CN202615359U - Touch detection module and touch control device and portable electronic equipment - Google Patents

Touch detection module and touch control device and portable electronic equipment Download PDF

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Publication number
CN202615359U
CN202615359U CN2012201345443U CN201220134544U CN202615359U CN 202615359 U CN202615359 U CN 202615359U CN 2012201345443 U CN2012201345443 U CN 2012201345443U CN 201220134544 U CN201220134544 U CN 201220134544U CN 202615359 U CN202615359 U CN 202615359U
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electrode
hollow
out parts
group
detection components
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李振刚
黄臣
杨云
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BYD Co Ltd
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BYD Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448Details 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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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)
  • Electronic Switches (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The utility model discloses a touch detection module which comprises a base plate and multiple sensing units. The multiple sensing units are arranged on the base plate in non-intersect mode. Each sensing unit comprises a sensing body, a first electrode and a second electrode. The sensing body comprises a first body portion and a second body portion. The first body portion and the second body portion form a pre-set angle. A second end of the first body portion is connected with a first end of the second body portion. The first electrode is connected with a first end of the first body portion and the second electrode is connected with a second end of the second body portion. The sensing body has multiple hollowed-out portions. The multiple hollowed-out portions are arranged on the sensing body according to a pre-set rule in order to define a current path portion which is used to amplify the electric resistance between the first electrode and the second electrode. The touch detection module can obtain electric resistance required for detection precision and further improve the linearity in sensing. The utility model further discloses a touch control device and portable electronic equipment.

Description

Touch detection components, a kind of contactor control device and portable electric appts
Technical field
The utility model relates to electronic device design and manufacturing technology field, relates in particular to a kind of contactor control device and portable electric appts that touches detection components, has said touch detection components.
Background technology
Touch at present detection components (touch-screen) at mobile phone, PDA (personal digital assistant), GPS (GPS), PMP (MP3, MP4 etc.), even obtained application in the electronic equipment such as panel computer.Touch-screen has 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.
The capacitance touch detection components is divided into two types of self-capacitance formula and mutual capacitance types usually.Existing individual layer self-capacitance touch-screen is the scan electrode of the bar shaped of processing at the useful ITO of glass surface (Indium Tin Oxides, nano indium tin metal oxide).ITO is a kind of conductive materials that the fixed resistance rate is arranged, and its consistance on base material is than higher, and the linearity of shielding from resistance just can prove this point.The two poles of the earth of an electric capacity of environment structure around these electrodes and ground and the circuit etc.Will electric capacity of parallel connection when touching with hand or felt pen in circuit, thereby the overall capacitance amount on this sweep trace is changed to some extent.In scanning, control IC scans each sensing element through specific scan mode, and confirms touch point position according to the capacitance variations before and after the scanning, exchanges thereby reach man-machine conversation.Capacitance touch screen is and TFT (Thin Film Transistor, TFT) LCD pairing work together generally speaking, and is placed on above the LCD.
Fig. 1 shows a kind of traditional self-capacitance formula and touches detection components.This self-capacitance formula touches detection components and 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 it is better that this self-capacitance formula touches the linearity of detection components, 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.
Fig. 2 a shows another kind of traditional self-capacitance formula and touches detection components.This self-capacitance formula touches detection components and adopts triangular pattern screen structure.This self-capacitance formula touches detection components and 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 '.Fig. 2 b shows the detection principle that triangle self-capacitance formula touches detection components.Shown in Fig. 2 b, 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 traditional triangle sensing unit is a single-ended detection, promptly only detect, calculate the coordinate of both direction then through algorithm from a direction.Though it is simple in structure that this self-capacitance formula touches detection components, 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, the capacitance change of traditional capacitance sensing unit output 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 application is based on the understanding of inventor to the following fact: the sensing element of traditional individual layer self-capacitance touch-screen is the bar shaped of bilateral lead-in wire.After the size of screen was confirmed, the size of this bar shaped is just basic to have been confirmed.The width of bar shaped sensing element is approximately 5mm, and this width broadens can influence the linearity, and this narrow width will increase the passage sensing element.The length of bar shaped is exactly the length of touch-screen basically.After the length and width of bar shaped were confirmed, the resistance between the two ends of this bar shaped had just been confirmed.Resistance R=P*L/h, wherein, L is the length of sensing element, and h is the height of sensing element, and P is side's resistance (that is, make a square to the ITO layer that is plated in above the base material, the resistance from the left side to the right is a basic parameter of ITO base material then) of ITO.The size of side's resistance P is relevant with the thickness of ITO layer.And in this area the resistance of ITO side is had only several limited standard values.Thus, after making individual layer self-capacitance touch-screen with the base material of fixing ITO side's resistance, every resistance R can calculate.Yet; Because detecting the principle of finger touch is the ratio of calculated resistance, all can influence accuracy of detection if resistance R is too big or too little, wherein parameter P is the base material decision; L and h are the decisions of touch-screen size; Can not arbitrarily change during design, so if sensing element is made simple bar shaped, resistance often is not the value of optimum measurement.
Being intended to of the utility model one of solves the problems of the technologies described above at least to a certain extent, especially is intended to solve or avoid to occur traditional self-capacitance formula at least and touches one of above-mentioned shortcoming in the detection components.
The first aspect of the utility model embodiment has proposed a kind of touch detection components, comprising: substrate; With a plurality of sensing units; Said a plurality of sensing unit is located on the said substrate and mutually disjoints; Each said sensing unit comprises induction body and first electrode and second electrode that link to each other with said induction body respectively; Said induction body has a plurality of hollow-out parts, and said a plurality of hollow-out parts are arranged to limit the current path portion that is used to increase the resistance between said first and second electrodes on the said induction body with pre-defined rule.
Touch detection components according to the utility model; Through on the induction body, hollow-out parts being set; Can make that the path of current path portion of whole induction body is thinner or longer, just being equivalent to has increased L or has reduced h in the R=P*L/h formula, make the resistance R of winning between the electrode and second electrode become big; Thereby obtain the size of the required resistance of accuracy of detection, and then improved the linearity of induction.
The second aspect of the utility model embodiment has also proposed a kind of contactor control device, comprising: touch detection components, said touch detection components is according to the described touch detection components of the utility model first aspect embodiment; And control chip; Said control chip links to each other with second electrode with said first electrode; Said control chip is configured to be used for apply level signal to be created between said first and second electrodes through the mobile electric current of said current path portion to said first electrode and/or second electrode; Be used for charging to the self-capacitance that said induction body produces when being touched through said electric current; Be used for when the induction body that detects at least one said sensing unit is touched; Calculate said first electrode and said second electrode of first resistance between the said self-capacitance and said at least one sensing unit and the proportionate relationship between second resistance between the said self-capacitance of said at least one sensing unit, and be used for confirming the touch location that the induction body of said at least one said sensing unit is touched according to the proportionate relationship between said first resistance and said second resistance.
According to the contactor control device of the utility model, ratio realizes confirming of touch location between first resistance R 1 and second resistance R 2 through calculating, and has improved measuring accuracy, has improved the linearity.
The third aspect of the utility model embodiment has also proposed a kind of portable electric appts, comprises aforesaid touch control detection assembly.
The fourth aspect of the utility model embodiment has also proposed a kind of portable electric appts, comprises aforesaid contactor control device.
Additional aspect of the utility model 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 obviously with are easily understood becoming the description of embodiment from combining figs, wherein:
Fig. 1 is the structural drawing that a kind of traditional self-capacitance formula touches detection components;
Fig. 2 a is the structural drawing that another kind of traditional self-capacitance formula touches detection components;
Fig. 2 b is the detection schematic diagram that another kind of traditional self-capacitance formula touches detection components shown in Fig. 2 a;
Fig. 3 is the detection principle schematic of the contactor control device of the utility model embodiment;
Fig. 4 is the touch detecting method process flow diagram of the contactor control device of the utility model embodiment;
Fig. 5 is the synoptic diagram of the contactor control device of an embodiment of the utility model, and wherein responding to body is rectangle;
Fig. 6-Figure 17 is the synoptic diagram according to the different examples of the touch detection components of an embodiment of the utility model, and wherein responding to body is rectangle;
Fig. 1 8-Figure 29 is the synoptic diagram according to the different examples of the touch detection components of another embodiment of the utility model, and it is L shaped for substantially wherein to respond to body;
Figure 30-Figure 41 is the synoptic diagram according to the different examples of the touch detection components of another embodiment of the utility model, wherein responds to body and is the cardinal principle U-shaped;
Figure 42 is the synoptic diagram according to the touch detection components of another embodiment of the utility model;
Figure 43 is the synoptic diagram according to the touch detection components of the utility model another one embodiment;
Synoptic diagram when Figure 44 is touched for the sensing unit according to the touch detection components of an embodiment of the utility model is wherein responded to body and is U-shaped substantially; And
Synoptic diagram when Figure 45 is touched for the sensing unit according to the touch detection components of an embodiment of the utility model, it is L shaped for substantially wherein to respond to body.
