CN202267944U - Touch screen detecting device and touch control device - Google Patents
Touch screen detecting device and touch control device Download PDFInfo
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- CN202267944U CN202267944U CN2011202671093U CN201120267109U CN202267944U CN 202267944 U CN202267944 U CN 202267944U CN 2011202671093 U CN2011202671093 U CN 2011202671093U CN 201120267109 U CN201120267109 U CN 201120267109U CN 202267944 U CN202267944 U CN 202267944U
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Abstract
The utility model provides a touch screen detecting device and a touch control device. The touch control device comprises a substrate, a plurality of non-intersected sensing units and a detecting module. The sensing units are formed on the substrate, and each sensing unit comprises a first electrode and a second electrode, which are oppositely arranged. The signal to noise ratio of a circuit can be improved effectively, circuit noise can be reduced, and sensing linearity can be improved.
Description
Technical field
The utility model relates to electronic device design and manufacturing technology field, particularly a kind of 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), and minority's business markets such as industrial computer expand to mobile phone rapidly; PDA (personal digital assistant), GPS (GPS), PMP (MP3; Even mass consumption electronic applications such as panel computer MP4 etc.).Be used for touch-screen and have that touch control operation is simple, convenient, the advantage of hommization, so touch-screen is expected to become the best interface of human-computer interaction and in portable set, has obtained widespread use rapidly.
Capacitance touch screen is divided into two types of self-capacitance and mutual capacitance 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 ', and its detection principle is that X axle and Y axle are scanned respectively, has exceeded preset range if detect the capacitance variations of certain point of crossing, then with this point of crossing as touch coordinate.Though 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,, also can cause structure and cost significantly to increase, and diamond structure the coordinate drift can occur under the very little situation of capacitance change, influenced greatly by external interference owing to adopt bilayer screen.
As shown in Figure 2, 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 '.It detects principle is single-ended detection, and promptly single self-capacitance module detects.Though this self-capacitance touch screen structure is more simple, the capacitive sensing to screen is not optimized, and capacitance change is little, thereby causes signal to noise ratio (S/N ratio) not enough.In addition, the unreasonable coordinate Calculation that also caused of this self-capacitance touch-screen figure squints, and the linearity is good inadequately.
In this appearance formula touch-screen, the line of induction is to be made into subtriangular ring-type by conductive material.Being placed in the geometry to reverse the line of induction of two vicinities end to end of the line of induction placed relatively.The width of the line of induction and the space between the line of induction have determined needed number of electrodes in the given area.And the quantity of the line of induction will influence relatively between complexity and the available resolution of fixed point of putting position.Simultaneously, fixed point resolution also can receive the influence of line of induction edge shape.As shown in Figure 2; Because the face that people's finger 600 ' touches on the screen is an ellipse, and exists the influence of a slope in the design of figure, analyze from the physics angle; Oval mobile on screen; The part area that triangle sensing unit 400 is capped can not become a stable linear change, and is same, and the inductance capacitance that is capped part changes can not become a stable linearity yet.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 factor affecting 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 influences of Vcom level signal forms serious disturbance 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.
The utility model content
The purpose of the utility model 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.
The utility model embodiment first aspect has proposed a kind of contactor control device, comprising: substrate; A plurality of disjoint sensing units, said a plurality of sensing units are formed on the said substrate, and each of said a plurality of sensing units all has first electrode and second electrode; And detection module; Said detection module respectively with said a plurality of sensing units in each first electrode link to each other with second electrode; Said detection module applies level signal to first electrode and/or second electrode of said a plurality of sensing units; The self-capacitance charging that said level signal produces to said sensing unit when sensing unit is touched; And said detection module one or part when being touched in detecting said a plurality of sensing unit; Calculate first resistance of first electrode described in the corresponding sensing unit to said self-capacitance and the proportionate relationship between said second electrode to second resistance of said self-capacitance; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the said sensing unit that is touched according to the proportionate relationship between said first resistance and said second resistance.
The utility model embodiment second aspect has also proposed a kind of touch screen detection device, comprising: substrate; With a plurality of disjoint sensing units; Said a plurality of sensing unit is formed on the said substrate; And each of said a plurality of sensing units all has first electrode and second electrode that is oppositely arranged, and wherein, each first electrode all links to each other with a pin of touch screen controller with second electrode.
