Vibration device and sound device including same

Abstract

The invention relates to a vibration device and a sound device including the same. The vibration apparatus includes a vibration generating portion. The vibration generating portion includes a plurality of vibration portions each including a first surface and a second surface, the first surface including a first pattern portion and the second surface including a third pattern portion, the plurality of vibration portions being stacked on each other; a first connection member electrically connected to the first pattern portion of each of the plurality of vibration portions; and a second connection member electrically connected to the third pattern portion of each of the plurality of vibration portions.

Description

Technical Field

[0001] The present disclosure relates to a vibration device and a sound device including the same. Background Art

[0002] The device includes a separate speaker or sound device that provides sound. When the speaker is provided in the device, the speaker occupies space, thereby limiting the design and spatial arrangement of the device.

[0003] A speaker applied to a device may be, for example, an actuator including a magnet and a coil. However, when the actuator is applied to a device, its thickness becomes thick. Therefore, a piezoelectric device for achieving a thin thickness has received a lot of attention.

[0004] The description provided in this Background section should not be assumed to be prior art merely because it is mentioned in or related to the Background section.The Background section may include information that describes one or more aspects of the subject technology. Summary of the invention

[0005] A vibration device or a speaker having a piezoelectric device applied thereto may be driven or vibrated by a driving power or a driving signal supplied via a signal cable.

[0006] The vibration device (or membrane actuator) includes a membrane including wire and pad electrodes for applying driving power to the piezoelectric device. The vibration device requires a process of patterning the wire and pad electrodes on the membrane and a welding process of electrically connecting the pad electrodes to the signal cable, etc.

[0007] The inventors of the present disclosure have conducted extensive research and experiments to realize a vibration device that can simplify the manufacturing process and structure of the vibration device. Through extensive research and experiments, the inventors of the present disclosure have invented a vibration device with a new structure and a sound device including the same, wherein the manufacturing process and structure of the vibration device can be simplified.

[0008] One or more aspects of the present disclosure are directed to providing a vibration device and a sound device including the same that can simplify a manufacturing process and a structure of the vibration device.

[0009] One or more aspects of the present disclosure are directed to providing a vibration device and a sound device including the same that can reduce the manufacturing cost of the vibration device and can increase the process yield.

[0010] One or more aspects of the present disclosure are directed to providing a vibration device that can enhance sound pressure level characteristics of sound and a sound device including the same.

[0011] One or more aspects of the present disclosure are directed to providing a vibration device that can be connected to a signal supply member without a welding process and a sound device including the same.

[0012] One or more aspects of the present disclosure are directed to providing a vibration device having a signal supply member integrated therein and a sound device including the same.

[0013] Additional features, advantages and aspects will be described in the following description, and some of the contents will be obvious from the description, or can be learned by practicing the inventive concepts provided herein. Other features, advantages and aspects of the present disclosure can be realized and obtained by the structures specifically pointed out in the written description or derived therefrom, as well as the claims and the accompanying drawings.

[0014] 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 vibration portions, each of the plurality of vibration portions including a first surface and a second surface, the first surface including a first pattern portion, the second surface including a third pattern portion, the plurality of vibration portions being stacked on top of each other; a first connecting member electrically connected to the first pattern portion of each of the plurality of vibration portions; and a second connecting member electrically connected to the third pattern portion of each of the plurality of vibration portions.

[0015] In one or more aspects, a sound 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 include a vibration device. The vibration device may include a vibration generating portion, the vibration generating portion including: a plurality of vibration portions, each of the plurality of vibration portions including a first surface and a second surface, the first surface including a first pattern portion, the second surface including a third pattern portion, the plurality of vibration portions being stacked on top of each other; a first connecting member electrically connected to the first pattern portion of each of the plurality of vibration portions; and a second connecting member electrically connected to the third pattern portion of each of the plurality of vibration portions.

[0016] According to one or more embodiments of the present disclosure, the structure and manufacturing process of the vibration device may be simplified.

[0017] According to one or more embodiments of the present disclosure, the manufacturing cost of a vibration device may be reduced, and the process yield may be increased.

[0018] According to one or more embodiments of the present disclosure, the sound pressure level characteristics of sound may be enhanced.

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

[0020] According to one or more embodiments of the present disclosure, since the signal supply member and the vibration device are provided as one body, the signal supply member and the vibration device may be constructed as one component (or one element or one assembly).

[0021] According to one or more embodiments of the present disclosure, it is possible to prevent or reduce the vibration generating part from being cracked or damaged during a film lamination process.

[0022] Other systems, methods, features, and advantages will be or become apparent to those skilled in the art upon review of the following drawings and detailed description. All such additional systems, methods, features, and advantages are fully intended to be included in this specification, to be within the scope of the present disclosure, and to be protected by the appended claims. Nothing in this section should be construed as limiting these claims. Other aspects and advantages are discussed below in conjunction with various aspects of the present disclosure.

[0023] 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.

[0024] Note:

[0025] Note 1. A vibration device, comprising:

[0026] Vibration generating unit,

[0027] Wherein, the vibration generating unit comprises:

[0028] a plurality of vibration parts, each of the plurality of vibration parts including a first surface and a second surface, the first surface including a first pattern portion, the second surface including a third pattern portion, the plurality of vibration parts being stacked on top of each other;

[0029] a first connection member electrically connected to the first pattern portion of each of the plurality of vibration parts; and

[0030] A second connection member electrically connected to the third pattern portion of each of the plurality of vibration parts.

[0031] Note 2. A vibration device according to Note 1, wherein the first surface of each of the multiple vibration parts also includes a second pattern part having a shape different from that of the first pattern part, and the second surface of each of the multiple vibration parts also includes a fourth pattern part having a shape different from that of the third pattern part.

[0032] Note 3. The vibration device according to Note 2,

[0033] wherein the first connection member is electrically separated from the fourth pattern portion of each of the plurality of vibration parts, and

[0034] The second connection member is electrically separated from the second pattern portion of each of the plurality of vibration parts.

[0035] Supplement 4. The vibration device according to Supplement 2, wherein each of the plurality of vibration parts comprises:

[0036] a vibration layer, the vibration layer comprising a piezoelectric material;

[0037] a first electrode layer, the first electrode layer being located at a first surface of the vibration layer, the first electrode layer comprising the first pattern portion and the second pattern portion; and

[0038] A second electrode layer is provided at a second surface of the vibration layer opposite to the first surface, and the second electrode layer includes the third pattern portion and the fourth pattern portion.

[0039] Note 5. The vibration device according to Note 4,

[0040] wherein each of the side surface of the first electrode layer and the side surface of the second electrode layer is spaced apart from the side surface of the vibration layer,

[0041] wherein the first pattern portion and the second pattern portion are configured at one side surface of the first electrode layer, and

[0042] The third pattern portion and the fourth pattern portion are configured at one side surface of the second electrode layer.

[0043] Note 6. The vibration device according to Note 5,

[0044] wherein a distance between a side surface of the first electrode layer and a side surface of the vibration layer is greater than a thickness of the vibration layer or is two or more times the thickness of the vibration layer, and

[0045] The distance between the side surface of the second electrode layer and the side surface of the vibration layer is greater than the thickness of the vibration layer or is two times or more the thickness of the vibration layer.

[0046] Supplement 7. The vibration device according to Supplement 5,

[0047] wherein the first pattern portion protrudes from one side surface of the first electrode layer toward one side surface of the vibration layer, and

[0048] The second pattern portion is spaced apart from the first pattern portion and is configured to be recessed from one side surface of the first electrode layer.

[0049] Supplementary note 8. The vibration device according to Supplementary note 7, wherein an end side surface of the first pattern portion is aligned with the one side surface of the vibration layer.

[0050] Note 9. The vibration device according to Note 5,

[0051] wherein the third pattern portion protrudes from one side surface of the second electrode layer toward one side surface of the vibration layer to correspond to the first pattern portion, and

[0052] The fourth pattern portion is spaced apart from the third pattern portion, and is configured to be recessed from the one side surface of the second electrode layer to correspond to the second pattern portion.

[0053] Supplementary note 10. The vibration device according to Supplementary note 9, wherein an end side surface of the third pattern portion is aligned with the one side surface of the vibration layer.

[0054] Supplement 11. The vibration device according to Supplement 1, further comprising a first cover member and a second cover member,

[0055] Wherein, the vibration generating portion is provided between the first cover member and the second cover member.

[0056] Note 12. The vibration device according to Note 4,

[0057] wherein the first connection member is configured at one side surface of the vibration generating portion and connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the first pattern portion, and

[0058] wherein the second connection member is configured at one side surface of the vibration generating part, and is connected to one side surface of the vibration layer of each of the plurality of vibration parts and one side surface of the third pattern portion.

[0059] Supplement 13. The vibration device according to Supplement 12, further comprising a signal supply member electrically connected to the vibration generating portion,

[0060] Wherein, the signal supply component comprises:

[0061] a first signal line electrically connected to the first pattern portion and the first connection member; and

[0062] A second signal line electrically connected to the third pattern portion and the second connection member.

[0063] Supplement 14. The vibration device according to Supplement 13, further comprising a first cover member and a second cover member,

[0064] wherein the vibration generating portion is disposed between the first cover member and the second cover member, and

[0065] wherein a portion of the signal supply member is accommodated between the first cover member and the second cover member.

[0066] Note 15. The vibration device according to Note 14,

[0067] wherein the first signal line is provided between the first cover member and the vibration generating portion, and

[0068] The second signal line is provided between the second cover member and the vibration generating portion.

[0069] Supplementary note 16. The vibration device according to Supplementary note 15, further comprising a pad member, wherein the pad member is configured at the signal supply member.

[0070] Wherein, the signal supply component further includes a base film and an insulating film,

[0071] wherein the first signal line and the second signal line are provided between the base film and the insulating film,

[0072] wherein the pad member is disposed between the base film and the insulating film, and

[0073] wherein a portion of the cushion member is accommodated between the first cover member and the second cover member.

[0074] Note 17. The vibration device according to Note 4,

[0075] The first vibration part of the plurality of vibration parts further includes a connection pattern on the first surface of the vibration layer and electrically separated from the first electrode layer, and

[0076] Wherein, the connection pattern is electrically connected to the second connection member.

[0077] Note 18. The vibration device according to Note 17,

[0078] wherein each of the side surface of the first electrode layer and the side surface of the second electrode layer is spaced apart from the side surface of the vibration layer,

[0079] wherein the first pattern portion protrudes from one side surface of the first electrode layer toward one side surface of the vibration layer,

[0080] wherein the second pattern portion is spaced apart from the first pattern portion and is configured to be recessed from one side surface of the first electrode layer, and

[0081] The connection pattern is configured in the second pattern portion and extends toward one side surface of the vibration layer.

[0082] Supplementary note 19. The vibration device according to Supplementary note 18, wherein the connection pattern is configured in an island shape on the first surface of the vibration layer of the first vibration part and is aligned with the one side surface of the vibration layer.

[0083] Note 20. The vibration device according to Note 17,

[0084] wherein the third pattern portion protrudes from one side surface of the second electrode layer toward one side surface of the vibration layer to correspond to the first pattern portion, and

[0085] The fourth pattern portion is spaced apart from the third pattern portion, and is configured to be recessed from the one side surface of the second electrode layer to correspond to the second pattern portion.

[0086] Note 21. The vibration device according to Note 17,

[0087] wherein the first connection member is configured at one side surface of the vibration generating portion and connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the first pattern portion, and

[0088] The second connection member is configured at one side surface of the vibration generating part, connected to one side surface of the vibration layer of each of the plurality of vibration parts and one side surface of the third pattern portion, and connected to the connection pattern.

[0089] Supplement 22. The vibration device according to Supplement 21, further comprising a signal supply member electrically connected to the vibration generating portion,

[0090] Wherein, the signal supply component comprises:

[0091] a first signal line electrically connected to the first connection member; and

[0092] A second signal line is electrically connected to the second connection member.

[0093] Supplement 23. The vibration device according to Supplement 22, further comprising a first cover member and a second cover member,

[0094] wherein the vibration generating portion is disposed between the first cover member and the second cover member, and

[0095] wherein a portion of the signal supply member is accommodated between the first cover member and the second cover member.

[0096] Supplement 24. The vibration device according to Supplement 22, further comprising a first cover member and a second cover member,

[0097] wherein the vibration generating portion is disposed between the first cover member and the second cover member, and

[0098] The first signal line and the second signal line are provided between the first cover member and the vibration generating portion.

[0099] Note 25. The vibration device according to Note 2,

[0100] wherein the first connection member passes through the plurality of vibration parts and is electrically connected to the first pattern portion of each of the plurality of vibration parts, and

[0101] wherein the second connection member passes through the plurality of vibration parts and is electrically connected to the third pattern portion of each of the plurality of vibration parts.

[0102] Note 26. The vibration device according to Note 4,

[0103] wherein the first connecting member passes through the vibration layer of each of the plurality of vibration parts and a plurality of insulating members between the plurality of vibration parts, and is electrically connected to the first pattern portion of each of the plurality of vibration parts and overlaps with the fourth pattern portion of each of the plurality of vibration parts, and

[0104] The second connection member passes through the vibration layer of each of the plurality of vibration parts and the plurality of insulating members, and is electrically connected to the third pattern portion of each of the plurality of vibration parts and overlaps the second pattern portion of each of the plurality of vibration parts.

[0105] Note 27. The vibration device according to Note 26,

[0106] Wherein, each of the plurality of vibration parts comprises:

[0107] a first connection pattern disposed at a first surface of the vibration layer and electrically separated from the first electrode layer; and

[0108] a second connection pattern, the second connection pattern being disposed at the second surface of the vibration layer and being electrically separated from the second electrode layer,

[0109] wherein the first pattern portion includes a first hole configured at the first electrode layer,

[0110] wherein the second pattern portion includes a second hole configured at the first connection pattern,

[0111] wherein the third pattern portion includes a third hole constructed at the second electrode layer, and

[0112] Wherein, the fourth pattern portion includes a fourth hole configured at the second connection pattern.

[0113] Supplementary note 28. The vibration device according to Supplementary note 27, wherein the first connection member is electrically connected to the second connection pattern of each of the plurality of vibration parts, and

[0114] wherein the second connection member is electrically connected to the first connection pattern of each of the plurality of vibration parts.

[0115] Supplementary note 29. The vibration device according to Supplementary note 27, wherein each of the plurality of insulating members comprises:

[0116] a fifth pattern portion, the fifth pattern portion overlapping the first connection pattern; and

[0117] A sixth pattern portion overlaps the second connection pattern.

[0118] Note 30. The vibration device according to Note 27,

[0119] The vibration layers of the plurality of vibration parts have the same polarization direction, and

[0120] Each of the plurality of insulating members is disposed between two vibration parts vertically adjacent to each other among the plurality of vibration parts, and is disposed between the second electrode layer of the upper vibration part and the first electrode layer of the lower vibration part among the two vibration parts vertically adjacent to each other.

[0121] Note 31. The vibration device according to Note 27,

[0122] Wherein, some vibration layers of the plurality of vibration parts have different polarization directions,

[0123] wherein each of the plurality of insulating members is disposed between two vibration parts vertically adjacent to each other among the plurality of vibration parts,

[0124] Some of the plurality of insulating members are disposed between the second electrode layer of the upper vibration part and the second electrode layer of the lower vibration part of the two vibration parts vertically adjacent to each other, and

[0125] The other insulating members among the plurality of insulating members are disposed between the first electrode layer of the upper vibration part and the first electrode layer of the lower vibration part of the two vibration parts vertically adjacent to each other.

[0126] Note 32. The vibration device according to Note 27,

[0127] Wherein, the vibration layer of each of the plurality of vibration parts comprises:

[0128] a first through hole, the first through hole being between the first hole and the fourth hole; and

[0129] a second through hole, the second through hole being between the second hole and the third hole,

[0130] wherein the first connecting member is disposed at the first hole, the fourth hole, and the first through hole to pass through the vibration layers of the plurality of vibration parts and the plurality of insulating members, and

[0131] The second connection member is disposed at the second hole, the third hole, and the second through hole to pass through the vibration layers of the plurality of vibration parts and the plurality of insulating members.

[0132] Supplement 33. The vibration device according to Supplement 32, further comprising a signal supply member electrically connected to the vibration generating portion,

[0133] Wherein, the signal supply component comprises:

[0134] a first signal line electrically connected to the first connection member; and

[0135] A second signal line is electrically connected to the second connection member.

[0136] Supplement 34. The vibration device according to Supplement 33, further comprising a first cover member and a second cover member,

[0137] wherein the vibration generating portion is disposed between the first cover member and the second cover member, and

[0138] wherein a portion of the signal supply member is accommodated between the first cover member and the second cover member.

[0139] Supplement 35. The vibration device according to Supplement 33, further comprising a first cover member and a second cover member,

[0140] wherein the vibration generating portion is disposed between the first cover member and the second cover member, and

[0141] The first signal line and the second signal line are provided between the first cover member and the vibration generating portion.

[0142] Note 36. A sound device, comprising:

[0143] a passive vibrating member; and

[0144] one or more vibration generating devices configured to vibrate the passive vibration member,

[0145] Wherein, the one or more vibration generating devices include a vibration device according to any one of Notes 1 to 35.

[0146] Supplementary note 37. The sound device according to Supplementary note 36, further comprising a housing, the housing being disposed at a rear surface of the passive vibration member and being configured to cover the one or more vibration generating devices.

[0147] Note 38. The sound device according to Note 36,

[0148] Wherein, the passive vibration component includes one or more of a vibration plate, a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display device, a light-emitting diode lighting panel, an organic light-emitting lighting panel, an inorganic light-emitting lighting panel, a sign panel, a vehicle interior material, a vehicle exterior material, a vehicle glass window, a vehicle seat interior material, a vehicle ceiling material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window and a mirror, and

[0149] Wherein, the vibration plate comprises one or more materials selected from the group consisting of metal, plastic, wood, paper, fiber, fabric, leather, glass, rubber, carbon and mirror.

[0150] Note 39. The sound device according to Note 36, further comprising a shell, the shell being connected to the rear surface of the passive vibration member to form a closed space covering the one or more vibration generating devices.

[0151] Supplement 40. The sound device according to Supplement 39, further comprising a rear member, the rear member being disposed at the rear surface of the passive vibration member to cover the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0152] The accompanying drawings are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate various aspects and embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0153] Figure 1 A vibration device according to an example embodiment of the present disclosure is illustrated.

[0154] Figure 2 The present invention illustrates an exemplary embodiment of the present invention. Figure 1 The vibration generating unit shown.

[0155] Figure 3 According to an example embodiment of the present disclosure Figure 2 An exploded perspective view of the vibration generating unit shown.

[0156] Figure 4 is an example embodiment according to the present disclosure. Figure 2 and Figure 3 An exploded perspective view of the vibration unit shown in FIG.

[0157] Figure 5 According to an exemplary embodiment of the present disclosure, Figure 2 A cross-sectional view taken along line AA′ shown in FIG.