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.
In the description of the utility model; It will be appreciated that; The orientation of indications such as term " " center ", " vertically ", " laterally ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", " outward " or position relation are for based on orientation shown in the drawings or position relation; only be to describe with simplifying for the ease of describing the utility model; rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction to the utility model.In addition, term " first ", " second " only are used to describe purpose, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more a plurality of these characteristics can be shown or impliedly comprised to the characteristic that is limited with " first ", " second " clearly.In the description of the utility model, except as otherwise noted, the implication of " a plurality of " is two or more.
In the description of the utility model, need to prove that only if clear and definite regulation and qualification are arranged in addition, term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be to be fixedly connected, also can be to removably connect, or connect integratedly; Can be mechanical connection, also can be to be electrically connected; Can be directly to link to each other, also can link to each other indirectly through intermediary, can be the connection of two element internals.For those of ordinary skill in the art, can concrete condition understand the concrete implication of above-mentioned term in the utility model.
In the utility model; Only if clear and definite regulation and qualification are arranged in addition; First characteristic second characteristic it " on " or D score can comprise that first and second characteristics directly contact, can comprise that also first and second characteristics are not directly contacts but through the contact of the additional features between them.And, first characteristic second characteristic " on ", " top " and " above " comprise first characteristic directly over second characteristic and oblique upper, or only represent that the first characteristic level height is higher than second characteristic.First characteristic second characteristic " under ", " below " and " below " comprise first characteristic directly over second characteristic and oblique upper, or only represent that the first characteristic level height is less than second characteristic.
Detection principle according to the contactor control device of the embodiment of the utility model second aspect is at first described below.Contactor control device according to the utility model embodiment comprises touch detection components 100 and control chip 200; As shown in Figure 5; Touch detection components 100 and comprise substrate 1 and be located at the sensing unit 2 on the substrate 1, wherein sensing unit 2 comprises induction body 20 and first electrode 21 and second electrode 22 that link to each other with induction body 20.As shown in Figure 5, be the contactor control device synoptic diagram of an embodiment of the utility model.In the embodiment of the utility model, if any a plurality of sensing units 2, can be parallel to each other between then disjoint sensing unit 2, also can be partly parallel between perhaps disjoint sensing unit 2.In the embodiment of the utility model, substrate 1 can be single layer substrate.But need to prove at this; For a plurality of sensing units 2, do not limit it and be the structure of Fig. 5, this sensing unit 2 also can adopt other structure; For example sensing unit 2 a part or all have certain radian etc., these all can be applicable in the utility model.
Control chip 200 links to each other with second electrode 22 with first electrode 21 respectively; Control chip 200 is configured to be used for apply level signal to be created in the electric current that flows through current path portion 25 between first electrode 21 and second electrode 22 to first electrode 21 and/or second electrode 22; Be used for charging to the self-capacitance that induction body 20 produces when being touched through electric current; Be used for when the induction body 20 that detects at least one sensing unit 2 is touched; Calculate first electrode 21 and second electrode 22 of first resistance between the self-capacitance and at least one sensing unit 2 and the proportionate relationship between second resistance between the self-capacitance of at least one sensing unit 2, and be used for confirming the touch location that the induction body 20 of at least one sensing unit 2 is touched 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 touching detection components control chip 200 and confirm that according to first detected value and second detected value corresponding sensing unit is touched; Then touch detection components control chip 200 calculates first resistance and second resistance according to first detected value and second detected value proportionate relationship; 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 2 of correspondence.Touch detection components control chip 200 at last and just can confirm that according to touch location on the first direction and the touch location on the second direction touch point is in the position that touches on the detection components.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 2, then in turn it carried out discharge examination again with the mode of scanning; In another embodiment, can one by one sensing unit 2 be charged and discharge, for example, with that it is carried out discharge examination, after this sensing unit 2 is finished dealing with, more next sensing unit 2 is handled after 2 chargings of a sensing unit.In an embodiment of the utility model; Touch detection components control chip 200 and apply level signal with to the self-capacitance charging, touch detection components control chip 200 and charge detection to obtain the first charging detected value and the second charging detected value from first electrode 21 and/or second electrode 22 to first electrode 21 and second electrode 22 of sensing unit 2.
Particularly; The contactor control device of the utility model embodiment adopts novel self-capacitance formula detection mode; When sensing unit is touched; The place produces self-capacitance in the touch point of sensing unit, and the touch point can be divided into two resistance with 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.Fig. 3 is the detection principle schematic of the contactor control device of the utility model embodiment.When finger during 300 touch sensing unit, will be equivalent to sensing unit is divided into the first and second two resistance R 1, R2, the proportionate relationship between the resistance of first resistance R 1 and second resistance R 2 is relevant with touch point position.For example, of Fig. 3, when touch point and first electrode 21 were nearer, then first resistance R 1 was just less, and second resistance R 2 is just bigger; Anyway, when touch point and second electrode 22 were nearer, then first resistance R 1 was just bigger, and second resistance R 2 is just less.Therefore, just can confirm the position of touch point on sensing unit 2 through detection to first resistance R 1 and second resistance R 2.
In the embodiment of the utility model; Can detect the resistance value of first resistance R 1 and second resistance R 2 in several ways; In the detected value of the level signal of detected value that for example can be through electric current, the detected value of self-capacitance, self-capacitance and the change in electrical charge detection values of self-capacitance one or more, thus first resistance R 1 and second resistance R 2 obtained according to these detected values.In addition; In the embodiment of the utility model; The detection of above-mentioned detected value can be carried out (obtaining the first charging detected value and the second charging detected value) when self-capacitance is charged, also can when self-capacitance discharges, 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.
Need to prove that at least one in charging and the discharge carried out from first electrode 21 and second electrode 22, thereby can obtain to react two detected values of difference between first resistance and second resistance, i.e. first detected value and second detected value.That is to say, when charge or discharge, need electric current through first resistance R 1 and second resistance R 2, thereby detected first detected value and second detected value can react the difference between first resistance R 1 and second resistance R 2.
In the embodiment of the utility model, need fill twice electricity usually and carry out twice detection, charging comprises the situation of charging from first electrode 21 and second electrode 22 simultaneously.In certain embodiments, can also carry out twice discharge.For convenience's sake, all be to carry out twice charging and twice detection in following embodiment.Need to prove that 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 R 1 according to primary charging detected value and secondary charging detected value afterwards, calculate second resistance R 2 according to primary charging detected value and charging detected value for the third time again.
Particularly, the embodiment according to the utility model includes but not limited to that following several kinds of concrete metering systems detect:
1, earlier applies level signal with to self-capacitance charging (said self-capacitance sensing unit be touched generation) to first electrode 21 of sensing unit and second electrode 22; Then charge and detects to obtain the first charging detected value and second detected value that charges from first electrode 21 and/or second electrode 22.In this embodiment,, therefore detect and to detect from first electrode 21, also can detect, perhaps detect respectively from first electrode 21 and second electrode 22 from second electrode 22 because charging is carried out from first electrode 21 and second electrode 22.Also need to prove; In this embodiment; Can carry out simultaneously from the charging of first electrode 21 and second electrode 22, also can carry out separately respectively, for example first electrode 21 and second electrode 22 applied level signal same simultaneously so that self-capacitance is charged; In other embodiments, the level signal that first electrode 21 and second electrode 22 is applied also can be different; Perhaps, also can on first electrode 21, apply a level signal earlier, on second electrode 22, apply level signal same or different level signals more afterwards.Likewise, can carry out simultaneously, also can carry out respectively from the detection of first electrode 21 and second electrode 22.Among the embodiment below, detect with charging and can carry out simultaneously, perhaps carry out respectively.
2, first electrode 21 or second electrode 22 to sensing unit applies level signal at twice so that self-capacitance is carried out twice charging; After each charging, detect to obtain the first charging detected value and the second charging detected value from first electrode 21 and/or second electrode 22.In this embodiment, because charging is carried out from first electrode 21 or second electrode 22, therefore detection need be carried out respectively from first electrode 21 and second electrode 22, wherein, can carry out simultaneously from the detection of first electrode 21 and second electrode 22, also can carry out respectively.In addition, alternatively, can also carry out twice charging at first electrode 21, and carry out twice detection, perhaps, carry out twice charging, carry out twice detection at second electrode 22 from second electrode 22 from first electrode 21.From the charging of twice at an electrode time, 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 is carried out twice when charging when first electrode 21 to sensing unit; Wherein, With said second electrode, 22 ground connection, in another time charging process said second electrode 22 connect and be high resistant in the charging process in twice charging; When second electrode 22 to sensing unit applies level signal respectively for twice self-capacitance being carried out twice when charging, with said first electrode, 21 ground connection, in another time charging process said first electrode 21 connect and be high resistant in the charging process in twice charging.Even carried out twice charging at first electrode 21 like this; Because the change of second electrode, 22 states; 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 21.
