Vibration device and device including same

Abstract

To provide a vibration apparatus and an apparatus including the vibration apparatus which simplify a manufacturing process and a structure.SOLUTION: A vibration apparatus 10 includes: a vibration generating portion including a first vibration portion 10A and a second vibration portion 10B overlapping the first vibration portion; a first cover member 30 at a first surface of the vibration generating portion; a second cover member 50 at a second surface opposite to the first surface of the vibration generating portion; and a signal cable 90 including first to third signal lines 92a-92c connected to the first vibration portion 10A and the second vibration portion 10B and disposed between the first cover member 30 and the second cover member 50.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This specification relates to a vibration device and a device including the same.

Background Art

[0002] In recent years, there has been an increasing demand for slimming and thinning of electronic devices. Speakers applied to electronic devices and the like are also attracting attention to a piezoelectric element method that can achieve a thin thickness instead of a voice coil method in response to the demand for slimming and thinning.

[0003] A speaker or a vibration device applying a piezoelectric element can be driven or vibrated by receiving a driving power source or a driving signal from a signal cable.

[0004] A vibration device (or a film actuator) includes a film having wiring for applying a driving power source to a piezoelectric element and pad electrodes. In order to manufacture such a vibration device, processes such as patterning the wiring and pad electrodes on the film and soldering for electrically connecting the pad electrodes and the signal cable are required.

[0005] The description provided in the background art should not be regarded as prior art merely because it is mentioned in or related to the background art. Discussions of the prior art can include information explaining one or more examples of the present technology, and the description of the background art does not limit the invention of this specification.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The inventors of the present specification, in addition to the problems and disadvantages of the background art, recognized the above problems and conducted various studies and experiments to realize a vibration device capable of simplifying the structure and manufacturing process of the vibration device. As a result of conducting various studies and experiments, they invented a vibration device with a new structure and a device including the same that can simplify the structure and manufacturing process of the vibration device.

[0007] The problem to be solved according to one or more embodiments of the present specification is to provide a vibration device and a device including the same that can simplify the structure and manufacturing process.

[0008] The problem to be solved according to one or more embodiments of the present specification is to provide a vibration device and a device including the same in which the sound pressure characteristics of sound are improved.

[0009] The problem to be solved according to one or more embodiments of the present specification is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those of ordinary skill in the technical field to which the technical idea of the present specification belongs from the following description.

Means for Solving the Problems

[0010] Additional features, advantages, and examples of the present specification are partially described in the following description, partially become clear from the present specification, and can also be learned from the examples of the inventive concept provided therefrom. Other features, advantages, and examples of the inventive concept are realized, achieved, and can be achieved not only by the description, claims provided in or derived from the present specification, but also by the accompanying drawings.

[0011] The vibration device according to one embodiment of the present specification includes a vibration generating unit including a first vibration unit and a second vibration unit superimposed on the first vibration unit, a first cover member on the first surface of the vibration generating unit, a second cover member on the second surface opposite to the first surface of the vibration generating unit, and a signal cable having first to third signal lines connected to the first vibration unit and the second vibration unit between the first cover member and the second cover member.

[0012] An apparatus according to an embodiment of the present specification includes a passive vibration member and a vibration generating device having a vibration device connected to the passive vibration member to vibrate the passive vibration member. The vibration generating device includes a vibration generating unit including a first vibration unit and a second vibration unit superimposed on the first vibration unit, a first cover member on a first surface of the vibration generating unit, a second cover member on a second surface opposite to the first surface of the vibration generating unit, and a signal cable having first to third signal lines connected to the first vibration unit and the second vibration unit between the first cover member and the second cover member.

Advantages of the Invention

[0013] According to an embodiment of the present specification, it is possible to provide a vibration device capable of simplifying the structure and manufacturing process, and an apparatus including the same.

[0014] According to an embodiment of the present specification, it is possible to provide a vibration device and an apparatus including the same in which a decrease in acoustic characteristics can be minimized even when using an electrode with a high specific resistance.

[0015] Other systems, methods, features, and advantages will be apparent or obvious to those skilled in the art upon examination of the following drawings and detailed description. All of these additional systems, methods, features, and advantages are included in this description, are within the scope of the present disclosure, and are intended to be protected by the following claims. Nothing in this section shall be construed as a limitation on these claims. Additional aspects and advantages will be discussed below in conjunction with aspects of the present disclosure.

[0016] Both the foregoing description and the following detailed description of the present specification are exemplary and explanatory and are to be understood as providing further explanation of the disclosure set forth in the claims.

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this application, illustrate aspects and embodiments of the present invention and, together with the description, can serve to explain the principles of the present invention.

Brief Description of the Drawings

[0018]

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[0019] Unless otherwise specified throughout the drawings and the detailed description, the same reference numerals should be understood to refer to the same components, features, and structures. The relative sizes and depictions of these elements may be exaggerated for clarity, explanation, and convenience.

Mode for Carrying Out the Invention

[0020] Refer to the embodiments of this specification in detail, and the examples can be illustrated in the accompanying drawings. In the following description, if the specific description of well-known functions or configurations obscures the gist of this specification unnecessarily, the specific description can be omitted for the sake of brevity. The described steps and / or progress of operations are exemplary, but the order of steps and / or operations is not limited to those described in this specification and can be changed except for steps and / or operations that must occur in a specific order.

[0021] Unless otherwise specified, the same reference numerals can refer to components that are generally similar, even if they are shown in different drawings. In one or more embodiments, components that are the same (or components with the same name) in different drawings can have the same or substantially the same functions and characteristics, unless otherwise specified. Each of the names of the components used in the following description is selected for convenience and may be different from the actual product.

[0022] The advantages and features of this specification and the methods for achieving them will become apparent by referring to various examples described in detail hereinafter based on the accompanying drawings. However, this specification is not limited to one embodiment disclosed below and can be configured in various different forms. One embodiment of this specification, etc., is only provided to complete the disclosure of this specification and to fully inform those with ordinary knowledge in the technical field to which the technical idea of this specification belongs of the scope of the technical idea.

[0023] The shapes, sizes, areas, ratios, angles, numbers, etc. disclosed in the drawings for explaining one embodiment of this specification are exemplary, so this specification is not limited to the matters shown in the drawings.

[0024] When terms such as "including", "having", "consisting of", "constituting", "formed" are used in this specification, other parts can be added unless "only" or "merely" is used. The terms used in this specification are only used to explain a specific embodiment and are not intended to limit the scope shown in this specification. The terms used in this specification are only used to explain exemplary embodiments and are not intended to limit the scope shown in this specification. Terms expressing components in the singular include cases where they include a plurality, unless otherwise explicitly stated. An "embodiment" can be an exemplary example. Any implementation described as an "embodiment" or "an example" in this specification should not necessarily be construed as being preferable or advantageous compared to other implementations.

[0025] In one or more embodiments, a component, feature, or corresponding information (e.g., level, range, dimension, size, etc.) may be interpreted as including an error or tolerance range even if no explicit description of these errors or tolerance ranges is provided. The error or tolerance range may be caused by various factors (e.g., process factors, internal or external shocks, noise, etc.).

[0026] In the case of an explanation of a positional relationship, when the positional relationship is being explained, if terms such as "above or upward", "on the upper part", "below or downward", "on the lower part", "near", "adjacent to", "sideways", or "next to", etc. are used to describe the positional relationship between two parts, unless "immediately", "instantly", "closely", or "directly" is used, one or more other parts may be arranged between the two parts. For example, when a structure is described as being "above or upward", "on the upper part", "below or downward", "on the lower part", "near", "adjacent to", "sideways", or "next to", this description must be interpreted to include the case where a third structure is arranged between the structures when they are in contact with each other. For example, when a structure is described as being "above or upward", "on the upper part", "below or downward", "on the lower part", "near", "adjacent to", "sideways", or "next to", this description must be interpreted to include the case where a third structure is arranged or interposed between the structures when they are in contact with each other. Also, "front", "rear", "back", "left", "right", "top", "bottom", "downward", "upward", "upper part", "lower part", "column", "row", "vertical", "horizontal", etc. refer to any reference frame.

[0027] In the case of an explanation of a time relationship, when the time sequence is described by terms such as "after", "subsequent to", "next", "before", etc., unless "immediately", "instantly", or "directly" is used, it may include cases that are continuous or non - continuous.

[0028] Terms such as "first", "second", etc. are used to describe various components, but these components are not limited to these terms. These terms are only used to distinguish one component from another. Thus, the first component mentioned below may also be the second component within the technical idea of this specification. Furthermore, the first element, the second element, etc. may be arbitrarily named according to the convenience of those skilled in the art without departing from the scope of this specification. Terms such as "first", "second", etc. can be used to distinguish components from each other, but the functions or structures of the components are not limited by the ordinal numbers before the components or the names of the components.

[0029] In describing the components of this specification, terms such as "first", "second", "A", "B", "(a)", "(b)", etc. may be used. Such terms are for distinguishing the components from other components and are not used to define the essence, basis, order, or number of the components.

[0030] When a component or layer is described as "connected", "coupled", or "linked" to another component, it should be understood that the component can be directly connected to the other component or can be connected, but there may also be other components or other layers "disposed" or "intervening" between the components that can be indirectly connected or can be connected, unless otherwise explicitly stated.

[0031] When a component or layer is described as "contacting" or "overlapping" another component or layer, the component can directly contact or overlap the other component or layer, but it should be understood that one or more other components or layers may be "disposed" or "interposed" between each component or other layer that can indirectly contact or overlap without specific explicit description. For example, for this specification, terms such as "duplicating or duplicated", "overlapping" should be understood as, for example, "duplicating, electrically and / or physically connecting" by connecting surface to surface, for example, "overlapping, electrically and / or physically connecting" by connecting surface to surface.

[0032] The term "at least one" should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "at least one of the first item, the second item, and the third item" can include not only combinations of two or more items presented from the first item, the second item, or the third item, but also any combination of the first item, the second item, and the third item.

[0033] The expression of the first component, the second component "and / or" the third component should be understood as one of the first, second, and third components or any combination or all combinations of the first, second, and third components. For example, A, B and / or C can be regarded as only A, only B, only C, any or some combination of A, B and C, or all of A, B and C. Further, the expression "component A / component B" should be understood as component A and / or component B.

[0034] In one or more embodiments, unless otherwise specified, the terms "between" and "among" may be used interchangeably for convenience. For example, the expression "between a plurality of components" can also be understood as "among a plurality of components". In other embodiments, the expression "among a plurality of components" can also be understood as "between a plurality of components". In one or more embodiments, the number of components can be 2. In one or more embodiments, the number of components can be more than 2.

[0035] In one or more embodiments, the expression "different from each other" can be understood such that any component is different from other components.

[0036] In one or more embodiments, unless otherwise specified, the expressions "one or more of" and "one or more among" may be used interchangeably for convenience. For example, the expression "one or more of" can also be understood as "one or more among". For example, the expression "one or more among" can also be understood as "one or more of".

[0037] Each feature of one or more embodiments of this specification can be partially or wholly combined or combined with each other, enabling various technical linkages and drives, and each embodiment can be implemented independently of each other, or can also be implemented together in an associated relationship. In one or more embodiments, the components of each device according to various embodiments of this specification can be operably coupled or configured.

[0038] The terms used in this specification (including technical and scientific terms) can have the same meaning as those understood by a person of ordinary skill in the technical field to which this specification pertains. Furthermore, terms such as those defined in commonly used dictionaries should be interpreted, for example, to have a meaning consistent with their meaning in the context of the related art, and should not be interpreted as idealized or overly formal meanings unless otherwise specified.

[0039] Hereinafter, with reference to the attached drawings, the vibration devices, vibration devices, and vehicles including them according to various embodiments of this specification will be described in detail. Regarding the reference numerals for the components in each drawing, although the same components may be illustrated in other drawings, unless otherwise specified, the same reference numerals can refer to similar components. Furthermore, for convenience of explanation, the scales, dimensions, sizes, and thicknesses of the components shown in the drawings may have scales, dimensions, sizes, and thicknesses different from the actual ones, and thus are not limited to the scales, dimensions, sizes, and thicknesses shown in the drawings.

[0040] FIG. 1 is a diagram showing a vibration device according to the first embodiment of this specification, FIG. 2 is a cross-sectional view of the line A-A' shown in FIG. 1, FIG. 3 is a cross-sectional view of the line B-B' shown in FIG. 1, and FIG. 4 is a perspective view showing the connection structure between the signal cable and the vibration generating unit shown in FIGS. 1 to 3.

[0041] Referring to FIGS. 1 to 4, the vibration device according to the first embodiment of this specification may include a vibration generating unit 10, a first cover member 30, a second cover member 50, and a signal cable 90.

[0042] The vibration generating unit 10 may include a plurality of vibration units 10A and 10B that are superimposed on each other or overlap each other. For example, the vibration generating unit 10 may include a plurality of vibration units 10A and 10B that are laminated or overlap each other. For example, the vibration generating unit 10 may include a first vibration unit 10A and a second vibration unit 10B laminated on the first vibration unit 10A.

[0043] The plurality of vibrating parts 10A, 10B or the first and second vibrating parts 10A, 10B can be connected to or contacted with each other. For example, the plurality of vibrating parts 10A, 10B or the first and second vibrating parts 10A, 10B can be connected or joined to each other without an intermediate medium such as a connecting member or a contact member. The plurality of vibrating parts 10A, 10B or the first and second vibrating parts 10A, 10B can be directly connected or contacted with each other. For example, the plurality of vibrating parts 10A, 10B or the first and second vibrating parts 10A, 10B can be directly connected or joined to each other without an intermediate medium such as a connecting member or a contact member. For the sake of convenience of explanation, in the description of FIGS. 1 to 4, it is assumed that the vibration generating part 10 includes the first and second vibrating parts 10A, 10B and the description will be made accordingly.

