CN106896955B - Supersonic sensing device and its detection circuit and detection method - Google Patents
Supersonic sensing device and its detection circuit and detection method Download PDFInfo
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- CN106896955B CN106896955B CN201710026234.7A CN201710026234A CN106896955B CN 106896955 B CN106896955 B CN 106896955B CN 201710026234 A CN201710026234 A CN 201710026234A CN 106896955 B CN106896955 B CN 106896955B
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
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Abstract
A kind of supersonic sensing device, including ultrasonic wave emitting mould train, ultrasonic wave receiving module, supersonic sensing device detection circuit and controlled member.Ultrasonic wave emitting mould train is for generating ultrasonic wave.Ultrasonic wave receiving module accordingly generates sensing signal for receiving the ultrasonic wave being reflected back by determinand.Supersonic sensing device detection circuit is electrically connected with ultrasonic wave emitting mould train and ultrasonic wave receiving module simultaneously.Supersonic sensing device detection circuit drives ultrasonic wave emitting mould train to generate ultrasonic wave, receive the sensing signal of ultrasonic wave receiving module output, identify whether current touch operation is effective according to the phase change and amplitude variations of sensing signal and driving signal, and exports touch-sensing signal when touch operation is effective and execute corresponding operation to control controlled member.The present invention also provides a kind of supersonic sensing device detection circuit and a kind of supersonic sensing detection methods.
Description
Technical field
The present invention relates to a kind of supersonic sensing device detection circuits, the ultrasound with supersonic sensing device detection circuit
Wave sensing device and its detection method.
Background technique
With the continuous development of electronic technology, mobile phone, portable computer, personal digital assistant (PDA), plate calculate
The consumer electrical products such as machine, media player are mostly all using touch-control sensing device as input equipment, so that product has
More friendly man-machine interaction mode.Touch-control sensing device is used as that the touch switch of mechanical switch, sensing is replaced to touch behaviour
Work or fingerprint recognition.According to the difference of its touch-control principle, electric resistance touch-control sensing mould group, capacitance touching control sensing mould can be divided into
Group, infrared type touch-control sensing mould group and ultrasonic type touch-control sensing mould group etc..Wherein, ultrasonic type touch module includes ultrasound
Wave emitting mould train, ultrasonic wave receiving module, signal-obtaining unit and signal deteching circuit.Ultrasonic wave emitting mould train is super for generating
Sound wave, ultrasonic wave receiving module receives ultrasonic wave after reflection, and electricity is generated the case where reflecting ultrasonic wave according to receiving
Signal, signal-obtaining unit read the electric signal that ultrasonic wave receiving module generates, and signal deteching circuit is received by detection
The amplitude variations of electric signal are to determine whether touch action.Since reception can be can lead to when water droplet touches supersonic sensing device
The amplitude variations of signal, and then generate and accidentally touch.
Summary of the invention
In view of this, it is necessary to provide a kind of supersonic sensing devices for improving touch-control accuracy.
It there is a need to provide a kind of supersonic sensing device detection circuit for improving recognition accuracy.
It there is a need to provide a kind of ultrasonic unit sensing detection method for improving recognition accuracy.
A kind of supersonic sensing device, including the inspection of ultrasonic wave emitting mould train, ultrasonic wave receiving module, supersonic sensing device
Slowdown monitoring circuit and controlled member.Ultrasonic wave emitting mould train is for generating ultrasonic wave.Ultrasonic wave receiving module is to be measured for receiving
The ultrasonic wave that object is reflected back, and accordingly generate sensing signal.Supersonic sensing device detection circuit emits mould with ultrasonic wave simultaneously
Group and ultrasonic wave receiving module are electrically connected.Supersonic sensing device detection circuit output drive signal is to drive ultrasonic wave to emit
Mould group generates ultrasonic wave, the sensing signal of ultrasonic wave receiving module output is received, according to the phase of sensing signal and driving signal
Whether variation and amplitude variations identification current touch operation are effective, and export touch-sensing signal when touch operation is effective to control
Controlled member processed executes corresponding operation.The phase difference of supersonic sensing device detection circuit detection sensing signal and driving signal
It is worth and generates sensing phase difference value.When the amplitude of sensing signal is identical as the amplitude of driving signal, then it is assumed that touch objects are non-
Approved determinand and touch it is invalid.When the amplitude of sensing signal and the amplitude of driving signal are different, hold in the given time
It is continuous to detect sensing phase difference value, and the absolute value for sensing difference between phase difference value and predetermined phase difference is located at preset range
When interior, then it is assumed that touch objects are approved determinand and touch effective.
A kind of supersonic sensing device detection circuit and ultrasonic wave emitting mould train, ultrasonic wave receiving module and controlled member
It is electrically connected.Supersonic sensing device detection circuit drives ultrasonic wave emitting mould train to generate ultrasonic wave, and receives and connect by ultrasonic wave
Receive the sensing signal of mould group output.Supersonic sensing device detection circuit includes driving mould group, phase-detection mould group, amplitude detection
Mould group and signal processing mould group.Mould group and ultrasonic wave emitting mould train and phase-detection mould group is driven to be electrically connected, for exporting
Driving signal is to ultrasonic wave emitting mould train and phase-detection mould group.Phase-detection mould group and driving mould group and ultrasonic wave receiving module
It is electrically connected, for generating sensing phase difference value according to the phase change of driving signal and sensing signal.Amplitude detection mould group
It is electrically connected with signal processing mould group, gives signal processing mould group for detecting the amplitude of sensing signal and exporting.Signal processing mould
Group judges whether current touch operation is effective according to sensing signal and the amplitude of driving signal and sensing phase difference value, and is touching
Touch-sensing signal is exported when operating effective executes corresponding operation to control controlled member.
