Device with vibrating member

Abstract

An apparatus having a vibrating member includes: a vibrating member; a vibrating device connected to a rear surface of the vibrating member; and a rear cover covering a rear surface of the vibration device. The rear cover includes a hole portion including a plurality of holes overlapping the vibration device. The size of the hole part is larger than that of the vibration device.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of and priority to Korean Patent Application No. 10-2023-0119923, filed on September 8, 2023, and Korean Patent Application No. 10-2024-0101846, filed on July 31, 2024, which are hereby incorporated by reference in their entirety for all purposes as if fully set forth herein. Technical Field

[0003] The present disclosure relates to devices, and more particularly to devices having a vibration member capable of outputting sound. Background Art

[0004] The device includes a separate speaker or sound device for providing sound. When the speaker is in the display device, the speaker occupies space; therefore, the design and spatial arrangement of the display device are limited.

[0005] A speaker applied to a device may be, for example, an actuator including a magnet and a coil. However, when the actuator is applied to a device, its thickness is large. Piezoelectric elements that enable thinning are attracting attention. Summary of the invention

[0006] Sound generated in a speaker or sound device embedded in a display device as a device is output in a rearward or lateral direction of the display device rather than in a forward direction of the display panel, and therefore does not travel toward a viewer or user who is viewing an image at a front area relative to the display panel, and thus there is a problem of hindering the immersive experience of the viewer viewing the image.

[0007] Therefore, the inventors of the present disclosure have recognized the problems described above and have conducted various studies and experiments on a device for outputting sound in its forward and backward directions. Based on the various studies and experiments, the inventors of the present disclosure have invented a new device for outputting sound in its forward and backward directions.

[0008] The present disclosure provides a device that can output sound in both forward and rearward directions thereof.

[0009] The present disclosure provides a device that can improve sound quality, can reproduce sounds of middle and high-pitched vocal cords, and can output sounds with wide orientation.

[0010] The present disclosure provides a device that can reduce temperature increase and can have low power consumption when driving a vibration device.

[0011] Additional features and aspects will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the inventive concepts provided herein. Other features and aspects of the inventive concepts may be realized and obtained by structures specifically pointed out in the written description or that may be derived from the written description and its 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 device includes: a vibration member; a vibration device connected to a rear surface of the vibration member; and a rear cover covering the rear surface of the vibration device. The rear cover includes a hole portion, the hole portion including a plurality of holes overlapping the vibration device. The size of the hole portion is larger than the size of the vibration device.

[0013] Details of other exemplary embodiments are included in the detailed description and drawings of the present disclosure.

[0014] The device according to one or more embodiments of the present disclosure may output sound in the forward and rearward directions of the vibration member (or display panel).

[0015] The device according to one or more embodiments of the present disclosure may improve sound quality, may reproduce sounds of middle and high pitch vocal cords, and may output sounds having a wide orientation.

[0016] Devices according to one or more embodiments of the present disclosure may include an embedded vibration device, may have an improved design, and may achieve a clean back design.

[0017] The device according to one or more embodiments of the present disclosure may include a membrane type vibration device including a piezoelectric material, and thus may have low current consumption and may output sound with a middle and high pitch sound band and a wide orientation, thereby achieving immersive sound.

[0018] The device according to one or more embodiments of the present disclosure may include a pad member, and thus may improve sound quality, and may prevent a temperature increase caused by driving of the vibration device because an air gap between the vibration member and the rear cover is maintained.

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

[0020] In the device according to one or more embodiments of the present disclosure, since the signal supply member and the vibration device are provided as one body, the signal supply member and the vibration device can be configured as one part (or element or one component), thereby achieving a single material effect.

[0021] In the device according to one or more embodiments of the present disclosure, the structure and manufacturing process of the vibration device can be simplified.

[0022] Other systems, methods, features, and advantages will be or will 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 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. Additional aspects and advantages are discussed below in conjunction with various aspects of the present disclosure.

[0023] It is to be understood that both the foregoing description and the following description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the disclosure, are incorporated in and constitute a part of this disclosure, illustrate aspects and embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0025] Figure 1 is a perspective view showing a device according to an embodiment of the present disclosure.

[0026] Figure 2 is an exploded perspective view showing a device according to an embodiment of the present disclosure.

[0027] Figure 3 A rear surface of a vibration member and a vibration device according to an embodiment of the present disclosure is shown.

[0028] Figure 4 is along Figure 1 A cross-sectional view taken along line II' is shown.

[0029] Figure 5 yes Figure 4 An enlarged view of 'A' is shown.

[0030] Figure 6 A first rear cover and a first hole portion of the hole portion according to an embodiment of the present disclosure are shown.

[0031] Figure 7 A second rear cover and a second hole portion of the hole portion according to an embodiment of the present disclosure are shown.

[0032] Figure 8 yes Figure 7 An enlarged view of 'B' is shown.

[0033] Fig. 9 A vibration member, a vibration device, and a rear surface of a pad member according to an embodiment of the present disclosure are shown.

[0034] Fig.10 is along Fig. 9 A cross-sectional view taken along line II-II' is shown.

[0035] Fig.11 is along Fig. 9 Another cross-sectional view taken along line II-II' is shown.

[0036] Fig.12 A rear surface of a vibration member and a vibration device according to another embodiment of the present disclosure is shown.

[0037] Fig.13 A first rear cover and a first hole portion of the hole portion according to another embodiment of the present disclosure are shown.

[0038] Fig.14 A rear surface of a vibration member and a vibration device according to another embodiment of the present disclosure is shown.

[0039] Fig.15 A vibration device according to an embodiment of the present disclosure is shown.