[0044] Each of the first and second vibrating parts 10A, 10B may include a piezoelectric material (or electroactive material) including the piezoelectric effect or a piezoelectric element. For example, the piezoelectric material (or piezoelectric element) may have a characteristic that a potential difference is generated by dielectric polarization due to a change in the relative positions of positive (+) ions and negative (-) ions while a pressure or torsional phenomenon acts on the crystal structure by an external force, and conversely, vibration is generated by an electric field due to an applied voltage.

[0045] Each of the first vibrating part 10A and the second vibrating part 10B may include a vibration layer 11, a first electrode layer 13, and a second electrode layer 15.

[0046] The vibration layer 11 may include a piezoelectric material (or electroactive material) including the piezoelectric effect. The vibration layer 11 may be composed of a ceramic-based material capable of relatively high vibration or a piezoelectric ceramic having a perovskite crystal structure.

[0047] The piezoelectric ceramic may be composed of a single crystal ceramic having a single crystal structure or a ceramic material or polycrystalline ceramic having a polycrystalline structure. The piezoelectric material of the single crystal ceramic is α-AlPO 4 , α-SiO 2, LiNbO 3 , Tb 2 (MoO 4 ) 3 , Li 2 B4O 7 、 or may contain ZnO, but the examples in this specification are not limited thereto. The piezoelectric material of the polycrystalline ceramic may include a PZT (lead zirconate titanate) - based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate) - based material containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but the examples in this specification are not limited thereto. As an alternative, the vibrating layer 11 may include at least one or more of CaTiO 3 , BaTiO 3 , and SrTiO 3 without containing lead (Pb), but the examples in this specification are not limited thereto.

[0048] According to the examples in this specification, the vibrating layers 11 of the first vibrating part 10A and the second vibrating part 10B may have the same ceramic crystal structure as each other or different ceramic crystal structures from each other. For example, the vibrating layer 11 of the first vibrating part 10A and the vibrating layer 11 of the second vibrating part 10B may be composed of single - crystal ceramics or polycrystalline ceramics. For example, either one of the vibrating layer 11 of the first vibrating part 10A and the vibrating layer 11 of the second vibrating part 10B may be composed of single - crystal ceramics, and the other may be composed of polycrystalline ceramics.

[0049] The first electrode layer 13 may be disposed on the first surface (or the lower surface) of the vibrating layer 11. The first electrode layer 13 may have the same size as the vibrating layer 11 or a size smaller than that of the vibrating layer 11.

[0050] The second electrode layer 15 may be disposed on a second surface (or upper surface) different from or opposite to the first surface of the vibrating layer 11. The second electrode layer 15 may have the same size as the vibrating layer 11 or a size smaller than that of the vibrating layer 11. For example, the second electrode layer 15 may have the same shape as the vibrating layer 11, but the embodiments of the present specification are not limited thereto.

[0051] In the stacked structure of the first and second vibrating portions 10A and 10B, in order to prevent an electrical short between the electrode layers adjacent to each other vertically, each of the first electrode layer 13 and the second electrode layer 15 may be formed on a portion remaining except for the edge portion of the vibrating layer 11. For example, the distance between the side surfaces of each of the first electrode layer 13 and the second electrode layer 15 and the side surface of the vibrating layer 11 may be at least 0.5 mm or more. For example, the distance between the side surfaces of each of the first electrode layer 13 and the second electrode layer 15 and the side surface of the vibrating layer 11 may be at least 1 mm or more, but the embodiments of the present specification are not limited thereto.

[0052] One or more of the first electrode layer 13 and the second electrode layer 15 according to an embodiment of the present specification may be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the transparent or translucent conductive material may include ITO (indium tin oxide) or IZO (indium zinc oxide), but the embodiments of the present specification are not limited thereto. The opaque conductive material may include or consist of alloys of silver (Ag) containing gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) containing glass frit, etc., but the embodiments of the present specification are not limited thereto. According to another embodiment of the present specification, each of the first electrode layer 13 and the second electrode layer 15 may contain silver (Ag) having a low specific resistance in order to improve the electrical characteristics and / or vibration characteristics of the vibrating layer 11. For example, carbon may be a carbon material including carbon black, ketjen black, carbon nanotubes, and graphite, but the embodiments of the present specification are not limited thereto.

[0053] A first electrode layer 13 and a second electrode layer 15 made of silver (Ag) containing glass frit, the content of the glass frit can be 1 wt% or more and 12 wt% or less, but the examples in this specification are not limited thereto. The glass frit may contain PbO or Bi 2 O 3 -based substances, but the examples in this specification are not limited thereto.

[0054] According to the examples in this specification, the second electrode layer 15 of the first vibrating part 10A can be electrically connected to or in electrical contact with the first electrode layer 13 of the second vibrating part 10B. For example, the second electrode layer 15 of the first vibrating part 10A can be directly connected to or in direct contact with the first electrode layer 13 of the second vibrating part 10B. For example, the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B can be directly connected to each other or in direct electrical contact without an intermediate medium such as a connecting member or a contact member. Thereby, the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B can be the third electrode layer, the intermediate electrode layer, the internal electrode layer, and the common electrode layer of the vibration generating part 10, but the examples in this specification are not limited thereto.

[0055] The vibration layer 11 can be polarized (or subjected to a polling treatment) by a constant voltage applied to the first electrode layer 13 and the second electrode layer 15 in a constant temperature atmosphere or a temperature atmosphere changed from a high temperature to a normal temperature, but the examples in this specification are not limited thereto. For example, the vibration layer 11 can vibrate by alternately repeating contraction and / or expansion due to the inverse piezoelectric effect by an acoustic signal (or a voice signal or a driving signal) applied to the first electrode layer 13 and the second electrode layer 15 from the outside. For example, the vibration layer 11 can vibrate by vertical vibration and planar vibration due to an acoustic signal applied to the first electrode layer 13 and the second electrode layer 15. The vibration layer 11 can increase the displacement of the vibrating member by contraction and / or expansion in the planar direction, thereby further improving the vibration of the vibrating member.

[0056] The vibration layer 11 of the first vibration part 10A and the vibration layer 11 of the second vibration part 10B can be polarized in the same direction as each other or in opposite directions to each other. For example, the polarization direction formed in the vibration layer 11 of the first vibration part 10A can be in the direction opposite to the polarization direction formed in the vibration layer 11 of the second vibration part 10B. According to the embodiments of the present specification, since the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B are connected to each other, when the polarization direction formed in the vibration layer 11 of the first vibration part 10A is in the direction opposite to the polarization direction formed in the vibration layer 11 of the second vibration part 10B, the first vibration part 10A and the second vibration part 10B can be displaced (or vibrated) in the same direction as each other, so that the vibration amplitude (or displacement amplitude) of the vibration generating part 10 is maximized, and thereby the sound pressure can be improved.

[0057] According to the embodiments of the present specification, either one of the first vibration part 10A and the second vibration part 10B can be configured to expose a partial region of the other. Either one of the first vibration part 10A and the second vibration part 10B can be configured to expose a partial region (or a part) of the other to the side of the second cover member 50.

[0058] The vibration device or the vibration generating part 10 according to the first embodiment of the present specification may further include a cutting part 16 configured in either one of the first vibration part 10A and the second vibration part 10B.

[0059] Either one of the first vibration part 10A and the second vibration part 10B may include a cut part 16. The cut part 16 may be formed in either one of the first vibration part 10A and the second vibration part 10B in order to expose a part of the third electrode layer (or internal electrode) of the vibration generating part 10. For example, the cut part 16 may be formed by cutting or chamfering a part of either one of the first vibration part 10A and the second vibration part 10B. The cut part 16 may be configured to include one or more of a linear shape and a curved surface shape. The cut part 16 may be an edge cut part, a chamfered part (or a chamfer part), an edge rounding part, an internal electrode exposed part, a common electrode exposed part, an intermediate electrode exposed part, or an internal exposed part, but the embodiments of this specification are not limited thereto.

[0060] According to the embodiments of this specification, by either one of the first vibration part 10A and the second vibration part 10B including the cut part 16, the first vibration part 10A and the second vibration part 10B may have different shapes from each other. For example, either one of the first vibration part 10A and the second vibration part 10B may have four sides, and the other one may have five or more sides. For example, either one of the first vibration part 10A and the second vibration part 10B may have a square shape or a rectangular shape having four sides, and the other one may have a pentagonal shape in which one of the four corners is cut or chamfered, but the embodiments of this specification are not limited thereto.

[0061] The cut part 16 according to the embodiments of this specification may be formed in the second vibration part 10B in order to expose a part of the third electrode layer (or internal electrode) of the vibration generating part 10.

[0062] The second vibrating part 10B according to the embodiment of the present specification may include a cutting part 16 for exposing a partial area of the area of the first vibrating part 10A. For example, the second vibrating part 10B may include a cutting part 16 for exposing a partial area of the area of the first vibrating part 10A to the second cover member 50 side. For example, the second vibrating part 10B may include a cutting part 16 for exposing the electrode layer disposed closer to the second cover member 50 among the first and second electrode layers 13 and 15 of the first vibrating part 10A to the second cover member 50 side.

[0063] The cutting part 16 may be configured by removing a partial area of the area of the second vibrating part 10B in order to expose the electrode layer disposed closer to the second cover member 50 among the first and second electrode layers 13 and 15 of the first vibrating part 10A. For example, the cutting part 16 may be configured by cutting or chamfering the first corner among the four corners of the second vibrating part 10B. For example, the cutting part 16 may be configured to include one or more of a linear shape and a curved surface shape.

[0064] The first vibrating part 10A according to the embodiment of the present specification may be exposed through the cutting part 16 of the second vibrating part 10B. For example, the first vibrating part 10A may be exposed through the cutting part 16 of the second vibrating part 10B so as to face the second cover member 50. For example, the electrode layer disposed closer to the second cover member 50 among the first and second electrode layers 13 and 15 of the first vibrating part 10A may face the second cover member 50 through the cutting part 16 of the second vibrating part 10B. For example, the second electrode layer 15 of the first vibrating part 10A may face the second cover member 50 or be exposed to the second cover member 50 through the cutting part 16 of the second vibrating part 10B.

[0065] The first cover member 30 can be disposed on the first surface of the vibration generating unit 10. For example, the first cover member 30 can be configured to cover the first vibrating portion 10A of the vibration generating unit 10. For example, the first cover member 30 can be configured to cover the first electrode layer 13 of the first vibrating portion 10A. Accordingly, the first cover member 30 can protect the first surface of the vibration generating unit 10 and the first vibrating portion 10A. For example, the first cover member 30 can be configured to cover the electrode layer that is far from the second vibrating portion 10B among the first electrode layer 13 and the second electrode layer 15 of the first vibrating portion 10A. For example, the first cover member 30 can protect the first surface of the vibration generating unit 10 and the first electrode layer 13 of the first vibrating portion 10A.

[0066] The second cover member 50 can be disposed on the second surface of the vibration generating unit 10. For example, the second cover member 50 can be configured to cover the second vibrating portion 10B of the vibration generating unit 10. For example, the second cover member 50 can be configured to cover the second electrode layer 15 of the second vibrating portion 10B. Accordingly, the second cover member 50 can protect the second surface of the vibration generating unit 10 and the second vibrating portion 10B. For example, the second cover member 50 can be configured to cover the electrode layer that is far from the first vibrating portion 10A among the first electrode layer 13 and the second electrode layer 15 of the second vibrating portion 10B. For example, the second cover member 50 can protect the second surface of the vibration generating unit 10 and the second electrode layer 15 of the second vibrating portion 10B, and can protect the exposed area 15a of the first vibrating portion 10A exposed by the cutting portion 16.

[0067] Each of the first cover member 30 and the second cover member 50 according to the embodiments of the present specification may include one or more materials among plastic, fiber, cloth, paper, leather, rubber, and wood, but the embodiments of the present specification are not limited thereto. For example, each of the first cover member 30 and the second cover member 50 may include the same or different materials from each other. For example, each of the first cover member 30 and the second cover member 50 may be a polyimide film or a polyethylene terephthalate film, but the embodiments of the present specification are not limited thereto.

[0068] One or more of the first cover member 30 and the second cover member 50 according to other embodiments of the present specification may include an adhesive member. For example, one or more of the first cover member 30 and the second cover member 50 may include an adhesive member that is coupled or adhered to the vibration units 10A and 10B, and a protective member (or release member) that covers or protects the adhesive member. For example, the adhesive member may include an electrically insulating material that has adhesiveness and is compressible and recoverable. For example, the first cover member 30 may include an adhesive member that is coupled or adhered to the vibration units 10A and 10B, and a protective member (or release member) that covers or protects the adhesive member.

[0069] The first cover member 30 may be connected or coupled to at least a part of the first surface of the vibration generating unit 10 or the first electrode layer 13 of the first vibration unit 10A via the first adhesive layer 41. For example, the first cover member 30 may be connected or coupled to at least a part of the first surface of the vibration generating unit 10 or the first electrode layer 13 of the first vibration unit 10A by a film lamination process mediated by the first adhesive layer 41.

[0070] The second cover member 50 may be connected or coupled to at least a part of the second surface of the vibration generating unit 10 or the second electrode layer 15 of the second vibration unit 10B via the second adhesive layer 42. For example, the second cover member 50 may be connected or coupled to at least a part of the second surface of the vibration generating unit 10 or the second electrode layer 15 of the second vibration unit 10B by a film lamination process mediated by the second adhesive layer 42.

[0071] Each of the first adhesive layer 41 and the second adhesive layer 42 according to the embodiments of the present specification may include an electrically insulating material that has adhesiveness and is compressible and recoverable. For example, each of the first adhesive layer 41 and the second adhesive layer 42 may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, but the embodiments of the present specification are not limited thereto.

[0072] The signal cable 90 can be configured to be connected to each of the first and second vibrating parts 10A and 10B of the vibration generating part 10 on one side of the vibration generating part 10. The signal cable 90 can be connected to each of the first and second vibrating parts 10A and 10B between the first cover member 30 and the second cover member 50.

