Sound device

Abstract

A sound device includes: a vibration member; and a vibrating device configured to vibrate the vibrating member. The vibrating member includes an inner member and an outer member surrounding the inner member.

Description

Technical Field

[0001] The present disclosure relates to a sound device, and more particularly, to a sound device for outputting sound. Background Art

[0002] Recently, the demand for thinner electronic devices has been increasing. In speakers applied to electronic devices, piezoelectric devices that can be realized with a thin thickness instead of voice coils are attracting more attention based on the demand for thinner devices.

[0003] 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

[0004] A speaker having a piezoelectric device or a vibration device can generate (or output) sound by vibrating a vibration plate according to the vibration of the piezoelectric device. The sound quality and / or sound pressure characteristics of the sound generated (or output) according to the vibration of the vibration plate can be changed by the material of the vibration plate.

[0005] The inventors of the present disclosure have recognized these limitations and have conducted various studies and experiments to improve or optimize the sound quality characteristics and / or sound pressure characteristics of the sound generated (or output) based on the material of the vibration membrane (or vibration member) in the device or vibration apparatus.

[0006] One or more aspects of the present disclosure are directed to providing a sound device that can enhance sound characteristics and / or sound pressure level characteristics of a sound.

[0007] One or more aspects of the present disclosure are directed to providing a sound device having enhanced flatness characteristics of a sound pressure level.

[0008] One or more aspects of the present disclosure are directed to providing a sound device that can reduce a dip phenomenon and a peak phenomenon of a sound pressure level.

[0009] One or more aspects of the present disclosure are directed to providing an acoustic device that can prevent or reduce cracks in the vibration device by preventing or reducing a bending phenomenon of the vibration member, and can prevent or reduce corrosion on the surface of the vibration member under a high temperature and humid environment.

[0010] One or more aspects of the present disclosure are directed to providing a sound device that may have uniform sound pressure characteristics by optimizing an area ratio of a vibration member and a vibration device.

[0011] Additional features, advantages and aspects of the present disclosure are partially set forth in the present disclosure, and will also be clear from the present disclosure 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 structures specifically pointed out in the present disclosure or derived therefrom, as well as the claims and the accompanying drawings.

[0012] To achieve these and other advantages and aspects of the present disclosure, as embodied and broadly described herein, in one or more aspects, a sound device includes a vibration member and a vibration device configured to vibrate the vibration member. The vibration member includes an inner member and an outer member surrounding the inner member.

[0013] A sound device according to one or more aspects of the present disclosure may include a vibration member and a vibration device configured to vibrate the vibration member. The vibration member may have a core-shell structure including a core and a shell having different materials.

[0014] In one or more aspects, a sound device includes: a vibration plate, a piezoelectric layer disposed on the vibration plate, and a signal supply line electrically connected between the piezoelectric layer and the vibration plate, the piezoelectric layer being configured to vibrate the vibration plate via a signal provided by the signal supply line. The vibration plate may include an inner member and an outer member surrounding the inner member.

[0015] The sound device according to one or more aspects of the present disclosure can improve the sound quality characteristics and / or the sound pressure characteristics of the sound, and improve the flatness characteristics of the sound pressure.

[0016] A sound device according to one or more aspects of the present disclosure can reduce valley portions and peak portions in sound.

[0017] The sound device according to one or more aspects of the present disclosure can prevent or reduce cracks from occurring in the vibration device by preventing or reducing a bending phenomenon of the vibration member, and can prevent or reduce corrosion from occurring on the surface of the vibration member under a high temperature and humid environment.

[0018] The sound device according to one or more aspects of the present disclosure may have uniform sound pressure characteristics by optimizing the area ratio of the vibration member and the vibration device.

[0019] 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.

[0020] 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.

[0021] Note:

[0022] Note 1. A sound device, comprising:

[0023] a vibrating member; and

[0024] a vibration device configured to vibrate the vibration member,

[0025] Wherein, the vibration component includes an inner component and an outer component surrounding the inner component.

[0026] Note 2. The sound device according to Note 1, wherein the outer member covers all surfaces of the inner member.

[0027] Note 3. The sound device according to Note 1, wherein the inner member is embedded inside the outer member.

[0028] Note 4. The sound device according to Note 1, wherein the inner member and the outer member are made of different materials.

[0029] Note 5. The sound device according to Note 4, wherein the internal component is made of metal material.

[0030] Note 6. The sound device according to Note 4, wherein the outer member is made of plastic material.

[0031] Supplementary note 7. The sound device according to Supplementary note 4, wherein the inner member is an aluminum material, and the outer member is an epoxy material.

[0032] Supplementary note 8. The acoustic device according to Supplementary note 1, wherein the inner member and the outer member are different from each other in at least one or more of rigidity, density, and Young's modulus.

[0033] Note 9. The sound device according to Note 8, wherein the density of the inner member is 1.7 g / cm 3 Up to 2.8g / cm 3 within the range.

[0034] Note 10. The sound device according to Note 8, wherein the modulus of the internal member is in the range of 1 GPa to 100 GPa.

[0035] Note 11. The sound device according to Note 8, wherein the density of the outer member is 1.2 g / cm 3 Up to 1.4g / cm 3 within the range.

[0036] Supplement 12. The sound device according to Supplement 8, wherein the modulus of the outer member is in the range of 2 GPa to 10 GPa.

[0037] Supplement 13. The sound device according to Supplement 1, wherein in a region where the inner member and the outer member vertically overlap, the thickness of the inner member is greater than the thickness of the outer member.

[0038] Supplement 14. The sound device according to Supplement 1, wherein the external component comprises:

[0039] a first outer member at a first surface of the inner member; and

[0040] A second outer member is at a second surface of the inner member opposite the first surface of the inner member.

[0041] Note 15. The sound equipment described in Note 14,

[0042] wherein the first outer member accommodates the entire first surface of the inner member and a first portion of a side surface of the inner member, and

[0043] The second outer member accommodates the entire second surface of the inner member and a second portion of a side surface of the inner member.

[0044] Supplementary note 16. The sound device according to Supplementary note 14, wherein the first outer member and the second outer member are made of the same material.

[0045] Supplementary note 17. The sound device according to Supplementary note 14, wherein the first outer member and the second outer member have the same thickness.

[0046] Supplement 18. The sound device according to Supplement 1, wherein the vibration device comprises:

[0047] a vibration portion including a piezoelectric material; and

[0048] A cover member covers at least one of a first surface of the vibration portion and a second surface of the vibration portion opposite to the first surface of the vibration portion.

[0049] Note 19. The sound equipment described in Note 18,

[0050] wherein the vibration device further comprises a signal supply member electrically connected to the vibration part, and

[0051] wherein a portion of the signal supply member is accommodated between the cover member and the vibration portion.

[0052] Supplementary note 20. The audio device according to Supplementary note 19, wherein the signal supply member and the vibration part are integrated into one body.

[0053] Note 21. The sound device according to Note 1, wherein the vibration device comprises:

[0054] a first vibration generating unit;

[0055] a second vibration generating part, the second vibration generating part being stacked on the first vibration generating part; and

[0056] an intermediate member between the first vibration generating part and the second vibration generating part, and

[0057] Wherein, one of the first vibration generating part and the second vibration generating part is connected to the vibration member.

[0058] Supplement 22. The sound device according to Supplement 21, wherein each of the first vibration generating unit and the second vibration generating unit comprises:

[0059] a vibration portion including a piezoelectric material; and

[0060] A cover member covers at least one of a first surface of the vibration portion and a second surface of the vibration portion opposite to the first surface.

[0061] Note 23. The sound device according to Note 1, further comprising:

[0062] a supporting member at a rear surface of the vibration member and including an inner space surrounding the rear surface of the vibration member; and

[0063] A coupling member through which the supporting member is coupled to the vibration member.

[0064] Supplement 24. The sound device according to Supplement 23, wherein the coupling member includes a first coupling member and a second coupling member between the vibration member and the support member, and

[0065] Wherein, the first connecting member is arranged inwardly from the second connecting member.

[0066] Note 25. The sound device according to Note 24, wherein the hardness of the first connecting member is greater than the hardness of the second connecting member.

[0067] Supplement 26. The sound device according to Supplement 24, wherein the hardness of the first connecting member is smaller than the hardness of the second connecting member.

[0068] Note 27. The sound device according to Note 1, wherein the area of ​​the vibration device is smaller than the area of ​​the vibration component.

[0069] Supplementary note 28. The sound device according to Supplementary note 1, wherein an area ratio of the vibration device to the vibration member is in the range of 0.08 to 0.12.

[0070] Note 29. A sound device, comprising:

[0071] a vibrating member; and

[0072] a vibration device configured to vibrate the vibration member,

[0073] The vibration member has a core-shell structure including a core and a shell having different materials.

[0074] Note 30. A sound device, comprising:

[0075] Vibration plate;

[0076] a piezoelectric layer disposed on the vibration plate; and

[0077] a signal supply line electrically connected between the piezoelectric layer and the vibration plate, the piezoelectric layer being configured to vibrate the vibration plate via a signal supplied through the signal supply line,

[0078] Wherein, the vibration plate includes an inner component and an outer component surrounding the inner component.

[0079] Note 31. The sound device according to Note 30, wherein the piezoelectric layer includes a first piezoelectric layer and a second piezoelectric layer, and the sound device further includes:

[0080] An intermediate layer is provided between the first piezoelectric layer and the second piezoelectric layer.

[0081] Supplementary note 32. The acoustic device according to Supplementary note 31, wherein one of the first piezoelectric layer and the second piezoelectric layer is connected to the vibration plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate various aspects and embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

[0083] Figure 1 is a perspective view illustrating a sound device according to an example aspect of the present disclosure.

[0084] Figure 2 According to an example aspect of the present disclosure, Figure 1 A cross-sectional view taken along line II′.

[0085] Figure 3 A vibration member according to an example aspect of the present disclosure is illustrated.

[0086] Figure 4 A vibration device according to example aspects of the present disclosure is illustrated.

[0087] Figure 5 According to an example aspect of the present disclosure, Figure 4 A cross-sectional view taken along line II-II′.

[0088] Figure 6 According to an example aspect of the present disclosure, Figure 4 A cross-sectional view taken along line III-III′.

[0089] Figure 7 A vibration layer according to another exemplary aspect of the present disclosure is illustrated.

[0090] Figure 8 A vibration layer according to another exemplary aspect of the present disclosure is illustrated.

[0091] Fig. 9 A vibration device according to another example aspect of the present disclosure is illustrated.

[0092] Fig.10 The density of the internal member according to the experimental example is illustrated.

[0093] Fig.11 The modulus of the internal member according to the experimental example is illustrated.

[0094] Fig.12 The sound output characteristics of the sound device according to the experimental example are illustrated.

[0095] Fig.13 The sound output characteristics of the sound device according to the experimental example are illustrated.

[0096] Fig.14 Sound output characteristics of a sound device according to example aspects of the present disclosure are illustrated.

[0097] Fig.15 Sound output characteristics of a sound device according to exemplary aspects and experimental examples of the present disclosure are illustrated.

[0098] Fig.16Sound output characteristics of a sound device according to exemplary aspects and experimental examples of the present disclosure are illustrated.

[0099] Fig.17 The sound output characteristics of the sound device according to the experimental example are illustrated.

[0100] Fig.18A A cross section of a vibration member according to an exemplary aspect of the present disclosure is illustrated.

[0101] Fig.18B An EDS analysis result of a vibration member according to an example aspect of the present disclosure is illustrated.

[0102] Fig.19 According to another exemplary aspect of the present disclosure, Figure 1 A cross-sectional view taken along line II′.

[0103] Fig. 20 Another exemplary aspect of the present disclosure is illustrated. Fig.19 The sound output characteristics of the sound device shown.

[0104] 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

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] The shapes, dimensions (e.g., size, length, width, height, thickness, position, radius, diameter, and area), proportions, ratios, angles, number of elements, etc. disclosed herein (including those shown in the drawings) are examples only, and thus, the disclosure is not limited to the details shown. Any implementation described herein as an "example" is not necessarily to be construed as being preferred or advantageous over other implementations. However, it should be noted that the relative sizes of the components shown in the drawings are part of the disclosure.

[0110] When the terms "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 exemplary 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.

[0111] Unless otherwise stated, the term "exemplary" is used to mean used as an example or illustration. 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 mentioned, an aspect, an example, an example aspect, an aspect, etc. may refer to one or more aspects, one or more examples, one or more example aspects, one or more aspects, etc. In addition, the term "may" encompasses all meanings of the term "can."

[0112] 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.

[0113] 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.

[0114] 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."

[0115] 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.

[0116] 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.

[0117] 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, sequence, or quantity of the 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 be referred to as the second element, and similarly, the second element can be referred to as 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) is “provided,” “set in,” “connected,” “coupled,” etc. to another element may be understood, for example, as at least a portion of the element being “provided,” “set in,” “connected,” “coupled,” etc. to at least a portion of another element, or as the entire element being “provided,” “set in,” “connected,” “coupled,” etc. to another element. Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) is “in contact with,” “overlaps,” etc. with another element may be understood, for example, as at least a portion of the element is in contact with, overlaps, etc. with at least a portion of another element; as the entire element is in contact with, overlaps, etc. with at least a portion of another element; or as at least a portion of the element is in contact with, overlaps, etc. with all of another element.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] The term "or" means an inclusive or rather than an exclusive or. That is, 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".

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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. In addition, for ease of description, the proportions, dimensions, sizes, and thicknesses of each element illustrated in the drawings may be different from the actual proportions, dimensions, sizes, and thicknesses, and therefore, aspects of the present disclosure are not limited to the proportions, dimensions, sizes, and thicknesses illustrated in the drawings.

[0135] Figure 1 is a perspective view illustrating a sound device according to one aspect of the present disclosure. Figure 2 According to one aspect of the present disclosure, Figure 1 A cross-sectional view taken along line II′.

[0136] Reference Figure 1 and Figure 2 , the sound device according to one aspect of the present disclosure can be implemented or realized as at least one of the following: a display device, an electronic device, a sound device, a sound output device, a vibration device, a vibration generating device, a sound bar, a sound system, a sound device for an electronic device, a sound device for a display, a sound device for a vehicle device (or a transportation device), or a sound bar for a vehicle device (or a transportation device). For example, the vehicle device (or transportation device) may include a vehicle, a train, a ship, a mobile device, or an airplane, but the aspects of the present disclosure are not limited thereto. In addition, the sound device according to one aspect of the present disclosure may be implemented or realized as an analog sign or a digital sign, such as a billboard, a poster, or a bulletin board.

