Vibration device, device containing same, and transportation device

Abstract

To improve a sound characteristic and a sound pressure characteristic in a low-pitched sound band region.SOLUTION: A vibration apparatus may include a vibration element and an adhesive member at a rear surface of the vibration element. A modulus of the vibration element may be equal to a modulus of the adhesive member or may be greater than the modulus of the adhesive member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This specification relates to a vibration device and an apparatus and a transport device including the same. [Background technology]

[0002] The vibration device can vibrate and output sound using a coil system including a magnet and a coil, or a piezoelectric system using a piezoelectric element.

[0003] The piezoelectric vibration device has a problem in that it can be easily damaged by external impact due to the brittle characteristics of the piezoelectric element, resulting in low reliability of sound reproduction.

[0004] Furthermore, piezoelectric vibration devices have the disadvantage that, due to the low piezoelectric constant of the piezoelectric element, the acoustic characteristics and / or sound pressure characteristics are lower in the low frequency range compared to coil types. Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the inventors of the present specification have recognized the above problems and conducted several experiments to realize a vibration device with improved reliability in sound reproduction, and further conducted several experiments to realize a new vibration device that can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range. Through several experiments, the inventors of the present specification have invented a new vibration device with improved reliability in sound reproduction, and invented a new vibration device with improved acoustic characteristics and / or sound pressure characteristics in the low frequency range.

[0006] The problem to be solved by one embodiment of the present specification is to provide a vibration device with improved reliability in sound reproduction, and a device and a transportation device including the same.

[0007] An object of the present invention is to provide a vibration device that can improve acoustic characteristics and / or sound pressure characteristics in the low frequency band region, and a device and a transportation device that include the same.

[0008] The problems to be solved by the examples of this specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] A vibration device according to one embodiment of the present specification includes a vibration element and an adhesive member on a surface of the vibration element, and the elastic modulus of the vibration element can be the same as or greater than the elastic modulus of the adhesive member.

[0010] An apparatus according to one embodiment of the present specification includes a vibration member and one or more vibration generating devices connected to the vibration member, the one or more vibration generating devices including a vibration element and an adhesive member on a surface of the vibration element, and the elastic modulus of the vibration element can be the same as or greater than the elastic modulus of the adhesive member.

[0011] A transportation device according to one embodiment of the present disclosure includes an exterior covering a main structure, an interior covering the main structure and one or more of the exterior coverings, a garnish covering a portion of the interior covering, and one or more sound-generating devices located between at least two of the main structure, the exterior coverings, and the interior coverings, or between the garnish coverings and the interior coverings, the one or more sound-generating devices including a vibration device, a vibration element, and an adhesive member located on a back surface of the vibration element. The elastic modulus of the vibration element may be the same as or greater than the elastic modulus of the adhesive member. One or more of the interior coverings, the exterior coverings, and the garnish can output sound by vibration of the one or more sound-generating devices.

[0012] Specific details relating to various examples of this specification other than the means for solving the problems mentioned above are included in the following description and drawings. [Effects of the Invention]

[0013] According to the embodiments of the present specification, it is possible to provide a vibration device with improved reliability in sound reproduction, and a device and a transportation device including the same.

[0014] According to the embodiments of the present specification, it is possible to provide a vibration device capable of improving acoustic characteristics and / or sound pressure characteristics in the low frequency band region, and a device and a transportation device including the same.

[0015] The above-mentioned problems to be solved, means for solving the problems, and effects do not specify essential features of the claims, and the scope of the claims is not limited by the matters described in the content of the invention. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is an exploded perspective view showing a vibration device according to an embodiment of the present specification; [Figure 2] FIG. 2 is a cross-sectional view taken along line AA' shown in FIG. [Figure 3] FIG. 10 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. [Figure 4] FIG. 4 is a cross-sectional view taken along line BB' shown in FIG. [Figure 5] FIG. 10 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. [Figure 6] FIG. 6 is a cross-sectional view taken along line CC' shown in FIG. 5. [Figure 7] FIG. 10 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. [Figure 8] FIG. 8 is a cross-sectional view taken along line DD' shown in FIG. [Figure 9] FIG. 10 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. [Figure 10] 10 is a cross-sectional view taken along line EE' shown in FIG. 9. [Figure 11] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 12] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 13] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 14] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 15] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 16] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 17] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 18] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 19] FIG. 10 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. [Figure 20] FIG. 10 is a perspective view showing a diaphragm according to another embodiment of the present specification. [Figure 21] FIG. 21 is a cross-sectional view taken along line FF' shown in FIG. 20. [Figure 22A] 21 is another cross-sectional view taken along the line FF' shown in FIG. 20. FIG. [Figure 22B] 21 is another cross-sectional view taken along the line FF' shown in FIG. 20. FIG. [Figure 23] FIG. 10 is a perspective view showing a diaphragm according to another embodiment of the present specification. [Figure 24A] FIG. 24 is a cross-sectional view taken along line GG' shown in FIG. [Figure 24B] 24 is another cross-sectional view taken along line GG' shown in FIG. 23. FIG. [Figure 25] FIG. 10 is a perspective view showing a diaphragm according to another embodiment of the present specification. [Figure 26] FIG. 26 is a cross-sectional view taken along line HH' shown in FIG. [Figure 27] FIG. 10 is a perspective view showing a diaphragm according to another embodiment of the present specification. [Figure 28]FIG. 28 is a cross-sectional view taken along line II' shown in FIG. 27. [Figure 29] 1A and 1B are diagrams illustrating a vibration element according to an embodiment of the present specification. [Figure 30] FIG. 30 is a cross-sectional view taken along line JJ' shown in FIG. 29. [Figure 31] 31 is a perspective view showing the piezoelectric vibrating part shown in FIG. 30. FIG. [Figure 32A] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 32B] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 32C] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 32D] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 33] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 34] FIG. 34 is a cross-sectional view taken along line K-K' shown in FIG. [Figure 35] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 36] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 37] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 38] FIG. 38 is a cross-sectional view taken along line LL' shown in FIG. [Figure 39] FIG. 38 is a cross-sectional view taken along line MM' shown in FIG. 37. [Figure 40] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 41] FIG. 41 is a cross-sectional view taken along line NN' shown in FIG. [Figure 42] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 43] 1 illustrates an apparatus according to one embodiment of the present disclosure. [Figure 44] FIG. 44 is a diagram showing the main cable and first to n-th signal cables shown in FIG. [Figure 45] 44 is a waveform diagram showing an output signal of the acoustic data generating circuit unit shown in FIG. 43. [Figure 46] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 47] FIG. 47 is a cross-sectional view taken along line OO' shown in FIG. 46. [Figure 48] FIG. 47 is another cross-sectional view of the line OO' shown in FIG. 46. [Figure 49] FIG. 47 is another cross-sectional view of the line OO' shown in FIG. 46. [Figure 50] FIG. 47 is another cross-sectional view of the line OO' shown in FIG. 46. [Figure 51] FIG. 47 is another cross-sectional view of the line OO' shown in FIG. 46. [Figure 52] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 53] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 54] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 55] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 56] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 57] FIG. 10 shows an apparatus according to another embodiment of the present disclosure. [Figure 58] 1 illustrates a transportation device according to one embodiment of the present disclosure. [Figure 59] 1 is a cross-sectional view of a transport device according to one embodiment of the present disclosure. [Figure 60] FIG. 60 is a diagram showing sound generating devices arranged around the driver's seat and front passenger seats in FIGS. 58 and 59. [Figure 61] 59. FIG. 60 shows sound-generating devices placed on the door and glass window of FIGS. 58 and 59. [Figure 62] FIG. 60 shows a sound-generating device disposed on the roof panel of FIGS. 58 and 59. [Figure 63] FIG. 60 shows sound generating devices arranged on the roof panel, glass window and seat of FIGS. 58 and 59. [Figure 64] 10A and 10B are diagrams showing modified interior materials of a transportation device according to an embodiment of the present specification. [Figure 65] 10A and 10B are diagrams illustrating other variations of interior materials for a transportation device according to an embodiment of the present specification. [Figure 66] FIG. 62 is a diagram showing the garnish member and the fourth sound-generating device shown in FIGS. 60 and 61. DETAILED DESCRIPTION OF THE INVENTION

[0017] The advantages and features of the present specification, and methods for achieving them, will become clearer with reference to the following detailed description of an embodiment accompanied by the accompanying drawings. However, the present specification is not limited to the embodiment disclosed below, and may be realized in various different forms. The embodiment is provided merely to complete the disclosure of the specification and to fully convey the scope of the invention to those skilled in the art to which the specification pertains. The specification is defined only by the scope of the claims.

[0018] In order to explain the embodiments of the present specification, the shapes, sizes, ratios, angles, numbers, etc. shown in the drawings are merely examples and the present specification is not limited to the details shown in the drawings. The same reference numerals refer to the same elements throughout the specification. Furthermore, in describing the present specification, if a detailed description of related prior art is deemed to unnecessarily obscure the gist of the present invention, such detailed description may be omitted. When terms such as "comprise," "have," and "consist of" are used in the present specification, other parts may be added unless "only" is used. When a component is expressed in the singular, the plural may also be included unless otherwise explicitly stated.

[0019] When interpreting elements, they are interpreted as including a range of error even if there is no other explicit description of the range of error.

[0020] When describing a positional relationship, for example when the positional relationship of two parts is described using "above," "on top," "below," or "beside," one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0021] When describing a temporal relationship, for example, when the temporal sequence is described using "after," "following," "next," or "before," it can also include cases where the context is not consecutive, since "immediately" or "directly" is not used.

[0022] Although terms such as "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, a first component referred to below may also be a second component within the technical concept of the present invention.

[0023] In describing components in this specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are used to distinguish the component from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component can be directly coupled or connected to the other component, but unless otherwise explicitly stated, other components may also be "intervened" between components that can be indirectly coupled or connected.

[0024] The term "at least one" should be understood to include all combinations of one or more of the associated components. For example, the meaning of "at least one of the first, second, and third components" can include not only the first, second, or third component, but all combinations of two or more of the first, second, and third components.

[0025] The features of the various embodiments of this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms may be possible, and each embodiment may be implemented independently of the others, or may be implemented together in a linked relationship.

[0026] The following detailed description of the present invention will be given with reference to the accompanying drawings and examples. The scales of the components shown in the drawings may differ from the actual scales for the sake of convenience of explanation, and are not limited to the scales shown in the drawings.

[0027] Fig. 1 is an exploded perspective view showing a vibration device according to an embodiment of the present specification, and Fig. 2 is a cross-sectional view taken along line AA' shown in Fig. 1.

[0028] 1 and 2, a vibration device 10-1 according to one embodiment of the present disclosure may include a vibration element 11 and an adhesive member 12.

[0029] The vibration element 11 may be configured to vibrate (or displace or be driven) by an applied electric signal (or voice signal), or may be configured to vibrate (or displace or be driven) a vibrating member (or diaphragm, or vibrating object). For example, the vibration element 11 may be expressed by terms such as, but not limited to, a vibrating structure, a vibrator, a vibration generating element, a vibration generating device, a vibration generator, a sounder, an acoustic element, an acoustic device, an acoustic generating element, an acoustic generating device, or an acoustic generator.

[0030] The vibration element 11 according to an embodiment of the present specification may include a piezoelectric material (or an electroactive material) having piezoelectric properties. The vibration element 11 may vibrate (or displace or drive) itself or vibrate (or displace or drive) a vibrating member (or diaphragm or vibrating object) by vibration (or displacement or drive) of the piezoelectric material due to an electric signal (or voice signal) applied to the piezoelectric material. For example, the vibration element 11 may vibrate (or displace or drive) by alternately repeating contraction and expansion due to the piezoelectric effect (or piezoelectric properties). For example, the vibration element 11 may vibrate (or displace or drive) in the vertical direction (or thickness direction) (Z) by alternately repeating contraction and expansion due to the inverse piezoelectric effect. The vibration element 11 according to an embodiment of the present specification may be a piezoelectric vibration element. For example, the vibration element 11 according to one embodiment of the present specification may be expressed by terms such as, but not limited to, a piezoelectric vibration structure, a piezoelectric vibrator, a piezoelectric vibration generating element, a piezoelectric vibration generator, a piezoelectric sound generator, a piezoelectric acoustic element, a piezoelectric sound generating element, a piezoelectric sound generator, a piezoelectric actuator, a piezoelectric exciter, or a piezoelectric transducer.

[0031] The vibration element 11 according to an embodiment of the present specification may be configured to have flexibility. For example, the vibration element 11 may be configured to bend into a non-planar shape, including a curved surface. As a result, the vibration element 11 according to an embodiment of the present specification may be expressed by terms such as, but not limited to, a flexible vibrating structure, a flexible vibrator, a flexible vibration generating element, a flexible vibration generator, a flexible sound generator, a flexible acoustic element, a flexible sound generating element, a flexible sound generator, a flexible actuator, a flexible exciter, or a flexible transducer.

[0032] The vibration element 11 according to an embodiment of the present specification may have a rectangular shape having a first length parallel to a first direction (X) and a second length parallel to a second direction (Y) intersecting the first direction (X). For example, the vibration element 11 may have a square shape in which the first length and the second length are the same. However, the vibration element 11 is not limited thereto, and may have a rectangular shape, a non-square shape, a circular shape, or an elliptical shape in which one of the first length and the second length is longer.

[0033] The adhesive member 12 may be connected or bonded to either of the first surface (S1) and the second surface (S2) of the vibration element 11, which is different (or opposite) from the first surface (S1). For example, the first surface (S1) of the vibration element 11 may be expressed by terms such as the top surface, front surface, upper surface, or one surface of the vibration element 11, but is not limited thereto. The second surface (S2) of the vibration element 11 may be expressed by terms such as the bottom surface, rear surface, back surface, lower surface, or back surface of the vibration element 11, but is not limited thereto. For example, in the vibration element 11, the first surface (S1) may be positioned closer to the front surface (or top surface, or upper surface, or one surface) of the vibration device 10-1 than the second surface (S2).

[0034] The adhesive member 12 according to an embodiment of the present specification may be connected or bonded to the second surface (S2) of the vibration element 11. For example, the adhesive member 12 may have the same size as the vibration element 11. For example, the adhesive member 12 may be connected or bonded to the entire second surface (S2) of the vibration element 11, but is not limited thereto, and may be connected or bonded to at least a portion of the second surface (S2) of the vibration element 11.

[0035] The adhesive member 12 according to an embodiment of the present specification may include an adhesive layer (or a pressure-sensitive adhesive layer) having excellent adhesion or bonding strength. For example, the adhesive member 12 may include a double-sided adhesive tape, a double-sided adhesive foam pad, or a pressure-sensitive adhesive sheet. For example, when the adhesive member 12 includes a pressure-sensitive adhesive sheet (or a pressure-sensitive adhesive layer), the adhesive member 12 may include only the adhesive layer or the pressure-sensitive adhesive layer without a base member such as a plastic material.

[0036] The adhesive layer (or adhesive layer) of the adhesive member 12 according to one embodiment of the present specification may include epoxy, acrylic, silicone, or urethane, but the embodiment of the present specification is not limited thereto.

[0037] The adhesive layer (or adhesive layer) of the adhesive member 12 according to other embodiments of the present specification may include a pressure sensitive adhesive (PSA), an optically clear adhesive (OCA), or an optically clear resin (OCR), and the embodiments of the present specification are not limited thereto.

[0038] The adhesive member 12 according to one embodiment of the present disclosure connects or is bonded to the vibration element 11 to the vibration member. For example, the adhesive member 12 may be disposed between the vibration element 11 and the vibration member. For example, the adhesive member 12 may include a first surface (or top surface) connected or bonded to the second surface (S2) of the vibration element 11, and a second surface (or back surface) different from (or opposite to) the first surface. For example, the vibration member may have a relatively greater hardness than the vibration element 11.

[0039] A vibration member according to an embodiment of the present specification may include a structure that vibrates due to vibration of the vibration element 11. The vibration member may have a relatively larger size than the vibration element 11. The vibration member may have a relatively lower hardness than the vibration element 11. For example, the vibration member may be expressed by terms such as a vibration plate, a vibration target, a vibration object, an acoustic vibration plate, or an acoustic output member, and the embodiments of the present specification are not limited thereto.

[0040] A vibrating member according to one embodiment of the present specification may include one or more flat portions and curved portions. The vibrating element 11 may be coupled or bonded to at least a portion of the vibrating member including the curved portion via an adhesive member 12. This allows the vibrating element 11 to be bent into a shape that conforms to the shape (or surface shape) of the vibrating member, thereby improving the reliability of sound reproduction and improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency band region. For example, the vibrating element 11 may be configured to be bent into an equiangular shape or a conformal shape that directly follows the curvature of the vibrating member. For example, if the vibrating member includes various curved portions, the vibrating element 11 may be configured to be bent into various curved shapes corresponding to the various curved portions of the vibrating member. For example, if the vibrating member includes a flat portion and a convex curved portion extending from the flat portion, the vibrating element 11 may be configured to be bent into a shape including a flat surface and a convex curved surface corresponding to the flat surface and convex curved portion of the vibrating member.

[0041] According to one embodiment of the present specification, the vibration element 11 can have an elastic modulus (or Young's modulus) equal to or greater than that of the adhesive member 12 so that the vibration element 11 can be bent into a curved shape. For example, the vibration element 11 can have an elastic modulus equal to or greater than that of the adhesive member 12. Therefore, the vibration device 10-1 according to one embodiment of the present specification can improve the reliability of sound reproduction and can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency band. For example, the vibration device 10-1 according to one embodiment of the present specification can output sound with a sound pressure of 55 dB to 91 dB in the frequency band of 200 Hz to 20 kHz and a flatness of about 35 dB.

[0042] According to one embodiment of the present specification, when the vibrating member includes a convex curved portion, the vibrating element 11 can have a larger elastic modulus than the elastic modulus of the adhesive member 12. As a result, the vibrating device 10-1 according to one embodiment of the present specification can have high reliability in sound reproduction by bending the vibrating member to include the convex curved portion and the corresponding curved portion. Furthermore, in the vibrating device 10-1 according to one embodiment of the present specification, the adhesive member 12 improves the adhesion between the vibrating element 11 and the vibrating member, and vibration of the vibrating element 11 is transmitted to the vibrating member via the adhesive member 12, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by the vibration of the vibrating member.

[0043] According to one embodiment of the present specification, if the elastic modulus of the adhesive member 12 is greater than the elastic modulus of the vibration element 11, the vibration element 11 is less likely to warp into a shape corresponding to the convex curved portion of the vibration member via the adhesive member 12, and the adhesion between the vibration element 11 and the vibration member via the adhesive member 12 may be reduced, which may reduce the reliability of sound reproduction of the vibration device 10-1 and reduce the acoustic characteristics and / or sound pressure characteristics in the low-frequency range.

[0044] The vibration device 10-1 according to an embodiment of the present specification may further include a first auxiliary member 10a and a second auxiliary member 10b.

[0045] The first auxiliary member 10a may be configured to protect the vibration element 11. For example, the first auxiliary member 10a may be disposed on the first surface (S1) of the vibration element 11. For example, the first auxiliary member 10a may be configured to cover the entire first surface (S1) of the vibration element 11. The first auxiliary member 10a may prevent or minimize damage to the vibration element 11 from external impact, or prevent contamination or damage to the vibration element 11 from external foreign matter. For example, the first auxiliary member 10a may be expressed by terms such as a first release film, a first release sheet, a first release member, a first release film, or a first release sheet, and examples of the present specification are not limited thereto.

[0046] The second auxiliary member 10b may be configured to protect the adhesive member 12. For example, the second auxiliary member 10b may be disposed on the second surface of the adhesive member 12. For example, the second auxiliary member 10b may be configured to cover the entire second surface of the adhesive member 12. The second auxiliary member 10b may prevent or minimize damage to the adhesive member 12 from external impact, or may prevent contamination or damage to the adhesive member 12 from external foreign objects. Furthermore, the second auxiliary member 10b may maintain the adhesiveness (or tackiness) of the adhesive member 12 by preventing natural hardening of the adhesive member 12. For example, the second auxiliary member 10b may be expressed by terms such as a second release film, a second release sheet, a second release member, a second release film, or a second release sheet, and examples of the present specification are not limited to these terms.

[0047] According to one embodiment of the present specification, when the vibration device 10-1 is placed (or installed) on the vibration member, the first auxiliary member 10a can be peeled off from the vibration element 11, and the second auxiliary member 10b can be peeled off from the adhesive member 12. For example, the second auxiliary member 10b can be peeled off from the adhesive member 12 immediately before the assembly process of connecting or bonding the vibration device 10-1 to the vibration member, and the first auxiliary member 10a can be peeled off from the vibration element 11 after the assembly process of the vibration device 10-1, or can be left bonded to the vibration element 11 without being peeled off.

[0048] Such a vibration device 10-1 according to an embodiment of the present specification can be applied to vibrate a vibration member that is relatively larger and has a lower hardness than the vibration element 11 and includes a curved portion, because the vibration element 11 has a larger elastic modulus than the adhesive member 12. For example, if the vibration element 11 has a smaller elastic modulus than the adhesive member 12, there is a limit to the ability of the vibration element 11 to vibrate a vibration member that is relatively large and has a lower hardness but includes a curved portion, due to a decrease in adhesion between the vibration element 11 and the vibration member that is relatively large and has a lower hardness but includes a curved portion.

[0049] Therefore, in the vibration device 10-1 according to one embodiment of the present specification, the vibration element 11 has an elastic modulus greater than that of the adhesive member 12, and therefore can easily vibrate a vibration member that is relatively larger than the vibration element 11, has low hardness, and includes various curved portions, thereby improving the reliability of sound reproduction and improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by the vibration of the vibration member.

[0050] Fig. 3 is an exploded perspective view showing a vibration device according to another embodiment of the present specification, and Fig. 4 is a cross-sectional view taken along line BB' shown in Fig. 3.

[0051] 3 and 4, a vibration device 10-2 according to another embodiment of the present specification can include a vibration element 11, a reinforcing member 13, an intermediate adhesive member 14, and an adhesive member 12.

[0052] The vibration element 11 is substantially the same as the vibration element 11 shown in FIGS. 1 and 2, so it is given the same reference numeral and redundant description thereof will be omitted.

[0053] The reinforcing member 13 may be disposed below the vibration element 11. For example, the reinforcing member 13 may be disposed on the second surface (S2) of the vibration element 11. For example, the reinforcing member 13 may be coupled or bonded to the second surface (S2) of the vibration element 11 by an intermediate adhesive member 14.

[0054] The reinforcing member 13 according to one embodiment of the present specification may have a larger size or a larger area than the vibration element 11. For example, the reinforcing member 13 may have a larger size than each of the vibration element 11 and the intermediate adhesive member 14. The center of the vibration element 11 may be located or aligned with the center of the reinforcing member 13.

[0055] The intermediate adhesive member 14 (or second adhesive member) may be disposed between the vibration element 11 and the reinforcing member 13. The first surface (or top surface) of the intermediate adhesive member 14 may be connected or bonded to the second surface (S2) of the vibration element 11. The second surface (or back surface) of the intermediate adhesive member 14 may be connected or bonded to the first surface (or top surface) 13a of the reinforcing member 13. The intermediate adhesive member 14 may have the same size as the vibration element 11. For example, the intermediate adhesive member 14 may include the same material or the same structure as the adhesive member 12 shown in FIGS. 1 and 2, and redundant description thereof may be omitted.

[0056] The adhesive member 12 (or first adhesive member) may be connected to or bonded to a second surface (or back surface) 13b that is different from (or opposite to) the first surface (or top surface) of the reinforcing member 13. For example, the adhesive member 12 may have the same size as the reinforcing member 13. For example, the adhesive member 12 may be connected to or bonded to the entire second surface 13b of the reinforcing member 13, but is not limited thereto, and may be connected to or bonded to at least a portion of the second surface 13b of the reinforcing member 13. The adhesive member 12 is substantially the same as the adhesive member 12 shown in FIGS. 1 and 2 except that it is connected to or bonded to the second surface 13b of the reinforcing member 13 instead of the vibration element 11. Therefore, the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0057] According to one embodiment of the present specification, the vibration element 11 can have an elastic modulus greater than the elastic modulus of each of the adhesive member 12, the intermediate adhesive member 14, and the reinforcing member 13, or the elastic modulus can be the same as the elastic modulus of each of the adhesive member 12 and the intermediate adhesive member 14 and greater than the elastic modulus of the reinforcing member 13, so that the vibration of the vibration element 11 can be bent into a curved shape and the vibration of the vibration element 11 can be transmitted to the vibrating member. For example, the vibration element 11 can have an elastic modulus greater than that of the reinforcing member 13 and the same as or greater than that of each of the adhesive member 12 and the intermediate adhesive member 14.

[0058] According to one embodiment of the present specification, the reinforcing member 13 may include a non-metallic material or a composite non-metallic material having material properties suitable for allowing the vibrating element 11 to bend into a curved shape and transmitting the vibration of the vibrating element 11 to the vibrating member. For example, the reinforcing member 13 may include a non-metallic material or a composite non-metallic material having a hardness equal to or greater than that of the vibrating member. For example, the non-metallic material or composite non-metallic material may include one or more of plastic, fiber, leather, wood, cloth, and paper, and the embodiment of the present specification is not limited thereto.

[0059] Therefore, when the vibrating member includes a convex curved portion, the vibrating element 11 can have a larger elastic modulus than the reinforcing member 13 and the same or larger elastic modulus as each of the adhesive member 12 and the intermediate adhesive member 14. As a result, the vibrating device 10-2 according to another embodiment of the present specification can be bent to include a curved portion corresponding to the convex curved portion of the vibrating member, thereby achieving high reliability in sound reproduction. Furthermore, the vibrating device 10-2 according to another embodiment of the present specification has improved adhesion between the vibrating element 11 and the vibrating member via the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12. Vibration of the vibrating element 11 is transmitted to the vibrating member via the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12, thereby improving the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by vibration of the vibrating member. For example, the vibrating device 10-2 according to another embodiment of the present specification can output sound with a sound pressure of 53 dB to 86 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of approximately 33 dB.

[0060] According to one embodiment of the present specification, if the elastic coefficient of at least one of the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12 is greater than the elastic coefficient of the vibration element 11, the vibration element 11 will have difficulty bending into a shape corresponding to the convex curved portion of the vibration member, and the adhesion between the vibration element 11 and the vibration member mediated by the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12 may be reduced, thereby reducing the reliability of sound reproduction of the vibration device 10-2 and reducing the acoustic characteristics and / or sound pressure characteristics in the low-frequency range.

[0061] A vibration device 10-2 according to another embodiment of the present specification may further include a first auxiliary member 10a and a second auxiliary member 10b.

[0062] The first auxiliary member 10a may be disposed on the first surface (S1) of the vibration element 11. For example, the first auxiliary member 10a may be configured to cover the entire first surface (S1) of the vibration element 11. The first auxiliary member 10a is substantially the same as the first auxiliary member 10a shown in FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description may be omitted.

