CN108964649A - Electrostatic capacitance switch unit - Google Patents
Electrostatic capacitance switch unit Download PDFInfo
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- CN108964649A CN108964649A CN201710357459.0A CN201710357459A CN108964649A CN 108964649 A CN108964649 A CN 108964649A CN 201710357459 A CN201710357459 A CN 201710357459A CN 108964649 A CN108964649 A CN 108964649A
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- 238000012790 confirmation Methods 0.000 claims abstract description 10
- 238000012545 processing Methods 0.000 claims description 55
- 238000012795 verification Methods 0.000 claims description 45
- 238000005259 measurement Methods 0.000 claims description 32
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000004458 analytical method Methods 0.000 claims description 18
- 238000012423 maintenance Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 9
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 8
- 230000036410 touch Effects 0.000 claims 60
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/9607—Capacitive touch switches
- H03K2217/960735—Capacitive touch switches characterised by circuit details
- H03K2217/960745—Capacitive differential; e.g. comparison with reference capacitance
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Abstract
Electrostatic capacitance switch unit.The present invention provides a kind of capacitance-type switch device and its control methods, the capacitance-type switch device includes: touch-sensing unit (100) comprising the sensing electrode (110) and transmission electrode (120) being arranged on substrate (2)；And contact control module (200), it is arranged on substrate (2), and it is configured as the contact operation state based on the sensing signal confirmation operator from touch-sensing unit (100) and exports touch output signal, wherein, transmission electrode (120) is in response to the transmission of control signals output transmission signal from contact control module (200), sensing electrode (110) is in response to the sensing control signal detection signal from contact control module (200) for being applied to contact control module (200), and wherein, contact control module (200) enables sensing electrode (110) and transmission electrode (120) according to preset mode.
Description
Technical field
The present invention relates to capacitance-type switch devices, more particularly, are related to a kind of condenser type with simplified configuration and open
Device is closed, allows both smoother operation and compact arragement construction more accurately to detect the contact with human body.
Background technique
The vehicle of such as automobile other than playing the role of mobile tool, need to play can be provided for user it is more stable
With the effect of various types of convenient tools of comfortable driving status.Therefore, vehicle equipped with various amenities, for grasping
Make and control their various types of switches and the device for showing them.
Various switches are centrally located the convenience that driver is improved at the steering wheel of vehicle.According to environment, switch
Complicated physical layout driver may be made to lead to the operation of mistake or his or her eyes are fixed on steering wheel, thus
The risk that safety accident occurs is caused to increase.
For the smoother manipulation and operation of switch, the capacitive touch of the substitution of the conventional mechanical switch as durability difference
The coverage area for touching sensing capacitance-type switch is extending.Capacitance touch method for sensing can be generally divided into self-capacitance type and mutually electricity
Appearance type.The benchmark that the variation of the capacitance variation obtained at sensor electrode, setting and capacitance obtained moves together
It is worth (that is, baseline).When the difference of the capacitance and a reference value (that is, baseline) that obtain at sensor electrode is more than specific threshold,
Determine human body touch.In this case, traditional baseline is not reflected in the value obtained at sensor electrode.When in sensor electrode
When locating the difference of the value obtained and a reference value less than specific threshold, baseline is reflected in the value obtained at sensor electrode.This moment, it senses
Device determines that human body is separated with sensor.
However, due to the abrasion that the expendable parts of such as mechanism and spring are reused according to it, conventional mechanical switch
Lead to the operation of mistake and the reduction in service life, causes the increase of the type and quantity of component, and consume a large amount of working hours.In addition,
In the case where conventional condenser sensor is used as single button, using the single method based on self-capacitance or mutual capacitance.It is in office
In the case of one, conventional mechanical switch is related to what capacitance type sensor was influenced vulnerable to ambient enviroment (for example, temperature and humidity/magnetic field)
Problem.In other words, when such as the ambient enviroment of water, magnetic field and electric field greatly changes suddenly, existing touch algorithm determines people
Body touches, and there is a problem in that: the state that touch algorithm maintains human body to touch, until the environment of suddenly change returns
Until returning its reset condition.
Summary of the invention
Technical problem
Therefore, the present invention is made to solve the above problem occurred in the prior art, and the purpose of the present invention is to provide one
Kind capacitance-type switch device and its control method, allow combination capacitor measurement and a reference value is reflected at sensor electrode and obtains
The signal attenuation state of human body touch occurs to reflect for the capacitance obtained, so that more accurate touch detection can be realized.
Technical solution
To achieve the goals above, in one aspect, the present invention provides a kind of capacitance-type switch device, which is opened
Closing device includes: touch-sensing unit 100 comprising sensing electrode 110 on a substrate 2 and transmission electrode 120 is arranged；And
Contact control module 200, is set on a substrate 2, and is configured as based on the sensing letter from touch-sensing unit 100
Number confirmation operator contact operation state and export touch output signal, wherein transmission electrode 120 in response to from touch control
The transmission of control signals output transmission signal of molding block 200, sensing electrode 110 is in response to the sense from contact control module 200
Observing and controlling signal detection signal is to be used to be applied to contact control module 200, and wherein, contact control module 200 is according to pre-
If mode enables sensing electrode 110 and transmission electrode 120.
In the capacitance-type switch device, sensing electrode 110 and transmission electrode 120 can be respectively set at the two of substrate 2
On a surface.
In the capacitance-type switch device, sensing electrode 110 and transmission electrode 120 may be disposed at the same table of substrate 2
On face.
In the capacitance-type switch device, transmission electrode 120 may be disposed at the outer circumference of sensing electrode 110.
In the capacitance-type switch device, contact control module 200 can include: touch sensor control unit 21, quilt
It is configured to for transmission of control signals to be applied to transmission electrode 120 and sensing control signal is applied to sensing electrode 110, and
Control the enabling of transmission electrode 120 and sensing electrode 110；Signal processing unit 23 is configured as processing 110 institute of sensing electrode
The signal of detection；And signal output unit 25, it is configured as exporting signal handled by signal processing unit 23 to outer
Portion.