[0137] The sound device according to one aspect of the present disclosure may include a vibration member 100 and a vibration device 500 .

[0138] The vibration member 100 may generate vibration or output sound (or sound waves) based on the displacement (or driving) of the vibration device 500. The vibration member 100 may be a vibration object, a sign panel, a passive vibration plate, a front member, a vibration panel, a sound panel, a passive vibration panel, a sound output plate, a sound vibration plate, etc., but aspects of the present disclosure are not limited thereto.

[0139] The vibration member 100 according to one aspect of the present disclosure may include a polygonal shape, including a rectangular shape or a square shape, but aspects of the present disclosure are not limited thereto. The vibration member 100 may include a lateral length parallel to the first direction X and a longitudinal length parallel to the second direction Y. For example, for the same plane, the first direction X may be a first horizontal direction or a first horizontal length direction of the vibration member 100, and the second direction Y may be a second horizontal direction or a second horizontal length direction of the vibration member 100 that is orthogonal or substantially orthogonal to the first direction X.

[0140] The vibration member 100 according to one aspect of the present disclosure may include an integral structure having the same thickness, but aspects of the present disclosure are not limited thereto. For example, the vibration member 100 may include a plate structure having the same thickness throughout its structure, but aspects of the present disclosure are not limited thereto. For example, the vibration member 100 may include a non-planar structure having a convex portion and / or a concave portion.

[0141] According to one aspect of the present disclosure, the vibration member 100 may include a first surface 100a and a second surface 100b. In the vibration member 100, the first surface 100a may be a front surface, a front-facing surface, a top surface, or an upper surface. The second surface 100b may be a rear surface, a rear-facing surface, a back surface, a back surface, a bottom surface, or a lower surface.

[0142] According to one aspect of the present disclosure, the vibration member 100 may be implemented or realized as a signage panel (such as, analog signage, digital signage, etc.), such as an advertising sign, a poster, a bulletin board, etc. For example, when the vibration member 100 may be implemented as a signage panel, the analog signage may include signage content, such as sentences, pictures, and logos, etc. The signage content may be set at the vibration member 100 to be visible or visual. For example, the signage content may be attached to one or more of the first surface 100a and the second surface 100b of the vibration member 100. For example, the signage content may be directly attached to the first surface 100a of the vibration member 100. For example, the signage content may be printed on a medium such as paper, and the medium on which the signage content is printed may be directly attached to the first surface 100a of the vibration member 100. For example, when the signage content is attached to the first surface 100a of the vibration member 100, the vibration member 100 may be configured as a transparent material.

[0143] The vibration member 100 according to one aspect of the present disclosure may include two or more materials. The vibration member 100 may include a multilayer structure including different materials. For example, the vibration member 100 may include two or more members including two or more different materials. The vibration member 100 may include a central portion and an outer portion including different materials. For example, the vibration member 100 may be configured to have a core-shell structure. For example, the vibration member 100 may have a core-shell structure with different materials.

[0144] The vibration device 500 may be configured to vibrate the vibration member 100. The vibration device 500 may be disposed or constructed at the vibration member 100. The vibration device 500 may be configured to vibrate (or displace or drive) based on a drive signal (or electrical signal, which may convey an electrical voice signal or a sound wave signal) applied thereto, so as to vibrate (or displace or drive) the vibration member 100. For example, the vibration device 500 may be one or more of an active vibration member, a vibration generator, a vibration structure, a vibrator, a vibration generating device, a sound generator, a sound device, a sound generating structure, or a sound generating device, but aspects of the present disclosure are not limited thereto.

[0145] The vibration device 500 according to one aspect of the present disclosure may include a piezoelectric material or an electroactive material having piezoelectric properties. The vibration device 500 may vibrate (or shift or drive) autonomously based on the vibration (or displacement or drive) of the piezoelectric material based on the driving signal applied to the piezoelectric material, or may vibrate (or shift or drive) the vibration member 100, etc. The vibration device 500 may alternately and repeatedly contract and / or expand based on the piezoelectric effect (or piezoelectric properties) to vibrate (or shift or drive). For example, the vibration device 500 may vibrate (or shift or drive) in a third direction Z (e.g., a vertical direction or a thickness direction) as it alternately and repeatedly contracts and / or expands through the inverse piezoelectric effect.

[0146] The vibration device 500 according to an aspect of the present disclosure may include a quadrilateral shape having a first length parallel to the first direction X and a second length parallel to the second direction Y. For example, the vibration device 500 may include a square shape in which the first length is the same as the second length, but aspects of the present disclosure are not limited thereto. The vibration device 500 may have a relatively smaller size (or area) than the vibration member 100.

[0147] The sound device according to an aspect of the present disclosure may further include a connection member 400 .

[0148] The connecting member 400 may be disposed or connected between the vibration device 500 and the vibration member 100. The connecting member 400 may be disposed between the vibration device 500 and the vibration member 100, and connect or couple the vibration device 500 to the vibration member 100. For example, the vibration device 500 may be connected or coupled to the vibration member 100 through the connecting member 400. For example, the vibration device 500 may be connected to or supported by the second surface 100b of the vibration member 100 through the connecting member 400, but aspects of the present disclosure are not limited thereto. For example, the connecting member 400 may be a first connecting member, a first coupling member, or a first bonding member, but aspects of the present disclosure are not limited thereto.

[0149] The connection member 400 according to one aspect of the present disclosure may include an adhesive layer (or viscous layer) suitable for providing an attachment force or an adhesive force. For example, the connection member 400 may be configured to include a material that includes an adhesive layer suitable for providing an attachment force or an adhesive force for each of the second surfaces 100b of the vibration device 500 and the vibration member 100. For example, the connection member 400 may include a foam pad, a double-sided tape, a double-sided foam pad, a double-sided foam tape, an adhesive, a double-sided adhesive, a double-sided adhesive tape, a double-sided adhesive foam pad, an adhesive sheet, etc., but aspects of the present disclosure are not limited thereto. For example, when the connection member 400 includes an adhesive sheet (or adhesive layer), the connection member 400 may include only an adhesive layer or an adhesive layer, without including a base member such as a plastic material.

[0150] The adhesive layer of the connecting member 400 according to one aspect of the present disclosure may include a pressure sensitive adhesive (PSA), an optically clear adhesive (OCA), an optically clear resin (OCR), an epoxy resin, an acrylic resin, a silicone resin, or a polyurethane resin, etc., but aspects of the present disclosure are not limited thereto. For example, the adhesive layer of the connecting member 400 may include an acrylic-based substance (or material) having the following properties: relatively better adhesion and higher hardness. Therefore, the transmission efficiency of the vibration force (or displacement force) transmitted from the vibration device 500 to the vibration member 100 can be increased.

[0151] The sound apparatus according to an aspect of the present disclosure may further include a supporting member 300 .

[0152] The support member 300 may be configured or disposed at the rear surface or surface of the vibration member 100. The support member 300 may be configured or disposed at the second surface 100b of the vibration member 100. The support member 300 may be configured to support the outer peripheral portion of the second surface 100b of the vibration member 100. The support member 300 may be configured to support the outer peripheral portion of the rear surface of the vibration member 100. The support member 300 may be configured to cover the vibration device 500 and the second surface 100b of the vibration member 100.

[0153] The support member 300 according to one aspect of the present disclosure may include an internal space 300S surrounding the second surface 100b of the vibration member 100. For example, the support member 300 may include a box shape in which one side (or a part or upper side or upper part) of the internal space 300S is open. For example, the support member 300 may be a support member, a shell, a shell, a shell member, a shell member, a housing, a housing member, a cabinet, a package, a sealing member, a sealing cap, a sealing box, a sound box, a accommodating member, a storage member, etc., but aspects of the present disclosure are not limited thereto. For example, the internal space 300S of the support member 300 may be a accommodating space, a storage space, a gap space, an air space, a vibration space, a sound space, a sound box, a sealed space, a resonance space, etc., but aspects of the present disclosure are not limited thereto.

[0154] The support member 300 according to one aspect of the present disclosure may include one or more of a metal material and a non-metal material (or a composite non-metal material), but the aspects of the present disclosure are not limited thereto. For example, the support member 300 may include one or more of a metal material, plastic, and wood, but the aspects of the present disclosure are not limited thereto.

[0155] The support member 300 according to an aspect of the present disclosure may include a first support portion 310 and a second support portion 330 .

[0156] The first support portion 310 may be arranged in parallel with the vibration member 100. The first support portion 310 may be arranged to face the second surface 100b of the vibration member 100, and may span the same direction as the vibration member 100 (e.g., the first direction X and the second direction Y). The first support portion 310 may be arranged to cover the second surface 100b of the vibration member 100. The first support portion 310 may be spaced apart from the second surface 100b of the vibration member 100. For example, the first support portion 310 may be spaced apart from the second surface 100b of the vibration member 100, with an internal space 300S therebetween. For example, the first support portion 310 may be a bottom, a bottom plate, a support plate, a housing plate, a housing bottom, etc., but aspects of the present disclosure are not limited thereto.

[0157] The second support portion 330 may be configured or disposed at the outer peripheral portion of the vibration member 100. The second support portion 330 may be connected to the outer peripheral portion of the first support portion 310. For example, the second support portion 330 may include a structure bent from the outer peripheral portion of the first support portion 310. For example, the second support portion 330 may be parallel to the third direction Z (e.g., Figure 1 and Figure 2 The second support portion 330 may be a lateral portion, a side wall, a supporting side wall, a housing lateral surface, a housing side wall, etc., but aspects of the present disclosure are not limited thereto.

[0158] The second support portion 330 may be integrated into the first support portion 310. For example, the first support portion 310 and the second support portion 330 may be integrated (or constructed) as one body (monobody), and thus, the inner space 300S surrounded by the second support portion 330 may be disposed above the first support portion 310. Therefore, the support member 300 may include a box shape in which one side (or a portion or an upper side or an upper portion) is opened by the first support portion 310 and the second support portion 330.

[0159] The supporting member 300 may be connected or coupled to the vibration member 100 through the coupling member 200. The supporting member 300 may be connected or coupled to the second surface 100b of the vibration member 100 through the coupling member 200. For example, the supporting member 300 may be connected or coupled to the peripheral portion of the second surface 100b of the vibration member 100 through the coupling member 200. For example, the second supporting portion 330 may be connected or coupled to the vibration member 100 through the coupling member 200. For example, the second supporting portion 330 may be connected or coupled to the second surface 100b of the vibration member 100 through the coupling member 200. For example, the second supporting portion 330 may be connected or coupled to the peripheral portion of the second surface 100b of the vibration member 100 through the coupling member 200.

[0160] The coupling member 200 may be configured to minimize, reduce or prevent the vibration of the vibration member 100 from being transmitted to the support member 300. The coupling member 200 may include material properties suitable for preventing vibration. For example, the coupling member 200 may include a material having elasticity. For example, the coupling member 200 may include a material having elasticity to absorb vibration (or absorb shock). The coupling member 200 according to an aspect of the present disclosure may be configured as (or include) a polyurethane material and / or a polyolefin material, but the aspects of the present disclosure are not limited thereto. For example, the coupling member 200 may include one or more of an adhesive, a double-sided adhesive, a double-sided tape, a double-sided foam tape, a double-sided foam pad and a double-sided buffer tape, but the aspects of the present disclosure are not limited thereto.

[0161] The coupling member 200 according to an aspect of the present disclosure can prevent or reduce physical contact (or friction) between the vibration member 100 and the second support portion 330 of the support member 300, thereby preventing or reducing the occurrence of noise (or noise sound) due to physical contact (or friction) between the vibration member 100 and the support member 300. For example, the coupling member 200 may be a buffer member, an elastic member, a damping member, a vibration absorbing member, a vibration-proof member, or a vibration-blocking member, but aspects of the present disclosure are not limited thereto.

[0162] The coupling member 200 according to another aspect of the present disclosure may be configured to minimize, reduce, or prevent the vibration of the vibration member 100 from being transferred to the supporting member 300 , and reduce reflection of incident sound waves that may be generated based on the vibration of the vibration member 100 .

[0163] The coupling member 200 according to another aspect of the present disclosure may include a first coupling member 210 and a second coupling member 230 .

[0164] The first coupling member 210 may be disposed between the vibration member 100 and the support member 300. The first coupling member 210 may be disposed between the vibration member 100 and the second support portion 330 of the support member 300. The first coupling member 210 may be disposed or coupled between the rear peripheral portion of the vibration member 100 and the second support portion 330. For example, the first coupling member 210 may be disposed inwardly (or toward the interior of the sound device) from the second coupling member 230. The first coupling member 210 may be configured to have a hardness smaller than that of the second coupling member 230, for example, a (elastic) modulus or a Young's modulus (or elastic modulus). For example, the first coupling member 210 may include a double-sided polyurethane tape, a double-sided polyurethane foam tape, a double-sided sponge tape, etc., but aspects of the present disclosure are not limited thereto.

[0165] The second coupling member 230 may be disposed between the vibration member 100 and the support member 300. For example, the second coupling member 230 may be disposed between the vibration member 100 and the support member 300 to surround the first coupling member 210. The second coupling member 230 may be disposed or coupled between the rear peripheral portion of the vibration member 100 and the second support portion 330 of the support member 300. For example, the second coupling member 230 may be disposed or coupled between the rear peripheral portion of the vibration member 100 and the second support portion 330 of the support member 300 to surround the first coupling member 210. For example, the second coupling member 230 may be disposed outward (or toward the outside of the sound device) from the first coupling member 210. The second coupling member 230 may be configured to have a greater hardness than the hardness of the first coupling member 210, for example, a (elastic) modulus or a Young's modulus (or elastic modulus). For example, the second coupling member 230 may include a double-sided polyolefin tape, a double-sided polyolefin foam tape, a double-sided acrylic tape, a double-sided acrylic foam tape, etc., but aspects of the present disclosure are not limited thereto.

[0166] The coupling member 200 according to another aspect of the present disclosure can absorb incident sound waves that can be generated based on the vibration of the vibration member 100. For example, the first coupling member 210, which is relatively soft and is arranged inward from the relatively rigid (or harder) second coupling member 230, can absorb incident sound waves, which can be generated based on the vibration of the vibration member 100. Therefore, the sound (or wave) generated by reflection from the coupling member 200 can be minimized or attenuated. Therefore, the flatness of the sound pressure level generated based on the vibration of the vibration member 100 can be reduced. For example, the flatness of the sound pressure level can be the deviation amplitude between the highest sound pressure level and the lowest sound pressure level within the tone vocal band generated based on the vibration of the vibration member 100.

