CN107608571A - A kind of sound wave touch control device and terminal - Google Patents
A kind of sound wave touch control device and terminal Download PDFInfo
- Publication number
- CN107608571A CN107608571A CN201710794836.7A CN201710794836A CN107608571A CN 107608571 A CN107608571 A CN 107608571A CN 201710794836 A CN201710794836 A CN 201710794836A CN 107608571 A CN107608571 A CN 107608571A
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- Prior art keywords
- sound wave
- sound
- acoustic panels
- processor
- touch
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Classifications
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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
Abstract
This application discloses a kind of sound wave touch control device and terminal.The equipment is used to be operated according to the touch action being applied in, and the equipment includes：Acoustic panels, for producing the first sound wave, and the waveform of the first sound wave changes in the presence of touch action；Sound pick-up, for receiving the first sound wave after changing；Processor, respectively with acoustic panels and sound pick-up electric property coupling, for exporting electric signal to acoustic panels, so that acoustic panels produce the first sound wave, and for the first sound wave after processing variation, produce control instruction and control the equipment to be operated.In this way, the touch-control to equipment and terminal can be realized by the first sound wave.
Description
Technical field
The application is related to technical field of touch control, more particularly to a kind of sound wave touch control device and terminal.
Background technology
Touch-screen is a kind of induction type liquid crystal display device for receiving the input signals such as contact, when contacting on screen
During graphic button, the haptic feedback system on screen can drive various link devices according to the formula of preprogramming, can be used to take
For mechanical push button panel, and lively visual and sound effects are produced by liquid crystal display picture.Present intelligent mobile phone,
The electronic products such as PDA, tablet personal computer, digital camera, mostly equipped with touch-screen, user can be allowed with more convenient using touch-screen
Mode enter the operating instructions to manipulate electronic product.
But present inventor has found in long-term research and development, in currently available technology, the touch-control in electronic product
It is capacitive touch screen or resistive touch screen that device is outer, by the capacitance on touch-screen or resistance value produce change come
Reach the effect of touch-control.But there is the shortcomings of expensive in condenser type or resistive touch screen.
Apply for content
The application utilizes sound wave pair mainly solving the technical problems that provide a kind of sound wave touch control device and terminal, to realize
The touch-control of equipment and terminal.
In order to solve the above technical problems, the technical scheme that the application uses is：A kind of sound wave touch control device is provided, used
Operated according to the touch action being applied in, the equipment includes：Acoustic panels, for producing the first sound wave, and it is described
The waveform of first sound wave changes in the presence of the touch action；Sound pick-up, for receiving first sound wave after changing；
Processor, respectively with the acoustic panels and the sound pick-up electric property coupling, for exporting electric signal to the acoustic panels, with
The acoustic panels are made to produce first sound wave, and for handling first sound wave after the change, to produce control
Instruction, the control instruction are used to control the equipment to carry out the operation.
Wherein, when the touch action acts on one position of acoustic panels, first sound wave is in the position
Waveform change；The processor carries out the first acoustic waveform after the change and first acoustic waveform before change pair
Than to obtain the positional information of the position.
Wherein, the processor obtains the change of the waveform parameter of the first sound wave after the change, and from being pre-stored in ripple
Shape parameter, which changes in the corresponding relation with touch action, matches the touch action, produces and is set described in the control instruction control
It is standby to carry out the operation.
Wherein, first sound wave is single-frequency sound wave；The frequency of the single-frequency sound wave is not less than 20KHz.
Wherein, the acoustic panels include multiple drivers being evenly distributed, and the driver is used to produce the second sound wave,
First sound wave is synthesized by each second sound wave superposition, the whole acoustic panels of the first sound wave covering.
Wherein, the equipment further comprises audio decoding circuit, the audio decoding circuit and the processor, described
Acoustic panels and the sound pick-up electric property coupling, the electric signal for the processor to be exported decoded and digital-to-analogue conversion into
After send the acoustic panels to so that the acoustic panels produce first sound wave, the change that sound pick-up is received
The first sound wave afterwards encoded and analog-to-digital conversion after be transferred to the processor.
