CN103002388B - Multifunctional piezoelectric bone conduction earphone and touch force feedback system integrated with glasses - Google Patents
Multifunctional piezoelectric bone conduction earphone and touch force feedback system integrated with glasses Download PDFInfo
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- CN103002388B CN103002388B CN201210449166.2A CN201210449166A CN103002388B CN 103002388 B CN103002388 B CN 103002388B CN 201210449166 A CN201210449166 A CN 201210449166A CN 103002388 B CN103002388 B CN 103002388B
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Abstract
The invention relates to the technical field of bone conduction earphones and touch force feedback, in particular to a multifunctional piezoelectric bone conduction earphone and touch force feedback system integrated with glasses. The system comprises a glasses frame base body, an integrated piezoelectric driving and force feedback signal processing circuit board, a power supply module, a piezoelectric material, an upper electrode layer, a lower electrode layer and a flexible circuit, wherein the integrated piezoelectric driving and force feedback signal processing circuit board and the power supply module are arranged at the roots of glasses legs, the piezoelectric material is fixed in a groove of one glasses leg, the upper electrode layer and the lower electrode layer are coated on the surface of the piezoelectric material, and the flexible circuit is connected with the electrode layers and the circuit board. The circuit board receives audio signals and applies voltage signals to the electrode layers of the piezoelectric material. By the aid of inverse piezoelectric effect, the piezoelectric material generates vibration identical to sound electric signals in frequency so as to drive the glasses legs to vibrate together, vibration of the glasses legs is transmitted into a human body face contacting with the glasses legs, sound is sensed by auditory nerves of a human body through bone conduction, and accordingly sense of hearing is generated. When the piezoelectric material is subjected to external force, corresponding induction electrical signals are generated and are processed by the circuit board to corresponding feedback touch signals which are used for achieving control functions of function selection, switching and the like.
Description
Technical field
The present invention relates to bone conduction type earphone and touch-control force feedback technique field, be specifically related to a kind of piezoelectricity osophone of the band touch-control force feedback system integrated with glasses.
Background technology
Glasses are also the instruments that modern commonly uses, and not only for correcting defects of vision, and glasses are also with material and artistic combination, embodied the identity, social status, concept, hobby etc. of wearer by tangible mode.According to relevant statistics, by 2008, Chinese hypometropia have 2.6 hundred million people; In addition, the eye illnesses such as long sight, amblyopia, astigmatism all need wearing spectacles, sunglasses, light-sensitive glasses, are even also more and more subject to liking of people without Sunglasses such as lens glasses.
Along with the progress of science and technology and the raising of people's living standard, earphone becomes requisite consumer electronics in people's daily life.Earphone is mainly divided into ear type, In-Ear, wear-type, ear suspension type, along with the development of science and technology, has occurred again bluetooth earphone.Bluetooth technology is applied in hands-free headsets by bluetooth earphone exactly, allow user can exempt impeding of irritating electric wire, easily converse in every way comfortablely, listen to the music, because the head of people is away from electronic equipment, electromagnetic radiation can also be avoided the impact of human health.But bluetooth earphone still cannot avoid the connectivity problem with people's ear, and connected mode is still nothing more than ear type, In-Ear, wear-type, and ear suspension type etc. are several.But, because this traditional earphone wearing mode is more stiff, wear the earphone of this traditional wearing mode for a long time unavoidably to the sense that people is tired and uncomfortable.Because glasses are ears and the support of bridge of the nose bikini, ear only plays the effect of supplemental support, so the wear glasses fatigue and discomfort that cause are well below earphone.
GOOGLE Inc. of the U.S. once issued and was aly referred to as Project Glass circulating type glasses at the beginning of 2012.Information can be sent to eyeglass by these glasses, and allows wearing user to be received and sent messages by Sound control.These glasses also have a built-in camera, can carry out video record and photograph taking.The technology of this patent is applied in similar product and can provides audio frequency support in the glasses that video support is provided simultaneously, realize multi-media communication truly.