[0167] In the coupling member 200 according to another aspect of the present disclosure, the relatively hard second coupling member 230 can be arranged to be inward (or toward the inside of the sound device) from the relatively soft (or softer than the second coupling member 230) first coupling member 210. Therefore, the sound pressure level in the specific tone vocal cord of the sound can be reduced. For example, the sound pressure level in the vocal cord of 2kHz to 5kHz and 7kHz to 12kHz can be reduced due to the reflected sound (or reflected wave or standing wave) generated by the reflection from the relatively hard second coupling member 230. Therefore, when the sound pressure level in the vocal cord of 2kHz to 5kHz and 7kHz to 12kHz needs to be reduced based on the shape and size of the vibration member 100, the relatively hard second coupling member 230 can be arranged to be inward from the relatively soft first coupling member 210. In this way, based on the sound pressure level reduction in the vocal cord of 2kHz to 5kHz and 7kHz to 12kHz generated by the second coupling member 230, the flatness of the sound pressure level can be improved.

[0168] According to the vibration of the vibration member 100 based on the vibration of the vibration device 500, the sound device according to one aspect of the present disclosure can generate (or output) sound. The sound device according to one aspect of the present disclosure can generate (or output) sound based on the vibration of the vibration member 100. Here, the vibration member 100 may include a plurality of plates constructed of materials different from each other. As a result, the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal band (or low-pitched frequency) can be enhanced.

[0169] Figure 3 A vibration member according to an aspect of the present disclosure is illustrated. Figure 3 is a diagram illustrating a vibration device according to one aspect of the present disclosure and Figure 2 A cross-sectional view of a portion of a vibrating member is shown.

[0170] Reference Figure 2 and Figure 3 , the vibration member 100 according to one aspect of the present disclosure may include an inner member 110 and an outer member 120. For example, the vibration member 100 may include an inner member 110 and an outer member 120 surrounding the inner member 110. For example, the outer member 120 may be configured to surround all surfaces of the inner member 110. For example, when the inner member 110 has an upper surface, a lower surface, and a side surface, the outer member 120 may be configured to surround the entire upper surface, the lower surface, and the side surface of the inner member 110. The outer member 120 may be configured to surround the entire upper surface, the lower surface, and the side surface of the inner member 110. For example, the outer member 120 may directly contact (or be coupled to) all surfaces of the inner member 110. For example, the outer member 120 may directly contact (or be coupled to) all surfaces of the inner member 110 without an intermediary. For example, the inner member 110 may be inserted (or embedded) into the interior of the outer member 120, so that the inner member 110 and the outer member 120 may be integrated into one.

[0171] According to one aspect of the present disclosure, the vibration member 100 may include a core-shell structure through the inner member 110 and the outer member 120. For example, in the vibration member 100 having the core-shell structure, the inner member 110 may correspond to the core, and the outer member 120 may correspond to the shell. For example, the inner member 110 may be a first member, an embedded member, a core member, a center member, a plate, an inner plate, a plate member, a hard member, a hard plate, or a rigid plate, but is not limited thereto. For example, the outer member 120 may be a second member, an outer member, a shell member, a protective member, a coating member, an outer plate, a flexible member, an elastic member, a flexible plate, or an elastic plate, but is not limited thereto.

[0172] According to one aspect of the present disclosure, the inner member 110 and the outer member 120 may include different materials. For example, the inner member 110 and the outer member 120 may have different stiffnesses. For example, the inner member 110 and the outer member 120 may have different densities. For example, the inner member 110 and the outer member 120 may have different moduli or Young's moduli. For example, the inner member 110 and the outer member 120 may differ from each other in any one or more aspects of stiffness, density, and modulus.

[0173] According to one aspect of the present disclosure, the inner member 110 may include a metal material. For example, the inner member 110 may include a metal material including aluminum Al. For example, the inner member 110 may include a metal material having a density of 1.7 g / cm 3 Up to 2.8g / cm 3 (or can be adjusted to 2.0g / cm 3 Up to 2.5g / cm 3 , or 2.25g / cm 3 For example, the inner member 110 may include a material having a modulus in the range of 1 GPa (gigapascal) to 100 GPa (or may be adjusted to 30 GPa to 70 GPa, or 55 GPa).

[0174] According to one aspect of the present disclosure, the outer member 120 may include a soft material having a ductile property. For example, the outer member 120 may have a relatively lower stiffness or a relatively lower modulus than the inner member 110. For example, the outer member 120 may reduce the valley portion and the peak portion of the sound generated by the vibration of the vibration device 500 through the ductile property. For example, the outer member 120 may reduce the valley phenomenon and the peak phenomenon in the sound generated by the vibration of the vibration device 500 through the ductile property. For example, the modulus of the outer member 120 according to one aspect of the present disclosure may be in the range of 2GPa to 10GPa (or may be adjusted to 4GPa to 8GPa, or 6GPa). For example, the outer member 120 may include a plastic material. For example, the outer member 120 may include an epoxy resin. For example, the density of the outer member 120 may be 1.2g / cm 3 Up to 1.4g / cm 3 (Or it can be adjusted to 1.3g / cm 3 ) within the range of .

[0175] According to an aspect of the present disclosure, the outer member 120 may be configured to vibrate according to the vibration of the vibration device 500. The outer member 120 may be connected or coupled to the vibration device 500 through the connection member 400. The connection member 400 may be arranged or connected between the vibration device 500 and the first outer member 121 of the vibration member 100. For example, the vibration device 500 may be connected or coupled to the second surface 100b of the outer member 120 of the vibration member 100 via the connection member 400.

[0176] The vibration device 500 may vibrate the outer member 120, thereby vibrating the vibration member 100. For example, the vibration device 500 may vibrate the inner member 110 by vibrating the outer member 120. Therefore, the vibration member 100 may generate (or output) sound through the vibrations of the outer member 120 and the inner member 110.

[0177] For example, if the vibration member 100 includes only a metal material, it is difficult to achieve lightweight in the vibration member 100 due to thickness and weight, and defects such as surface corrosion may occur in the vibration member 100 under high temperature and humid environments. If the vibration member 100 includes only a plastic material, it is easy to achieve lightweight in the vibration member 100. However, in the case where the vibration member 100 includes only a plastic material, a bending phenomenon may occur in the vibration member 100 after a reliability test, so that defects such as cracks may be generated in the vibration device 500, and a deviation in total sound pressure may be generated according to the material strength of the vibration member 100.

[0178] According to an aspect of the present disclosure, the vibration member 100 includes an inner member 110 including a metal material and an outer member 120 including a plastic material, and the outer member 120 is configured to surround the entire surface of the inner member 110. Therefore, the sound device according to an aspect of the present disclosure can prevent or reduce corrosion from occurring on the surface of the vibration member 100, and can prevent cracks from occurring in the vibration device 500 by preventing or reducing a bending phenomenon of the vibration member 100.

[0179] According to an aspect of the present disclosure, the outer member 120 may include a first outer member 121 and a second outer member 123. The inner member 110 may be configured between the first outer member 121 and the second outer member 123. The first outer member 121 and the second outer member 123 may be sequentially stacked, and the inner member 110 may be interposed therebetween. For example, the area of ​​each of the first outer member 121 and the second outer member 123 may be greater than the area (or size) of the inner member 110.

[0180] According to an aspect of the present disclosure, the thickness T3 and T2 of each of the first outer member 121 and the second outer member 123 may be smaller than the thickness T1 of the inner member 110. For example, in a region (or portion) where the first outer member 121, the second outer member 123, and the inner member 110 are vertically (or up and down) stacked or overlapped with each other, the thickness T3 and T2 of each of the first outer member 121 and the second outer member 123 may be smaller than the thickness T1 of the inner member 110. For example, the thickness T3 and T2 of the central portion of each of the first outer member 121 and the second outer member 123 overlapping or stacked with the inner member 110 may be smaller than the thickness T1 of the inner member 110.

[0181] The first outer member 121 may be configured to surround or cover the first surface (or lower surface) of the inner member 110. The first outer member 121 may be configured to surround or cover the entire first surface (or lower surface) of the inner member 110 and the lower portion of the side surface of the inner member 110. For example, the entire first surface (or lower surface) of the inner member 110 and the lower portion of the side surface of the inner member 110 may be configured to be inserted into (or accommodated in) a portion of the first outer member 121. Therefore, the entire first surface (or lower surface) of the inner member 110 and the lower portion of the side surface of the inner member 110 may contact (or be coupled) with the first outer member 121, or may directly contact (or be coupled) without an intermediary.

[0182] According to an aspect of the present disclosure, the first outer member 121 may include a first surface adjacent to the inner member 110 and a second surface opposite to the first surface.

[0183] The first surface of the first outer member 121 may include a groove 121g for receiving the entire first surface (or lower surface) of the inner member 110 and a lower portion of the side surface of the inner member 110. The groove 121g of the first outer member 121 may have a size corresponding to that of the inner member 110.

[0184] The second surface of the first outer member 121 may be connected (or coupled) to the vibration device 500. The second surface of the first outer member 121 may be configured as a flat surface or a flattened surface, but is not limited thereto.

[0185] The second outer member 123 may be configured to surround or cover the second surface (or upper surface) of the inner member 110. The second outer member 123 may be configured to surround or cover the entire second surface (or upper surface) of the inner member 110 and the upper portion of the side surface of the second surface (or upper surface). For example, the entire second surface (or upper surface) of the inner member 110 and the upper portion of the side surface of the inner member 110 may be configured to be inserted into (or accommodated in) a portion of the second outer member 123. Therefore, the entire second surface (or upper surface) of the inner member 110 and the upper portion of the side surface of the inner member 110 may contact (or be coupled) with the second outer member 123, or may directly contact (or be coupled) without an intermediary.

[0186] According to an aspect of the present disclosure, the second outer member 123 may include a first surface adjacent to the inner member 110 and a second surface opposite to the first surface.

[0187] The first surface of the second outer member 123 may include a groove 123g for receiving the entire second surface (or upper surface) of the inner member 110 and an upper portion of the side surface of the inner member 110. The groove 123g of the second outer member 123 may have a size corresponding to that of the inner member 110.

[0188] The second surface of the second outer member 123 may be configured as a flat surface or a flattened surface, but is not limited thereto.

[0189] Each of the first outer member 121 and the second outer member 123 may include a first area A1 and a second area A2. The first area A1 of each of the first outer member 121 and the second outer member 123 may be in contact with (or coupled to) the inner member 110. The second area A2 of each of the first outer member 121 and the second outer member 123 may be configured to surround the side surface of the inner member 110. The second area A2 of each of the first outer member 121 and the second outer member 123 may be connected (or coupled) to each other. For example, the second area A2 of each of the first outer member 121 and the second outer member 123 may be directly connected (or coupled) to each other without an intermediary. When the first outer member 121 and the second outer member 123 include the same material, the second areas A2 of the corresponding first outer member 121 and the second outer member 123 may be combined with each other to form a layer (or a material). Therefore, the inner member 110 may be completely surrounded by the first outer member 121 and the second outer member 123. For example, when each of the first and second outer members 121 and 123 includes a plastic material, each of the second area A2 of the first and second outer members 121 and 123 may be melted and combined with each other.

[0190] The sound device according to one aspect of the present disclosure can generate (or output) sound by the vibration member 100 vibrating according to the vibration of the vibration device 500. The sound device according to one aspect of the present disclosure generates (or outputs) sound according to the vibration of the vibration member 100, and the vibration member 100 includes an inner member 110 and an outer member 120 including different materials, so that the sound characteristics and / or sound pressure characteristics can be improved, and as the vibration width (or displacement width) of the vibration member 00 increases due to the ductility of the outer member 120, the peak phenomenon and the valley phenomenon in the entire vocal cord can be reduced, thereby improving the sound pressure flatness and sound quality of the sound device.

[0191] Figure 4 A vibration device according to an aspect of the present disclosure is illustrated. Figure 5 According to one aspect of the present disclosure, Figure 4 A cross-sectional view taken along line II-II′. Figure 6 According to one aspect of the present disclosure, Figure 4 A cross-sectional view taken along line III-III′. Figures 4 to 6 The above reference is illustrated Figures 1 to 3 An example of a vibration device is described.

[0192] Reference Figures 4 to 6 , a vibration device 500 according to an aspect of the present disclosure may include a vibration generating part 510 .

[0193] The vibration generating part 510 may include a piezoelectric material having piezoelectric properties. The vibration generating part 510 may be configured as a ceramic-based piezoelectric material for achieving relatively strong vibrations; or may be configured as a piezoelectric ceramic having a perovskite-based crystal structure. For example, the vibration generating part 510 may be a vibration generating device, a vibration film, a vibration generating film, a vibrator, a vibration generator, an active vibrator, an active vibration generator, an actuator, an exciter, a membrane actuator, a membrane exciter, an ultrasonic actuator, an active vibration member, etc., but aspects of the present disclosure are not limited thereto.

[0194] The vibration generating part 510 according to an aspect of the present disclosure may include a vibration part 511 .

[0195] The vibration part 511 may be configured to vibrate in response to a driving signal of a piezoelectric effect. The vibration part 511 may include at least one or more of a piezoelectric inorganic material and a piezoelectric organic material. For example, the vibration part 511 may be a vibration element, a piezoelectric device, a piezoelectric element, a piezoelectric device part, a piezoelectric device layer, a piezoelectric structure, a piezoelectric vibration part, or a piezoelectric vibration layer, but aspects of the present disclosure are not limited thereto.

[0196] The vibration part 511 according to an aspect of the present disclosure may include a vibration layer 511 a , a first electrode layer 511 b , and a second electrode layer 511 c .

[0197] The vibration layer 511a may include an electroactive material or a piezoelectric material having a piezoelectric effect. For example, a piezoelectric material may have the following characteristics: when pressure or distortion is applied to a crystal structure by an external force, a potential difference occurs due to dielectric polarization caused by a change in the relative positions of positive (+) ions and negative (-) ions, thereby generating vibrations through an electric field based on a reverse voltage applied thereto. For example, the vibration layer 511a may be a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric composite layer, a piezoelectric composite, a piezoelectric ceramic composite, etc., but aspects of the present disclosure are not limited thereto.