A kind of supersonic sensing detection method is in supersonic sensing device.Supersonic sensing device includes receiving driving
Signal is generating the ultrasonic wave emitting mould train of ultrasonic wave, receiving by ultrasonic wave that determinand is reflected back and accordingly generating sensing signal
Ultrasonic wave receiving module, supersonic sensing device detection circuit and controlled member.Supersonic sensing device detection circuit packet
Include phase-detection mould group and amplitude detection mould group.Supersonic sensing detection method includes the following steps:
Receive the driving signal for driving ultrasonic wave emitting mould train and the sensing signal of ultrasonic wave receiving module output；
Whether the amplitude of the amplitude and sensing signal that detect driving signal is equal；
If the amplitude of sensing signal is not equal to the amplitude of driving signal, according to the phase change of driving signal and sensing signal
And export sensing phase difference value；
For exporting the output end of sensing phase difference value in identification phase-detection mould group；
Persistently whether output senses phase difference value to the correspondence output end of phase-detection mould group in the given time；
If the correspondence output end of phase-detection mould group persistently exports sensing phase difference value in the given time, examined by phase
The absolute value for surveying difference between sensing phase difference value and the predetermined phase difference of mould group output is located in preset range, and output touches
Sensing signal executes corresponding operation to control controlled member.
Using above-mentioned supersonic sensing device, when identifying touch operation, detection simultaneously converts the sense generated by ultrasonic wave
Survey the phase and amplitude of signal, and the change between phase and sensing signal phase by detecting driving signal in the given time
Change further improves the touch-control accuracy of supersonic sensing device, reduces other substances pair such as water droplet, grease and metal
The mistake of supersonic sensing device is touched.
Detailed description of the invention
Fig. 1 is the diagrammatic cross-section of the supersonic sensing device of first embodiment.
Fig. 2 is the module diagram of supersonic sensing device detection circuit described in Fig. 1.
Fig. 3 is the equivalent circuit diagram of phase-detection mould group described in Fig. 2.
Fig. 4 is driving signal, sensing signal, the first output signal and the second output signal of first embodiment in Fig. 3
Waveform diagram.
Fig. 5 is driving signal, sensing signal, the first output signal and the second output signal of second embodiment in Fig. 3
Waveform diagram.
Fig. 6 is the diagrammatic cross-section of the supersonic sensing device of second embodiment.
Fig. 7 is a kind of flow chart of supersonic sensing detection method.
Main element symbol description
Supersonic sensing device 100,300
Cover board 10
Ultrasonic wave emitting mould train 20
First conductive layer 21
Second conductive layer 22
First piezoelectric layer 24
First adhesive layer 12
Ultrasonic wave receiving module 30,45
Third conductive layer 31,451
4th conductive layer 32
Second piezoelectric layer 34,454
Second adhesive layer 14
Supersonic sensing device detection circuit 200
Drive mould group 210
Phase-detection mould group 230
First trigger 231
First control terminal D1
First input end IN1
First resetting end Reset1
First output end Q1
Second trigger 232
Second control terminal D2
Second input terminal IN2
Second resetting end Reset2
Second output terminal Q2
Logic comparator 235
Amplitude detection mould group 250
Signal processing mould group 270
Controlled member 500
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Following embodiment described herein, is related to ultrasonic sensor, and the ultrasonic sensor can be that can sense
The supersonic sensing device of single-point type touching can also be the supersonic sensing device that can sense multipoint mode touching.As single-point
The supersonic sensing device of formula includes the touch-control sensitive switch that can be used in replacing mechanical switch, and the sensing device is for exporting
Characterization, which issues touching or has, touches close signal；And the supersonic sensing device as multipoint mode, including ultrasonic wave touch-control sense
Device or biology (such as fingerprint) identification device are surveyed, the sensing device is applied not only to output characterization and issues touching or have touching close
Signal, and can also be further transmitted through to signal analysis obtain touching occur position or obtain determinand the case where.And
The detection circuit that supersonic sensing device is included involved in this paper can include exporting through supersonic sensing device mould group
Signal analyze the property of determinand to further determine whether to accidentally touch the function of generation.
It is illustrated respectively by taking single-point type supersonic sensing device and multipoint mode supersonic sensing device as an example separately below.
Referring to Fig. 1, Fig. 1 is the diagrammatic cross-section for the supersonic sensing device 100 that first embodiment of the invention provides.
The supersonic sensing device 100 is a single-point type supersonic sensing device.
The supersonic sensing device 100 includes cover board 10, ultrasonic wave emitting mould train 20, ultrasonic wave receiving module 30, surpasses
Acoustic wave sensing devices detection circuit 200 and controlled member 500.
