Vibration device and electronic apparatus including same

Abstract

The invention provides a vibration device and electronic equipment comprising the same. A vibration device according to one or more embodiments of the present disclosure includes: a vibration generating portion including: a plurality of electrode layers; a plurality of vibration layers between the plurality of electrode layers, the plurality of vibration layers including a piezoelectric material; a first connection member configured to be electrically connected to a first group of electrode layers among the plurality of electrode layers; and a second connection member configured to be electrically connected to a second group of electrode layers among the plurality of electrode layers. Each of the plurality of electrode layers is configured to have a shape different from a shape of each of the plurality of vibration layers and a size smaller than a size of each of the plurality of vibration layers.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to Korean Patent Application No. 10-2023-0133197, filed on October 6, 2023, which is hereby incorporated by reference into this application for all purposes as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a vibration device and an electronic device including the vibration device. Background Art

[0004] Electronic devices include separate speakers or sound devices that provide sound. When speakers are incorporated into electronic devices, they occupy space, limiting the design and spatial arrangement of the electronic device. Speakers used in electronic devices can be actuators, for example, that include a magnet and a coil. When actuators are incorporated into electronic devices, the device becomes thicker. Consequently, piezoelectric devices for achieving thinner electronic devices have attracted considerable attention.

[0005] Because the piezoelectric constant of a piezoelectric device is proportional to the dielectric constant of the piezoelectric material, for a piezoelectric material with a relatively strong driving force (or displacement force), the dielectric constant increases together with the piezoelectric constant, and thus, the capacitance also increases. In this case, since the capacitance is greater than the allowable capacitance of the drive circuit for driving the piezoelectric device, the drive circuit cannot be configured, or expensive circuit components should be used. For example, in a vehicle piezoelectric device having a temperature range higher than that of an ordinary electronic device, as the temperature increases, the capacitance increases together with the dielectric constant, and thus, as the temperature for ensuring reliability increases, there are limitations on the use of the piezoelectric device. For example, in a piezoelectric device, since the impedance gradually decreases as the frequency increases to a high frequency, the current increases, and thus, the current increases at a high frequency, resulting in a problem in which the piezoelectric device is susceptible to the heat generated in the drive circuit (or the heat generated in the circuit). Summary of the Invention

[0006] The inventors of the present disclosure have conducted various studies and experiments to realize a vibration device that can have a strong driving force or a large displacement force and can have a relatively low capacitance. Based on the various studies and experiments, the inventors have invented a vibration device having a new structure that can have a strong driving force or a large displacement force and can have a relatively low capacitance, and an electronic device including the vibration device.

[0007] One aspect of the present disclosure is to provide a vibration device that may have a strong driving force or a large displacement force and may have a relatively low capacitance, and an electronic device including the vibration device.

[0008] Another aspect of the present disclosure is to provide a vibration device that can generate less heat and can be driven by a low-cost driving circuit, and an electronic device including the vibration device.

[0009] Another aspect of the present disclosure is to provide a vibration device and an electronic device including the vibration device that can simplify the manufacturing process and structure.

[0010] Another aspect of the present disclosure is directed to providing a vibration device that can be connected to a signal providing member without a welding process and an electronic device including the same.

[0011] Another aspect of the present disclosure is directed to providing a vibration device in which a signal providing member is integrated and an electronic device including the vibration device.

[0012] Additional features, advantages, and aspects will be set forth in the following description, and in part will be apparent from the description, or may be learned by practicing the inventive concepts provided herein. Other features, advantages, and aspects of the inventive concepts may be realized and obtained through the structure particularly pointed out or derived from the written description, as well as the claims and drawings thereof.

[0013] To achieve these and other advantages and aspects of the present disclosure, as embodied and broadly described herein, in one or more aspects, a vibration device includes: a vibration generating portion, the vibration generating portion including: a plurality of electrode layers; a plurality of vibration layers between the plurality of electrode layers, the plurality of vibration layers including piezoelectric material; a first connecting member configured to electrically connect to electrode layers in a first group among the plurality of electrode layers; and a second connecting member configured to electrically connect to electrode layers in a second group among the plurality of electrode layers. Each of the plurality of electrode layers is configured to have a shape different from that of each of the plurality of vibration layers and a size smaller than that of each of the plurality of vibration layers.

[0014] In one or more aspects, an electronic device includes: a passive vibration member; and one or more vibration generating devices configured to vibrate the passive vibration member, the one or more vibration generating devices comprising: a vibration device including a vibration generating portion, the vibration generating portion including: a plurality of electrode layers; a plurality of vibration layers between the plurality of electrode layers, the plurality of vibration layers including piezoelectric material; a first connecting member configured to electrically connect to electrode layers in a first group among the plurality of electrode layers; and a second connecting member configured to electrically connect to electrode layers in a second group among the plurality of electrode layers. Each of the plurality of electrode layers is configured to have a shape different from that of each of the plurality of vibration layers and a size smaller than that of each of the plurality of vibration layers.

[0015] Details of other exemplary embodiments are included in the detailed description and drawings of the present disclosure.

[0016] According to one or more embodiments of the present disclosure, a vibration device having a strong driving force or a large displacement force and a relatively low capacitance and an electronic device including the vibration device may be provided.

[0017] According to one or more embodiments of the present disclosure, a vibration device that generates less heat and can be driven by a low-cost driving circuit, and an electronic device including the vibration device can be provided.

[0018] According to one or more embodiments of the present disclosure, the structure and manufacturing process of a vibration device may be simplified.

[0019] According to one or more embodiments of the present disclosure, a signal providing member and a vibration device may be electrically connected to each other without a welding process.

[0020] According to one or more embodiments of the present invention, since the signal providing member and the vibration device are provided as one body, the signal providing member and the vibration device may be configured as one part (or one element or one component).

[0021] It is to be understood that both the foregoing description and the following description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate aspects of the disclosure and together with the description serve to explain the principles of the disclosure.

[0023] Figure 1 A vibration device according to an embodiment of the present disclosure is illustrated.

[0024] Figure 2 Illustrated according to an embodiment of the present disclosure Figure 1 The vibration generating section shown in .

[0025] Figure 3 According to the embodiment of the present disclosure Figure 2 An exploded perspective view of the vibration unit and electrode unit shown in FIG.

[0026] Figure 4 According to the embodiment of the present disclosure Figure 2 A cross-sectional view taken along line AA' shown in FIG.

[0027] Figure 5 According to the embodiment of the present disclosure Figure 2 A cross-sectional view taken along line BB' shown in FIG.

[0028] Figure 6 According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line CC' shown in FIG.

[0029] Figure 7 According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line DD' shown in FIG.

[0030] Figure 8 A vibration device according to another embodiment of the present disclosure is illustrated.

[0031] Figure 9 Illustrated according to an embodiment of the present disclosure Figure 8 The vibration generating section shown in .

[0032] Figure 10 A vibration device according to another embodiment of the present disclosure is illustrated.

[0033] Figure 11 Illustrated according to an embodiment of the present disclosure Figure 10 The vibration generating section shown in .

[0034] Figure 12 Illustrated according to an embodiment of the present disclosure Figure 10 and Figure 11 The electrode portion shown in .

[0035] Figure 13 A vibration device according to another embodiment of the present disclosure is illustrated.

[0036] Figure 14 Illustrated according to an embodiment of the present disclosure Figure 13 The vibration generating section shown in .

[0037] Figure 15 Illustrated according to an embodiment of the present disclosure Figure 13 and Figure 14 The electrode portion shown in .

[0038] Figure 16 A vibration device according to another embodiment of the present disclosure is illustrated.

[0039] Figure 17 Illustrated according to an embodiment of the present disclosure Figure 16 The vibration generating section shown in .

[0040] Figure 18 A vibration device according to another embodiment of the present disclosure is illustrated.

[0041] Figure 19 Illustrated according to an embodiment of the present disclosure Figure 18 The vibration generating section shown in .

[0042] Figure 20 A vibration device according to another embodiment of the present disclosure is illustrated.

[0043] Figure 21 Illustrated according to an embodiment of the present disclosure Figure 20 The vibration generating section shown in .

[0044] Figure 22 Illustrated according to an embodiment of the present disclosure Figure 20 and Figure 21 The electrode portion shown in .

[0045] Figure 23 A vibration device according to another embodiment of the present disclosure is illustrated.

[0046] Figure 24 Illustrated according to an embodiment of the present disclosure Figure 23 The vibration generating section shown in .

[0047] Figure 25 Illustrated in accordance with an embodiment of the present disclosure Figure 23 and Figure 24 The electrode portion shown in .

[0048] Figure 26 A vibration device according to another embodiment of the present disclosure is illustrated.

[0049] Figure 27 Illustrated according to an embodiment of the present disclosure Figure 26 The vibration generating section shown in .

[0050] Figure 28 Illustrated according to an embodiment of the present disclosure Figure 26 and Figure 27 The electrode portion shown in .

[0051] Figure 29 A vibration device according to another embodiment of the present disclosure is illustrated.

[0052] Figure 30 Illustrated according to an embodiment of the present disclosure Figure 29 The vibration generating section shown in .

[0053] Figure 31 Illustrated according to an embodiment of the present disclosure Figure 29 and Figure 30 The electrode portion shown in .

[0054] Figure 32 A vibration device according to another embodiment of the present disclosure is illustrated.

[0055] Figure 33 Illustrated according to an embodiment of the present disclosure Figure 32 The vibration generating section shown in .

[0056] Figure 34 Illustrated according to an embodiment of the present disclosure Figure 32 and Figure 33 The electrode portion shown in .

[0057] Figure 35 A vibration device according to another embodiment of the present disclosure is illustrated.

[0058] Figure 36 Illustrated according to an embodiment of the present disclosure Figure 35 The vibration generating section shown in .

[0059] Figure 37 Illustrated according to an embodiment of the present disclosure Figure 35 and Figure 36 The electrode portion shown in .

[0060] Figure 38 A vibration generating portion of a vibration device according to another embodiment of the present disclosure is illustrated.

[0061] Figure 39 Illustrated according to an embodiment of the present disclosure Figure 38 The electrode portion and the bonding member shown in .

[0062] Figure 40 According to the embodiment of the present disclosure Figure 38 A cross-sectional view taken along line EE' shown in FIG.

[0063] Figure 41 According to the embodiment of the present disclosure Figure 38 A cross-sectional view taken along line FF' shown in FIG.

[0064] Figure 42 A vibration generating portion of a vibration device according to another embodiment of the present disclosure is illustrated.

[0065] Figure 43 Illustrated according to an embodiment of the present disclosure Figure 42 The electrode portion and the bonding member shown in .

[0066] Figure 44 According to the embodiment of the present disclosure Figure 44 A cross-sectional view taken along line GG' shown in FIG.

[0067] Figure 45 According to the embodiment of the present disclosure Figure 44 A cross-sectional view taken along line H-H' shown in FIG.

[0068] Figure 46 A vibration device according to an embodiment of the present disclosure is illustrated.

[0069] Figure 47 Illustrated according to an embodiment of the present disclosure Figure 46 The vibration generating section shown in .

[0070] Figure 48 According to the embodiment of the present disclosure Figure 47 An exploded perspective view of the vibration unit and electrode unit shown in FIG.

[0071] Figure 49 According to the embodiment of the present disclosure Figure 47 A cross-sectional view taken along line II' shown in FIG.

[0072] Figure 50 According to the embodiment of the present disclosure Figure 47 A cross-sectional view taken along line J-J' shown in FIG.

[0073] Figures 51A to 51I It illustrates a main vibration region having a vibration mode shape according to a frequency-dependent driving signal in the vibration device according to the experimental example.

[0074] Figure 52 An electronic device according to an embodiment of the present disclosure is illustrated.

[0075] Figure 53 According to the embodiment of the present disclosure Figure 52 A cross-sectional view taken along line K-K' shown in FIG.

[0076] Throughout the drawings and detailed description, unless otherwise described, the same drawing reference numerals should be understood to refer to the same elements, features, and structures. The size, length, and thickness of layers, regions, and elements, and their descriptions may be exaggerated for clarity, illustration, and / or convenience. DETAILED DESCRIPTION

[0077] The shapes, sizes, ratios, angles, and quantities disclosed in the accompanying drawings for describing embodiments of the present disclosure are merely examples, and the present disclosure is not limited to the details shown. Like reference numerals denote like elements throughout. In the following description, when a detailed description of a related known function or configuration is determined to unnecessarily obscure the key points of the present disclosure, the detailed description will be omitted.

[0078] Where “including,” “having,” and “comprising” are used in the present application, another part may be added unless “only” is used. Terms in the singular form may include plural forms unless otherwise noted.

[0079] In interpreting the elements, even if not explicitly described, the elements are interpreted as including the margin of error.

[0080] When describing a positional relationship, for example, when the positional relationship between two components is described as "on," "above," "below," and "next," one or more other components may be provided between the two components unless "just" or "directly" is used.

[0081] When describing a temporal relationship, for example, when a temporal order is described as "after," "subsequently," "next," and "before," discontinuous cases may be included unless "just" or "directly" is used.

[0082] 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 only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element without departing from the scope of this disclosure.

[0083] When describing elements of the present disclosure, the terms "first," "second," "A," "B," "(a)," "(b)," etc. may be used. These terms are intended to identify corresponding elements from other elements, and these terms are not used to limit the nature, basis, order, or quantity of the elements. For statements that an element is "connected," "coupled," or "contacting" another element, unless otherwise specified, the element may be connected, coupled, or contacted not only directly but also indirectly with one or more intermediate elements interposed therebetween.

[0084] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, the meaning of "at least one of the first, second, and third items" means all combinations of items listed from two or more of the first, second, and third items; as well as the first, second, or third item.

[0085] As will be fully understood by those skilled in the art, the features of the various embodiments of the present disclosure may be combined or combined with each other in part or in whole, and may perform various interoperations and be driven technically. The embodiments of the present disclosure may be implemented independently of each other or may be implemented together in a co-dependent relationship.

[0086] Hereinafter, exemplary embodiments of a vibration device and an electronic device according to the present disclosure will be described in detail with reference to the accompanying drawings. For ease of description, the proportions of various elements shown in the drawings are different from the actual proportions and are therefore not limited to the proportions shown in the drawings.

[0087] Figure 1 A vibration device according to an embodiment of the present disclosure is illustrated. Figure 2 Illustrated according to an embodiment of the present disclosure Figure 1 The vibration generating section shown in . Figure 3 According to the embodiment of the present disclosure Figure 2 An exploded perspective view of the vibration unit and electrode unit shown in FIG. Figure 4 According to the embodiment of the present disclosure Figure 2 A cross-sectional view taken along line AA' shown in FIG. Figure 5 According to the embodiment of the present disclosure Figure 2 A cross-sectional view taken along line BB' shown in FIG.

[0088] Reference Figures 1 to 3 , the vibration device 100 according to the embodiment (or the first embodiment) of the present disclosure may include a vibration generating part 110 .

[0089] The vibration generating unit 110 may be configured to vibrate based on a drive signal (or sound signal or voice signal). For example, the vibration generating unit 110 may include a first surface 110a and a second surface 110b opposite to the first surface 110a. In the vibration generating unit 110, the first surface 101a may be an upper surface, a front surface, an uppermost electrode layer, an uppermost electrode portion, or an uppermost electrode surface, but embodiments of the present disclosure are not limited thereto. The second surface 10b may be a lower surface, a back surface, a rear surface, a lowermost electrode layer, an lowermost electrode portion, or an lowermost electrode surface, but embodiments of the present disclosure are not limited thereto.

[0090] The vibration generating part 110 may include a vibration part 111 , an electrode part 113 , a first connection member 118A, and a second connection member 118B.

[0091] The vibration portion 111 may be configured to vibrate based on a drive signal (or a sound signal or a voice signal). The vibration portion 111 may include a plurality of vibration layers 111-1 to 111-4. For example, the vibration portion 111 may include a plurality of vibration layers 111-1 to 111-4 that overlap or stack each other. For example, the vibration portion 111 may include a plurality of (or two or more) vibration layers 111-1 to 111-4 that overlap or stack to displace in the same direction. For example, the vibration portion 111 may be a piezoelectric vibration portion, a displacement portion, a stacked vibration portion, a stacked piezoelectric portion, a stacked vibration device, or a stacked ceramic portion, but the embodiments of the present disclosure are not limited thereto.

[0092] The vibration unit 111 according to an embodiment of the present disclosure may include a first vibration layer 111-1 to an N-th vibration layer 111-4 (where N may be a natural number of 2 or greater). Hereinafter, when describing an embodiment of the present disclosure, for ease of description, an example in which the vibration unit includes the first vibration layer 111-1 to the fourth vibration layer 111-4 will be described, but the embodiments of the present disclosure are not limited thereto.

[0093] The first to fourth vibration layers 111-1 to 111-4 can overlap or be stacked so as to displace (or be driven or vibrate) in the same direction along the third direction Z or the thickness direction of the vibration generating unit 110. For example, when the first to fourth vibration layers 111-1 to 111-4 are stacked or overlapped, each of the first to fourth vibration layers 111-1 to 111-4 can contract or expand in the same driving direction (or displacement direction or vibration direction) based on the driving signal. This can increase or maximize the displacement (or bending force) or amplitude displacement of the vibration generating unit 110 or the vibration device 100. Consequently, the first to fourth vibration layers 111-1 to 111-4 can increase (or maximize) the displacement (or bending force) or amplitude displacement of the vibration generating unit 110 or the vibration device 100, thereby enhancing the sound pressure level characteristics of the sound generated by the vibration generating unit 110 or the vibration device 100 and the sound characteristics of the mid- and low-pitched vocal ranges. For example, the mid-low pitch vocal range may be 200 Hz to 1 kHz, but embodiments of the present disclosure are not limited thereto. For example, the high pitch vocal range may be 1 kHz or greater, or 3 kHz or greater, but embodiments of the present disclosure are not limited thereto.

[0094] Each of the first to fourth vibration layers 111-1 to 111-4 may include a piezoelectric material (or electroactive material) having a piezoelectric effect. For example, a piezoelectric material may have a characteristic in which, when pressure or distortion (or bending) is applied to a crystal structure by an external force, a potential difference occurs due to dielectric polarization caused by a change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field based on a reverse voltage applied thereto. For example, each of the first to fourth vibration layers 111-1 to 111-4 may be referred to as a piezoelectric layer, a piezoelectric material layer, a piezoelectric inorganic layer, a displacement layer, a piezoelectric vibration layer, a piezoelectric green sheet, a piezoelectric ceramic layer, an electroactive layer, or a piezoelectric structural layer, but embodiments of the present disclosure are not limited thereto.

[0095] Each of the first to fourth vibration layers 111 - 1 to 111 - 4 may be configured as a ceramic-based material capable of achieving relatively strong vibration, or may be configured as piezoelectric ceramics having a perovskite-type crystal structure.

[0096] The piezoelectric ceramic may be configured as a single crystal ceramic having a crystal structure, or may be configured as a ceramic material or polycrystalline ceramic having a polycrystalline structure. The piezoelectric material including single crystal ceramics may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO, but the embodiments of the present disclosure are not limited thereto. The piezoelectric material including polycrystalline ceramics may include a lead zirconate titanate (PZT)-based material, which includes lead (Pb), zirconium (Zr), and titanium (Ti); or may include a lead zirconate titanate nickel niobate (PZNN)-based material, which includes lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but the embodiments of the present disclosure are not limited thereto. For example, the vibration layer 111 may include at least one or more of calcium titanate (CaTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3), without lead (Pb), but the embodiments of the present disclosure are not limited thereto.

[0097] The vibration layer 111 according to an embodiment of the present disclosure may include a piezoelectric sintered material (or piezoelectric ceramic or piezoelectric green sheet) manufactured by sintering (or firing) piezoelectric powder (or ceramic powder) at a high sintering (or firing) temperature of 1200° C. or higher, but the embodiments of the present disclosure are not limited thereto. For example, the piezoelectric sintered material may be manufactured by performing a high-temperature sintering process on the piezoelectric powder.

[0098] The plurality of vibration layers or the first to fourth vibration layers 111-1 to 111-4 may have a thickness of 70 μm to 180 μm to thin the vibration device 100 or the vibration generating unit 110, but the embodiments of the present disclosure are not limited thereto. For example, the plurality of first to fourth vibration layers 111-1 to 111-4 may have a thickness of 80 μm to 165 μm, thereby enabling the vibration device 100 or the vibration generating unit 110 to have a relatively thin thickness.

[0099] Each of the first to fourth vibration layers 111-1 to 111-4 according to an embodiment of the present disclosure may have a quadrilateral shape, for example, a two-dimensional rectangular shape. For example, each of the first to fourth vibration layers 111-1 to 111-4 may have a rectangular shape in a plan view. For example, each of the first to fourth vibration layers 111-1 to 111-4 may include a first surface 111s1 and a second surface 111s2 opposite to the first surface 111s1. For example, in each of the first to fourth vibration layers 111-1 to 111-4, the first surface 111s1 may be an upper surface or front surface, and the second surface 111s2 may be a lower surface, a back surface, or a rear surface.

[0100] Each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4 may include a rectangular shape having a short side SS and a long side LS. For example, the short side SS of each of the first and second surfaces 111s1 and 111s2 may be parallel to a first direction X, and the long side of each of the first and second surfaces 111s1 and 111s2 may be parallel to a second direction Y intersecting the first direction X, but embodiments of the present disclosure are not limited thereto. For example, the first direction X may be the length direction of the short side, the width direction, or the horizontal direction of the vibration device 100 or the vibration generating unit 110, and the second direction Y may be the length direction of the long side, the length direction, or the vertical direction of the vibration device 100 or the vibration generating unit 110, but embodiments of the present disclosure are not limited thereto. For example, the second direction Y may be the short side length direction, the width direction, or the vertical direction of the vibration device 100 or the vibration generating unit 110 , and the first direction X may be the long side length direction, the length direction, or the horizontal direction of the vibration device 100 or the vibration generating unit 110 , but the embodiments of the present disclosure are not limited thereto.

[0101] The vibration generating portion 110 and the vibration portion 111 according to an embodiment of the present disclosure may include an electrode region ER and a connection region CR. For example, each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4 according to an embodiment of the present disclosure may include an electrode region ER and a connection region CR.

[0102] The electrode region ER may have a relatively larger size than the connection region CR. The electrode region ER may include a central portion of each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4. The connection region CR may include an edge portion (or a peripheral portion) of each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4. For example, the connection region CR may be an edge portion (or a peripheral portion) adjacent to a short side (or first short side) of the vibration generating portion 110. For example, the electrode region ER may be a main vibration region of the vibration generating portion 110 or the vibration portion 111. For example, the connection region CR may be a signal receiving region from a driving circuit, or may be a circuit connection region between the vibration generating portion 110 and the driving circuit.

[0103] Each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4 may include a first region R1, a second region R2, a first region R3, and a first region R4. For example, the electrode region ER of each of the first to fourth vibration layers 111-1 to 111-4 may include a first region R1, a second region R2, a first region R3, and a fourth region R4, but embodiments of the present disclosure are not limited thereto.

[0104] The first region R1, the second region R2, the third region R3, and the fourth region R4 may be parallel to the first direction X. Each of the first region R1, the second region R2, the third region R3, and the fourth region R4 may be a horizontal region, a partitioned region, or a horizontally partitioned region. The first region R1 may be disposed adjacent to the connection region CR. For example, the first region R1 may be a first edge portion (or a first peripheral portion) adjacent to one short side (or a first short side) of the vibration generating portion 110.

[0105] The second region R2 and the third region R3 may be the middle region MR. The second region R2 may be the first middle region. The third region R3 may be the second middle region. The first region R1 may be a region in the middle region MR or a first edge region (or first peripheral region) or a lower region of the middle region MR.

[0106] The fourth region R4 may be disposed adjacent to the other side of the middle region MR. For example, the fourth region R4 may be a second edge portion (or second peripheral portion) adjacent to the other short side (or second short side) of the vibration generating portion 110. The fourth region R4 may be another region in the middle region MR or the second edge region (or second peripheral region), or an upper region of the middle region MR.

[0107] Each of the first region R1, the second region R2, the third region R3, and the fourth region R4 may have the same size in two dimensions. For example, the electrode region ER may be divided into the first region R1, the second region R2, the third region R3, and the fourth region R4 having the same size. For example, the connection region CR may be the region between one short side (or the first short side) of the vibration generating portion 110 and the first region R1.

[0108] The electrode portion 113 may be configured to be electrically connected to each of the first surface 111s1 and the second surface 111s2 of each of the first to fourth vibration layers 111-1 to 111-4. The electrode portion 113 may include a plurality of electrode layers 113-1 to 113-5. For example, the vibration device 100 according to an embodiment of the present disclosure may include a plurality of electrode layers 113-1 to 113-5, and a plurality of vibration layers 111-1 to 111-4, each including a piezoelectric material, positioned between the plurality of electrode layers 113-1 to 113-5.

[0109] The plurality of electrode layers 113-1 to 113-5 may include first to Mth (where M may be N+1) electrode layers 113-1 to 113-5. In the following description, an example in which the first to Mth electrode layers are the first to fifth electrode layers 113-1 to 113-5 will be described, but embodiments of the present disclosure are not limited thereto.

[0110] Each of the first to fifth electrode layers 113-1 to 113-5 may have a shape different from that of each of the first to fourth vibration layers 111-1 to 111-4 and may have a size smaller than that of each of the first to fourth vibration layers 111-1 to 111-4. For example, based on electrode patterning (or electrode pattern structure) for reducing the capacitance of the vibration device 100 or the vibration generating unit 110, each of the first to fifth electrode layers 113-1 to 113-5 may have a shape different from that of each of the first to fourth vibration layers 111-1 to 111-4 and may have a size smaller than that of each of the first to fourth vibration layers 111-1 to 111-4. For example, each of the first to fifth electrode layers 113-1 to 113-5 may correspond to a primary vibration region according to the frequency-dependent vibration characteristics (or vibration mode shape) of the vibration device 100 or the vibration generating unit 110, or may have a shape and / or size corresponding to both the primary vibration region and the effective vibration region.

[0111] According to an embodiment of the present disclosure, each of the first to fourth vibration layers 111-1 to 111-4 may have a quadrilateral shape, for example, a two-dimensional rectangular shape. For example, each of the first to fourth vibration layers 111-1 to 111-4 may have a rectangular shape in a plan view. Each of the first to fifth electrode layers 113-1 to 113-5 may have a non-quadrilateral shape in a two-dimensional manner. For example, each of the first to fifth electrode layers 113-1 to 113-5 may have a non-quadrilateral shape in a plan view. For example, based on electrode patterning, each of the first to fifth electrode layers 113-1 to 113-5 may have a non-quadrilateral shape in a two-dimensional manner.

[0112] According to an embodiment of the present disclosure, the size of each of the first to fifth electrode layers 113-1 to 113-5 may be 40% to 90% of the size of each of the first to fourth vibration layers 111-1 to 111-4. Therefore, the size of each of the first to fifth electrode layers 113-1 to 113-5 may be smaller than the size of the first to fourth vibration layers 111-1 to 111-4, thereby reducing the capacitance of the vibration device 100 or the vibration generating unit 110 compared to a structure in which the electrode layers and the vibration layers have the same size and shape.

[0113] Compared to the vibration generating portion according to the experimental example, which includes a vibration layer having a reference thickness and a reference size, and upper and lower electrode layers having the same size as the vibration layer, when the thickness of the vibration layer is reduced, the capacitance can be increased, and when the size (or area) of the electrode layer is reduced, the capacitance can be reduced. Therefore, compared to the vibration generating portion according to the experimental example, the thickness of each of the first vibration layer 111-1 to the fourth vibration layer 111-4 can be reduced, and the size of each of the first electrode layer 113-1 to the fifth electrode layer 113-5 can be reduced. Therefore, the vibration device 100 or the vibration generating portion 110 according to the embodiment of the present disclosure can have a capacitance lower than or similar to that of the experimental example.

[0114] According to one embodiment of the present disclosure, each of the first to fifth electrode layers 113-1 to 113-5 may include a plurality of sides 113s. In each of the first to fifth electrode layers 113-1 to 113-5, one or more sides 113s1 and 113s2 among the plurality of sides 113s may include one or more protrusions or one or more recesses. Thus, each of the first to fifth electrode layers 113-1 to 113-5 may have a non-quadrilateral shape in a plan view.

[0115] According to one embodiment of the present disclosure, each of the first to fifth electrode layers 113-1 to 113-5 may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. For example, the ratio of the size of the main electrode 113a to the size of the one or more sub-electrodes 113b may be 10:8 to 10:2. Therefore, compared with a structure in which the electrode layer and the vibration layer have the same size and shape, the capacitance of the vibration device 100 or the vibration generating portion 110 can be reduced.

[0116] The first electrode layer 113-1 may be disposed (or configured) on the first surface 110a of the vibration generating portion 110. The first electrode layer 113-1 may be disposed (or configured) on the first surface 111s1 of the first vibration layer 111-1. The first electrode layer 113-1 may be electrically connected to the first surface 111s1 of the first vibration layer 111-1. For example, the first electrode layer 113-1 may be the highest electrode layer or the uppermost electrode layer, but embodiments of the present disclosure are not limited thereto.

