CN105897239A - Sensing device and sensing method thereof - Google Patents
Sensing device and sensing method thereof Download PDFInfo
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- CN105897239A CN105897239A CN201510731558.1A CN201510731558A CN105897239A CN 105897239 A CN105897239 A CN 105897239A CN 201510731558 A CN201510731558 A CN 201510731558A CN 105897239 A CN105897239 A CN 105897239A
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- control electrode
- touch control
- input terminal
- switch
- touch
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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
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Abstract
The invention provides a sensing device and a sensing method thereof. The sensing device includes a comparator, a first switch, a second switch, and a controller. The comparator includes a first comparator input end and a second comparator input end. An end of the first switch is coupled to the first comparator input end, and the other end is coupled to one of a first touch electrode and a second touch electrode that are complementary. An end of the second switch is coupled to the second comparator input end, and the other end is selectively coupled to the second touch electrode. The controller controls the first switch and the second switch. When the first touch electrode and the second touch electrode are touched, the controller controls the first switch to couple the first comparator input end and the first touch electrode, controls the second switch to couple the second comparator input end and the second touch electrode, and calculates a first touched position of the first touch electrode and the second touch electrode. The embodiment of the invention can be used not only for reducing the manufacturing cost, but also for reducing the area of the touch sensing device.
Description
Technical field
Heretofore described embodiment content relates to a kind of sensing element, and is applicable to sense in particular to one
Answer the sensing element of touch-control slide block (slider).
Background technology
The mechanical key interface that touch sensing controls interface more traditional uses more intuition, it is possible to promote user's experience
(user experience), owing to putting into a large amount of development resources, the manufacturing cost of touch panel the most also keeps falling,
More and more electronic products change adopt touch face version as operation interface, the demand of touch sensing device is grown up the most day by day.
In operation Application of Interface, slide block (slider) is usually used in needing the application scenarios of Continuous Adjustment numerical value, if with touch-control
Mode realizes slide block function, need to be accurately positioned out user and touch the position of touch sensing element.Traditional touch is sliding
Block generally uses multiple touch controlled key implementation, takes turns each touch controlled key of scan flow, and calculates user with interpolation method
Touch position.But, if being intended to reach higher precision, need to be significantly increased the quantity of touch controlled key, such one
Come, the raising of manufacturing cost can be caused.It addition, this type of touch slide block need to control in manufacture process each touch-control by
Key about the same from capacitance, otherwise will be substantially reduced control precision, and increase touch controlled key quantity and the most more promote control
Make each touch controlled key difficulty from capacitance (self capacitance), increase process costs further.
Summary of the invention
For producing the sensing element possessing high accurancy and precision touch slide block with cheap manufacturing cost, present invention carries
For a kind of sensing element, sensing element comprises comparator, the first switch, second switch and controller.Comparator bag
Containing the first comparator input terminal and the second comparator input terminal.One end of first switch and the first comparator input terminal coupling
Connecing, the other end couples with in the first touch control electrode complimentary to one another and the second touch control electrode；The one of second switch
End couples with the second comparator input terminal, and the other end optionally couples with the second touch control electrode.Controller controls first
Switch and second switch.When the first touch control electrode is touched with the second touch control electrode, controller controls the first switch to be made
First comparator input terminal and the first touch control electrode couple, and control second switch and make the second comparator input terminal and second touch
Control electrode couples, then calculates the first of the first touch control electrode and the second touch control electrode by touch location.
In an embodiment, sensing element further includes at least one 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, in order to receive from controller
At least one adjusts signal, adjusts the equivalent capacity of variable capacitor unit according to adjustment signal, and controller can in order to basis
The equivalent capacity of variodenser unit calculates first by touch location.
In an embodiment, variable capacitor unit comprises multiple switchable type capacitor, phase between switchable type capacitor
Mutually coupled in parallel, one end of switchable type capacitor in order to optionally to receive adjustment signal, switchable type capacitor
The other end is commonly coupled in the first comparator input terminal and the second comparator input terminal at least one.
In an embodiment, variable capacitor unit also receives from controller and drives signal, in order to by driving signal pair
At least one charging in first comparator input terminal and the second comparator input terminal.
In an embodiment, the first touch control electrode and the width non-uniform Distribution of the second touch control electrode, controller is in order to root
First is calculated by touch location according to the width information of the first touch control electrode with the second touch control electrode.
In an embodiment, controller control first switch make the first comparator input terminal alternately with the first touch control electrode
With the second touch control electrode electric property coupling, and control second switch disconnect the second comparator input terminal and the second touch control electrode,
With judge the first touch control electrode and the second touch control electrode by the state of touching.
In an embodiment, sensing element further includes the 3rd switch, one end of the 3rd switch and the second comparator input terminal
Coupling, the other end of the 3rd switch optionally couples with the first touch control electrode, and controller makes in order to control the first switch
First comparator input terminal and the second touch control electrode couple, and control second switch and disconnect the second comparator input terminal and second
Touch control electrode, controls the 3rd switch and makes the second comparator input terminal and the first touch control electrode couple, then it is tactile to calculate first
Control electrode and the second touch control electrode second by touch location, and utilize second to be touched position by touch location correction first
Put.
