WO2020107603A1 - 屏幕发声装置以及电子设备 - Google Patents

屏幕发声装置以及电子设备 Download PDF

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Publication number
WO2020107603A1
WO2020107603A1 PCT/CN2018/123672 CN2018123672W WO2020107603A1 WO 2020107603 A1 WO2020107603 A1 WO 2020107603A1 CN 2018123672 W CN2018123672 W CN 2018123672W WO 2020107603 A1 WO2020107603 A1 WO 2020107603A1
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WIPO (PCT)
Prior art keywords
screen
exciter
fixed
sound generating
generating device
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PCT/CN2018/123672
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English (en)
French (fr)
Inventor
张新众
朱跃光
毛东升
史德璋
臧玮晔
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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
Publication of WO2020107603A1 publication Critical patent/WO2020107603A1/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
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers

Definitions

  • the utility model relates to the technical field of electroacoustic conversion, and more particularly, to a screen sounding device and electronic equipment.
  • the screen In the screen sound technology, the screen is usually used as the sound source, and the exciter is fixed on the screen. Its working principle is that the exciter is used as a vibration source, which causes the screen to vibrate and sound when vibrating.
  • the screen generating device can be used as a handset of an electronic device such as a mobile phone. When the phone is close to the ear, in addition to the sound of the screen, it also has a bone conduction effect. The screen of the mobile phone resonates with the pinna to increase the volume.
  • An object of the utility model is to provide a new technical solution for a screen sounding device.
  • a screen sounding device includes a screen and an exciter.
  • the exciter is fixed on the screen.
  • the center of mass of the exciter and the center of mass of the screen have a set distance perpendicular to the main surface of the screen.
  • the vibration direction of the exciter is parallel to the main surface of the screen.
  • the actuator is fixed on the screen by an adhesive or double-sided tape.
  • a support is also included, through which the exciter is fixed on the screen.
  • the support includes a pad, the pad is fixed on the screen, and the exciter is fixed on the pad.
  • the support includes an L-shaped bracket, one side of the L-shaped bracket is parallel to the main body direction of the screen, and is fixed on the screen, and the exciter is fixed on the L-shaped bracket On the other side of the bracket.
  • the area of the part of the support connected to the screen is smaller than the area of the corresponding part of the actuator.
  • the exciter is fixed to a portion of the screen near the edge.
  • the screen includes a body part and a light-transmitting protective layer attached to the outside of the body part, the actuator is fixed on the body part; or an escape is provided on the body part Through holes or notches, the actuator passes through the escape through holes or notches and is fixed on the light-transmitting protective layer.
  • an electronic device includes a housing and the above-mentioned screen sounding device, and the screen sounding device is mounted on the housing.
  • the center of mass of the housing coincides with the center of mass of the exciter in a direction perpendicular to the vibration direction.
  • the vibration direction of the exciter is parallel to the main surface of the screen.
  • the center of mass of the actuator and the center of mass of the screen have a set distance in a direction perpendicular to the main surface of the screen.
  • the exciter when vibrating, the exciter generates a driving force and forms a torque on the screen.
  • Part of the screen vibrates around the center of mass of the screen under the action of torque.
  • the exciter does not drive the overall vibration of the screen, and thus does not drive other components, such as the overall vibration of the housing of the electronic device. This allows the vibration of the exciter to be transmitted to the screen to the maximum extent without being transmitted to other components.
  • the device can effectively improve the sound leakage phenomenon.
  • FIG. 1 is a schematic structural diagram of a screen sounding device according to an embodiment of the present disclosure.
  • FIG. 2 is a partial schematic view of a screen sounding device fixed by double-sided tape according to an embodiment of the present disclosure.
  • FIG. 3 is a partial schematic diagram of a screen sound device fixed by an adhesive according to an embodiment of the present disclosure.
  • FIG. 4 is a partial schematic diagram of a screen sound device fixed by a bracket according to an embodiment of the present disclosure.
  • FIG. 5 is a partial schematic diagram of a screen sound device fixed by a pad according to an embodiment of the present disclosure.
  • FIG. 6 is a partial schematic diagram of an electronic device according to an embodiment of the present disclosure.
  • FIGS. 7-8 are schematic diagrams of a screen sounding device according to an embodiment of the present disclosure.
