WO2020107621A1 - 表面发声装置以及电子设备 - Google Patents

表面发声装置以及电子设备 Download PDF

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Publication number
WO2020107621A1
WO2020107621A1 PCT/CN2018/124944 CN2018124944W WO2020107621A1 WO 2020107621 A1 WO2020107621 A1 WO 2020107621A1 CN 2018124944 W CN2018124944 W CN 2018124944W WO 2020107621 A1 WO2020107621 A1 WO 2020107621A1
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WIPO (PCT)
Prior art keywords
connecting element
exciter
screen
protective layer
electronic device
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Application number
PCT/CN2018/124944
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English (en)
French (fr)
Inventor
杨鑫峰
祖峰磊
Original Assignee
歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Priority to US17/297,518 priority Critical patent/US11937060B2/en
Publication of WO2020107621A1 publication Critical patent/WO2020107621A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028—Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13336—Combining plural substrates to produce large-area displays, e.g. tiled displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133391—Constructional arrangement for sub-divided displays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133394—Piezoelectric elements associated with the cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • 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
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/07—Loudspeakers using bending wave resonance and pistonic motion to generate sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms

Definitions

  • the present invention relates to the technical field of electroacoustic conversion, and more particularly, to a surface sound emitting device and electronic equipment.
  • the conventional screen sounding device or panel sounding device usually includes one or more exciters.
  • the exciter is installed on a screen or panel for sound production, or directly on a fixed frame of an electronic device such as a mobile phone.
  • the exciter itself has a certain deformation or displacement, thereby driving the screen or panel to produce deformation or displacement, thereby achieving sound radiation.
  • the loudness of sound radiation is closely related to the driving force of vibration, the area of radiation, and the quality of vibration. Using the entire sound of the screen or panel increases the area of radiation. But when the radiation area increases, the vibration quality will increase, which requires a greater driving force to drive. This will increase the power of the exciter and increase the cost of the sounding device.
  • An object of the present invention is to provide a new technical solution for a surface sound emitting device.
  • a surface sound emitting device includes an exciter, a vibrating portion, and a connecting element.
  • the connecting element has a sheet-like structure.
  • the vibrating portion is provided on the connecting element.
  • the edge of the connecting element is used to connect with other parts of the surface of the electronic device, the connecting element and other parts of the surface together form the surface, the connecting element is configured to provide an elastic restoring force, the The exciter is configured to provide driving force.
  • the area of the connecting element is larger than the area of the side of the vibrating portion for connecting to the connecting element, and the vibrating portion is provided in the middle of the connecting element so that the connecting element Form a ring-shaped edge.
  • the outer surface of the connecting element is flush with other parts of the surface.
  • the exciter includes a piezoelectric exciter, a moving coil exciter, a moving iron exciter, a moving magnetic exciter, or a magnetostrictive exciter.
  • the material of the connecting element is a polymer material.
  • the Young's modulus of the connecting element is less than or equal to 6080 MPa, and the density is less than or equal to 1130 kg/m 3 .
  • an electronic device includes a casing and a screen connected to the casing, and a mounting hole is formed on the casing or the screen, the casing or the screen is other parts of the surface, and is used to enclose
  • the housing part or the screen part of the mounting hole is a connecting part, and the above-mentioned surface sound emitting device is provided in the mounting hole, and the connecting element is connected to the connecting part.
  • a concave annular step structure is provided on the connecting portion, and the connecting element is embedded in the annular step structure.
  • the elastic coefficient of the connecting element is smaller than the elastic coefficient of the housing or the screen.
  • the mounting hole is provided on the screen
  • the screen includes a first liquid crystal screen and a first transparent protective layer provided on the outside of the first liquid crystal screen
  • the connecting element is a second transparent Protective layer
  • the vibration part is a second liquid crystal screen
  • the elastic coefficient of the second transparent protective layer is smaller than that of the first transparent protective layer
  • the first transparent protective layer and the second transparent protective layer Connection the first liquid crystal screen and the second liquid crystal screen are used together for image display.
  • the exciter vibrates and drives the vibrating portion to vibrate, thereby directly radiating sound outward.
  • the vibration direction is perpendicular to the main surface of the vibration part, for example, front or back.