Wherein, the equipment further comprises amplifying circuit and electric power management circuit；The amplifying circuit and the processing
Device and the acoustic panels electric property coupling, the electric signal for being exported to the processor are amplified, and by after amplification
The electric signal transmission give the acoustic panels so that the acoustic panels produce first sound wave；The power management
Circuit and the acoustic panels, the sound pick-up, the processor and the amplifying circuit electric property coupling, for the sound
Panel, the sound pick-up, the processor and amplifying circuit power supply.
Wherein, the equipment further comprises loudspeaker, the loudspeaker and the processor electric property coupling, for sending
3rd sound wave of the processor processing.
Wherein, the equipment further comprises display module, and the acoustic panels are arranged at the aobvious of the display module
Show side surface, the display module shows tangible object.
In order to solve the above technical problems, the technical scheme that the application uses is：A kind of terminal, the terminal bag are provided
Include above-mentioned sound wave touch control device.
The beneficial effect of the application is：Prior art is different from, the application sound wave touch control device is produced using acoustic panels
First sound wave, and the first sound wave changes in the presence of touch action；The first sound wave after change is received using sound pick-up；Utilize
Processor produces control instruction according to the first sound wave after change, controls the sound wave touch control device to be operated, passes through this side
Formula, the first sound wave reflection touch action can be utilized, and perform operation corresponding with the touch, therefore, the application can
The touch control operation to equipment and terminal is realized using the first sound wave.
Brief description of the drawings
Fig. 1 is the structural representation of the application sound wave touch control device first embodiment；
Fig. 2 is the structural representation of the application sound wave touch control device second embodiment；
Fig. 3 is the structural representation of the application sound wave touch control device 3rd embodiment；
Fig. 4 is the structural representation of the application sound wave touch control device fourth embodiment；
Fig. 5 A are the structural representations of the acoustic panels of Fig. 4 embodiment sound wave touch control devices；
Fig. 5 B are the first state figures of the first sound wave of Fig. 5 A embodiment acoustic panels；
Fig. 5 C are the second state diagrams of the first sound wave of Fig. 5 A embodiment acoustic panels；
Fig. 6 is the schematic flow sheet of the embodiment of the application sound wave touch control device workflow one；
Fig. 7 is the structural representation of the embodiment of the application terminal one.
Embodiment
Referring to Fig. 1, Fig. 1 is the structural representation of the application sound wave touch control device first embodiment.The present embodiment sound wave
Touch control device 101 is used to be operated according to the touch action being applied in.The present embodiment sound wave touch control device 101 includes sound face
Plate 102, sound pick-up 103 and processor 104, processor 104 respectively with acoustic panels 102, the electric property coupling of sound pick-up 103.Sound
Panel 102 is used to produce the first sound wave, and the first sound wave changes in the presence of touch action, and sound pick-up 103, which is used to receive, to be become
The first sound wave after change；Processor 104 is used to export electric signal to acoustic panels 102, so that acoustic panels 102 produce the first sound
Ripple, and for the first sound wave after processing variation, to produce control instruction, control sound wave touch control device 101 is operated.
When sound wave encounters object in communication process, it may appear that reflection, diffraction and scattering phenomena such as, so as to change its ripple
Shape.In the present embodiment, when the finger of user is close or touches the side surface of speaking of acoustic panels 102, the first sound is touched
During ripple, i.e. when the touch action of user acts on first sound wave, the waveform of first sound wave can be changed, the ripple of first sound wave
Shape parameter mainly includes frequency, phase and amplitude etc..
The sound pick-up 103 of the present embodiment is digital microphone, and the great advantage of digital microphone is strong antijamming capability, nothing
Need to as traditional microphones built-in high-frequency filter capacitor, filter circuit.The digital microphone output of the present embodiment is several
Word audio signal.The digital microphone can be replaced with simulation sound pick-up (for example, simulation microphone) in other embodiments.