[0063] The second auxiliary member 10b may be disposed on the second surface of the adhesive member 12. For example, the second auxiliary member 10b may be configured to cover the entire second surface of the adhesive member 12. The second auxiliary member 10b is substantially the same as the second auxiliary member 10b shown in FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description may be omitted.

[0064] In the vibration device 10-2 according to another embodiment of this specification, the vibration element 11 is larger than the reinforcing member 13 and has an elastic modulus equal to or larger than that of the adhesive member 12 and the intermediate adhesive member 14, and as shown in Figures 1 and 2, the vibration member, which is relatively larger than the vibration element 11, has low hardness, and includes various curved portions, can be easily vibrated, thereby improving the reliability of sound reproduction and improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by the vibration of the vibration member.

[0065] Fig. 5 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. Fig. 6 is a cross-sectional view taken along line C-C' shown in Fig. 5. Figs. 5 and 6 show vibration devices in which the reinforcing member of the vibration device 10-2 shown in Figs. 3 and 4 has been changed. Therefore, in the following description, redundant descriptions of the remaining same components, excluding the reinforcing member and the components related thereto, may be omitted or simplified.

[0066] 5 and 6, a vibration device 10-3 according to another embodiment of the present specification may include a vibration element 11, a reinforcing member 13, an intermediate adhesive member 14, and an adhesive member 12.

[0067] The vibration element 11 is substantially the same as the vibration element 11 shown in FIGS. 3 and 4, and therefore the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0068] The reinforcing member 13 may be disposed under a rear edge portion of the vibration element 11. For example, the reinforcing member 13 may be disposed on an edge portion of the second surface (S2) of the vibration element 11. For example, the reinforcing member 13 may be connected or bonded to the edge portion of the second surface (S2) of the vibration element 11 by an intermediate adhesive member 14. For example, the reinforcing member 13 may have an area smaller than that of the vibration element 11.

[0069] The reinforcing member 13 according to an embodiment of the present specification may include holes 13h. The holes 13h may overlap the remaining portion of the vibration element 11 excluding the edge portions. The holes 13h may be configured to penetrate the reinforcing member 13 along the thickness direction (Z) of the reinforcing member 13. The center of the holes 13h may be located at or aligned with the center of the vibration element 11. The holes 13h may have a shape corresponding to the shape of the vibration element 11. For example, the holes 13h may have a rectangular band or rectangular ring shape, although the embodiment of the present specification is not limited thereto. For example, the area occupied by the holes 13h in the reinforcing member 13 may be the same as or larger than the remaining area excluding the holes 13h. For example, the area occupied by the holes 13h in the reinforcing member 13 may be one or more times the remaining area excluding the holes 13h, although the embodiment of the present specification is not limited thereto. For example, the hole 13h may be expressed by terms such as an opening, a hollow portion, or a through portion, and the examples of the present specification are not limited thereto.

[0070] 5 and 6 show the reinforcing member 13 having one hole 13h, but this is not limited thereto, and the reinforcing member 13 may include multiple holes 13h. The multiple holes 13h may include circular, elliptical, or polygonal shapes, and the embodiments of the present specification are not limited thereto. Therefore, the reinforcing member 13 according to an embodiment of the present specification may include one or more holes 13h. For example, the one or more holes 13h may include circular, elliptical, or polygonal shapes, and the embodiments of the present specification are not limited thereto. The area occupied by the one or more holes 13h in the reinforcing member 13 may be one or more times the remaining area excluding the one or more holes 13h, and the embodiments of the present specification are not limited thereto.

[0071] The reinforcing member 13 according to one embodiment of the present specification is disposed on the edge portion of the vibration element 11 or on the periphery of the vibration element 11, thereby making it possible to maintain a constant flatness of sound pressure across the reproduction frequency band of sound generated by the vibration of the vibration element 11. For example, the flatness of sound pressure can represent the deviation between the maximum sound pressure (or peak sound pressure) and the minimum sound pressure (or dip sound pressure) in the reproduction frequency band of sound. For example, the reinforcing member 13 functions as a mass disposed on the edge portion of the vibration element 11, thereby increasing the sound pressure from the low-frequency band to the mid-frequency band of sound generated by the vibration of the vibration element 11, thereby improving the flatness of sound pressure across the reproduction frequency band of sound. For example, the reinforcing member 13 can be disposed on the edge portion of the vibration element 11, thereby improving the acoustic characteristics and / or sound pressure characteristics in the high-frequency band. As a result, the vibration device 10-3 according to another embodiment of the present specification can be applied to devices requiring high-frequency sound.

[0072] The intermediate adhesive member 14 (or the second adhesive member) may be connected or bonded to the vibration element 11 and the reinforcing member 13. For example, the intermediate adhesive member 14 may be disposed between the vibration element 11 and the reinforcing member 13. The first surface (or top surface) of the intermediate adhesive member 14 may be connected or bonded to the second surface (S2) of the vibration element 11. The second surface (or back surface) of the intermediate adhesive member 14 may be connected or bonded to the first surface (or top surface) 13a of the reinforcing member 13. The intermediate adhesive member 14 may have the same size as the vibration element 11. For example, the intermediate adhesive member 14 according to one embodiment of the present specification may include the same material or structure as the adhesive member 12 shown in FIGS. 1 and 2, and redundant description thereof may be omitted.

[0073] The intermediate adhesive member 14 according to one embodiment of the present specification may be inserted into one or more holes 13h formed in the reinforcing member 13. For example, the intermediate adhesive member 14 may fill at least a portion of the one or more holes 13h formed in the reinforcing member 13. For example, the intermediate adhesive member 14 may fill the entirety of the one or more holes 13h formed in the reinforcing member 13. For example, the intermediate adhesive member 14 may be configured to surround the second surface 13b of the reinforcing member 13 and the remaining portion excluding the outer surface.

[0074] According to one embodiment of the present specification, the reinforcing member 13 and the intermediate adhesive member 14 may be realized as a single body (or integrated structure). According to one embodiment of the present specification, the reinforcing member 13 may be integrated with the intermediate adhesive member 14 by being inserted (or embedded) into an edge portion of the intermediate adhesive member 14. According to another embodiment of the present specification, the intermediate adhesive member 14 may be integrated with the reinforcing member 13 by surrounding the second surface 13b of the reinforcing member 13 and the remaining portion excluding the outer surface. The integrated reinforcing member 13 and intermediate adhesive member 14 may be realized as a single component constituting the vibration device 10-3, which may facilitate the manufacturing process of the vibration device 10-3.

[0075] The adhesive member 12 (or the first adhesive member) may be connected or bonded to the reinforcing member 13. For example, the adhesive member 12 may be connected or bonded to the second surface (or back surface) 13b of the reinforcing member 13. For example, the adhesive member 12 may have the same size as the vibration element 11. For example, the adhesive member 12 may be connected or bonded to the second surface 13b of the reinforcing member 13 and the intermediate adhesive member 14. The adhesive member 12 is substantially the same as the adhesive member 12 shown in FIGS. 1 and 2 except that it is connected or bonded to the second surface 13b of the reinforcing member 13 and the intermediate adhesive member 14 instead of the vibration element 11. Therefore, the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0076] The adhesive member 12 according to one embodiment of the present disclosure may be inserted into one or more holes 13h formed in the reinforcing member 13. For example, the adhesive member 12 may fill at least a portion of one or more holes 13h formed in the reinforcing member 13. For example, the adhesive member 12 may fill the entirety of one or more holes 13h formed in the reinforcing member 13. The adhesive member 12 may be connected or bonded to an intermediate adhesive member 14 through one or more holes 13h formed in the reinforcing member 13. For example, the adhesive member 12 and the intermediate adhesive member 14 may be connected or bonded to each other through one or more holes 13h formed in the reinforcing member 13.

[0077] According to one embodiment of the present specification, the reinforcing member 13 may be realized as a single body (or an integrated structure) with the adhesive member 12 instead of the intermediate adhesive member 14. According to one embodiment of the present specification, the reinforcing member 13 may be disposed on the edge portion of the adhesive member 14 and integrated with the adhesive member 12. According to another embodiment of the present specification, the adhesive member 12 may be integrated with the reinforcing member 13 by surrounding the first surface 13a of the reinforcing member 13 and the remaining portion excluding the outer surface. The integrated reinforcing member 13 and adhesive member 12 may be realized as a single component constituting the vibration device 10-3, which may facilitate the manufacturing process of the vibration device 10-3.

[0078] According to one embodiment of the present specification, the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12 may be realized as a single body (or integrated structure). For example, the reinforcing member 13 may be disposed or embedded between the adhesive member 12 and the intermediate adhesive member 14. For example, the adhesive member 12 and the intermediate adhesive member 14 may be connected or bonded to each other so as to surround the remaining portion of the reinforcing member 13 except for the outer surface. The integrated intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12 may be realized as a single component constituting the vibration device 10-3, which may further facilitate the manufacturing process of the vibration device 10-3.

[0079] A vibration device 10-3 according to another embodiment of the present specification may further include a first auxiliary member 10a and a second auxiliary member 10b.

[0080] The first auxiliary member 10a may be disposed on the vibration element 11. For example, the first auxiliary member 10a may be disposed on the first surface (S1) of the vibration element 11. For example, the first auxiliary member 10a may be configured to cover the entire first surface (S1) of the vibration element 11. The first auxiliary member 10a is substantially the same as the first auxiliary member 10a shown in FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description thereof may be omitted.

[0081] The second auxiliary member 10b may be disposed on the adhesive member 12. For example, the second auxiliary member 10b may be disposed on the second surface of the adhesive member 12. For example, the second auxiliary member 10b may be configured to cover the entire second surface of the adhesive member 12. The second auxiliary member 10b is substantially the same as the second auxiliary member 10b shown in FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description may be omitted.

[0082] 3 and 4, the vibration device 10-3 according to another embodiment of the present specification can improve the reliability of sound reproduction, can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibrating member, can maintain or improve the flatness of sound pressure in the sound reproduction frequency range, and can simplify the manufacturing process due to the integrated structure of the components. For example, the vibration device 10-3 according to another embodiment of the present specification can output sound with a sound pressure of 53 dB to 86 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 33 dB.

[0083] Fig. 7 is an exploded perspective view showing a vibration device according to another embodiment of the present specification. Fig. 8 is a cross-sectional view taken along line D-D' shown in Fig. 7. Figs. 7 and 8 show a configuration in which the reinforcing member is modified from the vibration device 10-3 shown in Figs. 5 and 6. Therefore, in the following description, redundant descriptions of the remaining same components, excluding the reinforcing member and the components related thereto, may be omitted or simplified.

[0084] 7 and 8, in a vibration device 10-4 according to another embodiment of the present specification, the reinforcing member 13 may be disposed below the central portion (or middle portion) of the vibration element 11. For example, the reinforcing member 13 may be disposed in the central portion of the second surface (S2) of the vibration element 11. For example, the reinforcing member 13 may be connected or bonded to the central portion of the second surface (S2) of the vibration element 11, excluding the edge portions (or peripheral portions), by an intermediate adhesive member 14. For example, the reinforcing member 13 may have a smaller area or size than the vibration element 11.

[0085] The reinforcing member 13 according to an embodiment of the present specification is disposed in the central portion of the vibration element 11, thereby making it possible to maintain a constant level of sound pressure in the reproduction frequency band of sound generated by vibration of the vibration element 11. For example, the reinforcing member 13 functions as a mass disposed in the central portion of the vibration element 11, thereby increasing the sound pressure from the low frequency band to the mid frequency band of sound generated by vibration of the vibration element 11, thereby improving the level of sound pressure in the reproduction frequency band of sound. For example, the reinforcing member 13 may be disposed in the central or center portion of the vibration element 11, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency band.

[0086] The intermediate adhesive member 14 (or the second adhesive member) may be connected or bonded to the vibration element 11 and the reinforcing member 13. For example, the intermediate adhesive member 14 may be disposed between the vibration element 11 and the reinforcing member 13. The first surface (or top surface) of the intermediate adhesive member 14 may be connected or bonded to the second surface (S2) of the vibration element 11. The second surface (or back surface) of the intermediate adhesive member 14 may be connected or bonded to the first surface (or top surface) 13a and the side surface 13c of the reinforcing member 13. The intermediate adhesive member 14 may have the same size as the vibration element 11. For example, the intermediate adhesive member 14 may be configured to surround the remaining first surface 13a and the side surface 13c of the reinforcing member 13, excluding the second surface 13b. The intermediate adhesive member 14 according to an embodiment of the present specification may include the same material or structure as the adhesive member 12 described with reference to FIGS. 1 and 2, and redundant description thereof may be omitted.

[0087] According to one embodiment of the present specification, the reinforcing member 13 and the intermediate adhesive member 14 may be realized as a single body (or integrated structure). According to one embodiment of the present specification, the reinforcing member 13 may be inserted (or embedded) into the center portion of the intermediate adhesive member 14 and integrated with the intermediate adhesive member 14. According to another embodiment of the present specification, the intermediate adhesive member 14 may be integrated with the reinforcing member 13 by surrounding the first surface 13a and the side surface 13c of the reinforcing member 13 except for the second surface 13b. The integrated reinforcing member 13 and intermediate adhesive member 14 may be realized as a single component constituting the vibration device 10-4, which may facilitate the manufacturing process of the vibration device 10-4.

[0088] The adhesive member 12 (or the first adhesive member) may be connected or bonded to the reinforcing member 13. For example, the adhesive member 12 may be connected or bonded to the second surface (or back surface) 13b of the reinforcing member 13. For example, the adhesive member 12 may have the same size as the vibration element 11. For example, the adhesive member 12 may be connected or bonded to the second surface 13b of the reinforcing member 13 and the intermediate adhesive member 14. The adhesive member 12 is substantially the same as the adhesive member 12 described with reference to FIGS. 1 and 2, except that it is connected or bonded to the second surface 13b of the reinforcing member 13 and the intermediate adhesive member 14 instead of the vibration element 11. Therefore, the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0089] The adhesive member 12 according to one embodiment of the present specification can surround at least a portion of the side surface 13c of the reinforcing member 13. For example, the adhesive member 12 can surround the entire side surface 13c of the reinforcing member 13. The adhesive member 12 can be connected or bonded to the intermediate adhesive member 14 at the edge portion of the vibration element 11. For example, the adhesive member 12 and the intermediate adhesive member 14 can be connected or bonded to each other at the edge portion of the vibration element 11. For example, at least one of the adhesive member 12 and the intermediate adhesive member 14 can surround at least a portion of the side surface 13c of the reinforcing member 13.

[0090] According to one embodiment of the present specification, the reinforcing member 13 may be realized as a single body (or an integrated structure) with the adhesive member 12 instead of the intermediate adhesive member 14. According to one embodiment of the present specification, the reinforcing member 13 may be disposed in the center portion of the adhesive member 14 and integrated with the adhesive member 12. According to another embodiment of the present specification, the adhesive member 12 may be integrated with the reinforcing member 13 by surrounding the second surface 13b and the side surface 13c of the reinforcing member 13 except for the first surface 13a. The integrated reinforcing member 13 and adhesive member 12 may be realized as a single component constituting the vibration device 10-4, which may facilitate the manufacturing process of the vibration device 10-4.

[0091] According to one embodiment of the present specification, the intermediate adhesive member 14, the reinforcing member 13, and the adhesive member 12 may be realized as a single body (or integrated structure). For example, the reinforcing member 13 may be disposed or embedded between the adhesive member 12 and the intermediate adhesive member 14. For example, the adhesive member 12 and the intermediate adhesive member 14 may be connected or bonded to each other with the reinforcing member 13 sandwiched between them so as to completely surround the reinforcing member 13. The integrated intermediate adhesive member 14, reinforcing member 13, and adhesive member 12 may be realized as a single component constituting the vibration device 10-4, which may further facilitate the manufacturing process of the vibration device 10-4.

[0092] A vibration device 10-4 according to another embodiment of the present specification may further include a first auxiliary member 10a and a second auxiliary member 10b.

[0093] The first auxiliary member 10a may be disposed on the vibration element 11. For example, the first auxiliary member 10a may be disposed on the first surface (S1) of the vibration element 11. For example, the first auxiliary member 10a may be configured to cover the entire first surface (S1) of the vibration element 11. The first auxiliary member 10a is substantially the same as the first auxiliary member 10a described with reference to FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description may be omitted.

[0094] The second auxiliary member 10b may be disposed on the adhesive member 12. For example, the second auxiliary member 10b may be disposed on the second surface of the adhesive member 12. For example, the second auxiliary member 10b may be configured to cover the entire second surface of the adhesive member 12. The second auxiliary member 10b is substantially the same as the second auxiliary member 10b described with reference to FIGS. 1 and 2, and therefore the same reference numerals will be used therefor, and redundant description will be omitted.

[0095] 5 and 6, the vibration device 10-4 according to another embodiment of the present specification can improve the reliability of sound reproduction, can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibrating member, can maintain or improve the flatness of sound pressure in the sound reproduction frequency range, and can simplify the manufacturing process due to the integrated structure of the components. For example, the vibration device 10-4 according to another embodiment of the present specification can output sound with a sound pressure of 53 dB to 86 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 33 dB.

[0096] Fig. 9 is a perspective view showing a vibration device according to another embodiment of the present specification. Fig. 10 is a cross-sectional view taken along line E-E' shown in Fig. 9. Figs. 9 and 10 show vibration device 10-1 described with reference to Figs. 1 and 2, further comprising a vibration plate and a support member.

[0097] 9 and 10, a vibration device 10-5 according to another embodiment of the present specification may include a vibration element 11, an adhesive member 12, a vibration plate 15, and a support member 17.

[0098] The vibration element 11 is substantially the same as the vibration element 11 described with reference to FIGS. 1 and 2, and therefore the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0099] The adhesive member 12 may be connected or bonded to either one of the first surface (S1) and the second surface (S2) different from (or opposite to) the first surface (S1) of the vibration element 11. The adhesive member 12 is substantially the same as the adhesive member 12 described with reference to Figures 1 and 2, and therefore the same reference numerals are used therefor, and redundant description may be omitted.

[0100] The diaphragm 15 may be connected or coupled to the vibration element 11. For example, the diaphragm 15 may be disposed on the second surface (or back surface) (S2) of the vibration element 11. For example, the diaphragm 15 may be connected or coupled to the second surface (S2) of the vibration element 11 by an adhesive member 12. For example, the first surface of the diaphragm 15 may be connected or coupled to the second surface (S2) of the vibration element 11 by an adhesive member 12.

[0101] The diaphragm 15 according to an embodiment of the present specification may include a plate-like structure having a thickness of 0.1 mm to 2 mm, but the embodiment of the present specification is not limited thereto. For example, the plate-like structure may have a thickness of less than 0.1 mm or greater than 2 mm. For example, the diaphragm 15 may have a rectangular shape, but is not limited thereto, and may include a non-rectangular, circular, elliptical, or polygonal shape. The diaphragm 15 may have a larger size or a larger area than the vibration element 11. For example, the center of the vibration element 11 may overlap with the center of the diaphragm 15. For example, the center of the vibration element 11 may be located or aligned with the center of the diaphragm 15. However, the embodiment of the present specification is not limited thereto. For example, the center of the vibration element 11 may not be aligned with the center of the diaphragm 15.

[0102] The diaphragm 15 according to an embodiment of the present specification can vibrate due to the vibration of the vibration element 11. For example, the diaphragm 15 can vibrate due to the vibration of the vibration element 11 to generate or output sound (or vibration sound). The diaphragm 15 can include material properties suitable for outputting the acoustic characteristics and / or sound pressure characteristics required for the vibration element 11 or the vibration device 10-5. The diaphragm 15 according to an embodiment of the present specification can include a metal material or a non-metal material (or a composite non-metal material). For example, the metal material of the diaphragm 15 can include any one or more of stainless steel, aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and a magnesium-lithium (Mg-Li) alloy, but the embodiment of the present specification is not limited thereto. The non-metal material (or a composite non-metal material) of the diaphragm 15 can include one or more of plastic, fiber, leather, wood, cloth, and paper, but the embodiment of the present specification is not limited thereto. For example, a diaphragm 15 made of plastic or metal can output sound with a sound pressure of 60 dB or more in the frequency range of 21 Hz to 21 kHz through vibration. For example, a diaphragm 15 made of paper can output sound with a sound pressure of 60 dB or more in the frequency range of 210 Hz to 21 kHz through vibration. For example, the material of the diaphragm 15 can be changed to one optimized for the acoustic characteristics required of the vibration device 10-5, and thus, the vibration device 10-5 according to other embodiments of this specification can output sound in the required frequency range simply by changing the material of the diaphragm 15.

[0103] The support member 17 may be connected to or coupled to the diaphragm 15. For example, the support member 17 may be connected to or coupled to an edge portion of a second surface of the diaphragm 15 that is different (or opposite) from the first surface. For example, the support member 17 may be connected to or coupled to a vibrating member to support the diaphragm 15 to which the vibration element 11 is coupled. For example, the support member 17 may be disposed between the diaphragm 15 and the vibrating member, thereby separating the diaphragm 15 and the vibrating member from each other. For example, because the diaphragm 15 is separated from the vibrating member by the support member 17, it may not come into direct contact with the vibrating member, which may prevent or minimize degradation of acoustic characteristics and / or sound pressure characteristics due to contact between the diaphragm 15 and the vibrating member. For example, the support member 17 may be expressed by terms such as a jig, a support jig, a fixing member, a fixing fixture, a fixing bracket, or a fixing frame, and examples of the present specification are not limited to these terms.

[0104] The support member 17 according to an embodiment of the present disclosure may include holes 17h. For example, the support member 17 according to an embodiment of the present disclosure may include, but is not limited to, a square band or square ring shape including the holes 17h. The support member 17 may have a shape corresponding to the shape of the diaphragm 15. For example, the support member 17 may include a material that can stably support the diaphragm 15 without affecting the vibration of the diaphragm 15. For example, the support member 17 may include one or more of a metal material or a non-metal material (or a composite non-metal material), but the embodiment of the present disclosure is not limited thereto. For example, the material of the support member 17 may include one or more of a metal, a plastic, and a wood, but the embodiment of the present disclosure is not limited thereto.

[0105] A vibration device 10-5 according to another embodiment of the present specification may further include a connecting member 16. For example, the vibration device 10-5 may further include a connecting member 16 disposed between the vibration plate 15 and the support member 17.

[0106] The connecting member 16 may be disposed between an edge portion of the second surface of the diaphragm 15 and the support member 17. For example, the support member 17 may be connected or coupled to the diaphragm 15 via the connecting member 16. For example, a first surface of the connecting member 16 may be connected or coupled to an edge portion of the second surface of the diaphragm 15. A second surface of the connecting member 16, which is different from (or opposite to) the first surface, may be connected or coupled to the support member 17.

[0107] The connecting member 16 according to an embodiment of the present disclosure may be configured to minimize or prevent vibrations of the diaphragm 15 from being transmitted to the support member 17. The connecting member 16 may include material properties suitable for isolating vibrations. For example, the connecting member 16 may include an elastic material. For example, the connecting member 16 may include an elastic material for vibration absorption (or shock absorption). The connecting member 16 according to an embodiment of the present disclosure may be made of a polyurethane material or a polyolefin material, but the embodiment of the present disclosure is not limited thereto. The connecting member 16 according to an embodiment of the present disclosure may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, and a double-sided cushion tape, but the embodiment of the present disclosure is not limited thereto.

[0108] The connecting member 16 according to an embodiment of the present specification may be configured to have a thickness relatively greater than that of the diaphragm 15. For example, the connecting member 16 may have a thickness that can minimize or prevent transmission of vibrations of the diaphragm 15 to the support member 17. The connecting member 16 can minimize or prevent transmission of vibrations of the diaphragm 15 to the support member 17 by absorbing the vibrations of the diaphragm 15 through its thickness and elasticity. In addition, the connecting member 16 can prevent physical contact (or friction) between the diaphragm 15 and the support member 17, thereby preventing the generation of noise (or noises) due to physical contact (or friction) between the diaphragm 15 and the support member 17. For example, the connecting member 16 may be expressed by terms such as an intermediate member, a buffer member, an elastic member, a damping member, a vibration absorbing member, or a vibration isolating member, and the embodiments of the present specification are not limited to these terms.

[0109] The connecting member 16 according to another embodiment of the present specification may be configured to minimize or prevent the vibration of the diaphragm 15 from being transmitted to the support member 17 and to reduce reflection of incident sound waves generated by the vibration of the diaphragm 15. For example, the connecting member 16 according to another embodiment of the present specification may include a first connecting member 16a and a second connecting member 16b.

[0110] The first connecting member 16a may be disposed between the diaphragm 15 and the support member 17 so as to be surrounded by the second connecting member 16b. For example, the first connecting member 16a may be disposed inside (or at the center of) the second connecting member 16b. The first connecting member 16a may be configured to have a lower hardness than the second connecting member 16b. For example, the first connecting member 16a may include double-sided polyurethane tape, double-sided polyurethane foam tape, double-sided sponge tape, or the like, and examples of the present specification are not limited thereto.

[0111] The second connecting member 16b may be disposed between the diaphragm 15 and the support member 17 so as to surround the first connecting member 16a. For example, the second connecting member 16b may be disposed on the outer side (or front side) of the first connecting member 16a. The second connecting member 16b may be configured to have a higher hardness than the first connecting member 16a. For example, the second connecting member 16b may include a double-sided polyolefin tape, a double-sided polyolefin foam tape, a double-sided acrylic tape, a double-sided acrylic foam tape, or the like, and examples of the present specification are not limited thereto.

[0112] The connecting member 16 according to another embodiment of the present specification can absorb incident sound generated by the vibration of the diaphragm 15 by the relatively soft first connecting member 16a disposed inside the relatively hard second connecting member 16b, thereby minimizing the reflected sound (or reflected waves) generated by the connecting member 16. This can reduce the maximum and minimum sound pressures generated in the reproduction frequency band of sound generated by the vibration of the vibration element 11, thereby improving the flatness of the sound pressure.

[0113] In a connecting member 16 according to yet another embodiment of the present specification, a relatively hard second connecting member 16b may be disposed inside a relatively soft first connecting member 16a. In this case, sound pressure can be reduced in specific frequency bands. For example, sound pressure can be reduced in the 2-5 kHz and 7-12 kHz frequency bands due to reflected sound (or reflected waves) generated by the relatively hard second connecting member 16b. Therefore, if sound pressure reduction in the 2-5 kHz and 7-12 kHz frequency bands is required depending on the shape and size of the diaphragm 15, the relatively hard second connecting member 16b may be disposed inside the relatively soft first connecting member 16a. The reduction in sound pressure in the 2-5 kHz and 7-12 kHz frequency bands generated by the second connecting member 16b can improve the flatness of the sound pressure.

[0114] A vibration device 10-5 according to another embodiment of the present specification may further include a coupling member 18 coupled to the support member 17.