Another aspect of present invention is a kind of inducing method, comprises the steps of and is opened by controller control first
Close, make the first comparator input terminal of comparator be coupled in the first touch control electrode complimentary to one another and the second touch control electrode
One, and control second switch, make the second comparator input terminal of comparator optionally with the second touch control electrode coupling
Connect；When the first touch control electrode is touched with the second touch control electrode, control the first switch by controller and make first to compare
Device input and the first touch control electrode couple, and control second switch and make the second comparator input terminal and the second touch control electrode
Couple, and calculate the first of the first touch control electrode and the second touch control electrode by touch location.
In an embodiment, calculate first and comprised by the step of touch location: by variable capacitor unit from controlling
Device receives and adjusts signal, adjusts the equivalent capacity of variable capacitor unit, wherein variable condenser list according to adjustment signal
Unit with controller electric property coupling, and with at least one electrical coupling in the first comparator input terminal and the second comparator input terminal
Connect；First is calculated by touch location according to the equivalent capacity of variable capacitor unit by controller.
In an embodiment, the step according to adjusting the equivalent capacity that signal adjusts variable capacitor unit comprises: pass through
One end of the multiple switchable type capacitors coupled parallel with one another optionally receives adjustment signal, and switchable type electric capacity
The other end of device couples at least one in the first comparator input terminal and the second comparator input terminal jointly.
When the sensing element that use present invention is provided is with inducing method, it is only necessary to a small amount of touch control electrode number reaches
To high-precision touch control operation, not only reduce manufacturing cost, more can reduce the area of touch sensing element, make electronics first
Part volume is less and more lightweight, and promotes user's experience of user.
Present invention aims to provide the simplification summary of present invention, so that present invention is possessed substantially by reader
Understanding.The complete overview of this summary of the invention not present invention, and it is not intended to pointing out the embodiment of the present invention
Important (or crucial) element or define the scope of the present invention.
Accompanying drawing explanation
Fig. 1 is the schematic diagram illustrating a kind of sensing element according to first embodiment of the invention；
Fig. 2 A to Fig. 2 C is to illustrate electric capacity and current potential in one sensing element as shown in Figure 1 according to the embodiment of the present invention
The schematic diagram of change；
Fig. 3 is the schematic diagram illustrating a kind of variable capacitor unit as shown in Figure 1 according to the embodiment of the present invention；And
Fig. 4 is the flow chart illustrating a kind 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 electrode
134 second touch control electrode
140 first switches
150 second switches
160 the 3rd switches
400 inducing methods
S410～S440 step
Detailed description of the invention
It is hereafter to coordinate institute accompanying drawings to elaborate for embodiment, but the embodiment provided be not used to limit this
Bright contained scope, and the description of structure operation is not used to limit its order performed, any is reconfigured by element
Structure, produced the device with impartial effect, be all the scope that the present invention is contained.Additionally, it is graphic only to say
For the purpose of bright, and map not according to life size.For making to readily appreciate, in the description below, similar elements is by with identical symbol
Number sign illustrates.
In the word (terms) that full piece specification and claim are used, in addition to having and indicating especially, generally
Have each word use in this area, in the content that discloses at this with the usual meaning in special content.Some is used
With describe the present invention word by lower or the other places of this specification discuss, to provide those skilled in the art relevant
Guiding extra in description of the invention.
It is commonly index about " about " used herein, " about ", " substantially " or " substantially "
The error of value or scope, it has different change according to different technologies, and its scope is for those skilled in the art
Understood that there is broadest interpretation, thereby contained all deformation and similar structures.In certain embodiments, above-mentioned
The error of numerical value or scope refer to, within 20 percent, be preferably within 10, be the most then
Within 5 percent.Wen Zhongruo is without clearly stating, and its mentioned numerical value all regards as approximation, such as can be such as
" about ", " about ", error represented by " substantially " or " substantially " or scope, or other approximations.
About " first " used herein, " second " etc., censure order or the meaning of cis-position the most especially,
Also being not used to limit the present invention, it is only used to element or the operation that difference describes with constructed term.
Secondly, the word used in this article " comprises ", " including ", " having ", " containing " etc.,
Be opening term, i.e. mean including but not limited to.
It addition, about " coupling " used herein or " connection ", all can refer to that two or more elements are the most straight
Connect and make entity or in electrical contact, or mutually indirectly put into effect body or in electrical contact, be also referred to as two or more elements mutual
Operation or action.
