Vibrating device, device comprising the vibrating device and device for vibrating

Abstract

A vibration device, a device including the vibration device, and a device for vibration are disclosed. The vibration device can include a vibration generation portion including a first vibration portion and a second vibration portion overlapping the first vibration portion, a first cover member at a first surface of the vibration generation portion, a second cover member at a second surface different from the first surface of the vibration generation portion, and a signal cable including a first signal line, a second signal line, and a third signal line connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member. The device for vibration can include a passive vibration member and the vibration device.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit and priority of Korean Patent Application No. 10-2021-0194787, filed on December 31, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to apparatuses, and particularly to, for example (but not limited to) vibration devices and apparatuses including such vibration devices. Background Technology

[0004] Recently, there has been an increasing demand for thinner and more compact electronic devices. Furthermore, since loudspeakers used in electronic devices require thinner and more compact designs, the replacement of voice coils with thinner piezoelectric elements has attracted considerable attention.

[0005] A loudspeaker or vibrating device that uses piezoelectric elements can be driven or vibrated by driving power or driving signals supplied through signal cables.

[0006] A typical vibration device (or membrane actuator) includes a membrane comprising pad electrodes and wires for applying driving power to a piezoelectric element. Typical vibration devices require a process of patterning the wires and pad electrodes on the membrane, as well as a soldering process for electrically connecting the pad electrodes to signal cables.

[0007] The descriptions provided in the background section should not be construed as prior art simply because they are mentioned or associated with in this section. The background section may include information describing one or more aspects of the subject matter art, and the descriptions in this section do not limit the invention. Summary of the Invention

[0008] The inventors have recognized the problems described above, as well as the problems and deficiencies of the prior art, and have conducted various experiments to realize the vibration device, which can simplify the manufacturing process and structure of the vibration device. Through extensive research and experimentation, the inventors have invented a vibration device with a new structure and an apparatus including the vibration device, which can simplify the manufacturing process and structure of the vibration device.

[0009] One or more aspects of this disclosure are intended to provide a vibration device and an apparatus including the vibration device, wherein the manufacturing process and structure can be simplified.

[0010] One or more aspects of this disclosure are intended to provide a vibration device and a means including the vibration device, wherein sound characteristics can be enhanced.

[0011] Therefore, one or more exemplary embodiments of this disclosure relate to apparatuses that substantially eliminate one or more problems caused by the limitations and disadvantages of the prior art.

[0012] Additional features, advantages, and aspects will be set forth in part in the description which follows, and in part will be obvious from this disclosure, or may be learned by practicing the inventive concept provided herein. Other features, advantages, and aspects of the inventive concept may be realized or derived therefrom from the description provided in this disclosure and from the claims and drawings.

[0013] To achieve these and other advantages and aspects of this disclosure, as embodied and broadly described herein, in one or more aspects, a vibration device includes: a vibration generating portion including a first vibration portion and a second vibration portion overlapping the first vibration portion; a first cover member at a first surface of the vibration generating portion; a second cover member at a second surface different from the first surface; and a signal cable including a first signal line, a second signal line, and a third signal line connected to the first vibration portion and the second vibration portion and disposed between the first cover member and the second cover member.

[0014] In one or more aspects, an apparatus includes: a passive vibration member; and a vibration generating device connected to the passive vibration member and configured to include a vibration device to vibrate the passive vibration member. The vibration device may include: a vibration generating section including a first vibration section and a second vibration section overlapping the first vibration section; a first cover member at a first surface of the vibration generating section; a second cover member at a second surface different from the first surface; and a signal cable including a first signal line, a second signal line, and a third signal line connected to the first and second vibration sections and disposed between the first and second cover members.

[0015] According to one or more exemplary embodiments of this disclosure, a vibration device and an apparatus including the vibration device can be provided, wherein the manufacturing process and structure of the vibration device can be simplified.

[0016] According to one or more exemplary embodiments of this disclosure, a vibration device and an apparatus including the vibration device may be provided, wherein the reduction of sound characteristics can be minimized despite the use of electrodes with high surface resistance.

[0017] Other systems, methods, features, and advantages will be or will become apparent to those skilled in the art upon examination of the following drawings and detailed description. All such additional systems, methods, features, and advantages are intended to be included in this description, within the scope of this disclosure, and protected by the appended claims. Nothing in this section should be construed as limiting these claims. Other aspects and advantages are discussed below in conjunction with various aspects of this disclosure.

[0018] It should be understood that both the prior description of this disclosure and the following description are exemplary and illustrative, and are intended to provide further explanation of the claimed disclosure. Attached Figure Description

[0019] The accompanying drawings are included to provide a further understanding of this disclosure and are incorporated in and constitute a part of this disclosure. The drawings illustrate various aspects and implementations of this disclosure and, together with the description, serve to illustrate the principles of this disclosure.

[0020] Figure 1 A vibration device according to a first exemplary embodiment of the present disclosure is shown.

[0021] Figure 2 It is along Figure 1 The example shown is a cross-sectional view taken by line A-A'.

[0022] Figure 3 It is along Figure 1 The example shown is a cross-sectional view taken by line B-B'.

[0023] Figure 4 It is shown Figures 1 to 3 An example perspective view of the connection structure between the signal cable and the vibration generating unit.

[0024] Figure 5 It is along Figure 1 An example of another cross-sectional view taken from line A-A'.

[0025] Figure 6 It is shown Figure 5 An example of a perspective view of the vibration generating section shown.

[0026] Figure 7 It shows the setting Figure 5 and Figure 6 An example of a perspective view of the adhesive component at the first vibrating section.

[0027] Figure 8 A first vibrating part in a vibration device according to a third exemplary embodiment of the present disclosure is shown.

[0028] Figure 9A vibration device according to a fourth exemplary embodiment of the present disclosure is shown.

[0029] Figure 10 It is along Figure 9 The example shown is a cross-sectional view taken by line C-C'.

[0030] Figure 11 A vibration device according to a fifth exemplary embodiment of the present disclosure is shown.

[0031] Figure 12 It is shown Figure 11 An example perspective view of the connection structure between the vibration generating unit and the signal line of the signal cable.

[0032] Figures 13A to 13C An adhesive layer of a vibration device according to a sixth exemplary embodiment of the present disclosure is shown.

[0033] Figure 14 It is along Figure 1 An example of another cross-sectional view taken from line A-A'.

[0034] Figure 15 It shows Figure 14 An example of a vibration generating section is shown.

[0035] Figure 16 A vibration device according to an eighth exemplary embodiment of the present disclosure is shown.

[0036] Figure 17 It is shown Figure 16 An example of an exploded perspective view of the vibration generating section is shown.

[0037] Figure 18 It is along Figure 16 The example shown is a cross-sectional view taken by line D-D'.

[0038] Figure 19 It is shown Figure 16 An example perspective view of the connection structure between the signal cable and the vibration generating unit.

[0039] Figure 20 A vibration device according to a ninth exemplary embodiment of the present disclosure is shown.

[0040] Figure 21 It is along Figure 20 The example shown is a cross-sectional view taken by line E-E'.

[0041] Figure 22 It is shown Figure 21 An example of an exploded perspective view of the vibration generating section is shown.

[0042] Figure 23It is shown Figure 20 An example perspective view of the connection structure between the signal cable and the vibration generating unit.

[0043] Figure 24 An apparatus according to an exemplary embodiment of the present disclosure is shown.

[0044] Figure 25 It is along Figure 24 The example shown is a cross-sectional view taken by line F-F'.

[0045] Throughout the accompanying drawings and detailed description, unless otherwise described, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustration, and convenience, the size, length, and layers, regions, and thickness of these elements, and their descriptions, may be exaggerated. Detailed Implementation

[0046] Reference will now be made to embodiments of this disclosure in detail, examples of which are illustrated in the accompanying drawings. In the following description, detailed descriptions of well-known functions or configurations may be omitted for brevity where such obscurity would unnecessarily obscure aspects of this disclosure. The described progression of processing steps and / or operations is exemplary; however, the order of steps and / or operations is not limited to the order set forth herein and may be modified, except for steps and / or operations that must occur in a specific order.

[0047] Unless otherwise stated, similar reference numerals may refer to similar elements even if they are shown in different figures. In one or more aspects, unless otherwise stated, the same element (or element with the same name) in different figures may have the same or substantially the same function and characteristics. The names of the various elements used in the following description are chosen for convenience only and may therefore differ from those used in actual products.

[0048] The advantages and features of this disclosure and its implementation methods are illustrated by referring to the accompanying drawings. However, this disclosure may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0049] The shapes, sizes, areas, proportions, angles, and numbers disclosed in the accompanying drawings to describe embodiments of this disclosure are merely examples, and therefore, this disclosure is not limited to the details shown.

[0050] When terms such as “comprising,” “having,” “including,” “containing,” “constituting,” “composed of,” “formed from,” etc., are used, one or more additional elements may be added unless a term such as “only” is used. The terminology used in this disclosure is only used to describe particular implementations and is not intended to limit the scope of this disclosure. The terminology used herein is only used to describe exemplary implementations and is not intended to limit the scope of this disclosure. Unless the context clearly indicates otherwise, singular terms may include plural forms. The word “exemplary” is used to indicate that it is used as an example or illustration. Implementations are exemplary implementations. Aspects are exemplary aspects. Any implementation described herein as an “example” is not necessarily to be construed as preferred or advantageous relative to other implementations.

[0051] In one or more aspects, a component, feature, or corresponding information (e.g., level, range, dimension, size, etc.) is interpreted as including a range of errors or tolerances, even if no explicit description of such a range of errors or tolerances is provided. Ranges of errors or tolerances can be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). Furthermore, the term "may" encompasses the full meaning of the term "able to".

[0052] When describing positional relationships, for example, when using terms such as "on," "above," "below," "above," "below," "below," "near," "close to," or "adjacent," "beside," or "next to" to describe the positional relationship between two parts, one or more other parts may be located between these two parts, unless more restrictive terms such as "immediately," "directly," or "closely" are used. For example, when a structure is described as being positioned relative to another structure as "on," "above," "below," "above," "below," "near," "close to," or "adjacent," "beside," or "next to," this description should be interpreted to include situations where the structures are in contact with each other and where one or more additional structures are set or inserted between them. Furthermore, the terms "front," "back," "behind," "left," "right," "top," "bottom," "down," "up," "high," "low," "up," "column," "row," "vertical," "horizontal," etc., refer to any frame of reference.

[0053] When describing temporal relationships, where the temporal order is described as such as "after", "following", "next", "before", "in the first place", "before", etc., it may include incoherent or non-sequential situations, unless more restrictive terms such as "only", "immediately", "directly" are used.

[0054] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, a first element may be a second element, and similarly, a second element may be a first element, without departing from the scope of this disclosure. Furthermore, first elements, second elements, etc., may be arbitrarily named as convenient for those skilled in the art without departing from the scope of this disclosure. The terms "first," "second," etc., may be used to distinguish components from each other, but the function and structure of each component are not limited to the number preceding the component or the component name.

[0055] In describing elements of this disclosure, the terms “first,” “second,” “A,” “B,” “(a),” “(b),” etc., may be used. These terms are intended to distinguish one or more corresponding elements from one or more other elements, and the nature, basis, order, or number of elements shall not be limited by these terms.

[0056] The description of an element or layer being “connected,” “coupled,” or “adheded” to another element or layer means that the element or layer may be directly connected, coupled, or adhered to another element or layer, or indirectly connected, coupled, or adhered to another element or layer, with one or more intermediate elements or layers disposed or inserted between the elements or layers, unless otherwise stated.

[0057] When a component or layer is described as "in contact" or "overlapping" with another component or layer, the component or layer may not only be in direct contact or overlap with another component or layer, but may also be indirect contact or overlap with another component or layer, with one or more intermediate components or layers disposed or inserted between the components or layers, unless otherwise specified.

[0058] The term "at least one" should be understood to include any and all combinations of one or more associated enumerated items. For example, "at least one of the first, second, and third items" means a combination of items derived from two or more of the first, second, and third items, as well as only one of the first, second, or third items.

[0059] The expressions "first element," "second element," and " / or" "third element" should be understood as one of the first element, the second element, and the third element, or any or all combinations of the first element, the second element, and the third element. By way of example, A, B, and / or C can refer to only A; only B; only C; any or some combinations of A, B, and C; or all of A, B, and C. Furthermore, the expression "element A / element B" can be understood as element A and / or element B.

[0060] In one or more aspects, unless otherwise stated, the terms "between" and "among" may be used interchangeably for convenience only. For example, the expression "between multiple elements" can be understood as "among multiple elements." In another example, the expression "among multiple elements" can be understood as "between multiple elements." In one or more examples, the number of elements may be two. In one or more examples, the number of elements may be more than two.

[0061] In one or more aspects, unless otherwise stated, the phrases “each other” and “one another” may be used interchangeably for convenience only. For example, the expression “different from each other” can be understood as “different from each other”. In another example, the expression “different from each other” can be understood as “different from each other”. In one or more examples, the number of elements involved in the above expression may be two. In one or more examples, the number of elements involved in the above expression may be more than two.

[0062] In one or more respects, unless otherwise stated, the phrases “one or more of…” and “one or more of…” may be used interchangeably for convenience only.

[0063] Features of the various embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may interoperate with, be linked or driven together in various ways. Embodiments of this disclosure may be performed independently of each other, or may be performed together in a dependent or related relationship. In one or more aspects, components of each apparatus according to the various embodiments of this disclosure are effectively coupled or configured.

[0064] Unless otherwise defined, the terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. It should also be understood that terms as defined in common dictionaries shall be interpreted as having a meaning consistent, for example, with that in the relevant technical context, and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0065] In the following, various exemplary embodiments of the present disclosure are described in detail with reference to the accompanying drawings. Furthermore, for ease of description, the scale, dimensions, size, and thickness of each element shown in the drawings differ from actual scale, dimensions, size, and thickness, and therefore, embodiments of the present disclosure are not limited to the scale, dimensions, size, and thickness shown in the drawings.

[0066] Figure 1 A vibration device according to a first exemplary embodiment of the present disclosure is shown. Figure 2 It is along Figure 1 The example shown is a cross-sectional view taken by line A-A'. Figure 3 It is along Figure 1 The example shown is a cross-sectional view taken by line B-B'. Figure 4 It is shown Figures 1 to 3 An example perspective view of the connection structure between the signal cable and the vibration generating unit.

[0067] Reference Figures 1 to 4 The vibration device according to the first exemplary embodiment of the present disclosure may include a vibration generating unit 10, a first cover member 30, a second cover member 50, and a signal cable 90.

[0068] The vibration generating unit 10 may include a plurality of vibration units 10A and 10B that overlap or superimpose on each other. For example, the vibration generating unit 10 may include a plurality of vibration units 10A and 10B that are stacked or superimposed on each other. For example, the vibration generating unit 10 may include a first vibration unit 10A and a second vibration unit 10B stacked on the first vibration unit 10A.

[0069] Multiple vibrating parts 10A and 10B, or a first vibrating part 10A and a second vibrating part 10B, can be connected or in contact with each other. For example, multiple vibrating parts 10A and 10B, or a first vibrating part 10A and a second vibrating part 10B, can be connected or in contact with each other without an intermediate medium such as a connecting member or a contact member. Multiple vibrating parts 10A and 10B, or a first vibrating part 10A and a second vibrating part 10B, can be directly connected or in direct contact with each other. For example, multiple vibrating parts 10A and 10B, or a first vibrating part 10A and a second vibrating part 10B, can be directly connected or in direct contact with each other without an intermediate medium such as a connecting member or a contact member. For ease of description, reference will be made to... Figures 1 to 4 An example is described for the vibration generating unit 10, which includes a first vibration unit 10A and a second vibration unit 10B.