[0040] Fig.16 Shows Fig.15 The rear surface of the vibrating device is shown.

[0041] Fig.17 is a perspective view showing a vibration device according to another embodiment of the present disclosure.

[0042] Fig.18 is along Fig.17 A cross-sectional view taken along line III-III' is shown.

[0043] Fig.19 is along Fig.17 A cross-sectional view taken along line IV-IV' is shown.

[0044] Fig. 20 Shown is a reference Figures 17 to 19 The connection structure between the vibration device and the vibration component is described.

[0045] Fig.21 is a perspective view showing a vibration device according to another embodiment of the present disclosure.

[0046] Fig. 22 is along Fig.21 A cross-sectional view taken along line VV' is shown.

[0047] Fig.23 is along Fig.21 A cross-sectional view taken along line VI-VI' is shown.

[0048] Fig.24 A vibration device according to another embodiment of the present disclosure is shown.

[0049] Fig.25 yes Fig.24 A rear view of a vibration device according to another embodiment of the present disclosure is shown.

[0050] Fig.26 is along Fig.24 A cross-sectional view taken along line VII-VII' is shown.

[0051] Fig. 27 Shown is a reference Figure 24 to Figure 26 The connection structure between the vibration device and the vibration component is described.

[0052] Fig.28 Shown is a reference Figure 24 to Figure 26 Another connection structure between a vibration device and a vibration component is described.

[0053] Fig.29 is a perspective view showing a vibration device according to another embodiment of the present disclosure.

[0054] Fig. 30A The orientation of the sound output from the device according to the experimental example is shown.

[0055] Fig. 30B The orientation of the sound output from the device according to the embodiment of the present disclosure is shown.

[0056] Fig.31A Based on the reference from above Fig. 30A The sound pressure level characteristics of the beamforming sound output by the device according to the experimental example are described.

[0057] Fig.31B Based on the reference from above Fig. 30B The beamforming sound pressure level characteristics of the sound output by the device according to the embodiment of the present disclosure are described.

[0058] Fig.32A The above reference Fig. 30A The sound output characteristics of the device according to the experimental example are described.

[0059] Fig.32B The above reference Fig. 30BThe sound output characteristics of the device according to the embodiment of the present disclosure are described.

[0060] Fig.33 Sound output characteristics of the devices according to the first experimental example and the second experimental example are shown.

[0061] Fig.34 The above reference Fig.33 The sound output characteristics of the device according to the first experimental example and the sound output characteristics of the device according to the embodiment of the present disclosure are described.

[0062] Fig.35 The above reference Fig.33 The sound output characteristics of the device according to the first experimental example and the sound output characteristics of the device according to another embodiment of the present disclosure are described.

[0063] Fig.36 The current consumption of the device according to the experimental example and the current consumption of the device according to the embodiment of the present disclosure are shown.

[0064] Fig.37A The front surface temperature of the vibration member when the sound is output in the device according to the experimental example is shown.

[0065] Fig.37B The front surface temperature of the vibration member when the sound is output in the device according to the embodiment of the present disclosure is shown.

[0066] Throughout the drawings and detailed description, unless otherwise described, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustration, and convenience, the sizes, lengths, and thicknesses of layers, regions, and elements and their descriptions may be exaggerated. DETAILED DESCRIPTION

[0067] 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 a known function, structure, or configuration may unnecessarily obscure various aspects of the present disclosure, the detailed description of such known function or configuration may be omitted for the sake of brevity. In addition, repeated descriptions may be omitted for the sake of brevity. The described progression of processing steps and / or operations is a non-limiting example.

[0068] The order of steps and / or operations is not limited to the order set forth herein, and may be changed to occur in an order different from that described herein, except for steps and / or operations that must occur in a particular order. In one or more examples, two operations in succession may be performed substantially simultaneously, or the two operations may be performed in a reverse order or in a different order depending on the functions or operations involved.

[0069] Unless otherwise specified, similar reference numerals may always refer to similar elements, even if they are shown in different 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 properties. The names of the various elements used in the following description are selected for convenience only and may therefore differ from the names used in the actual product.

[0070] By referring to the various aspects described in the accompanying drawings, the advantages and features of the present disclosure and the implementation methods thereof are explained. However, the present disclosure can be embodied in different forms and should not be construed as being limited to the example aspects set forth herein. On the contrary, these example aspects are examples and are provided so that the present disclosure can 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.

[0071] The shapes (e.g., size, length, width, height, thickness, position, radius, diameter, and area), dimensions, ratios, angles, numbers, etc. disclosed herein, including those shown in the accompanying drawings, are merely examples, 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 accompanying drawings are part of the disclosure.

[0072] When terms such as "including", "having", "comprising", "containing", "consisting of", "made of", "formed of", etc. are used with respect to one or more elements, one or more other elements may be added unless terms such as "only" etc. are used. The terms used in the present disclosure are only used to describe example aspects and are not intended to limit the scope of the present disclosure. Unless the context clearly indicates otherwise, a term in the singular form may include a plural form.

[0073] Unless otherwise stated, the word "exemplary" is used to mean serving as an example or illustration. Aspects are example aspects. "Aspects," "examples," etc. should not be construed as being preferred or advantageous over other implementations. Unless otherwise stated, aspects, examples, example aspects, etc. may refer to one or more aspects, one or more examples, one or more example aspects, etc. In addition, the term "may" encompasses all meanings of the term "can."

