CN202600661U - Touch screen detection equipment, touch control device and portable electronic equipment - Google Patents
Touch screen detection equipment, touch control device and portable electronic equipment Download PDFInfo
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- CN202600661U CN202600661U CN2011205737976U CN201120573797U CN202600661U CN 202600661 U CN202600661 U CN 202600661U CN 2011205737976 U CN2011205737976 U CN 2011205737976U CN 201120573797 U CN201120573797 U CN 201120573797U CN 202600661 U CN202600661 U CN 202600661U
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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
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Abstract
The utility model brings forward a piece of touch screen detection equipment, a touch control device and a piece of portable electronic equipment. The touch control device comprises: a substrate; a plurality of non-intersecting sensor units, which are formed on the substrate, and each of the sensor units has a first electrode and a second electrode in relatively arrangement; and a touch screen control chip. Embodiments of the utility model can effectively improve the signal-to-noise ratio of the circuit, reduce circuit noises, and raise induction linearity.
Description
Technical field
The utility model relates to electronic device design and manufacturing technology field, particularly a kind of Touch-screen testing equipment, contactor control device and portable electric appts.
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 '; It detects principle is that X axle and Y axle are scanned respectively; Exceeded preset range if detect the capacitance variations of certain point of crossing, then with the point of crossing of this row and column as touch coordinate.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.
Shown in Fig. 2 a, be the structural drawing of another kind of self-capacitance touch-screen common in the prior art.This self-capacitance touch-screen adopts triangular pattern screen structure.This self-capacitance touch-screen comprises substrate 300 ', is arranged on a plurality of electrodes 500 ' that a plurality of triangle sensing units 400 ' on the substrate 300 ' link to each other with each triangle sensing unit 400 '.Shown in Fig. 2 b, be the detection principle of triangle self-capacitance touch-screen.As shown in the figure, ellipse representation finger, S1, S2 represent to point the contact area with two triangle sensing units.The false coordinate initial point is in the lower left corner, horizontal ordinate X=S2/ (S1+S2) * P then, and wherein, P is a resolution.When finger moved right, because S2 is not linear the increase, there was a deviation in the X coordinate.Can find out that from above-mentioned principle present triangle sensing unit is a single-ended detection, promptly only detect, calculate the coordinate of both direction then through algorithm from a direction.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, because this sensing unit is a triangle, area is not linear the increase when finger laterally moves, so the linearity is relatively poor, has caused coordinate Calculation to squint, and the linearity is good inadequately.
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: Touch-screen testing equipment, and said Touch-screen testing equipment comprises: substrate; With a plurality of sensing units that are formed on the said substrate, said a plurality of sensing units mutually disjoint, and each said sensing unit comprises: first, and an end of said first has first electrode; Second portion, an end of said second portion links to each other with the other end of said first, and the other end of said second portion has second electrode; The touch-screen control chip; A part of pin in the said touch-screen control chip links to each other with first electrode of said a plurality of sensing units; Another part pin in the said touch-screen control chip links to each other with second electrode of said a plurality of sensing units; And said touch-screen control chip 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 control chip one or part when being touched in detecting said a plurality of sensing unit; Calculate the proportionate relationship between first electrode described in the corresponding sensing unit to first resistance of said self-capacitance and said second electrode to second resistance of said self-capacitance, and according to said proportionate relationship and the said sensing unit calculating touch point coordinate that is touched.
The utility model embodiment second aspect has also proposed a kind of Touch-screen testing equipment, comprising: substrate; With a plurality of sensing units that are formed on the said substrate, said a plurality of sensing units mutually disjoint, and each said sensing unit comprises: first, and an end of said first has first electrode; Second portion, an end of said second portion links to each other with the other end of said first, and the other end of said second portion has second electrode, and wherein, each first electrode all links to each other with the corresponding pin of touch-screen control chip with second electrode.
The utility model embodiment third aspect has also proposed a kind of portable electric appts, comprises aforesaid contactor control device or Touch-screen testing equipment.
Sensing unit in the touch screen detection device of the utility model embodiment adopts both-end to detect; The two ends that are sensing unit all have electrode; And each electrode all links to each other with the corresponding pin of touch-screen control chip, when touching detection, can realize the location to the touch point through sensing unit self.