The utility model embodiment third aspect has also proposed a kind of contactor control device, comprising: touch screen detection device, said touch screen detection device are aforesaid touch screen detection device; Touch screen controller; A part of pin in the said touch screen controller links to each other with first electrode of said a plurality of sensing units; Another part pin in the said touch screen controller links to each other with second electrode of said a plurality of sensing units; And said touch screen controller applies level signal to first electrode and/or second electrode of said a plurality of sensing units; The self-capacitance charging that said level signal produces to said sensing unit when sensing unit is touched; And said touch screen controller one or part when being touched in detecting said a plurality of sensing unit, first resistance that calculates first electrode described in the corresponding sensing unit to said self-capacitance and said second electrode be the proportionate relationship between second resistance of said self-capacitance extremely; Host computer; Said host computer receives first resistance of said touch screen controller transmission and the proportionate relationship between second resistance; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the said sensing unit that is touched according to the proportionate relationship between said first resistance and said second resistance.
The utility model embodiment applies level signal through 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 utility model can charge to this self-capacitance through the level signal that applies, and confirms the touch location on first direction according to the proportionate relationship between first resistance and second resistance.For example in an embodiment of the utility model; Proportionate relationship between first resistance and second resistance is according to said self-capacitance charge/discharge the time, from said first electrode and/or second electrode detects first detected value of acquisition and the proportionate relationship between second detected value calculates.First detected value and second detected value that produce during therefore from first electrode and/or this self-capacitance charge/discharge of second electrode detection.Like this, just can react the position that the touch point is positioned at this sensing unit, thereby further confirm the position of touch point at touch-screen through first detected value and second detected value.
The utility model embodiment has proposed a kind of self-capacitance detection mode of novelty; When sensing unit is touched; The touch point just can be divided into two resistance with this sensing unit, thereby is carrying out considering when self-capacitance detects that these two resistance just can confirm the position of touch point on this sensing unit.The utility model embodiment's is simple in structure; And for a sensing unit; Can carry out charge or discharge from its first electrode and/or 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 squint.In addition, the property that the utility model embodiment can also effectively the improve circuit ratio of making an uproar reduces circuit noise, improves the induction linearity.In addition; The contactor control device of the utility model embodiment is not influenced by mutual capacitance, to water not reaction fully, and in testing process because the sensing unit that is touched is charged; Therefore wherein can produce little electric current; Can eliminate of the influence of Vcom level signal well, therefore can correspondingly eliminate screenmask layer and concerned process steps, thereby can when having strengthened antijamming capability, further reduce cost the self-capacitance of sensing unit generation in the touch-screen.
In the embodiment of the utility model, a kind of portable electric appts has also been proposed, comprise aforesaid contactor control device.
Aspect that the utility model is additional and advantage part in the following description provide, and part will become obviously from the following description, or recognize through the practice of the utility model.
Description of drawings
Above-mentioned and/or additional aspect of the utility model and advantage are from obviously with 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 is the structural drawing of another kind of self-capacitance touch-screen common in the prior art;
Fig. 3 is the detection principle schematic of the utility model embodiment contactor control device;
Fig. 4 is the touch detecting method process flow diagram of the utility model embodiment;
Fig. 5 is the contactor control device synoptic diagram of an embodiment of the utility model;
Fig. 6 is the contactor control device synoptic diagram of another embodiment of the utility model;
Fig. 7 is the sensing unit structural drawing of the utility model preferred embodiment.
Embodiment
Describe the embodiment of the utility model below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the utility model, and can not be interpreted as restriction the utility model.