3, first electrode 21 and second electrode 22 to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode 21 and/or second electrode, 22 ground connection 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 21 and/or second electrode 22 afterwards.In this embodiment, because charging is carried out from first electrode 21 and second electrode 22 to self-capacitance, therefore discharge or detection just can be carried out from first electrode 21 and/or second electrode 22.Particularly, for example can apply level signal so that self-capacitance is charged to first electrode 21 and second electrode 22 simultaneously, perhaps also can not apply level signal simultaneously.Can be when twice discharge all with first electrode, 21 ground connection, perhaps all with second electrode, 22 ground connection.
4, first electrode 21 or second electrode 22 to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode 21 and second electrode, 22 ground connection 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 21 and/or second electrode 22 respectively afterwards.In this embodiment, because discharge is carried out from first electrode 21 and second electrode 22 to self-capacitance, therefore charging or detection just can be carried out from first electrode 21 and/or second electrode 22.In this embodiment, twice charging also can all be carried out from first electrode 21, and with second electrode 22 ground connection or connect and be high resistant respectively.Likewise, twice charging also can all be carried out from second electrode 22, and with first electrode 21 ground connection or connect and be high resistant respectively.
5, first electrode 21 or second electrode 22 to sensing unit applies level signal so that self-capacitance is charged; Then control first electrode 21 or second electrode, 22 ground connection 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 21 and second electrode 22 respectively afterwards.In this embodiment, because detection is carried out from first electrode 21 and second electrode 22 to self-capacitance, so charge or discharge can be carried out from first electrode 21 and/or second electrode 22.In this embodiment, twice charging also can all be carried out from first electrode 21, and with second electrode 22 ground connection or connect and be high resistant respectively.Likewise, twice charging also can all be carried out from second electrode 22, and with first electrode 21 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 R 1 and second resistance R 2 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 21 is identical with the function of second electrode 22, and the two can exchange, therefore in the above-described embodiments; Both can detect also and can detect, electric current arranged through first resistance R 1 and second resistance R 2 as long as can satisfy when detecting from first electrode 21 from second electrode 22.
From foregoing description, can find out; Above-mentioned charging and detection mode for the utility model embodiment have a variety of variations; But the embodiment of the utility model is that according to the relation between first resistance R 1 and second resistance R 2 for example perhaps other concern to confirm touch point position to proportionate relationship.Further, the relation between first resistance R 1 and second resistance R 2 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, the data that therefore detect self-capacitance can be very little, do not satisfy the Rule of judgment that touches; For this; Constantly scanning in the embodiment of the utility model waits for that finger 300 just begins to calculate after touching sensing unit, repeats 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 embodiment, those skilled in the art also can expand according to above-mentioned thought, modification and modification.
Fig. 4 is the touch detecting method process flow diagram of the contactor control device of the utility model embodiment, together describes below in conjunction with schematic diagram shown in Figure 3.Touch detecting method may further comprise the steps:
Step S401 applies level signal to the two ends of sensing unit, and promptly first electrode 21 and/or second electrode 22 to sensing unit applies level signal.In this embodiment, can apply level signal same, also can apply different level signals to first electrode 21 and second electrode 22.In other embodiments, also can only charge twice, perhaps charge from second electrode 22 second time from 21 chargings of first electrode for the first time, perhaps charge from first electrode 21 for the second time from 22 chargings of second electrode for the first time from first electrode 21 or second electrode 22.
If this moment, 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 capacitive detection module CTS to detect from first electrode 21 and second electrode 22 simultaneously if apply level signal simultaneously to the two ends of sensing unit.And if apply to the two ends of sensing unit respectively, then only need a capacitive detection module CTS to get final product.In an embodiment of the utility model, first detected value and second detected value can be for from first electrode 21 and/or second electrode, 22 detected capacitance charge variation delta Q1 and Δ Q2.Through Δ Q1 and Δ Q2, promptly detect the change in electrical charge amount of self-capacitance, just can calculate the ratio of resistance R 1 and R2, thereby 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 can react other detected values that first resistance R 1 and second resistance R 2 concern, for example level signal, electric current etc. also all can adopt.In the embodiment of the utility model, can carry out simultaneously from the detection that first electrode 21 and second electrode 22 carry out, also can carry out respectively.
In an embodiment of the utility model, carry out simultaneously if detect, then need two capacitive detection module CTS simultaneously first electrode 21 and second electrode 22 to be detected.
In another embodiment of the utility model; Also can adopt a capacitive detection module CTS to detect; In step S401, after being full of through 21 couples of self-capacitance C1 of first electrode, promptly this capacitive detection module CTS detects through 21 couples of self-capacitance C1 of first electrode.Then again through 22 pairs of self-capacitance C2 chargings of second electrode, then this capacitive detection module CTS detects through 22 couples of self-capacitance C1 of second electrode again.
Because the phase place that adopts during this sensing unit of control chip 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 21 of sensing unit and the change in electrical charge amount of 22 pairs of sensing units detections of second electrode acquisition.In the embodiment of the utility model, capacitive detection module CTS can be known capacitive detection module CTS at present.In an embodiment of the utility model,, then, therefore can not increase the overall power of control chip because two capacitive detection module CTS can shared a plurality of devices if adopt two capacitive detection module CTS.
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 that touch detection components, and the size of sensing unit is confirmed.
Step S404; Be touched if judge this sensing unit, then first resistance between first electrode 21 and said self-capacitance and the proportionate relationship between second resistance between said second electrode 22 and said self-capacitance described in the corresponding sensing unit of further calculating this moment.And according to the definite touch location that touches object (for example finger) of the proportionate relationship between first resistance and said second resistance.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 21 and/or second electrode 22 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).
In the embodiment of the utility model, if the induction body of sensing unit is a cardinal principle U-shaped or L shaped substantially, then just can confirm the touch location on the induction body through the ratio between first resistance and second resistance, below will combine concrete example to detail.But in other embodiment of the utility model; If the induction body is a general rectangular; Then step S404 can only calculate the touch location on the first direction on the induction body of sensing unit, and this first direction can be the length direction (the for example horizontal direction of sensing unit) of induction body.
If the induction body is a rectangle, then also need confirm the touch location on second direction.In an embodiment of the utility model, first direction is the length direction of induction body, and second direction is the direction perpendicular to first direction, and the induction body is horizontally disposed with or vertically is provided with.
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 need more than the essential spacing of concrete sensing unit, determine the position of finger (or other capacitive object).The contact area 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:
N Cent = n i - 1 ( i - 1 ) + n i i + n i + 1 ( i + 1 ) n i - 1 + n i + n i + 1
Wherein, N CentBe the label of center sensing unit, n is the number that detects the sensing unit that is touched, and i is the sequence number of sensing unit of being touched, and wherein i is more than or equal to 2.
For example, when finger touch at article one passage, its capacitance change is y1, the capacitance change on the second passage is that the capacitance change on y2 and the 3rd passage is when being y3.Wherein second channel y2 capacitance change is maximum.The Y coordinate just can be at last:
Y = y 1 * 1 + y 2 * 2 + y 3 * 3 y 1 + y 2 + y 3 .
The embodiment of the utility model first aspect has proposed a kind of touch detection components according to above-mentioned thought.Following with reference to the touch detection components 100 of figure 6-Figure 41 description according to the utility model embodiment.
Touch detection components 100 according to the utility model embodiment comprises: substrate 1 and a plurality of sensing units 2.Wherein a plurality of sensing units 2 are located on the substrate 1 and mutually disjoint.In the embodiment of the utility model, preferably, can be parallel to each other between disjoint sensing unit 2.Alternatively, also can be partly parallel between disjoint sensing unit 2, but at least on substrate 1 sensing unit 2 mutually disjoint.But need to prove at this; For a plurality of sensing units 2, be not limited to structure shown in Figure 5, sensing unit 2 also can adopt other structure; For example sensing unit 2 a part or all have certain radian etc., these all can be applicable in the utility model.
Alternatively, substrate 1 is a general rectangular.Here " general rectangular " be interpreted as the relative edge of substrate 1 can portion's absolute parallel, for example can become a little angle, and each limit of substrate 1 can not be absolute straight.Each sensing unit 2 comprises induction body 20 and first electrode 21 and second electrode 22 that link to each other with induction body 20 respectively.First electrode 21 links to each other with the corresponding pin of control chip 200 respectively with second electrode 22.Induction body 20 has a plurality of hollow-out parts 24; A plurality of hollow-out parts 24 are arranged on induction body 20, to limit the current path portion 25 that is used to increase the resistance R between first electrode 21 and second electrode 22 with pre-defined rule, and this current path portion 25 is used for the walking of electric current.Preferably, hollow-out parts 24 connects along the thickness direction of induction body 20, because the thickness of induction body 20 is smaller, hollow-out parts 24 connects induction body 20 and is convenient to make and produce.
