mode, but core of the present invention is exactly according to the relation between the first resistance and the second resistance, such as proportionate relationship or other relations determine the position of touch point.Further, the relation between this first resistance and second resistance needs to be detected by the charging of self-capacitance and/or electric discharge.If sensing unit is not touched, then would not produce self-capacitance with hand, therefore detect that the data of self-capacitance can be very little, do not meet the Rule of judgment touched, constantly can scan in this embodiment of the present invention, just start after waiting for finger touch to sensing unit to calculate, do not repeat them here.
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.
It also should be noted that, above-mentioned detection mode is only optimal ways more of the present invention, and those skilled in the art also can carry out expanding or revising according to above-mentioned thought, and these all should be included within protection scope of the present invention.
As shown in fig. 4 a, be embodiment of the present invention Touch-screen testing equipment structural drawing.This contactor control device comprises substrate 100, multiple disjoint sensing unit 200.And each of multiple sensing unit 200 all has the first electrode 210 and the second electrode 220.In an embodiment of the present invention, substrate 100 is single layer substrate.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 I 230, disjoint Part II 240 and Part III 250.Preferably, Part I 230 is parallel with the first limit 110 of substrate 100, Part II 240 is parallel with the Second Edge 120 of substrate 100 with Part III 250, and Part II 240 one end is connected with one end of Part I 230, and one end of Part III 250 is connected with the other end of Part I 230.The other end of the Part II 240 of sensing unit 200 has the first electrode 210, and the other end of Part III 250 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 fig. 4 a, 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. 4 a arranges sensing unit.In one embodiment of the invention, the Part I 230 of each sensing unit 200 is parallel with the Part I 230 of other sensing units 200, the Part II 240 of each sensing unit 200 is parallel with the Part II 240 of other sensing units 200, and the Part III 250 of each sensing unit 200 is parallel with the Part III 250 of other sensing units 200.In one embodiment of the invention, in the Part I 230 of sensing unit 200, Part II 240 and Part III 250, at least one is rectangle, and preferably, Part I 230, Part II 240 and Part III 250 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 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.In addition, the 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.
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 any one all can be the rectangle of regular shape in the Part I of the embodiment of the present invention, Part II and Part III, 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 II 240 of each sensing unit 200 is equal with Part III 250 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 II 240 and Part I 230, mutually vertical between Part III 250 and Part I 230.
In one embodiment of the invention, spacing between the Part I 230 of adjacent two sensing units 200 is equal, spacing between the Part II 240 of adjacent two sensing units 200 is equal, and the spacing between the Part III 250 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 I 230 of adjacent two sensing units 200 also can be unequal, or the spacing between the Part II 240 of adjacent two sensing units 200 also can be unequal, as shown in Figure 4 b.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 positioned at same layer, therefore only needs one deck ITO, thus while guarantee precision, greatly reduces manufacturing cost.
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 fig. 4 a, central shaft Y perpendicular to Part I 230, thus is more conducive to improving precision.
As shown in fig. 4 a, 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. 4 a is the present invention's preferably embodiment, it can obtain larger coverage rate, but other embodiments of the present invention can carry out some equivalent changes to Fig. 4 a, and such as Part II 240 and Part III 250 also can be uneven.
As shown in Figure 5, be the schematic diagram when sensing unit of the embodiment of the present invention is touched.As can be seen from Figure 5, 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 I 230 is 4 unit lengths, and the length of sensing unit Part II 240 and Part III 250 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.
As can be seen from the above example of Fig. 5, account form of the present invention is very simple, therefore, it is possible to greatly improve the reaction velocity of touch-screen detection.As shown in Figure 6, be the contactor control device schematic diagram of one embodiment of the invention.This contactor control device comprises the Touch-screen testing equipment 300 and touch-screen control chip 400 that are made up of substrate 100 and multiple disjoint sensing unit 200.Wherein, a part of pin in touch-screen control chip 400 is connected with the first electrode 210 of multiple sensing unit 200, and another part pin in touch-screen control chip 400 is connected with the second electrode 220 of multiple sensing unit 200.Touch-screen control chip 400 applies level signal to the first electrode 210 of multiple sensing unit 200 and/or the second electrode 220, the self-capacitance that this level signal produces to sensing unit 200 when sensing unit 200 is touched charges, and touch-screen control chip 400 is when detecting in multiple sensing unit one or part is touched, calculate the proportionate relationship between the first resistance of the first electrode 210 to self-capacitance in the sensing unit 200 be touched and the second resistance of the second electrode 220 to self-capacitance, and calculate touch point coordinate according to described proportionate relationship and the sensing unit 200 that is touched.Similarly, this charging, electric discharge and detection can be carried out also can carrying out respectively simultaneously, do not repeat them here.Such as, with reference to shown in Fig. 5, outermost sensing unit is touched, and touch-screen control chip 400 obtains the first resistance of outermost sensing unit and the proportionate relationship of the second resistance, positional information due to outermost sensing unit has been stored in touch-screen control chip 400, certainly also can be stored in external storer, therefore touch-screen control chip 400 just can search the positional information of outermost sensing unit according to this proportionate relationship, thus determines touch point coordinate.