The utility model embodiment has proposed a kind of self-capacitance detection mode of novelty; When sensing unit is touched; The touch point can be divided into two resistance with this sensing unit, is carrying out considering when self-capacitance detects that these two resistance just can confirm the position of touch point on this sensing unit.As shown in Figure 3, be the detection principle schematic of the utility model embodiment 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 touch point position.For example, as scheme saidly, when touch point and first electrode were nearer, then resistance R 1 was just less, and resistance R 2 is just bigger; Anyway, when touch point and second electrode were nearer, then resistance R 1 was just bigger, and resistance R 2 is just less.Therefore, the utility model is through just confirming the position of touch point on this sensing unit to the detection of resistance R 1 and R2.In the embodiment of the utility model; Can detect resistance R 1 and R2 in several ways; For example can be through in the current detection value, self-capacitance detected value, level signal detected value and the change in electrical charge amount that detect first electrode and second electrode one or more, thus resistance R 1 and R2 obtained according to these detected values.In addition, in the embodiment of the utility model, detection can be carried out (obtaining the first charging detected value and the second charging detected value) when charging, also can when discharge, carry out (obtaining the first discharge examination value and the second discharge examination value).In addition, the detection of when charging and discharge, carrying out can be adopted multiple mode.But need to prove; Have at least a step that first electrode and second electrode are carried out in charging, discharge or the detection; Can obtain to react two detected values of difference between first resistance and second resistance like this, i.e. first detected value and second detected value.That is to say that when charging, discharge or detection, need electric current through first resistance and second resistance, detected like this first detected value and second detected value can react the difference between first resistance and second resistance.In the embodiment of the utility model, need fill twice electricity (comprising simultaneously situation) usually to first electrode and the charging of second electrode, 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 that at this carry out a kind of scheme that twice charging and twice detection only are the utility model embodiment, algorithm is relatively simple.Yet those skilled in the art also can increase the number of times of charging and detection according to above-mentioned thought; For example can carry out three chargings and detection; Calculate first resistance according to primary charging detected value and secondary charging detected value afterwards, calculate second resistance according to primary charging detected value and charging detected value for the third time again.
Particularly, the utility model includes but not limited to that following several kinds of metering systems detect:
1, elder generation applies level signal with self-capacitance is charged (will produce self-capacitance if this sensing unit is touched) to 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 first electrode and/or second electrode.In this embodiment,, therefore for detecting, both can detect, also can detect, perhaps also can detect respectively from first electrode and second electrode from second electrode from first electrode because charging is carried out from first electrode and second electrode.Also need to prove; In this embodiment; Charging to first electrode and second electrode can be carried out simultaneously, also can carry out respectively, for example applies level signal same simultaneously so that self-capacitance is charged at first electrode and second electrode; In other embodiments, the level signal that applies of first electrode and second electrode also can be different; Perhaps, also a level signal be can on first electrode, apply earlier, same level signal or another level signal on second electrode, applied afterwards again.Likewise, 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, repeat no more at this.
2, first electrode or second electrode to said sensing unit applies level signal respectively for twice so that said self-capacitance is carried out twice charging; Then after each charging, charge detection to obtain the said first charging detected value and the second charging detected value from said first electrode and/or second electrode.In this embodiment, because charging is carried out from first electrode or second electrode, therefore when detecting, need detect respectively from first electrode and second electrode, wherein, detection can be carried out simultaneously, also can carry out respectively.In addition, in the embodiment of the utility model, can also carry out twice charging at first electrode, and carry out twice detection, perhaps, carry out twice charging, carry out twice detection at second electrode from second electrode from first 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 level signal respectively for twice self-capacitance being carried out twice when charging when first electrode to sensing unit, wherein, in twice charging once with said second electrode grounding, another time connects said second electrode and is high resistant; When second electrode to sensing unit applies level signal respectively for twice self-capacitance being carried out twice when charging, in twice charging once with said first electrode grounding, another time connects said first electrode and is high resistant.Even carried out twice charging at first electrode like this; Because the change of second electrode state; Also can carry out twice detection, to obtain to react first detected value and second detected value of proportionate relationship between first resistance R 1 and second resistance R 2 at first electrode.3, first electrode and second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode and/or second electrode grounding so that self-capacitance is discharged; Carry out discharge examination to obtain the said first discharge examination value and the second discharge examination value from first electrode and/or second electrode afterwards.In this embodiment, because charging is carried out from first electrode and second electrode to self-capacitance, therefore discharge or detection just can be carried out from first electrode and/or second electrode.Particularly, for example can apply level signal so that self-capacitance is charged to first electrode and second electrode simultaneously, perhaps also can not apply simultaneously.Twice discharge can be all with first electrode grounding, perhaps all with second electrode grounding when discharge.
4, first electrode or second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode and second electrode grounding respectively so that self-capacitance is discharged; Carry out discharge examination to obtain the first discharge examination value and the second discharge examination value from first electrode and/or second electrode respectively afterwards.In this embodiment, because discharge is carried out from first electrode and second electrode to self-capacitance, therefore charging or detection just can be carried out from first electrode and/or second electrode.In this embodiment, twice charging also can all be used first electrode, and with second electrode ground connection or connect and be high resistant respectively.Likewise, twice charging also can all be used second electrode, and with first electrode ground connection or connect and be high resistant respectively.
