Vibrating device and device comprising a vibrating device

Abstract

A vibration device and an apparatus including the vibration device are provided. A vibration device includes a first cover member, a second cover member, a vibration portion between the first cover member and the second cover member, a contact portion between the first cover member and the vibration portion, and a signal cable including a first signal line connected to a first surface of the vibration portion and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a vibration device and a device including the vibration device. BACKGROUND

[0002] Recently, the demand for slim electronic devices is increasing. In addition, as a speaker applied to an electronic device or the like needs to be slim instead of a voice coil or use a large speaker, a piezoelectric element capable of achieving a thin thickness is being spotlighted.

[0003] A speaker or a vibration device to which a piezoelectric element is applied can be driven or vibrated by driving power or a driving signal supplied through a signal cable. However, a soldering process for various elements within the vibration device can complicate and make the design and manufacturing expensive and thicker. In addition, due to the vibration properties of the vibration device, the vibration film actuators can become disconnected from the corresponding signal cable, particularly when they are connected by soldering junctions.

[0004] A common vibration device (or film actuator) includes a film including a wire and a pad electrode for applying driving power to a piezoelectric element. The common vibration device requires a process of patterning the wire and the pad electrode on the film and a soldering process of electrically connecting the pad electrode to a signal cable. SUMMARY

[0005] The present inventors performed various experiments to implement a vibration device that can simplify a manufacturing process and a structure of the vibration device. Through the various experiments, the present inventors invented a vibration device having a new structure that can simplify a manufacturing process and a structure of the vibration device and a device including the vibration device. In addition, aspects of the present disclosure relate to providing a vibration part that can be more firmly adhered to a corresponding signal cable with a clever design capable of reducing the thickness of the vibration device, prolonging the life of the vibration device, increasing the volume of sound output by the vibration device, improving sound quality and fidelity, and simplifying a manufacturing process.

[0006] Aspects of the present disclosure relate to providing a vibration device and a device including the vibration device that can simplify a manufacturing process and a structure of the vibration device.

[0007] Another aspect of the present disclosure relates to providing a vibration device and a device including the vibration device that can minimize deterioration of sound characteristics despite using an electrode having a high surface resistance.

[0008] Additional features and aspects will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the invention concepts presented herein. The features and aspects of the invention concepts can be realized and attained by means of the instruments and combinations particularly pointed out in the appended description and associated drawings.

[0009] To achieve these and other aspects of the disclosure, as embodied and broadly described herein, a vibration device includes a first cover member, a second cover member, a vibration portion between the first cover member and the second cover member, a contact portion between the first cover member and the vibration portion, and a signal cable including a first signal line connected to a first surface of the vibration portion and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

[0010] In another aspect of the disclosure, a device includes a passive vibration member and a vibration generation device connected to the passive vibration member to vibrate the passive vibration member, the vibration generation device including a first cover member, a second cover member, a vibration portion between the first cover member and the second cover member, a contact portion between the first cover member and the vibration portion, and a signal cable including a first signal line connected to a first surface of the vibration portion and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

[0011] According to embodiments of the disclosure, it is possible to provide a vibration device and a device including the same, which can simplify a manufacturing process and structure of a vibration device.

[0012] According to embodiments of the disclosure, it is possible to provide a vibration device and a device including the same, which can minimize degradation of sound characteristics even though an electrode having a high surface resistance is used.

[0013] Other systems, methods, features, and advantages will be, or will become, apparent to one of ordinary skill in the art upon examination of the following figures and detailed description. It is intended that all such additional systems, methods, features, and advantages be included within this description and this summary, be within the scope of the disclosure, and be protected by the following claims. Nothing in this section should be taken as a limitation on those claims. Additional aspects and advantages are discussed below in conjunction with the aspects of the disclosure.

[0014] It is to be understood that both the foregoing general description and the following detailed description are illustrative and are intended to provide further explanation of the disclosure as claimed.

[0015] Paragraph 1. A vibration device, the vibration device comprising:

[0016] a first cover member;

[0017] a second cover member;

[0018] a vibration portion between the first cover member and the second cover member;

[0019] a contact portion between the first cover member and the vibration portion; and

[0020] a signal cable, the signal cable comprising:

[0021] a first signal line connected to a first surface of the vibration portion via the contact portion; and

[0022] a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

[0023] Paragraph 2. The vibration device according to Paragraph 1, wherein the vibration portion comprises:

[0024] a first electrode layer;

[0025] a second electrode layer; and

[0026] a vibration layer between the first electrode layer and the second electrode layer, the vibration layer comprising a piezoelectric material,

[0027] wherein the first signal line is electrically connected to the first electrode layer through the contact portion, and

[0028] wherein the second signal line is electrically connected to the second electrode layer.

[0029] Paragraph 3. The vibration device according to Paragraph 2, wherein a first portion of the contact portion overlaps a portion of the first electrode layer.

[0030] Paragraph 4. The vibration device according to Paragraph 2,

[0031] wherein a first portion of the contact portion is connected to a portion of the first electrode layer, and

[0032] wherein a second portion of the contact portion is connected to the first signal line.

[0033] Paragraph 5. The vibration device according to Paragraph 2,

[0034] wherein the first signal line is connected to the contact portion, and

[0035] wherein the second signal line is connected to the second electrode layer.

[0036] Paragraph 6. The vibration device according to Paragraph 2, further comprising:

[0037] a first metal line disposed on the first cover member, the first metal line connected to the first electrode layer; and

[0038] a second metal line disposed on the second electrode layer,

[0039] wherein the first signal line is electrically connected to the first metal line through the contact portion, and

[0040] wherein the second signal line is electrically connected to the second metal line.

[0041] Clause 7. The vibration device of Clause 2, further comprising:

[0042] a first metal line at the first cover member, the first metal line connected to the first electrode layer, and

[0043] a second metal line at the second cover member, the second metal line connected to the second electrode layer,

[0044] wherein the first signal line is electrically connected to the first metal line through the contact portion, and

[0045] wherein the second signal line is electrically connected to the second metal line.

[0046] Clause 8. The vibration device of Clause 1, wherein:

[0047] the vibration portion includes a first vibration portion and a second vibration portion disposed parallel to the first vibration portion,

[0048] the signal cable further includes a third signal line electrically connected to a first surface of the second vibration portion through the contact portion and a fourth signal line connected to a second surface of the second vibration portion opposite the first surface of the second vibration portion,

[0049] the first signal line is electrically connected to a first surface of the first vibration portion through the contact portion, and

[0050] the second signal line is electrically connected to a second surface of the first vibration portion opposite the first surface of the first vibration portion.

[0051] Clause 9. The vibration device of Clause 8, wherein each of the first vibration portion and the second vibration portion includes:

[0052] a vibration layer including a piezoelectric material;

[0053] a first electrode layer at a first surface of the vibration layer; and

[0054] a second electrode layer at a second surface of the vibration layer opposite the first surface.

[0055] Clause 10. The vibration device of Clause 9, wherein:

[0056] the first signal line is electrically connected to the first electrode layer of the first vibrating portion through the contact portion,

[0057] the second signal line is electrically connected to the second electrode layer of the first vibrating portion,

[0058] the third signal line is electrically connected to the first electrode layer of the second vibrating portion through the contact portion, and

[0059] the fourth signal line is electrically connected to the second electrode layer of the second vibrating portion.

[0060] Paragraph 11. The vibrating device according to Paragraph 9, wherein the contact portion includes:

[0061] a first contact member connecting the first signal line to the first electrode layer of the first vibrating portion; and

[0062] a second contact member connecting the third signal line to the first electrode layer of the second vibrating portion,

[0063] wherein the first contact member is spaced apart from the second contact member.

[0064] Paragraph 12. The vibrating device according to Paragraph 11,

[0065] wherein a portion of the first contact member overlaps the first electrode layer of the first vibrating portion, and

[0066] wherein a portion of the second contact member overlaps the first electrode layer of the second vibrating portion.

[0067] Paragraph 13. The vibrating device according to Paragraph 11,

[0068] wherein the first contact member is connected to both the first electrode layer of the first vibrating portion and the first signal line, and

[0069] wherein the second contact member is connected to both the first electrode layer of the second vibrating portion and the third signal line.

[0070] Paragraph 14. The vibrating device according to Paragraph 9, wherein the contact portion is commonly connected to both the first electrode layer of the first vibrating portion and the first electrode layer of the second vibrating portion.

[0071] Paragraph 15. The vibrating device according to Paragraph 14, wherein both the first signal line and the third signal line are commonly connected to the contact portion.

[0072] Paragraph 16. The vibration device of Paragraph 9, further comprising:

[0073] a first metal wire at the first cover member, the first metal wire connected to the first electrode layer of the first vibration portion;

[0074] a second metal wire at the second electrode layer of the first vibration portion;

[0075] a third metal wire at the first cover member, the third metal wire connected to the first electrode layer of the second vibration portion; and

[0076] a fourth metal wire at the second electrode layer of the second vibration portion.

[0077] Paragraph 17. The vibration device of Paragraph 16, wherein the contact portion comprises:

[0078] a first contact member connected to both the first signal wire and the first metal wire; and

[0079] a second contact member connected to both the third signal wire and the third metal wire,

[0080] wherein the second signal wire is connected to the second metal wire,

[0081] wherein the fourth signal wire is connected to the fourth metal wire, and

[0082] wherein the first contact member is spaced apart from the second contact member.

[0083] Paragraph 18. The vibration device of Paragraph 9, further comprising:

[0084] a first metal wire at the first cover member, the first metal wire connected to the first electrode layer of the first vibration portion;

[0085] a second metal wire at the second cover member, the second metal wire connected to the second electrode layer of the first vibration portion;

[0086] a third metal wire at the first cover member, the third metal wire connected to the first electrode layer of the second vibration portion; and

[0087] a fourth metal wire at the second cover member, the fourth metal wire connected to the second electrode layer of the second vibration portion.

[0088] Paragraph 19. The vibration device according to any one of Paragraphs 1 to 18, wherein the contact portion includes an electrically conductive double-sided adhesive member including a metal layer, a first adhesive layer, and a second adhesive layer.

[0089] Paragraph 20. The vibration device according to any one of Paragraphs 6-7, 16, or 18, wherein the first metal wire and the second metal wire include silver or copper.

[0090] Paragraph 21. The vibration device according to Paragraph 3 or 12, wherein the first electrode layer contacts a portion of the contact portion that is thinner than the first signal wire.

[0091] Paragraph 22. The vibration device according to Paragraph 2 or 9, wherein the vibration layer includes a plurality of first portions and a plurality of second portions between adjacent first portions, and

[0092] wherein the plurality of first portions include an inorganic material including a piezoelectric material, and the plurality of second portions include an organic material.

[0093] Paragraph 23. The vibration device according to Paragraph 22, wherein the plurality of first portions and the plurality of second portions are alternately and repeatedly arranged in an edge direction of the vibration layer,

[0094] wherein a widest second portion of the plurality of second portions is disposed at a central portion of the vibration layer, and

[0095] wherein a thinnest second portion of the plurality of second portions is disposed at an outer edge of the vibration layer.

[0096] Paragraph 24. The vibration device according to Paragraph 8, wherein the first vibration portion is spaced apart from the second vibration portion by a distance of 0.1 mm to 5 mm.

[0097] Paragraph 25. A device for generating vibration or sound, the device comprising:

[0098] a passive vibration member; and

[0099] a vibration generation device connected to the passive vibration member to vibrate the passive vibration member,

[0100] wherein the vibration generation device includes the vibration device according to any one of Paragraphs 1 to 18.

[0101] Paragraph 26. The device according to Paragraph 25, wherein the contact portion includes an electrically conductive double-sided adhesive member including a metal layer, a first adhesive layer, and a second adhesive layer.

[0102] Clause 27. The device of clause 25, further comprising a housing disposed at a back surface of the passive vibrating member to cover the vibration generating device.

[0103] Clause 28. The device of clause 25, wherein the passive vibrating member comprises one or more of metal, plastic, wood, paper, fiber, cloth, leather, glass, rubber, carbon, and mirror.

[0104] Clause 29. The device of clause 25, wherein the passive vibrating member comprises one or more of: a display panel comprising 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, an organic light emitting lighting panel, an inorganic light emitting lighting panel, a signage panel, a vehicle interior material, a vehicle exterior material, a vehicle glazing, a vehicle seat interior material, a building ceiling material, a building interior material, a building glazing, an aircraft interior material, an aircraft glazing, and a mirror.

[0105] Clause 30. A vibrating device, the vibrating device comprising:

[0106] a vibration portion comprising a first electrode layer, a second electrode layer, and a vibration layer disposed between the first electrode layer and the second electrode layer;

[0107] a contact portion comprising an electrically conductive material; and

[0108] a signal cable comprising:

[0109] a first signal line electrically connected to the first electrode layer of the vibration portion; and

[0110] a second signal line electrically connected to the second electrode layer of the vibration portion,

[0111] wherein the vibration portion is disposed between the second signal line of the signal cable and the contact portion.

[0112] Clause 31. The vibrating device of clause 30, wherein a portion of the second signal line extends beyond an end of the first signal line, and the portion of the second signal line overlaps the vibration portion, and

[0113] wherein the first signal line does not overlap the vibration portion.

[0114] Clause 32. The vibrating device of clause 30, further comprising:

[0115] a first metal wire disposed between the second electrode layer of the vibration portion and the second signal line; and

[0116] a second metal wire connected to the first electrode layer of the vibration portion and the contact portion,

[0117] wherein the contact portion is disposed between the second metal wire and the first signal wire.

[0118] Paragraph 33. The vibration device according to Paragraph 32, wherein the first metal wire and the second metal wire extend beyond half the length of the vibration portion.

[0119] Paragraph 34. The vibration device according to Paragraph 32, further comprising:

[0120] a first cover member; and

[0121] a second cover member,

[0122] wherein the vibration portion, the contact portion, and the signal cable are disposed between the first cover member and the second cover member, and

[0123] wherein the first metal wire contacts the first cover member, and the second metal wire contacts the second cover member.

[0124] Paragraph 35. The vibration device according to Paragraph 34, wherein the contact portion contacts the first cover member.

[0125] Paragraph 36. The vibration device according to Paragraph 30, further comprising:

[0126] a first cover member; and

[0127] a second cover member,

[0128] wherein the vibration portion, the contact portion, and the signal cable are disposed between the first cover member and the second cover member.

[0129] Paragraph 37. The vibration device according to Paragraph 36, wherein the contact portion contacts the first cover member. BRIEF DESCRIPTION OF DRAWINGS

[0130] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate aspects and embodiments of the disclosure and together with the description serve to explain the principles of the disclosure. In the drawings:

[0131] Figure 1 A vibration device according to a first embodiment of the present disclosure is illustrated.

[0132] Figure 2 is a cross-sectional view taken along the line A-A’ in Figure 1 Fig. 1.

[0133] Figure 3 is a cross-sectional view taken along the line B-B' in Figure 1

[0134] Figure 4 is a cross-sectional view taken along the line C-C' in Figure 1

[0135] Figure 5 illustrates a vibration device according to a second embodiment of the present disclosure.

[0136] Figure 6 is a cross-sectional view taken along the line D-D' in Figure 5

[0137] Figure 7 is a cross-sectional view taken along the line E-E' in Figure 5

[0138] Figure 8 is another cross-sectional view taken along the line D-D' in Figure 5

[0139] Figure 9 is another cross-sectional view taken along the line E-E' in Figure 5

[0140] Figure 10 is a perspective view illustrating a vibration layer of a vibration section according to another embodiment of the present disclosure.

[0141] Figure 11 is a perspective view illustrating another embodiment of the vibration section in Figure 10

[0142] Figure 12 is a perspective view illustrating another embodiment of the vibration section in Figure 10

[0143] Figure 13 is a perspective view illustrating another embodiment of the vibration section in Figure 10

[0144] Figure 14 illustrates a vibration device according to a fourth embodiment of the present disclosure.

[0145] Figure 15 is a cross-sectional view taken along the line F-F' in Figure 14

[0146] Figure 16 is a cross-sectional view taken along the line G-G' in Figure 14 ​​​​​​​​​​​

[0147] Figure 17 A vibration device according to a fifth embodiment of the present disclosure is exemplified.

[0148] Figure 18 is a cross-sectional view taken along Figure 17 line H-H' exemplified in FIG. 6.

[0149] Figure 19 A vibration device according to a sixth embodiment of the present disclosure is exemplified.

[0150] Figure 20 is a cross-sectional view taken along Figure 19 line I-I' exemplified in FIG. 7.

[0151] Figure 21 is a cross-sectional view taken along Figure 19 another cross-sectional view taken along line I-I' exemplified in FIG. 7.

[0152] Figure 22 A device according to an embodiment of the present disclosure is exemplified.

[0153] Figure 23 is a cross-sectional view taken along Figure 22 line J-J' exemplified in FIG. 8.

[0154] Figure 24 Sound output characteristics of the vibration devices according to the first and second embodiments of the present disclosure are exemplified.

[0155] Figure 25 Another sound output characteristics of the vibration devices according to the first and second embodiments of the present disclosure are exemplified.

[0156] In all the drawings and detailed description, unless otherwise described, it should be understood that the same reference numerals refer to the same elements, features and structures. The relative sizes of these elements can be exaggerated, for the sake of clarity, illustration and convenience. DETAILED DESCRIPTION

[0157] Reference will now be made in detail embodiments of the present disclosure, examples of which can be illustrated in the accompanying drawings. In the following description, detailed description of well-known functions and configurations associated with this document will be omitted when it is determined that it will unnecessarily obscure the gist of the inventive concept. The processes of the described processing steps and / or operations are examples; however, the order of the steps and / or operations is not limited to the order set forth herein and can be changed as known in the art, except for steps and / or operations that must occur in a particular order. The same reference numerals always indicate the same elements. The names of the corresponding elements used in the following description are selected only for the convenience of writing the specification, and thus can be different from the names used in the actual product.

[0158] The advantages and features of the present disclosure and a method of achieving the same will be clarified by the following embodiments described with reference to the accompanying drawings. The present disclosure may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Also, the present disclosure is defined only by the scope of the claims. The drawings are provided only for the purpose of illustrating embodiments of the present disclosure and are not intended to limit the present disclosure thereto. The same reference numbers in different drawings identify the same elements.