[0158] Figure 6 According to an exemplary embodiment of the present disclosure, Figure 2 A cross-sectional view extracted along line BB′ shown in FIG.

[0159] Figure 7 According to an exemplary embodiment of the present disclosure, Figure 1 A cross-sectional view extracted along line CC′ shown in FIG.

[0160] Figure 8 According to an exemplary embodiment of the present disclosure, Figure 1 The cross-sectional view extracted along the line DD′ shown in FIG.

[0161] Fig. 9 A vibration device according to another example embodiment of the present disclosure is illustrated.

[0162] Fig.10 is a side view of an exemplary embodiment of the present disclosure along Fig. 9 A cross-sectional view of the cross-sectional surface extracted by line EE′ shown in FIG.

[0163] Fig.11 is an example embodiment according to the present disclosure. Fig. 9 and Fig.10 A perspective view of the pad member and the signal supply member shown in FIG.

[0164] Fig.12 A vibration device according to another example embodiment of the present disclosure is illustrated.

[0165] Fig.13 Another exemplary embodiment of the present disclosure is illustrated. Fig.12 The vibration generating unit shown.

[0166] Fig.14 According to another exemplary embodiment of the present disclosure Fig.13 An exploded perspective view of the vibration generating unit shown.

[0167] Fig.15 Another exemplary embodiment of the present disclosure is illustrated. Fig.13 and 14 An exploded perspective view of the vibration unit shown in FIG.

[0168] Fig.16 According to another exemplary embodiment of the present disclosure, Fig.13 A cross-sectional view extracted along line FF′ shown in FIG.

[0169] Fig.17 According to another exemplary embodiment of the present disclosure, Fig.12 A cross-sectional view extracted along the line GG′ shown in FIG.

[0170] Fig.18 A vibration device according to another example embodiment of the present disclosure is illustrated.

[0171] Fig.19 Another exemplary embodiment of the present disclosure is illustrated. Fig.18 The vibration generating unit shown.

[0172] Fig. 20 According to another exemplary embodiment of the present disclosure Fig.19 An exploded perspective view of the vibration generating unit shown.

[0173] Fig.21 Another exemplary embodiment of the present disclosure is illustrated. Fig.19 and Fig. 20 An exploded perspective view of the vibration unit shown in FIG.

[0174] Fig. 22 According to another exemplary embodiment of the present disclosure, Fig.19 A cross-sectional view extracted along line HH′ shown in FIG.

[0175] Fig.23 According to another exemplary embodiment of the present disclosure, Fig.18 A cross-sectional view taken along line II′ shown in FIG.

[0176] Fig.24 According to another exemplary embodiment of the present disclosure Fig.19 Another exploded perspective view of the vibration generating unit shown.

[0177] Fig.25 Another exemplary embodiment of the present disclosure is illustrated. Fig.24 An exploded perspective view of the vibration unit shown in FIG.

[0178] Fig.26 According to another exemplary embodiment of the present disclosure, Fig.19 Another cross-sectional view taken along line HH′ shown in FIG.

[0179] Fig. 27 A sound device according to an example embodiment of the present disclosure is illustrated.

[0180] Fig.28 According to an exemplary embodiment of the present disclosure, Fig. 27 The cross-sectional view extracted by line JJ′ shown in FIG.

[0181] Fig.29 The sound output characteristics of the vibration device according to the exemplary embodiment of the present disclosure and the sound output characteristics of the vibration device according to the experimental example are illustrated.

[0182] 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 illustrations may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0183] Reference is now made in detail to various aspects of the present disclosure, examples of which may be illustrated in the accompanying drawings. In the following description, when a detailed description of known methods, functions, structures, or configurations may unnecessarily obscure aspects of the present disclosure, for the sake of brevity, a detailed description of these known functions or configurations may have been omitted or may be briefly provided. In addition, for the sake of brevity, repeated descriptions may be omitted or may be briefly provided. The described progression of processing steps and / or operations is a non-limiting example.

[0184] The order of steps and / or operations is not limited to the order described herein, and can be changed to occur in an order different from the order described herein, except for steps and / or operations that must occur in a specific order. In one or more examples, two operations in succession can be performed substantially simultaneously, or the two operations can be performed in reverse order or in a different order depending on the functions or operations involved.

[0185] Unless otherwise specified, the same reference numerals may also always represent the same elements, even when they are shown in different figures. Unless otherwise mentioned, the same reference numerals may refer to the same or substantially the same elements throughout the specification and the figures. In one or more aspects, unless otherwise specified, the same elements (or elements with the same names) in different figures may have the same or substantially the same functions and characteristics. The names of the various elements used in the following description are selected only for convenience and therefore may be different from the names used in the actual product.

[0186] By referring to the aspects described in the accompanying drawings, the advantages and features of the present disclosure and their implementation methods are explained. However, the present disclosure can be implemented in different forms and should not be interpreted as being limited to the example aspects set forth herein. On the contrary, these example aspects are only examples and are provided to enable the present disclosure to be thorough and complete, to help those skilled in the art understand the inventive concept, without limiting the scope of protection of the present disclosure.

[0187] The shapes, dimensions (e.g., size, length, width, height, thickness, position, radius, diameter, and area), proportions, ratios, angles, number of components, etc. disclosed herein (including those shown in the drawings) are only examples, and therefore, the present disclosure is not limited to the details shown. However, it should be noted that the relative dimensions of the components shown in the drawings are part of the present disclosure.

[0188] When terms such as "including", "having", "comprising", "containing", "consisting of", "made of", "formed of", "composed of", etc. are used for one or more elements (e.g., layers, films, regions, components, sections, members, parts, regions, areas, parts, steps, and / or operations, etc.), one or more other elements may be added unless terms such as "only" are used. The terms used in the present disclosure are only used to describe specific example aspects and are not intended to limit the scope of the present disclosure. Unless the context clearly indicates otherwise, terms in the singular may include plural forms.

[0189] Unless otherwise noted, the term "exemplary" is used to mean used as an example or illustration. An embodiment is an example embodiment. An aspect is an example aspect. In one or more implementations, "embodiment," "aspect," "example," etc. should not be interpreted as being superior or better than other implementations. Unless otherwise noted, aspects, examples, example aspects, etc. may refer to one or more aspects, one or more examples, one or more example aspects, etc. In addition, the term "may" encompasses all meanings of the term "can."

[0190] In one or more aspects, unless otherwise expressly stated, an element, feature, or corresponding information (e.g., level, range, size, dimension, etc.) is interpreted as including an error range or tolerance range, even if no explicit description of such error range or tolerance range is provided. The error range or tolerance range may be caused by various factors (e.g., process factors, internal or external impact, noise, etc.). When interpreting a numerical value, unless otherwise expressly stated, the numerical value is interpreted as including an error range.

[0191] When describing a positional relationship, for example, when using "on", "over", "top", "above", "below", "above", "below", "near", "close to", "adjacent", "near", "at or on the side" and the like to describe the positional relationship between two components (e.g., layers, films, regions, components, sections, etc.), one or more other components may be located between the two components, unless more restrictive terms such as "immediately", "directly" or "closely" are used. For example, when a structure is described as being located "on", "over", "top", "above", "below", "above", "below", "below", "near", "at or on the side" of another structure, or being "close to", "adjacent", "adjacent" or "close to" another structure, the description should be interpreted as including the situation where these structures are in contact with each other and the situation where one or more additional structures are disposed or interposed therebetween. In addition, the terms "front", "back", "back", "left", "right", "top", "bottom", "downward", "upward", "upper", "lower", "above", "below", "column", "row", "vertical", "horizontal" and the like refer to an arbitrary reference system.

[0192] Spatially relative terms such as "below," "below," "lower," "above," "upper," etc., may be used to describe the relationship between various elements (e.g., layers, films, regions, components, sections, etc.) as shown in the figures. Spatially relative terms should be understood to include terms for different orientations of elements in use or operation in addition to the orientations depicted in the drawings. For example, if the elements shown in the drawings are flipped, elements described as being "below" or "below" other elements will be oriented to be "above" the other elements. Therefore, the term "below" as an exemplary term may include all directions of "above" and "below." Similarly, the exemplary terms "above" or "up" may include both the directions of "above" and "below."

[0193] When describing a temporal relationship, when the temporal order is described as, for example, "after", "subsequently", "next", "before", "preceding", "preceding", etc., discontinuous or non-sequential situations may be included, such that one or more other events may occur in between, unless more restrictive terms such as "just", "immediately" or "directly" are used.

[0194] Terms such as "below," "lower," "above," "upper," etc. may be used herein to describe the relationship between elements as shown in the figures. It should be understood that these terms are spatially relative and based on the orientation depicted in the figures.

[0195] It should be understood that although the terms "first", "second", "A", "B", "(a)", "(b)", etc. can be used in this article to describe various elements (e.g., layers, films, regions, components, sections, members, parts, regions, areas, parts, steps, and / or operations, etc.), these elements should not be limited by these terms, for example, not limited to any specific order, sequence or quantity of elements. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, the first element can represent the second element, and similarly, the second element can represent the first element. In addition, without departing from the scope of the present disclosure, according to the convenience of those skilled in the art, the first element, the second element, etc. can be arbitrarily named. For the sake of brevity, the function or structure of these elements (e.g., the first element, the second element, etc.) is not limited by the serial number or name in front of the element. In addition, the first element may include one or more first elements. Similarly, the second element, etc. may include one or more second elements, etc.

[0196] When describing elements of the present disclosure, terms such as "first", "second", "A", "B", "(a)", "(b)", etc. may be used. These terms are intended to distinguish corresponding elements from other elements, and these terms are not used to limit the nature, basis, order or number of the elements.

[0197] When an element (for example, a layer, a film, a region, a component, a section, etc.) is described as being “connected,” “coupled,” “attached,” “bonded,” etc. to another element, unless otherwise specified, the element may not only be directly connected, coupled, attached or bonded, etc. to the other element, but may also be indirectly connected, coupled, attached or bonded, etc. to the other element with one or more intermediate elements disposed or interposed between the elements.

[0198] When an element (e.g., a layer, a film, a region, a component, a section, etc.) is “contacted”, “overlapped”, etc. with another element, unless otherwise specified, the element may not only be directly in contact with, overlapped, etc. with the other element, but may also be indirectly in contact with, overlapped, etc. with the other element with one or more intermediate elements disposed or interposed between the elements.

[0199] Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) is “provided”, “set”, “connected”, “coupled”, etc. to another element may be understood to mean that at least a portion of the element is “provided”, “set”, “connected”, “coupled”, etc. to at least a portion of another element, or the entire element is “provided”, “set”, “connected”, “coupled”, etc. to another element. Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) “contacts”, “overlaps”, etc. with another element may be understood to mean, for example, that at least a portion of the element contacts, overlaps, etc. with at least a portion of another element; that the entire element contacts, overlaps, etc. with at least a portion of another element; or that at least a portion of the element contacts, overlaps, etc. with all of another element.

[0200] Terms such as "line" or "direction" should not be interpreted based solely on the geometric relationship of the corresponding lines or directions being parallel or perpendicular to each other. These terms can represent a wider range of lines or directions in which the components of the present disclosure can functionally operate. For example, the terms "first direction", "second direction", etc. (such as directions parallel or perpendicular to the "x-axis", "y-axis", or "z-axis") should not be interpreted based solely on the geometric relationship of the corresponding directions being parallel or perpendicular to each other, but can be understood as directions with wider directionality within the range in which the components of the present disclosure can functionally operate.

[0201] The term "at least one" should be understood to include any and all combinations of one or more of the relevant listed items. For example, each of the phrases "at least one of the first item, the second item, or the third item" and "at least one of the first item, the second item, and the third item" may represent (i) a combination of items provided by one or more of the first item, the second item, and the third item, or (ii) only one of the first item, the second item, and the third item.

[0202] The expression of a first element, a second element, and "and / or" a third element should be understood to cover one of the first element, the second element, and the third element, and any and all combinations of the first element, the second element, and the third element. As an example, A, B, and / or C covers: only A; only B; only C; any one of A, B, and C (e.g., A, B, or C); some combinations of A, B, and C (e.g., A and B; A and C; or both B and C); and all of A, B, and C. In addition, the expression "A / B" may be understood as A and / or B. For example, the expression "A / B" may mean only A; only B; A or B; or A and B.

[0203] In one or more aspects, unless otherwise stated, the terms "between" and "among" may be used interchangeably for convenience only. For example, the expression "between a plurality of elements" may be understood as among a plurality of elements. In another example, "among a plurality of elements" may be understood as between a plurality of elements. In one or more examples, the number of elements may be two. In one or more examples, the number of elements may be more than two. In addition, when an element (e.g., a layer, a film, a region, a component, a section, etc.) is referred to as being "between" at least two elements, the element may be the only element between at least two elements, or one or more intermediate elements may also be present.

[0204] In one or more aspects, unless otherwise specified, the phrases "each other" and "mutually" may be used interchangeably for convenience only. For example, a statement "different from each other" may be understood to be different from each other. In another example, a statement "different from each other" may be understood to be different from each other. In one or more examples, the number of elements involved in the foregoing statements may be two. In one or more examples, the number of elements involved in the foregoing statements may be more than two.

[0205] In one or more aspects, unless otherwise stated, the phrases "one or more of" and "one or more of" may be used interchangeably for convenience only.

[0206] The term "or" means an inclusive or rather than an exclusive or. For example, unless otherwise specified or clear from the context, the statement "x employs a or b" means any of the natural inclusive permutations. For example, "a or b" can mean "a", "b", or "a and b". For example, "a, b or c" can mean "a", "b", "c", "a and b", "b and c", "a and c", or "a, b, and c".

[0207] The features of various aspects of the present disclosure may be partially or entirely connected or combined with each other, may be technically associated with each other, and may be operated, linked or driven together in various ways. Various aspects of the present disclosure may be implemented or implemented independently of each other, or may be implemented or implemented together in a mutually dependent or related relationship. In one or more aspects, the components of each device according to various aspects of the present disclosure may be operably connected and configured.

[0208] Unless otherwise defined, the terms (including technical terms and scientific terms) used in this article have the same meaning as those generally understood by ordinary technicians in the field to which the example aspects belong. It should also be understood that unless otherwise explicitly defined in this article, terms (for example, terms defined in commonly used dictionaries) should be interpreted as having, for example, the meaning consistent with its meaning in the context of the relevant field, and should not be interpreted in an idealized or overly formal sense.

[0209] The terms used herein have been selected to be commonly used in the relevant technical field; however, other terms may exist according to the development and / or change of technology, convention, preference of technicians, etc. Therefore, the terms used herein should not be understood as limiting the technical concept, but should be understood as examples of terms used to describe exemplary aspects.

[0210] In addition, in certain cases, the terms may be arbitrarily selected by the applicant, and in this case, their detailed meanings are described in this document. Therefore, the terms used in this document should be understood not only based on the names of the terms, but also based on the meanings of the terms and their contents.

[0211] The “X-axis direction”, “Y-axis direction”, and “Z-axis direction” should not be interpreted only by the geometric relationship of being perpendicular to each other, and may have wider directivities within the range in which the elements of the present disclosure can function.

[0212] In the following description, various exemplary aspects of the present disclosure are described in detail with reference to the accompanying drawings. With respect to the reference numerals of the elements of each of the accompanying drawings, the same elements may be shown in other drawings, and unless otherwise specified, the same reference numerals may refer to the same elements. The same or similar elements may be represented by the same reference numerals even if they are shown in different drawings.

[0213] In addition, for ease of description, the proportion, size, size and thickness of each element illustrated in the drawings may be different from the actual proportion, size, size and thickness. Therefore, aspects of the present disclosure are not limited to the proportion, size, size and thickness illustrated in the drawings.

[0214] Figure 1 A vibration device according to an embodiment of the present disclosure is illustrated. Figure 2 The embodiment according to the present disclosure is illustrated Figure 1 The vibration generating unit shown. Figure 3 According to the embodiments of the present disclosure Figure 2 An exploded perspective view of the vibration generating unit shown. Figure 4 According to the embodiments of the present disclosure Figure 2 and Figure 3 An exploded perspective view of the vibration unit shown in FIG. Figure 5 According to the embodiment of the present disclosure, Figure 2 A cross-sectional view taken along line AA′ shown in FIG. Figure 6 According to the embodiment of the present disclosure, Figure 2 A cross-sectional view extracted along line BB′ shown in FIG.

[0215] Reference Figures 1 to 3 For example, the vibration device 100 according to an embodiment of the present disclosure may include a vibration generating part 110 .

[0216] The vibration generating unit 110 may be configured to vibrate based on a drive signal (or a sound signal or a 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 rear surface, a back surface, a lowermost electrode layer, a lowermost electrode portion, or a lowermost electrode surface, but embodiments of the present disclosure are not limited thereto.

[0217] The vibration generating part 110 according to the embodiment of the present disclosure may include a plurality of (or two or more) vibration parts 110-1, 110-2, 110-3 and 110-4, a plurality of insulating members 117-1, 117-2, 117-3, a first connection member 118 and a second connection member 119. In the following description, the plurality of (or two or more) vibration parts may be referred to as a plurality of vibration parts.

[0218] Each of the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 may be configured to vibrate based on a drive signal (or a sound signal or a voice signal). Each of the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 may be a piezoelectric vibration part, a displacement part, a piezoelectric device or a vibration device, but the embodiments of the present disclosure are not limited thereto. The vibration device 100 according to the embodiments of the present disclosure may include a plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 overlapping each other. The vibration device 100 may include a plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 that are overlapped or stacked (or stacked) to shift in the same direction.

[0219] A plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 can overlap or stack to shift (or be driven) in the same direction. For example, a plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 can shrink or expand in the same driving direction (or displacement direction) based on the vibration drive signal in a state where a plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 are stacked or overlapped with each other, and therefore, the displacement (or bending force) or amplitude displacement can be increased or can be maximized. Therefore, a plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 can increase (or maximize) the displacement (or bending force) or amplitude displacement of the vibration generating part 110 or the vibration device 100, thereby enhancing the sound pressure level characteristics of the sound generated based on the vibration of the vibration generating part 110 or the vibration device 100 and the sound characteristics of the mid-low pitch vocal cords. For example, the mid-low pitch vocal range may be 200 Hz to 1 kHz, but the embodiments of the present disclosure are not limited thereto. For example, the high pitch vocal range may be above 1 kHz or above 3 kHz, but the embodiments of the present disclosure are not limited thereto.

[0220] Each of the plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 according to the embodiment of the present disclosure may include a vibration layer 111 , a first electrode layer 113 , and a second electrode layer 115 .

[0221] The vibration layer 111 may include a piezoelectric material (or an electroactive material) having a piezoelectric effect. For example, the piezoelectric material may have the following characteristics: when pressure is applied to the crystal structure or distortion (or bending) is applied by an external force, a potential difference is generated 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, the vibration layer 111 may be referred to as a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric material portion, an electroactive portion, a piezoelectric structure, a piezoelectric composite layer, a piezoelectric composite material, or a piezoelectric ceramic composite material, etc., but the embodiments of the present disclosure are not limited thereto.