5, first electrode or second electrode to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode or second electrode grounding respectively with to the self-capacitance discharge, carry out discharge examination to obtain the first discharge examination value and the second discharge examination value from first electrode and second electrode respectively afterwards.In this embodiment, because detection is carried out from first electrode and second electrode to self-capacitance, so charge or discharge just can be carried out from first electrode and/or second electrode.In this embodiment, twice charging also can all be used first electrode, and with second electrode ground connection or connect and be high resistant respectively.Likewise, twice charging also can all be used second electrode, and with first electrode ground connection or connect and be high resistant respectively.
Perhaps; On the basis of the foregoing description; Can also when charging, carry out one-time detection to obtain the first charging detected value; When discharge, carry out detecting the second time to obtain the second discharge examination value, obtain the proportionate relationship between first resistance and second resistance according to the first charging detected value and the second discharge examination value again.
From foregoing description, can find out; Above-mentioned charging and detection mode for the utility model have a variety of variations; But the core of the utility model is exactly according to the relation between first resistance and second resistance, and for example perhaps other concern to confirm touch point position to proportionate relationship.Further, the relation between this first resistance and second resistance need detect through the charging and/or the discharge of self-capacitance.If sensing unit is not touched, then just can not produce self-capacitance, therefore there is not follow-up charge/discharge/detection etc. yet, no longer detect for this utility model embodiment, repeat no more at this.
Need to prove also that in addition above-mentioned detection mode is merely some optimal ways of the utility model, those skilled in the art also can expand or revise according to above-mentioned thought, and these all should be included within the protection domain of the utility model.
As shown in Figure 4, be the touch detecting method process flow diagram of the utility model embodiment, this process flow diagram combines schematic diagram shown in Figure 3 together to describe.This method may further comprise the steps:
Step S401 applies level signal to the two ends of sensing unit, and promptly first electrode and/or second electrode to sensing unit applies level signal.In this embodiment, can apply level signal same, also can apply different level signals to first electrode and second electrode.In other embodiments, also can only charge twice, perhaps charge from second electrode for the second time from the charging of first electrode for the first time, perhaps charge from first electrode for the second time from the charging of second electrode for the first time from first electrode or second electrode.
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 through the level signal that applies.In the embodiment of the utility model,, can improve the accuracy of detection of self-capacitance through charging to self-capacitance.
Need to prove,, then need corresponding two self-capacitance detection sub-module to detect from the two ends of sensing unit simultaneously if apply level signal simultaneously to the two ends of sensing unit.And if, then only need a self-capacitance detection sub-module to get final product respectively to the two ends time.In an embodiment of the utility model, first detected value and second detected value can for from first electrode and/or second electrode detection to capacitance charge variation delta Q1 and Δ Q2.Through Δ Q1 and Δ Q2, promptly 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 first detected value and second detected value.In this embodiment, detection can be carried out when charging, also can when discharge, carry out.In above-mentioned example, first detected value and second detected value are respectively Δ Q1 and Δ Q2.Below be that the change in electrical charge amount is that example is described with first detected value and second detected value, but other detected values that can reaction resistance R1 concern with R2, for example level signal, electric current etc. also all can adopt.In the embodiment of the utility model, both can detect simultaneously, also can detect respectively.
In an embodiment of the utility model,, then need two self-capacitance detection modules simultaneously first electrode and second electrode to be detected if detect simultaneously.
In another embodiment of the utility model; Also can adopt a self-capacitance detection module to detect; In step S401, after being full of through the first electrode pair self-capacitance C1, promptly this self-capacitance detection module detects through the first electrode pair self-capacitance C1.Then again through second electrode pair self-capacitance C2 charging, then this self-capacitance detection module detects through the second electrode pair self-capacitance C1 again.
Because the phase place that adopts during this sensing unit of self-capacitance detection module scanning is all consistent with level signal, the electric charge when therefore for same self-capacitance C1, charging just equals the inverse ratio of their resistance.Supposing, is respectively Δ Q1 and Δ Q2 from first electrode of sensing unit and the change in electrical charge amount of second electrode pair sensing unit detection acquisition.In the embodiment of the utility model, the self-capacitance detection module can be known self-capacitance detection module at present.In an embodiment of the utility model,, but, therefore can not increase the overall power of chip then owing to two a plurality of devices of self-capacitance detection module technology if adopt two self-capacitance detection modules.