Piezoelectric is a kind very special material, and when piezoelectric crystal or piezoelectric are subject to external force and deformation occurs, occur on the surface and external force charge accumulation linearly in it some, this phenomenon is called piezoelectric effect.And when piezoelectric crystal or piezoelectric are subject to the effect of external electric field, piezoelectric crystal or piezoelectric result from the linear mechanical deformation of electric field strength, this phenomenon is called inverse piezoelectric effect.Due to these characteristics of piezoelectric, it has started to be applied in loud speaker and touch screen technology.
The vibration of sound wave, is delivered to auditory nerve by two kinds of paths, and one is gas conduction, and this is also the path had comparative advantage under normal circumstances; Another is osteoacusis, insignificant to the formation of the sense of hearing under normal conditions.Osteoacusis has got around external ear and middle ear, and sound wave directly imports inner ear into through skull, has portable and squash type two kinds of modes, and the two is worked in coordination with can stimulate spiral organ to cause the sense of hearing.
Bone conduction passage:
Sound wave → skull → osseous labyrinth → inner ear lymph liquid → spiral organ → auditory nerve → cerebral cortex auditory center.
Current osteoacusis product and human body contact portion have many, as tooth, shoulder, otica, hindbrain, mastoid process etc.
Be standard with regard to operation principle, main flow bone-conduction speaker can be divided into three major types, electromagnetic type, piezoelectric type and magnetostriction type,
Up to now, the electromechanical transducer of bone-conduction device mainly electromagnetic type, primary structure is yoke, voice coil loudspeaker voice coil, magnet and vibrating membrane.Apply the principle identical with electrodynamic loudspeaker, the actuating force produced by the interaction between the electric current of coil and magnet is changed into mechanical oscillation.But the dynamo-electric converter of electromagnetic type has the shortcoming of the low and low frequency region output level deficiency of transformation efficiency.
Piezoelectric type electromechanical transducer, acoustic vibration generating element is single (two) piezoelectric chip element, is made up of metallic plate and bonding piezoelectric board thereon.Because mechanical oscillation are by voltage but not the piezoelectric deforming that causes of electric current drives, therefore the Joule heat loss that electromagnetic type coil produces can not be attended by.In addition, owing to not needing metal parts (magnet and yoke), can realize lightweight thin with profile.
Patent CN1656849A (2003.5.27, Japan TEMCO, electromagnetic type) disclose a kind of electromagnetic type bone conduction loud speaker, via the locking structure above the rising portions being located at yoke periphery and on oscillating plate, oscillating plate is fixed on above rising portions, thus fully guaranteeing the number of turns of voice coil loudspeaker voice coil, under the prerequisite that can not lower efficiency, integrally path can be formed, fully the small form factor requirements such as portable phone can be met.
Patent CN1627864A ((2004.12.1, Japan NEC, piezoelectric type) disclose a kind of piezoelectric type bone conduction speaker, as the piezoelectric ceramic piezoelectric board that single piezoelectric chip element of acoustic vibration element comprises metallic plate and bonds on it, in order to improve frequency response, cover silicon rubber flexible material on piezoelectric element surface.
Although the electromagnetic type bone conduction loud speaker extensive use that patent CN1656849A proposes, its shortcoming is also obvious, and as when electric current is by coil, the resistance of coil can inevitable produce power loss.Therefore, most of energy that power supply provides, as joule's heat energy, consumes on coil, and only has the energy of 1% to be used as acoustic energy.In addition, in low frequency range, because impedance is low, so electric current can be too high, thus the load of power supply is increased.As a result, audio output level is inevitably limited in low frequency region.Like this, at low frequency region, audio output level is not enough.
The piezoelectricity bone conduction device that patent CN1627864A proposes has high impedance and high input voltage, and resonance frequency is higher, makes the reproduction of low frequency region insufficient; In addition, because the mechanical quality factor of vibrational system is very high, the generation vibrated on a specific frequency is reinforced or weakens.Thus naturally normally can not perform audio reproduction.
