CN108803950A - The arrangement for detecting of touch control screen and method and touch-control system - Google Patents

The arrangement for detecting of touch control screen and method and touch-control system Download PDF

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Publication number
CN108803950A
CN108803950A CN201810395274.3A CN201810395274A CN108803950A CN 108803950 A CN108803950 A CN 108803950A CN 201810395274 A CN201810395274 A CN 201810395274A CN 108803950 A CN108803950 A CN 108803950A
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China
Prior art keywords
detecting
conductive bar
signal
driving
group
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CN201810395274.3A
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Chinese (zh)
Inventor
张钦富
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Egalax Empia Technology Inc
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Empia Technology Inc
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Priority claimed from US15/582,870 external-priority patent/US9952716B2/en
Application filed by Empia Technology Inc filed Critical Empia Technology Inc
Publication of CN108803950A publication Critical patent/CN108803950A/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The present invention provides the arrangement for detecting of touch control screen and method and touch-control system, the arrangement for detecting include：Driving circuit；Circuit for detecting；And control module, for selecting one of multiple parameters set as the initial parameter set of benchmark conductive bar to generate assessment signal, wherein the circuit for detecting is designated as flat calibration signal according to assessment signal caused by the initial parameter set, the initial parameter set for wherein corresponding to each or each group of non-referenced conductive bar is to be selected from multiple parameter sets, wherein compared with assessment signal caused by other parameters set, it is the parameter sets near the flat calibration signal according to assessment signal caused by each or the corresponding initial parameter set of each group of non-referenced conductive bar.

Description

The arrangement for detecting of touch control screen and method and touch-control system
Technical field
The invention relates to a kind of measurement method of capacitive touch screen and device, especially a kind of generate to put down quasi- image Capacitive touch screen measurement method and device.
Background technology
Capacitive touch screen is to cause detection signal to generate variation, to judge by the capacitive couplings between human body Go out the position that human body touches on capacitive touch screen.When human body touches, the noise of human body local environment also can be with human body Capacitive couplings injection between capacitive touch screen, also generates variation to detection signal.Again since noise is constantly changing, and It is not easy to be predicted, when noise is smaller, be easy to cause and can not judge to touch, or the touch location deviation judged.
Further, since signal passes through some load circuits, such as pass through capacitive couplings, the signal that receives of detecting conductive bar with It is supplied to the signal before driving conductive bar to will produce phase difference.When the period of drive signal is all identical, different phase meters Show that the signal delay different time is received, if ignoring the direct detection signal of phase difference above-mentioned, signal measurement can be caused Start phase difference and generates Different Results.If the result difference that corresponding different conductive bars measure is very big, it can cause to be difficult to Judge correct position.
In addition, relative to different driving conductive bars, the resistance value for the resistor capacitor circuit that drive signal passes through may not also Together, the high height of the value of the image obtained by touch screen when mutual capacitance type can be caused to detect is low, is unfavorable for detecting.
It can be seen that the above-mentioned prior art there will naturally be inconvenient and defect, and pole waits being further improved.To understand Certainly above-mentioned problem, relevant manufactures there's no one who doesn't or isn't painstakingly seek solution, but have no always for a long time applicable Design is developed completions, and the not appropriate structure and method of common product and method can solve the above problems, this is obvious It is the problem of related dealer is suddenly to be solved.Therefore a kind of new technology how is founded, it is real to belong to one of current important research and development project, Also becoming current industry pole needs improved target.
Invention content
In resistor capacitor circuit (RC circuit), signal can be because the load passed through be different and variant.The present invention Purpose give different detection parameters in the different driving conductive bar of correspondence so that according to each driving conductive bar detecting The signal of parameter detecting can approach as possible, to the signal of image that touch screen detects be allowed to optimize or levelized (best leveling)。
The object of the invention to solve the technical problems is realized using following technical scheme.It proposes according to the present invention A kind of touch screen signal measurement apparatus, including：Touch screen, touch screen include a plurality of driving conductive bar arranged in parallel with it is flat The a plurality of conductive bar of a plurality of detecting conductive bar composition of row arrangement, the driving conductive bar and the detecting conductive bar are overlapping In multiple crossover regions；Driving circuit provides drive signal to one or one group of driving conductive bar, wherein the driving conductive bar One or one group of driving conductive bar on the basis of conductive bar, and other or other group driving conductive bar be non-referenced conduction Item；With circuit for detecting, when each drive signal is provided, according to one of multigroup parameter group by least one detecting conductive bar Signal generates the assessment signal for the driving conductive bar for being provided drive signal；And control circuit, it is selected by the parameter group One group of initial parameter group as benchmark conductive bar, using the assessment signal that is generated by circuit for detecting according to initial parameter group as putting down Calibration signal, and each or the initial parameter group of each group of non-referenced conductive bar are selected by the parameter group respectively, wherein The assessment signal that each or each group of non-referenced conductive bar are generated according to initial parameter group is produced compared to according to other parameters group Raw assessment signal is closest to flat calibration signal.
The object of the invention to solve the technical problems, which can also be, to be realized using following technical scheme.According to this hair A kind of signal measurement method of touch screen of bright proposition, including：Touch screen is provided, touch screen includes a plurality of driving arranged in parallel The a plurality of conductive bar that conductive bar is formed with a plurality of detecting conductive bar arranged in parallel, the driving conductive bar and the detecting Conductive bar overlaps on multiple crossover regions；It selects one of the driving conductive bar or one group of driving conductive bar is conductive as benchmark Item, other or other group drive conductive bar as non-referenced conductive bar；Drive signal is provided and gives benchmark conductive bar, and foundation One of described parameter group detects the signal of the described at least one detecting conductive bar；In at least one detecting conductive bar Signal not within the scope of preset signals when, it is conductive that at least one detecting is sequentially detected according to one of other parameters group The signal of item, until the signal of at least one detecting conductive bar is fallen within the scope of preset signals；With benchmark conductive bar quilt At least one detecting conductive bar described in when providing drive signal falls within the signal within the scope of preset signals as flat calibration signal, and And using the parameter group of benchmark conductive bar foundation as the initial parameter group of benchmark conductive bar；It is sequentially provided drive signal respectively to every One or each group of non-referenced conductive bar；When each or each group of non-referenced conductive bar are provided drive signal, respectively according to Sequence detects the signal of at least one detecting conductive bar according to the parameter group；And it determines in each or each The initial parameter group of the non-referenced conductive bar of group, wherein being provided drive signal in each or each group of non-referenced conductive bar respectively The signal of value, at least one detecting conductive bar described according to initial parameter group detecting detects institute compared to according to other parameters group The signal for at least one detecting conductive bar stated is closest to flat calibration signal.
An embodiment according to the present invention, provides the arrangement for detecting of touch control screen, including：Driving circuit, for providing drive Dynamic signal is to one of the touch control screen or one group of driving conductive bar, wherein there is the one or one group driving conductive bar to be designated as One or one group of benchmark conductive bar, remaining driving conductive bar are designated as non-referenced conductive bar；Circuit for detecting is used for basis One of multiple parameters set parameter sets, at least one detecting conductive bar for measuring the touch control screen are corresponded to generating It is provided the assessment signal of the driving conductive bar of the drive signal, the wherein drive signal is provided according to the parameter sets To the driving conductive bar；And control module, for selecting one of multiple parameter sets as the benchmark conductive bar Initial parameter set to generate the assessment signal, wherein the circuit for detecting is believed according to assessment caused by the initial parameter set Number it is designated as flat calibration signal, wherein the initial parameter set corresponding to each or each group of non-referenced conductive bar is to be selected from In multiple parameter sets, wherein compared with assessment signal caused by other parameters set, it should according to each or each group Assessment signal caused by the corresponding initial parameter set of non-referenced conductive bar is the parameter set near the flat calibration signal It closes.
In the present embodiment, for acquirement initial parameter set, the wherein control under the conditions of best drive signal sensing Molding block sequentially generates assessment letter for controlling the circuit for detecting according to each parameter sets in multiple parameter sets Number, wherein being designated as benchmark conduction for generating the parameter sets of the maximum in the assessment signal of the benchmark conductive bar The corresponding initial parameter set of item.
In the present embodiment, in order to save the time to obtain initial parameter collection under the conditions of enough good drive signal sensing It closes, wherein the control module is sequentially produced according to each parameter sets in multiple parameter sets for controlling the circuit for detecting The raw assessment signal, wherein in the assessment signal for generating the benchmark conductive bar person eligible first the parameter sets It is designated as the corresponding initial parameter set of the benchmark conductive bar.
In the present embodiment, in order to save the time to obtain initial parameter set, wherein the assessment signal is via one Signal measured by the detecting conductive bar.
In the present embodiment, in order to save the more time to obtain initial parameter set, wherein the assessment signal be via Signal summation measured by at least two detecting conductive bars.
In the present embodiment, in order to obtain the image of more levelized, wherein the drive signal is by variable resistance to arrive Up at least one detecting conductive bar, the impedance of the wherein variable resistance is that this is initial accordingly when being provided according to the drive signal Initial parameter in parameter sets and change.
In the present embodiment, in order to obtain the image of more levelized, wherein the circuit for detecting is according to the drive signal quilt Initial parameter when offer in the corresponding initial parameter set and change detecting time span.
In the present embodiment, in order to obtain the image of more levelized, wherein the drive signal amplifies via signal amplifier After be supplied to the driving conductive bar, the amplification factor of the wherein signal amplifier to be corresponding when being provided according to the drive signal The initial parameter of initial parameter set and change.
In the present embodiment, in order to obtain the image of more levelized, wherein the circuit for detecting is after postponing phase difference The signal of at least one detecting conductive bar is measured, this is first accordingly when wherein the circuit for detecting is provided according to the drive signal The initial parameter of beginning parameter sets changes the delay phase difference.
An embodiment according to the present invention, provides a kind of touch-control system, including the above-mentioned touch control screen is filled with the detecting It sets.