In the capacitance-type switch device, touch sensor control unit 21 is executable to be enabled sensing electrode 110 and disables
The self-capacitance measurement pattern of transmission electrode 120.
In the capacitance-type switch device, the executable disabling sensing electrode 110 of touch sensor control unit 21 is simultaneously enabled
The mutual capacitance measurement pattern of transmission electrode 120.
In the capacitance-type switch device, touch sensor control unit 21 is executable to enable sensing electrode 110 and transmission
The combination capacitor measurement pattern of electrode 120.
On the other hand, the present invention provides a kind of method for controlling capacitance-type switch device, this method includes following step
It is rapid: step being provided, provides capacitance-type switch device, which includes touch-sensing unit 100 and touch control
Module 200, touch-sensing unit 100 include sensing electrode 110 and the transmission electrode 120 being arranged on a substrate 2, touch control mould
Block 200 is set on a substrate 2 and is configured as based on the sensing signal confirmation operator's from touch-sensing unit 100
Contact operation state simultaneously exports touch output signal, wherein transmission electrode 120 is in response to the biography from contact control module 200
Defeated control signal output transmission signal, sensing electrode 110 control signal detection in response to the sensing from contact control module 200
To be used to be applied to contact control module 200, and wherein, contact control module 200 is enabled according to preset mode and is sensed signal
Electrode 110 and transmission electrode 120；Detecting step S10, detecting step S10 are able to respond the touch-sensing unit 100
It whether there is the manipulation of the operator in the control signal detection from the contact control module 200；Signal pattern analysis
Step S20, analyze and confirm the sensing signal detected in detecting step S10 and the contact that determines whether there is operator and
Touch operation；A reference value updates step S30, and touching is updated using the sensing signal calculated in signal pattern analytical procedure S20
Touch a reference value of sensing unit 100；And output mode executes step S40, executes based in signal pattern analytical procedure S20
The result of the determination of execution determines whether the output mode exported to output signal.
In the capacitance-type switch apparatus control method, contact control module 200 can include: touch sensor control unit
21, it is configured as transmission of control signals being applied to transmission electrode 120 and sensing control signal is applied to sensing electrode
110, and control the enabling of transmission electrode 120 and sensing electrode 110；Signal processing unit 23 is configured as processing sensing
The signal detected of electrode 110；And signal output unit 25, it is configured as signal handled by signal processing unit 23
It exports to outside.Detecting step S20 may include one or more in step S11, step S13 and step S15, step S11
Detection enables sensing electrode 110 and disables the self-capacitance measurement pattern of transmission electrode 120, step S13 detection disabling sensing electrode
110 and the mutual capacitance measurement pattern of transmission electrode 120 is enabled, step S15 detection enables sensing electrode 110 and transmission electrode 120
Combination capacitor measurement pattern, the self-capacitance measurement pattern, mutual capacitance measurement pattern and combination capacitor measurement pattern are by touching
Sensor control unit 21 executes.
In the capacitance-type switch apparatus control method, signal pattern analytical procedure S20 can include: human body touch confirmation step
Suddenly (S20a, S21 and S211) is determined and is confirmed whether the body of operator touches with touch-sensing unit 100；It is true to touch manipulation
Recognize step (S23, S231, S233, S235, S237 and S239), is based on whether depositing in human body touch verification step (S21 and S211)
The result of the determination of human body touch come determine human body touch state whether continue, with confirm operator touch manipulation be intended to；
And idle state control verification step (S25 and S251), meaning is manipulated based on the touch for touching operator in manipulation verification step
The result of the confirmation of figure controls the idle state of touch-sensing unit 100.
In the capacitance-type switch apparatus control method, contact control module 200 may also include storage unit 30, the storage
Unit 30 is configured as the preset data that storage includes initial value, and human body touch verification step (S20a, S21 and S211) is wrapped
Include: whether difference capacitor verification step S20a, confirmation touch-sensing unit 100 are in idle condition (idle=to open (ON)), and
And the sensing electrode of touch-sensing unit 100 is confirmed from sensing signal as the difference of actual capacitance value and a reference value
Difference capacitance；Human body touch determines step S21, by institute in difference capacitance and the preset data being stored in storage unit 30
Including default attenuation be compared, to determine whether that there are human body touch under the idle state of touch-sensing unit 100；
And human body touch opens setting procedure S211, if determining that difference capacitance is less than default decline in step S21 in human body touch
Human body touch (HT) state that the body of operator is touched with touch-sensing unit 100 is then determined as out by the negative value of decrement.
In the capacitance-type switch apparatus control method, manipulation verification step (S23, S231, S233, S235, S237 are touched
And S239) it can comprise the following steps that human body touch (HT) state determining step S23, it determines in human body touch verification step
Whether the human body touch state confirmed in (S20a, S21 and S211) is open state；Human body touch maintains to determine step S231, such as
Fruit determines that human body touch state is open state in human body touch verification step (S20a, S21 and S211), it is determined that instruction touches
Whether the sensing signal of the touch condition of sensing unit 100 continues；It touches and maintains counter increment step S233, if in human body
It touches and maintains to determine that determining touch condition is maintained in step S231, then make to touch using the counter 27 of contact control module 200
It touches and counter is maintained to increase；Maintain fiducial time in the past determine step S235, touch maintain counter increment step S233 it
It will touch afterwards and hold time and include being compared maintenance fiducial time (ts) in preset data, and determine to touch and maintain
Whether state maintains predetermined period of time；And touch condition verification step S237, if maintaining past fiducial time true
Determine to determine in step S235 to touch and hold time more than fiducial time (ts) is maintained, then examines the touch of touch-sensing unit 100
Survey state is switched to out, and the idle state of touch-sensing unit 100 is set as out.