[0074] In one or more aspects, unless otherwise expressly stated, an element, feature, or corresponding information (e.g., level, range, dimension, size, etc.) is interpreted as including an error or tolerance range, even if no explicit description of such an error or tolerance range is provided. The error or tolerance range may be caused by various factors (e.g., process factors, internal or external influences, noise, etc.). When interpreting a numerical value, unless otherwise expressly stated, the value is interpreted as including an error range.

[0075] When describing a positional relationship, when describing the positional relationship between two parts (e.g., layers, films, regions, components, sections, etc.) using, for example, “on…”, “over…”, “on top of…”, “over…”, “under…”, “above…”, “below…”, “near…”, “adjacent…”, “beside…”, “near…”, “on the side or on…”, etc., one or more other parts may be located between the two parts, unless more restrictive terms such as “immediately adjacent to”, “directly” or “closely” are used. For example, when a structure is described as being relative to another structure as follows When positioning: "on", "above", "on top of", "above", "below", "above", "below", "below", "near", "close to", "adjacent to", "beside", "near", "to the side or on", etc., the description should be interpreted to include the situation where the structures are in contact with each other and the situation where one or more additional structures are arranged or inserted therebetween. In addition, the terms "front", "back", "back", "left", "right", "top", "bottom", "downward", "upward", "upper", "lower", "up", "down", "column", "row", "vertical", "horizontal", etc. refer to an arbitrary reference system.

[0076] Spatially relative terms, such as "below," "beneath," "lower," "above," "upper," and the like, may be used to describe the relationship between various elements (e.g., layers, films, regions, components, sections, etc.) as shown. Spatially relative terms should be understood as terms that include 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 "above" the other elements. Thus, the term "below" as an example term may include all directions of "above" and "below." Similarly, the exemplary terms "above" or "up" may include both directions of "above" and "below."

[0077] When describing a temporal relationship, when the time order is described as, for example, "after", "subsequently", "next", "before", "previously", "in front of", etc., discontinuity or non-sequential situations may be included, and thus one or more other events may occur in between, unless more restrictive terms such as "just", "immediately", or "directly" are used.

[0078] Terms such as "below," "lower," "above," "upper," etc. may be used herein to describe the relationship between elements shown in the drawings. It should be understood that these terms are spatially relative and based on the orientation depicted in the drawings.

[0079] It should be understood that, although the terms "first", "second", etc. can be used to describe various elements (e.g., layers, films, regions, components, sections, etc.) in this article, these elements should not be limited to, for example, any particular order, priority order, or number of elements by these terms. 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, the first element, the second element, etc. can be arbitrarily named according to the convenience of those skilled in the art. For the sake of clarity, the function or structure of these elements (e.g., the first element, the second element, etc.) is not limited by the ordinal number or name in front of the element. In addition, the first element can include one or more first elements. Similarly, the second element, etc. can include one or more second elements, etc.

[0080] 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 identify corresponding elements from other elements, and these terms are not used to limit the nature, basis, order or number of the elements.

[0081] When an element (for example, a layer, a film, a region, a component, a section, etc.) is described as being “connected,” “coupled,” “attached,” “adhered,” etc. to another element, unless otherwise specified, the element may not only be directly connected, coupled, attached, adhered, etc. to another element but may also be indirectly connected, coupled, attached, adhered, etc. to another element with one or more intervening elements being disposed or inserted between the elements.

[0082] When an element (for example, a layer, film, region, component, section, etc.) is “contacted”, “overlapped”, etc. with another element, unless otherwise specified, the element may not only be directly in contact with, overlapped with, etc., but may also be indirectly in contact with, overlapped with, etc., with another element with one or more intervening elements disposed or inserted between the elements.

[0083] Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) is "arranged," "set," etc. in another element may be understood as at least a portion of the element being arranged, set, etc. in another element, or the entirety of the element being arranged, set, etc. in another element. Phrases where an element (e.g., a layer, a film, a region, a component, a section, etc.) "contacts," "overlaps," etc. with another element may be understood as at least a portion of the element being in contact with, overlapping, etc. with at least a portion of another element, the entirety of the element being in contact with, overlapping, etc. with at least a portion of another element, or at least a portion of the element being in contact with, overlapping, etc. with the entirety of another element.

[0084] Terms such as "row" or "direction" should not be interpreted based solely on the geometric relationship of the corresponding rows or directions being parallel or perpendicular to each other. Such terms may refer to a wider range of rows or directions in which the components of the present disclosure can be functionally operated. For example, terms such as "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, and may refer to directions with wider directivity within the range in which the components of the present disclosure can be functionally operated.

[0085] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, each of the phrases "at least one of the first, second, or third items" and "at least one of the first, second, and third items" can mean: (i) a combination of items provided by two or more of the first, second, and third items; or (ii) only one of the first, second, or third items.

[0086] The expression of a first element, a second element “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); or some combination of A, B, and C (e.g., A and B; A and C; or 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 refer to only A; only B; A or B; or A and B.

[0087] In one or more aspects, unless otherwise stated, for convenience, the terms "between" and "among" may be simply used interchangeably. For example, the expression "between a plurality of elements" may be understood as between a plurality of elements. In another example, the expression "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 the at least two elements, or one or more intervening elements may also be present.

[0088] In one or more aspects, unless otherwise specified, for convenience, the phrases "each other" and "mutually" may be simply used interchangeably. For example, the expression "different from each other" may be understood as different from each other. In another example, the expression "different from each other" may be understood as 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.

[0089] In one or more aspects, unless otherwise indicated, the phrases "one or more of" and "one or more of" may be used simply interchangeably for convenience.

[0090] 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 uses a or b" means any of the natural inclusive permutations. For example, "a or b" may mean "a", "b", or "a and b". For example, "a, b or c" may mean "a", "b", "c", "a and b", "b and c", "a and c", or "a, b, and c".