An embodiment according to the present invention, provides the method for detecting of touch control screen, including：Specify the touch control screen one Or one group of driving conductive bar is one or one group of benchmark conductive bar, it is non-referenced conductive bar to specify remaining driving conductive bar； Drive signal is provided to the benchmark conductive bar of the touch control screen；Sequentially according to each parameter sets pair of multiple parameters set At least one detecting conductive bar of the touch control screen measures, until the result of measurement is fallen in preset range of signal；It will The measuring signal fallen in the preset range of signal is appointed as flat calibration signal, and will correspond to the ginseng of the flat calibration signal Manifold closes the initial parameter set for being appointed as the benchmark conductive bar；Being sequentially provided the drive signal, this is non-to each or each group Benchmark conductive bar；It is sequentially conductive at least one detecting of the touch control screen according to each parameter sets of multiple parameters set Item measures；And determine each or the initial parameter set of each group of non-referenced conductive bar, wherein when the driving When signal is separately provided to each or each group of non-referenced conductive bar, according to the initial parameter set from this at least one Detect the obtained signal of conductive bar than according to other parameters set from the obtained signal of at least one detecting conductive bar Closer to the flat calibration signal.
In one embodiment, in order to obtain the image of more levelized, wherein the drive signal by variable resistance to reach At least one detecting conductive bar, the impedance of the wherein variable resistance are that this is initial accordingly when being provided according to the drive signal Initial parameter in parameter sets and change.
In one embodiment, in order to obtain the image of more levelized, wherein detecting time span is according to the drive signal Initial parameter when being provided in the corresponding initial parameter set and change.
In one embodiment, in order to obtain the image of more levelized, wherein the drive signal amplifies via signal amplifier After be supplied to the driving conductive bar, the amplification factor of the wherein signal amplifier is that institute is corresponding when being provided according to the drive signal The initial parameter set initial parameter and change.
In one embodiment, in order to obtain the image of more levelized, the signal of the wherein at least one detecting conductive bar is It is measured after postponing phase difference, wherein the delay phase difference is institute's corresponding initial ginseng when being provided according to the drive signal Manifold close initial parameter and change.
By above-mentioned technical proposal, the present invention at least has following advantages and advantageous effect：Corresponding different driving is conductive Item gives different detection parameters, and the signal of image that touch screen detects can be allowed to optimize or levelized.
Description of the drawings
Fig. 1 and Fig. 4 is the condenser type touch screen of the present invention and its schematic diagram of control circuit.
Fig. 2A is the schematic diagram of single electrode drive mode.
The schematic diagram of the bipolar electrode drive mode of Fig. 2 B and Fig. 2 C.
Fig. 3 A and Fig. 3 B are the flow diagram of the method for detecting of the detecting capacitance type touch screen of the present invention.
Fig. 5 is the schematic diagram for generating complete image.
Fig. 6 is to generate the schematic diagram for inside contracting image.
Fig. 7 A and Fig. 7 B are to generate the schematic diagram for extending out image.
Fig. 8 is the flow diagram that present invention generation extends out image.
Fig. 9 A and Fig. 9 B are the schematic diagram that drive signal generates out of phase difference via different driving conductive bar.
Figure 10 and Figure 11 is the flow diagram of the signal measurement method of the touch screen of first embodiment according to the present invention.
Figure 12 is the flow diagram of the signal measurement method of another touch screen according to the present invention.
Figure 13 is the block diagram of the touch sensing system of an embodiment according to the present invention.
Figure 14 is the flow diagram of the touch detection method of an embodiment according to the present invention.
【Main element symbol description】
11：Clock pulse circuit 12：Pulse width adjusting circuit
131：Driving switch 132：Detection switch
141：Drive selection circuit 142：Detect selection circuit
151：Driving electrodes 152：Detect electrode
16：Variable resistance 17：Amplifying circuit
18：Measuring circuit 19：External conductive object
41：Driving circuit 42：Circuit for detecting
43：Storage circuit 44：Frequency is set
45：Control circuit 51：Complete image
52：The dimension sensing information 62 of single electrode driving：The dimension sensing information of bipolar electrode driving
61：Inside contract image 71：Extend out image
721：The dimension sensing information of first side single electrode driving
722：The dimension sensing information of the second side single electrode driving
S：Drive signal
1300：Touch-control system 1310：Touch control screen or panel
1311：Drive conductive bar 1312：Detect conductive bar
1320：Arrangement for detecting 1330：Driving circuit
1340：Circuit for detecting 1350：Control module
1210~1280：Step 1410~1470：Step
Specific implementation mode
It is as follows that the present invention will be described in some embodiments.However, other than disclosed embodiment, the present invention can also Other embodiments are widely used in implement.The scope of the present invention is not limited by those embodiments, is to apply for a patent Subject to scope of the claimed.And it is that clearer description is provided and enables to be familiar with this those skilled in the art to understand in the invention of the present invention Hold, it is illustrated that interior each section drawing according to its opposite size, certain sizes and other scale dependents than regular meeting quilt It highlights and the exaggeration that seems, and incoherent detail section is not also drawn completely, in the hope of the succinct of diagram.
Capacitive touch screen is highly susceptible to noise jamming, especially from touch in the human body of touch screen.The present invention Achieve the purpose that reduce noise jamming using the type of drive of adaptability.
In capacitive touch screen, including a plurality of longitudinal direction and transversely arranged electrode, for detecting the position of touch, wherein The consumption of electric power and the voltage positive correlation with the number of electrodes of time driving and driving.When carrying out touching detecting, noise may As the conductor of touch is conducted to capacitive touch screen so that signal-to-noise ratio (S/N ratio) is deteriorated, and be easy to cause the erroneous judgement of touch With position deviation.In other words, signal-to-noise ratio can change with the object of touch with residing environment dynamic.
Please refer to Fig. 1, be the present invention condenser type touch screen and its control circuit schematic diagram, including clock pulse circuit 11, Pulse width modulation circuit 12, driving switch 131, detection switch 132, driving selection circuit 141, detecting selection circuit 142, extremely Few driving electrodes 151, at least one detecting electrode 152, variable resistance 16, amplifying circuit 17 and measuring circuit 18.Capacitance Formula touch screen can be include a plurality of driving electrodes 151 and a plurality of detecting electrode 152, the driving electrodes 151 and the detecting Electrode 152 overlaps on multiple overlapping places.
Clock pulse circuit 11 provides the clock signal that whole system is provided according to working frequency, and pulse width modulation circuit 12 provide pulse width modulation signal according to clock signal and pulse width modulation parameter, to drive driving electrodes 151.Driving is opened The driving of 131 control driving electrodes is closed, and is that at least one driving electrodes 151 are selected by selection circuit 141.In addition, detecting Switch 132 controls the electrical couplings between driving electrodes and measuring circuit 18.When driving switch 131 is conducting (on), detecting Switch 132 is to disconnect (off), and pulse width modulation signal is supplied to via driving selection circuit 141 by driving selection circuit The driving electrodes 151 of 141 couplings, wherein driving electrodes 151 can be a plurality of, and selected driving electrodes 151 can be institute State one, two or a plurality of in driving electrodes 151.When driving electrodes 151 are driven by pulse width modulation signal, detecting The overlapping place that electrode 152 is overlapped with driven driving electrodes 151 will produce capacitive couplings 152, and each detecting electricity Pole 152 provides input signal when with 151 capacitive couplings of driving electrodes.Variable resistance 16 is to provide resistance according to resistance parameter Anti-, input signal is to be supplied to detecting selection circuit 142 via variable resistance 16, and detecting selection circuit 142 is by a plurality of detecting electricity Selected in pole 152 one, two, three, a plurality of or all detecting electrode 152 is coupled in amplifying circuit 17, input signal be through By amplifying circuit 17 according to being supplied to measuring circuit 18 after gain parameter.Measuring circuit 18 be according to pulse width modulation signal and Clock signal detect input signal, wherein measuring circuit 18 can be according to phase parameter at least one phase be detection signal It is sampled, such as measuring circuit 18 can have at least one integrating circuit, each integrating circuit is respectively according to phase Parameter integrates the input signal in the input signal at least one phase, to measure the size of input signal.? In one example of the present invention, each integrating circuit can also be respectively according to phase parameter at least one phase to described defeated The signal difference for entering a pair of input signals in signal is integrated, or respectively according to phase parameter at least one phase pair The difference of the signal difference of two pairs of input signals in the input signal integrates.In addition, measuring circuit 18 can also include to be The result that integrating circuit is detected is changed into digital signal by a few analog-to-digital electric (ADC).In addition, this technology neck has The those of ordinary skill of usual knowledge it can be deduced that input signal above-mentioned can be first pass through after amplifying circuit 17 amplifies again by Detecting selection circuit 142 is supplied to measuring circuit 18, and the present invention is not limited thereto.
In the present invention, capacitive touch screen has at least two drive modes, be divided into most power saving single electrode drive mode, Bipolar electrode drive mode, and have at least one driving current potential.Each drive mode has corresponding to different driving current potentials At least one working frequency, each working frequency corresponds to one group of parameter, and each drive mode corresponds to different drives Electrokinetic potential represents different degrees of power consumption.
The electrode of capacitive touch screen can be divided into a plurality of driving electrodes 151 and a plurality of detecting electrode 152, the driving electricity Pole 151 overlaps on multiple overlapping places (intersection) with the detecting electrode 152.Fig. 2A is please referred to, is driven in single electrode In pattern, a driving electrodes 151 are once driven, that is, only have a driving electrodes 151 to be provided driving in the same time Signal S detects the signal of all detecting electrodes 152 to generate dimension sensing money when any bar driving electrodes 151 are driven News.Accordingly, after driving all driving electrodes 151, the dimension sensing money corresponding to each driving electrodes 151 can be obtained News, to constitute the complete image relative to all overlapping places.
Fig. 2 B and 2C are please referred to, it is primary to drive adjacent pair driving electrodes 151 in bipolar electrode drive mode.Change speech It, the driving electrodes 151 of n items will drive n-1 times altogether, and when a pair of of driving electrodes 151 in office are driven, and detect all detectings The signal of electrode 152 is to generate dimension sensing information.For example, first such as Fig. 2 B, while drive signal S being provided and is driven to first Dui Moving electrode 151, if there is 5 it is necessary to driving 4 times.Next, as shown in Figure 2 C, while drive signal S being provided and is driven to second Dui Moving electrode 151, and so on.Accordingly, it is driving per a pair of of driving electrodes 151 after (total n-1 to), can obtain corresponding to each To the dimension sensing information of driving electrodes 151, image is inside contracted relative to aforementioned complete image to constitute, inside contracts the picture of image Prime number amount is less than the pixel quantity of complete image.In another example of the present invention, bipolar electrode drive mode further includes right respectively Both sides driving electrodes 151 carry out single electrode driving, and when either side list driving electrodes 151 are driven, detect all detectings The signal of electrode 152 is to generate dimension sensing information, to be additionally provided two dimension sensing informations, is formed with image is inside contracted Extend out image.Such as it is respectively placed in outside the both sides for inside contract image corresponding to the dimension sensing information of both sides and extends out shadow to form Picture.