  • 11 screen; 12: light-transmitting protective layer; 13: exciter; 14: middle frame; 15: back cover; 16: avoidance through hole; 17: double-sided adhesive; 18: adhesive; 19: bracket; 20: First side; 21: second side; 22: pad; 23: body part.
  • a screen sounding device As shown in FIG. 1, the device includes a screen 11 and an exciter 13. As shown in FIGS. 2-5, the screen 11 includes a body portion 23 and a light-transmitting protective layer 12 attached to the outside of the body portion 23.
  • the body 23 is an LED screen or an LCD screen.
  • the light-transmitting protective layer 12 can effectively protect the body portion 23.
  • the material of the light-transmitting protective layer 12 is glass, plastic, or the like.
  • the outside refers to the outer side when the screen sounding device is assembled to the electronic device.
  • the light-transmitting protective layer 12 is adhered to the outside of the body portion 23 with an adhesive.
  • the binder is common knowledge in the art and will not be described in detail here.
  • the exciter 13 is fixed on the screen 11.
  • the exciter 13 is fixed on the main surface or side of the screen 11.
  • the exciter 13 is a direct drive vibration device, that is, the screen 11 is directly driven to vibrate through the vibration of the exciter 13 itself.
  • the center of mass of the actuator 13 and the center of mass of the screen 11 have a set distance in a direction perpendicular to the main surface of the screen 11.
  • the vibration direction of the exciter 13 is parallel to the main surface of the screen 11.
  • the centroid of the exciter 13 refers to the center of the mass of the exciter 13, as shown by A in FIG.
  • the center of mass of the screen 11 refers to the center of the mass of the screen 11.
  • the main surface of the screen 11 refers to a surface of the screen 11 for display or a surface parallel to the surface.
  • the screen 11 may be flat or curved.
  • the exciter 13 is fixed to the main body.
  • the body portion 23 is provided with an escape through hole 16 or a notch.
  • the exciter 13 passes through the escape through hole 16 or the notch, and is fixed on the light-transmitting protective layer 12. This method can effectively reduce the space inside the electronic device occupied by the exciter 13 and facilitate the flat design of the electronic device.
  • the exciter 13 is provided in the above-mentioned parts to effectively drive the screen 11 to vibrate and sound.
  • FIGS. 7-8 are schematic diagrams of a screen sounding device according to an embodiment of the present disclosure.
  • the vibration direction of the exciter 13 is parallel to the main surface of the screen 11.
  • the center of mass of the exciter 13 and the center of mass of the screen 11 have a set distance in the direction perpendicular to the main surface of the screen 11 as shown by L in FIG. 1. In this way, when vibrating, the exciter 13 generates a driving force and forms a torque on the screen 11. A part of the screen 11 vibrates around the center of mass of the screen 11 under the action of torque.
  • the exciter 13 does not drive the overall vibration of the screen 11 and thus does not drive other components, such as the entire vibration of the housing of the electronic device. This allows the vibration of the exciter 13 to be transmitted to the screen 11 to the maximum extent without being transmitted to other components.
  • the device can effectively improve the sound leakage caused by the vibration of components such as the casing of electronic equipment.
  • the device has a simple structure and does not require a large-scale redesign of the screen sounding device.
  • the exciter 13 is fixed on the screen 11 by an adhesive 18.
  • the adhesive 18 includes UV glue, epoxy glue, and the like.
  • the exciter 13 is fixed on the screen 11 through the double-sided tape 17.
  • the double-sided adhesive 17 can effectively prevent the adhesive 18 from overflowing.
  • the screen sounding device further includes a support.
  • the exciter 13 is fixed on the screen 11 by a support.
  • the supporting member is fixedly connected to the screen 11 through the adhesive 18 or the double-sided adhesive 17.
  • the exciter 13 is fixedly connected to the support member via an adhesive 18 or double-sided adhesive 17.
  • the distance between the center of mass of the exciter 13 and the center of mass of the screen sounding device in the direction perpendicular to the main surface of the screen 11 can be adjusted by providing the support member, so as to adjust the magnitude of the moment of the exciter 13.
  • the support can also play a role of heat insulation. Due to the existence of the supporting member, the heat of the actuator 13 will not be directly transmitted to the screen 11, thereby reducing the damage to the screen 11 caused by the heat of the actuator 13 during long-term, high-power use.