[0117] The second electrode layer 113-2 may be disposed or interposed between the first vibration layer 111-1 and the second vibration layer 111-2. The second electrode layer 113-2 may be electrically connected to each of the second surface 111s2 of the first vibration layer 111-1 and the first surface 111s1 of the second vibration layer 111-2. For example, the second electrode layer 113-2 may be a first intermediate electrode layer, a first internal electrode layer, or a first common electrode layer, but embodiments of the present disclosure are not limited thereto.

[0118] The third electrode layer 113-3 may be disposed or interposed between the second vibration layer 111-2 and the third vibration layer 111-3. The third electrode layer 113-3 may be electrically connected to each of the second surface 111s2 of the second vibration layer 111-2 and the first surface 111s1 of the third vibration layer 111-3. For example, the third electrode layer 113-3 may be a second intermediate electrode layer, a second internal electrode layer, or a second common electrode layer, but embodiments of the present disclosure are not limited thereto.

[0119] The fourth electrode layer 113-4 may be disposed or interposed between the third vibration layer 111-3 and the fourth vibration layer 111-4. The fourth electrode layer 113-4 may be electrically connected to each of the second surface 111s2 of the third vibration layer 111-3 and the first surface 111s1 of the fourth vibration layer 111-4. For example, the fourth electrode layer 113-4 may be a third intermediate electrode layer, a third internal electrode layer, or a third common electrode layer, but embodiments of the present disclosure are not limited thereto.

[0120] The fifth electrode layer 113-5 may be disposed on the second surface 110b of the vibration generating portion 110. The fifth electrode layer 113-5 may be disposed on the second surface 111s2 of the fourth vibration layer 111-4. For example, the fifth electrode layer 113-5 may be the lowest or bottommost electrode layer, but the embodiments of the present disclosure are not limited thereto.

[0121] The first to fifth electrode layers 113 - 1 to 113 - 5 may overlap or be superimposed on one another along the third direction Z or the thickness direction of the vibration generating portion 110 .

[0122] According to one embodiment of the present disclosure, the plurality of first electrode layers 113-1 to fifth electrode layers 113-5 may include or be grouped into a first group (or electrode group) 113G1 and a second group (or electrode group) 113G2. The electrode layers 113-2 and 113-4 in the second group 113G2 may be disposed (or interposed) between the electrode layers 113-1, 113-3, and 113-5 in the first group 113G1. For example, the first group 113G1 may include the odd-numbered electrode layers 113-1, 113-3, and 113-5 in the first electrode layer 113-1 to fifth electrode layer 113-5. The second group 113G2 may include the even-numbered electrode layers 113-2 and 113-4 in the first electrode layer 113-1 to fifth electrode layer 113-5. For example, the first group 113G1 may include a first electrode layer 113-1, a third electrode layer 113-3, and a fifth electrode layer 113-5, and the second group 113G2 may include a second electrode layer 113-2 and a fourth electrode layer 113-4, but embodiments of the present disclosure are not limited thereto. For example, the first group 113G1 may include even-numbered electrode layers 113-2 and 113-4, and the second group 113G2 may include odd-numbered electrode layers 113-1, 113-3, and 113-5.

[0123] According to an embodiment of the present disclosure, in order to prevent electrical short circuits between the first to fifth electrode layers 113-1 to 113-5, each of the first to fifth electrode layers 113-1 to 113-5 may be formed on portions other than the edge portions (or peripheral portions) of the corresponding vibration layers 111-1 to 111-4. For example, the side surfaces (or outer side walls) of the first to fifth electrode layers 113-1 to 113-5 may be separated from the side surfaces (or outer side walls) of the vibration layers 111-1 to 111-4 by a predetermined distance (or predetermined interval).

[0124] According to an embodiment of the present disclosure, the distance (or shortest distance) between the side surfaces (or outer side walls) of the electrode layers 113-1 to 113-5 and the side surfaces (or outer side walls) of the vibration layers 111-1 to 111-4 may be set (or adjusted) based on the thickness of the vibration layer 111, or may be set (or adjusted) based on the thickness of the vibration layers 111-1 to 111-4 and the process error when forming the electrode layers 113-1 to 113-5. For example, the distance (or shortest distance) between the side surfaces (or outer side walls) of the electrode layers 113-1 to 113-5 and the side surfaces (or outer side walls) of the vibration layers 111-1 to 111-4 may be greater than the thickness of the vibration layers 111-1 to 111-4, or it may be twice or more times the thickness of the vibration layers 111-1 to 111-4. For example, the distance (or shortest distance) between the side surfaces (or outer walls) of the electrode layers 113-1 to 113-5 and the side surfaces (or outer walls) of the vibration layers 111-1 to 111-4 may be at least 0.4 mm or greater, or at least 1 mm or greater, but the embodiments of the present disclosure are not limited thereto.

[0125] The electrode portion 113 according to an embodiment of the present disclosure may include a main electrode 113a and a sub-electrode 113b connected to the main electrode 113a. For example, each of the first electrode layer 113-1 to the fifth electrode layer 113-5 according to an embodiment of the present disclosure may include a main electrode 113a and a sub-electrode 113b protruding (or extending) from the main electrode 113a. For example, the main electrode 113a may be a main pattern electrode, a main electrode pattern, a pattern main electrode, or a first pattern electrode, but embodiments of the present disclosure are not limited thereto. For example, the sub-electrode 113b may be an auxiliary electrode, a pattern protruding electrode, a protruding pattern electrode, a protruding electrode, an extended electrode, a protruding portion, an extended portion, a pattern sub-electrode, or a second pattern electrode, but embodiments of the present disclosure are not limited thereto.

[0126] The main electrode 113a may be provided in the middle region MR or a portion of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. For example, the main electrode 113a may be provided in the second region R2 and the third region R3 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. For example, the main electrode 113a may have a size corresponding to the second region R2 and the third region R3 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. For example, the portion provided (configured) in the second region R2 and the third region R3 of the electrode region ER of the electrode layers 113-1 to 113-5 may be the main electrode 113a.

[0127] The sub-electrode 113b may be disposed (or configured) on the same plane as the main electrode 113a. For example, the sub-electrode 113b may be electrically connected to the main electrode 113a and may be disposed (or configured) in the same plane as the corresponding vibration layers 111-1 to 111-4 to have one or more shapes and sizes that are different from those of the main electrode 113a. For example, the sub-electrode 113b may protrude (or extend) from the main electrode 113a to have one or more shapes and sizes that are different from those of the main electrode 113a in the same plane as the corresponding vibration layers 111-1 to 111-4.

[0128] The sub-electrode 113b may be provided in each of the first region R1 and the fourth region R4 of the electrode regions ER of the corresponding vibration layers 111-1 to 111-4. The sub-electrode 113b may protrude (or extend) from the first side (or first short side) 113s1 and the second side (or second short side) 113s2 opposite the first side 113s1 of the main electrode 113a toward the first region R1 and the fourth region R4, respectively. For example, the sub-electrode 113b may protrude (or extend) from each of the first side 113s1 and the second side 113s2 of the main electrode 113a toward the side surfaces (or short sides) of the corresponding vibration layers 111-1 to 111-4. For example, the sub-electrode 113b may be provided (configured) in the first region R1 and the fourth region R4 of the electrode regions ER of the electrode layers 113-1 to 113-5.

[0129] According to an embodiment of the present disclosure, the total size of the main electrode 113a can be larger than the total size of the sub-electrode 113b in a two-dimensional (or plan) view. For example, the ratio of the size of the main electrode 113a to the size of the sub-electrode 113b can be 10:8 to 10:2 in a two-dimensional (or plan) view. Therefore, in each of the first to fourth vibration layers 111-1 to 111-4, the displacement (or bending force or amplitude) of the vibration of the middle region MR, referred to as the primary vibration region, can be maximized, and the capacitance of the vibration device 100 or the vibration generating portion 110 can be reduced compared to the vibration generating portion according to the above-described experimental example.

[0130] Each of the first to fifth electrode layers 113-1 to 113-5 or the sub-electrodes 113b according to an embodiment of the present disclosure may include a plurality of sub-electrodes 113b1, 113b2, 113b3, and 113b4. The plurality of sub-electrodes 113b1, 113b2, 113b3, and 113b4 may be disposed in each of the first region R1 and the fourth region R4 of the electrode regions ER of the corresponding vibration layers 111-1 to 111-4. The plurality of sub-electrodes 113b1, 113b2, 113b3, and 113b4 may protrude (or extend) from the first side 113s1 and the second side 113s2 of the main electrode 113a to each of the first region R1 and the fourth region R4. For example, the sub-electrodes 113b1, 113b2, 113b3, and 113b4 may be sub-line electrodes, protruding patterns, sub-line patterns, sub-electrode patterns, or extended patterns, but the embodiments of the present disclosure are not limited thereto.

[0131] Each of the first to fifth electrode layers 113 - 1 to 113 - 5 or the sub-electrodes 113 b according to an embodiment of the present disclosure may include first to fourth sub-electrodes 113 b 1 , 113 b 2 , 113 b 3 , and 113 b 4 .

[0132] The first sub-electrode 113b1 and the second sub-electrode 113b2 may be disposed in the electrode region ER adjacent to the connection region CR in the corresponding vibration layers 111-1 to 111-4 in the vibration generating portion 110 or the vibration portion 111. The first sub-electrode 113b1 and the second sub-electrode 113b2 may be disposed in the first region R1 of the electrode region ER adjacent to the connection region CR in the corresponding vibration layers 111-1 to 111-4. Each of the first sub-electrode 113b1 and the second sub-electrode 113b2 may protrude (or extend) in parallel from the first side 113s1 of the main electrode 113a toward the first region R1 of the electrode region ER.

[0133] The third sub-electrode 113b3 and the fourth sub-electrode 113b4 may be disposed in the fourth region R4 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. The third sub-electrode 113b3 and the fourth sub-electrode 113b4 may protrude (or extend) from the main electrode 113a of the corresponding vibration layers 111-1 to 111-4 in a direction opposite to the first sub-electrode 113b1 and the second sub-electrode 113b2. Each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4 may protrude (or extend) parallel to the second side 113s2 of the main electrode 113a toward the first region R1 of the electrode region ER.

[0134] The main electrode 113a may have a symmetrical structure with respect to one or more of a first direction X and a second direction Y passing through the central portion of the corresponding vibration layers 111-1 to 111-4. The first sub-electrodes 113b1 to the fourth sub-electrode 113b4 may have a symmetrical structure with respect to the main electrode 113a. The first sub-electrodes 113b1 to the fourth sub-electrode 113b4 may have a symmetrical structure with respect to one or more of the first direction X and the second direction Y passing through the central portion of the corresponding vibration layers 111-1 to 111-4. Due to the symmetry between the main electrode 113a and the first sub-electrodes 113b1 to the fourth sub-electrode 113b4, the driving signals applied to the electrode layers 113-1 to 113-5 can be uniformly applied to the corresponding vibration layers 111-1 to 111-4.

[0135] According to an embodiment of the present disclosure, in each of the first to fifth electrode layers 113-1 to 113-5, some of the plurality of sub-electrodes 113b1 to 113b4 disposed adjacent to the connection region CR of the plurality of sub-electrodes 113b1 to 113b4 may further extend (or protrude) into the connection region CR. For example, in each of the first to fifth electrode layers 113-1 to 113-5, the sub-electrodes 113b1 and 113b2 disposed in the first region R1 adjacent to the connection region CR of the plurality of sub-electrodes 113b1 and 113b2 may further extend (or protrude) into the connection region CR. The ends (or end surfaces) of the respective sub-electrodes 113b1 and 113b2 disposed in the connection region CR may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, one side surface (or one side wall) of each of the sub-electrodes 113 b 1 and 113 b 2 disposed in the connection region CR may be exposed at one side surface (or one short side) of the vibration generating part 110 or the electrode part 113 .

[0136] According to an embodiment of the present disclosure, in each of the first to fifth electrode layers 113-1 to 113-5, any one of the first sub-electrode 113b1 and the second sub-electrode 113b2 may further extend (or protrude) to the connection region CR. An end portion (or end surface) of any one of the first sub-electrode 113b1 and the second sub-electrode 113b2 disposed in the connection region CR may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, one side surface (or one sidewall) of any one of the first sub-electrode 113b1 and the second sub-electrode 113b2 disposed in the connection region CR may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113.

[0137] According to an embodiment of the present disclosure, in the first sub-electrodes 113b1 and the second sub-electrodes 113b2 of the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 of the first electrode layer 113-1 to the fifth electrode layer 113-5, the first sub-electrode 113b1 may further extend (or protrude) to the connection region CR, and the second sub-electrode 113b2 may not extend (or protrude) to the connection region CR. For example, the end portion (or end surface) of the first sub-electrode 113b1 may be exposed at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, the end portion (or end surface) of the first sub-electrode 113b1 disposed at the connection region CR may be exposed at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113.

[0138] According to an embodiment of the present disclosure, in the first sub-electrodes 113b1 and second sub-electrodes 113b2 of the electrode layers 113-2 and 113-4 included in the second group 113G2 of the first to fifth electrode layers 113-1 to 113-5, the second sub-electrodes 113b2 may further extend (or protrude) into the connection region CR, and the first sub-electrode 113b1 may not extend (or protrude) into the connection region CR. For example, the end portion (or end surface) of the second sub-electrode 113b2 may be exposed at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, the end portion (or end surface) of the second sub-electrode 113b2 disposed at the connection region CR may be exposed at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. Therefore, in the first to fifth electrode layers 113-1 to 113-5, the first sub-electrodes 113b1 and the second sub-electrodes 113b2 may have different lengths or different sizes.

[0139] In each of the first sub-electrodes 113b1 and the second sub-electrodes 113b2 of the first to fifth electrode layers 113-1 to 113-5, the portion located at the connection region CR may be an extension pattern 113e1 and 113e2. For example, the extension patterns 113e1 and 113e2 may be amplification patterns or internal contact patterns, but embodiments of the present disclosure are not limited thereto. For example, the portion of the first sub-electrodes 113b1 of the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 from the first to fifth electrode layers 113-1 to 113-5 that further protrudes (or extends) and is located at the connection region CR may be a first extension pattern 113e1. The portion of the second sub-electrodes 113b2 of the electrode layers 113-2 and 113-4 included in the second group 113G2 from the first to fifth electrode layers 113-1 to 113-5 that further protrudes (or extends) and is located at the connection region CR may be a second extension pattern 113e2.

[0140] The vibration generating portion 110 or the electrode portion 113 may include a patterned region 113p provided at the periphery of each of the main electrode 113a and the sub-electrodes 113b of each of the first to fifth electrode layers 113-1 to 113-5. For example, each of the first to fifth electrode layers 113-1 to 113-5 may include a patterned region 113p corresponding to a portion between the plurality of sub-electrodes 113b and a corner of each of the vibration layers 111-1 to 111-4.

[0141] The patterned region 113p of each of the first to fifth electrode layers 113-1 to 113-5 may be a non-disposed region of each of the electrode layers 113-1 to 113-5 on each of the first surface 111s1 and second surface 111s2 of each of the corresponding vibration layers 111-1 to 111-4. For example, the patterned region 113p may be an exposed region of the vibration layer, a patterned region of the electrode, an electrode-removed region, or an effective vibration region, but embodiments of the present disclosure are not limited thereto. For example, the patterned region 113p may be disposed (or formed) in a region corresponding to an effective vibration region based on the frequency-based vibration characteristics (or vibration mode shape) of the vibration device 100 or the vibration generating unit 110. In a plan view, the total size of the patterned region 113p on each of the first surface 111s1 and second surface 111s2 of the first to fourth vibration layers 111-1 to 111-4 may be 10% to 60% of the size of each of the corresponding vibration layers 111-1 to 111-4. Therefore, the capacitance of the vibration device 100 or the vibration generating part 110 may be reduced based on the total size of the patterned region 113 p .

[0142] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, the patterned region 113p between the plurality of sub-electrodes 113b may be a recessed region, a recessed pattern region, or a recessed portion, but embodiments of the present disclosure are not limited thereto. For example, the plurality of sub-electrodes 113b or the first to fourth sub-electrodes 113b1, 113b2, 113b3, and 113b4 may be arranged (or configured) in parallel with the patterned region 113p therebetween. For example, the patterned region 113p in the region between the first sub-electrode 113b1 and the second sub-electrode 113b2 and in the region between the third sub-electrode 113b3 and the fourth sub-electrode 113b4 may be a recessed region, a recessed pattern region, or a recessed portion, but embodiments of the present disclosure are not limited thereto.

[0143] According to an embodiment of the present disclosure, the total size of the main electrode 113a can be two-dimensionally (or in a plan view) larger than the total size of the plurality of sub-electrodes 113b1, 113b2, 113b3, and 113b4. The total size of the main electrode 113a can be two-dimensionally (or in a plan view) larger than the total size of the first to fourth sub-electrodes 113b1, 113b2, 113b3, and 113b4. For example, the ratio of the total size of the main electrode 113a to the total size of the first to fourth sub-electrodes 113b1, 113b2, 113b3, and 113b4 can be two-dimensionally (or in a plan view) from 10:8 to 10:2. Therefore, in each of the first to fourth vibration layers 111-1 to 111-4, the displacement (or bending force, or amplitude) of the vibration of the middle region MR, referred to as the primary vibration region, can be maximized, and the capacitance of the vibration device 100 or the vibration generating portion 110 can be reduced compared to the vibration generating portion according to the aforementioned experimental example.

[0144] According to an embodiment of the present disclosure, each of the first to fifth electrode layers 113-1 to 113-5 may overlap or be superimposed on each other along the third direction Z or thickness direction of the vibration generating portion 110. Two electrodes vertically adjacent to each other among the first to fifth electrode layers 113-1 to 113-5 may overlap or be superimposed on each other vertically with one vibration layer 111-1 to 111-4 therebetween. Each of the first to fourth vibration layers 111-1 to 111-4 may be arranged or interposed between two electrodes vertically adjacent to each other among the first to fifth electrode layers 113-1 to 113-5 that are vertically overlapped or superimposed on each other.

[0145] According to an embodiment of the present disclosure, the main electrode 113 a and the sub-electrode 113 b of each of the first to fifth electrode layers 113 - 1 to 113 - 5 may vertically overlap or superpose each other.

[0146] The main electrode 113 a and the sub-electrode 113 b of the first electrode layer 113 - 1 may be directly formed or disposed on the first surface 111 s 1 of the first vibration layer 111 - 1 .

[0147] The main electrode 113a and the sub-electrode 113b of the second electrode layer 113-2 may be directly formed or arranged on the first surface 111s1 of the second vibration layer 111-2, and may be electrically directly connected (or bonded) to the second surface 111s2 of the first vibration layer 111-1, but embodiments of the present disclosure are not limited thereto. For example, the main electrode 113a and the sub-electrode 113b of the second electrode layer 113-2 may be directly formed or arranged on the second surface 111s2 of the first vibration layer 111-1, and may be electrically directly connected (or bonded) to the first surface 111s1 of the second vibration layer 111-2, but embodiments of the present disclosure are not limited thereto.

[0148] The main electrode 113a and the sub-electrode 113b of the third electrode layer 113-3 may be directly formed or arranged on the first surface 111s1 of the third vibration layer 111-3 and may be electrically directly connected to (or bonded to) the second surface 111s2 of the second vibration layer 111-2, but embodiments of the present disclosure are not limited thereto. For example, the main electrode 113a and the sub-electrode 113b of the third electrode layer 113-3 may be directly formed or arranged on the second surface 111s2 of the second vibration layer 111-2 and may be electrically directly connected to (or bonded to) the first surface 111s1 of the third vibration layer 111-3, but embodiments of the present disclosure are not limited thereto.

[0149] The main electrode 113a and the sub-electrode 113b of the fourth electrode layer 113-4 may be electrically directly connected to (or bonded to) the first surface 111s1 of the fourth vibration layer 111-4 and may be electrically directly connected to (or bonded to) the second surface 111s2 of the third vibration layer 111-3, but embodiments of the present disclosure are not limited thereto. For example, the main electrode 113a and the sub-electrode 113b of the fourth electrode layer 113-4 may be directly formed or arranged on the second surface 111s2 of the third vibration layer 111-3 and may be electrically directly connected to (or bonded to) the first surface 111s1 of the fourth vibration layer 111-4, but embodiments of the present disclosure are not limited thereto.

[0150] The main electrode 113 a and the sub-electrode 113 b of the fifth electrode layer 113 - 5 may be directly formed or disposed on the second surface 111 s 2 of the fourth vibration layer 111 - 4 .

[0151] The electrode region ER of each of the first to fourth vibration layers 111 - 1 to 111 - 4 according to another embodiment of the present disclosure may include first to third regions, but embodiments of the present disclosure are not limited thereto.

[0152] Each of the first to third regions may be parallel to the first direction X. Each of the first to third regions may be a horizontal region, a divided region, or a horizontally divided region, but embodiments of the present disclosure are not limited thereto. The second region may be located (or configured) between the first and third regions. For example, the first to third regions may have the same size (or area) within the electrode region ER. For example, the first to third regions may have the same size (or area) within the same plane within the electrode region ER. The main electrode 113a of each of the first to fourth vibration layers 111-1 to 111-4 may be located (or configured) in the second region (or middle region) of the electrode region ER. The sub-electrodes 113b of each of the first to fourth vibration layers 111-1 to 111-4 may be located (or configured) in each of the first and third regions of the electrode region ER, respectively. For example, the first sub-electrode 113b1 and the second sub-electrode 113b2 of each of the first to fourth vibration layers 111-1 to 111-4 may be located (or configured) in the third region of the electrode region ER. The third sub-electrode 113 b 3 and the fourth sub-electrode 113 b 4 of each of the first to fourth vibration layers 111 - 1 to 111 - 4 may be disposed (or arranged) at the first region of the electrode region ER.

[0153] According to one or more of the first electrode layer 113-1 to the fifth electrode layer 113-5 according to an embodiment of the present disclosure, a transparent conductive material, a semi-transparent conductive material or an opaque conductive material may be formed. For example, the transparent conductive material or the semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the embodiments of the present 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) containing glass frit, etc., or may be formed from an alloy thereof, but the embodiments of the present disclosure are not limited thereto. For example, carbon may be carbon black, Ketjen black, carbon nanotubes, and a carbon material including graphite, but the embodiments of the present disclosure are not limited thereto.

[0154] According to an embodiment of the present disclosure, in order to enhance the electrical and / or vibration characteristics of the vibration layer 111, each of the first to fifth electrode layers 113-1 to 113-5 may include silver (Ag) having low resistivity. In each of the first to fifth electrode layers 113-1 to 113-5 including silver (Ag) containing glass frit, the content of the glass frit may be 1 wt% to 12 wt%, but the embodiments of the present disclosure are not limited thereto. The glass frit may include a PbO or Bi2O3-based material, but the embodiments of the present disclosure are not limited thereto.

[0155] Reference Figures 2 to 4The first connection member 118A may be configured to electrically connect to the electrode layers 113-1, 113-3, and 113-5 in the first group 113G1 of the first electrode layer 113-1 to the fifth electrode layer 113-5. The first connection member 118A may be formed (or disposed) on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113, and may electrically connect (or bond or contact) the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 of the first electrode layer 113-1 to the fifth electrode layer 113-5. For example, the first connection member 118A may electrically connect (or bond or contact) the first sub-electrode 113b1 (or first extension pattern 113e1) of each of the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 of the first electrode layer 113-1 to the fifth electrode layer 113-5. For example, the first connection member 118A may be a first connection line, a first connection line, a first common line, a first external connection line, a first lateral line, a first lateral connection line, a first lateral common line, a first edge contact member, or a first edge contact line, but embodiments of the present disclosure are not limited thereto.

[0156] The first connection member 118A may electrically (or commonly) connect (or bond or contact) the odd-numbered electrode layers 113-1, 113-3, and 113-5 or the first electrode layer 113-1 to the fifth electrode layer 113-5. Therefore, the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 may be connected (or bond or contact) to the first connection member 118A.

[0157] The first connection member 118A can electrically (or commonly) connect (or bond or contact) the first sub-electrode 113b1 (or the first extension pattern 113e1) of each of the odd-numbered electrode layers 113-1, 113-3, and 113-5, or the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 among the first electrode layers 113-1 to the fifth electrode layer 113-5. Therefore, each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 can be electrically (or commonly) connected (or bond or contact) to the first connection member 118A through the first sub-electrode 113b1 (or the first extension pattern 113e1).

[0158] Each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 connected to the first connection member 118A can function as a first electrode for each of the first to fourth vibration layers 111-1, 111-4. For example, the first electrode layer 113-1 can function as the first electrode (or upper electrode) of the first vibration layer 111-1. The third electrode layer 113-3 can function as the first electrode (or lower electrode) of the second vibration layer 111-2 and simultaneously function as the first electrode (or upper electrode) of the third vibration layer 111-3. The second vibration layer 111-2 and the third vibration layer 111-3 can share the third electrode layer 113-3. The fifth electrode layer 113-5 can function as the first electrode (or lower electrode) of the fourth vibration layer 111-4.

[0159] Reference Figure 2 、 Figure 3 and Figure 5 The second connection member 118B may be configured to electrically connect to the electrode layers 113-2 and 113-4 in the second group 113G2 of the first electrode layer 113-1 to the fifth electrode layer 113-5. The second connection member 118B may be formed (or disposed) on one surface (or one short side) of the vibration generating portion 110 or the electrode portion 113 so as to be electrically disconnected (or insulated) from the first connection member 118A, and may electrically connect (or bond or contact) the electrode layers 113-1, 113-3, and 113-5 included in the second group 113G2 of the first electrode layer 113-1 to the fifth electrode layer 113-5. For example, the second connection member 118B may electrically connect (or bond or contact) the second sub-electrode 113b2 (or second extension pattern 113e2) of each of the electrode layers 113-2 and 113-4 included in the second group 113G2 of the first electrode layer 113-1 to the fifth electrode layer 113-5. For example, the second connection member 118B may be a second connection line, a second connection line, a second common line, a second external connection line, a second lateral line, a second lateral connection line, a second lateral common line, a second edge contact member, or a second edge contact line, but embodiments of the present disclosure are not limited thereto.

[0160] The second connection member 118B may electrically (or commonly) connect (or bond or contact) the even-numbered electrode layers 113-2 and 113-4 or the second electrode layer 113-2 and the fourth electrode layer 113-4 among the first electrode layer 113-1 to the fifth electrode layer 113-5. Therefore, the second electrode layer 113-2 and the fourth electrode layer 113-4 may be commonly connected (or bonded or contact) to the second connection member 118B.

[0161] The second connection member 118B can be electrically (or commonly) connected to (or coupled to, or in contact with) the second sub-electrode 113b2 (or second extension pattern 113e2) of each of the even-numbered electrode layers 113-2 and 113-4, or the second electrode layer 113-2 and the fourth electrode layer 113-4 among the first electrode layer 113-1 to the fifth electrode layer 113-5. Therefore, each of the second electrode layer 113-3 and the fourth electrode layer 113-4 can be electrically (or commonly) connected to (or coupled to, or in contact with) the second connection member 118B via the second sub-electrode 113b2 (or second extension pattern 113e2).

[0162] Each of the second electrode layer 113-2 and the fourth electrode layer 113-4 connected to the second connection member 118B can function as the second electrode for each of the first to fourth vibration layers 111-1, 111-4. For example, the second electrode layer 113-2 can function as the second electrode (or lower electrode) of the first vibration layer 111-1 and simultaneously function as the first electrode (or upper electrode) of the second vibration layer 111-2. The first vibration layer 111-1 and the second vibration layer 111-2 can share the second electrode layer 113-2. For example, the fourth electrode layer 113-4 can function as the second electrode (or lower electrode) of the third vibration layer 111-3 and simultaneously function as the first electrode (or upper electrode) of the fourth vibration layer 111-4. The third vibration layer 111-3 and the fourth vibration layer 111-4 can share the fourth electrode layer 113-4.

[0163] Each of the first connecting member 118A and the second connecting member 118B according to an embodiment of the present disclosure may be configured as a conductive material or a conductive adhesive. For example, the conductive material of each of the first connecting member 118A and the second connecting member 118B may include a thermally cured electrode material, a light-cured (or ultraviolet (UV) cured) electrode material, or a solution-type electrode material, but the embodiments of the present disclosure are not limited thereto. For example, the electrode material of each of the first connecting member 118A and the second connecting member 118B may include silver (Ag), nickel (Ni), an Ag alloy, or a Ni alloy, but the embodiments of the present disclosure are not limited thereto. For example, each of the first connecting member 118A and the second connecting member 118B may be composed of silver (Ag) paste. For example, the conductive adhesive of each of the first connecting member 118A and the second connecting member 118B may include a conductive epoxy resin, a conductive acrylic resin, a conductive silicone resin, or a conductive polyurethane resin, but the embodiments of the present disclosure are not limited thereto.

[0164] Reference Figures 1 to 3 as well as Figure 5 , the vibration device 100 or the vibration generating portion 110 according to an embodiment of the present disclosure may further include a connection pattern (or a first connection pattern) 112 a.