The art has the ordinary person of usual knowledge it can be deduced that the present invention more may include three electrode drive moulds Formula, four electrode drive patterns etc., details are not described herein.
Driving current potential above-mentioned can be including but not limited at least two driving current potentials, as low-driving potential drives with high Current potential, higher driving current potential have higher signal-to-noise ratio.
According to aforementioned, in single electrode drive mode, complete image can be obtained, and in bipolar electrode drive mode, it can Acquirement inside contracts image or extends out image.Complete image, interior epitome or extend out image can be external shaping claviform 19 it is close or It is obtained when touching before capacitive touch screen with capacitive touch screen, judges that outside is led so as to generating the variable quantity of each pixel The position of electric object 19.Wherein, the external conductive object 19 can be one or more.Also it has been observed that external conductive object When part 19 is close or touches capacitive touch screen, or with the driving electrodes 151 and 152 capacitive couplings of detecting electrode, And noise jamming is caused, even if driving electrodes 151 are not driven, external conductive object 19 may also be with driving electricity Pole 151 and 152 capacitive couplings of detecting electrode.In addition, noise may also be interfered from other approach.
Accordingly, in one example of the present invention, when carrying out noise detection process, driving switch 131 disconnects, and detects Switch 132 is connected, and measuring circuit can generate the dimension sensing of noise detecting according to the signal of the detecting electrode 152 at this time Information, so as to judging noise jamming whether in accordance with permissible range.For example, it may be judging the dimension sensing money of noise detecting Whether news have any value to be more than the totalling of all values for the dimension sensing information that threshold limit value or noise are detected or be averagely Whether no is more than threshold limit value, to judge noise jamming in accordance with permissible range.The art has the technology people of general knowledge Member can deduce dimension sensing information that other are detected by noise judge noise jamming whether in accordance with permissible range side Formula, the present invention are not repeated here.
Noise detection process can be obtained aforementioned complete image when system is activated or each time, inside contract image or outer Carried out when expanding image, can also be carry out timing or through repeatedly obtaining aforementioned complete image, inside contracting image or extending out image when, or It is to have detected external conductive object to approach or carry out when touching, there is the art the technical staff of general knowledge can push away Know that other carry out the opportune moment of noise detection process, the present invention is not limited thereto.
It is to carry out frequency error factor when judging that noise jamming exceeds permissible range the present invention additionally provides sound interval sequence is changed.It surveys Amount circuit is provided the setting of multigroup frequency, can be stored in memory or other store medias, to provide measuring circuit in changing It is selected in sound interval sequence, and according to the clock signal for the FREQUENCY CONTROL clock pulse circuit 11 selected.It can be in the frequency to change sound interval sequence Appropriate frequency setting is picked out in rate setting one by one, such as is selected one of which frequency one by one and set and carry out noise detection process, Until detecting noise jamming in accordance with permissible range.It can also be to be picked out one by one most in frequency setting to change sound interval sequence Good frequency setting.Such as noise detection process is selected and carried out one by one in frequency setting, detect wherein that noise jamming is most Small frequency setting, the maximum value for such as detecting the dimension sensing information of noise detecting are frequency setting or the noise of minimum The totalling of all values of the dimension sensing information of detecting or the frequency setting of average out to minimum.
The frequency setting corresponds to including but not limited to drive mode, frequency and parameter group.Parameter group can be packet It includes but is not limited to the group selected from following collection：Aforementioned resistance parameter, aforesaid gains parameter, Such phase parameter and aforementioned pulse Width modulation parameter, those of ordinary skill of this technology neck with usual knowledge can deduce that other are suitable for capacitive touch screen And its relevant parameter of control circuit.
Frequency setting can be including multiple driving current potentials as shown in following table 1, it is following with the first driving current potential with For second driving current potential, it can be that there are three types of above drives that there is the art the ordinary person of usual knowledge, which can deduce, Electrokinetic potential.Driving current potential can there are many drive modes respectively for each, are including but not limited to selected from the group of following collection：It is single Electrode drive pattern, bipolar electrode drive mode, three electrode drive patterns, four electrode drive patterns etc..Each driving current potential Each corresponding drive mode is respectively provided with multi-frequency, each frequency corresponds to a kind of parameter group above-mentioned.This technology There is the ordinary person of usual knowledge can deduce that the frequency of each each corresponding drive mode of driving current potential can in field Can also be to have part identical, the present invention does not limit to be entirely different.
Table 1
According to above-mentioned, the present invention provides a kind of method for detecting of detecting capacitance type touch screen, please refers to Fig. 3 A.First such as Shown in step 310, multiple frequency settings are sequentially stored according to power consumption size, the setting of each frequency is respectively corresponding to a kind of driving A kind of drive mode of current potential, and the setting of each frequency has frequency and parameter group, wherein driving current potential has at least one. Next, as shown at step 320, the setting of the parameter group initialization survey circuit according to one of frequency setting, and such as Shown in step 330, the parameter group according to measuring circuit detects the signal from the detecting electrode with measuring circuit, and according to next Dimension sensing information is generated from the signal of the detecting electrode.Next, as shown in step 340, according to the dimension Sensing information judges whether the interference of noise exceeds permissible range.Then, as shown in step 350, super in the interference of the noise When crossing the permissible range, sequentially the frequency according to one of the frequency setting changes the working frequency respectively with parameter group The dimension sensing information is generated after setting with the measuring circuit, and judges institute according to the dimension sensing information Whether the interference for stating noise exceeds the permissible range, until the interference of the noise is less than Cheng Suoshu permissible ranges.Also may be used To be as shown in the step 360 of Fig. 3 B, when the interference of the noise is more than the permissible range, according to the setting of each frequency Frequency generates the dimension sensing information after changing the working frequency and the setting of the measuring circuit respectively with parameter group, And the interference of the noise is judged according to the dimension sensing information, and to be set by the minimum frequency of the noise jamming Fixed frequency changes the setting of the working frequency and the measuring circuit with parameter group respectively.
It is a kind of arrangement for detecting of detecting capacitance type touch screen according to the present invention such as shown in Fig. 4, including：Storage electricity Road 43, driving circuit 41, circuit for detecting 42.As shown in abovementioned steps 310, storage circuit 43 includes that multiple frequencies set 44, point It is not stored sequentially according to power consumption size.Storage circuit 43 can be with circuit, memory or any storage matchmaker that can store electromagnetic recording Body.In one example of the present invention, frequency setting 44 can be constituted in a manner of tabling look-up, in addition, frequency setting 44 can be with Store power consumption parameter.
Driving circuit 41 can be the integrated of multiple circuits, clock pulse circuit 11 including but not limited to above-mentioned, pulse width Modulation circuit 12, driving switch 131, detection switch 132 and driving selection circuit 141.Institute's column circuits are convenient in this example The present invention illustrates that driving circuit 41 can only include part circuit or more circuits is added, and the present invention is not limited thereto.It is described Driving circuit is at least one driving electrodes 151 for providing drive signal to capacitive touch screen according to working frequency, Middle capacitive touch screen includes a plurality of driving electrodes 151 and a plurality of detecting electrode 152, the driving electrodes 151 and the detecting Electrode 152 overlaps on multiple overlapping places.
Circuit for detecting 42 can be the integrated of multiple circuits, including but not limited to aforementioned measuring circuit 18, amplifying circuit 17, Detect selection circuit 142, it might even be possible to be include can power transformation group 16.Institute's column circuits are to facilitate explanation of the present invention in this example, Circuit for detecting 42 can only include part circuit or more circuits is added, and the present invention is not limited thereto.In addition, circuit for detecting 42 It further includes and executes abovementioned steps 320 to step 340, and execute step 350 or step 360.In the example of Fig. 3 B, the frequency Rate setting can sequentially be stored not based on power consumption size.
As it was earlier mentioned, for judging whether the interference of the noise exceeds the dimension sensing of the permissible range Information is generated when the drive signal is not provided to the driving electrodes.For example, be driving selection circuit 131 be disconnect And it is when conducting to detect selection circuit 132.
In one example of the present invention, at least one driving current potential there are many drive mode, the drive mode includes single Electrode drive pattern and bipolar electrode drive mode, wherein the drive signal described in single electrode drive mode only provides institute with the time State one of driving electrodes, and in bipolar electrode drive mode, the drive signal only provided with the time driving electrodes it It is a pair of.The power consumption size of the wherein described single electrode drive mode is less than the power consumption size of the bipolar electrode drive mode.In addition, In the single electrode drive-type, the circuit for detecting be when each driving electrodes are provided drive signal respectively generate described in Dimension sensing information, to constitute complete image, and wherein in the bipolar electrode drive-type, the circuit for detecting is every The dimension sensing information is generated when a pair of of driving electrodes are provided drive signal respectively, inside contracts image to constitute, wherein institute It states and inside contracts pixel of the pixel of image less than the complete image.In addition, circuit for detecting can be wrapped more in bipolar electrode drive mode It includes and two lateral electrodes is driven respectively, and when the single driving electrodes of either side are driven, detect all detecting electrodes Signal to generate the dimension sensing information respectively, wherein respectively to two lateral electrodes driven caused by two it is one-dimensional Degree sensing information is placed in described inside contract and extends out image outside the both sides of image to form, and the pixel for extending out image is more than The pixel of the complete image.
In another example of the present invention, the driving current potential includes the first driving current potential and the second driving current potential, wherein The power consumption size of the complete image is generated corresponding to the single electrode drive mode of the first driving current potential>Corresponding to institute State the power consumption size that image is inside contracted described in the bipolar electrode drive mode generation of the first driving current potential>It is driven corresponding to described second The single electrode drive mode of electrokinetic potential generates the power consumption size of the complete image.
In another example of the present invention, the driving current potential includes the first driving current potential and the second driving current potential, wherein The power consumption size of the complete image is generated corresponding to the single electrode drive mode of the first driving current potential>Corresponding to institute The single electrode drive mode for stating the second driving current potential generates the power consumption size of the complete image.