[0073] The end portion (or terminal portion) of the signal cable 90 can be disposed or inserted into a portion between one side edge portion (EP) of the first cover member 30 and one side edge portion (EP) of the second cover member 50. The one side edge portion (EP) of the first cover member 30 and the one side edge portion (EP) of the second cover member 50 can accommodate or cover a part of the signal cable 90 from above and below. Thereby, the signal cable 90 can be integrated with the vibration generating part 10. For example, the vibration device 1 according to the first embodiment of the present specification can be a vibration device in which the signal cable 90 is integrated. For example, the signal cable 90 can be composed of 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 the embodiments of the present specification are not limited thereto.

[0074] The signal cable 90 according to the embodiment of the present specification can include a base member 91 and a plurality of signal lines 92a, 92b, 92c. For example, the signal cable 90 can include a base member 91 and first to third signal lines 92a, 92b, 92c.

[0075] The base member 91 may include a transparent and / or opaque plastic material. For example, the base member 91 may be composed of any one or more of synthetic resins including fluororesin, polyimide-based resin, polyurethane-based resin, polyester-based resin, polyethylene-based resin, and polypropylene-based resin, but is not limited thereto. The base member 91 may be a base film or a base insulating film, but is not limited thereto.

[0076] The base member 91 has a constant width along the first direction (X) and may be extended long along the second direction (Y) intersecting the first direction (X).

[0077] Each of the first to third signal lines (or a plurality of signal lines) 92a, 92b, 92c is arranged on the first surface of the base member 91 so as to be parallel to each other along the second direction (Y), and may be spaced apart from each other or separately arranged along the first direction (X). Each of the first to third signal lines 92a, 92b, 92c may be arranged parallel to each other on the first surface of the base member 91. For example, each of the first to third signal lines 92a, 92b, 92c may be formed on the first surface of the base member 91 or configured in a line shape by patterning a metal layer (or a conductive layer) deposited thereon.

[0078] The ends (or terminal portions) of each of the first to third signal lines 92a, 92b, 92c may be individually bent or curved by being separated from each other.

[0079] The end portion (or terminal portion) of the first signal line 92a can be electrically connected to the electrode layer of the first and second electrode layers 13 and 15 of the first vibrating portion 10A that is closer to the first cover member 30. For example, the end portion of the first signal line 92a can be electrically connected to at least a part of the first electrode layer 13 of the first vibrating portion 10A at one side edge portion (EP) of the first cover member 30. For example, the end portion of the first signal line 92a can be directly electrically connected to at least a part of the first electrode layer 13 of the first vibrating portion 10A. For example, the end portion of the first signal line 92a can be directly connected to or directly contacted with the first electrode layer 13 of the first vibrating portion 10A. Thereby, the first signal line 92a can supply the first drive signal supplied from the vibration drive circuit to the first electrode layer 13 of the first vibrating portion 10A.

[0080] The end portion of the second signal line 92b can be electrically connected to the electrode layer of the first and second electrode layers 13 and 15 of the second vibrating portion 10B that is closer to the second cover member 50. For example, the end portion of the second signal line 92b can be electrically connected to at least a part of the second electrode layer 15 of the second vibrating portion 10B at one side edge portion (EP) of the second cover member 50. For example, the end portion of the second signal line 92b can be directly electrically connected to at least a part of the second electrode layer 15 of the second vibrating portion 10B. For example, the end portion of the second signal line 92b can be directly connected to or directly contacted with the second electrode layer 15 of the second vibrating portion 10B. Thereby, the second signal line 92b can supply the second drive signal supplied from the vibration drive circuit to the second electrode layer 15 of the second vibrating portion 10B. For example, the second drive signal can have the same phase as the phase of the first drive signal.

[0081] The end of the third signal line 92c can be electrically connected to the electrode layer closer to the second cover member 50 among the first and second electrode layers 13 and 15 of the first vibrating portion 10A by the cutting portion 16 formed in the second vibrating portion 10B. For example, the end of the third signal line 92c can be electrically connected to at least a part of the second electrode layer 15 of the first vibrating portion 10A at one side edge portion (EP) of the second cover member 50. For example, the end of the third signal line 92c can be electrically connected to at least a part of the exposed region 15a of the second electrode layer 15 of the first vibrating portion 10A exposed by the cutting portion 16 of the second vibrating portion 10B. For example, the end of the third signal line 92c can be directly connected to or directly contacted with the second electrode layer 15 of the first vibrating portion 10A. Therefore, the third signal line 92c can supply the third drive signal supplied from the vibration drive circuit to the second electrode layer 15 of the first vibrating portion 10A, and thereby, the third drive signal can be supplied to the first electrode layer 13 of the second vibrating portion 10B via the second electrode layer 15 of the first vibrating portion 10A. For example, the third drive signal can have a phase opposite to that of the first drive signal or the second drive signal.

[0082] In the first vibrating portion 10A, the first electrode layer 13 can receive the first drive signal via the first signal line 92a, and the second electrode layer 15 can receive the third drive signal via the third signal line 92c. Thereby, the first vibrating portion 10A can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibration layer 11 in response to the first and third drive signals.

[0083] In the second vibrating portion 10B, the third drive signal can be received via the first electrode layer 13, the third signal line 92c, and the second electrode layer 15 of the first vibrating portion 10A, and the second electrode layer 15 can receive the second drive signal via the second signal line 92b. Thereby, the second vibrating portion 10B can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibration layer 11 in response to the second and third drive signals.

[0084] The first vibrating part 10A and the second vibrating part 10B can be bent (or displaced) into the same shape as each other. Therefore, in the vibration generating part 10 or the vibration device, the vibration amplitude (or displacement amplitude) of the first vibrating part 10A and the vibration amplitude (or displacement amplitude) of the second vibrating part 10B can be combined and maximized. For example, in the vibration generating part 10 or the vibration device, the vibration of the first vibrating part 10A and the vibration of the second vibrating part 10B reinforce each other, so that the vibration efficiency or vibration characteristics can be improved, and the vibration amplitude (or displacement amplitude) can be maximized. Thereby, the acoustic characteristics and / or sound pressure characteristics in the low frequency range can be improved.

[0085] The signal cable 90 according to an embodiment of the present specification may further include an insulating member 93.

[0086] The insulating member 93 may be disposed on the first surface of the base member 91 so as to cover each of the first to third signal lines 92a, 92b, and 92c remaining except for the end portion of the signal cable 90. The insulating member 93 may be an insulating layer, a protective layer, a cover layer, a cover layer film, a cover film, or a cover insulating film.

[0087] The signal cable 90 or the base member 91 may include a first extension portion 91a that supports the end portion of the first signal line 92a. The first extension portion 91a can support the first signal line 92a by extending along the second direction (Y) from the end portion of the insulating member 93 that covers the first signal line 92a disposed on the base member 91. The first signal line 92a may be disposed on the upper surface (or upper side surface) of the first extension portion 91a so as to be directly connected to the first vibrating part 10A.

[0088] The signal cable 90 or the base member 91 may include second and third extension portions 91b and 91c that individually support the respective ends of the second and third signal lines 92b and 92c. The second extension portion 91b can support the second signal line 92b by extending along the second direction (Y) from the end of the base member 91. The second signal line 92b may be disposed on the lower surface (or the bottom surface) of the second extension portion 91b so as to be directly connected to the second vibrating portion 10B. The third extension portion 91c can support the third signal line 92c by extending along the second direction (Y) from the end of the base member 91. The third signal line 92c may be disposed on the lower surface (or the bottom surface) of the third extension portion 91c so as to be directly connected to the first vibrating portion 10A.

[0089] The signal cable 90 may include first to third extension portions 91a, 91b, and 91c that support the respective ends of the first to third signal lines 92a, 92b, and 92c separated from each other. For example, the first to third extension portions 91a, 91b, and 91c may be separated from each other between one side edge portion (EP) of the first cover member 30 and one side edge portion (EP) of the second cover member 50. Thereby, the respective ends (or the terminal portions) of the first to third signal lines 92a, 92b, and 92c can be bent or curved individually by being separated from each other.

[0090] According to another embodiment of the present specification, each of the first to third extension portions 91a, 91b, and 91c of the signal cable 90 or the base member 91 may be omitted. For example, each of the first to third signal lines 92a, 92b, and 92c may protrude or extend in a finger shape from the end of the base member 91 and be electrically connected or electrically contacted with the corresponding electrode layers 13 and 15 between one side edge portion (EP) of the first cover member 30 and one side edge portion (EP) of the second cover member 50. For example, the respective ends of the first to third signal lines 92a, 92b, and 92c may be electrically connected or electrically contacted with the corresponding electrode layers 13 and 15 via a conductive double-sided tape, thereby ensuring the adhesive force with the corresponding electrode layers 13 and 15.

[0091] The end portion (or terminal portion) of the signal cable 90 inserted between the first cover member 30 and the second cover member 50 can be inserted and fixed between the first cover member 30 and the second cover member 50 by a film laminating process mediated by the first adhesive layer 41 formed on the first cover member 30 and the second adhesive layer 42 formed on the second cover member 50. As a result, the first signal line 92a is maintained in an electrically connected state with the first electrode layer 13 of the first vibrating portion 10A, the second signal line 92b is maintained in an electrically connected state with the second electrode layer 15 of the second vibrating portion 10B, and the third signal line 92c can be maintained in an electrically connected state with the second electrode layer 15 of the first vibrating portion 10A. And by inserting (or accommodating) and fixing the end portion (or terminal portion) of the signal cable 90 between the first cover member 30 and the second cover member 50, it is possible to prevent a poor connection between the vibration generating portion 10 and the signal cable 90 due to the floating of the signal cable 90.

[0092] In the vibration device according to the first embodiment of the present specification, since the first to third signal lines 92a, 92b, 92c of the signal cable 90 are connected to the electrode layer of the vibration generating portion 10 between the first cover member 30 and the second cover member 50, the soldering process for the electrical connection between the vibration generating portion 10 and the signal cable 90 is unnecessary, so the structure and the manufacturing process can be simplified. And the vibration device according to the first embodiment of the present specification includes a plurality of vibrating portions 10A, 10B that are superimposed on each other or overlap each other so as to vibrate (or displace) in the same direction as each other, so that the vibration efficiency or vibration characteristics are improved, and the vibration amplitude (or displacement amplitude) can be maximized. As a result, the acoustic characteristics and / or sound pressure characteristics in the low frequency band can be improved.

[0093] FIG. 5 is another cross-sectional view of the line A-A' shown in FIG. 1, FIG. 6 is a perspective view showing the vibration generating portion shown in FIG. 5, and FIG. 7 is a perspective view showing the adhesive member disposed on the first vibration portion shown in FIGS. 5 and 6. FIGS. 5 to 7 further constitute an adhesive member for the vibration device according to the first embodiment of the present specification described with reference to FIGS. 1 to 4. Therefore, in the description of FIGS. 5 to 7, the same drawing reference numerals are given to the remaining configurations except for the adhesive member and the configurations related thereto, and the overlapping descriptions thereof can be omitted.

[0094] Referring to FIGS. 5 to 7, the vibration device or the vibration generating portion 10 according to the second embodiment of the present specification may further include an adhesive member 17.

[0095] The adhesive member 17 may be configured to enhance the adhesive force between the plurality of vibration portions 10A and 10B disposed on the vibration generating portion 10. The adhesive member 17 may be disposed along the edge portion between the plurality of vibration portions 10A and 10B. The adhesive member 17 may be formed or disposed in the region (or overlapping region) between the plurality of vibration portions 10A and 10B.

[0096] The adhesive member 17 according to the embodiment of the present specification may be formed or disposed between the edge portion of the first vibration portion 10A and the edge portion of the second vibration portion 10B. For example, the adhesive member 17 may be formed on the edge portion of the first vibration portion 10A that overlaps the second vibration portion 10B. For example, the adhesive member 17 may surround the side surface (or side wall) 15s of the first vibration portion 10A (or the second electrode layer 15 of the first vibration portion 10A) remaining except for the exposed region 15a of the first vibration portion 10A exposed by the cut portion 16 of the second vibration portion 10B. For example, the adhesive member 17 may be connected or adhered between the edge portion of the vibration layer 11 of the first vibration portion 10A and the edge portion of the vibration layer 11 of the second vibration portion 10B. Thereby, by improving the adhesive force between the first vibration portion 10A and the second vibration portion 10B, the contact force or adhesive force between the second electrode layer 15 of the first vibration portion 10A and the first electrode layer 13 of the second vibration portion 10B is improved, and the vibration efficiency or vibration characteristics of each of the first vibration portion 10A and the second vibration portion 10B can be improved.

[0097] The connecting member 17 can be separated from the side surface (or side wall) of the first vibration layer 11 of the first vibration part 10A, whereby it is possible to prevent the adhesive member 17 from overflowing in the side surface direction from the first vibration part 10A and the second vibration part 10B.

[0098] The adhesive member 17 may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, but the examples in this specification are not limited thereto. For example, the adhesive member 17 may include an acrylic-based substance (or material) having a relatively strong adhesive force between acrylic and urethane and having a high hardness property. Thereby, the vibration between the first vibration part 10A and the second vibration part 10B is transmitted well, so that the vibration efficiency or vibration characteristics can be improved.

[0099] The vibration device according to the second embodiment of this specification can further improve the vibration efficiency or vibration characteristics by improving the adhesive force between the first vibration part 10A and the second vibration part 10B by the adhesive member 17.

[0100] FIG. 8 is a diagram showing the first vibration part of the vibration device according to the third embodiment of this specification. FIG. 8 is obtained by changing the second electrode layer of the first vibration part in the vibration device shown in FIGS. 1 to 7. Therefore, in the description of FIG. 8, the same drawing reference numerals are given to the remaining configurations except for the second electrode layer of the first vibration part and the configurations related thereto, and the overlapping descriptions thereof can be omitted.

[0101] Referring to FIGS. 2, 5, and 8, the vibration device according to the third embodiment of this specification can be manufactured or formed by a plastic process (or curing process) of the electrode layer.