[0165] The connection pattern 112a may be configured to transmit a driving signal applied from the outside to the second connection member 118B. The connection pattern 112a may be configured at the first surface 110a of the vibration generating portion 110. The connection pattern 112a may be configured at the first surface 110a of the vibration generating portion 110 to be electrically connected to the second connection member 118B.

[0166] The connection pattern 112a may be in the first electrode layer (or topmost electrode layer) 113-1 of the vibration generating portion 110 and may be configured to be electrically disconnected from the first electrode layer 113-1. The connection pattern 112a may be provided (or configured) on the first surface 111s1 of the first vibration layer 111-1, corresponding to the area between the second connection member 118B and the first electrode layer 113-1. For example, the connection pattern 112a may be provided (or configured) in an island shape in the connection region CR of the vibration generating portion 110 or the first vibration layer 111-1, so as to be electrically disconnected from the first electrode layer 113-1. The connection pattern 112a may be provided in the connection region CR of the first vibration layer 111-1, adjacent to the second sub-electrode 113b2 of the first electrode layer 113-1. For example, the connection pattern 112a may be provided in the connection region CR of the first vibration layer 111-1, so as to be electrically connected to the second connection member 118B and electrically disconnected from (or insulated from) the second sub-electrode 113b2 of the first electrode layer 113-1.

[0167] The connection pattern 112a may be arranged in the same plane as the first electrode layer 113-1. For example, the connection pattern 112a may be formed (or configured) as an electrode material layer of the first electrode layer 113-1 that is completely retained and not patterned or removed by the patterning process of the first electrode layer 113-1. For example, the second sub-electrode 113b2 of the first electrode layer 113-1 and the connection pattern 112a may be arranged parallel to each other in the same plane in the connection region CR. For example, the connection pattern 112a may be arranged parallel to the first extension pattern 113e1 of the first electrode layer 113-1. For example, the connection pattern 112a and the first extension pattern 113e1 of the first electrode layer 113-1 may be arranged parallel to each other in the same plane in the connection region CR.

[0168] The connection pattern 112a can increase (or expand) the size of the second connection member 118B provided on the first surface 110a of the vibration generating unit 110, thereby increasing the connection (or bonding or contact) area between the driving circuit and the second connection member 118B. Furthermore, the connection pattern 112a can increase the bonding force between the vibration generating unit 110 and the second connection member 118B. Therefore, the second connection member 118B can be additionally connected (or bonded) to the connection pattern 112a, thereby preventing the second connection member 118B connected (or bonded) to the vibration generating unit 110 from peeling off.

[0169] Reference Figures 2 to 5 , the vibration device 100 or the vibration generating part 110 according to an embodiment of the present disclosure may further include a plurality of second connection patterns 112 b and a plurality of third connection patterns 112 c.

[0170] The plurality of second connection patterns 112b may be configured to be electrically disconnected from each of the second electrode layer 113-2 and the fourth electrode layer 113-4. The plurality of second connection patterns 112b may be disposed (or configured) on the first surface 111s1 of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, corresponding to the region between the first connection member 118A and each of the second electrode layer 113-2 and the fourth electrode layer 113-4. The plurality of second connection patterns 112b may be disposed (or configured) in an island shape at the connection region CR of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, so as to be electrically disconnected from each of the second electrode layer 113-2 and the fourth electrode layer 113-4. The plurality of second connection patterns 112b may be disposed at the connection region CR of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, so as to be adjacent to the first sub-electrode 113b1 of each of the second electrode layer 113-2 and the fourth electrode layer 113-4. For example, a plurality of second connection patterns 112b may be provided at the connection region CR of each of the second vibration layer 111-2 and the fourth vibration layer 111-4 so as to be electrically connected to the first connection member 118A and electrically disconnected (or insulated) from the first sub-electrode 113b1 of each of the second electrode layer 113-2 and the fourth electrode layer 113-4.

[0171] The plurality of second connection patterns 112b may be formed (or configured) as an electrode material layer of each of the second electrode layer 113-2 and the fourth electrode layer 113-4 that is completely retained without being patterned or removed by the patterning process of each of the second electrode layer 113-2 and the fourth electrode layer 113-4.

[0172] The plurality of second connection patterns 112b can increase the coupling force between the vibration generating portion 110 and the first connection member 118A. Therefore, the first connection member 118A can be additionally connected (or coupled) to the plurality of second connection patterns 112b, thereby preventing the first connection member 118A connected (or coupled) to the vibration generating portion 110 from being peeled off.

[0173] The plurality of third connection patterns 112c may be configured to be electrically disconnected from each of the third electrode layer 113-3 and the fifth electrode layer 113-5. The plurality of third connection patterns 112c may be provided (or configured) in each of the third vibration layer 111-3 and the fourth vibration layer 111-4, corresponding to the region between the second connection member 118B and each of the third electrode layer 113-3 and the fifth electrode layer 113-5. The plurality of third connection patterns 112c may be provided (or configured) in an island shape at the connection region CR of each of the third vibration layer 111-3 and the fourth vibration layer 111-4, so as to be electrically disconnected from each of the third electrode layer 113-3 and the fifth electrode layer 113-5. The plurality of third connection patterns 112c may be provided in the connection region CR of each of the third vibration layer 111-3 and the fourth vibration layer 111-4, so as to be adjacent to the second sub-electrode 113b2 of each of the third electrode layer 113-3 and the fifth electrode layer 113-5. For example, a plurality of third connection patterns 112c may be provided at the connection region CR of each of the third vibration layer 111-3 and the fourth vibration layer 111-4 so as to be electrically connected to the second connection member 118B and electrically disconnected (or insulated) from the second sub-electrode 113b2 of each of the third electrode layer 113-3 and the fifth electrode layer 113-5.

[0174] The plurality of third connection patterns 112c may be formed (or configured) as an electrode material layer of each of the third electrode layer 113-3 and the fifth electrode layer 113-5 that is completely retained without being patterned or removed by the patterning process of each of the third electrode layer 113-3 and the fifth electrode layer 113-5.

[0175] The plurality of third connection patterns 112c can further increase the coupling force between the vibration generating portion 110 and the second connection member 118B. Therefore, the second connection member 118B can be additionally connected (or coupled) to the plurality of third connection patterns 112c, thereby further preventing the second connection member 118B connected (or coupled) to the vibration generating portion 110 from being peeled off.

[0176] Each of the first to fourth vibration layers 111-1 to 111-4, or the vibration portion 111, according to an embodiment of the present disclosure can be polarized by a specific voltage externally applied to the first and second electrodes in a constant temperature atmosphere or an atmosphere where the temperature changes from high temperature to room temperature, but the embodiments of the present disclosure are not limited thereto. For example, in a constant temperature atmosphere or an atmosphere where the temperature changes from high temperature to room temperature, a first polarization voltage can be commonly applied to the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 via the first connection member 118A, and a second polarization voltage can be commonly applied to the second electrode layer 113-2 and the fourth electrode layer 113-4 via the connection pattern 112a and the second connection member 118B. Thus, the first to fourth vibration layers 111-1 to 111-4 can be polarized simultaneously by the first polarization voltage and the second polarization voltage, but the embodiments of the present disclosure are not limited thereto. Each of the first to fifth electrode layers 113-1 to 113-5 may be separated from a surface (or outer side wall) of each of the corresponding vibration layers 111-1 to 111-4 by a predetermined distance (or interval), thereby preventing electrical short circuits between the first to fifth electrode layers 113-1 to 113-5 during the polarization process.

[0177] According to an embodiment of the present disclosure, the plurality of first to fourth vibration layers 111 - 1 to 111 - 4 may be classified or grouped into a first group and a second group.

[0178] The vibration layers 111-1 and 111-3 included in the first group may have the same polarization direction. The vibration layers 111-2 and 111-4 included in the second group may have the same polarization direction. The vibration layers 111-1 and 111-3 included in the first group and the vibration layers 111-2 and 111-4 included in the second group may have different polarization directions. For example, the vibration layers 111-1 and 111-3 included in the first group and the vibration layers 111-2 and 111-4 included in the second group may have opposite polarization directions.

[0179] According to an embodiment of the present disclosure, among the plurality of vibration layers or the first to fourth vibration layers 111-1 to 111-4, the vibration layers 111-1 and 111-3 included in the first group may have the same polarization direction, and the vibration layers 111-2 and 111-4 included in the second group may have the same polarization direction. The vibration layers 111-1 and 111-3 and the vibration layers 111-2 and 111-4 may have polarization directions opposite to each other. For example, each of the vibration layers 111-1 and 111-3 may have a polarization direction from the first surface 111a1 toward the second surface 111a2, and each of the vibration layers 111-2 and 111-4 may have a polarization direction from the second surface 111a2 toward the first surface 111a1, but the embodiments of the present disclosure are not limited thereto.

[0180] According to an embodiment of the present disclosure, multiple vibration layers or the first vibration layer 111-1 to the fourth vibration layer 111-4 that are vertically overlapped or superimposed on each other can be displaced (or vibrated or driven) in the same direction, so the vibration device 100 or the vibration generating part 110 can have a strong driving force or a large displacement force.

[0181] Figure 6 According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line CC' shown in FIG. Figure 7 According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line DD' shown in FIG.

[0182] Reference Figure 1 、 Figure 6 and Figure 7 , the vibration device 100 according to an embodiment of the present disclosure may further include a cover member 130 .

[0183] The cover member 130 may be configured to cover at least one or more of the first surface 110a and the second surface 110b of the vibration generating part 110. The cover member 130 may be configured to protect at least one or more of the first surface 110a and the second surface 110b of the vibration generating part 110.

[0184] The cover member 130 according to an embodiment of the present disclosure may include a first cover member 131 .

[0185] The first covering member 131 may be disposed on the first surface 110a of the vibration generating portion 110. The first covering member 131 may be configured to cover the uppermost electrode layer of the vibration generating portion 110. For example, the first covering member 131 may be configured to cover the first electrode layer 113-1 of the vibration generating portion 110. For example, the first covering member 131 may be configured to have a larger size than the vibration generating portion 110. The first covering member 131 may be configured to protect the first surface 110a and the first electrode layer 113-1 of the vibration generating portion 110.

[0186] The first cover member 131 according to an embodiment of the present disclosure may include an adhesive layer. For example, the first cover member 131 may include a base film and an adhesive layer disposed on the base film and connected or bonded to the first surface 110a of the vibration generating portion 110. For example, the adhesive layer may include an electrically insulating material having adhesive properties and capable of compression and decompression.

[0187] The first covering member 131 according to another embodiment of the present disclosure may be connected or bonded to the first surface 110a of the vibration generating portion 110 via a first adhesive layer 133. For example, the first covering member 131 may be connected or bonded to the first surface 110a of the vibration generating portion 110 or the first electrode layer 113-1 via the first adhesive layer 133. For example, the first covering member 131 may be connected or bonded to the first surface 110a of the vibration generating portion 110 or the first electrode layer 113-1 via a film lamination process using the first adhesive layer 133. The first adhesive layer 133 may be configured to surround the entire first surface 110a of the vibration generating portion 110 and a portion of a side surface of the vibration generating portion 110.

[0188] The cover member 130 according to an embodiment of the present disclosure may further include a second adhesive layer 135 .

[0189] The second adhesive layer 135 may be provided on the second surface 110b of the vibration generating portion 110. The second adhesive layer 135 may be configured to cover the lowermost electrode layer of the vibration generating portion 110. For example, the second adhesive layer 135 may be configured to cover the vibration generating portion 110. The second adhesive layer 135 may be configured to protect the second surface 110b and the fifth electrode layer 113-5 of the vibration generating portion 110. The second adhesive layer 135 may be configured to surround the entire second surface 110b of the vibration generating portion 110 and a portion of the side surface of the vibration generating portion 110. For example, the second adhesive layer 135 may be a protective layer or a protective member, but embodiments of the present disclosure are not limited thereto.

[0190] The second adhesive layer 135 may be connected or bonded to the first adhesive layer 133 at the side surface of the vibration generating part 110 or the outer portion of the first cover member 131. Therefore, the first adhesive layer 133 and the second adhesive layer 135 may be configured to surround or completely surround the vibration generating part 110. The first adhesive layer 133 and the second adhesive layer 135 may be configured to cover or surround all surfaces of the vibration generating part 110. For example, the vibration generating part 110 may be inserted (or accommodated) or embedded (or built-in) inside the adhesive layer including the first adhesive layer 133 and the second adhesive layer 135.

[0191] The cover member 130 according to an embodiment of the present disclosure may further include a second cover member 137 , but the embodiment of the present disclosure is not limited thereto.

[0192] The second cover member 137 may be disposed on the second surface 110b of the vibration generating portion 110. The second cover member 137 may be configured to cover the lowermost electrode layer of the vibration generating portion 110. For example, the second cover member 137 may be configured to cover the fifth electrode layer 113-5 of the vibration generating portion 110. For example, the second cover member 137 may be configured to have a larger size than the vibration generating portion 110, or may be configured to have the same size as the first cover member 131. The second cover member 137 may be configured to protect the second surface 110b of the vibration generating portion 110 and the fifth electrode layer 113-5.

[0193] The first cover member 131 and the second cover member 137 according to an embodiment of the present disclosure may include the same material or different materials. For example, each of the first cover member 131 and the second cover member 137 may be a polyimide film, a polyethylene naphthalate film, or a polyethylene terephthalate film, but the embodiments of the present disclosure are not limited thereto.

[0194] The second cover member 137 may be connected or bonded to the second surface 110 b of the vibration generating portion 110 or the fifth electrode layer 113-5 through the second adhesive layer 135. For example, the second cover member 137 may be connected or bonded to the second surface 110 b of the vibration generating portion 110 or the fifth electrode layer 113-5 through a film lamination process using the second adhesive layer 135.

[0195] The vibration generating part 110 may be disposed or inserted (or accommodated) between the first cover member 131 and the second cover member 137. For example, the vibration generating part 110 may be inserted (or accommodated) or embedded (or built-in) inside the adhesive layer including the first adhesive layer 133 and the second adhesive layer 135.

[0196] Each of the first adhesive layer 133 and the second adhesive layer 135 according to another embodiment of the present disclosure may include an electrically insulating material having adhesiveness and capable of compression and decompression. For example, each of the first adhesive layer 133 and the second adhesive layer 135 may include epoxy resin, acrylic resin, silicone resin, polyurethane resin, pressure sensitive adhesive (PSA), optically clear adhesive (OCA), or optically clear resin (OCR), but embodiments of the present disclosure are not limited thereto.

[0197] Each of the first adhesive layer 133 and the second adhesive layer 135 according to another embodiment of the present disclosure may include an insulating adhesive material. For example, each of the first adhesive layer 133 and the second adhesive layer 135 may include one or more of a heat-curing adhesive, a light-curing adhesive, and a thermosetting adhesive (or a hot-bonding adhesive). For example, each of the first adhesive layer 133 and the second adhesive layer 135 may include a heat-curing adhesive or a thermosetting adhesive. The thermosetting adhesive may be a heat-activated type or a heat-curing type, but embodiments of the present disclosure are not limited thereto.

[0198] The first and second adhesive layers 133 and 135 may be disposed between the first and second cover members 131 and 137 to surround the vibration generating part 110. For example, one or more of the first and second adhesive layers 133 and 135 may be disposed to surround the vibration generating part 110.

[0199] The vibration device 100 according to an embodiment of the present disclosure may further include a signal providing member 190 .

[0200] The signal providing member 190 may be configured to be electrically connected to the vibration generating portion 110 on one side of the vibration generating portion 110. The signal providing member 190 may be configured to be electrically connected to the first connecting member 118A and the second connecting member 118B on one side of the vibration generating portion 110, respectively. For example, the signal providing member 190 may be configured to be electrically connected to each of the first electrode layer 113-1 and the connecting pattern 112a of the vibration generating portion 110 on one side of the vibration generating portion 110. The signal providing member 190 may be configured to be electrically connected to each of the first electrode layer 113-1 and the connecting pattern 112a of the vibration generating portion 110 on one side of the vibration generating portion 110 and on the first surface 110a of the vibration generating portion 110.

[0201] The signal providing member 190 may be configured to be electrically connected to the first surface 110a of the vibration generating portion 110 between the vibration generating portion 110 and the cover member 130. The signal providing member 190 may be configured to be electrically connected to each of the first electrode layer 113-1 and the connection pattern 112a in the first surface 110a of the vibration generating portion 110 in the region between the vibration generating portion 110 and the cover member 130. The signal providing member 190 may be disposed (or configured) between the vibration generating portion 110 and the cover member 130, thereby being electrically connected to each of the first connection member 118A and the second connection member 118B.

[0202] A portion of the signal providing member 190 may be accommodated (or inserted) between the vibration generating portion 110 and the cover member 130. For example, a portion of the signal providing member 190 may be accommodated (or inserted) between the first surface 110a of the vibration generating portion 110 and the first cover member 131. For example, a portion of the signal providing member 190 may be accommodated (or inserted) between the first cover member 131 and the second cover member 137.

[0203] According to an embodiment of the present disclosure, an end portion (or a terminal portion or a side) of the signal providing member 190 may be disposed or inserted (or accommodated) between one peripheral portion of the vibration generating portion 110 and one peripheral portion of the covering member 130. For example, an end portion (or a terminal portion or a side) of the signal providing member 190 may be disposed or inserted (or accommodated) between one peripheral portion of the first covering member 131 and the first surface 110a of the vibration generating portion 110.

[0204] According to an embodiment of the present disclosure, a portion of the signal providing member 190 may be disposed or inserted into (or accommodated in) a portion between one peripheral portion of the first cover member 131 and one peripheral portion of the second cover member 137. One peripheral portion of the first cover member 131 and one peripheral portion of the second cover member 137 may accommodate or vertically cover the portion of the signal providing member 190. Therefore, the signal providing member 190 may be integrated into the vibration generating portion 110 (or configured as one body with the vibration generating portion 110) via the first cover member 131 and the second cover member 137. For example, the vibration device 100 according to an embodiment of the present disclosure may be a vibration device in which the signal providing member 190 is integrated. A portion of the signal providing member 190 may be inserted (or accommodated) and fixed between the covering member 130 and the vibration generating portion 110, or may be inserted (or accommodated) and fixed between the first covering member 131 and the second covering member 137, thereby preventing contact defects between the vibration generating portion 110 and the signal providing member 190 caused by movement or bending of the signal providing member 190 during the manufacturing process of attaching the signal providing member 190 to the vibration generating portion 110.

[0205] According to an embodiment of the present disclosure, the signal providing member 190 can be configured as a signal cable, a cable member, a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, but the embodiments of the present disclosure are not limited thereto.

[0206] The signal providing member 190 according to an embodiment of the present disclosure may include a base film 191 and a plurality of signal lines 193 and 195. For example, the signal providing member 190 may include a base film 191, a first signal line 193, a second signal line 195, and an insulating film 197.

[0207] The base film 191 may include a transparent or opaque plastic material. The base film 191 may be a flexible film, a base insulating film, or a base member, but the embodiments of the present disclosure are not limited thereto. The base film 191 may have a certain width along the first direction X and may extend elongated along the second direction Y.

[0208] Each of the first and second signal lines (or signal lines) 193 and 195 may be provided at the first surface of the base film 191 so as to be parallel to the second direction Y, and may be spaced apart from or separated from each other along the first direction X. Each of the first and second signal lines 193 and 195 may be provided at the first surface of the base film 191 so as to be parallel to each other. For example, each of the first and second signal lines 193 and 195 may be implemented in a line shape by patterning a metal layer (or conductive layer) formed or deposited on the first surface of the base film 191. For example, the first surface of the base film 191 may be the rear surface of the base film 191, but embodiments of the present disclosure are not limited thereto.

[0209] An insulating film 197 may be provided at the first surface of the base film 191 to cover each of the first signal line 193 and the second signal line 195. The first and second signal lines (or the plurality of signal lines) 193 and 195 may be provided between the base film 191 and the insulating film 197. The insulating film 197 may be a protective film, a cover film, a cap film, or a cover insulating film, but embodiments of the present disclosure are not limited thereto.

[0210] The first signal line 193 may be configured to be electrically connected to the first connection member 118A. The first signal line 193 may be disposed between the cover member 130 and the vibration generating portion 110 and may be electrically connected to the first electrode layer 113-1 of the vibration generating portion 110. The first signal line 193 may be electrically connected to the first extension pattern 113e1 of the first electrode layer 113-1 or the extension portion of the first sub-electrode 113b1 in the vibration generating portion 110 between the cover member 130 and the first surface 110a of the vibration generating portion 110.

[0211] Reference Figure 1 and Figure 6The end (or one side) 193a of the first signal line 193 can be electrically connected to the first electrode layer 113-1 of the vibration generating unit 110 between the first surface 110a of the vibration generating unit 110 and the first cover member 131. The end 193a of the first signal line 193 can be electrically connected to the first extension pattern 113e1 of the first electrode layer 113-1 or the extension portion of the first sub-electrode 113b1. The end (or one side) 193a of the first signal line 193 can be electrically connected to (or bonded to or in contact with) each of the first extension pattern 113e1 of the first electrode layer 113-1 and the upper surface of the first connecting member 118A. Therefore, the drive signal (or first drive signal) provided by the external vibration drive circuit can be provided to the first electrode layer 113-1 of the vibration generating unit 110 via the first signal line 193, and can be provided to the third electrode layer 113-3 and the fifth electrode layer 113-5 of the vibration generating unit 110 via the first connecting member 118A. For example, the end portion (or one side) 193 a of the first signal line 193 may be a first electrode connection portion or a first electrode contact portion, but embodiments of the present disclosure are not limited thereto.

[0212] The second signal line 195 may be configured to be electrically connected to the second connection member 118B. The second signal line 195 may be disposed between the cover member 130 and the vibration generating portion 110 and may be electrically connected to the second connection member 118B. The second signal line 195 may be disposed between the cover member 130 and the vibration generating portion 110 and may be electrically connected to each of the connection pattern 112a of the vibration generating portion 110 and the second connection member 118B. The second signal line 195 may be electrically connected to each of the connection pattern 112a of the vibration generating portion 110 and the second connection member 118B between the cover member 130 and the first surface 110a of the vibration generating portion 110.

[0213] Reference Figure 1 and Figure 7 , the end (or one side) 195a of the second signal line 195 can be electrically connected (or coupled to or in contact with) each of the connection patterns 112a of the vibration generating unit 110 and the second connection member 118B between the first surface 110a of the vibration generating unit 110 and the first cover member 131. Therefore, the drive signal (or second drive signal) provided by the external vibration drive circuit can be provided to the connection pattern 112a of the vibration generating unit 110 through the second signal line 195, and can be provided to the second electrode layer 113-2 and the fourth electrode layer 113-4 of the vibration generating unit 110 through the connection pattern 112a. For example, the end (or one side) 193a of the second signal line 195 can be a second electrode connecting portion or a second electrode contact portion, but embodiments of the present disclosure are not limited thereto.

[0214] According to another embodiment of the present disclosure, each of the end portion (or side) 193a of the first signal line 193 and the end portion (or side) 195a of the second signal line 195 may not be covered by the insulating film 197 and may be supported by the extension portion 191a of the base film 191, but the embodiments of the present disclosure are not limited thereto. For example, the extension portion 191a of the base film 191 may be removed. For example, each of the end portion (or side) 193a of the first signal line 193 and the end portion (or side) 195a of the second signal line 195 may protrude (or extend) from the end portion of the base film 191 to a predetermined length without being supported or covered by the base film 191 and the insulating film 197. Therefore, each of the end portion (or side) 193a of the first signal line 193 and the end portion (or side) 195a of the second signal line 195 may bend or bend. For example, the end (or one side) 193a of the first signal line 193 and the end (or one side) 195a of the second signal line 195 that are not supported by the base film 191 and the insulating film 197 can be a first protruding line, a first protruding electrode, a first conductive protruding line, a first flexible protruding line or a first flexible protruding electrode, but the embodiments of the present disclosure are not limited to this.

[0215] The vibration device 100 according to an embodiment of the present disclosure may include a plurality of vibration layers 111-1 to 111-4 stacked vertically and displaced (or vibrated or driven) in the same direction, thereby having a strong driving force or a large displacement force, thereby enhancing sound pressure level characteristics and / or sound characteristics. For example, the sound pressure level characteristics of sound and the sound characteristics of mid- and low-pitched vocal cords may be enhanced.

[0216] In the vibration device 100 according to the embodiment of the present disclosure, compared with a structure in which the electrode layer and the vibration layer have the same size and shape, the electrode layers 113-1 to 113-5 can be configured to have a shape different from that of each of the vibration layers 111-1 to 111-4 and a size smaller than that of each of the vibration layers 111-1 to 111-4. Therefore, the vibration device 100 according to the embodiment of the present disclosure can have a relatively low capacitance and can reduce the thickness of each of the vibration layers 111-1 to 111-4. The vibration device 100 according to the embodiment of the present disclosure can generate less heat and can be driven by a low-cost driving circuit.

[0217] According to the vibration device 300 of the embodiment of the present disclosure, a welding process for electrically connecting the vibration generating unit 110 and the signal providing member 190 may not be required, thereby simplifying the manufacturing process and structure of the vibration device 100. The vibration device 100 may be provided with the signal providing member 190 integrated therein, and thus, the signal providing member 190 and the vibration generating unit 110 may be configured as a single component, thereby achieving an integrated effect.

[0218] Figure 8 A vibration device according to another embodiment (or second embodiment) of the present disclosure is illustrated. Figure 9 Illustrated according to an embodiment of the present disclosure Figure 8 The vibration generating section shown in . Figure 8 and Figure 9 Illustrated in which the above reference Figures 1 to 7 Hereinafter, when describing the vibration device according to the second embodiment of the present disclosure, the elements different from the elements of the vibration device 100 according to the first embodiment of the present disclosure will be mainly described. Figures 1 to 7 The description of the vibration device 100 may be included in Figure 8 and Figure 9 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements, and a repeated description may be omitted or will be briefly given below.

[0219] Reference Figure 8 and Figure 9 In the vibration device 100 according to the second embodiment of the present disclosure, the vibration generating part 110 or the electrode part 113 may further include a dummy pattern part 113 d.

[0220] The dummy pattern portion 113d may be provided (or configured) at the periphery of each of the first to fifth electrode layers 113-1 to 113-5 to be electrically disconnected (or insulated) from each of the first to fifth electrode layers 113-1 to 113-5. The dummy pattern portion 113d may be provided (or configured) to be separated from or electrically disconnected (or insulated) from the main electrode 113a and the sub-electrode 113b.

[0221] The dummy pattern portion 113d can be provided (or configured) to be separated from or electrically disconnected (or insulated) from the main electrode 113a and the sub-electrode 113b. The dummy pattern portion 113d can be provided (or configured) in the patterned region 113p of the electrode portion 113. For example, the dummy pattern portion 113d can be provided (or configured) in the patterned region 113p of the electrode portion 113 corresponding to the corners of each of the first to fourth vibration layers 111-1, 111-4. The dummy pattern portion 113d can be provided (or configured) in the patterned region 113p of each of the first to fifth electrode layers 113-1, 113-5. For example, the dummy pattern portion 113d can be provided (or configured) in the patterned region 113p of each of the first to fifth electrode layers 113-1, 113-5 overlapping the corners of each of the first to fourth vibration layers 111-1, 111-4.

[0222] The dummy pattern portion 113d may be formed on the corresponding vibration layers 111-1 to 111-4 along with each of the first to fifth electrode layers 113-1 to 113-5. For example, the dummy pattern portion 113d may be an electrode layer of each of the electrode layers 113-1 to 113-5 that remains intact and is not patterned or removed by the patterning process. For example, each of the first to fifth electrode layers 113-1 to 113-5 may further include a dummy pattern portion 113d disposed around the periphery of each of the main electrode 113a and the sub-electrode 113b. For example, each of the first to fifth electrode layers 113-1 to 113-5 may further include a dummy pattern portion 113d disposed at the patterned region 113p of each of the main electrode 113a and the sub-electrode 113b.

[0223] The dummy pattern portion 113d according to an embodiment of the present disclosure may include first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4. For example, each of the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 may be an island pattern, a non-driving electrode, or a non-driving main electrode, but the embodiment of the present disclosure is not limited thereto.

[0224] The first dummy pattern 113d1 may be provided in a patterned region (or first patterned region) 113p of each of the first to fifth electrode layers 113-1 to 113-5 that overlaps with a first corner of each of the first to fourth vibration layers 111-1 to 111-4. For example, the first dummy pattern 113d1 may be provided in a patterned region (or first patterned region) 113p that overlaps with a first corner of each of the first to fourth vibration layers 111-1 to 111-4 and is adjacent to the first sub-electrode 113b1 of each of the first to fifth electrode layers 113-1 to 113-5.

[0225] The second dummy pattern 113d2 may be provided in a patterned region (or second patterned region) 113p of each of the first to fifth electrode layers 113-1 to 113-5 that overlaps with the second corner of each of the first to fourth vibration layers 111-1 to 111-4. For example, the second dummy pattern 113d2 may be provided in a patterned region (or second patterned region) 113p that overlaps with the second corner of each of the first to fourth vibration layers 111-1 to 111-4 and is adjacent to the second sub-electrode 113b2 of each of the first to fifth electrode layers 113-1 to 113-5.