In addition, in one example of the present invention, the signal that each detects electrode is to first pass through variable resistance respectively to carry again Supply the circuit for detecting, the circuit for detecting is to set the variable resistance according to the parameter group of one of frequency setting Impedance.In addition, the signal of the detecting electrode is just detected after first passing through at least one amplifying circuit amplified signal, it is described to detect Slowdown monitoring circuit is the gain that the amplifying circuit is set according to the parameter group of one of frequency setting.Furthermore the drive signal It is the parameter group generation according to one of frequency setting.
In one example of the present invention, each value of the dimension sensing information be respectively the period with setting according to institute The signal for stating detecting electrode generates, wherein the period of the setting is set according to the parameter group of one of frequency setting It is fixed.In another example of the present invention, each value of the dimension sensing information is respectively with the phase of at least one setting Position is generated according to the signal of the detecting electrode, wherein the phase of the setting is the parameter according to one of frequency setting Group is set.
In addition, driving circuit 41 above-mentioned, circuit for detecting 42 can be controlled by control circuit 45 with storage circuit 43.Control Circuit 45 processed can be can Programming processor, can also be other control circuits, the present invention is not intended to limit.
Fig. 5 is please referred to, for the schematic diagram of single electrode drive mode according to the present invention.Drive signal S is sequentially provided to One driving electrodes, Article 2 driving electrodes ..., to the last driving electrodes, and driven in each driving electrodes The dimension sensing information 52 of single electrode driving is generated when dynamic signal S drivings.Set each driving electrodes generate when being driven Single electrode driving dimension sensing information 52, may make up complete image 51, each value difference of complete image 51 is corresponding The capacitively coupled variation of one of the electrode confluce.
In addition, each value of complete image is respectively corresponding to the position at one of described overlapping place.For example, each drives The middle position of electrode is respectively corresponding to the first dimension coordinate, and the center of each detecting electrode is respectively corresponding to second Dimension coordinate.First dimension coordinate can be laterally (or horizontal, X-axis) coordinate and longitudinally (or vertical, Y-axis) coordinate it One, and the second dimension coordinate can be the another of laterally (or horizontal, X-axis) coordinate and longitudinally (or vertical, Y-axis) coordinate. Each overlapping place is respectively corresponding to overlap on the two-dimensions coordinate of the driving electrodes and detecting electrode at overlapping place, two-dimensions coordinate It is to be made of the first dimension coordinate and the second dimension coordinate, such as (the first dimension coordinate, the second dimension coordinate) or (the Two dimension coordinates, the first dimension coordinate).In other words, the dimension sensing information of each single electrode driving is respectively corresponding to Each value of the dimension sensing information of the first dimension coordinate in one of described driving electrodes center, wherein single electrode driving The first dimension coordinate that (or each value of complete image) is respectively corresponding to one of described driving electrodes center is detectd with described Survey the two-dimensions coordinate that the second dimension coordinate in one of electrode center is constituted.Similarly, each value of complete image distinguishes phase The middle position that one of place is overlapped described in Ying Yu, that is, be respectively corresponding to the first dimension coordinate in one of described driving electrodes center The two-dimensions coordinate constituted with one of the second central dimension coordinate of the detecting electrode.
Fig. 6 is please referred to, for the schematic diagram of bipolar electrode drive mode according to the present invention.Drive signal S is sequentially provided to A pair of of driving electrodes, second pair of driving electrodes ..., to the last a pair of of driving electrodes, and driven in every a pair of of driving electrodes The dimension sensing information 62 of bipolar electrode driving is generated when dynamic signal S drivings.In other words, N driving electrodes may make up N-1 pairs (multipair) driving electrodes.The dimension sensing information 62 for the bipolar electrode driving that set generates when being driven per a pair of of driving electrodes, It may make up and inside contract image 61.Inside contract the value (or pixel) of image 61 quantity be less than complete image 51 value (or pixel) number Amount.Relative to complete image, the dimension sensing information for inside contracting each bipolar electrode driving of image is respectively corresponding to a pair of of drive First dimension coordinate of middle position between moving electrode, and each value is respectively corresponding to center between aforementioned a pair of of driving electrodes The two-dimensions coordinate that the second dimension coordinate in one of the first dimension coordinate of position and the detecting electrode center is constituted.It changes Yan Zhi, each value for inside contracting image are respectively corresponding to central position between a pair of overlapping place, that is, are respectively corresponding to a pair of of driving The the first dimension coordinate and one of the detecting electrode of middle position are central between electrode (or one of described multipair driving electrodes) The second dimension coordinate constitute two-dimensions coordinate.
Fig. 7 A are please referred to, to carry out the schematic diagram of the first side single electrode driving in bipolar electrode drive mode under this invention. Drive signal S is provided to the driving electrodes closest to the first side of capacitive touch screen, and closest to capacitive touch screen The first side dimension sensing information 721 of single electrode driving is generated when the driving electrodes of first side are driven by drive signal S.It asks again It is the schematic diagram that the second side single electrode driving is carried out in bipolar electrode drive mode under this invention with reference to Fig. 7 B.Drive signal S quilts The driving electrodes closest to capacitive touch screen the second side are supplied to, and in the driving closest to capacitive touch screen the second side The second side dimension sensing information 722 of single electrode driving is generated when electrode is driven by drive signal S.First side and the second side The dimension sensing information 721 and 722 for the single electrode driving that driving electrodes generate when being driven, which is respectively disposed in, inside contracts image 61 The first side and the second side outer extend out image 71 to constitute.The quantity for extending out the value (or pixel) of image 71 is more than complete image 51 Value (or pixel) quantity.It is the first side dimension sensing money for first generating single electrode driving in one example of the present invention News 721, then generate and inside contract image 61, then the second side dimension sensing information 722 of single electrode driving is generated, extend out shadow to constitute As 71.It is first to generate to inside contract image 61, then generate the first side of single electrode driving and the respectively in another example of the present invention Two side dimension sensing informations 721 and 722 extend out image 71 to constitute.
In other words, extending out image is the first side dimension sensing information sequentially driven by single electrode, inside contracts image and list The second side dimension sensing information of electrode drive is constituted.Value due to inside contracting image 61 is bipolar electrode driving, average big The mean size of small the first side and the value of the second side dimension image that can be more than single electrode driving.In one example of the present invention In, the first side and the value of the second side dimension sensing information 721 and 722 are just to be respectively placed in inside contract image after ratio enlargement Outside 61 the first side and the second side.The ratio can be preset multiple, this preset multiple is more than 1, can also be according to double electricity Ratio between the value of the dimension sensing information of pole driving and the value of the dimension sensing information of single electrode driving generates.E.g. The all values summation (or average) of the dimension sensing information 721 of first side is sensed with the dimension for inside contracting adjacent first side in image The ratio of 62 all values summation of information (or average), the value of the first side dimension sensing information 721 is after this ratio enlargement It is just placed in outside the first side for inside contracting image 61.Similarly, be the second side dimension sensing information 722 all values summation it is (or flat ) with the ratio for the 62 all values summation of dimension sensing information (or average) for inside contracting in image adjacent the second side, the second side is one-dimensional The value for spending sensing information 722 is just placed in after this ratio enlargement outside the second side for inside contracting image 61.In another example ratio above-mentioned Example can be inside contract all values summation (or average) of image 61 and the first side and the second side dimension sensing information 721 and The ratio of 722 all values summation (or average).
In single electrode drive mode, each value (or pixel) of complete image is stacked the two-dimensions position at place (or coordinate) is corresponding to detecting electrode by being mutually laminated on the driving electrodes being stacked corresponding first dimension position (or coordinate) The second dimension position (or coordinate) constituted, such as (the first dimension position, the second dimension position) or (the second dimension Position, the first dimension position).Single external conductive object may overlap place's capacitive couplings with one or more, with outside The capacitively coupled overlapping place of shaping claviform will produce capacitively coupled variation, reacts and is worth accordingly in complete image, It reacts in external shaping claviform corresponding in complete image accordingly in value.Therefore according to external conductive object corresponding to complete In image accordingly value with two-dimensions coordinate, the centroid position (two-dimensions coordinate) of external conductive object can be calculated.
An example according to the present invention, in single electrode drive mode, each electrode (driving electrodes and detecting electrode) Corresponding dimension position is the position in electrode center.Another example according to the present invention, it is each in bipolar electrode drive mode Between electrode (driving electrodes and detecting electrode) corresponding dimension position position central for two electrodes.
In interior epitome picture, first dimension sensing information corresponds to the middle position of first pair of driving electrodes, i.e., and the The first central dimension position between one and Article 2 driving electrodes (first pair of driving electrodes).If it is merely calculating matter Heart position, then can only calculate the position that first pair of driving electrodes is central and last is between driving electrodes center, and foundation inside contracts The range of the calculated position of image lacks first pair of driving electrodes middle position (the first central dimension position) and first Range between driving electrodes middle position and last to driving electrodes middle position and the last item driving electrodes center position Range between setting.
It relative to image is inside contracted, extends out in image, the first side is respectively corresponding to first with the second side dimension sensing information The position of item and the last item driving electrodes center, therefore foundation extends out the range ratio of the calculated position of image according to interior epitome As the range of calculated position increases first pair of driving electrodes middle position (the first central dimension position) and first Range between driving electrodes middle position and last to driving electrodes middle position and the last item driving electrodes center position Range between setting.In other words, include according to the calculated position of complete image according to the range of the calculated position of image is extended out The range set.
Similarly, bipolar electrode drive mode above-mentioned can more expand as multi-electrode drive mode, that is, drive simultaneously A plurality of driving electrodes.In other words, drive signal is a plurality of (all) driving electrodes being supplied to simultaneously in one group of driving electrodes, example As the driving electrodes quantity of one group of driving electrodes has two, three or four.The multi-electrode drive mode includes above-mentioned Bipolar electrode drive mode does not include single electrode drive mode above-mentioned.