Fig. 1 is the schematic diagram illustrating a kind of sensing element according to first embodiment of the invention.As it is shown in figure 1, sensing unit
Part 100 may be used to sense the position that touch control electrode is touched, and can perform corresponding function or operation according to sensing result
(such as: control subsequent conditioning circuit, output digital data signal etc.).Specifically, user touches touch slide block (slider),
And touch slide block comprises plural touch control electrode, sensing element 100 and the touch control electrode electricity under touch slide block
Property couples, and when user touches touch slide block, can touch at least two touch control electrode, sensing element 100
By the electrical characteristic information of touch control electrode, obtain user and touch the position of touch control electrode, and perform according to position
Corresponding function or operation.In the embodiment shown in Fig. 1, sensing element 100 and the first touch control electrode 132 and
Two touch control electrode 134 electric property couplings.Specifically, those skilled in the art can adjust sensing unit according to application demand
The touch control electrode number that part 100 is connected, present invention is not limited.
Sensing element 100 comprises controller 110, comparator the 120, first switch 140 and second switch 150.
Comparator 120 comprises the first comparator input terminal 122 and the second comparator input terminal 124.First switch 140
One end couples with the first comparator input terminal 122, the other end of the first switch 140 and the first touch-control electricity complimentary to one another
One in pole 132 and the second touch control electrode 134 couples.One end of second switch 150 and the second comparator input terminal
124 couple, and second switch 150 other end optionally couples with the second touch control electrode 134.Controller 110 controls
First switch 140 and second switch 150.When the first touch control electrode 132 is touched with the second touch control electrode 134,
Controller 110 controls the first switch 140 makes the first comparator input terminal 122 couple with the first touch control electrode 132, control
Second switch 150 processed makes the second comparator input terminal 124 couple with the second touch control electrode 134, then it is tactile to calculate first
Control electrode 132 and the second touch control electrode 134 first by touch location.
Controller 110 transmits switch controlling signal SCS to first switch 140 with second switch 150 to control switch
State, in an embodiment, controller 110 is a microcontroller (microcontroller), and the first switch 140 is one
Three-way switch (three-way switch), second switch 150 is a two-way switch (two-way switch).Real in another
Executing in example, controller 110 is a central processing unit (central processor), the first switch 140 use Liang Ge bis-tunnel
Switch implementation forms, and second switch 150 is two-way switch.Those skilled in the art can use other components
Realizing said elements, present invention is not limited to examples cited.
First touch control electrode 132 and the second touch control electrode 134 are complimentary to one another, in the present embodiment, and the first touch control electrode
132 and second touch control electrode 134 be all triangular-shaped electrodes, display position is symmetrical and about the same from capacitance.Ability
Territory has usual skill can use the touch control electrode of other shapes, the shape such as such as rectangle, chevron (Chevron), no
Limited by present invention examples cited.
When user touches touch slide block (slider), the first touch control electrode 132 and the second touch control electrode 134 are simultaneously
Touched, the first touch control electrode 132 first touch control electrode 132 and second corresponding with the electric capacity of the second touch control electrode 134
Touch control electrode 134 is produced change by touch location, and the first comparator input terminal 122 or the second of comparator 120 compares
Device input 124 and the first touch control electrode 132 or the second touch control electrode 134 electric property coupling, therefore comparator 120
The current potential of input also produces corresponding change, and controller 110, in order to receive output signal CP of comparator 120, is examined
The current potential surveying comparator 120 input changes, to measure capacitance variations and to judge by touch location.
Controller 110, in time measuring capacitance variations, controls the first switch 140 by the first comparator input terminal 122 and the
One touch control electrode 132 couples, and controls second switch 150 by the second comparator input terminal 124 and the second touch control electrode
134 couple, and now the first comparator input terminal 122 and second comparator input terminal 124 of comparator 120 distinguishes coupling
It is connected to the first touch control electrode 132 and the second touch control electrode 134 of complementation, the first touch control electrode 132 and the second touch-control electricity
Pole 134 is complimentary to one another, and suffered noise is the most identical, when therefore controller 110 measures capacitance variations, and the first touch-control electricity
Noise suffered by pole 132 and the second touch control electrode 134 will cancel each other, and promote accuracy in measurement, can reach and use than tradition
The precision of the touch slide block several times that multiple touch controlled keys realize.For example, with the touch slide block of same length
For, tradition uses the touch slide block of multiple touch controlled keys only to can reach the control on about 30 rank, but, use this
Summary of the invention technological thought can rise to 70～80 rank by controlling exponent number.Thus, it is only necessary to minority touch control electrode
Reach to control accurately by touch slide block, not only reduce the area of sensing element 100, more with cheap cost
More preferably user's experience is provided.
In an embodiment, sensing element 100 further includes variable capacitor unit Cmn and variable capacitor unit
Cmp, both of which and controller 110 electric property coupling, adjust signal CS, variable capacitance to receive from controller 110
Device unit Cmn and variable capacitor unit Cmp adjust equivalent capacity according to adjusting signal CS, in the present embodiment,
Variable capacitor unit Cmn and the first comparator input terminal 122 electric property coupling, variable capacitor unit Cmp and
Two comparator input terminal 124 electric property couplings, controller 110 adjusts variable capacitor unit Cmn and variable condenser
The equivalent capacity of unit Cmp, and according to variable capacitor unit Cmn and the equivalence of variable capacitor unit Cmp
Electric capacity obtain the first touch control electrode 132 and the second touch control electrode 134 because user touches produced capacitance variations, then
Calculate the first of the first touch control electrode 132 and the second touch control electrode 134 by touch location.Further described below
Calculate the first touch control electrode 132 and the capacitance variations of the second touch control electrode 134 and calculate the first thin by touch location
Joint.