[0198] The vibration layer 511a may be configured as a ceramic-based material for achieving relatively strong vibration (e.g., strong amplitude vibration), or may be configured as a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite-based crystal structure may have a piezoelectric effect and / or an inverse piezoelectric effect, and may be an oriented plate-like structure.

[0199] 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 aspects 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 / or titanium (Ti), or may include a lead zirconate nickel niobate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni) and / or niobium (Nb), but the aspects of the present disclosure are not limited thereto. For example, the vibration layer 511a 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 aspects of the present disclosure are not limited thereto.

[0200] The first electrode layer 511b may be disposed at a first surface (or upper surface or front surface) 511s1 of the vibration layer 511a. The first electrode layer 511b may have the same size as that of the vibration layer 511a or a size smaller than that of the vibration layer 511a.

[0201] The second electrode layer 511c may be disposed at a second surface (or lower surface or rear surface) 511s2 opposite to or different from the first surface 511s1 of the vibration layer 511a. The second electrode layer 511c may have the same size as that of the vibration layer 511a, or may have a size smaller than that of the vibration layer 511a. For example, the second electrode layer 511c may have the same or similar shape as that of the vibration layer 511a, but aspects of the present disclosure are not limited thereto.

[0202] According to an aspect of the present disclosure, in order to prevent or reduce an electrical short circuit between the first electrode layer 511b and the second electrode layer 511c, each of the first electrode layer 511b and the second electrode layer 511c may be formed at another portion of the vibration layer 511a except the peripheral portion. For example, the first electrode layer 511b may be formed at the entire first surface 511s1 of the vibration layer 511a except the peripheral portion. For example, the second electrode layer 511c may be formed at the entire second surface 511s2 of the vibration layer 511a except the peripheral portion. For example, the distance between the side surface (or side wall) of each of the first electrode layer 511b and the second electrode layer 511c and the side surface (or periphery, periphery or side wall) of the vibration layer 511a may be at least 0.5 mm or more. For example, the distance between the side surface of each of the first electrode layer 511b and the second electrode layer 511c and the side surface of the vibration layer 511a may be at least 1 mm or more, but aspects of the present disclosure are not limited thereto.

[0203] According to an aspect of the present disclosure, one or more of the first electrode layer 511b and the second electrode layer 511c may include a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material may include indium tin oxide (ITO) or indium zinc oxide (IZO), but the aspects of the present disclosure are not limited thereto. The opaque conductive material may include gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) including glass powder, etc., or may include an alloy thereof, but the aspects of the present disclosure are not limited thereto. For example, in order to enhance the electrical characteristics and / or vibration characteristics of the vibration layer 511a, each of the first electrode layer 511b and the second electrode layer 511c may include silver (Ag) having a low resistivity. For example, the carbon may include one or more of carbon black, ketjen black, carbon nanotubes, and a carbon material including graphite, but the aspects of the present disclosure are not limited thereto.

[0204] The vibration layer 511a may be polarized (or polarized) by a certain voltage applied to the first electrode layer 511b and the second electrode layer 511c in a certain temperature atmosphere or in a temperature atmosphere that can be changed from high temperature to room temperature, but aspects of the present disclosure are not limited thereto. For example, the polarization direction (or polarization direction) formed in the vibration layer 511a may be formed or oriented (or arranged) from the first electrode layer 511b to the second electrode layer 511c, but is not limited thereto, and the polarization direction (or polarization direction) formed in the vibration layer 511a may be formed or oriented (or arranged) from the second electrode layer 511c to the first electrode layer 511b.

[0205] The vibration layer 511a can contract and / or expand alternately and repeatedly to vibrate due to the inverse piezoelectric effect according to the driving signal applied from the outside to the first electrode layer 511b and the second electrode layer 511c. For example, the vibration layer 511a can vibrate in the vertical direction (or thickness direction) and the planar direction by the signal applied to the first electrode layer 511b and the second electrode layer 511c. The vibration layer 511a can be displaced (or vibrated or driven) by contraction and / or expansion in the planar direction, thereby improving the sound characteristics and / or sound pressure level characteristics of the vibration generating portion 510.

[0206] The vibration generating part 510 according to an aspect of the present disclosure may further include a cover member 513 .

[0207] The cover member 513 may be configured to cover at least one or more of the first surface and the second surface of the vibration part 511. The cover member 513 may be configured to protect at least one or more of the first surface and the second surface of the vibration part 511. For example, the first surface of the vibration part 511 may be a front surface or a top surface. For example, the second surface of the vibration part 511 may be a back surface, a rear surface, or a bottom surface opposite to the first surface.

[0208] The cover member 513 according to an aspect of the present disclosure may include a first cover member 513 a .

[0209] The first cover member 513a may be disposed at the first surface of the vibration part 511. For example, the first cover member 513a may be configured to cover the first electrode layer 511b of the vibration part 511. For example, the first cover member 513a may be configured to have a larger size than the vibration part 511. The first cover member 513a may be configured to protect the first surface of the vibration part 511 and the first electrode layer 511b.

[0210] The first cover member 513a according to an aspect of the present disclosure may include an adhesive layer. For example, the first cover member 513a may include a base film, and an adhesive layer disposed on the base film and connected or coupled to the first surface of the vibration part 511. For example, the adhesive layer may include an electrically insulating material that can be compressed and decompressed and has adhesiveness.

[0211] The first cover member 513a according to another aspect of the present disclosure may be connected to or coupled to the first surface of the vibration portion 511 via the first adhesive layer 513b. For example, the first cover member 513a may be connected to or coupled to the first surface of the vibration portion 511 or the first electrode layer 511b via the first adhesive layer 513b. For example, the first cover member 513a may be connected to or coupled to the first surface of the vibration portion 511 or the first electrode layer 511b via the first adhesive layer 513b through a film lamination process. The first adhesive layer 513b may be configured to surround the entire first surface of the vibration portion 511 and a portion of the side surface of the vibration portion 511.

[0212] The cover member 513 according to an aspect of the present disclosure may further include a second adhesive layer 513 c .

[0213] The second adhesive layer 513c may be disposed on the second surface of the vibration part 511. For example, the second adhesive layer 513c may be configured to cover the second electrode layer 511c of the vibration part 511. The second adhesive layer 513c may be configured to protect the second surface of the vibration part 511 and the second electrode layer 511c. The second adhesive layer 513c may be configured to surround the entire second surface of the vibration part 511 and a portion of the side surface of the vibration part 511. For example, the second adhesive layer 513c may be a protective layer or a protective member.

[0214] The second adhesive layer 513c may be connected to or coupled to the first adhesive layer 513b at the side surface of the vibration part 511 or the edge (or periphery) of the first cover member 513a. Therefore, the first adhesive layer 513b and the second adhesive layer 513c may be configured to surround or completely surround the vibration part 511. The first adhesive layer 513b and the second adhesive layer 513c may be configured to cover or surround all surfaces of the vibration part 511. For example, the vibration part 511 may be inserted (or accommodated) or buried (or embedded) in the interior of the adhesive layer including the first adhesive layer 513b and the second adhesive layer 513c.

[0215] The cover member 513 may be Figure 2 and Figure 3 The connecting member 400 is shown to be connected or coupled to the vibration member 100. For example, any one of the first cover member 513a and the second adhesive layer 513c may be connected to the vibration member 100 via Figure 2 and Figure 3 The connecting member 400 is shown connected or coupled to the vibration member 100 .

[0216] The cover member 513 according to an aspect of the present disclosure may further include a second cover member 513 d , but is not limited thereto.

[0217] The second cover member 513d may be disposed on the second surface of the vibration part 511. For example, the second cover member 513d may be configured to cover the second electrode layer 511c of the vibration part 511. For example, the second cover member 513d may be configured to have a larger size than the vibration part 511, and may be configured to have the same size as the first cover member 513a. The second cover member 513d may be configured to protect the second surface of the vibration part 511 and the second electrode layer 511c.

[0218] Each of the first cover member 513a and the second cover member 513d may include the same material or different materials. For example, each of the first cover member 513a and the second cover member 513d may be or include a polyimide film or a polyethylene terephthalate film, but aspects of the present disclosure are not limited thereto.

[0219] The second cover member 513d may be connected or coupled to the second surface of the vibration part 511 or the second electrode layer 511c through the second adhesive layer 513c. For example, the second cover member 513d may be connected or coupled to the second surface of the vibration part 511 or the second electrode layer 511c through a film lamination process via the second adhesive layer 513c.

[0220] The vibration part 511 may be disposed or inserted (or accommodated) between the first cover member 513a and the second cover member 513d. For example, the vibration part 511 may be inserted (or accommodated) or embedded (or received) in an adhesive layer including the first adhesive layer 513b and the second adhesive layer 513c.

[0221] Each of the first adhesive layer 513b and the second adhesive layer 513c according to an aspect 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 513b and the second adhesive layer 513c may include epoxy resin, acrylic resin, silicone resin, polyurethane resin, pressure sensitive adhesive PSA, optically clear adhesive OCA or optically clear resin OCR, but the present disclosure is not limited thereto.

[0222] The first adhesive layer 513b and the second adhesive layer 513c may be configured between the first cover member 513a and the second cover member 513d to surround the vibration part 511. For example, one or more of the first adhesive layer 513b and the second adhesive layer 513c may be configured to surround the vibration part 511.

[0223] Any one of the first cover member 513a and the second cover member 513d may be Figure 2 and Figure 3 The connecting member 400 is shown connected or coupled to the vibration member 100 .

[0224] The vibration device 500 or the vibration generating part 510 according to an aspect of the present disclosure may each further include a signal supply member 550 .

[0225] The signal supply member 550 may be configured to supply a driving signal supplied from the driving circuit part to the vibration part 511. The signal supply member 550 may be configured to be electrically connected to the vibration part 511. The signal supply member 550 may be configured to be electrically connected to the first electrode layer 511b and the second electrode layer 511c.

[0226] A portion of the signal supply member 550 may be accommodated (or inserted) between the cover member 513 and the vibration part 511. For example, a portion of the signal supply member 550 may be accommodated (or inserted) between the first cover member 513a and the first surface of the vibration part 511. For example, a portion of the signal supply member 550 may be accommodated (or inserted) between the first cover member 513a and the second cover member 513d.

[0227] According to an aspect of the present disclosure, an end portion (or a distal portion or one side or a portion) of the signal supply member 550 may be disposed or inserted (or accommodated) between one edge portion (or one peripheral portion) of the first cover member 513a and the vibration portion 511. For example, an end portion (or a distal portion or one side or a portion) of the signal supply member 550 may be disposed or inserted (or accommodated) between one edge portion (or one peripheral portion) of the first cover member 513a and the first surface of the vibration portion 511.

[0228] The end portion (or distal portion or one side or part) of the signal supply member 550 can be set or inserted (or accommodated) between an edge portion (or one peripheral portion) of the first cover member 513a and an edge portion (or one peripheral portion) of the second cover member 513d. An edge portion of the first cover member 513a and an edge portion of the second cover member 513d can accommodate or vertically (or up and down) cover the end portion (or distal portion or one side or part) of the signal supply member 550. Therefore, the signal supply member 550 can be constructed (or integrated) as one body with the vibration generating part 510. For example, the signal supply member 550 can be configured as a signal cable, 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 multi-layer printed circuit, or a flexible multi-layer printed circuit board, but aspects of the present disclosure are not limited thereto.

[0229] The signal supply member 550 according to an aspect of the present disclosure may include a base member 551 and a plurality of signal lines 553a and 553b. For example, the signal supply member 550 may include a base member 551, a first signal line 553a, and a second signal line 553b.

[0230] The base member 551 may include a transparent or opaque plastic material, but aspects of the present disclosure are not limited thereto. The base member 551 may have a certain width along a first direction X, and may extend longer along a second direction Y intersecting the first direction X.

[0231] The first signal line 553a and the second signal line 553b may be disposed at the first surface of the base member 551 in parallel with the second direction Y, and may be spaced apart from or electrically separated from each other along the first direction X. The first signal line 553a and the second signal line 553b may be disposed in parallel with each other at the first surface of the base member 551. For example, the first signal line 553a and the second signal line 553b may be implemented in a line shape by patterning a metal layer (or a conductive layer) formed or deposited at the first surface of the base member 551.

[0232] End portions (or distal end portions or one side or a portion) of the first signal line 553a and the second signal line 553b may be separated from each other and thus may be individually curved or bent.

[0233] The end portion (or distal portion or one side or part) of the first signal line 553a may be electrically connected to the first electrode layer 511b of the vibration part 511. For example, the end portion of the first signal line 553a may be electrically connected to at least a portion of the first electrode layer 511b of the vibration part 511 at or near one edge portion of the first cover member 513a. For example, the end portion (or distal portion or one side or part) of the first signal line 553a may be directly electrically connected to at least a portion of the first electrode layer 511b of the vibration part 511. For example, the end portion (or distal portion or one side or part) of the first signal line 553a may be electrically connected to or directly contact the first electrode layer 511b of the vibration part 511. For example, the end portion of the first signal line 553a may be electrically connected to the first electrode layer 511b by a conductive double-sided tape. Therefore, the first signal line 553a may be configured to transmit the first drive signal supplied from the vibration driver to the first electrode layer 511b of the vibration part 511.

[0234] The end portion (or distal portion or one side or a portion) of the second signal line 553b may be electrically connected to the second electrode layer 511c of the vibration part 511. For example, the end portion of the second signal line 553b may be electrically connected to at least a portion of the second electrode layer 511c of the vibration part 511 at an edge portion of the second cover member 513d. For example, the end portion of the second signal line 553b may be directly electrically connected to at least a portion of the second electrode layer 511c of the vibration part 511. For example, the end portion of the second signal line 553b may be electrically connected to or directly contact the second electrode layer 511c of the vibration part 511. For example, the end portion of the second signal line 553b may be electrically connected to the second electrode layer 511c of the vibration part 511 through a conductive double-sided tape. Therefore, the second signal line 553b may be configured to transmit the second drive signal supplied from the vibration driver to the second electrode layer 511c of the vibration part 511.

[0235] The signal supply member 550 according to an aspect of the present disclosure may further include an insulating layer 555 .

[0236] The insulating layer 555 may be provided at the first surface of the base member 551 to cover each of the first signal line 553 a and the second signal line 553 b except for an end portion (or one side or a portion) of the signal supply member 550 .