The cover board 10 is made of transparent material, for preventing the impurity such as dust from entering inside supersonic sensing device 100.
In the present embodiment, cover board 10 can be glass substrate or other transparent substrates with high intensity, high rigidity, such as poly- carbon
Acid esters (Polycarbonate, PC), polyester (Polythylene terephthalate, PET), polymethyl methacrylate
(Polymethylmethacrylate, PMMA), cyclic olefin copolymer (Cyclic Olefin Copolymer, COC) are poly-
The materials such as ether sulfone (Polyether sulfone, PES) are made.
The ultrasonic wave emitting mould train 20 is bonded in the surface of the cover board 10 by the first adhesive layer 12.The ultrasonic wave
Emitting mould train 20 can be the piezoelectric emitter of generation ultrasonic wave for generating ultrasonic wave.The ultrasonic wave emitting mould train 20 includes
First conductive layer 21, the second conductive layer 22 and be set between first conductive layer 21 and second conductive layer 22
One piezoelectric layer 24.First conductive layer 21 is bonded by first adhesive layer 12 with the cover board 10, and is set to described
First piezoelectric layer 24 is close to the surface of the cover board 10.First conductive layer 21 receives driving signal.Second conductive layer
22 are set to surface of first piezoelectric layer 24 far from the cover board 10.Between first conductive layer 21 and the second conductive layer 22
Voltage difference is formed, to apply voltage to extend or shrink the first piezoelectric layer 24, to generate ultrasonic wave to the first piezoelectric layer 24.
This ultrasonic wave can advance towards determinand, pass through cover board 10, the part for further not absorbed or being emitted by object to be detected can
It is reflected to be passed through cover board 10 and pass back and received by ultrasonic wave receiving module 30.In the present embodiment, described second is conductive
Layer 22 is grounded by lead or pin.First conductive layer 21 and second conductive layer 22 are made of metal material, such as
Silver, the silver such as copper (Ag), copper (Cu), molybdenum (Mo) etc., but not limited to this, also can be other conductive materials.First piezoelectric layer
24 for poly- vinylidene difluoride (PolyvinylideneFluoride, PVDF) material by being made.
The ultrasonic wave receiving module 30 by the second adhesive layer 14 be bonded in the ultrasonic wave emitting mould train 20 with it is described
On the opposite surface of cover board 10.
The ultrasonic wave receiving module 30 is used to receive by ultrasonic wave that determinand is reflected back and is accordingly converted into local electricity
Lotus, and convert electric signal for partial charge coupling and export to the supersonic sensing device detection circuit 200.The electricity
Signal can be transferred to the supersonic sensing device detection circuit 200 via a flexible circuit board or other electric conduction routings.It is described
Ultrasonic wave receiving module 30 includes third conductive layer 31, the 4th conductive layer 32 and the second piezoelectric layer 34.The third conductive layer
It is bonded on second conductive layer 22 surface opposite with the cover board 10 by second adhesive layer 14, and is set to institute
The second piezoelectric layer 34 is stated close to the surface of the cover board 10.The third conductive layer 31 is grounded by lead or pin.Described
The Ultrasonic transformation that two piezoelectric layers 34 receive reflection is partial charge and is converted to electric signal.4th conductive layer 32 is set to
Second piezoelectric layer 34 surface opposite with the cover board 10.4th conductive layer 32 is examined with the supersonic sensing device
Slowdown monitoring circuit 200 is electrically connected, for exporting electric signal as sensing signal to the supersonic sensing device detection circuit
200.4th conductive layer 32 is as a biasing electrode layer for receiving a ground voltage or a bias voltage.In the present embodiment
In, the 4th conductive layer 32 ground connection.In the present embodiment, the third conductive layer 31 and the 4th conductive layer 32 are by gold
Belong to material to be made, such as silver, the silver such as copper (Ag), copper (Cu), molybdenum (Mo) etc., but not limited to this.First piezoelectric layer 24 by
It is made for poly- vinylidene difluoride (PolyvinylideneFluoride, PVDF) material.
It is appreciated that the stratification position relationship of the ultrasonic wave emitting mould train 20 and ultrasonic wave receiving module 30 is interchangeable.
Referring to Figure 2 together, the supersonic sensing device detection circuit 200 and the ultrasonic wave emitting mould train 20 and institute
State the electric connection of ultrasonic wave receiving module 30.The supersonic sensing device detection circuit 200 can compare supersonic sensing dress
The sensing signal of 100 outputs and the amplitude of input drive signal and phase are set, analyzes the property of determinand further to judge
Whether the function that accidentally touches generation is had.Accidentally touching here refers to have triggers ultrasonic wave and passes because non-approved operation object touches
Induction device 100 executes the case where corresponding function.The supersonic sensing device detection circuit 200 is for driving the ultrasonic wave to send out
It penetrates mould group 20 and generates the driving signal of ultrasonic wave, and receive the sensing signal that the ultrasonic wave receiving module 30 exports, according to institute
The amplitude and phase for stating driving signal and the sensing signal judge whether touch operation is effective, and when touch operation is effective
Output touch-sensing signal executes corresponding operation to control the controlled member 500.