[0070] Each of the first vibrating part 10A and the second vibrating part 10B may include a piezoelectric material (or electroactive material) or a piezoelectric element that incorporates the piezoelectric effect. For example, the piezoelectric material (or piezoelectric element) may have the characteristic that when pressure or torsion is applied to the crystal structure by an external force, a potential difference arises due to dielectric polarization caused by the change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field based on the reverse voltage applied thereto.

[0071] Each of the first vibration section 10A and the second vibration section 10B may include a vibration layer 11, a first electrode layer 13, and a second electrode layer 15.

[0072] The vibrating layer 11 may include a piezoelectric material (or an electroactive material) that incorporates the piezoelectric effect. The vibrating layer 11 may include a ceramic-based material capable of achieving relatively high vibrations, or may include a piezoelectric ceramic having a perovskite-based crystal structure.

[0073] Piezoelectric ceramics may include single-crystal ceramics with a crystalline structure, or may include ceramic materials or polycrystalline ceramics with a polycrystalline structure. Piezoelectric materials including single-crystal ceramics may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO, but embodiments of this disclosure are not limited thereto. Piezoelectric materials including polycrystalline ceramics may include lead zirconate titanate (PZT)-based materials containing lead (Pb), zirconium (Zr), and titanium (Ti), or may include lead nickel zirconate niobate (PZNN)-based materials containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but embodiments of this disclosure are not limited thereto. Alternatively, the resonant layer 11 may include at least one or more of calcium titanate (CaTiO3), BaTiO3, and SrTiO3, all of which are lead-free (Pb), but embodiments of this disclosure are not limited thereto.

[0074] According to exemplary embodiments of this disclosure, the vibration layer 11 of each of the first vibration section 10A and the second vibration section 10B may have the same ceramic crystal structure or may have different ceramic structures. For example, each of the vibration layer 11 of the first vibration section 10A and the second vibration layer 11 of the second vibration section 10B may include monocrystalline ceramic or polycrystalline ceramic. For example, any one of the vibration layer 11 of the first vibration section 10A and the second vibration layer 11 of the second vibration section 10B may include monocrystalline ceramic, while the other may include polycrystalline ceramic.

[0075] The first electrode layer 13 may be disposed on the first surface (or lower surface) of the vibration layer 11. The first electrode layer 13 may have the same size as the vibration layer 11, or it may have a smaller size than the vibration layer 11.

[0076] The second electrode layer 15 may be disposed on a second surface (or above) that is opposite to or different from the first surface of the vibration layer 11. The second electrode layer 15 may have the same size as the vibration layer 11, or it may have a smaller size than the vibration layer 11. For example, the second electrode layer 15 may have the same shape as the vibration layer 11, but the embodiments of this disclosure are not limited thereto.

[0077] In the stacked structure of the first vibrating section 10A and the second vibrating section 10B, to prevent electrical short circuits between vertically adjacent electrode layers, each of the first electrode layer 13 and the second electrode layer 15 may be formed on a portion of the vibrating layer 11 other than its peripheral portion. For example, the distance between the side surface (or sidewall) of each of the first electrode layer 13 and the second electrode layer 15 and the side surface (or sidewall) of the vibrating layer 11 may be at least 0.5 mm or greater. For example, the distance between the side surface 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 greater, but the embodiments of this disclosure are not limited thereto.

[0078] According to exemplary embodiments of this disclosure, one or more of the first electrode layer 13 and the second electrode layer 15 may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but embodiments of this disclosure are not limited thereto. The opaque conductive material may include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) including glass frit, or may be formed of alloys thereof, but embodiments of this disclosure are not limited thereto. According to another exemplary embodiment of this disclosure, to improve the electrical and / or vibrational properties of the vibration layer 11, each of the first electrode layer 13 and the second electrode layer 15 may include silver (Ag) with low resistivity. For example, carbon may be carbon black, Ketjen black, carbon nanotubes, and carbon materials including graphite, but embodiments of this disclosure are not limited thereto.

[0079] In the first electrode layer 13 and the second electrode layer 15, which include silver (Ag) containing glass frit, the content of glass frit can be from 1 wt% to 12 wt%, but the embodiments of this disclosure are not limited thereto. The glass frit may include materials based on PbO or Bi2O3, but the embodiments of this disclosure are not limited thereto.

[0080] According to exemplary embodiments of this disclosure, the second electrode layer 15 of the first vibration unit 10A can be electrically contacted or electrically connected to the first electrode layer 13 of the second vibration unit 10B. For example, the second electrode layer 15 of the first vibration unit 10A can directly contact or directly connect to the first electrode layer 13 of the second vibration unit 10B. For example, the second electrode layer 15 of the first vibration unit 10A can be directly connected to or directly electrically contacted with the first electrode layer 13 of the second vibration unit 10B without an intermediate medium such as a connecting member or a contact member. Therefore, the second electrode layer 15 of the first vibration unit 10A and the first electrode layer 13 of the second vibration unit 10B can be the third electrode layer, intermediate electrode layer, inner electrode layer, and common electrode layer of the vibration generating unit 10, but the embodiments of this disclosure are not limited thereto.

[0081] The vibrating layer 11 can be polarized (or polarized) by applying a certain voltage to the first electrode layer 13 and the second electrode layer 15, in a certain temperature atmosphere, or in a temperature atmosphere that can be changed from high temperature to room temperature, but the embodiments of this disclosure are not limited to this. For example, the vibrating layer 11 can alternately and repeatedly contract or expand to vibrate based on the inverse piezoelectric effect according to the sound signal (or voice signal or drive signal) applied to the first electrode layer 13 and the second electrode layer 15 from the outside. For example, the vibrating layer 11 can vibrate based on the vertical vibration and planar vibration of the sound signal applied to the first electrode layer 13 and the second electrode layer 15. The vibrating layer 11 can increase the displacement of the vibrating member by contracting and / or expanding in the planar direction, thereby further improving the vibration of the vibrating member.

[0082] The vibration layer 11 of the first vibration unit 10A and the vibration layer 11 of the second vibration unit 10B can be polarized in the same direction or in opposite directions. For example, the polarization direction formed in the vibration layer 11 of the first vibration unit 10A can be the opposite direction to the polarization direction formed in the vibration layer 11 of the second vibration unit 10B. According to an exemplary embodiment of the present disclosure, the second electrode layer 15 of the first vibration unit 10A can be connected to the first electrode layer 13 of the second vibration unit 10B. Therefore, when the polarization direction formed in the vibration layer 11 of the first vibration unit 10A is the opposite direction to the polarization direction formed in the vibration layer 11 of the second vibration unit 10B, the first vibration unit 10A and the second vibration unit 10B can be displaced (or vibrated or driven) in the same direction. As a result, the vibration width (or displacement width) of the vibration generating unit 10 can be maximized, and thus the sound pressure level can be enhanced.

[0083] According to an exemplary embodiment of this disclosure, either the first vibrating part 10A or the second vibrating part 10B can be configured to expose a portion of the other vibrating part. Either the first vibrating part 10A or the second vibrating part 10B can be configured to expose a portion (or a part thereof) of the other vibrating part toward the second cover member 50.

[0084] The vibration device or vibration generating unit 10 according to the first exemplary embodiment of the present disclosure may also include a cut portion 16 implemented in either the first vibration unit 10A or the second vibration unit 10B.

[0085] Either the first vibration section 10A or the second vibration section 10B may include a cut portion 16. The cut portion 16 may be implemented in either the first vibration section 10A or the second vibration section 10B to expose a portion of the third electrode layer (or inner electrode) of the vibration generating section 10. For example, the cut portion 16 may be implemented by cutting or chamfering a portion of either the first vibration section 10A or the second vibration section 10B. For example, the cut portion 16 may be implemented as one or more of a straight shape and a curved shape. For example, the cut portion 16 may be a chamfered portion, a rounded portion, an exposed inner electrode portion, an exposed common electrode portion, an exposed intermediate electrode portion, or an exposed inner portion, but embodiments of this disclosure are not limited thereto.

[0086] According to exemplary embodiments of this disclosure, since either the first vibrating part 10A or the second vibrating part 10B includes a cutout portion 16, the first vibrating part 10A and the second vibrating part 10B can have different shapes. For example, either the first vibrating part 10A or the second vibrating part 10B can include four sides, while the other can include five or more sides. For example, either the first vibrating part 10A or the second vibrating part 10B can have a quadrilateral shape or a rectangular shape including four sides, while the other can have a pentagonal shape including four corners, with one corner portion cut off or chamfered. However, embodiments of this disclosure are not limited to these.

[0087] The cutout portion 16 according to an exemplary embodiment of the present disclosure can be implemented to expose a portion of the third electrode layer (or inner electrode) of the vibration generating portion 10.

[0088] The second vibration section 10B according to an exemplary embodiment of this disclosure may include a cut portion 16 for exposing a portion (or a part) of the region of the first vibration section 10A. For example, the second vibration section 10B may include a cut portion 16 for exposing a portion of the region of the first vibration section 10A toward the second cover member 50. For example, the second vibration section 10B may include a cut portion 16 for exposing the electrode layer of the first electrode layer 13 and the second electrode layer 15 of the first vibration section 10A that is disposed closer to the second cover member 50 toward the second cover member 50.

[0089] The cut portion 16 can be achieved by removing a portion of the area of ​​the second vibrating part 10B, so that the electrode layers of the first electrode layer 13 and the second electrode layer 15 of the first vibrating part 10A, which are disposed closer to the second cover member 50, are exposed. For example, the cut portion 16 can be achieved by cutting or chamfering the first corner of the four corners of the second vibrating part 10B. For example, the cut portion 16 can be implemented in one or more of a straight shape and a curved shape.

[0090] According to an exemplary embodiment of this disclosure, the first vibrating part 10A can be exposed through the cutout portion 16 of the second vibrating part 10B. For example, the first vibrating part 10A can be exposed through the cutout portion 16 of the second vibrating part 10B to face the second cover member 50. For example, the electrode layer of the first electrode layer 13 and the second electrode layer 15 of the first vibrating part 10A that is disposed closer to the second cover member 50 can face the second cover member 50 through the cutout portion 16 of the second vibrating part 10B. For example, the second electrode layer 15 of the first vibrating part 10A can face or be exposed at the second cover member 50 through the cutout portion 16 of the second vibrating part 10B.

[0091] The first cover member 30 may be disposed on the first surface of the vibration generating section 10. For example, the first cover member 30 may be configured to cover the first vibration section 10A of the vibration generating section 10. For example, the first cover member 30 may be configured to cover the first electrode layer 13 of the first vibration section 10A. Therefore, the first cover member 30 may protect the first surface of the vibration generating section 10 or the first vibration section 10A. For example, the first cover member 30 may be configured to cover the electrode layer of the first electrode layer 13 and the second electrode layer 15 that is away from the second vibration section 10B. For example, the first cover member 30 may protect the first surface of the vibration generating section 10 and the first electrode layer 13 of the first vibration section 10A.

[0092] The second cover member 50 may be disposed on the second surface of the vibration generating portion 10. For example, the second cover member 50 may be configured to cover the second vibration portion 10B of the vibration generating portion 10. For example, the second cover member 50 may be configured to cover the second electrode layer 15 of the second vibration portion 10B. Therefore, the second cover member 50 may protect the second surface of the vibration generating portion 10 or the second vibration portion 10B. For example, the second cover member 50 may be configured to cover the electrode layers of the first electrode layer 13 and the second electrode layer 15 of the second vibration portion 10B that are away from the first vibration portion 10A. For example, the second cover member 50 may protect the second surface of the vibration generating portion 10 and the second electrode layer 15 of the second vibration portion 10B, and may also protect the exposed area 15a of the first vibration portion 10A exposed by the cut portion 16.

[0093] Each of the first cover member 30 and the second cover member 50 according to exemplary embodiments of this disclosure may comprise one or more materials selected from plastic, fiber, cloth, paper, leather, rubber, and wood; however, embodiments of this disclosure are not limited thereto. For example, each of the first cover member 30 and the second cover member 50 may comprise the same material or different materials. For example, each of the first cover member 30 and the second cover member 50 may be a polyimide (PI) film or a polyethylene terephthalate (PET) film; however, embodiments of this disclosure are not limited thereto.

[0094] One or more of the first cover member 30 and the second cover member 50 according to another exemplary embodiment of this disclosure 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 coupled or attached to the vibrating portions 10A and 10B, and a protective member (or peeling member or delamination member) covering or protecting the adhesive member. For example, the adhesive member may include an electrically insulating material having adhesive properties and capable of compression and decompression. For example, the first cover member 30 may include an adhesive member coupled or attached to the vibrating portions 10A and 10B, and a protective member (or peeling member) covering or protecting the adhesive member.

[0095] The first cover member 30 can be connected or coupled to at least a portion of the first surface of the vibration generating part 10 or the first electrode layer 13 of the first vibration part 10A via the first adhesive layer 41. For example, the first cover member 30 can be connected or coupled to at least a portion of the first surface of the vibration generating part 10 or the first electrode layer 13 of the first vibration part 10A via a film lamination process using the first adhesive layer 41.

[0096] The second cover member 50 can be connected or coupled to at least a portion of the second surface of the vibration generating part 10 or the second electrode layer 15 of the second vibration part 10B via the second adhesive layer 42. For example, the second cover member 50 can be connected or coupled to at least a portion of the second surface of the vibration generating part 10 or the second electrode layer 15 of the second vibration part 10B via a film lamination process using the second adhesive layer 42.

[0097] Each of the first adhesive layer 41 and the second adhesive layer 42 according to exemplary embodiments of this disclosure may include an electrically insulating material that is adhesive and capable of compression and decompression. 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 polyurethane resin, but embodiments of this disclosure are not limited thereto.

[0098] The signal cable 90 can be implemented to be connected to each of the first vibration part 10A and the second vibration part 10B of the vibration generating part 10 at one side of the vibration generating part 10. The signal cable 90 can be connected between the first cover member 30 and the second cover member 50 to each of the first vibration part 10A and the second vibration part 10B.

[0099] The end portion (or distal portion) of the signal cable 90 may be disposed or inserted in the area (or portion) between a peripheral portion EP of the first cover member 30 and a peripheral portion EP of the second cover member 50. A peripheral portion EP of the first cover member 30 and a peripheral portion EP of the second cover member 50 may accommodate a portion of the signal cable 90, or may vertically cover a portion of the signal cable 90. Therefore, the signal cable 90 may be integrated with the vibration generating unit 10, or may be configured to be integrally formed with the vibration generating unit 10. For example, the vibration device according to the first exemplary embodiment of this disclosure may be a vibration device integrated with or configured to be integrally formed with the signal cable 90. For example, the signal cable 90 may be a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, but embodiments of this disclosure are not limited thereto.

[0100] A signal cable 90 according to an exemplary embodiment of this disclosure may include (or may be) a base member 91 and a plurality of signal lines 92a, 92b and 92c. For example, the signal cable 90 may include a base member 91 and first, second and third signal lines 92a, 92b and 92c.

[0101] The base component 91 may comprise a transparent or opaque plastic material. For example, the base component 91 may be made of any one or more synthetic resins including fluoropolymers, polyimide resins, polyurethane resins, polyester resins, polyethylene resins, and polypropylene resins, but the embodiments are not limited thereto. The base component 91 may be a base film or a base insulating film, but the embodiments are not limited thereto.