In order to better reduce the resonance frequency of system, needing the length increasing the vibrational system that piezoelectric element is formed, increasing the compliance (also namely reducing bending modulus K) of system.Based on this, this patent proposes the new construction temple of piezoelectric element and glasses being integrated into bone conduction speaker.Utilize the slim-lined construction of the temple of glasses, as the carrier of piezoelectric element, the resonance frequency of system can well be reduced, improve the sound equipment replaying effect of low frequency part.Meanwhile, utilize the contact at leg of spectacles and human body head especially mastoid process of temporal bone position, the osteoacusis under low-loss can be realized very well.And, coordinate special piezoelectric element driving circuit, the power consumption of the piezoelectricity bone conduction earphone that this patent realizes is only 10% ~ 20% of conventional electromagnetic bone conduction earphone, under the identical operating time, the capacity of battery compartment can be reduced, be conducive to the lightweight and the miniaturization that realize entire glasses.
By the piezoelectric effect of piezoelectric, when there is applied external force and being applied to piezoelectric element surperficial, the accumulation of electric charge will be produced on two of piezoelectric element not coplanar, coating-forming voltage signal.
Be published on March 19th, 2002, United States Patent application (inertia/acoustic elements and structure-INERTIAL/AUDIO UNIT AND CONSTRUCTION thereof) that application number is US6359371B1 provides a kind of structure, this combination unit comprises the element (as piezoelectricity or ferroelectric material) that can convert electrical signals to vibration signal, and vibrator is connected with the housing of its application and vibration is reached housing makes hull vibration; External pressure also can be converted to the signal of telecommunication thus realize switch and controlling functions by synchronous signal unit.
But the system involved by this patent can only realize simple switching signal, and vibration signal; Audio playback and the touch-control relevant to the pressure size power-signal of telecommunication that cannot realize broadband are changed.
Summary of the invention
The object of the invention is the deficiency in view of prior art, propose a kind of piezoelectricity osophone of the band touch-control force feedback system integrated with glasses pointedly.
This system comprises spectacle-frame matrix, also comprises:
Be fixed on the integrated form Piezoelectric Driving of the leg of spectacles root of spectacle-frame matrix and force feedback signal treatment circuit plate and supply module (as lithium battery);
Be fixed on the piezoelectric in leg of spectacles groove;
Be coated on upper electrode layer and the lower electrode layer of piezoelectric material surface;
Connect the flexible circuit of upper electrode layer, lower electrode layer and integrated form Piezoelectric Driving and force feedback signal treatment circuit plate;
Integrated form Piezoelectric Driving and force feedback signal treatment circuit plate by received audio signal, and apply voltage signal by flexible circuit to the upper electrode layer of piezoelectric and lower electrode layer; Due to inverse piezoelectric effect, piezoelectric occurs with the sound signal of telecommunication with vibration frequently, and then drives leg of spectacles to vibrate together, and the human body face (as mastoid process of temporal bone) contacted with it is imported in the vibration of leg of spectacles into, sound by the auditory nerve perception of people, produces sense of hearing by osteoacusis.Described piezoelectric is when by external force (or passing through the pressure of leg of spectacles surface particles button transmission), corresponding electrical signal of reaction can be produced, this signal built-in integrated circuit that can be connected on frame is treated to corresponding force feedback touching signals, for controlling functions such as practical function selection and switchings.
In order to the signal and force feedback testing circuit signal that realize drive circuit share one group of signal link; Block isolating circuit (as capacitance) can be passed through the AC signal (20Hz ~ 20kHz) for driving is delivered to piezoelectric.And signal monitoring circuit judges to apply key press on the piezoelectric materials by direct current biasing in signal lines (when piezoelectric pressurized, can produce different DC offset voltages because of compression degree), thus realize the parsing to control command.
Described piezoelectric be ceramic-like materials as PZT, or piezoelectricity high-molecular organic material is as PVDF thin film.