[0159] The shapes, sizes, ratios, angles, and numbers disclosed in the drawings for describing the embodiments of the present disclosure are merely examples and thus the present disclosure is not limited to the illustrated details. Like reference numerals refer to like elements throughout the description. In the following description, when it is determined that a detailed description of related known functions or configurations unnecessarily obscures the gist of the present disclosure, the detailed description will be omitted. When the terms "comprise", "have", "contain", "include", "consist of", "consist essentially of", "characterized by" or the like are used, one or more other elements can be added unless the terms such as "only" are used.

[0160] In understanding the elements, the elements are interpreted as including an error or tolerance range even when an explicit description of such an error or tolerance range is not provided.

[0161] In describing the positional relationship, for example, when "upper", "above", "lower", "over", "under", "below", "close to", "near", or "adjacent to", "next to", "immediately" or the like are used to describe the positional relationship between two parts, one or more other parts can be disposed between the two parts unless further limiting terms such as "exactly", "directly" or "close to" are used. For example, when a structure is described as being disposed "on", "above", "below", "over", "under", "below", "close to", "near" another structure, or "adjacent to", "next to", "immediately" another structure, the description should be interpreted to include the case where the structures are in contact with each other and the case where a third structure is disposed therebetween. For example, when a structure is described as being disposed "on", "above", "below", "over", "under", "below", "close to", "near" another structure, or "adjacent to", "next to", "immediately" another structure, the description should be interpreted to include the case where the structures are in contact with each other and the case where a third structure is disposed or interposed therebetween. In addition, the terms "front", "rear", "left", "right", "top", "bottom", "down", "up", "upper", "lower", and the like refer to any reference system.

[0162] In describing a relationship of time, for example, when a time sequence is described as "after," "subsequently," "then," "before," "prior," or the like, a discontinuous case can be included unless a further limiting term such as "immediately," "directly," or "just" is used.

[0163] It should be understood that, although the terms "first," "second," etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure.

[0164] In describing the elements of the present disclosure, the terms "first," "second," "A," "B," "(a)" and "(b)" can be used. These terms are intended to identify corresponding elements without necessarily limiting the basis, order, or number of the corresponding elements. The expression that an element is "connected," "coupled," or "adhered" to another element or layer means that the element or layer can be not only directly connected or adhered to the other element or layer, but also indirectly connected or adhered to the other element or layer with one or more intervening elements or layers "disposed" or "interposed" therebetween, unless otherwise specified.

[0165] The term "at least one" should be understood to include any and all combinations of one or more of the listed items. For example, the meaning of "at least one of a first item, a second item, and a third item" is that a combination of any one or more of the first item, the second item, and the third item is included.

[0166] The expression "first element, second element, and / or third element" should be understood to mean one of the first element, the second element, and the third element, or any one or all combinations of the first element, the second element, and the third element. For example, A, B, and / or C can mean only A; only B; only C; any one or some combination of A, B, and C; or all of A, B, and C.

[0167] In the present disclosure, the phrases "overlapped," "overlapping," and the like can be understood as "overlapping, for example, by face-to-face contact and electrical and / or physical connection," "overlapping, for example, by face-to-face contact and electrical and / or physical connection."

[0168] Features of various embodiments of the present disclosure can be partially or wholly coupled or combined with each other, and can cooperate with and technically drive each other in various ways, as can be fully understood by those skilled in the art. Embodiments of the present disclosure can be executed independently of each other, or can be executed together in interdependent relationships.

[0169] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, the ratio, size, and thickness of each element illustrated in the drawings are different from the true ratio, size, and thickness, and thus embodiments of the present disclosure are not limited to the ratio, size, and thickness illustrated in the drawings.

[0170] Figure 1 A vibration device 1 according to a first embodiment of the present disclosure is illustrated. Figure 2 is a cross-sectional view taken along Figure 1 line A-A' illustrated in FIG. 1. Figure 3 is a cross-sectional view taken along Figure 1 line B-B' illustrated in FIG. 1. Figure 4 is a cross-sectional view taken along Figure 1 line C-C' illustrated in FIG. 1.

[0171] Referring to Figures 1-4 , the vibration device 1 according to the first embodiment of the present disclosure can include a vibration portion 10, a first cover member 30, a second cover member 50, a contact portion 70, and a signal cable 90.

[0172] The vibration portion 10 can include a vibration layer 11, a first electrode layer 13, and a second electrode layer 15.

[0173] The vibration layer 11 can include a piezoelectric material (or an electroactive material) including a piezoelectric effect. For example, the piezoelectric material can have the following characteristics: when pressure or twisting (or bending) is applied to a crystal structure by an external force, a potential difference occurs due to dielectric polarization caused by a change in the relative position of positive (+) and negative (-) ions, and vibration is generated by an electric field based on a reverse voltage applied to it. The vibration layer 11 can be referred to as a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric material portion, an electroactive portion, a piezoelectric structure, a piezoelectric composite layer, a piezoelectric composite, or a piezoelectric ceramic composite, etc., but embodiments of the present disclosure are not limited thereto.

[0174] The vibration layer 11 can be configured as a ceramic-based material for generating a relatively high vibration, or can be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The peroviskite crystal structure can have a piezoelectric effect and a converse piezoelectric effect, and can be a structure having an orientation. The peroviskite crystal structure can be represented by a chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. For example, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be an anion. For example, the chemical formula "ABO3" can include at least one or more of lead (II) titanate (PbTiO3), lead zirconate (PbZrO3), lead zirconate titanate (PbZrTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3), but embodiments of the present disclosure are not limited thereto.

[0175] When the peroviskite crystal structure includes a central ion (e.g., PbTiO3), the position of a titanium (Ti) ion can be changed by an external force or a magnetic field. Accordingly, polarization can be changed, thereby generating a piezoelectric effect. For example, in the peroviskite crystal structure, a cubic shape corresponding to a symmetric structure can be changed to a tetragonal (e.g., quadrangular), orthorhombic, or rhombic structure corresponding to an asymmetric structure, and thus a piezoelectric effect can be generated. In the tetragonal (e.g., quadrangular), orthorhombic, or rhombic structure corresponding to the asymmetric structure, polarization can be high in a morphotropic phase boundary, and rearrangement of polarization can be easy, and thus the peroviskite crystal structure can have a high piezoelectric property.

[0176] The vibration layer 11 according to another embodiment of the present disclosure can include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but embodiments of the present disclosure are not limited thereto.

[0177] The vibration layer 11 according to another embodiment of the present disclosure can include a lead zirconium titanate (PZT)-based material including lead (Pb), zirconium (Zr), and titanium (Ti), or can include a lead zirconate nickel niobate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but embodiments of the present disclosure are not limited thereto. Alternatively, the vibration layer 11 can include at least one or more of calcium titanate (CaTiO3), BaTiO3, and SrTiO3, each of which does not include lead (Pb), but embodiments of the present disclosure are not limited thereto.

[0178] The first electrode layer 13 can be disposed at a first surface (or a lower surface) of the vibration layer 11. The first electrode layer 13 can have the same size as the vibration layer 11, or can have a size smaller than the vibration layer 11. For example, the first electrode layer 13 can be formed at the entire first surface of the vibration layer 11 except for a peripheral portion.

[0179] The second electrode layer 15 can be disposed at a second surface (or an upper surface) opposite or different from the first surface of the vibration layer 11. The second electrode layer 15 can have the same size as the vibration layer 11, or can have a size smaller than the vibration layer 11. For example, the second electrode layer 15 can be formed at the entire second surface of the vibration layer 11 except for the peripheral portion. The second electrode layer 15 can have the same shape as the vibration layer 11, but embodiments of the disclosure are not limited thereto.

[0180] Each of the first electrode layer 13 and the second electrode layer 15 according to embodiments of the disclosure can include carbon, but embodiments of the disclosure are not limited thereto. For example, one or more of the first electrode layer 13 and the second electrode layer 15 can be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material can include indium tin oxide (ITO) or indium zinc oxide (IZO), but embodiments of the disclosure are not limited thereto. The opaque conductive material can include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), or a glass frit-containing silver (Ag), but embodiments of the disclosure are not limited thereto. According to another embodiment of the disclosure, in order to enhance the electrical properties and / or the vibration properties of the vibration layer 11, each of the first electrode layer 13 and the second electrode layer 15 can include Ag having a low resistivity. For example, the carbon can be carbon black, Ketjen black, carbon nanotubes, and carbon materials including graphite, but embodiments of the disclosure are not limited thereto.

[0181] The first cover member 30 can be disposed at the first surface of the vibration portion 10. For example, the first cover member 30 can be configured to cover the first electrode layer 13 of the vibration portion 10. Accordingly, the first cover member 30 can protect the first surface and the first electrode layer 13 of the vibration portion 10.

[0182] The second cover member 50 can be disposed at the second surface of the vibration portion 10. For example, the second cover member 50 can be configured to cover the second electrode layer 15 of the vibration portion 10. Accordingly, the second cover member 50 can protect the second surface and the second electrode layer 15 of the vibration portion 10.

[0183] The first cover member 30 and the second cover member 50 according to embodiments of the disclosure can each include one or more materials of plastic, fiber, cloth, paper, leather, rubber, and wood, but embodiments of the disclosure are not limited thereto. For example, each of the first cover member 30 and the second cover member 50 can include the same material or different materials. For example, each of the first cover member 30 and the second cover member 50 can be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but embodiments of the disclosure are not limited thereto.

[0184] One or more of the first cover member 30 and the second cover member 50 according to the embodiments of the disclosure can include an adhesive member. For example, one or more of the first cover member 30 and the second cover member 50 can include an adhesive member coupled or attached to the vibration part 10 and a protective member (or a peeling member) covering or protecting the adhesive member. For example, the adhesive member can include an electrically insulating material having adhesive properties and capable of compression and decompression. For example, the first cover member 30 can include an adhesive member coupled or attached to the vibration part 10 and a protective member (or a peeling member) covering or protecting the adhesive member.

[0185] The first cover member 30 can be connected or coupled to the first surface or the first electrode layer 13 of the vibration part 10 by the first adhesive layer 41 as an example of the above-described adhesive member. For example, the first cover member 30 can be connected or coupled to the first surface or the first electrode layer 13 of the vibration part 10 by a film lamination process using the first adhesive layer 41.

[0186] The second cover member 50 can be connected or coupled to the second surface or the second electrode layer 15 of the vibration part 10 by the second adhesive layer 42 as an example of the above-described adhesive member. For example, the second cover member 50 can be connected or coupled to the second surface or the second electrode layer 15 of the vibration part 10 by a film lamination process using the second adhesive layer 42.

[0187] Each of the first adhesive layer 41 and the second adhesive layer 42 according to the embodiments of the disclosure can include an electrically insulating material having adhesive properties and capable of compression and decompression. For example, each of the first adhesive layer 41 and the second adhesive layer 42 can include an epoxy resin, an acrylic resin, a silicone resin, or a polyurethane resin, but the embodiments of the disclosure are not limited thereto.

[0188] The contact portion 70 can be disposed at one peripheral portion EP of the first cover member 30 and can be electrically connected to the vibration portion 10. For example, a portion of the contact portion 70 can overlap or be stacked with a portion of the vibration portion 10. For example, a portion of the contact portion 70 can be in electrical contact with a portion of the vibration portion 10. For example, a portion of the contact portion 70 can directly contact a portion of the vibration portion 10. For example, a first portion of the contact portion 70 can overlap with a portion of the first electrode layer 13. For example, the first portion of the contact portion 70 can be connected to a portion of the first electrode layer 13. For example, a portion of the contact portion 70 can be in electrical contact with the first electrode layer 13 of the vibration portion 10. For example, half of the contact portion 70 can directly contact the first electrode layer 13 of the vibration portion 10. Another portion of the contact portion 70 can not overlap or be stacked with the vibration portion 10 and can be exposed at one peripheral portion of the first cover member 30. For example, the contact portion 70 can be configured in an island shape at one peripheral portion EP of the first cover member 30 (for example, about half of the contact portion 70 can protrude from below the vibration portion 10. Similar to a tap type structure).

[0189] The contact portion 70 can include a conductive double-sided adhesive member. The contact portion 70 can include a conductive double-sided tape, a conductive double-sided pad, or a conductive double-sided cushion tape, but embodiments of the present disclosure are not limited thereto. The contact portion 70 according to an embodiment of the present disclosure can include a metal layer 71, a first adhesive layer 72 (e.g., an adhesive layer) coupled (or connected) to a first surface of the metal layer 71 and electrically contacting or connected to the first electrode layer 13 of the vibration portion 10, and a second adhesive layer 73 (e.g., an adhesive layer) coupled to a second surface of the metal layer 71 and coupled or attached to the first cover member 30.

[0190] The metal layer 71 can include a copper (Cu) material, but embodiments of the present disclosure are not limited thereto. The first adhesive layer 72 can include or contain a conductive material so as to be electrically connected to or in contact with the first electrode layer 13 of the vibration portion 10. The second adhesive layer 73 can include only an adhesive material, or can include or contain a conductive material.

[0191] In the vibration portion 10, a portion of one peripheral portion of the first electrode layer 13 can be disposed at one peripheral portion EP of the first cover member 30 and can be supported by the contact portion 70. The other portion of the one peripheral portion of the first electrode layer 13 except for the portion can be supported by the first adhesive layer 41, or can be coupled or attached to the inner surface of the first cover member 30 through the first adhesive layer 41.

[0192] The signal cable 90 can be electrically connected to each of the first electrode layer 13 and the second electrode layer 15 of the vibration portion 10 at one side of the vibration portion 10. An end portion (or a distal end portion) of the signal cable 90 can be disposed at or inserted into a region (or a portion) between one peripheral portion EP of the first cover member 30 and one peripheral portion EP of the second cover member 50. For example, the signal cable 90 can be sandwiched between the upper surface of the second electrode layer 15 and the second cover member 50, and a portion of the second adhesive layer 42 can be located between the second cover member 50 and the signal cable 90. One peripheral portion EP of the first cover member 30 and one peripheral portion EP of the second cover member 50 can accommodate a portion of the signal cable 90, or can vertically cover a portion of the signal cable 90. Accordingly, the signal cable 90 can be integrated with the vibration portion 10, or can be configured to be integral with the vibration portion 10. For example, the vibration device 1 according to the first embodiment of the present disclosure can be a vibration device integrated with or configured to be integral with the signal cable 90. For example, the signal cable 90 can be a flexible cable, 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, but embodiments of the present disclosure are not limited thereto. For example, the vibration portion 10 can be sandwiched between the signal cable 90 and the contact portion 70 to form a structure between the first cover member 30 and the second cover member 50.

[0193] The signal cable 90 according to an embodiment of the present disclosure can include a base member 91, a first signal line 92a, and a second signal line 92b.

[0194] The base member 91 can include a transparent or non-transparent plastic material. For example, the base member 91 can be implemented with one or more of synthetic resins including fluorine-containing resins, polyimide-based resins, polyurethane-based resins, polyester-based resins, polyvinyl-based resins, and polypropylene-based resins, but embodiments are not limited thereto. The base member 91 can be a base film or a base insulating film, but embodiments are not limited thereto.

[0195] The base member 91 can have a certain width in the first direction X, and can be long in extension along a second direction Y intersecting the first direction X.

[0196] The first signal line 92a can be disposed at the first surface of the base member 91 in parallel to the second direction Y. The second signal line 92b can be disposed at the first surface of the base member 91 in parallel to the second direction Y, and can be spaced apart from the first signal line 92a. The first signal line 92a and the second signal line 92b can be arranged in parallel at the first surface of the base member 91. For example, the first signal line 92a and the second signal line 92b can be implemented in a linear shape by patterning a metal layer (or a conductive layer) formed or deposited at the first surface of the base member 91.

[0197] The first signal line 92a and the second signal line 92b can have different lengths. For example, the second signal line 92b can extend more than the end of the first signal line 92a (e.g., the end of the second signal line 92b extends beyond the end of the first signal line 92a, see Figure 1 and Figure 4 ). Thus, the first portion of the base member 91 that overlaps the second signal line 92b can extend more than the end of the first signal line 92a, and thus, the base member 91 or the signal cable 90 can include an extension 90a that corresponds to the end portion of the second signal line 92b.

[0198] The end portion (or distal portion) of the first signal line 92a can be electrically connected to the contact portion 70. For example, the end portion (or distal portion) of the first signal line 92a can be directly connected to the contact portion 70. For example, the end portion (or distal portion) of the first signal line 92a can be directly connected to the contact portion 70 at one peripheral portion EP of the first cover member 30. For example, a second portion of the contact portion 70 is connected to the first signal line 92a. The first signal line 92a can be attached on or in contact with the first adhesive layer 72 (e.g., adhesive layer) of the contact portion 70, and thus, can be electrically connected to or in contact with the first electrode layer 13 of the vibration portion 10 through the first adhesive layer 72 and / or the metal layer 71 of the contact portion 70. Thus, the first signal line 92a can supply the driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the vibration portion 10. For example, the first signal line 92a can stop shorting to connect to the contact portion 70 under the vibration portion 10, while the second signal line 92b extends further to connect to the upper surface of the vibration portion 10.

[0199] The end portion (or distal portion) of the second signal line 92b can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10. For example, the extension 90a of the signal cable 90 can pass through one peripheral portion EP of the second cover member 50, and can be disposed between the second cover member 50 and the vibration portion 10, and the second signal line 92b disposed at the extension 90a can be directly connected to or in contact with the second electrode layer 15 of the vibration portion 10. Accordingly, the second signal line 92b can supply the driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the vibration portion 10. In other words, the signal cable 90 has a “split” arrangement in which one side corresponding to the first signal line 92a is connected under the vibration portion 10, and the other side corresponding to the second signal line 92b is connected to the top of the vibration portion 10 (e.g., the signal cable 90 forms a “fork tongue” type connection structure for connecting the electrodes of the vibration portion 10 to the signal lines together with the contact portion 70).

[0200] The signal cable 90 according to the embodiment of the disclosure can further include an insulating layer 93 (see, for example, Figure 4 ).