[0102] The base member 91 may have a certain width in the first direction X and may extend a long distance along the second direction Y that intersects with the first direction X.

[0103] Each of the first, second, and third signal lines (or multiple signal lines) 92a, 92b, and 92c can be disposed parallel to the second direction Y on the first surface of the base member 91, and can be spaced apart or separated from each other along the first direction X. Each of the first, second, and third signal lines (or multiple signal lines) 92a, 92b, and 92c can be disposed parallel to each other on the first surface of the base member 91. For example, each of the first, second, and third signal lines (or multiple signal lines) 92a, 92b, and 92c can be implemented as a line by patterning a metal layer (or conductive layer) formed or deposited on the first surface of the base member 91.

[0104] The end portions (or distal portions) of each of the first, second, and third signal lines 92a, 92b, and 92c may be spaced apart from each other and therefore may be bent or folded individually.

[0105] The end portion (or distal portion) of the first signal line 92a can be electrically connected to the electrode layers of the first electrode layer 13 and the second electrode layer 15 of the first vibrating part 10A near the first cover member 30. For example, the end portion of the first signal line 92a can be electrically connected at a peripheral portion EP of the first cover member 30 to at least a portion of the first electrode layer 13 of the first vibrating part 10A. For example, the end portion of the first signal line 92a can be directly electrically connected to at least a portion of the first electrode layer 13 of the first vibrating part 10A. The end portion of the first signal line 92a can be directly connected to or directly contact the first electrode layer 13 of the first vibrating part 10A. Therefore, the first signal line 92a can supply a first drive signal supplied from the vibration drive circuit to the first electrode layer 13 of the first vibrating part 10A.

[0106] The end portion (or distal portion) of the second signal line 92b can be electrically connected to the electrode layers of the first electrode layer 13 and the second electrode layer 15 of the second vibrating part 10B near the second cover member 50. For example, the end portion of the second signal line 92b can be electrically connected at a peripheral portion EP of the second cover member 50 to at least a portion of the second electrode layer 15 of the second vibrating part 10B. For example, the end portion of the second signal line 92b can be directly electrically connected to at least a portion of the second electrode layer 15 of the second vibrating part 10B. The end portion of the second signal line 92b can be directly connected to or directly contact the second electrode layer 15 of the second vibrating part 10B. Therefore, the second signal line 92b can supply a second drive signal supplied from the vibration drive circuit to the second electrode layer 15 of the second vibrating part 10B. For example, the second drive signal can have the same phase as the first drive signal.

[0107] The end portion (or distal portion) of the third signal line 92c can be electrically connected at the cutout portion 16 implemented in the second vibration section 10B to the electrode layer of the first electrode layer 13 and the second electrode layer 15 of the first vibration section 10A near the second cover member 50. For example, the end portion of the third signal line 92c can be electrically connected at a peripheral portion EP of the second cover member 50 to at least a portion of the second electrode layer 15 of the first vibration section 10A. For example, the end portion of the third signal line 92c can be electrically connected to at least a portion of the exposed area 15a of the second electrode layer 15 of the first vibration section 10A exposed by the cutout portion 16 of the second vibration section 10B. For example, the end portion of the third signal line 92c can be directly connected to or directly contact the second electrode layer 15 of the first vibration section 10A. Therefore, the third signal line 92c can supply a third driving signal from the vibration driving circuit to the second electrode layer 15 of the first vibration section 10A. Therefore, the third driving signal can be supplied to the first electrode layer 13 of the second vibration section 10B through the second electrode layer 15 of the first vibration section 10A. For example, the third driving signal may have a phase opposite to that of the first driving signal or the second driving signal.

[0108] In the first vibration unit 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. Therefore, the first vibration unit 10A can vibrate (or displace or drive) based on the inverse piezoelectric effect that occurs in the vibration layer 11 by alternating and repeating contraction and expansion, according to the first driving signal and the third driving signal.

[0109] In the second vibration section 10B, the first electrode layer 13 can receive a third driving signal via the third signal line 92c and the second electrode layer 15 of the first vibration section 10A, and the second electrode layer 15 can receive a second driving signal via the second signal line 92b. Therefore, the second vibration section 10B can vibrate (or displace or drive) based on the inverse piezoelectric effect appearing in the vibration layer 11 by alternating and repeating contraction and expansion according to the second and third driving signals.

[0110] Each of the first vibrating part 10A and the second vibrating part 10B can be buckled (or displaced or driven) in the same shape. Therefore, in the vibration generating part 10 or the vibration device, the vibration width (or displacement width) of the first vibrating part 10A and the vibration width (or displacement width) of the second vibrating part 10B can be added together 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 can be enhanced, and thus the vibration efficiency or vibration characteristics can be enhanced, and the vibration width (or displacement width) can be maximized, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords.

[0111] The signal cable 90 according to an exemplary embodiment of this disclosure may also include an insulating member 93.

[0112] The insulating member 93 may be disposed on the first surface of the base member 91 to cover each of the first, second, and third signal lines 92a, 92b, and 92c, excluding 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 film, a cover film, or a cover insulating film, but the implementation is not limited thereto.

[0113] The signal cable 90 or base member 91 may include a first extension 91a that supports an end portion of the first signal line 92a. The first extension 91a may extend along a second direction Y from the end of an insulating member 93 covering the first signal line 92a disposed at the base member 91 and may support the first signal line 92a. The first signal line 92a may be disposed at the top surface (or upper surface) of the first extension 91a for direct connection to the first vibrating part 10A.

[0114] The signal cable 90 or base member 91 may include a second extension portion 91b and a third extension portion 91c that respectively support the end portions of the second signal line 92b and the third signal line 92c. The second extension portion 91b may extend from the end of the base member 91 along the second direction Y and may support the second signal line 92b. The second signal line 92b may be disposed at the bottom surface (or lower surface) of the second extension portion 91b for direct connection to the second vibrating part 10B. The third extension portion 91c may extend from the end of the base member 91 along the second direction Y and may support the third signal line 92c. The third signal line 92c may be disposed at the bottom surface (or lower surface) of the third extension portion 91c for direct connection to the first vibrating part 10A.

[0115] The signal cable 90 may include first, second, and third extensions 91a, 91b, and 91c, which respectively support the end portions of the first, second, and third signal lines 92a, 92b, and 92c that are spaced apart (or separated). For example, the first, second, and third extensions 91a, 91b, and 91c may be spaced apart (or separated) between a peripheral portion EP of the first cover member 30 and a peripheral portion EP of the second cover member 50. Therefore, the end portions (or distal portions) of the first, second, and third signal lines 92a, 92b, and 92c may be spaced apart (or separated) and may be individually bent or folded.

[0116] According to another exemplary embodiment of this disclosure, each of the first, second, and third extension portions 91a, 91b, and 91c of the signal cable 90 or base member 91 may be omitted. For example, each of the first, second, and third signal lines 92a, 92b, and 92c may extend or protrude from the end of the base member 91 in a finger-like shape and may be electrically connected or in contact with each of the corresponding electrode layers 13 and 15 between a peripheral portion EP of the first cover member 30 and a peripheral portion EP of the second cover member 50. For example, the end portions of each of the first, second, and third signal lines 92a, 92b, and 92c may be electrically connected or in contact with each of the corresponding electrode layers 13 and 15 by conductive double-sided adhesive tape, and thus, adhesion to the corresponding electrode layers 13 and 15 can be ensured.

[0117] The end portion (or distal portion) of the signal cable 90 inserted between the first cover member 30 and the second cover member 50 can be inserted or fixed between the first cover member 30 and the second cover member 50 by a film lamination process using a first adhesive layer 41 formed on the first cover member 30 and a second adhesive layer 42 formed on the second cover member 50. Therefore, the first signal line 92a can remain electrically connected to the first electrode layer 13 of the first vibrating part 10A, the second signal line 92b can remain electrically connected to the second electrode layer 15 of the second vibrating part 10B, and the third signal line 92c can remain electrically connected to the second electrode layer 15 of the first vibrating part 10A. Furthermore, the end portion (or distal portion) of the signal cable 90 can be inserted or fixed between the first cover member 30 and the second cover member 50, and thus, contact defects between the vibration generating part 10 and the signal cable 90 caused by movement of the signal cable 90 can be prevented.

[0118] In the vibration device according to the first exemplary embodiment of the present disclosure, the first, second, and third signal lines 92a, 92b, and 92c of the signal cable 90 can be connected to the electrode layer of the vibration generating section 10 between the first cover member 30 and the second cover member 50. Therefore, a welding process for the electrical connection between the vibration generating section 10 and the signal cable 90 is not required, thereby simplifying the structure and manufacturing process. Furthermore, the vibration device according to the first exemplary embodiment of the present disclosure may include a plurality of vibration sections 10A and 10B, which overlap or stack to vibrate (or displace or drive) in the same direction. Therefore, vibration efficiency or vibration characteristics can be enhanced, and the vibration width (or displacement width) can be maximized, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords.

[0119] Figure 5 It is along Figure 1 An example of another cross-sectional view taken from line A-A'. Figure 6 It is shown Figure 5 An example of a perspective view of the vibration generating section shown. Figure 7 It shows the setting Figure 5 and Figure 6 An example of a perspective view of the adhesive component at the first vibrating section. Figures 5 to 7 As shown in the reference above Figures 1 to 4 The exemplary embodiment of the vibration device according to the first exemplary embodiment of this disclosure further includes an adhesive member. Therefore, in Figures 5 to 7 In the description, components other than adhesive components and related elements can be represented by similar reference numerals, and repeated descriptions of them can be omitted for brevity.

[0120] Reference Figures 5 to 7The vibration device or vibration generating unit 10 according to the second exemplary embodiment of this disclosure may also include an adhesive member 17.

[0121] The adhesive component 17 can be configured to enhance the adhesive force between the plurality of vibration portions 10A and 10B disposed in the vibration generating section 10. The adhesive component 17 can be disposed along the peripheral portion between the plurality of vibration portions 10A and 10B. The adhesive component 17 can be formed or disposed in the region (or overlapping region) between the plurality of vibration portions 10A and 10B.

[0122] According to an exemplary embodiment of this disclosure, the adhesive member 17 may be formed or disposed between the peripheral portion of the first vibrating part 10A and the peripheral portion of the second vibrating part 10B. For example, the adhesive member 17 may be formed at the peripheral portion of the first vibrating part 10A that overlaps with the second vibrating part 10B. For example, except for the exposed area 15a of the first vibrating part 10A exposed by the cut portion 16 of the second vibrating part 10B, the adhesive member 17 may surround the side surface (or sidewall) of the first vibrating part 10A (or the second electrode layer 15 of the first vibrating part 10A). For example, the adhesive member 17 may connect or adhere between the peripheral portion of the vibrating layer 11 of the first vibrating part 10A and the peripheral portion of the vibrating layer 11 of the second vibrating part 10B. Therefore, the adhesion between the first vibration part 10A and the second vibration part 10B can be enhanced, and the contact force or adhesion between the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B can be enhanced, and the vibration efficiency or vibration characteristics of each of the first vibration part 10A and the second vibration part 10B can be improved.

[0123] The adhesive component 17 can be spaced apart from the side surface (or sidewall) of the vibrating layer 11 of the first vibrating part 10A, and thus, the adhesive component 17 can be prevented from flowing out (or overflowing) laterally from the first vibrating part 10A and the second vibrating part 10B.

[0124] The adhesive component 17 may include epoxy resin, acrylic resin, silicone resin, or polyurethane resin, but embodiments of this disclosure are not limited thereto. For example, the adhesive component 17 may include an acrylic material (or substance) that has relatively strong adhesion and relatively high hardness compared to acrylic and polyurethane. Therefore, vibrations between the first vibrating part 10A and the second vibrating part 10B can be transmitted well, and thus vibration efficiency or vibration characteristics can be enhanced.

[0125] In the vibration device according to the second exemplary embodiment of the present disclosure, the adhesive force between the first vibration part 10A and the second vibration part 10B can be enhanced by the adhesive member 17, and thus the vibration efficiency or vibration characteristics can be further enhanced.

[0126] Figure 8 A first vibrating part in a vibration device according to a third exemplary embodiment of the present disclosure is shown. Figure 8 It shows how to modify Figures 1 to 7 An exemplary embodiment is shown, implemented using the second electrode layer of the first vibrating part in the vibration device. Therefore, in Figure 8 In the description, other elements besides the second electrode layer of the first vibrating part and related elements can be represented by similar reference numerals, and repeated descriptions of them can be omitted for the sake of brevity.

[0127] Reference Figure 8 , combined Figure 2 and Figure 5 The vibration device according to the third exemplary embodiment of this disclosure can be manufactured or formed by a firing process (or curing process) performed on the electrode layer.

[0128] According to an exemplary embodiment of this disclosure, 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 through a firing process. For example, according to a manufacturing process performed on the vibration 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 can overlap or stack each other in a pre-cured or incompletely cured state, and can then be directly connected to each other through a firing process (or curing process), or can be chemically and / or physically connected or coupled to each other. For example, each of 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 cured or fully cured before the firing process (or 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 firing process.

[0129] According to an exemplary embodiment of this disclosure, the second electrode layer 15 of the first vibrating section 10A may include one or more slits 18. One or more slits 18 may extend from the central portion of the second electrode layer 15 through the side surface (or sidewall) of the second electrode layer 15. One or more slits 18 may serve as pathways for dissipating heat and / or degassing generated during the firing process.

[0130] The vibration device according to the third exemplary embodiment of the present disclosure may include one or more slits 18 formed at the second electrode layer 15 of the first vibration section 10A, and thus degassing that occurs during the firing process can be smoothly discharged, and the stress applied to the vibration layer 11 by the heat of the firing process can be minimized.

[0131] According to another exemplary embodiment of this disclosure, the first electrode layer 13 of the second vibration section 10B may include one or more slits, and even in this case, degassing can be smoothly discharged, and the stress applied to the vibration layer 11 by the heat of the firing process can be minimized. Therefore, the vibration device according to a third exemplary embodiment of this disclosure may include one or more slits formed at one or more of the second electrode layer 15 of the first vibration section 10A and the first electrode layer 13 of the second vibration section 10B, and thus, degassing occurring in the firing process can be smoothly discharged, and the stress applied to the vibration layer 11 by the heat of the firing process can be minimized.

[0132] The vibration device according to the third exemplary embodiment of this disclosure may further include the above-mentioned reference. Figure 7 The adhesive component 17 is described to enhance the adhesive force between the first vibrating part 10A and the second vibrating part 10B, and its repeated description can be omitted for the sake of brevity.

[0133] The adhesive component 17 may include one or more separation portions 17a, which communicate with one or more slits 18 formed at the second electrode layer 15 of the first vibrating section 10A. Therefore, degassing occurring during the firing process can be discharged via the one or more slits 18 formed at the second electrode layer 15 of the first vibrating section 10A and the one or more separation portions 17a formed at the adhesive component 17.

[0134] Figure 9 A vibration device according to a fourth exemplary embodiment of the present disclosure is shown. Figure 10 It is along Figure 9 The example shown is a cross-sectional view taken by line C-C'. In the vibration device according to the fourth exemplary embodiment of the present disclosure, the third signal line can be connected to the vibration generating unit via a line connecting member, and for this reason, the vibration device according to the fourth exemplary embodiment of the present disclosure may differ from the vibration devices according to the first to third exemplary embodiments of the present disclosure. Hereinafter, only the different elements in the vibration device according to the fourth exemplary embodiment of the present disclosure and the vibration devices according to the first to third embodiments of the present disclosure will be described; similar reference numerals may refer to similar elements, and repeated descriptions may be omitted for brevity.

