CN105897239B - Sensing element and its inducing method - Google Patents
Sensing element and its inducing method Download PDFInfo
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- CN105897239B CN105897239B CN201510731558.1A CN201510731558A CN105897239B CN 105897239 B CN105897239 B CN 105897239B CN 201510731558 A CN201510731558 A CN 201510731558A CN 105897239 B CN105897239 B CN 105897239B
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- control electrode
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
Abstract
A kind of sensing element of present invention offer and its inducing method.A kind of sensing element includes comparator, first switch, second switch and controller.Comparator includes first comparator input terminal and the second comparator input terminal.One end of first switch is coupled with first comparator input terminal, the other end and a coupling in the first touch control electrode and second touch control electrode complimentary to one another；One end of second switch is coupled with the second comparator input terminal, and the other end is selectively coupled with second touch control electrode.Controller controls first switch and second switch.When the first touch control electrode is touched with second touch control electrode, controller control first switch makes first comparator input terminal and the first touch control electrode couple, control second switch makes the second comparator input terminal and second touch control electrode couple, then calculates the first of the first touch control electrode and second touch control electrode by touch location.By applying the present invention, not only reducing manufacturing cost, it can more reduce the area of touch sensing element.
Description
Technical field
Heretofore described embodiment content relates to a kind of sensing element, and being suitable for sense in particular to one kind
Answer the sensing element of touch-control sliding block (slider).
Background technology
The more traditional mechanical key interface of touch sensing control interface can promote user's experience using more intuition
(user experience), due to putting into a large amount of development resources, the manufacturing cost of touch panel also keeps falling in recent years,
More and more electronic products, which change, adopts touch face version as operate interface, and the demand of touch sensing device is also increasingly grown up.
In operate interface application, sliding block (slider) is usually used in needing the application scenarios of Continuous Adjustment numerical value, if to touch
Prosecutor formula realizes sliding block function, need to be accurately positioned out the position that user touches touch sensing element.Traditional touch sliding block
Usually using multiple touch controlled key implementations, each touch controlled key of scan flow is taken turns, and calculates the touching of user with interpolation method
Position.If however, being intended to reach higher precision, the quantity that touch controlled key is significantly increased is needed, thus, can cause to manufacture
The raising of cost.In addition, such touch sliding block needs to control the about the same from capacitance of each touch controlled key in manufacturing process,
Otherwise control precision will be substantially reduced, and increases touch controlled key quantity and then more promotes each touch controlled key of control from capacitance
The difficulty of (self capacitance), further increases process costs.
Invention content
To produce the sensing element for having high accurancy and precision touch sliding block with cheap manufacturing cost, the content of present invention carries
For a kind of sensing element, sensing element includes comparator, first switch, second switch and controller.Comparator includes first
Comparator input terminal and the second comparator input terminal.One end of first switch is coupled with first comparator input terminal, the other end
With a coupling in the first touch control electrode complimentary to one another and second touch control electrode；One end of second switch and the second comparator
Input terminal couples, and the other end is selectively coupled with second touch control electrode.Controller controls first switch and second switch.When
When one touch control electrode is touched with second touch control electrode, controller control first switch makes first comparator input terminal and first touch
Electrode coupling is controlled, control second switch makes the second comparator input terminal be coupled with second touch control electrode, then calculates the first touch-control
The first of electrode and second touch control electrode is by touch location.
In an embodiment, sensing element further includes an at least variable capacitor unit, variable capacitor unit and first
At least one and controller electric property coupling in comparator input terminal and the second comparator input terminal, to be received at least from controller
One adjustment signal, the equivalent capacity of variable capacitor unit is adjusted according to adjustment signal, controller is to according to variable condenser
The equivalent capacity of unit calculates first by touch location.
In an embodiment, variable capacitor unit includes multiple switchable type capacitors, phase between switchable type capacitor
Mutual coupled in parallel, one end of switchable type capacitor selectively to receive adjustment signal, switchable type capacitor it is another
End is commonly coupled at least one in first comparator input terminal and the second comparator input terminal.
In an embodiment, variable capacitor unit also receives drive signal from controller, to pass through drive signal pair
At least one charging in first comparator input terminal and the second comparator input terminal.
In an embodiment, the width non-uniform Distribution of the first touch control electrode and second touch control electrode, controller is to root
First is calculated by touch location according to the width information of the first touch control electrode and second touch control electrode.
In an embodiment, controller control first switch make first comparator input terminal alternately with the first touch control electrode
It with second touch control electrode electric property coupling, and controls second switch and disconnects the second comparator input terminal and second touch control electrode, to sentence
Disconnected first touch control electrode is with second touch control electrode by the state of touching.
In an embodiment, sensing element further includes third switch, one end of third switch and the second comparator input terminal
The other end of coupling, third switch is selectively coupled with the first touch control electrode, and controller makes first to control first switch
Comparator input terminal is coupled with second touch control electrode, and control second switch disconnects the second comparator input terminal and the second touch-control electricity
Pole, control third switch make the second comparator input terminal and the first touch control electrode couple, then calculate the first touch control electrode and the
The second of two touch control electrodes corrects first by touch location by touch location, and using second by touch location.