  • the material of the support is metal, plastic or ceramic. For example, PTFE, PC, PP, POM, PS and other materials.
  • the arrangement of the support improves the adaptability of the actuator 13. It is possible to select a part of the exciter 13 that is convenient to assemble with the support, and is not limited to a single surface of the exciter 13.
  • the support includes a block 22.
  • the pad 22 has a block structure.
  • the pad 22 is fixed on the screen 11.
  • the exciter 13 is fixed to the pad 22.
  • the shape of the pad 22 may be circular, square, oval, or the like.
  • the support includes an L-shaped bracket 19.
  • the L-shaped bracket 19 includes two sides connected to each other. For example, the first side 20 and the second side 21. One side of the L-shaped bracket 19 is parallel to the main body direction of the screen 11 and is fixed on the screen 11.
  • the exciter 13 is fixed on the other side of the L-shaped bracket 19.
  • the first side 20 is adhered to the screen 11.
  • the exciter 13 is fixed on the second side 21.
  • the exciter 13 can be fixed at any position on the second side 21.
  • the area of the part of the support connected to the screen 11 is smaller than the area of the corresponding part of the actuator 13. In this way, the connection area between the actuator 13 and the screen 11 can be effectively reduced, and the adverse effect of the actuator 13 on the screen 11 can be reduced.
  • the surface of the pad 22 for connection is smaller than the area of the mounting surface of the actuator 13 when directly assembled to the screen 11; or the area of the first side 20 of the bracket 19 is smaller than that of the actuator 13 when directly assembled to the screen 11
  • the area of the mounting surface when up. All of the above support members can reduce the connection area between the actuator 13 and the screen 11.
  • the exciter 13 can be fixed at any position on the screen 11. Preferably, as shown in FIG. 1, the exciter 13 is fixed to a portion of the screen 11 near the edge.
  • the exciter 13 is provided in this part, which can make the amplitude of the screen 11 larger and the listening effect better.
  • the exciter 13 is provided at the center of the screen 11.
  • the exciter 13 disposed at this position can also drive the screen 11 to vibrate and sound.
  • the cushion block 22 and the support frame are fixed on the light-transmitting protective layer 12.
  • the exciter 13 can also drive the screen 11 to vibrate and sound.
  • an electronic device is provided.
  • the electronic device may be, but not limited to, a mobile phone, a tablet computer, a walkie-talkie, a game console, a notebook computer, a VR device, an AR device, etc.
  • the electronic device includes a housing and the above screen sounding device.
  • the screen sounding device is installed on the housing.
  • the housing includes a middle frame 14 and a back cover 15.
  • the middle frame 14 has a frame structure, for example, a rectangular frame.
  • the back cover 15 and the screen sounding device are installed on both sides of the middle frame 14.
  • the screen sounding device, the middle frame 14 and the back cover 15 enclose a receiving cavity.
  • Electronic components such as a power supply, a processor, a communication device, and a motherboard are arranged in the receiving cavity.
  • the electronic device has the characteristics of good sounding effect and small sound leakage.