[0102] According to the embodiments of this specification, the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B can be directly connected to each other by a plastic process. For example, according to the manufacturing process of the vibrating device, one or more of the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B overlap each other in a semi-cured state or a state where they are not fully cured, and then are directly connected to each other by a plastic process (or a curing process), or are chemically and / or physically connected to each other, or can be bonded to each other. For example, each of the first electrode layer 13 of the first vibrating part 10A and the second electrode layer 15 of the second vibrating part 10B can be cured or fully cured before the plastic process (or the curing process). For example, the second electrode layer 15 of the first vibrating part 10A or the first electrode layer 13 of the second vibrating part 10B can be cured or fully cured before the plastic process.

[0103] According to the embodiments of this specification, the second electrode layer 15 of the first vibrating part 10A may include one or more slits 18. The one or more slits 18 can extend from the central part of the second electrode layer 15 through the side surface of the second electrode layer 15. The one or more slits 18 can serve as a path for discharging the gas of outgassing generated in the plastic process of the second electrode layer 15 and / or the heat of the firing process.

[0104] The vibrating device according to the third embodiment of this specification includes one or more slits 18 formed in the second electrode layer 15 of the first vibrating part 10A, so that the gas of outgassing generated during the plastic process can be smoothly discharged, and the stress applied to the vibrating layer 11 by the heat of the plastic process can be minimized.

[0105] According to other embodiments of the present specification, the first electrode layer 13 of the second vibrating part 10B can include one or more slits. Also in this case, the outgassing gas can be smoothly discharged, and the stress applied to the vibrating layer 11 by the heat of the plastic working process can be minimized. Therefore, the vibrating device according to the third embodiment of the present specification includes one or more slits formed in one or more of the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B, so that the outgassing gas generated in the plastic working process can be smoothly discharged, and the stress applied to the vibrating layer 11 by the heat of the plastic working process can be minimized.

[0106] The vibrating device according to the third embodiment of the present specification can further include the adhesive member 17 described with reference to FIG. 7 in order to improve the adhesive force between the first vibrating part 10A and the second vibrating part 10B, and duplicate explanations thereof can be omitted.

[0107] The adhesive member 17 can include one or more separation parts 17a that communicate with one or more slits 18 formed in the second electrode layer 15 of the first vibrating part 10A. Thereby, the outgassing gas generated during the plastic working process can be discharged through one or more slits 18 formed in the second electrode layer 15 of the first vibrating part 10A and one or more separation parts 17a formed in the adhesive member 17.

[0108] FIG. 9 is a diagram showing a vibrating device according to the fourth embodiment of the present specification, and FIG. 10 is a cross-sectional view taken along line C-C' shown in FIG. 9. The vibrating device according to the fourth embodiment of the present specification is different from the vibrating devices according to the first to third embodiments in that the third signal line is connected to the vibration generating part via a line connecting member. Hereinafter, only the configurations in which the vibrating device according to the fourth embodiment of the present specification and the vibrating devices according to the first to third embodiments of the present specification are different from each other will be described, and the same drawing reference numerals will be given to the same configurations, and the explanations thereof can be omitted.

[0109] Referring to FIGS. 9 and 10, in the vibration device according to the fourth embodiment of the present specification, the line connection member 80 can be electrically connected between the third signal line 92c of the signal cable 90 and the second electrode layer 15 of the first vibration part 10A. For example, the line connection member 80 can be electrically connected between the end of the third signal line 92c and the second electrode layer 15 of the first vibration part 10A between the first cover member 30 and the second cover member 50. Thereby, the third drive signal supplied to the third signal line 92c from the vibration drive circuit can be supplied to the second electrode layer 15 of the first vibration part 10A via the line connection member 80. For example, the line connection member 80 can have the effect of increasing the contact area between the third signal line 92c and the second electrode layer 15 of the first vibration part 10A.

[0110] The line connection member 80 can include a conductive double-sided adhesive member. For example, the line connection member 80 can be a conductive double-sided tape, a conductive double-sided adhesive pad, or a conductive double-sided cushion tape, but the embodiments of the present specification are not limited thereto. The line connection member 80 according to an embodiment of the present specification includes a metal layer, a first adhesive layer (for example, a first adhesive member) bonded to the first surface of the metal layer and electrically contacted or connected to the second electrode layer 15 of the first vibration part 10A, and a second adhesive layer (for example, a second adhesive member) bonded to the second surface of the metal layer and bonded or attached to the third signal line 92c of the signal cable 90.

[0111] According to the embodiments of the present specification, the metal layer can include a copper (Cu) material, but the embodiments of the present specification are not limited thereto. Each of the first and second adhesive layers can contain or include a conductive substance.

[0112] The vibration device according to the fourth embodiment of the present specification can provide a vibration device having the same effect as the vibration devices according to the first to third embodiments. The line connection member 80 increases the supply area of the second drive signal applied to the second electrode layer 15 of the first vibration part 10A, and the vibration efficiency or vibration characteristics of the vibration generating part 10 can be increased.

[0113] According to another embodiment of the present specification, the line connecting member 80 may be connected or coupled to a second cover member 50 that overlaps with the cut portion 16 of the second vibrating portion 10B or overlaps with the exposed region 15a of the second electrode layer 15 of the first vibrating portion 10A. In this case, the line connecting member 80 may be electrically connected or coupled to the third signal line 92c and the second electrode layer 15 of the first vibrating portion 10A in the lamination process of the vibrating device.

[0114] FIG. 11 is a diagram showing a vibrating device according to a fifth embodiment of the present specification, and FIG. 12 is a perspective view showing a connection structure between the signal line of the signal cable shown in FIG. 11 and the vibration generating portion. The vibrating device according to the fifth embodiment of the present specification is different from the vibrating devices according to the first to fourth embodiments in that the cut portion is configured in a groove shape. Hereinafter, only the configurations in which the vibrating device according to the fifth embodiment of the present specification and the vibrating devices according to the first to third embodiments of the present specification are different from each other will be described, and the same drawing reference numerals will be given to the same configurations, and the description thereof may be omitted.

[0115] Referring to FIGS. 11 and 12, the vibrating device or the vibration generating portion 10 according to the fifth embodiment of the present specification may be configured by cutting one side of one side edge portion of the second vibrating portion 10B so as to have a preset size.

[0116] The cut portion 16 may be configured to be recessed in one side of one side edge portion of the second vibrating portion 10B. The cut portion 16 may be configured to be recessed in one or more of a linear shape and a curved shape. Thus, the first vibrating portion 10A may have an M shape or a U shape on a plane. The cut portion 16 may be configured in any one of a square shape, a semi-circular shape, or a semi-elliptical shape. Thereby, the second electrode layer 15 of the first vibrating portion 10A may face the second cover member 50 or be exposed to the second cover member 50 through the cut portion 16 of the second vibrating portion 10B.

[0117] The signal cable 90 may include a first signal line 92a that is electrically connected to or directly contacts at least a part of the first electrode layer 13 of the first vibrating portion 10A, a second signal line 92b that is electrically connected to or directly contacts at least a part of the second electrode layer 15 of the second vibrating portion 10B, and a third signal line 92c that is electrically connected to or directly contacts at least a part of the second electrode layer 15 of the first vibrating portion 10A exposed by the cut portion 16 of the second vibrating portion 10B. Such a signal cable 90 is substantially the same as the signal cable 90 of the vibrating device according to the first to fourth embodiments except that the positions of the first signal line 92a and the third signal line 92c are changed according to the position of the cut portion 16, so duplicate explanations thereof may be omitted.

[0118] The vibrating device according to the fifth embodiment of the present specification can have the same effects as the vibrating devices according to the first to fourth embodiments of the present specification or provide a vibrating device having the same effects. And, the vibrating device according to the fifth embodiment of the present specification includes a cut portion 16 configured to be recessed on one side of the second vibrating portion 10B, so that the contact area (or connection area) between the second electrode layer 15 of the first vibrating portion 10A exposed by the cut portion 16 and the third signal line 92c can be increased, whereby the vibration efficiency or vibration characteristics of the vibration generating portion 10 can be improved.

[0119] FIGS. 13A to 13C are views showing the adhesive layer of the vibrating device according to the sixth embodiment of the present specification. The vibrating device according to the sixth embodiment of the present specification is different from the vibrating devices according to the first to fifth embodiments of the present specification in that an adhesive layer is disposed between the first vibrating electrode layer and the second vibrating electrode layer. Therefore, in the description of FIGS. 13A to 13C, the same drawing reference numerals are given to the configurations remaining except for the adhesive layer and the related configurations, and duplicate explanations thereof may be omitted.

[0120] Referring to FIGS. 12 and 13A, the vibrating device according to the sixth embodiment of the present specification may further include an adhesive layer 19.

[0121] The adhesive layer (or internal adhesive layer) 19 according to the embodiment of the present specification may be disposed or formed in a partial region of the second electrode layer 15 of the first vibrating portion 10A so as to have a line shape. For example, the adhesive layer 19 may include a pair of adhesive lines 19a and 19b disposed in a partial region of the second electrode layer 15 of the first vibrating portion 10A.

[0122] The pair of adhesive lines 19a and 19b may be arranged parallel to each other at the edge portions on both sides of the second electrode layer 15 of the first vibrating portion 10A. For example, the pair of adhesive lines 19a and 19b may be arranged parallel to the second direction (Y).

[0123] The pair of adhesive lines 19a and 19b may be disposed or interposed between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B. Thereby, the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B are adhered to each other by a line adhesion method using the pair of adhesive lines 19a and 19b, so that the adhesive force is improved, and thereby the vibration efficiency or vibration characteristics of the vibration device may be increased and the sound pressure may be increased.

[0124] Referring to FIGS. 12 and 13B, the adhesive layer (or internal adhesive layer) 19 according to an embodiment of the present specification may be disposed in a half region on one side of the second electrode layer 15 of the first vibrating portion 10A so as to correspond to half (50%) of the overlapping area between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B. Thereby, the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B are adhered to each other by a surface adhesion method using the adhesive layer 19, so that the adhesive force is further improved, and thereby the vibration efficiency or vibration characteristics of the vibration device may be improved and the sound pressure may be increased.

[0125] Referring to FIGS. 12 and 13C, an adhesive layer (or internal adhesive layer) 19 according to an embodiment of the present specification can be disposed on the second electrode layer 15 of the first vibrating portion 10A so as to correspond to the entire overlapping area between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B. For example, the adhesive layer 19 can be formed or disposed on the entire remaining area of the region of the second electrode layer 15 of the first vibrating portion 10A excluding the region overlapping with the cut portion 16 of the second vibrating portion 10B. Thereby, the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B are adhered to each other by the full-surface adhesion method using the adhesive layer 19, so that the adhesive force is further improved, and thereby the vibration efficiency or vibration characteristics of the vibration device can be improved and the sound pressure can be further increased.

[0126] The adhesive layer 19 shown in FIGS. 13A to 13C may include a pressure sensitive adhesive, an optical adhesive, or a curable epoxy adhesive, but the embodiments of the present specification are not limited thereto. The adhesive layer 19 can be a conductive adhesive layer including conductive particles, conductive nanoparticles, conductive nanowires, or conductive balls. The conductive adhesive layer 19 can improve the adhesive force and electrical conductivity between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B, and thereby the vibration efficiency or vibration characteristics of the vibration device can be improved and the sound pressure can be further increased.

[0127] FIG. 14 is another cross-sectional view of the line A-A' shown in FIG. 1, and FIG. 15 is a view showing the vibration generating portion shown in FIG. 14. The vibration device according to the seventh embodiment of the present specification shown in FIGS. 14 and 15 is obtained by additionally configuring a contact member on the vibration device according to the first embodiment of the present specification. Hereinafter, the vibration device according to the seventh embodiment of the present specification will be described centering on the configuration different from the vibration device according to the first embodiment of the present specification. The embodiments of the present specification shown in FIGS. 14 and 15 can be applied to the vibration devices according to the second, fourth, and fifth embodiments.

[0128] Referring to FIGS. 1, 14, and 15, the vibration device according to the seventh embodiment of the present specification may further include a contact member 20.

[0129] The contact member 20 can be disposed or interposed between the first vibrating portion 10A and the second vibrating portion 10B. For example, the contact member 20 can be disposed or interposed between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B. For example, the contact member 20 can be electrically connected or connected to each of the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B. For example, the contact member 20 can be an internal connection member, an internal contact member, an electrode contact member, or an interlayer connection member, but the embodiments of this specification are not limited thereto.

[0130] The contact member 20 according to the embodiments of this specification can include a conductive double-sided adhesive member. For example, the contact member 20 can be a conductive double-sided tape, a conductive double-sided adhesive pad, or a conductive double-sided cushion tape, but the embodiments of this specification are not limited thereto. The contact member 20 according to an embodiment of this specification can include a metal layer, a first adhesive layer (for example, a first adhesive member) bonded to the first surface of the metal layer and electrically contacted or connected to the second electrode layer 15 of the first vibrating portion 10A, and a second adhesive layer (for example, a second adhesive member) bonded to the second surface of the metal layer and bonded or attached to the third signal line 92c of the signal cable 90.

[0131] According to the embodiments of this specification, the metal layer can include a copper (Cu) material, but the embodiments of this specification are not limited thereto. Each of the first and second adhesive layers can contain or contain a conductive substance.

[0132] The contact member 20 can have the same shape as the second electrode layer 15 of the first vibrating portion 10A. For example, the contact member 20 can have the same or smaller size than the second electrode layer 15 of the first vibrating portion 10A. For example, the contact member 20 can be superimposed on the cut portion 16 formed in the second vibrating portion 10B. Thereby, the contact member 20 can be exposed through the cut portion 16 formed in the second vibrating portion 10B.

[0133] The exposed area 20a of the contact member 20 exposed by the cutting portion 16 formed in the second vibrating portion 10B may be electrically connected or can be electrically connected to the third signal line 92c of the signal cable 90. Thereby, the third drive signal supplied to the third signal line 92c of the signal cable 90 can be applied to the second electrode layer 15 of the first vibrating portion 10A via the contact member 20, and at the same time can be applied to the first electrode layer 13 of the second vibrating portion 10B via the contact member 20.