Another aspect of the content of present invention is a kind of inducing method, is comprised the steps of：It is opened by controller control first
It closes, makes one that the first comparator input terminal of comparator is coupled in the first touch control electrode and second touch control electrode complimentary to one another
It is a, and second switch is controlled, so that the second comparator input terminal of comparator is selectively coupled with second touch control electrode；When first
When touch control electrode is touched with second touch control electrode, controlling first switch by controller makes first comparator input terminal and first
Touch control electrode couples, and controlling second switch makes the second comparator input terminal be coupled with second touch control electrode, and calculates first
The first of touch control electrode and second touch control electrode is by touch location.
In an embodiment, calculate first includes by the step of touch location：It is controlled certainly by variable capacitor unit
Device receive adjustment signal, according to adjustment signal adjust variable capacitor unit equivalent capacity, wherein variable capacitor unit with
Controller electric property coupling, and at least one electric property coupling in first comparator input terminal and the second comparator input terminal；Pass through
Controller calculates first by touch location according to the equivalent capacity of variable capacitor unit.
In an embodiment, include according to the step of equivalent capacity of adjustment signal adjustment variable capacitor unit：Pass through
One end of multiple switchable type capacitors of coupling parallel with one another, which selectively receives, adjusts signal, and switchable type capacitor
The other end couples at least one in first comparator input terminal and the second comparator input terminal jointly.
When the sensing element and inducing method that are provided using the content of present invention, it is only necessary to which a small amount of touch control electrode number reaches
To high-precision touch control operation, manufacturing cost is not only reduced, the area of touch sensing element can be more reduced, allows electronic component volume
Smaller and more lightweight, and promote user's experience of user.
The content of present invention is intended to provide simplifying for the content of present invention and makes a summary, so that reader has substantially the content of present invention
Understanding.The invention content is not the complete overview of the content of present invention, and it is not intended in the weight for pointing out the embodiment of the present invention
It wants (or crucial) element or defines the scope of the present invention.
Description of the drawings
Fig. 1 is to be painted a kind of schematic diagram of sensing element according to first embodiment of the invention；
Fig. 2A to Fig. 2 C is to be painted capacitance and potential change in a kind of sensing element as shown in Figure 1 according to the embodiment of the present invention
Schematic diagram；
Fig. 3 is to be painted a kind of schematic diagram of variable capacitor unit as shown in Figure 1 according to the embodiment of the present invention；And
Fig. 4 is to be painted a kind of flow chart of inducing method according to the embodiment of the present invention.
Drawing reference numeral
100 sensing elements
110 controllers
120 comparators
122 first comparator input terminals
124 second comparator input terminals
132 first touch control electrodes
134 second touch control electrodes
140 first switches
150 second switches
160 thirds switch
400 inducing methods
S410~S440 steps
Specific implementation mode
It is hereafter the embodiment that elaborates, but provided for embodiment cooperation institute accompanying drawings not limiting this hair
Bright covered range, and structure operation description it is non-to limit its execution sequence, any knot reconfigured by element
Structure, it is produced that there is equal and other effects device, it is all the range that the present invention is covered.In addition, schema is only for the purpose of description, and
It maps not according to full size.To make to be easy to understand, similar elements will be illustrated with identical symbology in following the description.
The word (terms) used in full piece specification and claim usually has in addition to having and especially indicating
Each word using in the content disclosed in this area, at this with the usual meaning in special content.It is certain describing this
The word of invention by it is lower or this specification other places discuss, to provide those skilled in the art in description for the present invention
Upper additional guiding.
It is commonly the error of exponential quantity about " about " used herein, " about ", " substantially " or " substantially "
Or range, there are different variations according to different technologies, and its range understands have for those skilled in the art
Broadest interpretation thereby covers all deformations and similar structures.In some embodiments, the error or range of above-mentioned numerical value are
Refer within 20 percent, is preferably within 10, and is more preferably then within 5 percent.Wen Zhongruo without
Clearly state, mentioned by numerical value all regard as approximation, such as can be such as " about ", " about ", " substantially " or " substantially " institute
The error or range or other approximations of expression.
About " first " used herein, " second " etc., the meaning of order or cis-position is not especially censured, also non-use
The element described with same technique term just for the sake of difference with limiting the present invention or operation.
Secondly, used word "comprising" herein, " comprising ", " having ", " containing " etc., are open
Term, that is, mean including but not limited to.
In addition, about " coupling " used herein or " connection ", it can refer to two or more elements and mutually directly make
Entity is in electrical contact, or mutually puts into effect body or in electrical contact indirectly, is also referred to as two or more element mutual operations or dynamic
Make.