[0201] The insulating layer 93 can be provided at the first surface of the base member 91 to cover each of the first signal line 92a and the second signal line 92b except for the end portion (or distal end portion) of the signal cable 90. The insulating layer 93 can be a protective layer, a cover layer, a cover layer film, a cover film, or a cover insulating film, but embodiments are not limited thereto. For example, the first signal line 92a and the second signal line 92b are disposed between the base member 91 and the insulating layer 93, in which a portion of the insulating layer 93 can be shaved to expose the end of the first signal line 92a and the end of the second signal line 92b.

[0202] The end portion (or distal end portion) of the signal cable 90 inserted between the first cover member 30 and the second cover member 50 can be inserted or fixed between the first cover member 30 and the second cover member 50 by using a film lamination process of the first adhesive layer 41 formed in the first cover member 30 and the second adhesive layer 42 formed in the second cover member 50. Accordingly, the first signal line 92a can be stably maintained while being electrically connected to the contact portion 70, and the second signal line 92b can be stably maintained while being electrically connected to the second electrode layer 15 of the vibration portion 10. In addition, the end portion (or distal end portion) of the signal cable 90 can be inserted or fixed between the first cover member 30 and the second cover member 50, and thus, a contact defect between the vibration portion 10 and the signal cable 90 caused by movement of the signal cable 90 can be prevented (for example, the end of the first signal line 92a and the end of the second signal line 92b can be firmly maintained in place even when the vibration portion 10 vibrates).

[0203] The contact portion 70 can be implemented to prevent or minimize breakage or damage of the vibration portion occurring due to a step height between the first signal line 92a and the second signal line 92b in the film lamination process. For example, in the absence of the contact portion 70, the first signal line 92a and the second signal line 92b can be arranged alternately with the vibration portion 10 therebetween, and then, upon performing the film lamination process, the first signal line 92a can serve as a support of the vibration layer 11, and breakage can occur in the vibration layer 11 between the first signal line 92a and the second signal line 92b based on the pressing of the second cover member 50, thereby causing a decrease in reliability of the vibration device. For example, the contact portion 70 can contribute to a decrease in any distortion or breakage of the vibration portion 10 and the base member 91. According to the embodiment of the disclosure, the first electrode layer 13 of the vibration portion 10 can contact a portion of the contact portion 70 that is relatively thinner than the first signal line 92a, and thus, a step height between the second signal line 92b and the contact portion 70 can be decreased, thereby preventing or minimizing breakage or damage of the vibration portion 10 occurring in the film lamination process.

[0204] In the vibration device 1 according to the first embodiment of the disclosure, the first signal line 92a of the signal cable 90 can be connected to the first electrode layer 13 of the vibration portion 10 through the contact portion 70, and the second signal line 92b of the signal cable 90 can be connected to the second electrode layer 15 of the vibration portion 10, and thus, a soldering process for electrical connection between the vibration portion 10 and the signal cable 90 can not be required, thereby simplifying a manufacturing process and a structure of the vibration device 1. Further, in the vibration device 1 according to the first embodiment of the disclosure, a driving signal can be supplied to the first electrode layer 13 and the second electrode layer 15 of the vibration portion 10 through the signal cable 90, and thus, electrical characteristics such as resistivity of the first electrode layer 13 and the second electrode layer 15 can be supplemented.

[0205] Figure 5 A vibration device according to a second embodiment of the disclosure is exemplified. Figure 6 is a cross-sectional view taken along Figure 5 line D-D' exemplified in FIG. 4. Figure 7 is a cross-sectional view taken along Figure 5 line E-E' exemplified in FIG. 5. Figures 5-7 An embodiment in which a metal wire is additionally configured in the vibration device described above with reference to Figures 1-4 is exemplified. Thus, in the description of Figures 5-7 , other elements except for the metal wire and related elements are referred to by similar reference numerals, and a repetitive description thereof can be omitted.

[0206] With reference to Figures 5-7 , the vibration device 2 according to the second embodiment of the disclosure can include a first metal wire 33 and a second metal wire 35.

[0207] The first metal wire 33 can be provided at the first cover member 30 and can be electrically connected to or in contact with the first electrode layer 13 of the vibration portion 10. For example, the first metal wire 33 can extend from one peripheral portion EP of the first cover member 30 along the second direction Y to overlap the vibration portion 10. For example, with respect to the second direction Y, the first metal wire 33 can have the same length as the vibration portion 10, or can have a length greater than or equal to half the length of the vibration portion 10. For example, the first metal wire 33 can be disposed close to the central portion of the vibration portion 10.

[0208] The first metal wire 33 can be implemented with a conductive material having a low resistivity to prevent or minimize a decrease in the electrical characteristics and the vibration characteristics of the vibration portion 10 caused by the resistivity of the first electrode layer 13. For example, the first metal wire 33 can be applied when the first electrode layer 13 has a high resistivity. For example, the first metal wire 33 can include a metal material such as Cu, but embodiments of the present disclosure are not limited thereto. For example, the first metal wire 33 can be formed to have a relatively large width so as to prevent or minimize a decrease in the electrical characteristics (e.g., prevent a voltage drop) and the vibration characteristics of the vibration portion 10 when the first electrode layer 13 has a high resistivity. For example, with respect to the first direction X (or the width direction), the width of the first metal wire 33 can be greater than or equal to 1 / 20 of the width (or the horizontal width) of the vibration portion 10. For example, when the width (or the horizontal width) of the vibration portion 10 is 6 cm, the width of the first metal wire 33 can be 0.3 cm or more.

[0209] The first metal wire 33 can be electrically connected to or in contact with the first signal line 92a of the signal cable 90 through the contact portion 70 at one peripheral portion EP of the first cover member 30. Accordingly, the first signal line 92a can be electrically connected to or in contact with the first electrode layer 13 of the vibration portion 10 through the contact portion 70 and the first metal wire 33, thereby transmitting or supplying a driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the vibration portion 10.

[0210] In the vibration device 2 according to the second embodiment of the present disclosure, the contact portion 70 can be disposed or interposed between the first metal wire 33 and the first signal line 92a. The contact portion 70 can be implemented to be electrically connected to or in contact with the first metal wire 33 and the first signal line 92a, and can be spaced apart from the vibration portion 10 without electrically contacting the vibration portion 10 in one peripheral portion EP of the first cover member 30.

[0211] The second metal wire 35 can be disposed between the second electrode layer 15 of the vibration portion 10 and the second cover member 50, and can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10. For example, the second metal wire 35 can be formed to directly contact the second electrode layer 15 of the vibration portion 10 without a medium. For example, the second metal wire 35 can extend a long distance from one of the peripheral portions EP of the second cover member 50 along the second direction Y to overlap the vibration portion 10. For example, with respect to the second direction Y, the second metal wire 35 can have the same length as the vibration portion 10, or can have a length greater than or equal to half the length of the vibration portion 10. For example, the second metal wire 35 can be disposed close to the central portion of the vibration portion 10.

[0212] The second metal wire 35 can be implemented with a conductive material having a low resistivity to prevent or minimize a decrease in the electrical characteristics (e.g., prevent a voltage drop) and the vibration characteristics of the vibration portion 10 caused by the resistivity of the second electrode layer 15. For example, the second metal wire 35 can be applied when the second electrode layer 15 has a high resistivity. For example, the second metal wire 35 can include a metal material such as Cu, but embodiments of the present disclosure are not limited thereto. For example, the second metal wire 35 can be formed to have a relatively large width so as to prevent or minimize a decrease in the electrical characteristics and the vibration characteristics of the vibration portion 10 when the second electrode layer 15 has a high resistivity. For example, with respect to the first direction X (or the width direction), the width of the second metal wire 35 can be greater than or equal to 1 / 20 of the width (or the horizontal width) of the vibration portion 10. For example, when the width (or the horizontal width) of the vibration portion 10 is 6 cm, the width of the second metal wire 35 can be 0.3 cm or more, and can be the same as or different from the width of the first metal wire 33.

[0213] The second metal wire 35 can be electrically connected to or in contact with an end portion (or a distal end portion) of the second signal line 92b. The end portion (or the distal end portion) of the second signal line 92b can be directly connected to or in contact with the second metal wire 35 above the vibration portion 10. Accordingly, the second signal line 92b can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10 through the second metal wire 35, thereby transmitting or supplying a driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the vibration portion 10. For example, the configuration in the second embodiment is similar to that of the first embodiment, but the first metal wire 33 and the second metal wire 35 are added, which can extend the "fork tongue" type connection structure for connecting the electrodes of the vibration portion 10 to the signal lines, in which the first metal wire 33 is connected to the lower side of the vibration portion 10, and the second metal wire 35 is connected to the top of the vibration portion 10. In addition, the first metal wire 33 and the second metal wire 35 are disposed close to the center of the vibration portion, and are equal to or greater than half or more of the length of the vibration portion 10. In this way, the voltage can be uniformly distributed on the vibration portion 10, and the vibration portion 10 can be more effectively controlled when providing vibration.

[0214] In the vibration device 2 according to the second embodiment of the present disclosure, a soldering process for electrical connection between the vibration portion 10 and the signal cable 90 can not be required, thereby simplifying the manufacturing process and structure of the vibration device 2. In addition, in the vibration device 2 according to the second embodiment of the present disclosure, the driving signal can be supplied to the first electrode layer 13 and the second electrode layer 15 of the vibration portion 10 through the metal wires 33 and 35 having low electrical resistivity, and thus, the electrical characteristics such as the electrical resistivity of the first electrode layer 13 and the second electrode layer 15 can be supplemented (for example, the voltage drop can be prevented or minimized, and the voltage can be uniformly distributed even when the vibration portion 10 has a large area).

[0215] Figure 8 is another cross-sectional view taken along the line D-D' illustrated in FIG. 6. Figure 5 is another cross-sectional view taken along the line E-E' illustrated in FIG. 7. Figure 9 is another cross-sectional view taken along the line D-D' illustrated in FIG. 6. Figure 5 is another cross-sectional view taken along the line E-E' illustrated in FIG. 7. Figures 8-9 Embodiments achieved by modifying the second metal wire in the vibration device described above with reference to Figures 5-7 Thus, in the descriptions of Figure 8 and Figure 9 , other elements than the second metal wire and related elements are referred to by similar reference numerals, and repeated descriptions thereof can be omitted.

[0216] Reference is made to Figure 8 and Figure 9In the vibration device 3 according to the third embodiment of the present disclosure, the second metal wire 35 can be provided at the second cover member 50 and can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10. For example, the second metal wire 35 can extend long from one peripheral portion EP of the second cover member 50 along the second direction Y to overlap the vibration portion 10. For example, with respect to the second direction Y, the second metal wire 35 can have the same length as the vibration portion 10, or can have a length greater than or equal to half the length of the vibration portion 10.

[0217] The second metal wire 35 can be implemented with a conductive material having a low resistivity to prevent or minimize a decrease in the electrical characteristics and vibration characteristics of the vibration portion 10 caused by the resistivity of the second electrode layer 15. For example, the second metal wire 35 can be applied when the second electrode layer 15 has a high resistivity. For example, the second metal wire 35 can include a metal material such as Cu, but embodiments of the present disclosure are not limited thereto.

[0218] The second signal line 92b of the signal cable 90 can be provided at a second surface of the base member 91 opposite the first surface. For example, the signal cable 90 can include a double-sided wire structure. The second signal line 92b can be covered by the second insulating layer 94. For example, the base member 91 can be disposed between the second electrode layer 15 and the second signal line 92b, and the second signal line 92b can be disposed between the base member 91 and the second metal wire 35. In this way, a plurality of layers can be intertwined together to form a strong physical connection between the signal cable 90 and the vibration portion 10.

[0219] An end portion (or distal end portion) of the second signal line 92b can be disposed or inserted between one peripheral portion EP of the second cover member 50 and the vibration portion 10, and can be electrically connected to or in contact with the second metal wire 35.

[0220] One peripheral portion of the second metal wire 35 provided at one peripheral portion EP of the second cover member 50 can be electrically connected to or in contact with the second signal line 92b of the signal cable 90. Other portions of the second metal wire 35 except for one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10 by using a film lamination process of the second adhesive layer 42. For example, the other portions of the second metal wire 35 except for one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the vibration portion 10 by pressing of the second cover member 50 based on the film lamination process. The second cover member 50 can have flexibility, and thus, can be bent in a curved shape at a stepped portion between the end portion of the second signal line 92b and the second electrode layer 15 of the vibration portion 10, whereby the second metal wire 35 can be bent toward the second electrode layer 15 of the vibration portion 10 as the second cover member 50 is bent. For example, various layers can be intertwined.

[0221] In the vibration device 3 according to the third embodiment of the present disclosure, a soldering process for electrical connection between the vibration portion 10 and the signal cable 90 can not be needed, thereby simplifying the manufacturing process and structure of the vibration device 2. Further, in the vibration device 3 according to the third embodiment of the present disclosure, the drive signal can be supplied to the first electrode layer 13 and the second electrode layer 15 of the vibration portion 10 through the metal wires 33 and 35 having low electrical resistivity, and thus, the electrical characteristics such as the electrical resistivity of the first electrode layer 13 and the second electrode layer 15 can be supplemented. In addition, in the vibration device 3 according to the third embodiment of the present disclosure, the first metal wire 33 and the second metal wire 35 can all be disposed in the corresponding cover members 30 and 50 as compared with the vibration device 2 according to the second embodiment of the present disclosure, and thus, the manufacturing process can be further simplified.

[0222] Figure 10 is a perspective view illustrating a vibration layer of a vibration portion according to another embodiment of the present disclosure. Figure 10 is a perspective view illustrating Figures 2-4 and Figures 6-9 the vibration layer illustrated in

[0223] Referring to Figure 10 , the vibration layer 11 according to another embodiment of the present disclosure can include a plurality of first portions 11a and a plurality of second portions 11b. For example, the plurality of first portions 11a and the plurality of second portions 11b can be alternately and repeatedly arranged along a first direction X (or a second direction Y) (for example, in an alternate stripe pattern). For example, the first direction X can be a width direction of the vibration layer 11, and the second direction Y can be a length direction of the vibration layer 11, but embodiments of the present disclosure are not limited thereto, and the first direction X can be a length direction of the vibration layer 11, and the second direction Y can be a width direction of the vibration layer 11.

[0224] Each of the plurality of first portions 11a can be configured as an inorganic material portion. The inorganic material portion can include a piezoelectric material, a composite piezoelectric material, or an electroactive material including a piezoelectric effect.

[0225] Each of the plurality of first portions 11a can be configured as a ceramic-based material for generating a relatively high vibration, or can be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure can have a piezoelectric effect and a converse piezoelectric effect, and can be a structure having an orientation. The perovskite crystal structure can be represented by a chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. As an embodiment of the disclosure, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be an anion. For example, each of the plurality of first portions 11a can include at least one or more of lead (II) titanate (PbTiO3), lead zirconate (PbZrO3), lead zirconate titanate (PbZrTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3), but embodiments of the disclosure are not limited thereto.

[0226] Each of the plurality of first portions 11a according to an embodiment of the disclosure can be disposed between the plurality of second portions 11b, and can 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 11b can have a second width W2 parallel to the first direction X (or the second direction Y), and can have a length parallel to the second direction Y (or the first direction X). The first width W1 can be the same as or different from the second width W2. For example, the first width W1 can be greater than the second width W2. For example, the first portions 11a and the second portions 11b can include a linear or stripe shape having the same size or different sizes. Accordingly, the vibration layer 11 can include a 2-2 composite structure having a piezoelectric property of a 2-2 vibration mode, and thus, can have a resonance frequency of 20 kHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration layer 11 can vary based on at least one or more of a shape, a length, and a thickness, etc.

[0227] In the vibration layer 11, each of the plurality of first portions 11a and the plurality of second portions 11b can be disposed (or arranged) in parallel at the same plane (or the same layer). Each of the plurality of second portions 11b can be configured to fill a gap between two adjacent first portions of the plurality of first portions 11a, and can be connected or attached to the first portions 11a adjacent thereto. Accordingly, based on the side coupling (or connection) of the first portions 11a and the second portions 11b, the vibration layer 11 can extend a desired size or length.

[0228] In the vibration layer 11, the width (or size) W2 of each of the plurality of second portions 11b can gradually decrease in a direction from a central portion of the vibration layer 11 or the vibration device 1, 2, and 3 to both peripheries (or both end portions or both portions).

[0229] According to embodiments of the present disclosure, the second portion 11b among the plurality of second portions 11b having the largest width W2 can be located at a portion where the highest stress can concentrate when the vibration layer 11 or the vibration device 1, 2, and 3 is vibrated in the vertical direction Z (or the thickness direction). The second portion 11b among the plurality of second portions 11b having the smallest width W2 can be located at a portion where a relatively low stress can occur when the vibration layer 11 or the vibration device 1, 2, and 3 is vibrated in the vertical direction Z. For example, the second portion 11b among the plurality of second portions 11b having the largest width W2 can be disposed at a central portion of the vibration layer 11, and the second portion 11b among the plurality of second portions 11b having the smallest width W2 can be disposed at each of both peripheries of the vibration layer 11. Accordingly, when the vibration layer 11 or the vibration device 1, 2, and 3 is vibrated in the vertical direction Z, an overlap of interference or resonance frequencies of sound waves each occurring in a portion where the highest stress concentrates can be reduced or minimized. Accordingly, a drop phenomenon of a sound pressure level occurring in a low-pitch sound band can be reduced, thereby improving flatness of a sound characteristic in the low-pitch sound band. For example, the flatness of the sound characteristic can be a magnitude of a deviation between a highest sound pressure level and a lowest sound pressure level.

[0230] In the vibration layer 11, each of the plurality of first portions 11a can have a different size (or width). For example, the size (or width) of each of the plurality of first portions 11a can gradually decrease or increase in a direction from a central portion of the vibration layer 11 or the vibration device 1, 2, and 3 to both peripheries (or both end portions or both portions). For example, in the vibration layer 11, based on various natural vibration frequencies according to vibrations of each of the plurality of first portions 11a having different sizes, a sound pressure level characteristic of sound can be enhanced and a sound reproduction band can be increased.

[0231] The plurality of second portions 11b can be disposed between the plurality of first portions 11a. Accordingly, in the vibration layer 11 or the vibration device 1, 2, and 3, vibration energy caused by linking in a unit cell of each first portion 11a can be increased due to the corresponding second portion 11b, and thus, a vibration characteristic can be improved and piezoelectric characteristics and flexibility can be secured. For example, the second portion 11b can include one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but embodiments of the present disclosure are not limited thereto.