In an embodiment of the present invention, usual finger or other objects can touch multiple sensing unit, now touch-screen control chip 400 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 addition, the first detected value and the second detected value can be in current detection value, self-capacitance detected value, level signal detected value and charge variation amount one or more, as long as the difference between the first resistance and the second resistance can be reacted.In one embodiment of the invention, two capacitive detection module CTS are comprised among touch-screen control chip 400 to detect from the first electrode 210 and the second electrode 220 pairs of sensing units 200 simultaneously.Because these two capacitive detection module CTS can share some devices, the overall power of chip therefore also can not be increased.
In another embodiment of the present invention, a capacitive detection module CTS also can be only adopted to detect from the first electrode 210 and the second electrode 220 pairs of sensing units 200 successively.Touch-screen control chip 400 is according to the proportionate relationship determination touch location between the first resistance and the second resistance.
In one embodiment of the invention, proportionate relationship between first resistance and the second resistance, according to when to self-capacitance charging and/or electric discharge, is carried out detecting from the first electrode and/or the second electrode the proportionate relationship between the first detected value and the second detected value obtained and is calculated.
In one embodiment of the invention, the first detected value and the second detected value are one or more in current detection value, self-capacitance detected value, level signal detected value and charge variation amount.
In one embodiment of the invention, the first detected value comprises the first charging detected value or the first discharge examination value, and described second detected value comprises the second charging detected value or the second discharge examination value.
In one embodiment of the invention, touch-screen control chip 400 applies level signal with to self-capacitance charging to the first electrode 210 of sensing unit 200 and the second electrode 220, and touch-screen control chip 400 carries out charging from the first electrode 210 and/or the second electrode 220 and detects and to charge detected value to obtain the first charging detected value and second.
In one embodiment of the invention, touch-screen control chip 400 applies level signal for twice to carry out twice charging to self-capacitance respectively to the first electrode 210 of sensing unit 200 or the second electrode 220, and after each charging, touch-screen control chip 400 carries out charging from the first electrode 210 and/or the second electrode 220 and detects and to charge detected value to obtain the first charging detected value and second.
In one embodiment of the invention, when the first electrode 210 from touch-screen control chip 400 to sensing unit 200 respectively twice apply level signal to carry out twice charging to self-capacitance time, in twice charging once by the second electrode 220 ground connection, the second electrode 220 connects as high resistant by another time; Or, when the second electrode 220 from touch-screen control chip 400 to sensing unit 200 respectively twice apply level signal to carry out twice charging to self-capacitance time, in twice charging once by the first electrode 210 ground connection, the first electrode 210 connects as high resistant by another time.
In one embodiment of the invention, touch-screen control chip 400 applies level signal to charge to self-capacitance to the first electrode 210 of sensing unit 200 and the second electrode 220, touch-screen control chip 400 controls the first electrode 210 and/or the second electrode 220 ground connection with to self-capacitance electric discharge, and touch-screen control chip 400 carries out discharge examination to obtain described first discharge examination value and the second discharge examination value from the first electrode 210 and/or the second electrode 220.
In one embodiment of the invention, touch-screen control chip 400 applies level signal to charge to self-capacitance to the first electrode 210 of sensing unit 200 or the second electrode 220, touch-screen control chip 400 controls the first electrode 210 and the second electrode 220 ground connection respectively with to self-capacitance electric discharge, and touch-screen control chip 400 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 400 applies level signal to charge to self-capacitance to the first electrode 210 of sensing unit 200 or the second electrode 220, touch-screen control chip 400 controls the first electrode 210 or the second electrode 220 ground connection respectively with to self-capacitance electric discharge, and touch-screen control chip 400 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, touch-screen control chip 400 comprises one or two CTS (capacitive detection module).
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, finger or other touch objects then can form self-capacitance with sensing unit, therefore the present invention can be charged to this self-capacitance by the level signal applied, and according to the proportionate relationship determination touch location between the first resistance and the second resistance.Such as in one embodiment of the invention, proportionate relationship between first resistance and the second resistance, according to when to the charging of described self-capacitance and/or electric 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 the first detected value produced when the first electrode and/or this self-capacitance of the second electrode detection charge and/or discharge 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.