Fig. 1 is to be painted a kind of schematic diagram of sensing element according to first embodiment of the invention.As shown in Figure 1, sensing element
100 can be used to incude the touched position of touch control electrode, and can execute corresponding functions or operations (such as according to induction result：Control
Subsequent conditioning circuit processed, output digital data signal etc.).Specifically, user touches touch sliding block (slider), and touch
Sliding block includes more than two touch control electrodes, sensing element 100 and the touch control electrode electric property coupling under touch sliding block, and is used
When person touches touch sliding block, at least two touch control electrodes, the electrical characteristic that sensing element 100 passes through touch control electrode can be touched
Information to obtain the position that user touches touch control electrode, and executes corresponding functions or operations according to position.Shown in Fig. 1
Embodiment in, 134 electric property coupling of sensing element 100 and the first touch control electrode 132 and second touch control electrode.Specifically, originally
Field, which has usual skill, to adjust the touch control electrode number that sensing element 100 is connected according to application demand, and the content of present invention is not
As limit.
Sensing element 100 includes controller 110, comparator 120, first switch 140 and second switch 150.Comparator
120 include first comparator input terminal 122 and the second comparator input terminal 124.One end of first switch 140 is compared with first
Device input terminal 122 couples, the other end of first switch 140 and the first touch control electrode 132 and second touch control electrode complimentary to one another
A coupling in 134.One end of second switch 150 is coupled with the second comparator input terminal 124,150 other end of second switch
Selectively coupled with second touch control electrode 134.Controller 110 controls first switch 140 and second switch 150.When first touch
When control electrode 132 is touched with second touch control electrode 134, controller 110, which controls first switch 140, makes first comparator input terminal
122 and first touch control electrode 132 couple, control second switch 150 make the second comparator input terminal 124 and second touch control electrode
134 couplings, then the first of the first touch control electrode 132 and second touch control electrode 134 is calculated by touch location.
Controller 110 transmits switch control signal SCS to first switch 140 and second switch 150 to control on off state,
In an embodiment, controller 110 is a microcontroller (microcontroller), and first switch 140 is a three-way switch
(three-way switch), second switch 150 are a two-way switch (two-way switch).In another embodiment, control
Device 110 processed is a central processing unit (central processor), and first switch 140 is formed using two two-way switch implementations,
Second switch 150 is two-way switch.Other circuit elements can be used to realize said elements, the present invention for those skilled in the art
Content is not limited to examples cited.
First touch control electrode 132 and second touch control electrode 134 are complimentary to one another, in this present embodiment, the first touch control electrode 132
It is all triangular-shaped electrodes with second touch control electrode 134, display position is symmetrical and about the same from capacitance.This field tool is usually known
The shapes such as the touch control electrode, such as rectangle, chevron (Chevron) of other shapes can be used in the knowledgeable, not by the content of present invention institute
Lift exemplary limitation.
When user touches touch sliding block (slider), the first touch control electrode 132 and second touch control electrode 134 are simultaneously
It is touched, the capacitance of the first touch control electrode 132 and second touch control electrode 134 corresponds to the first touch control electrode 132 and the second touch-control electricity
Pole 134 by touch location generate variation, the first comparator input terminal 122 of comparator 120 or the second comparator input terminal 124 with
134 electric property coupling of first touch control electrode 132 or second touch control electrode, therefore the current potential of 120 input terminal of comparator also generates correspondence
Changing, to receive the output signal CP of comparator 120, the current potential of 120 input terminal of detection comparator changes controller 110, with
It measures capacitance variations and judges by touch location.
Controller 110 controls first switch 140 by first comparator input terminal 122 and first when measuring capacitance variations
Touch control electrode 132 couples, and controls second switch 150 and couple the second comparator input terminal 124 with second touch control electrode 134,
It is tactile to be respectively coupled to complementary first for the first comparator input terminal 122 of comparator 120 and the second comparator input terminal 124 at this time
Electrode 132 and second touch control electrode 134 are controlled, the first touch control electrode 132 and second touch control electrode 134 are complimentary to one another, and suffered makes an uproar
Sound is also identical, therefore when the measurement capacitance variations of controller 110, the first touch control electrode 132 and noise suffered by second touch control electrode 134
It will offset each other, and promote accuracy in measurement, and can reach the essence for the touch sliding block several times realized using multiple touch controlled keys than tradition
Accuracy.For example, for the touch sliding block of same length, tradition only may be used using the touch sliding block of multiple touch controlled keys
Reach the control of about 30 ranks, however, can promote control exponent number to 70~80 ranks using the content of present invention technological thought.Such one
Come, it is only necessary to which a small number of touch control electrodes can be reached by touch sliding block accurately to be controlled, and the face of sensing element 100 is not only reduced
Product more provides more preferably user's experience with cheap cost.