Step S403 judges according to first detected value and second detected value whether this sensing unit is touched.Particularly, in an embodiment of the utility model, can whether determine whether to be touched through judging change in electrical charge amount Δ Q1 and Δ Q2 greater than threshold value.Certainly, in other embodiment of the utility model, also other judgment modes can be set, whether for example judge change in electrical charge amount Δ Q1 and Δ Q2 less than threshold value, if less than, judge that then sensing unit is touched.Likewise, this threshold value also need be according to the size and the type of touch-screen, and the size of sensing unit is confirmed.
Step S404 is touched if judge this sensing unit, then further calculates first resistance of first electrode to said self-capacitance described in the corresponding sensing unit and the proportionate relationship between said second electrode to second resistance of said self-capacitance this moment.In the embodiment of the utility model; Proportionate relationship between first resistance and said second resistance is according to the self-capacitance charge/discharge time, from first electrode and/or second electrode detects first detected value of acquisition and the proportionate relationship between second detected value calculates.The same, the coordinate on the sensing unit at C1 place is Δ Q2/ (Δ Q1+ Δ Q2).
Step S405 confirms the touch location on second direction according to the position of sensing unit.Particularly, can adopt centroid algorithm to calculate the touch location of touch point on second direction, below centroid algorithm carried out brief account.
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, to this array scan with checking given sensing station be effectively, be to be greater than preset touch threshold for the requirement of the adjacent sensing unit signal of some.After finding the strongest signal, this signal all is used for computing center with those closing signals greater than touch threshold:
Wherein, Ncent is the label of center sensing unit, and 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:
The utility model embodiment 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 the embodiment of the utility model, can be parallel to each other between disjoint sensing unit, also can be partly parallel between perhaps disjoint sensing unit.Wherein, a plurality of sensing units are formed on the substrate, and each of a plurality of sensing units all has first electrode and second electrode that is oppositely arranged.As shown in Figure 5, be the contactor control device synoptic diagram of an embodiment of the utility model.This contactor control device comprises substrate 100, a plurality of disjoint sensing unit 200 and detection module 300.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 first electrode 210 and second electrode 220 that is oppositely arranged.Adopt parallel rectangle sensing unit 200 can reduce the structure complexity of device, thereby can on the basis that guarantees accuracy of detection, reduce manufacturing cost.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; For example sensing unit a part or all have certain radian etc., these all can be applicable in the utility model.Detection module 300 links to each other with second electrode 220 with first electrode 210 of a plurality of sensing units 200 respectively.And detection module 300 applies level signal to first electrode 210 and/or second electrode 220 of a plurality of sensing units 200; The self-capacitance that makes this level signal when sensing unit 200 is touched, to produce to sensing unit 200 charges; And detection module 300 one or part when being touched in detecting a plurality of sensing units 200; Calculate the proportionate relationship between second resistance of first resistance and second electrode 220 to the self-capacitance of first electrode 210 to the self-capacitance in the corresponding sensing unit; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the sensing unit that is touched 200 according to the proportionate relationship between first resistance and second resistance.Particularly; Proportionate relationship between first resistance and second resistance is according to the self-capacitance charge/discharge time; From first electrode and/or second electrode detects first detected value of acquisition and the proportionate relationship between second detected value calculates; Can carry out simultaneously charging, discharge or the detection of first electrode and second electrode as stated, also can separately carry out.When detection module 300 confirms that according to first detected value and second detected value corresponding sensing unit is touched; Then detection module 300 calculates the proportionate relationship of first resistance and second resistance according to first detected value and second detected value; Thereby further judge the touch location on first direction, and confirm the touch location on second direction according to the position of the sensing unit 200 of correspondence.Last detection module 300 just can be confirmed the position of touch point on touch-screen according to touch location on the first direction and the touch location on the second direction.Also need to prove at this; In the embodiment of the utility model for not restriction concerning the charging of sensing unit and discharge order; For example in one embodiment; Can charge successively to all sensing units 200 with the mode of scanning, then in turn it carried out discharge examination again; In another embodiment; Can one by one sensing unit 200 be charged and discharge, for example, with that it is carried out discharge examination after 200 chargings of a sensing unit; After this sensing unit 200 finished dealing with, more next sensing unit 200 is handled.
In an embodiment of the utility model; Detection module 300 applies level signal so that self-capacitance is charged to first electrode 210 and second electrode 220 of sensing unit 200, and detection module 300 charges detection to obtain the first charging detected value and the second charging detected value from first electrode 210 and/or second electrode 220.