  • the vibrating part vibrates as a part of the surface, rather than the entire one-sided surface, so that the surface sound generating device has a small radiation area, the driving force required for vibration is reduced, and the exciter required for vibration power.
  • FIG. 1 is a cross-sectional view of an electronic device according to an embodiment of the present disclosure.
  • FIG. 2 is a partially enlarged view of FIG. 1.
  • FIG. 3 is a cross-sectional view of an electronic device according to another embodiment of the present disclosure.
  • FIG. 3 is a front view of an electronic device according to another embodiment of the present disclosure.
  • a surface sound emitting device is provided. As shown in FIGS. 1-2, the surface sound emitting device includes an exciter 14, a vibrating portion 13, and a connecting element 15.
  • the connecting element 15 has a sheet structure.
  • the vibration part 13 is provided on the connection element 15.
  • the exciter 14 is provided on the vibration part 13.
  • the edge of the connecting element 15 is used to connect with other parts 18 of the surface of the electronic device, such as the housing 11 and/or the screen.
  • the connecting element 15 and the other parts 18 of the surface together constitute the surface of the electronic device.
  • the connecting element 15 is configured to provide an elastic restoring force to restore the vibration part 13 to the initial position.
  • the exciter 14 is configured to provide a driving force to cause the vibration part 13 to deviate from the initial position and vibrate.
  • the vibrating portion 13 has a sheet-like structure, which may be a circular sheet-like shape, a rectangular sheet-like shape, or a racetrack-like sheet-like shape.
  • the sound effect of the lamella structure is good.
  • the vibration part 13 is provided between the exciter 14 and the connection element 15.
  • the connecting element 15 covers one surface of the actuator 14.
  • the exciter 14 is bonded to the middle of the vibration part 13 by an adhesive or double-sided tape, and the vibration part 13 is bonded to the connection element 15.
  • the vibration direction of the exciter 14 is perpendicular to the main surface of the vibration part 13.
  • the vibration part 13 uses an inorganic non-metallic material, a metal material, or a polymer material.
  • the Young's modulus of the vibrating portion 13 is 2000 MPa or more, and the density is 2.7 g/cm 3 or less.
  • the vibrating portion 13 within this range has the characteristics of high structural strength and light weight, can effectively reduce the divided vibration of the surface sound generating device, and requires a small driving force when vibrating.
  • the exciter 14 includes a piezoelectric exciter 14, a moving coil exciter 14, a moving iron exciter 14, a moving magnetic exciter 14, or a magnetostrictive exciter 14.
  • the exciter 14 is fixed to the central position of the vibrating portion 13 by adhesive or double-sided tape.
  • the exciter 14 receives an electric signal of an external circuit, so that vibration occurs.
  • the exciter 14 causes the vibration part 13 to vibrate, thereby radiating sound outward.
  • the connecting element 15 has elasticity, so that the vibration part 13 returns to the initial position.
  • the material of the connection element 15 is a polymer material.
  • Polymer materials include PI, PP, PEN, PPT and other materials. All of the above materials can provide elastic restoring force.
  • the connecting element 15 has a sheet-like structure, for example, a circular sheet-like shape, a rectangular sheet-like shape, or a track-like sheet-like shape. Since the connection element 15 is located on the surface of the electronic device after the assembly is completed, the sheet-like structure can maintain the appearance of the electronic device.
  • the Young's modulus of the connecting element 15 is less than or equal to 6080 MPa, and the density is less than or equal to 1130 kg/m3.
  • the connecting element 15 in this ratio range has the characteristics of good elasticity and light weight.
  • the connecting element 15 can also play a role of dustproof, waterproof and so on.
  • the exciter 14 vibrates and drives the vibrating portion 13 to vibrate, thereby directly radiating sound outward.
  • the vibration direction is perpendicular to the main surface of the vibration part 13.
  • the vibrating part 13 vibrates as a part of the surface, rather than the entire one-sided surface, so that the surface sound generating device has a smaller radiation area, the driving force required for vibration is reduced, and the excitation required for the vibrating part 13 to vibrate The power of ⁇ 14.
  • the mass of the vibration portion 13 is reduced, the electroacoustic conversion efficiency is significantly improved, and the vibration sensitivity is significantly improved.
  • the area of the connecting element 15 is larger than the area of the side of the vibrating portion 13 for connecting to the connecting element 15.