Described upper electrode layer is piecemeal or the partitioned organization of bar shaped or rectangular array distribution, and bar shaped can be the strip of rule or the bending bar shaped adapted with leg of spectacles profile; The position of piecemeal or zoning arrangement upper electrode layer perception finger contact power, intensity, time value information, and be arranged respectively to different functional areas, such as play/suspend, upper one is first, and next, increase volume, reduces volume.
Described piezoelectric is single or multiple lift composite construction; Wherein, described multi-layer compound structure adopts the bonding formation multilayer of monolayer material, or adopts low temperature co-fired technology directly to form sandwich construction.
The leg of spectacles groove of described placement piezoelectric arranges upper cover.
On the leg of spectacles that described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate and piezoelectric are positioned at the same side or lay respectively on two legs of spectacles.
Between described piezoelectric with spectacle-frame matrix by welding, inlay, in-mould injection or glue bonding mode realize being mechanically connected, thus the mechanical oscillation deformation produced by piezoelectric be delivered to whole leg of spectacles.
Described flexible circuit is silver conductive adhesive, lead-in wire, FPC or flexible circuit, and its contact resistance is less than 5 ohm.
Described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate share one group of holding wire and realize driving and signal testing function.
Comprise in described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate wired or wireless (as bluetooth, WIFI etc.) audio interface by and control command sending function module.
Described glasses, include but not limited to the glasses of following kind: near-sighted glasses, presbyopic glasses, sunglasses, goggles, and have the glasses series products of projection Presentation Function.
Beneficial effect of the present invention is:
Inherit the function of glasses and earphone, space availability ratio is high, and externally interference is low, structure is simple, cost is low, volume is little, comfortable wearing, has the market competitiveness.
By the mode of blockette, the button of multiple function can be set; Press electric device by structure button pressure and can produce corresponding electric impulse signal, the function of realizing circuit switches.Meanwhile, the cantilever design that the temple of patent and piezoelectric element are formed, has splendid linear; Also namely can by the size of the direct reaction pressure of height of electrical signal voltage.This will enrich the touch controllable function of button greatly, realizes the Analog control function of the similar gas depth.This can realize the continuous and smooth-going zoom in/out function of image in the projection video glasses possessing image control.
Accompanying drawing explanation
Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c) are respectively the schematic diagram of embodiment 1, partial enlarged drawing and cutaway view;
Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) are respectively the schematic diagram of embodiment 2, partial enlarged drawing and cutaway view;
Number in the figure:
1-spectacle-frame matrix; 2-integrated form Piezoelectric Driving and force feedback signal treatment circuit plate; 3-piezoelectric; 4-upper electrode layer; 5-lower electrode layer; 6-flexible circuit; 7-upper cover.
Embodiment
The invention provides a kind of piezoelectricity osophone of the band touch-control force feedback system integrated with glasses, illustrate that the present invention will be further described with embodiment below in conjunction with accompanying drawing.
Embodiment 1
Fig. 1 (a), Fig. 1 (b) and Fig. 1 (c) is the schematic diagram of the embodiment of the present invention 1 respectively, partial enlarged drawing and cutaway view, integrated form Piezoelectric Driving and force feedback signal treatment circuit plate 2 are fixed on the leg of spectacles root position of spectacle-frame matrix 1 with the glue such as AB glue or screw, piezoelectric 3 glue such as AB glue are fixed on leg of spectacles groove medium position, upper electrode layer 4 and lower electrode layer 5 are coated on piezoelectric 3 surface, flexible circuit 6 connects upper electrode layer 4, lower electrode layer 5 and integrated form Piezoelectric Driving and force feedback signal treatment circuit plate 2, leg of spectacles groove has upper cover 7, for isolating and protecting piezoelectric 3.