In an embodiment of the utility model; Detection module 300 applies level signal so that self-capacitance is charged to first electrode 210 or second electrode 220 of sensing unit 200, and detection module 300 charges detection to obtain the first charging detected value and the second charging detected value from first electrode 210 and second electrode 220 respectively.
In an embodiment of the utility model; Detection module 300 applies level signal so that self-capacitance is charged to first electrode 210 and second electrode 220 of sensing unit 200; Detection module 300 control first electrodes 210 and/or second electrode, 220 ground connection are to discharge to self-capacitance, and detection module 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from first electrode and/or second electrode.
In an embodiment of the utility model; Detection module 300 applies level signal so that self-capacitance is charged to first electrode 210 or second electrode 220 of sensing unit 200; Detection module 300 is controlled first electrode 210 and second electrode, 220 ground connection respectively with to the self-capacitance discharge, and detection module 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from first electrode 210 and/or second electrode 220 respectively.
In an embodiment of the utility model; Detection module 300 applies level signal so that self-capacitance is charged to first electrode 210 or second electrode 220 of sensing unit 200; Detection module 300 is controlled first electrode 210 or second electrode, 220 ground connection respectively with to the self-capacitance discharge, and detection module 300 carries out discharge examination to obtain the first discharge examination value and the second discharge examination value from first electrode 210 and second electrode 220 respectively.
In an embodiment of the utility model, 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 be provided with.Though in Fig. 5 of this embodiment, the sensing unit along continuous straight runs is placed, in other embodiments, sensing unit also can vertically be provided with.
As shown in Figure 6, be the contactor control device synoptic diagram of another embodiment of the utility model.This contactor control device comprises touch screen detection device, touch screen controller 400 and the host computer 500 that links to each other with touch screen controller 400 that is made up of substrate 100 and a plurality of disjoint sensing units 200.Wherein, A part of pin in the touch screen controller 400 links to each other with first electrode 210 of a plurality of sensing units 200; Another part pin in the touch screen controller 400 links to each other with second electrode 220 of a plurality of sensing units 200; And touch screen controller 400 applies level signal to first electrode 210 and/or second electrode 220 of a plurality of sensing units 200; The self-capacitance charging that this level signal produces to sensing unit 200 when sensing unit 200 is touched; And touch screen controller 400 one or part when being touched in detecting a plurality of sensing units are calculated the proportionate relationship between second resistance of first resistance and second electrode to self-capacitance of first electrode to self-capacitance in the corresponding sensing unit.Likewise, this charging, discharge and detection can be carried out also can carrying out respectively simultaneously, repeat no more at this.In addition, first detected value and second detected value can be one or more in current detection value, self-capacitance detected value, level signal detected value and the change in electrical charge amount, as long as can react the difference between first resistance and second resistance.In an embodiment of the utility model, comprise among the touch screen controller 400 that two self-capacitance detection modules are to detect from first electrode 210 and 220 pairs of sensing units 200 of second electrode simultaneously.Because these two self-capacitance detection modules can more shared devices, therefore can not increase the overall power of chip yet.In another embodiment of the utility model, also can only adopt a self-capacitance detection module to detect from first electrode 210 and 220 pairs of sensing units 200 of second electrode successively.Host computer 500 receives first resistance of touch screen controller 400 transmissions and the proportionate relationship between second resistance; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the sensing unit that is touched according to the proportionate relationship between first resistance and second resistance.。In the embodiment of the utility model, can adopt centroid algorithm to calculate the touch location on second direction, thereby further improve precision.Like this, host computer 500 just can be confirmed the position of touch point on touch-screen according to touch location on the first direction and the touch location on the second direction.
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 with the different pin of touch screen controller respectively and gets final product can sensing unit being charged and discharge, and therefore can find out that the utility model does not limit the concrete structure of sensing unit.Sensing unit can have multiple structure; Those skilled in the art can change sensing unit on the basis of the above-mentioned thought of the utility model or improve, but just should be included within the scope of the utility model as long as do not break away from these structures of above-mentioned thought of the utility model.At this utility model embodiment a kind of improved sensing unit structure has been proposed also.