[0222] The vibration layer 11 may be configured as a ceramic-based material capable of achieving relatively strong vibration, or may be configured as a piezoelectric ceramic having a perovskite-based crystal structure.

[0223] The piezoelectric ceramic may be configured as a single crystal ceramic having a crystal structure, or may be configured as a ceramic material having a polycrystalline structure or a polycrystalline ceramic. The piezoelectric material including the single crystal ceramic 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 the polycrystalline ceramic may include a lead zirconate titanate (PZT)-based material including lead (Pb), zirconium (Zr) and titanium (Ti), or may include a lead zirconate nickel niobate (PZNN)-based material including 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) that do not contain lead (Pb), but the embodiments of the present disclosure are not limited thereto.

[0224] The vibration layer 111 according to an embodiment of the present disclosure may include a piezoelectric sintered material (or piezoelectric ceramic) manufactured by sintering (or firing) a piezoelectric powder (or ceramic powder) at a high sintering (or firing) temperature of 1200° C. or higher, but the embodiment of the present disclosure is not limited thereto. For example, the piezoelectric sintered material may be manufactured by a high temperature sintering process performed on the piezoelectric powder.

[0225] Reference Figures 2 to 4 For example, the vibration layer 11 according to an embodiment of the present disclosure may include a first surface and a second surface opposite to the first surface. For example, the first surface of the vibration layer 111 may be an upper surface or a front surface. The second surface of the vibration layer 111 may be a lower surface, a back surface, or a rear surface.

[0226] The first electrode layer 113 may be constructed or coupled to the first surface of the vibration layer 111. The first electrode layer 113 may have the same size as the vibration layer 111, or may have a smaller size than the vibration layer 111. For example, the first electrode layer 113 of the uppermost vibration part 110-1 among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be an upper electrode layer, a front electrode layer, an uppermost surface electrode layer, or an uppermost electrode layer. In the following description, the uppermost vibration part 110-1 may be referred to as the first vibration part 110-1.

[0227] The second electrode layer 115 may be constructed or coupled to the second surface of the vibration layer 111. The second electrode layer 115 may have the same size as the vibration layer 111, or may have a smaller size than the vibration layer 111. For example, the second electrode layer 115 may have a different shape from the first electrode layer 113. For example, the second electrode layer 115 of the lowest vibration part 110-4 among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be a lower electrode layer, a rear electrode layer, a lowest surface electrode layer, or a lowest electrode layer. In the following description, the lowest vibration part 110-4 may be referred to as a fourth vibration part 110-4.

[0228] According to an embodiment of the present disclosure, in order to prevent or reduce an electrical short circuit between the first electrode layer 113 and the second electrode layer 115, each of the first electrode layer 113 and the second electrode layer 115 may be formed on other portions of the vibration layer 111 except the peripheral portion. For example, the first electrode layer 113 may be formed on the entire first surface of the vibration layer 111 except the peripheral portion. For example, the second electrode layer 115 may be formed on the entire second surface of the vibration layer 111 except the peripheral portion. For example, the side surface (or side wall) of the first electrode layer 113 may be spaced apart from the side surface (or side wall) of the vibration layer 111 to have predetermined distances D1 and D2. The side surface (or side wall) of the second electrode layer 115 may be spaced apart from the side surface (or side wall) of the vibration layer 111 to have predetermined distances D1 and D2.

[0229] Reference Figure 4 For example, the distances D1 and D2 between the side surface (or outer side wall) of the vibration layer 111 and the side surface (or outer side wall) of each of the first electrode layer 113 and the second electrode layer 115 may be adjusted based on the thickness of the vibration layer 111, or may be adjusted based on the thickness of the vibration layer 111 and the process error when forming the electrode layers 113 and 115. For example, the distances D1 and D2 between the side surface (or outer side wall) of the vibration layer 111 and the side surface (or outer side wall) of each of the first electrode layer 113 and the second electrode layer 115 may be greater than the thickness of the vibration layer 111, or two or more times the thickness of the vibration layer 111. For example, the distances D1 and D2 between the side surface (or outer side wall) of the vibration layer 111 and the side surface (or outer side wall) of each of the first electrode layer 113 and the second electrode layer 115 may be at least 0.4 mm or more. For example, distances D1 and D2 between a side surface (or outer side wall) of the vibration layer 111 and a side surface (or outer side wall) of each of the first and second electrode layers 113 and 115 may be at least 1 mm or more, but embodiments of the present disclosure are not limited thereto.

[0230] According to an embodiment of the present disclosure, each of the first electrode layer 113 and the second electrode layer 115 may include a first long side and a second long side parallel to each other, and a first short side and a second short side parallel to each other. For example, a first distance D1 between a side surface of the vibration layer 111 and a first short side of each of the first electrode layer 113 and the second electrode layer 115 may be greater than or equal to a second distance D2 between a side surface of the vibration layer 111 and each of the first long side, the second long side, and the second short side of each of the first electrode layer 113 and the second electrode layer 115. For example, the first distance D1 may be greater than the second distance D2. For example, the first distance D1 may be two or more times the second distance D2, but the embodiment of the present disclosure is not limited thereto. For example, in each of the first electrode layer 113 and the second electrode layer 115, the first short side and the second short side may be parallel to the first direction X, and the first long side and the second long side may be parallel to the second direction Y intersecting with the first direction X.

[0231] Reference Figures 2 to 4 According to an example of the present disclosure, one or more of the first electrode layer 113 and the second electrode layer 115 may include a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or semi-transparent conductive material of one or more of the first electrode layer 113 and the second electrode layer 115 may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the present disclosure is not limited thereto. The opaque conductive material of one or more of the first electrode layer 113 and the second electrode layer 115 may include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) including glass powder, etc., or may include an alloy thereof, but the present disclosure is not limited thereto. For example, carbon may be carbon black, Ketjen black, carbon nanotubes, and a carbon material including graphite, but the present disclosure is not limited thereto.

[0232] According to an embodiment of the present disclosure, in order to enhance the electrical characteristics and / or vibration characteristics of the vibration layer 111, each of the first electrode layer 113 and the second electrode layer 115 may include silver (Ag) having a low resistivity. In the first electrode layer 113 and the second electrode layer 115 including silver (Ag) containing glass powder, the content of the glass powder may be 1wt% to 12wt%, but the embodiment of the present disclosure is not limited thereto. The glass powder may include a PbO or Bi2O3-based material, but the embodiment of the present disclosure is not limited thereto.

[0233] According to an embodiment of the present disclosure, the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be polarized (or polarized (poled)) by a certain voltage applied to the first electrode layer 113 and the second electrode layer 115 in a certain temperature atmosphere or in a temperature atmosphere that can be changed from high temperature to room temperature, but the embodiment of the present disclosure is not limited thereto. For example, the vibration layer 111 may contract or expand alternately and repeatedly to vibrate based on the inverse piezoelectric effect according to a driving signal applied from the outside to the first electrode layer 113 and the second electrode layer 115. For example, the vibration layer 111 may vibrate based on vertical direction vibration and / or plane direction vibration according to the driving signal applied to the first electrode layer 113 and the second electrode layer 115. Therefore, the displacement amount of the vibration generating part 110 may be increased or improved by contraction and / or expansion in the plane direction of the vibration layer 111.

[0234] Reference Figures 2 to 4 , each of the plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 according to an embodiment of the present disclosure may include: a first surface 110 s 1 including a first pattern portion 113 a and a second pattern portion 113 b ; and a second surface 110 s 2 including a third pattern portion 115 a and a fourth pattern portion 115 b .

[0235] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the first pattern portion 113a and the second pattern portion 113b may be configured at one peripheral portion (or first peripheral portion) of the first surface 110s1 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The first pattern portion 113a and the second pattern portion 113b may be configured at the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to have different shapes or different structures. For example, in each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the first pattern portion 113a and the second pattern portion 113b may be configured at one side surface (or first short side) of the first electrode layer 113 to have different shapes or different structures.

[0236] In each of the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4, the first pattern portion 113a may protrude or extend from one side surface of the first electrode layer 113 to one side surface (or the first short side) of the vibration layer 111. The first pattern portion 113a may protrude or extend from one side surface of the first electrode layer 113 to one side surface of the vibration layer 111, thereby having a quadrilateral shape (or a rectangular shape). For example, the end side surface (or outer side wall) of the first pattern portion 113a may be aligned with one side surface of the vibration layer 111. Therefore, for the third direction Z which is the thickness direction of the vibration generating part 110, the first pattern portions 113a of the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 may overlap with each other. For example, the first pattern portion 113a may be a first protruding pattern, a first protruding portion, a first extending pattern, a first extending portion, a first contact pattern or a first contact pattern portion, but the embodiments of the present disclosure are not limited thereto. It should be noted that although Figures 1 to 6 The second pattern portion 113b and the fourth pattern portion 115b are shown, but the embodiments of the present disclosure are not limited thereto. For example, the second pattern portion 113b and the fourth pattern portion 115b may be omitted so that only the first pattern portion 113a and the third pattern portion 115a protrude from the electrode layer to be connected to the connection member, respectively.

[0237] According to an embodiment of the present disclosure, the first pattern portion 113a may protrude or extend from one side surface of the first electrode layer 113 to one side surface of the vibration layer 111 to have a first length L1 parallel to the first direction X and a first width W1 parallel to the second direction Y. For example, the first width W1 of the first pattern portion 113a may be equal to the first distance D1. For example, the first length L1 of the first pattern portion 113a may be greater than the third width W3 of the first connection member 118 parallel to the first direction X. For example, the first length L1 of the first pattern portion 113a may be twice or more the third width W3 of the first connection member 118, but the embodiments of the present disclosure are not limited thereto.

[0238] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the second pattern portion 113b may be spaced apart from the first pattern portion 113a, and may be configured (or formed) to be recessed from one side surface of the first electrode layer 113. The second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113 to have a quadrilateral shape (or a rectangular shape). One side surface of the first electrode layer 113 may be removed in a quadrilateral shape (or a rectangular shape), and thus, the second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113. Therefore, with respect to the third direction Z which is the thickness direction of the vibration generating part 110, the second pattern portions 113b of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the second pattern portion 113b may be a first concave pattern, a first concave portion, a first recessed pattern, a first groove pattern, a first groove pattern portion, a first electrode removal portion, a first contact prevention pattern, or a first contact prevention pattern portion, but embodiments of the present disclosure are not limited thereto.

[0239] According to an embodiment of the present disclosure, the second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113 to have a second length L2 parallel to the first direction X and a second width W2 parallel to the second direction Y. For example, the second width W2 of the second pattern portion 113b may be greater than or equal to the first distance D1 or the first width W1. For example, the second width W2 of the second pattern portion 113b may be two or more times the first distance D1, or may be two or more times the first width W1, but the embodiment of the present disclosure is not limited thereto. For example, the second length L2 of the second pattern portion 113b may be greater than the fourth width W4 of the second connection member 119 parallel to the first direction X. For example, the second length L2 of the second pattern portion 113b may be greater, being two or more times the fourth width W4 of the second connection member 119, but the embodiment of the present disclosure is not limited thereto. For example, the second length L2 of the second pattern portion 113b may be equal to the first length L1 of the first pattern portion 113a, but the embodiment of the present disclosure is not limited thereto.

[0240] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the third pattern portion 115a and the fourth pattern portion 115b may be configured at one peripheral portion (or first peripheral portion) of the second surface 110s2 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The third pattern portion 115a and the fourth pattern portion 115b may be configured at the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to have different shapes or different structures. For example, in each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the third pattern portion 115a and the fourth pattern portion 115b may be configured at one side surface (or first short side) of the second electrode layer 115 to have different shapes or different structures. For example, the third pattern portion 115a may have the same shape or structure as that of the first pattern portion 113a, and may correspond to or overlap with the second pattern portion 113b. For example, the fourth pattern portion 115b may have the same shape or structure as that of the second pattern portion 113b, and may correspond to or overlap with the first pattern portion 113a.

[0241] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the third pattern portion 115a may protrude or extend from one side surface of the second electrode layer 115 to one side surface (or the first short side) of the vibration layer 111. The third pattern portion 115a may protrude or extend from one side surface of the second electrode layer 115 to one side surface of the vibration layer 111 to have a quadrilateral shape (or a rectangular shape). For example, the end side surface (or outer side wall) of the third pattern portion 115a may be aligned with one side surface of the vibration layer 111. Therefore, for the third direction Z as the thickness direction of the vibration generating part 110, the third pattern portions 115a of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the third pattern portion 115a may be a second protruding pattern, a second protruding portion, a second extending pattern, a second extending portion, a second contact pattern, or a second contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0242] According to an embodiment of the present disclosure, the third pattern portion 115a may protrude or extend from one side surface of the second electrode layer 115 to one side surface of the vibration layer 111 to have a third length L3 parallel to the first direction X and a first width W1 parallel to the second direction Y. For example, the third length L3 of the third pattern portion 115a may be equal to the first length L1 of the first pattern portion 113a, but the embodiment of the present disclosure is not limited thereto. For example, the third length L3 of the third pattern portion 115a may be greater than the fourth width W4 of the second connection member 119, but the embodiment of the present disclosure is not limited thereto. For example, the third length L3 of the third pattern portion 115a may be twice or more the fourth width W4 of the second connection member 119, but the embodiment of the present disclosure is not limited thereto.

[0243] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the fourth pattern portion 115b may be spaced apart from the third pattern portion 115a, and may be configured (or formed) to be recessed from one side surface of the second electrode layer 115. The fourth pattern portion 115b may be configured (or formed) to be recessed from one side surface of the second electrode layer 115 to have a quadrilateral shape (or a rectangular shape). One side surface of the second electrode layer 115 may be removed in a quadrilateral shape (or a rectangular shape), and thus, the fourth pattern portion 115b may be configured (or formed) to be recessed from one side surface of the second electrode layer 115. Therefore, with respect to the third direction Z which is the thickness direction of the vibration generating part 110, the fourth pattern portions 115b of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the fourth pattern portion 115b may be a second concave pattern, a second concave portion, a second recessed pattern, a second groove pattern, a second groove pattern portion, a second electrode removal portion, a second contact prevention pattern, or a second contact prevention pattern portion, but embodiments of the present disclosure are not limited thereto.

[0244] According to an embodiment of the present disclosure, the fourth pattern portion 115b may be configured (or formed) to be recessed from one side surface of the second electrode layer 115 to have a fourth length L4 parallel to the first direction X and a second width W2 parallel to the second direction Y. For example, the fourth length L4 of the fourth pattern portion 115b may be equal to the second length L2 of the second pattern portion 113b, but the embodiment of the present disclosure is not limited thereto. For example, the fourth length L4 of the fourth pattern portion 115b may be greater than the third width W3 of the first connection member 118, but the embodiment of the present disclosure is not limited thereto. For example, the fourth length L4 of the fourth pattern portion 115b may be greater, being two or more times the third width W3 of the first connection member 118, but the embodiment of the present disclosure is not limited thereto. For example, the fourth length L4 of the fourth pattern portion 115b may be equal to the third length L3 of the third pattern portion 115a, but the embodiment of the present disclosure is not limited thereto.

[0245] According to an embodiment of the present disclosure, the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be formed to include a first pattern portion 113a and a second pattern portion 113b on the first surface 111a of the sintered vibration layer 111, and may be fired (or cured) by a firing process (or a curing process), but the embodiment of the present disclosure is not limited thereto. The second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be formed to include a third pattern portion 115a and a fourth pattern portion 115b on the second surface 111b of the sintered vibration layer 111, and may be fired (or cured) by a firing process (or a curing process), but the embodiment of the present disclosure is not limited thereto. The first electrode layer 113 and the second electrode layer 115 may be fired (or cured) by a firing temperature (or a curing temperature) of 650 degrees Celsius or less, but the embodiment of the present disclosure is not limited thereto. Therefore, the first electrode layer 113 and the second electrode layer 115 can be fired (or cured) by a relatively low firing temperature (or curing temperature), so that the first electrode layer 113 and the second electrode layer 115 can include a low-priced electrode material (or substance). For example, when the first electrode layer 113 and the second electrode layer 115 are constructed of a low-priced electrode material (or substance), the manufacturing cost of the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 or the vibration device 100 can be reduced.

[0246] Reference Figures 2 to 4In the example of, the plurality of insulating members 117-1, 117-2 and 117-3 may be configured to be electrically insulated (or separated or disconnected) from the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4. The plurality of insulating members 117-1, 117-2 and 117-3 may be disposed (or inserted) or adhered between the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4. For example, each of the plurality of insulating members 117-1, 117-2 and 117-3 may be disposed (or inserted) or adhered between the second electrode layer 115 of the upper vibration part and the first electrode layer 113 of the lower vibration part of two vibration parts vertically adjacent to each other among the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4.

[0247] According to an embodiment of the present disclosure, when the vibration device 100 or the vibration generating part 110 includes the first to fourth vibration parts 110-1, 110-2, 110-3 and 110-4 and the first to third insulating members 117-1, 117-2 and 117-3, the first insulating member 117-1 can be disposed (or inserted) or adhered between the second electrode layer 115 of the first vibration part 110-1 and the first electrode layer 113 of the second vibration part 110-2, the second insulating member 117-2 can be disposed (or inserted) or adhered between the second electrode layer 115 of the second vibration part 110-2 and the first electrode layer 113 of the third vibration part 110-3, and the third insulating member 117-3 can be disposed (or inserted) or adhered between the second electrode layer 115 of the third vibration part 110-3 and the first electrode layer 113 of the fourth vibration part 110-4.

[0248] A plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be vertically stacked by a plurality of insulating members 117-1, 117-2, and 117-3. A plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be configured to be stacked or overlapped with corresponding insulating members 117-1, 117-2, and 117-3 between them. For example, the insulating members 117-1, 117-2, and 117-3 may be inner insulating members, intermediate insulating members, intermediate bonding members, intermediate connecting members, or intermediate coupling members, but embodiments of the present disclosure are not limited thereto.

[0249] According to an embodiment of the present disclosure, each of the plurality of insulating members 117-1, 117-2, and 117-3 may be configured to surround the side surface (or outer side wall) of each of the second electrode layer 115 of the upper vibration part and the first electrode layer 113 of the lower vibration part of two vibration parts vertically adjacent to each other among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first insulating member 117-1 may be configured to cover or surround the other parts except the third pattern portion 115a of the second electrode layer 115 at the first vibration part 110-1 and the first pattern portion 113a of the first electrode layer 113 at the second vibration part 110-2. The second insulating member 117-2 may be configured to cover or surround the other parts except the third pattern portion 115a of the second electrode layer 115 at the second vibration part 110-2 and the first pattern portion 113a of the first electrode layer 113 at the third vibration part 110-3. The third insulating member 117 - 3 may be configured to cover or surround other portions except the third pattern portion 115 a of the second electrode layer 115 at the third vibration part 110 - 3 and the first pattern portion 113 a of the first electrode layer 113 at the fourth vibration part 110 - 4 .