[0134] In the first vibrating portion 10A, the first electrode layer 13 can receive the first drive signal via the first signal line 92a, and the second electrode layer 15 can receive the third drive signal via the third signal line 92c and the contact member 20. Thereby, the first vibrating portion 10A can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibrating layer 11 in response to the first and third drive signals.

[0135] In the second vibrating portion 10B, the first electrode layer 13 can receive the third drive signal via the third signal line 92c and the contact member 20, and the second electrode layer 15 can receive the second drive signal via the second signal line 92b. Thereby, the second vibrating portion 10B can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibrating layer 11 in response to the second and third drive signals.

[0136] The vibration device according to the seventh embodiment of the present specification can have the same effect as the vibration device according to the first embodiment of the present specification or can provide a vibration device having the same effect. By improving the adhesive force between the second electrode layer 15 of the first vibrating portion 10A and the first electrode layer 13 of the second vibrating portion 10B by the contact member 20, the vibration efficiency or vibration characteristics of the vibration device can be improved and the sound pressure can be increased.

[0137] FIG. 16 is a diagram showing a vibration device according to the eighth embodiment of the present specification, FIG. 17 is an exploded perspective view showing the vibration generating portion shown in FIG. 16, FIG. 18 is a cross-sectional view taken along line D-D' shown in FIG. 16, and FIG. 19 is a perspective view showing a connection structure between the signal cable and the vibration generating portion shown in FIG. 16. FIGS. 16 to 19 are modifications of the second vibration portion and the contact member of the vibration device according to the seventh embodiment of the present specification. Hereinafter, the vibration device according to the eighth embodiment of the present specification will be described centering on the configuration different from the vibration device according to the seventh embodiment of the present specification. The embodiments of the present specification shown in FIGS. 16 to 19 can be applied to the vibration devices according to the second, fourth, and fifth embodiments.

[0138] Referring to FIGS. 16 to 19, in the vibration device according to the eighth embodiment of the present specification, the second vibration portion 10B can be configured to have the same shape and the same size as the first vibration portion 10A. For example, the second vibration portion 10B can be superimposed or overlapped with the first vibration portion 10A with the contact member 20 interposed therebetween. Thereby, the second electrode layer 15 of the first vibration portion 10A and the first electrode layer 13 of the second vibration portion 10B can be brought into surface-to-surface contact via the contact member 20, and by improving the adhesive force between the second electrode layer 15 of the first vibration portion 10A and the first electrode layer 13 of the second vibration portion 10B, the vibration efficiency or vibration characteristics of the vibration device can be improved and the sound pressure can be increased.

[0139] The contact member 20 is disposed between the first vibration portion 10A and the second vibration portion 10B and can include a protruding portion 21 protruding outside the edge portion on one side of the vibration generating portion 10. The protruding portion 21 can protrude from one side edge of the contact member 20 along the second direction (Y). The protruding portion 21 can protrude from one side edge of the contact member 20 within the range of being superimposed on each of the first cover member 30 and the second cover member 50.

[0140] The signal cable 90 may include a first signal line 92a that is electrically connected to or in direct contact with at least a part of the first electrode layer 13 of the first vibrating portion 10A, a second signal line 92b that is electrically connected to or in direct contact with at least a part of the second electrode layer 15 of the second vibrating portion 10B, and a third signal line 92c that is electrically connected to or in direct contact with at least a part of the protruding portion 21 of the contact member 20. Such a signal cable 90 is substantially the same as the signal cable 90 of the vibration device according to the first embodiment except that the positions of the first signal line 92a and the third signal line 92c are changed according to the position of the protruding portion 21 of the contact member 20, and thus the overlapping description thereof may be omitted.

[0141] The vibration device according to the eighth embodiment of the present specification may have the same effect as the vibration device according to the first embodiment of the present specification or provide a vibration device having the same effect. And, in the vibration device according to the eighth embodiment of the present specification, the adhesive force between the first vibrating portion 10A and the second vibrating portion 10B is improved by the contact member 20, so that the vibration efficiency or vibration characteristics of the vibration device may be improved and the sound pressure may be increased. The vibration device according to the eighth embodiment of the present specification includes the protruding portion 21 of the contact member 20, so that a drive signal can be supplied to the intermediate electrode layer (or common electrode layer) of the first vibrating portion 10A and the second vibrating portion 10B through the protruding portion 21 of the contact member 20 without forming the cutting portion 16 in the second vibrating portion 10B. As a result, the vibration efficiency or vibration characteristics may be improved by increasing the area of the second vibrating portion 10B.

[0142] FIG. 20 is a diagram showing a vibration device according to the ninth embodiment of the present specification, FIG. 21 is a cross-sectional view of the line E-E' shown in FIG. 20, FIG. 22 is an exploded perspective view showing the vibration generating section shown in FIG. 21, and FIG. 23 is a perspective view showing the connection structure between the signal cable and the vibration generating section shown in FIG. 20. FIGS. 20 to 23 are obtained by additionally configuring a third vibration section in the vibration device according to the first embodiment of the present specification and changing the signal cable. Hereinafter, the vibration device according to the ninth embodiment of the present specification will be described centering on the configuration different from that of the vibration device according to the first embodiment of the present specification. The ninth embodiment of the present specification shown in FIGS. 20 to 23 can be applied to the vibration devices according to the second to eighth embodiments. The description of the vibration devices according to the second to eighth embodiments of the present specification may be included in the description of the vibration device shown in FIGS. 20 to 23.

[0143] Referring to FIGS. 20 to 23, the vibration generating section 10 of the vibration device according to the ninth embodiment of the present specification may further include a third vibration section 10C.

[0144] The third vibration section 10C may be disposed between the first vibration section 10A and the first cover member 30. The third vibration section 10C may be directly connected to or in contact with the first vibration section 10A. For example, the third vibration section 10C may be laminated on or overlap the first vibration section 10A. The third vibration section 10C and the first vibration section 10A may be directly connected to each other or in direct electrical contact without an intermediate medium such as a connecting member or a contact member.

[0145] The third vibration section 10C may include a piezoelectric material (or electroactive material) including a piezoelectric effect or a piezoelectric element. The third vibration section 10C may include a vibration layer 11, a first electrode layer 13, and a second electrode layer 15, which are substantially the same as those of the first and second vibration sections 10A and 10B described with reference to FIGS. 1 to 4, respectively, and thus the overlapping description thereof may be omitted.

[0146] According to the embodiments of this specification, the second electrode layer 15 of the third vibrating part 10C can be electrically connected to or in electrical contact with the first electrode layer 13 of the first vibrating part 10A. For example, the second electrode layer 15 of the third vibrating part 10C can be directly connected to or in contact with the first electrode layer 13 of the first vibrating part 10A. For example, the second electrode layer 15 of the third vibrating part 10C and the first electrode layer 13 of the first vibrating part 10A can be directly connected to each other or in direct electrical contact without an intermediate medium such as a connecting member or a contact member. Thereby, the first electrode layer 13 of the first vibrating part 10A and the second electrode layer 15 of the third vibrating part 10C can be the fourth electrode layer, the second intermediate electrode, the second internal electrode, and the second common electrode of the vibration generating part 10, but the embodiments of this specification are not limited thereto. For example, the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B can be the third electrode layer, the first intermediate electrode, the first internal electrode, and the first common electrode of the vibration generating part 10, but the embodiments of this specification are not limited thereto.

[0147] The vibrating layer 11 of the first vibrating part 10A can be polarized in a direction opposite to that of the vibrating layer 11 of the second vibrating part 10B, and can be polarized in the same direction as the vibrating layer 11 of the third vibrating part 10C. Thereby, since the first to third vibrating parts 10A, 10B, 10C can be displaced (or vibrated) in the same direction as each other, the vibration amplitude (or displacement amplitude) of the vibration generating part 10 can be further maximized, and thereby the sound pressure can be further improved.

[0148] The vibration device or vibration generating part 10 according to the ninth embodiment of this specification can further include a first cutting part 16 formed in the second vibrating part 10B and a second cutting part 26 formed in the third vibrating part 10C.

[0149] The first cutting portion 16 can be configured by removing a part of the region of the second vibrating portion 10B in order to expose a first region of the electrode layer, which is disposed closer to the second cover member 50 among the first and second electrode layers 13 and 15 of the first vibrating portion 10A. For example, the first cutting portion 16 can be configured by cutting or chamfering a first corner portion among four corner portions of the second vibrating portion 10B. For example, the first cutting portion 16 can be configured in one or more shapes of a linear shape and a curved shape. Since such a first cutting portion 16 is substantially the same as the cutting portion 16 described with reference to FIGS. 1 to 4, duplicate explanations thereof can be omitted.

[0150] The second cutting portion 26 can be configured by removing a part of the region of the third vibrating portion 10C in order to expose a second region of the electrode layer, which is disposed closer to the first cover member 30 among the first and second electrode layers 13 and 15 of the third vibrating portion 10C. For example, the second cutting portion 26 can be configured by cutting or chamfering a second corner portion among four corner portions of the third vibrating portion 10C. For example, the second cutting portion 26 can be configured by cutting or chamfering a second corner portion among four corner portions of the third vibrating portion 10C that is parallel to the first corner portion among four corner portions of the second vibrating portion 10B. For example, the second cutting portion 26 can be configured in one or more shapes of a linear shape and a curved shape. The second cutting portion 26 can be configured to have the same or different shape from the first cutting portion 16. For example, the second cutting portion 26 can be configured to have a size smaller than that of the first cutting portion 16.

[0151] According to an embodiment of the present specification, a part of the first electrode layer 13 of the first vibrating portion 10A can be exposed to face the first cover member 30 through the second cutting portion 26 of the third vibrating portion 10C. A part of the second electrode layer 15 of the first vibrating portion 10A can be exposed to face the second cover member 50 through the first cutting portion 16 of the second vibrating portion 10B.

[0152] The first cover member 30 can be disposed on the first surface of the vibration generating unit 10. For example, the first cover member 30 can be configured to cover the third vibrating portion 10C of the vibration generating unit 10. For example, the first cover member 30 can be configured to cover the first electrode layer 13 of the third vibrating portion 10C. Accordingly, the first cover member 30 can protect the first surface of the vibration generating unit 10 and the third vibrating portion 10C. For example, the first cover member 30 can protect the first surface of the vibration generating unit 10 and the first electrode layer 13 of the third vibrating portion 10C, and can protect the exposed area (or the first exposed area) 13a of the first vibrating portion 10A exposed by the second cutting portion 26.

[0153] The second cover member 50 can be disposed on the second surface of the vibration generating unit 10. For example, the second cover member 50 can be configured to cover the second vibrating portion 10B of the vibration generating unit 10. For example, the second cover member 50 can be configured to cover the second electrode layer 15 of the second vibrating portion 10B. Accordingly, the second cover member 50 can protect the second surface of the vibration generating unit 10 and the second vibrating portion 10B. For example, the second cover member 50 can protect the second surface of the vibration generating unit 10 and the second electrode layer 15 of the second vibrating portion 10B, and can protect the exposed area (or the second exposed area) 15a of the first vibrating portion 10A exposed by the first cutting portion 16.

[0154] The first cover member 30 can be connected or joined to at least a part of the first surface of the vibration generating unit 10 or the first electrode layer 13 of the third vibrating portion 10C via the first adhesive layer 41. For example, the first cover member 30 can be connected or joined to at least a part of the first surface of the vibration generating unit 10 or the first electrode layer 13 of the third vibrating portion 10C by a film lamination process mediated by the first adhesive layer 41.

[0155] The second cover member 50 can be connected or joined to at least a part of the second surface of the vibration generating unit 10 or the second electrode layer 15 of the second vibration unit 10B via the second adhesive layer 42. For example, the second cover member 50 can be connected or joined to at least a part of the second surface of the vibration generating unit 10 or the second electrode layer 15 of the second vibration unit 10B by a film lamination process mediated by the second adhesive layer 42.

[0156] The signal cable 90 can be configured to be connected to each of the first to third vibration units 10A, 10B, and 10C of the vibration generating unit 10 on one side of the vibration generating unit 10. The signal cable 90 can be connected to each of the first to third vibration units 10A, 10B, and 10C between the first cover member 30 and the second cover member 50. For example, the signal cable 90 can be electrically connected or directly contacted with each of the first to third vibration units 10A, 10B, and 10C between the first cover member 30 and the second cover member 50.

[0157] The signal cable 90 according to the embodiment of the present specification may include a base member 91 and a plurality of signal lines 92a, 92b, 92c. For example, the signal cable 90 may include a base member 91 and first to fourth signal lines 92a, 92b, 92c, 92d. Since the signal cable 90 according to the embodiment of the present specification is substantially the same as the signal cable 90 of the vibration device according to the first embodiment of the present specification except that the signal cable 90 further includes the fourth signal line 92d, duplicate descriptions of the first to third signal lines 92a, 92b, 92c may be omitted or simplified.

[0158] The end of the first signal line 92a can be electrically connected to at least a part of the exposed area 13a of the first electrode layer 13 of the first vibrating portion 10A exposed by the second cutting portion 26 of the third vibrating portion 10C. For example, the end of the first signal line 92a can be directly connected to or directly contacted with the first electrode layer 13 of the first vibrating portion 10A. Therefore, the first signal line 92a can supply the first driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the first vibrating portion 10A, whereby the first driving signal can be supplied to the second electrode layer 15 of the third vibrating portion 10C via the first electrode layer 13 of the first vibrating portion 10A.

[0159] According to another embodiment of the present specification, since the end of the first signal line 92a can be electrically connected to at least a part of the exposed area 13a of the first electrode layer 13 of the first vibrating portion 10A via the first line connection member corresponding to the line connection member 80 described with reference to FIGS. 9 and 10, the description of the line connection member 80 can be included in the description of FIGS. 20 to 23.

[0160] The end of the second signal line 92b can be electrically connected to at least a part of the second electrode layer 15 of the second vibrating portion 10B. For example, the end of the second signal line 92b can be directly connected to or directly contacted with the second electrode layer 15 of the second vibrating portion 10B. Therefore, the second signal line 92b can supply the second driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the second vibrating portion 10B. For example, the second driving signal can have the same phase as the phase of the first driving signal.