As shown in Figure 7, be the sensing unit structural drawing of the utility model preferred embodiment.This sensing unit 200 comprises a plurality of first structures 230 and a plurality of second structure 240.Wherein, a plurality of second structures 240 can be parallel to each other, also can be not parallel.Preferably, first structure 230 and second structure 240 are rectangle.And the angle between second structure 240 and first structure 230 is preferably 90 degree, also can select other angles certainly.As shown in Figure 7, this sensing unit 200 joins end to end a plurality of first structures 230 through a plurality of second structures 240, and first electrode 210 of sensing unit 200 links to each other with first structure 230 at two ends respectively with second electrode 220.See that from one-piece construction this sensing unit 200 is for having the rectangle than the aspect ratio.This need to prove, though in Fig. 7, sensing unit 200 is provided with along the X axle, it will be understood by those skilled in the art that this sensing unit 200 also can be along the setting of Y axle.Structure through this sensing unit can reduce noise effectively, improves the linearity of induction.
In sum; The utility model embodiment applies level signal through the electrode to the sensing unit two ends; If this sensing unit is touched; Then can form self-capacitance by this sensing unit, so the utility model can charge through the level signal that applies to this self-capacitance, and confirm the touch location on first direction according to the proportionate relationship between first resistance and second resistance.For example in an embodiment of the utility model; Proportionate relationship between first resistance and second resistance is according to said self-capacitance charge/discharge the time, from said first electrode and/or second electrode detects first detected value of acquisition and the proportionate relationship between second detected value calculates.First detected value and second detected value that produce during therefore from first electrode and/or this self-capacitance charge/discharge of second electrode detection.Like this, just can react the position that the touch point is positioned at this sensing unit, thereby further confirm the position of touch point at touch-screen through first detected value and second detected value.
The utility model embodiment has proposed a kind of self-capacitance detection mode of novelty; When sensing unit is touched; The touch point just can be divided into two resistance with this sensing unit, thereby is carrying out considering when self-capacitance detects that these two resistance just can confirm the position of touch point on this sensing unit.The utility model embodiment's is simple in structure; And for a sensing unit; Can carry out charge or discharge from its first electrode and/or 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 squint.In addition, the property that the utility model embodiment can also effectively the improve circuit ratio of making an uproar reduces circuit noise, improves the induction linearity.In addition; The contactor control device of the utility model embodiment is not influenced by mutual capacitance, to water not reaction fully, and in testing process because the sensing unit that is touched is charged; Therefore wherein can produce little electric current; Can eliminate of the influence of Vcom level signal well, therefore can correspondingly eliminate screenmask layer and concerned process steps, thereby can when having strengthened antijamming capability, further reduce cost the self-capacitance of sensing unit generation in the touch-screen.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained among at least one embodiment or example of the utility model.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
Although illustrated and described the embodiment of the utility model; For those of ordinary skill in the art; Be appreciated that under the situation of principle that does not break away from the utility model and spirit and can carry out multiple variation, modification, replacement and modification that the scope of the utility model is accompanying claims and be equal to and limit to these embodiment.
Claims (12)
1. a contactor control device is characterized in that, comprising:
Substrate;
A plurality of disjoint sensing units, said a plurality of sensing units are formed on the said substrate, and each of said a plurality of sensing units all has first electrode and second electrode; With
Detection module; Said detection module respectively with said a plurality of sensing units in each first electrode link to each other with second electrode; Said detection module applies level signal to first electrode and/or second electrode of said a plurality of sensing units; The self-capacitance charging that said level signal produces to said sensing unit when sensing unit is touched; And said detection module one or part when being touched in detecting said a plurality of sensing unit; Calculate first resistance of first electrode described in the corresponding sensing unit to said self-capacitance and the proportionate relationship between said second electrode to second resistance of said self-capacitance; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the said sensing unit that is touched according to the proportionate relationship between said first resistance and said second resistance.
2. contactor control device as claimed in claim 1 is characterized in that, said sensing unit is a rectangle.
3. contactor control device as claimed in claim 1 is characterized in that, said sensing unit comprises a plurality of first structures and a plurality of second structure, through said a plurality of second structures said a plurality of first structures is joined end to end.
4. contactor control device as claimed in claim 1 is characterized in that, said first direction is the length direction of said sensing unit, and said second direction is the direction perpendicular to said sensing unit, and said sensing unit is horizontally disposed with or vertically is provided with.
5. contactor control device as claimed in claim 1 is characterized in that, said detection module comprises one or two self-capacitance detection sub-module.