In the capacitance-type switch apparatus control method, it may include using from initial set value that a reference value, which updates step S30,
Or previous sensor signal calculate previous difference capacitor and in signal pattern analytical procedure from presently sensed signal calculate
Current difference capacitor calculates and updates a reference value.
In the capacitance-type switch apparatus control method, it may include following step that output mode, which executes step (S40 and S50),
Rapid: touch detection state determining step S40 determines whether touch detection state is open state；And output rate-determining steps S50,
If determining that touch detection state is open state, and touch detection state is switched in touch detection state determining step S40
For off status and controlled to be exported output control signal to outside by signal output unit.
In the capacitance-type switch apparatus control method, output rate-determining steps S50 can comprise the following steps that signal output step
Rapid S511, if determining that touch detection state is open state in touch detection state determining step S40, by touch detection shape
State is switched to off status and is controlled will be used to be applied to signal output unit so that output signal is switched to open state
Output control signal export to outside；Output switches the step S513 that awaits orders, and waits preset time included in preset data；
And output signal closes setting procedure S515, waits more than the preset time if switched in the step S513 that awaits orders in output,
Then the state of output signal is switched to and is closed to interrupt from signal output unit to external signal and export.
Beneficial effect
It is had the advantages that according to the capacitance-type switch device of the embodiments of the present invention constructed above.
For using the single button of two electrodes simultaneously or selectively to measure according to time division way self-capacitance and mutually electricity
Hold.In addition, transmission sensor (that is, TX sensor) is activated to extract by by mutual capacitance and certainly electric when measuring self-capacitance
The combination signal for holding fusion and obtaining, and the waveform change pattern by extracting the signal obtained is analyzed whether to determine human body
It touches, thus faulty operation caused by avoiding due to external environment influence.
In addition, capacitance-type switch device of the invention enables the capacitance obtained at sensor electrode to be set to
Continuously reflected according to the constant cycle by a reference value (that is, baseline), and identify and handle the constant pattern consistently occurred, directly
It is separated to human body with sensor contacts and with sensor, so that external environment influence be made to minimize.
In addition, capacitance-type switch device of the invention includes by PCB, plastic product shell and being filled in filler therein
The basic configuration of composition, thus compared with the complicated machinery switch being made of spring, latch, bar, shell etc., the quantity of component into
And the working hour for being used to assemble opposite can be reduced.
Sensor is designed to be arranged on the PCB inside plastic shell, even if thus due to be used for a long time, component also compared with
Few consumption and abrasion, capacitance-type switch device of the invention can be semi-permanently used, therefore the durability phase compared with mechanical switch
To improvement.
Detailed description of the invention
The above and other objects, features and advantages of the invention by from below in conjunction with attached drawing to preferred implementation side of the invention
Formula carry out detailed description and it is clear that in attached drawing:
Fig. 1 is the schematic block diagram for showing the capacitance-type switch device of embodiment according to the present invention；
Fig. 2 and Fig. 3 is to show the touch-sensing unit of the capacitance-type switch device of embodiment according to the present invention to match
Set the schematic diagram with modification；
Fig. 4 to fig. 6 is to show the touch-sensing unit of the capacitance-type switch device of embodiment according to the present invention to open
With or disabled status configuration diagram；
Fig. 7 be show embodiment according to the present invention as the self-capacitance of capacitance-type switch device, mutual capacitance and
The difference electricity of the difference of a reference value of the signal and reflection signal obtained that are obtained at sensor under combination capacitor measurement pattern
The schematic diagram of capacitance；
Fig. 8 and Fig. 9 is the flow chart for showing the capacitance-type switch apparatus control method of embodiment according to the present invention；With
And
Figure 10 and Figure 11 is the capacitance-type switch device for showing conventional touch sensor and embodiment according to the present invention
Touch implementation example in sensing signal, a reference value and difference capacitance schematic diagram.
Symbol description
10: capacitance-type switch device
100: touch-sensing unit
200: contact control module
Specific embodiment
Hereinafter, will be described in detail with reference to the accompanying drawings the configuration and operation of capacitance-type switch device of the invention.
The capacitance-type switch device of embodiment according to the present invention includes touch-sensing unit 100 and contact control module
200.Other composition elements are at least partially disposed in shell (not shown), and substrate 2 is arranged in shell.Electrical member
Part is set on a substrate 2.Substrate 2 can be modified in various manners according to design specification, for example formed as printed circuit board,
Flexible base board or insertion injection molding substrate.In this embodiment, the description of the detailed configuration of individual shell, substrate etc. will
It is omitted, will focus on necessary configuration and be described.
Touch-sensing unit 100 includes sensing electrode 110 and the transmission electrode 120 being arranged on a substrate 2.It is arranged in substrate
On sensing electrode 110 and transmission electrode 120 be formed as predetermined conductive electrode.Sensing electrode 110 is for detecting and measuring from electricity
Appearance and mutual capacitance.Transmission electrode (that is, TX electrode) 120 on a substrate 2 is set for measuring mutual capacitance.In other words, transmission electricity
Pole 120 controls letter in response to the sensing of the touch sensor control unit 21 from contact control module 200 (by being described later on)
Number come realize scheduled transmission operate.Transmission electrode 120 forms electric field in response to sensing control signal at sensing electrode 110, and
And instruction is provided by sensing connecing for user and switching device since user changes approaching and contact with caused electrode capacitance
The sensing signal of touching.
The sensing electrode 110 and transmission electrode 120 of touch-sensing unit 100 can take sensing electrode 110 and transmission electrode
120 are separately positioned on the structure on two surfaces of substrate 2.
In other words, as shown in the figure, touch-sensing unit 100 can take sensing electrode 110 and transmission electrode 120 to be distinguished
The structure being formed separately on two surfaces 2a and 2b of substrate 2.By the structure, it can be achieved that touch-sensing list on substrate
The confined compact arrangement of forming region of member.