[0226] The third dummy pattern 113d3 may be provided in a patterned region (or third patterned region) 113p of each of the first to fifth electrode layers 113-1 to 113-5 that overlaps with the third corner of each of the first to fourth vibration layers 111-1 to 111-4. For example, the third dummy pattern 113d3 may be provided in a patterned region (or third patterned region) 113p that overlaps with the third corner of each of the first to fourth vibration layers 111-1 to 111-4 and is adjacent to the third sub-electrode 113b3 of each of the first to fifth electrode layers 113-1 to 113-5.

[0227] The fourth dummy pattern 113d4 may be provided in a patterned region (or fourth patterned region) 113p of each of the first to fifth electrode layers 113-1 to 113-5 that overlaps with the fourth corner of each of the first to fourth vibration layers 111-1 to 111-4. For example, the fourth dummy pattern 113d4 may be provided in a patterned region (or fourth patterned region) 113p that overlaps with the fourth corner of each of the first to fourth vibration layers 111-1 to 111-4 and is adjacent to the fourth sub-electrode 113b4 of each of the first to fifth electrode layers 113-1 to 113-5.

[0228] The dummy pattern portion 113d can minimize the space (or gap space) between the vertically stacked first to fourth vibration layers 111-1, 111-4, thereby minimizing or preventing damage to the vibration layers in the space between the first to fourth vibration layers 111-1, 111-4 or in the periphery of the spacer due to pressure from the vibration generating portion 110. Furthermore, the dummy pattern portion 113d can increase the mass of each of the corresponding vibration layers 111-1 to 111-4. Therefore, the natural frequency of each of the first to fourth vibration layers 111-1, 111-4 can be increased due to the increase in mass caused by the dummy pattern portion 113d.

[0229] Figure 10 A vibration device according to another embodiment (or third embodiment) of the present disclosure is illustrated. Figure 11 Illustrated according to an embodiment of the present disclosure Figure 10 The vibration generating section shown in . Figure 12 Illustrated according to an embodiment of the present disclosure Figure 10 and Figure 11 The electrode portion shown in . Figures 10 to 12 Illustrated in the above reference Figures 1 to 9Hereinafter, when describing the vibration device 100 according to the third embodiment of the present disclosure, the elements different from the elements of the vibration device 100 according to the first and second embodiments of the present disclosure will be mainly described. Figures 1 to 9 The description of the vibration device 100 may be included in Figures 10 to 12 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements, and repeated descriptions may be omitted or will be briefly given below.

[0230] Reference Figures 10 to 12 In the vibration generating portion 110 of the vibration device 100 according to the third embodiment of the present disclosure, the electrode portion 113 or the dummy pattern portion 113d may further include an electrode connecting line 113L configured to electrically connect the first to fourth dummy patterns 113d1, 113d2, 113d3 and 113d4 to each other.

[0231] The electrode connection line 113L may be configured to electrically connect between the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4. The electrode connection line 113L may be provided at an edge portion (or peripheral portion) of each of the first to fourth vibration layers 111-1 to 111-4, and may be configured to electrically connect between the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4.

[0232] The electrode connection line 113L according to an embodiment of the present disclosure may include first to third electrode connection lines 113L1, 113L2, and 113L3. The first to third electrode connection lines 113L1, 113L2, and 113L3 may be used for electrical connection between the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4, and thus may include a line shape having a relatively thin width.

[0233] The first electrode connection line 113L1 can be configured to electrically connect the first dummy pattern 113d1 and the second dummy pattern 113d3. The first electrode connection line 113L1 can be provided between the first dummy pattern 113d1 and the second dummy pattern 113d3 at an edge portion (or peripheral portion) adjacent to one long side (or first long side) of each of the first to fourth vibration layers 111-1 to 111-4. Therefore, the first dummy pattern 113d1 and the third dummy pattern 113d3 can be electrically connected to each other via the first electrode connection line 113L1.

[0234] The second electrode connection line 113L2 can be configured to electrically connect the second dummy pattern 113d2 and the fourth dummy pattern 113d4. The second electrode connection line 113L2 can be provided between the second dummy pattern 113d2 and the fourth dummy pattern 113d4 at an edge portion (or peripheral portion) adjacent to the other long side (or second long side) of each of the first to fourth vibration layers 111-1 to 111-4. Therefore, the second dummy pattern 113d2 and the fourth dummy pattern 113d4 can be electrically connected to each other via the second electrode connection line 113L2.

[0235] The third electrode connection line 113L3 can be configured to electrically connect the third dummy pattern 113d3 and the fourth dummy pattern 113d4. The third electrode connection line 113L3 can be provided between the third dummy pattern 113d3 and the fourth dummy pattern 113d4 at an edge portion (or peripheral portion) adjacent to the other short side (or second short side) of each of the first to fourth vibration layers 111-1 to 111-4. Therefore, the third dummy pattern 113d3 and the fourth dummy pattern 113d4 can be electrically connected to each other via the third electrode connection line 113L3.

[0236] The first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 and the first to third electrode connection lines 113L1, 113L2, and 113L3 may be provided (or configured) at edge portions other than one edge portion adjacent to one short side (or the first short side) of each of the first to fourth vibration layers 111-1 to 111-4.

[0237] A first dummy pattern 113d1 adjacent to the first sub-electrode 113b1 in the electrode layers 113-1, 113-3, and 113-5 in the first group 113G1 among the first to fifth electrode layers 113-1 to 113-5 may extend to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4. For example, a first dummy pattern 113d1 adjacent to the first sub-electrode 113b1 in the first, third, and fifth electrode layers 113-1 to 113-5 in the first group 113G1 among the first to fifth electrode layers 113-1 to 113-5 may extend to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4. For example, the portion of the first dummy pattern 113d1 extending to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4 may be a first dummy extension pattern (or third extension pattern) 113de1.

[0238] The first dummy extension pattern 113de1 may be arranged parallel to the first extension pattern 113e1 of the first sub-electrode 113b1. An end (or end surface) of the first dummy extension pattern 113de1 may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, one side surface (or one sidewall) of the first dummy extension pattern 113de1 may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113.

[0239] The second dummy pattern 113d2, which is adjacent to the second sub-electrode 113b2 in the electrode layers 113-2 and 113-4 in the second group 113G2 among the first to fifth electrode layers 113-1 to 113-5, may extend to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4. For example, the second dummy pattern 113d2, which is adjacent to the second sub-electrode 113b2 in the second electrode layer 113-2 and the fourth electrode layer 113-4 in the second group 113G2 among the first to fifth electrode layers 113-1 to 113-5, may extend to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4. For example, the portion of the second dummy pattern 113d2 that extends to the connection region CR of each of the first to fourth vibration layers 111-1 to 111-4 may be a second dummy extension pattern (or fourth extension pattern) 113de2.

[0240] The second dummy extension pattern 113de2 may be arranged parallel to the second extension pattern 113e2 of the second sub-electrode 113b2. The end (or end surface) of the second dummy extension pattern 113de2 may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, one side surface (or one sidewall) of the second dummy extension pattern 113de2 may be exposed on one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113.

[0241] The vibration device 100 according to the third embodiment of the present disclosure may further include a third connection member 118C and a fourth connection member 118D.

[0242] The third connection member 118C may be configured to electrically connect to the first dummy extension pattern 113de1 provided on the electrode layers 113-1, 113-3, and 113-5 in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5. For example, the third connection member 118C may be formed (or provided) on one surface (or one short side) of the vibration generating portion 110 or the electrode portion 113 parallel to the first connection member 118A, and may be configured to electrically (or commonly) connect to the first dummy extension pattern 113de1 provided on each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5. Except for the fact that the third connection member 118C is commonly connected to the first dummy extension pattern 113de1 provided on each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5, the third connection member 118C may be identical or substantially identical to the first connection member 118A, and thus its description will be omitted.

[0243] The fourth connection member 118D may be configured to electrically connect to the second dummy extension pattern 113de2 provided on the electrode layers 113-2 and 113-4 in the second group 113G2 of the first to fifth electrode layers 113-1 to 113-5. For example, the fourth connection member 118D may be formed (or provided) on a surface (or a short side) of the vibration generating portion 110 or the electrode portion 113 that is parallel to the second connection member 118B, and may be configured to electrically (or commonly) connect to the second dummy extension pattern 113de2 provided on each of the second electrode layer 113-2 and the fourth electrode layer 113-4. Except for the fact that the fourth connection member 118D is commonly connected to the second dummy extension pattern 113de2 provided on each of the second electrode layer 113-2 and the fourth electrode layer 113-4, the fourth connection member 118D may be identical or substantially identical to the second connection member 118B, and thus its description will be omitted.

[0244] Each of the third and fourth connection members 118C and 118D according to an embodiment of the present disclosure may include a conductive material or a conductive adhesive. For example, the third and fourth connection members 118C and 118D may be formed (or constituted) together with the first and second connection members 118A and 118B, and thus their description is omitted.

[0245] The vibration device 100 or the vibration generating portion 110 according to the third embodiment of the present disclosure may further include an auxiliary connection pattern 114a. For example, the auxiliary connection pattern 114a may be an additional connection pattern, a first additional connection pattern, a first auxiliary connection pattern, or a fourth connection pattern, but the embodiments of the present disclosure are not limited thereto.

[0246] The auxiliary connection pattern 114a can be configured to transmit an externally applied polarization voltage to the fourth connection member 118D. The auxiliary connection pattern 114a can be disposed on the first surface 110a of the vibration generating portion 110 to electrically connect to the fourth connection member 118D. For example, the auxiliary connection pattern 114a can be arranged (or configured) in an island shape in the connection region CR of the vibration generating portion 110 or the first vibration layer 111-1 to electrically disconnect from the first electrode layer 113-1. The auxiliary connection pattern 114a can be disposed in the connection region CR of the first vibration layer 111-1, adjacent to the second dummy pattern 113d2 disposed on the first electrode layer 113-1. The auxiliary connection pattern 114a can be disposed on the first surface 110a of the vibration generating portion 110 to electrically connect to the fourth connection member 118D and parallel to the connection pattern 112a. The auxiliary connection pattern 114a can be formed (or configured) together with the connection pattern 112a, and therefore its description is omitted.

[0247] The vibration device 100 or the vibration generating part 110 according to the third embodiment of the present disclosure may further include a plurality of second auxiliary connection patterns (or fifth connection patterns) 114 b and a plurality of third auxiliary connection patterns (or sixth connection patterns) 114 c.

[0248] A plurality of second auxiliary connection patterns 114b may be disposed (or configured) on the first surface 111s1 of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, corresponding to the region between each of the second electrode layer 113-2 and the fourth electrode layer 113-4 and the third connection member 118C. For example, the plurality of second auxiliary connection patterns 114b may be disposed (or configured) in an island shape at the connection region CR of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, so as to be electrically disconnected from (or insulated from) each of the second electrode layer 113-2 and the fourth electrode layer 113-4. The plurality of second auxiliary connection patterns 114b may be disposed (or configured) at the connection region CR of each of the second vibration layer 111-2 and the fourth vibration layer 111-4, so as to be adjacent to the first dummy pattern 113d1 disposed on each of the second electrode layer 113-2 and the fourth electrode layer 113-4. The plurality of second auxiliary connection patterns 114b may be disposed electrically connected to the third connection member 118C and parallel to each of the plurality of second connection patterns 112b. The plurality of second auxiliary connection patterns 114b may be formed (or configured) together with the plurality of second connection patterns 112b, and thus a description thereof is omitted.

[0249] The plurality of second auxiliary connection patterns 114b can increase the coupling force between the vibration generating part 110 and the third connection member 118C. Therefore, the third connection member 118C can be additionally connected (or coupled) to the plurality of second auxiliary connection patterns 114b, thereby preventing the third connection member 118C connected (or coupled) to the vibration generating part 110 from being peeled off.

[0250] A plurality of third auxiliary connection patterns 114c may be disposed (or configured) on each of the third vibration layer 111-3 and the fifth vibration layer 111-5, corresponding to the region between each of the third electrode layer 113-3 and the fifth electrode layer 113-5 and the fourth connection member 118D. For example, the plurality of third auxiliary connection patterns 114c may be disposed (or configured) in an island shape at the connection region CR of each of the third vibration layer 111-3 and the fourth vibration layer 111-4, so as to be electrically disconnected from (or insulated from) each of the third electrode layer 113-3 and the fifth electrode layer 113-5. The plurality of third auxiliary connection patterns 114c may be disposed (or configured) at the connection region CR of each of the third vibration layer 111-3 and the fifth vibration layer 111-5, so as to be adjacent to the second dummy pattern 113d2 disposed on each of the third electrode layer 113-3 and the fifth electrode layer 113-5. The plurality of third auxiliary connection patterns 114c may be disposed electrically connected to the fourth connection member 118D and parallel to each of the plurality of third connection patterns 112c. The plurality of third auxiliary connection patterns 114c may be formed (or configured) together with the plurality of third connection patterns 112c, and thus, description thereof is omitted.

[0251] The plurality of third auxiliary connection patterns 114c can increase the coupling force between the vibration generating part 110 and the fourth connection member 118D. Therefore, the fourth connection member 118D can be additionally connected (or coupled) to the plurality of third auxiliary connection patterns 114c, thereby preventing the fourth connection member 118D connected (or coupled) to the vibration generating part 110 from being peeled off.

[0252] The edge portion (or peripheral portion) of each of the first to fourth vibration layers 111-1 to 111-4 may be additionally polarized by a specific voltage applied from the outside to the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 and the first to third electrode connection lines 113L1, 113L2, and 113L3 through the third connection member 118C and the fourth connection member 118D in a constant temperature atmosphere or a temperature atmosphere changed from high temperature to room temperature, but the embodiments of the present disclosure are not limited thereto. The polarization process on the edge portion (or peripheral portion) of each of the first to fourth vibration layers 111-1 to 111-4 using the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 may be the same as the polarization process using the first to fifth electrode layers 113-1 to 113-5, and thus a description thereof will be omitted.

[0253] Based on the polarization of the vibration layers 111-1 to 111-4 using the first electrode layer 113-1 to the fifth electrode layer 113-5 and the first to fourth virtual patterns 113d1, 113d2, 113d3 and 113d4, the deviation in displacement characteristics (or vibration characteristics) between the regions of the vibration layers 111-1 to 111-4 corresponding to the first electrode layer 113-1 to the fifth electrode layer 113-5 and the regions corresponding to the first to fourth virtual patterns 113d1, 113d2, 113d3 and 113d4 can be minimized, and the deviation in voltage characteristics and / or resonance frequency required for displacement (or vibration) can be minimized.

[0254] According to an embodiment of the present disclosure, after the polarization process, each of the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 provided at each of the first to fifth electrode layers 113-1 to 113-5 may maintain a ground voltage or the same voltage to prevent charge from accumulating when the vibration generating portion 110 is displaced (or vibrated). For example, each of the third connection member 118C and the fourth connection member 118D may be electrically connected to a ground voltage, so that the first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 provided at each of the first to fifth electrode layers 113-1 to 113-5 may maintain a ground voltage.

[0255] Figure 13 A vibration device according to another embodiment (or fourth embodiment) of the present disclosure is illustrated. Figure 14 Illustrated according to an embodiment of the present disclosure Figure 13 The vibration generating section shown in . Figure 15 Illustrated according to an embodiment of the present disclosure Figure 13 and Figure 14 The electrode portion shown in . Figures 13 to 15Illustrated in the above reference Figures 1 to 7 Hereinafter, when describing the vibration device 100 according to the fourth embodiment of the present disclosure, the elements different from the elements of the vibration device 100 according to the first embodiment of the present disclosure will be mainly described. Figures 1 to 7 The description of the vibration device 100 may be included in Figures 13 to 15 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements, and repeated descriptions may be omitted or will be briefly given below.

[0256] Reference Figures 13 to 15 In the vibration generating portion 110 of the vibration device 100 according to the fourth embodiment of the present disclosure, the electrode portion 113 may further include a pattern electrode (or pattern line electrode) 113c. For example, each of the first electrode layer 113-1 to the fifth electrode layer 113-5 of the electrode portion 113 may further include a pattern electrode 113c.

[0257] In each of the first to fifth electrode layers 113 - 1 to 113 - 5 , the pattern electrode 113 c may further include a first pattern electrode 113 c 1 and a second pattern electrode 113 c 2 .

[0258] In each of the first to fifth electrode layers 113-1 to 113-5, a first pattern electrode (or first pattern line electrode) 113c1 may be provided (or configured) to be electrically connected to the first sub-electrode 113b1 and the second sub-electrode 113b2. The first pattern electrode 113c1 may be provided in the electrode region ER adjacent to the connection region CR of the vibration generating portion 110 or the vibration portion 111. For example, the first pattern electrode 113c1 may be provided (or configured) in the electrode region ER between the first sub-electrode 113b1, the second sub-electrode 113b2, and the connection region CR. For example, the first pattern electrode 113c1 may be provided (or configured) in parallel with the main electrode 113a, with the first sub-electrode 113b1 and the second sub-electrode 113b2 therebetween, in the first region R1 of the electrode region ER.

[0259] In each of the first to fifth electrode layers 113-1 to 113-5, the first pattern electrode 113c1 may be disposed (or configured) to be commonly connected to the ends of each of the first sub-electrode 113b1 and the second sub-electrode 113b2. For example, the first pattern electrode 113c1 may be disposed (or configured) to intersect (or cross) each of the first sub-electrode 113b1 and the second sub-electrode 113b2 and to be commonly connected to the ends of each of the first sub-electrode 113b1 and the second sub-electrode 113b2. Therefore, in each of the first to fifth electrode layers 113-1 to 113-5, the first sub-electrode 113b1 and the second sub-electrode 113b2 may be disposed (or configured) between the main electrode 113a and the first pattern electrode 113c1.

[0260] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from one side of the first pattern electrode 113c1 toward the connection region CR corresponding to the extension direction of the first sub-electrode 113b1, but the embodiments of the present disclosure are not limited thereto. In addition to extending from the first pattern electrode 113c1, the first extension pattern 113e1 may be the same as that described above with reference to FIG. Figures 1 to 7 The first extension patterns 113e1 described are the same or substantially the same, and thus description thereof is omitted.

[0261] In each of the first to fifth electrode layers 113-1 to 113-5, a second pattern electrode (or second pattern line electrode) 113c2 may be provided (or configured) to be electrically connected to the third sub-electrode 113b3 and the fourth sub-electrode 113b4. The second pattern electrode 113c2 may be provided in the electrode region ER adjacent to the third sub-electrode 113b3 and the fourth sub-electrode 113b4 within the electrode region ER of the vibration generating portion 110 or the vibration portion 111. For example, the second pattern electrode 113c2 may be provided (or configured) in parallel with the main electrode 113a with the third sub-electrode 113b3 and the fourth sub-electrode 113b4 therebetween in the fourth region R4 of the electrode region ER.

[0262] In each of the first to fifth electrode layers 113-1 to 113-5, the second pattern electrode 113c2 may be disposed (or configured) to be commonly connected to the ends of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4. For example, the second pattern electrode 113c2 may be disposed (or configured) to intersect with each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4 and to be commonly connected to the ends of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4. Therefore, in each of the first to fifth electrode layers 113-1 to 113-5, the third sub-electrode 113b3 and the fourth sub-electrode 113b4 may be disposed (or configured) between the main electrode 113a and the second pattern electrode 113c2.

[0263] The second extension pattern 113e2 provided (or configured) at the electrode layers 113-2 and 113-4 included in the second group 113G2 of the first electrode layer 113-1 to the fifth electrode layer 113-5 may extend from one side of the second pattern electrode 113c2 toward the connection region CR corresponding to the extension direction of the second sub-electrode 113b2, but the embodiments of the present disclosure are not limited thereto. In addition to extending from the second pattern electrode 113c2, the second extension pattern 113e2 may be the same as that described above with reference to FIG. Figures 1 to 7 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0264] The vibration generating portion 110 or the electrode portion 113 according to an embodiment of the present disclosure may include a patterned region 113p disposed (or configured) in the peripheral regions of each of the main electrode 113a and the sub-electrodes 113b of each of the first to fifth electrode layers 113-1 to 113-5. Each of the first to fifth electrode layers 113-1 to 113-5 may include a patterned region 113p disposed (or configured) in the peripheral regions of the sub-electrodes 113b. For example, the patterned region 113p may be disposed (or configured) in each of the outer regions of each of the first to fourth sub-electrodes 113b1, 113d2, 113d3, and 113b4, the region between the first sub-electrode 113b1 and the second sub-electrode 113b2, and the region between the third sub-electrode 113b3 and the fourth sub-electrodes 113d2, 113d3, and 113b4.

[0265] According to an embodiment of the present disclosure, the size of the main electrode 113a may be larger than the total size of the sub-electrode 113b and the pattern electrode 113c. For example, the ratio of the size of the main electrode 113a to the total size of the sub-electrode 113b and the pattern electrode 113c may be 10:8 to 10:2.

[0266] The vibration device 100 according to the fourth embodiment of the present disclosure may have the same Figures 1 to 7 The vibration device 100 described above has the same effect as that described above and may further include a first pattern electrode 113c1 and a second pattern electrode 113c2, so that the sound pressure level characteristics of the sound and / or the sound characteristics of the high-pitched vocal cords can be further enhanced due to the vibration of the edge portion (or peripheral portion) adjacent to the short side of the vibration layer.

[0267] Figure 16 A vibration device according to another embodiment (or fifth embodiment) of the present disclosure is illustrated. Figure 17 Illustrated according to an embodiment of the present disclosure Figure 16 The vibration generating section shown in . Figure 16 and Figure 17 By changing the above reference Figures 13 to 15 Hereinafter, when describing the vibration device 100 according to the fifth embodiment of the present disclosure, the elements different from those of the vibration device 100 according to the fourth embodiment of the present disclosure will be mainly described. Figures 1 to 7 and Figures 14 and 15 In the description of the vibration device 100 described above, other descriptions besides the description of the position of the pattern electrode may be included. Figure 16 and Figure 17 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements and repeated descriptions thereof are omitted.

[0268] Reference Figure 16 and Figure 17 In the vibration generating portion 110 of the vibration device 100 according to the fifth embodiment of the present disclosure, each of the first pattern electrode 113c1 and the second pattern electrode 113c2 may be provided (or configured) to be electrically connected to the sub-electrode 113b and to intersect with the sub-electrode 113b.

[0269] The first pattern electrode 113c1 can be arranged (or configured) to be electrically (commonly) connected to the first sub-electrode 113b1 and the second sub-electrode 113b2 and to intersect each of the first sub-electrode 113b1 and the second sub-electrode 113b2. For example, the first pattern electrode 113c1 can be arranged (or configured) to intersect the central portion of each of the first sub-electrode 113b1 and the second sub-electrode 113b2. For example, the first pattern electrode 113c1 can be arranged (or configured) between the end of each of the first sub-electrode 113b1 and the second sub-electrode 113b2 and the main electrode 113a. For example, the first pattern electrode 113c1 can be arranged (or configured) in the middle area between the end of each of the first sub-electrode 113b1 and the second sub-electrode 113b2 and the main electrode 113a.

[0270] The second pattern electrode 113c2 can be arranged (or configured) to be electrically (commonly) connected to the third sub-electrode 113b3 and the fourth sub-electrode 113b4 and to intersect each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4. For example, the second pattern electrode 113c2 can be arranged (or configured) to intersect the central portion of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4. For example, the second pattern electrode 113c2 can be arranged (or configured) between the end of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4 and the main electrode 113a. For example, the second pattern electrode 113c2 can be arranged (or configured) in the middle area between the end of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4 and the main electrode 113a.

[0271] According to an embodiment of the present disclosure, the size of the main electrode 113a may be larger than the total size of the sub-electrode 113b and the pattern electrode 113c. For example, the ratio of the size of the main electrode 113a to the total size of the sub-electrode 113b and the pattern electrode 113c may be 10:8 to 10:2.

[0272] Similar to the vibration device 100 according to the fourth embodiment of the present disclosure, the vibration device 100 according to the fifth embodiment of the present disclosure may further include a first pattern electrode 113c1 and a second pattern electrode 113c2, and thus, the sound pressure level characteristics of the sound and / or the sound characteristics of the high-pitched vocal cords can be further enhanced due to the vibration of the edge portion (or peripheral portion) adjacent to the short side of the vibration layer.

[0273] Figure 18 A vibration device according to another embodiment (or sixth embodiment) of the present disclosure is illustrated. Figure 19 Illustrated according to an embodiment of the present disclosure Figure 18 The vibration generating section shown in . Figures 18 to 19 Illustrated in the above reference Figures 13 to 15 Hereinafter, when describing the vibration device 100 according to the sixth embodiment of the present disclosure, the elements different from those of the vibration device 100 according to the fourth embodiment of the present disclosure will be mainly described. Figures 13 to 15 The description of the vibration device 100 may be included in Figure 18 and Figure 19 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements, and repeated descriptions may be omitted or will be briefly given below.

[0274] Reference Figure 18 and Figure 19 In the vibration generating portion 110 of the vibration device 100 according to the sixth embodiment of the present disclosure, the pattern electrode 113c of the electrode portion 113 may include a third pattern electrode 113c3 and a fourth pattern electrode 113c4. Each of the third pattern electrode 113c3 and the fourth pattern electrode 113c4 may be provided (or configured) to be electrically connected to the sub-electrode 113b and to intersect with the sub-electrode 113b.

[0275] The third pattern electrode 113c3 can be electrically (commonly) connected to the first sub-electrode 113b1 and the second sub-electrode 113b2. The third pattern electrode 113c3 can be arranged (or configured) to intersect each of the first sub-electrode 113b1 and the second sub-electrode 113b2 between the main electrode 113a and the first pattern electrode 113c1. For example, the third pattern electrode 113c3 can be arranged (or configured) in the middle region of each of the first sub-electrode 113b1 and the second sub-electrode 113b2. For example, the third pattern electrode 113c3 can be arranged (or configured) to intersect the central portion of each of the first sub-electrode 113b1 and the second sub-electrode 113b2.

[0276] The fourth pattern electrode 113c4 may be electrically (commonly) connected to the third sub-electrode 113b3 and the fourth sub-electrode 113b4. The fourth pattern electrode 113c4 may be disposed (or configured) to intersect each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4 between the main electrode 113a and the second pattern electrode 113c2. For example, the fourth pattern electrode 113c4 may be disposed (or configured) in a middle region between each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4. For example, the fourth pattern electrode 113c4 may be disposed (or configured) to intersect the central portion of each of the third sub-electrode 113b3 and the fourth sub-electrode 113b4.

[0277] According to an embodiment of the present disclosure, the size of the main electrode 113a may be larger than the total size of the sub-electrode 113b and the pattern electrode 113c. For example, the ratio of the size of the main electrode 113a to the total size of the sub-electrode 113b and the pattern electrode 113c may be 10:8 to 10:2.

[0278] Similar to the vibration device 100 according to the fourth embodiment of the present disclosure, the vibration device 100 according to the sixth embodiment of the present disclosure may further include a third pattern electrode 113c3 and a fourth pattern electrode 113c4, and thus, the sound pressure level characteristics of the sound and / or the sound characteristics of the high-pitched vocal cords can be further enhanced due to the vibration of the edge portion (or peripheral portion) adjacent to the short side of the vibration layer.

[0279] Figure 20A vibration device according to another embodiment (or seventh embodiment) of the present disclosure is illustrated. Figure 21 Illustrated according to an embodiment of the present disclosure Figure 20 The vibration generating section shown in . Figure 22 Illustrated according to an embodiment of the present disclosure Figure 20 and Figure 21 The electrode portion shown in . Figures 20 to 22 Illustrated by modifying the above reference Figures 1 to 7 Embodiments of Sub-Electrode Implementation at the Described Vibration Device Hereinafter, when describing the vibration device 100 according to the seventh embodiment of the present disclosure, elements different from those of the vibration device 100 according to the first embodiment of the present disclosure will be mainly described. Figures 1 to 7 The description of the vibration device 100 may be included in Figures 20 to 22 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements, and repeated descriptions may be omitted or will be briefly given below.

[0280] Reference Figures 20 to 22 In the vibration generating portion 110 of the vibration device 100 according to the seventh embodiment of the present disclosure, the sub-electrode 113b of the electrode portion 113 may include first to sixth sub-electrodes 113b1, 113b2, 113b3, 113b4, 113b5, and 113b6.

[0281] Except that the sub-electrode 113b of the electrode portion 113 includes the first to sixth sub-electrodes 113b1 to 113b6, other elements of the vibration device 100 according to the seventh embodiment of the present disclosure may be the same as those described above with reference to FIG. Figures 1 to 7 The vibration device 100 described is the same, so its description is omitted.

[0282] Each of the first to fifth electrode layers 113 - 1 to 113 - 5 or the sub-electrodes 113 b according to an embodiment of the present disclosure may include first to sixth sub-electrodes 113 b 1 , 113 b 2 , 113 b 3 , 113 b 4 , 113 b 5 , and 113 b 6 .