In an embodiment, sensing element 100 further includes variable capacitor unit Cmn and variable capacitor unit Cmp, and two
Person with 110 electric property coupling of controller, to receive adjustment signal CS, variable capacitor unit Cmn and can power transformation from controller 110
Container unit Cmp adjusts equivalent capacity according to adjustment signal CS, in this present embodiment, the ratios of variable capacitor unit Cmn and first
Compared with 122 electric property coupling of device input terminal, 124 electric property coupling of variable capacitor unit Cmp and the second comparator input terminal, controller
The equivalent capacity of 110 adjustment variable capacitor unit Cmn and variable capacitor unit Cmp, and according to variable capacitor unit Cmn
The first touch control electrode 132 is obtained with second touch control electrode 134 because user touches with the equivalent capacity of variable capacitor unit Cmp
Generated capacitance variations, then the first of the first touch control electrode 132 and second touch control electrode 134 is calculated by touch location.With
Under will be described with calculating the capacitance variations of the first touch control electrode 132 and second touch control electrode 134 and calculating first is touched
Touch the details of position.
In an embodiment, variable capacitor unit Cmn and variable capacitor unit Cmp are received from controller 110 and are driven
Signal P, to be charged to first comparator input terminal 122 and the second comparator input terminal 124 by drive signal P.It can power transformation
Container unit Cmn and variable capacitor unit Cmp receives identical drive signal P from controller 110, therefore can further offset
The noise that variable capacitor unit Cmn and variable capacitor unit Cmp are received.
Fig. 2A to Fig. 2 C is to be painted capacitance and potential change in a kind of sensing element as shown in Figure 1 according to the embodiment of the present invention
Schematic diagram.Specifically, as shown in Fig. 1 and Fig. 2A to Fig. 2 C, have with variable capacitor unit Cmn and Cmp default identical
Equivalent capacity for, it is not operating (such as in the first touch control electrode 132 and second touch control electrode 134：First touch control electrode 132 with
Second touch control electrode 134 is without touching) in the case of, current potential VS (i.e. the current potential of first comparator input terminal 122) and current potential VDK
(i.e. the current potential of the second comparator input terminal 124) can be charged to by variable capacitor unit Cmn and Cmp and drive signal P
Same or similar current potential (such as Fig. 2A).
In an embodiment, controller 110, which controls first switch 140, makes first comparator input terminal 122 alternately with the
134 electric property coupling of one touch control electrode 132 and second touch control electrode, and control second switch 150 and disconnect the second comparator input terminal
124 with second touch control electrode 134, to judge that the first touch control electrode 132 and second touch control electrode 134 by the state of touching, are illustrated
For, the alternate cycle that controller 110 controls 140 switching state of first switch is several us.Specifically, in the first touch-control electricity
Pole 132 acts (such as with second touch control electrode 134：First touch control electrode 132 is with second touch control electrode 134 through finger, stylus etc.
Touching) in the case of, one end of the first touch control electrode 132 and second touch control electrode 134 and the coupling of first comparator input terminal 122
Capacitance will produce variation so that current potential VS falls below current potential VDK (such as Fig. 2 B), and controller 110 is then by comparing
Comparator output signal CP caused by device 120 detects that 122 current potential of first comparator input terminal declines, and then judges first
Touch control electrode 132 is touched with second touch control electrode 134.
When controller 110 judges that the first touch control electrode 132 is touched with second touch control electrode 134, first switch is controlled
140 make first comparator input terminal 122 and the first touch control electrode 132 couple, and control second switch 150 makes the second comparator input
Hold 124 and the coupling of second touch control electrode 134, variable capacitor unit Cmn relatively rear more generated according to current potential VS and current potential VDK
Comparator output signal CP is adjusted (such as：Variable capacitor unit Cmn can have relative to variable condenser list after adjusting
Equivalent capacity larger first Cmp), so to first comparator input terminal 122 carry out potential compensation so that current potential VTK again on
Rise (or decline) to current potential VDK same or similar (such as Fig. 2 C), wherein above-mentioned corresponding current potential or capacitance variations can be for rear
The continuous calculation process for carrying out data to judge the position of touch control operation generation, or thereby executes corresponding touch function.
In other embodiments, can also be that variable capacitor unit Cmp is relatively produced afterwards according to current potential VS and current potential VDK
Raw comparator output signal CP is adjusted (such as：Variable capacitor unit Cmp can have relative to variable capacitance after adjusting
Equivalent capacity smaller device unit Cmn), and then potential compensation is carried out to the second comparator input terminal 124 so that under current potential VDK
Drop (or rising) is extremely same or similar with current potential VS.Again or in other examples, variable capacitor unit Cmp and can
Variodenser unit Cmn can be adjusted according to the relatively rear generated comparator output signal CP of current potential VTK and current potential VS respectively,
And then potential compensation is carried out to the second comparator input terminal 124 and first comparator input terminal 122 so that current potential VDK and
Current potential is same or similar after current potential VS is compensated.
Controller 110 generates control signal CS and controls variable capacitor unit to receive comparator output signal CP
Cmn, to adjust the equivalent capacity of variable capacitor unit Cmn so that variable capacitor unit Cmn can correspondingly compare first
Device input terminal 122 carries out potential compensation.In other embodiments, signal CS is controlled to adjust variable capacitor unit Cmp's
Equivalent capacity so that variable capacitor unit Cmp correspondingly can carry out potential compensation to the second comparator input terminal 124.Again again
In some embodiments, adjustment variable capacitor unit Cmp and variable capacitor unit Cmn can also be removed respectively by being control signal CS
Equivalent capacity so that variable capacitor unit Cmp and variable capacitor unit Cmn can correspondingly to the second comparator input
End 124 and first comparator input terminal 122 carry out potential compensation.