[0135] Reference Figure 9 and Figure 10In the vibration device according to the fourth exemplary embodiment of this disclosure, the wire 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, between the first cover member 30 and the second cover member 50, the wire 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. Therefore, the third drive signal supplied to the third signal line 92c by the vibration drive circuit can be supplied to the second electrode layer 15 of the first vibration part 10A through the wire connection member 80. For example, the wire connection member 80 can increase the contact area between the third signal line 92c and the second electrode layer 15 of the first vibration part 10A.

[0136] The wire connection member 80 may include a conductive double-sided adhesive member. The wire connection member 80 may include conductive double-sided tape, conductive double-sided adhesive pad, or conductive double-sided cushioning tape, but embodiments of this disclosure are not limited thereto. An exemplary embodiment of the wire connection member 80 according to this disclosure may include: a metal layer; a first adhesive layer coupled to a first surface of the metal layer and electrically contacting or connected to a second electrode layer 15 of the first vibrating part 10A; and a second adhesive layer coupled to a second surface of the metal layer and coupled to or attached to a third signal line 92c of the signal cable 90.

[0137] According to exemplary embodiments of this disclosure, the metal layer may include a copper (Cu) material, but embodiments of this disclosure are not limited thereto. Each of the first adhesive layer and the second adhesive layer may include or contain a conductive material.

[0138] The vibration device according to the fourth exemplary embodiment of this disclosure can have the same effect as the vibration device according to the first to third embodiments of this disclosure, or can provide a vibration device with the same effect. Furthermore, by using the wire connection member 80, the supply area of ​​the second drive signal applied to the second electrode layer 15 of the first vibration section 10A can be increased, and the vibration efficiency or vibration characteristics of the vibration generation section 10 can be increased.

[0139] According to another exemplary embodiment of this disclosure, the wire connection member 80 may be connected to or coupled to the second cover member 50, which overlaps with the cut portion 16 of the second vibration part 10B or with the exposed area 15a of the second electrode layer 15 of the first vibration part 10A. In this case, during the lamination process of the vibration device, the wire connection member 80 may be electrically connected to or coupled to the third signal line 92c and the second electrode layer 15 of the first vibration part 10A.

[0140] Figure 11 A vibration device according to a fifth exemplary embodiment of the present disclosure is shown. Figure 12It is shown Figure 11 This is an example of a perspective view of the connection structure between the vibration generating unit and the signal line of the signal cable. In the vibration device according to the fifth embodiment of this disclosure, the cutout portion can be implemented as a groove shape, and for this reason, the vibration device according to the fifth exemplary embodiment of this disclosure may differ from the vibration devices according to the first to fourth exemplary embodiments of this disclosure. Hereinafter, only different elements in the vibration device according to the fifth exemplary embodiment of this disclosure and the vibration devices according to the first to fourth exemplary embodiments of this disclosure will be described; similar reference numerals may refer to similar elements, and repeated descriptions may be omitted for brevity.

[0141] Reference Figure 11 and Figure 12 According to the fifth exemplary embodiment of this disclosure, the vibration device or vibration generating part 10 can be cut such that one side of a peripheral portion of the second vibration part 10B has a predetermined size, and thus can be implemented.

[0142] The cut portion 16 can be recessed from one side at a peripheral portion of the second vibrating portion 10B. For example, the cut portion 16 can be recessed to include one or more of a straight shape and a curved shape. Therefore, the first vibrating portion 10A can have an M-shape or a U-shape in one dimension. For example, the cut portion 16 can be implemented as any of a quadrilateral shape, a semi-circular shape, and an elliptical shape. Therefore, the second electrode layer 15 of the first vibrating portion 10A can face or be exposed at the second cover member 50 through the cut portion 16 of the second vibrating portion 10B.

[0143] The signal cable 90 may include: a first signal line 92a, which is electrically connected to or in direct contact with at least a portion of the first electrode layer 13 of the first vibrating part 10A; a second signal line 92b, which is electrically connected to or in direct contact with at least a portion of the second electrode layer 15 of the second vibrating part 10B; and a third signal line 92c, which is electrically connected to or in direct contact with at least a portion of the second electrode layer 15 of the first vibrating part 10A exposed by the cut portion 16 of the second vibrating part 10B. Except that the positions of the first signal line 92a and the third signal line 92c change based on the position of the cut portion 16, the signal cable 90 may be substantially the same as the signal cable 90 of the vibration device according to the first to fourth embodiments of this disclosure, and therefore, repeated descriptions thereof may be omitted for brevity.

[0144] The vibration device according to the fifth exemplary embodiment of this disclosure may have the same effect as the vibration device according to the first to fourth embodiments of this disclosure, or may provide a vibration device with the same effect. Furthermore, the vibration device according to the fifth exemplary embodiment of this disclosure may include a cutout portion 16 that is recessed from one side of the second vibration unit 10B, and thus, the contact area (or connection area) between the third signal line 92c and the second electrode layer 15 of the first vibration unit 10A is exposed by the cutout portion 16, thereby increasing the vibration efficiency or vibration characteristics of the vibration generation unit 10.

[0145] Figure 13A , Figure 13B and Figure 13C An adhesive layer in a vibration device according to a sixth exemplary embodiment of the present disclosure is shown. In the vibration device according to the sixth exemplary embodiment of the present disclosure, an adhesive layer may be provided between the electrode layer of the first vibration unit and the electrode layer of the second vibration unit, and for this reason, the vibration device according to the sixth exemplary embodiment of the present disclosure may differ from the vibration devices according to the first to fifth exemplary embodiments of the present disclosure. Therefore, in the description... Figure 13A , Figure 13B and Figure 13C In this case, other components besides the adhesive layer and related elements can be represented by similar reference numerals, and repeated descriptions of them can be omitted for the sake of brevity.

[0146] Reference Figure 12 and Figure 13A The vibration device according to the sixth exemplary embodiment of this disclosure may further include an adhesive layer 19.

[0147] According to an exemplary embodiment of this disclosure, the adhesive layer (or inner adhesive layer) 19 may be disposed or formed in a portion (or some regions) of the second electrode layer 15 of the first vibrating portion 10A to have a linear shape. For example, the adhesive layer 19 may include a pair of adhesive lines 19a and 19b disposed in a portion of the second electrode layer 15 of the first vibrating portion 10A.

[0148] A pair of adhesive wires 19a and 19b can be arranged in parallel at two peripheral portions of the second electrode layer 15 of the first vibrating part 10A. For example, the pair of adhesive wires 19a and 19b can be arranged parallel to the second direction Y.

[0149] A pair of adhesive wires 19a and 19b can be disposed or inserted between the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B. Therefore, 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 bonded together by an attachment scheme based on the pair of adhesive wires 19a and 19b, and thus, the vibration efficiency or vibration characteristics of the vibrating device can be increased, thereby increasing the sound pressure level.

[0150] Reference Figure 12 and Figure 13B According to an exemplary embodiment of this disclosure, the adhesive layer (or inner adhesive layer) 19 can be disposed in half of the second electrode layer 15 of the first vibrating part 10A to correspond to half (50%) of the overlapping area (or relative area) of the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B. Therefore, 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 bonded to each other through a surface attachment scheme based on the adhesive layer 19 to further enhance the adhesive force, and thus, the vibration efficiency or vibration characteristics of the vibrating device can be increased, thereby increasing the sound pressure level.

[0151] Reference Figure 12 and Figure 13C According to an exemplary embodiment of this disclosure, an adhesive layer (or inner adhesive layer) 19 can be disposed on the second electrode layer 15 of the first vibrating part 10A to correspond to the entire overlapping area of ​​the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B. For example, the adhesive layer 19 can be formed or disposed in the entire area of ​​the second electrode layer 15 of the first vibrating part 10A, except for the area overlapping with the cutout portion 16 of the second vibrating part 10B. Therefore, 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 bonded to each other by a full-surface attachment scheme based on the adhesive layer 19 to further enhance the adhesion, and thus the vibration efficiency or vibration characteristics of the vibration device can be increased, thereby increasing the sound pressure level.

[0152] Figure 13A , Figure 13B and Figure 13CThe adhesive layer 19 shown may include pressure-sensitive adhesives, optical adhesives, or curable epoxy resin adhesives, but embodiments of this disclosure are not limited thereto. The adhesive layer 19 may be a conductive adhesive layer, including conductive particles, conductive nanoparticles, conductive nanowires, or conductive spheres. The conductive adhesive layer 19 can enhance the conductivity and adhesion between the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B, and therefore, the vibration efficiency or vibration characteristics of the vibrating device can be increased, thereby increasing the sound pressure level.

[0153] Figure 14 It is along Figure 1 An example of another cross-sectional view taken from line A-A'. Figure 15 It shows Figure 14 An example of a vibration generating section is shown. Figure 14 and Figure 15 A vibration device according to a seventh exemplary embodiment of the present disclosure is shown, which is implemented by adding a contact member to a vibration device according to a first exemplary embodiment of the present disclosure. Hereinafter, in describing the vibration device according to the seventh exemplary embodiment of the present disclosure, elements different from those of the vibration device according to the first exemplary embodiment of the present disclosure will be described primarily. Figures 14 to 15 The exemplary embodiments shown can be applied to vibration devices according to the second, fourth and fifth exemplary embodiments of this disclosure.

[0154] Reference Figure 1 , Figure 14 and Figure 15 The vibration device according to the seventh exemplary embodiment of this disclosure may further include a contact member 20.

[0155] The contact member 20 can be disposed or inserted between the first vibrating part 10A and the second vibrating part 10B. For example, the contact member 20 can be disposed or inserted between the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B. For example, the contact member 20 can electrically connect or make contact with each of the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B. For example, the contact member 20 can be an inner connecting member, an inner contact member, an electrode contact member, or an interlayer connecting member, but the embodiments of this disclosure are not limited thereto.

[0156] The contact member 20 according to an exemplary embodiment of this disclosure may include a conductive double-sided adhesive member. The contact member 20 may include conductive double-sided tape, conductive double-sided adhesive pad, or conductive double-sided cushioning tape, but the exemplary embodiments of this disclosure are not limited thereto. The contact member 20 according to an embodiment of this disclosure may include: a metal layer; a first adhesive layer coupled to a first surface of the metal layer and electrically contacting or connected to a second electrode layer 15 of the first vibrating part 10A; and a second adhesive layer coupled to a second surface of the metal layer and coupled to or attached to a third signal line 92c of the signal cable 90.

[0157] According to exemplary embodiments of this disclosure, the metal layer may include a copper (Cu) material, but embodiments of this disclosure are not limited thereto. Each of the first adhesive layer and the second adhesive layer may include or contain a conductive material.

[0158] The contact member 20 may have the same shape as the second electrode layer 15 of the first vibrating part 10A. For example, the contact member 20 may have a size smaller than or equal to that of the second electrode layer 15 of the first vibrating part 10A. For example, the contact member 20 may be exposed by a cutout portion 16 implemented at the second vibrating part 10B.

[0159] The exposed area 20a of the contact member 20, which is exposed by the cutout portion 16 at the second vibration section 10B, can be electrically connected to or in contact with the third signal line 92c of the signal cable 90. Therefore, 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 vibration section 10A, and can be applied to the first electrode layer 13 of the second vibration section 10B simultaneously through the contact member 20.

[0160] In the first vibration unit 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 and the contact member 20. Therefore, the first vibration unit 10A can vibrate (or displace or drive) based on the inverse piezoelectric effect that occurs in the vibration layer 11 by alternating and repeating contraction and expansion according to the first driving signal and the third driving signal.

[0161] In the second vibration section 10B, the first electrode layer 13 can receive a third driving signal via the third signal line 92c and the contact member 20, and the second electrode layer 15 can receive a second driving signal via the second signal line 92b. Therefore, the second vibration section 10B can vibrate (or displace or drive) based on the inverse piezoelectric effect that occurs in the vibration layer 11 by alternating and repeating contraction and expansion, according to the second and third driving signals.

[0162] The vibration device according to the seventh exemplary embodiment of this disclosure can have the same effect as the vibration device according to the first embodiment of this disclosure, or can provide a vibration device with the same effect. Furthermore, the contact member 20 can enhance the adhesion between the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B, and therefore, the vibration efficiency or vibration characteristics of the vibration device can be increased, thereby increasing the sound pressure level.

[0163] Figure 16 A vibration device according to an eighth exemplary embodiment of the present disclosure is shown. Figure 17 It is shown Figure 16 An example of an exploded perspective view of the vibration generating section is shown. Figure 18 It is along Figure 16 The example shown is a cross-sectional view taken by line D-D'. Figure 19 It is shown Figure 16 An example perspective view of the connection structure between the signal cable and the vibration generating unit. Figures 16 to 19 An exemplary embodiment is shown, implemented by modifying the second vibrating part and contact member in the vibration device according to the seventh exemplary embodiment of this disclosure. Hereinafter, when describing the vibration device according to the eighth exemplary embodiment of this disclosure, elements different from those in the vibration device according to the seventh exemplary embodiment of this disclosure will be primarily described. Figures 16 to 19 The exemplary embodiments shown can be applied to vibration devices according to the second, fourth and fifth exemplary embodiments of this disclosure.

[0164] Reference Figures 16 to 19 In the vibration device according to the eighth exemplary embodiment of this disclosure, the second vibration part 10B can be implemented to have the same size and shape as the first vibration part 10A. For example, the second vibration part 10B can overlap or stack with the first vibration part 10A, with the contact member 20 located therebetween. Therefore, the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B can make face-to-face contact with each other through the contact member 20, and the adhesion between the second electrode layer 15 of the first vibration part 10A and the first electrode layer 13 of the second vibration part 10B can be enhanced. As a result, the vibration efficiency or vibration characteristics of the vibration device can be increased, thereby increasing the sound pressure level.

[0165] The contact member 20 may include a protrusion 21 disposed between the first vibration part 10A and the second vibration part 10B and protruding to the outside of a peripheral portion of the vibration generating part 10. For example, the protrusion 21 may protrude from one side of the contact member 20 along the second direction Y. For example, the protrusion 21 may protrude from one side of the contact member 20 within the range of overlap with each of the first cover member 30 and the second cover member 50.

[0166] The signal cable 90 may include: a first signal line 92a, which is electrically connected to or in direct contact with at least a portion of the first electrode layer 13 of the first vibrating part 10A; a second signal line 92b, which is electrically connected to or in direct contact with at least a portion of the second electrode layer 15 of the second vibrating part 10B; and a third signal line 92c, which is electrically connected to or in direct contact with at least a portion of the protrusion 21 of the contact member 20. Except that the positions of the first signal line 92a and the third signal line 92c change based on the position of the protrusion 21 of the contact member 20, the signal cable 90 may be substantially the same as the signal cable 90 of the vibration device according to the first exemplary embodiment of this disclosure, and therefore, repeated descriptions thereof may be omitted for brevity.

[0167] The vibration device according to the eighth exemplary embodiment of this disclosure can have the same effect as the vibration device according to the first exemplary embodiment of this disclosure, or can provide a vibration device with the same effect. Furthermore, the adhesive force between the first vibration part 10A and the second vibration part 10B can be enhanced by the contact member 20, and therefore, the vibration efficiency or vibration characteristics of the vibration device can be increased, thereby increasing the sound pressure level. Since the vibration device according to the eighth exemplary embodiment of this disclosure includes a protrusion 21 of the contact member 20, a drive signal can be supplied to the intermediate electrode layer (or common electrode layer) of the first vibration part 10A and the second vibration part 10B through the protrusion 21 of the contact member 20 without forming a cutout portion 16 at the second vibration part 10B, and therefore, the area of ​​the second vibration part 10B can be increased, thereby improving the vibration efficiency or vibration characteristics.