Fig. 8 is please referred to, for a kind of method for detecting of detecting capacitance type touch screen according to the present invention.As shown in step 810, There is provided has the capacitive touch screen of a plurality of driving electrodes sequentially arranged in parallel and a plurality of detecting electrode, wherein the driving is electric Pole is with the detecting electrode crossover in multiple overlapping places.Such as driving electrodes above-mentioned 151 and detecting electrode 152.Next, such as Shown in step 820, respectively single electrode drive mode and multi-electrode drive mode provide drive signal to the driving electrodes it One of one and the driving electrodes organize driving electrodes.It is, the drive signal is only to provide every time in monopole drive mode To one of described driving electrodes, and the drive signal is every time while to be provided the driving electricity in multi-electrode drive mode One group of driving electrodes of pole, wherein other than last N driving electrodes, each driving electrodes in rear two adjacent driving electrodes Composition while driven one group of driving electrodes, and the driving electrodes quantity that N is one group of driving electrodes subtracts one.Drive signal Offer can be provided by driving circuit 41 above-mentioned.Next, as shown in step 830, in each drive signal When being provided, dimension sensing information is obtained by the detecting electrode, is driven with obtaining multiple multi-electrodes in multi-electrode drive mode Dynamic dimension sensing information and the dimension sensing in single electrode drive mode the first side of acquirement and the driving of the second side single electrode Information.For example, in multi-electrode drive mode, a multi-electrode is obtained respectively when each group of driving electrodes are provided drive signal The dimension sensing information of driving.In another example in single electrode drive mode, driven in first driving electrodes and the last item Electrode obtains the first side single electrode driving respectively dimension sensing information when providing drive signal drives with the second side single electrode Dimension sensing information.The acquirement of dimension sensing information can be obtained by above-mentioned circuit for detecting 42.Described is one-dimensional Degree sensing information includes the dimension sensing information (inside contracting image) that the multi-electrode drives and the first side and the second side single electrode The dimension sensing information of driving.Next, as illustrated in step 840, the dimension sequentially driven according to the first side single electrode Sensing information, the dimension sensing information of all multi-electrodes driving and the dimension sensing information of the second side single electrode driving produce Raw image (extending out image).Step 840 can be completed by aforementioned control circuit.
As it was earlier mentioned, the current potential of drive signal and the drive signal in multi-electrode drive mode in single electrode drive mode Current potential be not necessarily intended to identical, can be identical, can also be difference.Such as single electrode driving is with the first larger alternating current Position drives, and relative to the second ac potential of multi-electrode driving, the ratio of the first ac potential and the second ac potential is pre- If ratio.In addition, it is point that step 840, which is according to the first side and all values of the dimension sensing information of the second side single electrode driving, It is not multiplied by identical or different pre-set ratio to generate the image.In addition, in single electrode drive mode drive signal frequency Rate is different from the frequency of the drive signal in multi-electrode drive mode.
The driving electrodes quantity of one group of driving electrodes can have two, three, and even more, the present invention is not limited System.In the better model of the present invention, the driving electrodes quantity of one group of driving electrodes is two.In the driving of one group of driving electrodes When number of electrodes is two, each driving electrodes are respectively corresponding to the first latitude coordinates, wherein each more (double) electrode drives Dimension sensing information is respectively corresponding to central the first dimension coordinate between a pair of of driving electrodes of the driving electrodes, and First side and the dimension sensing information of the second side single electrode driving are respectively corresponding to first and the last item driving electrodes First dimension coordinate.
Similarly, when the driving electrodes quantity of one group of driving electrodes is a plurality of (two or more), each driving electrodes difference Corresponding to the first latitude coordinates, wherein the dimension sensing information of each multi-electrode driving is respectively corresponding to the driving electrodes First dimension coordinate central between two driving electrodes of lie farthest away in one group of driving electrodes, and the first side and the second side The dimension sensing information of single electrode driving is respectively corresponding to first the first dimension coordinate with the last item driving electrodes.
In addition, each detecting electrode is respectively corresponding to the second dimension coordinate, and each dimension sensing information is every One value is respectively corresponding to the second dimension coordinate of one of described detecting electrode.
Fig. 9 A and Fig. 9 B are please referred to, receives the signal of capacitive couplings signal via driving conductive bar for detecting conductive bar Figure.Since signal passes through some load circuits, such as pass through capacitive couplings, the signal and be supplied to driving that detecting conductive bar receives Signal before conductive bar will produce phase difference.For example, when drive signal is supplied to first driving conductive bar, first detecting is led The signal and the signal before driving conductive bar is supplied to will produce first phase difference ψ 1 that electric item is received, as shown in Figure 9 A, and drive When signal is supplied to Article 2 to drive conductive bar, signal and be supplied to the letter before driving conductive bar that first detecting conductive bar is received Number second phase difference ψ 2 is will produce, as shown in Figure 9 B.
First phase difference ψ 1 and second phase difference ψ 2 can with drive signal by resistor capacitor circuit (RC Circuit) different and difference.When the period of drive signal is all identical, different phase differences indicates that signal delay is different Time be received, if ignoring the direct detection signal of phase difference above-mentioned, the beginning phase of signal measurement can be caused different and Generate Different Results.For example, it is assumed that when phase difference is 0, and signal is string wave, and amplitude is A.When phase be 30 degree, 90 When degree, 150 degree, 210 degree, 270 degree and 330 degree of detection signals, can respectively obtain | 1/2A |, | A |, | 1/2A |, | -1/2A |, | - A | with | -1/2A | signal.But when phase difference is 150 degree, the phase for starting to measure causes a deviation, so that becoming in phase Position be 180 degree, 240 degree, 300 degree, 360 degree, 420 degree and when 480 degree of detection signals, can respectively obtain 0,0、WithSignal.
By in previous example, it can be seen that the delay of the initial phase measured caused by Such phase differences can to believe Number result measured is entirely different, and no matter drive signal is string wave or square wave (such as PWM), all can be with the presence of similar difference.
In addition, when drive signal is provided every time, adjacent a plurality of driving conductive bar can be available to, wherein driving is led Electric item is sequentially arranged in parallel.It is available to two adjacent driving conductive bars in the preferable example invented, therefore one In secondary scanning, n items driving conductive bar is provided n-1 drive signal altogether, is supplied to one group of driving conductive bar every time, for example, the It is primary to be supplied to first to drive conductive bar with Article 2, it is supplied to Article 2 to drive conductive bar with Article 3 for the second time, according to this Analogize.As it was earlier mentioned, drive signal when being provided every time, one group of driving conductive bar being provided can be one, two or More a plurality of, the present invention is not intended to limit the quantity for the driving conductive bar that each drive signal provides.When each drive signal is provided, The signal that all detecting conductive bars measure can assemble dimension sensing information, gather all dimensions sensing in single pass Information may make up two-dimension sensing information, can be considered image.
Accordingly, it is to use different phase differences for different conductive bars in the first embodiment of optimal mode of the present invention To postpone detection signal.For example, first determine multiple phase differences, respectively when each group of driving conductive bar is provided drive signal, Carry out measuring signal according to each phase difference, phase difference based on the maximum is that most approach is supplied to drive in the signal measured Signal before moving conductive item and detecting conductive bar receive after signal between phase difference, be known as most approaching phase in the following description Difference.The measurement of signal can select one of described detecting conductive bar to be measured according to each phase difference, or select more Item all detects conductive bar to be measured according to each aberration, according to a plurality of or all detecting conductive bars signal summations To judge most to approach phase difference.According to above-mentioned, it can be determined that go out the most approach phase difference of each group of conductive bar, in other words, When each group of conductive bar is provided drive signal, after all detecting conductive bar delays are provided the most approach phase difference of drive signal Just measure.
Can be in (multiple) phase differences in addition it is also possible to be that need not carry out measuring signal according to all aberrations Sequentially carry out measuring signal according to a phase difference, stops when successively decreasing after finding that the signal measured is incremented by, wherein measuring Signal in phase difference based on the maximum be most to approach phase difference.In this way, the larger image of signal can be obtained.
Alternatively, it is also possible to be first to select drive conductive bar one group as benchmark conductive bar, other conductive bars are known as Non-referenced conductive bar first detects the most approach phase difference of benchmark conductive bar, as flat accurate (level) phase difference, then detects non-base Quasi- driving conductive bar most approaches the phase difference for putting down quasi- phase difference, referred to as most flat quasi- phase difference.For example, with benchmark conductive bar Put down quasi- phase difference measurement signal as flat calibration signal, respectively it is non-referenced to each group driving conductive bar each phase difference into The measurement of row signal most taps into phase difference based on flat calibration signal person using in the signal measured as being provided drive signal Driving conductive bar put down quasi- phase difference.In this way, the flat quasi- phase difference of each group of driving conductive bar is can determine whether out, according to each group Driving conductive bar puts down measurement of the quasi- phase difference come signal after postponing, and can be obtained and relatively puts down accurate image, i.e., between the signal in image Difference very little.In addition, flat calibration signal can fall within default working range, not necessarily needing to be most preferably can peak signal.
It is to use same phase poor with all detecting conductive bars when each drive signal is provided in preceding description, this Technical field has the technical staff of usual knowledge it can be deduced that can also be each group when each drive signal is provided Detecting conductive bar, which uses, to be respectively adopted respective most approach phase difference or puts down quasi- phase difference.In other words, it is in each drive signal When being provided, the measurement of signal is carried out to each phase difference of each group of detecting conductive bar respectively, to judge most to approach phase Difference puts down quasi- phase difference.
Can also be with not in fact, other than the image using aberration come delay measurements to obtain larger or relatively flat standard Enlargement ratio together, impedance, time of measuring relatively put down accurate image to obtain.
Accordingly, the present invention proposes the signal measurement method of touch screen, as shown in Figure 10.As shown in step 1010, provide tactile Screen is touched, touch screen includes a plurality of the leading of a plurality of driving conductive bar and a plurality of detecting conductive bar composition arranged in parallel arranged in parallel Electric item, the driving conductive bar overlap on multiple crossover regions with the detecting conductive bar.In addition, as shown in step 1020, Determine the delay phase difference of each or each group of driving conductive bar.Later, as shown in step 1030, it is sequentially provided drive signal One or one group into the driving conductive bar, it is provided the driving conductive bar of drive signal and the detecting conductive bar Generate mutual capacitive couplings.Next, as shown in step 1040, when each drive signal is provided, it is provided drive signal The signal of each detecting combination be just to be measured after the corresponding phase difference of delay.
Accordingly, in the signal measurement apparatus of inventive touch screen, aforementioned step 1030 can be by driving above-mentioned Circuit 41 is implemented.In addition, step 1040 can be implemented by circuit for detecting 42 above-mentioned.