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 charging and/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.And, 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 (32)
1. a contactor control device, is characterized in that, comprising:
Touch-screen testing equipment, described Touch-screen testing equipment comprises:
Substrate; With
Form multiple sensing units on the substrate, described multiple sensing unit mutually disjoints, wherein,
Each sensing unit comprises:
Part I;
Disjoint Part II and Part III, described Part II one end is connected with one end of described Part I, one end of described Part III is connected with the other end of described Part I, the other end of described Part II has the first electrode, and the other end of described Part III has the second electrode; And
Touch-screen control chip, a part of pin in described touch-screen control chip is connected with the first electrode of described multiple sensing unit, another part pin in described touch-screen control chip is connected with the second electrode of described multiple sensing unit, and described touch-screen control chip applies level signal to the first electrode of described multiple sensing unit and/or the second electrode, the self-capacitance charging that described level signal one or part in described multiple sensing unit produce when being touched, and described touch-screen control chip is when detecting in described multiple sensing unit one or part is touched, calculate the first electrode described in be touched or part sensing unit to the first resistance of described self-capacitance and described second electrode to the second resistance of described self-capacitance between proportionate relationship, and calculate touch point coordinate according to described proportionate relationship and of being touched or part sensing unit.
2. contactor control device as claimed in claim 1, it is characterized in that, the length of described multiple sensing unit is different from each other, and mutually nested between described multiple sensing unit.
3. contactor control device as claimed in claim 1, it is characterized in that, the Part I of described multiple sensing unit is parallel to each other, and the Part II of described multiple sensing unit is parallel to each other and Part III that is described multiple sensing unit is parallel to each other.
4. contactor control device as claimed in claim 3, it is characterized in that, described Part I is parallel with the first limit of described substrate, and described Part II is parallel with the Second Edge of described substrate with described Part III.
5. contactor control device as claimed in claim 4, it is characterized in that, the Part II of described multiple sensing unit is equal with Part III length.
6. contactor control device as claimed in claim 4, it is characterized in that, described substrate is rectangle, mutually vertical between described first limit and described Second Edge, mutually vertical between described Part II and described Part I, and mutually vertical between described Part III and described Part I.
7. contactor control device as claimed in claim 4, it is characterized in that, spacing between the Part I of adjacent two sensing units is equal, and the spacing between the Part II of adjacent two sensing units is equal, and the spacing between the Part III of adjacent two sensing units is equal.
8. contactor control device as claimed in claim 4, it is characterized in that, described multiple sensing unit is positioned at same layer.
9. contactor control device as claimed in claim 4, is characterized in that, described multiple sensing unit is symmetrical relative to the central shaft of described substrate, and described central axis is in described Part I.
10. contactor control device as claimed in claim 1, it is characterized in that, in described Part I, described Part II and described Part III, at least one is rectangle.
11. contactor control devices as claimed in claim 1, it is characterized in that, proportionate relationship between described first resistance and described second resistance, according to when to the charging of described self-capacitance and/or electric 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.
12. contactor control devices as claimed in claim 11, is characterized in that, described first detected value and described second detected value are one or more in current detection value, self-capacitance detected value, level signal detected value and charge variation amount.
13. contactor control devices as claimed in claim 11, it is characterized in that, described first detected value comprises the first charging detected value or the first discharge examination value, described second detected value comprises the second charging detected value or the second discharge examination value.
14. contactor control devices as claimed in claim 13, it is characterized in that, described touch-screen control chip applies level signal to charge to described self-capacitance to the first electrode of described sensing unit and the second electrode, and described touch-screen control chip carries out charging from described first electrode and/or the second electrode and detects and to charge detected value to obtain described first charging detected value and second.
15. contactor control devices as claimed in claim 13, it is characterized in that, described touch-screen control chip applies level signal for twice to carry out twice charging to described self-capacitance respectively to the first electrode of described sensing unit or the second electrode, and after each charging, described touch-screen control chip carries out charging from described first electrode and/or the second electrode and detects and to charge detected value to obtain described first charging detected value and second.
16. contactor control devices as claimed in claim 13, it is characterized in that, when the first electrode from described touch-screen control chip to described sensing unit respectively twice apply level signal to carry out twice charging to described self-capacitance time, in described twice charging once by described second electrode ground connection, described second electrode connects as high resistant by another time; And
When the second electrode from described touch-screen control chip to described sensing unit respectively twice apply level signal to carry out twice charging to described self-capacitance time, in described twice charging once by described first electrode ground connection, described first electrode connects as high resistant by another time.