Through on induction body 20, hollow-out parts 24 being set; Can make that the path of current path portion 25 of whole induction body 20 is thinner or longer; The L that is equivalent in the R=P*L/h formula increases or the h minimizing; Make the resistance R of winning between the electrode 21 and second electrode 22 become big, thereby obtain the size of the resistance that accuracy of detection meets the demands, and then improved the linearity of induction.Wherein, the size of the pattern of hollow out or lines and density degree all can influence the size of resistance R.In order not influence self-capacitance; The pattern of hollow out or lines are thin as far as possible; Because becoming, the relative area that needs finger to contact with the induction body increases self-capacitance greatly; If the pattern of hollow out or lines are too thick, can reduce to point and respond to the relative area of body, thereby influence the self-capacitance variable quantity of finger touch.
It will be appreciated that in the description of the utility model, a plurality of hollow-out parts 24 are arranged with pre-defined rule should do broad understanding, that is, a plurality of hollow-out parts 24 are arranged in the array of reservation shape on induction body 20.For example, alternatively, a plurality of hollow-out parts 24 can be turned up the soil along the length each interval of induction body 20 and are arranged to linear array; Alternatively, a plurality of hollow-out parts 24 comprise the hollow-out parts of two kinds of shapes on the length direction that alternately is located at the induction body.Particularly, induction body 20 and hollow-out parts 24 are with describing in detail among a plurality of embodiment below.
In an embodiment of the utility model; Induction body 20 is for general rectangular and have first end (i.e. the left end of rectangle among the figure) and second end (i.e. the right-hand member of rectangle among the figure), and first electrode 21 links to each other with first end of induction body 20 and second electrode 22 links to each other with second end of induction body 20.In this embodiment because the figure of rectangular configuration rule, therefore finger laterally or when vertically moving the linearity good, in addition, the spacing between two rectangular configuration can be identical, is convenient to calculate, thereby improves computing velocity.
In an embodiment of the utility model, preferably, hollow-out parts 24 is evenly spaced apart arrangement; For example, when induction body 20 was rectangle, hollow-out parts 24 was evenly arranged spaced apart along the length direction of induction body 20; Also can be called: the direction that hollow-out parts 24 is extended on induction body 20 along current path portion 25 is evenly spaced apart; Can increase the linearity thus, be convenient to calculate, and computing velocity and precision raising.
In another embodiment of the utility model; Induction body 20 comprises first body 201 and second body 202; First body 201 and second body 202 can be rectangle and claim predetermined angle; For example first body 201 and second body 202 can be orthogonal L shaped substantially (below abbreviate L shaped induction body as) to form; Second end of first body 201 links to each other with first end of second body 202, and first electrode 21 links to each other with first end of first body 201 and second electrode 22 links to each other with second end of second body 202.As stated, first body 201 and second body 202 can be orthogonal.Thus, make the sensing unit design regular more, thereby improve coverage rate, and also can improve the linearity of detection the touch detection components.Alternatively, first body 201 and second body 202 measure-alike, thus can improve arithmetic speed.
In another embodiment of the utility model, induction body 20 comprises first to the 3rd body 201,202,203.First body 201 and second body 202 are connected to the two ends of the 3rd body 203 and are positioned at the same side of the 3rd body 203, first body 201 and second body 202 respectively with 203 one-tenth predetermined angulars of the 3rd body.Preferably, first to the 3rd body 201,202,203 can be rectangle, first body 201 and second body 202 respectively with the 3rd body 203 quadratures (below abbreviate substantially U-shaped induction body as).First electrode 21 links to each other with first end of first body 201 and second electrode 22 links to each other with second end of second body 202.Thus, make the sensing unit design regular more, thereby improve coverage rate, and can improve the linearity of detection the touch detection components.Alternatively, first body 201 and second body 202 measure-alike, thus can improve arithmetic speed.
Touch detection components 100 according to the induction body 20 with general rectangular of the utility model embodiment at first describing with reference to figure 6-Figure 17 below describes.
Induction body 20 has first end and second end; First electrode 21 links to each other with first end of induction body 20; Second electrode 22 links to each other with second end of induction body 20, and current path portion 25 extends between first and second ends with curve mode, so that the length L of current path portion 25 is greater than the length of induction body 20 on the bearing of trend of current path portion 25; Promptly increase flow of current length, thereby increase the resistance of induction body 20.When for example responding to body 20 for rectangle; Its length direction is the direction of first end to the second end; Like Fig. 7-shown in Figure 10; First electrode 21 is connected first end (i.e. the left end of rectangle among the figure) of induction body 20, and second electrode 22 is connected second end (i.e. the right-hand member of rectangle among the figure) of induction body 20, and wherein the current flowing direction is in the drawings shown in arrow.
Touch detection components 100 according to the utility model embodiment; Through the hollow-out parts 24 on the induction body 20 is set; Make that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big, improved the linearity of induction thus.
Embodiment one,
In the present embodiment; A plurality of hollow-out parts 24 are divided into along the linearly aligned first group of 24a of bearing of trend and second group of 24b; Hollow-out parts 24b in hollow-out parts 24a in first group and second group alternately arranges on bearing of trend and is overlapping on the direction top that is orthogonal to bearing of trend; In other words; Each of hollow-out parts 24a in first group is arranged between adjacent two the hollow-out parts 24b in second group; The coboundary of the self-induction body 20 on the Width of induction body 20 of the hollow-out parts 24a in first group extends towards the lower limb of induction body 20; And the hollow-out parts 24a in first group is spaced apart with the lower limb of induction body 20; Hollow-out parts 24b in second group extends towards the coboundary of induction body 20 at the lower limb of the Width self-induction body 20 of induction body 20, and the hollow-out parts 24b in second group is spaced apart with the coboundary of induction body 20, and the hollow-out parts 24a in first group looks greater than the width of induction body 20 and from the length direction of responding to body 20 with the length sum of hollow-out parts 24b in second group and overlaps.
In first example of the utility model embodiment, each hollow-out parts 24 can be rectangle, and is as shown in Figure 6.That is to say that in these examples, first group of hollow-out parts 24a and second group of hollow-out parts 24b are respectively a plurality of isolated rectangles, on left and right directions, replace layout and overlapping on above-below direction top.Certainly, the utility model is not limited to this, and in other examples, each hollow-out parts 24 also can be I-shaped substantially or cardinal principle H shape, schemes not shown.
In some examples of the utility model embodiment, each among first group of hollow-out parts 24a is inverted T-shaped substantially, and among second group of hollow-out parts 24b each is T shape substantially.That is to say; As shown in Figure 7; In first group substantially the hollow-out parts 24a of inverted T-shaped on left and right directions, be spaced apart from each other, in second group substantially the hollow-out parts 24b of T shape on left and right directions, be spaced apart from each other, with first group in hollow-out parts 24a arranged alternate and overlapping on above-below direction top.
Alternatively; The upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20; And the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; This moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Fig. 7, electric current flows along curve, makes that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.Certainly, the utility model is not limited to this.Alternatively, the upper end of first group of hollow-out parts 24a also can be connected with the coboundary of induction body 20, and the lower end of second group of hollow-out parts 24b correspondingly is connected (scheming not shown) with the lower limb of induction body 20.
In other examples of the utility model embodiment; Among first group of hollow-out parts 24a each is L shaped substantially; And each among second group of hollow-out parts 24b is 7 fonts substantially; It is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute, each to the L shaped hollow-out parts 24a of the cardinal principle in the hollow-out parts 24 and 7 font hollow-out parts 24b substantially against each other, arranged in a crossed manner and overlapping on bearing of trend on bearing of trend top.That is to say; As shown in Figure 8; The L shaped hollow-out parts 24a of cardinal principle in first group is spaced apart from each other on left and right directions; Cardinal principle 7 font hollow-out parts 24b in second group are spaced apart from each other on left and right directions and are many to hollow-out parts respect to one another to form with hollow-out parts 24a arranged crosswise in first group, and the hollow-out parts 24a of every centering and 24b are overlapping on above-below direction top.
Alternatively; The upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20; And the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; This moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Fig. 8, electric current flows along curve, makes that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.Certainly, the utility model is not limited to this.Alternatively, the upper end of first group of hollow-out parts 24a also can be connected with the coboundary of induction body 20, and the lower end of second group of hollow-out parts 24b correspondingly is connected (scheming not shown) with the lower limb of induction body 20.