In an embodiment of the present invention, " potential compensation " improves the current potential of comparator input terminal in addition to that can refer to, can also
To refer to the current potential for downgrading comparator input terminal, that is, the current potential of comparator input terminal can be increased or decreased through potential compensation.
After carrying out potential compensation, controller 110 is according to variable capacitor unit Cmp's and variable capacitor unit Cmn
Equivalent capacity difference calculates the capacitance difference of the first touch control electrode 132 and second touch control electrode 134.It below will be with Fig. 1 institutes
The embodiment being painted is illustrated, in this embodiment, when user does not touch the first touch control electrode 132 and second touch control electrode
When 134, the first touch control electrode 132 and second touch control electrode 134 it is about the same from capacitance, when user touches the first touch-control electricity
When pole 132 and second touch control electrode 134, the equivalent capacity of the first touch control electrode 132 and second touch control electrode 134 increases simultaneously,
But the equivalent capacity incrementss of the first touch control electrode 132 and second touch control electrode 134 simultaneously differ, due to geometric configuration it is therefore,
When user's touch location more up when, the equivalent capacity incrementss of the first touch control electrode 132 are more, then second touch control electrode
134 equivalent capacity incrementss are fewer, and controller 110 is according to the equivalent electricity of the first touch control electrode 132 and second touch control electrode 134
Tolerance is different to calculate first by touch location.
For example, when the upper limb of the closer second touch control electrode of user's touch location 134 (close to the second touch-control
134 wider portion of electrode), since capacitance is directly proportional to area and is inversely proportional with distance, therefore second touch control electrode 134 is equivalent
Capacitance increase is larger, and the equivalent capacity incrementss of the first touch control electrode 132 are smaller, therefore second touch control electrode 134 is equivalent
Capacitance will be above the first touch control electrode 132；When the lower edge of the closer second touch control electrode of user's touch location 134 (
Close to 134 narrower part of second touch control electrode), the equivalent capacity incrementss of second touch control electrode 134 are smaller, and the first touch-control is electric
The equivalent capacity incrementss of pole 132 are larger, therefore the equivalent capacitance value of second touch control electrode 134 will be less than the first touch control electrode 132.
Controller 110 is in transmission control signal CS to the first variable capacitor unit Cmn and the second variable capacitor unit Cmp to carry out
Potential compensation, then according to the difference of the equivalent capacity of the first variable capacitor unit Cmn and the second variable capacitor unit Cmp
It is different, deduce the difference of the first touch control electrode 132 and the equivalent capacity of second touch control electrode 134, and calculate the first touched position
It sets.
It should be noted, in the embodiment depicted in Fig. 1, the width of the first touch control electrode 132 and second touch control electrode 134
Non-uniform Distribution, with the equivalent capacitance value difference of the first touch control electrode of amplification 132 and second touch control electrode 134, controller 110 is again
To calculate first by touch location according to the width information of the first touch control electrode 132 and second touch control electrode 134.Such one
Come, can be obtained high-precision touch sliding block using two touch control electrodes, simultaneously because required touch control electrode quantity reduces, it is raw
Production. art difficulty simultaneously declines, and saves production cost.
Fig. 3 is to be painted a kind of schematic diagram of variable capacitor unit Cmn as shown in Figure 1 according to the embodiment of the present invention.Such as
Shown in Fig. 1 and Fig. 3, variable capacitor unit Cmn include several switchable type capacitors (such as：Switchable type capacitor C1, C2,
C3, C4), and switchable type capacitor C1, C2, C3, C4 couplings parallel with one another, wherein switchable type capacitor C1, C2, C3, C4
One end selectively to receive drive signal P, and the other end of switchable type capacitor C1, C2, C3, C4 coupling the jointly
One comparator input terminal 122.
In some embodiments, it when controller 110 exports control signal CS to variable capacitor unit Cmn, can be switched
Switch K1, K2, K3, K4 corresponding to formula capacitor C1, C2, C3, C4 can respectively be switched to conducting or pass according to control signal CS
Closed state so that switchable type capacitor C1, C2, C3, C4 are respectively turned on and off, and thereby allow variable capacitor unit Cmn's
Equivalent capacity is able to be adjusted correspondingly according to control signal CS.The relevant descriptions of above-mentioned and variable capacitor unit Cmn are also
Suitable for variable capacitor unit Cmp.In addition, other circuit element implementation variable capacitances can be used in those skilled in the art
Device unit Cmn and Cmp, however it is not limited to the content of present invention examples cited.