[0161] The end of the third signal line 92c can be electrically connected to at least a part of the exposed area 15a of the second electrode layer 15 of the first vibrating portion 10A exposed by the first cutting portion 16 of the second vibrating portion 10B. For example, the end of the third signal line 92c can be directly connected to or directly contacted with the second electrode layer 15 of the first vibrating portion 10A. Accordingly, the third signal line 92c can supply the third driving signal supplied from the vibration driving circuit to the second electrode layer 15 of the first vibrating portion 10A, whereby the third driving signal can be supplied to the first electrode layer 13 of the second vibrating portion 10B via the second electrode layer 15 of the first vibrating portion 10A. For example, the third driving signal can have an opposite phase to the phase of the first driving signal or the second driving signal.

[0162] According to another embodiment of the present specification, since the end of the third signal line 92c can be electrically connected to at least a part of the exposed area 15a of the second electrode layer 15 of the first vibrating portion 10A via the first line connection member corresponding to the line connection member 80 described with reference to FIGS. 9 and 10, the description of the line connection member 80 can be included in the description of FIGS. 20 to 23.

[0163] The end of the fourth signal line 92d can be electrically connected to at least a part of the first electrode layer 13 of the third vibrating portion 10C. For example, the end of the third signal line 92c can be directly connected to or directly contacted with the first electrode layer 13 of the third vibrating portion 10C. Accordingly, the fourth signal line 92d can supply the fourth driving signal supplied from the vibration driving circuit to the first electrode layer 13 of the third vibrating portion 10C. For example, the fourth driving signal can have the same phase as the phase of the third driving signal and can have an opposite phase to the phase of the first driving signal or the second driving signal.

[0164] In the first vibrating portion 10A, the first electrode layer 13 can receive a first driving signal via the first signal line 92a, and the second electrode layer 15 can receive a third driving signal via the third signal line 92c. Thereby, the first vibrating portion 10A can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibrating layer 11 in response to the first and third driving signals.

[0165] In the second vibrating portion 10B, the third driving signal can be received via the first electrode layer 13, the third signal line 92c, and the second electrode layer 15 of the first vibrating portion 10A, and the second electrode layer 15 can receive a second driving signal via the second signal line 92b. Thereby, the second vibrating portion 10B can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibrating layer 11 in response to the second and third driving signals.

[0166] In the third vibrating portion 10C, the first electrode layer 13 can receive a fourth driving signal via the fourth signal line 92d, and the second electrode layer 15 can receive the first driving signal via the first signal line 92a and the first electrode layer 13 of the first vibrating portion 10A. Thereby, the third vibrating portion 10C can vibrate (or displace) by alternately repeating contraction and expansion due to the inverse piezoelectric effect generated in the vibrating layer 11 in response to the first and fourth driving signals.

[0167] The first to third vibrating portions 10A, 10B, 10C can bend (or displace) in the same shape as each other. Therefore, in the vibration generating portion 10 or the vibration device, the vibration amplitude (or displacement amplitude) of each of the first to third vibrating portions 10A, 10B, 10C can be adjusted and maximized. For example, in the vibration generating portion 10 or the vibration device, the vibrations of the first to third vibrating portions 10A, 10B, 10C reinforce each other, so that the vibration efficiency or vibration characteristics can be improved and the vibration amplitude (or displacement amplitude) can be maximized. Thereby, the acoustic characteristics and / or sound pressure characteristics in the low frequency band can be improved.

[0168] The vibration device according to the ninth embodiment of this specification can have the same effect as the vibration device according to the first embodiment of this specification, or can provide a vibration device having the same effect. By including first to third vibration parts 10A, 10B, and 10C that are superimposed on each other or overlap each other so as to vibrate (or displace) in the same direction, the vibration efficiency or vibration characteristics can be improved, and the vibration amplitude (or displacement amplitude) can be further maximized. As a result, the acoustic characteristics and / or sound pressure characteristics in the low frequency band can be further improved.

[0169] In the vibration device according to the ninth embodiment of this specification, the vibration generating part 10 may include the adhesive members described with reference to FIGS. 5 to 7. For example, the adhesive members may include a first adhesive member disposed between the edge portion of the first vibration part 10A and the edge portion of the second vibration part 10B, and a second adhesive member disposed between the edge portion of the first vibration part 10A and the edge portion of the third vibration part 10C. In this case, the adhesive force between the first to third vibration parts 10A, 10B, and 10C can be improved.

[0170] In the vibration device according to the ninth embodiment of this specification, the vibration generating part 10 may include one or more slits described with reference to FIG. 8. For example, one or more slits may be formed in one or more of the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B, and may be formed in one or more of the second electrode layer 15 of the first vibration part 10A and the second electrode layer 15 of the third vibration part 10C. In this case, the gas of outgassing generated during the plastic process can be smoothly discharged, and the stress applied to the vibration layer 11 by the heat of the plastic process can be minimized. In the vibration generating part 10, each of the first adhesive member and the second adhesive member may include one or more separation parts communicating with one or more slits. In this case, the gas of outgassing generated during the plastic process can be smoothly discharged.

[0171] In the vibration device according to the ninth embodiment of the present specification, the vibration generating unit 10 may include the adhesive layer described with reference to FIGS. 13A to 13B. For example, the adhesive layer may include a first adhesive layer between the second electrode layer 15 of the first vibration unit 10A and the first electrode layer 13 of the second vibration unit 10B, and a second adhesive layer between the first electrode layer 13 of the first vibration unit 10A and the second electrode layer 15 of the third vibration unit 10C. In this case, the adhesive force between the first to third vibration units 10A, 10B, and 10C can be improved.

[0172] In the vibration device according to the ninth embodiment of the present specification, the vibration generating unit 10 may include the contact member described with reference to FIGS. 14 and 15. For example, the contact member may include a first contact member between the second electrode layer 15 of the first vibration unit 10A and the first electrode layer 13 of the second vibration unit 10B, and a second contact member between the first electrode layer 13 of the first vibration unit 10A and the second electrode layer 15 of the third vibration unit 10C. In this case, the adhesive force between the first to third vibration units 10A, 10B, and 10C can be improved.

[0173] In the vibration device according to the ninth embodiment of the present specification, the vibration generating unit 10 may include the protruding portions of the contact member described with reference to FIGS. 16 to 19. For example, the protruding portions of the contact member may include a first protruding portion protruding from the first contact member beyond the vibration generating unit 10, and a second protruding portion protruding from the second contact member beyond the vibration generating unit 10 so as to be separated from the first protruding portion. The third signal line 92c may be connected to a part of the first protruding portion, and the first signal line 92a may be connected to a part of the second protruding portion. In this case, the vibration efficiency or vibration characteristics can be improved by increasing the area of each of the second vibration unit 10B and the third vibration unit 10C.

[0174] FIG. 24 is a diagram showing an apparatus according to an embodiment of the present specification, and FIG. 25 is a cross-sectional view taken along line F-F' shown in FIG. 24.

[0175] Referring to FIGS. 24 and 25, the apparatus according to an embodiment of the present specification may include passive vibration members 100 and one or more vibration generating devices 200.

[0176] The "device" according to the embodiments of this specification may be a display device, an audio device, an acoustic generating device, a soundbar, an analog sign, or a digital sign, etc., but the embodiments of this specification are not limited thereto.

[0177] The display device may include a display panel including a plurality of pixels for realizing black-and-white or color video, and a driving unit for driving the display panel. For example, the video according to the embodiments of this specification may include electronic video, digital video, still video, or video, etc., and the embodiments of this specification are not limited thereto. For example, the display panel may be 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, etc., but the embodiments of this specification are not limited thereto. For example, in the organic light-emitting display panel, the pixel may include an organic light-emitting element such as an organic light-emitting layer, and the pixel may be a sub-pixel for realizing any one of a plurality of colors constituting the color video. Thereby, the "device" according to the embodiments of this specification may also include a set electronic device or a set device such as a notebook computer, a television, a computer monitor, an automotive apparatus or other forms of a vehicle, etc., which are complete products (complete product or final product) including a display panel such as a liquid crystal display panel or an organic light-emitting display panel, an equipment apparatus, a mobile electronic apparatus such as a smartphone or an electronic pad.

[0178] Analog signage can be advertising billboards, posters, guideboards, etc. Analog signage can include content such as text, pictures, and signs. The content can be arranged to be visible from the side of the passive vibration member 100 of the device. The content can be directly attached to the passive vibration member 100, and a medium such as paper to which the content is attached by printing or the like can also be attached to the passive vibration member 100.

[0179] The passive vibration member 100 can vibrate by the drive (or vibration) of one or more vibration generating devices 200. For example, the passive vibration member 100 can generate one or more of vibration and sound by the drive of one or more vibration generating devices 200.

[0180] The passive vibration member 100 according to an embodiment of the present specification can be a display panel including a display unit (or screen) having a plurality of pixels for realizing black-and-white or color video. Thereby, the passive vibration member 100 can generate one or more of vibration and sound by the drive of one or more vibration generating devices 200. For example, the passive vibration member 100 can generate or output sound synchronized with the video on the display unit by vibrating by the drive of the vibration generating device 200 while displaying the video on the display unit. For example, the passive vibration member 100 can be a vibration object, a display member, a display panel, a signage panel, a passive vibration plate, a front cover, a front member, a vibration panel, a sound panel, a passive vibration panel, a sound output plate, a sound vibration plate, or a video screen, etc., but the embodiments of the present specification are not limited thereto.

[0181] The passive vibration member 100 according to other embodiments of the present specification may include a metal material having material characteristics suitable for vibrating by one or more vibration generating devices 200 to output sound, or may be a vibration plate including a non-metal material (or a composite non-metal material). For example, the passive vibration member 100 may be a vibration plate including one or more materials among metal, plastic, wood, paper, fiber, cloth, leather, rubber, glass, carbon, and mirror. For example, the paper may be cone paper for a speaker. For example, the cone paper may be pulp or foamed plastic, etc., but the embodiments of the present specification are not limited thereto.

[0182] The passive vibration member 100 according to other embodiments of the present specification may include a display panel having pixels for displaying an image, or may include a non-display panel. For example, the passive vibration member 100 may be a display panel having pixels for displaying an image, a screen panel onto which an image is projected from a display device, a lighting panel, a signage panel, an interior material of a transportation means, an exterior material of a transportation means, a glass window of a transportation means, an interior material of a seat of a transportation means, a ceiling material of a building, an interior material of a building, a glass window of a building, an interior material of an aircraft, a glass window of an aircraft, and a mirror, but the embodiments of the present specification are not limited thereto. For example, the non-display panel may include a light-emitting diode lighting panel (or device), an organic light-emitting lighting panel (or device), or an inorganic light-emitting lighting panel (or device), but the embodiments of the present specification are not limited thereto.

[0183] One or more vibration generating devices 200 may be configured to vibrate the passive vibration member 100. One or more vibration generating devices 200 may be configured to be connected to the back surface 100a of the passive vibration member 100 via a connecting member 150. Thereby, one or more vibration generating devices 200 can generate or output one or more of vibration and sound by vibrating the passive vibration member 100 due to the vibration of the passive vibration member 100.

[0184] One or more vibration generating devices 200 may include one or more of the vibration devices described with reference to FIGS. 1 to 23. Therefore, the description of the vibration devices shown in FIGS. 1 to 23 can be included in the description of the vibration generating device 200 shown in FIGS. 24 and 25. For this reason, the same reference numerals are assigned thereto, and duplicate descriptions thereof can be omitted.

[0185] The connecting member 150 may be disposed between the vibration generating device 200 and the passive vibration member 100. The connecting member 150 may be connected between at least a part of the vibration generating device 200 and the passive vibration member 100. The connecting member 150 according to the embodiment of the present specification may be connected between the central portion of the vibration generating device 200 excluding the edge portion of the vibration generating device 200 and the passive vibration member 100. For example, the connecting member 150 may be connected between the central portion of the vibration generating device 200 and the passive vibration member 100 by a partial adhesion method. Since the central portion (or the exact center portion) of the vibration generating device 200 is the portion that becomes the center of vibration, the vibration of the vibration generating device 200 can be efficiently transmitted to the passive vibration member 100 via the connecting member 150. The edge portion of the vibration generating device 200 is not connected to the connecting member 150 and / or the passive vibration member 100 and is in a floating state separated from each of the connecting member 150 and the passive vibration member 100. Therefore, during the bending vibration (or bending vibration) of the vibration generating device 200, the vibration of the edge portion of the vibration generating device 200 is not suppressed (or reduced) by the connecting member 150 and / or the passive vibration member 100, so that the vibration amplitude (or displacement amplitude) of the vibration generating device 200 can be increased. Accordingly, the vibration amplitude (or displacement amplitude) of the passive vibration member 100 due to the vibration of the vibration generating device 200 is increased, and thereby the acoustic characteristics and / or sound pressure characteristics in the low frequency band generated by the vibration of the passive vibration member 100 can be further improved.

[0186] The connecting member 150 according to another embodiment of the present specification may be connected or adhered to the entire front surface of one or more vibration generating devices 200 and the back surface 100a of the passive vibration member 100 by a full surface adhesion method.

[0187] The connecting member 150 according to the embodiment of this specification can be composed of a material including an adhesive layer having strong adhesion or bonding force with respect to the back surface of the display panel or the passive vibration member 100 and each of one or more vibration generating devices 200. For example, the connecting member 150 can include a foam pad, a double-sided tape, or an adhesive, etc., and the embodiments of this specification are not limited thereto. For example, the adhesive layer of the connecting member 150 can include epoxy, acrylic, silicone, or urethane, etc., and the embodiments of this specification are not limited thereto. For example, the adhesive layer of the connecting member 150 can include an acrylic-based substance (or material) having relatively strong adhesion and high hardness characteristics among acrylic and urethane. Thereby, the vibration of one or more vibration generating devices 200 can be efficiently transmitted to the passive vibration member 100.

[0188] The device according to an embodiment of this specification may further include a support member 300 and a coupling member 350.