Prior art is different from, the present embodiment sound wave touch control device 101 can send the first sound using acoustic panels 102
Ripple, and changed using first acoustic waveform and put on the touch action of sound wave touch control device 101 to reflect, and perform and touched with this
Touch and operated corresponding to action, the touch control operation to sound wave touch control device 101 can be realized using the first sound wave.
Alternatively, when the touch action of the present embodiment acts on a certain position of acoustic panels 102, first sound wave is at this
The waveform change of position；The first sound wave after the processing variation of processor 104, to obtain the positional information of the position；Processor 104
Control instruction control sound wave touch control device 101 is produced according to the positional information and carries out operate corresponding with the touch action.This reality
Apply example " touch action act on acoustic panels 102 " refer to produce touch action object contact acoustic panels 102 caused by
First sound wave.
In an application scenarios, processor 104 is by the software analytical algorithm of loading to the first sound wave ripple after change
Shape is parsed, and is carried out in the equipment manager that the coordinate data got is passed through into hardware abstraction layer with reference coordinate at algorithm
Manage and except correction of making an uproar, obtain the positional information of touch action application position.
In another application scene, the processor 104 of the present embodiment can be by the waveform after change and the waveform before change
Contrasted, to obtain the positional information that the first sound wave changes, so as to obtain the positional information of touch action application.When
So, in other application scene, processor 104 can also obtain waveform from the waveform after change and substantially be different from other positions
The positional information of waveform, the positional information are the positional information of touch action application position.
Alternatively, the processor 104 of the present embodiment can be dynamic with touching by the specific change of the waveform parameter of the first sound wave
Correspond to, during the first sound wave after processing variation, first obtain the specific change of the waveform parameter and the parameter of change, Ran Houcong
Waveform parameter change is pre-stored in matching corresponding touch action in the corresponding relation of touch action, and produces corresponding control
Instruction control performs operate corresponding with touch action.For example, if processor 104 is got under the amplitude of the first acoustic waveform
Drop, frequency increase, then pressing action is matched from the corresponding relation for being pre-stored in waveform parameter change and touch action, produce phase
The control instruction control answered performs single-click operation corresponding with pressing action, if then for example processor 104 gets the first sound wave
The phase of waveform reduce, then make with matching left slide in the corresponding relation of touch action from being pre-stored in waveform parameter change,
Produce corresponding control instruction control and perform and make corresponding touch interface shift left operation, etc. with left slip.Certainly, in other realities
Applying can also use other manner to realize in example controls corresponding operation using the first sound wave.It is for example, it is also possible to dynamic by touching
Make to carry out with reference waveform (can in advance by test obtain) it is corresponding, can be by the waveform after change and the reference waveform stored
Matched, to obtain corresponding control instruction etc..
The application further provides for the sound wave touch control device of second embodiment, the sound wave touch control device disclosed in the present embodiment
It is described on the basis of the sound wave touch control device of above-described embodiment.Referring to Fig. 2, the present embodiment sound wave touch control device 201
Further comprise loudspeaker 202, loudspeaker 202 and the electric property coupling of processor 203；Loudspeaker 202 is used to send at processor 203
3rd sound wave of reason.3rd sound wave is used to provide the audio signal needed for user, and the 3rd sound wave should be examined easily by human ear
Feel, its frequency range is generally 20HZ-20KHZ.
Alternatively, the first sound wave of the present embodiment sound wave touch control device 201 is single-frequency sound wave, the independence of single-frequency sound wave compared with
By force, it is not easy to influence above-mentioned the 3rd sound wave for being used to provide the audio signal needed for user, and is not easy to be influenceed by other sound waves.
In order to prevent the first sound wave caused by acoustic panels 204 from being interfered with the 3rd sound wave caused by loudspeaker 202, need
First sound wave and the 3rd sound wave are arranged in different frequency range.The frequency of the single-frequency sound wave of the present embodiment is not less than 20KHz.