[0091] The features of various aspects of the present disclosure may be coupled or combined in part or in their entirety, 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 performed independently of one another, or may be implemented or performed together with a common reliance or related relationship. In one or more aspects, the components of each device according to various aspects of the present disclosure may be operationally coupled and configured.

[0092] Unless otherwise defined, the terms (including technical and scientific terms) used herein have the same meaning as those generally understood by ordinary technicians in the field to which the exemplary aspects belong. It should also be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or overly formal sense, unless otherwise clearly defined herein.

[0093] The terms used herein have been selected as common terms 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.

[0094] In addition, in certain cases, the terms may be arbitrarily selected by the applicant, and in this case, their detailed meanings are described herein. Therefore, the terms used in this article should be understood not only based on the term names, but also based on the meanings of the terms and their contents.

[0095] The “X-axis direction”, “Y-axis direction”, and “Z-axis direction” should not be interpreted only by the geometric relationship of being vertical to each other, and may have broader directivities within the range in which the elements of the present disclosure can function functionally.

[0096] In the following description, various example 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, similar reference numerals may refer to similar elements. The same or similar elements may be represented by the same reference numerals even if they are depicted in different drawings.

[0097] In addition, for ease of description, the proportions, dimensions, sizes and thicknesses of each of the elements shown 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 shown in the drawings.

[0098] Figure 1 is a perspective view showing a device according to an embodiment of the present disclosure. Figure 2 is an exploded perspective view showing a device according to an embodiment of the present disclosure. Figure 3 A rear surface of a vibration member and a vibration device according to an embodiment of the present disclosure is shown. Figure 4 is along Figure 1 A cross-sectional view taken along line II' is shown. Figure 5 yes Figure 4 An enlarged view of 'A' is shown.

[0099] Reference Figures 1 to 5 , the device 10 according to the embodiments of the present disclosure may implement or realize 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 sound bar for a vehicle device, etc. For example, the vehicle device may include one or more seats and one or more windows (or glass windows). For example, the vehicle device may include a vehicle, a train, a ship, or an aircraft, but the embodiments of the present disclosure are not limited thereto. In addition, the device 10 may implement or realize analog signage or digital signage, such as a billboard, a poster, or a notice board, etc.

[0100] The apparatus 10 according to an embodiment of the present disclosure can be applied to a vehicle by being implemented as a user interface device, such as a central control panel in a car. For example, the user interface device of the vehicle can be configured between two front seat occupants so that the sound generated by the vibration of the display module is propagated toward the interior of the vehicle. Therefore, the audio experience in the vehicle can be improved compared to having speakers only on the interior side of the vehicle.

[0101] The device 10 according to an embodiment of the present disclosure may be a display device including a plurality of pixels, but the embodiments of the present disclosure are not limited thereto. The display device may include: a display panel including a plurality of pixels for configuring a black / white or color image; and a driver configured to drive the display panel. The pixel may be a sub-pixel configured to realize one of a plurality of colors of a color image.

[0102] The device 10 according to an embodiment of the present disclosure may include a vibration member 100 , a vibration device 300 , and a back cover 500 .

[0103] The vibration member 100 may generate vibration or may output sound (or sound waves) based on the displacement (or drive or vibration) of the vibration device 300. The vibration member 100 may be a passive vibration panel, a display panel, a vibrating object, a display member, a sign panel, a passive vibration plate, a front member, a vibration panel, a sound panel, a sound output plate, a sound vibration plate, or an image screen, etc., but the embodiments of the present disclosure are not limited thereto.

[0104] The vibration member 100 according to the embodiment of the present disclosure may include a polygonal shape including a rectangular shape or a square shape, but the embodiment of the present disclosure is not limited thereto. The vibration member 100 may include a horizontal length (or long side) parallel to the first direction X and a vertical length (or short side) parallel to the second direction (or Y-axis direction). For example, relative to the same plane, the first direction X may be a first horizontal direction, an X-axis direction, or a first horizontal length direction (or a long side length direction) of the vibration member 100. For example, the second direction Y may be a second horizontal direction, a Y-axis direction, or a second horizontal length direction (or a short side length direction) of the vibration member 100 orthogonal to the first direction X.

[0105] The vibration member 100 according to an embodiment of the present disclosure may include a structure having exactly the same thickness, but the embodiments of the present disclosure are not limited thereto. For example, the vibration member 100 may include a plate structure having exactly the same thickness, but the embodiments of the present disclosure are not limited thereto. For example, the vibration member 100 may include one or more of a planar structure and a non-planar structure.

[0106] According to an embodiment of the present disclosure, the vibration member 100 may include a first surface 100a, a second surface 100b, and a plurality of side surfaces 100c. In the vibration member 100, the first surface 100a may be a front surface, a forward surface, a top surface, or an upper surface. The second surface 100b may be a rear surface, a rearward surface, a bottom surface, or a lower surface. Each of the plurality of side surfaces 100c may be an outer side, a side wall, or an outer wall.

[0107] The vibration member 100 according to another embodiment of the present disclosure may include a vibration plate, which includes a metal material or a non-metal material (or a composite non-metal material) having material properties suitable for outputting sound based on vibration. The vibration member 100 may be configured to be transparent, translucent or opaque. The metal material of the vibration member 100 may include any one or more materials of stainless steel, aluminum (Al), Al alloy, magnesium (Mg), Mg alloy and magnesium-lithium (Mg-Li) alloy, but the embodiments of the present disclosure are not limited thereto. The non-metal material (or composite non-metal material) of the vibration member 100 may include one or more materials (or substances) of plastic, fiber, leather, wood, cloth, rubber, carbon, glass and paper, but the embodiments of the present disclosure are not limited thereto. For example, the paper may be a cone paper for a speaker. For example, the cone paper may be pulp or foamed plastic, etc., but the embodiments of the present disclosure are not limited thereto.