[0115] The coupling member 18 may be connected or coupled to the back surface of the support member 17. For example, the coupling member 18 may be configured to be able to connect or couple the support member 17 or the vibration device 10-5 to any one of the vibration member and the peripheral mechanisms arranged around the vibration member.

[0116] 1 and 2 except that the coupling member 18 according to one embodiment of the present specification is connected to or coupled to the back surface of the support member 17 instead of the vibration element 11. Therefore, the same reference numerals are used and a redundant description thereof will be omitted. The coupling member 18 according to other embodiments of the present specification is substantially the same as the coupling member 16 or the first coupling member 16a of the coupling member 16. Therefore, a redundant description thereof will be omitted. Therefore, the support member 17 or the vibration device 10-5 may be connected to or coupled to any one of the vibration member and the peripheral mechanisms disposed around the vibration member via the coupling member 18.

[0117] According to one embodiment of the present specification, the connecting member 16 and the coupling member 18 may be integrated with the support member 17. The integrated connecting member 16, support member 17, and coupling member 18 may be realized as a single component that constitutes the vibration device 10-5, which may facilitate the manufacturing process of the vibration device 10-5.

[0118] A vibration device 10-5 according to another embodiment of the present specification may further include a first auxiliary member that covers the entire first surface (S1) of the vibration element 11, and a second auxiliary member that covers the coupling member 18. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to Figures 1 and 2, so a duplicated description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to Figures 1 and 2, so a duplicated description thereof will be omitted.

[0119] Such a vibration device 10-5 according to another embodiment of the present specification can output sound by vibration of the diaphragm 15 due to vibration of the vibration element 11, and can improve acoustic characteristics and / or sound pressure characteristics by including the diaphragm 15 made of a material optimized for the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibration element 11. Furthermore, the vibration device 10-5 according to another embodiment of the present specification can be connected to or fixed to the vibration member via the support member 17, thereby minimizing the contact area (or fixing area) with the vibration member, and thus can be easily connected to or fixed to a vibration member including a curved portion.

[0120] Additionally, the vibration device 10-5 according to other embodiments of the present specification may further include one or more pads 19 disposed on the edge portion of the diaphragm 15.

[0121] The one or more pads 19 may be arranged on an edge portion of the second surface of the diaphragm 15. The one or more pads 19 may be arranged to face the vibration element 11. For example, the one or more pads 19 may protrude from the connecting member 16 toward the vibration element 11, although the embodiments of the present specification are not limited thereto. For example, the one or more pads 19 may be arranged on an edge portion of the first surface of the diaphragm 15 to face the vibration element 11.

[0122] A vibration device 10-5 according to another embodiment of the present specification may include, but is not limited to, four pads 19 protruding or arranged from each side of the connecting member 16 toward the center of the vibration element 11. For example, one or more pads 19 may be arranged on each side of the connecting member 16. For example, the one or more pads 19 arranged on each side of the connecting member 16 may be arranged symmetrically with respect to the vibration element 11. For example, the one or more pads 19 may include a pointed end facing the vibration element 11.

[0123] According to an embodiment of the present specification, one or more pads 19 may be made of a polyurethane or polyolefin material, but the embodiment of the present specification is not limited thereto. For example, one or more pads 19 may include a single-sided tape, a single-sided foam tape, a single-sided cushion tape, or a single-sided sponge tape, but the embodiment of the present specification is not limited thereto.

[0124] According to one embodiment of the present disclosure, one or more pads 19 can trap reflected waves to reduce the reduction in sound pressure caused by standing waves. For example, sound waves (or sound vibrations) generated when the diaphragm 15 is vibrated by the vibration element 11 propagate radially from the vibration element 11. These sound waves can be called progressive waves. These progressive waves are reflected by the connecting member 16 to form reflected waves that propagate in the opposite direction to the progressive waves. These reflected waves can overlap and interfere with the progressive waves, forming standing waves in which the overlapped sound waves cannot move forward and remain stationary. These standing waves can reduce sound pressure and degrade acoustic characteristics. Therefore, one or more pads 19 can trap reflected waves to prevent or minimize the reduction in sound pressure caused by standing waves, which are generated by the interference between the reflected waves and the progressive waves.

[0125] The vibration device 10-5 according to another embodiment of the present specification may further include one or more pads 19, thereby further improving the acoustic characteristics and / or sound pressure characteristics.

[0126] Fig. 11 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Fig. 11 shows a modification of the support member shown in Fig. 9. Therefore, in the following description, except for the support member and its related components, the same reference numerals will be used for the remaining components, and redundant description thereof will be omitted.

[0127] Referring to FIG. 11, in a vibration device 10-5 according to another embodiment of the present specification, the support member 17 can include a bending structure for ensuring the rigidity of the vibration device 10-5.

[0128] The support member 17 according to an embodiment of the present disclosure may include a first support portion 17a, a second support portion 17b, and a third support portion 17c.

[0129] The first support portion 17a may be connected or coupled to an edge portion of the second surface of the diaphragm 15. For example, the first support portion 17a may be connected or coupled to an edge portion of the second surface of the diaphragm 15 via a connecting member 16. The first support portion 17a may have a square band or square ring shape including a hole 17h, but is not limited thereto, and may have a shape corresponding to the shape of the diaphragm 15.

[0130] The second support portion 17b may be disposed parallel to the first support portion 17a. For example, the second support portion 17b may be disposed below the first support portion 17a so as to be parallel to the first support portion 17a. For example, the second support portion 17b may be disposed so as not to overlap the first support portion 17a. For example, the second support portion 17b may be disposed across from the first support portion 17a. For example, the second support portion 17b may be disposed in a shape that surrounds the first support portion 17a.

[0131] The third support portion 17c can be connected or coupled between the first support portion 17a and the second support portion 17b, thereby increasing the rigidity of the support member 17. The third support portion 17c can be connected or coupled between a first side of the first support portion 17a and a second side of the second support portion 17b. For example, the first side of the third support portion 17c can be connected or coupled to the first side of the first support portion 17a, and the second side of the third support portion 17c can be connected or coupled to the second side of the second support portion 17b. Therefore, the connecting portion (or bending portion) between the first side of the first support portion 17a and the first side of the third support portion 17c and the connecting portion (or bending portion) between the second side of the second support portion 17b and the second side of the third support portion 17c can increase the rigidity of the support member 17, thereby allowing the support member 17 to support the diaphragm 15 more stably.

[0132] According to an embodiment of the present specification, the third support portion 17c may be configured between the first support portion 17a and the second support portion 17b so as to be parallel to the third direction (or the thickness direction of the diaphragm) (Z) or inclined from the third direction (Z). For example, the third support portion 17c may be bent at an angle of 90 degrees or less from a first side of the first support portion 17a so as to be parallel to the third direction (Z). The second support portion 17b may be bent at an angle of 90 degrees from a second side of the third support portion 17c so as to be parallel to the first direction (X) or the second direction (Y). For example, the angle (θ1) between the first support portion 17a and the third support portion 17c may be less than 90 degrees or may be an acute angle.

[0133] According to one embodiment of the present specification, in the support member 17, the angle (θ1) between the first support portion 17a and the third support portion 17c is an acute angle, and the first support portion 17a and the second support portion 17b do not overlap each other, so that the sound generated by the vibration of the diaphragm 15 can travel downward on the diaphragm 15 without being reflected by the second support portion 17b and / or the third support portion 17c, thereby preventing or minimizing the generation of noise or noise due to the reflected sound (or reflected waves) reflected by the second support portion 17b and / or the third support portion 17c. For example, when the angle (θ1) between the first support portion 17a and the third support portion 17c is an obtuse angle and the first support portion 17a and the second support portion 17b overlap each other, part of the sound generated by the vibration of the diaphragm 15 is reflected by the second support portion 17b and / or the third support portion 17c, generating noise or noise, which may reduce the acoustic characteristics and / or sound pressure characteristics.

[0134] A vibration device 10-5 according to another embodiment of the present specification may further include a coupling member 18 coupled to the rear surface of the support member 17.

[0135] The coupling member 18 may be connected to or coupled to the second support portion 17b of the support member 17. For example, the coupling member 18 may be configured to be able to connect or couple the support member 17 or the vibration device 10-5 to any one of the vibration member and the peripheral mechanisms arranged around the vibration member.

[0136] The coupling member 18 according to one embodiment of the present specification may be connected to or coupled to the rear surface of the second support portion 17b of the support member 17. For example, the coupling member 18 is substantially the same as the adhesive member 12 shown in FIGS. 1 and 2 except that it is connected to or coupled to the second support portion 17b of the support member 17 instead of the vibration element 11, and therefore a redundant description thereof will be omitted. The coupling member 18 according to other embodiments of the present specification is substantially the same as the connecting member 16 or the first connecting member 16a of the connecting member 16, and therefore a redundant description thereof will be omitted. Therefore, the support member 17 or the vibration device 10-5 may be connected to or coupled to any one of the vibration member and the peripheral mechanisms disposed around the vibration member via the coupling member 18. For example, according to one embodiment of the present specification, the connecting member 16 and the coupling member 18 may be integrated with the support member 17. The integrated connecting member 16, support member 17, and coupling member 18 can be realized as one component that constitutes the vibration device 10-5, which can facilitate the manufacturing process of the vibration device 10-5.

[0137] The coupling member 18 according to other embodiments of the present specification may include one or more screws or bolts fastened to the second support portion 17b of the support member 17. For example, the threads of the coupling member 18 may pass through the second support portion 17b of the support member 17 and be fastened to or coupled to any one of the vibrating member and a peripheral mechanism disposed around the vibrating member. For example, an elastic member may be disposed between the second support portion 17b of the support member 17 and the vibrating member (or the peripheral mechanism). The elastic member may be configured to block or minimize vibrations transmitted from the support member 17 to the vibrating member (or the peripheral mechanism).

[0138] A vibration device 10-5 according to another embodiment of the present specification may further include a first auxiliary member covering the entire first surface (S1) of the vibration element 11, and a second auxiliary member covering the rear surface of the coupling member 18. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to Figures 1 and 2, and therefore the same reference numerals will be used therefor, and a repeated description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to Figures 1 and 2, and therefore the same reference numerals will be used therefor, and a repeated description thereof will be omitted.

[0139] Such a vibration device 10-5 according to another embodiment of this specification, like the vibration device 10-5 described with reference to Figures 9 and 10, can output sound by vibrating the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, and can be easily connected to or fixed to a vibration member including a curved portion.

[0140] Fig. 12 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Fig. 12 shows a modification of the support member shown in Fig. 9 or 11. Therefore, in the following description, except for the support member and related components, the same reference numerals will be used for the remaining components, and redundant description thereof will be omitted.

[0141] Referring to FIG. 12, in a vibration device 10-5 according to another embodiment of the present specification, the support member 17 can include a bending structure for ensuring the rigidity of the vibration device 10-5 and a protective structure for protecting the vibration element 11.

[0142] The support member 17 according to an embodiment of the present disclosure may include a first support portion 17a, a second support portion 17b, and a third support portion 17c.

[0143] The first support portion 17a may be connected or coupled to an edge portion of the second surface of the diaphragm 15. For example, the first support portion 17a may be connected or coupled to an edge portion of the second surface of the diaphragm 15 via a connecting member 16. The first support portion 17a may have a square band or square ring shape including a hole 17h, but is not limited thereto, and may have a shape corresponding to the shape of the diaphragm 15.

[0144] The second support portion 17b may be disposed parallel to the first support portion 17a. For example, the second support portion 17b may be disposed above the first support portion 17a so as to be parallel to the first support portion 17a. For example, the second support portion 17b may be disposed so as not to overlap the first support portion 17a. For example, the second support portion 17b may be disposed so as to cross the first support portion 17a. For example, the second support portion 17b may be disposed in a shape that surrounds the first support portion 17a.

[0145] The third support portion 17c can be connected or coupled between the first support portion 17a and the second support portion 17b, thereby increasing the rigidity of the support member 17. The third support portion 17c can be connected or coupled between a first side of the first support portion 17a and a second side of the second support portion 17b. For example, the first side of the third support portion 17c can be connected or coupled to the first side of the first support portion 17a, and the second side of the third support portion 17c can be connected or coupled to the second side of the second support portion 17b. Therefore, the connecting portion (or bending portion) between the first side of the first support portion 17a and the first side of the third support portion 17c and the connecting portion (or bending portion) between the second side of the second support portion 17b and the second side of the third support portion 17c can increase the rigidity of the support member 17, thereby allowing the support member 17 to support the diaphragm 15 more stably.

[0146] According to an embodiment of the present specification, the third support portion 17c may be configured between the first support portion 17a and the second support portion 17b so as to be parallel to the third direction (or the thickness direction of the diaphragm) (Z) or inclined from the third direction (Z). For example, the third support portion 17c may be bent at an angle of 90 degrees or less from a first side of the first support portion 17a so as to be parallel to the third direction (Z). The second support portion 17b may be bent at an angle of 90 degrees from a second side of the third support portion 17c so as to be parallel to the first direction (X) or the second direction (Y). For example, the angle between the first support portion 17a and the third support portion 17c may be less than 90 degrees or may be an acute angle.

[0147] The third support portion 17c according to an embodiment of the present specification may be configured between the first support portion 17a and the second support portion 17b so as to surround each side surface of the connecting member 16, the diaphragm 15, the adhesive member 12, and the vibration element 11. For example, the height of the third support portion 17c, based on the third direction (or the thickness direction of the diaphragm) (Z), may be greater than the height between the rear surface of the connecting member 16 and the first surface (S1) of the vibration element 11. For example, the height of the third support portion 17c may protrude above the first surface (S1) of the vibration element 11 to prevent physical contact between an external structure and the vibration element 11, thereby allowing the first surface (S1) of the vibration element 11 to be disposed below the second support portion 17b. For example, based on the third direction (Z), the third support portion 17c can be connected to the first support portion 17a so as to surround the vibration element 11, or can be bent from the first support portion 17a to define a storage space on the first support portion 17a. As a result, the connecting member 16, the diaphragm 15, the adhesive member 12, and the vibration element 11 can be protected from external impact by being stored or accommodated in the storage space defined on the first support portion 17a by the third support portion 17c.

[0148] According to one embodiment of the present specification, the support member 17 or the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member via the coupling member 18. For example, the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member by the coupling member 18 fastened to or coupled to the second support portion 17b of the support member 17.

[0149] A vibration device 10-5 according to another embodiment of the present specification may further include a first auxiliary member coupled to the coupling member 18 to cover the first surface (S1) of the vibration element 11, and a second auxiliary member coupled to the first support portion 17a of the support member 17 to cover the back surface of the diaphragm 15. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted.

[0150] 10 or 11, the vibration device 10-5 according to another embodiment of the present specification can output sound by vibration of the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, and can be easily connected to or fixed to a vibration member including a curved surface. Furthermore, the vibration device 10-5 according to another embodiment of the present specification can prevent damage to the vibration element 11 from external impacts and can be slimmed down by reducing the overall thickness, by including a support member 17 configured to surround the sides of the vibration element 11 and the diaphragm 15.

[0151] Figure 13 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Figure 13 is configured by combining the support members shown in Figure 11 or 12. Therefore, in the following description, except for the support members and related components, the remaining components will be given the same reference numerals, and redundant description thereof will be omitted.

[0152] Referring to FIG. 13, in a vibration device 10-5 according to another embodiment of the present specification, the support member 17 can include a bending structure for ensuring the rigidity of the vibration device 10-5 and a protective structure for protecting the vibration element 11.

[0153] The support member 17 according to an embodiment of the present disclosure may include a first support portion 17a, a second support portion 17b, a third support portion 17c, a fourth support portion 17d, and a fifth support portion 17e.

[0154] Since the first support portion 17a, the second support portion 17b, and the third support portion 17c are substantially identical to the first support portion 17a, the second support portion 17b, and the third support portion 17c of the support member 17 described with reference to FIG. 11, the same reference numerals are used therefor, and redundant description thereof may be omitted.

[0155] The fourth support portion 17d may be arranged parallel to the third direction (or the thickness direction of the diaphragm) (Z) and may be connected or joined to the first support portion 17a. For example, the fourth support portion 17d may extend from the third support portion 17c along the third direction (Z).

[0156] According to an embodiment of the present specification, the fourth support portion 17d may be connected or coupled to the first support portion 17a so as to surround each side of the connecting member 16, the diaphragm 15, the adhesive member 12, and the vibration element 11. For example, the height of the fourth support portion 17d, based on the third direction (Z), may be greater than the height between the rear surface of the connecting member 16 and the first surface (S1) of the vibration element 11. For example, the height of the fourth support portion 17d may protrude above the first surface (S1) of the vibration element 11 to prevent physical contact between an external structure and the vibration element 11, and thus the first surface (S1) of the vibration element 11 may be disposed above and below the fourth support portion 17d. For example, the fourth support portion 17d may be connected to the first support portion 17a so as to surround the vibration element 11, thereby defining a storage space above the first support portion 17a. As a result, each of the connecting member 16, the vibration plate 15, the adhesive member 12, and the vibration element 11 can be protected from external impact by being stored or accommodated in the storage space defined on the first support portion 17a by the fourth support portion 17d.

[0157] The fifth support portion 17e may be disposed parallel to and facing the second support portion 17b. For example, the fifth support portion 17e may be connected to the fourth support portion 17d so as to face the second support portion 17b. For example, the fifth support portion 17e may be disposed so as not to overlap with the first support portion 17a but to overlap with the second support portion 17b.

[0158] Fifth support portion 17e is bent from the second side of fourth support portion 17d so as to face second support portion 17b, thereby increasing the rigidity of support member 17. Therefore, the connecting portion (or bent portion) between the first side of first support portion 17a and the first side of third support portion 17c, the connecting portion (or bent portion) between the second side of second support portion 17b and the second side of third support portion 17c, the connecting portion between the first side of first support portion 17a and the first side of fourth support portion 17d, and the connecting portion (or bent portion) between the second side of fourth support portion 17d and the second side of fifth support portion 17e can increase the rigidity of support member 17, thereby enabling support member 17 to support diaphragm 15 more stably.

[0159] According to one embodiment of the present specification, the support member 17 or the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member via the coupling member 18. For example, the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member by the coupling member 18 fastened to or coupled to the second support portion 17b of the support member 17.

[0160] A vibration device 10-5 according to another embodiment of the present specification may further include a first auxiliary member coupled to the coupling member 18 to cover the first surface (S1) of the vibration element 11, and a second auxiliary member coupled to the first support portion 17a of the support member 17 to cover the back surface of the diaphragm 15. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted.

[0161] 10 or 11, the vibration device 10-5 according to another embodiment of the present specification can output sound by vibration of the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, and can be easily connected to or fixed to a vibration member including a curved surface. Furthermore, the vibration device 10-5 according to another embodiment of the present specification can prevent damage to the vibration element 11 from external impact by including a support member 17 configured to surround the sides of the vibration element 11 and the diaphragm 15.

[0162] Fig. 14 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Fig. 14 shows a modification of the support member shown in Fig. 11. Therefore, in the following description, redundant descriptions of the remaining components, excluding the support member and the components related thereto, can be omitted.

[0163] Referring to Figure 14, a vibration device 10-5 according to another embodiment of this specification can include a bending structure for ensuring the rigidity of the vibration device 10-5, a protective structure for protecting the vibration element 11, and a vibration suppression structure for the support member 17.

[0164] The support member 17 according to an embodiment of the present disclosure may include a first support portion 17a, a second support portion 17b, and a vibration isolation portion 17f.

[0165] Since the first support portion 17a and the second support portion 17b are substantially identical to the first support portion 17a and the second support portion 17b of the support member 17 described with reference to FIG. 11, the same reference numerals are used therefor, and redundant description thereof may be omitted.

[0166] According to one embodiment of the present specification, the first support portion 17a and the second support portion 17b may be arranged to have a step between them in the third direction (Z) with the vibration isolating portion 17f sandwiched therebetween. For example, the second support portion 17b may be arranged below the first support portion 17a. This separates the first support portion 17a of the support member 17 from the vibrating member, thereby preventing physical contact between the first support portion 17a and the vibrating member, and preventing the acoustic characteristics generated by the vibration of the diaphragm 15 from being degraded by noise (or noise) caused by physical contact between the first support portion 17a and the vibrating member.

[0167] The vibration isolating portion 17f can be configured to increase the rigidity of the support member 17 and suppress vibration of the support member 17 caused by vibration of the vibration element 11.

[0168] According to one embodiment of the present specification, the vibration isolating portion 17f may be configured between the first support portion 17a and the second support portion 17b to include one or more bent portions for increasing the rigidity of the support member 17. For example, the vibration isolating portion 17f may be disposed between the first support portion 17a and the second support portion 17b to surround the side surface of the vibration element 11. For example, the vibration isolating portion 17f may protrude convexly along the third direction (Z) between the first support portion 17a and the second support portion 17b to surround the side surface of the vibration element 11. For example, the vibration isolating portion 17f may have a rectangular shape, a trapezoidal shape, or a convex curved shape. Therefore, when the vibration element 11 vibrates, the vibration isolating portion 17f suppresses or minimizes the transmission of vibrations transmitted to the first support portion 17a via the connecting member 16 to the second support portion 17b, thereby preventing or minimizing the transmission of vibrations of the vibration plate 15 to the vibration element.

[0169] According to one embodiment of the present specification, the height of the vibration isolating portion 17f, based on the third direction (Z), may be greater than the height between the rear surface of the connecting member 16 and the first surface (S1) of the vibration element 11. For example, the height of the vibration isolating portion 17f may protrude above the first surface (S1) of the vibration element 11 to prevent physical contact between an external structure and the vibration element 11, and thus the first surface (S1) of the vibration element 11 may be disposed above and below the vibration isolating portion 17f. For example, the vibration isolating portion 17f may be connected to the first support portion 17a to surround the vibration element 11, thereby defining a storage space on the first support portion 17a. As a result, the connecting member 16, the diaphragm 15, the adhesive member 12, and the vibration element 11 may be housed or accommodated in the storage space defined on the first support portion 17a by the vibration isolating portion 17f, and thus protected from external impact.

[0170] According to one embodiment of the present specification, the support member 17 or the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member via the coupling member 18. For example, the vibration device 10-5 may be connected or coupled to any one of the vibration member and the peripheral mechanisms arranged around the vibration member by the coupling member 18 fastened to or coupled to the second support portion 17b of the support member 17.

[0171] A vibration device 10-5 according to another embodiment of the present specification may further include a first auxiliary member coupled to vibration-isolating portion 17f of support member 17 to cover first surface (S1) of vibration element 11, and a second auxiliary member coupled to coupling member 18 to cover the rear surface of diaphragm 15. The first auxiliary member is substantially the same as first auxiliary member 10a described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted. The second auxiliary member is substantially the same as second auxiliary member 10b described with reference to FIGS. 1 and 2, so a redundant description thereof will be omitted.

[0172] 11, the vibration device 10-5 according to another embodiment of the present specification can output sound through vibration of the diaphragm 15, and can have improved acoustic and / or sound pressure characteristics. It can be easily connected to or fixed to a vibrating member including a curved surface, and damage to the vibration element 11 from external impact can be prevented. Furthermore, the vibration device 10-5 according to another embodiment of the present specification can further improve acoustic and / or sound pressure characteristics by preventing or minimizing vibration of the diaphragm 15 from being transmitted to the vibrating member using the vibration-isolating portion 17f of the support member 17. For example, the vibration device 10-5 according to another embodiment of the present specification can output sound with a sound pressure of 56 dB to 84 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 28 dB.

[0173] 15 is a cross-sectional view showing a vibration device according to another embodiment of the present specification, in which an enclosure is further configured in addition to the vibration device shown in FIG.

[0174] Referring to FIG. 15, a vibration device 10-6 according to another embodiment of the present specification may include a vibration element 11, an adhesive member 12, a vibration plate 15, a support member 17, one or more pads 19, and an enclosure 20.

[0175] Each of the vibration element 11, adhesive member 12, vibration plate 15, support member 17, and one or more pads 19 is substantially identical to each of the vibration element 11, adhesive member 12, vibration plate 15, support member 17, and one or more pads 19 described with reference to Figures 9 and 10, so the same drawing symbols will be used therefor and redundant explanations thereof will be omitted.

[0176] A vibration device 10-6 according to another embodiment of the present specification may further include an enclosure 20 coupled to the diaphragm 15 and surrounding the vibration element 11.

[0177] The enclosure 20 may be connected or coupled to an edge portion of the first surface of the diaphragm 15 so as to cover the vibration element 11. For example, the enclosure 20 may be connected or coupled to an edge portion of the first surface of the diaphragm 15 via a coupling member 21. The enclosure 20 may form a sealed space (CS) on the first surface of the diaphragm 15 that covers or surrounds the vibration element 11. For example, the enclosure 20 may be expressed by terms such as a sealing member, a sealing cap, a sealing box, or a sound box, and examples of the present specification are not limited to these. The sealed space (CS) may be expressed by terms such as an air gap, a vibration space, an acoustic space, or a sound box, and examples of the present specification are not limited to these.

[0178] The enclosure 20 may include a lid (or ceiling or bottom) 20u that covers the vibration element 11, and sidewalls 20s that are connected to the lid 20u and define a sealed space (CS). The sidewalls 20s of the enclosure 20 may be connected or coupled to the diaphragm 15 via a coupling member 21. For example, the enclosure 20 may have a box shape with a sealed space (CS) that is open on one side, although the embodiments of the present specification are not limited thereto. For example, the enclosure 20 may have a shape that is the same as or different from the shape of the vibration element 11. For example, if the vibration element 11 has a square shape, the enclosure 20 may include a square shape that is relatively larger than the vibration element 11, but is not limited thereto, and may have a polygonal shape that can cover or surround the vibration element 11, or a non-rectangular shape, including a circular or elliptical shape. For example, the enclosure 20 can include, but is not limited to, one or more of a metallic material or a non-metallic material (or a composite non-metallic material). For example, the enclosure 20 can include, but is not limited to, one or more of a metal, a plastic, and a wood.

[0179] The enclosure 20 according to an embodiment of the present specification can maintain a constant impedance component due to air acting on the diaphragm 15 when the diaphragm 15 vibrates. For example, the air surrounding the diaphragm 15 resists the vibration of the diaphragm 15 and acts as an impedance component having resistance and reactance components that vary depending on the frequency. As a result, the enclosure 20 forms a sealed space (CS) surrounding the vibration element 11 on the first surface of the diaphragm 15, thereby maintaining a constant impedance component (or air impedance or elastic impedance) acting on the diaphragm 15 due to air, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range and improving the sound quality of the high frequency range.

[0180] Although FIG. 15 illustrates the enclosure 20 as having a sealed structure, the enclosure 20 is not limited thereto, and may be configured to have a base-reflex or open-baffle structure.