[0283] The first to third sub-electrodes 113b1, 113b2, and 113b3 may be arranged in parallel at the electrode region ER adjacent to the connection region CR of the vibration generating portion 110 or the vibration portion 111 in the corresponding vibration layers 111-1 to 111-4. The first to third sub-electrodes 113b1, 113b2, and 113b3 may be arranged in parallel at the first region R1 of the electrode region ER adjacent to the connection region CR in the corresponding vibration layers 111-1 to 111-4. Each of the first to third sub-electrodes 113b1, 113b2, and 113b3 may protrude (or extend) from the first side 113s1 of the main electrode 113a toward the first region R1. For example, the second sub-electrode 113b2 may be arranged (or configured) between the first sub-electrode 113b1 and the third sub-electrode 113b3.

[0284] The fourth to sixth sub-electrodes 113b4, 113b5, and 113b6 may protrude (or extend) in a direction opposite to the first to third sub-electrodes 113b1, 113b2, and 113b3 at the corresponding vibration layers 111-1 to 111-4. The fourth to sixth sub-electrodes 113b4, 113b5, and 113b6 may be arranged parallel to the fourth region R4 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. Each of the fourth to sixth sub-electrodes 113b4, 113b5, and 113b6 may protrude (or extend) from the second side 113s2 of the main electrode 113a toward the fourth region R4. For example, the fifth sub-electrode 113b5 may be arranged (or configured) between the fourth sub-electrode 113b4 and the sixth sub-electrode 113b6.

[0285] According to an embodiment of the present disclosure, in each of the first to fifth electrode layers 113-1 to 113-5, any one of the first to third sub-electrodes 113b1, 113b2, and 113b3 may extend (or protrude) to the connection region CR. Ends (or end surfaces) of the first to third sub-electrodes 113b1, 113b2, and 113b3 positioned at the connection region CR may be exposed at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113. For example, portions protruding (or extending) from any one of the first to third sub-electrodes 113b1, 113b2, and 113b3 positioned at the connection region CR and positioned at the connection region CR may be the extension patterns 113e1 and 113e2.

[0286] According to an embodiment of the present disclosure, the size of the main electrode 113a may be larger than the total size of the sub-electrodes 113b. For example, the ratio of the size of the main electrode 113a to the total size of the sub-electrodes 113b may be 10:8 to 10:2.

[0287] The vibration device 100 according to the seventh embodiment of the present invention may have the same effects as the vibration device 100 according to the first embodiment of the present invention.

[0288] Figure 23 A vibration device according to another embodiment (or eighth embodiment) of the present disclosure is illustrated. Figure 24 Illustrated according to an embodiment of the present disclosure Figure 23 The vibration generating section shown in . Figure 25 Illustrated in accordance with an embodiment of the present disclosure Figure 23 and Figure 24 The electrode portion shown in . Figures 23 to 25 Illustrated by modifying the above reference Figures 1 to 7 The embodiment of the invention is realized by the electrode portion of the vibration device described above. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 23 to 25 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements and repeated descriptions thereof are omitted.

[0289] Reference Figures 23 to 25 In the vibration generating part 110 of the vibration device 100 according to the eighth embodiment of the present disclosure, the electrode part 113 or each of the first to fifth electrode layers 113 - 1 to 113 - 5 may include a main electrode 113 f and a sub-electrode 113 g .

[0290] In each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113f may include a plurality of main electrodes 113f1 and 113f2. For example, the main electrode 113f may include a first main electrode 113f1 and a second main electrode 113f2. For example, each of the first main electrode 113f1 and the second main electrode 113f2 may be a main line pattern or a main pattern line, but embodiments of the present disclosure are not limited thereto.

[0291] In each of the first to fifth electrode layers 113-1 to 113-5, the first main electrode 113f1 and the second main electrode 113f2 may be provided (or arranged) in parallel in the second and third regions R2 and R3 of the electrode region ER. The first main electrode 113f1 and the second main electrode 113f2 may be provided (or arranged) in the second and third regions R2 and R3 of the electrode region ER to have a linear shape extending in the length direction of the long side of the vibrating portion 111. For example, one side of each of the first and second main electrodes 113f1 and 113f2 may extend to a portion of the first region R1 of the electrode region ER, and one side of each of the first and second main electrodes 113f1 and 113f2 may extend to a portion of the fourth region R4 of the electrode region ER.

[0292] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, the first main electrode 113f1 can be set (or configured) to be adjacent to one long side (or the first long side) of the vibration part 111, and the second main electrode 113f2 can be set (or configured) to be adjacent to the other long side (or the second long side) of the vibration part 111.

[0293] In each of the first to fifth electrode layers 113 - 1 to 113 - 5 , the sub-electrode 113 g may include a first sub-electrode 113 g 1 and a second sub-electrode 113 g 2 .

[0294] In each of the first to fifth electrode layers 113-1 to 113-5, a first sub-electrode 113g1 may be provided (or configured) in the electrode region ER adjacent to the connection region CR of the vibration generating portion 110 or the vibration portion 111. The first sub-electrode 113g1 may be provided (or configured) at the first region R1 of the electrode region ER and may be electrically (or commonly) connected to one side of each of the first main electrode 113f1 and the second main electrode 113f2. For example, the first sub-electrode 113g1 may have a smaller size (or area) than the first region R1 of the electrode region ER, but embodiments of the present disclosure are not limited thereto.

[0295] In each of the first to fifth electrode layers 113-1 to 113-5, the second sub-electrode 113g2 may be disposed (or arranged) in parallel with the first sub-electrode 113g1 with the main electrode 113f therebetween in the fourth region R4 of the electrode region ER. The second sub-electrode 113g2 may be disposed (or arranged) in the fourth region R4 of the electrode region ER and may be electrically (or commonly) connected to the other side of each of the first and second main electrodes 113f1 and 113f2. For example, the second sub-electrode 113g2 may have a smaller size (or area) than the fourth region R4 of the electrode region ER, but embodiments of the present disclosure are not limited thereto.

[0296] In each of the first to fifth electrode layers 113-1 to 113-5, the first main electrode 113f1 and the second main electrode 113f2 may be arranged (or configured) in parallel between the first sub-electrode 113g1 and the second sub-electrode 113g2. Therefore, in each of the first to fifth electrode layers 113-1 to 113-5, the first main electrode 113f1 and the second main electrode 113f2 may be electrically connected to the first sub-electrode 113g1 and the second sub-electrode 113g2 in the same plane. For example, based on the first main electrode 113f1 and the second main electrode 113f2 and the first sub-electrode 113g1 and the second sub-electrode 113g2, each of the first to fifth electrode layers 113-1 to 113-5 may have a two-dimensional "II" shape. For example, the main electrodes and the sub-electrodes may have a "II" shape in a plan view.

[0297] According to an embodiment of the present invention, the size of the main electrode 113f may be larger than the total size of the sub-electrode 113g. For example, the ratio of the size of the main electrode 113f to the total size of the sub-electrode 113g may be 10:8 to 10:2.

[0298] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 of the first electrode layer 113-1 to the fifth electrode layer 113-5 may extend from one side of the first sub-electrode 113g1 toward the connection region CR corresponding to the extension direction of the first main electrode 113f1, but the embodiments of the present disclosure are not limited thereto. In addition to extending from the first sub-electrode 113g1, the first extension pattern 113e1 may be the same as that described above with reference to FIG. Figures 1 to 7 The first extension pattern 113e1 described is the same or substantially the same, and thus description thereof is omitted.

[0299] The second extension pattern 113e2 provided (or configured) at the electrode layers 113-2 and 113-4 included in the second group 113G2 of the first electrode layer 113-1 to the fifth electrode layer 113-5 may extend from the other side of the first sub-electrode 113g1 toward the connection region CR corresponding to the extension direction of the second main electrode 113f2, but the embodiments of the present disclosure are not limited thereto. In addition to the second extension pattern 113e2 extending from the first sub-electrode 113g1, the second extension pattern 113e2 may be the same as that described above with reference to Figures 1 to 7 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0300] The vibration generating portion 110 or the electrode portion 113 according to an embodiment of the present disclosure may include a patterned region 113p, which is disposed (or configured) in the peripheral regions of the first main electrode 113f1 and the second main electrode 113f2, and the first sub-electrode 113f1 and the second sub-electrode 113g2, of each of the first electrode layer 113-1 to the fifth electrode layer 113-5. Each of the first electrode layer 113-1 to the fifth electrode layer 113-5 may include a patterned region 113p disposed (or configured) in the peripheral regions of the plurality of main electrodes 113f1 and 113f2. For example, the patterned region 113p may be disposed (or configured) in each of the outer regions of each of the plurality of main electrodes 113f1 and 113f2 and the regions between the plurality of main electrodes 113f1 and 113f2.

[0301] The vibration device 100 according to the eighth embodiment of the present invention may have the same Figures 1 to 7 The same effect as described in the vibration device 100 is achieved, and the vibration force (or displacement width or drive width) of the edge portion (or peripheral portion) adjacent to the short side of the vibration layer can be increased by the first sub-electrode 113g1 and the second sub-electrode 113g2, so that the sound pressure level characteristics of the sound and / or the sound characteristics of the high-pitched vocal cords can be further enhanced.

[0302] Figure 26 A vibration device according to another embodiment (or a ninth embodiment) of the present disclosure is illustrated. Figure 27 Illustrated according to an embodiment of the present disclosure Figure 26 The vibration generating section shown in . Figure 28 Illustrated according to an embodiment of the present disclosure Figure 26 and Figure 27 The electrode portion shown in . Figures 26 to 28 By changing the above reference Figures 1 to 7 The embodiment of the invention is realized by the electrode portion of the vibration device described above. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 26 to 28 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements and repeated descriptions thereof are omitted.

[0303] Reference Figures 26 to 28 In the vibration generating portion 110 of the vibration device according to the ninth embodiment of the present disclosure, the electrode portion 113 or each of the first electrode layer 113-1 to the fifth electrode layer 113-5 may include a main electrode 113a, a sub-electrode 113h separated from the main electrode 113a, and one or more electrode connecting lines 113j1 and 113j2 electrically connecting the main electrode 113a to the sub-electrode 113h.

[0304] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, the main electrode 113a may be provided in the middle region MR among the electrode regions ER of the corresponding vibration layers 111-1 to 111-4. For example, the main electrode 113a may be provided in the second region R2 and the third region R3 of the electrode region ER. For example, the main electrode 113a may have a size corresponding to the second region R2 and the third region R3 of the electrode region ER. The main electrode 113a of each of the first electrode layer 113-1 to the fifth electrode layer 113-5 may be provided in the same manner as described above with reference to Figure 1 The main electrode 113a described in FIG. 7 is the same or substantially the same as that described in FIG. 7 , and thus repeated description thereof is omitted.

[0305] In each of the first to fifth electrode layers 113 - 1 to 113 - 5 , the sub-electrode 113 h may include a first sub-electrode 113 h 1 and a second sub-electrode 113 h 2 .

[0306] In each of the first to fifth electrode layers 113-1 to 113-5, a first sub-electrode 113h1 may be disposed (or configured) spaced apart from one side of the main electrode 113a. The first sub-electrode 113h1 may be spaced apart from and parallel to one side of the main electrode 113a and may be disposed (or configured) in the electrode region ER adjacent to the connection region CR of the vibration generating portion 110 or the vibration portion 111. For example, the first sub-electrode 113h1 may be disposed (or configured) in the first region R1 of the electrode region ER adjacent to the connection region CR. The first sub-electrode 113h1 may be disposed (or configured) in parallel with the main electrode 113a in the first region R1 of the electrode region ER. For example, the first sub-electrode 113h1 may have a smaller size (or area) than the first region R1 of the electrode region ER, but embodiments of the present disclosure are not limited thereto.

[0307] In each of the first to fifth electrode layers 113-1 to 113-5, the second sub-electrode 113h2 may be disposed (or configured) to be spaced apart from the other side of the main electrode 113a. The second sub-electrode 113h2 may be disposed (or configured) in the electrode region ER to be spaced apart from and parallel to the other side of the main electrode 113a. For example, the second sub-electrode 113h2 may be disposed (or configured) in the fourth region R4 of the electrode region ER, adjacent to the other short side of the vibrating portion 111. For example, the second sub-electrode 113h2 may have a smaller size (or area) than the fourth region R4 of the electrode region ER, but embodiments of the present disclosure are not limited thereto.

[0308] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, one or more first electrode connection lines 113j1 may be provided (or configured) to electrically connect the main electrode 113a to the first sub-electrode 113h1. The one or more first electrode connection lines 113j1 may be provided (or configured) in a portion between the main electrode 113a and the first sub-electrode 113h1. For example, the one or more first electrode connection lines 113j1 may be provided (or configured) in a portion between the main electrode 113a and the first sub-electrode 113h1 within the first region R1 of the electrode region ER. For example, the one or more first electrode connection lines 113j1 may be used to electrically connect the main electrode 113a and the first sub-electrode 113h1 and may therefore include a line shape having a relatively thin width. Therefore, the main electrode 113a may be electrically connected to the first sub-electrode 113h1 via the one or more first electrode connection lines 113j1.

[0309] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, one or more second electrode connection lines 113j2 may be provided (or configured) to electrically connect the main electrode 113a to the second sub-electrode 113h2. The one or more second electrode connection lines 113j2 may be provided (or configured) between the main electrode 113a and the second sub-electrode 113h2. For example, the one or more second electrode connection lines 113j2 may be provided (or configured) in a portion between the main electrode 113a and the second sub-electrode 113h2 within the fourth region R4 of the electrode region ER. For example, the one or more second electrode connection lines 113j2 may be used to electrically connect the main electrode 113a and the second sub-electrode 113h2 and, therefore, may include a line shape having a relatively thin width. Thus, the main electrode 113a may be electrically connected to the second sub-electrode 113h2 via the one or more second electrode connection lines 113j2.

[0310] In each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113a may be electrically connected to the first sub-electrode 113h1 through one or more first electrode connection lines 113j1 and may be electrically connected to the second sub-electrode 113h2 through one or more second electrode connection lines 113j2.

[0311] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from one side surface (or one short side) of the first sub-electrode 113h1 toward the connection region CR, but the embodiments of the present disclosure are not limited thereto. In addition to extending from the first sub-electrode 113h1, the first extension pattern 113e1 may be the same as that described above with reference to Figures 1 to 7The first extension patterns 113e1 described are the same or substantially the same, and thus description thereof is omitted.

[0312] The second extension pattern 113e2 provided (or configured) at the electrode layers 113-2 and 113-4 included in the second group 113G2 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from the other side (or one short side) of one side surface of the first sub-electrode 113h1 toward the connection region CR, but the embodiments of the present disclosure are not limited thereto. In addition to the second extension pattern 113e2 extending from the first sub-electrode 113h1, the second extension pattern 113e2 may be the same as that described above with reference to FIG. Figures 1 to 7 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0313] The vibration generating portion 110 or the electrode portion 113 according to an embodiment of the present disclosure may include a patterned region 113p, which is provided (or configured) in the peripheral region of each of the main electrode 113a, the first sub-electrode 113h1, and the second sub-electrode 113h2 of each of the first electrode layer 113-1 to the fifth electrode layer 113-5. For example, each of the first electrode layer 113-1 to the fifth electrode layer 113-5 may include a patterned region 113p provided in each of the first region R1 and the fourth region R4 of the electrode region ER.

[0314] The patterned region 113p may include one or more first patterned regions 113p1, one or more second patterned regions 113p2, one or more third patterned regions 113p3, and one or more fourth patterned regions 113p4.

[0315] One or more first patterned regions 113p1 may be disposed (or configured) between the main electrode 113a and the first sub-electrode 113h1. For example, in the first region R1 of the electrode region ER, one or more first patterned regions 113p1 may be disposed (or configured) between the main electrode 113a and the first sub-electrode 113h1. For example, between the main electrode 113a and the first sub-electrode 113h1, the one or more first patterned regions 113p1 may be divided into multiple regions by one or more first electrode connection lines 113j1.

[0316] One or more second patterned regions 113p2 may be disposed (or configured) between the main electrode 113a and the second sub-electrode 113h2. For example, in the fourth region R4 of the electrode region ER, one or more second patterned regions 113p2 may be disposed (or configured) between the main electrode 113a and the second sub-electrode 113h2. For example, between the main electrode 113a and the second sub-electrode 113h2, the one or more second patterned regions 113p2 may be divided into multiple regions by one or more second electrode connection lines 113j2.

[0317] One or more third patterned regions 113p3 may be disposed (or configured) between the first sub-electrode 113h1 and the connection region CR. For example, in the first region R1 of the electrode region ER, one or more third patterned regions 113p3 may be disposed (or configured) between the first sub-electrode 113h1 and the connection region CR. For example, between the first sub-electrode 113h1 and the connection region CR, one or more third patterned regions 113p1 may be divided into multiple regions by one of the first extension pattern 113e1 and the second extension pattern 113e2.

[0318] One or more fourth patterned regions 113p4 may be disposed (or arranged) between the second sub-electrode 113h2 and the other short side of the vibration part 110. For example, in the fourth region R4 of the electrode region ER, one or more fourth patterned regions 113p4 may be disposed (or arranged) between the second sub-electrode 113h2 and the other short side of the vibration part 110.

[0319] The vibration device 100 according to the ninth embodiment of the present disclosure may have the same Figures 1 to 7 The same effect as described above is achieved by the vibration device 100, and the vibration force (or displacement width or drive width) of the edge portion (or peripheral portion) adjacent to the short side of the vibration layer can be increased by the first sub-electrode 113h1 and the second sub-electrode 113h2, so that the sound pressure level characteristics of the sound and / or the sound characteristics of the high-pitched vocal cords can be further enhanced.

[0320] Figure 29 A vibration device according to another embodiment (or a tenth embodiment) of the present disclosure is illustrated. Figure 30 Illustrated according to an embodiment of the present disclosure Figure 29 The vibration generating section shown in . Figure 31 Illustrated according to an embodiment of the present disclosure Figure 29 and Figure 30 The electrode portion shown in . Figures 29 to 31 By changing the above reference Figures 1 to 7 The embodiment of the invention is realized by the electrode portion of the vibration device described above. Figures 1 to 7In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 29 to 31 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements and their repeated descriptions are omitted.

[0321] Reference Figures 29 to 31 In the vibration generating portion 110 of the vibration device according to the ninth embodiment of the present disclosure, the electrode portion 113 or each of the first to fifth electrode layers 113-1 to 113-5 may include a main electrode 113k, a sub-electrode 113m separated from the main electrode 113k, and one or more electrode connecting lines 113n1 and 113n2 electrically connecting the main electrode 113k to the sub-electrode 113m.

[0322] In each of the first to fifth electrode layers 113 - 1 to 113 - 5 , the main electrode 113 k may include a first main electrode 113 k 1 and a second main electrode 113 k 2 that are disposed (or configured) to be spaced apart from and parallel to each other.

[0323] The first main electrode 113k1 can be provided (or configured) at an edge portion (or a first edge portion or a first peripheral portion) of the electrode region ER of the vibration generating portion 110 or the vibration portion 111, adjacent to one long side (or first long side). For example, the first main electrode 113k1 can be provided (or configured) at an edge portion (or a first edge portion or a first peripheral portion) of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER. The first main electrode 113k1 can be provided (or configured) at an edge portion (or a first peripheral portion) of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER, extending in a linear shape parallel to the second direction Y or the long side of the vibration portion 111.

[0324] In each of the first to fifth electrode layers 113-1 to 113-5, the second main electrode 113k2 may be provided (or configured) at another edge portion (or second edge portion) adjacent to another long side (or second long side) of the electrode region ER of the vibrating portion 111, spaced apart from and parallel to the first main electrode 113k1. For example, the second main electrode 113k2 may be provided (or configured) at another edge portion (or second edge portion or second peripheral portion) of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER. The second main electrode 113k2 may be provided (or configured) at another edge portion (or second peripheral portion) of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER, extending in a linear shape parallel to the second direction Y or the long side of the vibrating portion 111.

[0325] In each of the first to fifth electrode layers 113-1 to 113-5, the sub-electrode 113m may be disposed (or arranged) between the first main electrode 113k1 and the second main electrode 113k2, so as to be spaced apart from and parallel to the first and second main electrodes 113k1 and 113k2. The sub-electrode 113m may be disposed (or arranged) in the central portion of the electrode region ER, parallel to each of the first and second main electrodes 113k1 and 113k2. For example, the sub-electrode 113m may be disposed (or arranged) in the central portion of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER. The sub-electrode 113m may be disposed (or arranged) in the central portion of each of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER, so as to extend in a linear shape parallel to the second direction Y or the long side of the vibrating portion 111.

[0326] Each of the first main electrode 113k1, the second main electrode 113k2, and the sub-electrode 113m may have a length parallel to the second direction Y and a width parallel to the first direction X. The first main electrode 113k1, the second main electrode 113k2, and the sub-electrode 113m may have the same size (or area), but embodiments of the present disclosure are not limited thereto. The first main electrode 113k1, the second main electrode 113k2, and the sub-electrode 113m may have the same length and the same width, but embodiments of the present disclosure are not limited thereto. For example, the size (or width) of the sub-electrode 113m may be larger than the first main electrode 113k1 and the second main electrode 113k2.

[0327] According to an embodiment of the present invention, the size of the main electrode 113 k may be larger than the total size of the sub-electrode 113 m. For example, the ratio of the size of the main electrode 113 k to the total size of the sub-electrode 113 m may be 10:8 to 10:2.

[0328] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, one or more first electrode connection lines 113n1 may be provided (or configured) to electrically connect the first main electrode 113k1 to the sub-electrode 113m. One or more first electrode connection lines 113n1 may be provided (or configured) in a portion between the first main electrode 113k1 and the sub-electrode 113m. For example, one or more first electrode connection lines 113n1 may be used for electrical connection between the first main electrode 113k1 and the sub-electrode 113m, and therefore may include a line shape having a relatively thin width. Therefore, the first main electrode 113k1 and the sub-electrode 113m may be electrically connected to each other through one or more first electrode connection lines 113n1.

[0329] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, one or more second electrode connection lines 113n2 may be provided (or configured) to electrically connect the sub-electrode 113m to the second main electrode 113k2. One or more second electrode connection lines 113n2 may be provided (or configured) in a portion between the sub-electrode 113m and the second main electrode 113k2. For example, one or more second electrode connection lines 113n2 may be used for electrical connection between the sub-electrode 113m and the second main electrode 113k2, and therefore may include a relatively thin line shape. Therefore, the sub-electrode 113m and the second main electrode 113k2 may be electrically connected to each other through one or more second electrode connection lines 113n2.

[0330] In each of the first to fifth electrode layers 113-1 to 113-5, the sub-electrode 113m may be electrically connected to the first main electrode 113k1 via one or more first electrode connection lines 113n1 and may be electrically connected to the second main electrode 113k2 via one or more second electrode connection lines 113n2.

[0331] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from one lateral side (or one short side) of the first main electrode 113k1 adjacent to the connection region CR toward the connection region CR. In addition to the first extension pattern 113e1 extending from the first main electrode 113k1, the first extension pattern 113e1 may be the same as that described above with reference to Figures 1 to 7 The first extension pattern 113e1 described is the same or substantially the same, and thus description thereof is omitted.

[0332] The second extension pattern 113e2 of the electrode layers 113-2 and 113-4 included in the second group 113G2 provided (or configured) among the first electrode layer 113-1 to the fifth electrode layer 113-5 may extend from one lateral side (or one short side) of the sub-electrode 113m adjacent to the connection region CR toward the connection region CR. In addition to extending from the sub-electrode 113m, the second extension pattern 113e2 may be the same as that described above with reference to FIG. Figures 1 to 7 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0333] The vibration generating portion 110 or the electrode portion 113 according to an embodiment of the present disclosure may include a patterned area 113p, which is provided (or configured) at an area between the first main electrode 113k1, the second main electrode 113k2 and the sub-electrode 113m of each of the first electrode layer 113-1 to the fifth electrode layer 113-5.

[0334] The patterned region 113 p may include one or more first patterned regions 113 p 1 and one or more second patterned regions 113 p 2 .

[0335] One or more first patterned regions 113p1 may be disposed (or configured) between the first main electrode 113k1 and the sub-electrode 113m. For example, one or more first patterned regions 113p1 may be regions between the first main electrode 113k1 and the sub-electrode 113m. For example, between the first main electrode 113k1 and the sub-electrode 113m, the one or more first patterned regions 113p1 may be divided into a plurality of regions by one or more first electrode connection lines 113n1.

[0336] One or more second patterned regions 113p2 may be disposed (or configured) between the sub-electrode 113m and the second main electrode 113k2. For example, the one or more second patterned regions 113p2 may be regions between the sub-electrode 113m and the second main electrode 113k2. For example, between the sub-electrode 113m and the second main electrode 113k2, the one or more second patterned regions 113p2 may be divided into a plurality of regions by one or more second electrode connection lines 113n2.

[0337] The vibration device 100 according to the tenth embodiment of the present disclosure may have the same Figures 1 to 7 The same effect as described for the vibration device 100.

[0338] Figure 32 A vibration device according to another embodiment (or eleventh embodiment) of the present disclosure is illustrated. Figure 33 Illustrated according to an embodiment of the present disclosure Figure 32 The vibration generating section shown in . Figure 34 Illustrated according to an embodiment of the present disclosure Figure 32 and Figure 33 The electrode portion shown in . Figures 32 to 34 By changing the above reference Figures 1 to 7 The embodiment of the invention is realized by the electrode portion of the vibration device described above. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 32 to 34 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements and their repeated descriptions are omitted.

[0339] Reference Figures 32 to 34In the vibration generating portion 110 of the vibration device 100 according to the eleventh embodiment of the present disclosure, the electrode portion 113 or each of the first to fifth electrode layers 113 - 1 to 113 - 5 may include a main electrode 113 o , a patterned region 113 p , and a sub-electrode 113 q .

[0340] In each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113o may be provided (or configured) at the electrode region ER of the vibration generating portion 110 or the vibration portion 111. For example, the main electrode 113o may be provided (or configured) at all of the first to fourth regions R1, R2, R3, and R4 of the electrode region ER.

[0341] The patterned region 113p may be provided (or configured) on the main electrode 113o. For example, the patterned region 113p may be provided (or configured) on the main electrode 113o to correspond to a peripheral region of the peripheral vibration region of the vibration portion 111, based on the frequency-based vibration characteristics (or vibration mode shape) of the vibration device 100 or the vibration generating portion 110. For example, the patterned region 113p may be provided (or configured) on the main electrode 113o to correspond to the effective vibration region (or peripheral region) of the vibration portion 111.

[0342] The patterned region 113 p according to an embodiment of the present disclosure may include one or more first patterned regions 113 p 1 and one or more second patterned regions 113 p 2 .

[0343] One or more first patterned regions 113p1 may be provided (or configured) with the main electrode 113o in the first region R1 of the electrode region ER. For example, the one or more first patterned regions 113p1 may be provided (or configured) by patterning (or removing) a portion of the main electrode 113o in the first region R1 of the electrode region ER. For example, the one or more first patterned regions 113p1 may be regions provided by removing a portion of the main electrode 113o in the first region R1 of the electrode region ER, or may be regions where the main electrode 113o is not provided in the first region R1 of the electrode region ER. For example, the one or more first patterned regions 113p1 may include a rectangular shape, but embodiments of the present disclosure are not limited thereto. Therefore, in each of the first to fourth vibration layers 111-1 to 111-4, regions in the first region R1 of the electrode region ER that correspond to (or overlap with) the one or more first patterned regions 113p1 may not be covered by the main electrode 113o and may be exposed by the one or more first patterned regions 113p1.

[0344] The patterned region 113p may include a plurality of first patterned regions 113p1 disposed (or arranged) in the first region R1 of the electrode region ER. For example, the patterned region 113p may include four first patterned regions 113p1 disposed (or arranged) in the main electrode 113o in the first region R1 of the electrode region ER, but embodiments of the present disclosure are not limited thereto. The plurality of first patterned regions 113p1 may be disposed (or arranged) at predetermined intervals along the first direction X or the short side length direction of the vibrating portion 111.

[0345] One or more second patterned regions 113p2 may be disposed (or configured) at the main electrode 113o in the fourth region R4 of the electrode region ER. For example, the one or more second patterned regions 113p2 may be disposed (or configured) by patterning (or removing) a portion of the main electrode 113o in the fourth region R4 of the electrode region ER. For example, the one or more second patterned regions 113p2 may be regions configured by removing a portion of the main electrode 113o in the fourth region R4 of the electrode region ER, or may be regions where the main electrode 113o is not disposed in the fourth region R4 of the electrode region ER. For example, the one or more second patterned regions 113p2 may include a rectangular shape, but embodiments of the present disclosure are not limited thereto. Therefore, in each of the first to fourth vibration layers 111-1 to 111-4, regions within the fourth region R4 of the electrode region ER that correspond to (or overlap) the one or more second patterned regions 113p2 may not be covered by the main electrode 113o and may be exposed by the one or more second patterned regions 113p2.