[0250] Each of the plurality of insulating members 117-1, 117-2, and 117-3 may include an electrically insulating material having adhesive properties. Each of the plurality of insulating members 117-1, 117-2, and 117-3 may include an adhesive material having an electrically insulating property. For example, the plurality of insulating members 117-1, 117-2, and 117-3 may be configured as an adhesive material including an adhesive layer having good adhesive force or attachment force for each of the plurality of vertically stacked vibration parts 110-1, 110-2, 110-3, and 110-4.

[0251] According to an embodiment of the present disclosure, in order to completely electrically insulate (or isolate or separate) between the multiple vibration parts 110-1, 110-2, 110-3 and 110-4, each of the multiple insulating members 117-1 to 117-3 may include a material having a higher body resistance (or resistivity) than the body resistance (or resistivity) of the vibration layer 111.

[0252] Each of the plurality of insulating members 117-1, 117-2, and 117-3 according to an embodiment of the present disclosure may include a foam pad, a single-sided tape, a double-sided tape, a single-sided foam pad, a double-sided foam pad, a single-sided foam tape, a double-sided foam tape, an adhesive, an adhesive film, or a solution-type adhesive, etc., but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the plurality of insulating members 117-1, 117-2, and 117-3 may include an epoxy group, an acrylic group, a silicone group, or a polyurethane group, but the embodiments of the present disclosure are not limited thereto. The adhesive layer of each of the plurality of insulating members 117-1, 117-2, and 117-3 may include a polyurethane-based material (or substance) that is ductile relative to acrylic acid. Therefore, in the vibration device 100 or the vibration generating part 110 according to the embodiment of the present disclosure, the vibration loss caused by the displacement interference between the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can be minimized or reduced, or each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can be freely displaced.

[0253] According to another embodiment of the present disclosure, each of the plurality of insulating members 117-1, 117-2, and 117-3 may include one or more of the following: a thermosetting adhesive, a photocuring adhesive, a thermal bonding adhesive (or a hot melt adhesive or a thermosetting adhesive) and a PSA (pressure sensitive adhesive), an OCA (optically clear adhesive), and an OCR (optically clear resin), but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of insulating members 117-1, 117-2, and 117-3 may include a thermal bonding adhesive (or a hot melt adhesive). The thermal bonding adhesive may be a thermally active type or a thermosetting type. For example, the insulating members 117-1, 117-2, and 117-3 including a thermal bonding adhesive may be attached or coupled to two adjacent vibration parts 110-1, 110-2, 110-3, and 110-4 by heating and pressurizing. For example, the insulating members 117 - 1 , 117 - 2 , and 117 - 3 including the thermal bonding adhesive may minimize or reduce the vibration loss of the vibration device 100 or the vibration generating part 110 .

[0254] According to an embodiment of the present disclosure, a plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 according to another embodiment of the present disclosure may be integrated into one structure (or one component or one part) by a lamination process of a plurality of insulating members 117-1, 117-2, and 117-3. For example, a plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be integrated into one structure (or laminated piezoelectric element material or layered piezoelectric element material) by a lamination process performed by a roller, but the embodiments of the present disclosure are not limited thereto.

[0255] Reference Figure 2 , Figure 3 and Figure 5 In the example of, the first connection member 118 may be electrically connected to the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The first connection member 118 may be configured to be electrically insulated from the fourth pattern portion 115b of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first connection member 118 may be configured at one side surface (or outer side wall) of the vibration generating part 110, and may be electrically connected to one side surface (or outer side wall) of the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and one side surface (or first short side) of the vibration layer 111. The first connection member 118 may include a conductive material (or substance) to electrically connect the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to each other.

[0256] The first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be electrically or commonly connected to the corresponding first pattern portion 113a via (or through) the first connection member 118. Therefore, the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may commonly receive the same drive signal (or sound signal or voice signal) via (or through) the first connection member 118. The first connection member 118 may be electrically isolated (or insulated) from the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first connection member 118 may be electrically isolated (or insulated) from the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 by the insulating members 117-1, 117-2, and 117-3.

[0257] Reference Figure 2 , Figure 3 and Figure 6For example, the second connection member 119 may be electrically connected to the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The second connection member 119 may be configured to be electrically isolated (or insulated) from the second pattern portion 113b of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 119 may be configured on one side surface (or outer side wall) of the vibration generating part 110 spaced apart from the first connection member 118, and may be electrically connected to one side surface (or outer side wall) of the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and one side surface (or first short side) of the vibration layer 111. The second connection member 119 may include a conductive material (or substance) to electrically connect the third pattern portions 115 a at the plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 to each other.

[0258] The second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be electrically or commonly connected to the corresponding third pattern portion 115a via (or through) the second connection member 119. Therefore, the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may commonly receive the same drive signal (or sound signal or voice signal) via (or through) the second connection member 119. The second connection member 119 may be electrically isolated (or insulated) from the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 119 may be electrically isolated (or insulated) from the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 by the insulating members 117-1, 117-2, and 117-3.

[0259] According to an embodiment of the present disclosure, each of the first connection member 118 and the second connection member 119 may include a thermosetting electrode material, a light-curing (or ultraviolet (UV) curing) electrode material, or a conductive adhesive. 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. For example, the first connection member 117 and the second connection member 119 may be a conductive single-sided tape, a conductive single-sided adhesive pad, a conductive single-sided buffer tape, a conductive double-sided tape, a conductive double-sided adhesive pad, or a conductive double-sided buffer tape, but the embodiments of the present disclosure are not limited thereto.

[0260] According to an embodiment of the present disclosure, the vibration layer 111 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can be polarized (or polarized) at the same time in a temperature environment where a certain temperature environment or a high temperature changes to room temperature by a voltage commonly applied to the first electrode layer 113 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 via a first connecting member 118 and a voltage commonly applied to the second electrode layer 115 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 via a second connecting member 119, but the embodiments of the present disclosure are not limited to this. The first electrode layer 113 and the second electrode layer 115 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can be spaced apart from a side surface (or outer side wall) of the vibration layer 111 by a first distance D1 and a second distance D2, so that during the polarization process (or polarization process), an electrical short circuit between the first electrode layer 113 and the second electrode layer 115 can be prevented or reduced.

[0261] Figure 7 According to the embodiment of the present disclosure, Figure 1 A cross-sectional view extracted along line CC′ shown in FIG. Figure 8 According to the embodiment of the present disclosure, Figure 1 The cross-sectional view extracted along the line DD′ shown in FIG.

[0262] Reference Figure 1 , Figure 7 and Figure 8 For example, the vibration device 100 according to the embodiment of the present disclosure may further include a first cover member 130 and a second cover member 150 .

[0263] The vibration generating part 110 may be disposed between the first cover member 130 and the second cover member 150. The first cover member 130 may be disposed at the first surface 110a of the vibration generating part 110. For example, the first cover member 130 may be configured to cover the first surface 110a of the vibration generating part 110. The first cover member 130 may be configured to cover the first vibration part 110-1 or the first electrode layer 113 of the first vibration part 110-1 among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first cover member 130 may be configured to have a much larger size than the vibration generating part 110 or the first surface 110a of the vibration generating part 110. Therefore, the first cover member 130 may protect the first surface 110a of the vibration generating part 110, or may protect the first electrode layer 113 of the first vibration part 110-1.

[0264] The second cover member 150 may be disposed at the second surface 110b of the vibration generating part 110. For example, the second cover member 150 may be configured to cover the second surface 110b of the vibration generating part 110. The second cover member 150 may be configured to cover the fourth vibration part 110-4 or the first electrode layer 113 of the fourth vibration part 110-4 among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second cover member 150 may be configured to have a much larger size than the vibration generating part 110 or the second surface 110b of the vibration generating part 110, or may be configured to have the same size as the first cover member 130. Therefore, the second cover member 150 may protect the second surface 110b of the vibration generating part 110, or may protect the second electrode layer 115 of the fourth vibration part 110-4.

[0265] Each of the first cover member 130 and the second cover member 150 according to an embodiment of the present disclosure may include one or more of the following materials: plastic, fiber, fabric, paper, leather, rubber, carbon, and wood, but the embodiments of the present disclosure are not limited thereto. For example, each of the first cover member 130 and the second cover member 150 may include the same material or different materials. For example, each of the first cover member 130 and the second cover member 150 may be a polyimide (PI) film, a polyethylene terephthalate (PET) film, or a polyethylene naphthalate (PEN) film, but the embodiments of the present disclosure are not limited thereto.

[0266] One or more of the first cover member 130 and the second cover member 150 according to an embodiment of the present disclosure may include an adhesive member. For example, one or more of the first cover member 130 and the second cover member 150 may include adhesive layers 141 and 142 coupled or attached to the vibration generating portion 110. For example, the adhesive layers 141 and 142 may include an electrically insulating material having adhesiveness and capable of being compressed and decompressed. For example, the first cover member 130 may include an adhesive layer 141 coupled or attached to the first surface 110a of the vibration generating portion 110 or the first electrode layer 113 of the first vibration portion 110-1.

[0267] The first cover member 130 may be connected to or coupled to the first surface 110a of the vibration generating part 110 or the first electrode layer 113 of the first vibration part 110-1 through the first adhesive layer 141. For example, the first cover member 130 may be connected to or coupled to the first surface 110a of the vibration generating part 110 or the first electrode layer 113 of the first vibration part 110-1 through a film lamination process using the first adhesive layer 141.

[0268] The second cover member 150 may be connected to or coupled to the second surface 110b of the vibration generating part 110 or the second electrode layer 115 of the fourth vibration part 110-4 through the second adhesive layer 142. For example, the second cover member 150 may be connected to or coupled to the second surface 110b of the vibration generating part 110 or the second electrode layer 115 of the fourth vibration part 110-4 through a film lamination process using the second adhesive layer 142.

[0269] The first adhesive layer 141 may be disposed or filled between the first cover member 130 and the first surface 110a of the vibration generating part 110. The second adhesive layer 142 may be disposed or filled between the second cover member 150 and the second surface 110b of the vibration generating part 110. Therefore, in the area between the first cover member 130 and the second cover member 150, the vibration generating part 110 may be surrounded by the first adhesive layer 141 and the second adhesive layer 142. For example, in the area between the first cover member 130 and the second cover member 150, the first adhesive layer 141 and the second adhesive layer 142 may be configured as one adhesive layer, and therefore, the vibration generating part 110 may be built-in or embedded between the first adhesive layer 141 and the second adhesive layer 142.

[0270] Each of the first adhesive layer 141 and the second adhesive layer 142 according to an 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 141 and the second adhesive layer 142 may include epoxy resin, acrylic resin, silicone resin or polyurethane resin, but the embodiments of the present disclosure are not limited thereto.

[0271] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8 For example, the vibration device 100 according to the embodiment of the present disclosure may further include a signal supply member 190 .

[0272] The signal supply member 190 may be configured to be electrically connected to the vibration generating part 110 at one side of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first connection member 118 and the second connection member 119 at one side of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first surface 110a and the second surface 110b of the vibration generating part 110 at one side of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first surface 110a and the second surface 110b of the vibration generating part 110 between the first cover member 130 and the second cover member 150. The signal supply member 190 may be configured to be electrically connected to the electrode layer at the first surface 110a of the vibration generating part 110 and the electrode layer at the second surface 110b of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first electrode layer 113 of the first vibration part 110 - 1 of the vibration generating part 110 and the second electrode layer 115 of the fourth vibration part 110 - 4 of the vibration generating part 110 .

[0273] A portion of the signal supply member 190 may be disposed in or inserted (or accommodated) in a portion between one peripheral portion of the first cover member 130 and one peripheral portion of the second cover member 150. One peripheral portion of the first cover member 130 and one peripheral portion of the second cover member 150 may accommodate a portion of the signal supply member 190, or may vertically cover a portion of the signal supply member 190. Therefore, the signal supply member 190 may be integrated with the vibration generating portion 110. For example, the vibration device 100 according to the first embodiment of the present disclosure may be a vibration device integrated with the signal supply member 190. A portion of the signal supply member 190 may be inserted (or accommodated) and fixed between the first cover member 130 and the second cover member 150, so that a contact defect between the vibration generating portion 110 and the signal supply member 190 caused by the movement of the signal supply member 190 may be prevented or reduced. For example, the signal supply member 190 may be 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.

[0274] The signal supply member 190 according to an embodiment of the present disclosure may include a base member (or base film) 191 and a plurality of signal lines 193 and 195. For example, the signal supply member 190 may include the base member 191, a first signal line 193, a second signal line 195, and an insulating film 197.

[0275] The base member 191 may include a transparent or opaque plastic material. For example, the base member 191 may be a flexible film, a base insulating film, or a base member. The base film 191 may have a certain width along a first direction X, and may extend longer along a second direction Y intersecting the first direction X.

[0276] Each of the first signal line 193 and the second signal line 195 (or a plurality of signal lines) may be disposed at the first surface of the base member 191 in parallel with the second direction Y, and may be spaced apart or electrically separated from each other along the first direction X. Each of the first signal line 193 and the second signal line 195 may be disposed at the first surface of the base member 191 in parallel with each other. For example, each of the first signal line 193 and the second signal line 195 may be implemented in a line shape by (or through) patterning a metal layer (or a conductive layer) formed or deposited at the first surface of the base member 191.

[0277] The insulating film 197 may be disposed at the first surface of the base member 191 to cover each of the first signal line 193 and the second signal line 195. Each of the first signal line 193 and the second signal line 195 (or a plurality of signal lines) may be disposed between the base member 191 and the insulating film 197. The insulating film 197 may be a protective film, a cover layer film, a cover film, or a cover insulating film, but embodiments of the present disclosure are not limited thereto.

[0278] The first signal line 193 may be provided between the first cover member 130 and the vibration generating part 110, and may be electrically connected to the first pattern portion 113a and the first connection member 118 at the first vibration portion 110-1 of the vibration generating part 110. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first surface 110a of the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first electrode layer 113 of the first vibration portion 110-1 in the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration portion 110-1 and the first pattern portion 113a. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration part 110-1, the first pattern portion 113a, and the upper surface of the first connection member 118. Therefore, a driving signal (or a first driving signal) provided from the vibration driving circuit may be provided to the first electrode layer 113 of the first vibration part 110-1 of the vibration generating part 110 via (or through) the first signal line 193, and may be provided in common to the first electrode layer 113 of each of the other vibration parts 110-1, 110-2, and 110-3 in the vibration generating part 110 via (or through) the first connection member 118. For example, an end portion (or one side) 193a of the first signal line 193 may be a first electrode connection portion or a first electrode contact portion.

[0279] The second signal line 195 may be provided between the second cover member 150 and the vibration generating part 110, and may be electrically connected to the third pattern portion 115a and the second connection member 119 at the fourth vibration portion 110-4 of the vibration generating part 110. An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the second surface 110b of the vibration generating part 110 between the second surface 110b of the vibration generating part 110 and the second cover member 150. An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the second electrode layer 115 of the fourth vibration portion 110-4 of the vibration generating part 110 between the second surface 110b of the vibration generating part 110 and the second cover member 150. An end portion (or one side) 195a of the second signal line 195 may be electrically connected to a portion of the second electrode layer 115 of the fourth vibration portion 110-4 and the third pattern portion 115a. The end portion (or one side) 195a of the second signal line 195 may be electrically connected to a portion of the second electrode layer 115 of the fourth vibration part 110-4, the third pattern portion 115a, and the upper surface of the second connection member 119. Therefore, the driving signal (or the second driving signal) provided from the vibration driving circuit may be provided to the second electrode layer 115 of the fourth vibration part 110-4 of the vibration generating part 110 via (or through) the second signal line 195, and may be provided to the second electrode layer 115 of each of the other vibration parts 110-1, 110-2, and 110-3 of the vibration generating part 110 in common via (or through) the second connection member 119. For example, the end portion (or one side) 195a of the second signal line 195 may be a second electrode connecting portion or a second electrode contacting portion.

[0280] According to another embodiment of the present disclosure, the end portion 193a of the first signal line 193 may not be covered by the insulating film 197 and may be supported by the extending portion 191a of the base film 191, but the embodiments of the present disclosure are not limited thereto. Figure 7 The extended portion 191a of the base film 191 shown by the dotted line. For example, the end portion 193a of the first signal line 193 may protrude or extend from the end portion of the base film 191 to have a certain length without being supported or covered by the base film 191 and the insulating film 197. Therefore, the end portion 193a of the first signal line 193 may be bent. For example, the end portion (or one side) 193a of the first signal line 193 not supported by the base film 191 and the insulating film 197 may 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 thereto.

[0281] According to another embodiment of the present disclosure, the end portion (or one side) 195a of the second signal line 195 may not be covered by the base film 191 and may be supported by the extension portion 197a of the insulating film 197, but the embodiments of the present disclosure are not limited thereto. Figure 7 The extended portion 197a of the insulating film 197 shown in the dotted line. For example, the end portion (or one side) 195a of the second signal line 195 may protrude or extend from the end portion (or one side) of the insulating film 197 to have a certain length without being supported or covered by the base film 191 and the insulating film 197. Therefore, the end portion (or one side) 195a of the second signal line 195 may be bent. For example, the end portion (or one side) 195a of the second signal line 195 not supported by the base film 191 and the insulating film 197 may be a second protruding line, a second protruding electrode, a second conductive protruding line, a second flexible protruding line, or a second flexible protruding electrode, but the embodiments of the present disclosure are not limited thereto.

[0282] Reference Figure 2 , Figure 7 and Figure 8 In the example of, a first driving signal commonly applied to the corresponding first electrode layer 113 via (or through) the first signal line 193 and the first connecting member 118 and a second driving signal commonly applied to the corresponding second electrode layer 115 via (or through) the second signal line 195 and the second connecting member 119, a plurality of vibration parts 110-1 to 110-4 constructed at the vibration generating part 110 can be shifted (or vibrated) in the same direction, and therefore, the vibration width (or displacement width) of the vibration generating part 110 can be maximized, thereby enhancing the sound pressure level.

[0283] The vibration device 100 according to the embodiment of the present disclosure may include a plurality of vibration parts 110-1 to 110-4 stacked or overlapped to shift in the same direction, thereby enhancing the sound pressure level characteristics of the sound generated based on the vibration of the vibration generating part 110 or the vibration device 100 and the sound characteristics of the mid-low pitch vocal cord. A welding process for the electrical connection between the vibration generating part 110 and the signal supply member 190 may not be required, and therefore, the manufacturing process and structure of the vibration device 100 may be simplified. A vibration device 100 in which a signal supply member 190 is integrated may be provided, and therefore, the signal supply member 190 and the vibration generating part 110 may be constructed as one component, thereby achieving a single material effect. Since the electrode layers 113 and 115 of each of the plurality of vibration parts 110-1 to 110-4 include low-priced electrode materials, the manufacturing cost of the vibration device 100 may be reduced, and the process yield may be increased.