[0181] A vibration device 10-6 according to another embodiment of the present specification may further include a first auxiliary member coupled to the lid 20u of the enclosure 20, and a second auxiliary member coupled to the coupling member 18 so as to cover the rear surface of the diaphragm 15. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to Figures 1 and 2, so a redundant description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to Figures 1 and 2, so a redundant description thereof will be omitted.

[0182] Alternatively, each of the support member 17, the connecting member 16, and the joining member 18 shown in FIG. 15 may be changed to each of the support member 17, the connecting member 16, and the joining member 18 shown in any one of FIGS. 11 to 14, and redundant explanations therefor may be omitted.

[0183] 9 and 10, the vibration device 10-6 according to another embodiment of the present specification can output sound by vibration of the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, and can be easily connected to or fixed to a vibration member including a curved surface. Furthermore, the vibration device 10-6 according to another embodiment of the present specification can have improved acoustic characteristics and / or sound pressure characteristics in the low frequency range and improved sound quality in the high frequency range by using the enclosure 20. For example, the vibration device 10-6 according to another embodiment of the present specification can output sound with a sound pressure of 30 dB to 66 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 36 dB.

[0184] Fig. 16 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Fig. 16 shows the vibration device shown in Fig. 15 to which an elastic connecting member is further added. Therefore, in the following description, the same reference numerals will be used for the remaining components, excluding the elastic connecting member and its related components, and redundant description thereof will be omitted.

[0185] Referring to FIG. 16, a vibration device 10-6 according to another embodiment of the present disclosure may further include one or more elastic coupling members 22.

[0186] The one or more elastic coupling members 22 may be configured to prevent or minimize vibration (or trembling) of the enclosure 20 due to pressure in the enclosed space (CS) caused by vibration of the vibrating element 11 or the diaphragm 15. For example, the one or more elastic coupling members 22 may prevent or minimize degradation of acoustic characteristics and / or sound pressure characteristics caused by noise (or noise) generated by vibration (or trembling) of the enclosure 20 caused by vibration of the vibrating element 11 or the diaphragm 15.

[0187] According to an embodiment of the present specification, one or more elastic coupling members 22 may be configured or coupled between the diaphragm 15 and the enclosure 20. For example, the one or more elastic coupling members 22 may be coupled between an edge portion of the diaphragm 15 and the enclosure 20. For example, the one or more elastic coupling members 22 may be coupled between the diaphragm 15 and a lid portion 20u of the enclosure 20 facing the vibration element 11. In the one or more elastic coupling members 22, a first side may be coupled or connected to an inner surface of the lid portion 20u of the enclosure 20, and a second side different from (or opposite to) the first side may be coupled to the diaphragm 15.

[0188] The one or more elastic connecting members 22 can prevent or minimize vibration (or vibration) of the lid portion 20u of the enclosure 20 by connecting the lid portion 20u of the enclosure 20 to the diaphragm 15. Furthermore, the one or more elastic connecting members 22 can prevent or minimize degradation of the acoustic characteristics and / or sound pressure characteristics due to reflected waves generated at the corners and sidewalls of the enclosure 20 and / or the diaphragm 15 by trapping sound waves and / or reflected waves at the corners and sidewalls of the enclosure 20 and / or the diaphragm 15.

[0189] According to an embodiment of the present specification, one or more elastic connecting members 22 may include an elastic material. For example, the one or more elastic connecting members 22 may include an elastic material for vibration absorption (or shock absorption). For example, the one or more elastic connecting members 22 may include one or more of double-sided foam tape, double-sided cushion tape, double-sided sponge tape, double-sided polyurethane tape, and double-sided polyurethane foam tape, although the embodiment of the present specification is not limited thereto. For example, since the one or more elastic connecting members 22 have elasticity, they may be expressed by terms such as vibration suppression member, elastic support, elastic support member, or elastic support portion, although the embodiment of the present specification is not limited thereto.

[0190] According to one embodiment of the present specification, one or more elastic coupling members 22 may be configured on the diaphragm 15 between the sidewall 20s of the enclosure 20 and the vibration element 11. For example, the one or more elastic coupling members 22 may be configured on the diaphragm 15 to overlap with at least a portion of the support member 17 in order to prevent or minimize vibration (or trembling) of the enclosure 20 while being relatively less affected by the vibration of the diaphragm 15.

[0191] According to one embodiment of the present specification, one or more elastic connecting members 22 may be configured to surround the side surfaces of the vibration element 11. For example, the one or more elastic connecting members 22 may be configured in the shape of a closed loop line that surrounds the side surfaces of the vibration element 11. For example, the one or more elastic connecting members 22 may be configured in the shape of a circle, an ellipse, or a polygon.

[0192] According to one embodiment of the present specification, the elastic connecting member 22 having a closed loop line shape may be configured as a single continuous line shape, or may be configured as a plurality of line patterns closely arranged without any gaps along the closed loop line to form the closed loop line shape. For example, if the elastic connecting member 22 has a square shape, the elastic connecting member 22 may include four line patterns facing each of the four sides of the vibration element 11.

[0193] 15, the vibration device 10-6 according to another embodiment of the present specification can output sound by vibration of the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, can be easily connected to or fixed to a vibration member including a curved surface portion, can have improved acoustic characteristics and / or sound pressure characteristics in the low frequency range, and can have improved sound quality in the high frequency range by the enclosure 20. Furthermore, the vibration device 10-6 according to another embodiment of the present specification can prevent or minimize vibration (or vibration) of the enclosure 20 by one or more elastic connecting members 22, and therefore can prevent or minimize deterioration of the acoustic characteristics and / or sound pressure characteristics.

[0194] Fig. 17 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Fig. 17 shows a modification of the enclosure structure in the vibration device shown in Fig. 15. Therefore, in the following description, the same reference numerals will be used for the remaining components except for the enclosure and related components, and redundant description thereof will be omitted.

[0195] Referring to FIG. 17, in a vibration device 10-6 according to another embodiment of the present disclosure, the enclosure 20 can include one or more reinforcing portions 20a, 20b.

[0196] The one or more reinforcing portions 20a, 20b may be configured to increase the rigidity of the enclosure 20. By increasing the rigidity of the enclosure 20, the one or more reinforcing portions 20a, 20b can prevent or minimize vibration (or vibration) of the enclosure 20 due to pressure in the enclosed space (CS) caused by vibration of the vibrating element 11 or the diaphragm 15, thereby preventing or minimizing deterioration in acoustic characteristics and / or sound pressure characteristics due to vibration (or vibration) of the enclosure 20.

[0197] One or more reinforcement portions 20 a , 20 b may be configured on the lid portion 20 u of the enclosure 20 facing the vibration element 11 .

[0198] According to an embodiment of the present specification, one or more reinforcing portions 20a, 20b may protrude from the lid portion 20u of the enclosure 20 toward the vibration element 11, but the embodiment of the present specification is not limited thereto. For example, one or more reinforcing portions 20a, 20b may protrude from the lid portion 20u of the enclosure 20 in a direction different from (or opposite to) the direction toward the vibration element 11.

[0199] The one or more reinforcing portions 20a, 20b according to an embodiment of the present disclosure may be configured in a line shape or a closed loop line shape.

[0200] According to one embodiment of the present specification, the enclosure 20 includes a plurality of reinforcing portions 20a, 20b, each of which may be configured in the form of a line or a closed loop line having a regular interval.

[0201] Each of the plurality of reinforcing portions 20a, 20b according to an embodiment of the present disclosure may be configured in the shape of concentric circles. For example, each of the plurality of reinforcing portions 20a, 20b may be configured in the shape of a circle, an ellipse, or a polygon.

[0202] According to other embodiments of the present disclosure, each of the reinforcing portions 20a, 20b may be configured to intersect with each other, for example, each of the reinforcing portions 20a, 20b may be configured in the shape of a "+", an "X", or an "*".

[0203] Optionally, a vibration device 10-6 according to another embodiment of the present specification may further include one or more elastic connecting members 22 described with reference to Fig. 16. The one or more elastic connecting members 22 may be configured between the diaphragm 15 and the enclosure 20. Since the one or more elastic connecting members 22 are substantially the same as the one or more elastic connecting members 22 described with reference to Fig. 16, the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0204] 15 or 16, the vibration device 10-6 according to other embodiments of the present specification can output sound by vibration of the diaphragm 15, can have improved acoustic characteristics and / or sound pressure characteristics, can be easily connected to or fixed to a vibrating member including a curved surface portion, can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range, and can improve the sound quality of the high frequency range by the enclosure 20. Furthermore, the vibration device 10-6 according to other embodiments of the present specification can have improved acoustic characteristics and / or sound pressure characteristics because vibration (or trembling) of the enclosure 20 is prevented or minimized by one or more reinforcing parts 20a, 20b and / or one or more elastic connecting members 22.

[0205] 18 is a cross-sectional view showing a vibration device according to another embodiment of the present specification, in which a housing is further configured in addition to the vibration device shown in FIG.

[0206] Referring to FIG. 18, a vibration device 10-7 according to another embodiment of the present specification may include a vibration element 11, an adhesive member 12, a diaphragm 15, a support member 17, one or more pads 19, and a housing .

[0207] Each of the vibration element 11, adhesive member 12, vibration plate 15, support member 17, and one or more pads 19 is substantially identical to each of the vibration element 11, adhesive member 12, vibration plate 15, support member 17, and one or more pads 19 described with reference to Figures 9 and 11, so the same drawing symbols will be used for them and redundant explanations can be omitted.

[0208] A vibration device 10-7 according to another embodiment of the present specification may further include a housing 23 that houses or accommodates the vibration element 11, the adhesive member 12, the diaphragm 15, and the support member 17.

[0209] The housing 23 may have a box shape having an internal space 23s for housing or accommodating the vibration element 11, adhesive member 12, diaphragm 15, and support member 17. The housing 23 may include one or more materials selected from a metal material and a non-metal material (or a composite non-metal material), and examples herein are not limited thereto. For example, the housing 23 may include one or more materials selected from a metal, plastic, and wood, and examples herein are not limited thereto. For example, the housing 23 may be expressed by terms such as a case, an outer case, a case member, a housing member, or a cabinet, and examples herein are not limited thereto.

[0210] The housing 23 according to one embodiment of the present disclosure may include a first housing member 23a, a second housing member 23b, and a housing sidewall 23c.

[0211] The first housing member 23a may be disposed on the second surface of the diaphragm 15. For example, the first housing member 23a may be disposed to face the diaphragm 15 and be spaced apart from the diaphragm 15. For example, the first housing member 23a may have a plate shape, although the embodiments of the present specification are not limited thereto.

[0212] The second housing member 23b may be disposed on the first surface of the diaphragm 15. For example, the second housing member 23b may be disposed to face the vibration element 11 and be spaced apart from the vibration element 11. The second housing member 23b may be disposed parallel to the first housing member 23a with the vibration element 11 and the diaphragm 15 interposed therebetween. For example, the second housing member 23b may include a plate shape, although the embodiments of the present specification are not limited thereto.

[0213] The housing sidewall 23c may be connected between the first housing member 23a and the second housing member 23b. The housing sidewall 23c may be connected between an edge portion of the first housing member 23a and an edge portion of the second housing member 23b. A first side (or lower side) of the housing sidewall 23c may be connected to the edge portion of the first housing member 23a, and a second side (or upper side) of the housing sidewall 23c may be connected to the edge portion of the second housing member 23b.

[0214] The housing sidewall 23c may surround the space between the first housing member 23a and the second housing member 23b, thereby providing an interior space 23s in the housing 23. For example, the housing sidewall 23c may be integrated with either the first housing member 23a or the second housing member 23b. For example, the housing sidewall 23c and the first housing member 23a may be integrated into a single body, thereby providing the interior space 23s surrounded by the housing sidewall 23c on the first housing member 23a. For example, the second housing member 23b may be connected or joined to the second side of the housing sidewall 23c using double-sided tape, adhesive, or screws. Therefore, the first housing member 23a, the second housing member 23b, and the housing sidewall 23c may have a box shape.

[0215] According to one embodiment of the present specification, the support member 17 connected to the diaphragm 15 may be connected or coupled to the inner surface of the housing 23 via the coupling member 18. For example, the support member 17 may be connected or coupled to the inner surface of the first housing member 23a facing the diaphragm 15 via the coupling member 18.

[0216] The housing 23 according to one embodiment of the present specification can house or accommodate all of the vibration element 11, adhesive member 12, diaphragm 15, connecting member 16, and support member 17. For example, the coupled configuration (or assembled configuration) between the vibration element 11, adhesive member 12, diaphragm 15, connecting member 16, and support member 17 can be configured as a single part. For example, the coupled configuration between the vibration element 11, adhesive member 12, diaphragm 15, connecting member 16, and support member 17 can be expressed by terms such as acoustic part, acoustic device, acoustic element, sound-generating structure, sound-generating assembly, vibrating part, vibrating assembly, vibration-generating assembly, or vibration-generating structure, and the embodiments of the present specification are not limited to these.

[0217] According to one embodiment of the present specification, an acoustic device configured by combining the vibration element 11, adhesive member 12, diaphragm 15, connecting member 16, and support member 17 can be housed or accommodated in the internal space 23s of the housing 23. As a result, the acoustic device housed in the internal space 23s of the housing 23 can be protected from external impacts by being surrounded by the housing 23. Furthermore, the housing 23 according to one embodiment of the present specification provides the internal space 23s (or a sealed space) around the vibration element 11 and the diaphragm 15, and similarly to the enclosure 20 described with reference to FIGS. 15 to 17, the housing 23 can maintain a constant impedance component due to air acting on the diaphragm 15 when the diaphragm 15 vibrates, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range and improving the sound quality of the high frequency range.

[0218] A vibration device 10-7 according to another embodiment of the present specification may further include one or more holes 23h for effective output of sound generated by vibration of the diaphragm 15.

[0219] One or more holes 23h may be formed in the first housing member 23a of the housing 23. For example, the one or more holes 23h may be formed in the first housing member 23a of the housing 23 so as to overlap the diaphragm 15. For example, the one or more holes 23h may be configured to penetrate the first housing member 23a of the housing 23 along the thickness (or height) direction (Z) of the housing 23. The one or more holes 23h may be a path (or acoustic path, or sound output path) through which sound generated by vibration of the diaphragm 15 is output to the outside. Furthermore, the one or more holes 23h can reduce the pressure (or air pressure) in the internal space 23s of the housing 23, thereby expanding the bass band and thereby improving the acoustic characteristics of the bass band. For example, by lowering the pressure (or air pressure) in the internal space 23s of the housing 23 through one or more holes 23h, the vibration displacement (or bending force) of the diaphragm 15 arranged in the internal space 23s of the housing 23 can be increased, thereby expanding the range of the bass band and improving the acoustic characteristics and / or sound pressure characteristics of the bass band.

[0220] A vibration device 10-7 according to another embodiment of the present specification may include one hole 23h that overlaps with the diaphragm 15 and has a size smaller than that of the diaphragm 15. For example, the one hole 23h may have a shape corresponding to that of the diaphragm 15, but the embodiment of the present specification is not limited thereto. For example, if the diaphragm 15 is rectangular, the one hole 23h may have a rectangular shape that is smaller than that of the diaphragm 15, and the center of the one hole 23h may be located or aligned with the center of the diaphragm 15.

[0221] A vibration device 10-7 according to another embodiment of the present specification may include a plurality of holes 23h overlapping the vibration plate 15 and having a size smaller than the vibration plate 15. For example, each of the plurality of holes 23h may have a circular shape, an elliptical shape, or a slit shape, and the embodiment of the present specification is not limited thereto.

[0222] According to one embodiment of the present disclosure, the plurality of holes 23h may be arranged at regular intervals along one or more of the first direction (X) and the second direction (Y). For example, the plurality of holes 23h may be arranged in a lattice pattern or a radial pattern at regular intervals along the first direction (X) and the second direction (Y), but the embodiment of the present disclosure is not limited thereto. For example, each of the plurality of holes 23h may have the same size, but is not limited thereto, and the size may gradually increase or decrease from the center of the diaphragm 15 to the edge of the diaphragm 15.

[0223] According to one embodiment of the present specification, the density per unit area of ​​the plurality of holes 23h may gradually increase from the center of the diaphragm 15 to the edge portion of the diaphragm 15. For example, if the first housing member 23a includes a first region overlapping the center portion of the diaphragm 15 and a second region overlapping the edge portion of the diaphragm 15, and sound waves (or vibrations) of a first intensity generated by vibration of the diaphragm 15 reach the first region, and sound waves (or vibrations) of a second intensity smaller than the first intensity reach the second region, the density of the plurality of holes 23h arranged in the second region may be greater than the density of the plurality of holes 23h arranged in the first region.

[0224] The vibration device 10-7 according to another embodiment of the present specification may further include one or more elastic coupling members 22.

[0225] One or more elastic connecting members 22 may be connected between the diaphragm 15 and the housing 23. For example, one or more elastic connecting members 22 may be connected between an edge portion of the diaphragm 15 and the second housing member 23b of the housing 23. The one or more elastic connecting members 22 are substantially the same as the elastic connecting members 22 described with reference to Fig. 16 or 17, and therefore the same reference numerals are used therefor, and redundant description thereof will be omitted.

[0226] A vibration device 10-7 according to another embodiment of the present specification may further include a first connecting member connected to the first housing member 23a of the housing 23, a first auxiliary member covering the first connecting member, and a second auxiliary member covering the second housing member 23b of the housing 23.

[0227] The first connecting member may be connected to or coupled to the rear surface of the first housing member 23a. The first connecting member may be coupled to the rear surface of the first housing member 23a while avoiding one or more holes 23h, or may be configured to include one or more other holes that overlap with one or more holes 23h and be coupled to the entire rear surface of the first housing member 23a. For example, the first connecting member may be configured to connect or couple the housing 23 or the vibration device 10-7 to any one of the vibration member and peripheral mechanisms arranged around the vibration member.

[0228] The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to Figures 1 and 2, and therefore a duplicated description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to Figures 1 and 2, except that it is coupled to the second housing member 23b, and therefore a duplicated description thereof will be omitted.

[0229] A vibration device 10-7 according to another embodiment of the present specification may further include a second connecting member disposed between the second housing member 23b of the housing 23 and the second auxiliary member. The second connecting member may be connected to or coupled to the entire front surface of the second housing member 23b. Either the first connecting member or the second connecting member may be omitted depending on the coupling method (or structure) by which the vibration device 10-7 is coupled to one or more of the vibration member and the peripheral mechanism. For example, when the vibration device 10-7 is coupled to or coupled to the vibration member via the first connecting member, the second connecting member may be omitted. And when the vibration device 10-7 is coupled to or coupled to the peripheral mechanism via the second connecting member, the first connecting member may be omitted.

[0230] A vibration device 10-7 according to another embodiment of the present specification may further include a first connecting member connected to the first housing member 23a of the housing 23, a first auxiliary member covering the first connecting member, a second connecting member connected to the second housing member 23b of the housing 23, and a second auxiliary member covering the second connecting member. The first auxiliary member is substantially the same as the first auxiliary member 10a described with reference to Figures 1 and 2, so a redundant description thereof will be omitted. The second auxiliary member is substantially the same as the second auxiliary member 10b described with reference to Figures 1 and 2, so a redundant description thereof will be omitted.

[0231] Additionally, in a vibration device 10-7 according to another embodiment of the present specification, the housing 23 may further include one or more reinforcing portions formed on the second housing member 23b. The one or more reinforcing portions may reinforce the rigidity of the housing 23, thereby further preventing or minimizing vibration (or shaking) of the second housing member 23b due to vibration of the diaphragm 15. The one or more reinforcing portions are substantially the same as the one or more reinforcing portions formed on the enclosure 20 described with reference to FIG. 17, and therefore, a redundant description thereof will be omitted.

[0232] Optionally, in a vibration device 10-7 according to another embodiment of the present specification, the support member 17 may be changed to the support member 17 described with reference to Figures 9 and 10 or the support member 17 described with reference to Figure 14, and a duplicated description thereof may be omitted. Optionally, in a vibration device 10-7 according to another embodiment of the present specification, the support member 17 may be changed to the support member 17 described with reference to Figure 13, and a duplicated description thereof may be omitted. For example, the support member 17 shown in Figure 13 may be connected to the first housing member 23a of the housing 23 shown in Figure 18 via a first connecting member 18a, and may be connected to the second housing member 23b of the housing 23 shown in Figure 18 via a second connecting member 18b.

[0233] In the vibration device 10-7 according to another embodiment of the present specification, the vibration element 11, adhesive member 12, diaphragm 15, connecting member 16, and support member 17 are each housed or accommodated in the internal space 23s of the housing 23, thereby preventing damage to the vibration element 11 due to external impacts, etc., and improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range. Furthermore, the vibration device 10-7 according to another embodiment of the present specification can be easily assembled or connected to the support member and / or peripheral mechanisms.

[0234] Figure 19 is a cross-sectional view showing a vibration device according to another embodiment of the present specification. Figure 19 shows a vibration device in which the support member of the vibration device shown in Figure 18 is replaced with the support member shown in Figure 12. Therefore, in the following description, except for the support member and its related components, the remaining components will be given the same reference numerals, and redundant description thereof will be omitted.

[0235] 19, in a vibration device 10-7 according to another embodiment of the present specification, the support member 17 housed in the internal space 23s of the housing 23 may be connected or coupled to the second housing member 23b of the housing 23. For example, the support member 17 may be connected or coupled to the inner surface of the second housing member 23b via a coupling member 18. Therefore, the support member 17 may be spaced apart from the first housing member 23a of the housing 23, thereby preventing the generation of noise (or vibrations) due to vibrations transmitted to the first housing member 23a via the support member 17 when the diaphragm 15 vibrates.

[0236] The vibration device 10-7 according to another embodiment of the present specification may further include one or more elastic coupling members 22.

[0237] One or more elastic connecting members 22 may be connected between the support member 17 and the housing 23. For example, one or more elastic connecting members 22 may be connected between the support member 17 and the first housing member 23a of the housing 23. The one or more elastic connecting members 22 are substantially the same as the elastic connecting members 22 described with reference to FIG. 16 or 18 except that they are connected between the support member 17 and the first housing member 23a of the housing 23. Therefore, the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0238] Additionally, in a vibration device 10-7 according to another embodiment of the present specification, the housing 23 may further include one or more reinforcing portions formed on the second housing member 23b. The one or more reinforcing portions may reinforce the rigidity of the housing 23, thereby further preventing or minimizing vibration (or shaking) of the second housing member 23b due to vibration of the diaphragm 15. The one or more reinforcing portions are substantially the same as the one or more reinforcing portions formed on the enclosure 20 described with reference to FIG. 17, and therefore, a redundant description thereof will be omitted.

[0239] 18, the vibration device 10-7 according to another embodiment of the present specification can prevent damage to the vibration element 11 due to external impacts, etc., and can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range. Furthermore, the vibration device 10-7 according to another embodiment of the present specification can be easily assembled or connected to a support member and / or peripheral mechanisms.

[0240] Fig. 20 is a perspective view showing a diaphragm according to another embodiment of the present specification. Fig. 21 is a cross-sectional view taken along line F-F' shown in Fig. 20. Figs. 22A and 22B are other cross-sectional views taken along line F-F' shown in Fig. 20. Figs. 20, 21, 22A, and 22B are views of modified embodiments of the diaphragm shown in Figs. 9 to 19.

[0241] 20 and 21, a diaphragm 15 according to another embodiment of the present specification may include a plurality of regions 15A and 15B. For example, the vibration element 11 may overlap one or more of the plurality of regions 15A and 15B.

[0242] Diaphragm 15 according to other embodiments of the present specification may include first region 15A and second region 15B.

[0243] The first region 15A may include a central portion of the diaphragm 15. For example, the first region 15A may include a region where the vibration element 11 is disposed. For example, the first region 15A may be expressed by terms such as a first rigid region, a flat portion, a flat region, or a vibration region, and examples of the present specification are not limited thereto.

[0244] The second region 15B may include a peripheral region of the first region 15A. For example, the second region 15B may include a region between the edge portion of the diaphragm 15 and the first region 15A. The second region 15B may include a region surrounding the first region 15A. The second region 15B may be expressed by terms such as a second rigid region, a flexure, a non-flat region, a bending region, a bellows region, an elastic region, a deformation region, a pleated region, or a stretchable region, and examples of the present specification are not limited thereto.

[0245] The second region 15B according to an embodiment of the present disclosure may include one or more bent portions 15b1 and 15b2. The one or more bent portions 15b1 and 15b2 may be configured in the shape of a closed loop line surrounding the first region 15A.

[0246] According to one embodiment of the present specification, the second region 15B may include a plurality of bent portions 15b1 and 15b2 configured in the shape of a closed loop line surrounding the first region 15A. For example, the second region 15B may include a first bent portion 15b1 surrounding the first region 15A and a second bent portion 15b2 surrounding the first bent portion 15b1. For example, the second region 15B may have lower rigidity than the first region 15A due to the one or more bent portions (or multiple bent portions) 15b1 and 15b2.

[0247] According to one embodiment of the present specification, one or more bent portions (or multiple bent portions) 15b1, 15b2 may protrude from the second region 15B of the diaphragm 15 onto the first surface of the diaphragm 15 based on the thickness direction (Z) of the diaphragm 15. The one or more bent portions (or multiple bent portions) 15b1, 15b2 may protrude convexly to include a curved surface. For example, the cross-sectional structure of the second region 15B may have a semicircular or elliptical cross-sectional structure, although the embodiment of the present specification is not limited thereto. For example, the first surface of the diaphragm 15 corresponding to the second region 15B may include one or more convex portions (or protruding portions). The second surface of the diaphragm 15 corresponding to the second region 15B may include one or more concave portions (or recessed portions).

[0248] According to other embodiments of the present specification, one or more bent portions (or a plurality of bent portions) 15b1, 15b2 may be alternately protruded along the first and second surface directions of the diaphragm 15. For example, the one or more bent portions (or a plurality of bent portions) 15b1, 15b2 may have a wave shape as shown in FIG. 22A or a zigzag line shape as shown in FIG. 22B, but is not limited thereto, and the second region 15B may include any structure that can be expanded or contracted.

[0249] According to one embodiment of the present specification, one or more bent portions (or multiple bent portions) 15b1, 15b2 can be deformed by the vibration of diaphragm 15 or first region 15A, thereby increasing the length (or area) of second region 15B. For example, one or more bent portions (or multiple bent portions) 15b1, 15b2 can contract or expand by the vibration of first region 15A, thereby facilitating the vibration of diaphragm 15 or first region 15A. In addition, one or more bent portions (or multiple bent portions) 15b1, 15b2 can trap reflected waves reflected by a connecting member connected to diaphragm 15.

[0250] Diaphragm 15 according to other embodiments of the present specification may be made of a flexible material to allow deformation of one or more bent portions (or a plurality of bent portions) 15b1, 15b2 due to vibration of first region 15A. For example, diaphragm 15 may include one or more of the following materials: plastic, fiber, leather, cloth, and paper. For example, second region 15B of diaphragm 15, i.e., one or more bent portions (or a plurality of bent portions) 15b1, 15b2, may be realized by molding using a mold having a bent portion pattern corresponding to one or more bent portions (or a plurality of bent portions) 15b1, 15b2, but the embodiments of the present specification are not limited thereto.