The supersonic sensing device detection circuit 200 includes driving mould group 210, phase-detection mould group 230, amplitude detection
Mould group 250 and signal processing mould group 270.
The driving mould group 210 is electrically connected with the ultrasonic wave emitting mould train 20 and the phase-detection mould group 230.Institute
Driving mould group 210 is stated for output drive signal to first conductive layer 21 and the phase-detection mould group 230.In this implementation
In mode, the driving signal can be sine wave, triangular wave or square wave etc., and however, it is not limited to this.
The phase-detection mould group 230 is electrically connected with the driving mould group 210 and the ultrasonic wave receiving module 30.Institute
State driving signal and the ultrasonic wave receiving module 30 that phase-detection mould group 230 is exported for receiving the driving mould group 210
The sensing signal of output handles output sensing phase difference value after above-mentioned signal.Wherein, the sensing phase difference value is for being described
The phase difference value of sensing signal and the driving signal.The phase-detection mould group 230 can also further detect the driving
The phase change behavior of signal and the sensing signal.
Also referring to Fig. 3, the phase-detection mould group 230 includes first voltage source VDD1, the second voltage source VDD2, the
One trigger 231, the second trigger 232 and logic comparator 235.First trigger 231 include the first control terminal D1,
First input end IN1, the first resetting end Reset1 and the first output end Q1.The first control terminal D1 and the first voltage
Source VDD1 is electrically connected, and the first input end IN1 and the driving mould group 210 are electrically connected, the first output end Q1 and
The signal processing mould group 270 is electrically connected, the output end electricity of the first resetting end Reset1 and the logic comparator 235
Property connection.Second trigger 232 includes the second control terminal D2, the second input terminal IN2, the second resetting end Reset2 and the
Two output end Q2.The second control terminal D2 and the second voltage source VDD2 is electrically connected, and the second input terminal IN2 surpasses with described
The 4th conductive layer 32 of acoustic receiver mould group 30 is electrically connected, the second output terminal Q2 and the signal processing mould group
270 are electrically connected, and the output end of the second resetting end Reset2 and the logic comparator 235 is electrically connected.The logic
The first input end of comparator 235 and the first output end Q1 are electrically connected, the second input terminal of the logic comparator 235
It is electrically connected with the second output terminal Q2.In the present embodiment, the logic comparator 235 is and door (AND gate).
In other embodiments, the control signal of second trigger 232 can be electrically connected with the first voltage source VDD1,
And then omit the second voltage source VDD2.
Referring to Fig. 4, when there is touch operation to be applied on the supersonic sensing device 100, first trigger
The driving signal that 231 first input end IN1 reception is exported by the driving mould group 210, the second of second trigger 232
Input terminal IN2 receives the sensing signal exported by the ultrasonic wave receiving module 30.When the advanced institute of the phase of the driving signal
When stating the phase of sensing signal, the first output end Q1 output sensing phase difference value.
Referring to Fig. 5, when there is touch operation to apply on the supersonic sensing device 100, first trigger
The driving signal that 231 first input end IN1 reception is exported by the driving mould group 210, the second of second trigger 232
Input terminal IN2 receives the sensing signal exported by the ultrasonic wave receiving module 30.When the phase of the driving signal falls behind institute
When stating the phase of sensing signal, the second output terminal Q2 output sensing phase difference value.
The 4th conductive layer 32 of the amplitude detection mould group 250 and the ultrasonic wave receiving module 30 is electrically connected.
The amplitude detection mould group 250 is used to detect the amplitude of the sensing signal and exports to the signal processing mould group 270.
The signal processing mould group 270 electrically connects with the phase-detection mould group 230 and the amplitude detection mould group 250
It connects.The signal processing mould group 270 is used to receive the amplitude and the sensing phase difference value of the sensing signal, described in detection
The amplitude of sensing signal and the driving signal, detection within the predetermined time phase-detection mould group 230 it is corresponding
Whether output end persistently exports the sensing phase difference value, and detect the preceding phase difference value and the sensing phase difference value and
Whether predetermined phase difference is located in preset range and judges whether the touch operation is effective.
If the amplitude of the sensing signal is equal to the amplitude of the driving signal, the signal processing mould group 270 is identified
It is invalid to touch.If the amplitude of the sensing signal is not equal to the amplitude of the driving signal, the signal processing mould group 270 is known
The output end of the not described sensing phase difference value simultaneously further detects whether the corresponding output end in the given time persistently exports
The sensing phase difference value.
If the corresponding output end interruption of the phase-detection mould group 230 exports the sensing phase within the predetermined time
Potential difference value, then the identification of signal processing mould group 270 touches invalid.
If the lasting output sensing of the corresponding output end of the phase-detection mould group 230 within the predetermined time
Phase signal, the further difference between the sensing phase difference value and predetermined phase difference of the signal processing mould group 270
Absolute value whether be located in preset range.