17. contactor control devices as claimed in claim 13, it is characterized in that, described touch-screen control chip applies level signal to charge to described self-capacitance to the first electrode of described sensing unit and the second electrode, described touch-screen control chip described first electrode of control and/or described second electrode ground connection are to discharge to described self-capacitance, and described touch-screen control chip carries out discharge examination to obtain described first discharge examination value and the second discharge examination value from described first electrode and/or the second electrode.
18. contactor control devices as claimed in claim 13, it is characterized in that, described touch-screen control chip applies level signal to charge to described self-capacitance to the first electrode of described sensing unit or the second electrode, described touch-screen control chip controls described first electrode and described second electrode ground connection respectively to discharge to described self-capacitance, and described touch-screen control chip carries out discharge examination to obtain described first discharge examination value and the second discharge examination value from described first electrode and/or the second electrode respectively.
19. contactor control devices as claimed in claim 13, it is characterized in that, described touch-screen control chip applies level signal to charge to described self-capacitance to the first electrode of described sensing unit or the second electrode, described touch-screen control chip controls described first electrode or described second electrode ground connection respectively to discharge to described self-capacitance, and described touch-screen control chip carries out discharge examination to obtain described first discharge examination value and the second discharge examination value from described first electrode and the second electrode respectively.
20. contactor control devices as claimed in claim 11, it is characterized in that, described touch-screen control chip comprises one or two capacitive detection module CTS.
21. 1 kinds of Touch-screen testing equipments, is characterized in that, comprising:
Substrate;
Form multiple sensing units on the substrate, described multiple sensing unit mutually disjoints, and wherein, each sensing unit comprises:
Part I;
Disjoint Part II and Part III, described Part II one end is connected with one end of described Part I, one end of described Part III is connected with the other end of described Part I, the other end of described Part II has the first electrode, and the other end of described Part III has the second electrode; And
Touch-screen control chip, a part of pin in described touch-screen control chip is connected with the first electrode of described multiple sensing unit, and another part pin in described touch-screen control chip is connected with the second electrode of described multiple sensing unit.
22. Touch-screen testing equipments as claimed in claim 21, it is characterized in that, the length of described multiple sensing unit is different from each other, and mutually nested between described multiple sensing unit.
23. Touch-screen testing equipments as claimed in claim 21, it is characterized in that, the Part I of described multiple sensing unit is parallel to each other, and the Part II of described multiple sensing unit is parallel to each other and Part III that is described multiple sensing unit is parallel to each other.
24. Touch-screen testing equipments as claimed in claim 23, it is characterized in that, described Part I is parallel with the first limit of described substrate, and described Part II is parallel with the Second Edge of described substrate with described Part III.
25. Touch-screen testing equipments as claimed in claim 24, it is characterized in that, the Part II of each described sensing unit is equal with Part III length.
26. Touch-screen testing equipments as claimed in claim 24, it is characterized in that, described substrate is rectangle, mutually vertical between described first limit and described Second Edge, mutually vertical between described Part II and described Part I, and mutually vertical between described Part III and described Part I.
27. Touch-screen testing equipments as claimed in claim 24, it is characterized in that, spacing between the Part I of adjacent two sensing units is equal, and the spacing between the Part II of adjacent two sensing units is equal, and the spacing between the Part III of adjacent two sensing units is equal.
28. Touch-screen testing equipments as claimed in claim 24, it is characterized in that, described multiple sensing unit is positioned at same layer.
29. Touch-screen testing equipments as claimed in claim 24, is characterized in that, described multiple sensing unit is symmetrical relative to the central shaft of described substrate, and described central axis is in described Part I.
30. Touch-screen testing equipments as claimed in claim 21, it is characterized in that, in described Part I, described Part II and described Part III, at least one is rectangle.
31. 1 kinds of portable electric appts, is characterized in that, comprise the contactor control device as described in any one of claim 1-20.
32. 1 kinds of portable electric appts, is characterized in that, comprise the Touch-screen testing equipment as described in any one of claim 21-30.
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| TW101125847A TWI494833B (en) | 2011-07-26 | 2012-07-18 | Touch sensitive device and portable electronic apparatus |
| TW101213854U TWM450007U (en) | 2011-07-26 | 2012-07-18 | Touch sensitive device and portable electronic apparatus |
| PCT/CN2012/079223 WO2013013636A1 (en) | 2011-07-26 | 2012-07-26 | Touch detecting assembly, touch sensitive device and portable electronic apparatus |
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| CN201110459449.0A CN102902436B (en) | 2011-07-26 | 2011-12-31 | Touch-screen testing equipment and contactor control device |
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