  • the vibration part 13 is provided in the middle of the connection element 15 to form an annular edge 12 on the connection element 15.
  • the annular edge 12 is connected to the other parts 18 of the surface.
  • the annular edge 12 increases the contact area of the connecting element 15 so that the connecting element 15 is more firmly connected to the other parts 18 of the surface.
  • the outer surface of the connecting element 15 is flush with the rest of the surface 18. This arrangement makes the electronic device look good.
  • an electronic device As shown in FIGS. 1-4, the electronic device includes a housing 11 and a screen connected to the housing 11. Mounting holes are formed in the housing 11 or the screen. The housing 11 or the screen is the other part 18 of the surface. The portion of the housing 11 or the screen portion intended to enclose the mounting hole is the connecting portion. The above-mentioned surface sound generating device is provided in the mounting hole.
  • the connecting element 15 is connected to the connecting portion. For example, the edge of the connecting element 15 is adhered to the connecting portion by double-sided tape or adhesive.
  • the exciter 14 forms a gap with the hole wall of the mounting hole to prevent the hole wall from interfering with the exciter 14.
  • a concave ring-shaped step structure 23 is provided at the connection portion.
  • the connecting element 15 is embedded in the annular step structure 23.
  • An annular step structure 23 is provided around the mounting hole.
  • the annular edge 12 is embedded in the annular step structure 23.
  • the annular step structure 23 can play a positioning role, which makes the connection position of the connection element 15 more accurate.
  • the elastic coefficient of the connecting element 15 is smaller than the elastic coefficient of the housing 11 or the screen. This arrangement can reduce the influence of the elastic deformation of the housing 11 or the screen on the vibration of the surface sound-generating device, so that the sound-generating effect of the surface sound-generating device is better.
  • mounting holes are provided on the screen.
  • the screen includes a first liquid crystal screen 16 and a first transparent protective layer 21 disposed outside the first liquid crystal screen 16.
  • the outside refers to the side away from the inner cavity of the electronic device.
  • the first liquid crystal screen 16 and the first transparent protective layer 21 are arranged in parallel.
  • the connecting element 15 is the second transparent protective layer 22.
  • the vibration unit 13 is a second liquid crystal panel 17.
  • the second transparent protective layer 22 is disposed in parallel with the second liquid crystal screen 17.
  • the elastic coefficient of the second transparent protective layer 22 is smaller than the elastic coefficient of the first transparent protective layer 21.
  • the first transparent protective layer 21 is connected to the second transparent protective layer 22.
  • the first liquid crystal screen 16 and the second liquid crystal screen 17 are used together for image display.
  • the first liquid crystal screen 16 and the second liquid crystal screen 17 are LED screens or LCD screens.
  • first transparent protective layer 21 and the second transparent protective layer 22 may be bonded together by double-sided tape or adhesive. It may also be that the first transparent protective layer 21 and the second transparent protective layer 22 are integrally formed transparent materials. A softening treatment is performed on a part of the transparent material to reduce the elastic coefficient, thereby forming the second transparent protective layer 22. The portion other than the second transparent protective layer 22 is the first transparent protective layer 21.
  • the softening method includes thinning the second transparent protective layer 22 so that the thickness of the second transparent protective layer 22 is smaller than the thickness of the first transparent protective layer 21.
  • the smaller thickness can reduce the elastic coefficient of the second transparent protective layer 22, so that the vibration effect of the vibration portion 13 is better.
  • a part of the screen is used for vibration sound, not the entire screen for sound sound.
  • the direction of sound radiation is toward the user, so that the user's listening effect is better.
  • the surface sound-generating device is used as a part of the screen to display the image, which makes the image and sound cooperate more smoothly.
  • the electronic device is provided with multiple surface sounding devices. Multiple surface sound emitting devices radiate sound in different directions to form a stereo effect. This makes the sound effect of electronic equipment more excellent.