[0346] The patterned region 113p may include a plurality of second patterned regions 113p2 disposed (or arranged) in the fourth region R4 of the electrode region ER. For example, the patterned region 113p may include four second patterned regions 113p2 disposed (or arranged) in the main electrode 113o in the fourth region R4 of the electrode region ER, but embodiments of the present disclosure are not limited thereto. The plurality of second patterned regions 113p2 may be disposed (or arranged) at predetermined intervals along the first direction X or the short side length direction of the vibrating portion 111.

[0347] The one or more first patterned regions 113p1 and the one or more second patterned regions 113p2 may have a symmetrical structure relative to the central portion of the main electrode 113o, but the embodiments of the present disclosure are not limited thereto. For example, depending on the frequency-based vibration characteristics (or vibration mode shape) of the vibration device 100 or the vibration generating portion 110, the one or more first patterned regions 113p1 and the one or more second patterned regions 113p2 may have an asymmetrical structure relative to the central portion of the main electrode 113o.

[0348] The sub-electrode 113q may include a first sub-electrode 113q1 and a second sub-electrode 113q2.

[0349] The first sub-electrode 113q1 may include a side region of the main electrode 113o that surrounds one or more first patterned regions 113p1. For example, the first sub-electrode 113q1 may be disposed (or arranged) at the first region R1 of the electrode region ER within the main electrode 113o and may include a side region of the main electrode 113o that surrounds one or more first patterned regions 113p1. For example, the first sub-electrode 113q1 may have a two-dimensional "E" shape.

[0350] The second sub-electrode 113q2 may include the other side region of the main electrode 113o that surrounds one or more second patterned regions 113p2. For example, the second sub-electrode 113q2 may be disposed (or arranged) at the fourth region R4 of the electrode region ER within the main electrode 113o and may include the other side region of the main electrode 113o that surrounds one or more second patterned regions 113p2. For example, the second sub-electrode 113q2 may have a two-dimensional "E" shape.

[0351] According to another embodiment of the present disclosure, in each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113o may be disposed (or configured) in the middle region MR of the electrode region ER. For example, the main electrode 113o may be disposed (or configured) in the second region R2 and the third region R3 of the electrode region ER.

[0352] In each of the first to fifth electrode layers 113-1 to 113-5, the first sub-electrode 113q1 may include a plurality of first protruding patterns protruding from one side of the main electrode 113o in the middle region MR of the electrode region ER to the first region R1 of the electrode region ER, and a first pattern electrode commonly connected to the ends of each of the plurality of first protruding patterns. For example, the first sub-electrode 113q1 may have a two-dimensional "E" shape based on the plurality of first protruding patterns and the first pattern electrode. For example, one or more first patterned regions 113p1 may include a region surrounded by one side of the main electrode 113o, the plurality of first protruding patterns, and the first pattern electrode.

[0353] In each of the first to fifth electrode layers 113-1 to 113-5, the second sub-electrode 113q2 may include a plurality of second protruding patterns protruding from the other side of the main electrode 113o in the middle region MR of the electrode region ER to the fourth region R4 of the electrode region ER, and a second pattern electrode commonly connected to the ends of each of the plurality of second protruding patterns. For example, the second sub-electrode 113q2 may have a two-dimensional "E" shape based on the plurality of second protruding patterns and the second pattern electrode. For example, one or more second patterned regions 113p2 may include a region surrounded by the other side of the main electrode 113o, the plurality of second protruding patterns, and the second pattern electrode.

[0354] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from one side of a transverse side (or a short side) of the first sub-electrode 113q1 adjacent to the connection region CR toward the connection region CR. In addition to extending from the first sub-electrode 113q1, the first extension pattern 113e1 may be similar to the above-mentioned Figures 1 to 7 The first extension patterns 113e1 described are the same or substantially the same, and thus description thereof is omitted.

[0355] The second extension pattern 113e2 provided (or configured) at the electrode layers 113-2 and 113-4 included in the second group 113G2 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from the other side of one lateral side (or one short side) of the first sub-electrode 113q1 adjacent to the connection region CR toward the connection region CR. In addition to extending from the first sub-electrode 113q1, the second extension pattern 113e2 may be similar to the above-mentioned Figures 1 to 7 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0356] In the vibration device 100 according to the eleventh embodiment of the present disclosure, the vibration generating portion 110 or the electrode portion 113 may further include a dummy pattern 113i. Each of the first to fifth electrode layers 113-1 to 113-5 may further include a dummy pattern 113i.

[0357] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, a dummy pattern 113i may be provided (or configured) at the patterned region 113p to be electrically isolated (or insulated) from the main electrode 113o. The dummy pattern 113i may be provided (or configured) in an island shape within the patterned region 113p to be electrically isolated (or insulated) from the main electrode 113o. For example, the dummy pattern 113i may be an island pattern, a non-driving electrode, or a non-driving main electrode.

[0358] The dummy pattern 113i may be formed at the corresponding vibration layers 111-1 to 111-4 together with each of the first to fifth electrode layers 113-1 to 113-5. For example, the dummy pattern 113i may be an electrode material layer of the electrode layers 113-1 to 113-5 that is not patterned or removed by the patterning process of each of the first to fifth electrode layers 113-1 to 113-5 and remains intact.

[0359] The dummy patterns 113i can minimize the space (or gap space) between the vertically stacked first to fourth vibration layers 111-1, 111-4, thereby minimizing or preventing damage to the vibration layers in the spaces between the first to fourth vibration layers 111-1, 111-4 or around the spacers due to pressure from the vibration generating unit 110. Furthermore, the dummy patterns 113i can increase the mass of each of the corresponding vibration layers 111-1 to 111-4. Consequently, the natural frequency of each of the first to fourth vibration layers 111-1, 111-4 can be increased due to the increased mass caused by the dummy patterns 113i.

[0360] The dummy pattern 113 i according to an embodiment of the present disclosure may include one or more first dummy patterns 113 i 1 and one or more second dummy patterns 113 i 2 .

[0361] One or more first dummy patterns 113i1 may be arranged (or configured) in an island shape within one or more first patterned regions 113p1 to be electrically disconnected from the main electrode 113o. One or more second dummy patterns 113i2 may be arranged (or configured) in an island shape within one or more second patterned regions 113p2 to be electrically disconnected (or insulated) from the main electrode 113o.

[0362] The vibration device 100 according to the eleventh embodiment of the present disclosure may have the same Figures 1 to 7 The vibration device 100 may have the same effect as described above and may include a dummy pattern 113i to minimize or prevent damage to the vibration layer occurring in the spaces between the first to fourth vibration layers 111-1 to 111-4 or in the periphery of the spacer.

[0363] Figure 35A vibration device according to another embodiment (or a twelfth embodiment) of the present disclosure is illustrated. Figure 36 Illustrated according to an embodiment of the present disclosure Figure 35 The vibration generating section shown in . Figure 37 Illustrated according to an embodiment of the present disclosure Figure 35 and Figure 36 The electrode portion shown in . Figures 35 to 37 By changing the above reference Figures 10 to 12 The embodiment of the invention is realized by the electrode portion of the vibration device described above. Figures 1 to 12 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 35 to 37 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements and their repeated descriptions are omitted.

[0364] Reference Figures 35 to 37 In the vibration generating portion 110 of the vibration device 100 according to the twelfth embodiment of the present disclosure, the electrode portion 113 or each of the first to fifth electrode layers 113 - 1 to 113 - 5 may include a main electrode 113 a , a sub-electrode 113 b , and a pattern electrode 113 c .

[0365] In each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113a, the sub-electrodes 113b, and the pattern electrode 113c may be disposed (or arranged) on the same plane as the corresponding vibration layers 111-1 to 111-4 and may be electrically connected to each other.

[0366] In each of the first to fifth electrode layers 113-1 to 113-5, the main electrode 113a may be provided at the second region R2 and the third region R3 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. The main electrode 113a of each of the first to fifth electrode layers 113-1 to 113-5 may be the same as that described above. Figures 1 to 12 The main electrodes 113 a described are substantially the same, and thus repeated descriptions thereof are omitted.

[0367] The sub-electrode 113b may be disposed (or arranged) in the same plane as the main electrode 113a. For example, the sub-electrode 113b may protrude (or extend) from the main electrode 113a in the same plane as the corresponding vibration layers 111-1 to 111-4.

[0368] The sub-electrode 113b may be provided at the first region R1 and the fourth region R4 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. The sub-electrode 113b may protrude (or extend) from each of a first side (or first short side) and a second side (or second short side) opposite to the first side of the main electrode 113a toward each of the first region R1 and the fourth region R4.

[0369] The sub-electrode 113b according to an embodiment of the present disclosure may include a plurality of first sub-electrodes 113b5 and a plurality of second sub-electrodes 113b6. For example, the sub-electrode 113b may include four first sub-electrodes 113b5 and four second sub-electrodes 113b6, but the embodiment of the present disclosure is not limited thereto.

[0370] Multiple (or four) first sub-electrodes 113b5 may be disposed at the electrode region ER of the vibration generating portion 110 or the vibration portion 111 in the corresponding vibration layers 111-1 to 111-4, adjacent to the connection region CR. The multiple first sub-electrodes 113b5 may be disposed at the first region R1 of the electrode region ER in the corresponding vibration layers 111-1 to 111-4, adjacent to the connection region CR. Each of the multiple first sub-electrodes 113b5 may protrude (or extend) from one side (or first side) of the main electrode 113a toward the first region R1 of the electrode region ER. For example, the multiple first sub-electrodes 113b5 may be disposed (or arranged) to be spaced apart and parallel to each other. One or more of the multiple first sub-electrodes 113b5 may have different sizes (or areas).

[0371] Multiple (or four) second sub-electrodes 113b6 may be disposed at the fourth region R4 of the electrode region ER of the corresponding vibration layers 111-1 to 111-4. Each of the multiple second sub-electrodes 113b6 may protrude (or extend) in the corresponding vibration layers 111-1 to 111-4 in a direction opposite to the multiple first sub-electrodes 113b5. Each of the multiple second sub-electrodes 113b6 may protrude (or extend) from another side (or second side) of the main electrode 113a toward the fourth region R4 of the electrode region ER. For example, the multiple second sub-electrodes 113b6 may be disposed (or configured) to be spaced apart and parallel to each other. One or more of the multiple second sub-electrodes 113b6 may have different sizes (or areas).

[0372] The plurality of first sub-electrodes 113b5 and the plurality of second sub-electrodes 113b6 may have a symmetrical structure with respect to one or more of a first direction X and a second direction Y passing through the central portions of the corresponding vibration layers 111-1 to 111-4. Due to the symmetry of the main electrode 113a and the sub-electrodes 113b, the driving signals applied to the electrode layers 113-1 to 113-5 may be uniformly applied to the corresponding vibration layers 111-1 to 111-4.

[0373] In each of the first electrode layer 113-1 to the fifth electrode layer 113-5, the pattern electrode 113c may be arranged (or configured) to be connected to the plurality of first sub-electrodes 113b5. The pattern electrode 113c may be arranged at the electrode region ER adjacent to the connection region CR. For example, the pattern electrode 113c may be arranged (or configured) at the electrode region ER between the plurality of first sub-electrodes 113b5 and the connection region CR. For example, the pattern electrode 113c may be arranged (or configured) at the first region R1 of the electrode region ER so as to be connected to the main electrode 113a with the plurality of first sub-electrodes 113b5 therebetween. The pattern electrode 113c may be arranged (or configured) to be commonly connected to the end of each of the plurality of first sub-electrodes 113b5. Therefore, the main electrode 113a may be electrically connected to the pattern electrode 113c through the plurality of first sub-electrodes 113b5.

[0374] The first extension pattern 113e1 provided (or configured) at the electrode layers 113-1, 113-3, and 113-5 included in the first group 113G1 among the first electrode layers 113-1 to the fifth electrode layer 113-5 may extend from one side of a transverse side (or a short side) of the pattern electrode 113c adjacent to the connection region CR toward the connection region CR. In addition to extending from the pattern electrode 113c, the first extension pattern 113e1 may be similar to the above-mentioned Figures 1 to 12 The first extension pattern 113e1 described is the same or substantially the same, and thus description thereof is omitted.

[0375] The second extension pattern 113e2 provided (or configured) at the electrode layers 113-2 and 113-4 included in the second group 113G2 among the first electrode layer 113-1 to the fifth electrode layer 113-5 may extend from the other side of one lateral side (or one short side) of the pattern electrode 113c adjacent to the connection region CR toward the connection region CR. In addition to extending from the pattern electrode 113c, the second extension pattern 113e2 may be similar to the above referenced embodiment. Figures 1 to 12 The second extension pattern 113e2 described is the same or substantially the same, and thus description thereof is omitted.

[0376] The vibration generating portion 110 or the electrode portion 113 according to an embodiment of the present disclosure may include a patterned region 113p, which is disposed (or configured) at the peripheral region of each of the main electrode 113a and the sub-electrode 113b of each of the first electrode layer 113-1 to the fifth electrode layer 113-5. Each of the first electrode layer 113-1 to the fifth electrode layer 113-5 may include one or more patterned regions 113p disposed (or configured) at the peripheral region of the sub-electrode 113b. For example, the first electrode layer 113-1 to the fifth electrode layer 113-5 may include patterned regions 113p corresponding to the respective corners of the vibration layers 111-1 to 111-4, the peripheral regions of the plurality of first sub-electrodes 113b5, and the peripheral regions of the plurality of second sub-electrodes 113b6.

[0377] The patterned region 113 p may include a plurality of first patterned regions 113 p 1 and a plurality of second patterned regions 113 p 2 .

[0378] Each of the plurality of first patterned regions 113p1 can be disposed (or configured) in a region between the plurality of first sub-electrodes 113b5. Each of the plurality of first patterned regions 113p1 can be surrounded by the main electrode 113a, the plurality of first sub-electrodes 113b5, and the pattern electrode 113c. Each of the plurality of first patterned regions 113p1 can be disposed (or configured) in a first region R1 of the electrode region ER. For example, each of the plurality of first patterned regions 113p1 can be disposed (or configured) in an island shape in a region between the plurality of first sub-electrodes 113b5.

[0379] The second patterned region 113b2 may be provided (or configured) to include the region between the plurality of second sub-electrodes 113b6 and the peripheral region of each of the plurality of second sub-electrodes 113b6. For example, the second patterned region 113p2 may be provided (or configured) to correspond to the region between the plurality of second sub-electrodes 113b6 and the other short side (or the second short side) of the vibration portion 111.

[0380] In the vibration device 100 according to the twelfth embodiment of the present disclosure, the vibration generating part 110 or the electrode part 113 may further include a dummy pattern part 113 d .

[0381] The dummy pattern portion 113d according to an embodiment of the present disclosure may include first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 corresponding to corners of each of the first to fourth vibration layers 111-1 to 111-4. The first to fourth dummy patterns 113d1, 113d2, 113d3, and 113d4 may be aligned with the reference pattern. Figure 8 and Figure 9The above-mentioned first to fourth dummy patterns 113d1, 113d2, 113d3 and 113d4 are substantially the same, and thus repeated descriptions thereof are omitted.

[0382] The electrode portion 113 or the dummy pattern portion 113 d according to an embodiment of the present disclosure may further include an electrode connection line 113L configured to be electrically connected to the first to fourth dummy patterns 113 d 1 , 113 d 2 , 113 d 3 , and 113 d 4 .

[0383] The electrode connection line 113L may include: a first electrode connection line 113L1 configured to electrically connect the first dummy pattern 113d1 to the third dummy pattern 113d3; a second electrode connection line 113L2 configured to electrically connect the second dummy pattern 113d2 to the fourth dummy pattern 113d4; and a third electrode connection line 113L3 configured to electrically connect the third dummy pattern 113d3 to the fourth dummy pattern 113d4. The first to third electrode connection lines 113L1, 113L2, and 113L3 may be the same as those described above. Figures 10 to 12 The first to third electrode connection lines 113L1 , 113L2 , and 113L3 are described to be substantially the same, and thus repeated descriptions thereof are omitted.

[0384] In the vibration device 100 according to the twelfth embodiment of the present disclosure, the vibration generating portion 110 or the electrode portion 113 may further include one or more (or three) virtual protruded lines 113Lp.

[0385] One or more virtual protruding lines 113Lp may protrude (or extend) from the third electrode connection line 113L3 of the dummy pattern portion 113d toward one or more of the regions between the plurality of second sub-electrodes 113b6. For example, each of the three virtual protruding lines 113Lp may protrude (or extend) from one side of the third electrode connection line 113L3 toward the region between the four second sub-electrodes 113b6. For example, one or more virtual protruding lines 113Lp may protrude (or extend) from the third electrode connection line 113L3 toward the second patterned region 113p2 between the plurality of second sub-electrodes 113b6. For example, each of the three virtual protruding lines 113Lp may protrude (or extend) from one side of the third electrode connection line 113L3 toward the second patterned region 113p2 between the four second sub-electrodes 113b6.

[0386] In the vibration device 100 according to the twelfth embodiment of the present disclosure, the vibration generating part 110 or the electrode part 113 may further include a plurality of auxiliary patterns 113 r.

[0387] A plurality of auxiliary patterns 113r may be provided (or configured) at each of the plurality of first patterned regions 113p1. The plurality of auxiliary patterns 113r may be provided (or configured) in an island shape at each of the plurality of first patterned regions 113p1 to be electrically disconnected (or insulated) from the main electrode 113a, the plurality of first sub-electrodes 113b5, and the pattern electrode 113c.

[0388] The vibration device 100 according to the twelfth embodiment of the present invention may have the same Figures 1 to 12 The same effect as described for the vibration device 100.

[0389] Figure 38 A vibration generating portion of a vibration device according to another embodiment (or a thirteenth embodiment) of the present disclosure is illustrated. Figure 39 Illustrated according to an embodiment of the present disclosure Figure 38 The electrode portion and the bonding member shown in . Figure 40 According to the embodiment of the present disclosure Figure 38 A cross-sectional view taken along line EE' shown in FIG. Figure 41 According to the embodiment of the present disclosure Figure 38 A cross-sectional view taken along line FF' shown in FIG. Figures 38 to 41 Illustrated modification of the above reference Figures 1 to 7 The embodiment of the electrode portion of the vibration device described above and additionally configured with an adhesive member. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 38 to 41 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements and their repeated descriptions are omitted.

[0390] Reference Figures 38 to 41 In the vibration generating portion 110 of the vibration device 100 according to the thirteenth embodiment of the present disclosure, the electrode portion 113 may include a plurality of electrode layers 113-1 to 113-8. For example, the electrode portion 113 may include first to eighth electrode layers 113-1 to 113-8.

[0391] Each of the first electrode layer 113-1 to the fifth electrode layer 113-5 of the electrode portion 113 may be the same as that described above. Figures 1 to 7 Each of the described first to fifth electrode layers 113 - 1 to 113 - 5 is substantially the same, and thus repeated descriptions thereof are omitted.

[0392] The sixth electrode layer 113-6 of the electrode portion 113 may be disposed (or configured) between the first vibration layer 111-1 and the second electrode layer 113-2. The sixth electrode layer 113-6 may be electrically connected to the second surface 111s2 of the first vibration layer 111-1. The sixth electrode layer 113-6 may overlap the first electrode layer 113-1 with the first vibration layer 111-1 therebetween. For example, the first electrode layer 113-1 may be an upper electrode layer (or first upper electrode layer) of the first vibration layer 111-1, and the sixth electrode layer 113-6 may be a lower electrode layer (or first lower electrode layer) of the first vibration layer 111-1. Therefore, the first vibration layer 111-1 may vibrate based on a drive signal applied from the outside through the first electrode layer 113-1 and the sixth electrode layer 113-6.

[0393] The sixth electrode layer 113-6 may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The sixth electrode layer 113-6 may further include a first connection pattern 112b. The main electrode 113a, the one or more sub-electrodes 113b, and the first connection pattern 112b of the sixth electrode layer 113-6 may be substantially the same as the main electrode 113a, the one or more sub-electrodes 113b, and the first connection pattern 112b of the second electrode layer 113-2, respectively. Therefore, the same reference numerals denote the same elements and their repeated description is omitted.

[0394] The seventh electrode layer 113-7 of the electrode portion 113 may be disposed (or configured) between the second vibration layer 111-2 and the third electrode layer 113-3. The seventh electrode layer 113-7 may be electrically connected to the second surface 111s2 of the second vibration layer 111-2. The seventh electrode layer 113-7 may overlap with the second electrode layer 113-2 with the second vibration layer 111-2 therebetween. For example, the second electrode layer 113-2 may be an upper electrode layer (or second upper electrode layer) of the second vibration layer 111-2, and the seventh electrode layer 113-7 may be a lower electrode layer (or second lower electrode layer) of the second vibration layer 111-2. Therefore, the second vibration layer 111-2 may vibrate based on a drive signal applied from the outside via the second electrode layer 113-2 and the seventh electrode layer 113-7.

[0395] The seventh electrode layer 113-7 may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The seventh electrode layer 113-7 may further include a second connection pattern 112c. The main electrode 113a, the one or more sub-electrodes 113b, and the second connection pattern 112c of the seventh electrode layer 113-7 may be substantially the same as the main electrode 113a, the one or more sub-electrodes 113b, and the second connection pattern 112c of the third electrode layer 113-3, respectively. Therefore, the same reference numerals refer to the same elements, and repeated description thereof will be omitted.

[0396] The eighth electrode layer 113-8 of the electrode portion 113 may be disposed (or arranged) between the third vibration layer 111-3 and the fourth electrode layer 113-4. The eighth electrode layer 113-8 may be electrically connected to the second surface 111s2 of the third vibration layer 111-3. The eighth electrode layer 113-8 may overlap the third electrode layer 113-3 with the third vibration layer 111-3 therebetween. For example, the third electrode layer 113-3 may be an upper electrode layer (or third upper electrode layer) of the third vibration layer 111-3, and the eighth electrode layer 113-8 may be a lower electrode layer (or third lower electrode layer) of the third vibration layer 111-3. Therefore, the third vibration layer 111-3 may vibrate based on a drive signal applied externally through the third electrode layer 113-3 and the eighth electrode layer 113-8.

[0397] The eighth electrode layer 113-8 may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The eighth electrode layer 113-8 may further include a first connection pattern 112b. The main electrode 113a, the one or more sub-electrodes 113b, and the second connection pattern 112c of the eighth electrode layer 113-8 may be substantially the same as the main electrode 113a, the one or more sub-electrodes 113b, and the second connection pattern 112c of the fourth electrode layer 113-4, respectively. Therefore, the same reference numerals denote the same elements and their repeated description is omitted.

[0398] The fourth electrode layer 113-4 of the electrode portion 113 may be an upper electrode layer (or a fourth upper electrode layer) of the fourth vibration layer 111-4, and the fifth electrode layer 113-5 may be a lower electrode layer (or a fourth lower electrode layer) of the fourth vibration layer 111-4. Therefore, the fourth vibration layer 111-4 may vibrate based on a driving signal applied from the outside through the fourth electrode layer 113-4 and the fifth electrode layer 113-5.

[0399] In the vibration device 100 or the vibration generating portion 110 according to the thirteenth embodiment of the present disclosure, the first connection member 118A may be configured to be electrically connected to the first group of electrode layers 113-1, 113-3, 113-5, and 113-7 among the first electrode layer 113-1 to the eighth electrode layer 113-8. The first connection member 118A may be formed (or provided) at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113, and may be electrically (or commonly) connected (or bonded to or in contact with) the first sub-electrode 113b1 (or first extension pattern 113e1) of each of the first electrode layer 113-1, the third electrode layer 113-3, the fifth electrode layer 113-5, and the seventh electrode layer 113-7 among the first electrode layer 113-1 to the eighth electrode layer 113-8.

[0400] In the vibration device 100 or the vibration generating portion 110 according to the thirteenth embodiment of the present disclosure, the second connection member 118B may be configured to be electrically connected to the second group of electrode layers 113-2, 113-4, 113-6, and 113-8 among the first electrode layer 113-1 to the eighth electrode layer 113-8. The second connection member 118B may be formed (or provided) at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113 so as to be electrically disconnected (or insulated) from the first connection member 118A, and the second connection member 118B may be electrically (or commonly) connected (or bonded to or in contact with) the second sub-electrode 113b2 (or second extension pattern 113e2) of each of the second electrode layer 113-2, the fourth electrode layer 113-4, the sixth electrode layer 113-6, and the eighth electrode layer 113-8 among the first electrode layer 113-1 to the eighth electrode layer 113-8.

[0401] The vibration device 100 or the vibration generating portion 110 according to the thirteenth embodiment of the present disclosure may further include a bonding member (or adhesive member) 115 .

[0402] Adhesive member 115 may be disposed (or configured) between two vertically adjacent electrode layers, which are disposed (or configured) between two vertically adjacent vibration layers among the plurality of vibration layers 111-1 to 111-4. Adhesive member 115 may be configured to electrically connect (or bond) the two vertically adjacent electrode layers disposed (or configured) between the two vertically adjacent vibration layers. Adhesive member 115 may include a conductive adhesive material. Thus, adhesive member 115 may enhance the adhesive force (or bonding force) between the two vertically adjacent electrode layers between the two vertically adjacent vibration layers.

[0403] The adhesive member 115 according to an embodiment of the present disclosure may include first to third adhesive members 115 - 1 , 115 - 2 , and 115 - 3 .

[0404] The first adhesive member 115-1 may be disposed (or inserted) between the sixth electrode layer 113-6 and the second electrode layer 113-2, which are disposed between the first vibration layer 111-1 and the second vibration layer 111-2. For example, the first adhesive member 115-1 may be bonded (or inserted) between the first lower electrode of the first vibration layer 111-1 and the second upper electrode of the second vibration layer 111-2. Thus, the second electrode layer 113-2 may be electrically connected (or bonded) to the sixth electrode layer 113-6 via the first adhesive member 115-1.

[0405] The first adhesive member 115-1 may have the same shape and size as the second electrode layer 113-2. For example, the first adhesive member 115-1 may include a first adhesive pattern 115a and one or more second adhesive patterns 115b. The first adhesive member 115-1 may further include a third adhesive pattern 115c.

[0406] In the first adhesive member 115-1, the first adhesive pattern 115a may have the same shape and the same size as the main electrode 113a of the second electrode layer 113-2. The first adhesive pattern 115a may be adhered (or inserted) between the main electrode 113a of the second electrode layer 113-2 and the main electrode 113a of the sixth electrode layer 113-6. Therefore, the main electrode 113a of the sixth electrode layer 113-6 and the main electrode 113a of the second electrode layer 113-2 may be electrically (or commonly) connected (or bonded) to the first adhesive pattern 115a.

[0407] In the first adhesive member 115-1, one or more second adhesive patterns 115b may have the same shape and size as one or more sub-electrodes 113b of the second electrode layer 113-2. One or more second adhesive patterns 115b may be adhered (or inserted) between one or more sub-electrodes 113b of the second electrode layer 113-2 and one or more sub-electrodes 113b of the sixth electrode layer 113-6. Therefore, one or more sub-electrodes 113b of the sixth electrode layer 113-6 and one or more sub-electrodes 113b of the second electrode layer 113-2 may be electrically (or commonly) connected (or bonded) to the one or more second adhesive patterns 115b.

[0408] In the first adhesive member 115-1, the third adhesive pattern 115c may have the same shape and size as the first connection pattern 112b of the second electrode layer 113-2. The third adhesive pattern 115c may be adhered (or inserted) between the first connection pattern 112b of the second electrode layer 113-2 and the first connection pattern 112b of the sixth electrode layer 113-6. Therefore, the first connection pattern 112b of the sixth electrode layer 113-6 and the first connection pattern 112b of the second electrode layer 113-2 may be electrically (or commonly) connected (or bonded) to the third adhesive pattern 115c.

[0409] The second adhesive member 115-2 may be disposed (or inserted) between the seventh electrode layer 113-7 and the third electrode layer 113-3, which are disposed between the second vibration layer 111-2 and the third vibration layer 111-3. The second adhesive member 115-2 may be configured to electrically connect the seventh electrode layer 113-7 to the third electrode layer 113-3. For example, the second adhesive member 115-2 may be adhered (or inserted) between the second lower electrode of the second vibration layer 111-2 and the third upper electrode of the third vibration layer 111-3. Thus, the third electrode layer 113-3 may be electrically connected (or adhered) to the seventh electrode layer 113-7 via the second adhesive member 115-2.

[0410] The second adhesive member 115-2 may have the same shape and size as the third electrode layer 113-3. For example, the second adhesive member 115-2 may include a first adhesive pattern 115a and one or more second adhesive patterns 115b. The second adhesive member 115-2 may further include a third adhesive pattern 115c.

[0411] In the second adhesive member 115-2, the first adhesive pattern 115a may have the same shape and the same size as the main electrode 113a of the third electrode layer 113-3. The first adhesive pattern 115a may be adhered (or inserted) between the main electrode 113a of the third electrode layer 113-3 and the main electrode 113a of the seventh electrode layer 113-7. Therefore, the main electrode 113a of the seventh electrode layer 113-7 and the main electrode 113a of the third electrode layer 113-3 may be electrically (or commonly) connected (or bonded) to the first adhesive pattern 115a.