In an embodiment, variable capacitor unit Cmn and variable capacitor unit Cmp receive from controller 110
Drive signal P, in order to by driving signal P to the first comparator input terminal 122 and the second comparator input terminal 124
Charging.Variable capacitor unit Cmn and variable capacitor unit Cmp receive identical driving letter from controller 110
Number P, therefore can offset variable capacitor unit Cmn and noise that variable capacitor unit Cmp is received further.
Fig. 2 A to Fig. 2 C is to illustrate electric capacity and current potential in one sensing element as shown in Figure 1 according to the embodiment of the present invention
The schematic diagram of change.Specifically, as shown in Fig. 1 and Fig. 2 A to Fig. 2 C, with variable capacitor unit Cmn and
As a example by Cmp has default identical equivalent capacity, do not move with the second touch control electrode 134 in the first touch control electrode 132
When making (such as: the first touch control electrode 132 and the second touch control electrode 134 are without touching), current potential VS (i.e. the
The current potential of one comparator input terminal 122) can be by can with current potential VDK (current potential of the i.e. second comparator input terminal 124)
Variodenser unit Cmn and Cmp and driving signal P charges to same or like current potential (such as Fig. 2 A).
In an embodiment, controller 110 control the first switch 140 make the first comparator input terminal 122 alternately with
First touch control electrode 132 and the second touch control electrode 134 electric property coupling, and control second switch 150 and disconnect second and compare
Device input 124 and the second touch control electrode 134, to judge the first touch control electrode 132 and the second touch control electrode 134
By the state of touching, for example, controller 110 controls the alternate cycle of the first switch 140 switching state is several
us.Specifically, in the first touch control electrode 132 and the second touch control electrode 134 action (such as: the first touch control electrode
132 and second touch control electrode 134 touch through finger, pointer etc.) when, the first touch control electrode 132 and the
Two touch control electrode 134 can produce change with the capacitance of one end that the first comparator input terminal 122 couples so that current potential
VS falls below current potential VDK (such as Fig. 2 B), and controller 110 is then by the produced ratio of comparator 120
Relatively device output signal CP detects that the first comparator input terminal 122 current potential declines, and then judges the first touch control electrode
132 are touched with the second touch control electrode 134.
When controller 110 judges that the first touch control electrode 132 is touched with the second touch control electrode 134, control first and open
Closing 140 makes the first comparator input terminal 122 couple with the first touch control electrode 132, controls second switch 150 and makes second
Comparator input terminal 124 couples with the second touch control electrode 134, variable capacitor unit Cmn according to current potential VS with
The relatively rear produced comparator output signal CP of current potential VDK adjusts (such as: variable capacitor unit Cmn exists
The equivalent capacity bigger relative to variable capacitor unit Cmp can be had after adjusting), and then to the first comparator
Input 122 carries out potential compensation so that current potential VTK rises (or decline) again to or phase identical with current potential VDK
Closely (such as Fig. 2 C), the current potential of the most above-mentioned correspondence or capacitance variations are just available for the follow-up calculation process carrying out data,
To judge the position that touch control operation occurs, or thereby perform corresponding touch controllable function.
In other embodiments, it is also possible to be that variable capacitor unit Cmp compares with current potential VDK according to current potential VS
Rear produced comparator output signal CP adjusts (such as: variable capacitor unit Cmp can have after adjusting
Have the equivalent capacity less relative to variable capacitor unit Cmn), and then the second comparator input terminal 124 is entered
Row potential compensation so that current potential VDK declines (or rising) to same or like with current potential VS.Again or other
In embodiment, variable capacitor unit Cmp and variable capacitor unit Cmn can respectively according to current potential VTK with
The relatively rear produced comparator output signal CP of current potential VS adjusts, and then to the second comparator input terminal 124
And first comparator input terminal 122 carry out potential compensation so that current potential VDK and current potential VS compensated after electricity
Position is same or like.
Controller 110 produces control signal CS and controls variable condenser list in order to receive comparator output signal CP
Unit Cmn, to adjust the equivalent capacity of variable capacitor unit Cmn so that variable capacitor unit Cmn can be corresponding
Ground carries out potential compensation to the first comparator input terminal 122.In other embodiments, control signal CS is in order to adjust
The equivalent capacity of variable capacitor unit Cmp so that variable capacitor unit Cmp can be correspondingly to the second comparator
Input 124 carries out potential compensation.In still further embodiments, it is variable to be that control signal CS also can go to adjust respectively
Capacitor unit Cmp and the equivalent capacity of variable capacitor unit Cmn so that variable capacitor unit Cmp
And variable capacitor unit Cmn can be correspondingly to the second comparator input terminal 124 and the first comparator input terminal
122 carry out potential compensation.