If the absolute value of difference is more than predetermined model between the phase and the predetermined phase difference of the sensing phase difference value
It encloses, then the identification of signal processing mould group 270 touches invalid；If the phase of the sensing phase difference value and the predetermined phase are poor
The absolute value of difference is located in preset range between value, then the identification of signal processing mould group 270 touches effectively, and exports touch-control
Inductive signal is to controlled member 500.In the present embodiment, when determinand is water, the sense of the output of ultrasonic wave receiving module 30
The phase and amplitude for surveying signal all changes, but the phase-unstable of sensing signal in the given time, when and drive of lead is believed
Number phase, when and fall behind the phase of driving signal；When determinand is oil, the sensing signal of the output of ultrasonic wave receiving module 30
Phase and amplitude all change, but the phase change range of sensing signal is larger, and is more than the 70% of predetermined phase difference；To
When survey object is metal, the phase and amplitude for the sensing signal that ultrasonic wave receiving module 30 exports does not change.
Wherein, predetermined phase difference is the phase difference of the driving signal and the sensing signal in no touch operation
Value φ.The preset range is 0-0.7 φ.
Controlled member 500 and signal processing mould group 270 are electrically connected.The controlled member 500 is according to touch-control sensing signal
Execute corresponding operation.Such as: the controlled member 500 can be the LED in 100 display screen of supersonic sensing device,
Corresponding operation can lighting or extinguish for LED.In other embodiments, the controlled member 500 is also possible to switch
Element, corresponding operation can be the conducting and closing of switch, be not limited thereto.
Table 1 is amplitude variations, the phase change that different determinands are applied to sensing signal on the supersonic sensing device 100
Change mode and phase change range.
Table one
Wherein,For the phase difference value of driving signal and sensing signal in no touch control operation.
Referring to Fig. 6, the diagrammatic cross-section of its supersonic sensing device 300 provided for second embodiment of the invention.
The supersonic sensing device 300 is multipoint mode supersonic sensing device.The supersonic sensing device 300 and supersonic sensing
The difference of device 300 is: substrate 110 and ultrasonic wave receiving module 45.
The ultrasonic wave receiving module 45 by the second adhesive layer 14 be bonded in the ultrasonic wave emitting mould train 20 with it is described
On the opposite surface of cover board 10.
The ultrasonic wave receiving module 45 is used to receive the ultrasonic wave of reflection and is accordingly converted into partial charge, and will be described
Partial charge coupling is converted into electric signal and exports to the supersonic sensing device detection circuit 200.The electric signal can be via
One flexible circuit board or other electric conduction routings are transferred to the supersonic sensing device detection circuit 200.The ultrasonic wave receives
Mould group 45 includes third conductive layer 451 and the second piezoelectric layer 454.Second piezoelectric layer 454 receives the ultrasonic energy of reflection simultaneously
It is converted into partial charge.Third conductive layer 451 is as a biasing electrode layer for receiving a ground voltage or a bias voltage.In
In the present embodiment, the third conductive layer 451 is grounded.Preferably, the third conductive layer 451 can be led via conducting resinl with second
Electric layer 22 is grounded via flexible circuit board or other electric conduction routings together after electrically conducting.The third conductive layer 451 passes through institute
The second adhesive layer 14 is stated to be bonded on second conductive layer 22 surface opposite with the cover board 10.In the present embodiment,
The third conductive layer 451 is made of metal material, for example, silver, the silver such as copper (Ag), copper (Cu), molybdenum (Mo) etc., but not as
Limit.Second piezoelectric layer 451 for poly- vinylidene difluoride (PolyvinylideneFluoride, PVDF) material by being made.
It is appreciated that the stratification position relationship of the ultrasonic wave emitting mould train 20 and ultrasonic wave receiving module 30 is interchangeable.
The substrate 110 is set on second piezoelectric layer 454 surface opposite with the cover board 10.The substrate
110 be thin film transistor base plate, is provided with thin film transistor (TFT) (Thin Film Transistor, TFT) array.The base
TFT on plate 110 is coupled with the second piezoelectric layer 454, and the charge generated on second piezoelectric layer 454 is converted to telecommunications
Number, the electric signal is as sensing signal and exports to the supersonic sensing device detection circuit 200.The substrate 110 by
Transparent glass or plastic material are made.In the present embodiment, the substrate 110 can be glass substrate or other have height
The transparent substrate of intensity, high rigidity, such as polycarbonate (Polycarbonate, PC), polyester (Polythylene
Terephthalate, PET), polymethyl methacrylate (Polymethylmethacrylate, PMMA), cycloolefin copolymer close
The materials such as object (Cyclic Olefin Copolymer, COC) or polyether sulfone (Polyether sulfone, PES) are made.At it
In his embodiment, the substrate 110 or flexible base board.
Referring to Fig. 7, it is a kind of supersonic sensing detection method.Its ultrasonic wave for being applied to above-mentioned first embodiment
In sensing device 100 or the supersonic sensing device 300 of second embodiment.Supersonic sensing detection method includes following step
It is rapid:
Step S71 receives the driving signal for driving the ultrasonic wave emitting mould train 20 and receives by the ultrasonic wave
Receiving module 30 according to the ultrasonic wave being reflected back by determinand and accordingly generates sensing signal.
Step S72, the amplitude detection mould group 250 detect the driving signal and the sensing signal amplitude whether phase
Deng.If the amplitude of the sensing signal is equal to the amplitude of the driving signal, identify that touch is invalid, process terminates；If described
The amplitude of sensing signal is not equal to the amplitude of the driving signal, thens follow the steps S73.