[0108] The plastic material of the vibration member 100 according to an embodiment of the present disclosure may be configured as polyethylene terephthalate (PET), polycarbonate (PC), polyimide (PI), polypropylene (PP), polyarylate (PAR), polyethersulfone (PES), polyethylene naphthalate (PEN), polysulfone (PS), cyclic olefin copolymer (COC) or carbon fiber reinforced plastic (CFRP), etc., but the embodiments of the present disclosure are not limited thereto.

[0109] The vibration member 100 according to another embodiment of the present disclosure may be configured with a plastic material such as a styrene material, but the embodiments of the present disclosure are not limited thereto. For example, the styrene material may be an ABS material. The ABS material may be acrylonitrile, butadiene, and styrene.

[0110] The vibration member 100 according to an embodiment of the present disclosure may include a porous material. For example, the vibration member 100 may include a microporous plastic material. For example, the vibration member 100 may be configured as a polyethylene terephthalate (PET) material or a polycarbonate (PC) material. For example, the vibration member 100 may be configured as a microporous polyethylene terephthalate (MCPET) material. The vibration member 100 configured with MCPET may have the ability to reproduce high original sound due to low density and excellent elastic force, thereby improving the quality of the sound.

[0111] The vibration member 100 according to another embodiment of the present disclosure may implement or realize a signage panel such as an analog signage or a digital signage, such as a billboard, a poster, or a notice board. For example, when the vibration member 100 implements a signage panel, the analog signage may include signage content such as sentences, pictures, and logos. The signage content may be set at the vibration member 100 to make the signage content visible. 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 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 printed on a medium such as paper, and the medium on which the signage content is printed may be directly attached to one or more of the first surface 100a and the second surface 100b of the vibration member 100. For example, when the signage content is attached to the second surface 100b of the vibration member 100, the vibration member 100 may be configured as a transparent material. For example, the vibration member 100 may be a passive vibration member or a display panel, etc., but the embodiments of the present disclosure are not limited thereto. The vibration member 100 according to another embodiment of the present disclosure may include a display panel 110 including a plurality of pixels for realizing black / white or color images.

[0112] The display panel 110 may display an image, for example, an electronic image or a digital image. For example, the display panel 110 may output light to display an image. For example, the display panel 110 may be a curved display panel, or may be any type of display panel such as a liquid crystal display panel, an organic light-emitting display panel, a quantum dot light-emitting display panel, a micro-light-emitting diode display panel, and an electrophoretic display panel. The display panel 110 may be a flexible display panel. For example, the display panel 110 may be a flexible light-emitting display panel, a flexible electrophoretic display panel, a flexible electrowetting display panel, a flexible micro-light-emitting diode display panel, or a flexible quantum dot light-emitting display panel, but the embodiments of the present disclosure are not limited thereto.

[0113] Reference Figures 2 to 4 The display panel 110 (or the vibration member 100 ) according to an embodiment of the present disclosure may include a base member 111 , a pixel array part 112 , and a packaging member 113 .

[0114] The base member 111 may be configured as one or more of a glass member, a flexible glass member, and a plastic member. For example, the base member 111 may be configured as a polyimide material.

[0115] The pixel array section 112 may be configured on the base member 111 to display an image. For example, the pixel array section 112 may include a light emitting device (or a light emitting device layer) disposed on the base member 111. For example, the pixel array section 112 may include a plurality of pixels having a light emitting device (or a light emitting device layer) disposed on the base member 111. For example, each of the plurality of pixels may include a pixel circuit (or a circuit layer) having a thin film transistor connected to the light emitting device. For example, the pixel array section 112 may be a pixel layer, a pixel array layer, a display layer, or a display section, but the embodiments of the present disclosure are not limited thereto.

[0116] The encapsulation member 113 may be configured to cover the pixel array portion 112. For example, the encapsulation member 113 may be configured to surround the pixel array portion 112, and may be configured to prevent oxygen or water from penetrating into the light-emitting device of the pixel array portion 112. For example, the encapsulation member 113 may be disposed (or configured) to cover the pixel array portion 112 at other portions (or display portions) of the base member 111 except for one peripheral portion of the base member 111. For example, the encapsulation member 113 may have a size smaller than the base member 111, or may have a size larger than the pixel array portion 112 and smaller than the base member 111. For example, the encapsulation member 113 may include at least one inorganic material layer, or may include a metal material. For example, the encapsulation member 113 may be a plate member, an encapsulation plate, a backplane, a metal plate, but the embodiments of the present disclosure are not limited thereto.

[0117] The device 10 according to an embodiment of the present disclosure may further include a driving circuit part (or a panel driving circuit part) 150 .

[0118] The driving circuit portion 150 may be disposed at the rear surface of the display panel 110 (or the vibration member 100). The driving circuit portion 150 may be configured to be electrically connected to the display panel 110 (or the vibration member 100). The driving circuit portion 150 may be disposed (or configured) at the second surface 100b of the vibration member 100 or the rear surface of the display panel 110, and may be configured to be electrically connected to the pad portion 115 at the display panel 110 (or the vibration member 100). For example, the rear surface of the display panel 110 may be the second surface 100b of the vibration member 100.