In still further embodiments, sensing element 100 further includes third switch 160, one end of third switch 160 and second
Comparator input terminal 124 couples, and the other end of third switch 160 is selectively coupled with the first touch control electrode 132.Controller
110 calculate first by after touch location, and control first switch 140 makes first comparator input terminal 122 and second touch control electrode
134 couplings, control second switch 150 disconnect the second comparator input terminal 124 and second touch control electrode 134, control third switch
160 make the second comparator input terminal 124 and the first touch control electrode 132 couple, then calculate the first touch control electrode 132 and second and touch
Control electrode 134 second corrects first by touch location by touch location, and using second by touch location.
In above-mentioned operation, controller 110 transmits switch control signal SCS to first switch 140, second switch 150
And third switch 160, and first comparator input terminal 122 and the second comparator input terminal 124 are changed to touch with second respectively
Electrode 134 and 132 electric property coupling of the first touch control electrode are controlled, also that is, controller 110 is by 120 input terminal of comparator and touch control electrode
The electric property coupling of (including the first touch control electrode 132 and second touch control electrode 134) exchanges, and is touched with above-mentioned calculating first
The method of position calculates second by touch location, recycles second to correct first by touch location by touch location.Citing and
Speech, controller 110 calculate first by touch location and second by the mean place of touch location, and those skilled in the art can
Using other modes combine first by touch location and second by touch location, however it is not limited to above-mentioned examples cited.Controller 110
By measuring and calculating twice, the precision of touch sliding block is promoted once again.As described above, sensing element 100 passes through control the
One switch 140 and second switch 150 change the input of the first touch control electrode 132 and second touch control electrode 134 and comparator 120
The coupling mode at end promotes the touch location resolution of touch sliding block, and in this present embodiment, sensing element 100 passes through increase
Third switch 160 changes the coupling mode of the first touch control electrode 132 and second touch control electrode 134 and the input terminal of comparator 120,
Exponent number can will be further controlled to be promoted to using only first switch 140 and twice when second switch 150.
It, can limited electricity by previous embodiment it is found that using above-mentioned sensing element 100 in touch control induction device
It designs (such as on road：Only need the pin of two touch control electrodes) and limited capacitor reach the induction of comparatively sensitive touch sliding block
Operation, to save the setting of interlock circuit and capacitor, and then the circuit layout (layout) shared by reduction circuit and capacitor
Area so that the corresponding size of touch control induction device is effectively reduced.In addition, since the quantity of required touch control electrode subtracts
Few, therefore technology difficulty also declines so that cost of manufacture is effectively reduced.
Fig. 4 is to be painted a kind of flow chart of inducing method according to the embodiment of the present invention.Inducing method 400 includes several steps
Suddenly, to use a small amount of touch control electrode, precisely detect that user operates the touch location of touch sliding block (slider).In order to
Convenient and clear explanation, below for inducing method 400 explanation by taking sensing element 100 shown in FIG. 1 as an example, but in the present invention
Appearance is not limited thereto.Although it will be understood that in flow chart for inducing method 400 be to be described the step of particular order,
So this tandem for being not intended to limit step mentioned by the content of present invention, can increase or decrease the step in implementation.
Sensing element 100 controls first switch 140 by controller 110 makes the first comparator input terminal of comparator 120
122 and first electric property coupling in touch control electrode 132 and second touch control electrode 134, and pass through the control of controller 110 second
Switch 150 makes the second comparator input terminal 124 of comparator 120 selectively (be walked with 134 electric property coupling of second touch control electrode
Rapid S410).Controller 110, which controls second switch 150, makes the second comparator input terminal 124 not connect with touch control electrode, therefore uses
When person touches the first touch control electrode 132 and second touch control electrode 134, do not change the electrical characteristic of the second comparator input terminal 124,
The electrical coupling that sensing element 100 passes through first comparator input terminal 122 and the first touch control electrode 132 or second touch control electrode 134
It connects, and compares the current potential of first comparator input terminal 122 and the second comparator input terminal 124 by comparing device 120, to detect the
Whether the equivalent capacity of one touch control electrode 132 and second touch control electrode 134 changes.Implementation detail is as described above, not in this
It repeats again.
In an embodiment, sensing element 100 controls first switch 140 by controller 110, and first comparator is made to input
End 122 alternately with 134 electric property coupling of the first touch control electrode 132 and second touch control electrode, and controls second switch 150 and disconnects the
Two comparator input terminals 124 and second touch control electrode 134, to judge the quilt of the first touch control electrode 132 and second touch control electrode 134
State implementation detail is touched as described above, being repeated no more in this.
Sensing element 100 is controlled when the first touch control electrode 132 is touched with second touch control electrode 134 by controller 110
First switch 140 processed makes first comparator input terminal 122 and the first touch control electrode 132 couple, and controls second switch 150 and make the
Two comparator input terminals 124 are coupled with second touch control electrode 134, and calculate the first touch control electrode 132 and second touch control electrode
The first of 134 is by touch location (step S420).Sensing element 100 divides the first touch control electrode 132 with second touch control electrode 134
Not with 124 electric property coupling of first comparator input terminal 122 and the second comparator input terminal, then to the first touch control electrode 132 and
Two touch control electrodes 134 carry out potential compensation, thus, can offset the first touch control electrode 132 with 134 institute of second touch control electrode
Noise is received, and the first of high accurancy and precision is calculated using the complementary setting of the first touch control electrode 132 and second touch control electrode 134
By touch location.