[0232] The plurality of second portions 11b according to the embodiments of the disclosure can be configured as organic material portions. For example, the organic material portions can be disposed between the inorganic material portions, and thus, can absorb an impact applied to the inorganic material portions (or first portions), can release stress concentrated on the inorganic material portions to enhance the overall durability of the vibration layer 11 or the vibration devices 1, 2, and 3, and can provide flexibility to the vibration layer 11 or the vibration devices 1, 2, and 3. Accordingly, the vibration devices 1, 2, and 3 can have flexibility, and thus, can be bent into a shape matching a shape of a curved portion configured in a vibration member or a vibrating object. For example, the vibration devices 1, 2, and 3 can have flexibility, and thus, can be disposed along a shape corresponding to a shape of a curved portion of a vibration member or a vibrating object.

[0233] The plurality of second portions 11b according to the embodiments of the disclosure can have a modulus (or Young's modulus) and viscoelasticity lower than those of each first portion 11a, and thus, the second portions 11b can enhance reliability of each first portion 11a vulnerable to an impact due to a fragile characteristic. For example, the second portions 11b can be configured as a material having a loss coefficient of about 0.01 to about 1 (e.g., 0.5) and a modulus of about 0.1 GPa (Gigapascal) to about 10 GPa (Gigapascal) (e.g., 5 GPa).

[0234] The organic material portions configured at the second portions 11b can include one or more of an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having a flexible characteristic compared to the inorganic material portions of the first portions 11a. For example, the second portions 11b can be referred to as adhesive portions, elastic portions, curved portions, damping portions, or flexible portions, etc. all having flexibility, but the embodiments of the disclosure are not limited thereto.

[0235] The plurality of first portions 11a and the plurality of second portions 11b can be disposed on (or connected to) the same plane, and thus the vibration layer 11 according to the embodiment of the disclosure can have a single membrane type. For example, the vibration layer 11 can have a structure in which the plurality of first portions 11a is connected to one side. For example, the plurality of first portions 11a can have a structure connected to the entire vibration layer 11. For example, the vibration layer 11 can vibrate in a vertical direction through the first portion 11a having a vibration characteristic, and can be bent into a curved shape through the second portion 11b having flexibility. Also, in the vibration layer 11 according to the embodiment of the disclosure, the size of the first portion 11a and the size of the second portion 11b can be adjusted based on the piezoelectric characteristic and the flexibility required for the vibration layer 11 or the vibration devices 1, 2, and 3. As an embodiment of the disclosure, when the vibration layer 11 requires a piezoelectric characteristic rather than flexibility, the size of the first portion 11a can be adjusted to be greater than the size of the second portion 11b. As another embodiment of the disclosure, when the vibration layer 11 requires flexibility rather than a piezoelectric characteristic, the size of the second portion 11b can be adjusted to be greater than the size of the first portion 11a. Accordingly, the size of the vibration layer 11 can be adjusted based on the characteristic required thereof, and thus the vibration layer 11 can be adjusted to satisfy various requirements.

[0236] The first electrode layer 13 can be disposed at the first surface (or lower surface) of the vibration layer 11. The first electrode layer 13 can be commonly disposed at (or coupled to) the first surface of each of the plurality of first portions 11a and the first surface of each of the plurality of second portions 11b, and can be electrically connected to the first surface of each of the plurality of first portions 11a. For example, the first electrode layer 13 can be a single electrode (or one electrode) shape disposed at the entire first surface of the vibration layer 11. For example, the first electrode layer 13 can have substantially the same shape as the vibration layer 11, but embodiments of the disclosure are not limited thereto.

[0237] The second electrode layer 15 can be disposed at a second surface (or upper surface) different from (or opposite to) the first surface of the vibration layer 11. The second electrode layer 15 can be commonly disposed at (or coupled to) the second surface of each of the plurality of first portions 11a and the second surface of each of the plurality of second portions 11b, and can be electrically connected to the second surface of each of the plurality of first portions 11a. For example, the second electrode layer 15 can be a single electrode (or one electrode) shape disposed at the entire second surface of the vibration layer 11. The second electrode layer 15 can have the same shape as the vibration layer 11, but embodiments of the disclosure are not limited thereto.

[0238] One or more of the first electrode layer 13 and the second electrode layer 15 according to the embodiment of the disclosure can be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material can include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiment of the disclosure is not limited thereto. The opaque conductive material can include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), or a glass frit-containing silver (Ag), but the embodiment of the disclosure is not limited thereto. According to another embodiment of the disclosure, in order to enhance the electrical properties and / or the vibration properties of the vibration layer 11, each of the first electrode layer 13 and the second electrode layer 15 can include Ag having a low resistivity. For example, the carbon can be carbon black, Ketjen black, carbon nanotubes, and carbon materials including graphite, but the embodiment of the disclosure is not limited thereto.

[0239] The vibration layer 11 can be polarized (polarized) due to a certain voltage applied to the first electrode layer 13 and the second electrode layer 15 in a certain temperature atmosphere or a temperature atmosphere that can change from a high temperature to a room temperature, but the embodiment of the disclosure is not limited thereto. For example, the vibration layer 11 can contract or expand alternately and repeatedly based on the inverse piezoelectric effect according to a sound signal (or a voice signal or a driving signal) applied from the outside to the first electrode layer 13 and the second electrode layer 15, thereby vibrating. For example, the vibration layer 11 can vibrate based on vertical direction vibration and planar direction vibration through the sound signal applied to the first electrode layer 13 and the second electrode layer 15. The vibration layer 11 can increase the displacement of the vibration member through the contraction and / or expansion in the planar direction, thereby further improving the vibration of the vibration member.

[0240] Figure 11 is an example of another embodiment of the vibration layer illustrated in Figure 10 FIG. 1.

[0241] Referring to Figure 11 , the vibration layer 11 according to another embodiment of the disclosure can include a plurality of first portions 11a spaced apart from each other along the first direction X and the second direction Y, and a second portion 11b disposed between the plurality of first portions 11a.

[0242] Each of the plurality of first portions 11a can be disposed to be spaced apart from each other along the first direction X and the second direction Y. For example, each of the plurality of first portions 11a can have a hexahedral shape (or a hexahedron shape) having the same size and can be disposed in a grid shape or a mesh configuration. Each of the plurality of first portions 11a can include a piezoelectric material substantially the same as the first portion 11a described above with reference to Figure 10 FIG. 1, and thus, like reference numerals refer to like elements, and repetitive descriptions thereof can be omitted.

[0243] The second portion 11b can be disposed between the plurality of first portions 11a in each of the first direction X and the second direction Y. The second portion 11b can be configured to fill a gap or a space between two adjacent first portions 11a or to surround each of the plurality of first portions 11a, and thus, can be connected to or attached on the adjacent first portions 11a. According to an embodiment of the disclosure, a width W4 of the second portion 11b disposed between two first portions 11a adjacent to each other in the first direction X can be the same as or different from the width W3 of the first portion 11a, and a width W4 of the second portion 11b disposed between two first portions 11a adjacent to each other in the second direction Y can be the same as or different from the width W3 of the first portion 11a. The second portion 11b can include an organic material substantially the same as the second portion 11b described above with reference to Figure 10 The second portion 11b described above with reference to

[0244] The vibration layer 11 according to another embodiment of the disclosure can include a 1-3 composite structure having a piezoelectric property of a 1-3 vibration mode, and thus, can have a resonance frequency of 30 MHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration layer 11 can vary based on at least one or more of a shape, a length, and a thickness, etc.

[0245] Figure 12 is an example of another embodiment of the vibration portion illustrated in Figure 10 is an example of another embodiment of the vibration portion illustrated in

[0246] Referring to Figure 12 The vibration layer 11 according to another embodiment of the disclosure can include a plurality of first portions 11a spaced apart from each other in the first direction X and the second direction Y and a second portion 11b disposed between the plurality of first portions 11a.

[0247] Each of the plurality of first portions 11a can have a flat structure of a circular shape. For example, each of the plurality of first portions 11a can have a circular plate shape, but embodiments of the disclosure are not limited thereto. For example, each of the plurality of first portions 11a can have a point shape including an oval shape, a polygonal shape, or a circular ring shape. Each of the plurality of first portions 11a can include a piezoelectric material substantially the same as the first portion 11a described above with reference to Figure 10 Each of the plurality of first portions 11a can have a flat structure of a circular shape. For example, each of the plurality of first portions 11a can have a circular plate shape, but embodiments of the disclosure are not limited thereto. For example, each of the plurality of first portions 11a can have a point shape including an oval shape, a polygonal shape, or a circular ring shape. Each of the plurality of first portions 11a can include a piezoelectric material substantially the same as the first portion 11a described above with reference to

[0248] The second portion 11b can be disposed between the plurality of first portions 11a along each of the first direction X and the second direction Y. The second portion 11b can be configured to surround each of the plurality of first portions 11a, and thus, can be connected or attached to a side surface of each of the plurality of first portions 11a. Each of the plurality of first portions 11a and the second portion 11b can be disposed (or arranged) in parallel at the same plane (or the same layer). The second portion 11b can include an organic material substantially the same as the second portion 11b described above with reference to Figure 10 The second portion 11b described above with reference to

[0249] Figure 13 is a perspective view illustrating another embodiment of the vibration portion illustrated in Figure 10

[0250] Referring to Figure 13 According to another embodiment of the present disclosure, the vibration layer 11 can include a plurality of first portions 11a spaced apart from each other along the first direction X and the second direction Y, and a second portion 11b disposed between the plurality of first portions 11a.

[0251] Each of the plurality of first portions 11a can have a flat structure of a triangular shape. For example, each of the plurality of first portions 11a can have a triangular plate shape, but embodiments of the present disclosure are not limited thereto. Each of the plurality of first portions 11a can include a piezoelectric material substantially the same as the first portion 11a described above with reference to Figure 10 The second portion 11b described above with reference to

[0252] According to embodiments of the present disclosure, four adjacent first portions 11a among the plurality of first portions 11a can be adjacent to each other to form a quadrangular shape (or a square shape or a quadrilateral shape). The vertices of the four adjacent first portions 11a forming the quadrangular shape can be adjacent to each other in a central portion (or a center portion) of the quadrangular shape.

[0253] The second portion 11b can be disposed between the plurality of first portions 11a along each of the first direction X and the second direction Y. The second portion 11b can be configured to surround each of the plurality of first portions 11a, and thus, can be connected or attached to a side surface of each of the plurality of first portions 11a. Each of the plurality of first portions 11a and the second portion 11b can be disposed (or arranged) in parallel at the same plane (or the same layer). The second portion 11b can include an organic material substantially the same as the second portion 11b described above with reference to Figure 10 The second portion 11b described above with reference to​

[0254] According to another embodiment of the disclosure, 2N (where N is a natural number greater than or equal to 2) adjacent first portions 11a among the plurality of first portions 11a having a triangular shape can be disposed adjacent to each other to form a 2N-angled shape. For example, six adjacent first portions 11a among the plurality of first portions 11a can be adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). The vertices of the six adjacent first portions 11a forming the hexagonal shape can be adjacent to each other in a central portion (or a center portion) of the hexagonal shape. The second portion 11b can be configured to surround each of the plurality of first portions 11a, and thus can be connected to or attached to a side surface of each of the plurality of first portions 11a. Each of the plurality of first portions 11a and the second portion 11b can be disposed (or arranged) in parallel on the same plane (or the same layer).

[0255] Figure 14 A vibration device according to a fourth embodiment of the disclosure is illustrated. Figure 15 is a cross-sectional view taken along Figure 14 line F-F' illustrated in Figure 16 is a cross-sectional view taken along Figure 14 line G-G' illustrated in Figure 4 is a cross-sectional view taken along Figure 14 line C-C' illustrated in

[0256] Referring to Figure 4 and Figures 14-16 , the vibration device 4 according to the fourth embodiment of the disclosure can include a vibration portion 10, a first cover member 30, a second cover member 50, a contact portion 70, and a signal cable 90.

[0257] The vibration portion 10 can include a first vibration portion 10A and a second vibration portion 10B.

[0258] Each of the first vibration portion 10A and the second vibration portion 10B can be electrically separated and disposed while being spaced apart from each other along the first direction X. Each of the first vibration portion 10A and the second vibration portion 10B can alternately and repeatedly contract and / or expand based on a piezoelectric effect to thereby vibrate. For example, the first vibration portion 10A and the second vibration portion 10B can be disposed or tiled at a certain interval (or distance) D1. Accordingly, the vibration device 4 in which the first vibration portion 10A and the second vibration portion 10B are tiled can be referred to as a vibration array, a vibration array portion, a vibration module array portion, a vibration array structure, a tiled vibration array, a tiled vibration array module, or a tiled array film, but embodiments of the disclosure are not limited thereto.

[0259] Each of the first vibration portion 10A and the second vibration portion 10B according to the embodiment of the present disclosure can have a quadrangular shape. For example, each of the first vibration portion 10A and the second vibration portion 10B can have a quadrangular shape having a width of about 5 cm or more. For example, each of the first vibration portion 10A and the second vibration portion 10B can have a quadrangular shape having a size of 5 cm x 5 cm or more, but the embodiment of the present disclosure is not limited thereto.

[0260] Each of the first vibration portion 10A and the second vibration portion 10B can be disposed or tiled on the same plane, and thus the vibration device 4 can have an enlarged area based on the tiling of the first vibration portion 10A and the second vibration portion 10B having a relatively small size.

[0261] Each of the first vibration portion 10A and the second vibration portion 10B can be disposed or tiled at a certain interval (or distance) D1, and thus can be implemented as one vibration device (or a single vibration device) that is driven as one complete unit rather than being driven separately. According to the embodiment of the present disclosure, the interval (or distance) D1 between the first vibration portion 10A and the second vibration portion 10B can be 0.1 mm or more and less than 3 cm (for example, 1.5 cm) with respect to the first direction X, but the embodiment of the present disclosure is not limited thereto.

[0262] According to the embodiment of the present disclosure, each of the first vibration portion 10A and the second vibration portion 10B can be disposed or tiled to have an interval D1 of 0.1 mm or more and less than 3 cm (for example, 1.5 cm), and thus can be driven as one vibration device, thereby increasing a reproduction band of sound generated based on the unit vibration of the first vibration portion 10A and the second vibration portion 10B and a sound pressure level characteristic of the sound. For example, the first vibration portion 10A and the second vibration portion 10B can be disposed at an interval D1 of 0.1 mm or more and less than 5 mm (for example, 0.25 mm) so as to increase the reproduction band of sound generated based on the unit vibration of the first vibration portion 10A and the second vibration portion 10B and increase sound of a low-pitch sound band (for example, a sound pressure level characteristic of 500 Hz or less). For example, if the first vibration portion 10A and the second vibration portion 10B are spaced too far apart, they can become out of sync, and if the first vibration portion 10A and the second vibration portion 10B are spaced too close together, they can damage each other and cause a rupture.

[0263] According to the embodiment of the present disclosure, when the first vibration portion 10A and the second vibration portion 10B are disposed at an interval D1 of less than 0.1 mm or without the interval D1, the reliability of the first vibration portion 10A and the second vibration portion 10B or the vibration device 4 can decrease due to damage or rupture caused by physical contact therebetween that occurs when each of the first vibration portion 10A and the second vibration portion 10B vibrates.

[0264] According to the embodiment of the present disclosure, when the first vibration part 10A and the second vibration part 10B are disposed at the interval D1 of 3 cm or more, due to independent vibrations of each of the first vibration part 10A and the second vibration part 10B, the first vibration part 10A and the second vibration part 10B cannot be driven as one vibration device. Thus, the reproduction band of sound and the sound pressure level characteristic of sound generated based on the vibrations of the first vibration part 10A and the second vibration part 10B can be reduced. For example, when the first vibration part 10A and the second vibration part 10B are disposed at the interval D1 of 3 cm or more, the sound characteristic and the sound pressure level characteristic of low-pitch sound bands (e.g., 500 Hz or less) can be reduced.

[0265] According to the embodiment of the present disclosure, when the first vibration part 10A and the second vibration part 10B are disposed at the interval D1 of 5 mm, each of the first vibration part 10A and the second vibration part 10B cannot be perfectly driven as one vibration device, and thus the sound characteristic and the sound pressure level characteristic of low-pitch sound bands (e.g., 200 Hz or less) can be reduced.

[0266] According to another embodiment of the present disclosure, when the first vibration part 10A and the second vibration part 10B are disposed at the interval D1 of 1 mm, each of the first vibration part 10A and the second vibration part 10B can be driven as one vibration device, and thus the reproduction band of sound can be increased and the sound of low-pitch sound bands (e.g., 500 Hz or less) can be increased. For example, when the first vibration part 10A and the second vibration part 10B are disposed at the interval D1 of 1 mm, the vibration device 4 can be implemented as a large-area vibrator (e.g., a large speaker) whose area is enlarged based on the optimization of the interval distance between the first vibration part 10A and the second vibration part 10B. Thus, the vibration device 4 can be driven as a large-area vibrator based on the single vibration of the first vibration part 10A and the second vibration part 10B, and thus the sound characteristic and the sound pressure level characteristic in low-pitch sound bands can be increased, and the reproduction band of sound generated based on the large-area vibration of the vibration device 4 can be increased.

[0267] Thus, in order to implement the single vibration (or one vibration device) of the first vibration part 10A and the second vibration part 10B, the interval D1 between the first vibration part 10A and the second vibration part 10B can be adjusted to be 0.1 mm or more and less than 3 cm (e.g., 1.5 cm). In addition, in order to implement the single vibration (or one vibration device) of the first vibration part 10A and the second vibration part 10B and to improve the sound pressure level characteristic of the sound of low-pitch sound bands, the interval D1 between the first vibration part 10A and the second vibration part 10B can be adjusted to be 0.1 mm or more and less than 5 mm (e.g., 2.5 mm).

[0268] Each of the first vibration part 10A and the second vibration part 10B according to the embodiments of the disclosure can include the vibration layer 11, the first electrode layer 13, and the second electrode layer 15. Each of the vibration layer 11, the first electrode layer 13, and the second electrode layer 15 can be configured substantially the same as the vibration layer 11, the first electrode layer 13, and the second electrode layer 15 described above with reference to Figures 1-4 Each of the vibration layer 11, the first electrode layer 13, and the second electrode layer 15 described above can be substantially the same, and thus, similar reference numerals refer to similar elements, and repetitive description thereof can be omitted.