[0237] According to one aspect of the present disclosure, an end portion (or one side or a portion) of the signal supply member 550, including an end portion (or one side or a portion) 555a of the base member 551 and the insulating layer 555, may be inserted (or accommodated) between the first cover member 513a and the second cover member 513d, and may be fixed between the first cover member 513a and the second cover member 513d by the first adhesive layer 513b and the second adhesive layer 513c. Therefore, the end portion (or one side or a portion) of the first signal line 553a may remain electrically connected to the first electrode layer 511b of the vibration portion 511, and the end portion (or one side or a portion) of the second signal line 553b may remain electrically connected to the second electrode layer 511c of the vibration portion 511. In addition, an end portion (or one side or a portion) of the signal supply member 550 can be inserted (or accommodated) and fixed between the vibration portion 511 and the first cover member 513a, thereby preventing or reducing contact defects between the vibration generating portion 510 and the signal supply member 550 caused by movement of the signal supply member 550.

[0238] In the signal supply member 550 according to one aspect of the present disclosure, each of the end portion (or one side or a portion) 555a of the base member 551 and the end portion (or one side or a portion) 555a of the insulating layer 555 may be removed. For example, each of the end portion of the first signal line 553a and the end portion of the second signal line 553b may be exposed to the outside (for example, beside the end of the vibration part 511), instead of being supported or covered by each of the end portion (or one side) 555a of the base member 551 and the end portion (or one side or a portion) 555a of the insulating layer 555, respectively. For example, the end portion of each of the first signal line 553a and the second signal line 553b may protrude (or extend) from the end portion 551e of the base member 551 or the end portion 555e of the insulating layer 555 to have a certain length. Therefore, each of the end portion (or distal portion or one side or a portion) of each of the first signal line 553a and the second signal line 553b may be curved (or bent) individually or independently.

[0239] An end portion (or one side or a portion) of the first signal line 553a that is not supported by an end portion (or one side or a portion) of the base member 551 and an end portion 555a of the insulating layer 555 may be directly connected to or directly contact the first electrode layer 511b of the vibration portion 511. An end portion (or one side or a portion) of the second signal line 553b that is not supported by an end portion (or one side or a portion) of the base member 551 and an end portion 555a of the insulating layer 555 may be directly connected to or directly contact the second electrode layer 511c of the vibration portion 511.

[0240] According to one aspect of the present disclosure, a portion of the signal supply member 550 or a portion of the base member 551 may be disposed or inserted (or accommodated) between the cover member 513 and the vibration part 511, and thus, the signal supply member 550 may be constructed (or integrated) as one with the vibration device 500. For example, a portion of the signal supply member 550 or a portion of the base member 551 may be disposed or inserted (or accommodated) between the first cover member 513a and the second cover member 513d, and thus, the signal supply member 550 may be constructed (or integrated) as one with the vibration generating part 510. Therefore, the vibration generating part 510 and the signal supply member 550 may be configured as one component (or element or one assembly), and thus, a single material effect may be obtained.

[0241] According to an aspect of the present disclosure, the first signal line 553a and the second signal line 553b of the signal supply member 550 may be integrally constructed (or integrated) with the vibration generating part 510, and thus, a welding process for electrical connection between the vibration generating part 510 and the signal supply member 550 may not be required. Therefore, the manufacturing process and structure of the vibration device 500 may be simplified, thereby avoiding the cost, time, and danger associated with the welding process.

[0242] Figure 7 A vibration layer according to another aspect of the present disclosure is illustrated. Figure 7 The above reference is illustrated Figures 4 to 6 Another example of a vibration layer is described in Example.

[0243] Reference Figure 4 and Figure 7 According to another aspect of the present disclosure, the vibration layer 511a may include a plurality of first portions 511a1 and a plurality of second portions 511a2. For example, the plurality of first portions 511a1 and the plurality of second portions 511a2 may be alternately and repeatedly arranged along a first direction X (eg, X direction) or a second direction Y (eg, Y direction).

[0244] Each of the plurality of first portions 511a1 may include an inorganic material portion having a piezoelectric effect (or piezoelectric properties). For example, each of the plurality of first portions 511a1 may include at least one or more of a piezoelectric inorganic material and a piezoelectric organic material. For example, each of the plurality of first portions 511a1 may be an inorganic portion, an inorganic material portion, a piezoelectric portion, a piezoelectric material portion, or an electroactive portion, but aspects of the present disclosure are not limited thereto.

[0245] According to an aspect of the present disclosure, each of the plurality of first portions 511a1 may have a first width W1 parallel to the first direction X (or the second direction Y), and may extend along the second direction Y (or the first direction X). Each of the plurality of first portions 511a1 may include the same Figures 4 to 6 The vibration layer 511a is made of substantially the same material as described in the example, and thus, its repeated description is omitted or may be briefly discussed.

[0246] Each of the plurality of second portions 511a2 may be disposed between the plurality of first portions 511a1. For example, each of the plurality of first portions 511a1 may be disposed between two adjacent second portions 511a2 in the plurality of second portions 511a2. Each of the plurality of second portions 511a2 may have a second width W2 parallel to the first direction X (or the second direction Y), and may extend along the second direction Y (or the first direction X). The first width W1 may be the same as or different from the second width W2. For example, the first width W1 may be greater than the second width W2. For example, the first portion 511a1 and the second portion 511a2 may include a line shape or a strip shape having the same size or different sizes. For example, the first portion 511a1 and the second portion 511a2 may be shaped as a line or strip having the same size or different sizes.

[0247] Each of the plurality of second parts 511a2 may be configured to fill a gap between two adjacent first parts in the plurality of first parts 511a1. Each of the plurality of second parts 511a2 may be configured to fill a gap between two adjacent first parts in the plurality of first parts 511a1, and therefore, may be connected to or attached to the side surface of the first part 511a1 adjacent thereto. In this way, the first part 511a1 and the second part 511a2 may be alternately arranged as strips. According to one aspect of the present disclosure, each of the plurality of first parts 511a1 and the plurality of second parts 511a2 may be arranged (or arranged) in parallel to each other in the same plane (or the same layer). Therefore, the vibration layer 511a may be extended to a desired size or length by the lateral connection (or connection) of the first part 511a1 and the second part 511a2.

[0248] According to an aspect of the present disclosure, each of the plurality of second parts 511a2 can absorb the impact applied to the first part 511a1, so that the overall durability of the first part 511a1 can be enhanced, and flexibility is provided to the vibration layer 511a. Each of the plurality of second parts 511a2 may include an organic material having an extension (e.g., soft and / or elastic) property. For example, each of the plurality of second parts 511a2 may include one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but aspects of the present disclosure are not limited thereto. For example, each of the plurality of second parts 511a2 may be an organic part, an organic material part, an adhesive part, a stretching part, a bending part, a damping part, or an extension (e.g., soft and / or elastic) part, but aspects of the present disclosure are not limited thereto.

[0249] A first surface of each of the plurality of first portions 511a1 and the plurality of second portions 511a2 may be commonly connected to the first electrode layer 511b. A second surface of each of the plurality of first portions 511a1 and the plurality of second portions 511a2 may be commonly connected to the second electrode layer 511c.

[0250] The plurality of first portions 511a1 and the plurality of second portions 511a2 may be disposed on (or connected to) the same plane, and thus the vibration layer 511a according to another aspect of the present disclosure may have a single film type. Therefore, the vibration generating portion 510 or the vibration portion 511 including the vibration layer 511a according to another aspect of the present disclosure may vibrate through the first portion 511a1 having vibration characteristics, and may be bent into a curved shape through the second portion 511a2 having flexibility.

[0251] Figure 8 A vibration layer according to another aspect of the present disclosure is illustrated. Figure 8 The above reference is illustrated Figures 4 to 6Another example of a vibration layer (e.g., 511a) is described in the example.

[0252] Reference Figure 4 and Figure 8 , the vibration layer 511 a according to another aspect of the present disclosure may include a plurality of first portions 511 a 3 and a second portion 511 a 4 disposed between the plurality of first portions 511 a 3 .

[0253] Each of the plurality of first portions 511a3 may be arranged to be spaced apart from each other along each of the first direction X and the second direction Y. For example, each of the plurality of first portions 511a3 may have a hexahedral shape (e.g., a cube shape) of the same size, and may be arranged in a lattice shape, but aspects of the present disclosure are not limited thereto. In an example, from a top view, each first portion 511a3 may have a square shape. For example, each of the plurality of first portions 511a3 may have a circular plate, an elliptical plate, or a polygonal plate having the same size as each other, but aspects of the present disclosure are not limited thereto.

[0254] Each of the plurality of first portions 511a3 may include the same Figure 7 The first part 511a1 of the example description is substantially the same material, and therefore, its repeated description is omitted or its repeated description may be briefly discussed.

[0255] The second portion 511a4 may be disposed between the plurality of first portions 511a3 along each of the first direction X and the second direction Y. The second portion 511a4 may be configured to fill a gap between two adjacent first portions 511a3 or surround each of the plurality of first portions 511a3, and thus, the second portion 511a4 may be connected to or attached to the first portion 511a3 adjacent thereto. Figure 8 As shown, the first portions 511a3 are arranged in rows and columns, and the second portions 511a4 surround all such first portions 511a3, and this configuration may be referred to herein as a lattice configuration. The second portions 511a4 may include the same Figure 7 The second portion 511a2 of the example description is substantially the same material, and therefore, its repeated description is omitted or its repeated description may be briefly discussed.

[0256] A first surface of each of the plurality of first portions 511a3 and second portions 511a4 may be commonly connected to the first electrode layer 511b. A second surface of each of the plurality of first portions 511a3 and second portions 511a4 may be commonly connected to the second electrode layer 511c.

[0257] A plurality of first portions 511a3 and second portions 511a4 may be disposed on (or connected to) the same plane, and thus the vibration layer 511a according to another aspect of the present disclosure may have a single film type. Therefore, the vibration portion 511 according to another aspect of the present disclosure or the vibration generating portion 510 including the vibration layer 511a may vibrate through the first portion 511a3 having vibration characteristics, and may be bent into a curved shape through the second portion 511a4 having flexibility.

[0258] Fig. 9 A vibration device according to another aspect of the present disclosure is illustrated. Fig. 9 The above reference is illustrated Figures 1 to 3 The example described is another example of a vibration device or multiple vibration generating devices.

[0259] Reference Figure 2 and Fig. 9 , the vibration device 500 according to another aspect of the present disclosure may include two or more vibration generating parts 510 - 1 and 510 - 2. For example, the vibration device 500 may include a first vibration generating part 510 - 1 and a second vibration generating part 510 - 2.

[0260] The first vibration generating part 510-1 and the second vibration generating part 510-2 can overlap or stack each other to shift (or drive or vibrate) in the same direction to maximize or increase the amplitude displacement of the vibration device 500. For example, the first vibration generating part 510-1 and the second vibration generating part 510-2 can have substantially the same size, but aspects of the present disclosure are not limited thereto. For example, the first vibration generating part 510-1 and the second vibration generating part 510-2 can have substantially the same size within the error range of the manufacturing process. Therefore, the first vibration generating part 510-1 and the second vibration generating part 510-2 can maximize or increase the amplitude displacement of the vibration device 500.

[0261] According to an aspect of the present disclosure, any one of the first vibration generating unit 510-1 and the second vibration generating unit 510-2 can be Figure 2 The connection member 400 is shown connected or coupled to the vibration member 100. For example, the first vibration generating part 510-1 may be connected or coupled to the vibration member 100 through the connection member 400.

[0262] Each of the first vibration generating part 510 - 1 and the second vibration generating part 510 - 2 may be the same as that described above. Figures 4 to 6 The vibration generating portion 510 described in the example is the same or substantially the same as that of the embodiment, and thus, the same reference numerals refer to similar elements, and a repeated description thereof is omitted or may be briefly discussed.

[0263] The vibration device 500 according to another aspect of the present disclosure may further include an intermediate adhesive member 510M.

[0264] The intermediate adhesive member 510M may be disposed or connected between the first vibration generating part 510-1 and the second vibration generating part 510-2. According to one aspect of the present disclosure, the intermediate adhesive member 510M may be disposed or connected between the second adhesive layer 513c of the first vibration generating part 510-1 and the first cover member 513a of the second vibration generating part 510-2. According to another aspect of the present disclosure, the intermediate adhesive member 510M may be disposed or connected between the second cover member 513d of the first vibration generating part 510-1 and the first cover member 513a of the second vibration generating part 510-2. For example, the intermediate adhesive member 510M may be an intermediate member, an adhesive member, or a connecting member, but aspects of the present disclosure are not limited thereto.

[0265] The intermediate adhesive member 510M according to one aspect of the present disclosure may be configured as a material including an adhesive layer, which has good adhesive force or attachment force for each of the first vibration generating part 510-1 and the second vibration generating part 510-2. For example, the intermediate adhesive member 510M may include a foam pad, a double-sided tape, a double-sided foam tape, a double-sided foam pad, a double-sided tape, an adhesive, etc., but the aspects of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate adhesive member 510M may include an epoxy resin, an acrylic resin, a silicone resin, or a polyurethane resin, but the aspects of the present disclosure are not limited thereto. For example, the adhesive layer of the intermediate adhesive member 510M may include a polyurethane-based material (or substance) having relatively ductile (e.g., soft and / or elastic) properties. Therefore, the adhesive layer can minimize or reduce the vibration loss caused by the displacement interference between the first vibration generating part 510-1 and the second vibration generating part 510-2, so that each of the first vibration generating part 510-1 and the second vibration generating part 510-2 can be freely and independently displaced (or driven or vibrated).

[0266] The vibration device 500 according to another aspect of the present disclosure may include a first vibration generating part 510-1 and a second vibration generating part 510-2 that are stacked (or overlapped or stacked) to vibrate (or shift or drive) in the same direction, so that the displacement amount or amplitude displacement can be maximized or increased. Therefore, the displacement amount (or bending force or driving force) or displacement amplitude of the vibration member can be maximized or increased.

[0267] Fig.10 The density of the internal member according to the experimental example is illustrated. Fig.11 The modulus of the internal member according to the experimental example is illustrated. Figure 3 The example describes the density and modulus of the internal components.