The application further provides for the sound wave touch control device of 3rd embodiment, the sound wave touch control device disclosed in the present embodiment
It is described on the basis of the sound wave touch control device of above-described embodiment.Referring to Fig. 3, the present embodiment sound wave touch control device 301
Further comprise audio decoding circuit 302, audio decoding circuit 302 and processor 303, acoustic panels 304 and the electricity of sound pick-up 305
Property coupling, the electric signal for processor 303 to be exported is decoded and digital-to-analogue conversion sends acoustic panels 304 to after, with
Acoustic panels 304 are made to produce the first sound wave, the first sound wave after the change that sound pick-up 305 is received is encoded and analog-to-digital conversion
After be transferred to processor 303, meanwhile, also with the electric property coupling of loudspeaker 306, processor 303 is exported for audio decoding circuit 302
Electric signal is decoded and digital-to-analogue conversion sends loudspeaker 306 to after, so that loudspeaker 306 produces the 3rd sound wave.
In an application scenarios, the audio decoding circuit 302 of the present embodiment is codec
(CODEC).CODEC is a kind of multifunctional circuit, and it has the functions such as compression, decompression, digital-to-analogue conversion, analog-to-digital conversion, and supports
Audio-frequency bus input and output, the three-dimensional voice output of multiple loudspeakers, the access of multiple sound pick-ups, control interface etc..In reality
During circuit realiration, CODEC difference in functionality according to different design requirements, can be enabled.In other application scene, sound
Frequency decoding circuit 302 can also be other with compression, the circuit or device of decompression function.
Alternatively, I2S is passed through between the audio decoding circuit 302 of the present embodiment and processor 303 and acoustic panels 304
(Inter-IC Sound) EBI carries out data transmission.I2S is one of the voice data transmission between digital audio-frequency apparatus
Kind bus standard, specializes in the data transfer between audio frequency apparatus.It is employed believes along independent wire transmission clock and data
Number design, by the way that data and clock signal are separated, avoid the distortion induced by the time difference, purchase resistance saved for user
The expense of the professional equipment of audio jitter.Its concrete model should with audio decoding circuit 302 support audio-frequency bus input and
Output interface is consistent, is easy to high speed, the undistorted transmission of data.Certainly, in other embodiments, other buses can also be used
Interface substitutes I2S, such as time division multiplexing and pulse time-sharing multiplex.
Alternatively, the present embodiment sound wave touch control device 301 further comprises amplifying circuit 307 and electric power management circuit 308；
Amplifying circuit 307 and processor 308 and the electric property coupling of acoustic panels 304, the electric signal for being exported to processor 303 are put
Greatly, and by the electric signal transmission after amplification to acoustic panels 304, so that acoustic panels 304 produce the first sound wave；Power management electricity
Road 308 and acoustic panels 304, sound pick-up 305, processor 303, audio decoding circuit 302 and the electric property coupling of amplifying circuit 307,
For being powered to acoustic panels 304, sound pick-up 305, processor 303, audio decoding circuit 302 and amplifying circuit 308.Certainly,
The electric power management circuit 308 of the present embodiment also with the electric property coupling of loudspeaker 306, is powered to loudspeaker 306, amplifying circuit 307
Processing further can be amplified to the signal of sound pick-up 305 and loudspeaker 306.
The application further provides for the sound wave touch control device of fourth embodiment, the sound wave touch control device disclosed in the present embodiment
It is described on the basis of the sound wave touch control device of above-described embodiment.The present embodiment sound wave touch control device 401 further comprises
Display module 402, and acoustic panels 403 are arranged at the display side surface of display module 402, display module 402 is touch action
Tangible object is provided.Wherein, acoustic panels 403 are transparent material.
Alternatively, also referring to Fig. 5 A-5C, Fig. 5 A are the structures of the acoustic panels of Fig. 4 embodiment sound wave touch control devices
Schematic diagram；Fig. 5 B are the first state figures of the first sound wave of Fig. 5 A embodiment acoustic panels；Fig. 5 C are Fig. 5 A embodiment sound faces
Second state diagram of the first sound wave of plate.The present embodiment acoustic panels 403 include multiple drivers 501 being evenly distributed, excitation
Device 501 is used to produce the second sound wave, the second sound wave superposition the first sound wave of synthesis, and the first sound wave covers whole acoustic panels 403 (such as
Shown in Fig. 5 B), the homogenization is designed to improve the touch accuracy of acoustic panels 403.