The utility model embodiment applies level signal through the electrode to the sensing unit two ends; If this sensing unit is touched; Finger then can form self-capacitance with this sensing unit; Therefore the utility model can charge to this self-capacitance through the level signal that applies, and confirms touch location 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 charging and/or 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 charging of second electrode detection and/or discharge.Like this, just can react the position that the touch point is positioned at this sensing unit, thereby confirm the position of touch point at touch-screen through first detected value and second detected value.
In addition, sensing unit only needs adjacent both sides cabling to get final product, and not only can reduce track lengths, but also can improve setting-out precision and the use that reduces the silver slurry, thereby reduces manufacturing cost.What is more important; Ratio realizes confirming of touch location to the utility model between first resistance and second resistance through calculating, therefore with respect to present rhombus or triangular design, because when confirming touch location; Need not to calculate the size of self-capacitance; And the size of self-capacitance can not influence the precision of touch location, thereby has improved measuring accuracy, has improved the linearity.In addition, because any rectangle that all can be regular shape in the first of the utility model embodiment and the second portion therefore with respect to irregular shapes such as present rhombus or triangles, also can improve the linearity further.
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 charging and/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.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.
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 a is the structural drawing of another kind of self-capacitance touch-screen common in the prior art;
Fig. 2 b is the detection schematic diagram of another kind of self-capacitance touch-screen common in the prior art;
Fig. 3 is the detection principle schematic of the utility model embodiment contactor control device;
Fig. 4 a is the utility model embodiment Touch-screen testing equipment structural drawing;
Fig. 4 b is another embodiment touch screen detection device structural drawing of the utility model;
Synoptic diagram when Fig. 5 is touched for the sensing unit of the utility model embodiment; With
Fig. 6 is the contactor control device synoptic diagram of an embodiment of the utility model.
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 210 were nearer, then resistance R 1 was just less, and resistance R 2 is just bigger; Otherwise when touch point and second electrode 220 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.
Need to prove; In the embodiment of the utility model; Above-mentioned first electrode is identical with the function of second electrode, and the two can exchange, therefore in the above-described embodiments; Both can also can need electric current through first resistance and this requirement of second resistance as long as can satisfy when charging, discharge or detection from first electrode detection from second electrode detection.
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 with hand; Therefore the data that detect self-capacitance can be very little, do not satisfy the Rule of judgment that touches, for constantly scanning among this utility model embodiment; Wait for that finger touch just begins to calculate after sensing unit, repeat no more at this.
In the embodiment of the utility model, can apply correspondent voltage to a plurality of sensing units successively with the mode of scanning, when detecting, also can detect successively simultaneously with the mode of scanning.
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.
Shown in Fig. 4 a, be the utility model embodiment Touch-screen testing equipment structural drawing.This contactor control device comprises substrate 100, a plurality of disjoint sensing unit 200, and each of a plurality of sensing unit 200 all has first electrode 210 and second electrode 220.In the embodiment of the utility model, substrate 100 can be single layer substrate.Wherein, in an embodiment of the utility model, the length of a plurality of sensing units increases gradually, and each said sensing unit comprises first 230 and second portion 240.One end of first 230 has first electrode 210, and an end of second portion 240 links to each other with the other end of first 230, and the other end of second portion 240 has second electrode 220.
Particularly, first 230 is parallel with first limit 110 of substrate 100, and second portion 240 is parallel with second limit 120 of substrate 100, and first limit 110 is adjacent with second limit 120.And each first electrode 210 all links to each other with the corresponding pin of touch-screen control chip with second electrode 220.
In the preferred embodiment of the utility model, the first 230 of each sensing unit 200 is parallel with the first 230 of other sensing units 200, and the second portion 240 of each sensing unit 200 is parallel with the second portion 240 of other sensing units 200.Can improve the coverage rate of sensing unit effectively through such setting to touch-screen.In an embodiment of the utility model, at least one is a rectangle in the first 230 of sensing unit 200, the second portion 240, and preferably, first 230, second portion 240 are rectangle.In this embodiment because rectangular configuration figure rule, therefore finger laterally or when vertically moving the linearity good, in addition, the spacing between two rectangular configuration is identical, is convenient to calculate.
Sensing unit in the touch screen detection device of the utility model embodiment adopts both-end to detect; The two ends that are sensing unit all have electrode; And each electrode all links to each other with the corresponding pin of touch-screen control chip, when touching detection, can realize the location to the touch point through sensing unit self.