In an embodiment, sensing element 100 is by controller according to the first touch control electrode 132 and second touch control electrode
134 width information calculates first by touch location, and the width of the first touch control electrode 132 and second touch control electrode 134 is non-
Even distribution.By the first touch control electrode 132 and second touch control electrode 134 of width non-uniform Distribution, made when user touches
It is improved at the equivalent capacity difference value of the first touch control electrode 132 and second touch control electrode 134, and reaches the spirit for promoting touch-control sensing
The purpose of sensitivity and resolution.
In an embodiment, sensing element 100 is when carrying out calculating first the step by touch location, by comparing device
The variable capacitor unit Cmn of 120 first comparator input terminal 122 and the second comparator input terminal 124 difference electric property coupling
With Cmp, adjustment signal CS is received from controller 110, according to adjustment signal CS adjustment variable capacitor unit Cmn and Cmp etc.
Imitate capacitance, and variable capacitor unit Cmn and Cmp and 110 electric property coupling of controller, and with first comparator input terminal 122 and
At least one electric property coupling in second comparator input terminal 124.Controller 110 is then the output signal CP according to comparator 120
Transmission adjusts signal CS to variable capacitor unit Cmn and Cmp.For example, the transmission of controller 110 adjustment signal CS adjustment can
The equivalent capacity of variodenser unit Cmn and Cmp, make the electricity of first comparator input terminal 122 and the second comparator input terminal 124
Position is identical, and goes out the first touch control electrode 132 and the according to the difference estimation of the equivalent capacity of variable capacitor unit Cmn and Cmp
The difference of the equivalent capacity of two touch control electrodes 134 simultaneously calculates first by touch location according to this again.The adjustment of controller 110 can power transformation
The equivalent capacity of container unit Cmn and Cmp and first is calculated by the details of touch location as described above, being repeated no more in this
It.
In another embodiment, in the step of adjusting the equivalent capacity of variable capacitor unit Cmn and Cmp, induction member
Part 100 selectively receives adjustment signal CS by one end of multiple switchable type capacitors of coupling parallel with one another, to change
The equivalent capacity of variable capacitor unit Cmn and Cmp, it is defeated that the other end of switchable type capacitor is commonly coupled to first comparator
Enter end 122 and second at least one in comparator input terminal 124, implementation detail in this as described above, repeat no more.
In an embodiment, sensing element 100 is received from controller 110 by variable capacitor unit Cmp and Cmn and is driven
Signal P, and according to drive signal P to first comparator input terminal 122 and the second comparator input terminal 124 charging (step
S430), as described above, being set to from capacitance for variable capacitor unit Cmp and Cmn is identical, and by drive signal P by first
Comparator input terminal 122 and the second comparator input terminal 124 charge to same potential, are touched in the first touch control electrode 132 and second
When control electrode 134 is touched, the current potential VS of first comparator input terminal 122 declines, and sensing element 100 can be according to first comparator
The first touch control electrode of the potential difference of input terminal 122 and the second comparator input terminal 124 detection 132 and second touch control electrode 134
By the state of touching.
In another embodiment, sensing element 100 more controls first switch 140 by controller 110 makes first comparator
Input terminal 122 is coupled with second touch control electrode 134, and control second switch 150 disconnects the second comparator input terminal 124 and second and touches
Electrode 134 is controlled, control third switch 160 makes the second comparator input terminal 124 and the first touch control electrode 132 couple, and passes through control
Device 110 processed calculates the second of the first touch control electrode 132 and second touch control electrode 134 by touch location again, and utilizes the second quilt
Touch location corrects first by touch location (step S440).Specifically, controller 110 is by first comparator input terminal 122
With the second comparator input terminal 124 be changed to respectively with 132 electric property coupling of second touch control electrode 134 and the first touch control electrode, and with
It calculates first and calculates second by touch location by the method for touch location, touched by touch location amendment first further according to second
Position is touched, implementation detail in this as described above, repeat no more.
By previous embodiment it is found that sensing element 100 described in the content of present invention is applied to touch-control with inducing method 400
In formula sliding block, you can reached with the area and limited capacitor that reduce the sensing element circuit design of touch sliding block quite clever
The inductive operation of quick touch sliding block, and then circuit layout (layout) area shared by reduction circuit and capacitor so that
The size of touch control induction device is effectively reduced.In addition, the quantity due to required touch control electrode is reduced, controls and touch in technique
The difficulty about the same from capacitance of control electrode also simultaneously declines so that cost of manufacture is effectively reduced.
Although the present invention is disclosed above with embodiment, however, it is not to limit the invention, and any this field tool is logical
Normal skill, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore the protection of the present invention
Range is when subject to claim institute defender.