[0251] In such a diaphragm 15 according to another embodiment of the present specification, the vibration displacement (or bending force) is increased by one or more bending portions 15b1, 15b2, thereby improving the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11.

[0252] Fig. 23 is a perspective view showing a diaphragm according to another embodiment of the present specification. Fig. 24A is a cross-sectional view taken along line G-G' shown in Fig. 23. Fig. 24B is another cross-sectional view taken along line G-G' shown in Fig. 23. Figs. 23, 24A, and 24B are views of another modified embodiment of the diaphragm shown in Figs. 9 to 19.

[0253] 23 and 21, a diaphragm 15 according to another embodiment of the present specification may include a first plate 15-1 and a second plate 15-2. For example, the diaphragm 15 may include a first plate 15-1 and a second plate 15-2 overlapping the first plate 15-1.

[0254] The first plate 15-1 may include a plate-like structure having a certain thickness. According to an embodiment of the present specification, the first plate 15-1 may include one or more materials selected from the group consisting of plastic, fiber, leather, cloth, and paper.

[0255] The second plate 15-2 may be connected or coupled to either the first surface or the second surface opposite the first surface of the first plate 15-1, and may be connected or coupled to the vibration element 11. The second plate 15-2 may have a plate-like structure having a certain thickness and a smaller size than the first plate 15-1. For example, the second plate 15-2 may be connected or coupled to the remaining central portion of the first plate 15-1, excluding the edge portions. The second plate 15-2 according to an embodiment of the present specification may include one or more of a metal material or a non-metal material (or a composite non-metal material), but the embodiment of the present specification is not limited thereto. For example, the metal material of the second plate 15-2 may include one or more of stainless steel, aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and a magnesium-lithium (Mg-Li) alloy, but the embodiment of the present specification is not limited thereto. The non-metallic material (or composite non-metallic material) of the second plate 15-2 may include, but is not limited to, one or more of plastic, fiber, leather, wood, cloth, and paper. For example, the second plate 15-2 may include the same or a different material as the first plate 15-1.

[0256] Diaphragm 15 according to other embodiments of the present specification may include first region 15A and second region 15B.

[0257] The first region 15A may include a central portion of the diaphragm 15. For example, the first region 15A may include a region where the vibration element 11 is disposed. The first region 15A may be a region corresponding to the second plate 15-2, or may be a laminated region of the first plate 15-1 and the second plate 15-2. For example, the first region 15A may be expressed by terms such as a first rigid region, a vibration region, or a multi-layer region, and examples of the present specification are not limited thereto.

[0258] The second region 15B may include a region surrounding the first region 15A. The second region 15B may be included in an edge portion of the diaphragm 15. For example, the second region 15B may include a region between the edge portion of the diaphragm 15 or the first plate 15-1 and the first region 15A. The second region 15B may be expressed in terms such as a second rigid region, an elastic region, or a single-layer region, and examples of the present specification are not limited to these.

[0259] The first region 15A of the diaphragm 15 can have higher rigidity than the second region 15B. For example, the first region 15A of the diaphragm 15 can have higher rigidity than the second region 15B due to the laminated structure (or overlapping structure) of the first plate 15-1 and the second plate 15-2. As a result, the first region 15A of the diaphragm 15 has relatively higher rigidity than the second region 15B, which can prevent or minimize the split vibration of the vibration element 11, thereby improving the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibration element 11.

[0260] The second region 15B of the diaphragm 15 has a stiffness relatively lower than that of the first region 15A, and can be deformed by the vibration of the vibration element 11. As a result, the second region 15B of the diaphragm 15 can improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11 superimposed on the second plate 15-2 by smoothing the vibration of the diaphragm 15 or the first region 15A or by increasing the vibration displacement (or bending force) of the diaphragm 15 or the first region 15A.

[0261] 24B, a diaphragm 15 according to another embodiment of the present specification may further include a third plate 15-3. A diaphragm 15 according to another embodiment of the present specification may further include a third plate 15-3 for further increasing the rigidity of the first region 15A.

[0262] The third plate 15-3 may be configured to overlap the second plate 15-2 with the first plate 15-1 in between. For example, when the second plate 15-2 is connected or joined to a first surface of the first plate 15-1, the third plate 15-3 may be connected or joined to a second surface of the first plate 15-1 opposite to the first surface.

[0263] According to an embodiment of the present specification, the third plate 15-3 may include one or more materials selected from a metallic material and a non-metallic material (or a composite non-metallic material), but the embodiment of the present specification is not limited thereto. For example, the third plate 15-3 may include one or more materials selected from a metallic material and a non-metallic material (or a composite non-metallic material) that are the same as or different from those of the second plate 15-2.

[0264] The first region 15A of the diaphragm 15 has higher rigidity than the second region 15B due to the layered structure (or overlapping structure) of the first to third plates 15-1, 15-2, and 15-3, which can prevent or further minimize the split vibration of the vibration element 11, thereby further improving the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibration element 11.

[0265] The second region 15B of the diaphragm 15 has a relatively lower rigidity than the first region 15A, and can be deformed more greatly by the vibration of the vibration element 11. As a result, the second region 15B of the diaphragm 15 can further improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11 by smoothing the vibration of the diaphragm 15 or the first region 15A or by further increasing the vibration displacement (or bending force) of the diaphragm 15 or the first region 15A.

[0266] 24A and 24B show that first region 15A of diaphragm 15 is configured with a stacked structure (or overlapping structure) of two or three plates, but is not limited thereto, and first region 15A of diaphragm 15 may be configured with a stacked structure (or overlapping structure) of three or more plates. Thus, first region 15A of diaphragm 15 may include a stacked structure (or overlapping structure) of two or more plates.

[0267] In such a diaphragm 15 according to another embodiment of the present specification, the rigidity of the first region 15A where the vibration element 11 is arranged is higher than the rigidity of the second region 15B surrounding the first region 15A, thereby improving the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11. For example, vibration devices 10-5, 10-6, and 10-7 including the diaphragm 15 according to another embodiment of the present specification can output sound with a sound pressure of 56 dB to 85 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 29 dB.

[0268] Fig. 25 is a perspective view showing a diaphragm according to another embodiment of the present specification. Fig. 26 is a cross-sectional view taken along line H-H' shown in Fig. 25. Figs. 25 and 26 show the diaphragm shown in Figs. 23, 24A, and 24B, with the structure of the first plate modified.

[0269] 25 and 26, a diaphragm 15 according to another embodiment of the present specification may include a first plate 15-1 and a second plate 15-2 overlapping the first plate 15-1.

[0270] The first plate 15-1 may have a plate-like structure having a certain thickness and a hollow portion 15h. The first plate 15-1 according to an embodiment of the present specification may include one or more materials selected from the group consisting of plastic, fiber, leather, cloth, and paper, and the embodiment of the present specification is not limited thereto.

[0271] The hollow portion 15h of the first plate 15-1 may be formed in the center portion of the first plate 15-1. The hollow portion 15h may be configured to be larger than the vibration element 11 and smaller than the second plate 15-2.

[0272] The second plate 15-2 may have a plate-like structure having a certain thickness, a size smaller than that of the first plate 15-1, and a size larger than the hollow portion 15h of the first plate 15-1. For example, the second plate 15-2 may be connected or joined to a central portion of the first plate 15-1 so as to cover the hollow portion 15h of the first plate 15-1. According to an embodiment of the present specification, the second plate 15-2 may include one or more of a metal material or a non-metal material (or a composite non-metal material) having higher rigidity than the first plate 15-1, but the present specification is not limited thereto. For example, the metal material of the second plate 15-2 may include one or more of stainless steel, aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and a magnesium-lithium (Mg-Li) alloy, but the present specification is not limited thereto. The non-metallic material (or composite non-metallic material) of the second plate 15-2 may include one or more of plastic, fiber, leather, wood, cloth, and paper, and examples herein are not limited thereto.

[0273] The second plate 15-2 according to one embodiment of the present specification reinforces the mass of the vibration element 11 and reduces the resonant frequency of the vibration element 11 due to the increased mass, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibration element 11 and improving the flatness of the acoustic characteristics.

[0274] Diaphragm 15 according to other embodiments of the present specification may include first region 15A and second region 15B.

[0275] The first region 15A and the second region 15B may include different materials. For example, the first region 15A and the second region 15B may have different rigidities. For example, the first region 15A and the second region 15B may include different materials from metal, plastic, fiber, leather, wood, cloth, and paper, and the embodiments of the present specification are not limited thereto. The rigidity of each of the first region 15A and the second region 15B may increase from the edge portion to the center portion of the vibrating member 150.

[0276] The first region 15A may include a region where the vibration element 11 is disposed. The first region 15A may be a region corresponding to the second plate 15-2, or may be a region including the hollow portion 15h of the first plate 15-1.

[0277] The second region 15B may include a region surrounding the first region 15A. The second region 15B may be included in an edge portion of the diaphragm 15. For example, the second region 15B may include a region between the edge portion of the diaphragm 15 or the first plate 15-1 and the first region 15A.

[0278] The first region 15A of the diaphragm 15 can have higher rigidity than the second region 15B due to the second plate 15-2. Therefore, the first region 15A of the diaphragm 15 has a relatively higher rigidity than the second region 15B, thereby preventing or minimizing the split vibration of the vibration element 11, thereby improving the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibration element 11. Furthermore, the first region 15A of the diaphragm 15 reinforces the mass of the vibration element 11, thereby reducing the resonant frequency of the vibration element 11 due to the increased mass, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibration element 11 and improving the flatness of the acoustic characteristics.

[0279] The second region 15B of the diaphragm 15 has a relatively lower rigidity than the first region 15A, and can be deformed more greatly by the vibration of the vibration element 11. Therefore, the second region 15B of the diaphragm 15 can improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11 by smoothing the vibration of the diaphragm 15 or the first region 15A or by increasing the vibration displacement (or bending force) of the diaphragm 15 or the first region 15A.

[0280] Additionally, the diaphragm 15 according to another embodiment of the present specification may further include a third plate 15-3 (dotted line in FIG. 27). The diaphragm 15 according to another embodiment of the present specification may further include a third plate 15-3 (dotted line in FIG. 27) for further increasing the rigidity of the first region 15A.

[0281] The third plate 15-3 may be configured to overlap the second plate 15-2 with the first plate 15-1 in between. For example, when the second plate 15-2 is connected or joined to a first surface of the first plate 15-1, the third plate 15-3 may be connected or joined to a second surface of the first plate 15-1 opposite to the first surface.

[0282] The third plate 15-3 according to an embodiment of the present specification may include one or more materials selected from a metallic material and a non-metallic material (or a composite non-metallic material), and the embodiment of the present specification is not limited thereto. For example, the third plate 15-3 may include one or more materials selected from a metallic material and a non-metallic material (or a composite non-metallic material) that are the same as or different from the second plate 15-2, and the embodiment of the present specification is not limited thereto.

[0283] The first region 15A of the diaphragm 15 has higher rigidity than the second region 15B due to the laminated structure (or overlapping structure) of the second and third plates 15-2 and 15-3, thereby preventing or further minimizing split vibration of the vibration element 11, thereby further improving the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibration element 11.

[0284] The second region 15B of the diaphragm 15 has a relatively lower rigidity than the first region 15A, and can be deformed more greatly by the vibration of the vibration element 11. As a result, the second region 15B of the diaphragm 15 can further improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11 by smoothing the vibration of the diaphragm 15 or the first region 15A or by further increasing the vibration displacement (or bending force) of the diaphragm 15 or the first region 15A.

[0285] 26 shows that first region 15A of diaphragm 15 is configured with a laminated structure (or overlapping structure) of one plate or two plates, but is not limited thereto, and first region 15A of diaphragm 15 may be configured with a laminated structure (or overlapping structure) of three or more plates. Thus, first region 15A of diaphragm 15 may include a laminated structure (or overlapping structure) of two or more plates.

[0286] In such a diaphragm 15 according to another embodiment of this specification, the rigidity of the first region 15A in which the vibration element 11 is arranged is higher than the rigidity of the second region 15B surrounding the first region 15A, thereby improving the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of the vibration element 11.

[0287] Figure 27 is a perspective view showing a diaphragm according to another embodiment of the present specification. Figure 28 is a cross-sectional view taken along line II' in Figure 27. Figures 27 and 28 show a modification of the first plate structure in the diaphragm shown in Figures 25 and 26. Therefore, in the following description, the same reference numerals will be used for the remaining components except for the first plate and its associated components, and redundant description thereof will be omitted.

[0288] Referring to Figures 27 and 28, in a vibration plate 15 according to another embodiment of the present specification, the first plate 15-1 includes a plate-like structure having a certain thickness, and includes a hollow portion 15h formed in the first region 15A of the vibration plate 15, and one or more bent portions (or multiple bent portions) 15b1, 15b2 formed in the second region 15B of the vibration plate 15.

[0289] The hollow portion 15h of the first plate 15-1 may be formed in the center portion of the first plate 15-1. The hollow portion 15h may be configured to be larger than the vibration element 11 and smaller than the second plate 15-2.

[0290] The one or more bent portions (or multiple bent portions) 15b1, 15b2 may be configured in the shape of a closed loop line surrounding the first region 15A or the hollow portion 15h. For example, the second region 15B may include a first bent portion 15b1 surrounding the first region 15A and a second bent portion 15b2 surrounding the first bent portion 15b1. For example, the second region 15B may have lower rigidity than the first region 15A due to the one or more bent portions (or multiple bent portions) 15b1, 15b2. The one or more bent portions (or multiple bent portions) 15b1, 15b2 are substantially the same as the one or more bent portions (or multiple bent portions) 15b1, 15b2 shown in FIGS. 21, 22A, and 22B, and therefore the same reference numerals will be used to denote them, and redundant description thereof will be omitted.

[0291] One or more bent portions (or multiple bent portions) 15b1, 15b2 can be deformed by the vibration of diaphragm 15. As a result, second region 15B of diaphragm 15 can improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by the vibration of vibration element 11 by smoothing the vibration of diaphragm 15 or first region 15A or increasing the vibration displacement (or bending force) of diaphragm 15 or first region 15A.

[0292] Such diaphragm 15 according to other embodiments of the present specification can improve the acoustic characteristics and / or sound pressure characteristics in the mid-low frequency range generated by vibration of vibration element 11 by increasing the vibration displacement amount (or bending force) by one or more bent portions 15b1, 15b2. For example, vibration devices 10-5, 10-6, and 10-7 including diaphragm 15 according to other embodiments of the present specification can output sound with a sound pressure of 56 dB to 85 dB in the frequency range of 200 Hz to 20 kHz, and a flatness of about 29 dB.

[0293] Fig. 29 is a diagram showing a vibration element according to one embodiment of the present specification. Fig. 30 is a cross-sectional view taken along line J-J' shown in Fig. 29. Fig. 31 is a perspective view showing the piezoelectric vibration part shown in Fig. 30. Figs. 29 to 31 are drawings showing other embodiments of the vibration element shown in one or more of Figs. 1 to 19.

[0294] 29 to 31, the vibration element 11 according to one embodiment of the present specification may be expressed as a flexible vibration structure, a flexible vibrator, a flexible vibration generating element, a flexible vibration generator, a flexible sound generator, a flexible sound element, a flexible sound generating element, a flexible sound generator, a flexible actuator, a flexible speaker, a flexible piezoelectric speaker, a film actuator, a film-type piezoelectric composite actuator, a film speaker, a film-type piezoelectric speaker, or a film-type piezoelectric composite speaker, and the embodiments of the present specification are not limited thereto.

[0295] The vibration element 11 according to an embodiment of the present specification can include a vibration generating section having a piezoelectric vibration section 11a, a first electrode section 11b, and a second electrode section 11c.

[0296] The piezoelectric vibrating unit 11a may include a piezoelectric material (or electroactive material) that exhibits the piezoelectric effect. For example, a piezoelectric material may have the characteristic that, when pressure or torsion is applied to a crystal structure by an external force, a potential difference is generated by dielectric polarization due to a change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field due to an inversely applied voltage. For example, the piezoelectric vibrating unit 11a may be expressed by other terms such as a piezoelectric layer, piezoelectric layer, piezoelectric material layer, electroactive layer, vibrating unit, piezoelectric material unit, electroactive unit, piezoelectric structure, piezoelectric composite layer, piezoelectric composite, or piezoelectric ceramic composite, and examples of the present specification are not limited to these. The piezoelectric vibrating unit 11a may be made of a transparent, translucent, or opaque piezoelectric material, and may be transparent, translucent, or opaque.

[0297] The piezoelectric vibrating portion 11a according to the embodiments of the present specification may include a plurality of first portions 11a1 and a plurality of second portions 11a2. For example, the plurality of first portions 11a1 and the plurality of second portions 11a2 may be alternately arranged along a first direction (X) (or a second direction (Y)). For example, the first direction (X) may be the horizontal direction of the piezoelectric vibrating portion 11a, and the second direction (Y) may be the vertical direction of the piezoelectric vibrating portion 11a that intersects with the first direction (X), but is not limited thereto. For example, the first direction (X) may be the vertical direction of the piezoelectric vibrating portion 11a, and the second direction (Y) may be the horizontal direction of the piezoelectric vibrating portion 11a.

[0298] Each of the first portions 11a1 may be made of an inorganic material, which may include a piezoelectric material having a piezoelectric effect, a composite piezoelectric material, or an electroactive material.

[0299] Each of the first portions 511a1 may be made of a ceramic material capable of achieving relatively high vibration, or may be made of a piezoelectric ceramic having a perovskite crystal structure. The perovskite crystal structure may have piezoelectric and inverse piezoelectric effects and may be a plate-like structure with orientation. The perovskite crystal structure may be expressed by the chemical formula ABO3, where the A site is composed of a divalent metal element and the B site is composed of a tetravalent metal element. In one example of the present specification, in the chemical formula ABO3, the A site and the B site may be cations, and O may be an anion. For example, each of the first portions 11a1 may include at least one of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, although examples of the present specification are not limited thereto.

[0300] According to an embodiment of the present specification, the piezoelectric vibrating unit 11a or the first portion 11a1 may include, but is not limited to, a PZT (lead zirconate titanate)-based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate)-based material containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb). Alternatively, the piezoelectric vibrating unit 11a or the first portion 11a1 may include at least one of CaTiO3, BaTiO3, and SrTiO3, which do not contain lead (Pb).

[0301] According to an embodiment of the present specification, each of the plurality of first portions 11a1 may be disposed between the plurality of second portions 11a2 and may have a first width (W1) parallel to the first direction (X) (or the second direction (Y)) and a length parallel to the second direction (Y) (or the first direction (X)). Each of the plurality of second portions 11a2 may have a second width (W2) parallel to the first direction (X) (or the second direction (Y)) and a length parallel to the second direction (Y) (or the first direction (X)). The first width (W1) may be the same as or different from the second width (W2). For example, the first width (W1) may be greater than the second width (W2). For example, the first portion 11a1 and the second portion 11a2 may have a line shape or a stripe shape having the same or different sizes. Therefore, the piezoelectric vibration unit 11a has a 2-2 composite structure with piezoelectric characteristics of the 2-2 vibration mode, and thus can have a resonance frequency of 20 kHz or less, although the embodiments of this specification are not limited thereto. For example, the resonance frequency of the piezoelectric vibration unit 11a can be changed depending on at least one of the shape, length, and thickness.

[0302] In the piezoelectric vibration unit 11a, the plurality of first portions 11a1 and the plurality of second portions 11a2 may be arranged (or arrayed) next to each other on the same plane (or the same layer). Each of the plurality of second portions 11a2 may be connected or bonded to an adjacent first portion 511a1 by being configured to fill the gap between two adjacent first portions 11a1. This allows the piezoelectric vibration unit 11a to be expanded to a desired size or length by side-coupling (or coupling) the first portion 511a1 and the second portion 511a2.

[0303] In the piezoelectric vibrating part 11a, the width (W2) of each of the plurality of second portions 11a2 may gradually decrease from the middle part of the piezoelectric vibrating part 11a or the vibrating element 11 toward both edge parts (or both tips).

[0304] According to one embodiment of the present specification, the second portion 11a2 having the largest width (W2) among the plurality of second portions 11a2 may be located in a portion where the greatest stress is concentrated when the piezoelectric vibrating portion 11a or the vibrating element 11 vibrates in the vertical direction (Z) (or thickness direction). The second portion 11a2 having the smallest width (W2) among the plurality of second portions 11a2 may be located in a portion where the least stress is generated when the piezoelectric vibrating portion 11a or the vibrating element 11 vibrates in the vertical direction (Z). For example, the second portion 11a2 having the largest width (W2) among the plurality of second portions 11a2 may be located in a central portion of the piezoelectric vibrating portion 11a, and the second portion 11a2 having the smallest width (W2) among the plurality of second portions 11a2 may be located at both edge portions of the piezoelectric vibrating portion 11a. As a result, when the piezoelectric vibrating part 11a or the vibrating element 11 vibrates in the vertical direction (Z), interference of sound waves generated at the part where the greatest stress is concentrated or overlap of resonance frequencies can be minimized, thereby improving the phenomenon of dipping of sound pressure generated in the low frequency range and improving the flatness of acoustic characteristics in the low frequency range. For example, the flatness of acoustic characteristics can be the magnitude of the deviation between the maximum sound pressure and the minimum sound pressure.

[0305] In the piezoelectric vibrating part 11a, each of the plurality of first portions 11a1 may have a different size (or width). For example, the size (or width) of each of the plurality of first portions 11a1 may gradually decrease or increase from the middle portion of the piezoelectric vibrating part 11a or the vibrating element 11 toward both edge portions (or both ends) of the piezoelectric vibrating part 11a. As a result, the piezoelectric vibrating part 11a may have various natural vibration frequencies due to the vibration of each of the plurality of first portions 11a1 having different sizes, thereby improving the sound pressure characteristics of the acoustics and expanding the acoustic reproduction band.

[0306] Each of the plurality of second portions 11a2 may be disposed between the plurality of first portions 11a1. As a result, the piezoelectric vibrating unit 11a or the vibrating element 11 may have improved vibration characteristics and ensured piezoelectric characteristics and flexibility because the second portions 11a2 may increase vibration energy due to links within the unit lattice of the first portions 11a1. For example, the second portions 11a2 may be one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but the embodiments of the present specification are not limited thereto.

[0307] According to an embodiment of the present specification, each of the plurality of second portions 11a2 may be made of an organic material portion. For example, the organic material portion may be disposed between the inorganic material portions to absorb impacts applied to the inorganic material portion (or the first portion) and release stress concentrated in the inorganic material portion, thereby improving the durability of the piezoelectric vibrating portion 11a or the vibrating element 11 and providing flexibility to the piezoelectric vibrating portion 11a or the vibrating element 11.

[0308] According to an embodiment of the present specification, the second portion 11a2 may have a lower modulus (or Young's modulus) and viscoelasticity than the first portion 11a1, thereby improving the reliability of the first portion 11a1, which is vulnerable to impact due to the brittle characteristics of the first portion 11a1. For example, the second portion 11a2 may be made of a material having a loss factor of 0.01 to 1 and a modulus of 0.1 to 10 GPa (Giga Pascal).

[0309] The organic material portion of the second portion 11a2 may include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material that has flexibility compared to the inorganic material portion of the first portion 11a1. For example, the second portion 11a2 may be expressed as a flexible adhesive portion, an elastic portion, a bending portion, a damping portion, or a soft portion, but the embodiments of the present specification are not limited thereto.

[0310] The piezoelectric vibrating part 11a according to the embodiments of the present specification may have the shape of a single thin film by arranging (or connecting) a plurality of first portions 11a1 and second portions 11a2 on the same plane. For example, the piezoelectric vibrating part 11a may have a structure in which a plurality of first portions 11a1 are connected to one side. For example, the plurality of first portions 11a1 may have a structure in which the entire piezoelectric vibrating part 11a is connected to each other via the second portions 11a2. For example, the piezoelectric vibrating part 11a may vibrate in the vertical direction due to the first portions 11a1 having vibration characteristics, and may bend into a curved shape due to the second portions 11a2 having flexibility. Furthermore, in the piezoelectric vibrating part 11a according to the embodiments of the present specification, the sizes of the first portions 11a1 and the second portions 11a2 may be set according to the piezoelectric characteristics and flexibility required for the piezoelectric vibrating part 11a or the vibration element 11. As one embodiment of the present specification, in the case of piezoelectric vibrating part 11a that requires piezoelectric characteristics more than flexibility, first portion 11a1 may be configured to be larger than second portion 11a2. As another embodiment of the present specification, in the case of piezoelectric vibrating part 11a that requires flexibility more than piezoelectric characteristics, second portion 11a2 may be configured to be larger than first portion 11a1. Therefore, since the size of piezoelectric vibrating part 11a can be adjusted depending on the required characteristics, there is an advantage in that the design of piezoelectric vibrating part 11a is easy.

[0311] The first electrode portion 11b may be disposed on the first surface (or upper surface) of the piezoelectric vibrating portion 11a. The first electrode portion 11b may be commonly disposed on or coupled to the first surface of each of the plurality of first portions 11a1 and the first surface of each of the plurality of second portions 11a2, and may be electrically connected to the first surface of each of the plurality of first portions 11a1. For example, the first electrode portion 11b may have the shape of a single electrode (or one electrode) disposed over the entire first surface of the piezoelectric vibrating portion 11a. For example, the first electrode portion 11b may have substantially the same shape as the piezoelectric vibrating portion 11a, although the embodiments of the present specification are not limited thereto.

[0312] The first electrode unit 11b according to an embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiment of the present specification is not limited thereto. The opaque conductive material may include aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), magnesium (Mg), or the like, or may be an alloy thereof, but the embodiment of the present specification is not limited thereto.

[0313] The second electrode portion 11c may be disposed on a second surface (or rear surface) different from (or opposite to) the first surface of the piezoelectric vibrating portion 11a. The second electrode portion 11c may be commonly disposed on or coupled to the second surface of each of the first portions 11a1 and the second surface of each of the second portions 11a2, and may be electrically connected to the second surface of each of the first portions 11a1. For example, the second electrode portion 11c may have the shape of a single electrode (or one electrode) disposed over the entire second surface of the piezoelectric vibrating portion 11a. For example, the second electrode portion 11c may have the same shape as the piezoelectric vibrating portion 11a, although the embodiment of the present specification is not limited thereto. The second electrode portion 11c according to an embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode portion 11c may be made of the same material as the first electrode portion 11b, although the embodiment of the present specification is not limited thereto. In another embodiment of the present disclosure, the second electrode portion 11c may be made of a different material than the first electrode portion 11b.