[0284] Fig. 9 A vibration device according to another embodiment of the present disclosure is illustrated. Fig.10The embodiment of the present disclosure is viewed from the side. Fig. 9 A cross-sectional view of the cross-sectional surface extracted by line EE′ shown in FIG. Fig.11 The embodiment according to the present disclosure is illustrated Fig. 9 and Fig.10 A perspective view of the pad member and the signal supply member shown in FIG. Figures 9 to 11 Illustrated in Figures 1 to 8 The vibration device according to the embodiment of the present disclosure is additionally configured with a pad member. In the following description, therefore, only the pad member and related elements will be described, and other elements can be described by Figures 1 to 8 The same reference numerals are referenced, and a repeated description may be omitted or may be briefly provided.

[0285] Reference Figures 9 to 11 For example, the vibration device 100 according to another embodiment of the present disclosure may further include a pad member 180 .

[0286] The inventors of the present disclosure have recognized that cracks occur in the vibration generating part 110 in (during) a film lamination process of integrating the first adhesive layer 141, the second adhesive layer 142, the first cover member 130, the second cover member 150, and the first signal line 193 and the second signal line 195 of the signal supply member 190. The inventors of the present disclosure have recognized that in (or during) the film lamination process, a relatively large load is applied to the central portion of the vibration generating part 110 due to the thickness of the first adhesive layer 141, the thickness of the second adhesive layer 142, and the thickness of the vibration generating part 110 including the plurality of vibration parts 110-1 to 110-4 stacked vertically, and therefore, cracks occur in the vibration generating part 110 due to a positional difference in a contact area between the vibration generating part 110 and each of the first signal line 193 and the second signal line 195.

[0287] The pad member 180 may be configured to prevent or reduce damage or breakage of the vibration generating part 110 in (or during) the film lamination process or to minimize damage or breakage of the vibration generating part 110. For example, the pad member 180 may be formed to absorb or reduce a load applied to a central portion of the vibration generating part 110 in (or during) the film lamination process. For example, the pad member 180 may be a step height compensating member, a supporting member, an intermediate member, an intermediate member, or a buffering member, but embodiments of the present disclosure are not limited thereto.

[0288] The pad member 180 according to the embodiment of the present disclosure may be disposed (or configured) at the signal supply member 190 to be disposed (or accommodated) between the first cover member 130 and the second cover member 150. For example, at least a portion of the pad member 180 may be disposed between the first cover member 130 and the second cover member 150. For example, the pad member 180 may be disposed (or configured) at a portion of the signal supply member 190 disposed (or accommodated) between the first cover member 130 and the second cover member 150. For example, the pad member 180 may be disposed (or configured) at an end portion 190e of the signal supply member 190 disposed (or accommodated) between the first cover member 130 and the second cover member 150.

[0289] The pad member 180 according to an embodiment of the present disclosure may be disposed (or interposed) between the base film 191 and the insulating film 197 of the signal supply member 190. The pad member 180 may be disposed (or interposed) between an end portion (or one side) 191e of the base film 191 and an end portion (or one side) 197e of the insulating film 197.

[0290] According to an embodiment of the present disclosure, the end portion (or one side) 191e of the base film 191 and the end portion (or one side) 197e of the insulating film 197 may be arranged to be staggered, with the pad member 180 therebetween. For example, a partial region (or half region) of the end portion (or one side) 191e of the base film 191 including the first signal line 193 and the extension portion 191a may be arranged on the first surface (or upper surface) of the pad member 180. A partial region (or half region) of the end portion 197e of the insulating film 197 including the second signal line 195 and the extension portion 197a may be arranged on the second surface (or lower surface) of the pad member 180.

[0291] According to an embodiment of the present disclosure, other regions (or the other half regions) other than a local region (or a half region) of an end portion (or a side) 191e of the base film 191 may be removed from the base film 191, so that the first signal line 193 and the extension portion 191a of the base film 191 may be disposed on the first surface of the pad member 180. For example, other regions (or the other half regions) of the end portion (or a side) 191e of the base film 191 including the region overlapping with the second signal line 195 may be removed. For example, other regions (or the other half regions) other than a local region (or a half region) of an end portion (or a side) 197e of the insulating film 197 may be removed from the insulating film 197, so that the second signal line 195 and the extension portion 197a of the insulating film 197 may be disposed on the second surface of the pad member 180. For example, other regions (or the other half regions) of the end portion (or a side) 197e of the insulating film 197 including the region overlapping with the first signal line 193 may be removed.

[0292] According to an embodiment of the present disclosure, the pad member 180 may be configured to have a thickness corresponding to the thickness of the vibration generating part 110. For example, an end portion (or one side) 190e of the signal supplying member 190 in which the pad member 180 is disposed (or inserted) may have the same thickness as that of the vibration generating part 110.

[0293] According to an embodiment of the present disclosure, a portion of the pad member 180 or a portion of an end portion (or one side) 190e of the signal supply member 190 in which the pad member 180 is disposed (or inserted) therein may be disposed (or accommodated) between the first cover member 130 and the second cover member 150. The other portion of the pad member 180 or the other portion of the end portion (or one side) 190e of the signal supply member 190 in which the pad member 180 is disposed (or inserted) therein may be exposed to the outside.

[0294] The vibration device 100 according to another embodiment of the present disclosure may have the same Figures 1 to 8 The vibration device 100 may have the same effect as that of the example described in the example, and may further include a pad member 180, thereby preventing, reducing or minimizing damage or breakage of the vibration generating part 110 caused by the positional difference of the contact area between the vibration generating part 110 and each of the first signal line 193 and the second signal line 195 during the film lamination process.

[0295] Fig.12 A vibration device according to another embodiment of the present disclosure is illustrated. Fig.13 Another embodiment of the present disclosure is illustrated. Fig.12 The vibration generating unit shown. Fig.14 According to another embodiment of the present disclosure Fig.13 An exploded perspective view of the vibration generating unit shown. Fig.15 is an example of another embodiment according to the present disclosure Fig.13 and 14 An exploded perspective view of the vibration unit shown in FIG. Fig.16 According to another embodiment of the present disclosure, Fig.13 A cross-sectional view extracted along line FF′ shown in FIG. Fig.17 According to another embodiment of the present disclosure, Fig.12 A cross-sectional view extracted along the line GG′ shown in FIG. Figures 12 to 17 The embodiment according to the present disclosure is illustrated Figures 1 to 8 The vibration device shown is additionally configured with an embodiment of a connection pattern. Hereinafter, a vibration device 100 according to another embodiment of the present disclosure will be described with respect to elements different from the vibration device 100 according to the embodiment of the present disclosure.

[0296] Reference Figure 5 as well as Figures 12 to 15 For example, the vibration device 100 or the vibration generating part 110 according to another embodiment of the present disclosure may further include a connection pattern 112 .

[0297] The connection pattern 112 may be configured at the first surface 110 a of the vibration generating part 110 . The connection pattern 112 may be configured at the first surface 110 a of the vibration generating part 110 to be electrically connected to the second connection member 119 .

[0298] The connection pattern 112 may be located at the uppermost electrode layer of the vibration generating portion 110, and may be configured to be electrically disconnected (or separated or isolated) from the uppermost electrode layer. For example, the connection pattern 112 may be located at the first vibration portion 110-1 among the plurality of vibration portions 110-1, 110-2, 110-3, and 110-4 at the vibration generating portion 110. For example, the connection pattern 112 may be located at the first surface 111a of the vibration layer 111 at the first vibration portion 110-1, and may be configured to be electrically disconnected (or separated or isolated) from the first electrode layer 113.

[0299] The connection pattern 112 may be configured in (or within) the second pattern portion 113b at the first electrode layer 113 of the first vibration part 110-1. For example, the second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113 to have a second length L2 parallel to the first direction X and a fifth width W5 parallel to the second direction Y. For example, the fifth width W5 of the second pattern portion 113b may be three times or more of the first distance D1, or may be three times or more of the first width W1, but the embodiments of the present disclosure are not limited thereto. For example, the fifth width W5 of the second pattern portion 113b may be three times or more of the first distance D1, or may be three times or more of the first width W1 to ensure the size (or area) of the connection pattern 112, but the embodiments of the present disclosure are not limited thereto.

[0300] The connection pattern 112 according to an embodiment of the present disclosure may be configured as an island shape on the first surface 111a of the vibration layer 111 at the first vibration portion 110-1. The connection pattern 112 may be configured as an island shape in (or within) the second pattern portion 113b at the first electrode layer 113 of the first vibration portion 110-1. The connection pattern 112 may be configured (or disposed) in (or within) the second pattern portion 113b and may extend to one side surface of the vibration layer 111. For example, the end side surface (or outer side wall) of the connection pattern 112 may be aligned with one side surface of the vibration layer 111. For example, the connection pattern 112 may be a connection pattern portion, a third contact pattern, or a third contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0301] The connection pattern 112 according to the embodiment of the present disclosure may be configured (or formed) to have a quadrilateral shape (or rectangular shape) or a line shape, which has a sixth width W6 parallel to the first direction X and a length parallel to the second direction Y. For example, the sixth width W6 of the connection pattern 112 may be less than the second length L2 of the second pattern portion 113b to electrically isolate (or insulate) the connection pattern 112 from the first electrode layer 113, but the embodiment of the present disclosure is not limited thereto. The connection pattern 112 may be inserted (or accommodated) in the second pattern portion 113b and may protrude to one side of the second pattern portion 113b. Therefore, for the third direction Z as the thickness direction of the vibration generating portion 110, the connection pattern 112 may overlap with the third pattern portion 115a protruding from the second electrode layer 115 of each of the plurality of second vibration portions to the fourth vibration portion 110-2, 110-3 and 110-4.

[0302] Reference Figures 13 to 16 In the example of the embodiment of the present invention, the second connection member 119 may be configured to be electrically connected to the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and electrically connected to the connection pattern 112. For example, the second connection member 119 may be electrically isolated (or insulated) from the second pattern portion 113b of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 119 may be configured at a side surface (or outer side wall) spaced apart from the first connection member 118, electrically connected to a side surface (or first short side) of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and a side surface (or outer side wall) of the third pattern portion 115a, and electrically connected to a side surface (or outer side wall) of the connection pattern 112. Therefore, the third pattern portion 115 a and the connection pattern 112 of each of the plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 may be electrically connected to each other through the second connection member 119 .

[0303] Reference Fig.12 , Fig.13 and Fig.17 For example, the vibration device 100 according to another embodiment of the present disclosure may further include a signal supply member 190 .

[0304] The signal supply member 190 may be configured to be electrically connected to the vibration generating part 110 at one side of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first connection member 118 and the second connection member 119 at one side of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) on the first surface 110a of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) between the first cover member 130 and the first surface 110a of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) between the first cover member 130 and the electrode layer (or the uppermost electrode layer) of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the connection pattern 112 and the electrode layer (or the uppermost electrode layer) at the first surface 110a of the vibration generating part 110 between the first cover member 130 and the first surface 110a of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the connection pattern 112 and the first electrode layer (113) of the first vibration part 110-1 of the vibration generating part 110. In addition to the signal supply member 190 being electrically connected to the connection pattern 112 and the first electrode layer 113 of the first vibration part 110-1, the signal supply member 190 may be similar to the above reference. Figure 1 , Figure 7 and Figure 8 The signal supply member 190 described in the example is substantially the same as that in FIG. 1 , and thus, a repeated description thereof may be omitted or will be briefly given.

[0305] A portion of the signal supply member 190 may be disposed at a portion between a peripheral portion of the first cover member 130 and a peripheral portion of the second cover member 150 , or inserted (or accommodated) in a portion between a peripheral portion of the first cover member 130 and a peripheral portion of the second cover member 150 .

[0306] The signal supply member 190 may include a base member 191, a first signal line 193, a second signal line 195, and an insulating film 197. The signal supply member 190 may be similar to the above reference numerals except that the second signal line 195 is electrically connected to the connection pattern 112. Figure 1 , Figure 7 and Figure 8 The signal supply member 190 described in the example is substantially the same as that in FIG. 1 , and thus, a repeated description thereof may be omitted or will be briefly given.

[0307] Each of the end portions (or one side) 193a and 195a of the first signal line 193 and the second signal line 195 of the signal supply member 190 may be electrically connected to the vibration generating part 110 in the same direction. For example, each of the end portions (or one side) 193a and 195a of the first signal line 193 and the second signal line 195 of the signal supply member 190 may be electrically connected to the vibration generating part 110 and disposed to face the first surface 110a (or the uppermost electrode layer) of the vibration generating part 110. Therefore, the first signal line 193 and the second signal line 195 of the signal supply member 190 may be electrically connected to the vibration generating part 110 in the same direction, so that the structure and manufacturing process of the signal supply member 190 may be simplified.

[0308] An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first surface 110a of the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first electrode layer 113 of the first vibration part 110-1 of the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration part 110-1 and the first pattern portion 113a. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration part 110-1, the first pattern portion 113a, and the upper surface of the first connection member 118. Therefore, the driving signal (or first driving signal) provided from the vibration driving circuit can be provided to the first electrode layer 113 of the first vibration part 110-1 of the vibration generating part 110 via (or through) the first signal line 193, and can be commonly provided to the first electrode layer 113 of each of the other vibration parts 110-1, 110-2 and 110-3 of the vibration generating part 110 via (or through) the first connecting member 118.

[0309] An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the connection pattern 112 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the connection pattern 112 and the upper surface of the second connection member 119. Therefore, a driving signal (or a second driving signal) provided from the vibration driving circuit may be provided to the connection pattern 112 via (or through) the second signal line 195, and may be provided to the second electrode layer 115 of each of the other vibration parts 110-1, 110-2, 110-3, and 110-4 of the vibration generating part 110 in common via (or through) the connection pattern 112 and the second connection member 119.

[0310] The vibration device 100 according to another embodiment of the present disclosure may have the same Figures 1 to 8 The vibration device 100 has the same effect as described in the example, and may further include a connection pattern 112, so that the first signal line 193 and the second signal line 195 of the signal supply member 190 can be electrically connected to the vibration generating part 110 in the same direction, thereby simplifying the structure and manufacturing process of the signal supply member 190.

[0311] According to another embodiment of the vibration device 100 of the present disclosure, the first signal line 193 and the second signal line 195 of the signal supply member 190 can be arranged together between the first cover member 130 and the first surface 110a of the vibration generating part 110, thereby preventing or reducing damage or breakage of the vibration generating part 110 during the film lamination process.

[0312] Fig.18 A vibration device according to another embodiment of the present disclosure is illustrated. Fig.19 Another embodiment of the present disclosure is illustrated. Fig.18 The vibration generating unit shown. Fig. 20 According to another embodiment of the present disclosure Fig.19 An exploded perspective view of the vibration generating unit shown. Fig.21 is an example of another embodiment according to the present disclosure Fig.19 and Fig. 20 An exploded perspective view of the vibration unit shown in FIG. Fig. 22 According to another embodiment of the present disclosure, Fig.19 A cross-sectional view extracted along line HH′ shown in FIG. Fig.23 According to another embodiment of the present disclosure, Fig.18 A cross-sectional view taken along line II′ shown in FIG. Figures 18 to 23 The embodiment according to the present disclosure is modified. Figures 1 to 8 Hereinafter, a vibration device 100 according to another embodiment of the present disclosure will be described with respect to elements different from the vibration device 100 according to the embodiment of the present disclosure.

[0313] Reference Figures 18 to 21 For example, a vibration device 100 according to another embodiment of the present disclosure may include a vibration generating part 110 .

[0314] The vibration generating part 110 may include a plurality of stacked vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 , and a plurality of insulating members 117 - 1 , 117 - 2 , and 117 - 3 between the plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 .

[0315] Each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may include: a first surface 110s1 including a first pattern portion 113a and a second pattern portion 113b, and a second surface 110s2 including a third pattern portion 115a and a fourth pattern portion 115b. In addition to each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 including a first pattern portion 113a, a second pattern portion 113b, a third pattern portion 115a, and a fourth pattern portion 115b, the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be the same as those described above with reference to Figures 1 to 4 The plurality of vibration parts 110 - 1 , 110 - 2 , 110 - 3 , and 110 - 4 described in the example are substantially the same, and thus, a repeated description thereof may be omitted or will be briefly given.

[0316] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the first pattern portion 113a and the second pattern portion 113b may be configured at one peripheral portion (or first peripheral portion) of the first surface 110s1 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The first pattern portion 113a and the second pattern portion 113b may be configured at the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to have different shapes or different structures.

[0317] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the first pattern portion 113a may be configured at one side of the first electrode layer 113. The first pattern portion 113a may be configured at one side of the first electrode layer 113 adjacent to one side surface of the vibration layer 111. The first pattern portion 113a according to an embodiment of the present disclosure may include one or more first holes 113h configured to pass through (or penetrate) the first electrode layer 113 along a third direction Z parallel to the thickness direction of the vibration generating part 110. With respect to the third direction Z, one or more first holes 113h in the first pattern portion 113a configured in each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the first pattern portion 113a may be a first hole pattern portion, a first contact pattern, or a first contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0318] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the second pattern portion 113b may be spaced apart from the first pattern portion 113a, and may be configured (or formed) to be recessed from one side surface of the first electrode layer 113. The second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113 to have a quadrilateral shape (or a rectangular shape). One side surface of the first electrode layer 113 may be removed in a quadrilateral shape (or a rectangular shape), and thus, the second pattern portion 113b may be configured (or formed) to be recessed from one side surface of the first electrode layer 113. Therefore, with respect to the third direction Z, the second pattern portions 113b of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the second pattern portion 113b may be a first concave pattern, a first concave portion, a first recessed pattern, a first groove pattern, a first groove pattern portion, a first electrode removal portion, a first contact prevention pattern, or a first contact prevention pattern portion, but embodiments of the present disclosure are not limited thereto.

[0319] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the third pattern portion 115a and the fourth pattern portion 115b may be configured at one peripheral portion (or first peripheral portion) of the second surface 110s2 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The third pattern portion 115a and the fourth pattern portion 115b may be configured at the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to have different shapes or different structures. For example, the third pattern portion 115a may have the same shape or the same structure as the first pattern portion 113a, and may correspond to or overlap the second pattern portion 113b.

[0320] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the third pattern portion 115a may be configured on one side of the second electrode layer 115. The third pattern portion 115a may be configured on one side of the second electrode layer 115 adjacent to one side surface of the vibration layer 111. The third pattern portion 115a according to an embodiment of the present disclosure may include one or more second holes 115h configured to pass through (or penetrate) the second electrode layer 115 along a third direction Z. With respect to the third direction Z, one or more second holes 115h in the third pattern portion 115a configured in each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the third pattern portion 115a may be a second hole pattern portion, a second contact pattern, or a second contact pattern portion, but embodiments of the present disclosure are not limited thereto.

[0321] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the fourth pattern portion 115b may be spaced apart from the third pattern portion 115a, and may be configured (or formed) to be recessed from one side surface of the second electrode layer 115. The fourth pattern portion 115b may be configured (or formed) to be recessed from one side surface of the second electrode layer 115 to have a quadrilateral shape (or a rectangular shape). One side surface of the second electrode layer 115 may be removed in a quadrilateral shape (or a rectangular shape), and thus, the fourth pattern portion 115b may be configured (or formed) to be recessed from one side surface of the second electrode layer 115. Therefore, with respect to the third direction Z, the fourth pattern portions 115b of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the fourth pattern portion 115b may be a second concave pattern, a second concave portion, a second recessed pattern, a second groove pattern, a second groove pattern portion, a second electrode removal portion, a second contact prevention pattern, or a second contact prevention pattern portion, but embodiments of the present disclosure are not limited thereto.