In one example of the present invention, the delay phase difference of each or each group of driving conductive bar is by multiple predetermined phases It is selected in potential difference, such as selects and above-mentioned most approach phase difference.Each group of conductive bar is referred in a plurality of driving while being provided One group of a plurality of conductive bar of drive signal, such as implemented by the driving selection circuit 141 of driving circuit 41 above-mentioned.For example, One of the driving conductive bar or one group of conductive bar are sequentially selected as conductive bar is selected, such as by driving circuit 41 reality It applies.Next, being selected the delay phase difference of conductive bar by being picked out in multiple predetermined phase differences.Wherein, in drive signal quilt It is supplied to when being selected conductive bar, postpones after the signal measured after the delay phase difference is more than delay other predetermined phase differences The signal detected.For example, being to be implemented by circuit for detecting 42 above-mentioned, the delay phase difference detected can be stored in storage Circuit 43.
Flat quasi- phase difference above-mentioned is selected in addition, can also be.For example, selecting one or one group of the driving conductive bar Conductive bar is as benchmark conductive bar, other or other group conductive bar is as non-referenced conductive bar, such as by driving circuit 41 real It applies.Later, by picking out the delay phase difference of benchmark conductive bar in multiple predetermined phase differences, wherein being provided in drive signal When benchmark conductive bar, postpone the signal detected after the delay phase difference and be more than to detect after delay other predetermined phase differences Signal.Wherein, the delay phase difference of benchmark conductive bar is flat quasi- phase difference above-mentioned.Next, postponing institute with benchmark conductive bar The signal detected after the delay phase difference stated is as reference signal, then sequentially selects one or one of the non-referenced conductive bar The non-referenced conductive bar of group, which is used as, is selected conductive bar, and the delay of conductive bar is selected by being picked out in multiple predetermined phase differences Phase difference, as the aforementioned most flat quasi- phase difference postpone described prolong wherein when drive signal is provided to and is selected conductive bar The signal detected after slow phase difference is compared to the signal for postponing to detect after other predetermined phases are poor closest to reference signal.With On, can be implemented by circuit for detecting 42.
In one example of the present invention, when drive signal is provided to benchmark conductive bar or is or become heir to the conductive bar of choosing, by institute The signal of a plurality of measurement in the detecting conductive bar stated is the signal measured by one of the detecting conductive bar.In other words, it is Delay phase difference is picked out according to the signal of phase same detecting conductive bar.In another example of the present invention, drive signal When being provided to benchmark conductive bar or being or become heir to the conductive bar of choosing, the signal by a plurality of measurement in the detecting conductive bar be by The summation for the signal that at least two detecting conductive bars of the detecting conductive bar measure.In other words, it is according to identical a plurality of The summation of the signal of conductive bar or the detecting conductive bar of whole is detected to pick out delay phase difference.
As it was earlier mentioned, can be that each or each group are overlapped on driving conductive bar with each detecting conductive bar Crossover region has corresponding delay phase difference.In the following description, it is to hand over each or each group of driving conductive bar and respectively Folded each or each group of detecting conductive bar are combined as detecting.In other words, drive signal can be supplied to simultaneously one or A plurality of driving conductive bar, and signal can also be to be measured by one or more detecting conductive bar.When generating signal through measuring, drive The one or more driving conductive bar that dynamic signal is provided is known as detecting with one or more detecting conductive bar being measured to be combined. Such as in single driving or a plurality of driving, with a conductive bar detection signal value, or with two conductive bars measurement differences, and or It is to measure double difference value with three conductive bars.Wherein difference is the difference of the signal of two adjacent conductive bars, and double difference value is three In adjacent conductive item, the difference of the signal of preceding two conductive bars subtracts each other the difference that the difference of the signal of rear two conductive bars generates.
Accordingly, it is a kind of signal measurement method of touch screen, as shown in figure 11 in another example of the present invention.Such as step Shown in rapid 1110, touch screen is provided, touch screen includes a plurality of driving conductive bar arranged in parallel and a plurality of detecting arranged in parallel The a plurality of conductive bar of conductive bar composition, the driving conductive bar overlap on multiple crossover regions with the detecting conductive bar.This Outside, as seen at step 1120, each is overlapped with each or each group of driving conductive bar and respectively or each group of detecting is conductive Item is combined as detecting, and as shown in step 1130, determines the delay phase difference of each detecting combination.Later, such as step Shown in 1140, one or one group be sequentially provided in drive signal to the driving conductive bar is provided detecing for drive signal It surveys the driving conductive bar for being provided drive signal in combination and overlapping detecting conductive bar generates mutual capacitive couplings.Next, As indicated in step 1150, when each drive signal is provided, the signal for being provided each detecting combination of drive signal is to prolong It is just measured after slow corresponding phase difference.
Accordingly, the present invention a kind of signal measurement apparatus in, step 1140 can be by driving circuit 41 above-mentioned Implement, and step 1150 can be implemented by circuit for detecting 42 above-mentioned.
In an example of the invention, step 1130 can include：It sequentially selects one of the detecting combination and is used as quilt Detecting combination is selected, can be implemented by driving circuit 41 above-mentioned；And it is chosen by being picked out in multiple predetermined phase differences The delay phase difference of choosing detecting combination postpones the delay wherein when drive signal is provided to and is selected detecting combination The signal measured after phase difference is more than the signal for postponing to be detected after other predetermined phase differences, can be by circuit for detecting above-mentioned 42 implement.
In another example of the present invention, determine that the delay phase difference of each detecting combination can also be reality as described below It applies.One of described detecting combination is selected as benchmark detecting combination, other detecting combinations are combined as non-referenced detecting, and One of described non-referenced detecting combination is sequentially selected as detecting combination is selected, can be by aforementioned driving circuit 41 real It applies.In addition, the delay phase difference by picking out benchmark detecting combination in multiple predetermined phase differences, wherein being provided in drive signal It is detected to benchmark when combining, postpones to detect after the signal detected after the delay phase difference is more than delay other predetermined phase differences The signal arrived, and the signal detected after the delay phase difference described in combinatorial delays is detected as reference signal using benchmark.In addition, It is selected the delay phase difference of detecting combination by being picked out in multiple predetermined phase differences, is chosen wherein being provided in drive signal When choosing detecting combination, postpone to detect after the signal detected after the delay phase difference is poor compared to delay other predetermined phases Signal closest to reference signal.More than, can be implemented by circuit for detecting 42 above-mentioned.
In the second embodiment of the present invention, signal is measured by control circuit, and the signal of each group of detecting conductive bar is It is measured again after variable resistance respectively, control circuit is that the resistance of variable resistance is determined according to each group of driving conductive bar It is anti-.For example, one group that first selects the driving conductive bar is used as benchmark conductive bar, other conductive bars to be known as non-referenced conductive bar. Multiple default impedances are set first, and detect one when benchmark conductive bar (may be one or more) is provided drive signal Item detects the signal of conductive bar, or detecting is a plurality of or all detects the totalling of the signal of conductive bar, as flat calibration signal.In addition, Flat calibration signal can fall within default working range, not necessarily need to be best or peak signal.In other words, any to make flat standard Signal fall within default working range default impedance all can serve as benchmark conductive bar put down quasi- impedance.Next non-at each group When benchmark conductive bar is provided drive signal value, impedance adjustment variable resistance is preset according to each respectively, and detect this The signal of conductive bar is detected, or detects the totalling of a plurality of or all detecting conductive bars the signal, flat standard is most tapped into compare The default impedance of signal puts down quasi- impedance as relative to the non-referenced conductive bar of the group for being provided drive signal.In this way, can sentence Break and the flat quasi- impedance of each group of driving conductive bar, variable resistance is adjusted according to the flat quasi- impedance of each group of driving conductive bar Impedance (adjustment variable resistance to flat quasi- impedance), can be obtained and relatively put down accurate image, i.e. difference very little between signal in image.
It is to put down quasi- impedance using identical with all detecting conductive bars when each drive signal is provided in preceding description, The art have usual knowledge technical staff it can be deduced that can also be when each drive signal is provided, it is each Group detecting conductive bar, which uses, is respectively adopted respective flat quasi- impedance.In other words, be when each drive signal is provided, it is right respectively Each default impedance of each group of detecting conductive bar carries out the measurement of signal, to judge that the prediction for most approaching flat calibration signal hinders It is anti-, obtain the flat quasi- impedance of each detecting conductive bar when each group of driving conductive bar is provided drive signal respectively accordingly, with Adjust separately the impedance of the variable resistance of electrical couplings each detecting conductive bar.
Control circuit above-mentioned can also be and be formed by one or more IC other than it can be made of electronic component.? In one example of the present invention, variable resistance can be built into IC, can by programmable program (firmware in such as IC, Firmware) impedance of variable resistance is controlled.Such as variable resistance is made of multiple resistance, and by multiple switch control System, opening and closing (on and off) and adjust the impedance of variable resistance by different switches, due to variable resistance with it is programmable Program is known technology, and details are not described herein.Variable resistance in IC can be modified via firmware with programmable program control Mode is suitable for the touch panel of different characteristics, can be effectively reduced cost, achieve the purpose that commercial production.
In the third embodiment of the present invention, signal is measured by control circuit, and the signal of each group of detecting conductive bar is Pass through circuit for detecting (such as integrator) respectively to measure, control circuit is to determine detecting electricity according to each group of driving conductive bar The enlargement ratio on road.For example, one group that first selects the driving conductive bar is used as benchmark conductive bar, other conductive bars to be known as non-base Quasi- conductive bar.Multiple default enlargement ratios are set first, and are provided drive in benchmark conductive bar (may be one or more) The signal of a detecting conductive bar is detected when dynamic signal, or detecting is a plurality of or all detects the totalling of the signal of conductive bar, as Flat calibration signal.In addition, flat calibration signal can fall within default working range, best or peak signal is not necessarily needed to be.Change speech It, the flat standard that any default enlargement ratio for making flat calibration signal fall within default working range all can serve as benchmark conductive bar is put Big multiplying power.Next when each group of non-referenced conductive bar is provided drive signal value, times magnification is preset according to each respectively Rate adjusts circuit for detecting, and detects the signal of this detecting conductive bar, or detects a plurality of or all detecting conductive bars the letter Number totalling, to compare the default enlargement ratio for most tapping into flat calibration signal, as relative to the group for being provided drive signal Non-referenced conductive bar puts down quasi- enlargement ratio.In this way, the flat quasi- enlargement ratio of each group of driving conductive bar is can determine whether out, according to every One group of driving conductive bar puts down quasi- enlargement ratio to adjust the enlargement ratio of circuit for detecting, can be obtained and relatively puts down accurate image, i.e. shadow The difference very little between signal as in.