Step S73, the phase-detection mould group 230 according to the driving signal and the phase change of the sensing signal and
Generate sensing phase difference value.Wherein, phase-detection mould group 230 includes the first output end Q1 and second output terminal Q2.From described
One output end Q1 still from the second output terminal Q2 export the sensing phase difference value characterize respectively the sensing signal with
Driving signal phase is backward or advanced relationship.Wherein, the first output end Q1 of the phase-detection mould group 230 exports institute
When stating sensing phase difference value, the phase of the sensing signal falls behind the phase of the driving signal, the phase-detection mould group 230
Second output terminal Q2 when exporting the sensing phase difference value, the phase of the phase of the sensing signal driving signal in advance
Position.
Step S74, the signal processing mould group 270 identify in the phase-detection mould group 230 for exporting the sensing
The output end of phase difference value.
Step S75, the signal processing mould group 270 detect the correspondence of the phase-detection mould group 230 in the given time
Whether output end persistently exports the sensing phase difference value.If the correspondence output end of the phase-detection mould group 230 is interrupted output
The sensing phase difference value then identifies that touch is invalid, and process terminates；If the corresponding output of the phase-detection mould group 230 supports
The continuous output sensing phase difference value, thens follow the steps S76.
Step S76, the signal processing mould group 270 detect it is described sensing phase difference value phase and predetermined phase difference it
Between the absolute value of difference whether be located in preset range.If poor between the phase and predetermined phase difference of the sensing phase difference value
The absolute value of value exceeds preset range, then identifies that touch is invalid, process terminates；If the phase of the sensing phase difference value and predetermined
The absolute value of difference is located in preset range between phase difference value, thens follow the steps S77.Wherein, predetermined phase difference is not have
The phase difference value of the driving signal and sensing signal when having a touch operationThe preset range is
In the present embodiment, when determinand be water when, ultrasonic wave receiving module 30 export sensing signal phase and
Amplitude all changes, but the phase-unstable of sensing signal in the given time, when and the phase of drive of lead signal, Shi Erluo
The phase of driving signal afterwards；When determinand is oil, the phase and amplitude for the sensing signal that ultrasonic wave receiving module 30 exports is all
Variation, but the phase change range of sensing signal is larger, and is more than the 70% of predetermined phase difference；When determinand is metal,
The phase and amplitude for the sensing signal that ultrasonic wave receiving module 30 exports does not change.
Step S77, the signal processing mould group 270 export touch sensing signal and are executed accordingly with controlling controlled member 500
Operation.In the present embodiment, the controlled member 500 can be in 100 display screen of supersonic sensing device
LED, corresponding operation can lighting or extinguish for LED.In other embodiments, the controlled member 500 is also possible to
Switch element, corresponding operation can be the conducting and closing of switch.
Above-mentioned supersonic sensing device detection circuit 200 detects the phase of sensing signal and the variation of amplitude, and root simultaneously
According to detect phase and amplitude identification touch operation it is whether effective, and by the given time detect driving signal phase and
Variation between sensing signal phase further improves the touch-control accuracy of supersonic sensing device, reduces water droplet, grease
And influence of other substances such as metal to touch control operation.
Those skilled in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as within spirit of the invention, it is to the above embodiments
Appropriate change and variation are all fallen within the scope of protection of present invention.
Claims (13)
1. a kind of supersonic sensing device, including the detection of ultrasonic wave emitting mould train, ultrasonic wave receiving module, supersonic sensing device
Circuit and controlled member；The ultrasonic wave emitting mould train is for generating ultrasonic wave；The ultrasonic wave receiving module is for receiving
The ultrasonic wave being reflected back by determinand, and accordingly generate sensing signal；The supersonic sensing device detection circuit simultaneously with institute
It states ultrasonic wave emitting mould train and the ultrasonic wave receiving module is electrically connected；It is characterized by: the supersonic sensing device inspection
It is defeated to receive the ultrasonic wave receiving module to drive the ultrasonic wave emitting mould train to generate ultrasonic wave for slowdown monitoring circuit output drive signal
Sensing signal out identifies current touch behaviour according to the phase change and amplitude variations of the sensing signal and the driving signal
Whether work is effective, and exports touch-sensing signal when touch operation is effective to control the controlled member and execute corresponding behaviour
Make；The supersonic sensing device detection circuit detects the phase difference value of the sensing signal and the driving signal and generates sense
Survey phase difference value；When the amplitude of the sensing signal is identical as the amplitude of the driving signal, then it is assumed that touch objects are non-quilt
The determinand of approval and touch it is invalid；When the amplitude of the sensing signal is different from the amplitude of the driving signal, in pre- timing
In be continuously detected the sensing phase difference value, and between the sensing phase difference value and predetermined phase difference difference it is absolute
When value is located in preset range, then it is assumed that touch objects are approved determinand and touch effective.