In addition, touch-sensing unit 100 can take sensing electrode 110 and transmission electrode 120 to be formed in a table of substrate 2
Structure on face (that is, same surface).In addition, as shown in the figure, touch-sensing unit 100 can take sensing electrode 110 and pass
Transmission pole 120 is arranged on the structure on the same surface of substrate and on same layer.In other words, touch-sensing unit 100 can
Take such structure: sensing electrode 110 is arranged on the central portion of substrate 2, and transmission electrode 120 is according to around sensing electricity
The mode of the outer periphery of pole 110 is arranged at the peripheral portion of substrate 2, to increase touch-sensing sensitivity.
Contact control module 200 is set on a substrate 2, and for based on the sensing from touch-sensing unit 100
The contact operation state of signal confirmation operator simultaneously exports touch output signal.In other words, transmission electrode 120 is in response to from touching
The transmission of control signals output transmission signal of control module 200 is touched, sensing electrode 110 is in response to coming from contact control module 200
Sensing control signal detection signal with for being applied to contact control module 200, contact control module 200 is according to preset mode
Enable sensing electrode 110 and transmission electrode 120.
More particularly, contact control module 200 includes touch sensor control unit 21, signal processing unit 23 and letter
Number output unit 25.
Transmission of control signals is applied to transmission electrode 120 by touch sensor control unit 21, and sensing is controlled signal
It is applied to sensing electrode 110.In addition, touch sensor control unit 21 controls opening for transmission electrode 120 and sensing electrode 110
With.The enabling control of touch sensor control unit 21 can establish being individually enabled of sensing electrode 110, the list of transmission electrode 120
The solely enabling of enabling and sensing electrode 110 and transmission electrode 120.
In other words, touch sensor control unit 21 it is executable enable sensing electrode 110 and disable transmission electrode 120 from
Capacitance measurement mode, so that capacitor can be established according to self-capacitance mode, that is, touch detection (referring to fig. 4).
In addition, the executable mutual electricity for disabling sensing electrode 110 and enabling transmission electrode 120 of touch sensor control unit 21
Hold measurement pattern, so that capacitor can be established according to mutual capacitance mode, that is, touch detection (referring to Fig. 5).Touch sensor control
The executable combination capacitor measurement pattern for enabling sensing electrode 110 and transmission electrode 120 of unit 21, so that can be according to self-capacitance
The combination capacitor mode being combined with mutual capacitance establishes capacitor, that is, touch detection (referring to Fig. 6).
Signal processing unit 23 is for handling the signal detected of sensing electrode 110.Signal processing unit 23 receives sensing
Received signal is simultaneously converted to predetermined capacitance value by the signal detected of electrode 110.At this point, capacitance calculated can quilt
It is stored in storage unit 30, or can be calculated by arithmetical unit 40 based on the preset data being stored in storage unit 30
Predetermined difference value capacitance.In addition, signal processing unit 23 analyzes signal pattern using the data calculated from signal detected
And execute the direct contact of determining user or the operation of operation intention etc..
Signal output unit 25 is for exporting signal handled by signal processing unit 23 to outside.It is exported from signal single
The signal of member 25 output to external processing can be transmitted to external control unit outside or external memory unit.In other words, signal is defeated
Unit 25 receives the signal and output control signal of processing from signal processing unit 23 out.When the normal touch operation for executing user
When, signal output unit 25 can export pre- set output signal to external control unit outside.
As described above, contact control module 200 may also include storage unit 30.According to circumstances, in addition to signal processing unit
Except contact control module 200 may also include individual arithmetical unit 40.Storage unit 30 can be stored including the initial of a reference value
Value, default attenuation and maintain the preset data including fiducial time (ts), and can be electrically connected with signal processing unit 23 with
It executes predetermined storage operation or takes out the function of the data wherein stored.If requiring supplementation with letter other than signal processing operations
Number processing unit also needs arithmetic logical operation during the determination of predetermined touch operation, then arithmetic list can in addition be arranged
Member 40.
Hereinafter, the method that description controls capacitance-type switch device 10 with reference to the accompanying drawings.
The method of the control capacitance-type switch device 10 of embodiment according to the present invention includes providing step S1, detection step
Rapid S10, a reference value update step S30 and output mode executes step S40.
In step S1 is provided, capacitance-type switch device 10 is provided.As described above, capacitance-type switch device 10 includes: touching
Touch sensing unit 100 comprising sensing electrode 110 on a substrate 2 and transmission electrode 120 are set；And contact control module
200, it is set on a substrate 2 and is configured as confirming operator based on the sensing signal from touch-sensing unit 100
Contact operation state and export touch output signal.Transmission electrode 120 is in response to the transmission control from contact control module 200
Signal output transmission signal processed, sensing electrode 110 control signal detection signal in response to the sensing from contact control module 200
With for being applied to contact control module 200, contact control module 200 enables sensing electrode 110 and transmission according to preset mode
Electrode 120.
In detecting step S10, touch-sensing unit 100 is in response to the control signal from contact control module 200
Detect whether the manipulation there are operator.As described above, contact control module 200 includes: touch sensor control unit 21,
It is configured as transmission of control signals being applied to transmission electrode 120 and sensing control signal is applied to sensing electrode 110, and
Control the enabling of transmission electrode 120 and sensing electrode 110；Signal processing unit 23 is configured as processing 110 institute of sensing electrode
The signal of detection；And signal output unit 25, it is configured as exporting signal handled by signal processing unit 23 to outer
Portion.Detecting step S10 includes self-capacitance measurement pattern detecting step S11, mutual capacitance measurement pattern detecting step S13 and combination electricity
Hold one or more in measurement pattern detecting step S15.
