CN106937206A - A kind of mobile phone screen orients sonification system - Google Patents
A kind of mobile phone screen orients sonification system Download PDFInfo
- Publication number
- CN106937206A CN106937206A CN201710322851.1A CN201710322851A CN106937206A CN 106937206 A CN106937206 A CN 106937206A CN 201710322851 A CN201710322851 A CN 201710322851A CN 106937206 A CN106937206 A CN 106937206A
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- Prior art keywords
- mobile phone
- transparent
- power amplifier
- orients
- sonification system
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- 238000007781 pre-processing Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 5
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 230000005236 sound signal Effects 0.000 description 10
- 239000000463 material Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/323—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only for loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Circuit For Audible Band Transducer (AREA)
- Telephone Set Structure (AREA)
Abstract
The present invention discloses a kind of mobile phone screen orientation sonification system, including：Signal pre-processing module, A/D converter, digital signal modulated module, power amplifier, load matching network, transparent, oriented transducer, mobile phone display screen curtain；The signal pre-processing module is connected by the A/D converter with the digital signal modulated module；The power amplifier is connected by the load matching network with the transparent, oriented transducer；The digital signal modulated module is connected with the power amplifier；The transparent, oriented transducer is located at the mobile phone display screen backstage side, and the transparent, oriented transducer includes piezoelectric vibrator, and the direction of vibration of the piezoelectric vibrator is perpendicular to mobile phone display screen curtain.The technical scheme that the present invention is provided can make mobile phone screen realize orientation sounding, and then make mobile phone unitary construction more lightening.
Description
Technical field
The invention belongs to loudspeaker field, more particularly to a kind of mobile phone screen orientation sonification system.
Background technology
Mobile phone technique has developed highly developed in modern society, or even as wallet becomes people as key
With oneself necessary article.Even if but experienced development for many years, now in all of cell phone apparatus, in audio signal output facet
The conventional diffusion formula loudspeaker for still using always, this causes that these equipment must wear ear when music, viewing film is appreciated
Machine, the sound for otherwise being sent will influence other people or leakage personal information.Meanwhile, the speaker product structure of traditional structure
Complexity, and a large amount of interior of mobile phone spaces are taken, so as to seriously limit the mobile terminals such as mobile phone develop to slimming.Therefore,
It is a kind of it is with directive property, private audio-visual space can be provided and the research of the less sonification system that takes up room is valuable.
Audio frequency directional system is a kind of audible using the aerial nonlinear propagation effects generation high directivity of ultrasonic wave
A kind of New-type loudspeaker system of sound.Audio signal forms the ultrasonic signal containing the audio signal information after treatment,
The ultrasonic wave is transmitted into air by audio directional transducer, then the ultrasonic wave can certainly demodulate wherein contain in atmosphere
Audio signal, form an audio signal with very highly directive.
During audio directional loudspeaker may be mounted at into mobile phone.For motor vehicle operators, it is not necessary to hand-held or wear earphone just
Can converse, be conducive to safe driving；For the user for passing through mobile phone watching video program in public, it is not necessary to wear ear
Machine can just possess good audiovisual experience, without interfering with other people.And among these, traditional raising one's voice is removed in mobile phone
Device, audio directional loudspeaker and mobile phone screen combine to form mobile phone screen orientation sonification system be current mobile phone orientation hair
The research direction with broad prospect of application of sound.
The content of the invention
The present invention is intended to provide a kind of mobile phone screen orientation sonification system, can make mobile phone screen realize orientation sounding, enter
And make mobile phone unitary construction more lightening.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
A kind of mobile phone screen orients sonification system, including：Signal pre-processing module, A/D converter, digital signal modulated mould
Block, power amplifier, load matching network, transparent, oriented transducer, mobile phone display screen curtain；The signal pre-processing module passes through
The A/D converter is connected with the digital signal modulated module；The power amplifier by the load matching network with
The transparent, oriented transducer connection；The digital signal modulated module is connected with the power amplifier；The transparent, oriented
Transducer is located at the mobile phone display screen backstage side, and the transparent, oriented transducer includes piezoelectric vibrator, the piezoelectric vibration
The direction of vibration of device is perpendicular to mobile phone display screen curtain.