[0189] The support member 300 can be disposed on the back surface 100a of the passive vibration member 100. The support member 300 can be disposed on the back surface 100a of the passive vibration member 100 so as to cover one or more vibration generating devices 200. The support member 300 can be disposed on the back surface 100a of the passive vibration member 100 so as to cover the entire back surface 100a of the passive vibration member 100 and all of one or more vibration generating 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 back surface of the passive vibration member 100 with a gap space (GS) sandwiched therebetween and one or more vibration generating devices 200. The gap space (GS) can be provided by a coupling member 350 disposed between the passive vibration member 100 and the support member 300 facing each other. The gap space (GS) can be expressed as an air gap, a storage space, a vibration space, or an acoustic box, etc., but is not limited to this term.

[0190] The support member 300 may include any one of a glass material, a metal material, and a plastic material. The support member 300 may include a laminated structure in which at least one or more materials among a glass material, a metal material, and a plastic material are laminated.

[0191] Each of the passive vibration member 100 and the support member 300 may have a square shape or a rectangular shape, but is not limited thereto, and may have a polygonal shape, a non-polygonal shape, a circular shape, or an elliptical shape. For example, when the device according to an embodiment of the present specification is applied to an acoustic device or a sound bar, each of the passive vibration member 100 and the support member 300 may have a rectangle in which the length of the long side is more than twice the length of the short side, but the embodiments of the present specification are not limited thereto.

[0192] The coupling member 350 is configured to be connected between the edge portion of the back surface of the passive vibration member 100 and the edge portion of the front surface of the support member 300, so that a gap space (GS) can be provided between the passive vibration member 100 and the support member 300 facing each other.

[0193] The coupling member 350 according to an embodiment of the present specification may include an elastic material that has adhesiveness and is capable of compression and restoration. For example, the coupling member 350 may include a double-sided tape, a single-sided tape, or a double-sided adhesive foam pad, but is not limited thereto, and may include an elastic pad such as a rubber pad or a silicon pad that has adhesiveness and is capable of compression and restoration. For example, the coupling member 350 may be formed of an elastomer.

[0194] According to an embodiment of the present specification, the support member 300 may further include a side wall portion that supports an edge portion of the back surface of the passive vibration member 100. The side wall portion of the support member 300 may protrude or be bent from the edge portion of the front surface of the support member 300 toward the edge portion side of the back surface of the passive vibration member 100 to provide a gap space (GS) between the passive vibration member 100 and the support member 300. In this case, the coupling member 350 may be configured to be connected between the side wall portion of the support member 300 and the edge portion of the back surface of the passive vibration member 100. Thereby, the support member 300 can cover one or more vibration generating devices 200 and support the back surface 100a of the passive vibration member 100. For example, the support member 300 can cover one or more vibration generating devices 200 and support the edge portion of the back surface of the passive vibration member 100.

[0195] According to another embodiment of the present specification, the passive vibration member 100 may further include a side wall portion that is connected to the edge portion of the front surface of the support member 300. The side wall portion of the passive vibration member 100 may protrude or be bent from the edge portion of the back surface of the passive vibration member 100 toward the edge portion side of the front surface of the support member 300 to provide a gap space (GS) between the passive vibration member 100 and the support member 300. The passive vibration member 100 may have increased rigidity due to the side wall portion. In this case, the coupling member 350 may be configured to be connected between the side wall portion of the passive vibration member 100 and the edge portion of the front surface of the support member 300. Thereby, the support member 300 can cover one or more vibration generating devices 200 and support the back surface 100a of the passive vibration member 100. For example, the support member 300 can cover one or more vibration generating devices 200 and support the edge portion of the back surface of the passive vibration member 100.

[0196] The device according to an embodiment of the present specification may further include an enclosure 250.

[0197] The enclosure 250 can be connected or coupled to the edge portion of the back surface of the passive vibration member 100 so as to individually cover one or more vibration generating devices 200. For example, the enclosure 250 can be connected or coupled to the back surface 100a of the passive vibration member 100 via a coupling member 251. The enclosure 250 can form a sealed space that covers or surrounds one or more vibration generating devices 200 on the back surface 100a of the passive vibration member 100. For example, the enclosure 250 can be a sealing member, a sealing cap, a sealing box, or a sound box, but the embodiments in this specification are not limited thereto. The sealed space can be an air gap, a vibration space, an acoustic space, or a resonance box, but the embodiments in this specification are not limited thereto.

[0198] The enclosure 250 can include one or more materials of a metallic material or a non-metallic material (or a composite non-metallic material). For example, the enclosure 250 can include one or more materials of metal, plastic, carbon, and wood, but the embodiments in this specification are not limited thereto.

[0199] The enclosure 250 according to an embodiment of this specification can keep the impedance component due to air acting on the passive vibration member 100 constant when the passive vibration member 100 or one or more vibration generating devices 200 vibrate. For example, the air around the passive vibration member 100 becomes resistant to the vibration of the passive vibration member 100 and acts as an impedance component having different resistance and reactance components depending on the frequency. Thereby, the enclosure 250 forms a sealed space that surrounds one or more vibration generating devices 200 on the back surface 100a of the passive vibration member 100, so as to keep the impedance component (or air impedance or elastic impedance) acting on the passive vibration member 100 by air constant, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency band and improving the sound quality of the sound in the high frequency band.

[0200] Table 1 below shows the acoustic output characteristics for the configurations of Experimental Examples 2 to 6 of the device according to some embodiments of the present specification. Experimental Example 1 is the average sound pressure (SPL) when the vibration generating part is constituted by a single vibrating part. Experimental Example 2 is the average sound pressure when the vibration generating part is constituted by directly laminating two vibrating parts. Experimental Example 3 is the average sound pressure when the vibration generating part is constituted by laminating two vibrating parts in a line attachment method. Experimental Example 4 is the average sound pressure when the vibration generating part is constituted by laminating two vibrating parts in a partial attachment method. Experimental Example 5 is the average sound pressure when the vibration generating part is constituted by laminating two vibrating parts in a full surface attachment method. Experimental Example 6 is the average sound pressure when the vibration generating part is constituted by laminating three vibrating parts in a full surface attachment method.

[0201] The acoustic output characteristics can be measured by acoustic measurement equipment. The acoustic output characteristics can be APX525 (manufactured by Audio Precision). The acoustic measurement equipment can be composed of a control PC (Control PC), a sound card for transmitting and receiving sound, an amplifier (amplifier) for amplifying and transmitting the sound generated from the sound card to the vibration device, and a microphone for collecting the sound generated on the display panel by driving the vibration device. For example, the microphone can be arranged at the center of the vibration device, and the distance between the display panel and the microphone can be 30 cm. The sound can be measured with the microphone perpendicular to the vibration device. The sound collected by the microphone is input to the control PC via the sound card, and this is confirmed by the control program to analyze the sound of the vibration device. For example, the frequency response characteristics in the frequency range of 20 Hz to 20 kHz can be measured using a pulse program. It can be measured by applying 1 / 3 octave smoothing with a sine sweep at 0.15 to 20 kHz.

Table 1

[0202] Referring to the table, it can be seen that for each of Experimental Examples 2 to 6 according to the embodiments of this specification, the average sound pressure is higher than that of Experimental Example 1 which is composed of a single vibrating part. It can be seen that the average sound pressure of Experimental Example 2 is higher than that of Experimental Example 1. For each of Experimental Examples 3 to 5, it can be seen that compared with Experimental Example 1, the average sound pressure tends to increase as the area of the adhesive layer formed between the two vibrating parts increases.

[0203] Therefore, the vibrating device according to the embodiments of this specification can improve the acoustic characteristics and / or sound pressure characteristics by including a plurality of vibrating parts that overlap or are stacked on each other, and the acoustic characteristics and / or sound pressure characteristics can be further improved by the area of the adhesive layer between the plurality of vibrating parts.

[0204] The vibrating device according to the embodiments of this specification and the device including the same can be described as follows.

[0205] The vibrating device according to the embodiments of this specification may include a vibration generating part including a first vibrating part and a second vibrating part superimposed on the first vibrating part, a first cover member on the first surface of the vibration generating part, a second cover member on the second surface opposite to the first surface of the vibration generating part, and a signal cable having first to third signal lines connected to the first vibrating part and the second vibrating part between the first cover member and the second cover member.

[0206] According to one or more embodiments of this specification, the second vibrating part includes a cutting part for exposing a part of the first vibrating part, and the first vibrating part may include an exposed area facing the second cover member through the cutting part.

[0207] According to one or more embodiments of this specification, any one of the first to third signal lines may be connected to the exposed area of the first vibrating part.

[0208] According to one or more embodiments of this specification, each of the first vibrating part and the second vibrating part may include a vibrating layer including a piezoelectric material, a first electrode layer on the first surface of the vibrating layer, and a second electrode layer on the second surface opposite to the first surface of the vibrating layer.

[0209] According to one or more embodiments of the present specification, the first electrode layer of the second vibrating part can be in contact with the second electrode layer of the first vibrating part.

[0210] According to one or more embodiments of the present specification, the second vibrating part includes a cutting part that exposes a part of the second electrode layer of the first vibrating part, and any one of the first to third signal lines can be connected to a part of the second electrode layer of the first vibrating part exposed by the cutting part of the second vibrating part.

[0211] According to one or more embodiments of the present specification, the vibration generating part further includes a line connecting member that connects any one of the first to third signal lines to a part of the second electrode layer of the first vibrating part exposed by the cutting part of the second vibrating part. The second vibrating part includes a cutting part that exposes a part of the second electrode layer of the first vibrating part, and any one of the first to third signal lines can be connected to a part of the second electrode layer of the first vibrating part exposed by the cutting part of the second vibrating part through the line connecting member.

[0212] According to one or more embodiments of the present specification, the second vibrating part includes a cutting part that exposes a part of the second electrode layer of the first vibrating part. The first signal line is connected to the first electrode layer of the first vibrating part, the second signal line is connected to the second electrode layer of the second vibrating part, and the third signal line can be connected to a part of the second electrode layer of the first vibrating part exposed by the cutting part of the second vibrating part.

[0213] According to one or more embodiments of the present specification, the vibration generating part may further include an adhesive member disposed between the edge portions of the first vibrating part and the second vibrating part respectively.

[0214] According to one or more embodiments of the present specification, one or more of the second electrode layer of the first vibrating part and the first electrode layer of the second vibrating part may include one or more slits.

[0215] According to one or more embodiments of the present specification, the vibration generating part further includes an adhesive member disposed between the edge portions of the first vibrating part and the second vibrating part respectively, and the adhesive member may include one or more separation parts communicating with the one or more slits.

[0216] According to one or more embodiments of the present specification, the vibration generating unit may further include an adhesive layer between the second electrode layer of the first vibrating unit and the first electrode layer of the second vibrating unit.

[0217] According to one or more embodiments of the present specification, the vibration generating unit may further include a contact member between the first vibrating unit and the second vibrating unit.

[0218] According to one or more embodiments of the present specification, the contact member may be a conductive double-sided adhesive member.

[0219] According to one or more embodiments of the present specification, the contact member includes a protruding portion protruding from the vibration generating unit, and any one of the first to third signal lines may be connected to a part of the protruding portion.

[0220] According to one or more embodiments of the present specification, the vibration generating unit further includes a third vibrating unit superimposed on the first vibrating unit, and the signal cable may further include a fourth signal line connected to the third vibrating unit.

[0221] According to one or more embodiments of the present specification, each of the first to third vibrating units may include a vibrating layer containing a piezoelectric material, a first electrode layer on the first surface of the vibrating layer, and a second electrode layer on the second surface opposite to the first surface of the vibrating layer.

[0222] According to one or more embodiments of the present specification, the first electrode layer of the second vibrating unit is in contact with the second electrode layer of the first vibrating unit, and the first electrode layer of the first vibrating unit may be in contact with the first electrode layer of the third vibrating unit.

[0223] According to one or more embodiments of the present specification, the second vibrating unit includes a first cutting portion that exposes a first region of the second electrode layer of the first vibrating unit, and the third vibrating unit may include a second cutting portion that exposes a second region of the first electrode layer of the first vibrating unit.

[0224] According to one or more embodiments of this specification, the first signal line is connected to a part of the first electrode layer of the first vibrating part exposed by the second cutting part of the third vibrating part, the second signal line is connected to the second electrode layer of the second vibrating part, the third signal line is connected to a part of the second electrode layer of the first vibrating part exposed by the first cutting part of the second vibrating part, and the fourth signal line may be connected to the first electrode layer of the third vibrating part.

[0225] According to one or more embodiments of this specification, the vibration generating part further includes a first line connecting member that connects the first signal line and a part of the first electrode layer of the first vibrating part exposed by the second cutting part of the third vibrating part, and a second line connecting member that connects the third signal line and a part of the second electrode layer of the first vibrating part exposed by the first cutting part of the second vibrating part. The first signal line is connected to a part of the first electrode layer of the first vibrating part exposed by the second cutting part of the third vibrating part through the first line connecting member, and the third signal line may be connected to a part of the second electrode layer of the first vibrating part exposed by the first cutting part of the second vibrating part through the second line connecting member.

[0226] According to one or more embodiments of this specification, the vibration generating part may further include a first adhesive member disposed between the edge portions of the first vibrating part and the second vibrating part respectively, and a second adhesive member disposed between the edge portions of the first vibrating part and the third vibrating part respectively.

[0227] According to one or more embodiments of this specification, one or more of the second electrode layer of the first vibrating part and the first electrode layer of the second vibrating part include one or more slits, and one or more of the first electrode layer of the first vibrating part and the second electrode layer of the third vibrating part may include one or more slits.

[0228] According to one or more embodiments of this specification, the vibration generating part further includes a first adhesive member disposed between the edge portions of the first vibrating part and the second vibrating part respectively, and a second adhesive member disposed between the edge portions of the first vibrating part and the third vibrating part respectively. Each of the first adhesive member and the second adhesive member may include one or more separation portions communicating with one or more slits.