What is more important, ratio realizes confirming of touch location to the utility model between first resistance and second resistance through calculating, therefore with respect to present rhombus or triangular design; Because when confirming touch location; Need not to calculate the size of self-capacitance, and the size of self-capacitance can not influence the precision of touch location, the dependence of self-capacitance accuracy of detection is reduced; Thereby improved measuring accuracy, improved the linearity.In addition, because any rectangle that all can be regular shape in the first of the utility model embodiment, second portion therefore with respect to irregular shapes such as present rhombus or triangles, also can improve the linearity further.
In an embodiment of the utility model, the first of each sensing unit and second portion equal in length, thus can improve arithmetic speed.Preferably, substrate 100 is a rectangle, and is vertical each other between first limit 110 and second limit 120.First limit 110 is vertical each other with second limit 120; Not only make the sensing unit design regular more; For example make between first 230 and the second portion 240 of sensing unit also vertical each other; Thereby improve coverage rate, and vertically also can improve the linearity of detection each other between first 230 and the second portion 240 touch-screen.
In an embodiment of the utility model; Spacing between adjacent two sensing units 200 equates; That is to say that the spacing between the first 230 of adjacent two sensing units 200 equates that the spacing between the second portion 240 of adjacent two sensing units 200 equates.So just can evenly divide, thereby improve arithmetic speed through first limit 110 and second limit 120 of 200 pairs of touch-screens of a plurality of sensing units.
Certainly in another embodiment of the utility model; Spacing between adjacent two sensing units 200 can not wait yet; Shown in Fig. 4 b; For example, therefore can the spacing between the sensing unit at touch screen center position be reduced, thereby improve the accuracy of detection in centre because the user often touches the centre of touch-screen.
In an embodiment of the utility model, a plurality of sensing units 200 are positioned at same one deck, therefore only need one deck ITO to get final product, thereby when guaranteeing precision, greatly reduce manufacturing cost.
Shown in Fig. 4 a.In this embodiment, first electrode 210 of sensing unit 200 is positioned on first limit 110 of substrate 100, and second electrode 220 is positioned on second limit 120 of substrate 100, and first limit 110 is vertical each other with second limit 120.In this embodiment, detect after the touch location on sensing unit, can obtain the touch location on touch-screen.
As shown in Figure 5, the synoptic diagram when being touched for the sensing unit of the utility model embodiment.Can know that from Fig. 5 first electrode is that 210, the second electrodes are 220; Touch location A approaches second electrode 220; The length of supposing sensing unit is 10 unit lengths, and sensing unit is divided into 10 parts equably, wherein; The length of sensing unit first 230 is 5 unit lengths, and the length of sensing unit second portion 240 is 5 unit lengths.Through detecting, the ratio of knowing first resistance and second resistance is 9:1, and promptly the length of first electrode 210 to the touch location (being embodied by first resistance) is 90% of whole sensing unit length.In other words, the touch point is positioned at the position of 9 unit lengths in distance first electrode, 210 places, knows, the touch point is positioned at the position of 1 unit length in distance second electrode, 220 places.
Can find out that from the above example of Fig. 5 the account form of the utility model is very simple, therefore can greatly improve the reaction velocity that touch-screen detects.
As shown in Figure 6, be the contactor control device synoptic diagram of an embodiment of the utility model.This contactor control device comprises Touch-screen testing equipment 300, the touch-screen control chip 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 control chip 400 links to each other with first electrode 210 of a plurality of sensing units 200, and another part pin in the touch-screen control chip 400 links to each other with second electrode 220 of a plurality of sensing units 200.Touch-screen control chip 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 control chip 400 one or part when being touched in detecting a plurality of sensing units; Calculate 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, and calculate the touch point coordinate according to said proportionate relationship and the said sensing unit that is touched.Likewise, this charging, discharge and detection can be carried out also can carrying out respectively simultaneously, repeat no more at this.For example; With reference to shown in Figure 5, outermost sensing unit is touched, and touch-screen control chip 400 has obtained the proportionate relationship of first resistance and second resistance of outermost sensing unit; Because the positional information of outermost sensing unit has been stored in the touch-screen control chip 400; Certainly also can be stored in the external storer, so touch-screen control chip 400 just can search the positional information of outermost sensing unit according to this proportionate relationship, thereby confirm the touch point coordinate.