[0269] According to the embodiments of the disclosure, each of the first vibration part 10A and the second vibration part 10B can include any one of the vibration layer 11 described above with reference to Figures 10-13 or can include different vibration layers 11 having different types of configurations.

[0270] The first cover member 30 can be disposed at the first surface of each of the first vibration part 10A and the second vibration part 10B. The first cover member 30 can be configured to cover the first electrode layer 13 of each of the first vibration part 10A and the second vibration part 10B, and can be commonly connected to the first surface of each of the first vibration part 10A and the second vibration part 10B. Accordingly, the first cover member 30 can protect the first surface or the first electrode layer 13 of each of the first vibration part 10A and the second vibration part 10B. For example, in addition to the first cover member 30 being commonly connected to the first surface of each of the first vibration part 10A and the second vibration part 10B as shown in Figure 15 and Figure 16 The first cover member 30 can be substantially the same as the first cover member 30 described above with reference to Figures 1-9 and thus, Figures 1-9 the description (or details) of the first cover member 30 exemplified in Figures 14-16 may be included in the description (or details) of the first cover member 30 exemplified in

[0271] The first cover member 30 can be disposed at the first surface of each of the first vibration part 10A and the second vibration part 10B by the first adhesive layer 41. For example, the first cover member 30 can be disposed at the first surface of each of the first vibration part 10A and the second vibration part 10B by using a film lamination process of the first adhesive layer 41. Accordingly, each of the first vibration part 10A and the second vibration part 10B can be integrated (or disposed) or tiled in the first cover member 30 to have a certain interval (or distance) D1.

[0272] The second cover member 50 can be disposed at the second surface of each of the first vibration part 10A and the second vibration part 10B. For example, the second cover member 50 can be configured to cover the second electrode layer 15 of each of the first vibration part 10A and the second vibration part 10B, and can be commonly connected to the second surface of each of the first vibration part 10A and the second vibration part 10B. Accordingly, the second cover member 50 can protect the second surface or the second electrode layer 15 of each of the first vibration part 10A and the second vibration part 10B. For example, in addition to the second cover member 50 being commonly connected to the second surface of each of the first vibration part 10A and the second vibration part 10B, the second cover member 50 can be substantially the same as the second cover member 50 described above with reference to FIGS. 1 to 3, and thus, the description (or details) of the second cover member 50 described above with reference to FIGS. 1 to 3 can be included in the description (or details) of the second cover member 50 described below with reference to FIG. 4, and the repetitive description thereof can be omitted. Figures 1-9 The second cover member 50 described above with reference to FIGS. 1 to 3 can be substantially the same as the second cover member 50 described below with reference to FIG. 4, and thus, the description (or details) of the second cover member 50 described above with reference to FIGS. 1 to 3 can be included in the description (or details) of the second cover member 50 described below with reference to FIG. 4, and the repetitive description thereof can be omitted. Figures 1-9 The description (or details) of the second cover member 50 exemplified in the above Figures 14-16 The description (or details) of the second cover member 50 exemplified in the above

[0273] The second cover member 50 can be disposed at the second surface of each of the first vibration part 10A and the second vibration part 10B by the second adhesive layer 42. For example, the second cover member 50 can be disposed at the second surface of each of the first vibration part 10A and the second vibration part 10B by a film lamination process using the second adhesive layer 42. Accordingly, each of the first vibration part 10A and the second vibration part 10B can be integrated (or disposed) or tiled on the second cover member 50 to have a certain interval (or distance) D1.

[0274] The contact part 70 can be disposed at one peripheral part EP of the first cover member 30, and can be configured to be electrically connected to each of the first vibration part 10A and the second vibration part 10B. For example, a portion of the contact part 70 can be disposed to overlap or be stacked with each of the first vibration part 10A and the second vibration part 10B.

[0275] The contact part 70 according to an embodiment of the disclosure can include a first contact member 70A and a second contact member 70B.

[0276] The first contact member 70A can be disposed at one peripheral portion EP of the first cover member 30 adjacent to the first vibration portion 10A. The first contact member 70A can be disposed in an island shape at one peripheral portion EP of the first cover member 30 adjacent to the first vibration portion 10A. For example, more specifically, a portion of the first contact member 70A can overlap or stack with a portion of the first vibration portion 10A. For example, a portion of the first contact member 70A can electrically contact a portion of the first vibration portion 10A. For example, a portion of the first contact member 70A can electrically contact the first electrode layer 13 of the first vibration portion 10A. For example, half of the first contact member 70A can directly contact the first electrode layer 13 of the first vibration portion 10A. Another portion of the first contact member 70A can not overlap or stack with the first vibration portion 10A and can be exposed at one peripheral portion of the first cover member 30 (for example, about half of the first contact member 70A can protrude from below the vibration portion 10A, similar to a tap-type structure).

[0277] The second contact member 70B can be disposed at one peripheral portion EP of the first cover member 30 adjacent to the second vibration portion 10B. The second contact member 70B can be disposed in an island shape at one peripheral portion EP of the first cover member 30 adjacent to the second vibration portion 10B. For example, a portion of the second contact member 70B can overlap or stack with a portion of the second vibration portion 10B. For example, more specifically, a portion of the second contact member 70B can electrically contact a portion of the second vibration portion 10B. For example, a portion of the second contact member 70B can electrically contact the first electrode layer 13 of the second vibration portion 10B. For example, half of the second contact member 70B can directly contact the first electrode layer 13 of the second vibration portion 10B. Another portion of the second contact member 70B can not overlap or stack with the second vibration portion 10B and can be exposed at one peripheral portion of the first cover member 30 (for example, about half of the second contact member 70B can protrude from below the vibration portion 10B, similar to a tap-type structure).

[0278] Each of the first contact member 70A and the second contact member 70B can include a conductive double-sided adhesive member. Each of the first contact member 70A and the second contact member 70B can include a conductive double-sided tape, a conductive double-sided adhesive pad, or a conductive double-sided cushion tape, but embodiments of the present disclosure are not limited thereto. As Figure 2 As exemplified in the middle, each of the first contact member 70A and the second contact member 70B can include a metal layer 71, a first adhesive layer 72 (for example, a first adhesive layer), and a second adhesive layer 73 (for example, a second adhesive layer), and thus, repetitive descriptions thereof can be omitted.

[0279] The signal cable 90 can be electrically connected to each of the first and second electrode layers 13 and 15 of each of the first and second vibration parts 10A and 10B at one side of the vibration part 10. An end portion (or a distal end portion) of the signal cable 90 can be disposed at or inserted into a region (or a portion) between one peripheral portion EP of the first cover member 30 and one peripheral portion EP of the second cover member 50. The one peripheral portion EP of the first cover member 30 and the one peripheral portion EP of the second cover member 50 can accommodate a portion of the signal cable 90, or can vertically cover a portion of the signal cable 90.

[0280] The signal cable 90 according to the embodiment of the disclosure can include a base member 91 and first to fourth signal lines 92a to 92d. For example, except that the signal cable 90 includes the first to fourth signal lines 92a to 92d independently connected to each of the first and second electrode layers 13 and 15 of each of the first and second vibration parts 10A and 10B, the signal cable 90 can be substantially the same as the signal cable 90 described above with reference to Figures 1-4 The signal cable 90 described above with reference to

[0281] The base member 91 can include a transparent or non-transparent plastic material. The base member 91 can have a certain width in the first direction X and can extend long along a second direction Y intersecting the first direction X.

[0282] The first signal line 92a can be disposed at the first surface of the base member 91 in parallel with the second direction Y. The first signal line 92a can be electrically connected to or in contact with the first electrode layer 13 of the first vibration part 10A through the first contact member 70A. Except that the first signal line 92a is electrically connected to or in contact with the first electrode layer 13 of the first vibration part 10A through the first contact member 70A, the first signal line 92a can be substantially the same as the first signal line 92a described above with reference to Figures 1-4 The first signal line 92a described above with reference to

[0283] The second signal line 92b can be disposed at the first surface of the base member 91 in parallel with the second direction Y. The second signal line 92b can be electrically connected to or in contact with the second electrode layer 15 of the first vibration part 10A. Except that the second signal line 92b is electrically connected to the second electrode layer 15 of the first vibration part 10A, the second signal line 92b can be substantially the same as the second signal line 92b described above with reference to Figures 1-4 The second signal line 92b described above with reference to

[0284] The third signal line 92c can be provided on the first surface of the base member 91 in parallel with the second direction Y (see FIG. 6, for example). Figure 14 and Figure 16 The third signal line 92c can be electrically connected to or in contact with the first electrode layer 13 of the second vibration portion 10B through the second contact member 70B. The third signal line 92c can be substantially the same as the first signal line 92a except that the third signal line 92c is electrically connected to or in contact with the first electrode layer 13 of the second vibration portion 10B through the second contact member 70B, and thus repeated description thereof can be omitted or will be briefly given below.

[0285] The fourth signal line 92d can be provided on the first surface of the base member 91 in parallel with the second direction Y (see FIG. 6, for example). Figure 14 and Figure 16 The fourth signal line 92d can be provided between the second signal line 92b and the third signal line 92c. The fourth signal line 92d can be electrically connected to or in contact with the second electrode layer 15 of the second vibration portion 10B. The fourth signal line 92d can be substantially the same as the second signal line 92b except that the fourth signal line 92d is electrically connected to the second electrode layer 15 of the second vibration portion 10B, and thus repeated description thereof can be omitted or will be briefly given below.

[0286] The first signal line 92a and the second signal line 92b can have different lengths. For example, the second signal line 92b can extend more from the end of the first signal line 92a. The third signal line 92c and the fourth signal line 92d can have different lengths. For example, the fourth signal line 92d can extend more from the end of the third signal line 92c. Accordingly, the first portion (or intermediate portion) of the base member 91 that overlaps each of the second signal line 92b and the fourth signal line 92d can extend more from the end of each of the first signal line 92a and the third signal line 92c, and thus the base member 91 or the signal cable 90 can include an extension 90a corresponding to the end portion of each of the second signal line 92b and the fourth signal line 92d. Further, the second signal line 92b and the fourth signal line 92d can be provided between the first signal line 92a and the third signal line 92c in a butterfly-shaped configuration symmetrical with respect to the center of the signal cable 90.

[0287] An end portion (or a distal end portion) of the first signal line 92a can be electrically connected to the first contact member 70A of the contact portion 70. For example, the end portion (or the distal end portion) of the first signal line 92a can be directly connected to the first contact member 70A at one peripheral portion EP of the first cover member 30. The first signal line 92a can be attached on or in contact with the first adhesive layer 72 of the first contact member 70A, and thus can be electrically connected to or in contact with the first electrode layer 13 of the first vibrating portion 10A through the first adhesive layer 72 and / or the metal layer 71 of the first contact member 70A. Accordingly, the first signal line 92a can supply the driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the first vibrating portion 10A.

[0288] An end portion (or a distal end portion) of the second signal line 92b can be electrically connected to or in contact with the second electrode layer 15 of the first vibrating portion 10A. For example, the extension 90a of the signal cable 90 can pass through one peripheral portion EP of the second cover member 50, and can be disposed between the second cover member 50 and the first vibrating portion 10A, and the second signal line 92b disposed at the extension 90a can be directly connected to or in contact with the second electrode layer 15 of the first vibrating portion 10A. Accordingly, the second signal line 92b can supply the driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the first vibrating portion 10A.

[0289] An end portion (or a distal end portion) of the third signal line 92c can be electrically connected to the second contact member 70B of the contact portion 70. For example, the end portion (or the distal end portion) of the third signal line 92c can be directly connected to the second contact member 70B at one peripheral portion EP of the first cover member 30. The third signal line 92c can be attached on or in contact with the first adhesive layer 72 of the second contact member 70B, and thus can be electrically connected to or in contact with the first electrode layer 13 of the second vibrating portion 10B through the first adhesive layer 72 and / or the metal layer 71 of the second contact member 70B. Accordingly, the third signal line 92c can supply the driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the second vibrating portion 10B.

[0290] An end portion (or a distal end portion) of the fourth signal line 92d can be electrically connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B. For example, the extension 90a of the signal cable 90 can pass through one peripheral portion EP of the second cover member 50, and can be disposed between the second cover member 50 and the second vibrating portion 10B, and the fourth signal line 92d disposed at the extension 90a can be directly connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B. Accordingly, the fourth signal line 92d can supply the driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the second vibrating portion 10B.

[0291] The signal cable 90 according to the embodiment of the disclosure can further include an insulating layer 93.

[0292] The insulating layer 93 can be disposed at the first surface of the base member 91 to cover each of the first to fourth signal lines 92a to 92d except for the end portion (or distal end portion) of the signal cable 90. The insulating layer 93 can be a protective layer, a cover layer, a cover layer film, a cover film, or a cover insulating film, but embodiments are not limited thereto.

[0293] The end portion (or distal end portion) of the signal cable 90 inserted between the first cover member 30 and the second cover member 50 can be inserted or fixed between the first cover member 30 and the second cover member 50 by using a film lamination process of the first adhesive layer 41 formed in the first cover member 30 and the second adhesive layer 42 formed in the second cover member 50. Accordingly, the first signal line 92a and the third signal line 92c can be stably held in place while being electrically connected to the contact portion 70, and the second signal line 92b and the fourth signal line 92d can be stably held in place while being electrically connected to the second electrode layer 15 of the vibration portion 10. In addition, the end portion (or distal end portion) of the signal cable 90 can be inserted or fixed between the first cover member 30 and the second cover member 50, and thus, a contact defect between the vibration portion 10 and the signal cable 90 caused by movement of the signal cable 90 can be prevented.

[0294] According to the embodiment of the disclosure, a break or damage of the vibration portion 10 occurring in the film lamination process can be prevented or minimized.

[0295] In the vibration device 4 according to the fourth embodiment of the disclosure, a soldering process for electrical connection between the vibration portion 10 and the signal cable 90 can not be required, thereby simplifying a manufacturing process and structure of the vibration device 4, and electrical properties such as resistivity of the first electrode layer 13 and the second electrode layer 15 can be compensated. In addition, the vibration device 4 according to the fourth embodiment of the disclosure can include the first vibration portion 10A and the second vibration portion 10B arranged (or tiled) at a certain interval D1 so as to be implemented as one single vibration body rather than being driven separately, and thus, can be driven as a large-area vibration body based on single vibration of the first vibration portion 10A and the second vibration portion 10B.

[0296] Figure 17 A vibration device according to a fifth embodiment of the disclosure is illustrated. Figure 18 is a cross-sectional view taken along the line H-H' illustrated in Figure 17 is a cross-sectional view taken along the line H-H' illustrated in Figure 17 and Figure 18 A vibration device according to a fifth embodiment of the disclosure is illustrated. Figures 14-16Embodiments in which the contact portion and the signal cable are modified in the described vibration device 4 are implemented. Thus, in the description of Figure 17 and Figure 18 , other elements than the contact portion, the signal cable, and the related elements are referred to by similar reference numerals, and repetitive description thereof can be omitted. For example, the fifth embodiment is similar to the fourth embodiment except that the first signal line 92a and the third signal line 92c can be disposed between the second signal line 92b and the fourth signal line 92d in a butterfly configuration that is symmetric with respect to the center of the signal cable 90. In addition, in the case where the fifth embodiment uses a two-tap structure for the first contact member 70A and the second contact member 70B, the sixth embodiment can use a single contact portion 70.

[0297] Referring to Figure 17 and Figure 18 , in the vibration device 5 according to the fifth embodiment of the present disclosure, the contact portion 70 can be configured in an island shape at one peripheral portion EP of the first cover member 30 to overlap with the first vibration portion 10A and the second vibration portion 10B. For example, the contact portion 70 can collectively overlap or stack with a portion of each of the first vibration portion 10A and the second vibration portion 10B. For example, a portion of the contact portion 70 can electrically contact a portion of each of the first vibration portion 10A and the second vibration portion 10B. For example, a portion of the contact portion 70 can electrically contact the first electrode layer 13 of each of the first vibration portion 10A and the second vibration portion 10B. For example, half of the contact portion 70 can directly contact the first electrode layer 13 of each of the first vibration portion 10A and the second vibration portion 10B. Another portion of the contact portion 70 can not overlap or stack with each of the first vibration portion 10A and the second vibration portion 10B and can be exposed at one peripheral portion of the first cover member 30.

[0298] The signal cable 90 can differ from the signal cable 90 described above with reference to Figures 14-16 in that the first signal line 92a and the third signal line 92c are collectively connected to or in contact with the contact portion 70, and each of the second signal line 92b and the fourth signal line 92d is connected to or in contact with the second electrode layer 15 of each of the first vibration portion 10A and the second vibration portion 10B.

[0299] The first signal line 92a and the third signal line 92c can be arranged in parallel at a middle portion of the first surface of the base member 91. The second signal line 92b and the fourth signal line 92d can be arranged in parallel at two peripheral portions of the first surface of the base member 91. For example, the second signal line 92b and the fourth signal line 92d can be disposed in parallel with the first signal line 92a and the third signal line 92c between the first signal line 92a and the third signal line 92c.

[0300] The two peripheral portions of the base member 91 which overlap the second signal line 92b and the fourth signal line 92d, respectively, can extend more than the end portions of each of the first signal line 92a and the third signal line 92c, and thus, the base member 91 or the signal cable 90 can include a pair of extension portions 90a and 90b corresponding to the end portions of each of the second signal line 92b and the fourth signal line 92d. The pair of extension portions 90a and 90b can extend in the second direction Y with the middle portion of the base member 91 therebetween.

[0301] The end portion (or distal end portion) of each of the first signal line 92a and the third signal line 92c can be electrically connected to the contact portion 70. For example, the end portion (or distal end portion) of each of the first signal line 92a and the third signal line 92c can be directly connected to the contact portion 70 at one peripheral portion EP of the first cover member 30. Each of the first signal line 92a and the third signal line 92c can be attached on or in contact with the first adhesive layer 72 of the contact portion 70, and thus, can be electrically connected to or in contact with the first electrode layer 13 of each of the first vibration portion 10A and the second vibration portion 10B through the first adhesive layer 72 and / or the metal layer 71 of the contact portion 70. Accordingly, each of the first signal line 92a and the third signal line 92c can supply a driving signal supplied from the vibration driving circuit to the first electrode layer 13 of each of the first vibration portion 10A and the second vibration portion 10B.