Abstract

本发明公开了一种表面发声装置以及电子设备。该表面发声装置包括激励器、振动部和连接元件，所述连接元件呈片状结构，所述振动部被设置在所述连接元件上，所述激励器被设置在所述振动部上，所述连接元件的边缘用于与电子设备的表面的其他部分连接，所述连接元件与所述表面的其他部分共同构成所述表面，所述连接元件被配置为用于提供弹性回复力，所述激励器被配置为用于提供驱动力。

Description

表面发声装置以及电子设备 技术领域
本发明涉及电声转换技术领域，更具体地，涉及一种表面发声装置以及电子设备。
背景技术
传统的屏幕发声装置或者面板发声装置通常包括一个或多个激励器。激励器安装在用于发声的屏幕或者面板上，或者直接安装在手机等电子设备的固定框架上。激励器自身发生一定的形变或者位移，从而带动屏幕或者面板产生形变或者位移，从而实现声辐射。
声辐射的响度与振动的驱动力、辐射面积、振动质量三者密切相关，采用屏幕或者面板整体发声提高了辐射面积。但辐射面积增加的同时，振动质量的也会增加，这就需要有更大的驱动力进行驱动。这样会提高激励器的功率，提高了发声装置的成本。
此外，更大功率的激励器具有更大的体积，这样不利于电子设备的小型化设计。
因此，需要提供一种新的技术方案，以解决上述技术问题。
发明内容
本发明的一个目的是提供一种表面发声装置的新技术方案。
根据本发明的第一方面，提供了一种表面发声装置。该表面发声装置包括激励器、振动部和连接元件，所述连接元件呈片状结构，所述振动部被设置在所述连接元件上，所述激励器被设置在所述振动部上，所述连接元件的边缘用于与电子设备的表面的其他部分连接，所述连接元件与所述表面的其他部分共同构成所述表面，所述连接元件被配置为用于提供弹性回复力，所述激励器被配置为用于提供驱动力。
可选地，所述连接元件的面积大于所述振动部的用于与所述连接元件连接的一侧的面积，所述振动部被设置在所述连接元件的中部，以在所述连接元件上形成环形边缘。
可选地，所述连接元件的外表面与所述表面的其他部分相平齐。
可选地，所述激励器包括压电式激励器、动圈式激励器、动铁式激励器、动磁式激励器或磁致伸缩式激励器。
可选地，所述连接元件的材质为高分子材料。
可选地，所述连接元件的杨氏模量小于或等于6080Mpa，密度小于或等于1130kg/m 3。
根据本公开的另一个实施例，提供了一种电子设备。该电子设备包括壳体和与所述壳体连接的屏幕，在所述壳体或者屏幕上形成有安装孔，所述壳体或者所述屏幕为所述表面的其他部分，计用于围成所述安装孔的壳体部分或者屏幕部分为连接部，在所述安装孔内设置有上述表面发声装置，所述连接元件与所述连接部连接。
可选地，在所述连接部设置有下凹的环形台阶结构，所述连接元件嵌入所述环形台阶结构中。
可选地，所述连接元件的弹性系数小于所述壳体或者所述屏幕的弹性系数。
可选地，在所述屏幕上设置有所述安装孔，所述屏幕包括第一液晶屏以及设置在所述第一液晶屏的外侧的第一透明保护层，所述连接元件为第二透明保护层，所述振动部为第二液晶屏，所述第二透明保护层的弹性系数小于所述第一透明保护层的弹性系数，所述第一透明保护层与所述第二透明保护层连接，所述第一液晶屏与所述第二液晶屏共同用于图像显示。
根据本公开的一个实施例，激励器振动并带动振动部振动，从而直接向外辐射声音。振动方向垂直于振动部的主表面，例如正面或者背面。振动部作为所在表面的一部分进行振动，而不是整个单侧表面进行振动，这样表面发声装置具有较小的辐射面积，振动时需要的驱动力降低，并且降低了振动部振动所需要的激励器的功率。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其 它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是根据本公开的一个实施例的电子设备的剖视图。
图2是图1的局部放大图。
图3是根据本公开的另一个实施例的电子设备的剖视图。
图3是根据本公开的另一个实施例的电子设备的主视图。
附图标记说明：
11：壳体；12：环形边缘；13：振动部；14：激励器；15：连接元件；16：第一液晶屏幕；17：第二液晶屏幕；18：表面的其他部分；21：第一透明保护层；22：第二透明保护层；23：环形台阶结构。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