  • the center of mass of the housing (shown as C in FIG. 6) and the center of mass of the actuator 13 (shown as A in FIG. 6) coincide with each other in a direction perpendicular to the vibration direction. In this way, the vibration of the exciter 13 does not form a torque on the housing, so that the exciter 13 does not drive the housing to vibrate. This can effectively improve the sound leakage phenomenon.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Abstract

一种屏幕发声装置以及电子设备。该装置包括屏幕（11）和激励器（13），激励器（13）被固定在屏幕（11）上，激励器（13）的质心与屏幕（11）的质心在垂直于屏幕（11）的主表面方向上具有设定的距离，激励器（13）的振动方向平行于屏幕（11）的主表面。该屏幕发声装置能够改善漏音的问题。

Description

屏幕发声装置以及电子设备 技术领域
本实用新型涉及电声转换技术领域，更具体地，涉及一种屏幕发声装置以及电子设备。
背景技术
在屏幕发声技术中，通常将屏幕作为发声源，激励器固定在屏幕上。其工作原理是激励器作为振动源，振动时带动屏幕振动发声。屏幕发生装置可以用作手机等电子设备的听筒。当手机紧贴耳朵时，除屏幕发声外，还有骨传导作用。手机屏幕与耳廓共振，从而加大音量。
传统的激励器通常固定在屏幕或者中框上。激励器垂直于屏幕振动。但由于在振动时激励器会带动屏幕、中框、后盖一起振动，故会导致屏幕发声装置的漏音较大，在通话时容易泄露隐私。
因此，需要提供一种新的技术方案，以解决上述技术问题。
实用新型内容
本实用新型的一个目的是提供一种屏幕发声装置的新技术方案。
根据本实用新型的第一方面，提供了一种屏幕发声装置。该装置包括屏幕和激励器，所述激励器被固定在所述屏幕上，所述激励器的质心与所述屏幕的质心在垂直于所述屏幕的主表面方向上具有设定的距离，所述激励器的振动方向平行于所述屏幕的主表面。
可选地，所述激励器通过粘结剂或者双面胶被固定在所述屏幕上。
可选地，还包括支撑件，所述激励器通过所述支撑件被固定在所述屏幕上。
可选地，所述支撑件包括垫块，所述垫块被固定在所述屏幕上，所述激励器被固定在所述垫块上。
可选地，所述支撑件包括L形支架，所述L形支架的一条边平行于所述屏幕的主体方向，并被固定在所述屏幕上，所述激励器被固定在所述L形支架的另一条边上。
可选地，所述支撑件的与所述屏幕连接的部位的面积小于所述激励器的相应的部位的面积。
可选地，所述激励器被固定在所述屏幕的靠近边缘的部位。
可选地，所述屏幕包括本体部和与贴合在所述本体部的外侧的透光保护层，所述激励器被固定在所述本体部上；或者在所述本体部上设置有避让通孔或者缺口，所述激励器穿过所述避让通孔或者缺口，并被固定在所述透光保护层上。
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上述屏幕发声装置，所述屏幕发声装置被安装在所述壳体上。
可选地，所述壳体的质心与所述激励器的质心在垂直于振动方向上重合。
根据本公开的一个实施例，激励器的振动方向平行于屏幕的主表面。激励器的质心与屏幕的质心在垂直于屏幕的主表面方向上具有设定的距离。这样，在振动时，激励器产生驱动力，并对屏幕形成力矩。屏幕的局部在力矩的作用下绕屏幕的质心发生振动。激励器不会带动屏幕整体的振动，从而不会带动其他部件，例如电子设备的壳体整体振动。这使得激励器的振动能够最大限度地传递到屏幕上，而不会传递到其他部件上。该装置能有效地改善漏音现象。
通过以下参照附图对本实用新型的示例性实施例的详细描述，本实用新型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实用新型的实施例，并且连同其说明一起用于解释本实用新型的原理。
图1是根据本公开的一个实施例的屏幕发声装置的结构示意图。
图2是根据本公开的一个实施例的通过双面胶固定的屏幕发声装置的 局部示意图。
图3是根据本公开的一个实施例的通过粘结剂固定的屏幕发声装置的局部示意图。
图4是根据本公开的一个实施例的通过支架固定的屏幕发声装置的局部示意图。