[0314] The piezoelectric vibrating portion 11a may be polarized by a constant voltage applied to the first electrode portion 11b and the second electrode portion 11c in a constant temperature atmosphere or in a temperature atmosphere that changes from high temperature to room temperature, but the embodiments of the present specification are not limited thereto. For example, the piezoelectric vibrating portion 11a may vibrate by alternately repeating contraction and / or expansion due to the inverse piezoelectric effect caused by an acoustic signal (or voice signal or drive signal) externally applied to the first electrode portion 11b and the second electrode portion 11c. For example, the piezoelectric vibrating portion 11a may vibrate by vibrations in the vertical direction (or thickness direction) (d33) and the planar direction (d31) due to the acoustic signal applied to the first electrode portion 11b and the second electrode portion 11c. The piezoelectric vibrating portion 11a may increase the displacement of the vibrating member (or diaphragm, or vibrating object) by contracting and / or expanding in the planar direction, thereby further improving the vibration of the vibrating member.

[0315] The vibration element 11 according to an embodiment of the present specification may further include a first cover member 11d and a second cover member 11e.

[0316] The first cover member 11d can be disposed on a first surface of the vibration element 11. For example, the first cover member 11d can be configured to cover the first electrode portion 11b. Thus, the first cover member 11d can protect the first electrode portion 11b and / or the piezoelectric vibration portion 11a.

[0317] The second cover member 11e may be disposed on a second surface of the vibration element 11. For example, the second cover member 11e may be configured to cover the second electrode portion 11c. Thus, the second cover member 11e can protect the second electrode portion 11c and / or the piezoelectric vibration portion 11a.

[0318] In one embodiment of the present specification, the first cover member 11d and the second cover member 11e may each include one or more materials selected from the group consisting of plastic, fiber, and wood, but the present specification is not limited thereto. For example, the first cover member 11d and the second cover member 11e may each include the same or different materials. For example, the first cover member 11d and the second cover member 11e may each be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the present specification is not limited thereto.

[0319] The first cover member 11d according to an embodiment of the present specification may be connected or bonded to the first electrode portion 11b via a first adhesive layer 11f. For example, the first cover member 11d may be connected or bonded to the first electrode portion 11b by a film lamination process using the first adhesive layer 11f as an intermediary.

[0320] The second cover member 11e according to an embodiment of the present specification may be connected or bonded to the second electrode portion 11c via the second adhesive layer 11g. For example, the second cover member 11e may be connected or bonded to the second electrode portion 11c by a film lamination process using the second adhesive layer 11g as an intermediary.

[0321] The first adhesive layer 11f may be disposed between the first electrode portion 11b and the first cover member 11d. The second adhesive layer 11g may be disposed between the second electrode portion 11c and the second cover member 11e. For example, the first adhesive layer 11f and the second adhesive layer 11g may be configured between the first cover member 11d and the second cover member 11e so as to completely surround the piezoelectric vibration portion 11a, the first electrode portion 11b, and the second electrode portion 11c. For example, the piezoelectric vibration portion 11a, the first electrode portion 11b, and the second electrode portion 11c may be embedded or built-in between the first adhesive layer 11f and the second adhesive layer 11g.

[0322] Each of the first adhesive layer 11f and the second adhesive layer 11g according to the embodiments of the present specification may include an electrically insulating material that is compressible and resilient while having adhesive properties. For example, each of the first adhesive layer 11f and the second adhesive layer 11g may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, but the embodiments of the present specification are not limited thereto.

[0323] Either the first cover member 11d or the second cover member 11e can be attached or coupled to the vibrating member (or diaphragm, or vibrating object) via an adhesive member.

[0324] According to one embodiment of the present specification, either the first cover member 11d or the second cover member 11e may be attached or coupled to the vibrating member (or vibrating plate, or vibrating object) via an adhesive member 12, as described with reference to Figures 1 to 8, or may be attached or coupled to the vibrating plate via an adhesive member 12, as described with reference to Figures 9 to 19.

[0325] The vibrating element 11 according to an embodiment of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad part 516.

[0326] The first power supply line (PL1) may be disposed between the first electrode portion 11b and the first cover member 11d and electrically connected to the first electrode portion 11b. For example, the first power supply line (PL1) may be disposed on the first cover member 11d. The first power supply line (PL1) may extend long along the second direction (Y) and be electrically connected to a central portion of the first electrode portion 11b. In one embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode portion 11b via an anisotropic conductive film. In another embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode portion 11b via a conductive material (or particles) contained in the first adhesive layer 11f.

[0327] The second power supply line (PL2) may be disposed between the second electrode portion 11c and the second cover member 11e and electrically connected to the second electrode portion 11c. For example, the second power supply line (PL2) may be disposed on the second cover member 11e. The second power supply line (PL2) may extend long along the second direction (Y) and be electrically connected to a central portion of the second electrode portion 11c. In one embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode portion 11c via an anisotropic conductive film. In another embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode portion 11c via a conductive material (or particles) contained in the second adhesive layer 11g. For example, the second power supply line (PL2) may not overlap with the first power supply line (PL1). When the second power supply line (PL2) is arranged so as not to overlap with the first power supply line (PL1), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) can be prevented.

[0328] The pad portion 11p may be configured to be connected to the first power supply line (PL1) and the second power supply line (PL2). The pad portion 11p may be configured on an edge portion of one side of either the first cover member 11d or the second cover member 11e so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2).

[0329] The pad part 11p according to one embodiment of the present specification may include a first pad electrode electrically connected to one end of the first power supply line (PL1) and a second pad electrode electrically connected to one end of the second power supply line (PL2).

[0330] The first pad electrode may be disposed on an edge portion on one side of either the first cover member 11d or the second cover member 11e and may be connected to one end of the first power supply line (PL1). For example, the first pad electrode may pass through either the first cover member 11d or the second cover member 11e and be electrically connected to one end of the first power supply line (PL1).

[0331] The second pad electrode may be disposed alongside the first pad electrode and connected to one end of the second power supply line (PL2). For example, the second pad electrode may pass through either the first cover member 11d or the second cover member 11e and be electrically connected to one end of the second power supply line (PL2).

[0332] According to an embodiment of the present specification, each of the first power supply line (PL1), the second power supply line (PL2), and the pad portion 11p may be configured to be transparent, semi-transparent, or opaque.

[0333] The pad portion 11p according to an embodiment of the present disclosure may be electrically connected to a signal cable 30.

[0334] The signal cable 30 is electrically connected to the pad portion 11p arranged on the vibration element 11 and can supply a vibration drive signal (or an acoustic signal or a voice signal) provided from an audio processing circuit (or a vibration drive circuit) to the vibration element 11. The signal cable 30 according to an embodiment of the present specification may include a first terminal electrically connected to a first pad electrode of the pad portion 11p and a second terminal electrically connected to a second pad electrode of the pad portion 11p. For example, the signal cable 30 may be formed of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and the embodiments of the present specification are not limited thereto.

[0335] The acoustic processing circuit can generate AC vibration drive signals including a first vibration drive signal and a second vibration drive signal based on acoustic data supplied from an external acoustic data generating circuit. The first vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal, and the second vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal. For example, the first vibration drive signal can be supplied to the first electrode portion 11b via a first terminal of the signal cable 30, a first pad electrode of the pad portion 11p, and a first power supply line (PL1). The second vibration drive signal can be supplied to the second electrode portion 11c via a second terminal of the signal cable 30, a second pad electrode of the pad portion 11p, and a second power supply line (PL2).

[0336] According to one embodiment of the present disclosure, the signal cable 30 may be configured to be transparent, translucent, or opaque.

[0337] The vibration element 11 according to an embodiment of the present specification can be realized in a thin film shape by alternately connecting first portions 11a1 having piezoelectric properties and second portions 11a2 having flexibility. This allows the vibration element 11 to be bent into a shape corresponding to the shape of a vibration member or a vibration target. For example, when the vibration element 11 is connected or bonded to a vibration member having various curved surfaces via an adhesive member, the vibration element 11 can be bent into a curved shape along the curved surfaces of the vibration member. Even when bent into a curved shape, the vibration element 11 does not suffer from deterioration in reliability, such as damage or breakage. Furthermore, the vibration element 11 according to an embodiment of the present specification has a larger elastic modulus than the adhesive member, and can easily vibrate a vibration member having various curved surfaces. This can improve the reliability of sound reproduction and the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by the vibration of the vibration member.

[0338] 32A to 32D are perspective views showing piezoelectric vibrating parts according to other examples of the present specification, each showing a piezoelectric vibrating part according to another example.

[0339] Referring to Figure 32A, a piezoelectric vibration part 11a according to another embodiment of the present specification may include a plurality of first portions 11a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 11a2 arranged between the plurality of first portions 11a1.

[0340] The plurality of first portions 11a1 may be arranged to be spaced apart from one another along the first direction (X) and the second direction (Y). For example, the plurality of first portions 11a1 may have hexahedral shapes of the same size and be arranged in a lattice pattern. Each of the plurality of first portions 11a1 may be made of substantially the same piezoelectric material as the first portions 11a1 described with reference to Figures 29 to 31, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0341] The second portion 11a2 may be disposed between the plurality of first portions 11a1 along each of the first direction (X) and the second direction (Y). The second portion 11a2 may be connected to or bonded to the adjacent first portions 11a1 by filling the gap between two adjacent first portions 11a1 or by surrounding each of the plurality of first portions 11a1. According to one embodiment of the present specification, the width of the second portion 11a2 disposed between two adjacent first portions 11a1 along the first direction (X) may be the same as or different from the width of the first portions 11a1, and the width of the second portion 11a2 disposed between two adjacent first portions 11a1 along the second direction (Y) may be the same as or different from the width of the first portions 11a1. The second portion 11a2 may be made of substantially the same organic material as the second portion 11a2 described with reference to Figures 29 to 31, so the same reference numerals will be used to denote the second portion 11a2, and redundant description thereof will be omitted.

[0342] The piezoelectric vibrating unit 11a according to the other embodiments of this specification may have a resonant frequency of 30 MHz or less by including a 1-3 composite structure having piezoelectric characteristics of the 1-3 vibration mode, but the embodiments of this specification are not limited thereto. For example, the resonant frequency of the piezoelectric vibrating unit 11a may be changed depending on at least one of the shape, length, and thickness.

[0343] Referring to Figure 32B, a piezoelectric vibration part 11a according to another embodiment of the present specification may include a plurality of first portions 11a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 11a2 arranged between the plurality of first portions 11a1.

[0344] Each of the plurality of first portions 11a1 may have a circular planar structure. For example, each of the plurality of first portions 11a1 may have a disk shape, although the embodiments of the present specification are not limited thereto. For example, each of the plurality of first portions 11a1 may have a dot shape, including an oval shape, a polygonal shape, or a doughnut shape. Each of the plurality of first portions 11a1 may be made of substantially the same piezoelectric material as the first portion 11a1 described with reference to FIGS. 29 to 31, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0345] The second portion 11a2 may be disposed between the first portions 11a1 along each of the first direction (X) and the second direction (Y). The second portion 11a2 may be configured to surround each of the first portions 11a1, and thereby connected to or bonded to each side of the first portions 11a1. The first portions 11a1 and the second portions 11a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 11a2 may be made of substantially the same organic material as the second portion 11a2 described with reference to FIGS. 29 to 31, and therefore the same reference numerals will be used to denote the second portion 11a2, and redundant description thereof will be omitted.

[0346] Referring to Figure 32C, in a vibration element 11 according to another embodiment of the present specification, the piezoelectric vibration portion 11a may include a plurality of first portions 11a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 11a2 arranged between the plurality of first portions 11a1.

[0347] Each of the first portions 11a1 may have a triangular planar structure. For example, each of the first portions 11a1 may have a triangular plate shape. Each of the first portions 11a1 may be made of substantially the same piezoelectric material as the first portions 11a1 described with reference to Figures 29 to 31, and therefore the same reference numerals will be used to denote the first portions 11a1, and redundant description thereof will be omitted.

[0348] According to one embodiment of the present specification, four adjacent first portions 11a1 among the plurality of first portions 11a1 may be arranged adjacent to each other to form a square shape (or a regular square shape). Each vertex of the four adjacent first portions 11a1 forming the square shape may be arranged adjacent to the center (or the exact center) of the square shape.

[0349] The second portion 11a2 may be disposed between the first portions 11a1 along each of the first direction (X) and the second direction (Y). The second portion 11a2 may be configured to surround each of the first portions 11a1, and thereby connected to or bonded to each side of the first portions 11a1. The first portions 11a1 and the second portions 11a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 11a2 may be made of substantially the same organic material as the second portion 11a2 described with reference to FIGS. 29 to 31, and therefore the same reference numerals will be used to denote the second portion 11a2, and redundant description thereof will be omitted.

[0350] Referring to Figure 32D, in a vibration element 11 according to another embodiment of the present specification, the piezoelectric vibration portion 11a may include a plurality of first portions 11a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 11a2 arranged between the plurality of first portions 11a1.

[0351] Each of the first portions 11a1 may have a triangular planar structure. For example, each of the first portions 11a1 may have a triangular plate shape. Each of the first portions 11a1 may be made of substantially the same piezoelectric material as the first portions 11a1 described with reference to Figures 29 to 31, and therefore the same reference numerals will be used to denote the first portions 11a1, and redundant description thereof will be omitted.

[0352] According to one embodiment of the present specification, six adjacent first portions 11a1 among the plurality of first portions 11a1 may be arranged adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). Each vertex of the six adjacent first portions 11a1 forming the hexagonal shape may be arranged adjacent to the center (or the exact center) of the hexagonal shape.

[0353] The second portion 11a2 may be disposed between the first portions 11a1 along each of the first direction (X) and the second direction (Y). The second portion 11a2 may be configured to surround each of the first portions 11a1, and thereby connected to or bonded to each side of the first portions 11a1. The first portions 11a1 and the second portions 11a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 11a2 may be made of substantially the same organic material as the second portion 11a2 described with reference to FIGS. 29 to 31, and therefore the same reference numerals will be used to denote the second portion 11a2, and redundant description thereof will be omitted.

[0354] Fig. 33 is a diagram showing a vibration element according to another embodiment of the present specification. Fig. 34 is a cross-sectional view taken along line K-K' shown in Fig. 33. Figs. 33 and 34 are drawings showing another embodiment of the vibration element shown in one or more of Figs. 1 to 19.

[0355] 33 and 34, a vibration element 11 according to another embodiment of the present specification may include first and second vibration parts 511-1 and 511-2.

[0356] The first and second vibration generating units 11-1 and 11-2 may be electrically separated and spaced apart from each other along the first direction (X). Each of the first and second vibration generating units 11-1 and 11-2 may vibrate by alternately or repeatedly contracting and / or expanding due to the piezoelectric effect. For example, the first and second vibration generating units 11-1 and 11-2 may be arranged or tiled at a fixed interval (D1) along the first direction (X). Thus, the vibration element 11, in which the first and second vibration generating units 11-1 and 11-2 are tiled, may be a vibration array, a vibration array unit, a vibration module array unit, a vibration array structure, a tiling vibration array, a tiling vibration array module, or a tiling vibration film.

[0357] Each of the first and second vibration generating units 11-1 and 11-2 according to the embodiments of the present specification may have a rectangular shape. For example, each of the first and second vibration generating units 11-1 and 11-2 may have a rectangular shape with a width of 5 cm or more. For example, each of the first and second vibration generating units 11-1 and 11-2 may have a square shape with dimensions of 5 cm x 5 cm or more, but the embodiments of the present specification are not limited thereto.

[0358] The first and second vibration generating units 11-1, 11-2 are arranged on the same plane or tiled, so that the vibration element 11 can be made larger in area by tiling the first and second vibration generating units 11-1, 11-2, which have relatively small sizes.

[0359] The first and second vibration generating units 11-1 and 11-2 may be arranged at a fixed interval (D1) or tiled to form a single vibration device (or a single vibration device) that is not driven independently but driven as a complete single unit. According to one embodiment of the present specification, the first separation distance (or first interval or first distance) (D1) between the first and second vibration generating units 11-1 and 11-2 in the first direction (X) may be 0.1 mm or more and less than 3 cm, but the embodiment of the present specification is not limited thereto.

[0360] According to one embodiment of the present specification, the first and second vibration generating units 11-1 and 11-2 are arranged or tiled to have a separation distance (or gap) (D1) of 0.1 mm or more and less than 3 cm, so that they can be driven as a single vibration device, and the reproduction band and sound pressure characteristics of the sound generated in conjunction with the single-body vibration of the first and second vibration generating units 11-1 and 11-2 can be increased. For example, in order to increase the reproduction band of the sound generated in conjunction with the single-body vibration of the first and second vibration generating units 11-1 and 11-2 and to increase the sound pressure characteristics of low-frequency sound, for example, below 500 Hz, the first and second vibration generating units 11-1 and 11-2 can be arranged with a gap (D1) of 0.1 mm or more and less than 5 mm.

[0361] According to one embodiment of the present specification, when the first and second vibration generating units 11-1, 11-2 are arranged with a first separation distance (or gap) (D1) of less than 0.1 mm or no first separation distance (or gap) (D1), the reliability of the first and second vibration generating units 11-1, 11-2 or the vibration element 11 may be reduced due to cracks or damage caused by physical contact between each other when the first and second vibration generating units 11-1, 11-2 vibrate.

[0362] According to one embodiment of the present specification, when the first and second vibration generating units 11-1 and 11-2 are arranged at a first separation distance (or gap) (D1) of 3 cm or more, the first and second vibration generating units 11-1 and 11-2 may not be driven as a single vibration device due to their independent vibrations. This may result in a reduction in the reproduction band and sound pressure characteristics of the sound generated by the vibrations of the first and second vibration generating units 11-1 and 11-2. For example, when the first and second vibration generating units 11-1 and 11-2 are arranged at a first separation distance (or gap) (D1) of 3 cm or more, the acoustic characteristics and sound pressure characteristics in the low-frequency band, for example, below 500 Hz, may be reduced.

[0363] According to one embodiment of the present specification, when the first and second vibration generating units 11-1, 11-2 are arranged at a distance (D1) of 5 mm, the first and second vibration generating units 11-1, 11-2 are not driven as a single vibration device, and therefore the acoustic characteristics and sound pressure characteristics may be reduced in the low frequency range, for example, below 200 Hz.

[0364] According to another embodiment of the present specification, when the first and second vibration generating units 11-1 and 11-2 are arranged with a distance D1 of 1 mm between them, the first and second vibration generating units 11-1 and 11-2 vibrate as a single vibration device, thereby expanding the sound reproduction band and increasing the sound pressure characteristics in the low-frequency range, for example, at frequencies below 500 Hz. For example, when the first and second vibration generating units 11-1 and 11-2 are arranged with a distance D1 of 1 mm between them, the vibration element 11 can be realized as a large-area vibrating body by optimizing the separation distance between the first and second vibration generating units 11-1 and 11-2. As a result, the first and second vibration generating units 11-1 and 11-2 can be driven as a large-area vibrating body by single-body vibration, thereby increasing or improving the sound reproduction band and the acoustic characteristics and sound pressure characteristics in the low-frequency range generated in conjunction with the large-area vibration of the vibration element 11.

[0365] Therefore, in order to realize single-body vibration (or one vibration device) of the first and second vibration generating units 11-1 and 11-2, the first separation distance (D1) between the first and second vibration generating units 11-1 and 11-2 may be set to 0.1 mm or more and less than 3 cm. Also, in order to realize single-body vibration (or one vibration device) of the first and second vibration generating units 11-1 and 11-2 and increase the sound pressure characteristics of the bass band sound, the first separation distance (D1) between the first and second vibration generating units 11-1 and 11-2 may be set to 0.1 mm or more and less than 5 mm.

[0366] Each of the first and second vibration generating sections 11-1 and 11-2 according to an embodiment of the present specification can include a piezoelectric vibration section 11a, a first electrode section 11b, and a second electrode section 11c.

[0367] The piezoelectric vibrating portion 11a of each of the first and second vibration generating portions 11-1 and 11-2 may include a piezoelectric material (or an electroactive material) that exhibits a piezoelectric effect. For example, the piezoelectric vibrating portion 11a of each of the first and second vibration generating portions 11-1 and 11-2 may be configured substantially similarly to any of the piezoelectric vibrating portions 11a described with reference to Figures 31 and 32A to 32D, and therefore the same reference numerals will be used to denote the same portions, and redundant description thereof will be omitted.

[0368] According to one embodiment of the present specification, each of the first and second vibration generating units 11-1, 11-2 may include any of the piezoelectric vibration units 11a described with reference to Figures 31 and 32A to 32D, or may include piezoelectric vibration units 11a that are different from each other.

[0369] The first electrode portion 11b may be disposed on a first surface of the piezoelectric vibrating portion 11a and electrically connected to the first surface of the piezoelectric vibrating portion 11a. The first electrode portion 11b is substantially the same as the first electrode portion 11b described with reference to FIG. 30, and therefore the same reference numerals are used to denote the first electrode portion 11b, and redundant description thereof will be omitted.

[0370] The second electrode portion 11c may be disposed on a second surface of the piezoelectric vibrating portion 11a and electrically connected to the second surface of the piezoelectric vibrating portion 11a. The second electrode portion 11c is substantially the same as the second electrode portion 11c described with reference to Fig. 30, and therefore the same reference numerals are used to denote the second electrode portion 11c, and redundant description thereof will be omitted.

[0371] The vibration element 11 according to another embodiment of the present specification may further include a first cover member 11d and a second cover member 11e.

[0372] The first cover member 11d can be disposed on the first surface of the vibration element 11. For example, the first cover member 11d can be commonly connected to the first surfaces of the first and second vibration generating units 11-1 and 11-2 or commonly support the first surfaces of the first and second vibration generating units 11-1 and 11-2 by covering the first electrode units 11b disposed on the first surfaces of the first and second vibration generating units 11-1 and 11-2. This allows the first cover member 11d to protect the first surfaces or the first electrode units 11b of the first and second vibration generating units 11-1 and 11-2.

[0373] The second cover member 11e can be disposed on the second surface of the vibration element 11. For example, the second cover member 11e can be commonly connected to the second surfaces of the first and second vibration generating units 11-1 and 11-2 or commonly support the second surfaces of the first and second vibration generating units 11-1 and 11-2 by covering the second electrode units 11c disposed on the second surfaces of the first and second vibration generating units 11-1 and 11-2. This allows the second cover member 11e to protect the second surfaces or the second electrode units 11c of the first and second vibration generating units 11-1 and 11-2.

[0374] In one embodiment of the present specification, the first cover member 11d and the second cover member 11e may each include one or more of plastic, fiber, and wood, but the embodiment of the present specification is not limited thereto. For example, the first cover member 11d and the second cover member 11e may each include the same or different materials. For example, the first cover member 11d and the second cover member 11e may each be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0375] The first cover member 11d according to one embodiment of the present specification can be disposed on the first surfaces of the first and second vibration generating units 11-1 and 11-2 via the first adhesive layer 11f. For example, the first cover member 11d can be disposed directly on the first surfaces of the first and second vibration generating units 11-1 and 11-2 by a film lamination process using the first adhesive layer 11f as an intermediary. Therefore, the first and second vibration generating units 11-1 and 11-2 can be integrated with (or disposed on) or tiled to the first cover member 11d so as to have a constant first separation distance (or interval) (D1).

[0376] The second cover member 11e according to one embodiment of the present specification can be disposed on the second surfaces of the first and second vibration generating units 11-1 and 11-2 via the second adhesive layer 11g. For example, the second cover member 11e can be disposed directly on the second surfaces of the first and second vibration generating units 11-1 and 11-2 by a film lamination process using the second adhesive layer 11g as an intermediary. Therefore, the first and second vibration generating units 11-1 and 11-2 can be integrated with (or disposed on) or tiled to the second cover member 11e so as to have a constant interval (D1). For example, the vibration element 11 can be realized with a single film by using the first cover member 11d and the second cover member 11e.

[0377] The first adhesive layer 11f may be disposed between the first and second vibration generating units 11-1 and 11-2 and on the first surfaces of the first and second vibration generating units 11-1 and 11-2. For example, the first adhesive layer 11f may be formed on the back surface (or inner surface) of the first cover member 11d that faces the first surfaces of the first and second vibration generating units 11-1 and 11-2, filling the space between the first and second vibration generating units 11-1 and 11-2 and filling the space between the first cover member 11d and the first surfaces of the first and second vibration generating units 11-1 and 11-2.

[0378] The second adhesive layer 11g may be disposed between the first and second vibration generating units 11-1 and 11-2 and on the second surfaces of the first and second vibration generating units 11-1 and 11-2. For example, the second adhesive layer 11g may be formed on the front surface (or inner surface) of the second cover member 11e facing the second surfaces of the first and second vibration generating units 11-1 and 11-2, filling the space between the first and second vibration generating units 11-1 and 11-2, and filling the space between the second surfaces of the first and second vibration generating units 11-1 and 11-2 and the second cover member 11e.

[0379] The first and second adhesive layers 11f and 11g may be interconnected or bonded between the first and second vibration generating units 11-1 and 11-2. This allows the first and second vibration generating units 11-1 and 11-2 to be surrounded by the first and second adhesive layers 11f and 11g, respectively. For example, the first and second adhesive layers 11f and 11g may be formed between the first cover member 11d and the second cover member 11e so as to completely surround the first and second vibration generating units 11-1 and 11-2, respectively. For example, the first and second vibration generating units 11-1 and 11-2 may be embedded or built-in between the first adhesive layer 11f and the second adhesive layer 11g.

[0380] According to an embodiment of the present specification, each of the first and second adhesive layers 11f, 11g may include an electrically insulating material that is adhesive and capable of being compressed and restored. For example, each of the first and second adhesive layers 11f, 11g may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, although the embodiment of the present specification is not limited thereto. For example, each of the first and second adhesive layers 11f, 11g may be configured to be transparent, translucent, or opaque.

[0381] A vibrating element 11 according to another embodiment of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad portion 11p.

[0382] The first power supply line (PL1) may be arranged on the back surface of the first cover member 11d facing the first surfaces of the first and second vibration generating units 11-1 and 11-2. The first power supply line (PL1) may be electrically connected to the first electrode units 11b of the first and second vibration generating units 11-1 and 11-2. For example, the first power supply line (PL1) may be arranged directly with the first electrode units 11b of the first and second vibration generating units 11-1 and 11-2. In one embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode units 11b of the first and second vibration generating units 11-1 and 11-2 via an anisotropic conductive film. In another embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode portion 11b of each of the first and second vibration generating portions 11-1 and 11-2 via a conductive material (or particles) contained in the first adhesive layer 11f.

[0383] The first power supply line (PL1) according to an embodiment of the present specification may include first and second upper power lines (PL11, PL12) arranged along the second direction (Y). For example, the first upper power line (PL11) may be connected to or directly electrically connected to the first electrode unit 11b of the first vibration generating unit 11-1. The second upper power line (PL12) may be connected to or directly electrically connected to the first electrode unit 11b of the second vibration generating unit 11-2.