In an embodiment of the present invention, " potential compensation ", except referring to improve the current potential of comparator input terminal, also may be used
With in order to refer to downgrade the current potential of comparator input terminal, that is the current potential of comparator input terminal can increase through potential compensation or
Reduce.
After carrying out potential compensation, controller 110 is according to variable capacitor unit Cmp and variable capacitor unit Cmn
Equivalent capacity difference, calculate the first touch control electrode 132 and capacitance difference of the second touch control electrode 134.Below
To be illustrated with the embodiment depicted in Fig. 1, in this embodiment, when user does not touches the first touch control electrode
132 and during the second touch control electrode 134, the first touch control electrode 132 and the second touch control electrode 134 from capacitance about phase
With, when user touches the first touch control electrode 132 and the second touch control electrode 134, the first touch control electrode 132 and the
The equivalent capacity of two touch control electrode 134 increases simultaneously, but the first touch control electrode 132 and the second touch control electrode 134 etc.
Effect capacitance increase also differs, due to the event of geometric configuration, when user's touch location is got over the most up, the first touch-control
The equivalent capacity increments of electrode 132 is the most, then the equivalent capacity increments of the second touch control electrode 134 is the fewest, controls
Device 110 calculates first according to the equivalent capacity difference of the first touch control electrode 132 with the second touch control electrode 134 and is touched
Position.
For example, (touch near second when the upper limb of closer second touch control electrode 134 of user's touch location
Control electrode 134 wider portion), owing to capacitance is directly proportional to area and is inversely proportional to distance, therefore the second touch control electrode
The equivalent capacity increments of 134 is relatively big, and the equivalent capacity increments of the first touch control electrode 132 is less, therefore second touches
The equivalent capacitance value of control electrode 134 will be above the first touch control electrode 132；When user's touch location closer second is touched
When controlling the lower edge of electrode 134 (near the second touch control electrode 134 narrower part), the equivalence of the second touch control electrode 134
Capacitance increase is less, and the equivalent capacity increments of the first touch control electrode 132 is relatively big, therefore the second touch control electrode 134
Equivalent capacitance value will be less than the first touch control electrode 132.Controller 110 is variable to first in transmitting control signal CS
Capacitor unit Cmn and the second variable capacitor unit Cmp, can power transformations then according to first to carry out potential compensation
The difference of the equivalent capacity of container unit Cmn and the second variable capacitor unit Cmp, deduces the first touch control electrode
132 and second difference of equivalent capacity of touch control electrode 134, and calculate the first touched position.
Should be noted, in the embodiment depicted in Fig. 1, the first touch control electrode 132 and the second touch control electrode 134
Width non-uniform Distribution, to amplify the first touch control electrode 132 and equivalent capacitance value difference of the second touch control electrode 134,
Controller 110 is again in order to calculate the first quilt according to the width information of the first touch control electrode 132 and the second touch control electrode 134
Touch location.Consequently, it is possible to use two touch control electrode i.e. to can get high-precision touch slide block, simultaneously because institute
Needing touch control electrode quantity to reduce, producting process difficulty declines simultaneously, saves production cost.
Fig. 3 is the schematic diagram illustrating a kind of variable capacitor unit Cmn as shown in Figure 1 according to the embodiment of the present invention.
As shown in figures 1 and 3, variable capacitor unit Cmn includes several switchable type capacitor (such as: switchable type
Capacitor C1, C2, C3, C4), and switchable type capacitor C1, C2, C3, C4 is parallel with one another couples, its
One end of middle switchable type capacitor C1, C2, C3, C4 is in order to optionally to receive driving signal P and changeable
The other end of formula capacitor C1, C2, C3, C4 couples the first comparator input terminal 122 jointly.
In certain embodiments, when controller 110 exports control signal CS to variable capacitor unit Cmn,
Switch K1, K2, K3, K4 corresponding to switchable type capacitor C1, C2, C3, C4 can be according to control signals
CS each switches to turned on or off so that switchable type capacitor C1, C2, C3, C4 each open or
Close, thereby allow the equivalent capacity of variable capacitor unit Cmn be able to according to control signal CS and adjust accordingly
Whole.The above-mentioned description relevant to variable capacitor unit Cmn is also applicable to variable capacitor unit Cmp.It addition,
Those skilled in the art can use other component implementation variable capacitor unit Cmn and Cmp, does not limit
In present invention examples cited.
In still further embodiments, sensing element 100 further include the 3rd switch 160, the 3rd switch 160 one end with
Second comparator input terminal 124 couples, the 3rd switch 160 the other end optionally with the first touch control electrode 132
Couple.Controller 110 calculates first by after touch location, controls the first switch 140 and makes the first comparator input terminal
122 couple with the second touch control electrode 134, control second switch 150 and disconnect the second comparator input terminal 124 and second
Touch control electrode 134, controls the 3rd switch 160 and makes the second comparator input terminal 124 couple with the first touch control electrode 132,
Calculate the second of the first touch control electrode 132 and the second touch control electrode 134 by touch location again, and utilize second to be touched
Touch position correction first by touch location.