In self-capacitance measurement pattern detecting step S11, sensing electrode 110 is activated and transmission electrode 120 is disabled,
To measure self-capacitance value by touch-sensing unit 100.In mutual capacitance measurement pattern detecting step S13,110 quilt of sensing electrode
It disables and transmission electrode 120 is activated, to measure mutual capacitance value by touch-sensing unit 100.Mould is measured in combination capacitor
In formula detecting step S15, sensing electrode 110 and transmission electrode 120 are activated to measure combination capacitor value.
According to circumstances, detecting step can configure in various manners according to design specification, such as pass through the predetermined of user
Input selects selectively or alternately to execute, but can be taken through single touch-sensing unit in this embodiment
100 simultaneously or sequentially select the configuration of individual measurement pattern.
Hereafter, the signal processing unit 23 of contact control module 200 executes signal pattern analytical procedure S20.In signal graph
In case analytical procedure S20, the signal processing unit 23 of contact control module 200 is analyzed and confirmed to be detected in detecting step S10
Sensing signal, and determine whether there is the contact and touch operation of operator.
Signal pattern analytical procedure S20 includes human body touch verification step (S20a, S21 and S211), touches manipulation confirmation
Step (S23, S231, S233, S235, S237 and S239) and idle state control verification step (S25 and S251).
It is true in the signal processing unit 23 of human body touch verification step (S20a, S21 and S211), contact control module 200
Determine and confirms whether the body of operator touches with touch-sensing unit 100.More particularly, contact control module 200 also wraps
Storage unit 30 is included, storage unit 30 is configured as the preset data that storage includes initial value.Human body touch verification step
(S20a, S21 and S211) includes that determine that step S21 and human body touch are opened up fixed for difference capacitor verification step S20a, human body touch
Step S211.
In difference capacitor verification step S20a, the signal processing unit 23 of contact control module 200 confirms touch-sensing
Whether unit 100 is in idle condition (idle=to open), and the sensing electrode of touch-sensing unit 100 confirms from sensing signal
Difference capacitance as actual capacitance value and the difference of a reference value.If there is no the value in previous steps, then initial value is used.
A reference value can be formed according to predetermined manner (for example, according to in previous steps capacitance and capacitance present value be averaged
Or form the mode of proportional arithmetic expression formula) follow practical capacitance present value.This is only an example, take reflection and with
With the arithmetic expression or structure that can form a reference value in the range of the method for practical capacitance present value in various manners.
Determined in step S21 in human body touch, the signal processing unit 23 of contact control module 200 by difference capacitance with
Included default attenuation is compared in the preset data being stored in storage unit 30, to determine whether in touch-sensing
There are human body touch under the idle state of unit 100.In other words, as shown in fig. 7, working as meter in the case where human body touch state
When difference (that is, difference capacitance) of actually detected capacitance present value and a reference value, take even if self-capacitance measurement pattern,
Under any of mutual capacitance measurement pattern and combination capacitor measurement pattern, configuration that the capacitance of signal also consistently decays
(range between (A) and (B) of Fig. 7).By using the configuration, it is stored in the preset data in storage unit 30 included
Default attenuation be compared to each other with difference capacitance, to determine whether there is human body touch.
By the processing, if determining the signal processing unit 23 of contact control module 200 in step S21 in human body touch
Determine that difference capacitance is less than the negative of default attenuation, then program carries out to human body touch opening setting procedure S211, at this
Human body touch is opened in setting procedure S211, and signal processing unit 23 determines that the body of operator and touch-sensing unit 100 touch
Human body touch (HT) state be open.
Hereafter, control flow carries out manipulating verification step to touch.Touch manipulation verification step (S23, S231, S233,
S235, S237 and S239) in, the signal processing unit 23 of contact control module 200 is based in human body touch verification step (S21
And S211) in the presence or absence of the definitive result of human body touch determine whether human body touch state continues to confirm the touching of operator
Manipulation is touched to be intended to.
More particularly, touching manipulation verification step (S23, S231, S233, S235, S237 and S239) includes human body touching
Touch (HT) state determining step S23, human body touch maintains to determine step S231, touches maintenance counter increment step S233, dimension
Hold past fiducial time determining step S235 and touch condition verification step S237.
In human body touch (HT) state determining step S23, the signal processing unit 23 of contact control module 200 is determined
Whether the human body touch state confirmed in human body touch verification step (S20a, S21 and S211) is open state.
If the signal processing unit 23 of contact control module 200 determine human body touch verification step (S20a, S21 and
S211 the human body touch state confirmed in) is not open state, then control flow is carried out to step S25.
On the contrary, if contact control module 200 signal processing unit 23 determine human body touch verification step (S20a,
S21 and S211) in confirm human body touch state be open state, then control flow is carried out to step S231.
The signal processing unit 23 of contact control module 200 executes the touch condition for determining instruction touch-sensing unit 100
The whether lasting human body touch of sensing signal maintain to determine step S231.In other words, although confirmed and touch-sensing unit
The touch condition of 100 human body touch state can confirm that user is the direct meaning with installation switching device by touching the time
Figure, which touches touch-sensing unit 100, still only touches unintentionally touch-sensing unit 100.
Counter increment step S233 is maintained for this purpose, executing and touching.If maintaining to determine in step S231 in human body touch
Determine that touch condition is maintained, then control flow is carried out to maintenance counter increment step S233 is touched, and maintains to count in the touch
The signal processing unit 23 that number device increases contact control module 200 in step S233 uses the counter of contact control module 200
27 maintain counter to increase to make to touch.
On the contrary, determining that touch condition is not maintained if maintaining to determine in step S231 in human body touch, control is touched
The signal processing unit 23 of molding block 200 determines that the touch condition of user is released, and human body touch state is switched to pass, and will
It touches and counter is maintained to reset to zero (O), so that executing new clear operation (S239).At this point, control flow is to being walked
Rapid S25.