[0268] The inventors of the present disclosure prepared samples in Experimental Examples 1 to 4 to construct materials suitable for internal components. The inventors of the present disclosure manufactured the internal components of Experimental Examples 1 to 4 by using SUS, aluminum, copper, and brass, and prepared the sound devices of Experimental Examples 1 to 4 by combining the internal components with a vibration device and a supporting member. The thickness of each internal component of Experimental Examples 1 to 4 was 0.3 mm, and the vertical and horizontal lengths of each internal component were 30 cm, the thickness ratio of the vibration device and the internal component was 0.55, and the area ratio of the vibration device and the internal component was 0.08. For example, the thickness ratio of the vibration device and the internal component is defined as a value obtained by dividing the thickness of the vibration device by the thickness of the internal component. For example, the area ratio of the vibration device and the internal component is defined as a value obtained by dividing the area of ​​the vibration device by the area of ​​the internal component. Fig.10 and Fig.11 , Experimental Examples 1 to 4 are represented by #1 to #4, respectively.

[0269] Reference Fig.10 , the density of Experimental Example 1 (or SUS) is 7.93 g / cm 3 , the density of Experimental Example 2 (or aluminum) is 2.69 g / cm 3 , the density of Experimental Example 3 (or copper) is 8.93 g / cm 3 , while the density of Experimental Example 4 (or brass) is 8.73 g / cm 3 Therefore, it can be confirmed that the densities of Experimental Examples 3 and 4 are similar, and the density of Experimental Example 2 is relatively low.

[0270] Reference Fig.11 , the modulus of Experimental Example 1 (or SUS) is 200 GPa, the modulus of Experimental Example 2 (or aluminum) is 70 GPa, the modulus of Experimental Example 3 (or copper) is 130 GPa, and the modulus of Experimental Example 4 (or brass) is 110 GPa. Therefore, it can be confirmed that the moduli of Experimental Examples 3 and 4 are similar, and the modulus of Experimental Example 2 is relatively low.

[0271] Table 1 below shows average sound pressure level SPL (dB) characteristics for each frequency (Hz) in the sound apparatus including the internal members according to Experimental Examples 1 to 4.

[0272] [Table 1]

[0273]

[0274] Referring to Table 1, the average sound pressure level SPL (dB) of each frequency (Hz) of the sound device including the internal member including SUS according to Experimental Example 1 was measured as 77.65 dB from 0.15 kHz to 20 kHz, 75.72 dB from 0.15 kHz to 10 kHz, 77.60 dB from 0.3 kHz to 0.8 kHz, 77.59 dB from 1 kHz to 10 kHz, 81.07 dB from 2 kHz to 4 kHz, and 76.60 dB from 0.15 kHz to 8 kHz. Therefore, it can be verified that the sound pressure characteristics of Experimental Example 1 are lower than those of Experimental Example 2, and higher than those of Experimental Examples 3 and 4. The average sound pressure level SPL (dB) of each frequency (Hz) of the sound device including the inner member including aluminum according to Experimental Example 2 was measured to be 83.58 dB from 0.15 kHz to 20 kHz, 78.92 dB from 0.15 kHz to 10 kHz, 84.76 dB from 0.3 kHz to 0.8 kHz, 85.82 dB from 1 kHz to 10 kHz, 85.10 dB from 2 kHz to 4 kHz, and 82.36 dB from 0.15 kHz to 8 kHz. Therefore, in the case of the sample including aluminum of Experimental Example 2, it can be confirmed that a higher sound pressure characteristic is represented compared with other experimental examples.

[0275] The average sound pressure level SPL (dB) of each frequency (Hz) of the sound device including the copper internal member of Experimental Example 3 was measured as 74.82 dB from 0.15kHz to 20kHz, 70.63 dB from 0.15kHz to 10kHz, 75.39 dB from 0.3kHz to 0.8kHz, 76.15 dB from 1kHz to 10kHz, 71.19 dB from 2kHz to 4kHz, and 73.34 dB from 0.15kHz to 8kHz. Therefore, Experimental Example 3 shows that the sound pressure value is lower than Experimental Examples 1 and 2, and the sound pressure characteristics are similar to those of Experimental Example 4.

[0276] The average sound pressure level SPL (dB) of each frequency (Hz) of the sound device including the brass inner member of Experimental Example 4 was measured to be 73.90 dB from 0.15 kHz to 20 kHz, 71.98 dB from 0.15 kHz to 10 kHz, 75.65 dB from 0.3 kHz to 0.8 kHz, 73.85 dB from 1 kHz to 10 kHz, 73.78 dB from 2 kHz to 4 kHz, and 72.66 dB from 0.15 kHz to 8 kHz. Therefore, Experimental Example 4 shows the following sound pressure characteristics: its sound pressure value is lower than that of Experimental Examples 1 and 2, and is similar to that of Experimental Example 3.

[0277] Therefore, refer to Fig.10 and Fig.11 As shown in Table 1, the inventors of the present disclosure confirm that compared with other materials, including those with a density of 1.7 g / cm 3 Up to 2.8g / cm 3 The inner components of materials in the range and with a modulus of 1 GPa to 100 GPa have higher sound pressure characteristics.

[0278] Fig.12 The sound pressure characteristics of the acoustic device according to the experimental example are illustrated.

[0279] The inventors of the present disclosure prepared samples of Experimental Examples 5, 6, and 7 by differently arranging the structure of the vibration component to form a material suitable for an outer component. The vibration component of Experimental Example 5 includes only an inner component, while each of the vibration components of Experimental Examples 6 and 7 includes an inner component and an outer component. In each experimental example, SUS is used for the inner component, polyethylene terephthalate PET is used for the outer component of Experimental Example 6, and epoxy resin is used for the outer component of Experimental Example 7. In Experimental Example 5, the thickness of the inner component is 0.5 mm, each horizontal length and vertical length of the vibration component is 30 cm, and the thickness ratio of the vibration device and the inner component is 0.33, and the area ratio of the vibration device and the inner component is 0.08. The thickness of the inner component of each of Experimental Examples 6 and 7 is 0.5 mm, the thickness of the outer component is 0.15 mm, each horizontal length and vertical length of the vibration member is 30 cm, the thickness ratio of the vibration device and the vibration component is 0.25, and the area ratio of the vibration device and the vibration component is 0.12. Fig.12 In the figure, the dotted line is the sound pressure characteristic of Experimental Example 5, the thin solid line is the sound pressure characteristic of Experimental Example 6, and the thick solid line is the sound pressure characteristic of Experimental Example 7. For example, the density of PET (polyethylene terephthalate) and epoxy resin are 1.1 g / cm 3 and 1.21.1g / cm 3 , while the moduli are 2.0 GPa and 2.4 GPa respectively.

[0280] Reference Fig.12 , at a frequency of 0.1 kHz or less, Experimental Examples 6 and 7 present sound pressure characteristics lower than that of Experimental Example 5. However, at a frequency exceeding 0.1 kHz, it can be seen that the sound pressure characteristics of Experimental Example 7 present the same level as that of Experimental Example 5.

[0281] Table 2 below shows characteristics of average sound pressure levels SPL (dB) at respective frequencies (Hz) of acoustic devices including vibration members according to Experimental Examples 5, 6, and 7.

[0282] [Table 2]

[0283]

[0284] Referring to Table 2, the average sound pressure level SPL of each frequency (Hz) of the sound device configured to surround the inner member by the outer member including PET of Experimental Example 6 was measured as 72.46dB at 0.15kHz to 8kHz (dB), and was measured as 73.41dB at 0.15kHz to 20kHz. Therefore, it can be seen that the sound pressure characteristics of Experimental Example 6 are about 2dB lower than the sound pressure characteristics of Experimental Example 5. The average sound pressure level SPL (dB) of each frequency Hz of the sound device configured to surround the inner member by the outer member including epoxy resin of Experimental Example 7 was measured as 73.51dB at 0.15kHz to 8kHz, and was measured as 74.40dB at 0.15kHz to 20kHz. Therefore, it can be seen that the sound pressure characteristics of Experimental Example 7 are similar to those of Experimental Example 5, and are higher than those of Experimental Example 6.

[0285] Therefore, if an outer member configured to surround an inner member is provided and a density of 1.2 g / cm 3 Up to 1.4g / cm 3 If the outer member is provided by a material with a modulus of 2 GPa to 10 GPa within the range of, the inventors of the present disclosure can provide the following sound device, which can prevent cracks from being generated in the vibration device by preventing bending of the vibration member while maintaining the sound pressure characteristics of the vibration device, and can prevent rust from being generated on the surface of the vibration member under high temperature and high humidity conditions.

[0286] Fig.13 The sound output characteristics of the sound device according to the experimental example are illustrated.

[0287] The inventors of the present disclosure prepared samples in Experimental Examples 8 and 9 to compare the sound pressure characteristics of the sound device according to the area ratio of the vibration member to the vibration device. The vibration member of Experimental Examples 8 and 9 includes an inner member and an outer member. Here, SUS is used for the inner member, and epoxy resin is used for the outer member. In Experimental Examples 8 and 9, the thickness of the inner member is 0.3 mm, the thickness of the outer member is 0.15 mm, and the thickness ratio of the inner member to the outer member is 0.33. In Experimental Example 8, each of the horizontal length and the vertical length of the vibration member is 30 cm, and the area ratio of the vibration device to the vibration member is 0.08. In Experimental Example 9, the horizontal length and the vertical length of the vibration member are 20 cm and 30 cm, respectively, and the area ratio of the vibration device to the vibration member is 0.12. Fig.13 , the thin solid line represents the sound pressure characteristics of Experimental Example 8, and the thick solid line represents the sound pressure characteristics of Experimental Example 9.

[0288] Table 3 below shows average sound pressure level SPL (dB) characteristics at respective frequencies (Hz) in devices including the vibration members of Experimental Examples 8 and 9.

[0289] [Table 3]

[0290]

[0291] Reference Fig.13 As shown in Table 3, the average sound pressure level SPL (dB) of each frequency (Hz) of the sample with each horizontal and vertical length of 30 cm and 30 cm of the vibration member of Experimental Example 8 is measured at 0.15 kHz to 20 kHz as 75.14 dB, at 0.15 kHz to 10 kHz as 74.43 dB, at 0.3 kHz to 0.8 kHz as 77.16 dB, at 1 kHz to 10 kHz as 74.54 dB, at 2 kHz to 4 kHz as 77.37 dB, and at 0.15 kHz to 8 kHz as 74.39 dB. The size of the vibration member is not limited to the content of the present disclosure.

[0292] The average sound pressure level SPL (dB) of each frequency (Hz) of the sample with each horizontal and vertical length of 20 cm and 30 cm of the vibration member of Experimental Example 9 was measured to be 71.47 dB at 0.15 kHz to 20 kHz, 63.56 dB at 0.15 kHz to 10 kHz, 68.18 dB at 0.3 kHz to 0.8 kHz, 74.45 dB at 1 kHz to 10 kHz, 70.18 dB at 2 kHz to 4 kHz, and 68.55 dB at 0.15 kHz to 8 kHz. The size of the vibration member is not limited to the content of the present disclosure.

[0293] According to Experimental Examples 8 and 9, the sound pressure characteristics of Experimental Examples 8 and 9 are 75.14 dB and 71.47 dB at 0.15 kHz to 20 kHz, and thus it can be confirmed that the sound pressure characteristics of Experimental Example 8 are high. However, the sound pressure characteristics of Experimental Examples 8 and 9 are 74.45 dB and 74.45 dB at 1 kHz to 10 kHz, respectively, and thus it can be confirmed that the sound pressure characteristics of Experimental Examples 8 and 9 are similar. In addition, as Fig.13 As shown, it can be confirmed that the flatness of the graph of Experimental Example 9 is excellent in the range of 1kHz to 10kHz. Therefore, in the case of Experimental Example 9, it can be confirmed that the valley portion and the peak portion of the sound generated according to the vibration are reduced compared with Experimental Example 8. According to one aspect of the present disclosure, it can be confirmed that the sound pressure characteristics of each frequency of Experimental Example 8 are high, but the sound pressure flatness in the range of 1kHz to 10kHz is high in Experimental Example 9.

[0294] Therefore, the inventors of the present disclosure can confirm that when the area ratio of the vibration device and the vibration member is adjusted to a range of 0.08 to 0.12 (or can be adjusted to 0.09 to 0.11, or 0.10), the sound pressure characteristics of the sound device are maintained, and the sound pressure flatness and sound quality are improved by reducing the valleys and / or peaks at 1kHz to 10kHz.

[0295] Fig.14 A sound output characteristic of a sound device according to an aspect of the present disclosure is illustrated.

[0296] The inventors of the present disclosure prepared samples according to Aspect 1 and Aspect 2 to compare the sound pressure characteristics of the acoustic device according to the areas of the vibration member and the vibration device when the inner member includes an aluminum material.

[0297] The vibration component of Aspect 1 and Aspect 2 includes an inner component and an outer component. Here, aluminum is used for the inner component, and epoxy resin is used for the outer component. In Aspect 1 and Aspect 2, the thickness of the inner component is 0.3 mm, the thickness of the outer component is 0.15 mm, and the thickness ratio of the inner component to the outer component is 0.33. In Aspect 1, the horizontal length and the vertical length of the vibration component are 30 cm and 30 cm, respectively, and the area ratio of the vibration device and the vibration component is 0.08. In Aspect 2, the horizontal length and the vertical length of the vibration component are 20 cm and 30 cm, respectively, and the area ratio of the vibration device and the vibration component is 0.12. Fig.14 , the thin solid line represents the sound pressure characteristics of aspect 1, and the thick solid line represents the sound pressure characteristics of aspect 2.

[0298] Table 4 below shows average sound pressure level SPL characteristics at each frequency (Hz) of the acoustic device including the vibration members of Aspect 1 and Aspect 2.

[0299] [Table 4]

[0300]

[0301] Reference Fig.14 As shown in Table 4, the average sound pressure level SPL (dB) at each frequency (Hz) of the sound device including the vibration component of Aspect 1 is measured as 80.93dB at 0.15kHz to 20kHz, 77.80dB at 0.15kHz to 10kHz, 82.88dB at 0.3kHz to 0.8kHz, 81.59dB at 1kHz to 10kHz, 81.75dB at 2kHz to 4kHz, and 79.62dB at 0.15kHz to 8kHz.

[0302] The average sound pressure level SPL (dB) at each frequency Hz of the sound device including the vibration component of Aspect 2 is measured as 78.09 dB at 0.15kHz to 20kHz, 71.65 dB at 0.15kHz to 10kHz, 77.49 dB at 0.3kHz to 0.8kHz, 81.07 dB at 1kHz to 10kHz, 79.04 dB at 2kHz to 4kHz, and 76.31 dB at 0.15kHz to 8kHz.