图5是根据本公开的一个实施例的通过垫块固定的屏幕发声装置的局部示意图。
图6是根据本公开的一个实施例的电子设备的局部示意图。
图7-8是根据本公开的一个实施例的屏幕发声装置的原理图。
附图标记说明：
11：屏幕；12：透光保护层；13：激励器；14：中框；15：后盖；16：避让通孔；17：双面胶；18：粘结剂；19：支架；20：第一边；21：第二边；22：垫块；23：本体部。
具体实施方式
现在将参照附图来详细描述本实用新型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实用新型的范围。
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，决不作为对本实用新型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，提供了一种屏幕发声装置。如图1所示， 该装置包括屏幕11和激励器13。如图2-5所示，屏幕11包括本体部23和贴合在本体部23的外侧的透光保护层12。本体部23为LED屏或者LCD屏。透光保护层12能够有效地保护本体部23。透光保护层12的材质为玻璃、塑料等。外侧是指在屏幕发声装置装配到电子设备上时靠外的一侧。
例如，通过粘结剂将透光保护层12粘结在本体部23的外侧。粘结剂为本领域的公知常识，在此不做详细说明。
激励器13被固定在屏幕11上。例如，激励器13被固定在屏幕11的主表面或者侧边上。激励器13为直驱式振动装置，即通过激励器13自身的振动直接驱动屏幕11振动。如图1所示，激励器13的质心与屏幕11的质心在垂直于屏幕11的主表面方向上具有设定的距离。激励器13的振动方向平行于屏幕11的主表面。
激励器13的质心是指激励器13的质量的中心，如图1中A所示。屏幕11的质心是指屏幕11的质量的中心。例如，屏幕11的质量均一，则质心位于屏幕11的几何中心位置，如图1中B所示。屏幕11的主表面是指屏幕11的用于显示的表面或者与该表面平行的表面。屏幕11可以是平面的或者曲面的。
例如，如图2-5所示，激励器13被固定在主体部上。或者，如图6所示，在本体部23上设置有避让通孔16或者缺口。激励器13穿过避让通孔16或者缺口，并被固定在透光保护层12上。这种方式能有效地降低激励器13占用的电子设备内部的空间，便于电子设备的扁平化设计。激励器13被设置在上述部位均能有效地驱动屏幕11振动发声。
图7-8是根据本公开的一个实施例的屏幕发声装置的原理图。
在本公开实施例中，激励器13的振动方向平行于屏幕11的主表面。激励器13的质心与屏幕11的质心在垂直于屏幕11的主表面方向上具有设定的距离，如图1中L所示。这样，在振动时，激励器13产生驱动力，并对屏幕11形成力矩。屏幕11的局部在力矩的作用下绕屏幕11的质心发生振动。
例如，如图7所示，当激励器13的驱动力向上时，则屏幕11的局部以B为中心向左侧摆动；如图8所示，当激励器13的驱动力向下时，则屏 幕11的局部以B为中心向右侧摆动。激励器13发生往复振动，从而带动屏幕11的局部振动，以向外辐射声音。
激励器13不会带动屏幕11整体的振动，从而不会带动其他部件，例如电子设备的壳体整体振动。这使得激励器13的振动能够最大限度地传递到屏幕11上，而不会传递到其他部件上。该装置能有效地改善由于电子设备的壳体等部件的振动引起的漏音现象。
此外，该装置的结构简单，不需要对屏幕发声装置进行大规模的重新设计。
在一个例子中，如图3所示，激励器13通过粘结剂18被固定在屏幕11上。粘结剂18包括UV胶、环氧树脂胶等。
还可以是，如图2所示，激励器13通过双面胶17被固定在屏幕11上。双面胶17能够有效地防止粘结剂18的溢胶现象。
在一个例子中，如图4-5所示，屏幕发声装置还包括支撑件。激励器13通过支撑件被固定在屏幕11上。例如，支撑件通过粘结剂18或者双面胶17与屏幕11固定连接。激励器13通过粘结剂18或者双面胶17与支撑件固定连接。通过设置支撑件能调节激励器13的质心与屏幕发声装置的质心在垂直于屏幕11的主表面方向的距离，从而调剂激励器13的力矩的大小。
此外，支撑件还能起到隔热的作用。由于支撑件的存在，故激励器13的热量不会直接传导致屏幕11上，从而减小了在长时间、大功率使用时激励器13的热量对屏幕11的损伤。支撑件的材质为金属、塑料或者陶瓷等。例如，PTFE、PC、PP、POM、PS等材料。
此外，支撑件的设置提高了激励器13的适应性。可以选择激励器13的便于装配的部位与支撑件进行装配，而不限于激励器13的单一表面。