In some examples of the utility model embodiment; Hollow-out parts 24a in first group is the cardinal principle inverted V-shaped; Hollow-out parts 24b in second group is a V-arrangement substantially, each the hollow-out parts 24a in first group on bearing of trend across two adjacent branches of adjacent two the hollow-out parts 24b in second group.That is to say; As shown in Figure 9; The hollow-out parts 24a of the cardinal principle inverted V-shaped in first group is spaced apart from each other on left and right directions, the hollow-out parts 24b of the cardinal principle V-arrangement in second group on left and right directions, be spaced apart from each other and with first group in hollow-out parts 24a arranged alternate so that the hollow-out parts 24a in first group on the left and right directions across two branches that are arranged in adjacent two hollow-out parts 24b of second group below it.
Wherein, The upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20; And the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; This moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Fig. 9, electric current flows along curve, makes that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.
In some examples of the utility model embodiment; Among first group of hollow-out parts 24a each is F shape substantially; And each among second group of hollow-out parts 24b is the shape of falling F substantially; And it is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute, each to the cardinal principle F shape hollow-out parts in the hollow-out parts 24 with the shape of falling F hollow-out parts is arranged in a crossed manner and overlapping on bearing of trend top on bearing of trend substantially.That is to say; Shown in figure 10; The hollow-out parts 24a of the cardinal principle F shape in first group is spaced apart from each other on left and right directions; The hollow-out parts of the shape of falling F substantially 24b in second group is spaced apart from each other on left and right directions and is many to hollow-out parts respect to one another to form with hollow-out parts 24a arranged crosswise in first group, and the hollow-out parts 24a of every centering and 24b are overlapping on above-below direction top.
Alternatively; The upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20; And the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; This moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Figure 10, electric current flows along curve, makes that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.Certainly, the utility model is not limited to this.Alternatively, the upper end of first group of hollow-out parts 24a also can be connected with the coboundary of induction body 20, and the lower end of second group of hollow-out parts 24b correspondingly is connected (scheming not shown) with the lower limb of induction body 20.
Embodiment two,
In the present embodiment; Induction body 20 has first end and second end; First electrode 21 links to each other with first end of induction body 20; Second electrode 22 links to each other with second end of induction body 20, and current path portion 25 extends between first and second ends so that the length L of current path portion 25 is greater than the length of induction body 20 on the bearing of trend of current path portion 25 with curve mode.
Wherein, Current path portion 25 extends between first end and second end and is being orthogonal to sectional area on the plane of its bearing of trend less than induction body 20 sectional area in the plane; In other words, the width h of current path portion 25 on above-below direction is less than the width of induction body 20.For example when induction body 20 is rectangle; Its length direction is the direction of first end to the second end; Like Figure 10-shown in Figure 14; First electrode 21 is connected first end (i.e. the left end of rectangle among the figure) of induction body 20, and second electrode 22 is connected second end (i.e. the right-hand member of rectangle among the figure) of induction body 20, and wherein the current flowing direction is in the drawings shown in arrow.
Touch detection components 100 according to the utility model embodiment; Through the hollow-out parts 24 on the induction body 20 is set; Make the longer and width in the path of current path portion 25 reduce; Just in the R=P*L/h formula, increase length L and reduced width h simultaneously, thereby increased the resistance R between first electrode 21 and second electrode 22, improved the linearity of induction thus.
In the example of the utility model embodiment, a side along the bearing of trend extension of current path portion 25 proximity sensing bodies 20.Alternatively, like Figure 11 and shown in Figure 12, hollow-out parts 24 is a cardinal principle T shape or L shaped substantially.Certainly the utility model is not limited to this, and hollow-out parts 24 can also be general rectangular, U-shaped, H shape or other shapes (scheming not shown) such as I-shaped substantially substantially substantially.Alternatively, the top of current path portion 25 proximity sensing bodies 20 and extend along left and right directions, current direction is shown in the direction of arrow among Figure 11 and Figure 12.Certainly, it is following and extend (scheming not shown) along left and right directions that current path portion 25 also can proximity sensing body 20.
In another example of the utility model embodiment, the center line along the bearing of trend extension of current path portion 25 proximity sensing bodies 20.Wherein, A plurality of hollow-out parts 24 are divided into along bearing of trend linearly aligned first group and second group; It is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute; Hollow-out parts 24b in hollow-out parts 24a in first group of each centering and second group is being orthogonal on the direction of bearing of trend against each other, and current path portion 25 is limited between the first hollow-out parts 24a and the second group of hollow-out parts 24b.
Particularly; The upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20; And the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; This moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow in Figure 13 and 14, electric current flows along curve, makes the width of current path portion 25 on above-below direction reduce; Promptly reduced the h in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.
Alternatively; Among first group of hollow-out parts 24a each is T shape substantially, and among second group of hollow-out parts 24b each is inverted T-shaped substantially, and is shown in figure 13; For example; The hollow-out parts 24a of T shape comprises the first arm of approximate horizontal and the second roughly vertical arm substantially, persons of ordinary skill in the art may appreciate that the first arm also can depart from predetermined angular with horizontal direction and second arm can depart from predetermined angular (scheming not shown) with vertical direction.
Alternatively, each among first group of hollow-out parts 24a is L shaped substantially, and among second group of hollow-out parts 24b each is L shaped substantially, shown in figure 14.For example; L shaped hollow-out parts 24a comprises the first arm of approximate horizontal and the second roughly vertical arm substantially; Persons of ordinary skill in the art may appreciate that the first arm also can depart from predetermined angular with horizontal direction and second arm can depart from predetermined angular (scheming not shown) with vertical direction.
Certainly, the utility model is not limited to this.In some examples of the utility model; First group of hollow-out parts 24a respect to one another and second group of hollow-out parts 24b can also be other shapes; As long as the width that can satisfy on above-below direction current path portion 25 reduces; For example general rectangular, U-shaped (for example blind end is that the U-shaped or the blind end of flat line are the U-shaped of arc) substantially; Also for example be H shape or I-shaped, wherein H shape or I-shaped hollow-out parts comprise the first arm and second arm of almost parallel and be connected the first arm and second arm between the 3rd arm, also can for example be other shapes (scheming not shown).
Embodiment three,
In the present embodiment, current path portion 25 is two, a side along the bearing of trend extension of one of them current path portion 25 proximity sensing body 20, another side along the bearing of trend extension of another current path portion 25 proximity sensing bodies 20.Make that thus the total length of current path portion 25 is that the length in flow of current path increases and width reduces.For example when induction body 20 when be rectangle, shown in Fig. 1 5-1 7, the top of one of them current path portion 25 proximity sensing body 20 and extend, and the bottom of another current path portion 25 proximity sensing bodies 20 and extend along left and right directions along left and right directions.
Alternatively, a plurality of hollow-out parts 24 are along the bearing of trend linear array, and each hollow-out parts 24 is the cardinal principle X-shaped, and is shown in figure 15.Certainly, the utility model is not limited to this.In some examples of the utility model; Can also be other shapes along the linearly aligned a plurality of hollow-out parts 24 of bearing of trend; For example general rectangular, cardinal principle U-shaped (scheming not shown), cardinal principle H shape (shown in figure 16) or cardinal principle I-shaped (shown in figure 17) wait other shapes; Maybe can be the combination of above each shape, on induction body 20, form two current path portions up and down as long as can satisfy.
Touch detection components 100 according to the utility model embodiment; Through the hollow-out parts 24 on the induction body 20 is set; Make the longer and width in the path of current path portion 25 reduce; Just in the R=P*L/h formula, increase length L and reduced width h simultaneously, thereby increased the resistance R between first electrode 21 and second electrode 22, improved the linearity of induction thus.
According to the touch detection components 100 of the utility model the foregoing description, can adopt parallel rectangle induction body 20 can reduce the structure complexity of device, thereby can on the basis that guarantees accuracy of detection, reduce manufacturing cost.
The following description with reference to figure 18-Figure 29 has the touch detection components 100 according to a plurality of embodiment of the utility model of L shaped induction body 20.
L shaped induction body 20 has first end (like upper end L shaped among Fig. 1 8-29) and second end (like lower end L shaped among Fig. 1 8-29); Its length direction is to second end from first end; First electrode 21 links to each other with first end of induction body 20; Second electrode 22 links to each other with second end of induction body 20; Current path portion 25 extends between first and second ends with curve mode so that go up the length of the length L of current path portion 25 greater than induction body 20 at the bearing of trend (being the length direction of L shaped induction body) of current path portion 25, the current flowing direction in Figure 18-29 shown in arrow.Touch detection components 100 according to the utility model embodiment; Through the hollow-out parts 24 on the L shaped induction body 20 is set; Make that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big, improved the linearity of induction thus.
For the sake of clarity; In the following description; Second body 202 vertically extends to example and describes with first body, 201 horizontal-extendings of L shaped induction body 20; That is to say that the bearing of trend of first body 201 is the left and right directions among Fig. 1 8-29, and be the above-below direction among the figure with the direction of bearing of trend quadrature; The bearing of trend of second body 202 is the above-below direction among Fig. 1 8-29, and is the left and right directions among the figure with the direction of bearing of trend quadrature.