[0322] Reference Figures 19 to 21 , the vibration device 100 or the vibration generating part 110 according to another embodiment of the present disclosure may further include a first connection pattern 114 and a second connection pattern 116 configured at each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may further include a first connection pattern 114 and a second connection pattern 116.

[0323] The first connection pattern 114 may be configured at the first surface 110s1 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The first connection pattern 114 may be configured at the first surface 110s1 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 to be electrically disconnected (or separated or isolated) from the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4.

[0324] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the first connection pattern 114 may be configured on the first surface 111a of the vibration layer 111 to be electrically disconnected (or separated or isolated) from the first electrode layer 113. The first connection pattern 114 may be configured in the second pattern portion 113b at the first electrode layer 113. For example, the first connection pattern 114 may be configured as an island shape in (or within) the second pattern portion 113b, but the embodiments of the present disclosure are not limited thereto. For example, the first connection pattern 114 may be configured (or formed) to have a quadrilateral shape (or rectangular shape) or a line shape in (or within) the second pattern portion 113b. With respect to the third direction Z, the first connection patterns 114 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the first connection pattern 114 may be a first connection pattern portion, a third contact pattern, or a third contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0325] The second pattern portion 113b or the first connection pattern 114 at each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may include one or more first through holes 114h. The one or more first through holes 114h may be configured to pass through (or penetrate) the first connection pattern 114 along the third direction Z. For example, the one or more first through holes 114h may be a third hole. For example, the second pattern portion 113b or the first connection pattern 114 including the one or more first through holes 114h may be a third hole pattern, a third hole pattern portion, a third contact pattern, or a third contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0326] The second connection pattern 116 may be configured at the second surface 110s2 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The second connection pattern 116 may be configured at the second surface 110s2 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 so as to be electrically disconnected (or separated or isolated) from the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4.

[0327] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, the second connection pattern 116 may be configured on the second surface 111b of the vibration layer 111 to be electrically disconnected (or separated or isolated) from the second electrode layer 115. The second connection pattern 116 may be configured in the fourth pattern portion 115b at the second electrode layer 115. For example, the second connection pattern 116 may be configured as an island shape in (or within) the fourth pattern portion 115b, but the embodiments of the present disclosure are not limited thereto. For example, the second connection pattern 116 may be configured (or formed) to have a quadrilateral shape (or rectangular shape) or a line shape in (or within) the fourth pattern portion 115b. With respect to the third direction Z, the second connection patterns 116 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may overlap with each other. For example, the second connection pattern 116 may be a second connection pattern portion, a fourth contact pattern, or a fourth contact pattern portion, but embodiments of the present disclosure are not limited thereto.

[0328] The fourth pattern portion 115b or the second connection pattern 116 at each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may include one or more second through holes 116h. The one or more second through holes 116h may be configured to pass through (or penetrate) the second connection pattern 116 along the third direction Z. For example, the one or more second through holes 116h may be a fourth hole. For example, the fourth pattern portion 115b or the second connection pattern 116 including the one or more second through holes 116h may be a fourth hole pattern, a fourth hole pattern portion, a fourth contact pattern, or a fourth contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0329] The vibration device 100 or the vibration generating part 110 according to another embodiment of the present disclosure may further include one or more first through holes 111v1 and one or more second through holes 111v2 configured at the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may further include one or more first through holes 111v1 and one or more second through holes 111v2 configured at the vibration layer 111.

[0330] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, one or more first through holes 111v1 may be configured at the vibration layer 111 between the one or more first holes 113h and the one or more second through holes (or fourth holes) 116h. The one or more first through holes 111v1 may be configured at the vibration layer 111 to overlap with the one or more first holes 113h and the one or more second through holes 116h. The one or more first through holes 111v1 may be configured to pass through (or penetrate) the vibration layer 111 along the third direction Z. Therefore, the one or more first holes 113h, the one or more second through holes 116h, and the one or more first through holes 111v1 may be connected (or communicated) to each other along the third direction Z.

[0331] In each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, one or more second through holes 111v2 may be configured at the vibration layer 111 between one or more second holes 115h and one or more first through holes (or third holes) 114h. One or more second through holes 111v2 may be configured at the vibration layer 111 to overlap with one or more second holes 115h and one or more first through holes 114h. One or more second through holes 111v2 may be configured to pass through (or penetrate) the vibration layer 111 along a third direction Z. Therefore, one or more second holes 115h, one or more first through holes 114h, and one or more second through holes 111v2 may be connected (or communicated) to each other along the third direction Z.

[0332] According to an embodiment of the present disclosure, the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may have the same polarization direction (or the same polarization direction). For example, the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may have a polarization direction (or polarization direction) from the first electrode layer 113 toward the second electrode layer 115. For example, the polarization direction (or polarization direction) of the vibration layer 111 at each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may be the same.

[0333] According to an embodiment of the present disclosure, each of the multiple insulating members 117-1, 117-2 and 117-3 can be arranged (or inserted) between two vibration parts vertically adjacent to each other among the multiple vibration parts 110-1, 110-2, 110-3 and 110-4, and can be arranged (or inserted) between the second electrode layer 115 of the upper vibration part and the first electrode layer 113 of the lower vibration part of two vibration parts vertically adjacent to each other among the multiple vibration parts 110-1, 110-2, 110-3 and 110-4. Therefore, when the vibration layer 111 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 has the same polarization direction (or the same polarization direction), each of the multiple insulating members 117-1, 117-2 and 117-3 can prevent or reduce the electrical connection (or short circuit) between the electrode layers 113 and 115 of two vibration parts vertically adjacent to each other among the multiple vibration parts 110-1, 110-2, 110-3 and 110-4.

[0334] According to an embodiment of the present disclosure, a first insulating member 117-1 among a plurality of insulating members 117-1, 117-2 and 117-3 may be disposed (or inserted) between a first vibration portion 110-1 and a second vibration portion 110-2 vertically adjacent to each other among a plurality of vibration portions 110-1, 110-2, 110-3 and 110-4, and may be disposed (or inserted) between a second electrode layer 115 of the first vibration portion 110-1 and a first electrode layer 113 of the second vibration portion 110-2. The second insulating member 117-2 among the multiple insulating members 117-1, 117-2 and 117-3 can be arranged (or inserted) between the second vibration part 110-2 and the third vibration part 110-3 that are vertically adjacent to each other among the multiple vibration parts 110-1, 110-2, 110-3 and 110-4, and can be arranged (or inserted) between the second electrode layer 115 of the second vibration part 110-2 and the first electrode layer 113 of the third vibration part 110-3. A third insulating member 117-3 among the plurality of insulating members 117-1, 117-2, and 117-3 may be disposed (or interposed) between a third vibration portion 110-3 and a fourth vibration portion 110-4 vertically adjacent to each other among the plurality of vibration portions 110-1, 110-2, 110-3, and 110-4, and may be disposed (or interposed) between a second electrode layer 115 of the third vibration portion 110-3 and a first electrode layer 113 of the fourth vibration portion 110-4.

[0335] Each of the plurality of insulation members 117 - 1 , 117 - 2 , and 117 - 3 according to an embodiment of the present disclosure may include a fifth pattern portion 117 a and a sixth pattern portion 117 b .

[0336] The fifth pattern portion 117a may be configured (or formed) to be recessed from one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3. The fifth pattern portion 117a may be configured to overlap with the first connection pattern 114 and have the same shape as the shape of the second pattern portion 113b. For example, one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3 may be removed in a quadrilateral shape, and therefore, the fifth pattern portion 117a may be configured to be recessed from one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3. Therefore, with respect to the third direction Z, the fifth pattern portion 117a of each of the plurality of insulating members 117-1, 117-2, and 117-3 may overlap each other. For example, the fifth pattern portion 117a may be a third concave pattern, a third concave portion, a third concave pattern, a third groove pattern, a third groove pattern portion, a first removal pattern, a first removal pattern portion, a first through pattern, a first through pattern portion, a third anti-contact pattern, or a third anti-contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0337] The sixth pattern portion 117b may be configured (or formed) to be recessed from one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3 to be spaced apart from the fifth pattern portion 117a. The sixth pattern portion 117b may be configured to overlap with the second connection pattern 116 and have the same shape as the fourth pattern portion 115b. For example, one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3 may be removed in a quadrilateral shape, and therefore, the sixth pattern portion 117b may be configured to be recessed from one side surface of the corresponding insulating member in the insulating members 117-1, 117-2, and 117-3. Therefore, with respect to the third direction Z, the sixth pattern portion 117b of each of the plurality of insulating members 117-1, 117-2, and 117-3 may overlap each other. For example, the sixth pattern portion 117b may be a fourth recessed pattern, a fourth recessed portion, a fourth recessed pattern, a fourth groove pattern, a fourth groove pattern portion, a second removal pattern, a second removal pattern portion, a second through pattern, a second through pattern portion, a fourth anti-contact pattern, or a fourth anti-contact pattern portion, but the embodiments of the present disclosure are not limited thereto.

[0338] Reference Fig.18 , Fig.19 and Fig. 22 For example, the vibration device 100 or the vibration generating part 110 according to another embodiment of the present disclosure may further include a first connection member 218 and a second connection member 219 .

[0339] The first connection member 218 may pass through (or penetrate) the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The first connection member 218 may pass through (or penetrate) the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and the plurality of insulating members 117-1, 117-2, and 117-3, and may be electrically connected to the first pattern portion 113a and the fourth pattern portion 115b (or the second connection pattern 116) of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first connection member 218 may pass through (or penetrate) the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first connection member 218 may be commonly connected to the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the first pattern portion 113a and the fourth pattern portion 115b (or the second connection pattern 116).

[0340] According to an embodiment of the present disclosure, the first connection member 218 may pass through (or penetrate) the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and the plurality of insulating members 117-1, 117-2, and 117-3, and may be filled in one or more first holes 113h, one or more first through holes 111v1, and one or more second through holes 116h, and thus may be electrically or commonly connected to the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. Therefore, the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may commonly receive the same driving signal (or sound signal or voice signal) via (or through) the first connection member 218, the first pattern portion 113a, and the fourth pattern portion 115b (or the second connection pattern 116).

[0341] The second connection member 219 may pass through (or penetrate) the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. The second connection member 219 may pass through (or penetrate) the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and the plurality of insulating members 117-1, 117-2, and 117-3, and may be electrically connected to the third pattern portion 115a and the second pattern portion 113b (or the first connection pattern 114) of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 219 may pass through (or penetrate) the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 219 may be commonly connected to the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the third pattern portion 115a and the second pattern portion 113b (or the first connection pattern 114).

[0342] According to an embodiment of the present disclosure, the second connection member 219 may pass through (or penetrate) the vibration layer 111 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 and the plurality of insulating members 117-1, 117-2, and 117-3, and may be filled in one or more first through holes 114h, one or more second through holes 111v2, and one or more second holes 115h, and thus may be electrically or commonly connected to the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. Therefore, the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may commonly receive the same driving signal (or sound signal or voice signal) via (or through) the second connection member 219, the third pattern portion 115a, and the second pattern portion 113b (or the first connection pattern 114).

[0343] Each of the first connection member 218 and the second connection member 219 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 connection member 218 and the second connection member 219 may include a thermosetting electrode material, a light-curing (or ultraviolet (UV) curing) electrode material or a solution-type electrode material, but the embodiment of the present disclosure is not limited thereto. For example, the electrode material of each of the first connection member 218 and the second connection member 219 may include silver (Ag), nickel (Ni), a silver alloy or a nickel alloy, but the embodiment of the present disclosure is not limited thereto. For example, each of the first connection member 218 and the second connection member 219 may include 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 embodiment of the present disclosure is not limited thereto.

[0344] Reference Fig.18 , Fig. 22 and Fig.23 For example, the vibration device 100 according to another embodiment of the present disclosure may further include a signal supply member 190 .

[0345] The signal supply member 190 may be configured to be electrically connected to the vibration generating part 110 at one side of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first connection member 218 and the second connection member 219 at one side of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) on the first surface 110a of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) between the first cover member 130 and the first surface 110a of the vibration generating part 110. The signal supply member 190 may be disposed (or configured) between the first cover member 130 and the electrode layer (or the uppermost electrode layer) of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first connection pattern 114 and the electrode layer (or the uppermost electrode layer) at the first surface 110a of the vibration generating part 110 between the first cover member 130 and the first surface 110a of the vibration generating part 110. The signal supply member 190 may be configured to be electrically connected to the first pattern portion 113a and the first connection pattern 114 of the first electrode layer (113) at the first vibration part 110-1 of the vibration generating part 110. In addition to the first electrode layer 113 of the first vibration part 110-1 being electrically connected to the first pattern portion 113a and the first connection pattern 114, the signal supply member 190 may be similar to the above reference. Fig.12 , Fig.13 and Fig.17 The signal supply member 190 described in the example is substantially the same as that in FIG. 1 , and thus, a repeated description thereof may be omitted or will be briefly given.

[0346] A portion of the signal supply member 190 may be disposed at a portion between a peripheral portion of the first cover member 130 and a peripheral portion of the second cover member 150 , or inserted into (or accommodated in) a portion between a peripheral portion of the first cover member 130 and a peripheral portion of the second cover member 150 .

[0347] The signal supply member 190 may include a base member 191, a first signal line 193, a second signal line 195, and an insulating film 197. The signal supply member 190 may be similar to the above reference except that the first signal line 193 is electrically connected to the first pattern portion 113a and the second signal line 195 is electrically connected to the first connection pattern 114. Fig.12 , Fig.13 and Fig.17 The signal supply member 190 described in the example is substantially the same as that in FIG. 1 , and thus, a repeated description thereof may be omitted or will be briefly given.

[0348] Each of the end portions (or one side) 193a and 195a of the first signal line 193 and the second signal line 195 of the signal supply member 190 may be electrically connected to the vibration generating part 110 in the same direction. Therefore, the first signal line 193 and the second signal line 195 of the signal supply member 190 may be electrically connected to the vibration generating part 110 in the same direction, so that the structure and manufacturing process of the signal supply member 190 may be simplified.

[0349] An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first surface 110a of the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to the first pattern portion 113a of the first vibration part 110-1 in the vibration generating part 110 between the first surface 110a of the vibration generating part 110 and the first cover member 130. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration part 110-1 and the first pattern portion 113a. An end portion (or one side) 193a of the first signal line 193 may be electrically connected to a portion of the first electrode layer 113 of the first vibration part 110-1, the first pattern portion 113a, and the upper surface of the first connection member 218 filled in one or more first holes 113h at the first pattern portion 113a. Therefore, the driving signal (or first driving signal) provided from the vibration driving circuit can be provided to the first electrode layer 113 of the first vibration part 110-1 of the vibration generating part 110 via (or through) the first signal line 193, and can be provided commonly to the first electrode layer 113 of each of the other vibration parts 110-2, 110-3 and 110-4 of the vibration generating part 110 via (or through) the first connecting member 218.

[0350] An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the first connection pattern 114 in (within) the second pattern portion 113b of the first vibration portion 110-1, between the first surface 110a of the vibration generating portion 110 and the first cover member 130. An end portion (or one side) 195a of the second signal line 195 may be electrically connected to the first connection pattern 114 and the upper surface of the second connection member 219 filled in the one or more second holes 114h of the first connection pattern 114. Therefore, a driving signal (or a second driving signal) provided from the vibration driving circuit may be provided to the first connection pattern 114 via (or through) the second signal line 195, and may be provided to the second electrode layer 115 of each of the plurality of vibration portions 110-1, 110-2, 110-3, and 110-4 of the vibration generating portion 110 in common via (or through) the first connection pattern 114 and the second connection member 219.

[0351] The vibration device 100 according to another embodiment of the present disclosure may have the same Figures 11 to 17 The effect of the vibration device 100 described in the example is basically the same effect.

[0352] Fig.24 According to another embodiment of the present disclosure Fig.19 Another exploded perspective view of the vibration generating unit shown. Fig.25 Another embodiment of the present disclosure is illustrated. Fig.24 An exploded perspective view of the vibration unit shown. Fig.26 According to another embodiment of the present disclosure, Fig.19 Another cross-sectional view taken along line HH′ shown in FIG. Figures 24 to 26 The above reference is illustrated Figures 18 to 23 Hereinafter, the vibration device 100 according to another embodiment of the present disclosure will be described with reference to the elements different from the vibration device 100 according to the embodiment of the present disclosure.

[0353] Reference Figure 24 to Figure 26For example, in the vibration generating part 110 of the vibration device 100 according to another embodiment of the present disclosure, local parts of the vibration layer 111 of the vertically stacked plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 may be constructed to have different polarization directions (or polarization directions). For example, among the plurality of vibration parts 110-1 to 110-4, the vibration layer 111 of each of the even-numbered vibration parts 110-2 and 110-4 may have a polarization direction (or polarization direction) different from the polarization direction (or polarization direction) of the vibration layer 111 of each of the odd-numbered vibration parts 110-1 and 110-3. For example, the vibration layers 111 of the even-numbered vibration parts 110-2 and 110-4 may have the same polarization direction (or the same polarization direction), and the vibration layers 111 of the odd-numbered vibration parts 110-1 and 110-3 may have different polarization directions (or different polarization directions). The vibration layer 111 of the odd-numbered vibration parts 110-1 and 110-3 may have a polarization direction (or polarization direction) from the first electrode layer 113 toward the second electrode layer 115. The vibration layer 111 of the even-numbered vibration parts 110-2 and 110-4 may have a polarization direction (or polarization direction) from the second electrode layer 115 toward the first electrode layer 113. Therefore, the vibration layer 111 of the even-numbered vibration parts 110-2 and 110-4 and the vibration layer 111 of the odd-numbered vibration parts 110-1 and 110-3 may have polarization directions (or polarization directions) opposite to each other.

[0354] According to an embodiment of the present disclosure, the second electrode layer 115 of the odd-numbered vibration parts 110-1 and 110-3 may face the second electrode layer 115 of the even-numbered vibration parts 110-2 and 110-4 disposed thereon, and the first electrode layer 113 of the odd-numbered vibration parts 110-1 and 110-3 may face the first electrode layer 113 of the even-numbered vibration parts 110-2 and 110-4 disposed thereunder. For example, the second electrode layer 115 of the second vibration part 110-2 may face the second electrode layer 115 of the first vibration part 110-1, and the first electrode layer 113 of the second vibration part 110-2 may face the first electrode layer 113 of the third vibration part 110-3. The second electrode layer 115 of the fourth vibration part 110-4 may face the second electrode layer 115 of the third vibration part 110-3, and the first electrode layer 113 of the fourth vibration part 110-4 may be the lowermost electrode layer of the vibration generating part 110.