In above-mentioned operation, controller 110 transmits switch controlling signal SCS to first switch 140, second switch
150 and the 3rd switch 160, and are changed respectively with the second comparator input terminal 124 by the first comparator input terminal 122
For with the second touch control electrode 134 and the first touch control electrode 132 electric property coupling, that is, controller 110 is by comparator
The electric property coupling of 120 inputs and touch control electrode (comprising the first touch control electrode 132 and the second touch control electrode 134) is handed over
Changing, and calculated second by touch location with above-mentioned calculating first by the method for touch location, recycling second is touched
Position correction first is by touch location.For example, controller 110 calculates first and is touched by touch location and second
The mean place of position, those skilled in the art can make to combine first in other ways by touch location and the second quilt
Touch location, however it is not limited to above-mentioned examples cited.Controller 110, by twice measurement and calculating, promotes touch-control once again
The precision of formula slide block.As it has been described above, sensing element 100 is by controlling the first switch 140 and second switch 150,
Change the first touch control electrode 132 and the second touch control electrode 134 and the coupling mode of the input of comparator 120, promote
The touch location resolution of touch slide block, in the present embodiment, sensing element 100 is by increasing by the 3rd switch 160
Change the first touch control electrode 132 and the second touch control electrode 134 and the coupling mode of the input of comparator 120, can enter
One step is promoted to only use the first switch 140 and twice during second switch 150 by controlling exponent number.
From previous embodiment, apply above-mentioned sensing element 100 in touch control induction device, just can be limited
It is sliding that comparatively sensitive touch reached by circuit design (such as: only need the pin of two touch control electrode) and limited capacitor
The inductive operation of block, to save the setting of interlock circuit and capacitor, and then reduction circuit and the circuit shared by capacitor
Layout (layout) area so that the corresponding size of touch control induction device is reduced effectively.Further, since institute
The quantity needing touch control electrode reduces, and the most therefore technology difficulty declines so that cost of manufacture is effectively reduced.
Fig. 4 is the flow chart illustrating a kind of inducing method according to the embodiment of the present invention.Inducing method 400 comprises several step
Suddenly, to use a small amount of touch control electrode, precisely detect that user operates the touch location of touch slide block (slider).
Illustrate for convenience and clearly, illustrating as a example by the sensing element 100 shown in Fig. 1 below for inducing method 400,
But present invention is not limited thereto.Should be appreciated that, although flow chart is with specific suitable for inducing method 400
The step of sequence describes, and before and after so this is not limiting as step mentioned by present invention, order, can increase in implementation
Or reduce described step.
Sensing element 100 controls the first switch 140 by controller 110 makes the first comparator of comparator 120 input
An electric property coupling in end 122 and the first touch control electrode 132 and the second touch control electrode 134, and pass through controller
110 control second switches 150, make the second comparator input terminal 124 of comparator 120 optionally with the second touch-control
Electrode 134 electric property coupling (step S410).Controller 110 controls second switch 150 makes the second comparator input terminal
124 are not connected with touch control electrode, therefore when user touches the first touch control electrode 132 and the second touch control electrode 134, no
Changing the electrical characteristic of the second comparator input terminal 124, sensing element 100 is by the first comparator input terminal 122
With the first touch control electrode 132 or electric property coupling of the second touch control electrode 134, and compare the first ratio by comparator 120
Relatively device input 122 and the current potential of the second comparator input terminal 124, tactile to detect the first touch control electrode 132 and second
Whether the equivalent capacity of control electrode 134 changes.Implementation detail is as it has been described above, repeat no more in this.
In an embodiment, sensing element 100 controls the first switch 140 by controller 110, makes the first comparator
Input 122 alternately with the first touch control electrode 132 and the second touch control electrode 134 electric property coupling, and control second to open
Close 150 disconnection the second comparator input terminal 124 and the second touch control electrode 134, with judge the first touch control electrode 132 and
State of the being touched implementation detail of the second touch control electrode 134 is as it has been described above, repeat no more in this.
Sensing element 100, when the first touch control electrode 132 is touched with the second touch control electrode 134, passes through controller
110 control the first switch 140 makes the first comparator input terminal 122 couple with the first touch control electrode 132, and controls the
Two switches 150 make the second comparator input terminal 124 couple with the second touch control electrode 134, and calculate the first touch-control electricity
The first of pole 132 and the second touch control electrode 134 is by touch location (step S420).Sensing element 100 is by the first touch-control
Electrode 132 and the second touch control electrode 134 respectively with the first comparator input terminal 122 and the second comparator input terminal 124
Electric property coupling, then the first touch control electrode 132 and the second touch control electrode 134 are carried out potential compensation, consequently, it is possible to can
Offset the first touch control electrode 132 with the second received noise of touch control electrode 134, and utilize the first touch control electrode 132
Complementary with the second touch control electrode 134 arranges calculate high accurancy and precision first by touch location.