Embodiment four,
In the present embodiment; A plurality of hollow-out parts 24 are divided into along the linearly aligned first group of 24a of bearing of trend and second group of 24b, and the hollow-out parts 24b in the hollow-out parts 24a in first group and second group alternately arranges on bearing of trend and be overlapping on the direction top that is orthogonal to bearing of trend.
In first example of the utility model embodiment, each hollow-out parts 24 is rectangle, shown in Fig. 18.That is to say; In these examples; First group of hollow-out parts 24a is to be respectively a plurality of isolated rectangles and on the length direction of L shaped induction body, to replace layout and overlapping on the direction top vertical with length direction with second group of hollow-out parts 24b; In other words, on first body 201, first group of hollow-out parts 24a and second group of hollow-out parts 24b replace layout and overlapping on above-below direction top on left and right directions; On second body 202, first group of hollow-out parts 24a and second group of hollow-out parts 24b replace layout and overlapping on left and right directions top on above-below direction.Certainly, the utility model is not limited to this, and in other examples, each hollow-out parts 24 also can be I-shaped substantially or cardinal principle H shape, schemes not shown.
In some examples of the utility model embodiment, each among first group of hollow-out parts 24a is inverted T-shaped substantially, and among second group of hollow-out parts 24b each is T shape substantially.That is to say; As shown in Figure 19; The hollow-out parts 24a of the cardinal principle inverted T-shaped in first group is spaced apart from each other on the length direction of L shaped induction body, the hollow-out parts 24b of the cardinal principle T shape in second group on the length direction of L shaped induction body, be spaced apart from each other and with first group in hollow-out parts 24a arranged alternate and overlapping on the direction top vertical with length direction.In other words; On first body 201; First group of hollow-out parts 24a and second group of hollow-out parts 24b replace layout and overlapping on above-below direction top on left and right directions; At this moment, the upper end of first group of hollow-out parts 24a is connected with the coboundary of first body 201, and the lower end of second group of hollow-out parts 24b is connected with the lower limb of first body 201.On second body 202, first group of hollow-out parts 24a and second group of hollow-out parts 24b replace layout and overlapping on left and right directions top on above-below direction.At this moment, the right-hand member of first group of hollow-out parts 24a is connected with the right hand edge of first body 201, and the left end of second group of hollow-out parts 24b is connected with the left hand edge of first body 201.
Thus; When control chip 200 applies level signal and the electric current that produces flows along curve to first electrode 21 and/or second electrode 22; Make that the path of current path portion 25 is longer; Thereby increased the L in the R=P*L/h formula, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big.
In other examples of the utility model embodiment; Among first group of hollow-out parts 24a each is L shaped substantially; And each among second group of hollow-out parts 24b is 7 fonts substantially; It is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute, each to the L shaped hollow-out parts 24a of the cardinal principle in the hollow-out parts 24 and 7 font hollow-out parts 24b substantially against each other, arranged in a crossed manner and overlapping on bearing of trend on bearing of trend top.That is to say; Shown in figure 20; The L shaped hollow-out parts 24a of cardinal principle in first group is spaced apart from each other on the length direction of L shaped induction body; Cardinal principle 7 font hollow-out parts 24b in second group are spaced apart from each other in the longitudinal direction and are many to hollow-out parts respect to one another to form with hollow-out parts 24a arranged crosswise in first group, and the hollow-out parts 24a of every centering is overlapping on the direction top vertical with length direction with 24b.In other words; On first body 201; The hollow-out parts 24a of every centering and 24b are arranged in a crossed manner and overlapping on above-below direction top on left and right directions; At this moment, the upper end of first group of hollow-out parts 24a is connected with the coboundary of first body 201, and the lower end of second group of hollow-out parts 24b is connected with the lower limb of first body 201.And on second body 202, the hollow-out parts 24a of every centering and 24b are arranged in a crossed manner and overlapping on left and right directions top on above-below direction.At this moment, the right-hand member of first group of hollow-out parts 24a is connected with the right hand edge of first body 201, and the left end of second group of hollow-out parts 24b is connected with the left hand edge of first body 201.
Thus; When control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Figure 20; Electric current flows along curve; Make that the path of current path portion 25 is longer, thereby increased the L in the R=P*L/h formula, and then make the resistance R of winning between the electrode 21 and second electrode 22 become big.
In other examples of the utility model embodiment; Hollow-out parts 24a in first group is the cardinal principle inverted V-shaped; Hollow-out parts 24b in second group is a V-arrangement substantially, each the hollow-out parts 24a in first group on bearing of trend across two adjacent branches of adjacent two the hollow-out parts 24b in second group.That is to say; As shown in Figure 21; On first body 201; The hollow-out parts 24a of the cardinal principle inverted V-shaped in first group about be spaced apart from each other, the hollow-out parts 24b of the cardinal principle V-arrangement in second group on left and right directions, be spaced apart from each other and with first group in hollow-out parts 24a arranged alternate so that the hollow-out parts 24a in first group on the left and right directions across two branches that are arranged in adjacent two hollow-out parts 24b of second group below it.On second body 202; The hollow-out parts 24a of the cardinal principle inverted V-shaped in first group is being spaced apart from each other up and down, the hollow-out parts 24b of the cardinal principle V-arrangement in second group on above-below direction, be spaced apart from each other and with first group in hollow-out parts 24a arranged alternate so that the hollow-out parts 24a in first group on above-below direction across two branches of adjacent two hollow-out parts 24b of second group that are arranged in its left side.
Thus; When control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Figure 21; Electric current flows along curve; Make that the path of current path portion 25 is longer, thereby increased the L in the R=P*L/h formula, and then make the resistance R of winning between the electrode 21 and second electrode 22 become big.
In the other example of the utility model embodiment; Among first group of hollow-out parts 24a each is F shape substantially; And each among second group of hollow-out parts 24b is the shape of falling F substantially; And it is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute, each to the cardinal principle F shape hollow-out parts in the hollow-out parts 24 24 with the shape of falling F hollow-out parts 24 is arranged in a crossed manner and overlapping on bearing of trend top on bearing of trend substantially.That is to say; Shown in figure 22; The hollow-out parts 24a of the cardinal principle F shape in first group is spaced apart from each other on the length direction of L shaped induction body; The hollow-out parts of the shape of falling F substantially 24b in second group is spaced apart from each other on the length direction of L shaped induction body and is many to hollow-out parts respect to one another to form with hollow-out parts 24a arranged crosswise in first group, and the hollow-out parts 24a of every centering is overlapping on the direction top vertical with length direction with 24b.In other words; On first body 201; The hollow-out parts 24a of every centering and 24b are arranged in a crossed manner and overlapping on above-below direction top on left and right directions; At this moment, the upper end of first group of hollow-out parts 24a is connected with the coboundary of first body 201, and the lower end of second group of hollow-out parts 24b is connected with the lower limb of first body 201.And on second body 202, the hollow-out parts 24a of every centering and 24b are arranged in a crossed manner and overlapping on left and right directions top on above-below direction.At this moment, the right-hand member of first group of hollow-out parts 24a is connected with the right hand edge of first body 201, and the left end of second group of hollow-out parts 24b is connected with the left hand edge of first body 201.
Thus; When control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow among Figure 22; Electric current flows along curve; Make that the path of current path portion 25 is longer, thereby increased the L in the R=P*L/h formula, and then make the resistance R of winning between the electrode 21 and second electrode 22 become big.
Embodiment five,
In the present embodiment; Induction body 20 has first end and second end; First electrode 21 links to each other with first end of induction body 20; Second electrode 22 links to each other with second end of induction body 20, and current path portion 25 extends between first and second ends so that the length L of current path portion 25 is greater than the length of induction body 20 on the bearing of trend of current path portion 25 with curve mode.Wherein, Current path portion 25 extends between first end and second end and is being orthogonal to sectional area on the plane of its bearing of trend less than induction body 20 sectional area in the plane; In other words; On first body 201, the width h of current path portion 25 on above-below direction is less than the width of induction body 20.And on second body 202, the width h of current path portion 25 on left and right directions is less than the width of induction body 20
Touch detection components 100 according to the utility model embodiment; Through on induction body 20, hollow-out parts 24 being set; Make the longer and width in the path of current path portion 25 reduce; Just in the R=P*L/h formula, increase length L and reduced width h simultaneously, thereby increased the resistance R between first electrode 21 and second electrode 22, improved the linearity of induction thus.