[0168] Figure 20 A vibration device according to a ninth exemplary embodiment of the present disclosure is shown. Figure 21 It is along Figure 20 The example shown is a cross-sectional view taken by line E-E'. Figure 22 It is shown Figure 21 An example of an exploded perspective view of the vibration generating section is shown. Figure 23 It is shown Figure 20 An example perspective view of the connection structure between the signal cable and the vibration generating unit. Figures 20 to 23An exemplary embodiment is shown in which a third vibration unit is additionally provided in the vibration device according to the first exemplary embodiment, and the signal cable is modified. Hereinafter, when describing the vibration device according to the ninth exemplary embodiment of this disclosure, elements different from those in the vibration device according to the first exemplary embodiment of this disclosure will be primarily described. Figures 20 to 23 The ninth exemplary embodiment of this disclosure shown can be applied to vibration devices according to the second to eighth exemplary embodiments of this disclosure. A description of the vibration device according to the second to eighth exemplary embodiments of this disclosure may be included in... Figures 20 to 23 The description of the vibration device shown.

[0169] Reference Figures 20 to 23 The vibration generating unit 10 of the vibration device according to the ninth exemplary embodiment of the present disclosure may further include a third vibration unit 10C.

[0170] The third vibrating part 10C may be disposed between the first vibrating part 10A and the first cover member 30. The third vibrating part 10C may be directly connected to or in contact with the first vibrating part 10A. For example, the third vibrating part 10C may be stacked or superimposed on the first vibrating part 10A. The third vibrating part 10C and the first vibrating part 10A may be directly connected to or in contact with each other without an intermediate medium such as a connecting member or a contact member.

[0171] The third vibrating part 10C may include a piezoelectric material (or electroactive material) or a piezoelectric element that incorporates the piezoelectric effect. The third vibrating part 10C may include a vibrating layer 11, a first electrode layer 13, and a second electrode layer 15, and may be connected to the above-mentioned reference layer. Figures 1 to 4 Each of the first vibrating part 10A and the second vibrating part 10B described is substantially the same, and therefore repeated descriptions of them can be omitted for the sake of brevity.

[0172] According to an exemplary embodiment of this disclosure, the second electrode layer 15 of the third vibration unit 10C can be electrically contacted or electrically connected to the first electrode layer 13 of the first vibration unit 10A. For example, the second electrode layer 15 of the third vibration unit 10C can directly contact or directly connect to the first electrode layer 13 of the first vibration unit 10A. For example, the second electrode layer 15 of the third vibration unit 10C can be directly connected to or directly electrically contact the first electrode layer 13 of the first vibration unit 10A without an intermediate medium such as a connecting member or a contact member. Therefore, the first electrode layer 13 of the first vibration unit 10A and the second electrode layer 15 of the third vibration unit 10C can be the fourth electrode layer, the second intermediate electrode layer, the second inner electrode layer, and the second common electrode layer of the vibration generating unit 10, but the embodiments of this disclosure are not limited to this. For example, the second electrode layer 15 of the first vibration unit 10A and the first electrode layer 13 of the third vibration unit 10C can be the third electrode layer, the first intermediate electrode layer, the first inner electrode layer, and the first common electrode layer of the vibration generating unit 10, but the embodiments of this disclosure are not limited to this.

[0173] The vibration layer 11 of the first vibration unit 10A can be polarized in the opposite direction to the vibration layer 11 of the second vibration unit 10B, and can be polarized in the same direction as the vibration layer 11 of the third vibration unit 10C. Therefore, the first, second, and third vibration units 10A, 10B, and 10C can be displaced (or vibrated or driven) in the same direction, thereby maximizing the vibration width (or displacement width) of the vibration generating unit 10, and thus further increasing the sound pressure level.

[0174] The vibration device or vibration generating unit 10 according to the ninth exemplary embodiment of this disclosure may further include a first cut portion 16 implemented at the second vibration unit 10B and a second cut portion 26 implemented at the third vibration unit 10C.

[0175] The first cut portion 16 can be achieved by removing a portion of the area of ​​the second vibrating part 10B, so that a first region of the electrode layer closer to the second cover member 50 in the first electrode layer 13 and the second electrode layer 15 of the first vibrating part 10A is exposed. For example, the first cut portion 16 can be achieved by cutting or chamfering the first corner of the four corners of the second vibrating part 10B. For example, the first cut portion 16 can be implemented in one or more of a straight shape and a curved shape. The first cut portion 16 can be related to the above reference. Figures 1 to 4 The described cut portion 16 is essentially the same, and therefore repeated descriptions of it can be omitted for the sake of brevity.

[0176] The second cut portion 26 can be achieved by removing a portion of the area of ​​the third vibrating part 10C, so as to expose the second region of the electrode layer disposed closer to the first cover member 30 in the first electrode layer 13 and the second electrode layer 15 of the first vibrating part 10A. For example, the second cut portion 26 can be achieved by cutting or chamfering the second corner of the four corners of the third vibrating part 10C. For example, the second cut portion 26 can be achieved by cutting or chamfering the second corner of the four corners of the third vibrating part 10C parallel to the first corner of the four corners of the second vibrating part 10B. For example, the second cut portion 26 can be implemented to include one or more of a straight shape and a curved shape. The second cut portion 26 can be implemented to have the same or different shape as the first cut portion 16. For example, the second cut portion 26 can be implemented to have a smaller size than the first cut portion 16.

[0177] According to an exemplary embodiment of this disclosure, a portion of the first electrode layer 13 of the first vibrating part 10A may be exposed through the second cut portion 26 of the third vibrating part 10C to face the first cover member 30. A portion of the second electrode layer 15 of the first vibrating part 10A may be exposed through the first cut portion 16 of the second vibrating part 10B to face the second cover member 50.

[0178] The first cover member 30 may be disposed on the first surface of the vibration generating section 10. For example, the first cover member 30 may be configured to cover the third vibration section 10C of the vibration generating section 10. For example, the first cover member 30 may be configured to cover the first electrode layer 13 of the third vibration section 10C. Therefore, the first cover member 30 may protect the first surface of the vibration generating section 10 or the third vibration section 10C. For example, the first cover member 30 may protect the first surface of the vibration generating section 10 and the first electrode layer 13 of the third vibration section 10C, and may also protect the exposed area (or first exposed area) 13a of the first vibration section 10A exposed by the second cut portion 26.

[0179] The second cover member 50 may be disposed on the second surface of the vibration generating portion 10. For example, the second cover member 50 may be configured to cover the second vibration portion 10B of the vibration generating portion 10. For example, the second cover member 50 may be configured to cover the second electrode layer 15 of the second vibration portion 10B. Therefore, the second cover member 50 may protect the second surface of the vibration generating portion 10 or the second vibration portion 10B. For example, the second cover member 50 may protect the second surface of the vibration generating portion 10 and the second electrode layer 15 of the second vibration portion 10B, and may also protect the exposed area (or second exposed area) 15a of the first vibration portion 10A exposed by the first cut portion 16.

[0180] The first cover member 30 can be connected or coupled to at least a portion of the first surface of the vibration generating part 10 or the first electrode layer 13 of the third vibration part 10C via the first adhesive layer 41. For example, the first cover member 30 can be connected or coupled to at least a portion of the first surface of the vibration generating part 10 or the first electrode layer 13 of the third vibration part 10C via a film lamination process using the first adhesive layer 41.

[0181] The second cover member 50 can be connected or coupled to at least a portion of the second surface of the vibration generating part 10 or the second electrode layer 15 of the second vibration part 10B via the second adhesive layer 42. For example, the second cover member 50 can be connected or coupled to at least a portion of the second surface of the vibration generating part 10 or the second electrode layer 15 of the second vibration part 10B via a film lamination process using the second adhesive layer 42.

[0182] The signal cable 90 can be implemented to be connected at one side of the vibration generating unit 10 to each of the first, second, and third vibration units 10A, 10B, and 10C of the vibration generating unit 10. The signal cable 90 can be electrically connected between the first cover member 30 and the second cover member 50 or in direct contact with each of the first, second, and third vibration units 10A, 10B, and 10C.

[0183] The signal cable 90 according to an exemplary embodiment of this disclosure may include (or may be) a base member 91 and a plurality of signal lines 92a to 92d. For example, the signal cable 90 may include a base member 91 and first, second, third, and fourth signal lines 92a to 92d. Except that the signal cable 90 also includes a fourth signal line 92d, the signal cable 90 may be substantially the same as the signal cable 90 of the vibration device according to a first exemplary embodiment of this disclosure, and therefore, repeated descriptions of the first to third signal lines 92a, 92b, and 92c may be omitted or will be briefly given below.

[0184] The end portion (or distal portion) of the first signal line 92a can be electrically connected to at least a portion of the exposed area 13a of the first electrode layer 13 of the first vibration unit 10A, which is exposed by the second cut portion 26 of the third vibration unit 10C. For example, the end portion of the first signal line 92a can be directly connected to or in direct contact with the first electrode layer 13 of the first vibration unit 10A. Therefore, the first signal line 92a can supply a first drive signal from the vibration drive circuit to the first electrode layer 13 of the first vibration unit 10A. Therefore, the first drive signal can be supplied to the second electrode layer 15 of the third vibration unit 10C through the first electrode layer 13 of the first vibration unit 10A.

[0185] According to another exemplary embodiment of this disclosure, the end portion of the first signal line 92a can be connected to the one described above. Figure 9 and Figure 10 The described wire connection member 80 corresponds to a first wire connection member that is electrically connected to at least a portion of the exposed area 13a of the first electrode layer 13 of the first vibrating part 10A, and therefore, the description of the wire connection member 80 can be included in Figures 20 to 23 In the description.

[0186] The end portion of the second signal line 92b can be electrically connected to at least a portion of the second electrode layer 15 of the second vibration unit 10B. For example, the end portion of the second signal line 92b can be directly connected to or in direct contact with the second electrode layer 15 of the second vibration unit 10B. Therefore, the second signal line 92b can supply a second drive signal supplied from the vibration drive circuit to the second electrode layer 15 of the second vibration unit 10B. For example, the second drive signal can have the same phase as the first drive signal.

[0187] The end portion of the third signal line 92c can be electrically connected to at least a portion of the exposed area 15a of the second electrode layer 15 of the first vibration part 10A, which is exposed by the first cut portion 16 of the second vibration part 10B. For example, the end portion of the third signal line 92c can be directly connected to or directly contact the second electrode layer 15 of the first vibration part 10A. Therefore, the third signal line 92c can supply a third driving signal from the vibration driving circuit to the second electrode layer 15 of the first vibration part 10A. Therefore, the third driving signal can be supplied to the first electrode layer 13 of the second vibration part 10B through the second electrode layer 15 of the first vibration part 10A. For example, the third driving signal can have a phase opposite to the first driving signal or the second driving signal.

[0188] According to another exemplary embodiment of this disclosure, the end portion of the third signal line 92c can be connected to the one described above. Figure 9 and Figure 10 The described wire connection member 80 corresponds to a second wire connection member that is electrically connected to at least a portion of the exposed area 15a of the second electrode layer 15 of the first vibration section 10A, and therefore, the description of the wire connection member 80 can be included in Figures 20 to 23 In the description.

[0189] The end portion of the fourth signal line 92d can be electrically connected to at least a portion of the first electrode layer 13 of the third vibration unit 10C. For example, the end portion of the fourth signal line 92d can be directly connected to or directly contact the first electrode layer 13 of the third vibration unit 10C. Therefore, the fourth signal line 92d can supply a fourth driving signal from the vibration driving circuit to the first electrode layer 13 of the third vibration unit 10C. For example, the fourth driving signal can have the same phase as the third driving signal and can have a phase opposite to the first driving signal or the second driving signal.

[0190] In the first vibration unit 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. Therefore, the first vibration unit 10A can vibrate (or displace or drive) based on the inverse piezoelectric effect that occurs in the vibration layer 11 by alternating and repeating contraction and expansion, according to the first driving signal and the third driving signal.

[0191] In the second vibration section 10B, the first electrode layer 13 can receive a third driving signal via the third signal line 92c and the second electrode layer 15 of the first vibration section 10A, and the second electrode layer 15 can receive a second driving signal via the second signal line 92b. Therefore, the second vibration section 10B can vibrate (or displace or drive) based on the inverse piezoelectric effect appearing in the vibration layer 11 by alternating and repeating contraction and expansion according to the second and third driving signals.

[0192] In the third vibration unit 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 a first driving signal via the first signal line 92a and the first electrode layer 13 of the first vibration unit 10A. Therefore, the third vibration unit 10C can vibrate (or displace or drive) based on the first and fourth driving signals and the inverse piezoelectric effect that occurs in the vibration layer 11 by alternating and repeating contraction and expansion.

[0193] Each of the first, second, and third vibrating sections 10A, 10B, and 10C can be buckled (or displaced, vibrated, or driven) in the same shape. Therefore, in the vibration generating section 10 or the vibration device, the vibration widths (or displacement widths) of each of the first, second, and third vibrating sections 10A, 10B, and 10C can be added together and maximized. For example, in the vibration generating section 10 or the vibration device, the vibration of each of the first, second, and third vibrating sections 10A, 10B, and 10C can be enhanced, and thus, the vibration efficiency or vibration characteristics can be enhanced, and the vibration width (or displacement width) can be further maximized, thereby further enhancing the sound characteristics and / or sound pressure level characteristics of the bass vocal cords.

[0194] The vibration device according to the ninth exemplary embodiment of this disclosure can have the same effect as the vibration device according to the first exemplary embodiment of this disclosure, or can provide a vibration device with the same effect. Since the vibration device according to the ninth exemplary embodiment of this disclosure includes first, second, and third vibration portions 10A, 10B, and 10C that overlap to vibrate (or displace or drive) in the same direction, vibration efficiency or vibration characteristics can be improved, and the vibration width (or displacement width) can be maximized, thereby further improving the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords.

[0195] In the vibration device according to the ninth exemplary embodiment of this disclosure, the vibration generating unit 10 may include the above-mentioned reference. Figures 5 to 7 The adhesive component described. For example, the adhesive component may include a first adhesive component disposed between the peripheral portion of the first vibrating part 10A and the peripheral portion of the second vibrating part 10B, and a second adhesive component disposed between the peripheral portion of the first vibrating part 10A and the peripheral portion of the third vibrating part 10C, and in this case, the adhesive force between the first, second and third vibrating parts 10A, 10B and 10C may be enhanced.

[0196] In the vibration device according to the ninth exemplary embodiment of this disclosure, the vibration generating unit 10 may include the above-mentioned reference. Figure 8 The description refers to one or more slits. For example, one or more slits may be formed at one or more of the second electrode layer 15 of the first vibration section 10A and the first electrode layer 13 of the second vibration section 10B, and may be formed at one or more of the first electrode layer 13 of the first vibration section 10A and the second electrode layer 15 of the third vibration section 10C. In this case, degassing occurring during the firing process can be smoothly discharged, and the stress applied to the vibration layer 11 by the heat of the firing process can be minimized. In the vibration generating section 10, each of the first adhesive member and the second adhesive member may include one or more separate portions communicating with one or more slits, and in this case, degassing occurring during the firing process can be smoothly discharged.