根据本公开的一个实施例，提供了一种表面发声装置。如图1-2所示， 该表面发声装置包括激励器14、振动部13和连接元件15。连接元件15呈片状结构。振动部13被设置在连接元件15上。激励器14被设置在振动部13上。连接元件15的边缘用于与电子设备的表面的其他部分18连接，例如壳体11和/或屏幕等。连接元件15与表面的其他部分18共同构成电子设备的表面。连接元件15被配置为用于提供弹性回复力，以使振动部13回复至初始位置。激励器14被配置为用于提供驱动力，以使振动部13偏离初始位置，进行振动。
例如，振动部13呈片状结构，可以是圆形片状、矩形片状或者跑道形片状等。片状结构的发声效果良好。振动部13设置在激励器14和连接元件15之间。连接元件15覆盖激励器14的一个表面。例如，通过粘结剂或者双面胶将激励器14粘结在振动部13的中部，以及将振动部13粘结在连接元件15上。激励器14的振动方向垂直于振动部13的主表面。
例如，振动部13采用无机非金属材料、金属材料或者高分子材料。优选地，振动部13的杨氏模量在2000MPa以上，密度在2.7g/cm 3以下。该范围内的振动部13具有结构强度高、质量轻的特点，能够有效地降低表面发声装置的分割振动，并且振动时需要的驱动力小。
例如，激励器14包括压电式激励器14、动圈式激励器14、动铁式激励器14、动磁式激励器14或磁致伸缩式激励器14。通过粘结剂或双面胶将激励器14固定在振动部13的中部位置。激励器14接收外部电路的电信号，从而发生振动。激励器14带动振动部13振动，从而向外辐射声音。
连接元件15具有弹性，从而使振动部13回复至初始位置。例如，连接元件15的材质为高分子材料。高分子材料包括PI、PP、PEN、PPT等材料。上述材料均能提供弹性回复力。
连接元件15呈片状结构，例如，圆形片状、矩形片状或者跑道形片状等。由于在组装完成后，连接元件15位于电子设备的表面，故片状结构能够保持电子设备的外观良好。
在一个例子中，连接元件15的杨氏模量小于或等于6080Mpa，密度小于或等于1130kg/m3。该比例范围的连接元件15具有弹性良好、质量轻的特点。
此外，连接元件15还能起到防尘、防水等作用。
在本公开实施例中，激励器14振动并带动振动部13振动，从而直接向外辐射声音。振动方向垂直于振动部13的主表面。振动部13作为所在表面的一部分进行振动，而不是整个单侧表面进行振动，这样表面发声装置具有较小的辐射面积，振动时需要的驱动力降低，并且降低了振动部13振动所需要的激励器14的功率。
此外，由于辐射面积的减小，故所在电子设备不需要留出大的空间余量，便于电子设备的轻薄化设计。
此外，由于辐射面积的减小，故使得振动部13的质量减小，电声转换效率显著提高，振动灵敏度显著提高。
在一个例子中，如图1所示，连接元件15的面积大于振动部13的用于与连接元件15连接的一侧的面积。振动部13被设置在连接元件15的中部，以在连接元件15上形成环形边缘12。环形边缘12与表面的其他部分18连接。环形边缘12增大了连接元件15的接触面积，使得连接元件15与表面的其他部分18的连接更牢固。
在一个例子中,连接元件15的外表面与表面的其他部分18相平齐。这种设置方式使得电子设备的外观良好。
根据本公开的另一个实施例，提供了一种电子设备。如图1-4所示，电子设备包括壳体11和与壳体11连接的屏幕。在壳体11或者屏幕上形成有安装孔。壳体11或者屏幕为表面的其他部分18。计用于围成安装孔的壳体11部分或者屏幕部分为连接部。在安装孔内设置有上述表面发声装置。连接元件15与连接部连接。例如，通过双面胶或者粘结剂将连接元件15的边缘粘结在连接部。激励器14与安装孔的孔壁形成间隙，以避免孔壁对激励器14造成干涉。
在一个例子中，如图2所示，在连接部设置有下凹的环形台阶结构23。连接元件15嵌入环形台阶结构23中。环形台阶结构23围绕安装孔设置。例如，环形边缘12嵌入环形台阶结构23中。环形台阶结构23能够起到定位的作用，这使得连接元件15的连接位置更准确。
在一个例子中，连接元件15的弹性系数小于壳体11或者屏幕的弹性 系数。这种设置方式能降低壳体11或者屏幕的弹性形变对于表面发声装置的振动的影响，使得表面发声装置的发声效果更加良好。