Further, the outer of linking effect has been additionally provided between the transparent, oriented transducer and mobile phone display screen curtain
Framework.
Further, the piezoelectric vibrator includes substrate and piezoelectric patches, and the piezoelectric patches is pasted on the substrate.
Further, the digital signal modulated module is carried out in the digital audio and video signals exported to the A/D converter
Before modulation, also the digital audio and video signals are carried out with bandpass filtering, gain amplification, low-frequency compensation and compression amplitude limiting processing.
Preferably, the power amplifier is D-type power amplifier.
Preferably, the digital signal modulated module includes dsp processor or FPGA processor.
The mobile phone screen orientation sonification system that the present invention is provided, digital signal modulated module is set by interior of mobile phone,
The digital audio and video signals are modulated in ultrasonic signal, then realizes that electroacoustic is changed by transparent, oriented transducer, in air
Ultrasonic signal of the transmitting with directive property, due to the aerial nonlinear propagation effects of ultrasonic signal, can finally export fixed
To audio signal.By transparent, oriented transducer be arranged on mobile phone display screen backstage side, by the vibration of piezoelectric vibrator come
Realize sounding so that traditional loudspeaker is no longer needed on mobile phone, mobile phone screen can just be realized orienting sounding, so that mobile phone
Unitary construction it is more lightening, and then meet different user's requests.
Brief description of the drawings
Fig. 1 is the structured flowchart that mobile phone screen of the present invention orients sonification system；
Fig. 2 be ultrasonic directional transducer in mobile phone screen of the present invention orientation sonification system, outer framework, mobile phone display screen act,
The structural representation of circuit board of mobile phone；
Wherein, 1- transparent, orienteds transducer, 2- outer frameworks, 3- mobile phone display screens curtain, 4- circuit board of mobile phone, 5- non-vibrations area
Domain, 6- vibration areas, 7- signal post-processing modules, 8- cell phone mainboards.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing, the present invention is entered
Row is further described.
Fig. 1 is the structured flowchart that mobile phone screen of the present invention orients sonification system.The mobile phone screen orients sonification system, bag
Include：Signal pre-processing module, A/D converter, digital signal modulated module, power amplifier, load matching network, transparent, oriented
Transducer 1, mobile phone display screen curtain 3；The signal pre-processing module passes through the A/D converter and the digital signal modulated mould
Block is connected；The power amplifier is connected by the load matching network with the transparent, oriented transducer 1；The numeral letter
Number modulation module is connected with the power amplifier；The transparent, oriented transducer 1 is located at the lower section of mobile phone display screen curtain 3,
The outer framework 2 of linking effect has been additionally provided between the transparent, oriented transducer 1 and mobile phone display screen curtain 3；It is described transparent
Directional transducer 1 includes piezoelectric vibrator, and the piezoelectric vibrator includes substrate and piezoelectric patches, and the piezoelectric patches is pasted onto described
On substrate, perpendicular to mobile phone display screen curtain 3, mobile phone display screen curtain 3 can be song to the direction of vibration of the piezoelectric vibrator
Face screen, or plane screen, its concrete structure includes：Glassy layer, display module layer, touch sensitive layer, the touch sensible
Layer is located between the glassy layer and display module layer.
As depicted in figs. 1 and 2, in the present invention, transparent, oriented transducer 1 includes vibration area 6 and non-vibration region 5,
Vibration area 6 is piezoelectric vibrator, or electrostatic transparent material.Pass through glue between vibration area 6 and non-vibration region 5
Water is connected.Signal pre-processing module, A/D converter and digital signal modulation module are integrated in cell phone mainboard 8, positioned at mobile phone electricity
The lower section of road plate 4.Power amplifier and load matching network are integrated in signal post-processing module 7, positioned at the bottom of outer framework 2
End, is connected with vibration area 6.