Driver 501 is a kind of special vibrations device, and this device is to the very low of acoustics cavity, it is not necessary to traditional
The structure design of forward and backward sound chamber, it, which will drive, to promote air pulsation to produce the second sound wave, when touch action acts on the second sound wave
When, its vibration behavior can be changed (the first acoustic waveform as shown in Figure 5 C, synthesized by the second sound wave substantially changes).
Certainly in other embodiments, the setting of driver 501 can also be according to display interface to the specific of touch controllable function
It is required that to determine.For example, for the part for only having several positions apart from each other to need touch display interface, then excitation can be reduced
The distribution of device 501.
Referring to Fig. 6, Fig. 6 is the schematic flow sheet of the embodiment of the application sound wave touch control device workflow one.This implementation
Example specifically includes following steps：
Step 601：Start touch function.
Step 602：Initialize acoustic panels, audio decoding circuit, sound pick-up and loudspeaker.The initialization is mainly to sound
It is electric on sound panel, audio decoding circuit, sound pick-up, loudspeaker and other circuits, can normal work to check whether by upper electricity.
Step 603：Judge whether above-mentioned initialization succeeds.Step 605 is carried out if success, no person carries out step 604.
Step 604：Prompt user to restart touch function, or check hardware.
Step 605：Parameter configuration.Specifically, processor sends commands to CODEC, and control CODEC configures the ginseng of itself
Number, including the parameter such as compression, analog-to-digital conversion, I2S buses, and send order configuration loudspeaker, sound pick-up, acoustic panels, power supply
The relevant parameter of circuit and amplifying circuit is managed, for example, the size of the supply current of configuration electric power management circuit and voltage, amplification
Gain coefficient of circuit etc..
Step 606：Judge whether above-mentioned parameter configuration succeeds, if success, carries out step 608, otherwise carry out step
607.Specifically, can feedback command notifier processes device after above-mentioned each circuit initializes successfully.
Step 607：Abnormal prompt.
Step 608：Gather sound wave.The acquisition principle of sound wave and realize operation of the touch-control to equipment and terminal using sound wave
Principle has all been described in detail in the above-described embodiments, does not repeat here.
Refering to Fig. 7, Fig. 7 is the structural representation of the embodiment of the application terminal one.The present embodiment is mobile phone terminal, certainly,
The application terminal can be but not limited to mobile phone, PDA, tablet personal computer, digital camera etc..The present embodiment terminal 701 includes above-mentioned
The sound wave touch control device 702 of embodiment, sound wave touch control device 702 specifically include acoustic panels 703, sound pick-up 704 and processor
705, processor 705 respectively with acoustic panels 703, the electric property coupling of sound pick-up 704.Acoustic panels 703 are used to produce the first sound wave,
And first sound wave change in the presence of touch action, sound pick-up 704 be used for receive change after the first sound wave；Processor 705
For exporting electric signal to acoustic panels 703, so that acoustic panels 703 produce the first sound wave, and for the after processing variation
One sound wave, to produce control instruction, control terminal 701 is operated.
Certainly, the sound pick-up 704 of the present embodiment can also be arranged at the other positions of terminal 701, such as the side of terminal 701
Or away from the side of the acoustic panels 703.
Prior art is different from, the present embodiment terminal 701 can send the first sound wave using acoustic panels 703, and utilize
First acoustic waveform change puts on the touch action of terminal 701 to reflect, and performs operation corresponding with the touch action,
The touch control operation to terminal 701 can be realized using the first sound wave.
Extension to the application terminal 701 is similar to the above embodiments, does not repeat here.
Presently filed embodiment is the foregoing is only, not thereby limits the scope of the claims of the application, it is every to utilize this
The equivalent structure or equivalent flow conversion that application specification and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, similarly it is included in the scope of patent protection of the application.