[0302] Alternatively, each of the first signal line 92a and the third signal line 92c can be commonly connected to the contact portion 70, and the contact portion 70 can be connected to the first electrode layer 13 of each of the first vibration portion 10A and the second vibration portion 10B, and thus, any one of the first signal line 92a and the third signal line 92c can be omitted or combined as a single signal line, thereby reducing the size (or width) of the signal cable 90.

[0303] The end portion (or distal end portion) of the second signal line 92b can be electrically connected to or in contact with the second electrode layer 15 of the first vibration portion 10A. For example, the extension portion (or first extension portion) 90a of the signal cable 90 can pass through one peripheral portion EP of the second cover member 50, and can be disposed between the second cover member 50 and the first vibration portion 10A, and the second signal line 92b disposed at the extension portion (or first extension portion) 90a can be directly connected to or in contact with the second electrode layer 15 of the first vibration portion 10A. Accordingly, the second signal line 92b can supply a driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the first vibration portion 10A.

[0304] An end portion (or a distal end portion) of the fourth signal line 92d can be electrically connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B. For example, the extension (or the second extension) 90b of the signal cable 90 can pass through one of the peripheral portions EP of the second cover member 50, and can be disposed between the second cover member 50 and the second vibrating portion 10B, and the fourth signal line 92d disposed at the extension (or the second extension) 90b can be directly connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B. Accordingly, the fourth signal line 92d can supply the driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the second vibrating portion 10B.

[0305] The vibration device 5 according to the fifth embodiment of the present disclosure can have or provide the same effects as the vibration device 4 according to the fourth embodiment of the present disclosure, and can include one contact portion 70 that commonly contacts the first vibrating portion 10A and the second vibrating portion 10B (rather than having a two-tap structure for the first contact member 70A and the second contact member 70B as in the fourth embodiment), and thus the manufacturing process and structure of the vibration device 5 can be further simplified.

[0306] Figure 19 A vibration device according to a sixth embodiment of the present disclosure is exemplified. Figure 20 is a cross-sectional view taken along Figure 19 line I-I' exemplified in FIG. 1. Figure 19 and Figure 20 An embodiment in which a metal wire is additionally configured in the vibration device described above with reference to Figures 14-16 will be exemplified. Thus, in the description of Figure 19 and Figure 20 , other elements than the metal wire and related elements are referred to by similar reference numerals, and repeated description thereof can be omitted. In Figure 7 a cross-sectional view taken along Figure 19 line E-E' exemplified in FIG. 3. For example, the sixth embodiment is similar to the second embodiment (e.g., FIG. 2) except that the first metal wire 33, the second metal wire 35, the third metal wire 37, and the fourth metal wire 39 are configured to be doubled to provide a butterfly-shaped structure arrangement that is symmetric with respect to the center of the signal cable 90. Figures 5-7

[0307] With reference to Figure 7 , Figure 19 and Figure 20 , the vibration device 6 according to the sixth embodiment of the present disclosure can include the first metal wire 33, the second metal wire 35, the third metal wire 37, and the fourth metal wire 39.

[0308] ​The first metal wire 33 can be provided at the first cover member 30 and can be electrically connected to or in contact with the first electrode layer 13 of the first vibrating portion 10A. For example, the first metal wire 33 can be provided close to the central portion of the first vibrating portion 10A. In addition to the first metal wire 33 being provided at the first cover member 30 to be connected to or in contact with the first electrode layer 13 of the first vibrating portion 10A, the first metal wire 33 can be substantially the same as the first metal wire 33 described above with reference to Figures 5-7 The description (or details) of the first metal wire 33 exemplified in Figures 5-7 may be included in the description (or details) of the first metal wire 33 exemplified in Figure 19 and Figure 20 may omit the repeated description thereof.

[0309] The first metal wire 33 can be electrically connected to or in contact with the first signal line 92a of the signal cable 90 through the first contact member 70A of the contact portion 70 at one peripheral portion EP of the first cover member 30. Accordingly, the first signal line 92a can be electrically connected to or in contact with the first electrode layer 13 of the first vibrating portion 10A through the first contact member 70A of the contact portion 70 and the first metal wire 33, thereby transmitting or supplying the driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the first vibrating portion 10A.

[0310] In the vibration device 6 according to the sixth embodiment of the present disclosure, the first contact member 70A of the contact portion 70 can be disposed or interposed between the first metal wire 33 and the first signal line 92a. The first contact member 70A of the contact portion 70 can be implemented to be electrically connected to or in contact with the first metal wire 33 and the first signal line 92a, and can be spaced apart from the first vibrating portion 10A without electrically contacting the first vibrating portion 10A in one peripheral portion EP of the first cover member 30.

[0311] The second metal wire 35 can be provided between the second electrode layer 15 of the first vibrating portion 10A and the second cover member 50, and can be electrically connected to or in contact with the second electrode layer 15 of the first vibrating portion 10A. For example, the second metal wire 35 can be formed to directly contact the second electrode layer 15 of the first vibrating portion 10A without a medium. For example, the second metal wire 35 can be provided close to the central portion of the first vibrating portion 10A. In addition to the second metal wire 35 being provided at the second electrode layer 15 of the first vibrating portion 10A, the second metal wire 35 can be substantially the same as the second metal wire 35 described above with reference to Figures 5-7 The description (or details) of the second metal wire 35 exemplified in Figures 5-7 may be included in the description (or details) of the second metal wire 35 exemplified in Figure 19 and Figure 20The description (or details) of the second metal line 35 are exemplified in the description of the first metal line 33, and repetitive description thereof can be omitted.

[0312] The third metal line 37 can be provided at the first cover member 30 and can be electrically connected to or in contact with the first electrode layer 13 of the second vibration portion 10B. The third metal line 37 can be provided at the first cover member 30 in parallel to the first metal line 33. For example, the third metal line 37 can be provided close to the central portion of the vibration portion 10. The third metal line 37 can be substantially the same as the first metal line 33 except that the third metal line 37 is provided at the first cover member 30 so as to be connected to or in contact with the first electrode layer 13 of the second vibration portion 10B, and thus, repetitive description thereof can be omitted.

[0313] The third metal line 37 can be electrically connected to or in contact with the third signal line 92c of the signal cable 90 through the second contact member 70B of the contact portion 70 at one peripheral portion EP of the first cover member 30. Accordingly, the third signal line 92c can be electrically connected to or in contact with the first electrode layer 13 of the second vibration portion 10B through the second contact member 70B of the contact portion 70 and the third metal line 37, thereby transmitting or supplying the driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the second vibration portion 10B.

[0314] In the vibration device 6 according to the sixth embodiment of the present disclosure, the second contact member 70B of the contact portion 70 can be provided or interposed between the third metal line 37 and the third signal line 92c. The second contact member 70B of the contact portion 70 can be implemented to be electrically connected to or in contact with the third metal line 37 and the third signal line 92c, and can be spaced apart from the second vibration portion 10B without electrically contacting the second vibration portion 10B in one peripheral portion EP of the first cover member 30.

[0315] The fourth metal line 39 can be provided between the second electrode layer 15 of the second vibration portion 10B and the second cover member 50, and can be electrically connected to or in contact with the second electrode layer 15 of the second vibration portion 10B. The fourth metal line 39 can be provided at the second electrode layer 15 of the second vibration portion 10B in parallel with the second metal line 35. For example, the fourth metal line 39 can be formed to directly contact the second electrode layer 15 of the second vibration portion 10B without a medium. For example, the fourth metal line 39 can be provided close to the central portion of the second vibration portion 10B. Except that the fourth metal line 39 is provided at the second electrode layer 15 of the second vibration portion 10B, the fourth metal line 39 can be substantially the same as the second metal line 35, and thus, a repeated description thereof can be omitted. For example, the second metal line 35 and the fourth metal line 39 can be provided between the first metal line 33 and the third metal line 37, and the second metal line 35 and the fourth metal line 39 can be provided at the top of the corresponding vibration portion, and the first metal line 33 and the third metal line 37 can be provided below the corresponding vibration portion.

[0316] The vibration device 6 according to the sixth embodiment of the present disclosure can have or provide the same effects as the vibration device 4 according to the fourth embodiment of the present disclosure. In the vibration device 6 according to the sixth embodiment of the present disclosure, the driving signal can be supplied to the first electrode layer 13 and the second electrode layer 15 of each of the first vibration portion 10A and the second vibration portion 10B through the metal lines 33, 35, 37, and 39 having a low resistivity, and thus, the electrical properties such as the resistivity of the first electrode layer 13 and the second electrode layer 15 can be supplemented.

[0317] Figure 21 is another cross-sectional view taken along the line I-I' illustrated in Figure 19 Figure 21 is a view for describing a vibration device according to a seventh embodiment of the present disclosure. In Figure 19 is another cross-sectional view taken along the line E-E' illustrated in Figure 9

[0318] Referring to Figure 9 , Figure 20 and Figure 21 , the vibration device 7 according to the seventh embodiment of the present disclosure can be implemented by modifying the second metal line and the fourth metal line in the vibration device 6 described above with reference to Figure 19 and Figure 20 . Thus, in the description of Figure 9 , Figure 20 and Figure 21 , other elements except for the second metal line and the fourth metal line and the related elements are referred to by similar reference numerals, and a repeated description thereof can be omitted.

[0319] ​​The second metal wire 35 can be provided at the second cover member 50 and can be electrically connected to or in contact with the second electrode layer 15 of the first vibrating portion 10A. For example, the second metal wire 35 can extend long from one peripheral portion EP of the second cover member 50 in the second direction Y to overlap the first vibrating portion 10A. The second metal wire 35 can be substantially the same as the second metal wire 35 described above with reference to Figure 5 、 Figure 8 and Figure 9 , and thus, repetitive description thereof can be omitted.

[0320] The fourth metal wire 39 can be provided at the second cover member 50 and can be electrically connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B. For example, the fourth metal wire 39 can extend long from one peripheral portion EP of the second cover member 50 in the second direction Y to overlap the second vibrating portion 10B. The fourth metal wire 39 can be provided at the second cover member 50 in parallel to the second metal wire 35. The fourth metal wire 39 can be substantially the same as the second metal wire 35 except that the fourth metal wire 39 is electrically connected to or in contact with the second electrode layer 15 of the second vibrating portion 10B, and thus, repetitive description thereof can be omitted.

[0321] The second signal line 92b and the fourth signal line 92d of the signal cable 90 can be provided at a second surface of the base member 91 opposite to the first surface. For example, the signal cable 90 can include a double-sided wire structure. The second signal line 92b and the fourth signal line 92d can be covered by the second insulating layer 94 (e.g., see the insulating structure in Figure 9 , which can be applied to the signal lines in Figure 19 ).

[0322] An end portion (or a distal end portion) of the second signal line 92b can be provided or inserted between one peripheral portion EP of the second cover member 50 and the first vibrating portion 10A and can be electrically connected to or in contact with the second metal wire 35. An end portion (or a distal end portion) of the fourth signal line 92d can be provided or inserted between one peripheral portion EP of the second cover member 50 and the second vibrating portion 10B and can be electrically connected to or in contact with the fourth metal wire 39.

[0323] One peripheral portion of the second metal wire 35 provided at one peripheral portion EP of the second cover member 50 can be electrically connected to or in contact with the second signal line 92b of the signal cable 90. The other portion of the second metal wire 35 than the one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the first vibration portion 10A by using a film lamination process of the second adhesive layer 42. For example, the other portion of the second metal wire 35 than the one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the first vibration portion 10A by pressing of the second cover member 50 based on the film lamination process. The second cover member 50 can have flexibility, and thus, can be bent in a curved shape at a stepped portion between the end portion of the second signal line 92b and the second electrode layer 15 of the first vibration portion 10A, whereby the second metal wire 35 can be bent toward the second electrode layer 15 of the first vibration portion 10A as the second cover member 50 is bent.

[0324] One peripheral portion of the fourth metal wire 39 provided at one peripheral portion EP of the second cover member 50 can be electrically connected to or in contact with the fourth signal line 92d of the signal cable 90. The other portion of the fourth metal wire 39 than the one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the second vibration portion 10B by using a film lamination process of the second adhesive layer 42. For example, the other portion of the fourth metal wire 39 than the one peripheral portion can be electrically connected to or in contact with the second electrode layer 15 of the second vibration portion 10B by pressing of the second cover member 50 based on the film lamination process. The second cover member 50 can have flexibility, and thus, can be bent in a curved shape at a stepped portion between the end portion of the fourth signal line 92d and the second electrode layer 15 of the second vibration portion 10B, whereby the fourth metal wire 39 can be bent toward the second electrode layer 15 of the second vibration portion 10B as the second cover member 50 is bent.

[0325] In the vibration device 7 according to the seventh embodiment of the present disclosure, a soldering process for electrical connection between the vibration portion 10 and the signal cable 90 can not be needed, thereby simplifying the manufacturing process and structure of the vibration device 2. In addition, in the vibration device 7 according to the seventh embodiment of the present disclosure, the drive signal can be supplied to the first electrode layer 13 and the second electrode layer 15 of each of the first vibration portion 10A and the second vibration portion 10B through the metal wires 33, 35, 37, and 39 having low electrical resistivity, and thus, the electrical characteristics such as the electrical resistivity of the first electrode layer 13 and the second electrode layer 15 can be supplemented. In addition, in the vibration device 7 according to the seventh embodiment of the present disclosure, the first metal wire 33, the second metal wire 35, the third metal wire 37, and the fourth metal wire 39 can all be disposed in the corresponding cover members 30 and 50 as compared with the vibration device 6 according to the sixth embodiment of the present disclosure, and thus, the manufacturing process can be further simplified. For example, the first metal wire 33, the second metal wire 35, the third metal wire 37, and the fourth metal wire 39 can be disposed outside of the vibration device 7, and the vibration portion and the signal cable can be disposed inside closer to the center of the vibration device.

[0326] Figure 22 A device according to embodiments of the present disclosure is exemplified. Figure 23 is a cross-sectional view taken along the line J-J’ in Figure 22

[0327] Referring to Figure 22 and Figure 23 A device according to embodiments of the present disclosure can include a passive vibration member 100 and one or more vibration generation devices 200.

[0328] A device according to embodiments of the present disclosure can be applied to implement a display device, a sound device, a sound generation device, a soundbar, an analog signboard or a digital signboard, or the like, but embodiments of the present disclosure are not limited thereto.

[0329] ​The display device can include a display panel including a plurality of pixels for implementing a black / white or color image, and a driver for driving the display panel. For example, the display panel can be such a display panel as a liquid crystal display panel, an organic light emitting display panel, a light emitting diode display panel, an electrophoretic display panel, an electro wetting display panel, a micro light emitting diode display panel, or a quantum dot light emitting display panel, but embodiments of the present disclosure are not limited thereto. For example, in the organic light emitting display panel, the pixel can include an organic light emitting device such as an organic light emitting layer, and the pixel can be a sub-pixel implementing any one of a plurality of colors constituting a color image. Accordingly, the device according to an embodiment of the present disclosure can include a set electronic device or a set apparatus (or a set device) such as a notebook computer, a television, a computer monitor, an instrument device including a car device or another type of device for a vehicle, or a mobile electronic device such as a smart phone or an electronic board, which is a complete product (or a final product) including a display panel such as a liquid crystal display panel or an organic light emitting display panel.

[0330] The simulation sign can be an advertising sign, a poster, a placard, a bulletin board, etc. The simulation sign can include sign content such as a sentence, a picture, a banner, and a symbol, etc. The sign content can be disposed at the passive vibration member 100 of the device so as to be visible. For example, the sign content can be directly attached on the passive vibration member 100, and the sign content can be attached on a medium such as paper, etc. by printing, etc., and the medium can be attached on the passive vibration member 100.

[0331] The passive vibration member 100 can vibrate based on driving (or vibration or displacement) of the one or more vibration generating devices 200. For example, the passive vibration member 100 can generate one or more of vibration and sound based on driving of the one or more vibration generating devices 200.

[0332] The passive vibration member 100 according to an embodiment of the present disclosure can be a display panel including a display area (or a screen) including a plurality of pixels implementing a black / white or color image. Accordingly, the passive vibration member 100 can generate one or more of vibration and sound based on driving of the one or more vibration generating devices 200. For example, the passive vibration member 100 can vibrate based on driving of the vibration generating device 200 while displaying an image on the display area, thereby generating or outputting sound synchronized with the image in the display area. Accordingly, the passive vibration member 100 can be a vibrating object, a display member, a display panel, a sign panel, a passive vibration panel, a front cover, a front member, a vibration panel, a sound panel, a passive vibration panel, a sound output panel, a sound vibration panel, or an image screen, etc., but embodiments of the present disclosure are not limited thereto.

[0333] The passive vibration member 100 according to another embodiment of the disclosure can be a vibration plate including a metal material or a non-metal material (or a composite non-metal material) having material characteristics suitable for being vibrated by the one or more vibration generating devices 200 to output sound. For example, the passive vibration member 100 can include a vibration plate including one or more materials among metal, plastic, paper, wood, fiber, cloth, leather, glass, rubber, carbon, and mirror. For example, the paper can be a cone of a speaker. For example, the cone can be paper pulp or foamed plastic or the like, but embodiments of the disclosure are not limited thereto.

[0334] The passive vibration member 100 according to another embodiment of the disclosure can include a display panel including pixels displaying an image, or can include a non-display panel. For example, the passive vibration member 100 can include one or more among a display panel including pixels configured to display an image, a screen panel on which an image is to be projected from a display device, an illumination panel, a signage panel, a vehicle interior material, a vehicle exterior material, a vehicle glass window, a vehicle seat interior material, a building ceiling material, a building interior material, a building glass window, an airplane interior material, an airplane glass window, and a mirror, but embodiments of the disclosure are not limited thereto. For example, the non-display panel can be a light emitting diode illumination panel (or device), an organic light emitting illumination panel (or device), or an inorganic light emitting illumination panel (or device), but embodiments of the disclosure are not limited thereto.