After making to touch maintenance counter increase using counter 27, control flow carries out to maintenance fiducial time going over
It determines step S235, determines the signal processing unit of contact control module 200 in step S235 in the past in the maintenance fiducial time
23 touch maintain counter increment step S233 after will touch and hold time and maintenance benchmark included in preset data
Time, (ts) was compared, and was determined and touched whether maintenance state has been maintained predetermined period of time.In other words, if touched
Maintenance state be maintained be more than it is default maintain fiducial time (ts), then the signal processing unit 23 of contact control module 200 by this
Kind touches the touch operation for being determined as reflecting the intention of operator, rather than is simply not intended to touch operation.
After maintaining fiducial time to determine that step S235 is completed in the past, control flow is carried out to touch condition verification step
S237 or step S25.If maintaining fiducial time to be determined in step S235 in the past, determining that touch is held time is more than to maintain base
Between punctual (ts), then control flow is carried out to touch condition verification step S237, is touched in touch condition verification step S237
The touch detection state of touch-sensing unit 100 is switched to out by the signal processing unit 23 for touching control module 200, and will touching
The idle state for touching sensing unit 100 is set as out.
In other words, contact control module 200 signal processing unit 23 determine there are the intended touch of user operation and
The touch detection state of touch-sensing unit 100 is switched to out in such a manner: by the operation of touch-sensing unit 100
State is set as idle state "ON" with the reality for forming the idle state for sensing other touch operations to allow subsequent operation
It is existing so that touch maintenance state can be maintained it is defeated to form signal for giving touch operation more than predetermined period of time
Out.
On the other hand, if maintaining fiducial time to determine in step S235 that determining that touch is held time is not above in the past
It maintains fiducial time (ts), then control flow is carried out to step S25, in step S25 at the signal of contact control module 200
Reason unit 23 determines whether the increase state touched is repeated.
Hereafter, idle state control verification step (S25 and S251) is executed.Idle state control verification step (S25 and
S251 in), the signal processing unit 23 of contact control module 200 is based on the touch behaviour of the operator touched in manipulation verification step
The confirmation result of intention is indulged to control the idle state of touch-sensing unit 100.In other words, if human body touch state terminates,
That is, no longer input capacitance value or be not present signal intensity, then contact control module 200 signal processing unit 23 determination does not deposit
In input signal and executes and re-form the idle state forming step S251 of idle state.
After performing this signal pattern analysis processing, signal processing unit 23 is by base calculated in previous steps
Quasi- value is updated to new a reference value (S30).That is, updating in step S30 in a reference value, 23 use of signal processing unit is in signal graph
The sensing signal calculated in case analytical procedure S20 updates a reference value of touch-sensing unit 100.More particularly, a reference value
Updating step S30 includes using included initial set value from the preset data being stored in storage unit 30 or previously sense
Survey the previous difference capacitor and the current difference calculated in signal pattern analytical procedure from presently sensed signal that signal calculates
Capacitor calculates and updates a reference value.
It can be used in previous difference capacitor obtained in previous touch operation and current touch operation by arithmetic processing
Obtained in capacitance obtained in current difference capacitor obtained and previous touch operation and current touch operation
Capacitance follows a reference value of capacitance obtained in current touch operation to calculate.
As described above, the capacitance of signal of the reflection based on presently sensed a reference value can realized with calculating difference capacitor
Calculating structure in the range of the embodiment is carry out various modifications according to design specification.
It includes the determination executed based on executing in signal pattern analytical procedure S20 that output mode, which executes step (S40 and S50),
As a result determine whether the output mode of output signal output.It includes touch detection state that output mode, which executes step (S40 and S50),
Determine step S40 and output rate-determining steps S50.
In touch detection state determining step S40, signal processing unit 23 determines whether touch detection state is out shape
State.In output rate-determining steps S50, if determining that touch detection state is out shape in touch detection state determining step S40
State, then touch detection state is switched to off status and controlled to be incited somebody to action by signal output unit by signal processing unit 23
Output control signal is exported to outside.
In addition, more particularly, output rate-determining steps S50 includes that signal exports step S511, output switches step of awaiting orders
S513 and output signal close setting procedure S515.
If in touch detection state determining step S40 determine touch detection state be open state, control flow into
Row to signal exports step S511, and the signal processing unit 23 of contact control module 200 will in signal output step S511
Touch detection state is switched to off status and is controlled will be used to be applied to signal output unit 25 with by output signal
The output control signal for being switched to open state is exported to outside.
Hereafter, output switches the step S513 that awaits orders and allows to wait preset time included in preset data.Then, if
Switch in the step S513 that awaits orders in output and wait more than preset time, then the state of output signal is switched to close to interrupt from letter
Number output unit is exported to external signal.
The difference calculating of actual capacitance value and a reference value obtained in being operated based on current touch is described with reference to the accompanying drawings
The trend of difference capacitance.In other words, Figure 10 shows schematic diagram, which illustrates the capacitor of the sensing of conventional touch sensor
The sensed characteristic of value/a reference value and difference capacitance, Figure 11 show schematic diagram, which illustrates embodiment party according to the present invention
Capacitance/a reference value of the sensing of the capacitance-type switch device of formula and the sensed characteristic of difference capacitance.In the tradition touching of Figure 10
In the case where touching sensor, show according to the variation of the actual capacitance value of conventional method and the variation of a reference value (referring to Figure 10
(a)) and the difference capacitance that calculates of difference based on the variation (referring to (b) of Figure 10).In the case where conventional method,
If difference capacitance is more than predetermined threshold, this is confirmed as touch condition, on the diagram, grasp for primary practical touch
Make and a moisture content change, touch sensor determination perform touch operation twice.