[0197] In the vibration device according to the ninth exemplary embodiment of this disclosure, the vibration generating unit 10 may include the above-mentioned reference. Figure 13A , Figure 13B and Figure 13C The adhesive layer described. For example, the adhesive layer may include a first adhesive layer between the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B, and a second adhesive layer between the first electrode layer 13 of the first vibrating part 10A and the second electrode layer 15 of the third vibrating part 10C, and in this case, the adhesive force between the first, second and third vibrating parts 10A, 10B and 10C can be enhanced.

[0198] In the vibration device according to the ninth exemplary embodiment of this disclosure, the vibration generating unit 10 may include the above-mentioned reference. Figure 14 and Figure 15The contact member described. For example, the contact member may include a first contact member between the second electrode layer 15 of the first vibrating part 10A and the first electrode layer 13 of the second vibrating part 10B, and a second contact member between the first electrode layer 13 of the first vibrating part 10A and the second electrode layer 15 of the third vibrating part 10C, and in this case, the adhesive force between the first, second and third vibrating parts 10A, 10B and 10C can be enhanced.

[0199] In the vibration device according to the ninth exemplary embodiment of this disclosure, the vibration generating unit 10 may include the above-mentioned reference. Figures 16 to 19 The protrusions of the described contact members. For example, the protrusions of the contact members may include a first protrusion protruding from the first contact member and the vibration generating portion 10, and a second protrusion protruding from the second contact member and the vibration generating portion 10 and spaced apart from the first protrusion. A third signal line 92c may be connected to a portion of the first protrusion, and a first signal line 92a may be connected to a portion of the second protrusion. In this case, the area of ​​each of the second vibration portion 10B and the third vibration portion 10C can be increased, thereby improving vibration efficiency or vibration characteristics.

[0200] Figure 24 An apparatus according to an exemplary embodiment of the present disclosure is shown. Figure 25 It is along Figure 24 The example shown is a cross-sectional view taken by line F-F'.

[0201] Reference Figure 24 and Figure 25 An apparatus according to an exemplary embodiment of the present disclosure may include a passive vibration member 100 and one or more vibration generating devices 200.

[0202] The apparatus according to the exemplary embodiments of this disclosure can be applied to implement display devices, sound devices, sound generation devices, sound bars, analog signs or digital signs, etc., but the embodiments of this disclosure are not limited thereto.

[0203] The display device may include: a display panel including a plurality of pixels for realizing a black / white or color image; and a driver for driving the display panel. Images according to exemplary embodiments of this disclosure may include electronic images, digital images, still images, or video images, but embodiments of this disclosure are not limited thereto. For example, the display panel may be a display panel such as a liquid crystal display panel, an organic light-emitting display panel, a light-emitting diode display panel, an electrophoretic display panel, an electrowetting display panel, a micro-light-emitting diode display panel, or a quantum dot light-emitting display panel, but embodiments of this disclosure are not limited thereto. For example, in an organic light-emitting display panel, pixels may include organic light-emitting devices such as organic light-emitting layers, and pixels may be sub-pixels that realize any of a plurality of colors in a configured color image. Therefore, the apparatus according to exemplary embodiments of this disclosure may include setting electronic devices or setting equipment (or setting devices), such as notebook computers, televisions, computer monitors, equipment including automotive devices or other types of vehicle devices, or mobile electronic devices such as smartphones or tablets, which are complete products (or final products) including display panels such as liquid crystal display panels or organic light-emitting display panels.

[0204] The simulated signage can be an advertising sign, poster, bulletin board, etc. Simulated signage can include signage content such as sentences, pictures, and symbols. The signage content can be placed on the passive vibrating member 100 of the device for visibility. For example, the signage content can be directly attached to the passive vibrating member 100, or the signage content can be printed on a medium such as paper, and that medium can be attached to the passive vibrating member 100.

[0205] The passive vibration member 100 can vibrate based on the drive (or vibration or displacement) of one or more vibration generating devices 200. For example, the passive vibration member 100 can generate one or more of vibrations and sounds based on the drive of one or more vibration generating devices 200.

[0206] The passive vibration member 100 according to an exemplary embodiment of this disclosure may be a display panel including a display area (or screen) comprising a plurality of pixels that realize a black / white or color image. Therefore, the passive vibration member 100 may generate one or more types of vibration and sound based on the driving of one or more vibration generating devices 200. For example, the passive vibration member 100 may vibrate based on the driving of the vibration generating device 200 while displaying an image on the display area, thereby generating or outputting sound synchronized with the image in the display area. Therefore, the passive vibration member 100 may be a vibration object, a display member, a display panel, a sign 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 an image screen, etc., but embodiments of this disclosure are not limited thereto.

[0207] A passive vibration member 100 according to another exemplary embodiment of this disclosure may include (or may be) a vibrating plate comprising a metallic or non-metallic material (or a composite non-metallic material) with material properties suitable for vibration by one or more vibration generating devices 200 to output sound. For example, the passive vibration member 100 may include a vibrating plate comprising one or more materials selected from metal, plastic, paper, fiber, cloth, wood, leather, rubber, glass, carbon, and mirror. For example, the paper may be cone paper for a loudspeaker. For example, the cone paper may be pulp or foam plastic, etc., but embodiments of this disclosure are not limited thereto.

[0208] A passive vibration member 100 according to another exemplary embodiment of this disclosure may include a display panel containing pixels for displaying images, or may include a non-display panel. For example, the passive vibration member 100 may include one or more of the following: a display panel containing pixels for displaying images, a screen panel on which images are projected from a display device, a lighting panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors; however, embodiments of this disclosure are not limited thereto. For example, a non-display panel may be a light-emitting diode (LED) lighting panel (or device), an organic light-emitting panel (or device), or an inorganic light-emitting panel (or device); however, embodiments of this disclosure are not limited thereto.

[0209] One or more vibration generating devices 200 may be configured to vibrate the passive vibrating member 100. One or more vibration generating devices 200 may be configured to be connected to the rear surface 100a of the passive vibrating member 100 via a connecting member 150. Therefore, one or more vibration generating devices 200 may cause the passive vibrating member 100 to vibrate in order to generate or output one or more of vibrations and sounds based on the vibration of the passive vibrating member 100.

[0210] One or more vibration generating devices 200 may include the above reference Figures 1 to 23 One or more of the described vibration devices. Therefore, the above references Figures 1 to 23 The description of the provided vibration device may include in Figure 24 and Figure 25 In the description of the vibration generating device 200 shown, and therefore, similar reference numerals may refer to similar elements and their repeated descriptions may be omitted for the sake of brevity.

[0211] A connecting member 150 may be disposed between the vibration generating device 200 and the passive vibration member 100. The connecting member 150 may be disposed between at least a portion of the vibration generating device 200 and the passive vibration member 100. According to an exemplary embodiment of this disclosure, the connecting member 150 may be connected between the passive vibration member 100 and the central portion of the vibration generating device 200, excluding the peripheral portion. For example, the connecting member 150 may be connected between the passive vibration member 100 and the central portion of the vibration generating device 200 based on a partial attachment scheme (or partial adhesive scheme). The central portion (or central part) of the vibration generating device 200 may be the center of vibration, and therefore, the vibration of the vibration generating device 200 can be effectively transmitted to the passive vibration member 100 through the connecting member 150. The peripheral portion of the vibration generating device 200 can be spaced apart from each of the connecting member 150 and the passive vibration member 100 and lifted without being connected to the connecting member 150 and / or the passive vibration member 100. Therefore, in the buckling vibration (or bending vibration) of the vibration generating device 200, the vibration of the peripheral portion of the vibration generating device 200 can be prevented (or reduced) by the connecting member 150 and / or the passive vibration member 100, thereby increasing the vibration amplitude (or displacement amplitude) of the vibration generating device 200. Consequently, the vibration amplitude (or displacement amplitude) of the passive vibration member 100 based on the vibration of the vibration generating device 200 can be increased, and thus, the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the passive vibration member 100 can be further enhanced.

[0212] According to another exemplary embodiment of this disclosure, the connecting member 150 may be connected to or attached to the front surface (or the entire front surface) of each of one or more vibration generating devices 200 and the rear surface 100a of the passive vibration member 100 based on a whole surface attachment scheme (or whole surface bonding scheme).

[0213] The connecting member 150 according to an exemplary embodiment of this disclosure may include a material comprising an adhesive layer having relatively strong adhesion or bonding force with respect to each of the one or more vibration generating devices 200 and the rear surface of the display panel or the rear surface of the passive vibration member 100. For example, the connecting member 150 may include a foam pad, double-sided tape, or adhesive, but embodiments of this disclosure are not limited thereto. For example, the adhesive layer of the connecting member 150 may include epoxy resin, acrylic, silicone resin, or polyurethane, but embodiments of this disclosure are not limited thereto. For example, the adhesive layer of the connecting member 150 may include an acrylic-based material (or substance) that has relatively strong adhesion and relatively high hardness compared to acrylic and polyurethane. Therefore, vibrations from one or more vibration generating devices 200 can be suitably transmitted to the vibration member 100.

[0214] The apparatus according to an exemplary embodiment of the present disclosure may further include a support member 300 and a coupling member 350.

[0215] A support member 300 may be disposed on the rear surface 100a of the passive vibration member 100. The support member 300 may be disposed on the rear surface 100a of the passive vibration member 100 to cover one or more vibration generating devices 200. The support member 300 may be disposed on the rear surface 100a of the passive vibration member 100 to cover the entire rear surface 100a of the passive vibration member 100 and one or more vibration generating devices 200. For example, the support member 300 may have the same dimensions as the passive vibration member 100. For example, the support member 300 may cover the entire rear surface of the passive vibration member 100, with a gap space GS therebetween and one or more vibration generating devices 200. The gap space GS may be provided by a coupling member 350 disposed between the passive vibration members 100 and the support member 300 facing each other. The gap space GS may be referred to as an air gap, accommodating space, vibration space, or sound box, but embodiments of this disclosure are not limited thereto.

[0216] The support member 300 may include any of the following materials: glass, metal, and plastic. For example, the support member 300 may include a stacked structure in which one or more of the following materials are stacked: glass, plastic, and metal.

[0217] Each of the passive vibration member 100 and the support member 300 may have a square or rectangular shape, but the exemplary embodiments of this disclosure are not limited thereto, and may have a polygonal shape, a non-polygonal shape, a circular shape, or an elliptical shape. For example, when the apparatus according to the embodiments of this disclosure is applied to a sound device or a soundbar, each of the passive vibration member 100 and the support member 300 may have a rectangular shape in which the length of the long side is two or more times the length of the short side, but the embodiments of this disclosure are not limited thereto.

[0218] The coupling member 350 can be configured to connect the rear peripheral portion of the passive vibration member 100 and the front peripheral portion of the support member 300, and thus, the gap space GS can be provided between the passive vibration member 100 and the support member 300 facing each other.

[0219] The coupling member 350 according to an exemplary embodiment of this disclosure may include an elastic material having adhesive properties and capable of compression and decompression. For example, the coupling member 350 may include double-sided tape, single-sided tape, double-sided foam tape, or double-sided adhesive foam pad, but embodiments of this disclosure are not limited thereto, and may include an elastic pad having adhesive properties and capable of compression and decompression, such as a rubber pad or a silicone pad. For example, the coupling member 350 may be formed of an elastomer.

[0220] According to another exemplary embodiment of this disclosure, the support member 300 may further include a sidewall portion supporting the rear peripheral portion of the passive vibration member 100. The sidewall portion of the support member 300 may protrude or bend from the front peripheral portion of the support member 300 toward the rear peripheral portion of the passive vibration member 100, and thus, a gap space GS may be provided between the passive vibration member 100 and the support member 300. For example, a coupling member 350 may be configured to connect the sidewall portion of the support member 300 and the rear peripheral portion of the passive vibration member 100. Therefore, the support member 300 may cover one or more vibration generating devices 200 and may support the rear surface 100a of the passive vibration member 100. For example, the support member 300 may cover one or more vibration generating devices 200 and may support the rear peripheral portion of the passive vibration member 100.

[0221] According to another exemplary embodiment of this disclosure, the passive vibration member 100 may further include a sidewall portion connected to the front peripheral portion of the support member 300. The sidewall portion of the passive vibration member 100 may protrude or bend from the rear peripheral portion of the passive vibration member 100 toward the front peripheral portion of the support member 300, and thus, a gap space GS may be provided between the passive vibration member 100 and the support member 300. The stiffness of the passive vibration member 100 may be increased based on the sidewall portion. For example, a coupling member 350 may be configured to connect between the sidewall portion of the passive vibration member 100 and the front peripheral portion of the support member 300. Therefore, the support member 300 may cover one or more vibration generating devices 200 and may support the rear surface 100a of the passive vibration member 100. For example, the support member 300 may cover one or more vibration generating devices 200 and may support the rear peripheral portion of the passive vibration member 100.

[0222] The apparatus according to exemplary embodiments of the present disclosure may also include one or more housings 250.

[0223] The housing 250 may be connected or coupled to the rear periphery of the passive vibration member 100 to individually cover one or more vibration generating devices 200. For example, the housing 250 may be connected or coupled to the rear surface 100a of the passive vibration member 100 via coupling member 251. The housing 250 may be configured in the rear surface of the support member 300 to cover or surround an enclosed space of the vibration generating device 200. For example, the housing 250 may be configured in the rear surface 100a of the passive vibration member 100 to cover or surround an enclosed space of one or more vibration generating devices 200. For example, the housing 250 may be an enclosing member, an enclosing cover, an enclosed box, or a speaker enclosure, but embodiments of this disclosure are not limited thereto. The enclosed space may be an air gap, a vibration space, a sound space, or a speaker enclosure, but embodiments of this disclosure are not limited thereto.

[0224] The housing 250 may comprise one or more materials selected from metallic materials and non-metallic materials (or composite non-metallic materials). For example, the housing 250 may comprise one or more materials selected from metallic materials, plastics, carbon, and wood, but embodiments of this disclosure are not limited thereto.

[0225] When the passive vibrating member 100 or one or more vibration generating devices 200 vibrate, the housing 250 according to an exemplary embodiment of the present disclosure can retain the air-based impedance component acting on the passive vibrating member 100. For example, the air surrounding the passive vibrating member 100 can resist the vibration of the passive vibrating member 100 and can act as an impedance component having a frequency-based reactance component and a resistance component. Therefore, the housing 250 can be configured in the rear surface 100a of the passive vibrating member 100 to form an enclosed space surrounding one or more vibration generating devices 200, and thus can retain the air-based impedance component (or air impedance or elastic impedance) acting on the passive vibrating member 100, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords and enhancing the sound quality of the high-pitched vocal cords.

[0226] Table 1 below shows the sound output characteristics of each configuration of experimental examples 2 to 6 of the apparatus according to some embodiments of the present disclosure. Experimental example 1 is the average sound pressure level (SPL) when the vibration generating part is configured with one vibration part. Experimental example 2 is the average sound pressure level when the vibration generating part is configured by directly stacking two vibration parts according to an embodiment of the present disclosure. Experimental example 3 is the average sound pressure level when the vibration generating part is configured by stacking two vibration parts by a wire attachment scheme according to an exemplary embodiment of the present disclosure. Experimental example 4 is the average sound pressure level when the vibration generating part is configured by stacking two vibration parts by a partial attachment scheme according to an exemplary embodiment of the present disclosure. Experimental example 5 is the average sound pressure level when the vibration generating part is configured by stacking two vibration parts by a full surface attachment scheme according to an exemplary embodiment of the present disclosure. Experimental example 6 is the average sound pressure level when the vibration generating part is configured by stacking three vibration parts by a full surface attachment scheme according to an exemplary embodiment of the present disclosure.