When each drive signal is provided, amplified using identical flat standard with all detecting conductive bars in preceding description Multiplying power, the art have usual knowledge technical staff it can be deduced that can also be when each drive signal is provided, Each group of detecting conductive bar, which uses, is respectively adopted respective flat quasi- enlargement ratio.In other words, it is to be provided in each drive signal When, the measurement of signal is carried out to each default enlargement ratio of each group of detecting conductive bar respectively, to judge the flat standard of most approach It is conductive to obtain each detecting when each group of driving conductive bar is provided drive signal respectively accordingly for the scale-up multiplying power of signal Item puts down quasi- enlargement ratio.
In the fourth embodiment of the present invention, signal is measured by control circuit, and the signal of each group of detecting conductive bar is Pass through circuit for detecting (such as integrator) respectively to measure, control circuit is to determine detecting electricity according to each group of driving conductive bar The time of measuring on road.For example, one group that first selects the driving conductive bar is used as benchmark conductive bar, other conductive bars to be known as non-base Quasi- conductive bar.Multiple preset measuring times are set first, and are provided drive in benchmark conductive bar (may be one or more) The signal of a detecting conductive bar is detected when dynamic signal, or detecting is a plurality of or all detects the totalling of the signal of conductive bar, as Flat calibration signal.In addition, flat calibration signal can fall within default working range, best or peak signal is not necessarily needed to be.Change speech It, any preset measuring time for making flat calibration signal fall within default working range all can serve as the flat quasi- survey of benchmark conductive bar Measure the time.Next when each group of non-referenced conductive bar is provided drive signal value, when presetting measurement according to each respectively Between adjust circuit for detecting, and detect the signal of this detecting conductive bar, or detect a plurality of or all detecting conductive bars the letters Number totalling, to compare the preset measuring time for most tapping into flat calibration signal, as relative to the group for being provided drive signal The flat locating tab assembly time of non-referenced conductive bar.In this way, the flat locating tab assembly time of each group of driving conductive bar is can determine whether out, according to every The flat locating tab assembly time of one group of driving conductive bar adjusts the time of measuring of circuit for detecting, can be obtained and relatively puts down accurate image, i.e. shadow The difference very little between signal as in.
It is to use identical flat locating tab assembly with all detecting conductive bars when each drive signal is provided in preceding description Time, the art have usual knowledge technical staff it can be deduced that can also be when each drive signal is provided, Each group of detecting conductive bar, which uses, is respectively adopted the respective flat locating tab assembly time.In other words, it is to be provided in each drive signal When, the measurement of signal is carried out to each preset measuring time of each group of detecting conductive bar respectively, to judge the flat standard of most approach It is conductive to obtain each detecting when each group of driving conductive bar is provided drive signal respectively accordingly for the prediction time of measuring of signal The flat locating tab assembly time of item.
In the foregoing description, one can be selected by first embodiment, second embodiment, 3rd embodiment and fourth embodiment Kind selects a variety of mixing implementations, and the present invention is not limited thereto.Can select away from detecing in addition, when measuring flat calibration signal One or more farthest detecting conductive bar of slowdown monitoring circuit carries out the detecting of signal, to generate flat calibration signal.For example, it may be with The signal of a farthest detecting conductive bar produces to generate the differential wave of flat calibration signal or farthest two detecting conductive bars Life calibration signal (difference), can also be in farthest three detecting conductive bars first two with the differential letters of rear two detecting conductive bars Number difference generate flat calibration signal (double difference value).In other words, flat calibration signal can be signal value, difference or double difference value, can also It is the value of other signal generations for detecting conductive bar according to one or more.
Figure 12 is please referred to, for a kind of signal measurement method of touch screen according to the present invention.As shown in step 1210, carry Screen for touch, touch screen include the more of a plurality of driving conductive bar and a plurality of detecting conductive bar arranged in parallel composition arranged in parallel Conductive bar, the driving conductive bar overlap on multiple crossover regions with the detecting conductive bar.In addition, as step 1220 institute Show, one that selects the driving conductive bar or one group of driving conductive bar are used as benchmark conductive bar, other or other group drive Moving conductive item is as non-referenced conductive bar.Benchmark conductive bar can also be other with first or first group of driving conductive bar The driving conductive bar of position, the present invention is not limited thereto.Next, as shown in step 1230, drive signal is provided to benchmark Conductive bar, and detect the signal of the described at least one detecting conductive bar according to one of described parameter group.Also, such as step Shown in 1240, when the signal of at least one detecting conductive bar is not within the scope of preset signals, sequentially join according to other One of array detects the signal of the described at least one detecting conductive bar, until the letter of at least one detecting conductive bar It number falls within the scope of preset signals.In addition, as shown in step 1250, when being provided drive signal with benchmark conductive bar described in extremely A few detecting conductive bar falls within the signal within the scope of preset signals as flat calibration signal, and with the ginseng of benchmark conductive bar foundation Initial parameter group of the array as benchmark conductive bar.Next, as shown in step 1260, be sequentially provided respectively drive signal to Each or each group of non-referenced conductive bar, also, as shown in step 1270, in each or each group of non-referenced conductive bar quilt When drive signal is provided, the letter of at least one detecting conductive bar is sequentially detected according to the parameter group one respectively Number.Later, it as shown in step 1280, determines in each or the initial parameter group of each group of non-referenced conductive bar, wherein distinguishing It is provided drive signal value in each or each group of non-referenced conductive bar, described according to initial parameter group detecting at least one The signal for detecting conductive bar is closest compared to the signal of at least one detecting conductive bar described according to the detecting of other parameters group Flat calibration signal.
According to previously described first, second, third and fourth embodiment, parameter group can be for changing delay phase Difference, the time of measuring of the resistance value of variable resistance, the enlargement ratio of circuit for detecting and circuit for detecting.In the first example of the present invention In, drive signal be via variable resistance to the described at least one detecting conductive bar, the resistance value of wherein variable resistance be according to Change according to the initial parameter for the conductive bar for being provided drive signal.In the second example of the present invention, the time of detection signal It is to change according to the initial parameter for the conductive bar for being provided drive signal.In the third example of the present invention, drive signal is It is supplied to described at least one to detect conductive bar after amplifying via amplifier, the multiplying power of wherein amplifying circuit amplification is according to quilt The initial parameter of the conductive bar of drive signal is provided to change.In addition, in the 4th example of the present invention, described at least one The signal of detecting conductive bar is just to start to detect after postponing phase difference, wherein delay phase difference, which is foundation, is provided driving letter Number the initial parameter of conductive bar change.
Accordingly, Fig. 4 is please referred to, a kind of signal measurement of touch screen according to the present invention includes：Touch screen, driving circuit 41, circuit for detecting 42 and control circuit 45.Touch screen include a plurality of driving conductive bar 151 arranged in parallel with it is arranged in parallel more Item detects a plurality of conductive bar that conductive bar 152 forms, and the driving conductive bar 151 and the detecting conductive bar 152 are overlapping In multiple crossover regions.Driving circuit 41 provides drive signal to one or one group of driving conductive bar 151, wherein the driving is led Conductive bar on the basis of one of electric item 151 or one group of driving conductive bar 151, and other or other group driving conductive bar 151 For non-referenced conductive bar.Circuit for detecting 42 is when each drive signal is provided, according to one of multigroup parameter group by least one The signal of detecting conductive bar 152 generates the assessment signal for the driving conductive bar 151 for being provided drive signal.Control circuit 45, by The parameter group selects one group of initial parameter group as benchmark conductive bar, to be generated by circuit for detecting according to initial parameter group Assessment signal select each or each group of non-referenced conductive bar respectively as flat calibration signal, and by the parameter group The assessment signal that initial parameter group, each of which or each group of non-referenced conductive bar are generated according to initial parameter group compared to according to The assessment signal generated according to other parameters group is closest to flat calibration signal.In addition, the parameter group can be previously stored storage electricity Road 43.
Assessment signal can be the signal generation for detecting conductive bar according to one or more.For example, assessment signal is by institute One of detecting conductive bar stated generates.In another example assessment signal is added by least two signals of the detecting conductive bar It is total to generate.
In addition, in one example of the present invention, controller can be sequentially according to one of described parameter group respectively by detecing Slowdown monitoring circuit generates the assessment signal of benchmark conductive bar, and with based on the assessment signal of the maximum benchmark conductive bar of generation Initial parameter group of the parameter group as benchmark conductive bar.In another example of the present invention, controller can be sequentially according to institute One of parameter group stated is generated the assessment signal of benchmark conductive bar by circuit for detecting respectively, and with first qualified base Initial parameter group of the parameter group as benchmark conductive bar based on the assessment signal of quasi- conductive bar.
According to previously described first, second, third and fourth embodiment, parameter group can be for changing delay phase Difference, the time of measuring of the resistance value of variable resistance, the enlargement ratio of circuit for detecting and circuit for detecting.In the first example of the present invention In, drive signal is via variable resistance at least one detecting conductive bar, and wherein circuit for detecting is that foundation is provided The initial parameter of the conductive bar of drive signal changes the resistance value of variable resistance.In the second example of the present invention, circuit for detecting It is to change the time of detection signal according to the initial parameter for the conductive bar for being provided drive signal.In the third example of the present invention In, drive signal is to be supplied to described at least one to detect conductive bar after amplifying via amplifier, wherein circuit for detecting be according to Change the multiplying power of amplifying circuit amplification according to the initial parameter for the conductive bar for being provided drive signal.In addition, the of the present invention In four examples, circuit for detecting is the signal for just starting to measure at least one detecting conductive bar after postponing phase difference, Wherein circuit for detecting is the initial parameter for the conductive bar that foundation is provided drive signal to change delay phase difference.
3 are please referred to Fig.1, for according to the touch-control system 1300 of one embodiment of the invention.The touch-control system 1300 includes to touch Control screen or touch panel 1310 and the arrangement for detecting 1320 for being connected to the touch control screen 1310.The touch control screen includes a plurality of Drive conductive bar 1311 and a plurality of detecting conductive bar 1312.The arrangement for detecting 1320 includes at least one driving circuit 1330, extremely A few circuit for detecting 1340 and control module 1350.The driving circuit 1330 is for being connected to the driving conductive bar 1311.It should Circuit for detecting 1340 is for being connected to the detecting conductive bar 1312.