On the other hand, in the case where embodiment according to the present invention is using a reference value for following actual capacitance value, this
The capacitance-type switch device of invention is held in the case where primary practical touch operation based on the attenuation state determination of difference capacitance
It has gone primary practical touch operation, and has used the direct touch if there is user in the case where a moisture content change
The fact that then form attenuation state (referring to Fig. 7) of capacitance, determines that user does not touch touch-sensing unit, because without shape
It is more than the attenuation state of predetermined value at difference capacitance.As a result, capacitance-type switch device determination of the invention performs one in total
Secondary touch operation.
Above embodiment is only for illustrating example of the invention, and the invention is not limited thereto.It is formed based on sensing signal
Capacitance be actually reflected to the formation of a reference value, the present invention can also be applied to apply various capacitors other than vehicle
The field of formula switch is being taken based on reflection or a reference value of actual capacitance value is followed to determine whether there is the structure of human body touch
In the range of can modify capacitance-type switch device of the invention in various manners.
Industrial applicibility
Although describing the present invention in conjunction with illustrative embodiments shown in the drawings, they are only illustrative, this hairs
It is bright to be not limited to these embodiments.It will be appreciated by the skilled addressee that in the feelings for not departing from the spirit and scope of the present invention
The various equivalent modifications and variation of embodiment can be carried out under condition.Therefore, real technology range of the invention should be by appended power
The technical spirit of sharp claim limits.
Claims (16)
1. a kind of capacitance-type switch device, the capacitance-type switch device include:
Touch-sensing unit (100), the touch-sensing unit (100) include be arranged sensing electrode (110) on substrate (2) and
Transmission electrode (120)；And
Contact control module (200), the contact control module (200) are arranged on substrate (2), and are configured as based on next
The contact operation state of operator is confirmed from the sensing signal of the touch-sensing unit (100) and exports touch output letter
Number,
Wherein, the transmission electrode (120) exports in response to the transmission of control signals from the contact control module (200)
Signal is transmitted, the sensing electrode (110) is detected in response to the sensing control signal from the contact control module (200)
Signal with for being applied to the contact control module (200), and
Wherein, the contact control module (200) enables the sensing electrode (110) and the transmission electrode according to preset mode
(120)。
2. capacitance-type switch device according to claim 1, wherein the sensing electrode (110) and the transmission electrode
(120) it is respectively set on two surfaces of the substrate (2).
3. capacitance-type switch device according to claim 1, wherein the sensing electrode (110) and the transmission electrode
(120) it is arranged on the same surface of the substrate (2).
4. capacitance-type switch device according to claim 3, wherein the transmission electrode (120) is arranged on the sense
Survey the outer circumference of electrode (110).
5. capacitance-type switch device according to claim 1, wherein the contact control module (200) includes:
Touch sensor control unit (21), the touch sensor control unit (21) are configured as the transmission of control signals
It is applied to the transmission electrode (120) and sensing control signal is applied to the sensing electrode (110), and control institute
State the enabling of transmission electrode (120) and the sensing electrode (110)；
Signal processing unit (23), the signal processing unit (23) are configured as handling the sensing electrode (110) detected
Signal；And
Signal output unit (25), which is configured as will be handled by the signal processing unit (23)
Signal is exported to outside.
6. capacitance-type switch device according to claim 5, wherein the touch sensor control unit (21) executes and opens
With the sensing electrode (110) and disable the self-capacitance measurement pattern of the transmission electrode (120).
7. capacitance-type switch device according to claim 5, wherein the touch sensor control unit (21) executes taboo
With the sensing electrode (110) and enable the mutual capacitance measurement pattern of the transmission electrode (120).
8. capacitance-type switch device according to claim 5, wherein the touch sensor control unit (21) executes and opens
With the combination capacitor measurement pattern of the sensing electrode (110) and the transmission electrode (120).
9. a kind of method for controlling capacitance-type switch device, method includes the following steps:
Step is provided, which provides the capacitance-type switch device, and the capacitance-type switch device includes touch-sensing
Unit (100) and contact control module (200), the touch-sensing unit (100) include the sensing electricity being arranged on substrate (2)
Pole (110) and transmission electrode (120), the contact control module (200) are arranged on substrate (2) and are configured as being based on
Sensing signal from the touch-sensing unit (100) is believed to confirm the contact operation state of operator and export touch output
Number, wherein the transmission electrode (120) exports in response to the transmission of control signals from the contact control module (200)
Signal is transmitted, the sensing electrode (110) is detected in response to the sensing control signal from the contact control module (200)
Signal is to be used to be applied to the contact control module (200), and wherein, and the contact control module (200) is according to default
Mode enables the sensing electrode (110) and the transmission electrode (120)；
Detecting step (S10), the detecting step (S10) are able to respond the touch-sensing unit (100) in from described
The control signal of contact control module (200) detects whether that there are the manipulations of the operator；
Signal pattern analytical procedure (S20), the signal pattern analytical procedure (S20) are analyzed and are confirmed in the detecting step
(S10) the middle sensing signal detected and the contact and touch operation that determine whether there is the operator；
A reference value updates step (S30), which updates step (S30) use in the signal pattern analytical procedure (S20)
The sensing signal of middle calculating updates a reference value of the touch-sensing unit (100)；And
Output mode executes step (S40), which executes step (S40) and execute based in the signal pattern analysis step
The result of the determination executed in (S20) suddenly determines whether the output mode exported to output signal.
10. according to the method described in claim 9, wherein, the contact control module (200) includes: touch sensor control
Unit (21), the touch sensor control unit (21) are configured as the transmission of control signals being applied to the transmission electrode
(120) and by the sensing control signal be applied to the sensing electrode (110), and control the transmission electrode (120) and
The enabling of the sensing electrode (110)；Signal processing unit (23), the signal processing unit (23) are configured as handling the sense
Survey electrode (110) signal detected；And signal output unit (25), which is configured as will be described
Signal handled by signal processing unit (23) is exported to outside, and
Wherein, the detecting step (S10) includes one or more in step (S11), step (S13) and step (S15),
Step (S11) detection enables the sensing electrode (110) and disables the self-capacitance measurement mould of the transmission electrode (120)
Formula, step (S13) detection disable the sensing electrode (110) and enable the mutual capacitance measurement of the transmission electrode (120)
Mode, step (S15) detection enable the combination capacitor measurement of the sensing electrode (110) and the transmission electrode (120)
Mode, the self-capacitance measurement pattern, the mutual capacitance measurement pattern and the combination capacitor measurement pattern are by the touch
What sensor control unit (21) executed.