[0227] Sound output characteristics can be measured using sound measurement equipment. The sound measurement equipment utilizes the AudioPrecision APX525 audio analyzer. The sound measurement equipment can be configured to include a sound card capable of sending or receiving sound to or from a control PC, an amplifier capable of amplifying the signal generated by the sound card and transmitting the amplified signal to the vibration device, and a microphone capable of collecting sound generated at the display panel based on the vibration device's drive. For example, the microphone can be positioned at the center of the vibration device, and the distance between the display panel and the microphone can be 30 cm. Sound can be measured with the microphone perpendicular to the vibration device. The sound collected by the microphone can be input to the control PC via the sound card, and the control program can examine the input sound to analyze the device's sound output characteristics. For example, the frequency response characteristics in the 20 Hz to 20 kHz frequency range can be measured using a pulse program. The frequency response characteristics can be measured by applying 1 / 3 octave smoothing in a sine sweep across a frequency range of 0.15 kHz to 20 kHz.

[0228] [Table 1]

[0229]

[0230] Referring to Table 1, it can be seen that the average sound pressure level in each of Experimental Examples 2 to 6, which are exemplary embodiments of the present disclosure, is higher than that in Experimental Example 1, where a vibration generating part is configured with one vibration part. In Experimental Example 2, the average sound pressure level is higher than in Experimental Example 1. In each of Experimental Examples 3 to 5, the average sound pressure level increases as the area of ​​the adhesive layer formed between the two vibration parts increases compared to Experimental Example 1.

[0231] Therefore, since the vibration device according to the exemplary embodiments of this disclosure includes multiple overlapping or stacked vibration parts, the sound characteristics and / or sound pressure level characteristics can be improved, and the sound characteristics and / or sound pressure level characteristics can be further improved based on the area of ​​the adhesive layer between the multiple vibration parts.

[0232] The vibration device and apparatus including the vibration device according to one or more exemplary embodiments of the present disclosure will now be described.

[0233] A vibration device according to one or more exemplary embodiments of the present disclosure may include: a vibration generating part, including a first vibration part and a second vibration part overlapping the first vibration part; a first cover member at a first surface of the vibration generating part; a second cover member at a second surface different from the first surface of the vibration generating part; and a signal cable, including a first signal line, a second signal line and a third signal line connected to the first vibration part and the second vibration part and disposed between the first cover member and the second cover member.

[0234] According to one or more exemplary embodiments of this disclosure, the second vibration portion may include a cutout portion that exposes a portion of the first vibration portion, and the first vibration portion may include an exposed area facing the second cover member through the cutout portion.

[0235] According to one or more exemplary embodiments of this disclosure, one of the first signal line, the second signal line, and the third signal line may be connected to the exposed area of ​​the first vibrating part.

[0236] According to one or more exemplary embodiments of this disclosure, each of the first vibration portion and the second vibration portion may include: a vibration layer comprising a piezoelectric material; a first electrode layer at a first surface of the vibration layer; and a second electrode layer at a second surface different from the first surface of the vibration layer.

[0237] According to one or more exemplary embodiments of this disclosure, the first electrode layer of the second vibration portion may contact the second electrode layer of the first vibration portion.

[0238] According to one or more exemplary embodiments of this disclosure, the second vibration portion may include a cutout portion that exposes a portion of the second electrode layer of the first vibration portion, and any one of the first signal line, the second signal line, and the third signal line may be connected to the portion of the second electrode layer of the first vibration portion exposed by the cutout portion of the second vibration portion.

[0239] According to one or more exemplary embodiments of this disclosure, the vibration generating unit may further include a wire connecting member that connects one of the first signal line, the second signal line, and the third signal line to the second electrode layer of the first vibration unit exposed by the cut portion of the second vibration unit. The second vibration unit may include a cut portion that exposes a portion of the second electrode layer of the first vibration unit, and one of the first signal line, the second signal line, and the third signal line may be connected to the second electrode layer of the first vibration unit exposed by the cut portion of the second vibration unit through the wire connecting member.

[0240] According to one or more exemplary embodiments of this disclosure, the second vibration unit may include a cutout portion that exposes a portion of the second electrode layer of the first vibration unit, a first signal line may be connected to the first electrode layer of the first vibration unit, a second signal line may be connected to the second electrode layer of the second vibration unit, and a third signal line may be connected to the portion of the second electrode layer of the first vibration unit exposed by the cutout portion of the second vibration unit.

[0241] According to one or more exemplary embodiments of this disclosure, the vibration generating part may further include an adhesive member between the peripheral portion of the first vibration part and the peripheral portion of the second vibration part.

[0242] According to one or more exemplary embodiments of this disclosure, one or more of the second electrode layer of the first vibration portion and the first electrode layer of the second vibration portion may include one or more slits.

[0243] According to one or more exemplary embodiments of this disclosure, the vibration generating part may further include an adhesive member between the peripheral portion of the first vibration part and the peripheral portion of the second vibration part, and the adhesive member may include one or more separate portions communicating with one or more slits.

[0244] According to one or more exemplary embodiments of this disclosure, the vibration generating section may further include an adhesive layer between the second electrode layer of the first vibration section and the first electrode layer of the second vibration section.

[0245] According to one or more exemplary embodiments of this disclosure, the vibration generating unit may further include a contact member between the first vibration unit and the second vibration unit.

[0246] According to one or more exemplary embodiments of this disclosure, the contact member may be a conductive double-sided adhesive member.

[0247] According to one or more exemplary embodiments of this disclosure, the contact member may include a protrusion extending from the vibration generating portion, and one of the first signal line, the second signal line, and the third signal line may be connected to a portion of the protrusion.

[0248] According to one or more exemplary embodiments of this disclosure, the vibration generating unit may further include a third vibration unit overlapping the first vibration unit, and the signal cable may further include a fourth signal line connected to the third vibration unit.

[0249] According to one or more exemplary embodiments of this disclosure, each of the first vibration part, the second vibration part, and the third vibration part may include: a vibration layer comprising a piezoelectric material; a first electrode layer at a first surface of the vibration layer; and a second electrode layer at a second surface different from the first surface of the vibration layer.

[0250] According to one or more exemplary embodiments of this disclosure, the first electrode layer of the second vibration portion can contact the second electrode layer of the first vibration portion, and the first electrode layer of the first vibration portion can contact the second electrode layer of the third vibration portion.

[0251] According to one or more exemplary embodiments of this disclosure, the second vibration portion may include a first cut portion that exposes a first region of the second electrode layer of the first vibration portion, and the third vibration portion may include a second cut portion that exposes a second region of the first electrode layer of the first vibration portion.

[0252] According to one or more exemplary embodiments of this disclosure, a first signal line may be connected to the portion of the first electrode layer of the first vibrating part exposed by the second cut portion of the third vibrating part, a second signal line may be connected to the second electrode layer of the second vibrating part, a third signal line may be connected to the portion of the second electrode layer of the first vibrating part exposed by the first cut portion of the second vibrating part, and a fourth signal line may be connected to the first electrode layer of the third vibrating part.

[0253] According to one or more exemplary embodiments of this disclosure, the vibration generating unit may further include: a first wire connecting member for connecting a first signal line to a portion of the first electrode layer of the first vibration unit exposed by a second cutout portion of the third vibration unit; and a second wire connecting member for connecting a third signal line to a portion of the second electrode layer of the first vibration unit exposed by a first cutout portion of the second vibration unit, wherein the first signal line can be connected to the portion of the first electrode layer of the first vibration unit exposed by a second cutout portion of the third vibration unit via the first wire connecting member, and the third signal line can be connected to the portion of the second electrode layer of the first vibration unit exposed by a first cutout portion of the second vibration unit via the second wire connecting member.

[0254] According to one or more exemplary embodiments of this disclosure, the vibration generating unit may further include: a first adhesive member between the peripheral portion of the first vibration unit and the peripheral portion of the second vibration unit; and a second adhesive member between the peripheral portion of the first vibration unit and the peripheral portion of the third vibration unit.

[0255] According to one or more exemplary embodiments of the present disclosure, one or more of the second electrode layer of the first vibration part and the first electrode layer of the second vibration part may include one or more slits, and one or more of the first electrode layer of the first vibration part and the second electrode layer of the third vibration part may include one or more slits.

[0256] According to one or more exemplary embodiments of the present disclosure, the vibration generating unit may further include: a first adhesive member between a peripheral portion of the first vibration unit and a peripheral portion of the second vibration unit; and a second adhesive member between a peripheral portion of the first vibration unit and a peripheral portion of the third vibration unit, and each of the first adhesive member and the second adhesive member may include one or more separate portions communicating with one or more slits.

[0257] According to one or more exemplary embodiments of the present disclosure, 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.

[0258] According to one or more exemplary embodiments of the present disclosure, 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.

[0259] According to one or more exemplary embodiments of this disclosure, each of the first contact member and the second contact member may be a conductive double-sided adhesive member.

[0260] According to one or more exemplary embodiments of this disclosure, the first contact member may include a first protrusion protruding from the vibration generating portion, the second contact member may include a second protrusion protruding from the vibration generating portion, a first signal line may be connected to a portion of the second protrusion, and a third signal line may be connected to a portion of the first protrusion.

[0261] An apparatus according to one or more exemplary embodiments of the present disclosure may include: a passive vibration member; and a vibration generating device connected to the passive vibration member to cause the passive vibration member to vibrate. The vibration generating device may include a vibration device, which may include: a vibration generating section including a first vibration section and a second vibration section overlapping the first vibration section; a first cover member at a first surface of the vibration generating section; a second cover member at a second surface different from the first surface of the vibration generating section; and a signal cable including a first signal line, a second signal line, and a third signal line connected to the first vibration section and the second vibration section and disposed between the first cover member and the second cover member. The vibration device may also be configured according to one or more exemplary embodiments of the present disclosure described herein.

[0262] According to one or more exemplary embodiments of this disclosure, the apparatus may also include a housing at the rear surface of the passive vibration member to cover the vibration generating device.

[0263] According to one or more exemplary embodiments of this disclosure, the passive vibration component may include one or more of metal, plastic, paper, fiber, cloth, leather, wood, rubber, glass, carbon, and mirror.

[0264] According to some embodiments of this disclosure, a passive vibration component may include one or more of the following: a display panel including pixels configured to display images, a screen panel on which images are projected from a display device, a light-emitting diode illumination panel, an organic light-emitting illumination panel, an inorganic light-emitting illumination panel, a sign panel, vehicle interior materials, vehicle exterior materials, vehicle windows, vehicle seat interior materials, building ceiling materials, building interior materials, building windows, aircraft interior materials, aircraft windows, and mirrors.

[0265] An apparatus according to one or more exemplary embodiments of this disclosure may include a passive vibration member, a connecting member, and a vibration generating device connected to the passive vibration member via the connecting member to cause the passive vibration member to vibrate. The vibration generating device may include a vibration device. The vibration generating device may include a vibration generating section comprising a first vibration section and a second vibration section overlapping the first vibration section; a first cover member at a first surface of the vibration generating section; a second cover member at a second surface different from the first surface of the vibration generating section; and a signal cable including a first signal line, a second signal line, and a third signal line connected to the first and second vibration sections and disposed between the first and second cover members.

[0266] According to one or more exemplary embodiments of this disclosure, a connecting member may be connected between the passive vibration member and the central portion of the vibration generating device. The peripheral portion of the vibration generating device may be separated from and lifted from each of the connecting member and the passive vibration member, and not connected to the connecting member and / or the passive vibration member.

[0267] According to one or more exemplary embodiments of this disclosure, the connecting member may include a material comprising an adhesive layer. The connecting member may be attached to or attached to the entire front surface of the vibration generating device and the rear surface of the passive vibration member.

[0268] Vibration devices according to one or more exemplary embodiments of this disclosure can be applied to vibration devices disposed at a device. Devices according to one or more exemplary embodiments of this disclosure can be applied to mobile devices, video phones, smartwatches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, bending devices, sliding devices, variable devices, electronic notebooks, e-books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop personal computers (PCs), laptop PCs, netbooks, workstations, navigation devices, car navigation devices, car display devices, automotive devices, theater devices, theater display devices, televisions, wallpaper display devices, signage devices, game consoles, laptop computers, monitors, cameras, camcorders, and home appliances, etc. Additionally, vibration generating devices according to some embodiments of this disclosure can be applied to organic light-emitting lighting devices or inorganic light-emitting lighting devices. When a vibration generating device is applied to a lighting device, the lighting device can function as both lighting and a speaker, but the embodiments of this disclosure are not limited thereto.

[0269] The following summarizes one or more exemplary embodiments of this disclosure. Other exemplary embodiments may also be understood in light of the entirety of this disclosure.

[0270] Example 1. A vibration device, comprising:

[0271] A vibration generating unit, comprising a first vibration unit and a second vibration unit overlapping the first vibration unit;

[0272] The first cover member at the first surface of the vibration generating part;

[0273] A second cover member located on a second surface different from the first surface of the vibration-generating part; and

[0274] The signal cable includes a first signal line, a second signal line, and a third signal line, which are connected to a first vibrating part and a second vibrating part and are disposed between a first cover member and a second cover member.

[0275] Example 2. Based on the vibration device in Example 1,

[0276] The second vibrating part includes a cutout that exposes a portion of the first vibrating part, and

[0277] The first vibration part includes an exposed area facing the second cover member through a cut portion.

[0278] Example 3. The vibration device according to Example 2, wherein one of the first signal line, the second signal line and the third signal line is connected to the exposed area of ​​the first vibration part.

[0279] Example 4. The vibration device according to Example 1, wherein each of the first vibration part and the second vibration part includes:

[0280] Including the vibrating layer of piezoelectric materials;

[0281] The first electrode layer at the first surface of the vibration layer; and

[0282] A second electrode layer located on a second surface that is different from the first surface of the vibration layer.

[0283] Example 5. The vibration device according to Example 4, wherein the first electrode layer of the second vibration part contacts the second electrode layer of the first vibration part.

[0284] Example 6. The vibration device according to Example 5, wherein,

[0285] The second vibration section includes a cutout portion that exposes a portion of the second electrode layer of the first vibration section, and

[0286] The portion of one of the first signal line, the second signal line, and the third signal line that is connected to the second electrode layer of the first vibration part and exposed by the cut portion of the second vibration part.

[0287] Example 7. The vibration device according to Example 5, wherein,

[0288] The second vibration section includes a cutout portion that exposes a portion of the second electrode layer of the first vibration section;

[0289] The vibration generating unit also includes a wire connection member that connects one of the first signal line, the second signal line, and the third signal line to the second electrode layer of the first vibration unit, which is exposed by the cutout portion of the second vibration unit; and

[0290] One of the first signal line, the second signal line, and the third signal line is connected to the second electrode layer of the first vibrating part, which is exposed by the cut portion of the second vibrating part, via a wire connecting member.

[0291] Example 8. The vibration device according to Example 5, wherein,

[0292] The second vibration section includes a cutout portion that exposes a portion of the second electrode layer of the first vibration section.

[0293] The first signal line is connected to the first electrode layer of the first vibration section.

[0294] The second signal line is connected to the second electrode layer of the second vibration section, and

[0295] The third signal line is connected to the portion of the second electrode layer of the first vibration unit that is exposed by the cutout portion of the second vibration unit.