Claims (8)
1. a kind of sensing element, which is characterized in that the sensing element includes：
One comparator, including a first comparator input terminal and one second comparator input terminal；
One first switch, one end of the first switch and the first comparator input terminal couple, the first switch it is another
One end and a coupling in one first touch control electrode and a second touch control electrode complimentary to one another；
One second switch, one end of the second switch and second comparator input terminal couple, the second switch it is another
One end is selectively coupled with the second touch control electrode；And
One controller, to control the first switch and the second switch；
Wherein when first touch control electrode is touched with the second touch control electrode, the controller control described first is opened
Pass makes the first comparator input terminal be coupled with first touch control electrode, and controlling the second switch makes described second to compare
It is coupled compared with device input terminal and the second touch control electrode, and calculates first touch control electrode and the second touch control electrode
One first by touch location；
The sensing element further includes：
At least one in an at least variable capacitor unit, with the first comparator input terminal and second comparator input terminal
A electric property coupling, and with the controller electric property coupling, an at least variable capacitor unit from the controller connecing
Receive at least one adjustment signal, the equivalent electricity for adjusting an at least variable capacitor unit described in signal adjustment according to described at least one
Hold；
The wherein described controller calculates first quilt to the equivalent capacity of an at least variable capacitor unit according to
Touch location.
2. sensing element as described in claim 1, which is characterized in that an at least variable capacitor unit includes：
Multiple switchable type capacitors, the switchable type capacitor coupling parallel with one another, wherein the switchable type capacitor
One end selectively to receive the adjustment signal, the other end of the switchable type capacitor is commonly coupled to described
It is at least one in one comparator input terminal and second comparator input terminal.
3. sensing element as described in claim 1, which is characterized in that an at least variable capacitor unit is also from the control
Device processed receives an at least drive signal, to pass through an at least drive signal to the first comparator input terminal and described
At least one charging in second comparator input terminal.
4. sensing element as described in claim 1, which is characterized in that first touch control electrode and the second touch control electrode
Width non-uniform Distribution, the controller according to the width of first touch control electrode and the second touch control electrode believing
Breath calculates described first by touch location.
5. sensing element as described in claim 1, which is characterized in that the controller, which controls the first switch, makes described the
One comparator input terminal alternately with first touch control electrode and the second touch control electrode electric property coupling, and controls described the
Two switches disconnect second comparator input terminals and the second touch control electrode, with judge first touch control electrode with it is described
Second touch control electrode by the state of touching.
6. sensing element as described in claim 1, which is characterized in that the sensing element further includes：
One third switchs, and one end of the third switch is coupled with second comparator input terminal, and the third switchs another
One end is selectively coupled with first touch control electrode；
The wherein described controller makes the first comparator input terminal and second touch-control electricity to control the first switch
Pole couples, and controls the second switch and disconnects second comparator input terminal and the second touch control electrode, control described the
Three switches make second comparator input terminal and first touch control electrode couple, then calculate first touch control electrode with
The one second of the second touch control electrode is corrected described first by touch location using described second and is touched by touch location
Position.
7. a kind of inducing method, which is characterized in that the inducing method includes：
A first switch is controlled by a controller, so that a first comparator input terminal of a comparator is coupled to complimentary to one another
One in one first touch control electrode and a second touch control electrode, and a second switch is controlled, make the one second of the comparator
Comparator input terminal is selectively coupled with the second touch control electrode；And
When first touch control electrode is touched with the second touch control electrode, opened by controller control described first
Pass makes the first comparator input terminal be coupled with first touch control electrode, and controlling the second switch makes described second to compare
It is coupled compared with device input terminal and the second touch control electrode, and calculates first touch control electrode and the second touch control electrode
One first by touch location；
Calculate described first includes by the step of touch location：
At least one adjustment signal is received from the controller by an at least variable capacitor unit, is adjusted according to described at least one
The equivalent capacity of a signal adjustment at least variable capacitor unit, wherein described in an at least variable capacitor unit with it is described
In first comparator input terminal and second comparator input terminal it is at least one and with the controller electric property coupling；And
Described first is calculated by the controller according to the equivalent capacity of an at least variable capacitor unit to be touched
Position.
8. inducing method as claimed in claim 7, which is characterized in that adjusted described in signal adjustment at least according to described at least one
The step of equivalent capacity of one variable capacitor unit includes：
At least one adjustment signal is selectively received by one end of multiple switchable type capacitors of coupling parallel with one another,
The other end of the wherein described switchable type capacitor couples the first comparator input terminal jointly and second comparator is defeated
Enter at least one in end.
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| US201562116934P | 2015-02-17 | 2015-02-17 | |
| US62/116,934 | 2015-02-17 |
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| CN108897459B (en) * | 2018-08-31 | 2024-01-23 | 深圳和而泰智能控制股份有限公司 | Touch detection method of touch screen, touch capacitance, touch screen and electronic device |
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| CN102117147A (en) * | 2009-12-30 | 2011-07-06 | 株式会社和冠 | Multi-touch sensor apparatus and method |
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| TWI553537B (en) | 2016-10-11 |
| CN105897239A (en) | 2016-08-24 |
| TW201631459A (en) | 2016-09-01 |
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