In an embodiment, sensing element 100 passes through controller according to the first touch control electrode 132 and the second touch control electrode
The width information calculating first of 134 is by touch location, and the first touch control electrode 132 and width of the second touch control electrode 134
Degree non-uniform Distribution.By the first touch control electrode 132 and the second touch control electrode 134 of width non-uniform Distribution, use
The equivalent capacity difference value being caused the first touch control electrode 132 and the second touch control electrode 134 when person touches improves, and reaches
Purpose to the sensitivity with resolution promoting touch-control sensing.
In an embodiment, sensing element 100 in carry out calculating first by the step of touch location time, pass through comparator
The variable condenser list of first comparator input terminal 122 of 120 and the second comparator input terminal 124 electric property coupling respectively
Unit Cmn and Cmp, receives from controller 110 and adjusts signal CS, adjusts variable condenser according to adjusting signal CS
The equivalent capacity of unit Cmn Yu Cmp, and variable capacitor unit Cmn and Cmp and the electrical coupling of controller 110
Connect, and with at least one electric property coupling in the first comparator input terminal 122 and the second comparator input terminal 124.Control
Device 110 is then that output signal CP according to comparator 120 transmits adjustment signal CS to variable capacitor unit Cmn
With Cmp.For example, controller 110 transmits and adjusts signal CS adjustment variable capacitor unit Cmn and Cmp
Equivalent capacity, make the first comparator input terminal 122 identical with the current potential of the second comparator input terminal 124, and according to
Variable capacitor unit Cmn goes out the first touch control electrode 132 and the second touch-control with the difference estimation of the equivalent capacity of Cmp
The difference of the equivalent capacity of electrode 134 also calculates first the most according to this by touch location.Controller 110 adjusts can power transformation
The equivalent capacity of container unit Cmn Yu Cmp and calculate first by the details of touch location as it has been described above, in this not
Repeat it again.
In another embodiment, in adjusting the step of equivalent capacity of variable capacitor unit Cmn and Cmp, sense
Element 100 is answered optionally to receive adjustment signal by one end of the multiple switchable type capacitors coupled parallel with one another
CS, to change the equivalent capacity of variable capacitor unit Cmn and Cmp, the other end of switchable type capacitor is altogether
With being coupled in the first comparator input terminal 122 and the second comparator input terminal 124 at least one, implementation detail is as above
Described, repeat no more in this.
In an embodiment, sensing element 100 is connect from controller 110 by variable capacitor unit Cmp and Cmn
Receive and drive signal P, and according to driving signal P to the first comparator input terminal 122 and the second comparator input terminal 124
Charging (step S430), as it has been described above, variable capacitor unit Cmp and Cmn's can be set to identical from capacitance, and
By driving signal P that the first comparator input terminal 122 and the second comparator input terminal 124 are charged to same potential,
When the first touch control electrode 132 is touched with the second touch control electrode 134, the current potential of the first comparator input terminal 122
VS declines, and sensing element 100 can be according to the first comparator input terminal 122 and electricity of the second comparator input terminal 124
Position Difference test the first touch control electrode 132 and the second touch control electrode 134 by the state of touching.
In another embodiment, sensing element 100 more controls the first switch 140 by controller 110 makes first to compare
Device input 122 couples with the second touch control electrode 134, controls second switch 150 and disconnects the second comparator input terminal
124 and second touch control electrode 134, control the 3rd switch 160 and makes the second comparator input terminal 124 electric with the first touch-control
Pole 132 couples, and is calculated the of the first touch control electrode 132 and the second touch control electrode 134 again by controller 110
Two by touch location, and utilize second by touch location correction first by touch location (step S440).Specifically,
First comparator input terminal 122 and the second comparator input terminal 124 are changed into and the second touch-control electricity by controller 110 respectively
Pole 134 and the first touch control electrode 132 electric property coupling, and calculated the second quilt to calculate first by the method for touch location
Touch location, further according to second by touch location correction first by touch location, implementation detail is not as it has been described above, in this
Repeat again.
From previous embodiment, the sensing element 100 described by present invention is applied to touch with inducing method 400
In control formula slide block, area and the limited capacitor that i.e. can reduce the sensing element circuit design of touch slide block are reached
The inductive operation of comparatively sensitive touch slide block, and then reduction circuit and the circuit layout (layout) shared by capacitor
Area so that the size of touch control induction device is reduced effectively.Further, since the quantity of required touch control electrode subtracts
Few, the difficulty about the same from capacitance controlling touch control electrode in technique declines the most simultaneously so that cost of manufacture is had
Effect reduces.
Although the present invention is disclosed above with embodiment, so it is not limited to the present invention, and any this area tool is logical
Often skill, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations, the therefore present invention
Protection domain when being as the criterion depending on the defined person of claim.