In the example of the utility model embodiment, a side along the bearing of trend extension of current path portion 25 proximity sensing bodies 20.Alternatively, like Figure 23 and shown in Figure 24, hollow-out parts 24 is a cardinal principle T shape or L shaped.Certainly the utility model is not limited to this, and hollow-out parts 24 can also be rectangle, U-shaped, H shape or other shapes (scheming not shown) such as I-shaped substantially.Alternatively; On first body 201, the top of current path portion 25 proximity sensing bodies 20 and extend along left and right directions is on second body 202; The right of current path portion 25 proximity sensing bodies 20 and extension along the vertical direction, current direction is shown in the direction of arrow among Figure 23 and Figure 24.Certainly; The utility model is not limited to this, in another example, on first body 201; Current path portion 25 also can proximity sensing body 20 following and extend along left and right directions; On second body 202, the left side of current path portion 25 proximity sensing bodies 20 and extension are along the vertical direction schemed not shown.
In another example of the utility model embodiment, the center line along the bearing of trend extension of current path portion 25 proximity sensing bodies 20.Wherein, A plurality of hollow-out parts 24 are divided into along bearing of trend linearly aligned first group and second group; It is how right that first group of hollow-out parts 24a and second group of hollow-out parts 24b constitute; Hollow-out parts 24b in hollow-out parts 24a in first group of each centering and second group is being orthogonal on the direction of bearing of trend against each other, and current path portion 25 is limited between the first hollow-out parts 24a and the second group of hollow-out parts 24b.
Particularly; On first body 201, the upper end of first group of hollow-out parts 24a is connected with the coboundary of induction body 20, and the lower end of second group of hollow-out parts 24b is connected with the lower limb of induction body 20; On second body 202; The right-hand member of first group of hollow-out parts 24a is connected with the right hand edge of second body 202, and the left end of second group of hollow-out parts 24b is connected with the left hand edge of second body 202, this moment when control chip 200 to first electrode 21 and/or second electrode 22 apply level signal and the direction of current that produces shown in the arrow in Figure 25 and 26; Electric current flows along curve; Make the width of current path portion 25 on above-below direction reduce, promptly reduced the h in the R=P*L/h formula, and then make the resistance R of winning between the electrode 21 and second electrode 22 become big.
Alternatively, each among first group of hollow-out parts 24a is T shape substantially, and among second group of hollow-out parts 24b each is inverted T-shaped substantially, and is shown in figure 25.Alternatively, each among first group of hollow-out parts 24a is L shaped substantially, and among second group of hollow-out parts 24b each is L shaped substantially, shown in figure 26.Certainly, the utility model is not limited to this.In some examples of the utility model; First group of hollow-out parts 24a respect to one another and second group of hollow-out parts 24b can also be other shapes; For example rectangle, substantially U-shaped, H shape or other shapes (scheming not shown) such as I-shaped are as long as the width that can satisfy on above-below direction current path portion 25 reduces.
Embodiment six,
In the present embodiment, current path portion 25 is two, a side along the bearing of trend extension of one of them current path portion 25 proximity sensing body 20, another side along the bearing of trend extension of another current path portion 25 proximity sensing bodies 20.Shown in Figure 27-29, on first body 201, one of them current path portion 25 is close to the top of first bodies 201 and extends along left and right directions, and another current path portion 25 is close to the left side of first bodies 201 and extends along left and right directions.On second body 202, the right of current path portion 25 contiguous second bodies 202 and extension along the vertical direction, and the left side of another current path portion 25 contiguous second bodies 202 and extension along the vertical direction.
Alternatively, a plurality of hollow-out parts 24 are along the bearing of trend linear array, and each hollow-out parts 24 is the cardinal principle X-shaped, and is shown in figure 15.Certainly, the utility model is not limited to this.In some examples of the utility model; Can also be other shapes along the linearly aligned a plurality of hollow-out parts 24 of bearing of trend; For example rectangle, substantially U-shaped (scheming not shown), H shape (shown in figure 16) or I-shaped (shown in figure 17) wait other shapes; Also for example can be the combination of above each shape, form two current path portions as long as can satisfy on induction body 20.
Touch detection components 100 according to the utility model embodiment; Through the hollow-out parts 24 on the L shaped induction body 20 is set; Make the longer and width in the path of current path portion 25 reduce; Just in the R=P*L/h formula, increase length L and reduced width h simultaneously, thereby increased the resistance R between first electrode 21 and second electrode 22, improved the linearity of induction thus.
Adopt L shaped induction body 20 in the touch detection components 100 among the utility model embodiment, can reduce noise effectively, improve the linearity of induction.Not only simple in structure, be convenient to make and reduced production cost.
Toply touch detection components 100 with rectangle and L shaped induction body 20 is illustrated for example with reference to figure 6-Figure 29; Yet; Those of ordinary skill in the art is after having read technique scheme, obviously be appreciated that this scheme is applied to other shapes for example substantially in the technical scheme of the induction body 20 of U-shaped that therefore the touch detection components 100 of U-shaped induction body 20 is not described in detail to having substantially at this.
Need to prove that with reference to figure 30-Figure 41, the induction body 20 of U-shaped comprises first to the 3rd body 201,202,203 substantially.First to the 3rd body 201,202,203 can be rectangle.Clear in order to show; With first body 201 of cardinal principle U-shaped induction body 20, second body 202 vertically extends and the 3rd body 203 horizontal-extendings and be that example describes; That is to say; The bearing of trend of first body 201, second body 202 is the above-below direction among Figure 30-41, and is the left and right directions among the figure with the direction of bearing of trend quadrature.The bearing of trend of the 3rd body 203 is the left and right directions among Figure 30-41, and is the above-below direction among the figure with the direction of bearing of trend quadrature.
Wherein shown in Figure 30-34 to be current path portion 25 extend between first and second ends of the induction body 20 of U-shaped substantially so that the length L of current path portion 25 is greater than the length of induction body 20 on the bearing of trend of current path portion 25 with curve mode.Increase the L in the R=P*L/h formula thus, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big, improved the linearity of induction thus.
Shown in Figure 35-3 8 is that current path portion 25 extends between first and second ends so that the length L of current path portion 25 is greater than the length of induction body 20 on the bearing of trend of current path portion 25 with curve mode; And current path portion 25 extends between first end and second end and be orthogonal to sectional area on the plane of its bearing of trend less than induction body 20 sectional area in the plane, makes the longer and width in the path of current path portion 25 reduce.In the R=P*L/h formula, increase L thus and reduced h, and then made the resistance R of winning between the electrode 21 and second electrode 22 become big, improved the linearity of induction thus.
Shown in Figure 39-Figure 41 is that current path portion 25 is two, a side along the bearing of trend extension of one of them current path portion 25 proximity sensing body 20, another side along the bearing of trend extension of another current path portion 25 proximity sensing bodies 20.Make the longer and width in the path of current path portion 25 reduce thus, just in the R=P*L/h formula, increased length L and reduced width h simultaneously, thereby increased the resistance R between first electrode 21 and second electrode 22, improved the linearity of induction thus.
Adopt U-shaped induction body 20 substantially in the touch detection components 100 among the utility model embodiment, not only simple in structure, to be convenient to make, institute is leaded all with on one side, and easy design reduces silver slurry cost and can reduce production cost.
In some embodiment of the utility model; Touch and to comprise a plurality of L shaped sensing units or cardinal principle U-shaped sensing unit 2 in the detection components 100; Promptly comprise a plurality of L shaped induction bodies or cardinal principle U-shaped induction door body 20; Like Figure 42 and shown in Figure 43, the length of each induction door body 20 is different, and is mutually nested between a plurality of induction door bodies 20.In the embodiment of the utility model; The induction body that centers on outside so-called mutually nested being meant correspondingly surrounds inboard induction body; Can when guaranteeing precision, reach bigger coverage rate like this, and reduce the complexity of computing, improve the response speed that touches detection components.Certainly those skilled in the art also can adopt other mutually nested modes to arrange the induction body according to the thought of Figure 42 and Figure 43.
Alternatively, the spacing between adjacent two sensing units 2 equates, the even divisions on both sides that so just can be through 2 pairs of touches of a plurality of sensing units detection components, thereby raising arithmetic speed, and the raising computing velocity, shown in figure 42.
Certainly in another embodiment of the utility model; Spacing between adjacent two sensing units 2 can not wait yet; Shown in figure 43; For example, therefore can the spacing between the sensing unit 2 that touch detection components 100 centres be reduced, thereby improve the accuracy of detection in centre because the user often touches in the centre that touches detection components 100.
Need to prove; Above-mentioned L shaped induction body or cardinal principle U-shaped induction door body 20 are the more excellent embodiment of the utility model; It can obtain bigger coverage rate; But other embodiment of the utility model can carry out the variation that some are equal to Figure 42 and Figure 43, and for example first body 201 and second body 202 in the cardinal principle U-shaped induction door body 20 can be uneven.
Sensing unit 2 in the touch detection components 100 of the utility model embodiment adopts both-end to detect; The two ends that are sensing unit 2 all have electrode; And each electrode all links to each other with the corresponding pin of control chip 200, when touching detection, self can realize the location to the touch point through sensing unit 2.