[0303] According to one aspect of the present disclosure, the sound pressure characteristics of aspect 1 and aspect 2 are 80.93 dB and 78.09 dB at 0.15 kHz to 20 kHz, thereby confirming that the sound pressure characteristics of aspect 1 are high. In addition, according to one aspect of the present disclosure, the sound pressure characteristics of aspect 1 and aspect 2 are 81.59 dB and 81.07 dB at 1 kHz to 10 kHz, respectively, thereby confirming that the sound pressure characteristics of aspect 1 and aspect 2 are similar.

[0304] Reference Fig.14 , at 1kHz to 10kHz, it can be confirmed that the flatness of the graph of aspect 2 is greater than that of aspect 1. Therefore, in the case of aspect 2, it can be confirmed that the valley part and the peak part of the sound generated according to the vibration are reduced compared with aspect 1. According to an aspect of the present disclosure, it can be confirmed that the sound pressure characteristics of each frequency are high in aspect 1, but at 1kHz to 10kHz, according to the reduction of the valley phenomenon and the peak phenomenon, the sound pressure flatness and the sound quality are high in aspect 2.

[0305] Therefore, the inventors of the present disclosure can confirm that when the area ratio of the vibration device and the vibration member is adjusted to be within the range of 0.08 to 0.12, the sound pressure characteristics of the sound device are maintained, and the sound pressure flatness and sound quality are improved by reducing the valley phenomenon and the peak phenomenon at 1kHz to 10kHz.

[0306] Fig.15 Sound output characteristics of a sound device according to an experimental example and an aspect of the present disclosure are illustrated.

[0307] The inventors of the present disclosure prepared samples of Experimental Example 2 and Aspect 1 to compare the sound pressure characteristics of the sound device according to the vibration member. The sound device including the internal member of Experimental Example 2 was prepared in the same manner as in Control Example 2 described in Reference Table 1. For example, Experimental Example 2 only includes the internal member, and aluminum is used for the internal member. In Experimental Example 2, the horizontal and vertical lengths of the vibration member are each 30 cm, the thickness ratio of the vibration device and the internal member is 0.55, and the area ratio of the vibration device and the internal member is 0.08. The vibration member of Aspect 1 is prepared in the same manner as in Control Example 2 described in Reference Table 1. Fig.14 The example is prepared in the same manner as described in aspect 1. Fig.15, the thin solid line represents the sound pressure characteristics of Experimental Example 2, and the thick solid line represents the sound pressure characteristics of Aspect 1.

[0308] Table 5 below shows average sound pressure level SPL (dB) characteristics at respective frequencies (Hz) of the acoustic apparatus including the vibration members of Experimental Example 2 and Aspect 1.

[0309] [Table 5]

[0310]

[0311] Reference Fig.15 As shown in Table 5, the average sound pressure level SPL (dB) of each frequency (Hz) of Experimental Example 2 is measured as 83.58 dB at 0.15 kHz to 20 kHz, 78.92 dB at 0.15 kHz to 10 kHz, 84.76 dB at 0.3 kHz to 0.8 kHz, 85.82 dB at 1 kHz to 10 kHz, 85.10 dB at 2 kHz to 4 kHz, and 82.36 dB at 0.15 kHz to 8 kHz. The average sound pressure level SPL (dB) at each frequency Hz of Aspect 1 was measured as 80.93dB at 0.15kHz to 20kHz, 77.80dB at 0.15kHz to 10kHz, 82.88dB at 0.3kHz to 0.8kHz, 81.59dB at 1kHz to 10kHz, 81.75dB at 2kHz to 4kHz, and 79.62dB at 0.15kHz to 8kHz.

[0312] According to one aspect of the present disclosure, it can be confirmed that the sound pressure characteristics of Experimental Example 2 are greater than the sound pressure characteristics of Aspect 1 at 0.15kHz to 20kHz. However, the difference in the sound pressure characteristics is not large. Fig.15 As shown, it can be confirmed that it has similar sound pressure characteristics.

[0313] Therefore, according to one aspect of the present disclosure, when constructing an inner component including a metal material and an outer component including an epoxy material surrounding the inner component, sound pressure characteristics similar to those of a vibration component including a metal material can be achieved, and corrosion of the inner component can be prevented, and cracks can be prevented from being generated in the vibration device due to bending of the inner component.

[0314] Table 6 below shows the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to the material of the internal member. In order to compare the average sound pressure level SPL (dB) characteristics of each frequency Hz according to the material of the internal member, samples of Aspect 1, Experimental Example 8, Experimental Example 10 and Experimental Example 11 were prepared. In Table 6, Aspect 1 was prepared in the same manner as Aspect 1 of Table 5, and the samples were prepared in the same manner as the reference Fig.13Experimental Example 8 was prepared in the same manner as Experimental Example 8 described in the example of Table 3. In Table 6, each of Experimental Example 10 and Experimental Example 11 includes an inner member including copper and an inner member including brass, wherein the inner member is inserted into the outer member, and the remaining conditions except for the material of the inner member are prepared in the same manner as Experimental Example 8. Therefore, a redundant description thereof will be omitted or may be briefly provided.

[0315] [Table 6]

[0316]

[0317] Referring to Table 6, the average sound pressure level SPL (dB) of each frequency (Hz) of the sound device including the internal components of Experimental Example 10 was measured to be 74.52 dB at 0.15 kHz to 20 kHz, 70.75 dB at 0.15 kHz to 10 kHz, 74.86 dB at 0.3 kHz to 0.8 kHz, 75.34 dB at 1 kHz to 10 kHz, 72.67 dB at 2 kHz to 4 kHz, and 73.06 dB at 0.15 kHz to 8 kHz. The average sound pressure level SPL (dB) at each frequency Hz of the sound device including the internal components of Experimental Example 11 was measured to be 72.91 dB at 0.15 kHz to 20 kHz, 71.22 dB at 0.15 kHz to 10 kHz, 74.31 dB at 0.3 kHz to 0.8 kHz, 71.93 dB at 1 kHz to 10 kHz, 71.88 dB at 2 kHz to 4 kHz, and 71.26 dB at 0.15 kHz to 8 kHz.

[0318] Referring to Table 6, in the sound device in which the vibration member including the inner member and the outer member is constructed, it can be confirmed that: according to the sound pressure characteristics of the material of the inner member, the highest sound pressure characteristics are shown in aspect 1 in which the inner member includes aluminum. In addition, in the sound device having the vibration member including the inner member and the outer member, it can be confirmed that according to the sound pressure characteristics of the material of the inner member, in the case of including aluminum similar to the case in which the vibration member is constructed only with a metal plate described in reference to Table 1, the highest sound pressure characteristics are shown.

[0319] Fig.16 Sound output characteristics of a sound device according to an experimental example and an aspect of the present disclosure are illustrated.

[0320] The inventors of the present disclosure prepared samples of Experimental Example 11 and Aspect 2 to compare the sound pressure characteristics of a vibration member configured to have an inner member including aluminum and an outer member surrounding the inner member. The vibration member of Experimental Example 11 includes only the inner member, and aluminum is used for the inner member. In Experimental Example 11, the thickness of the inner member is 0.3 mm, the corresponding horizontal and vertical lengths of the vibration member are 20 cm and 30 cm, the thickness ratio of the vibration device and the vibration member is 0.55, and the area ratio of the vibration device and the vibration member is 0.12. Compared with the reference Fig.14 The vibration member of aspect 2 is prepared in the same manner as described in aspect 2 of the example. Fig.16 In FIG. 1 , the thin solid line represents the sound pressure characteristics of Experimental Example 11, and the thick solid line represents the sound pressure characteristics of Aspect 2.

[0321] Table 7 below shows average sound pressure level SPL (dB) characteristics at respective frequencies (Hz) of the acoustic apparatus including the vibration members of Experimental Example 11 and Aspect 2.

[0322] [Table 7]

[0323]

[0324] according to Fig.16 As shown in Table 7, the average sound pressure level SPL (dB) of the sound device of the vibration member of Experimental Example 11 at each frequency (Hz) is measured to be 81.90 dB at 0.15 kHz to 20 kHz, 76.88 dB at 0.15 kHz to 10 kHz, 80.90 dB at 0.3 kHz to 0.8 kHz, 85.08 dB at 1 kHz to 10 kHz, 84.23 dB at 2 kHz to 4 kHz, and 80.97 dB at 0.15 kHz to 8 kHz. The average sound pressure level SPL (dB) at each frequency Hz of the sound device including the vibration component of aspect 2 is measured as 78.09 dB at 0.15kHz to 20kHz, 71.65 dB at 0.15kHz to 10kHz, 77.49 dB at 0.3kHz to 0.8kHz, 81.07 dB at 1kHz to 10kHz, 79.04 dB at 2kHz to 4kHz, and 76.31 dB at 0.15kHz to 8kHz.

[0325] According to one aspect of the present disclosure, it can be confirmed that the sound pressure characteristics of Experimental Example 11 are higher at 0.15kHz to 20kHz than those of Aspect 2. However, in Aspect 2, it can be confirmed that the valley portion and the peak portion of the sound generated according to the vibration are reduced compared with Experimental Example 11 at 0.15kHz to 20kHz.

[0326] Therefore, according to an aspect of the present disclosure, when an inner member and an outer member surrounding the inner member are configured, valley portions and peak portions of sound generated according to vibration are reduced, so that sound pressure flatness and sound quality can be improved.

[0327] Therefore, according to one aspect of the present disclosure, a sound device includes an inner component including a metal material, and an outer component including an epoxy material surrounding the inner component, thereby having sound pressure characteristics similar to those of a case where a vibration component including a metal material is used, preventing corrosion of the vibration component, and preventing or reducing the generation of cracks in the vibration device due to a bending phenomenon of the vibration component.

[0328] Table 8 below shows the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to the material of the internal member. The inventors of the present disclosure prepared samples of Aspect 2, Experimental Example 9, Experimental Example 12 and Experimental Example 13 to confirm the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to the material of the internal member.

[0329] In Table 8, Fig.14 Aspect 2 was prepared in the same manner as Aspect 2 of Table 4, and the Fig.13 Experimental Example 9 was prepared in the same manner as Experimental Example 9 described in the example of Table 3. In Table 8, corresponding Experimental Examples 12 and 13 include an inner member comprising copper and an inner member comprising brass, and the inner member is inserted into the outer member, and the remaining conditions except the material of the inner member are prepared in the same manner as the conditions in Experimental Example 9. In the aspects and experimental examples of Table 8, the area of ​​the vibration member is different from the area of ​​the vibration member of Table 6, and the remaining conditions are the same. Therefore, its redundant description will be omitted or can be briefly provided. The area or size of the vibration member is not limited to the contents of the present disclosure.

[0330] [Table 8]

[0331]

[0332] Referring to Table 8, the average sound pressure level SPL (dB) of each frequency (Hz) of Experimental Example 12 was measured to be 68.74dB at 0.15kHz to 20kHz, 63.67dB at 0.15kHz to 10kHz, 66.79dB at 0.3kHz to 0.8kHz, 66.99dB at 1kHz to 10kHz, 67.17dB at 2kHz to 4kHz, and 66.58dB at 0.15kHz to 8kHz. The average sound pressure level SPL (dB) at each frequency Hz of Experimental Example 13 was measured to be 69.97 dB at 0.15 kHz to 20 kHz, 62.90 dB at 0.15 kHz to 10 kHz, 65.87 dB at 0.3 kHz to 0.8 kHz, 72.01 dB at 1 kHz to 10 kHz, 66.47 dB at 2 kHz to 4 kHz, and 66.81 dB at 0.15 kHz to 8 kHz.

[0333] Referring to Table 8, in a sound device having a vibration member including an inner member and an outer member, it can be confirmed that the sound pressure characteristics according to the material of the inner member have the highest sound pressure characteristics when the inner member includes aluminum. Referring to Tables 6 and 8, in a sound device having a vibration member including an inner member and an outer member, it can be confirmed that the sound pressure characteristics according to the material of the inner member have the highest sound pressure characteristics regardless of the area of ​​the vibration member relative to the vibration device when the inner member includes aluminum.

[0334] Fig.17 The sound output characteristics of the sound device according to the experimental example are illustrated. The figure shows the sound output characteristics of the sound device including the vibration member including the plastic material.

[0335] The inventors of the present disclosure prepared samples of Aspect 2, Experimental Example 14, and Experimental Example 15 to compare the sound output characteristics of an acoustic device including a vibration member made of a plastic material and an aspect of the present disclosure. Fig.14 A device including a vibration component of Aspect 2 is prepared in the same manner as Aspect 2 described in the example of Table 4. The inventors of the present disclosure manufactured vibration components of Experimental Examples 14 and 15 by using polypropylene PP and polyamide-imide PAI, respectively, and prepared a sound device including the vibration components of Experimental Examples 14 and 15. In the vibration components according to Experimental Examples 14 and 15, the horizontal and vertical lengths are set to 20 cm and 30 cm, respectively, and the thickness thereof is prepared to be 0.3 mm. In the sound device including the vibration components according to Experimental Examples 14 and 15, the thickness ratio of the vibration device and the vibration component is 0.55, and the area ratio is 0.12. For example, the density of polypropylene PP is 0.9 g / cm 3 Up to 1.2g / cm 3, and the modulus of PP is 4.0GPa to 10.0GPa. For example, the density of polyamide-imide PAI is 1.4g / cm 3 , and the modulus of PAI is 4.0 GPa to 5.0 GPa.

[0336] Table 9 below shows average sound pressure level SPL (dB) characteristics at respective frequencies (Hz) of the sound devices including the vibration members according to Aspect 2, Experimental Example 14, and Experimental Example 15.

[0337] [Table 9]

[0338]

[0339] Referring to Table 9, the average sound pressure level SPL (dB) of each frequency (Hz) of Experimental Example 14 was measured to be 77.76 dB at 0.15 kHz to 20 kHz, 70.86 dB at 0.15 kHz to 10 kHz, 70.61 dB at 0.3 kHz to 0.8 kHz, 79.18 dB at 1 kHz to 10 kHz, 76.55 dB at 2 kHz to 4 kHz, and 74.85 dB at 0.15 kHz to 8 kHz. The average sound pressure level SPL (dB) at each frequency Hz of Experimental Example 15 was measured to be 75.44 dB at 0.15 kHz to 20 kHz, 67.52 dB at 0.15 kHz to 10 kHz, 71.35 dB at 0.3 kHz to 0.8 kHz, 77.02 dB at 1 kHz to 10 kHz, 75.83 dB at 2 kHz to 4 kHz, and 71.88 dB at 0.15 kHz to 8 kHz.