[0335] The one or more vibration generating devices 200 can be configured to vibrate the passive vibration member 100. The one or more vibration generating devices 200 can be configured to be connected to the rear surface 100a of the passive vibration member 100 through the connection member 150. Accordingly, the one or more vibration generating devices 200 can vibrate the passive vibration member 100 to generate or output one or more among vibration and sound based on the vibration of the passive vibration member 100.

[0336] The one or more vibration generating devices 200 can include one or more of the vibration devices 1 to 7 described above with reference to Figures 1-21 Accordingly, the descriptions of the vibration devices 1 to 7 described above with reference to Figures 1-21 may be included in the descriptions of the vibration generating devices 200 exemplified in Figure 22 and Figure 23 , and thus similar reference numerals refer to similar elements and repetitive descriptions thereof can be omitted.

[0337] The connection member 150 can be disposed between the vibration generating device 200 and the passive vibration member 100. The connection member 150 can be disposed between at least a portion of the vibration generating device 200 and the passive vibration member 100. The connection member 150 according to an embodiment of the disclosure can be connected between the passive vibration member 100 and a central portion of the vibration generating device 200 other than the peripheral portion. For example, the connection member 150 can be connected between the passive vibration member 100 and the central portion of the vibration generating device 200 based on a partial attachment type (or a partial bonding method). The central portion (or the center portion) of the vibration generating device 200 can be a center of vibration, and thus the vibration of the vibration generating device 200 can be effectively transmitted to the passive vibration member 100 through the connection member 150. The peripheral portion of the vibration generating device 200 can be spaced apart from each of the connection member 150 and the passive vibration member 100 and be lifted without being connected to the connection member 150 and / or the passive vibration member 100, and thus, in the flexural vibration (or the bending vibration) of the vibration generating device 200, vibration of the peripheral portion of the vibration generating device 200 can be prevented (or reduced) by the connection member 150 and / or the passive vibration member 100, whereby the vibration amplitude (or the displacement amplitude) of the vibration generating device 200 can increase. Accordingly, the vibration amplitude (or the displacement amplitude) of the passive vibration member 100 based on the vibration of the vibration generating device 200 can increase, and thus the sound characteristic and / or the sound pressure level characteristic of the sound generated based on the vibration of the passive vibration member 100 can be further enhanced.

[0338] The connection member 150 according to another embodiment of the disclosure can be attached to or on the entire front surface of each of the one or more vibration generating devices 200 and the rear surface 100a of the passive vibration member 100 based on an entire surface attachment type (or an entire surface bonding method).

[0339] The connection member 150 according to an embodiment of the disclosure can include a material including an adhesive layer having good adhesive force or attachment force with respect to each of the one or more vibration generating devices 200 and the rear surface of the display panel or the rear surface of the passive vibration member 100. For example, the connection member 150 can include a foam pad, a double-sided tape, or an adhesive, etc., but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the connection member 150 can include an epoxy, an acrylic, a silicone, or a polyurethane, but embodiments of the disclosure are not limited thereto. For example, the adhesive layer of the connection member 150 can include an acrylic-based material having relatively greater adhesive force and hardness than a polyurethane-based material. Accordingly, the vibration of the one or more vibration generating devices 200 can be well transmitted to the vibration plate.

[0340] The device according to an embodiment of the disclosure can further include a support member 300 and a coupling member 350.

[0341] The support member 300 can be disposed at the rear surface 100a of the passive vibration member 100. The support member 300 can be disposed at the rear surface 100a of the passive vibration member 100 to cover the one or more vibration generation devices 200. The support member 300 can be disposed on the rear surface 100a of the passive vibration member 100 to cover all of the rear surface 100a of the passive vibration member 100 and the one or more vibration generation devices 200. For example, the support member 300 can have the same size as the passive vibration member 100. For example, the support member 300 can cover the entire rear surface of the passive vibration member 100 with a gap space GS and the one or more vibration generation devices 200 therebetween. The gap space GS can be provided by the coupling member 350 disposed between the passive vibration member 100 and the support member 300 facing each other. The gap space GS can be referred to as an air gap, an accommodation space, a vibration space, or a sound reverberation box, but embodiments of the disclosure are not limited thereto.

[0342] The support member 300 can include any one of a glass material, a metal material, and a plastic material. For example, the support member 300 can include a stacked structure in which one or more of a glass material, a plastic material, and a metal material are stacked.

[0343] Each of the passive vibration member 100 and the support member 300 can have a square or rectangular shape, but embodiments of the disclosure are not limited thereto, and can have a polygonal shape, a non-polygonal shape, a circular shape, or an oval shape. For example, when the device according to an embodiment of the disclosure is applied to a sound device or a soundbar, each of the passive vibration member 100 and the support member 300 can have a rectangular shape in which the length of a long side is twice or more than that of a short side, but embodiments of the disclosure are not limited thereto.

[0344] The coupling member 350 can be configured to be connected between the rear peripheral portion of the passive vibration member 100 and the front peripheral portion of the support member 300, and thus the gap space GS can be disposed between the passive vibration member 100 and the support member 300 facing each other.

[0345] The coupling member 350 according to an embodiment of the disclosure can include an elastic material having adhesive properties and capable of compression and decompression. For example, the coupling member 350 can include a double-sided tape, a single-sided tape, a double-sided foam tape, or a double-sided adhesive foam pad, but embodiments of the disclosure are not limited thereto, and can include such an elastic pad, such as a rubber pad or a silicone pad, having adhesive properties and capable of compression and decompression. For example, the coupling member 350 can be formed of an elastomer.

[0346] According to another embodiment of the present disclosure, the support member 300 can further include a side wall portion supporting a rear peripheral portion of the passive vibration member 100. The side wall portion of the support member 300 can protrude or be bent from the front peripheral portion of the support member 300 toward the rear peripheral portion of the passive vibration member 100, and thus, the gap space GS can be disposed between the passive vibration member 100 and the support member 300. For example, the coupling member 350 can be configured to be connected between the side wall portion of the support member 300 and the rear peripheral portion of the passive vibration member 100. Accordingly, the support member 300 can cover the one or more vibration generation devices 200 and can support the rear surface 100a of the passive vibration member 100. For example, the support member 300 can cover the one or more vibration generation devices 200 and can support the rear peripheral portion of the passive vibration member 100.

[0347] According to another embodiment of the present disclosure, the passive vibration member 100 can further include a side wall portion connected with the front peripheral portion of the support member 300. The side wall portion of the passive vibration member 100 can protrude or be bent from the rear peripheral portion of the passive vibration member 100 toward the front peripheral portion of the support member 300, and thus, the gap space GS can be disposed between the passive vibration member 100 and the support member 300. The rigidity of the passive vibration member 100 can be increased based on the side wall portion. For example, the coupling member 350 can be configured to be connected between the side wall portion of the passive vibration member 100 and the front peripheral portion of the support member 300. Accordingly, the support member 300 can cover the one or more vibration generation devices 200 and can support the rear surface 100a of the passive vibration member 100. For example, the support member 300 can cover the one or more vibration generation devices 200 and can support the rear peripheral portion of the passive vibration member 100.

[0348] The device according to an embodiment of the present disclosure can further include one or more housings 250.

[0349] The housing 250 can be connected or coupled to the rear peripheral portion of the passive vibration member 100 to independently cover the one or more vibration generation devices 200. For example, the housing 250 can be connected or coupled to the rear surface 100a of the passive vibration member 100 through the coupling member 251. The housing 250 can configure a closed space covering or enclosing the vibration device 500 in the rear surface of the support member 300. For example, the housing 250 can configure a closed space covering or enclosing the one or more vibration generation devices 200 in the rear surface 100a of the passive vibration member 100. For example, the housing 250 can be a closing member, a closing cover, a closing box, or a sound box, but embodiments of the present disclosure are not limited thereto. The closed space can be an air gap, a vibration space, a sound space, or a reverberation box, but embodiments of the present disclosure are not limited thereto.

[0350] The housing 250 can include one or more materials among a metallic material and a non-metallic material (or a composite non-metallic material). For example, the housing 250 can include one or more materials among a metallic material, a plastic, and wood, but embodiments of the present disclosure are not limited thereto.

[0351] The housing 250 according to the embodiments of the present disclosure can maintain an impedance component based on air acting on the passive vibration member 100 when the passive vibration member 100 or the one or more vibration generation devices 200 vibrate. For example, air around the passive vibration member 100 can resist vibration of the passive vibration member 100 and can act as an impedance component having a frequency-based reactance component and resistance. Accordingly, the housing 250 can construct an enclosed space surrounding the one or more vibration generation devices 200 in the rear surface 100a of the passive vibration member 100, and thus, can maintain an impedance component (or air impedance or elastic impedance) acting on the passive vibration member 100 based on air, thereby enhancing a sound characteristic and / or a sound pressure level characteristic of a low-pitched sound band and enhancing a quality of a sound of a high-pitched sound band.

[0352] Figure 24 Sound output characteristics of the vibration device according to the first and second embodiments of the present disclosure are exemplified. In Figure 24 In the graph, an abscissa axis (for example, an x-axis) represents a frequency in units of hertz (Hz), and an ordinate axis (for example, a y-axis) represents a sound pressure level (SPL) in units of decibel (dB).

[0353] In the graph, Figure 24 In the graph, a thick solid line represents a sound output characteristic when the electrode layer of the vibration portion includes Ag in the vibration device according to the first embodiment of the present disclosure. A solid line represents a sound output characteristic when the electrode layer of the vibration portion includes carbon and a width of the metal wire is set to 15 mm in the vibration device according to the second embodiment of the present disclosure. A thick dotted line represents a sound output characteristic when the electrode layer of the vibration portion includes carbon and a width of the metal wire is set to 10 mm in the vibration device according to the second embodiment of the present disclosure. A dotted line represents a sound output characteristic when the electrode layer of the vibration portion includes carbon and a width of the metal wire is set to 15 mm in the vibration device according to the second embodiment of the present disclosure. A one-dot chain line represents a sound output characteristic when the electrode layer of the vibration portion includes carbon in the vibration device according to the first embodiment of the present disclosure. The width of the metal wire is not limited to the embodiments of the present disclosure.

[0354] As Figure 24As seen in the graph, in the frequency of 150 Hz to 8 kHz, the bold solid line indicates an average sound pressure level of about 73.87 dB, the solid line indicates an average sound pressure level of about 73.24 dB, the bold dashed line indicates an average sound pressure level of about 73.11 dB, the dashed line indicates an average sound pressure level of about 72.08 dB, and the single-dot chain line indicates an average sound pressure level of about 67.72 dB. Also, in the frequency of 150 Hz to 20 kHz, the bold solid line indicates an average sound pressure level of about 77.46 dB, the solid line indicates an average sound pressure level of about 76.38 dB, the bold dashed line indicates an average sound pressure level of about 75.98 dB, the dashed line indicates an average sound pressure level of about 75.06 dB, and the single-dot chain line indicates an average sound pressure level of about 69.44 dB.

[0355] As Figure 24 As seen in the graph, in the vibration device according to the embodiment of the present disclosure, it can be seen that a sound pressure level of 60 dB or more is achieved in a tone band of 200 Hz or more. Also, compared to the single-dot chain line, it can be seen that the average sound pressure level of each of the solid line and the bold dashed line increases to a level close to the average sound pressure level of the bold solid line.

[0356] Accordingly, although the electrode layer includes carbon which has a high electrical resistivity and a relatively low price, the vibration device according to the embodiment of the present disclosure can output a sound having a sound pressure level of 60 dB or more, and can additionally include a metal wire, thereby outputting a sound having a sound pressure level of 70 dB or more.

[0357] Figure 25 Another sound output characteristic of the vibration device according to the first and second embodiments of the present disclosure is exemplified. In Figure 25 In the graph, the horizontal axis (e.g., x-axis) indicates a frequency in units of hertz (Hz), and the vertical axis (e.g., y-axis) indicates a sound pressure level (SPL) in units of decibel (dB).

[0358] In Figure 25 In the graph, the bold solid line indicates a sound output characteristic when the electrode layer of the vibration portion includes Ag in the vibration device according to the first embodiment of the present disclosure. The solid line indicates a sound output characteristic when the electrode layer of the vibration portion includes carbon and a metal wire is disposed at the central portion of the vibration portion in the vibration device according to the second embodiment of the present disclosure. The dashed line indicates a sound output characteristic when the electrode layer of the vibration portion includes carbon and a metal wire is disposed at the peripheral portion of the vibration portion in the vibration device according to the second embodiment of the present disclosure. The single-dot chain line indicates a sound output characteristic when the electrode layer of the vibration portion includes carbon in the vibration device according to the first embodiment of the present disclosure.

[0359] As Figure 25As seen in the graph, in the frequency of 150 Hz to 8 kHz, the bold solid line indicates an average sound pressure level of about 73.87 dB, the solid line indicates an average sound pressure level of about 72.93 dB, the dotted line indicates an average sound pressure level of about 72.85 dB, and the single-dot chain line indicates an average sound pressure level of about 67.72 dB. Also, in the frequency of 150 Hz to 20 kHz, the bold solid line indicates an average sound pressure level of about 77.46 dB, the solid line indicates an average sound pressure level of about 76.20 dB, the dotted line indicates an average sound pressure level of about 75.35 dB, and the single-dot chain line indicates an average sound pressure level of about 69.44 dB.

[0360] As Figure 25 As seen in the graph, in the vibration device according to the embodiment of the disclosure, it can be seen that a sound pressure level of 60 dB or more is achieved in a tone sound band of 200 Hz or more. Also, compared to the single-dot chain line, it can be seen that the average sound pressure level of each of the solid line and the bold dotted line increases to a level close to the average sound pressure level of the bold solid line. Also, as in the solid line and the dotted line, it can be seen that the sound pressure level of a high tone sound band increases as the metal wire gets closer from the peripheral portion of the vibration portion to the central portion of the vibration portion.

[0361] Accordingly, although the electrode layer includes carbon which has a high electrical resistivity and a relatively low price, the vibration device according to the embodiment of the disclosure can output a sound having a sound pressure level of 60 dB or more, and can additionally include a metal wire, thereby outputting a sound having a sound pressure level of 70 dB or more.

[0362] Hereinafter, a vibration device according to an embodiment of the disclosure and a device including the same will be described.

[0363] A vibration device according to some embodiments of the disclosure can include a first cover member, a second cover member, a vibration portion between the first cover member and the second cover member, a contact portion between the first cover member and the vibration portion, and a signal cable including a first signal line connected to a first surface of the vibration portion and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

[0364] According to some embodiments of the disclosure, the vibration portion can include a first electrode layer, a second electrode layer, and a vibration layer between the first electrode layer and the second electrode layer, the vibration layer including a piezoelectric material, the first signal line configured to be electrically connected to the first electrode layer through the contact portion, and the second signal line configured to be electrically connected to the second electrode layer.

[0365] According to some embodiments of the disclosure, a first portion of the contact portion can overlap a portion of the first electrode layer.

[0366] According to some embodiments of the present disclosure, a first portion of the contact portion can be connected to a portion of the first electrode layer, and a second portion of the contact portion can be connected to the first signal line.

[0367] According to some embodiments of the present disclosure, the first signal line can be connected to the contact portion, and the second signal line can be connected to the second electrode layer.

[0368] According to some embodiments of the present disclosure, the vibration device can further include a first metal wire disposed on the first cover member, the first metal wire being connected to the first electrode layer, and a second metal wire disposed on the second electrode layer, the first signal line can be electrically connected to the first metal wire through the contact portion, and the second signal line can be connected to the second metal wire.

[0369] According to some embodiments of the present disclosure, the vibration device can further include a first metal wire at the first cover member, the first metal wire being connected to the first electrode layer, and a second metal wire at the second cover member, the second metal wire being connected to the second electrode layer, the first signal line can be electrically connected to the first metal wire through the contact portion, and the second signal line can be connected to the second metal wire.

[0370] According to some embodiments of the present disclosure, the vibration portion can include a first vibration portion and a second vibration portion disposed in parallel to the first vibration portion, and the signal cable can further include a third signal line electrically connected to a first surface of the second vibration portion through the contact portion, and a fourth signal line connected to a second surface of the second vibration portion opposite the first surface of the second vibration portion, the first signal line can be electrically connected to a first surface of the first vibration portion through the contact portion, and the second signal line can be electrically connected to a second surface of the first vibration portion opposite the first surface of the first vibration portion.

[0371] According to some embodiments of the present disclosure, each of the first vibration portion and the second vibration portion can include a vibration layer including a piezoelectric material, a first electrode layer at a first surface of the vibration layer, and a second electrode layer at a second surface of the vibration layer opposite the first surface.

[0372] According to some embodiments of the present disclosure, the first signal line can be configured to be electrically connected to the first electrode layer of the first vibration portion through the contact portion, the second signal line can be configured to be electrically connected to the second electrode layer of the first vibration portion, the third signal line can be configured to be electrically connected to the first electrode layer of the second vibration portion through the contact portion, and the fourth signal line can be configured to be electrically connected to the second electrode layer of the second vibration portion.

[0373] According to some embodiments of the present disclosure, the contact portion can include a first contact member connecting the first signal line to the first electrode layer of the first vibration portion and a second contact member connecting the third signal line to the first electrode layer of the second vibration portion, and the first contact member can be spaced apart from the second contact member.

[0374] According to some embodiments of the present disclosure, a portion of the first contact member can overlap the first electrode layer of the first vibration portion, and a portion of the second contact member can overlap the first electrode layer of the second vibration portion.

[0375] According to some embodiments of the present disclosure, the first contact member can be connected to both the first electrode layer of the first vibration portion and the first signal line, and the second contact member can be connected to both the first electrode layer of the second vibration portion and the third signal line.

[0376] According to some embodiments of the present disclosure, the contact portion can be commonly connected to both the first electrode layer of the first vibration portion and the first electrode layer of the second vibration portion.

[0377] According to some embodiments of the present disclosure, the first signal line and the third signal line can be commonly connected to the contact portion.

[0378] According to some embodiments of the present disclosure, the vibration device can further include a first metal line at the first cover member connected to the first electrode layer of the first vibration portion, a second metal line at the second electrode layer of the first vibration portion, a third metal line at the first cover member connected to the first electrode layer of the second vibration portion, and a fourth metal line at the second electrode layer of the second vibration portion.