Advantageously, ratio realizes confirming of touch location to the embodiment of the utility model between first resistance R 1 and second resistance R 2 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 first to the 3rd body of the utility model embodiment therefore with respect to irregular shapes such as present rhombus or triangles, also can improve the linearity further.
It will be appreciated by those skilled in the art that; For sensing unit 2; As long as satisfying, the length of induction body 20 touches the detection components requirement; And two end electrodes links to each other with the different pin of control chip 200 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.
Figure 44 is the synoptic diagram when the U-shaped sensing unit is touched substantially in the touch detection components 100 of the utility model embodiment.Can know that from Figure 44 first electrode is that 21, the second electrodes are 22; Touch location approaches second electrode 22; The length of supposing sensing unit 2 is 10 unit lengths, and sensing unit 2 is divided into 10 parts equably, wherein; The length of the 3rd body 203 of sensing unit 2 is 4 unit lengths, and the length of first body 201 and second body 202 is 3 unit lengths.Through detecting, the ratio of knowing first resistance and second resistance is 4: 1, and promptly the length of first electrode 21 to the touch location (being embodied by first resistance R 1) is 80% of whole sensing unit length.In other words, the touch point is positioned at the position of 8 unit lengths in distance first electrode, 21 places, knows, the touch point is positioned at the position of 2 unit lengths in distance second electrode, 22 places.When finger moved, touch location can correspondingly move, and therefore just can judge finger corresponding mobile track through the conversion of touch location, thus the input instruction of judges.
Can find out from the above example of Figure 44, very simple according to the account form of the touch detection components of the utility model embodiment, therefore can greatly improve and touch the reaction velocity that detection components 100 detects.
Synoptic diagram when Figure 45 is touched for L shaped sensing unit in the touch detection components 100 of the utility model embodiment.Can know that from Figure 45 first electrode is that 21, the second electrodes are 22; Touch location approaches second electrode 22; The length of supposing induction body 20 is 10 unit lengths, and will respond to body and be divided into 10 parts equably, wherein; The length of first body 201 is 5 unit lengths, and the length of second body 202 is 5 unit lengths.Through detection, know that the ratio of first resistance R 1 and second resistance R 2 is 9: 1, promptly the length of first electrode 21 to the touch location (being embodied by first resistance R 1) 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, 21 places, knows, the touch point is positioned at the position of 1 unit length in distance second electrode, 22 places.
As can be seen from Figure 45, very simple according to the account form of the touch detection components of the utility model embodiment, therefore can greatly improve and touch the reaction velocity that detection components detects.
In sum; Contactor control device according to the utility model embodiment; Electrode 21,22 through to sensing unit 2 two ends applies level signal, if this sensing unit 2 is touched, then this sensing unit 2 can form self-capacitance; Therefore can charge to this self-capacitance through the level signal that applies, and confirm the touch location on first direction according to the proportionate relationship between first resistance R 1 and second resistance R 2.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 confirm that further the touch point is in the position that touches detection components through first detected value and second detected value.
Portable electric appts according to the utility model embodiment can comprise the touch detection components of describing with reference to the foregoing description 100.According to the portable electric appts of the utility model embodiment can comprise with reference to the foregoing description describe contactor control device.For example constitute framed structure and control according to other of the portable electric appts of the utility model embodiment and form and wait and operation all is known for those of ordinary skills, be not described in detail here.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " illustrative examples ", " 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; Those having ordinary skill in the art will appreciate that: under the situation of principle that does not break away from the utility model and aim, can carry out multiple variation, modification, replacement and modification to these embodiment, the scope of the utility model is limited claim and equivalent thereof.

Claims (21)

1. one kind touches detection components, it is characterized in that, comprising:
Substrate; With
A plurality of sensing units; Said a plurality of sensing unit is located on the said substrate and mutually disjoints; Each said sensing unit comprises induction body and first electrode and second electrode; Said induction body comprises first body and second body that becomes predetermined angular each other; Second end of said first body links to each other with first end of said second body; Said first electrode links to each other with first end of said first body and said second electrode links to each other with second end of said second body, and said induction body has a plurality of hollow-out parts, and said a plurality of hollow-out parts are arranged to limit the current path portion that is used to increase the resistance between said first and second electrodes on the said induction body with pre-defined rule.
2. touch detection components as claimed in claim 1; It is characterized in that said current path portion extends between second end of first end and said second body of said first body and is being orthogonal to sectional area on the plane of its bearing of trend less than the sectional area of said induction body on said plane.
3. touch detection components as claimed in claim 2 is characterized in that, the side that the said bearing of trend in edge of the contiguous said induction body of said current path portion extends.
4. touch detection components as claimed in claim 3 is characterized in that, said hollow-out parts is rectangle, T shape, U-shaped, H shape, L shaped or I-shaped.
5. touch detection components as claimed in claim 1 is characterized in that, the center line that the said bearing of trend in edge of the contiguous said induction body of said current path portion extends.
6. touch detection components as claimed in claim 5; It is characterized in that; Said a plurality of openwork part is along linearly aligned first group and second group of said bearing of trend; It is how right that said first group of hollow-out parts and said second group of hollow-out parts constitute, and the hollow-out parts in the hollow-out parts in first group of each centering and second group is being orthogonal on the direction of said bearing of trend against each other, and said current path portion is limited between said first and second groups of hollow-out parts.
7. touch detection components as claimed in claim 5 is characterized in that, each in said first group of hollow-out parts is T shape, and in said second group of hollow-out parts each is inverted T-shaped.
8. touch detection components as claimed in claim 5 is characterized in that, each in said first group of hollow-out parts is L shaped, and in said second group of hollow-out parts each is L shaped.
9. touch detection components as claimed in claim 1; It is characterized in that; Said current path portion is two; The side that the said bearing of trend in edge of the contiguous said induction body of one of them current path portion extends, another side that the said bearing of trend in edge of the contiguous said induction body of another current path portion extends.
10. touch detection components as claimed in claim 9 is characterized in that, said a plurality of hollow-out parts are along said bearing of trend linear array, and each said hollow-out parts is X-shaped, H shape or I-shaped.
11. touch detection components as claimed in claim 1; It is characterized in that said current path portion extends in curve mode between second end of first end and said second body of said first body so that in the length of the above current path portion of bearing of trend of the said current path portion length greater than said induction body.
12. touch detection components as claimed in claim 1 is characterized in that, said hollow-out parts connects along the thickness direction of said induction body.
13. touch detection components as claimed in claim 1 is characterized in that, said substrate is a rectangle.
14. touch detection components as claimed in claim 1 is characterized in that, said first body and second body are rectangle,
15. touch detection components as claimed in claim 1 is characterized in that, said first and second bodies are orthogonal.
16. touch detection components as claimed in claim 1 is characterized in that said hollow-out parts is evenly spaced apart arrangement.
17. a contactor control device is characterized in that, comprising:
Touch detection components, said touch detection components is like each described touch detection components among the claim 1-16; With
Control chip; Said control chip links to each other with second electrode with said first electrode; Said control chip is configured to be used for apply level signal to be created between said first and second electrodes through the mobile electric current of said current path portion to said first electrode and/or second electrode; Be used for charging to the self-capacitance that said induction body produces when being touched through said electric current; Be used for when the induction body that detects at least one said sensing unit is touched; Calculate said first electrode and said second electrode of first resistance between the said self-capacitance and said at least one sensing unit and the proportionate relationship between second resistance between the said self-capacitance of said at least one sensing unit, and be used for confirming the touch location that the induction body of said at least one said sensing unit is touched according to the proportionate relationship between said first resistance and said second resistance.
18. contactor control device as claimed in claim 17; It is characterized in that; Proportionate relationship between said first resistance and said second resistance is according to said self-capacitance charge/discharge the time, and first detected value that obtains from said first electrode and/or second electrode detection and the proportionate relationship between second detected value calculate.
19. contactor control device as claimed in claim 17 is characterized in that, said control chip comprises one or two capacitive detection module CTS.
20. a portable electric appts is characterized in that, comprises each described touch detection components like claim 1-16.
21. a portable electric appts is characterized in that, comprises 9 each described contactor control devices like claim 17-1.
CN2012201345443U 2011-07-26 2012-04-01 Touch detection module and touch control device and portable electronic equipment Expired - Lifetime CN202615359U (en)

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CN2011205734681U Expired - Lifetime CN202795312U (en) 2011-07-26 2011-12-31 Touch control device and portable electronic device
CN2011205734658U Expired - Lifetime CN202548805U (en) 2011-07-26 2011-12-31 Touch screen detection equipment, touch device and portable electronic equipment
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CN201210093649.3A Expired - Fee Related CN102902441B (en) 2011-07-26 2012-04-01 Touch detection components, contactor control device and portable electric appts
CN201210093681.1A Expired - Fee Related CN102902443B (en) 2011-07-26 2012-04-01 A kind of touch detection components, contactor control device and portable electric appts
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