[0412] In the second adhesive member 115-2, one or more second adhesive patterns 115b may have the same shape and size as one or more sub-electrodes 113b of the third electrode layer 113-3. One or more second adhesive patterns 115b may be adhered (or inserted) between one or more sub-electrodes 113b of the third electrode layer 113-3 and one or more sub-electrodes 113b of the seventh electrode layer 113-7. Therefore, one or more sub-electrodes 113b of the seventh electrode layer 113-7 and one or more sub-electrodes 113b of the third electrode layer 113-3 may be electrically (or commonly) connected (or bonded) to the one or more second adhesive patterns 115b.

[0413] In the second adhesive member 115-2, the third adhesive pattern 115c may have the same shape and size as the second connection pattern 112c of the third electrode layer 113-3. The third adhesive pattern 115c may be adhered (or inserted) between the second connection pattern 112c of the third electrode layer 113-3 and the second connection pattern 112c of the seventh electrode layer 113-7. Therefore, the second connection pattern 112c of the seventh electrode layer 113-7 and the second connection pattern 112c of the third electrode layer 113-3 may be electrically (or commonly) connected (or bonded) to the third adhesive pattern 115c.

[0414] The third adhesive member 115-3 may be disposed (or inserted) between the eighth electrode layer 113-8 and the fourth electrode layer 113-4, which are disposed between the third vibration layer 111-3 and the fourth vibration layer 111-4. The third adhesive member 115-3 may be configured to electrically connect the eighth electrode layer 113-8 to the fourth electrode layer 113-4. For example, the third adhesive member 115-3 may be adhered (or inserted) between the third lower electrode of the third vibration layer 111-3 and the fourth upper electrode of the fourth vibration layer 111-4. Thus, the fourth electrode layer 113-4 may be electrically connected (or adhered) to the eighth electrode layer 113-8 via the third adhesive member 115-3.

[0415] The third adhesive member 115-3 may have the same shape and size as the fourth electrode layer 113-4. For example, the third adhesive member 115-3 may include a first adhesive pattern 115a and one or more second adhesive patterns 115b. In addition, the first adhesive member 115-1 may include a third adhesive pattern 115c.

[0416] In the third adhesive member 115-3, the first adhesive pattern 115a may have the same shape and size as the main electrode 113a of the fourth electrode layer 113-4. The first adhesive pattern 115a may be adhered (or inserted) between the main electrode 113a of the fourth electrode layer 113-4 and the main electrode 113a of the eighth electrode layer 113-8. Therefore, the main electrode 113a of the eighth electrode layer 113-8 and the main electrode 113a of the fourth electrode layer 113-4 may be electrically (or commonly) connected (or bonded) to the first adhesive pattern 115a.

[0417] In the third adhesive member 115-3, one or more second adhesive patterns 115b may have the same shape and size as one or more sub-electrodes 113b of the fourth electrode layer 113-4. One or more second adhesive patterns 115b may be adhered (or inserted) between one or more sub-electrodes 113b of the fourth electrode layer 113-4 and one or more sub-electrodes 113b of the eighth electrode layer 113-8. Therefore, one or more sub-electrodes 113b of the eighth electrode layer 113-8 and one or more sub-electrodes 113b of the fourth electrode layer 113-4 may be electrically (or commonly) connected (or bonded) to the one or more second adhesive patterns 115b.

[0418] In the third adhesive member 115-3, the third adhesive pattern 115c may have the same shape and size as the first connection pattern 112b of the fourth electrode layer 113-4. The third adhesive pattern 115c may be adhered (or inserted) between the first connection pattern 112b of the fourth electrode layer 113-4 and the first connection pattern 112b of the eighth electrode layer 113-8. Therefore, the first connection pattern 112b of the eighth electrode layer 113-8 and the first connection pattern 112b of the fourth electrode layer 113-4 may be electrically (or commonly) connected (or bonded) to the third adhesive pattern 115c.

[0419] Each of the first to third adhesive members 115-1, 115-2, and 115-3 according to an embodiment of the present disclosure may include a conductive adhesive material. For example, each of the first to third adhesive members 115-1, 115-2, and 115-3 may include a conductive material (or particles) and an adhesive material. For example, each of the first to third adhesive members 115-1, 115-2, and 115-3 may include a conductive epoxy resin, a conductive acrylic resin, a conductive silicone resin, or a conductive polyurethane resin, but embodiments of the present disclosure are not limited thereto.

[0420] The vibration device 100 according to the thirteenth embodiment of the present disclosure may have the same Figures 1 to 7 The vibration device 100 described above has the same effect as that of the vibration device 100 and may further include an adhesive member 115 , thereby enhancing adhesive force (or bonding force) between two electrode layers vertically adjacent to each other.

[0421] Refer to above Figures 38 to 41 The sixth to eighth electrode layers 113-6, 113-7 and 113-8 described above may be similarly applied (or added) to the Figures 8 to 37 The vibration device 100 of the second embodiment to the twelfth embodiment of the present disclosure is described, and therefore the description thereof is omitted. Figures 38 to 41The pattern structure of each of the electrode layers 113-1 to 113-8 described above may be changed to Figures 8 to 37 The patterned structure of the electrode layer is described.

[0422] Figure 42 A vibration generating portion of a vibration device according to another embodiment (or a fourteenth embodiment) of the present disclosure is illustrated. Figure 43 Illustrated according to an embodiment of the present disclosure Figure 42 The electrode portion and the bonding member shown in . Figure 44 According to the embodiment of the present disclosure Figure 44 A cross-sectional view taken along line GG' shown in FIG. Figure 45 According to the embodiment of the present disclosure Figure 44 A cross-sectional view taken along line H-H' shown in FIG. Figures 42 to 45 Illustrated reference Figures 1 to 7 The electrode portion of the vibration device described above is modified and an adhesive member is additionally provided. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the electrode portion may be included. Figures 42 to 45 In the description of the vibration device 100 shown in FIG, the same reference numerals denote the same elements and their repeated descriptions are omitted.

[0423] Reference Figures 42 to 45 In the vibration generating portion 110 of the vibration device 100 according to the fourteenth embodiment of the present disclosure, the electrode portion 113 may include a plurality of electrode layers 113-1 to 113-4. For example, the electrode portion 113 may include first to fourth electrode layers 113-1 to 113-4.

[0424] The first electrode layer 113-1 may be disposed (or configured) on the first vibration layer 111-1. The first electrode layer 113-1 may be disposed (or configured) on the first surface 111s1 and the second surface 111s2 of the first vibration layer 111-1. The first electrode layer 113-1 according to an embodiment of the present disclosure may include a first upper electrode layer 113-1a disposed (or configured) on the first surface 111s1 of the first vibration layer 111-1, and a first lower electrode layer 113-1b disposed (or configured) on the second surface 111s2 of the first vibration layer 111-1.

[0425] The first upper electrode layer 113-1a may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The first upper electrode layer 113-1a may further include a first connection pattern 112a. The main electrode 113a and one or more sub-electrodes 113b of the first upper electrode layer 113-1a and the first connection pattern 112a may be the same as those described above. Figures 1 to 7The main electrode 113 a and the one or more sub-electrodes 113 b and the first connection pattern 112 a of the described first electrode layer 113 - 1 are substantially the same, and thus repeated descriptions thereof are omitted.

[0426] The first lower electrode layer 113-1b may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The first lower electrode layer 113-1b may further include a second connection pattern 112b. In addition to the main electrode 113a and one or more sub-electrodes 113b of the first lower electrode layer 113-1b and the second connection pattern 112b being provided (or configured) at the second surface 111s2 of the first vibration layer 111-1, the main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the first lower electrode layer 113-1b may be the same as those described above. Figures 1 to 7 The main electrode 113 a and the one or more sub-electrodes 113 b of the second electrode layer 113 - 2 and the second connection pattern 112 b are substantially the same, and thus repeated descriptions thereof are omitted.

[0427] The second electrode layer 113-2 may be disposed (or configured) on the second vibration layer 111-2. The second electrode layer 113-2 may be disposed (or configured) on the first surface 111s1 and the second surface 111s2 of the second vibration layer 111-2. The second electrode layer 113-2 according to an embodiment of the present disclosure may include a second upper electrode layer 113-2a disposed (or configured) on the first surface 111s1 of the second vibration layer 111-2, and a second lower electrode layer 113-2b disposed (or configured) on the second surface 111s2 of the second vibration layer 111-2.

[0428] The second upper electrode layer 113-2a may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The second upper electrode layer 113-2a may further include a third connection pattern 112c. In addition to the main electrode 113a and one or more sub-electrodes 113b of the second upper electrode layer 113-2a and the third connection pattern 112c being disposed (or configured) at the first surface 111s1 of the second vibration layer 111-2, the main electrode 113a and one or more sub-electrodes 113b and the third connection pattern 112c of the second upper electrode layer 113-2a may be the same as those described above. Figures 1 to 7 The main electrode 113 a and the one or more sub-electrodes 113 b and the third connection pattern 112 c of the third electrode layer 113 - 3 are described to be substantially the same, and thus repeated description thereof is omitted.

[0429] The second lower electrode layer 113-2b may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The second lower electrode layer 113-2b may further include a second connection pattern 112b. In addition to the main electrode 113a and one or more sub-electrodes 113b of the second lower electrode layer 113-2b and the second connection pattern 112b being provided (or configured) at the second surface 111s2 of the second vibration layer 111-2, the main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the second lower electrode layer 113-2b may be the same as those described above. Figures 1 to 7 The main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the third electrode layer 113-3 are substantially the same, so their repeated description is omitted. For example, the second lower electrode layer 113-2b may be substantially the same as the first lower electrode layer 113-1b.

[0430] The third electrode layer 113-3 may be disposed (or configured) on the third vibration layer 111-3. The third electrode layer 113-3 may be disposed (or configured) on the first surface 111s1 and the second surface 111s2 of the third vibration layer 111-3. The third electrode layer 113-3 according to an embodiment of the present disclosure may include a third upper electrode layer 113-3a disposed (or configured) on the first surface 111s1 of the third vibration layer 111-3, and a third lower electrode layer 113-3b disposed (or configured) on the second surface 111s2 of the third vibration layer 111-3.

[0431] The third upper electrode layer 113-3a may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The third upper electrode layer 113-3a may further include a third connection pattern 112c. The main electrode 113a and one or more sub-electrodes 113b of the third upper electrode layer 113-3a and the third connection pattern 112c may be the same as those described above. Figures 1 to 7 The main electrode 113a and one or more sub-electrodes 113b and the third connection pattern 112c of the third electrode layer 113-3 are substantially the same, so repeated description thereof is omitted. For example, the third upper electrode layer 113-3a may be substantially the same as the second upper electrode layer 113-2a.

[0432] The third lower electrode layer 113-3b may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The third lower electrode layer 113-3b may further include a second connection pattern 112b. In addition to the main electrode 113a and one or more sub-electrodes 113b of the third lower electrode layer 113-3b and the second connection pattern 112b being disposed (or configured) at the second surface 111s2 of the third vibration layer 111-3, the main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the third lower electrode layer 113-3b may be the same as those described above. Figures 1 to 7 The main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the fourth electrode layer 113-4 are substantially the same. Therefore, their repeated description is omitted. For example, the third lower electrode layer 113-3b can be substantially the same as the second lower electrode layer 113-2b.

[0433] The fourth electrode layer 113-4 may be disposed (or configured) on the fourth vibration layer 111-4. The fourth electrode layer 113-4 may be disposed (or configured) on the first surface 111s1 and the second surface 111s2 of the fourth vibration layer 111-4. The fourth electrode layer 113-4 according to an embodiment of the present disclosure may include a fourth upper electrode layer 113-4a disposed (or configured) on the first surface 111s1 of the fourth vibration layer 111-4, and a fourth lower electrode layer 113-4b disposed (or configured) on the second surface 111s2 of the fourth vibration layer 111-4.

[0434] The fourth upper electrode layer 113-4a may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The fourth upper electrode layer 113-4a may further include a third connection pattern 112c. In addition to the main electrode 113a and one or more sub-electrodes 113b of the fourth upper electrode layer 113-4a and the third connection pattern 112c being disposed (or configured) at the first surface 111s1 of the fourth vibration layer 111-4, the main electrode 113a and one or more sub-electrodes 113b and the third connection pattern 112c of the fourth upper electrode layer 113-4a may be the same as those described above. Figures 1 to 7 The main electrode 113a and one or more sub-electrodes 113b of the fourth electrode layer 113-3 and the third connection pattern 112c are substantially the same, so their repeated description is omitted. For example, the fourth upper electrode layer 113-4a can be substantially the same as the second upper electrode layer 113-2a and the third upper electrode layer 113-3a.

[0435] The fourth lower electrode layer 113-4b may include a main electrode 113a and one or more sub-electrodes 113b protruding from the main electrode 113a. The fourth lower electrode layer 113-4b may further include a second connection pattern 112b. In addition to the main electrode 113a and one or more sub-electrodes 113b of the fourth lower electrode layer 113-4b and the second connection pattern 112b being disposed (or configured) at the second surface 111s2 of the fourth vibration layer 111-4, the main electrode 113a and one or more sub-electrodes 113b and the second connection pattern 112b of the fourth lower electrode layer 113-4b may be the same as those described above with reference to Figures 1 to 7 The fourth electrode layer 113-4 and the main electrode 113a and one or more sub-electrodes 113b of the second connection pattern 112b are substantially the same, so repeated description thereof is omitted. For example, the fourth lower electrode layer 113-4b may be substantially the same as the first lower electrode layer 113-1b, the second lower electrode layer 113-2b, and the third lower electrode layer 113-3b.

[0436] In the vibration device 100 or the vibration generating unit 110 according to the fourteenth embodiment of the present disclosure, each of the first to fourth vibration layers 111-1 to 111-4 may have the same polarization direction. For example, each of the first to fourth vibration layers 111-1 to 111-4 may have a polarization direction from the first surface 111a1 toward the second surface 111a2, but the embodiments of the present disclosure are not limited thereto. For example, each of the first to fourth vibration layers 111-1 to 111-4 may have a polarization direction from the second surface 111a2 toward the first surface 111a1.

[0437] In the vibration device 100 or the vibration generating portion 110 according to the fourteenth embodiment of the present disclosure, the first connecting member 118A may be configured to be electrically connected to the first group of electrode layers 113-1a, 113-2a, 113-3a, and 113-4a of each of the first electrode layer 113-1 to the fourth electrode layer 113-4. The first connecting member 118A may be formed (or disposed) at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113 and may be electrically (or commonly) connected (or bonded to or in contact with) the first sub-electrode 113b1 (or the first extension pattern 113e1) of the first to fourth upper electrode layers 113-1a, 113-2a, 113-3a, and 113-4a of each of the first electrode layer 113-1 to the fourth electrode layer 113-4.

[0438] In the vibration device 100 or the vibration generating portion 110 according to the fourteenth embodiment of the present disclosure, the second connection member 118B may be configured to be electrically connected to the second group of electrode layers 113-1b, 113-2b, 113-3b, and 113-4b of each of the first electrode layer 113-1 to the fourth electrode layer 113-4. The second connection member 118B may be formed (or provided) at one side surface (or one short side) of the vibration generating portion 110 or the electrode portion 113 so as to be electrically disconnected (or insulated) from the first connection member 118A, and the second connection member 118B may be electrically (or commonly) connected (or bonded to or in contact with) the second sub-electrode 113b2 (or second extension pattern 113e2) of the first lower electrode layer 113-1b, 113-2b, 113-3b, and 113-4b of each of the first electrode layer 113-1 to the fourth electrode layer 113-4.

[0439] The vibration device 100 or the vibration generating part 110 according to the fourteenth embodiment of the present disclosure may further include an adhesive member 117 .

[0440] The adhesive member 117 can be configured to electrically disconnect (or insulate) two electrode layers vertically adjacent to each other between two adjacent vibration layers among the vertically stacked plurality of vibration layers 111-1 to 111-4. The adhesive member 117 may include an adhesive material, an insulating adhesive material, or a non-conductive adhesive material. Therefore, the adhesive member 117 can enhance the adhesive force (or bonding force) between the upper electrode layers 113-1a to 113-4a and the lower electrode layers 113-1b to 113-4b vertically adjacent to each other among the first electrode layer 113-1 to the fourth electrode layer 113-4. For example, the adhesive member 117 can be an adhesive, an adhesive member, a bonding member, or an insulating member, but embodiments of the present disclosure are not limited thereto.

[0441] The adhesive member 117 according to an embodiment of the present disclosure may include first to third adhesive members 117 - 1 , 117 - 2 , and 117 - 3 .

[0442] The first adhesive member 117-1 may be disposed (or inserted) between the first lower electrode layer 113-1b of the first electrode layer 113-1 and the second upper electrode layer 113-2a of the second electrode layer 113-2, which are disposed between the first vibration layer 111-1 and the second vibration layer 111-2. The first adhesive member 117-1 may be configured to electrically disconnect (or insulate) the first lower electrode layer 113-1b from the second upper electrode layer 113-2a. Thus, the first electrode layer 113-1 or the first lower electrode layer 113-1b may be electrically disconnected (or insulated) from the second electrode layer 113-2 or the second upper electrode layer 113-2a via the first adhesive member 117-1.

[0443] The first adhesive member 117-1 according to an embodiment of the present disclosure may have the same shape and size as the first lower electrode layer 113-1b of the first electrode layer 113-1. For example, the first adhesive member 117-1 may include a first adhesive pattern 117a and one or more second adhesive patterns 117b.

[0444] In the first adhesive member 117-1, the first adhesive pattern 117a may have the same shape and size as the main electrode 113a of the second electrode layer 113-2. The first adhesive pattern 115a may be adhered (or inserted) between the main electrode 113a of the first lower electrode layer 113-1b and the main electrode 113a of the second upper electrode layer 113-2a. Therefore, the main electrode 113a of the first lower electrode layer 113-1b can be electrically disconnected (or insulated) from the main electrode 113a of the second upper electrode layer 113-2a by the first adhesive pattern 117a.

[0445] In the first adhesive member 117-1, one or more second adhesive patterns 117b may have the same shape and size as one or more sub-electrodes 113b of the first lower electrode layer 113-1b. The one or more second adhesive patterns 117b may be adhered (or inserted) between the one or more sub-electrodes 113b of the first lower electrode layer 113-1b and the one or more sub-electrodes 113b of the second upper electrode layer 113-2a. Therefore, the one or more sub-electrodes 113b of the first lower electrode layer 113-1b may be electrically disconnected (or insulated) from the one or more sub-electrodes 113b of the second upper electrode layer 113-2a by the one or more second adhesive patterns 117b.

[0446] According to another embodiment of the present disclosure, the first adhesive member 117-1 may have the same shape and size as the first vibration layer 111-1 or the second vibration layer 111-2. For example, the first adhesive member 117-1 may have a shape and size corresponding to the entire area between the second surface 111s2 of the first vibration layer 111-1 and the first surface 111s1 of the second vibration layer 111-2. Thus, the first adhesive member 117-1 may electrically disconnect (or insulate) the first lower electrode layer 113-1b (or the first electrode layer 113-1) from the second upper electrode layer 113-2a (or the second electrode layer 113-2).

[0447] The second adhesive member 117-2 may be disposed (or inserted) between the second lower electrode layer 113-2b of the second electrode layer 113-2, which is disposed between the second vibration layer 111-2 and the third vibration layer 111-3, and the third upper electrode layer 113-3a of the third electrode layer 113-3. The second adhesive member 117-2 may electrically disconnect (or insulate) the second lower electrode layer 113-2b from the third upper electrode layer 113-3a. Thus, the second electrode layer 113-2 or the second lower electrode layer 113-2b may be electrically disconnected (or insulated) from the third electrode layer 113-3 or the third upper electrode layer 113-3a via the second adhesive member 117-2.

[0448] Except that the second adhesive member 117-2 is configured to electrically disconnect (or insulate) the second lower electrode layer 113-2b and the third upper electrode layer 113-3a disposed between the second vibration layer 111-2 and the third vibration layer 111-3 from each other, the second adhesive member 117-2 may be the same or substantially the same as the first adhesive member 117-1, and thus a description thereof is omitted.

[0449] The third adhesive member 117-3 may be disposed (or interposed) between the third lower electrode layer 113-3b of the third electrode layer 113-3 and the fourth upper electrode layer 113-4a of the fourth electrode layer 113-4, which are disposed between the third vibration layer 111-3 and the fourth vibration layer 111-4. The third adhesive member 117-3 is configured to electrically disconnect (or insulate) the third lower electrode layer 113-3b from the fourth upper electrode layer 113-4a. Thus, the third electrode layer 113-3 or the third lower electrode layer 113-3b may be electrically disconnected (or insulated) from the fourth electrode layer 113-4 or the fourth upper electrode layer 113-4a via the third adhesive member 117-3.

[0450] The third adhesive member 117-3 may be the same or substantially the same as the first adhesive member 117-1, except that the third adhesive member 117-3 is configured to electrically disconnect (or insulate) the third lower electrode layer 113-3b and the fourth upper electrode layer 113-4a disposed between the third vibration layer 111-3 and the fourth vibration layer 111-4 from each other, and thus a description thereof is omitted.

[0451] Each of the first to third adhesive members 117-1, 117-2, and 117-3 according to an embodiment of the present disclosure may be configured as an adhesive material, an insulating adhesive material, or a non-conductive adhesive material. For example, each of the first to third adhesive members 117-1, 117-2, and 117-3 may include epoxy resin, acrylic resin, silicone resin, or polyurethane resin, but embodiments of the present disclosure are not limited thereto.

[0452] Each of the first to third adhesive members 117-1, 117-2 and 117-3 according to another embodiment of the present disclosure may include one or more of a thermosetting adhesive, a light-curing adhesive and a hot melt adhesive (or a hot bonding adhesive or a hot melt adhesive), a pressure-sensitive adhesive (PSA), an optically clear adhesive (OCA) or an optically clear resin (OCR), but the embodiments of the present disclosure are limited thereto. For example, each of the first to third adhesive members 117-1, 117-2 and 117-3 may include a hot melt adhesive. The hot melt adhesive may be a heat-activated type or a heat-curing type, but the embodiments of the present invention are not limited thereto. For example, the adhesive members 117-1, 117-2 and 117-3 including a hot melt adhesive may attach (or adhere) or bond two electrode layers vertically adjacent to each other by heat and pressure, and may electrically separate (or insulate) the two electrode layers vertically adjacent to each other.

[0453] The vibration device 100 according to the fourteenth embodiment of the present disclosure may have the same Figures 1 to 7 The vibration device 100 has the same effect as described above, and may further include an adhesive member 117, thereby enhancing the adhesive force (or bonding force) between two electrode layers vertically adjacent to each other.

[0454] Reference above Figures 42 to 45 The first electrode layer 113-1 to the fourth electrode layer 113-4 described above can be similarly applied (or added) to the Figures 8 to 37 The vibration device 100 of the second embodiment to the twelfth embodiment of the present disclosure is described, and therefore the description thereof is omitted. Figures 42 to 45 The pattern structure of each of the electrode layers 113-1 to 113-4 described above may be changed to Figures 8 to 37 The patterned structure of the electrode layer is described.

[0455] Figure 46 A vibration device according to another embodiment (fifteenth embodiment) of the present disclosure is illustrated. Figure 47 Illustrated according to an embodiment of the present disclosure Figure 46 The vibration generating section shown in . Figure 48 According to the embodiment of the present disclosure Figure 47 An exploded perspective view of the vibration unit and electrode unit shown in FIG. Figure 49 According to the embodiment of the present disclosure Figure 47 A cross-sectional view taken along line II' shown in FIG. Figure 50 According to the embodiment of the present disclosure Figure 47 A cross-sectional view taken along line J-J' shown in FIG. Figures 46 to 50 Illustrated by the above reference Figures 1 to 7The embodiment is realized by modifying the first connecting member and the second connecting member in the vibration device described above. Figures 1 to 7 In the description of the vibration device 100 described above, other descriptions besides the description of the first connecting member and the second connecting member may be included. Figures 46 to 50 In the description of the vibration device 100 shown in FIG, therefore, the same reference numerals denote the same elements and repeated descriptions thereof are omitted.

[0456] Reference Figures 46 to 50 The vibration device 100 or the vibration generating unit 110 according to the fifteenth embodiment of the present disclosure may further include a first connecting member 119A and a second connecting member 119B. For example, the first connecting member 119A may be a first hole contact member or a first hole connecting member, but the embodiments of the present disclosure are not limited thereto. The second connecting member 119B may be a second hole contact member or a second hole connecting member, but the embodiments of the present disclosure are not limited thereto.

[0457] The first connection member 119A may be configured to electrically connect the electrode layers 113-1, 113-3, and 113-5 of the first group 113G1 among the plurality of electrode layers 113-1 to 113-5 to each other using a hole contact type (or structure). The first connection member 119A may pass through (or through) the plurality of vibration layers 111-1 to 111-4 and may be electrically connected to the electrode layers 113-1, 113-3, and 113-5 of the first group 113G1 among the plurality of electrode layers 113-1 to 113-5. The first connection member 119A may pass through (or through) the plurality of vibration layers 111-1 to 111-4 and may be electrically connected to the electrode layers 113-1, 113-3, and 113-5 of the first group 113G1 and the electrode layers 113-2 and 113-4 of the second group 113G2 among the plurality of electrode layers 113-1 to 113-5.

[0458] The first connection member 119A may pass through (or through) each of the first to fourth vibration layers 111-1 to 111-4 and may be electrically connected to the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 among the plurality of electrode layers 113-1 to 113-5. For example, the first connection member 119A may pass through (or through) each of the first to fourth vibration layers 111-1 to 111-4 and may be electrically connected to the first extension pattern 113e1 of the first sub-electrode 113b1 of each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5. For example, the first connecting member 119A may pass through (or pass through) each of the first vibration layer 111-1 to the fourth vibration layer 111-4, may be electrically connected to the first extension pattern 113e1 of each of the first electrode layer 113-1, the third electrode layer 113-3 and the fifth electrode layer 113-5, and may be electrically (or commonly) connected to the second connecting pattern 112b of each of the second electrode layer 113-2 and the fourth electrode layer 113-4.

[0459] The second connection member 119B may be configured to electrically connect the electrode layers 113-2 and 113-4 of the second group 113G2 among the plurality of electrode layers 113-1 to 113-5 to each other using a hole contact type (or structure). The second connection member 119B may pass through (or through) the plurality of vibration layers 111-1 to 111-4 and may be electrically connected to the electrode layers 113-2 and 113-4 of the second group 113G2 among the plurality of electrode layers 113-1 to 113-5. The second connecting member 119B may pass through (or pass through) the plurality of vibration layers 111-1 to 111-4, and may be electrically (or commonly) connected to the first connecting pattern 112a among the plurality of electrode layers 113-1 to 113-5, the electrode layers 113-2 and 113-4 of the second group 113G2, and the third connecting pattern 112c of the electrode layers 113-1, 113-3, and 113-5 of the first group 113G1.

[0460] The second connection member 119B may pass through (or through) each of the first to fourth vibration layers 111-1 to 111-4 and may be electrically connected to the first connection pattern 112a and the second and fourth electrode layers 113-2 and 113-4 of the plurality of electrode layers 113-1 to 113-5. For example, the second connection member 119B may pass through (or through) each of the first to fourth vibration layers 111-1 to 111-4 and may be electrically connected to the second extension pattern 113e2 of the second sub-electrode 113b2 of each of the second and fourth electrode layers 113-2 and 113-4. For example, the second connecting member 119B may pass through (or pass through) each of the first vibration layer 111-1 to the fourth vibration layer 111-4, may be electrically connected to the second extension pattern 113e2 of each of the second electrode layer 113-2 and the fourth electrode layer 113-4, and may be electrically (or commonly) connected to the first connecting pattern 112a of the first electrode layer 113-1, and the third connecting pattern 112c of each of the third electrode layer 113-3 and the fifth electrode layer 113-5.

[0461] The vibration device 100 or the vibration generating part 110 according to the fifteenth embodiment of the present disclosure may include one or more first holes 110h1 and one or more second holes 110h2.

[0462] One or more first holes 110h1 may vertically penetrate the first to fourth vibration layers 111-1 to 111-4 to correspond to the first connection member 119A, and may be formed (or configured) to vertically penetrate the first sub-electrode 113b1 of each of the electrode layers 113-1, 113-3, and 113-5 of the first group 113G1 among the plurality of electrode layers 113-1 to 113-5. For example, the one or more first holes 110h1 may be formed (or configured) to vertically penetrate each of the first to fourth vibration layers 111-1 to 111-4, vertically penetrate the first extension pattern 113e1 of the first sub-electrode 113b1 of each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5, and vertically penetrate the second connection pattern 112b of each of the second electrode layer 113-2 and the fourth electrode layer 113-4. For example, the one or more first holes 110h1 may be a first via hole, a first through hole, or a first contact hole, but embodiments of the present disclosure are not limited thereto.