[0229] According to one or more embodiments of the present specification, the vibration generating unit may further include a first adhesive layer between the second electrode layer of the first vibration unit and the first electrode layer of the second vibration unit, and a second adhesive layer between the first electrode layer of the first vibration unit and the second electrode layer of the third vibration unit.

[0230] According to one or more embodiments of the present specification, the vibration generating unit may further include a first contact member between the first vibration unit and the second vibration unit, and a second contact member between the first vibration unit and the third vibration unit.

[0231] According to one or more embodiments of the present specification, each of the first contact member and the second contact member may be a conductive double-sided adhesive member.

[0232] According to one or more embodiments of the present specification, the first contact member includes a first protrusion protruding from the vibration generating unit, the second contact member includes a second protrusion protruding from the vibration generating unit, the first signal line may be connected to a part of the second protrusion, and the third signal line may be connected to a part of the first protrusion.

[0233] The device according to an embodiment of the present specification includes a passive vibration member and a vibration generating device connected to the passive vibration member to vibrate the passive vibration member. The vibration generating device includes a vibration device, and the vibration device includes a vibration generating unit including a first vibration unit and a second vibration unit superimposed on the first vibration unit, a first cover member on the first surface of the vibration generating unit, a second cover member on the second surface opposite to the first surface of the vibration generating unit, and a signal cable having first to third signal lines connected to the first vibration unit and the second vibration unit between the first cover member and the second cover member.

[0234] According to one or more embodiments of the present specification, the device may further include an enclosure disposed on the back surface of the passive vibration member to cover the vibration generating device.

[0235] According to one or more embodiments of the present specification, the passive vibration member may include one or more materials among metal, plastic, paper, fiber, cloth, leather, wood, rubber, glass, carbon, and mirror.

[0236] According to one or more embodiments of the present specification, the passive vibration member may include one or more of a display panel having pixels for displaying 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, an interior material of a transportation means, an exterior material of a transportation means, a glass window of a transportation means, an interior material of a seat of a transportation means, a ceiling material of a building, an interior material of a building, a glass window of a building, an interior material of an aircraft, a glass window of an aircraft, and a mirror.

[0237] The device according to one or more embodiments of the present specification includes a passive vibration member, a connecting member, and a vibration generating device that is connected to the passive vibration member by the connecting member and vibrates the passive vibration member. The vibration generating device includes a vibration device. The vibration device includes a vibration generating unit including a first vibration unit and a second vibration unit superimposed on the first vibration unit, a first cover member on a first surface of the vibration generating unit, a second cover member on a second surface opposite to the first surface of the vibration generating unit, and a signal cable having first to third signal lines connected to the first vibration unit and the second vibration unit between the first cover member and the second cover member.

[0238] According to one or more embodiments of the present specification, the connecting member is connected between the passive vibration member and the central portion of the vibration generating device, and the edge portion of the vibration generating device is not connected to the connecting member and / or the passive vibration member and may be in a floating state separated from each of the connecting member and the passive vibration member.

[0239] According to one or more embodiments of the present specification, the connecting member includes a substance including an adhesive layer, and the connecting member may be connected or adhered to the entire front surface of the vibration generating device and the back surface of the passive vibration member.

[0240] The vibration device according to one or more embodiments of the present specification can be applied to a vibration device disposed in a device. The device (or display device) according to one or more embodiments of the present specification includes a mobile device, a video phone, a smart watch, a watch phone, a wearable apparatus, a foldable apparatus, a rollable apparatus, a bendable apparatus, a flexible apparatus, a curved apparatus, a sliding apparatus, a variable apparatus, an electronic notebook, an electronic book, a PMP (portable multimedia player), a PDA (personal digital assistant), an MP3 player, a mobile medical device, a desktop PC, a laptop PC, a netbook computer, a workstation, a navigation device, a vehicle navigation device, a vehicle display device, a vehicle apparatus, a theater apparatus, a theater display device, a television, a wallpaper device, a signage device, a game device, a notebook computer, a monitor, a camera, a video camera, and a household electrical appliance, etc. And the vibration generating device according to one or more embodiments of the present specification can be applied to an organic light-emitting lighting device or an inorganic light-emitting lighting device. When the vibration generating device is applied to the lighting device, the lighting device can serve as both lighting and a speaker. And when the vibration generating device according to one or more embodiments of the present specification is applied to a mobile device or the like, the vibration generating device can be one or more of a speaker, a receiver, and a haptic device, but the embodiments of the present specification are not limited thereto.

[0241] The present specification described above is not limited to the foregoing embodiments and the attached drawings, and it will be apparent to those of ordinary skill in the art to which the present specification pertains that various substitutions, modifications, and changes are possible without departing from the technical idea of the present specification. Therefore, the scope of the present specification is indicated by the claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts must be construed as being included within the scope of the present specification.

Explanation of Reference Numerals

[0242] 10: Vibration device 10A: First vibration part 10B: Second vibration part 10C: Third vibration part 11: Vibration layer 13: First electrode layer 15: Second electrode layer 17: Adhesive member 18: Slit 19: Adhesive layer 30: First cover member 50: Second cover member 90: Signal cable 100: Manual vibration member 200: Vibration generating device 300: Support member

Claims

1. a vibration generating unit including a first vibration unit and a second vibration unit overlapped with the first vibration unit; a first cover member on a first surface of the vibration generating unit; a second cover member provided on a second surface of the vibration generating unit opposite to the first surface; a signal cable having first to third signal lines connected to the first vibration portion and the second vibration portion between the first cover member and the second cover member, The vibration generating unit further comprises: a first adhesive layer between the first cover member and a first surface of the vibration generating unit; a second adhesive layer between the second cover member and the second surface of the vibration generating unit, The signal cable further comprises: a base member having a stripe shape and on one surface of which the first to third signal lines are formed; an insulating member covering the first to third signal lines and the one surface of the base member, ends of the first to third signal lines, the base member, and the insulating member are accommodated in a portion between one side edge portion of the first cover member and one side edge portion of the second cover member; the signal cable is integrated with the vibration generating unit, each of the first to third signal lines protrudes from an end of the base member; A vibration device, in a portion between one side edge portion of the first cover member and one side edge portion of the second cover member, the first adhesive layer is between the first cover member and an end of the signal cable, and the second adhesive layer is between the second cover member and an end of the signal cable.

2. the second vibration portion includes a cut portion for exposing a part of the first vibration portion, The vibration device according to claim 1 , wherein the first vibration portion includes an exposed area that faces the second cover member through the cutout portion.

3. The vibration device according to claim 2 , wherein any one of the first to third signal lines is connected to an exposed area of ​​the first vibration part.

4. Each of the first vibration section and the second vibration section is A vibration layer including a piezoelectric material; a first electrode layer on a first surface of the vibration layer; 10. The vibration device of claim 1, further comprising a second electrode layer on a second surface of the vibration layer opposite the first surface.

5. The vibration device according to claim 4 , wherein the first electrode layer of the second vibration portion is in contact with the second electrode layer of the first vibration portion.

6. the second vibration portion includes a cut portion that exposes a part of the second electrode layer of the first vibration portion, The vibration device of claim 5, wherein any one of the first to third signal lines is connected to a portion of the second electrode layer of the first vibration section exposed by the cut portion of the second vibration section.

7. the second vibration portion includes a cut portion that exposes a part of the second electrode layer of the first vibration portion, the vibration generating unit further includes a line connecting member connecting any one of the first to third signal lines to a second electrode layer of the first vibrating unit exposed by the cut portion of the second vibrating unit, The vibration device of claim 5, wherein any one of the first to third signal lines is connected to a portion of the second electrode layer of the first vibration section exposed by the cut portion of the second vibration section via the line connecting member.

8. the second vibration portion includes a cut portion that exposes a part of the second electrode layer of the first vibration portion, the first signal line is connected to a first electrode layer of the first vibration part, the second signal line is connected to a second electrode layer of the second vibration part, The vibration device according to claim 5 , wherein the third signal line is coupled to a part of the second electrode layer of the first vibration portion exposed by the cut portion of the second vibration portion.

9. The vibration device according to claim 1 , wherein the vibration generating section further includes an adhesive member disposed between edge portions of the first vibration section and the second vibration section.

10. The vibration device according to claim 4 , wherein one or more of the second electrode layer of the first vibrating portion and the first electrode layer of the second vibrating portion include one or more slits.

11. the vibration generating unit further includes an adhesive member disposed between edge portions of the first vibration unit and the second vibration unit, The vibration device of claim 10 , wherein the adhesive member includes one or more separation portions that communicate with the one or more slits.

12. The vibration device according to claim 4 , wherein the vibration generating section further includes an inner adhesive layer between the second electrode layer of the first vibration section and the first electrode layer of the second vibration section.

13. The vibration device according to claim 1 , wherein the vibration generating section further includes a contact member between the first vibration section and the second vibration section.

14. The vibration device of claim 13 , wherein the contact member is a conductive double-sided adhesive member.

15. The contact member includes a protrusion protruding from the vibration generating portion, The vibration device according to claim 13 , wherein any one of the first to third signal lines is coupled to a portion of the protrusion.

16. The vibration generating unit further includes a third vibration unit superimposed on the first vibration unit, The vibration device according to claim 1 , wherein the signal cable further includes a fourth signal line coupled to the third vibration portion.

17. Each of the first to third vibration units is A vibration layer including a piezoelectric material; a first electrode layer on a first surface of the vibration layer; 17. The vibration device of claim 16, further comprising a second electrode layer on a second surface of the vibration layer opposite the first surface.

18. a first electrode layer of the second vibration portion contacting a second electrode layer of the first vibration portion; 20. The vibration device of claim 17, wherein a first electrode layer of the first vibrating portion contacts a first electrode layer of the third vibrating portion.

19. the second vibration portion includes a first cut portion that exposes a first region of a second electrode layer of the first vibration portion; The vibration device according to claim 17 , wherein the third vibration section includes a second cut portion that exposes a second region of the first electrode layer of the first vibration section.

20. the first signal line is connected to a portion of the first electrode layer of the first vibrating portion exposed by the second cut portion of the third vibrating portion; the second signal line is connected to a second electrode layer of the second vibration part, the third signal line is connected to a portion of the second electrode layer of the first vibrating portion exposed by the first cut portion of the second vibrating portion; The vibration device of claim 19 , wherein the fourth signal line is connected to the first electrode layer of the third vibration part.

21. The vibration generating unit is a first line connecting member connecting the first signal line and a portion of the first electrode layer of the first vibrating portion exposed by the second cut portion of the third vibrating portion; a second line connecting member connecting the third signal line to a portion of the second electrode layer of the first vibrating portion exposed by the first cut portion of the second vibrating portion, the first signal line is connected to a portion of the first electrode layer of the first vibrating portion exposed by the second cut portion of the third vibrating portion via the first line connecting member; The vibration device according to claim 20 , wherein the third signal line is connected to a portion of the second electrode layer of the first vibration portion exposed by the first cut portion of the second vibration portion via the second line connection member.

22. The vibration generating unit is a first adhesive member disposed between edge portions of the first vibration portion and the second vibration portion; The vibration device according to claim 16 , further comprising a second adhesive member disposed between edge portions of the first vibrating portion and the third vibrating portion.

23. one or more of the second electrode layer of the first vibration section and the first electrode layer of the second vibration section include one or more slits; 20. The vibration device of claim 17, wherein one or more of the first electrode layer of the first vibrating portion and the second electrode layer of the third vibrating portion include one or more slits.

24. The vibration generating unit is a first adhesive member disposed between edge portions of the first vibration portion and the second vibration portion; a second adhesive member disposed between edge portions of the first vibration portion and the third vibration portion, 24. The vibration device of claim 23, wherein each of the first adhesive member and the second adhesive member includes one or more separation portions that communicate with the one or more slits.

25. The vibration generating unit is a first inner adhesive layer between the second electrode layer of the first vibration portion and the first electrode layer of the second vibration portion; 20. The vibration device of claim 17, further comprising a second inner adhesive layer between a first electrode layer of the first vibrating portion and a second electrode layer of the third vibrating portion.

26. The vibration generating unit is a first contact member between the first vibration portion and the second vibration portion; 17. The vibration device of claim 16, further comprising a second contact member between the first vibrating portion and the third vibrating portion.

27. 27. The vibration device of claim 26, wherein each of the first and second contact members is a conductive double-sided adhesive member.

28. the first contact member includes a first protruding portion protruding from the vibration generating portion, the second contact member includes a second protruding portion protruding from the vibration generating portion, the first signal line is connected to a portion of the second protrusion, The vibration device of claim 26 , wherein the third signal line is coupled to a portion of the first protrusion.

29. A passive vibration member; a vibration generating device coupled to the passive vibration member for vibrating the passive vibration member; The vibration generating device comprises a vibration device according to any one of claims 1 to 28.

30. 30. The apparatus of claim 29, further comprising an enclosure disposed on a rear surface of the passive vibration member and covering the vibration generating device.

31. 30. The apparatus of claim 29, wherein the passive vibration member comprises one or more of the following materials: metal, plastic, paper, fiber, cloth, leather, wood, rubber, glass, carbon, and mirror.

32. 30. The apparatus of claim 29, wherein the passive vibration member includes one or more of a display panel having pixels for displaying 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, an interior material of a vehicle, an exterior material of a vehicle, a glass window of a vehicle, a seat interior material of a vehicle, a ceiling material of a building, an interior material of a building, a glass window of a building, an interior material of an aircraft, a glass window of an aircraft, and a mirror.

33. A passive vibration member; A connecting member; a vibration generating device connected to the passive vibration member by the connecting member and configured to vibrate the passive vibration member; The vibration generating device comprises a vibration device according to any one of claims 1 to 28.

34. The connecting member is connected between the passive vibration member and a center portion of the vibration generating device, 34. The device of claim 33, wherein an edge portion of the vibration generating device is not connected to the connecting member and / or the passive vibration member, and is floating away from each of the connecting member and the passive vibration member.

35. The connecting member includes a material including an adhesive layer, 34. The apparatus of claim 33, wherein the coupling member is coupled or glued to the entire front surface of the vibration-generating device and to a rear surface of the passive vibration member.

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