The driving circuit section of integrated form Piezoelectric Driving and force feedback signal treatment circuit plate 2 adopts special piezoelectric driving circuit TI-TPA2100P1, this kind of chip can use the powered battery of 2.5V ~ 5.5V, provides the output signal being up to 19Vpp to drive piezoelectric.AC signal is delivered on piezoelectric 3 by block isolating circuit (as capacitance) by the signal of drive circuit.And signal monitoring circuit judges to apply key press on the piezoelectric materials by direct current biasing in signal lines (when piezoelectric pressurized, can produce different DC offset voltages because of compression degree), thus realize the parsing to control command.The charge amplifying circuit that force feedback signal treatment circuit plate uses AD823 to build can complete.
For obtaining flexible and reduction driving voltage (driving voltage that use is no more than 20Vpp is safer for human body) preferably, piezoelectric 3 selects that 0.1mm is thick, 5 layers of PZT pottery (every layer thickness is 20um), ceramic width is of a size of 2mm, long 30mm.For improving drive efficiency, ceramic material should choose the higher material of d31 coefficient.
Flexible circuit 6 adopts silver conductive adhesive, and for ensureing the reliability driven, contact resistance should be less than 5 ohm; Another kind of connected mode uses conduction network cloth material (as TESA conductive strips) upper electrode layer 4, lower electrode layer 5 and integrated form Piezoelectric Driving to be directly connected with force feedback signal treatment circuit plate 2.
Integrated form Piezoelectric Driving and force feedback signal treatment circuit plate 2 by received audio signal, and apply voltage signal by flexible circuit 6 to the upper electrode layer 4 of piezoelectric 3 and lower electrode layer 5; Due to inverse piezoelectric effect, piezoelectric 3 occurs with the sound signal of telecommunication with vibration frequently, and then drives leg of spectacles to vibrate together, and the human body face contacted with it is imported in the vibration of leg of spectacles into, and sound by the auditory nerve perception of people, produces sense of hearing by osteoacusis; Piezoelectric 3, when by external force, produces corresponding electrical signal of reaction, is treated to corresponding force feedback touching signals by integrated form Piezoelectric Driving and force feedback signal treatment circuit plate 2, for controlling functions such as practical function selection and switchings.
Embodiment 2
Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) are the schematic diagram of the embodiment of the present invention 2, partial enlarged drawing and cutaway view respectively, its difference in embodiment 1 is, described upper electrode layer 4 is bar shaped partitioned organizations, comprise 4a, 4b, 4c tri-subregions, this configuration of electrodes can the information such as position, intensity, time value of perception finger contact power, every cube electrode can be arranged to different functional areas, such as play/suspend, upper one is first, next, increase volume, reduce volume etc.
Be more than preferably embodiment of the present invention, those skilled in the art can make any amendment in the scope that claim specifies.
Claims (8)
1. a piezoelectricity osophone for the band touch-control force feedback system integrated with glasses, comprise spectacle-frame matrix (1), it is characterized in that, this system also comprises:
Be fixed on the integrated form Piezoelectric Driving of the leg of spectacles root of spectacle-frame matrix (1) and force feedback signal treatment circuit plate (2) and supply module, the driving circuit section of described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2) adopts special piezoelectric driving circuit TI-TPA2100P1;
Be fixed on the piezoelectric (3) in leg of spectacles groove; Described piezoelectric (3) is single or multiple lift composite construction; Wherein, described multi-layer compound structure adopts 5 layers of PZT ceramic bonding to form, and the thickness of every layer of PZT pottery is 20um, or adopts low temperature co-fired technology directly to form sandwich construction;
Be coated on upper electrode layer (4) and the lower electrode layer (5) on piezoelectric (3) surface,
Connect the flexible circuit (6) of upper electrode layer (4), lower electrode layer (5) and integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2); The contact resistance of flexible circuit (6) is less than 5 ohm;
Integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2) by received audio signal, and by flexible circuit (6) to the upper electrode layer (4) of piezoelectric (3) and lower electrode layer (5) applying voltage signal; Due to inverse piezoelectric effect, piezoelectric (3) occurs with the sound signal of telecommunication with vibration frequently, and then drives leg of spectacles to vibrate together, and the human body face contacted with it is imported in the vibration of leg of spectacles into, sound by the auditory nerve perception of people, produces sense of hearing by osteoacusis; Piezoelectric (3), when by external force, produces corresponding electrical signal of reaction, is treated to corresponding force feedback touching signals by integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2), selects and handoff functionality for practical function.
2. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, it is characterized in that, described upper electrode layer (4) for bar shaped or rectangular array distribution piecemeal or partitioned organization, piecemeal or zoning arrangement upper electrode layer (4) are arranged respectively to different functional areas, are used for the position of perception finger contact power, intensity, time value information.
3. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, is characterized in that, the leg of spectacles groove of described placement piezoelectric (3) arranges upper cover (7).
4. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, it is characterized in that, described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2) are positioned on the leg of spectacles of the same side with piezoelectric (3) or lay respectively on two legs of spectacles.
5. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, it is characterized in that, between described piezoelectric (3) with spectacle-frame matrix (1) by welding, inlay, in-mould injection or glue bonding mode realize being mechanically connected, thus the mechanical oscillation deformation produced by piezoelectric be delivered to whole leg of spectacles.
6. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, is characterized in that, described flexible circuit (6) is silver conductive adhesive, lead-in wire, FPC or flexible circuit.
7. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, it is characterized in that, described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2) share one group of holding wire and realize driving and signal testing function.
8. the piezoelectricity osophone of a kind of band touch-control force feedback system integrated with glasses according to claim 1, it is characterized in that, comprise wired or ANTENN AUDIO in described integrated form Piezoelectric Driving and force feedback signal treatment circuit plate (2) and accept and control command sending function module.
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103207460B (en) * | 2013-04-11 | 2015-09-09 | 青岛歌尔声学科技有限公司 | A kind of 3D glasses and preparation method thereof |
| CN103369440B (en) * | 2013-08-01 | 2016-08-10 | 广东欧珀移动通信有限公司 | A kind of piezoelectric bone conduction receiver mobile phone |
| CN103529565A (en) * | 2013-10-22 | 2014-01-22 | 西安康弘新材料科技有限公司 | Installation structure of piezoelectric ceramic bone conductive vibrators in glasses |
| CN103984122A (en) * | 2014-06-06 | 2014-08-13 | 万新光学集团有限公司 | Snore-stopping and sleeping-aiding spectacles |
| CN104469632B (en) * | 2014-11-28 | 2018-02-02 | 华勤通讯技术有限公司 | A kind of vocal technique and sound-producing device |
| DE102016122977B4 (en) * | 2016-11-29 | 2021-09-02 | Preh Gmbh | Operating device with several operating assemblies and haptic feedback as well as method for manufacturing the operating 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 |
| CN107942536B (en) * | 2017-11-28 | 2019-03-05 | 苏州佑克骨传导科技有限公司 | A kind of sunglasses with bone conduction earphone |
| CN108966068A (en) * | 2018-06-21 | 2018-12-07 | 苏州佳世达电通有限公司 | Earphone and electronic device engaged therewith |
| WO2021000113A1 (en) * | 2019-06-29 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Wearable eyeglasses and touch-control interaction method therefor |
| CN111601228B (en) * | 2020-07-03 | 2022-07-19 | 佛山博智医疗科技有限公司 | Adjustable audiometric earphone installation system |
| CN114449417B (en) * | 2020-10-30 | 2022-11-25 | 华为技术有限公司 | Speaker and electronic equipment |
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| JP5742415B2 (en) * | 2011-04-14 | 2015-07-01 | セイコーエプソン株式会社 | Sensor device, force detection device and robot |
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| CN101753221A (en) * | 2008-11-28 | 2010-06-23 | 新兴盛科技股份有限公司 | Butterfly temporal bone conductive communication and/or hear-assisting device |
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