[0119] The pad portion 115 may be provided at one side of the display panel 110. For example, the pad portion 115 may be provided at one peripheral portion of the display panel 110. For example, the pad portion 115 may include a plurality of pads electrically connected to a signal line configured at the display panel 110. The plurality of pads may be electrically connected to the driving circuit portion 150. For example, the signal line may be configured to be electrically connected to a pixel circuit configured at each of a plurality of pixels.

[0120] The driving circuit part 150 according to an embodiment of the present disclosure may include a plurality of flexible films 151 , a plurality of data driving integrated circuits (ICs) 153 , one or more printed circuit boards (PCBs) 155 , and a control board 157 .

[0121] Each of the plurality of flexible films 151 may be attached at the pad portion 115 of the display panel 110 through a film attaching process. Each of the plurality of flexible films 151 may be disposed at the rear surface of the display panel 110. For example, the plurality of flexible films 151 may be a chip on film, but embodiments of the present disclosure are not limited thereto.

[0122] Each of the plurality of data driver ICs 153 may be individually mounted on a corresponding flexible film 151 among the plurality of flexible films 151. Each of the plurality of data driver ICs 153 may receive a timing control signal and pixel data provided from the control board 157, convert the pixel data into an analog pixel-based data signal based on the timing control signal, and output the pixel-based data signal. The pixel-based data signal may be supplied to a signal line (e.g., a data line) configured at the pixel array portion 112 through the flexible film 151 and the pad portion 115.

[0123] One or more PCBs 155 may be connected to the plurality of flexible films 151 and may be disposed at the second surface 100b of the vibration member 100 or at the rear surface of the display panel 110. For example, one or more PCBs 155 may be disposed (or fixed) at a rear peripheral portion of the vibration member 100 (or the display panel 110). One or more PCBs 155 may be configured to transmit signals and power between elements of the driving circuit portion 150. For example, one or more PCBs 155 may be disposed (or fixed) at a rear peripheral portion of the base member 111 of the display panel 110. For example, one or more PCBs 155 may be connected (or attached) to a rear peripheral portion of the base member 111 of the display panel 110 through a buffer member. The buffer member may include a material for blocking or minimizing the vibration transmission of the vibration member 100 or the display panel 110 to one or more PCBs 155. For example, the buffer member may be a double-sided tape or a double-sided buffer tape, but embodiments of the present disclosure are not limited thereto.

[0124] The control board 157 may be disposed (or fixed) at the rear surface of the vibration member 100 (or the display panel 110), and may be connected to one or more PCBs 155 through a signal transfer member 156. The control board 157 may be connected to a host system (or a display drive system). The control board 157 may be configured to provide pixel data and timing control signals to a plurality of data drive ICs 153 through a signal transfer member 156, one or more PCBs 155, and a plurality of flexible films 151 based on timing synchronization signals and image data supplied from the host system.

[0125] The vibration device 300 may be configured to vibrate the vibration member 100 (or the display panel 110). The vibration device 300 may be configured (or arranged) at the second surface 100b of the vibration member 100 or connected to the second surface 100b. For example, the vibration device 300 may be configured (or arranged) at the rear surface of the display panel 110 or connected to the rear surface. For example, the vibration device 300 may be configured (or arranged) at the encapsulation member 113 of the display panel 110 or connected to the encapsulation member 113. For example, the vibration device 300 may be configured (or arranged) at the rear surface of the encapsulation member 113 of the display panel 110 or connected to the rear surface, but the embodiments of the present disclosure are not limited thereto. For example, the rear surface of the encapsulation member 113 may be the second surface 100b of the vibration member 100.

[0126] The vibration device 300 may be configured to vibrate (or displace or drive) based on a drive signal (or electrical signal or voice signal) applied through the signal cable 350 to vibrate (or displace or drive) the vibration member 100 (or display panel 110). The vibration device 300 may vibrate the vibration member 100 (or display panel 110) to output a first sound S1 or a first tactile feedback in the forward direction (or first sound output direction) SOD1 of the vibration member 100. For example, the vibration device 300 may directly vibrate the vibration member 100 (or display panel 110) to output a first sound S1 or a first tactile feedback in the forward direction (or first sound output direction) SOD1 of the vibration member 100. For example, the vibration device 300 may be a vibration generating portion, 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 the embodiments of the present disclosure are not limited thereto.

[0127] The vibration device 300 according to the embodiment of the present disclosure may include a piezoelectric material or an electroactive material having piezoelectric properties. For example, the vibration device 300 may be a membrane-type vibration device (or a piezoelectric vibration device) including a piezoelectric material. The vibration device 300 may vibrate (or shift) autonomously based on the vibration (or displacement or drive) of the piezoelectric material according to the driving signal applied to the piezoelectric material, or may vibrate (or shift or drive) the vibration member 100, etc. The vibration device 300 may alternately repeat contraction and / or expansion based on the piezoelectric effect (or piezoelectric properties) to vibrate (or shift or drive). For example, the vibration device 300 may vibrate (or shift or drive) in the vertical direction (or thickness direction) Z as contraction and / or expansion are alternately repeated by the reverse piezoelectric effect.