2. supersonic sensing device as described in claim 1, it is characterised in that: the supersonic sensing device detection circuit packet
Include amplitude detection mould group, driving mould group, phase-detection mould group and signal processing mould group；The amplitude detection mould group surpasses with described
Acoustic receiver mould group and the signal processing mould group are electrically connected；The amplitude detection mould group is for detecting the sensing signal
Amplitude is simultaneously exported to the signal processing mould group；The driving mould group and the ultrasonic wave emitting mould train and the phase-detection mould
Group is electrically connected, and gives the ultrasonic wave emitting mould train and the phase-detection mould group for output drive signal；The phase inspection
It surveys mould group and the driving mould group and the ultrasonic wave receiving module is electrically connected, for detecting the driving signal and the sense
The phase change of signal is surveyed to generate sensing phase difference value；The signal processing mould group is according to the sensing signal and the driving
The amplitude of signal, the sensing phase difference value judge whether current touch operation is effective.
3. supersonic sensing device as claimed in claim 2, it is characterised in that: the phase-detection mould group includes the first triggering
Device, the second trigger and logic comparator；The logic comparator includes first input end, the second input terminal and output end,
First trigger includes first input end, the first resetting end and the first output end；Second trigger includes second
Input terminal, the second resetting end and second output terminal；The first input end of first trigger and the driving mould group
It is electrically connected, first output end of first trigger and the signal processing mould group are electrically connected, first weight
It sets end and the output end of the logic comparator is electrically connected；Second input terminal of second trigger and the ultrasound
Wave receiving module is electrically connected, and the second output terminal and the signal processing mould group are electrically connected, the second resetting end with
The output end of the logic comparator is electrically connected；The first input end of the logic comparator and first output end are electrical
Connection, the second input terminal of the logic comparator and the second output terminal are electrically connected.
4. supersonic sensing device as claimed in claim 2, it is characterised in that: the phase-detection mould group includes the first output
End and second output terminal；If the amplitude of the sensing signal is not equal to the amplitude of the driving signal, the signal processing mould
Group identification it is described sensing phase difference value output end and detect in the given time corresponding output end whether persistently output described in
Sense phase difference value；If the corresponding output end of the phase-detection mould group persistently exports the sensing phase difference in the given time
Value, then the signal processing mould group further it is more described sensing phase difference value and predetermined phase difference between difference absolute value
Whether it is located in preset range；If the absolute value of difference is located at pre- between the sensing phase difference value and the predetermined phase difference
Determine in range, then the signal processing mould group identification touches effectively, and exports touch-sensing signal to control the controlled member
Execute corresponding operation.
5. supersonic sensing device as claimed in claim 4, it is characterised in that: the predetermined phase difference is not touch
The phase difference value of the driving signal and sensing signal when operationThe preset range is
6. a kind of supersonic sensing device detection circuit, the supersonic sensing device detection circuit and ultrasonic wave emitting mould train,
Ultrasonic wave receiving module and controlled member are electrically connected；It is characterized by: the supersonic sensing device detection circuit driving
The ultrasonic wave emitting mould train generates ultrasonic wave, and receives the sensing signal exported by the ultrasonic wave receiving module；It is described super
Acoustic wave sensing devices detection circuit includes driving mould group, phase-detection mould group, amplitude detection mould group and signal processing mould group；Institute
It states driving mould group and the ultrasonic wave emitting mould train and the phase-detection mould group is electrically connected, for output drive signal to institute
State ultrasonic wave emitting mould train and the phase-detection mould group；The phase-detection mould group and the driving mould group and the ultrasonic wave
Receiving module is electrically connected, for generating sensing phase difference according to the phase difference value of the driving signal and the sensing signal
Value；The amplitude detection mould group and the signal processing mould group are electrically connected, for detecting the amplitude of the sensing signal and defeated
Out to the signal processing mould group；The signal processing mould group is according to the amplitude and the sensing phase difference value of the sensing signal
Judge whether current touch operation is effective, and exports touch-sensing signal when touch operation is effective to control controlled member execution
Corresponding operation.
7. supersonic sensing device detection circuit as claimed in claim 6, it is characterised in that: when the amplitude of the sensing signal
When identical as the amplitude of the driving signal, then it is assumed that touch objects are non-approved determinand and touch in vain；When the sense
The amplitude for surveying signal is different from the amplitude of the driving signal, is continuously detected the sensing phase difference value in the given time,
And when the absolute value of difference is located in preset range between the sensing phase difference value and predetermined phase difference, then it is assumed that touch objects
For approved determinand and touch effective.
8. supersonic sensing device detection circuit as claimed in claim 7, it is characterised in that: the phase-detection mould group includes
First output end and second output terminal；If the amplitude of the sensing signal is not equal to the amplitude of the driving signal, the letter
Number processing mould group identify it is described sensing phase difference value output end and detect in the given time corresponding output end whether continue
Export the sensing phase difference value；If the corresponding output end of the phase-detection mould group persistently exports the sense in the given time
Phase difference value is surveyed, then the further difference between the sensing phase difference value and predetermined phase difference of the signal processing mould group
Absolute value whether be located in preset range；If difference is absolute between the sensing phase difference value and the predetermined phase difference
Value is located in preset range, then the signal processing mould group identification touches effectively, and it is described to control to export touch-sensing signal
Controlled member executes corresponding operation.