In the embodiment of the utility model; Usually finger or other objects can touch a plurality of sensing units; This moment, touch-screen control chip 400 can obtain in a plurality of sensing units that this is touched the touch location of each earlier, then through asking average mode to calculate final touch location on touch-screen.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 control chip 400 that two capacitance detecting device CTS are to detect from first electrode 210 and 220 pairs of sensing units 200 of second electrode simultaneously.Because these two capacitance detecting device CTS 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 touch-screen control chip 400 to detect from first electrode 210 and 220 pairs of sensing units 200 of second electrode successively.Touch-screen control chip 400 is confirmed touch location according to the proportionate relationship between first resistance and second resistance.
In an embodiment of the utility model; Proportionate relationship between first resistance and second resistance is according to self-capacitance charging and/or discharge the time, from first electrode and/or second electrode detects first detected value of acquisition and the proportionate relationship between second detected value calculates.
In an embodiment of the utility model, first detected value and second detected value are one or more in current detection value, self-capacitance detected value, level signal detected value and the change in electrical charge amount.
In an embodiment of the utility model, first detected value comprises the first charging detected value or the first discharge examination value, and said second detected value comprises the second charging detected value or the second discharge examination value.
In an embodiment of the utility model; Touch-screen control chip 400 applies level signal so that self-capacitance is charged to first electrode 210 and second electrode 220 of sensing unit 200, and touch-screen control chip 400 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; Touch-screen control chip 400 applies level signal respectively for twice so that self-capacitance is carried out twice charging to first electrode 210 or second electrode 220 of sensing unit 200, and touch-screen control chip 400 charges detection to obtain the first charging detected value and the second charging detected value from first electrode 210 and/or second electrode 220 after each charging.
In an embodiment of the utility model; When touch-screen control chip 400 applies level signal respectively for twice when self-capacitance being carried out twice charging to first electrode 210 of sensing unit 200; In twice charging once with second electrode, 220 ground connection, another time connects second electrode 220 and is high resistant; Perhaps, when touch-screen control chip 400 applies level signal respectively for twice when self-capacitance being carried out twice charging to second electrode 220 of sensing unit 200, in twice charging once with first electrode, 210 ground connection, another time connects first electrode 210 and is high resistant.
In an embodiment of the utility model; Touch-screen control chip 400 applies level signal so that self-capacitance is charged to first electrode 210 and second electrode 220 of sensing unit 200; Touch-screen control chip 400 control first electrodes 210 and/or second electrode, 220 ground connection are to discharge to self-capacitance, and touch-screen control chip 400 carries out discharge examination to obtain the said first discharge examination value and the second discharge examination value from first electrode 210 and/or second electrode 220.
In an embodiment of the utility model; Touch-screen control chip 400 applies level signal so that self-capacitance is charged to first electrode 210 or second electrode 220 of sensing unit 200; Touch-screen control chip 400 is controlled first electrode 210 and second electrode, 220 ground connection respectively with to the self-capacitance 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 first electrode 210 and/or second electrode 220 respectively.
In an embodiment of the utility model; Touch-screen control chip 400 applies level signal so that self-capacitance is charged to first electrode 210 or second electrode 220 of sensing unit 200; Touch-screen control chip 400 is controlled first electrode 210 or second electrode, 220 ground connection respectively with to the self-capacitance 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 first electrode 210 and second electrode 220 respectively.
In an embodiment of the utility model, touch-screen control chip 400 comprises one or two CTS (capacitance detecting device).
The utility model embodiment applies level signal through the electrode to the sensing unit two ends; If this sensing unit is touched; Finger then can form self-capacitance with this sensing unit; Therefore the utility model can charge to this self-capacitance through the level signal that applies, and confirms touch location 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 charging and/or 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 charging of second electrode detection and/or discharge.Like this, just can react the position that the touch point is positioned at this sensing unit, thereby confirm the position of touch point at touch-screen through first detected value and second detected value.
In addition, sensing unit only needs adjacent both sides cabling to get final product, and not only can reduce track lengths, but also can improve setting-out precision and the use that reduces the silver slurry, thereby reduces manufacturing cost.What is more important with respect to present rhombus or triangular design, can greatly improve the linearity, thereby improves accuracy of detection.