[0355] Each of the odd-numbered vibration parts 110-1 and 110-3 or the first vibration part 110-1 and the third vibration part 110-3 among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 may include a vibration layer 111, a first electrode layer 113, a second electrode layer 115, a first pattern portion 113a, a second pattern portion 113b, a third pattern portion 115a, a fourth pattern portion 115b, a first connection pattern 114, and a second connection pattern 116. Each of the first vibration part 110-1 and the third vibration part 110-3 may be the same as that described above with reference to Figures 18 to 23 The first vibration part 110 - 1 and the third vibration part 110 - 3 described in the example are substantially the same, and thus, a repeated description thereof may be omitted or will be briefly given.

[0356] Each of the even-numbered vibration parts 110-2 and 110-4, or the second vibration part 110-2 and the fourth vibration part 110-4 among the plurality of vibration parts 110-1, 110-2, 110-3 and 110-4 may include a vibration layer 111, a first electrode layer 113, a second electrode layer 115, a first pattern portion 113a, a second pattern portion 113b, a third pattern portion 115a, a fourth pattern portion 115b, a first connection pattern 114 and a second connection pattern 116. In each of the even-numbered vibration parts 110-2 and 110-4 or the second vibration part 110-2 and the fourth vibration part 110-4, each of the first electrode layer 113, the second electrode layer 115, the first pattern part 113a, the second pattern part 113b, the third pattern part 115a, the fourth pattern part 115b, the first connection pattern 114, and the second connection pattern 116 may be substantially the same as each of the odd-numbered vibration parts 110-1 and 110-3 or the first vibration part 110-1 and the third vibration part 110-3 except for the position, and thus, a repeated description thereof may be omitted or will be briefly given.

[0357] In each of the even-numbered vibration parts 110 - 2 and 110 - 4 or the second vibration part 110 - 2 and the fourth vibration part 110 - 4 , the first electrode layer 113 may be configured at the second surface 111 b of the vibration layer 111 , and the second electrode layer 115 may be configured at the first surface 111 a of the vibration layer 111 .

[0358] In each of the even-numbered vibration parts 110-2 and 110-4 or the second vibration part 110-2 and the fourth vibration part 110-4, the first pattern part 113a may be configured at one side of the first electrode layer 113 to overlap or correspond to the first pattern part 113a of the odd-numbered vibration parts 110-1 and 110-3. The second pattern part 113b may be configured at one side of the first electrode layer 113 to overlap or correspond to the second pattern part 113b of the odd-numbered vibration parts 110-1 and 110-3. The first connection pattern 114 may be configured in (inside) the second pattern part 113b to overlap or correspond to the first connection pattern 114 of the odd-numbered vibration parts 110-1 and 110-3. The first pattern part 113a may include one or more first holes 113h, and the first connection pattern 114 may include one or more first through holes 114h.

[0359] In each of the even-numbered vibration parts 110-2 and 110-4 or the second vibration parts 110-2 and the fourth vibration parts 110-4, the third pattern part 115a may be configured at one side of the second electrode layer 115 to overlap or correspond to the second pattern part 113b of the odd-numbered vibration parts 110-1 and 110-3. The fourth pattern part 115b may be configured at one side of the second electrode layer 115 to overlap or correspond to the first pattern part 113a of the odd-numbered vibration parts 110-1 and 110-3. The second connection pattern 116 may be configured in (inside) the fourth pattern part 115b to overlap or correspond to the second connection pattern 116 of the odd-numbered vibration parts 110-1 and 110-3. The third pattern part 115a may include one or more second holes 115h, and the second connection pattern 116 may include one or more second through holes 116h.

[0360] The vibration layer 11 of each of the even-numbered vibration parts 110 - 2 and 110 - 4 or the second vibration part 110 - 2 and the fourth vibration part 110 - 2 and 110 - 4 may further include one or more first through holes 111 v 1 and one or more second through holes 111 v 2 .

[0361] In each of the even-numbered vibration parts 110-2 and 110-4 or the second vibration part 110-2 and the fourth vibration part 110-4, one or more first through holes 111v1 may be configured at the vibration layer 111 between the one or more first holes 113h and the one or more second through holes (or fourth holes) 116h. One or more first through holes 111v1 may be configured at the vibration layer 111 to overlap with the one or more first holes 113h and the one or more second through holes 116h. Therefore, the one or more first holes 113h, the one or more second through holes 116h, and the one or more first through holes 111v1 may be connected (or communicated) to each other along the third direction Z.

[0362] In each of the even-numbered vibration parts 110-2 and 110-4 or the second vibration part 110-2 and the fourth vibration part 110-4, one or more second through holes 111v2 may be configured at the vibration layer 111 between one or more second holes 115h and one or more first through holes (or third holes) 114h. One or more second through holes 111v2 may be configured at the vibration layer 111 to overlap with one or more second holes 115h and one or more first through holes 114h. Therefore, one or more second holes 115h, one or more first through holes 114h, and one or more second through holes 111v2 may be connected (or communicated) to each other along the third direction Z.

[0363] Each of the plurality of insulating members 117-1, 117-2, and 117-3 according to the embodiment of the present disclosure may be disposed (or inserted) between two vibration parts vertically adjacent to each other among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, some of the plurality of insulating members 117-1, 117-2, and 117-3 may be disposed (or inserted) between the second electrode layer 115 of the upper vibration part and the second electrode layer 115 of the lower vibration part among the two vibration parts vertically adjacent to each other. Other insulating members of the plurality of insulating members 117-1, 117-2, and 117-3 may be disposed (or inserted) between the first electrode layer 113 of the upper vibration part and the first electrode layer 113 of the lower vibration part among the two vibration parts vertically adjacent to each other. For example, the first insulating member 117-1 may be disposed between the second electrode layer 115 of the first vibration part 110-1 and the second electrode layer 115 of the second vibration part 110-2. The second insulating member 117-2 may be disposed between the first electrode layer 113 of the second vibration part 110-2 and the first electrode layer 113 of the third vibration part 110-3. The third insulating member 117-3 may be disposed between the second electrode layer 115 of the third vibration part 110-3 and the second electrode layer 115 of the fourth vibration part 110-4. Therefore, each of the plurality of insulating members 117-1, 117-2, and 117-3 may be disposed between the same electrode layers of two vibration parts vertically adjacent to each other among the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and thus, electrical connection (or short circuit) between the electrode layers 113 and 115 of the two vibration parts vertically adjacent to each other may be prevented or reduced.

[0364] Each of the plurality of insulating members 117-1, 117-2, and 117-3 according to an embodiment of the present disclosure may include a fifth pattern portion 117a and a sixth pattern portion 117b, and the fifth pattern portion 117a and the sixth pattern portion 117b may be connected to the fifth pattern portion 117a and the sixth pattern portion 117b. Fig.24 The descriptions are the same as those of , and therefore, their repeated descriptions may be omitted or will be briefly provided.

[0365] The vibration device 100 or the vibration generating part 110 according to another embodiment of the present disclosure may further include a first connecting member 218 and a second connecting member 219, and the first connecting member 218 and the second connecting member 219 may be connected to the first connecting member 218 and the second connecting member 219. Fig. 22 The description is the same as that of , and therefore, its repeated description may be omitted or will be briefly given below.

[0366] The first connection member 218 may pass through (or penetrate) the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the first pattern portion 113a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the first connection member 218 may be commonly connected to the first electrode layer 113 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the first pattern portion 113a and the fourth pattern portion 115b (or the second connection pattern 116). Therefore, the first electrode layer 113 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can jointly receive the same driving signal (or sound signal or voice signal) via (or through) the first connecting member 218, the first pattern portion 113a and the fourth pattern portion 115b (or the second connecting pattern 116).

[0367] The second connection member 219 may pass through (or penetrate) the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4, and may be electrically connected to the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the third pattern portion 115a of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4. For example, the second connection member 219 may be commonly connected to the second electrode layer 115 of each of the plurality of vibration parts 110-1, 110-2, 110-3, and 110-4 via (or through) the third pattern portion 115a and the second pattern portion 113b (or the first connection pattern 114). Therefore, the second electrode layer 115 of each of the multiple vibration parts 110-1, 110-2, 110-3 and 110-4 can jointly receive the same driving signal (or sound signal or voice signal) via (or through) the second connecting member 219, the third pattern portion 115a and the second pattern portion 113b (or the first connecting pattern 114).

[0368] The vibration device 100 according to another embodiment of the present disclosure may further include a signal supply member 190 configured to be electrically connected to the vibration generating part 110 at one side of the vibration generating part 110, which may be described above with reference to FIG. Fig.18 , Fig. 22 and Fig.23 The examples are described above, and therefore, a repeated description thereof may be omitted or will be briefly provided.

[0369] The vibration device 100 according to another embodiment of the present disclosure may have the same Figures 18 to 23 The effect of the vibration device 100 described in the example is the same as that of the example, and each of the plurality of insulating members 117-1, 117-2 and 117-3 can be arranged between the same electrode layers of two vibration parts 110-1, 110-2, 110-3 and 110-4 vertically adjacent to each other, thereby preventing or reducing electrical connection (or short circuit) between the electrode layers 113 and 115 of the two vibration parts vertically adjacent to each other.

[0370] Fig. 27 A sound device according to an embodiment of the present disclosure is illustrated. Fig.28 According to the embodiment of the present disclosure, Fig. 27 The cross-sectional view extracted by line JJ′ shown in FIG.

[0371] Reference Fig. 27 and Fig.28 For example, the device according to an embodiment of the present disclosure may include a passive vibration member 1100 and one or more vibration generating devices 1200 .

[0372] According to the embodiments of the present disclosure, the "device" can be applied to realize a display device, a sound device, a sound output device, a sound generating device, a sound bar, a sound system, a sound device for a vehicle device, a sound output device for a vehicle device, or a sound bar for a vehicle device, an analog sign or a digital sign (such as an advertising sign, a poster or a bulletin board, etc.), etc., but the embodiments of the present disclosure are not limited thereto. For example, the vehicle device may include one or more seats and one or more glass windows. For example, the vehicle device may include a vehicle, a train, a ship or an aircraft, but the embodiments of the present disclosure are not limited thereto.

[0373] The display device may include: a display panel including a plurality of pixels for realizing a black and white or color image; 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, such as an organic light-emitting layer, etc., and a pixel may be a sub-pixel of any one of a plurality of colors for constructing a color image. Therefore, the "device" according to the embodiments of the present disclosure may include: a complete set of electronic equipment or a complete set of devices (or complete sets of equipment) including a finished product (or final product) of a display panel such as a liquid crystal display panel or an organic light-emitting display panel, such as a notebook computer, a television, a computer monitor, an equipment device including an automobile device or other types of vehicle devices; or a mobile electronic device, such as a smart phone or an electronic tablet, etc.

[0374] The simulated sign may be a billboard, a poster, a notice board, etc. The simulated sign may include sign content such as a statement, a picture, and a logo, etc. The sign content may be provided on the passive vibration member 1100 of the device so as to be visible. For example, the sign content may be directly attached to the passive vibration member 1100, and the sign content may be printed on a medium such as paper, and the medium may be attached to the passive vibration member 1100.

[0375] 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.

[0376] The passive vibration member 1100 according to the embodiment of the present disclosure can be a display panel including a display unit (or screen), and the display unit includes a plurality of pixels for realizing black and 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 vibration based on the drive of the vibration generating device 1200, while displaying an image on the display area, thereby generating or outputting a sound synchronized with the image in the display area. For example, the passive vibration member 1100 can be a vibration object, a display member, a display panel, a sign panel, a passive vibration plate, a front cover, a front member, a vibration panel, a sound panel, a passive vibration panel, a sound output plate, a sound vibration plate or an image screen, etc., but the embodiments of the present disclosure are not limited thereto.

[0377] The passive vibration member 1100 according to another embodiment of the present disclosure may be a vibration plate, which includes a metal material, or a non-metal material or a composite non-metal material having material properties suitable for vibrating to output sound through one or more vibration generating devices 1200. For example, the passive vibration member 1100 may include a vibration plate, which includes one or more materials of metal, plastic, wood, paper, fiber, fabric, leather, glass, rubber, carbon and mirror. For example, the paper may be a conical tubular paper for a speaker. For example, the conical tubular paper may be pulp or foam plastic, etc., but the embodiments of the present disclosure are not limited thereto.

[0378] According to another embodiment of the present disclosure, the passive vibration member 1100 may include a display panel including pixels of a display 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 of a display image, a screen panel onto which an image is projected from a display device, a lighting panel, a sign 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 mirror, 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.

[0379] 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 through the support member 1150. Thus, the one or more vibration generating devices 1200 may vibrate the passive vibration member 1100 to generate or output one or more of vibration and sound based on the vibration of the passive vibration member 1100.

[0380] The one or more vibration generating devices 1200 may include the above reference Figures 1 to 26 Thus, the above reference to one or more vibration devices described in the examples. Figures 1 to 26 The description of the vibration device described in the example may include Fig. 27 and Fig.28 In the description of the illustrated vibration generating apparatus 1200 , therefore, like reference numerals refer to like elements, and a repeated description may be omitted or may be briefly provided.

[0381] The support member 1150 may be disposed between the vibration generating device 1200 and the passive vibration member 1100. The support member 1150 may be disposed between at least a portion of the vibration generating device 1200 and the passive vibration member 1100. The support member 1150 according to an embodiment of the present disclosure may be connected between the passive vibration member 1100 and a central portion of the vibration generating device 1200 except for a peripheral portion.

[0382] According to an embodiment of the present disclosure, the support member 1150 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 central portion) of the vibration generating device 1200 may be the center of vibration, and thus, the vibration of the vibration generating device 1200 may be effectively transmitted to the passive vibration member 1100 via (or through) the support member 1150. The peripheral portion of the vibration generating device 1200 may be spaced apart from each of the support member 1150 and the passive vibration member 1100, and may be lifted without being connected to the support member 1150 and / or the passive vibration member 1100, and thus, in the flexible vibration (or bending vibration) of the vibration generating device 1200, the peripheral portion of the vibration generating device 1200 may be prevented (or reduced) from vibrating by the support member 1150 and / or the passive vibration member 1100, and thus the vibration amplitude (or displacement amplitude) of the vibration generating device 1200 may be increased. Therefore, the vibration amplitude (or displacement amplitude) of the passive vibration component 1100 based on the vibration of the vibration generating device 1200 can be increased, thereby further enhancing 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 component 1100.

[0383] The supporting member 1150 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 a full-surface attachment scheme (or a full-surface bonding scheme).

[0384] The support member 1150 according to an embodiment of the present disclosure may be constructed as a material including an adhesive layer, which has good adhesive force or attachment force relative 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 1150 may include a foam pad, a double-sided tape, a double-sided foam tape or an adhesive, etc., but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the support member 1150 may include epoxy resin, acrylate, silicone or polyurethane, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the support member 1150 may include an acrylic-based material (or substance) having the following characteristics: relatively better adhesion and higher hardness than polyurethane. Therefore, the transmission efficiency of the vibration transmitted from one or more vibration generating devices 1200 to the passive vibration member 1100 can be increased. For example, the support member 1150 may be a support component, a transmission member, a vibration transmission member, a panel connection member or a panel coupling member.

[0385] The apparatus according to an embodiment of the present disclosure may further include a rear member 1300 and a coupling member 1350 .

[0386] The rear member 1300 may be disposed at the rear surface 1000a of the passive vibration member 1100. The rear member 1300 may be disposed at the rear surface 1000a of the passive vibration member 1100 to cover one or more vibration generating devices 1200. The rear member 1300 may be disposed at the rear surface 1000a of the passive vibration member 1100 to cover the entirety of the rear surface 1000a of the one or more vibration generating devices 1200 and the passive vibration member 1100. For example, the rear member 1300 may have the same size 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 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.

[0387] 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 laminated structure in which one or more of a glass material, a plastic material, and a metal material are laminated, but the embodiments of the present disclosure are not limited thereto.

[0388] 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 device according to an embodiment of the present disclosure is applied to a sound device or a sound bar, each of the passive vibration member 1100 and the rear member 1300 may have a rectangular shape, wherein the length of the long side is two or more times longer than the short side, but embodiments of the present disclosure are not limited thereto.

[0389] 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.

[0390] 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 a double-sided tape, a single-sided tape, a double-sided foam tape, or a double-sided adhesive foam pad, but the 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 of an elastomer.

[0391] The rear member 1300 according to another embodiment of the present disclosure may further include a side wall portion supporting the rear peripheral portion of the passive vibration member 1100. The side wall portion of the rear member 1300 may protrude or bend from the front peripheral portion of the rear member 1300 toward the rear peripheral portion of the passive vibration member 1100, and therefore, a gap space GS may be provided between the passive vibration member 1100 and the rear member 1300. For example, the coupling member 1350 may be configured to be connected between the side wall 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 may 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 may support the rear peripheral portion of the passive vibration member 1100.

[0392] According to another embodiment of the present disclosure, the passive vibration member 1100 may further include a side wall portion connected to the front peripheral portion of the rear member 1300. The side wall portion of the passive vibration member 1100 may protrude or bend from the rear peripheral portion of the passive vibration member 1100 toward the front peripheral portion of the rear member 1300, and therefore, a gap space GS may be provided between the passive vibration member 1100 and the rear member 1300. The rigidity of the passive vibration member 1100 may be increased based on the side wall portion. For example, the coupling member 1350 may be configured to be connected between the side wall portion of the passive vibration member 1100 and the front peripheral portion of the rear member 1300. Therefore, the rear member 1300 may cover one or more vibration generating devices 1200, and may 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 may support the rear peripheral portion of the passive vibration member 1100.

[0393] The device according to an embodiment of the present disclosure may further include one or more housings 1250 .

[0394] The housing 1250 may be connected to or coupled to the rear peripheral portion of the passive vibration member 1100 to cover one or more vibration generating devices 1200 individually. For example, the housing 1250 may be connected to or coupled to the rear surface 1000a of the passive vibration member 1100 by an adhesive member 1251. The housing 1250 may construct a closed space covering or surrounding one or more vibration generating devices 1200 at the rear surface 1000a of the passive vibration member 1100. For example, the housing 1250 may be a shell, a housing, a shell member, a shell member, a cabinet, a closed member, a closed cover, a closed box or a sound box, but embodiments of the present disclosure are not limited thereto. The closed space may be an air gap, a vibration space, a sound space or a sound box, but embodiments of the present disclosure are not limited thereto.

[0395] The housing 1250 may include one or more materials of a metal material, a non-metal material, and a composite non-metal material. For example, the housing 1250 may include one or more materials of metal, plastic, carbon, and wood, but the embodiments of the present disclosure are not limited thereto.

[0396] The housing 1250 according to an embodiment of the present disclosure can maintain an impedance component based on the air acting on the passive vibration member 1100 when the passive vibration member 1100 or the vibration generating device 1200 is vibrating. For example, the air around the passive vibration member 1100 can resist the vibration of the passive vibration member 1100 and can act as an impedance component having a frequency-based resistance and reactance component. Therefore, the housing 1250 can construct a closed space around one or more vibration generating devices 1200 in the rear surface 1000a of the passive vibration member 1100, so that the impedance component (or air impedance or elastic impedance) acting on the passive vibration member 1100 can be maintained based on air, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the vocal cords including the low-pitched vocal cords, and enhancing the sound quality of the high-pitched vocal cords.