[0340] Reference Fig.17 As shown in Table 9, in Experimental Examples 14 and 15 using polypropylene PP and polyamide-imide PAI, respectively, the average sound pressure level SPL (dB) at each frequency Hz is high in Experimental Example 14, while the sound pressure flatness of the curve is high in Experimental Example 15. Therefore, the average sound pressure is high in polypropylene PP, while the sound pressure flatness is high in polyamide-imide PAI.

[0341] However, Experimental Examples 14 and 15, which respectively use polypropylene PP and polyamide-imide PAI, show lower average sound pressure characteristics and lower sound pressure flatness compared to Aspect 2. In addition, in the case of Experimental Examples 14 and 15, which respectively use polypropylene PP and polyamide-imide PAI, bending phenomenon occurs in the vibration member after the reliability test, and cracks are generated in the vibration device due to the bending phenomenon. The reliability test was performed at a temperature of 40°C to 85°C for 140 cycles.

[0342] Therefore, aspects of the present disclosure construct a vibration member including an inner member and an outer member surrounding the inner member, so that bending of the vibration member after reliability testing can be prevented or reduced, and cracks in the vibration device due to bending of the vibration member can be prevented or reduced.

[0343] Furthermore, aspects of the present disclosure configure a vibration member including an inner member and an outer member surrounding the inner member so that corrosion of the vibration member under high temperature and high humidity conditions can be prevented or reduced.

[0344] Fig.18A is a cross-sectional view of a vibration member according to an aspect of the present disclosure. Fig.18B An EDS analysis result of a vibration member according to an aspect of the present disclosure is illustrated. Fig.18A Based on reference Fig.14 The example of the description of the vibration member of aspect 2 is a cross-sectional view, and Fig.18B Illustrated by analyzing the reference Fig.14 The example described in aspect 2 is a component analysis result obtained by analyzing the components of the internal components of the vibration component.

[0345] refer to Fig.18A , it can be confirmed that the thickness of the inner member 110 and the outer member 120 are uniformly formed, and the adhesion between the inner member 110 and the outer member 120 is excellent without warping.

[0346] Reference Fig.18B When the inner member 110 includes aluminum Al, the content of aluminum Al is 79.4%, and the content of iron Fe is 0.4%.

[0347] Fig.19 According to another aspect of the present disclosure, Figure 1 The sound device according to another aspect of the present disclosure is similar to the reference device except that the vibration member 100 and the vibration device 500 have the same area. Figure 2 The aspects of the present disclosure described in the examples of FIG. 1 and FIG. 2 are substantially the same. Therefore, the description of the same configuration is omitted or may be briefly provided, and only the different configurations are described in detail.

[0348] Reference Fig.19 , the vibration member 100 according to another aspect of the present disclosure may be configured to have substantially the same area as the vibration device 500. For example, the vibration device 500 may be formed on the second surface 100b of the vibration member 100. For example, the vibration device 500 may be constructed on the entire surface of the second surface 100b of the vibration member 100. For example, the vibration device 500 may be connected or coupled to the entire surface of the second surface 100b of the vibration member 100 via the connection member 400.

[0349] The support member 300 may be constructed or arranged on the rear surface of the vibration member 100. The support member 300 may be constructed or arranged on the rear surface of the vibration device 500. The support member 300 may be configured to support an edge portion of a second surface 500b of the vibration device 500. The support member 300 may be configured to support the edge portion of the rear surface of the vibration device 500 and the vibration member 100. The support member 300 may be configured to cover the second surface 500b of the vibration device 500.

[0350] The supporting member 300 according to another aspect of the present disclosure may include an inner space 300S surrounding the second surface 500 b of the vibration device 500 .

[0351] The first support portion 310 according to another aspect of the present disclosure may be arranged in parallel with the vibration device 500. The first support portion 310 may be arranged to face the second surface 500b of the vibration device 500. The first support portion 310 may be arranged to cover the second surface 500b of the vibration device 500. The first support portion 310 may be spaced apart from the second surface 500b of the vibration device 500. For example, the first support portion 310 may be spaced apart from the second surface 500b of the vibration device 500 with an internal space 300S therebetween.

[0352] The second support portion 330 according to another aspect of the present disclosure may be configured or arranged at an edge portion (or a peripheral portion) of the vibration device 500 .

[0353] The support member 300 may be connected to or coupled to the vibration device 500 via the coupling member 200. The support member 300 may be connected to or coupled to the second surface 500b of the vibration device 500 via the coupling member 200. For example, the support member 300 may be connected to or coupled to an edge portion of the second surface 500b of the vibration device 500 via the coupling member 200. For example, the second support portion 330 may be connected to or coupled to the vibration device 500 via the coupling member 200. For example, the second support portion 330 may be connected to or coupled to the second surface 500b of the vibration device 500 via the coupling member 200. For example, the second support portion 330 may be connected to or coupled to the edge portion of the second surface 500b of the vibration device 500 via the coupling member 200.

[0354] The coupling member 200 may be configured to minimize, prevent or reduce the transmission of vibrations of the vibration device 500 to the support member 300 .

[0355] The coupling member 200 according to one aspect of the present disclosure prevents or reduces physical contact (or friction) between the vibration device 500 and the second support portion 330 of the support member 300 , thereby preventing or reducing noise caused by physical contact (or friction) between the vibration member 100 and the support member 300 .

[0356] Fig. 20 Another aspect of the present disclosure is illustrated. Fig.19 The sound output characteristics of the sound device shown. Fig. 20 Reference Fig.19 The example of the sound output characteristics of the sound device according to another aspect of the present disclosure is described. Fig. 20 , the horizontal axis represents frequency (Hz) and the vertical axis represents sound pressure level SPL (dB).

[0357] Table 10 below shows the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to another aspect of the present disclosure. The inventors of the present disclosure prepared samples of aspects 2 and 3 to confirm: the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to another aspect of the present disclosure. In Table 10, the average sound pressure level SPL (dB) characteristics of each frequency (Hz) according to another aspect of the present disclosure are shown in Table 10. Fig.14 Aspect 2 was prepared in the same manner as Aspect 2 of Table 4. Fig.19 Aspect 3 is prepared according to another aspect of the present disclosure described in the example. In aspect 3, aluminum is used for the inner member, and epoxy resin is used for the outer member. In aspect 3, the thickness of the inner member is 0.3 mm, and the thickness of the outer member is 0.1 mm. The thickness of the vibration device is 0.165 mm, and the thickness of the vibration member is 0.45 mm. The horizontal length and vertical length of the vibration device and the vibration member are configured to be 60 cm and 120 cm, respectively, and the area ratio of the vibration device and the vibration member is 1.0. Fig. 20 The average sound pressure level SPL (dB) characteristics of each frequency (Hz) of aspect 3 are shown.

[0358] [Table 10]

[0359]

[0360] Reference Fig. 20As shown in Table 10, the average sound pressure level SPL (dB) of each frequency (Hz) of aspect 3 is measured as 74.09 dB at 0.15 kHz to 20 kHz and as 70.76 dB at 0.15 kHz to 8 kHz, and it can be confirmed that the average sound pressure level SPL (dB) characteristic of aspect 3 has a lower sound pressure characteristic than the average sound pressure level SPL (dB) characteristic of aspect 2. Therefore, it can be confirmed that, compared with the configuration in which the area of ​​the vibration device 500 is the same as the area of ​​the vibration member 100, in the configuration in which the area of ​​the vibration device 500 is smaller than the area of ​​the vibration member 100 and the vibration device 500 is surrounded by the support member 300, the sound pressure characteristic is more improved.

[0361] A sound device according to one or more example aspects of the present disclosure is described below.

[0362] The sound device according to one or more aspects of the present disclosure may include: a vibration member; and a vibration device configured to vibrate the vibration member. The vibration member may include an inner member and an outer member surrounding the inner member.

[0363] According to one or more aspects of the present disclosure, the outer member may cover all surfaces of the inner member.

[0364] According to one or more aspects of the present disclosure, the inner member may be embedded inside the outer member.

[0365] According to one or more aspects of the present disclosure, the inner member and the outer member may be different materials.

[0366] According to one or more aspects of the present disclosure, the inner member may be a metal material.

[0367] According to one or more aspects of the present disclosure, the outer member may be a plastic material.

[0368] According to one or more aspects of the present disclosure, the inner member may be an aluminum material, and the outer member may be an epoxy material.

[0369] According to one or more aspects of the present disclosure, the inner member and the outer member may be different from each other in at least one or more of stiffness, density, and Young's modulus.

[0370] According to one or more aspects of the present disclosure, the density of the inner member can be between 1.7 g / cm 3 Up to 2.8 g / cm 3 within the range.

[0371] According to one or more aspects of the present disclosure, the modulus of the inner member may be in the range of 1 GPa to 100 GPa.

[0372] According to one or more aspects of the present disclosure, the density of the outer member may be between 1.2 g / cm 3 Up to 1.4 g / cm 3 within the range.

[0373] According to one or more aspects of the present disclosure, the modulus of the outer member may be in the range of 2 GPa to 10 GPa.

[0374] According to one or more aspects of the present disclosure, in a region where the inner member and the outer member vertically overlap, a thickness of the inner member may be greater than a thickness of the outer member.

[0375] According to one or more aspects of the present disclosure, the outer member may include: a first outer member located at a first surface of the inner member; and a second outer member located at a second surface of the inner member opposite to the first surface of the inner member.

[0376] According to one or more aspects of the present disclosure, the first outer member may accommodate the entire first surface of the inner member and a first portion of the side surface of the inner member, and the second outer member accommodates the entire second surface of the inner member and a second portion of the side surface of the inner member.

[0377] According to one or more aspects of the present disclosure, the first outer member and the second outer member may be the same material.

[0378] According to one or more aspects of the present disclosure, the first outer member and the second outer member may have the same thickness.

[0379] According to one or more aspects of the present disclosure, a vibration device may include: a vibration portion including a piezoelectric material; and a cover member covering at least one of a first surface of the vibration portion and a second surface of the vibration portion opposite to the first surface of the vibration portion.

[0380] According to one or more aspects of the present disclosure, the vibration device may further include a signal supply member electrically connected to the vibration part, and a portion of the signal supply member is accommodated between the cover member and the vibration part.

[0381] According to one or more aspects of the present disclosure, a vibration device may include: a first vibration generating part; a second vibration generating part stacked on the first vibration generating part; and an intermediate member between the first vibration generating part and the second vibration generating part. One of the first vibration generating part and the second vibration generating part may be connected to the vibration member.

[0382] According to one or more aspects of the present disclosure, the signal supply member and the vibration part may be integrated into one body.

[0383] According to one or more aspects of the present disclosure, each of the first vibration generating part and the second vibration generating part may include: a vibration part including a piezoelectric material; and a cover member covering at least one of a first surface of the vibration part and a second surface opposite to the first surface of the vibration part.

[0384] According to one or more aspects of the present disclosure, the sound device may further include: a support member at a rear surface of the vibration member and including an inner space surrounding the rear surface of the vibration member; and a coupling member through which the support member is coupled to the vibration member.

[0385] According to one or more aspects of the present disclosure, the coupling member may include a first coupling member and a second coupling member between the vibration member and the supporting member, and the first coupling member may be disposed inwardly from the second coupling member.

[0386] According to one or more aspects of the present disclosure, hardness of the first coupling member may be greater than hardness of the second coupling member.

[0387] According to one or more aspects of the present disclosure, hardness of the first coupling member may be smaller than hardness of the second coupling member.

[0388] According to one or more aspects of the present disclosure, an area of ​​the vibration device may be smaller than an area of ​​the vibration member.

[0389] According to one or more aspects of the present disclosure, an area of ​​the vibration device and the vibration member may be in a range of 0.08 to 0.12.

[0390] A sound device according to one or more aspects of the present disclosure may include a vibration member and a vibration device configured to vibrate the vibration member. The vibration member may have a core-shell structure including a core and a shell having different materials.

[0391] The sound device according to one or more aspects of the present disclosure may include: a vibration plate, a piezoelectric layer disposed on the vibration plate, and a signal supply line electrically connected between the piezoelectric layer and the vibration plate, the piezoelectric layer being configured to vibrate the vibration plate via a signal provided by the signal supply line. The vibration plate may include an inner member and an outer member surrounding the inner member.

[0392] According to one or more aspects of the present disclosure, the piezoelectric layer may include a first piezoelectric layer and a second piezoelectric layer. The sound device may further include an intermediate layer between the first piezoelectric layer and the second piezoelectric layer.

[0393] According to one or more aspects of the present disclosure, one of the first piezoelectric layer and the second piezoelectric layer may be connected to the vibration plate.

[0394] It will be apparent to those skilled in the art that various modifications and variations may be made to the present disclosure without departing from the scope of the present disclosure. Therefore, the present disclosure is intended to cover these modifications and variations of the present disclosure that fall within the scope of the claims and their equivalents.

[0395] CROSS-REFERENCE TO RELATED APPLICATIONS

[0396] This application claims priority to Korean Patent Application No. 10-2023-0100049 filed in Korea on Jul. 31, 2023, the entire contents of which are expressly incorporated into this application by reference.

Claims

1. A sound device, comprising: Vibrating components; as well as a vibration device configured to vibrate the vibration member, Wherein, the vibration component includes an inner component and an outer component surrounding the inner component.

2. The sound device according to claim 1, wherein The outer member covers all surfaces of the inner member.

3. The sound device according to claim 1, wherein The inner member is embedded in the outer member.

4. The sound device according to claim 1, wherein The inner member and the outer member are different materials.

5. The sound device according to claim 4, wherein: The inner member is made of metal material.

6. The sound device according to claim 4, wherein: The outer member is a plastic material.

7. The sound device according to claim 4, wherein: The inner member is an aluminum material, and the outer member is an epoxy material.

8. The sound device according to claim 1, wherein The inner member and the outer member differ from each other in at least one or more of stiffness, density, and Young's modulus.

9. A sound device, comprising: Vibrating components; as well as a vibration device configured to vibrate the vibration member, The vibration member has a core-shell structure including a core and a shell having different materials.

10. A sound device, comprising: Vibration plate; A piezoelectric layer, wherein the piezoelectric layer is disposed on the vibration plate; as well as a signal supply line electrically connected between the piezoelectric layer and the vibration plate, the piezoelectric layer being configured to vibrate the vibration plate via a signal supplied through the signal supply line, Wherein, the vibration plate includes an inner component and an outer component surrounding the inner component.

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