[0384] The second power supply line (PL2) may be arranged on the front surface of the second cover member 11e facing the second surfaces of the first and second vibration generating units 11-1 and 11-2. The second power supply line (PL2) may be electrically connected to the second electrode units 11c of the first and second vibration generating units 11-1 and 11-2. For example, the second power supply line (PL2) may be arranged directly with the second electrode units 11c of the first and second vibration generating units 11-1 and 11-2. In one embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode units 11c of the first and second vibration generating units 11-1 and 11-2 via an anisotropic conductive film. In another embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode portion 11c of each of the first and second vibration generating portions 11-1 and 11-2 via a conductive material (or particles) contained in the second adhesive layer 11g.

[0385] The second power supply line (PL2) according to an embodiment of the present specification may include first and second lower power lines (PL21, PL22) arranged along the second direction (Y). For example, the first lower power line (PL21) may be connected to or directly electrically connected to the second electrode unit 11c of the first vibration generating unit 11-1. For example, the first lower power line (PL21) may overlap the first upper power line (PL11). For example, the first lower power supply line (PL21) may not overlap the first upper power supply line (PL11). If the first lower power supply line (PL21) is arranged so as not to overlap the first upper power supply line (PL11), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) may be prevented. The second lower power line (PL22) may be connected to or directly electrically connected to the second electrode unit 11c of the second vibration generating unit 11-2. For example, the second lower power supply line (PL22) may overlap with the second upper power supply line (PL12). For example, the second lower power supply line (PL22) may not overlap with the second upper power supply line (PL12). If the second lower power supply line (PL22) is arranged so as not to overlap with the second upper power supply line (PL12), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) may be prevented.

[0386] The pad portion 11p may be configured on the edge portion of one side of either the first cover member 11d or the second cover member 11e so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2).

[0387] The pad part 11p according to one embodiment of the present specification may include a first pad electrode electrically connected to one end of the first power supply line (PL1) and a second pad electrode electrically connected to one end of the second power supply line (PL2).

[0388] The first pad electrode may be commonly connected to one end of each of the first and second upper power lines (PL11, PL12) of the first power supply line (PL1). For example, one end of each of the first and second upper power lines (PL11, PL12) may branch off from the first pad electrode. The second pad electrode may be commonly connected to one end of each of the first and second lower power lines (PL21, PL22) of the second power supply line (PL2). For example, one end of each of the first and second lower power lines (PL21, PL22) may branch off from the second pad electrode.

[0389] The vibration element 11 according to another embodiment of the present specification may further include a signal cable 30.

[0390] The signal cable 30 is electrically connected to the pad portion 11p arranged on the vibration element 11 and can supply a vibration drive signal (or an acoustic signal or a voice signal) provided from the sound processing circuit to the vibration element 11. The signal cable 30 according to an embodiment of the present specification may include a first terminal electrically connected to a first pad electrode of the pad portion 11p and a second terminal electrically connected to a second pad electrode of the pad portion 11p. For example, the signal cable 30 may be formed of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and the embodiments of the present specification are not limited thereto.

[0391] The acoustic processing circuit can generate AC vibration drive signals including a first vibration drive signal and a second vibration drive signal based on the acoustic data. The first vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal, and the second vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal. For example, the first vibration drive signal can be supplied to the first electrode portion 11b of each of the first and second vibration generating units 11-1 and 11-2 via a first terminal of the signal cable 30, a first pad electrode of the pad portion 11p, and a first power supply line (PL1). The second vibration drive signal can be supplied to the second electrode portion 11c of each of the first and second vibration generating units 11-1 and 11-2 via a second terminal of the signal cable 30, a second pad electrode of the pad portion 11p, and a second power supply line (PL2).

[0392] 29 to 31, the vibration element 11 according to other embodiments of the present specification can be realized in a thin film shape, which allows it to be bent into a shape corresponding to the shape of the vibration member or the vibration target, making it possible to easily vibrate a vibration member including various curved surfaces, and improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by the vibration of the vibration member. Furthermore, the vibration element 11 according to other embodiments of the present specification includes first and second vibration generating units 11-1 and 11-2 arranged (or tiled) at a constant first separation distance (or interval) (D1) so as to be realized as one single vibrating body without being driven independently, and can be driven as a large-area vibrating body by the single-body vibration of the first and second vibration generating units 11-1 and 11-2.

[0393] FIG. 35 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 35 shows the vibration element shown in FIGS. 33 and 34 configured with four vibration generating units. Therefore, hereinafter, except for the four vibration generating units and the related configuration, the remaining same components are given the same reference numerals, and redundant explanations thereof may be omitted or simplified. The cross section of line K-K' shown in FIG. 35 is shown in FIG. 34.

[0394] Combining FIG. 35 with FIG. 34, the vibration element 11 according to another embodiment of this specification can include a plurality of vibration generating units 11-1, 11-2, 11-3, and 11-4.

[0395] The vibration generating units 11-1, 11-2, 11-3, and 11-4 may be arranged electrically separated from one another along the first direction (X) and the second direction (Y). For example, the vibration generating units 11-1, 11-2, 11-3, and 11-4 may be arranged or tiled in an i×j pattern on the same plane, so that the vibration element 11 can have a large area by tiling the vibration generating units 11-1, 11-2, 11-3, and 11-4, which are relatively small in size. For example, i is the number of vibration generating units arranged along the first direction (X) and may be a natural number of 2 or greater, and j is the number of vibration generating units arranged along the second direction (Y) and may be the same as or different from i. For example, each of the vibration generating units 11-1, 11-2, 11-3, and 11-4 may be arranged or tiled in a 2×2 pattern, but the embodiments of this specification are not limited to this. In the following description, it is assumed that the vibration element 11 includes first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4.

[0396] According to one embodiment of the present specification, the first and second vibration generating units 11-1 and 11-2 may be spaced apart from each other along the first direction (X). The third and fourth vibration generating units 11-3 and 11-4 may be spaced apart from each other along the first direction (X) and from the first and second vibration generating units 11-1 and 11-2 along the second direction (Y). The first and third vibration generating units 11-1 and 11-3 may face each other and be spaced apart from each other along the second direction (Y). The second and fourth vibration generating units 11-2 and 11-4 may face each other and be spaced apart from each other along the second direction (Y).

[0397] The first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 can be disposed between the first cover member 11d and the second cover member 11e. For example, the first cover member 11d and the second cover member 11e can connect the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 or support them together, thereby driving the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 as a single vibration device (or a single vibration device). For example, the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 can be driven as a single vibration device (or a single vibration device) by tiling them at regular intervals on the cover members 11d and 11e.

[0398] According to one embodiment of the present specification, as described with reference to Figures 33 and 34, the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 may be arranged (or tiled) at intervals of 0.1 mm or more and less than 3 cm along each of the first direction (X) and the second direction (Y) for complete single-body vibration or large-area vibration, and more preferably at intervals of 0.1 mm or more and less than 5 mm.

[0399] Each of the first to fourth vibration generating sections 11-1, 11-2, 11-3, and 11-4 can include a piezoelectric vibration section 11a, a first electrode section 11b, and a second electrode section 11c.

[0400] The piezoelectric vibrating portion 11a of each of the first to fourth vibration generating portions 11-1, 11-2, 11-3, and 11-4 may include a piezoelectric material (or an electroactive material) that exhibits a piezoelectric effect. The piezoelectric vibrating portion 11a of each of the first to fourth vibration generating portions 11-1, 11-2, 11-3, and 11-4 is configured substantially the same as any of the piezoelectric vibrating portions 11a described with reference to Figure 31 and Figures 32A to 32D, so the same reference numerals will be used to denote them, and redundant description thereof will be omitted.

[0401] According to one embodiment of the present specification, each of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 may include any of the piezoelectric vibration units 11a described with reference to Figure 31 and Figures 32A to 32D, or may include piezoelectric vibration units 11a that are different from each other.

[0402] According to other embodiments of the present specification, one or more of the first to fourth vibration generating units 11-1, 511-2, 511-3, and 511-4 may include a different piezoelectric vibration unit 11a from the piezoelectric vibration units 11a described with reference to Figure 31 and Figures 32A to 32D.

[0403] The first electrode portion 11b may be disposed on a first surface of the corresponding piezoelectric vibrating portion 11a and electrically connected to the first surface of the piezoelectric vibrating portion 11a. The first electrode portion 11b is substantially the same as the first electrode portion 11b described with reference to FIG. 30, and therefore the same reference numerals are used therefor, and redundant description will be omitted.

[0404] The second electrode portion 11c may be disposed on a second surface of the corresponding piezoelectric vibrating portion 11a and electrically connected to the second surface of the piezoelectric vibrating portion 11a. The first electrode portion 11b is substantially the same as the second electrode portion 11c described with reference to Fig. 30, and therefore the same reference numerals are used therefor, and redundant description will be omitted.

[0405] According to one embodiment of the present specification, the first and second adhesive layers 11f and 11g may be connected or bonded to each other between the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4. As a result, each of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 may be surrounded by the first and second adhesive layers 11f and 11g. For example, the first and second adhesive layers 11f and 11g may be formed between the first cover member 11d and the second cover member 11e so as to completely surround each of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4. For example, each of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 may be embedded or built-in between the first adhesive layer 11f and the second adhesive layer 11g.

[0406] A vibrating element 11 according to another embodiment of the present specification may further include a first power supply line PL1, a second power supply line PL2, and a pad portion 11p.

[0407] The first power supply line PL1 and the second power supply line PL2 are substantially the same as the first power supply line PL1 and the second power supply line PL2 described with reference to Figures 33 and 34, except for the electrical connection structure between the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4.Therefore, in the following explanation, only the electrical connection structure between the first power supply line PL1 and the second power supply line PL2 and the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 will be briefly described.

[0408] The first power supply line PL1 according to one embodiment of the present specification may include first and second upper power supply lines PL11 and PL12 arranged along the second direction (Y). For example, the first upper power supply line PL11 may be electrically connected to the first electrode units 11b of the first and third vibration generators 11-1 and 11-3 (or first group or first vibration generating group) among the first to fourth vibration generators 11-1, 11-2, 11-3, and 11-4, which are arranged in a first row parallel to the second direction (Y). The second upper power supply line PL12 may be electrically connected to the first electrode units 11b of the second and fourth vibration generators 11-2 and 11-4 (or second group or second vibration generating group) among the first to fourth vibration generators 11-1, 11-2, 11-3, and 11-4, which are arranged in a second row parallel to the second direction (Y).

[0409] The second power supply line PL2 according to an embodiment of the present specification may include first and second lower power supply lines PL21 and PL22 arranged along the second direction (Y). For example, the first lower power supply line PL21 may be electrically connected to the second electrode units 11c of the first and third vibration generators 11-1 and 11-3 (or first group or first vibration generating group) among the first to fourth vibration generators 11-1, 11-2, 11-3, and 11-4, which are arranged in a first row parallel to the second direction (Y). The second lower power supply line PL22 may be electrically connected to the second electrode units 11c of the second and fourth vibration generators 11-2 and 11-4 (or second group or second vibration generating group) among the first to fourth vibration generators 11-1, 11-2, 11-3, and 11-4, which are arranged in a second row parallel to the second direction (Y).

[0410] The pad portion 11p may be formed on an edge portion of one side of either the first cover member 11d or the second cover member 11e so as to be electrically connected to one side (or one end) of the first power supply line PL1 and the second power supply line PL2, respectively. The pad portion 11p is substantially the same as the pad portion 11p described with reference to Figures 33 and 34, and therefore the same reference numerals will be used therefor, and redundant description will be omitted.

[0411] Such a vibration element 11 according to another example of the present specification has the same effects as the vibration element 11 described with reference to FIGS. 29 to 34, and therefore a duplicated description thereof will be omitted.

[0412] FIG. 36 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 36 shows a vibration element in which the signal cable of the vibration element shown in FIGS. 29 to 35 has been changed. Therefore, hereinafter, except for the signal cable and its related components, the same reference numerals will be used for the remaining same components, and redundant explanations thereof may be omitted or simplified. The cross section of line J-J' shown in FIG. 36 is shown in FIG. 30.

[0413] Combining FIG. 36 with FIG. 30, in the vibration element 11 according to another embodiment of the present specification, the signal cable 30 can include an acoustic processing circuit 40.

[0414] The acoustic processing circuit 40 may be mounted on the signal cable 30. For example, the acoustic processing circuit 40 may be mounted on an edge portion of the signal cable 30 adjacent to the pad portion 11p of the vibration element 11. By integrating (or mounting) the acoustic processing circuit 40 with (or on) the signal cable 30, the acoustic processing circuit 40 and the signal cable 30 may be realized as a single component.

[0415] The signal cable 30 may be made of a double-sided flexible printed circuit, including, but not limited to, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board.

[0416] A signal cable 30 according to one embodiment of the present specification may include a wiring layer on a base film, a lower film bonded to a first surface of the wiring layer via an adhesive, an upper film bonded to a second surface of the wiring layer via an adhesive, and a plurality of contact pads and first and second terminals disposed on the upper film and connected to the wiring layer.

[0417] The wiring layer may include a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc., formed on one or more of the front surface and the bottom surface of the base film. For example, the plurality of signal lines, the first driving signal supply line, the second driving signal supply line, etc. may be made of a conductive material including copper (Cu), aluminum (Al), silver (Ag), or an alloy material of copper (Cu) and silver (Ag), but the embodiments of the present specification are not necessarily limited thereto.

[0418] Each of the plurality of contact pads is disposed on one of the lower film and the upper film, and can be selectively connected to a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc. through via holes.

[0419] The first and second terminals can be electrically coupled to first and second pad electrodes of the pad portion 11p formed on the vibration element 11, respectively.

[0420] The acoustic processing circuit 40 may be mounted on the signal cable 30 and electrically connected to a plurality of contact pads. The acoustic processing circuit 40 may receive acoustic data (or digital acoustic data), a clock, an enable signal, various drive voltages, and the like, supplied from an external acoustic data generating circuit via some of the contact pads. The acoustic processing circuit 40 may generate first and second vibration drive signals based on the acoustic data and output the generated first and second vibration drive signals to the first and second terminals via the corresponding contact pads and corresponding drive signal supply lines. Therefore, the vibration element 11 may vibrate in response to the first and second vibration drive signals supplied from the acoustic processing circuit 40 mounted on the signal cable 30 via the signal line, first and second terminals, pad portion 11p, and first and second power supply lines PL1 and PL2 of the signal cable 30.

[0421] The acoustic processing circuit 40 according to one embodiment of the present specification may include a decoder that receives acoustic data supplied from an external acoustic data generating circuit, an audio amplifier circuit that generates and outputs first and second vibration drive signals based on the acoustic data supplied from the decoder, a memory circuit that stores setting values ​​for the audio amplifier circuit, a control circuit that controls the operations of the decoder, the audio amplifier circuit, and the memory circuit, and passive elements such as resistors.

[0422] The audio amplifier circuit may include a preamplifier circuit that generates first and second vibration drive signals based on acoustic data, and a power amplifier circuit that converts the voltage and / or current of each of the first and second vibration drive signals supplied from the preamplifier circuit to a level suitable for driving the vibration element 11, but the examples of this specification are not limited thereto.

[0423] The decoding unit, the audio amplifier circuit, the memory circuit, and the control circuit may each be realized in the form of an integrated circuit (IC) and mounted on the signal cable 30. For example, the decoding unit, the audio amplifier circuit, the memory circuit, and the control circuit may be realized in one integrated circuit (IC) or one semiconductor chip.

[0424] Such a vibration element 11 according to another embodiment of the present specification may include an acoustic processing circuit 40 mounted on the signal cable 30, thereby simplifying or simplifying the connection structure between the vibration element 11, the acoustic processing circuit 40, the signal cable 30 and the acoustic data generating circuit unit, and since the acoustic processing circuit 40 is positioned adjacent to the vibration element 11, a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI), etc., generated by the length of the signal cable 30 due to the distance between the acoustic processing circuit 40 and the vibration element 11 may be omitted, but the embodiments of the present specification are not limited to this.

[0425] Additionally, in the vibration element 11 according to other embodiments of the present specification, the signal cable 30 on which the acoustic processing circuit 40 is implemented or integrated may also be applied to the vibration element 11 described in one or more of Figures 29, 33, and 35. For example, the signal cable 30 of the vibration element 11 described in one or more of Figures 29, 33, and 35 may be configured to include the acoustic processing circuit 40, and a duplicated description thereof will be omitted.

[0426] Fig. 37 is a diagram showing a vibration element according to another embodiment of the present specification. Fig. 38 is a cross-sectional view taken along line L-L' shown in Fig. 37. Fig. 39 is a cross-sectional view taken along line M-M' shown in Fig. 37. Figs. 37 to 39 are diagrams showing other embodiments of the vibration element shown in one or more of Figs. 1 to 19. Figs. 37 to 39 show modifications of the connection structure between the electrode section and the signal cable shown in Fig. 36.

[0427] 37 to 39, a vibration element 11 (or a diaphragm) according to another embodiment of the present specification can include a vibration generating section and a signal cable 30.

[0428] The vibration generating unit may include a piezoelectric vibration unit 11a, a first electrode unit 11b, and a second electrode unit 11c. Since such a vibration generating unit is substantially the same as the vibration generating unit of the vibration element 11 described with reference to Figures 29 to 32D, the same drawing symbols are used therefor, and redundant descriptions thereof may be omitted.

[0429] The signal cable 30 may be integrated into the vibration generating unit by being electrically connected to the first and second electrode portions 11b, 11c on one side of the vibration element 11. For example, the signal cable 30 may be electrically connected directly to the first and second electrode portions 11b, 11c. For example, the signal cable 30 may be connected to the first and second electrode portions 11b, 11c or electrically connected directly to them without passing through the power supply line and pad portions described with reference to FIGS. 29 to 32D.

[0430] A signal cable 30 according to an embodiment of the present disclosure may include first and second protruding lines 31a and 31b. For example, the first protruding line 31a may overlap at least a portion of the first electrode portion 11b and be electrically or directly connected to the first electrode portion 11b. The second protruding line 31b may overlap at least a portion of the second electrode portion 11c and be electrically or directly connected to the second electrode portion 11c. For example, each of the first and second protruding lines 31a and 31b may be bent toward the corresponding electrode portion 11b and 11c, but the present disclosure is not limited thereto. For example, each of the first and second protruding lines 31a and 31b may be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, but the present disclosure is not limited thereto.

[0431] The signal cable 30 according to one embodiment of the present disclosure may include a body portion, first and second protruding lines 31 a and 31 b, and an audio processing circuit 40 .

[0432] The body may be made of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and examples of the present specification are not limited to these.

[0433] The body portion according to one embodiment of the present specification may include a wiring layer 31 on a base film, a lower film 32 bonded to a first surface of the wiring layer 31 via a first adhesive 33, an upper film 34 bonded to a second surface of the wiring layer 31 via a second adhesive 35, and a plurality of contact pads disposed on the upper film 34 and connected to the wiring layer 31.

[0434] The wiring layer 31 may include a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc., formed on one or more of the front surface and the bottom surface of the base film. For example, the plurality of signal lines, the first driving signal supply line, the second driving signal supply line, etc. may be made of a conductive material including copper (Cu), aluminum (Al), silver (Ag), or an alloy material of copper (Cu) and silver (Ag), but the embodiments of the present specification are not necessarily limited thereto.

[0435] Each of the plurality of contact pads is disposed on one of the lower film and the upper film, and can be selectively connected to a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc. through via holes.

[0436] The first and second protruding lines 31a and 31b may be electrically connected to the first and second drive signal supply lines, respectively, disposed on the wiring layer 31, or may extend or protrude from the first and second drive signal supply lines to the outside through the one side surface 30s of the body. Each of the first and second protruding lines 31a and 31b may protrude to a certain length from the one side surface 30s of the body. For example, each of the first and second protruding lines 31a and 31b may extend or protrude from the one side surface 30s of the body in the second direction (Y) to a length that overlaps with at least a portion of the first and second electrode portions 11b and 11c, respectively.

[0437] The first protruding line 31a may bend from one side surface 30s of the body (or one side of the vibration element 11) onto the first electrode portion 11b and be electrically connected to at least a portion of the first electrode portion 11b. For example, the first protruding line 31a may be electrically connected directly to or in electrical contact with at least a portion of the first electrode portion 11b. For example, the first protruding line 31a may be electrically connected to the first electrode portion 11b via a conductive member such as a conductive ball or conductive double-sided tape.

[0438] The second protruding line 31b may bend from one side surface 30s of the body portion (or one side of the vibration element 11) onto the second electrode portion 11c and be electrically connected to at least a portion of the second electrode portion 11c. For example, the second protruding line 31b may be electrically connected directly to or in electrical contact with at least a portion of the second electrode portion 11c. For example, the second protruding line 31b may be electrically connected to the second electrode portion 11c via a conductive member such as a conductive ball or conductive double-sided tape.

[0439] The acoustic processing circuit 40 may be mounted on the signal cable 30 and electrically connected to the contact pads. The acoustic processing circuit 40 may receive acoustic data (or digital acoustic data), a clock, an enable signal, various drive voltages, and the like, supplied from an external acoustic data generating circuit via some of the contact pads. The acoustic processing circuit 40 may generate first and second vibration drive signals based on the acoustic data and output the generated first and second vibration drive signals to the first and second protruding lines 31 a, 31 b, respectively, via the corresponding contact pads and corresponding drive signal supply lines. Therefore, the vibration element 11 may vibrate in response to the first and second vibration drive signals supplied from the acoustic processing circuit 40 mounted on the signal cable 30 via the signal line of the signal cable 30, the first and second drive signal supply lines, and the first and second protruding lines 31 a, 31 b, respectively.

[0440] The audio processing circuit 40 according to one embodiment of the present specification may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, and passive elements such as resistors, and since this is substantially the same as the audio processing circuit 40 described with reference to FIG. 36, the same reference numerals will be used therefor and redundant description thereof will be omitted.

[0441] The signal cable 30 according to one embodiment of the present specification can directly supply vibration drive signals to the first and second electrode portions 11b and 11c via the first and second protruding lines 31a and 31b, respectively, thereby reducing the voltage drop due to the surface resistance characteristics of the first and second electrode portions 11b and 11c, complementing the electrical characteristics of the first and second electrode portions 11b and 11c, and increasing the freedom of selection of conductive materials used for the first and second electrode portions 11b and 11c.

[0442] The vibration element 11 according to another embodiment of the present specification may further include a first cover member 11d and a second cover member 11e.

[0443] The first cover member 11d may be disposed on a first surface of the vibration element 11. For example, the first cover member 11d may be configured to cover the first electrode portion 11b and the first protruding line 31a of the signal cable 30. Therefore, the first cover member 11d can protect the first electrode portion 11b and the first protruding line 31a of the signal cable 30, electrically connect the first protruding line 31a of the signal cable 30 to the first electrode portion 11b, or maintain an electrical connection between the first protruding line 31a of the signal cable 30 and the first electrode portion 11b.

[0444] The second cover member 11e may be disposed on a second surface of the vibration element 11. For example, the second cover member 11e may be configured to cover the second electrode portion 11c and the second protruding line 31b of the signal cable 30. Therefore, the second cover member 11e can protect the second electrode portion 11c and the second protruding line 31b of the signal cable 30, electrically connect the second protruding line 31b of the signal cable 30 to the second electrode portion 11c, or maintain an electrical connection between the second protruding line 31b of the signal cable 30 and the second electrode portion 11c.

[0445] In one embodiment of the present specification, the first and second cover members 11d and 11e may each include one or more of plastic, fiber, and wood, but the embodiment of the present specification is not limited thereto. For example, the first and second cover members 11d and 11e may each include the same or different materials. For example, the first and second cover members 11d and 11e may each be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0446] The first cover member 11d according to an embodiment of the present specification may be connected or joined to the first electrode portion 11b and the first protruding line 31a of the signal cable 30 via the first adhesive layer 11f. For example, the first cover member 11d may be connected or joined to the first electrode portion 11b and the first protruding line 31a of the signal cable 30 by a film lamination process using the first adhesive layer 11f as an intermediary. Therefore, the first protruding line (or first finger line) 31a of the signal cable 30 may be disposed between the first electrode portion 11b and the first cover member 11d and integrated with the vibration element 11.

[0447] The second cover member 11e according to an embodiment of the present specification may be connected or joined to the second electrode portion 11c and the second protruding line 31b of the signal cable 30 via the second adhesive layer 11g. For example, the second cover member 11e may be connected or joined to the second electrode portion 11c and the second protruding line 31b of the signal cable 30 by a film lamination process using the second adhesive layer 11g as an intermediary. Therefore, the second protruding line (or second finger line) 31b of the signal cable 30 may be disposed between the second electrode portion 11c and the second cover member 11e and integrated with the vibration element 11.

[0448] Each of the first and second cover members 11d and 11e according to an embodiment of the present specification may be a protective film or an insulating film for protecting the piezoelectric vibration unit 11a and the electrode units 11b and 11c, etc., since they do not include or require a pad unit and a power supply line for receiving a vibration drive signal from the signal cable 30. For example, each of the first and second cover members 11d and 11e may be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0449] In other embodiments of the present specification, first and second cover members 11d and 11e are electrically insulated from electrode portions 11b and 11c by adhesive layers 11f and 11g, respectively, and therefore, at least one of first and second cover members 11d and 11e may include a metal film, metal layer, or metal plate made of a metal material. Each of first and second cover members 11d and 11e made of a metal material reinforces the mass of vibration element 11 or piezoelectric vibration portion 11a, thereby reducing the resonant frequency of vibration element 11 or piezoelectric vibration portion 11a due to the increased mass, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by vibration of vibration element 11 or piezoelectric vibration portion 11a. For example, the metal material included in either the first or second cover member 11d, 11e may be made of one or more of stainless steel, aluminum (Al), an aluminum alloy, magnesium (Mg), a magnesium alloy, and a magnesium-lithium (Mg-Li) alloy, and examples of the present specification are not limited to these.

[0450] According to one embodiment of the present specification, each of the first and second adhesive layers 11f and 11g may include an electrically insulating material that is adhesive and capable of being compressed and restored. For example, each of the first and second adhesive layers 11f and 11g may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, although the embodiment of the present specification is not limited thereto.

[0451] Optionally, at least a portion of the signal cable 30 may be disposed or inserted between the first cover member 11d and the second cover member 11e. For example, one side surface 30s of the body portion of the signal cable 30 (or one edge portion of the body portion) and each of the first and second protruding lines 31a, 31b may be disposed or inserted between the first cover member 11d and the second cover member 11e. For example, one side surface 30s of the body portion of the signal cable 30 and each of the first and second protruding lines 31a, 31b may be housed or inserted inside the vibration element 11. Therefore, at least a portion of the signal cable 30 and each of the first and second protruding lines 31a, 31b are not exposed to the outside of the first cover member 11d and the second cover member 11e, respectively, thereby preventing breakage of the first and second protruding lines 31a, 31b due to stress such as movement or bending of the signal cable 30.