Signal pre-processing module is filtered and down-converted to the audio signal for receiving, and signal then is sent into A/
Data signal is converted analog signals into D converters.The DAB letter that digital signal modulated module is exported to A/D converter
Number loading algorithm is modulated, by digital audio and video signals modulation to ultrasonic signal.In order to solve pulse width modulation
Signal amplitude is smaller and problem of ultrasonic aerial low-frequency effect difference, before ultrasonic modulation is carried out, can be with logarithm
Word audio signal carries out bandpass filtering, gain amplification, low-frequency compensation and compression amplitude limiting processing, due to pulse width modulation structure ratio
Relatively simple, distortion is smaller, thus with good integration and Energy Efficiency Ratio.The digital signal modulated module includes DSP treatment
Device or FPGA processor, the modulator for cell phone platform can be realized by mobile phone CPU, to reduce volume, simplified structure.Power is put
Big device receives the brewed ultrasonic carrier signal of digital signal modulated module output, and the ultrasonic carrier signal is driven
Amplify.Afterwards in the ultrasonic carrier signal after amplification is sent into transparent, oriented transducer 1 by load matching network, it is driven to shake
It is dynamic, and matched by low-pass filter circuit, to launching ultrasonic wave in air.Wherein, the supersonic range part is through air from demodulation
And it is reduced to former audio signal.Because ultrasonic wave has directive property, therefore also have calmly through its audible sound audio for being demodulated
Tropism and form orientation audible sound.Because ultrasonic transducer impedance can greatly promote heating loss thereon in reactive, produce
Bigger acoustic pressure, efficiently completes ultrasonic wave transmitting.Therefore, the transducer making material of selection can for piezoelectric-
Including piezoelectric ceramics, PZT, pvdf membrane, or magnetostriction materials or other piezoelectrics.In the present invention, select
PVDF transparent coatings as transducer material.
Load matching network is used to carry out the impedance between the power amplifier and the transparent, oriented transducer
Match somebody with somebody.Because the load of power amplifier is in capacitive character, therefore when power amplifier and transparent, oriented transducer are attached,
Design a load matching network.Because if not carrying out load matched, the load of transparent, oriented transducer will be in output
The driving lower aprons short circuit of high-frequency signal, can cause to burn the catastrophic effect of component or transducer.In the present invention, load
Matching network can carry out impedance conversion and matching using inductance, lc circuit and transformer etc..In view of required for capacitive load
High power, in order that power amplifier self-heating loss reach minimum, efficiency reaches highest, the power amplifier of the system
From switching mode digital power amplifier, in the present invention, system collection is carried out as design object from D-type power amplifier
Into.
The mobile phone screen orientation sonification system that the present invention is provided, digital signal modulated module is set by interior of mobile phone,
The digital audio and video signals are modulated in ultrasonic signal, then realizes that electroacoustic is changed by transparent, oriented transducer, in air
Ultrasonic signal of the transmitting with directive property, due to the aerial nonlinear propagation effects of ultrasonic signal, can finally export fixed
To audio signal.By transparent, oriented transducer be arranged on mobile phone display screen backstage side, by the vibration of piezoelectric vibrator come
Realize sounding so that other electromagnetic type conventional loudspeakers are no longer needed on mobile phone, mobile phone screen can inherently realize orientation hair
Sound, so that the unitary construction of mobile phone is more lightening, and then meets different user's requests.
In the present embodiment, transparent transducer is located at the center at the mobile phone screen back side, specifically, positioned at display screen 3
The center at the back side.Preferably rectangular, the four edges of the rectangle are respectively parallel to the four edges of display screen 3.
In the present embodiment, the material of piezoelectric membrane is preferably PVDF (Kynoar), or is piezoelectric ceramics.Due to
Piezoelectric membrane is transparent so that mobile phone screen acts not only as display unit, it is also possible to used as sound-producing device, realizes mobile phone screen
Multifunction.
The mobile phone screen sonification system that the present invention is provided, when electric signal is passed through, due to inverse piezoelectric effect, makes piezoelectric membrane
Deformation is produced, so as to mobile phone screen produces driving force, mobile phone screen just can vibration sounding.Raised one's voice with traditional electromagnetic type mobile phone
Device is compared, and its structure is greatly simplified, and then causes that mobile phone is more lightening, meets different consumer demands.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Knowing those skilled in the art can make various corresponding changes and deformation, but these corresponding changes and deformation according to the present invention
The protection domain of appended claims of the invention should all be belonged to.