6. a touch screen detection device is characterized in that, comprising:
Substrate; With
A plurality of disjoint sensing units; Said a plurality of sensing unit is formed on the said substrate; And each of said a plurality of sensing units all has first electrode and second electrode that is oppositely arranged, and wherein, each first electrode all links to each other with a pin of touch screen controller with second electrode.
7. touch screen detection device as claimed in claim 6 is characterized in that, said sensing unit is a rectangle.
8. touch screen detection device as claimed in claim 6 is characterized in that, said sensing unit comprises a plurality of first structures and a plurality of second structure, through said a plurality of second structures said a plurality of first structures is joined end to end.
9. a contactor control device is characterized in that, comprising:
Touch screen detection device, said touch screen detection device are like each described touch screen detection device of claim 6 to 8;
Touch screen controller; A part of pin in the said touch screen controller links to each other with first electrode of said a plurality of sensing units; Another part pin in the said touch screen controller links to each other with second electrode of said a plurality of sensing units; And said touch screen controller applies level signal to first electrode and/or second electrode of said a plurality of sensing units; The self-capacitance charging that said level signal produces to said sensing unit when sensing unit is touched; And said touch screen controller one or part when being touched in detecting said a plurality of sensing unit, first resistance that calculates first electrode described in the corresponding sensing unit to said self-capacitance and said second electrode be the proportionate relationship between second resistance of said self-capacitance extremely;
Host computer; Said host computer receives first resistance of said touch screen controller transmission and the proportionate relationship between second resistance; And confirm the touch location on first direction, and confirm the touch location on second direction according to the position of the said sensing unit that is touched according to the proportionate relationship between said first resistance and said second resistance.
10. contactor control device as claimed in claim 9 is characterized in that, said touch screen controller comprises one or two self-capacitance detection sub-module.
11. a portable electric appts is characterized in that, comprises each described contactor control device like claim 1-5.
12. a portable electric appts is characterized in that, comprises each described contactor control device like claim 9-10.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202671093U CN202267944U (en) | 2011-07-26 | 2011-07-26 | Touch screen detecting device and touch control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202671093U CN202267944U (en) | 2011-07-26 | 2011-07-26 | Touch screen detecting device and touch control device |
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| CN202267944U true CN202267944U (en) | 2012-06-06 |
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| CN2011202671093U Expired - Fee Related CN202267944U (en) | 2011-07-26 | 2011-07-26 | Touch screen detecting device and touch control device |
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| CN102902438A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detecting method, touch screen detecting device and touch device |
| CN102902388A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detection method, touch screen detector and touch device |
| WO2013013629A1 (en) * | 2011-07-26 | 2013-01-31 | Shenzhen Byd Auto R&D Company Limited | Touch detecting method, touch detecting assembly, touch sensitive device and portable electronic apparatus |
| CN103970357A (en) * | 2014-03-12 | 2014-08-06 | 友达光电股份有限公司 | Electronic device and touch point judgment method |
| CN104850283A (en) * | 2014-02-14 | 2015-08-19 | 晨星半导体股份有限公司 | Self-capacitance touch panel electrode using zigzag line segment to increase resistance value |
| CN105183254A (en) * | 2015-08-18 | 2015-12-23 | 南京触宏微电子有限公司 | Touch detection method and apparatus for touch screen and touch screen |
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2011
- 2011-07-26 CN CN2011202671093U patent/CN202267944U/en not_active Expired - Fee Related
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| WO2013013625A1 (en) * | 2011-07-26 | 2013-01-31 | Shenzhen Byd Auto R&D Company Limited | Touch detecting assembly, touch sensitive device and portable electronic apparatus |
| WO2013013637A1 (en) * | 2011-07-26 | 2013-01-31 | Shenzhen Byd Auto R&D Company Limited | Touch detecting method, touch sensitive device and portable electronic apparatus |
| CN102902438A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch detecting method, touch screen detecting device and touch device |
| WO2013013635A1 (en) * | 2011-07-26 | 2013-01-31 | Shenzhen Byd Auto R&D Company Limited | Touch detecting assembly, touch sensitive device and portable electronic apparatus |
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| CN103970357A (en) * | 2014-03-12 | 2014-08-06 | 友达光电股份有限公司 | Electronic device and touch point judgment method |
| CN103970357B (en) * | 2014-03-12 | 2017-06-13 | 友达光电股份有限公司 | Electronic device and touch point judgment method |
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