9. supersonic sensing device detection circuit as claimed in claim 8, it is characterised in that: the predetermined phase difference be
The phase difference value of the driving signal and sensing signal when not having a touch operationThe preset range is
10. supersonic sensing device detection circuit as claimed in claim 7, it is characterised in that: the phase-detection mould group packet
Include the first trigger, the second trigger and logic comparator；First trigger includes first input end, the first resetting end
And first output end；Second trigger includes the second input terminal, the second resetting end and second output terminal；Described first
The first input end of trigger and the driving mould group are electrically connected, first output end of first trigger and
The signal processing mould group is electrically connected, and the output end of the first resetting end and the logic comparator is electrically connected；It is described
Second input terminal of second trigger and the ultrasonic wave receiving module are electrically connected, the second output terminal and the letter
Number processing mould group be electrically connected, it is described second resetting end and the logic comparator output end be electrically connected；The logic ratio
It is electrically connected compared with the first input end of device and first output end, the second input terminal of the logic comparator and described second
Output end is electrically connected.
11. a kind of supersonic sensing detection method, is used in supersonic sensing device；The supersonic sensing device includes connecing
Driving signal is received generating the ultrasonic wave emitting mould train of ultrasonic wave, receiving the ultrasonic wave being reflected back by determinand and accordingly generating sense
Survey ultrasonic wave receiving module, supersonic sensing device detection circuit and the controlled member of signal；The supersonic sensing device
Detection circuit includes phase-detection mould group and amplitude detection mould group；The supersonic sensing detection method includes the following steps:
Reception is for driving the driving signal of the ultrasonic wave emitting mould train and by ultrasonic wave receiving module output
Sensing signal；
Whether the amplitude of the amplitude and the sensing signal that detect the driving signal is equal；
If the amplitude of the sensing signal is not equal to the amplitude of the driving signal, believed according to the driving signal and the sensing
Number phase change and export sensing phase difference value；
It identifies in the phase-detection mould group for exporting the output end of the sensing phase difference value；
Whether the correspondence output end of the phase-detection mould group persistently exports the sensing phase difference value in the given time；
If the correspondence output end of the phase-detection mould group persistently exports the sensing phase difference value in the given time, by institute
The absolute value for stating difference between sensing phase difference value and the predetermined phase difference of phase-detection mould group output is located in preset range,
Output touch-sensing signal executes corresponding operation to control the controlled member.
12. supersonic sensing detection method as claimed in claim 11, it is characterised in that: the predetermined phase difference is not have
The phase difference value of the driving signal and sensing signal when having a touch operation.
13. supersonic sensing detection method as claimed in claim 11, it is characterised in that: the preset range is
WhereinFor the phase difference value of described in no touch operation driving signal and the sensing signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710026234.7A CN106896955B (en) | 2017-01-13 | 2017-01-13 | Supersonic sensing device and its detection circuit and detection method |
| TW106101754A TWI644244B (en) | 2017-01-13 | 2017-01-18 | Ultrasonic sensing apparatus, ultrasonic sensing detecting circuit thereof, and detecting method thereof |
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| CN201710026234.7A CN106896955B (en) | 2017-01-13 | 2017-01-13 | Supersonic sensing device and its detection circuit and detection method |
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| CN107291307A (en) | 2017-07-26 | 2017-10-24 | 京东方科技集团股份有限公司 | Ultrasonic wave contactor control device and method, display device |
| CN109753110A (en) * | 2017-11-02 | 2019-05-14 | 南昌欧菲生物识别技术有限公司 | Housing unit and electronic device |
| CN108652665A (en) * | 2018-03-21 | 2018-10-16 | 业成科技（成都）有限公司 | Sensing device further |
| CN108652671A (en) * | 2018-03-21 | 2018-10-16 | 业成科技（成都）有限公司 | Sensing device further |
| CN108768207A (en) * | 2018-05-31 | 2018-11-06 | 业成科技（成都）有限公司 | Touch device |
| CN109829419B (en) | 2019-01-28 | 2021-08-24 | 京东方科技集团股份有限公司 | Fingerprint identification module, driving method and manufacturing method thereof and display device |
| CN109993156B (en) * | 2019-04-24 | 2022-09-06 | 京东方科技集团股份有限公司 | Ultrasonic fingerprint identification panel and display device |
| CN110278304B (en) * | 2019-06-28 | 2021-08-24 | Oppo广东移动通信有限公司 | Electronic device and control method of electronic device |
| CN110300226B (en) * | 2019-06-28 | 2021-06-29 | Oppo广东移动通信有限公司 | Electronic equipment and control method of flashlight thereof |
| CN110286738B (en) * | 2019-06-29 | 2021-06-08 | Oppo广东移动通信有限公司 | Fingerprint acquisition method and related product |
| US11333634B2 (en) | 2019-10-23 | 2022-05-17 | Industrial Technology Research Institute | Signal sensing module and ultrasonic probe using the same |
| TWI768369B (en) * | 2019-10-23 | 2022-06-21 | 財團法人工業技術研究院 | Signal sensing module and ultrasonic probe using the same |
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Also Published As
| Publication number | Publication date |
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| TW201826098A (en) | 2018-07-16 |
| TWI644244B (en) | 2018-12-11 |
| CN106896955A (en) | 2017-06-27 |
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