[0296] Example 9. The vibration device according to Example 1, wherein the vibration generating part further includes an adhesive member between the peripheral portion of the first vibration part and the peripheral portion of the second vibration part.

[0297] Example 10. The vibration device according to Example 4, wherein one or more of the second electrode layer of the first vibration part and the first electrode layer of the second vibration part include one or more slits.

[0298] Example 11. According to the vibration device of Example 10, wherein,

[0299] The vibration generating section also includes an adhesive member between the outer periphery of the first vibration section and the outer periphery of the second vibration section, and

[0300] The adhesive component includes one or more separate portions communicating with one or more slits.

[0301] Example 12. The vibration device according to Example 4, wherein the vibration generating part further includes an adhesive layer between the second electrode layer of the first vibration part and the first electrode layer of the second vibration part.

[0302] Example 13. The vibration device according to Example 1, wherein the vibration generating part further includes a contact member between the first vibration part and the second vibration part.

[0303] Example 14. The vibration device according to Example 13, wherein the contact member is a conductive double-sided adhesive member.

[0304] Example 15. The vibration device according to Example 13, wherein,

[0305] The contact member includes a protrusion extending from the vibration-generating part, and

[0306] One of the first signal line, the second signal line, and the third signal line is connected to a portion of the protrusion.

[0307] Example 16. According to the vibration device of Example 1, wherein,

[0308] The vibration generating section also includes a third vibration section overlapping the first vibration section, and

[0309] The signal cable also includes a fourth signal line that is connected to the third vibration unit.

[0310] Example 17. The vibration device according to Example 16, wherein each of the first vibration part, the second vibration part, and the third vibration part includes:

[0311] Including the vibrating layer of piezoelectric materials;

[0312] The first electrode layer at the first surface of the vibration layer; and

[0313] A second electrode layer located on a second surface that is different from the first surface of the vibration layer.

[0314] Example 18. The vibration device according to Example 17, wherein,

[0315] The first electrode layer of the second vibration section contacts the second electrode layer of the first vibration section, and

[0316] The first electrode layer of the first vibration section contacts the second electrode layer of the third vibration section.

[0317] Example 19. The vibration device according to Example 17, wherein,

[0318] The second vibration section includes a first cut portion that exposes a first region of the second electrode layer of the first vibration section, and

[0319] The third vibration section includes a second cut portion that exposes a second region of the first electrode layer of the first vibration section.

[0320] Example 20. The vibration device according to Example 19, wherein,

[0321] The first signal line is connected to the portion of the first electrode layer of the first vibrating part that is exposed by the second cut portion of the third vibrating part.

[0322] The second signal line is connected to the second electrode layer of the second vibration section.

[0323] The third signal line is connected to the portion of the second electrode layer of the first vibrating part that is exposed by the first cut portion of the second vibrating part, and

[0324] The fourth signal line is connected to the first electrode layer of the third vibration section.

[0325] Example 21. The vibration device according to Example 20, wherein the vibration generating unit further includes:

[0326] A first wire connection member connects a first signal line to the portion of the first electrode layer of the first vibrating part exposed by the second cutout portion of the third vibrating part; and

[0327] The second wire connection member connects the third signal line to the portion of the second electrode layer of the first vibration unit that is exposed by the first cutout portion of the second vibration unit.

[0328] The first signal line is connected to the portion of the first electrode layer of the first vibrating part exposed by the second cut portion of the third vibrating part via the first line connecting member.

[0329] The third signal line is connected to the portion of the second electrode layer of the first vibration part exposed by the first cut portion of the second vibration part through the second line connecting member.

[0330] Example 22. The vibration device according to Example 16, wherein the vibration generating unit further includes:

[0331] The first adhesive member between the outer periphery of the first vibrating part and the outer periphery of the second vibrating part; and

[0332] A second adhesive component between the outer periphery of the first vibrating part and the outer periphery of the third vibrating part.

[0333] Example 23. The vibration device according to Example 17, wherein,

[0334] One or more of the second electrode layer of the first vibration part and the first electrode layer of the second vibration part include one or more slits, and

[0335] One or more of the first electrode layer of the first vibration section and the second electrode layer of the third vibration section include one or more slits.

[0336] Example 24. The vibration device according to Example 23, wherein the vibration generating unit further includes:

[0337] The first adhesive member between the outer periphery of the first vibrating part and the outer periphery of the second vibrating part; and

[0338] The second adhesive component between the outer periphery of the first vibrating part and the outer periphery of the third vibrating part.

[0339] Each of the first adhesive component and the second adhesive component includes one or more separate portions communicating with one or more slits.

[0340] Example 25. The vibration device according to Example 17, wherein the vibration generating unit further includes:

[0341] The first adhesive layer between the second electrode layer of the first vibration part and the first electrode layer of the second vibration part; and

[0342] A second adhesive layer between the first electrode layer of the first vibration section and the second electrode layer of the third vibration section.

[0343] Example 26. The vibration device according to Example 16, wherein the vibration generating unit further includes:

[0344] The first contact member between the first vibrating part and the second vibrating part; and

[0345] The second contact member between the first vibrating part and the third vibrating part.

[0346] Example 27. A vibration device according to Example 26, wherein each of the first contact member and the second contact member is a conductive double-sided adhesive member.

[0347] Example 28. The vibration device according to Example 26, wherein,

[0348] The first contact member includes a first protrusion protruding from the vibration generating part.

[0349] The second contact member includes a second protrusion that protrudes from the vibration generating part.

[0350] The first signal line is connected to a portion of the second protrusion, and

[0351] The third signal line is connected to a portion of the first protrusion.

[0352] Example 29. A device for vibration, comprising:

[0353] Passive vibration components; and

[0354] A vibration generating device is connected to a passive vibrating member to cause the passive vibrating member to vibrate.

[0355] The vibration generating device includes a vibration device according to any one of Examples 1 to 28.

[0356] Example 30. The apparatus according to Example 29 further includes a housing at the rear surface of the passive vibration member for covering the vibration generating device.

[0357] Example 31. The apparatus according to Example 29, wherein the passively vibrating component comprises one or more of metal, plastic, paper, fiber, fabric, leather, wood, rubber, glass, carbon, and mirror.

[0358] Example 32. The apparatus according to Example 29, wherein the passive vibration member comprises one or more of the following: a display panel including pixels configured to display an image, a screen panel on which an image is projected from the display device, a light-emitting diode illumination panel, an organic light-emitting illumination panel, an inorganic light-emitting illumination panel, a sign panel, motor vehicle interior material, motor vehicle exterior material, motor vehicle window glass, motor vehicle seat interior material, building ceiling material, building interior material, building window glass, aircraft interior material, aircraft window glass, and a mirror.

[0359] Example 33. A device for vibration, comprising:

[0360] Passive vibration components;

[0361] Connecting components; and

[0362] A vibration generating device, which is connected to a passive vibrating member via a connecting member to cause the passive vibrating member to vibrate.

[0363] The vibration generating device includes a vibration device according to any one of Examples 1 to 28.

[0364] Example 34. The apparatus according to Example 33, wherein the connecting member is connected between the passive vibrating member and the central portion of the vibration generating device, and

[0365] The peripheral portion of the vibration generating device is spaced apart from each of the connecting member and the passive vibration member and is lifted without being connected to the connecting member and / or the passive vibration member.

[0366] Example 35. The apparatus according to Example 33, wherein the connecting member includes a material comprising an adhesive layer, and

[0367] The connecting member is connected to or attached to the entire front surface of the vibration generating device and the rear surface of the passive vibration member.

[0368] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from its scope. Therefore, this disclosure is intended to cover modifications and variations thereof, provided that such modifications and variations fall within the scope of the appended claims and their equivalents.

Claims

1. A vibration device, comprising: A vibration generating unit, comprising a first vibration unit and a second vibration unit overlapping the first vibration unit; A first cover member at the first surface of the vibration generating part; A second cover member located on a second surface that is different from the first surface of the vibration generating part; as well as The signal cable includes a first signal line, a second signal line, and a third signal line, which are connected to the first vibrating part and the second vibrating part and are disposed between the first cover member and the second cover member. The signal cable mentioned above also includes: A base member, which is formed in a strip shape and has a first signal line, a second signal line, and a third signal line on one surface of the base member. An insulating member that covers the first signal line, the second signal line, the third signal line, and one surface of the base member. Wherein, the end portion of each of the first signal line, the second signal line, the third signal line, the base member, and the insulating member is accommodated in the portion between a peripheral portion of the first cover member and a peripheral portion of the second cover member. The signal cable is integrated with the vibration generating unit, and Each of the first to the third signal lines extends from the end portion of the base member.

2. The vibration device according to claim 1, in, The second vibrating part includes a cutout portion that exposes a portion of the first vibrating part, and The first vibration part includes an exposed area facing the second cover member through the cut portion.

3. The vibration device according to claim 2, wherein, One of the first signal line, the second signal line, and the third signal line is connected to the exposed area of ​​the first vibrating part.

4. The vibration device according to claim 1, wherein, Each of the first vibrating part and the second vibrating part includes: Including the vibrating layer of piezoelectric materials; The first electrode layer at the first surface of the vibration layer; and A second electrode layer located on a second side that is different from the first side of the vibration layer.

5. The vibration device according to claim 4, wherein, The first electrode layer of the second vibration part contacts the second electrode layer of the first vibration part.

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

7. The vibration device according to claim 5, wherein, The second vibration section includes a cutout portion that exposes a portion of the second electrode layer of the first vibration section; The vibration generating unit further includes a wire connecting member, which connects one of the first signal line, the second signal line, and the third signal line to the second electrode layer of the first vibration unit, exposed by the cut portion of the second vibration unit; and One of the first signal line, the second signal line, and the third signal line is connected to the second electrode layer of the first vibrating part, which is exposed by the cut portion of the second vibrating part, via the line connecting member.

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

9. The vibration device according to claim 1, wherein, The vibration generating part further includes an adhesive component between the outer periphery of the first vibration part and the outer periphery of the second vibration part.

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

11. The vibration device according to claim 10, wherein, The vibration generating part further includes an adhesive member between the peripheral portion of the first vibration part and the peripheral portion of the second vibration part, and The adhesive component includes one or more separate portions communicating with the one or more slits.

12. The vibration device according to claim 4, wherein, The vibration generating section further includes an 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 part further includes a contact member between the first vibration part and the second vibration part.

14. The vibration device according to claim 13, wherein, The contact component is a conductive double-sided adhesive component.

15. The vibration device according to claim 13, wherein, The contact member includes a protrusion extending from the vibration generating portion, and One of the first signal line, the second signal line, and the third signal line is connected to a portion of the protrusion.

16. The vibration device according to claim 1, wherein, The vibration generating unit further includes a third vibration unit overlapping the first vibration unit, and The signal cable also includes a fourth signal line connected to the third vibration unit.

17. The vibration device according to claim 16, wherein, Each of the first vibration part, the second vibration part, and the third vibration part includes: Including the vibrating layer of piezoelectric materials; The first electrode layer at the first surface of the vibration layer; and A second electrode layer located on a second side that is different from the first side of the vibration layer.

18. The vibration device according to claim 17, wherein, The first electrode layer of the second vibration part contacts the second electrode layer of the first vibration part, and The first electrode layer of the first vibration part contacts the second electrode layer of the third vibration part.

19. The vibration device according to claim 17, wherein, The second vibration section includes a first cutout portion that exposes a first region of the second electrode layer of the first vibration section, and 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 vibration device according to claim 19, wherein, The first signal line is connected to the portion of the first electrode layer of the first vibrating part that is exposed by the second cut portion of the third vibrating part. The second signal line is connected to the second electrode layer of the second vibration section. The third signal line is connected to the portion of the second electrode layer of the first vibrating part that is exposed by the first cut portion of the second vibrating part, and The fourth signal line is connected to the first electrode layer of the third vibration section.

21. The vibration device according to claim 20, wherein, The vibration generating unit further includes: A first wire connection member connects the first signal line to the portion of the first electrode layer of the first vibrating part exposed by the second cutout portion of the third vibrating part; and The second wire connection member connects the third signal line to the portion of the second electrode layer of the first vibration unit that is exposed by the first cutout portion of the second vibration unit. The first signal line is connected via the first line connecting member to the portion of the first electrode layer of the first vibrating part exposed by the second cutout portion of the third vibrating part, and The third signal line is connected to the portion of the second electrode layer of the first vibration part exposed by the first cut portion of the second vibration part via the second line connecting member.

22. The vibration device according to claim 16, wherein, The vibration generating unit further includes: A first adhesive component between the peripheral portion of the first vibrating part and the peripheral portion of the second vibrating part; and A second adhesive component between the outer periphery of the first vibrating part and the outer periphery of the third vibrating part.

23. The vibration device according to claim 17, wherein, 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 include one or more slits.

24. The vibration device according to claim 23, wherein, The vibration generating unit further includes: A first adhesive component between the peripheral portion of the first vibrating part and the peripheral portion of the second vibrating part; and A second adhesive component between the outer periphery of the first vibrating part and the outer periphery of the third vibrating part. Each of the first adhesive component and the second adhesive component includes one or more separate portions communicating with the one or more slits.

25. The vibration device according to claim 17, wherein, The vibration generating unit further includes: A first adhesive layer between the second electrode layer of the first vibrating part and the first electrode layer of the second vibrating part; and A second adhesive layer between the first electrode layer of the first vibration part and the second electrode layer of the third vibration part.

26. The vibration device according to claim 16, wherein, The vibration generating unit further includes: The first contact member between the first vibrating part and the second vibrating part; and A second contact member between the first vibrating part and the third vibrating part.

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

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

29. A device for vibration, comprising: Passive vibration components; as well as A vibration generating device is connected to the passive vibration member to cause the passive vibration member to vibrate. The vibration generating device includes the vibration device according to any one of claims 1 to 28.

30. The apparatus of claim 29 further includes a housing at the rear surface of the passive vibration member for covering the vibration generating device.

31. The apparatus according to claim 29, wherein, The passive vibration component includes one or more of the following: metal, plastic, paper, fiber, fabric, leather, wood, rubber, glass, and carbon.

32. The apparatus according to claim 29, wherein, The passive vibration component includes one or more of the following: a pixel-containing display panel configured to display images, a screen panel on which images are projected from a display device, a light-emitting diode illumination panel, a sign panel, interior materials of a motor vehicle, exterior materials of a motor vehicle, interior materials of a building, glass windows of a building, interior materials of an aircraft, glass windows of an aircraft, and mirrors.

33. The apparatus according to claim 29, wherein, The passive vibration component includes one or more of the following: organic light-emitting lighting panels, inorganic light-emitting lighting panels, motor vehicle windows, motor vehicle seat interior materials, and building ceiling materials.

34. A device for vibration, comprising: Passive vibration components; Connecting components; as well as A vibration generating device, which is connected to the passive vibration member via the connecting member to cause the passive vibration member to vibrate. The vibration generating device includes the vibration device according to any one of claims 1 to 28.

35. The apparatus according to claim 34, wherein, The connecting member is connected between the passive vibration member and the central portion of the vibration generating device, and The peripheral portion of the vibration generating device is spaced apart from each of the connecting member and the passive vibration member and is lifted without being connected to the connecting member and / or the passive vibration member.

36. The apparatus according to claim 34, wherein, The connecting member includes a material comprising an adhesive layer, and The connecting member is connected to or attached to the entire front surface of the vibration generating device and the rear surface of the passive vibration member.

Images