[0452] Such a vibration element 11 according to another embodiment of the present specification can simplify the structure and manufacturing process because the integrated structure between the electrode portions 11b, 11c and the signal cable 30 eliminates the need for a patterning process for forming power supply lines and pad portions on the cover members 11d, 11e and a soldering process between the pad portions and the signal cable 30. Furthermore, in the vibration element 11 according to another embodiment of the present specification, a vibration drive signal is directly supplied to the electrode portions 11b, 11c via the protruding lines 31a, 31b protruding from the signal cable 30, thereby complementing the electrical characteristics of the first and second electrode portions 11b, 11c. Furthermore, the vibration element 11 in other embodiments of this specification includes an acoustic processing circuit 40 implemented in the signal cable 30, thereby simplifying or simplifying the connection structure between the vibration element 11, the acoustic processing circuit 40, the signal cable 30, and the acoustic data generation circuit unit, and by arranging the acoustic processing circuit 40 adjacent to the vibration element 11, a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI), etc., generated by the length of the signal cable 30 due to the distance between the acoustic processing circuit 40 and the vibration element 11 can be omitted.

[0453] FIG. 40 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 41 is a cross-sectional view taken along line N-N' in FIG. 40. The cross-section taken along line L-L' in FIG. 40 is shown in FIG. 38. FIGS. 40 and 41 are diagrams showing another embodiment of the vibration element shown in one or more of FIGS. 1 to 19. FIGS. 40 and 41 show a modified connection structure between the electrode unit and the signal cable shown in FIG. 35. Therefore, in the following description, the same reference numerals will be used for the remaining same components, except for the electrode unit, the signal cable, and the components related thereto, and redundant description thereof may be omitted or simplified.

[0454] Referring to Figures 40 and 41, a vibration element 11 (or diaphragm) according to another embodiment of this specification may include first and second vibration generating sections 11-1, 11-2, a first signal cable 30a, and a second signal cable 30b.

[0455] The first and second vibration generating units 11-1 and 11-2 may be electrically separated from each other along the first direction (X). Each of the first and second vibration generating units 11-1 and 11-2 may include a piezoelectric vibration unit 11a, a first electrode unit 11b, and a second electrode unit 11c. The first and second vibration generating units 11-1 and 11-2 are substantially the same as the first and second vibration generating units 11-1 and 11-2 of the vibration element 11 described with reference to FIGS. 33 and 34, and therefore will be denoted by the same reference numerals and redundant description thereof will be omitted.

[0456] The first signal cable 30a may be integrated with the first vibration generating unit 11-1 by being electrically connected to or directly connected to the first and second electrodes 11b, 11c of the first vibration generating unit 11-1 on one side of the vibration element 11. For example, the first signal cable 30a may be electrically connected to the first and second electrodes 11b, 11c of the first vibration generating unit 11-1 without passing through the power supply line and pads described with reference to FIGS.

[0457] The second signal cable 30b may be integrated with the second vibration generating unit 11-2 by being electrically connected to or directly connected to the first and second electrode units 11b, 11c of the second vibration generating unit 11-2 on one side of the vibration element 11. For example, the second signal cable 30b may be electrically connected to the first and second electrode units 11b, 11c of the second vibration generating unit 11-2 without passing through the power supply line and pad units described with reference to FIGS.

[0458] According to an embodiment of the present specification, the first and second signal cables 30a, 30b may each include a first and second protruding line 31a, 31b. For example, the first and second protruding lines 31a, 31b may each be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, and the embodiment of the present specification is not limited thereto.

[0459] The first protruding line 31a (or the first upper protruding line 31a1) of the first signal cable 30a overlaps with at least a portion of the first electrode 11b of the first vibration generating unit 11-1 and may be electrically connected to the first electrode 11b or may be electrically connected directly to the first electrode 11b. The second protruding line 31b (or the first lower protruding line 31b1) of the first signal cable 30a overlaps with at least a portion of the second electrode 11c of the first vibration generating unit 11-1 and may be electrically connected to the second electrode 11c or may be electrically connected directly to the second electrode 11c. For example, the first and second protruding lines 31a, 31b of the first signal cable 30a may be bent toward the corresponding electrode 11b, 11c of the first vibration generating unit 11-1, but the embodiments of the present specification are not limited thereto.

[0460] The first protruding line 31a (or the second upper protruding line 31a2) of the second signal cable 30b may overlap at least a portion of the first electrode 11b of the second vibration generating unit 11-2 and be electrically connected to the first electrode 11b or directly connected thereto. The second protruding line 31b (or the second lower protruding line 31b2) of the second signal cable 30b may overlap at least a portion of the second electrode 11c of the second vibration generating unit 11-2 and be electrically connected to the second electrode 11c or directly connected thereto. For example, the first and second protruding lines 31a, 31b of the second signal cable 30b may be bent toward the corresponding electrode 11b, 11c of the second vibration generating unit 11-2, but the embodiments of the present specification are not limited thereto.

[0461] Each of the first and second signal cables 30a, 30b according to an embodiment of the present specification may include a body portion, first and second protruding lines 31a, 31b, and sound processing circuits 40a, 40b. Each of the first and second signal cables 30a, 30b is substantially the same as the signal cable 30 described with reference to Figures 37 to 39, and therefore the same reference numerals are used, and redundant description thereof may be omitted or simplified.

[0462] The acoustic processing circuit (or first acoustic processing circuit) 40a mounted on or integrated with the first signal cable 30a generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and can supply the first and second vibration drive signals to the first and second electrode units 11b, 11c of the first vibration generating unit 11-1 via the first and second protruding lines 31a, 31b. The acoustic processing circuit 40a mounted on the first signal cable 30a can include a decoder, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 40 described with reference to Figure 36 or 38, the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0463] The acoustic processing circuit (or second acoustic processing circuit) 40b mounted on or integrated with the second signal cable 30b generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 11b, 11c of the second vibration generating unit 11-2 via the first and second protruding lines 31a, 31b. The acoustic processing circuit 40b mounted on the second signal cable 30b may include a decoder, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and is substantially the same as the acoustic processing circuit 40 described with reference to FIG. 36 or 38, so the same reference numerals will be used and redundant description thereof will be omitted.

[0464] A vibration element 11 according to another embodiment of the present specification may further include a first cover member 11d and a second cover member 11e. The first and second cover members 11d and 11e are substantially the same as the first and second cover members 11d and 11e described with reference to Figures 33 and 34 or 37 to 39, except that they are configured to cover the first and second vibration generating units 11-1 and 11-2, respectively, and the first and second protruding lines 31a and 31b of the first and second signal cables 30a and 30b, respectively. Therefore, the same reference numerals are used to denote them, and redundant description thereof will be omitted.

[0465] The first cover member 11d may be disposed on a first surface of the vibration element 11. For example, the first cover member 11d may be configured to cover the first electrode portions 11b of the first and second vibration generating portions 11-1 and 11-2 and the first protruding lines 31a of the first and second signal cables 30a and 30b.

[0466] The second cover member 11e may be disposed on a second surface of the vibration element 11. For example, the second cover member 11e may be configured to cover the second electrode portions 11c of the first and second vibration generating portions 11-1 and 11-2 and the second protruding lines 31b of the first and second signal cables 30a and 30b.

[0467] The first cover member 11d according to one embodiment of the present specification may be connected or bonded to the first electrode portions 11b of the first and second vibration generating units 11-1 and 11-2 and the first protruding lines 31a of the first and second signal cables 30a and 30b via the first adhesive layer 11f. Therefore, the first protruding lines (or first finger lines) 31a of the first and second signal cables 30a and 30b may be disposed between the first electrode portions 11b of the first and second vibration generating units 11-1 and 11-2 and the first cover member 11d, and integrated with the vibration element 11.

[0468] The second cover member 11e according to one embodiment of the present specification may be connected or bonded to the second electrode portions 11c of the first and second vibration generating units 11-1 and 11-2 and the second protruding lines 31b of the first and second signal cables 30a and 30b via the second adhesive layer 11g. Therefore, the second protruding lines (or second finger lines) 31b of the first and second signal cables 30a and 30b may be disposed between the second electrode portions 11c of the first and second vibration generating units 11-1 and 11-2 and the second cover member 11e, and integrated with the vibration element 11.

[0469] The first adhesive layer 11f may be disposed between the first and second vibration generating units 11-1 and 11-2 and on the first surfaces of the first and second vibration generating units 11-1 and 11-2. The second adhesive layer 11g may be disposed between the first and second vibration generating units 11-1 and 11-2 and on the second surfaces of the first and second vibration generating units 11-1 and 11-2. For example, the first and second adhesive layers 11f and 11g may be configured between the first cover member 11d and the second cover member 11e so as to completely surround the first and second vibration generating units 11-1 and 11-2. The first and second adhesive layers 11f and 11g may be connected or bonded to each other between the first and second vibration generating units 11-1 and 11-2.

[0470] Optionally, as described with reference to Figures 37 to 39, at least a portion of each of the first and second signal cables 30a, 30b may be positioned or inserted between the first cover member 11d and the second cover member 11e, thereby preventing breakage of the first and second protruding lines 31a, 31b due to stress such as movement or bending of the signal cable 30.

[0471] The vibration element 11 according to other embodiments of the present specification may be driven as a large-area vibrating body by single-body vibration of the first and second vibration generating units 11-1 and 11-2, similar to the vibration element 11 described with reference to FIGS. 33 and 34. The embodiments of the present specification are not limited thereto. For example, the first and second vibration generating units 11-1 and 11-2 may be independently driven by corresponding acoustic processing circuits. Furthermore, similar to the vibration element 11 described with reference to FIGS. 37 to 39, the vibration element 11 according to other embodiments of the present specification may have a simplified structure and manufacturing process, the electrical characteristics of the electrodes 11b and 11c may be enhanced, the connection structure between the vibration generating units 11-1 and 11-2, the acoustic processing circuits 40a and 40b, the signal cables 30a and 30b, and the acoustic data generating circuit may be simplified or simplified, and a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI) may be omitted.

[0472] Alternatively, in a vibration element 11 according to another embodiment of the present specification, the first and second signal cables 30a, 30b may be replaced or configured as a single signal cable 30, as shown by the dotted line in FIG. 40 . A single signal cable 30 according to an embodiment of the present specification may be configured by simply combining the first and second signal cables 30a, 30b without changing the structure, thereby having a width greater than the sum of the widths of the first and second signal cables 30a, 30b. A single signal cable 30 according to another embodiment of the present specification may be configured such that an edge portion on one side of the body, on which the first and second acoustic processing circuits 40a, 40b are mounted, has a relatively wide width, and the remaining portion, excluding the edge portion on one side of the body, has the same width as either one of the first and second signal cables 30a, 30b. The embodiments of the present specification are not limited thereto. For example, a single signal cable 30 may include only one acoustic processing circuit shared between the first and second vibration generating units 11-1, 11-2. In this case, one signal cable 30 may have a width that is the same as or similar to the width of each of the first and second signal cables 30a, 30b.

[0473] FIG. 42 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 42 shows the vibration element shown in FIGS. 40 and 41 configured with four vibration generating units. Therefore, hereinafter, except for the four vibration generating units and the related configuration, the remaining same components are given the same reference numerals, and redundant explanations thereof may be omitted or simplified. The cross section taken along line L-L' in FIG. 42 is shown in FIG. 38, and the cross section taken along line N-N' in FIG. 42 is shown in FIG. 41.

[0474] Combining Figure 42 with Figures 38 and 41, a vibration element 11 (or vibration plate) according to other embodiments of this specification can include multiple vibration generating units 11-1, 11-2, 11-3, 11-4, a first signal cable 30a, and a second signal cable 30b.

[0475] The vibration generators 11-1, 11-2, 11-3, and 11-4 may be electrically separated and spaced apart from one another along the first direction (X) and the second direction (Y). For example, the vibration generators 11-1, 11-2, 11-3, and 11-4 may be arranged or tiled in an i×j pattern on the same plane. Each of the vibration generators 11-1, 11-2, 11-3, and 11-4 may include a piezoelectric vibration unit 11a, a first electrode unit 11b, and a second electrode unit 11c. The vibration generators 11-1, 11-2, 11-3, and 11-4 are substantially the same as the vibration generators 11-1, 11-2, 11-3, and 11-4 of the vibration element 11 described with reference to FIG. 35, and therefore the same reference numerals are used and redundant description will be omitted. In the following description, it is assumed that the vibration element 11 includes first to fourth vibration generating sections 11-1, 11-2, 11-3, and 11-4.

[0476] The first signal cable 30a may be electrically connected to the first and second electrode units 11b and 11c of the first and third vibration generating units 11-1 and 11-3, respectively, on one side of the vibration element 11, or may be electrically connected directly to the first and second electrode units 11b and 11c of the first and third vibration generating units 11-1 and 11-3, thereby being integrated with the first and third vibration generating units 11-1 and 11-3. For example, the first signal cable 30a may be electrically connected to the first and second electrode units 11b and 11c of the first and third vibration generating units 11-1 and 11-3, respectively, without passing through the power supply line and pad units described with reference to FIG.

[0477] The second signal cable 30b may be integrated with the second and fourth vibration generating units 11-2 and 11-4 by being electrically connected to or directly connected to the first and second electrode units 11b and 11c of the second and fourth vibration generating units 11-2 and 11-4 on one side of the vibration element 11. For example, the second signal cable 30b may be electrically connected to the first and second electrode units 11b and 11c of the second and fourth vibration generating units 11-2 and 11-4 without passing through the power supply line and pad units described with reference to FIG.

[0478] According to an embodiment of the present specification, the first and second signal cables 30a, 30b may each include a first and second protruding line 31a, 31b. For example, the first and second protruding lines 31a, 31b may each be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, and the embodiment of the present specification is not limited thereto.

[0479] The first protruding line 31a (or the first upper protruding line 31a1) of the first signal cable 30a overlaps with at least a portion of the first electrode portion 11b of each of the first and third vibration generating units 11-1 and 11-3, and may be electrically connected to the first electrode portion 11b or may be electrically connected directly to the first electrode portion 11b. The second protruding line 31b (or the first lower protruding line 31b1) of the first signal cable 30a overlaps with at least a portion of the second electrode portion 11c of each of the first and third vibration generating units 11-1 and 11-3, and may be electrically connected to the second electrode portion 11c or may be electrically connected directly to the second electrode portion 11c. For example, the first and second protruding lines 31a and 31b of the first signal cable 30a may be bent toward the corresponding electrode portion 11b and 11c of each of the first and third vibration generating units 11-1 and 11-3, but the embodiments of the present specification are not limited thereto.

[0480] The first protruding line 31a (or the second upper protruding line 31a2) of the second signal cable 30b may overlap at least a portion of the first electrode portion 11b of each of the second and fourth vibration generating units 11-2 and 11-4, and may be electrically connected to the first electrode portion 11b or may be electrically connected directly to the first electrode portion 11b. The second protruding line 31b (or the second lower protruding line 31b2) of the second signal cable 30b may overlap at least a portion of the second electrode portion 11c of each of the second and fourth vibration generating units 11-2 and 11-4, and may be electrically connected to the second electrode portion 11c or may be electrically connected directly to the second electrode portion 11c. For example, the first and second protruding lines 31a and 31b of the second signal cable 30b may be bent toward the corresponding electrode portion 11b and 11c of each of the second and fourth vibration generating units 11-2 and 11-4, but the embodiments of the present specification are not limited thereto.

[0481] Each of the first and second signal cables 30a, 30b according to an embodiment of the present specification may include a body portion, first and second protruding lines 31a, 31b, and sound processing circuits 40a, 40b. Each of the first and second signal cables 30a, 30b is substantially the same as the signal cable 30 described with reference to Figures 37 to 39, and therefore the same reference numerals are used, and redundant description thereof may be omitted or simplified.

[0482] The acoustic processing circuit (or first acoustic processing circuit) 40a mounted on or integrated with the first signal cable 30a generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 11b and 11c of the first and third vibration generating units 11-1 and 11-3, respectively, via the first and second protruding lines 31a and 31b. The acoustic processing circuit 40a mounted on the first signal cable 30a may include a decoder, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 40 described with reference to FIG. 36 or 38, the same reference numerals will be used and redundant description thereof will be omitted.

[0483] The acoustic processing circuit (or second acoustic processing circuit) 40b mounted on or integrated with the second signal cable 30b generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 11b and 11c of the second and fourth vibration generating units 11-2 and 11-4, respectively, via the first and second protruding lines 31a and 31b. The acoustic processing circuit 40b mounted on the second signal cable 30b may include a decoder, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and is substantially the same as the acoustic processing circuit 40 described with reference to FIG. 36 or 38, so the same reference numerals will be used and redundant description thereof will be omitted.

[0484] A vibration element 11 according to another embodiment of the present specification may further include a first cover member 11d and a second cover member 11e. The first and second cover members 11d and 11e are substantially the same as the first and second cover members 11d and 11e described with reference to Fig. 35 or Figs. 37 to 39, except that they are configured to cover the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4, respectively, and the first and second protruding lines 31a and 31b of the first and second signal cables 30a and 30b, respectively. Therefore, the same reference numerals are used to denote them, and redundant description thereof will be omitted.

[0485] The first cover member 11d can be disposed on a first surface of the vibration element 11. For example, the first cover member 11d can be configured to cover the first electrode portions 11b of the first to fourth vibration generating portions 11-1, 11-2, 11-3, and 11-4 and the first protruding lines 31a of the first and second signal cables 30a and 30b.

[0486] The second cover member 11e may be disposed on the second surface of the vibration element 11. For example, the second cover member 11e may be configured to cover the second electrode portions 11c of the first to fourth vibration generating portions 11-1, 11-2, 11-3, and 11-4 and the second protruding lines 31b of the first and second signal cables 30a and 30b.

[0487] The first cover member 11d according to one embodiment of the present specification may be connected or coupled to the first electrode portions 11b of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and the first protruding lines 31a of the first and second signal cables 30a and 30b via the first adhesive layer 11f. Therefore, the first protruding lines (or first finger lines) 31a of the first and second signal cables 30a and 30b may be disposed between the first electrode portions 11b of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and the first cover member 11d, and may be integrated with the vibration element 11.

[0488] The second cover member 11e according to one embodiment of the present specification may be connected or coupled to the second electrode portions 11c of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and the second protruding lines 31b of the first and second signal cables 30a and 30b via the second adhesive layer 11g. Therefore, the second protruding lines (or second finger lines) 31b of the first and second signal cables 30a and 30b may be disposed between the second electrode portions 11c of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and the second cover member 11e, and may be integrated with the vibration element 11.

[0489] The first adhesive layer 11f may be disposed between the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and on the first surfaces of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4. The second adhesive layer 11g may be disposed between the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 and on the second surfaces of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4. For example, the first and second adhesive layers 11f and 11g may be formed between the first cover member 11d and the second cover member 11e so as to completely surround each of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4. The first and second adhesive layers 11f, 11g may be connected or bonded to each other between the first to fourth vibration generating sections 11-1, 11-2, 11-3, 11-4.

[0490] Optionally, as described with reference to Figures 37 to 39, at least a portion of each of the first and second signal cables 30a, 30b may be positioned or inserted between the first cover member 11d and the second cover member 11e, thereby preventing breakage of the first and second protruding lines 31a, 31b due to stress such as movement or bending of the signal cable 30.

[0491] Such a vibration element 11 according to another embodiment of the present specification can be driven as a large-area vibrating body by single-body vibration of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4, similar to the vibration element 11 described with reference to Fig. 35. Furthermore, similar to the vibration element 11 described with reference to Figs. 37 to 39, the vibration element 11 according to another embodiment of the present specification can have a simplified structure and manufacturing process, the electrical characteristics of each of the electrode units 11b and 11c can be complemented, the connection structure between the acoustic processing circuits 40a and 40b, the signal cables 30a and 30b, and the acoustic data generating circuit unit of the first to fourth vibration generating units 11-1, 11-2, 11-3, and 11-4 can be simplified or simplified, and a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI) can be omitted.

[0492] According to another embodiment of the present specification, in the vibration element 11 according to another embodiment of the present specification, the first and second signal cables 30a, 30b may be changed or configured into a single signal cable 30, as shown by the dotted line in FIG. 42. In one signal cable 30 according to one embodiment of the present specification, the first and second signal cables 30a, 30b may simply be configured into one without changing t...

Claims

1. A vibration element; an adhesive member on the back surface of the vibration element; a reinforcing member disposed between the vibration element and the adhesive member and including a through-hole; an intermediate adhesive member between the back surface of the vibration element and the reinforcing member; one or more of the intermediate adhesive member and the adhesive member fills at least a portion of the through-hole; the adhesive member is connected to the reinforcing member and connected to the intermediate adhesive member at the through-portion; the reinforcing member has a size smaller than the size of the vibration element, A vibration device, wherein the through portion of the reinforcing member is located in a central portion of the vibration element.

2. The vibration device of claim 1 , wherein the reinforcing member is coupled to an edge portion of the vibration element.

3. The vibration device of claim 1 , wherein the intermediate adhesive member comprises the same material as the adhesive member.

4. the reinforcing member has an outer surface exposed outside the side surface of the vibration element, The vibration device according to claim 1 , wherein the surfaces of the reinforcing member other than the outer surface are surrounded by the intermediate adhesive member and the adhesive member.

5. The vibration device of claim 1 , wherein the modulus of the vibration element is greater than the modulus of the reinforcing member and greater than or equal to the modulus of each of the adhesive member and the intermediate adhesive member.

6. The vibration device of claim 1 , wherein the reinforcing member comprises one or more of the following materials: plastic, fiber, leather, wood, cloth, and paper.

7. The vibration device according to claim 1 , wherein the area of ​​the vibration element is larger than the area of ​​the reinforcing member.

8. a signal cable electrically connected to the vibration element; The vibration device of claim 1 further comprising an acoustic processing circuit mounted on the signal cable.

9. The vibration element is a piezoelectric vibration unit including a plurality of piezoelectric parts and a flexible part connected between the plurality of piezoelectric parts, or a piezoelectric vibration unit including a piezoelectric material; a first electrode portion on a first surface of the piezoelectric vibration portion; The vibration device according to claim 1 , further comprising: a second electrode portion on a second surface of the piezoelectric vibration portion that is different from the first surface.

10. a signal cable electrically connected between the first electrode unit and the second electrode unit; The vibration device of claim 9 further comprising an acoustic processing circuit mounted on the signal cable.

11. The vibration element is a first cover member that covers the first electrode portion; further including a second cover member that covers the second electrode portion; The signal cable a first protruding line disposed between the first cover member and the first electrode portion and electrically connected to the first electrode portion; The vibration device according to claim 10 , further comprising: a second protruding line disposed between the second cover member and the second electrode portion and electrically connected to the second electrode portion.

12. the vibration element includes two or more vibration generating units arranged along one or more of a first direction and a second direction intersecting the first direction, Each of the two or more vibration generating units is a piezoelectric vibration unit including a plurality of piezoelectric parts and a flexible part connected between the plurality of piezoelectric parts, or a piezoelectric vibration unit including a piezoelectric material; a first electrode portion on a first surface of the piezoelectric vibration portion; The vibration device according to claim 1 , further comprising: a second electrode portion on a second surface of the piezoelectric vibration portion that is different from the first surface.

13. The vibration device according to claim 12 , wherein the distance between the two or more vibration generating units is equal to or greater than 0.1 mm and less than 3 cm.

14. one or more signal cables electrically connected to the first electrode portion and the second electrode portion of each of the two or more vibration generating units; The vibration device of claim 12 , further comprising an acoustic processing circuit implemented on the one or more signal cables.

15. The vibration element is a first cover member provided on the first electrode portion of each of the two or more vibration generating units; a second cover member provided on the second electrode portion of each of the two or more vibration generating units; The one or more signal cables one or more first protruding lines disposed between the first cover member and the first electrode portions of the two or more vibration generating units and electrically connected to the first electrode portions; 15. The vibration device according to claim 14, further comprising one or more second protruding lines disposed between the second cover member and the second electrode portions of the two or more vibration generating units, and electrically connected to the second electrode portions.

16. The vibration device according to claim 15 , wherein a portion of the one or more signal cables is inserted between the first cover member and the second cover member.

17. A vibrating member; one or more vibration generating devices coupled to the vibration member; An acoustic output device, wherein the one or more vibration generating devices include a vibration device according to any one of claims 1 to 16.

18. the vibration member is configured to output sound by vibration of the one or more vibration generating devices; The acoustic output device of claim 17 , wherein the vibrating member includes one or more materials selected from the group consisting of metal, plastic, fiber, leather, wood, cloth, paper, rubber, and glass.

19. 18. The acoustic output device of claim 17, wherein the vibrating member comprises one or more of a display panel having pixels configured to display an image, a screen panel onto which an image is projected from a display device, a light-emitting diode lighting panel, a signage panel, an interior material of a transportation device, an exterior material of a transportation device, a glass window of a transportation device, a mirror, a ceiling material of a building, an interior material of a building, an exterior material of a building, a glass window of a building, an interior material of an aircraft, and a glass window of an aircraft.

20. an exterior material covering the main structure; an interior material that covers at least one of the main structure and the exterior material; a garnish member that covers a part of the interior material; one or more sound-generating devices located between at least two of the main structure, the exterior material, and the interior material, or between the garnish member and the interior material; The one or more sound-generating devices comprise a vibration device according to any one of claims 1 to 16; A transportation device, wherein one or more of the interior material, the exterior material, and the garnish member are configured to output sound by vibration of the one or more sound-generating devices.

21. 21. The transportation device of claim 20, wherein one or more of the interior material and the garnish member comprises one or more of the following materials: metal, plastic, fiber, leather, wood, cloth, paper, rubber, and glass.

22. the interior materials include at least one of a dashboard, a pillar interior material, a roof interior material, a door interior material, a seat interior material, a steering wheel interior material, a floor interior material, a rear package interior material, a rearview mirror, an overhead console, a glove box, and a sun visor; 21. The transportation device of claim 20, wherein the one or more sound-generating devices are configured to vibrate at least one or more of the dashboard, the pillar interior, the roof interior, the door interior, the seat interior, the steering wheel interior, the floor interior, the rear package interior, the rearview mirror, the overhead console, the glove compartment, and the sun visors.

23. Glass windows and 21. The transportation device of claim 20, further comprising a transparent sound-emitting device disposed in the glass window.

24. the glass window further comprises at least one of a front glass window, a side glass window, a rear glass window, and a roof glass window; 24. The transportation device of claim 23, wherein the transparent sound generating device is configured to vibrate at least one of the front glass window, the side glass window, the rear glass window, and the roof glass window.

25. The interior material includes a groove portion formed in a recessed shape on a surface facing the garnish member, 21. The delivery device of claim 20, wherein the groove accommodates the one or more sound-emitting devices coupled to the garnish member.

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