[0128] According to an embodiment of the present disclosure, the vibration device 300 may be configured as a membrane-type vibration device including a piezoelectric material, and thus may have a relatively smaller vibration width (or displacement width or drive width) than a coil-based vibration device. Therefore, in the device 10 according to an embodiment of the present disclosure, the sound characteristics and / or sound pressure level characteristics of the mid-high pitch vocal cords of the sound generated by the vibration of the vibration member 100 based on the vibration (or displacement or drive) of the vibration device 300 may be enhanced. In addition, the device 10 according to an embodiment of the present disclosure may include a membrane-type vibration device including a piezoelectric material, and thus may have low power consumption, and may output a sound with a mid-high pitch vocal cord and a wide orientation, thereby achieving immersive sound. In addition, since the device 10 according to an embodiment of the present disclosure includes a membrane-type vibration device including a piezoelectric material, the device 10 may be embedded and may be applied to various sound bars or displays, etc., such as a bendable device or a curved device that can reproduce high pitches and / or can improve orientation. For example, the middle-pitched vocal band may be 300 Hz or 500 Hz or higher, and 3 kHz or lower, and the middle-high-pitched vocal band may be 3 kHz or higher, but embodiments of the present disclosure are not limited thereto.

[0129] The vibration device 300 according to an embodiment of the present disclosure may have a rectangular shape including a long side and a short side. For example, the vibration device 300 may include a rectangular shape having a first length (or short side) parallel to the first direction X and a second length (or long side) parallel to the second direction Y. For example, the vibration device 300 may include a rectangular shape in which the second length (or long side length) is greater than the first length (or short side length). For example, the vibration device 300 may include a rectangular shape in which the second length is twice (or twice) the first length, but the embodiment of the present disclosure is not limited thereto. The long side LS of the vibration device 300 may be parallel to the short side of the vibration member 100, and the short side SS of the vibration device 300 may be parallel to the long side of the vibration member 100. For example, the long side length direction of the vibration device 300 may be parallel to the second direction Y or the short side length direction (or vertical direction) of the vibration member 100. For example, the vibration device 300 may have a vertical arrangement structure.

[0130] Reference Figure 2 , Figure 4 and Figure 5, the vibration device 300 according to an embodiment of the present disclosure may be connected to or coupled to the vibration member 100 (or the display panel 110) through a connecting member 400. For example, the vibration device 300 may be connected to the second surface 100b of the vibration member 100 or supported by the second surface 100b of the vibration member 100 through a connecting member 400. For example, the vibration device 300 may be connected to the rear surface of the display panel 110 or supported by the rear surface of the display panel 110 through a connecting member 400. For example, the connecting member 400 may be a first connecting member, an adhesive member, or a first adhesive member, but the embodiments of the present disclosure are not limited thereto. In the following description, the vibration member 100 may be the display panel 110.

[0131] The connection member 400 may be disposed between the vibration device 300 and the vibration member 100, and may connect or couple the vibration device 300 to the vibration member 100. For example, the vibration device 300 may be connected or coupled to the second surface 100b of the vibration member 100 through the connection member 400, and thus the vibration device 300 may be supported by or disposed at the second surface 100b of the vibration member 100.

[0132] The connection member 400 according to an embodiment of the present disclosure may include an adhesive layer (or adhesive layer) with good attachment or adhesion. For example, the connection member 400 may be configured as a material including an adhesive layer, which has good attachment or adhesion relative to each of the second surface 100b of the vibration device 300 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 tape, a double-sided adhesive foam pad, or an adhesive sheet, etc., but the embodiments of the present disclosure are not limited thereto. For example, when the connection member 400 includes an adhesive layer (or adhesive layer), the connection member 400 may include only an adhesive layer or adhesive layer without a base member such as a plastic material.

[0133] The adhesive layer (or adhesive layer) of the connecting member 400 according to an embodiment of the present disclosure may include epoxy resin, acrylic, silicone or urethane, but the embodiment of the present disclosure is not limited thereto. The adhesive layer (or adhesive layer) of the connecting member 400 according to another embodiment of the present disclosure may include a pressure-sensitive adhesive (PSA), an optically clear adhesive (OCA) or an optically clear resin (OCR), but the embodiment of the present disclosure is limited thereto. For example, the adhesive layer (or adhesive layer) of the connecting member 400 may include an acrylic-based substance (or material) having the following characteristics: relatively better adhesion and higher hardness than urethane materials. Therefore, the vibration of the vibration device 300 can be efficiently transmitted to the vibration member 100.

[0134] The connection member 400 according to another embodiment of the present disclosure may include one or more of a heat-curable adhesive, a light-curable adhesive, and a thermosetting adhesive (or a thermal bonding adhesive). For example, the connection member 400 may include a thermosetting adhesive. The thermosetting adhesive may be a heat-activated type or a heat-curable type. For example, the connection member 400 including a thermosetting adhesive may attach or couple the vibration device 300 and the vibration member 100 by heat and pressure.

[0135] In the device 10 according to an embodiment of the present disclosure, the vibration member 100 may include a first area A1 and a second area A2. For example, the second surface 100b of the vibration member 100 may include a first area (or a first rear area) A1 and a second area (or a second rear area) A2. For example, the first area A1 may be a left rear area (or a right rear area), and the second area A2 may be a right rear area (or a left rear area). For example, the first area A1 may include a first display area, and the second area A2 may include a second display area. For example, the first area A1 may include a left display area (or a right display area), and the second area A2 may include a right display area (or a left display area). The first area A1 and the second area A2 may be left-right symmetrical relative to the center line CL of the vibration member 100 based on the first direction X, but the embodiments of the present disclosure are not limited thereto, and the first area A1 and the second area A2 may be left-right asymmetrical.

[0136] Reference Figures 2 to 5 , the device 10 or the vibration device 300 according to an embodiment of the present disclosure may include a first vibration device 300 - 1 and a second vibration device 300 - 2 .