11. according to the method described in claim 10, wherein, the signal pattern analytical procedure (S20) the following steps are included:
Human body touch verification step (S20a, S21 and S211), the human body touch verification step (S20a, S21 and S211) determine
And confirm whether the body of the operator touches with the touch-sensing unit (100)；
Touch manipulation verification step (S23, S231, S233, S235, S237 and S239), touchs manipulate verification step (S23,
S231, S233, S235, S237 and S239) it is based on touching in the human body touch verification step (S21 and S211) with the presence or absence of human body
The result for the determination touched determine human body touch state whether continue, with confirm the operator touch manipulation be intended to；And
Idle state controls verification step (S25 and S251), and idle state control verification step (S25 and S251) is based on institute
The result for the confirmation of touch manipulation intention for touching operator described in manipulation verification step is stated to control the touch-sensing list
The idle state of first (100).
12. according to the method for claim 11, wherein the contact control module (200) further includes storage unit (30),
The storage unit (30) is configured as the preset data that storage includes initial value, and
Wherein, the human body touch verification step (S20a, S21 and S211) the following steps are included:
Difference capacitor verification step (S20a), the difference capacitor verification step (S20a) confirm the touch-sensing unit (100)
Whether it is in idle condition, wherein it is idle=to open, and enable the sensing electrode of the touch-sensing unit (100)
Enough difference capacitances confirmed from the sensing signal as actual capacitance value and the difference of a reference value；
Human body touch determines step (S21) that the human body, which touches, to be determined step (S21) for the difference capacitance and be stored in described
Included default attenuation is compared in the preset data in storage unit (30), to determine in the touch-sensing
It whether there is human body touch under the idle state of unit (100)；And
Human body touch opens setting procedure (S211), if determining difference capacitance described in step (S21) in the human body touch
It is less than the negative value of the default attenuation, then human body touch opens setting procedure (S211) for the body of the operator and institute
The human body touch HT state for stating touch-sensing unit (100) touch is determined as out.
13. according to the method for claim 12, wherein touchs manipulate verification step (S23, S231, S233, S235,
S237 and S239) the following steps are included:
Human body touch HT state determining step (S23), the human body touch HT state determining step (S23) and determine in human body touching
Touch whether the human body touch state confirmed in verification step (S20a, S21 and S211) is open state；
Human body touch maintains to determine step (S231), if in the human body touch verification step (S20a, S21 and S211) really
The fixed human body touch state is open state, then human body touch maintains determining step (S231) to determine and indicates the touch-sensing
Whether the sensing signal of the touch condition of unit (100) continues；
It touches and maintains counter increment step (S233), determine institute in step (S231) if maintaining to determine in the human body touch
It states touch condition to be maintained, then the touch maintains counter increment step (S233) to use the contact control module (200)
Counter (27) maintains counter to increase to make to touch；
Fiducial time is maintained to determine step (S235) in the past, which determines step (S235) in the touch in the past
It maintains to touch when holding time and including the maintenance benchmark in the preset data after counter increment step (S233)
Between ts be compared, and determine touch maintenance state whether maintain predetermined period of time；And
Touch condition verification step (S237), if described in being determined in the maintenance fiducial time in the past determining step (S235)
Touch is held time more than the maintenance fiducial time ts, then the touch condition verification step (S237) is by the touch-sensing list
The touch detection state of first (100) is switched to out, and the idle state of the touch-sensing unit (100) is set as
It opens.
14. according to the method for claim 13, wherein a reference value updates step (S30) the following steps are included: using
From current in the previous difference capacitor and the signal pattern analytical procedure that initial set value or previous sensor signal calculate
Sensing signal calculates and updates a reference value.
15. according to the method for claim 14, wherein it includes following step that the output mode, which executes step (S40 and S50),
It is rapid:
Touch detection state determining step (S40), the touch detection state determining step (S40) determine the touch detection state
It whether is open state；And
It exports rate-determining steps (S50), if determining the touch detection shape in the touch detection state determining step (S40)
State is open state, then the output rate-determining steps (S50) by the touch detection state be switched to off status and control with
Output control signal is exported to outside by the signal output unit.
16. according to the method for claim 15, wherein the output rate-determining steps (S50) the following steps are included:
Signal exports step (S511), if determining the touch detection in the touch detection state determining step (S40)
State is open state, then the touch detection state is switched to off status and controlled by signal output step (S511)
Output signal is switched to the output of open state control signal output will be used to be applied to the signal output unit
To outside；
Output switching is awaited orders step (S513), output switching await orders step (S513) wait it is included in the preset data
Preset time；And
Output signal closes setting procedure (S515), if the output switch await orders wait more than in step (S513) it is described pre-
If the time, then the output signal closes setting procedure (S515) and the state of the output signal is switched to pass to interrupt from the letter
Number output unit is exported to external signal.
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| CN113226851A (en) * | 2018-12-28 | 2021-08-06 | 乐星汽车科技有限公司 | Dynamic lamp unit and control method thereof |
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| CN101672660A (en) * | 2008-04-10 | 2010-03-17 | 爱特梅尔公司 | Capacitive position sensor |
| US20100097346A1 (en) * | 2008-10-17 | 2010-04-22 | Atmel Corporation | Capacitive touch buttons combined with electroluminescent lighting |
| US20160357299A1 (en) * | 2015-06-04 | 2016-12-08 | Synaptics Incorporated | Calibrating charge mismatch in a baseline correction circuit |
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