Claims (6)
1. a kind of mobile phone screen orients sonification system, it is characterised in that including：
Signal pre-processing module, A/D converter, digital signal modulated module, power amplifier, load matching network is transparent fixed
To transducer, mobile phone display screen curtain；The signal pre-processing module passes through the A/D converter and the digital signal modulated mould
Block is connected；The power amplifier is connected by the load matching network with the transparent, oriented transducer；The numeral letter
Number modulation module is connected with the power amplifier；The transparent, oriented transducer is located at the mobile phone display screen backstage side, institute
Stating transparent, oriented transducer includes piezoelectric vibrator, and the direction of vibration of the piezoelectric vibrator is perpendicular to the mobile phone display screen
Curtain.
2. mobile phone screen according to claim 1 orientation sonification system, it is characterised in that the transparent, oriented transducer and
The outer framework of linking effect has been additionally provided between the mobile phone display screen curtain.
3. mobile phone screen according to claim 1 orients sonification system, it is characterised in that the piezoelectric vibrator includes base
Piece and piezoelectric patches, the piezoelectric patches are pasted on the substrate.
4. mobile phone screen according to claim 1 orients sonification system, it is characterised in that the digital signal modulated module
Before the digital audio and video signals exported to the A/D converter are modulated, band logical also is carried out to the digital audio and video signals
Filtering, gain amplification, low-frequency compensation and compression amplitude limiting processing.
5. mobile phone screen according to claim 1 orients sonification system, it is characterised in that the power amplifier is D classes
Power amplifier.
6. mobile phone screen according to claim 1 orients sonification system, it is characterised in that the digital signal modulated module
Including dsp processor or FPGA processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322851.1A CN106937206A (en) | 2017-05-09 | 2017-05-09 | A kind of mobile phone screen orients sonification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710322851.1A CN106937206A (en) | 2017-05-09 | 2017-05-09 | A kind of mobile phone screen orients sonification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106937206A true CN106937206A (en) | 2017-07-07 |
Family
ID=59430040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710322851.1A Pending CN106937206A (en) | 2017-05-09 | 2017-05-09 | A kind of mobile phone screen orients sonification system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979791A (en) * | 2017-11-30 | 2018-05-01 | 惠州市德赛西威汽车电子股份有限公司 | A kind of integrated vibration and acoustic structure for contact panel |
| CN108055412A (en) * | 2017-12-29 | 2018-05-18 | 努比亚技术有限公司 | Control method, mobile terminal and the computer readable storage medium of mobile terminal |
| CN108769868A (en) * | 2018-04-10 | 2018-11-06 | 华南理工大学 | Receiver implementation method and device under Mobile phone screen based on frequency division ultrasonic parameter battle array |
| CN110018809A (en) * | 2019-03-28 | 2019-07-16 | 联想(北京)有限公司 | A kind of electronic equipment and control method |
| CN110933558A (en) * | 2019-12-17 | 2020-03-27 | 京东方科技集团股份有限公司 | Directional sound production method and device, ultrasonic transducer and electronic equipment |
| CN112218209A (en) * | 2019-07-10 | 2021-01-12 | 北京小米移动软件有限公司 | Directional sound production component and mobile terminal |
| CN112788163A (en) * | 2020-12-30 | 2021-05-11 | 维沃移动通信有限公司 | Electronic device |
| CN112911037A (en) * | 2021-01-29 | 2021-06-04 | 维沃移动通信有限公司 | Electronic device |
| CN115243174A (en) * | 2022-08-03 | 2022-10-25 | 苏州清听声学科技有限公司 | Efficient dual-track directional sounding ultrasonic screen and manufacturing process thereof |
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| CN115243174A (en) * | 2022-08-03 | 2022-10-25 | 苏州清听声学科技有限公司 | Efficient dual-track directional sounding ultrasonic screen and manufacturing process thereof |
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