在一个例子中，如图3-4所示，在屏幕上设置有安装孔。屏幕包括第一液晶屏16以及设置在第一液晶屏16的外侧的第一透明保护层21。外侧是指远离电子设备的内腔的一侧。第一液晶屏16和第一透明保护层21平行设置。
连接元件15为第二透明保护层22。振动部13为第二液晶屏17。第二透明保护层22与第二液晶屏17平行设置。第二透明保护层22的弹性系数小于第一透明保护层21的弹性系数。第一透明保护层21与第二透明保护层22连接。第一液晶屏16与第二液晶屏17共同用于图像显示。第一液晶屏16和第二液晶屏17为LED屏或者LCD屏。
在该例子中，可以是，第一透明保护层21和第二透明保护层22通过双面胶或者粘结剂粘结在一起。也可以是，第一透明保护层21和第二透明保护层22是一体成型的透明材料。在透明材料的局部做软化处理，以降低弹性系数，从而形成第二透明保护层22。第二透明保护层22以外的部分为第一透明保护层21。
软化处理的方法包括将第二透明保护层22做减薄处理，以使第二透明保护层22的厚度小于第一透明保护层21的厚度。较小的厚度能降低第二透明保护层22的弹性系数，使得振动部13的振动效果更好。
在该例子中，屏幕的一部分用于振动发声，而不是整个屏幕用于发声。声音辐射的方向朝向使用者，从而使得使用者的听音效果更好。
此外，表面发声装置作为屏幕的一部分，用于显示图像，这使得图像与声音的配合更顺畅。
在其他示例中，电子设备设置有多个表面发声装置。多个表面发声装置向不同的方向辐射声音，以形成立体声效果。这使得电子设备的发声效果更加优良。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围 和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (10)

  1. 一种表面发声装置,其中,包括激励器、振动部和连接元件，所述连接元件呈片状结构，所述振动部被设置在所述连接元件上，所述激励器被设置在所述振动部上，所述连接元件的边缘用于与电子设备的表面的其他部分连接，所述连接元件与所述表面的其他部分共同构成所述表面，所述连接元件被配置为用于提供弹性回复力，所述激励器被配置为用于提供驱动力。
  2. 根据权利要求1所述的表面发声装置,其中,所述连接元件的面积大于所述振动部的用于与所述连接元件连接的一侧的面积，所述振动部被设置在所述连接元件的中部，以在所述连接元件上形成环形边缘。
  3. 根据权利要求1所述的表面发声装置,其中,所述连接元件的外表面与所述表面的其他部分相平齐。
  4. 根据权利要求1所述的表面发声装置,其中,所述激励器包括压电式激励器、动圈式激励器、动铁式激励器、动磁式激励器或磁致伸缩式激励器。
  5. 根据权利要求1所述的表面发声装置,其中,所述连接元件的材质为高分子材料。
  6. 根据权利要求1所述的表面发声装置,其中,所述连接元件的杨氏模量小于或等于6080Mpa，密度小于或等于1130kg/m 3。
  7. 一种电子设备，其中，包括壳体和与所述壳体连接的屏幕，在所述壳体或者屏幕上形成有安装孔，所述壳体或者所述屏幕为所述表面的其他部分，用于包围所述安装孔的壳体部分或者屏幕部分为连接部，在所述 安装孔内设置有如权利要求1-6中的任意一项所述的表面发声装置，所述连接元件与所述连接部连接。
  8. 根据权利要求7所述的电子设备，其中，在所述连接部设置有下凹的环形台阶结构，所述连接元件嵌入所述环形台阶结构中。
  9. 根据权利要求7所述的电子设备，其中，所述连接元件的弹性系数小于所述壳体或者所述屏幕的弹性系数。
  10. 根据权利要求7所述的电子设备，其中，在所述屏幕上设置有所述安装孔，所述屏幕包括第一液晶屏以及设置在所述第一液晶屏的外侧的第一透明保护层，所述连接元件为第二透明保护层，所述振动部为第二液晶屏，所述第二透明保护层的弹性系数小于所述第一透明保护层的弹性系数，所述第一偏光片透明保护层与所述第二偏光片透明保护层，所述第一液晶屏与所述第二液晶屏共同用于图像显示。
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