[0397] The adhesive member 1251 may be configured to minimize, reduce or prevent the vibration of the vibration member 1100 from being transmitted to the housing 1250. The adhesive member 1251 may include material properties suitable for preventing vibration. For example, the adhesive member 1251 may include a material having elasticity. For example, the adhesive member 1251 may include a material having elasticity to absorb vibration (or absorb shock). The adhesive member 1251 according to an embodiment of the present disclosure may be configured as a polyurethane material or a polyolefin material, but the embodiments of the present disclosure are not limited thereto. For example, the adhesive member 1251 may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, a double-sided foam pad and a double-sided buffer tape, but the embodiments of the present disclosure are not limited thereto.

[0398] Fig.29 The sound output characteristics of the vibration device according to the embodiment of the present disclosure and the sound output characteristics of the vibration device according to the experimental example are illustrated. Fig.29 , the horizontal axis represents frequency in Hertz (Hz), and the vertical axis represents sound pressure level (SPL) in decibels (dB).

[0399] The sound output characteristics can be measured by sound analysis equipment. The sound analysis equipment may include a control PC, a sound card for sending and receiving sounds, an amplifier for amplifying the sound generated by the sound card and sending it to the sound device, and a microphone for collecting the sound generated in the device based on the drive of the vibration device. The sound collected by the microphone is input to the control PC through the sound card, and the sound is checked in the control program to analyze the sound of the device.

[0400] The sound output characteristics have been measured in an anechoic chamber (which is closed in all directions). When measuring, the applied frequency signal is applied as a sine sweep in the range of 20 Hz to 20 kHz, and the measurement results are smoothed by 1 / 3 octave. The separation distance between the device and the microphone is adjusted to 30 cm. However, the measurement method of the sound output characteristics may not be limited to this.

[0401] exist Fig.29 In FIG. 1 , the dotted line represents the sound output characteristics of the vibration device according to the experimental example including one vibration part. The single-point dashed line represents the sound output characteristics of the vibration device including two vibration parts stacked vertically. The solid line represents the sound output characteristics of the vibration device including three vibration parts stacked vertically. The thick solid line represents the sound output characteristics of the vibration device including four vibration parts stacked vertically.

[0402] like Fig.29 As shown, it can be seen that as the number of vertically stacked vibration parts increases, the sound pressure level increases. For example, it can be seen that, as shown by the dotted line, the vibration device according to the experimental example including one vibration part has an average sound pressure level of about 72.85 dB in the frequency range of 150 Hz to 8 kHz; and as shown by the thick solid line, the vibration device including four vertically stacked vibration parts has an average sound pressure level of about 83.17 dB in the frequency range of 150 Hz to 8 kHz. Therefore, compared with the vibration device according to the experimental example, in the vibration device according to the embodiment of the present disclosure, as the number of vertically stacked vibration parts increases, the sound pressure level can be enhanced by about 10 dB.

[0403] A vibration device and a sound device including the same according to an embodiment of the present disclosure will be described below.

[0404] A vibration device according to one or more embodiments of the present disclosure may include a vibration generating part. The vibration generating part may include: a plurality of vibration parts, each of the plurality of vibration parts includes a first surface and a second surface, the first surface includes a first pattern portion, the second surface includes a third pattern portion, and the plurality of vibration parts are stacked on top of each other; a first connecting member, the first connecting member is electrically connected to the first pattern portion of each of the plurality of vibration parts; and a second connecting member, the second connecting member is electrically connected to the third pattern portion of each of the plurality of vibration parts.

[0405] According to one or more embodiments of the present disclosure, the first surface of each of the multiple vibration parts may also include a second pattern part having a shape different from that of the first pattern part, and the second surface of each of the multiple vibration parts may also include a fourth pattern part having a shape different from that of the third pattern part.

[0406] According to one or more embodiments of the present disclosure, the first connection member may be electrically disconnected (or separated or isolated) from the fourth pattern portion of each of the plurality of vibration parts. The second connection member may be electrically disconnected (or separated or isolated) from the second pattern portion of each of the plurality of vibration parts.

[0407] According to one or more embodiments of the present disclosure, each of the multiple vibration parts may include: a vibration layer, which includes a piezoelectric material; a first electrode layer, which is located at a first surface of the vibration layer, the first electrode layer includes a first pattern portion and a second pattern portion; and a second electrode layer, which is located at a second surface of the vibration layer opposite to the first surface, the second electrode layer includes a third pattern portion and a fourth pattern portion.

[0408] According to one or more embodiments of the present disclosure, each of the side surface of the first electrode layer and the side surface of the second electrode layer may be spaced apart from the side surface of the vibration layer. The first pattern portion and the second pattern portion may be configured at one side surface of the first electrode layer. The third pattern portion and the fourth pattern portion may be configured at one side surface of the second electrode layer.

[0409] According to one or more embodiments of the present disclosure, the distance between the side surface of the first electrode layer and the side surface of the vibration layer may be greater than the thickness of the vibration layer or may be two or more times the thickness of the vibration layer. The distance between the side surface of the second electrode layer and the side surface of the vibration layer may be greater than the thickness of the vibration layer or may be two or more times the thickness of the vibration layer.

[0410] According to one or more embodiments of the present disclosure, the first pattern portion may protrude from one side surface of the first electrode layer toward one side surface of the vibration layer. The second pattern portion may be spaced apart from the first pattern portion and may be configured to be recessed from one side surface of the first electrode layer.

[0411] According to one or more embodiments of the present disclosure, an end side surface of the first pattern portion may be aligned with one side surface of the vibration layer.

[0412] According to one or more embodiments of the present disclosure, the third pattern portion may protrude from one side surface of the second electrode layer to one side surface of the vibration layer to correspond to the first pattern portion. The fourth pattern portion may be spaced apart from the third pattern portion and may be configured to be recessed from one side surface of the second electrode layer to correspond to the second pattern portion.

[0413] According to one or more embodiments of the present disclosure, an end side surface of the third pattern portion may be aligned with one side surface of the vibration layer.

[0414] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating part may be provided between the first cover member and the second cover member.

[0415] According to one or more embodiments of the present disclosure, the first connection member may be configured at one side surface of the vibration generating portion, and may be connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the first pattern portion. The second connection member may be configured at one side surface of the vibration generating portion, and may be connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the third pattern portion.

[0416] According to one or more embodiments of the present disclosure, the vibration device may further include a signal supply member electrically connected to the vibration generating part. The signal supply member may include a first signal line electrically connected to the first pattern portion and the first connection member and a second signal line electrically connected to the third pattern portion and the second connection member.

[0417] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating part may be disposed between the first cover member and the second cover member. A portion of the signal supply member may be accommodated between the first cover member and the second cover member.

[0418] According to one or more embodiments of the present disclosure, the first signal line may be provided between the first cover member and the vibration generating part. The second signal line may be provided between the second cover member and the vibration generating part.

[0419] According to one or more embodiments of the present disclosure, the vibration device may further include a pad member configured at the signal supply member. The signal supply member may further include a base film and an insulating film. The first signal line and the second signal line may be arranged between the base film and the insulating film. The pad member may be arranged between the base film and the insulating film. A portion of the pad member may be accommodated between the first cover member and the second cover member.

[0420] According to one or more embodiments of the present disclosure, the first vibration part of the plurality of vibration parts may further include a connection pattern located at the first surface of the vibration layer and electrically disconnected (or separated or isolated) from the first electrode layer. The connection pattern may be electrically connected to the second connection member.

[0421] According to one or more embodiments of the present disclosure, each of the side surface of the first electrode layer and the side surface of the second electrode layer may be spaced apart from the side surface of the vibration layer. The first pattern portion may protrude from one side surface of the first electrode layer toward one side surface of the vibration layer. The second pattern portion may be spaced apart from the first pattern portion and may be configured to be recessed from one side surface of the first electrode layer. The connection pattern may be configured in the second pattern portion and may extend toward one side surface of the vibration layer.

[0422] According to one or more embodiments of the present disclosure, the connection pattern may be configured in an island shape on the first surface of the vibration layer of the first vibration part and may be aligned with one side surface of the vibration layer.

[0423] According to one or more embodiments of the present disclosure, the third pattern portion may protrude from one side surface of the second electrode layer to one side surface of the vibration layer to correspond to the first pattern portion. The fourth pattern portion may be spaced apart from the third pattern portion and may be configured to be recessed from one side surface of the second electrode layer to correspond to the second pattern portion.

[0424] According to one or more embodiments of the present disclosure, the first connection member may be configured at one side surface of the vibration generating portion, and may be connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the first pattern portion. The second connection member may be configured at one side surface of the vibration generating portion, and may be connected to one side surface of the vibration layer of each of the plurality of vibration portions and one side surface of the third pattern portion, and may be connected to the connection pattern.

[0425] According to one or more embodiments of the present disclosure, the vibration device may further include a signal supply member electrically connected to the vibration generating part. The signal supply member may include a first signal line electrically connected to the first connection member and a second signal line electrically connected to the second connection member.

[0426] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating part may be disposed between the first cover member and the second cover member. A portion of the signal supply member may be accommodated between the first cover member and the second cover member.

[0427] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating unit may be disposed between the first cover member and the second cover member. The first signal line and the second signal line may be disposed between the first cover member and the vibration generating unit.

[0428] According to one or more embodiments of the present disclosure, the first connection member may pass through the plurality of vibration parts and may be electrically connected to the first pattern portion of each of the plurality of vibration parts. The second connection member may pass through the plurality of vibration parts and may be electrically connected to the third pattern portion of each of the plurality of vibration parts.

[0429] According to one or more embodiments of the present disclosure, the first connection member may pass through the vibration layer of each of the plurality of vibration parts and the plurality of insulating members between the plurality of vibration parts, and may be electrically connected to the first pattern portion of each of the plurality of vibration parts and overlap with the fourth pattern portion of each of the plurality of vibration parts. The second connection member may pass through the vibration layer of each of the plurality of vibration parts and the plurality of insulating members, and may be electrically connected to the third pattern portion of each of the plurality of vibration parts and overlap with the second pattern portion of each of the plurality of vibration parts.

[0430] According to one or more embodiments of the present disclosure, each of the plurality of vibration parts may include: a first connection pattern, which is disposed at a first surface of the vibration layer and is electrically disconnected (or separated or isolated) from the first electrode layer; a second connection pattern, which is disposed at a second surface of the vibration layer and is electrically disconnected (or separated or isolated) from the second electrode layer. The first pattern portion may include a first hole configured at the first electrode layer. The second pattern portion may include a second hole configured at the first connection pattern. The third pattern portion may include a third hole configured at the second electrode layer. The fourth pattern portion may include a fourth hole configured at the second connection pattern.

[0431] According to one or more embodiments of the present disclosure, the first connection member may be electrically connected to the second connection pattern of each of the plurality of vibration parts, and the second connection member may be electrically connected to the first connection pattern of each of the plurality of vibration parts.

[0432] According to one or more embodiments of the present disclosure, each of the plurality of insulation members may include a fifth pattern portion overlapping the first connection pattern and a sixth pattern portion overlapping the second connection pattern.

[0433] According to one or more embodiments of the present disclosure, the vibration layers of the plurality of vibration parts may have the same polarization direction. Each of the plurality of insulating members may be disposed between two vibration parts vertically adjacent to each other among the plurality of vibration parts, and may be disposed between the second electrode layer of the upper vibration part and the first electrode layer of the lower vibration part of the two vibration parts vertically adjacent to each other.

[0434] According to one or more embodiments of the present disclosure, some vibration layers of the plurality of vibration parts may have different polarization directions. Each of the plurality of insulating members may be disposed between two vibration parts vertically adjacent to each other among the plurality of vibration parts. Some of the plurality of insulating members may be disposed between the second electrode layer of the upper vibration part and the second electrode layer of the lower vibration part of the two vibration parts vertically adjacent to each other. Other insulating members of the plurality of insulating members may be disposed between the first electrode layer of the upper vibration part and the first electrode layer of the lower vibration part of the two vibration parts vertically adjacent to each other.

[0435] According to one or more embodiments of the present disclosure, the vibration layer of each of the plurality of vibration parts may include: a first through hole located between the first hole and the fourth hole; and a second through hole located between the second hole and the third hole. A first connecting member may be provided at the first hole, the fourth hole, and the first through hole to pass through the vibration layers of the plurality of vibration parts and the plurality of insulating members. A second connecting member may be provided at the second hole, the third hole, and the second through hole to pass through the vibration layers of the plurality of vibration parts and the plurality of insulating members.

[0436] According to one or more embodiments of the present disclosure, the vibration device may further include a signal supply member electrically connected to the vibration generating part. The signal supply member may include a first signal line electrically connected to the first connection member and a second signal line electrically connected to the second connection member.

[0437] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating part may be disposed between the first cover member and the second cover member. A portion of the signal supply member may be accommodated between the first cover member and the second cover member.

[0438] According to one or more embodiments of the present disclosure, the vibration device may further include a first cover member and a second cover member. The vibration generating unit may be disposed between the first cover member and the second cover member. The first signal line and the second signal line may be disposed between the first cover member and the vibration generating unit.

[0439] A sound device according to one or more embodiments of the present disclosure may include: 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 include a vibration device. The vibration device may include a vibration generating unit. The vibration generating unit may include: a plurality of vibration units, each vibration unit including a first surface and a second surface, the first surface including a first pattern portion, the second surface including a third pattern portion, and the plurality of vibration units stacked on top of each other; a first connecting member electrically connected to the first pattern portion of each of the plurality of vibration units; and a second connecting member electrically connected to the third pattern portion of each of the plurality of vibration units.

[0440] According to one or more embodiments of the present disclosure, a sound device may further include a housing provided at a rear surface of the passive vibration member and configured to cover the one or more vibration generating devices.

[0441] According to one or more embodiments of the present disclosure, the passive vibration member may include one or more of the following: a vibration plate, a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display device, a light emitting diode lighting panel, an organic light emitting lighting panel, an inorganic light emitting lighting panel, a sign panel, a vehicle interior material, a vehicle exterior material, a vehicle glass window, a vehicle seat interior material, a vehicle roof material, a building roof material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window, and a mirror. The vibration plate may include one or more materials in metal, plastic, wood, paper, fiber, fabric, leather, glass, rubber, carbon, and a mirror.

[0442] According to one or more embodiments of the present disclosure, the sound device may further include a housing coupled to a rear surface of the passive vibration member to form a closed space covering the one or more vibration generating devices.

[0443] According to one or more embodiments of the present disclosure, the sound device may further include a rear member provided at a rear surface of the passive vibration member to cover the housing.

[0444] The vibration device according to one or more embodiments of the present disclosure can be applied to or included in the vibration device arranged on the sound device or display device.The sound device or display device according to one or more embodiments of the present disclosure can be applied to or included in the following: mobile device, video phone, smart watch, watch phone, wearable device, foldable device, rollable device, bendable device, flexible device, curved device, sliding device, variable device, electronic notepad, e-book, portable multimedia player (PMP), personal digital assistant (PDA), MP3 player, mobile medical device, desktop personal computer (PC), laptop PC, netbook, workstation, navigation device, car navigation device, car display device, car device, theater device, theater display device, TV, wallpaper display device, sign device, game console, notebook computer, display, camera, video camera and household appliances etc. In addition, the vibration device according to one or more embodiments of the present disclosure can be applied to or included in organic light emitting lighting device or inorganic light emitting lighting device. When the vibration device is applied to or included in the lighting device, the lighting device can be used as lamp and speaker. Furthermore, when the vibration device according to one or more embodiments of the present disclosure is applied to or included in a mobile device or the like, the sound device may be one or more of a speaker, a receiver, and a haptic device, but the embodiments of the present disclosure are not limited thereto.

[0445] It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure that fall within the scope of the claims and their equivalents.

[0446] CROSS-REFERENCE TO RELATED APPLICATIONS

[0447] This application claims priority to Korean Patent Application No. 10-2023-0085155 filed in Korea on Jun. 30, 2023, the entire contents of which are incorporated herein by reference.

Claims

1. A vibration device, comprising: Vibration generating unit, Wherein, the vibration generating unit comprises: a plurality of vibration parts, each of the plurality of vibration parts including a first surface and a second surface, the first surface including a first pattern portion, the second surface including a third pattern portion, the plurality of vibration parts being stacked on top of each other; a first connection member electrically connected to the first pattern portion of each of the plurality of vibration parts; and A second connection member electrically connected to the third pattern portion of each of the plurality of vibration parts.

2. The vibration device according to claim 1, wherein The first surface of each of the plurality of vibration parts further includes a second pattern portion having a shape different from that of the first pattern portion, and the second surface of each of the plurality of vibration parts further includes a fourth pattern portion having a shape different from that of the third pattern portion.

3. The vibration device according to claim 2, in, The first connection member is electrically separated from the fourth pattern portion of each of the plurality of vibration parts, and The second connection member is electrically separated from the second pattern portion of each of the plurality of vibration parts.

4. The vibration device according to claim 2, wherein Each of the plurality of vibration parts includes: a vibration layer, the vibration layer comprising a piezoelectric material; a first electrode layer, the first electrode layer being located at a first surface of the vibration layer, the first electrode layer comprising the first pattern portion and the second pattern portion; and A second electrode layer is provided at a second surface of the vibration layer opposite to the first surface, and the second electrode layer includes the third pattern portion and the fourth pattern portion.

5. The vibration device according to claim 4, in, Each of a side surface of the first electrode layer and a side surface of the second electrode layer is spaced apart from a side surface of the vibration layer, wherein the first pattern portion and the second pattern portion are configured at one side surface of the first electrode layer, and The third pattern portion and the fourth pattern portion are configured at one side surface of the second electrode layer.

6. The vibration device according to claim 5, in, A distance between a side surface of the first electrode layer and a side surface of the vibration layer is greater than a thickness of the vibration layer or is two or more times the thickness of the vibration layer, and The distance between the side surface of the second electrode layer and the side surface of the vibration layer is greater than the thickness of the vibration layer or is two times or more the thickness of the vibration layer.

7. The vibration device according to claim 5, in, The first pattern portion protrudes from one side surface of the first electrode layer toward one side surface of the vibration layer, and The second pattern portion is spaced apart from the first pattern portion and is configured to be recessed from one side surface of the first electrode layer.

8. The vibration device according to claim 7, wherein An end side surface of the first pattern portion is aligned with the one side surface of the vibration layer.

9. The vibration device according to claim 5, in, The third pattern portion protrudes from one side surface of the second electrode layer toward one side surface of the vibration layer to correspond to the first pattern portion, and The fourth pattern portion is spaced apart from the third pattern portion, and is configured to be recessed from the one side surface of the second electrode layer to correspond to the second pattern portion.

10. A sound device, comprising: Passive vibration components; as well as one or more vibration generating devices 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 9.

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