在一个例子中，支撑件包括垫块22。垫块22呈块状结构。垫块22被固定在屏幕11上。激励器13被固定在垫块22上。垫块22的形状可以是圆形、方形、椭圆形等。
还可以是，支撑件包括L形支架19。L形支架19包括相互连接的两条边。例如，第一边20和第二边21。L形支架19的一条边平行于屏幕11 的主体方向，并被固定在屏幕11上。激励器13被固定在L形支架19的另一条边上。例如，第一边20被粘结在屏幕11上。激励器13被固定在第二边21上。激励器13可以被固定在第二边21的任意位置。
优选地，支撑件的与屏幕11连接的部位的面积小于激励器13的相应的部位的面积。通过这种方式能有效地减小激励器13与屏幕11的连接面积，降低了激励器13对于屏幕11的不利影响。
例如，垫块22的用于连接的表面的面积小于激励器13在直接装配到屏幕11上时安装面的面积；或者支架19的第一边20的面积小于激励器13在直接装配到屏幕11上时安装面的面积。上述支撑件均能减小激励器13与屏幕11的连接面积。
当然，支撑件的结构不限于上述实施例，本领域技术人员可以根据实际需要进行选择。
激励器13可以被固定在屏幕11的任意位置上。优选地，如图1所示，激励器13被固定在屏幕11的靠近边缘的部位。激励器13设置在该部位，能够使屏幕11的振幅更大，听音效果更好。
在其他示例中，激励器13被设置在屏幕11的中心位置。激励器13设置在该位置同样能够驱动屏幕11进行振动发声。
在其他示例中，垫块22、支撑架被固定在透光保护层12上。在这种设置方式中，激励器13同样能够驱动屏幕11进行振动发声。
根据本公开的另一个实施例，提供了一种电子设备。如图6所示，电子设备可以是但不局限于手机、平板电脑、对讲机、游戏机、笔记本电脑、VR设备、AR设备等。
该电子设备包括壳体和上述屏幕发声装置。屏幕发声装置被安装在壳体上。例如，壳体包括中框14和后盖15。中框14呈框体结构，例如矩形框体。后盖15和屏幕发声装置被安装在中框14的两侧。屏幕发声装置、中框14和后盖15围成容纳腔。电源、处理器、通信装置、主板等电子元件被设置在容纳腔中。
该电子设备具有发声效果好，漏音小的特点。
在一个例子中，如图6所示，壳体的质心(如图6中C所示)与激励 器13的质心(如图6中A所示)在垂直于振动方向上重合。通过这种方式，激励器13的振动不会对壳体形成力矩，从而使得激励器13不会驱动壳体振动。这样能够更有效地改善漏音现象。
虽然已经通过例子对本实用新型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，而不是为了限制本实用新型的范围。本领域的技术人员应该理解，可在不脱离本实用新型的范围和精神的情况下，对以上实施例进行修改。本实用新型的范围由所附权利要求来限定。

Claims (10)

  1. 一种屏幕发声装置，其特征在于，包括屏幕和激励器，所述激励器被固定在所述屏幕上，所述激励器的质心与所述屏幕的质心在垂直于所述屏幕的主表面方向上具有设定的距离，所述激励器的振动方向平行于所述屏幕的主表面。
  2. 根据权利要求1所述的屏幕发声装置，其特征在于，所述激励器通过粘结剂或者双面胶被固定在所述屏幕上。
  3. 根据权利要求1所述的屏幕发声装置，其特征在于，还包括支撑件，所述激励器通过所述支撑件被固定在所述屏幕上。
  4. 根据权利要求3所述的屏幕发声装置，其特征在于，所述支撑件包括垫块，所述垫块被固定在所述屏幕上，所述激励器被固定在所述垫块上。
  5. 根据权利要求3所述的屏幕发声装置，其特征在于，所述支撑件包括L形支架，所述L形支架的一条边平行于所述屏幕的主体方向，并被固定在所述屏幕上，所述激励器被固定在所述L形支架的另一条边上。
  6. 根据权利要求3-5中的任意一项所述的屏幕发声装置，其特征在于，所述支撑件的与所述屏幕连接的部位的面积小于所述激励器的相应的部位的面积。
  7. 根据权利要求1-5中的任意一项所述的屏幕发声装置，其特征在于，所述激励器被固定在所述屏幕的靠近边缘的部位。
  8. 根据权利要求1-5中的任意一项所述的屏幕发声装置，其特征在 于，所述屏幕包括本体部和与贴合在所述本体部的外侧的透光保护层，所述激励器被固定在所述本体部上；或者
    在所述本体部上设置有避让通孔或者缺口，所述激励器穿过所述避让通孔或者缺口，并被固定在所述透光保护层上。
  9. 一种电子设备，其特征在于，包括壳体和如权利要求1-8中的任意一项所述的屏幕发声装置，所述屏幕发声装置被安装在所述壳体上。
  10. 根据权利要求9所述的电子设备，其特征在于，所述壳体的质心与所述激励器的质心在垂直于振动方向上重合。
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