Claims (10)
1. a sensing element, it is characterised in that described sensing element comprises:
One comparator, comprises one first comparator input terminal and one second comparator input terminal；
One first switch, one end of described first switch couples with described first comparator input terminal, described first switch
The other end couple with in one first touch control electrode complimentary to one another and one second touch control electrode；
One second switch, one end of described second switch couples with described second comparator input terminal, described second switch
The other end optionally couple with described second touch control electrode；And
One controller, in order to control described first switch and described second switch；
Wherein when described first touch control electrode is touched with described second touch control electrode, described controller controls described the
One switch makes described first comparator input terminal couple with described first touch control electrode, and controls described second switch and make institute
State the second comparator input terminal to couple with described second touch control electrode, and calculate described first touch control electrode and described the
The one first of two touch control electrode is by touch location.
2. sensing element as claimed in claim 1, it is characterised in that described sensing element further includes:
In at least one variable capacitor unit, with described first comparator input terminal and described second comparator input terminal extremely
A few electric property coupling, and with described controller electric property coupling, described at least one variable capacitor unit is in order to from described
Controller receives at least one adjustment signal, adjusts at least one variable condenser list described in signal adjustment according to described at least one
The equivalent capacity of unit；
Wherein said controller is in order to calculate described according to the equivalent capacity of described at least one variable capacitor unit
One by touch location.
3. sensing element as claimed in claim 2, it is characterised in that described at least one variable capacitor unit bag
Contain:
Multiple switchable type capacitors, described switchable type capacitor is parallel with one another to be coupled, wherein said switchable type electricity
One end of container is in order to optionally to receive described adjustment signal, and the other end of described switchable type capacitor couples jointly
To described first comparator input terminal and described second comparator input terminal at least one.
4. sensing element as claimed in claim 2, it is characterised in that described at least one variable capacitor unit is also
At least one driving signal is received, in order to drive signal to described first comparator by described at least one from described controller
At least one charging in input and described second comparator input terminal.
5. sensing element as claimed in claim 1, it is characterised in that described first touch control electrode and described second
The width non-uniform Distribution of touch control electrode, described controller is in order to according to described first touch control electrode and described second touch-control
The width information of electrode calculates described first by touch location.
6. sensing element as claimed in claim 1, it is characterised in that described controller controls described first switch
Make described first comparator input terminal alternately with described first touch control electrode and described second touch control electrode electric property coupling,
And control described second switch and disconnect described second comparator input terminal and described second touch control electrode, to judge described the
One touch control electrode and described second touch control electrode by the state of touching.
7. sensing element as claimed in claim 1, it is characterised in that described sensing element further includes:
One the 3rd switch, one end of described 3rd switch couples with described second comparator input terminal, described 3rd switch
The other end optionally couple with described first touch control electrode；
Wherein said controller makes described first comparator input terminal touch with described second in order to control described first switch
Control electrode couples, and controls described second switch and disconnects described second comparator input terminal and described second touch control electrode, control
Making described 3rd switch makes described second comparator input terminal couple with described first touch control electrode, then calculates described
The one second of one touch control electrode and described second touch control electrode is by touch location, and utilizes described second to be repaiied by touch location
The most described first by touch location.
8. an inducing method, it is characterised in that described inducing method comprises:
Control one first switch by a controller, make one first comparator input terminal of a comparator be coupled to mutually
In one first touch control electrode mended and one second touch control electrode one, and control a second switch, make described comparator
One second comparator input terminal optionally couple with described second touch control electrode；And
When described first touch control electrode is touched with described second touch control electrode, control described the by described controller
One switch makes described first comparator input terminal couple with described first touch control electrode, and controls described second switch and make institute
State the second comparator input terminal to couple with described second touch control electrode, and calculate described first touch control electrode and described the
The one first of two touch control electrode is by touch location.
9. inducing method as claimed in claim 8, it is characterised in that calculate described first by touch location
Step comprises:
At least one adjustment signal is received from described controller, according to described at least one by least one variable capacitor unit
Adjust the equivalent capacity of at least one variable capacitor unit, wherein said at least one variable condenser list described in signal adjustment
First with described first comparator input terminal and in described second comparator input terminal at least one and with described controller electricity
Property couples；And
Described first quilt is calculated according to the equivalent capacity of described at least one variable capacitor unit by described controller
Touch location.
10. inducing method as claimed in claim 9, it is characterised in that adjust signal according to described at least and adjust
The step of the equivalent capacity of described at least one variable capacitor unit comprises:
By one end of the multiple switchable type capacitors coupled parallel with one another optionally receive described at least one adjustment
Signal, the other end of wherein said switchable type capacitor couples described first comparator input terminal and described second jointly
In comparator input terminal at least one.
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| US201562116934P | 2015-02-17 | 2015-02-17 | |
| US62/116,934 | 2015-02-17 |
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Also Published As
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| TW201631459A (en) | 2016-09-01 |
| CN105897239B (en) | 2018-10-23 |
| TWI553537B (en) | 2016-10-11 |
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