Claims (10)
- A kind of 1. sound wave touch control device, it is characterised in that for being operated according to the touch action being applied in, the equipment bag Include：Acoustic panels, for producing the first sound wave, and the waveform of first sound wave changes in the presence of the touch action；Sound pick-up, for receiving first sound wave after changing；Processor, respectively with the acoustic panels and the sound pick-up electric property coupling, for exporting electric signal to the sound face Plate, so that the acoustic panels produce first sound wave, and for handling first sound wave after the change, to produce Control instruction, the control instruction are used to control the equipment to carry out the operation.
- 2. equipment according to claim 1, it is characterised in that the touch action acts on the position of acoustic panels one When, waveform change of first sound wave in the position；The processor is contrasted the first acoustic waveform after the change and first acoustic waveform before change, with Obtain the positional information of the position.
- 3. equipment according to claim 2, it is characterised in that the processor obtains the first sound wave after the change The change of waveform parameter, and match described touch from the corresponding relation for being pre-stored in waveform parameter change and touch action and move Make, produce the control instruction and control the equipment to carry out the operation.
- 4. equipment according to claim 1, it is characterised in that first sound wave is single-frequency sound wave, and the single-frequency sound The frequency of ripple is not less than 20KHz.
- 5. equipment according to claim 1, it is characterised in that the acoustic panels include multiple excitations being evenly distributed Device, the driver are used to produce the second sound wave, and first sound wave is synthesized by each second sound wave superposition, first sound The whole acoustic panels of ripple covering.
- 6. equipment according to claim 1, it is characterised in that the equipment further comprises audio decoding circuit, described Audio decoding circuit and the processor, the acoustic panels and the sound pick-up electric property coupling, for the processor is defeated The electric signal gone out is decoded and digital-to-analogue conversion sends the acoustic panels to after, so that the acoustic panels produce described the One sound wave, by sound pick-up receive the change after the first sound wave encoded and analog-to-digital conversion after be transferred to the processing Device.
- 7. equipment according to claim 1, it is characterised in that the equipment further comprises amplifying circuit and power management Circuit；The amplifying circuit and the processor and the acoustic panels electric property coupling, for described in processor output Electric signal is amplified, and gives the electric signal transmission after amplification to the acoustic panels, so that the acoustic panels produce First sound wave；The electric power management circuit and the acoustic panels, the sound pick-up, the processor and the electrical coupling of the amplifying circuit Connect, for being powered to the acoustic panels, the sound pick-up, the processor and the amplifying circuit.
- 8. equipment according to claim 1, it is characterised in that the equipment further comprises loudspeaker, the loudspeaker With the processor electric property coupling, the 3rd sound wave handled for sending the processor.
- 9. equipment according to claim 1, it is characterised in that the equipment further comprises display module, and the sound Sound panel is arranged at the display side surface of the display module, and the display module shows tangible object.
- 10. a kind of terminal, it is characterised in that including the sound wave touch control device described in any one of claim 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710794836.7A CN107608571A (en) | 2017-09-05 | 2017-09-05 | A kind of sound wave touch control device and terminal |
| PCT/CN2018/104203 WO2019047860A1 (en) | 2017-09-05 | 2018-09-05 | Acoustic wave touch device and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710794836.7A CN107608571A (en) | 2017-09-05 | 2017-09-05 | A kind of sound wave touch control device and terminal |
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| Publication Number | Publication Date |
|---|---|
| CN107608571A true CN107608571A (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710794836.7A Pending CN107608571A (en) | 2017-09-05 | 2017-09-05 | A kind of sound wave touch control device and terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN107608571A (en) |
| WO (1) | WO2019047860A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| WO2019047860A1 (en) * | 2017-09-05 | 2019-03-14 | 惠州Tcl移动通信有限公司 | Acoustic wave touch device and terminal |
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| CN105718064A (en) * | 2016-01-22 | 2016-06-29 | 南京大学 | Gesture recognition system and method based on ultrasonic waves |
| JP2017146664A (en) * | 2016-02-15 | 2017-08-24 | 株式会社Ｓｏｋｅｎ | Position detection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019047860A1 (en) * | 2017-09-05 | 2019-03-14 | 惠州Tcl移动通信有限公司 | Acoustic wave touch device and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019047860A1 (en) | 2019-03-14 |
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