[0463] One or more second holes 110h2 may vertically penetrate the first to fourth vibration layers 111-1 to 111-4 to correspond to the second connection member 119B, and may be formed (or configured) to vertically penetrate the first sub-electrode 113b1 of each of the electrode layers 113-2 and 113-4 of the second group 113G2 among the plurality of electrode layers 113-1 to 113-5. For example, the one or more second holes 110h2 may be formed (or configured) to vertically penetrate each of the first to fourth vibration layers 111-1 to 111-4, vertically penetrate the second extension pattern 113e2 of the second sub-electrode 113b2 of each of the second electrode layer 113-2 and the fourth electrode layer 113-4, and vertically penetrate the first connection pattern 112a of the first electrode layer 113-1, and the third connection pattern 112c of each of the third electrode layer 113-3 and the fifth electrode layer 113-5. For example, the one or more second holes 110h2 may be a second via hole, a second through hole, or a second contact hole, but embodiments of the present disclosure are not limited thereto.

[0464] According to an embodiment of the present disclosure, the first connection member 119A may be filled in one or more first holes 110h1, and thus may be electrically (or commonly) connected to the first extension pattern 113e1 of the first sub-electrode 113b1 of each of the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5, and may be electrically (or commonly) connected to the second connection pattern 112b of each of the second electrode layer 113-2 and the fourth electrode layer 113-4. Therefore, the first electrode layer 113-1, the third electrode layer 113-3, and the fifth electrode layer 113-5 may commonly receive a driving signal (or sound signal or voice signal) provided from the signal providing member 190 via the first connection member 119A filled in the one or more first holes 110h1.

[0465] According to an embodiment of the present disclosure, the second connection member 119B may be filled in one or more second holes 110h2, and thus may be electrically (or commonly) connected to the second extension pattern 113e2 of the second sub-electrode 113b2 of each of the second electrode layer 113-2 and the fourth electrode layer 113-4, and may be electrically (or commonly) connected to the first connection pattern 112a of the first electrode layer 113-1, and the third connection pattern 112c of each of the third electrode layer 113-3 and the fifth electrode layer 113-5. Therefore, the second electrode layer 113-2 and the fourth electrode layer 113-4 may commonly receive a driving signal (or sound signal or voice signal) provided from the signal providing member 190 via the first connection member 119A filled in the one or more second holes 110h2.

[0466] Each of the first connecting member 119A and the second connecting member 119B according to an embodiment of the present disclosure may be configured as a conductive material or a conductive adhesive. For example, the conductive material of each of the first connecting member 119A and the second connecting member 119B may include a thermally cured electrode material, a light-cured (or ultraviolet (UV) cured) electrode material, or a solution-type electrode material, but the embodiments of the present disclosure are not limited thereto. For example, the electrode material of each of the first connecting member 119A and the second connecting member 119B may include silver (Ag), nickel (Ni), an Ag alloy, or a Ni alloy, but the embodiments of the present disclosure are not limited thereto. For example, each of the first connecting member 119A and the second connecting member 119B may be composed of silver (Ag) paste. For example, the conductive adhesive may include a conductive epoxy resin, a conductive acrylic resin, a conductive silicone resin, or a conductive polyurethane resin, but the embodiments of the present disclosure are not limited thereto.

[0467] The vibration device 100 according to the fifteenth embodiment of the present disclosure may have the same Figures 1 to 7 The same effect as described for the vibration device 100.

[0468] Reference above Figures 46 to 50 The first and second connection members 119A and 119B of the hole contact type described above can be similarly applied to the Figures 8 to 37 The vibration devices according to the second to eleventh embodiments of the present disclosure are described. For example, referring to Figures 8 to 37 The edge contact type first and second connecting members 118A and 118B described above may be changed to refer to Figures 46 to 50 The first and second connecting members 119A and 119B of the hole contact type are described. In this case, the above reference Figures 8 to 37 The described electrode layers 113 - 1 to 113 - 5 and the vibration layers 111 - 1 to 111 - 4 may further include one or more first and second holes corresponding to each of the first and second connection members 119A and 119B of a hole contact type, and thus a description thereof is omitted.

[0469] Reference above Figures 10 to 12 as well as Figures 35 to 37 The edge contact type third connection member 118C and the fourth connection member 118D described above may be changed to Figures 46 to 50 The first and second connecting members 119A and 119B of the hole contact type are described. In this case, the above reference Figures 10 to 12 as well as Figures 35 to 37The described electrode layers 113 - 1 to 113 - 5 and vibration layers 111 - 1 to 111 - 4 may further include one or more third holes and fourth holes corresponding to each of the first and second connection members 119A and 119B of a hole contact type, and thus a description thereof is omitted.

[0470] Reference above Figures 46 to 50 The first and second connection members 119A and 119B of the hole contact type described above can be similarly applied to the Figures 38 to 41 The vibration device according to the twelfth embodiment of the present disclosure is described. For example, the above reference Figures 38 to 41 The edge contact type first and second connecting members 118A and 118B described above may be changed to Figures 46 to 50 The first and second connecting members 119A and 119B of the hole contact type are described. In this case, the above reference Figures 38 to 41 The described electrode layers 113-1 to 113-4, vibration layers 111-1 to 111-4, and adhesive members 115 (or first to third adhesive members 115-1, 115-2, 115-3) may further include one or more first holes and second holes corresponding to each of the first connecting member 119A and the second connecting member 119B of the hole contact type, and thus a description thereof is omitted.

[0471] Reference above Figures 46 to 50 The first and second connection members 119A and 119B of the hole contact type described above can be similarly applied to the Figures 42 to 45 The vibration device according to the thirteenth embodiment of the present disclosure is described. For example, the above reference Figures 42 to 45 The edge contact type first and second connecting members 118A and 118B described above may be changed to Figures 46 to 50 The first and second connecting members 119A and 119B of the hole contact type are described. In this case, referring to Figures 42 to 45 The described electrode layers 113-1 to 113-4, vibration layers 111-1 to 111-4, and adhesive members 117 (or first to third adhesive members 117-1, 117-2, 117-3) may further include one or more first holes and second holes corresponding to each of the first connecting member 119A and the second connecting member 119B of the hole contact type, and thus a description thereof is omitted.

[0472] Figures 51A to 51I The diagram illustrates a main vibration region having a vibration mode shape according to a frequency-based driving signal in a vibration device according to an experimental example. The vibration device according to the experimental example may include: a vibration layer having a reference thickness and a reference size; and an upper electrode layer and a lower electrode layer having the same size as that of the vibration layer. Figures 51A to 51I In each of , the elliptical portion and / or the circular portion represents a concave or convex maximum vibration area (or displacement area). Figure 51A The main vibration region corresponding to the vibration mode shape based on the driving signal of 200 Hz is illustrated. Figure 51B A main vibration region corresponding to a vibration mode shape based on a driving signal of 470 Hz is illustrated. Figure 51C The main vibration region corresponding to the vibration mode shape based on the driving signal of 900 Hz is illustrated. Figure 51D The main vibration region corresponding to the vibration mode shape based on the driving signal of 1.3 kHz is illustrated. Figure 51E The main vibration area corresponding to the vibration mode shape based on the driving signal of 2 kHz is illustrated. Figure 51F The main vibration region corresponding to the vibration mode shape based on the driving signal of 2.9 kHz is illustrated. Figure 51G The main vibration region corresponding to the vibration mode shape based on the driving signal of 3.7 kHz is illustrated. Figure 51H The main vibration region corresponding to the vibration mode shape based on the driving signal of 4.6 kHz is illustrated. Figure 51I The main vibration region corresponding to the vibration mode shape based on the driving signal of 7.3 kHz is illustrated.

[0473] Reference Figures 51A to 51I In the vibration mode shape of the frequency-dependent driving signal of the vibration device 10 according to the experimental example, it can be seen that the main vibration region is based on the frequency of the driving signal. For example, it can be seen that the main vibration region of the frequency-dependent driving signal is located in the middle region MR of the vibration device 10. Therefore, the middle region MR of the vibration device 10 can be the main vibration region, and the other regions PA1 and PA2 of the vibration device 10 other than the middle region MR can be effective vibration regions.

[0474] In the case where the electrode layer of the vibration device 10 is patterned so as to be provided in the middle region MR of the vibration device 10, the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords can be enhanced. In the case where the electrode layer of the vibration device 10 is patterned so as to be additionally provided in the peripheral regions PA1 and PA2 adjacent to the middle region MR, the sound characteristics and sound pressure level characteristics of the high-pitched vocal cords can be additionally enhanced.

[0475] Therefore, as mentioned above Figures 1 to 37As described, the vibration device 100 according to the first to twelfth embodiments of the present disclosure may include an electrode layer, which is patterned into a main vibration area and an effective vibration area, or a main vibration area, corresponding to the vibration mode shape of the vibration device 10 according to the experimental example according to the frequency-based driving signal, thereby enhancing the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords, or enhancing the sound characteristics and sound pressure level characteristics of the low-pitched vocal cords and the high-pitched vocal cords.

[0476] Figure 52 An electronic device according to an embodiment of the present disclosure is illustrated. Figure 53 According to the embodiment of the present disclosure Figure 52 A cross-sectional view taken along line K-K' shown in FIG.

[0477] Reference Figure 52 and Figure 53 , an electronic device according to an embodiment of the present disclosure may include a passive vibration member 1100 and one or more vibration generating devices 1200 .

[0478] The “electronic device” according to an embodiment of the present disclosure may be applied to implement a display device, an audio device, a sound generating device, a sound bar, an analog signage or a digital signage, etc., but the embodiments of the present disclosure are not limited thereto.

[0479] The display device may include: a display panel including a plurality of pixels for realizing black / white or color images; and a driver for driving the display panel. For example, the display panel may be a liquid crystal display panel, an organic light emitting display panel, a light emitting diode display panel, an electrophoretic display panel, an electrowetting display panel, a micro light emitting diode display panel or a quantum dot light emitting display panel, etc., but the embodiments of the present disclosure are not limited thereto. For example, in an organic light emitting display panel, a pixel may include an organic light emitting device having an organic light emitting layer, etc., and the pixel may be a sub-pixel that realizes any one of the multiple colors constituting a color image. Therefore, the "electronic device" according to the embodiments of the present disclosure may include a unit electronic device or unit device (or unit device) as a complete product (or final product) including a display panel such as a liquid crystal display panel or an organic light emitting display panel, such as a laptop computer, a television (TV), a computer monitor, a device device including an automotive device or other types of devices for a vehicle, or a mobile electronic device such as a smart phone or an electronic board.

[0480] The simulated signage may be a billboard, poster, notice board, or the like. The simulated signage may include signage content such as a message, picture, or logo. The signage content may be provided on the passive vibration member 1100 of the device so that it is visible. For example, the signage content may be directly attached to the passive vibration member 1100, or the signage content may be printed on a medium such as paper, and the medium may be attached to the passive vibration member 1100.

[0481] The passive vibration member 1100 may vibrate based on the driving (or vibration) of the one or more vibration generating devices 1200. For example, the passive vibration member 1100 may generate one or more of vibration and sound based on the driving of the one or more vibration generating devices 1200.

[0482] The passive vibration member 1100 according to the embodiment of the present disclosure can be a display panel including a display unit (or screen) comprising a plurality of pixels that realize black / white or color images. Therefore, the passive vibration member 1100 can generate one or more of vibration and sound based on the drive of one or more vibration generating devices 1200. For example, the passive vibration member 1100 can generate or output a sound synchronized with the image in the display area based on the driving vibration of the vibration generating device 1200 while displaying an image on the display area. For example, the passive vibration member 1100 can be a vibrating 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 the embodiments of the present disclosure are not limited thereto.

[0483] According to another embodiment of the present disclosure, the passive vibration member 1100 may be a vibration plate, which includes a metal material or a non-metallic material or a composite non-metallic material having material properties suitable for being vibrated by one or more vibration generating devices 1200 to output sound. For example, the passive vibration member 1100 may include a vibration plate, which includes one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, rubber, carbon, and mirror. For example, the paper may be a cone paper for a speaker. For example, the cone paper may be pulp or foamed plastic, etc., but the embodiments of the present disclosure are not limited thereto.

[0484] According to another embodiment of the present disclosure, the passive vibration member 1100 may include a display panel including pixels displaying an image, or may include a non-display panel. For example, the passive vibration member 1100 may include one or more of the following: a display panel including pixels displaying an image; a screen panel on which an image is projected from a display device; a lighting panel; a signage panel; a vehicle interior material; a vehicle exterior material; a vehicle glass window; a vehicle seat interior material; a building ceiling material; a building exterior material; a building interior material; a building glass window; an aircraft interior material; an aircraft glass window; and a reflector, but the embodiments of the present disclosure are not limited thereto. For example, the non-display panel may be a light emitting diode lighting panel (or device), an organic light emitting lighting panel (or device), or an inorganic light emitting lighting panel (or device), but the embodiments of the present disclosure are not limited thereto.

[0485] The one or more vibration generating devices 1200 may be configured to vibrate the passive vibration member 1100. The one or more vibration generating devices 1200 may be configured to be connected to the rear surface 1000a of the passive vibration member 1100 via the support member 1140. Thus, the one or more vibration generating devices 1200 may vibrate the passive vibration member 1100, thereby generating or outputting one or more of vibration and sound based on the vibration of the passive vibration member 1100.

[0486] One or more vibration generating devices 1200 may include the above reference Figures 1 to 50 Thus, the above reference to one or more vibration devices described herein. Figures 1 to 50 The description of the vibration device may be included in Figure 52 and Figure 53 In the description of the vibration generating device 1200 shown in FIG, the same reference numerals denote the same elements, and repeated descriptions may be omitted.

[0487] The support member 1140 may be disposed between the vibration generating device 1200 and the passive vibration member 1100. The support member 1140 may be disposed between at least a portion of the vibration generating device 1200 and the passive vibration member 1100. For example, the support member 1140 may be a support portion, a transmission member, a vibration transmission member, a panel connection member, or a panel coupling member.

[0488] The supporting member 1140 according to an embodiment of the present disclosure may be connected between the passive vibration member 1100 and the central portion of the vibration generating device 1200 excluding the peripheral portion, but embodiments of the present disclosure are not limited thereto.

[0489] According to an embodiment of the present disclosure, the support member 1140 may be connected between the passive vibration member 1100 and the central portion of the vibration generating device 1200 based on a partial attachment scheme (or a partial bonding scheme). The central portion (or center portion) of the vibration generating device 1200 may be the center of vibration, so that the vibration of the vibration generating device 1200 can be effectively transmitted to the passive vibration member 1100 through (or via) the support member 1140. The peripheral portion of the vibration generating device 1200 may be separated from each of the support member 1140 and the passive vibration member 1100 and raised without being connected to the support member 1140 and / or the passive vibration member 1100. Therefore, during the bending vibration (or flexural vibration) of the vibration generating device 1200, the vibration of the peripheral portion of the vibration generating device 1200 can be prevented (or reduced) by the support member 1140 and / or the passive vibration member 1100, thereby increasing the vibration amplitude (or displacement amplitude) of the vibration generating device 1200. Therefore, the vibration amplitude (or displacement amplitude) of the passive vibration member 1100 based on the vibration of the vibration generating device 1200 can be increased, and thus, the sound characteristics and / or sound pressure level characteristics of the vocal cords including the low-pitched vocal cords generated based on the vibration of the passive vibration member 1100 can be further enhanced.

[0490] The support member 1140 according to another embodiment of the present disclosure may be connected between the passive vibration member 1100 and an edge portion (or peripheral portion) of the vibration generating device 1200 other than the central portion. For example, the support member 1140 may be connected between the passive vibration member 1100 and an edge portion (or peripheral portion) of the vibration generating device 1200 adjacent to a short side of the vibration generating device 1200.

[0491] The supporting member 1140 according to another embodiment of the present disclosure may be connected or attached to the entire front surface of each of the one or more vibration generating devices 1200 and the rear surface 1000a of the passive vibration member 1100 based on an all-surface attachment scheme (or an all-surface bonding scheme).

[0492] The support member 1140 according to an embodiment of the present disclosure may be configured to include a material having an adhesive layer with good adhesion or attachment to each of the one or more vibration generating devices 1200 and the rear surface of the display panel or the rear surface 1000a of the passive vibration member 1100. For example, the support member 1140 may include a foam pad, double-sided tape, double-sided foam tape or adhesive, etc., but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the support member 1140 may include epoxy resin, acrylic acid, silicone, or polyurethane, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the support member 1140 may include an acrylic material (or substance) having relatively good adhesion and a hardness higher than that of polyurethane. Therefore, the vibration of the one or more vibration generating devices 1200 can be effectively transmitted to the passive vibration member 1100.

[0493] According to another embodiment of the present disclosure, the support member 1140 may be omitted. For example, one or more vibration generating devices 1200 may be directly connected (or coupled) or adhered (or attached) to the rear surface 1000a of the passive vibration member 1100 without a separate intermediate member such as the support member 1140. In this case, the vibration device 100 constituting the vibration generating device 1200 may include Figure 6 and Figure 7 The vibration generating portion 110, the first adhesive layer 133, the second adhesive layer 135, and the first covering member 131 in the structure shown in FIG. For example, when one or more vibration generating devices 1200 are directly connected (or bonded) or adhered (or attached) to the rear surface 1000a of the passive vibration member 1100 without a separate intermediate member such as the support member 1140, Figure 6 and Figure 7 , the second covering member 137 is omitted from the vibration device 100 shown in FIG. Therefore, the vibration device 100 constituting the vibration generating device 1200 can be directly connected (or bonded) or adhered (or attached) to the rear surface 1000a of the passive vibration member 1100 via the second adhesive layer 135. For example, when the second adhesive layer 135 of the vibration device 100 includes a hot melt adhesive, the second adhesive layer 135 of the vibration device 100 constituting the vibration generating device 1200 can be connected (or bonded) or adhered (or attached) to the rear surface 1000a of the passive vibration member 1100 via a lamination process using one or more of heat and pressure.

[0494] The electronic device according to an embodiment of the present disclosure may further include a rear member 1300 and a coupling member 1350 .

[0495] The rear member 1300 may be disposed on the rear surface 1000a of the passive vibration member 1100. The rear member 1300 may be disposed on the rear surface 1000a of the passive vibration member 1100 to cover the one or more vibration generating devices 1200. The rear member 1300 may be disposed on the rear surface 1000a of the passive vibration member 1100 to cover the entire rear surface 1000a of the passive vibration member 1100 and the one or more vibration generating devices 1200. For example, the rear member 1300 may have the same dimensions as the passive vibration member 1100. For example, the rear member 1300 may cover the entire rear surface of the passive vibration member 1100 with a gap space GS and the one or more vibration generating devices 1200 therebetween. The gap space GS may be provided by a coupling member 1350 disposed between the passive vibration member 1100 and the rear member 1300 facing each other. The gap space GS may be referred to as an air gap, a receiving space, a vibration space, or a sound box, but embodiments of the present disclosure are not limited thereto.

[0496] The rear member 1300 may include any one of a glass material, a metal material, and a plastic material, but the embodiments of the present disclosure are not limited thereto. For example, the rear member 1300 may include a stacked structure in which one or more of a glass material, a plastic material, and a metal material are stacked, but the embodiments of the present disclosure are not limited thereto.

[0497] Each of the passive vibration member 1100 and the rear member 1300 may have a square shape or a rectangular shape, but embodiments of the present disclosure are not limited thereto. For example, each of the passive vibration member 1100 and the rear member 1300 may have a polygonal shape, a non-polygonal shape, a circular shape, or an elliptical shape. For example, when the electronic device according to an embodiment of the present disclosure is applied to an audio device or a sound bar, each of the passive vibration member 1100 and the rear member 1300 may have a rectangular shape in which the length of the long side is twice or more times that of the short side, but embodiments of the present disclosure are not limited thereto.

[0498] The coupling member 1350 may be configured to be connected between the rear peripheral portion of the passive vibration member 1100 and the front peripheral portion of the rear member 1300 , and thus a gap space GS may be provided between the passive vibration member 1100 and the rear member 1300 facing each other.

[0499] The coupling member 1350 according to an embodiment of the present disclosure may include an elastic material having adhesive properties and capable of compression and decompression. For example, the coupling member 1350 may include double-sided tape, single-sided tape, double-sided foam tape, or a double-sided adhesive foam pad, but embodiments of the present disclosure are not limited thereto. For example, the coupling member 1350 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 1350 may be formed from an elastomer.

[0500] According to another embodiment of the present disclosure, the rear member 1300 may further include a sidewall portion that supports the rear peripheral portion of the passive vibration member 1100. The sidewall portion of the rear member 1300 may protrude or curve from the front peripheral portion of the rear member 1300 toward the rear peripheral portion of the passive vibration member 1100, thereby providing a gap space GS between the passive vibration member 1100 and the rear member 1300. For example, the coupling member 1350 may be configured to connect between the sidewall portion of the rear member 1300 and the rear peripheral portion of the passive vibration member 1100. Therefore, the rear member 1300 may cover one or more vibration generating devices 1200 and support the rear surface 1000a of the passive vibration member 1100. For example, the rear member 1300 may cover one or more vibration generating devices 1200 and support the rear peripheral portion of the passive vibration member 1100.

[0501] According to another embodiment of the present disclosure, the passive vibration member 1100 may further include a sidewall portion connected to the front peripheral portion of the rear member 1300. The sidewall portion of the passive vibration member 1100 may protrude or curve from the rear peripheral portion of the passive vibration member 1100 toward the front peripheral portion of the rear member 1300, thereby providing a gap space GS between the passive vibration member 1100 and the rear member 1300. The sidewall portion can increase the rigidity of the passive vibration member 1100. For example, the coupling member 1350 can be configured to connect between the sidewall portion of the passive vibration member 1100 and the front peripheral portion of the rear member 1300. Therefore, the rear member 1300 can cover one or more vibration generating devices 1200 and support the rear surface 1000a of the passive vibration member 1100. For example, the rear member 1300 can cover one or more vibration generating devices 1200 and support the rear peripheral portion of the passive vibration member 1100.

[0502] The electronic device according to an embodiment of the present disclosure may further include one or more enclosures 1250 .

[0503] The enclosure 1250 can be connected or coupled to the rear peripheral portion of the passive vibration member 1100, thereby individually covering one or more vibration generating devices 1200. For example, the enclosure 1250 can be connected or coupled to the rear surface 1000a of the passive vibration member 1100 via an adhesive member 1251. The enclosure 1250 can be configured at the rear surface 1000a of the passive vibration member 1100 to cover or surround the one or more vibration generating devices 1200. For example, the enclosure 1250 can be a housing, an outer shell, a housing member, a housing member, a cabinet, a closure member, a closure cover, a closure box, or a speaker, but embodiments of the present disclosure are not limited thereto. The closure space can be an air gap, a vibration space, a sound space, or a speaker, but embodiments of the present disclosure are not limited thereto.

[0504] The enclosure 1250 may include one or more materials of a metal material and a non-metal material (or a composite non-metal material). For example, the enclosure 1250 may include one or more materials of metal, plastic, carbon, and wood, but the embodiments of the present disclosure are not limited thereto.

[0505] When the passive vibration member 1100 or the vibration generating device 1200 vibrates, the enclosure 1250 according to an embodiment of the present disclosure can maintain an impedance component based on air acting on the passive vibration member 1100. For example, the air surrounding the passive vibration member 1100 can resist the vibration of the passive vibration member 1100 and can function as an impedance component having a frequency-dependent reactance component and a resistance component. Therefore, the enclosure 1250 can form a closed space surrounding one or more vibration generating devices 1200 in the rear surface 1000a of the passive vibration member 1100. Thus, the enclosure 1250 can maintain an impedance component (either air impedance or elastic impedance) based on air acting on the passive vibration member 1100, thereby enhancing the sound characteristics and / or sound pressure level chara...

Claims

1. A vibration device, comprising: Vibration generating unit, The vibration generating unit comprises: multiple electrode layers; a plurality of vibration layers between the plurality of electrode layers, the plurality of vibration layers comprising piezoelectric material; a first connection member configured to be electrically connected to an electrode layer in a first group among the plurality of electrode layers; and a second connection member configured to be electrically connected to an electrode layer in a second group among the plurality of electrode layers, and Each of the plurality of electrode layers is configured to have a shape different from that of each of the plurality of vibration layers and a size smaller than that of each of the plurality of vibration layers.

2. The vibration device according to claim 1, wherein each of the plurality of vibration layers is configured to have a quadrilateral shape two-dimensionally, and Each of the plurality of electrode layers is configured to have a non-quadrilateral shape two-dimensionally. 3 . The vibration device of claim 1 , wherein the vibration generating part further comprises a first connection pattern disposed at an uppermost electrode layer among the plurality of electrode layers and electrically connected to the second connection member. 4 . The vibration device according to claim 1 , wherein each of the plurality of vibration layers is provided between two electrode layers vertically adjacent to each other among the plurality of electrode layers. 5 . The vibration device according to claim 4 , wherein the first connection member and the second connection member are provided on one side surface of the vibration generating part.

6. The vibration device according to claim 5, wherein each of the plurality of electrode layers includes a main electrode and a sub-electrode protruding from the main electrode, wherein the first connection member is electrically connected to a sub-electrode of an electrode layer in the first group, and The second connection member is electrically connected to the sub-electrodes of the electrode layer in the second group.

7. The vibration device according to claim 6, wherein the electrode layer in the second group further comprises a second connection pattern, the second connection pattern being electrically disconnected from the sub-electrode and electrically connected to the second connection member, and The electrode layer in the first group further includes a third connection pattern, the third connection pattern being electrically disconnected from the sub-electrode and electrically connected to the first connection member.

8. The vibration device according to claim 4, wherein the first connecting member passes through the plurality of vibration layers and is configured to be electrically connected to the electrode layers in the first group, and The second connection member passes through the plurality of vibration layers and is configured to be electrically connected to the electrode layers in the second group. 9 . The vibration device of claim 8 , wherein the vibration generating part further comprises a first connection pattern disposed at an uppermost electrode layer among the plurality of electrode layers and electrically connected to the second connection member.

10. The vibration device according to claim 9, wherein each of the plurality of electrode layers includes a main electrode and a sub-electrode protruding from the main electrode, The vibration generating unit further comprises: one or more first holes, the one or more first holes being configured to pass through the plurality of vibration layers and the sub-electrodes of the electrode layers in the first group; and one or more second holes, the one or more second holes being configured to pass through the plurality of vibration layers and the sub-electrodes of the electrode layers in the second group, wherein the first connection member is filled in the one or more first holes and is electrically connected to the electrode layers in the first group, and The second connection member is filled in the one or more second holes and is electrically connected to the electrode layers in the second group.

11. The vibration device according to claim 10, wherein the electrode layer in the second group further comprises a second connection pattern, the second connection pattern being electrically disconnected from the sub-electrode and electrically connected to the second connection member, wherein the electrode layer in the first group further comprises a third connection pattern, the third connection pattern being electrically disconnected from the sub-electrode and electrically connected to the first connection member, wherein the one or more first holes pass through the second connection pattern, and The one or more second holes pass through the third connection pattern.

12. The vibration device according to claim 1, wherein each of the plurality of electrode layers comprises: Main electrode; a sub-electrode protruding from the main electrode; and One or more patterned regions in a peripheral region of the sub-electrode. 13 . The vibration device of claim 12 , wherein each of the plurality of electrode layers further comprises a dummy pattern portion disposed at the one or more patterned regions.

14. The vibration device according to claim 13, wherein the dummy pattern portion further comprises: first to fourth dummy patterns corresponding to corners of the plurality of vibration layers; and The electrode connection lines are configured to be electrically connected to the first dummy pattern to the fourth dummy pattern. 15 . The vibration device according to claim 1 , further comprising a covering member configured to cover at least one of a first surface of the vibration generating portion and a second surface opposite to the first surface.

16. The vibration device according to claim 15, further comprising a signal providing member electrically connected to the vibration generating portion, Wherein the signal providing component comprises: a first signal line electrically connected to the first connection member; and A second signal line electrically connected to the second connection member. 17 . The vibration device according to claim 16 , wherein a portion of the signal providing member is accommodated between the cover member and the vibration generating portion.

18. An electronic device comprising: Passive vibrating components; as well as one or more vibration generating devices, the one or more vibration generating devices being configured to vibrate the passive vibration member, Wherein the one or more vibration generating devices include a vibration device according to any one of claims 1 to 17. 19 . The electronic device according to claim 18 , further comprising a surround provided on a rear surface of the passive vibration member and configured to cover the one or more vibration generating devices.

20. The electronic device according to claim 18, wherein the passive vibration member comprises one or more of the following: a vibration plate; a display panel comprising pixels configured to display an image; a screen panel wherein an image is projected from a display device; Light-emitting diode lighting panel; organic light-emitting lighting panel; inorganic light-emitting lighting panel; signage panel; Vehicle interior materials; Vehicle exterior materials; Vehicle glass windows; Vehicle seat interior materials; Vehicle ceiling materials; Building ceiling materials; building interior materials; building glazing; aircraft interior materials; aircraft glazing; and mirrors, and The vibration plate comprises one or more materials selected from metal, plastic, wood, paper, fiber, cloth, leather, glass, rubber, carbon and mirror.

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