[0379] According to some embodiments of the present disclosure, the contact portion can include a first contact member connected to both the first signal line and the first metal line, and a second contact member connected to both the third signal line and the third metal line, the second signal line can be connected to the second metal line, the fourth signal line can be connected to the fourth metal line, and the first contact member can be spaced apart from the second contact member.

[0380] According to some embodiments of the present disclosure, the vibration device can further include a first metal line at the first cover member connected to the first electrode layer of the first vibration portion through the contact portion, a second metal line at the second cover member connected to the second electrode layer of the first vibration portion, a third metal line at the first cover member connected to the first electrode layer of the second vibration portion through the contact portion, and a fourth metal line at the second cover member connected to the second electrode layer of the second vibration portion.

[0381] According to some embodiments of the present disclosure, the contact portion can include a conductive double-coated adhesive member including a metal layer, a first adhesive layer, and a second adhesive layer.

[0382] According to some embodiments of the present disclosure, the first metal wire and the second metal wire can include silver or copper.

[0383] According to some embodiments of the present disclosure, the vibration layer can include a plurality of first portions including an inorganic material including a piezoelectric material, and a plurality of second portions located between adjacent first portions, and the plurality of second portions can include an organic material.

[0384] According to some embodiments of the present disclosure, the plurality of first portions and the plurality of second portions can be alternately and repeatedly arranged in an edge direction of the vibration layer, a widest second portion of the plurality of second portions can be disposed at a central portion of the vibration layer, and a thinnest second portion of the plurality of second portions can be disposed at an outer edge of the vibration layer.

[0385] According to some embodiments of the present disclosure, the first vibration portion can be spaced apart from the second vibration portion by a distance of about 0.1 mm to 5 mm.

[0386] An apparatus according to some embodiments of the present disclosure can include a passive vibration member and a vibration generation apparatus connected to the passive vibration member to vibrate the passive vibration member, the vibration generation apparatus can include a vibration apparatus (for example, as described above), and the vibration apparatus can include a first cover member, a second cover member, a vibration portion between the first cover member and the second cover member, a contact portion between the first cover member and the vibration portion, and a signal cable including a first signal line connected to a first surface of the vibration portion and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion.

[0387] According to some embodiments of the present disclosure, the contact portion can include a conductive double-coated adhesive member including a metal layer, a first adhesive layer, and a second adhesive layer.

[0388] According to some embodiments of the present disclosure, the apparatus can further include a housing disposed at a rear surface of the passive vibration member to cover the vibration generation apparatus.

[0389] According to some embodiments of the present disclosure, the passive vibration member can include one or more of metal, plastic, wood, paper, fiber, cloth, leather, glass, rubber, carbon, and mirror.

[0390] According to some embodiments of the disclosure, the passive vibrating member can include one or more of: a display panel including pixels configured to display an image, a screen panel onto which an image is to be projected from a display device, a light emitting diode lighting panel, an organic light emitting lighting panel, an inorganic light emitting lighting panel, a signage panel, a vehicle interior material, a vehicle exterior material, a vehicle glazing, a vehicle seat interior material, a building ceiling material, a building interior material, a building glazing, an aircraft interior material, an aircraft glazing, and a mirror.

[0391] A vibrating device according to embodiments of the disclosure can include a vibrating portion including a first electrode layer, a second electrode layer, and a vibrating layer disposed between the first electrode layer and the second electrode layer, a contact portion including a conductive material, and a signal cable including a first signal line electrically connected to the first electrode layer of the vibrating portion, and a second signal line electrically connected to the second electrode layer of the vibrating portion, the vibrating portion can be disposed between the second signal line of the signal cable and the contact portion.

[0392] According to some embodiments of the disclosure, a portion of the second signal line can extend beyond an end of the first signal line, and the portion of the second signal line can overlap the vibrating portion, and the first signal line cannot overlap the vibrating portion.

[0393] According to some embodiments of the disclosure, the vibrating device can further include a first metal wire disposed between the second electrode layer of the vibrating portion and the second signal line, and a second metal wire connected to the first electrode layer of the vibrating portion and the contact portion, the contact portion can be disposed between the second metal wire and the first signal line.

[0394] According to some embodiments of the disclosure, the first metal wire and the second metal wire can extend beyond half of a length of the vibrating portion.

[0395] According to some embodiments of the disclosure, the vibrating device can further include a first cover member and a second cover member, the vibrating portion, the contact portion, and the signal cable can be disposed between the first cover member and the second cover member, the first metal wire can contact the first cover member, and the second metal wire can contact the second cover member.

[0396] According to some embodiments of the disclosure, the contact portion can contact the first cover member.

[0397] According to some embodiments of the disclosure, the vibrating device can further include a first cover member and a second cover member, the vibrating portion, the contact portion, and the signal cable can be disposed between the first cover member and the second cover member.

[0398] According to some embodiments of the disclosure, the contact portion can contact the first cover member.

[0399] The vibration device or vibration generating device according to embodiments of the disclosure can be applied to a vibration device or vibration generating device disposed at a device. The device according to embodiments of the disclosure can be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, a rollable device, a bendable device, a flexible device, a curved device, a sliding device, a variable device, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA), an MP3 player, a mobile medical device, a desktop personal computer (PC), a laptop PC, a netbook computer, a workstation, a navigation device, a car navigation device, a car display device, a car device, a theater device, a theater display device, a TV, a wallpaper display device, a signage device, a game console, a notebook computer, a monitor, a camera, a camcorder, and a home appliance, etc. In addition, the vibration device or vibration generating device according to some embodiments of the disclosure can be applied to an organic light emitting illumination device or an inorganic light emitting illumination device. When the vibration device or vibration generating device of the embodiments of the disclosure is applied to an illumination device, the illumination device can be used as an illumination and a speaker. In addition, when the vibration device or vibration generating device according to some embodiments of the disclosure is applied to a mobile device or the like, the vibration device or vibration generating device can be one or more of a speaker, a receiver, and a haptic device, but embodiments of the disclosure are not limited thereto.

[0400] It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the technical idea or scope of the disclosure. Thus, it is intended that the present disclosure cover the modification and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.

[0401] The following features can be generally applicable, i.e. to one or more or all embodiments of the present technology.

[0402] According to the present disclosure, at least a portion of the contact portion 70 or the contact portion 70 is relatively thinner than the first signal line 92a, which is overlapped or inserted or disposed between the first electrode layer 13 of the vibration portion 10 and the first cover member 30. In other words, the height or thickness of the contact portion 70 or the portion of the contact portion 70 is less than that of the first signal line 92a.

[0403] Similarly, optionally, at least a portion of the first metal line 33 or the first metal line 33 is relatively thinner than the first signal line 92a, which is overlapped or inserted or disposed between the first electrode layer 13 of the vibration portion 10 and the first cover member 30. In other words, the height or thickness of the first metal line 33 or the portion of the first metal line is less than that of the first signal line 92a.

[0404] Similarly, optionally, at least a portion of the (common) contact portion 70 or the first contact member 70A or the contact portion 70 or the first contact member 70A that is overlapped or inserted or disposed between the first electrode layer 13 and the first cover member 30 of the first vibration portion 10A is relatively thinner than the first signal line 92a. In other words, a height or a thickness of the (common) contact portion 70 or the first contact member 70A or at least a portion of the contact portion 70 or the first contact member 70A is smaller than a height or a thickness of the first signal line 92a.

[0405] Similarly, optionally, at least a portion of the first metal line 33 or the first metal line 33 that is overlapped or inserted or disposed between the first electrode layer 13 and the first cover member 30 of the first vibration portion 10A is relatively thinner than the first signal line 92a. In other words, a height or a thickness of the first metal line 33 or at least a portion of the first metal line 33 is smaller than a height or a thickness of the first signal line 92a.

[0406] Similarly, optionally, at least a portion of the (common) contact portion 70 or the second contact member 70B or the contact portion 70 or the second contact member 70B that is overlapped or inserted or disposed between the first electrode layer 13 and the first cover member 30 of the second vibration portion 10B is relatively thinner than the third signal line 92c. In other words, a height or a thickness of the (common) contact portion 70 or the second contact member 70B or at least a portion of the contact portion 70 or the second contact member 70B is smaller than a height or a thickness of the third signal line 92c.

[0407] Similarly, optionally, at least a portion of the third metal line 37 or the third metal line 37 that is overlapped or inserted or disposed between the first electrode layer 13 and the first cover member 30 of the second vibration portion 10B is relatively thinner than the third signal line 92c. In other words, a height or a thickness of the third metal line 37 or at least a portion of the third metal line 37 is smaller than a height or a thickness of the third signal line 92c.

[0408] Further, optionally, according to the present disclosure, at least a portion of the second metal line 35 or the second metal line 35 that is overlapped or inserted or disposed between the second electrode layer 15 and the second cover member 50 of the vibration portion 10 or the first vibration portion 10A is relatively thinner than the second signal line 92b. In other words, a height or a thickness of the second metal line 35 or at least a portion of the second metal line is smaller than a height or a thickness of the second signal line 92b.

[0409] Similarly, according to the present disclosure, at least a portion of the fourth metal line 39 or the fourth metal line 39 that is overlapped or inserted or disposed between the second electrode layer 15 and the second cover member 50 of the second vibration portion 10B is relatively thinner than the fourth signal line 92d. In other words, a height or a thickness of the fourth metal line 39 or at least a portion of the fourth metal line 39 is smaller than a height or a thickness of the fourth signal line 92d.

[0410] As described above, the height or thickness can be measured in the (vertical) direction extending from the first cover member 30 to the second cover member 50, and vice versa.

[0411] Cross Reference to Related Applications

[0412] This application claims the benefit of and priority to Korean Patent Application No. 10-2021-0194790, filed December 31, 2021, the entire contents of which are incorporated herein by reference.

Claims

1. A vibration device, the vibration device comprising: a first cover member; a second cover member; a vibration portion between the first cover member and the second cover member; a contact portion between the first cover member and the vibration portion; and a signal cable, the signal cable comprising: a first signal line connected to a first surface of the vibration portion via the contact portion; and a second signal line connected to a second surface of the vibration portion opposite the first surface of the vibration portion, wherein the contact portion comprises a conductive double-sided adhesive member, the conductive double-sided adhesive member comprising a metal layer, a first adhesive layer, and a second adhesive layer. the vibration portion comprising:

2. The vibration apparatus according to claim 1, wherein a first electrode layer; a second electrode layer; and a vibration layer between the first electrode layer and the second electrode layer, the vibration layer comprising a piezoelectric material, wherein the first signal line is electrically connected to the first electrode layer through the contact portion, and wherein the second signal line is electrically connected to the second electrode layer. a first portion of the contact portion overlaps a portion of the first electrode layer.

3. The vibration apparatus according to claim 2, wherein 4. The vibration device of claim 2, a first portion of the contact portion is connected to a portion of the first electrode layer, and wherein wherein a second portion of the contact portion is connected to the first signal line.

5. The vibration device of claim 2, the first signal line is connected to the contact portion, and wherein, wherein the second signal line is connected to the second electrode layer.

6. The vibration device of claim 2, further comprising: a first metal line disposed on the first cover member, the first metal line connected to the first electrode layer; and a second metal line disposed on the second electrode layer, wherein the first signal line is electrically connected to the first metal line through the contact portion, and wherein the second signal line is electrically connected to the second metal line.

7. The vibration device of claim 2, further comprising: a first metal line at the first cover member, the first metal line connected to the first electrode layer, and a second metal line at the second cover member, the second metal line connected to the second electrode layer, wherein the first signal line is electrically connected to the first metal line through the contact portion, and wherein the second signal line is electrically connected to the second metal line.

8. The vibration device of claim 1, wherein: the vibration portion comprises a first vibration portion and a second vibration portion disposed parallel to the first vibration portion, the signal cable further comprises a third signal line electrically connected to a first surface of the second vibration portion through the contact portion and a fourth signal line connected to a second surface of the second vibration portion opposite the first surface of the second vibration portion, the first signal line is electrically connected to a first surface of the first vibration portion through the contact portion, and the second signal line is electrically connected to a second surface of the first vibration portion opposite the first surface of the first vibration portion. ​ ​ 9. The vibration apparatus according to claim 8, wherein Each of the first and second vibration portions includes: a vibration layer including a piezoelectric material; a first electrode layer at a first surface of the vibration layer; and a second electrode layer at a second surface of the vibration layer opposite the first surface.

10. The vibration device of claim 9, wherein: the first signal line is electrically connected to the first electrode layer of the first vibration portion through the contact portion, the second signal line is electrically connected to the second electrode layer of the first vibration portion, the third signal line is electrically connected to the first electrode layer of the second vibration portion through the contact portion, and the fourth signal line is electrically connected to the second electrode layer of the second vibration portion.

11. The vibration apparatus according to claim 9, wherein the contact portion includes: a first contact member connecting the first signal line to the first electrode layer of the first vibration portion; and a second contact member connecting the third signal line to the first electrode layer of the second vibration portion, wherein the first contact member is spaced apart from the second contact member.

12. The vibration device of claim 11, wherein, a portion of the first contact member overlaps the first electrode layer of the first vibration portion, and wherein a portion of the second contact member overlaps the first electrode layer of the second vibration portion.

13. The vibration device of claim 11, wherein the first contact member is connected to both the first electrode layer of the first vibration portion and the first signal line, and wherein the second contact member is connected to both the first electrode layer of the second vibration portion and the third signal line.

14. The vibratory apparatus of claim 9, wherein, the contact portion is commonly connected to both the first electrode layer of the first vibration portion and the first electrode layer of the second vibration portion.

15. The vibratory apparatus of claim 14, wherein, both the first signal line and the third signal line are commonly connected to the contact portion.

16. The vibration device of claim 9, further comprising: a first metal line at the first cover member, the first metal line connected to the first electrode layer of the first vibration portion; a second metal line at the second electrode layer of the first vibration portion; a third metal line at the first cover member, the third metal line connected to the first electrode layer of the second vibration portion; and a fourth metal line at the second electrode layer of the second vibration portion. the contact portion includes:

17. The vibratory apparatus of claim 16, wherein, a first contact member connected to both the first signal line and the first metal line; and a second contact member connected to both the third signal line and the third metal line, wherein the second signal line is connected to the second metal line, wherein the fourth signal line is connected to the fourth metal line, and wherein the first contact member is spaced apart from the second contact member.

18. The vibration device of claim 9, further comprising: ​ a first metal wire at the first cover member, the first metal wire connected to the first electrode layer of the first vibration part; a second metal wire at the second cover member, the second metal wire connected to the second electrode layer of the first vibration part; a third metal wire at the first cover member, the third metal wire connected to the first electrode layer of the second vibration part; and a fourth metal wire at the second cover member, the fourth metal wire connected to the second electrode layer of the second vibration part. The first metal wire and the second metal wire include silver or copper.

19. The vibratory apparatus of any one of claims 6-7, 16, or 18, wherein, The first electrode layer contacts a thinner portion of the contact portion than the first signal wire.

20. The vibration apparatus according to claim 3 or 12, wherein The vibration layer includes a plurality of first portions and a plurality of second portions between adjacent first portions, and 21. The vibration apparatus according to claim 2 or 9, wherein wherein the plurality of first portions include an inorganic material including a piezoelectric material, and the plurality of second portions include an organic material. The plurality of first portions and the plurality of second portions are alternately and repeatedly arranged in an edge direction of the vibration layer, 22. The vibratory apparatus of claim 21, wherein, wherein a widest second portion of the plurality of second portions is disposed at a central portion of the vibration layer, and wherein a thinnest second portion of the plurality of second portions is disposed at an outer edge of the vibration layer. The first vibration part is spaced apart from the second vibration part by a distance of 0.1 mm to 5 mm.

23. The vibratory apparatus of claim 8, wherein, 24. An apparatus for generating vibration or sound, the apparatus comprising: a passive vibration member; and a vibration generation apparatus connected to the passive vibration member to vibrate the passive vibration member, wherein the vibration generation apparatus includes the vibration apparatus according to any one of claims 1 to 18.

25. The apparatus of claim 24, further comprising a housing disposed at a rear surface of the passive vibration member to cover the vibration generation apparatus. The passive vibration member includes one or more of metal, plastic, wood, paper, fiber, cloth, leather, glass, rubber, carbon, and a mirror.

26. The apparatus of claim 24, wherein, The passive vibration member includes one or more of: a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display apparatus, a light emitting diode lighting panel, an organic light emitting lighting panel, an inorganic light emitting lighting panel, a signage panel, a vehicle interior material, a vehicle exterior material, a vehicle glazing, a vehicle seat interior material, a building ceiling material, a building interior material, a building glazing, an aircraft interior material, an aircraft glazing, and a mirror.

27. The apparatus of claim 24, wherein, 28. A vibration apparatus, the vibration apparatus comprising: a vibration part including a first electrode layer, a second electrode layer, and a vibration layer disposed between the first electrode layer and the second electrode layer; a contact portion including an electrically conductive material; and a signal cable including: a first signal wire electrically connected to the first electrode layer of the vibration part; and a second signal wire electrically connected to the second electrode layer of the vibration part, ​ The vibration portion is disposed between the second signal line of the signal cable and the contact portion, and The contact portion includes a conductive double-sided adhesive member including a metal layer, a first adhesive layer, and a second adhesive layer.

29. The vibratory apparatus of claim 28, wherein, A portion of the second signal line extends beyond an end of the first signal line, and the portion of the second signal line overlaps the vibration portion, and The first signal line does not overlap the vibration portion.

30. The vibration device of claim 28, further comprising: a first metal line disposed between the second electrode layer of the vibration portion and the second signal line; and a second metal line connected to the first electrode layer of the vibration portion and the contact portion, wherein the contact portion is disposed between the second metal line and the first signal line.

31. The vibratory apparatus of claim 30, wherein, The first metal line and the second metal line extend more than half the length of the vibration portion.

32. The vibration device of claim 30, further comprising: a first cover member; and a second cover member, wherein the vibration portion, the contact portion, and the signal cable are disposed between the first cover member and the second cover member, and wherein the first metal line contacts the first cover member and the second metal line contacts the second cover member.

33. The vibratory apparatus of claim 32, wherein, The contact portion contacts the first cover member.

34. The vibration device of claim 28, further comprising: a first cover member; and a second cover member, wherein the vibration portion, the contact portion, and the signal cable are disposed between the first cover member and the second cover member.

35. The vibratory apparatus of claim 34, wherein, The contact portion contacts the first cover member.

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