The driving circuit 1330 is for providing drive signal to one of the touch control screen 1310 or one group of driving conductive bar 1311.One or one group of driving conductive bar 1311 are designated as benchmark conductive bar.Remaining driving conductive bar 1311 is designated as Non-referenced conductive bar.It is corresponding according to 1311 institute of driving conductive bar for being provided drive signal when providing the drive signal every time Multiple parameters set a parameter, the circuit for detecting 1340 be used for from least one detecting conductive bar 1312 generate assessment letter Number.The control module 1350 for selected from multiple parameter sets of the benchmark conductive bar one group of parameter sets as Then the circuit for detecting 1340 is appointed as putting down by initial parameter set according to the assessment signal caused by the initial parameter set Calibration signal (level signal).Each or the initial parameter of each group of non-referenced conductive bar are worked as by multiple parameter sets In select.It is compared with other assessment signals caused by the parameter according to other parameters set, it is non-according to each or each group Assessment signal caused by the initial parameter of benchmark conductive bar is closest to the flat calibration signal.
In one embodiment, which controls the circuit for detecting 1340 and is used for sequentially according to the parameter sets Each parameter generates the assessment signal of the benchmark conductive bar, wherein generating the parameter set of the maximum assessment signal of the benchmark conductive bar Close the initial parameter set for being designated as the benchmark conductive bar.
In one embodiment, which comes from one of a plurality of detecting conductive bar 1312.Another In embodiment, which comes from least two in a plurality of detecting conductive bar 1312 signal summations.
In one embodiment, the circuit for detecting 1340 is corresponding just according to the driving conductive bar 1311 for sending out drive signal Beginning parameter changes detecting time span.
In one embodiment, which is that at least one driving conductive bar is supplied to after amplifying via signal amplifier 1311.The driving circuit 1330 changes the signal according to the 1311 corresponding initial parameter of driving conductive bar for sending out drive signal The amplification factor of amplifier.
In one embodiment, which is that at least one detecting conductive bar is measured after postponing phase difference 1312 signal.The circuit for detecting 1340 changes according to the 1311 corresponding initial parameter of driving conductive bar for sending out drive signal Become the delay phase difference.
4 are please referred to Fig.1, for according to the flow diagram of the touch detection method of one embodiment of the invention.The flow is shown It is intended to 1320 implementation of arrangement for detecting that can be as shown in Figure 13.The flow chart can comprise the steps of：
Step 1410：One of specified touch control screen or one group of driving conductive bar are used as benchmark conductive bar, it is specified other Or other group driving conductive bars are as non-referenced conductive bar.
Step 1420：Drive signal is provided to the benchmark conductive bar, according to a pair of multiple parameters set touch control screen At least one detecting conductive bar measuring signal.
Step 1430：Letter sequentially is measured at least one detecting conductive bar according to the other parameters of multiple parameter sets Number, until the measuring signal of at least one detecting conductive bar is fallen within preset signals section.
Step 1440：Being somebody's turn to do within the preset signals section is fallen within by what is obtained measured by at least one detecting conductive bar Measuring signal is appointed as flat calibration signal, and when the drive signal is supplied to the benchmark conductive bar, the corresponding parameter of institute Set is set as initial parameter set.
Step 1450：The drive signal is sequentially provided to each or each group of non-referenced conductive bar.
Step 1460：When the drive signal is sequentially provided to each or each group of non-referenced conductive bar, according to this Each parameter sets of parameter sets measure the signal of at least one detecting conductive bar.
Step 1470：Each or the initial parameter set of each group of non-referenced conductive bar are determined, wherein when the driving When signal is individually provided to each or each group of non-referenced conductive bar, according to the initial parameter set from this at least one Obtained signal measured by item detecting conductive bar than according to other parameters set measured by at least one detecting conductive bar Obtained signal is closer to the flat calibration signal.
In one embodiment, the drive signal is by variable resistance to reach at least one detecting conductive bar, and wherein this can The impedance for becoming resistance be when being provided according to the drive signal the corresponding initial parameter of institute and change.
In one embodiment, the time span detected, which is that institute is initial accordingly when being provided according to the drive signal, joins It counts and changes.
In one embodiment, which is to be supplied at least one driving conductive after amplifying via signal amplifier Item, the amplification factor of the wherein signal amplifier be when being provided according to the drive signal the corresponding initial parameter of institute and change.
In one embodiment, which is the letter that at least one detecting conductive bar is measured after postponing phase difference Number, institute corresponding initial parameter changes the delay phase difference when wherein the circuit for detecting is provided according to the drive signal.
The above described is only a preferred embodiment of the present invention, limitation in any form not is done to the present invention, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, according to the technical essence of the invention Any simple modification, equivalent change and modification made to the above embodiment, in the range of still falling within technical solution of the present invention.

Claims (15)

1. a kind of arrangement for detecting of touch control screen, it is characterised in that include：
Driving circuit, for providing drive signal to one of the touch control screen or one group of driving conductive bar, wherein have one or One group of driving conductive bar is designated as one or one group of benchmark conductive bar, remaining driving conductive bar is designated as non-referenced Conductive bar；
Circuit for detecting, for according to one of multiple parameters set parameter sets, measuring at least one of the touch control screen Detecting conductive bar corresponds to the assessment signal for the driving conductive bar for being provided the drive signal, the wherein drive signal to generate It is to be provided to the driving conductive bar according to the parameter sets；And
Control module, for select one of multiple parameter sets as the benchmark conductive bar initial parameter set with The assessment signal is generated, wherein the circuit for detecting is designated as flat definite message or answer according to assessment signal caused by the initial parameter set Number, wherein the initial parameter set corresponding to each or each group of non-referenced conductive bar is to be selected from multiple parameter set It closes, wherein compared with assessment signal caused by other parameters set, according to each or each group of non-referenced conductive bar phase Assessment signal caused by the initial parameter set answered is the parameter sets near the flat calibration signal.
2. arrangement for detecting according to claim 1, it is characterised in that：Wherein the control module is for controlling the circuit for detecting The assessment signal sequentially is generated according to each parameter sets in multiple parameter sets, wherein for generating benchmark conduction The parameter sets of the maximum are designated as the corresponding initial parameter set of the benchmark conductive bar in the assessment signal of item.
3. arrangement for detecting according to claim 1, it is characterised in that：Wherein the control module is for controlling the circuit for detecting The assessment signal sequentially is generated according to each parameter sets in multiple parameter sets, wherein for generating benchmark conduction The parameter sets of person eligible first are designated as the corresponding initial ginseng of the benchmark conductive bar in the assessment signal of item Manifold is closed.
4. arrangement for detecting according to claim 1, it is characterised in that：Wherein the assessment signal is that the detecting is led via one Signal measured by electric item.
5. arrangement for detecting according to claim 1, it is characterised in that：Wherein the assessment signal be via at least two this detect Survey the signal summation measured by conductive bar.
6. arrangement for detecting according to claim 1, it is characterised in that：Wherein the drive signal is by variable resistance to arrive Up at least one detecting conductive bar, the impedance of the wherein variable resistance is that this is initial accordingly when being provided according to the drive signal Initial parameter in parameter sets and change.
7. arrangement for detecting according to claim 1, it is characterised in that：Wherein the circuit for detecting is according to the drive signal quilt Initial parameter when offer in the corresponding initial parameter set and change detecting time span.
8. arrangement for detecting according to claim 1, it is characterised in that：Wherein the drive signal amplifies via signal amplifier After be supplied to the driving conductive bar, the amplification factor of the wherein signal amplifier to be corresponding when being provided according to the drive signal The initial parameter of initial parameter set and change.
9. arrangement for detecting according to claim 1, it is characterised in that：Wherein the circuit for detecting is after postponing phase difference The signal of at least one detecting conductive bar is measured, this is first accordingly when wherein the circuit for detecting is provided according to the drive signal The initial parameter of beginning parameter sets changes the delay phase difference.
10. the method for detecting of touch control screen, it is characterised in that include：
It specifies one of the touch control screen or one group of driving conductive bar is one or one group of benchmark conductive bar, specify remaining drive Moving conductive item is non-referenced conductive bar；
Drive signal is provided to the benchmark conductive bar of the touch control screen；
Sequentially at least one detecting conductive bar of the touch control screen is carried out according to each parameter sets of multiple parameters set It measures, until the result of measurement is fallen in preset range of signal；
The measuring signal fallen in the preset range of signal is appointed as flat calibration signal, and will correspond to the flat calibration signal The parameter sets be appointed as the initial parameter set of the benchmark conductive bar；
The drive signal is sequentially provided to each or each group of non-referenced conductive bar；
Sequentially at least one detecting conductive bar of the touch control screen is carried out according to each parameter sets of multiple parameters set It measures；And
Each or the initial parameter set of each group of non-referenced conductive bar are determined, wherein when the drive signal individually carries Each is supplied or when each group of non-referenced conductive bar, according to the initial parameter set from at least one detecting conductive bar institute Obtained signal than according to other parameters set from at least one obtained signal of detecting conductive bar closer to the flat standard Signal.
11. method for detecting according to claim 10, it is characterised in that：Wherein the drive signal by variable resistance to arrive Up at least one detecting conductive bar, the impedance of the wherein variable resistance is that this is first accordingly when being provided according to the drive signal Initial parameter in beginning parameter sets and change.
12. method for detecting according to claim 10, it is characterised in that：Wherein detecting time span is believed according to the driving Initial parameter when number being provided in the corresponding initial parameter set and change.
13. method for detecting according to claim 10, it is characterised in that：Wherein the drive signal is put via signal amplifier It is to be provided when institute's phase according to the drive signal that the driving conductive bar, the amplification factor of the wherein signal amplifier are supplied to after big The initial parameter for the initial parameter set answered and change.
14. method for detecting according to claim 10, it is characterised in that：The wherein signal of at least one detecting conductive bar It is to be measured after postponing phase difference, wherein the delay phase difference is that corresponding this is initial for institute when being provided according to the drive signal The initial parameter of parameter sets and change.
15. a kind of touch-control system, it is characterised in that：Including the touch control screen such as any one of claim 1-9 is filled with the detecting It sets.
CN201810395274.3A 2017-05-01 2018-04-27 The arrangement for detecting of touch control screen and method and touch-control system Pending CN108803950A (en)

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