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 charging and/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.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 (19)
1. a contactor control device is characterized in that, comprising:
Touch-screen testing equipment, said Touch-screen testing equipment comprises:
Substrate; With
Be formed on a plurality of sensing units on the said substrate, said a plurality of sensing units mutually disjoint, and each said sensing unit comprises:
First, an end of said first has first electrode;
Second portion, an end of said second portion links to each other with the other end of said first, and the other end of said second portion has second electrode;
The touch-screen control chip; A part of pin in the said touch-screen control chip links to each other with first electrode of said a plurality of sensing units; Another part pin in the said touch-screen control chip links to each other with second electrode of said a plurality of sensing units; And said touch-screen control chip 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 control chip one or part when being touched in detecting said a plurality of sensing unit; Calculate the proportionate relationship between first electrode described in the corresponding sensing unit to first resistance of said self-capacitance and said second electrode to second resistance of said self-capacitance, and according to said proportionate relationship and the said sensing unit calculating touch point coordinate that is touched.
2. contactor control device as claimed in claim 1 is characterized in that the first of each said sensing unit is parallel with the first of other sensing units, and the second portion of each said sensing unit is parallel with the second portion of other sensing units.
3. contactor control device as claimed in claim 2 is characterized in that, wherein, said substrate has the first adjacent limit and second limit, and said first is parallel with said first limit, and said second portion is parallel with said second limit.
4. contactor control device as claimed in claim 3 is characterized in that, the first of each said sensing unit and second portion equal in length.
5. contactor control device as claimed in claim 3 is characterized in that, said substrate is a rectangle, and is vertical each other between said first limit and said second limit.
6. contactor control device as claimed in claim 3 is characterized in that, the spacing between the first of adjacent two sensing units equates that the spacing between the second portion of adjacent two sensing units equates.
7. contactor control device as claimed in claim 1 is characterized in that, said a plurality of sensing units are positioned at same one deck.
8. contactor control device as claimed in claim 1 is characterized in that, at least one is a rectangle in said first and the said second portion.
9. contactor control device as claimed in claim 1 is characterized in that, said touch-screen control chip comprises one or two capacitance detecting device CTS.
10. a portable electric appts is characterized in that, comprises each described contactor control device like claim 1-9.
11. a Touch-screen testing equipment is characterized in that, comprising:
Substrate; With
Be formed on a plurality of sensing units on the said substrate, said a plurality of sensing units mutually disjoint, and each said sensing unit comprises:
First, an end of said first has first electrode;
Second portion, an end of said second portion links to each other with the other end of said first, and the other end of said second portion has second electrode, and wherein, each first electrode all links to each other with the corresponding pin of touch-screen control chip with second electrode.
12. Touch-screen testing equipment as claimed in claim 11 is characterized in that, the first of each said sensing unit is parallel with the first of other sensing units, and the second portion of each said sensing unit is parallel with the second portion of other sensing units.
13. Touch-screen testing equipment as claimed in claim 11 is characterized in that, wherein, said substrate has the first adjacent limit and second limit, and said first is parallel with said first limit, and said second portion is parallel with said second limit.
14. Touch-screen testing equipment as claimed in claim 11 is characterized in that, the first of each said sensing unit and second portion equal in length.
15. Touch-screen testing equipment as claimed in claim 11 is characterized in that, said substrate is a rectangle, and is vertical each other between said first limit and said second limit.
16. Touch-screen testing equipment as claimed in claim 11 is characterized in that, the spacing between the first of adjacent two said sensing units equates that the spacing between the second portion of adjacent two said sensing units equates.
17. Touch-screen testing equipment as claimed in claim 11 is characterized in that, said a plurality of sensing units are positioned at same one deck.
18. Touch-screen testing equipment as claimed in claim 11 is characterized in that, at least one is a rectangle in said first and the said second portion.
19. a portable electric appts is characterized in that, comprises each described Touch-screen testing equipment like claim 11-18.
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|---|---|---|---|
| CN2011205737976U CN202600661U (en) | 2011-07-26 | 2011-12-31 | Touch screen detection equipment, touch control device and portable electronic equipment |
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| CN2011205737976U CN202600661U (en) | 2011-07-26 | 2011-12-31 | Touch screen detection equipment, touch control device and portable electronic equipment |
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| CN102902437A (en) * | 2011-07-26 | 2013-01-30 | 比亚迪股份有限公司 | Touch screen detection equipment and touch device |
| CN102902437B (en) * | 2011-07-26 | 2016-04-27 | 比亚迪股份有限公司 | Touch-screen testing equipment and contactor control device |
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