[0137] The first vibration device 300-1 may be configured to vibrate the first area A1 of the vibration member 100. The first vibration device 300-1 may be disposed at the first area A1 of the vibration member 100. The first vibration device 300-1 may be connected to or coupled to the first area A1 of the vibration member 100 through the connection member 400, and thus the first vibration device 300-1 may be disposed at the first area A1 of the vibration member 100 or supported by the first area A1 of the vibration member 100. The first vibration device 300-1 may be connected to or supported by the second surface 100b of the vibration member 100 overlapping the first area A1 of the vibration member 100 through the connection member 400. The first vibration device 300-1 may vibrate the first area A1 of the vibration member 100, and thus the first vibration device 300-1 may generate a first sound S1 or a first tactile feedback in the first area A1 of the vibration member 100. For example, the first vibration device 300-1 may directly vibrate the first area A1 of the vibration member 100, and thus the first vibration device 300-1 may generate a first sound S1 or a first tactile feedback in the first area A1 of the vibration member 100. For example, the first sound S1 may be a left sound (or a right sound).

[0138] The second vibration device 300-2 may be configured to vibrate the second area A2 of the vibration member 100. The second vibration device 300-2 may be disposed at the second area A2 of the vibration member 100. The second vibration device 300-2 may be connected to or coupled to the second area A2 of the vibration member 100 through the connecting member 400, and thus the second vibration device 300-2 may be disposed at the second area A2 of the vibration member 100 or supported by the second area A2 of the vibration member 100. The second vibration device 300-2 may be connected to or supported by the second surface 100b of the vibration member 100 overlapping the second area A2 of the vibration member 100 through the connecting member 400. The second vibration device 300-2 may vibrate the second area A2 of the vibration member 100, and thus the second vibration device 300-2 may generate a second sound S2 or a second tactile feedback in the second area A2 of the vibration member 100. For example, the second vibration device 300-2 may directly vibrate the second area A2 of the vibration member 100, and thus the second vibration device 300-2 may generate a second sound S2 or a second tactile feedback in the second area A2 of the vibration member 100. For example, the second sound S2 may be a right sound (or a left sound).

[0139] The back cover 500 may be configured or disposed at the rear surface of the vibration member 100. For example, the back cover 500 may be configured or disposed at the second surface 100b of the vibration member 100. The back cover 500 may be configured to cover or surround the second surface 100b of the vibration member 100. The back cover 500 may be configured to cover or surround the second surface 100b and the side surface 100c of the vibration member 100. The back cover 500 may be configured or disposed to be spaced apart from the second surface 100b of the vibration member 100. For example, the back cover 500 may be disposed to face the second surface 100b of the vibration member 100, wherein there is a gap space 10s between the back cover 500 and the second surface 100b of the vibration member 100. For example, the back cover 500 may be spaced apart from the second surface 100b of the vibration member 100, wherein there is a gap space 10s between the back cover 500 and the second surface 100b of the vibration member 100. For example, the back cover 500 may be a rear structure, a supporting member, a shell, a housing, a shell member, a housing, a housing member, a cabinet, a sealing member, or a sealing box, etc., but embodiments of the present disclosure are not limited thereto. For example, the gap space 10s may be a first space, an air gap, an air space, a vibration space, a sound space, a sound box, or a sealed space, etc., but embodiments of the present disclosure are not limited thereto.

[0140] The back cover 500 may be configured to cover the vibration device 300. The back cover 500 may be spaced apart from the rear surface of the vibration device 300. For example, the back cover 500 may be configured to cover the first vibration device 300-1 and the second vibration device 300-2 of the vibration device 300. For example, the back cover 500 may be spaced apart from the rear surface of each of the first vibration device 300-1 and the second vibration device 300-2 of the vibration device 300. For example, the back cover 500 may be configured to cover the second surface 100b of the vibration member 100 and the rear surface of the vibration device 300. For example, the back cover 500 may be configured to cover the second surface 100b of the vibration member 100 and the rear surface of each of the first vibration device 300-1 and the second vibration device 300-2 of the vibration device 300.

[0141] The device according to one or more embodiments of the present disclosure may have an improved design and achieve a clean back design because the vibration device 300 may be covered by the back cover 500 or embedded (or built-in) between the vibration member 100 and the back cover 500 .

[0142] The back cover 500 according to the embodiment 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 embodiment of the present disclosure is not limited thereto. For example, the back cover 500 may include one or more of a metal material, a plastic, and a wood material, but the embodiment of the present disclosure is not limited thereto. For example, the connecting member 400 may be configured as a metal material such as an aluminum (Al) material or a plastic material such as a plastic or styrene material, but the embodiment of the present disclosure is not limited thereto.

[0143] The device 10 according to an embodiment of the present disclosure may further include a connection member 200 .

[0144] The connection member 200 may be disposed (or provided) between the vibration member 100 and the back cover 500. The connection member 200 may be configured to space the back cover 500 from the rear surface of the vibration member 100. The connection member 200 may be disposed between the vibration member 100 and the back cover 500 to provide a gap space 10s.

[0145] The back cover 500 may be coupled or connected to the vibration member 100 through the connection member 200. The back cover 500 may be connected or coupled to the second surface 100b of the vibration member 100 through the connection member 200. The back cover 500 may be connected or coupled to the peripheral portion of the vibration member 100 through the connection member 200. For example, the back cover 500 may be connected or coupled to the peripheral portion of the second surface 100b of the vibration member 100 through the connection member 200.

[0146] The connecting member 200 may be configured to minimize or prevent the transmission of the vibration of the vibration member 100 to the back cover 500. The connecting member 200 may include material properties suitable for preventing the vibration from being transmitted from the vibration member 100 to the back cover 500. For example, the connecting member 200 may include a material having elasticity (or Young's modulus). For example, the connecting member 200 may include a material having elasticity for vibration absorption (or impact absorption). The connecting member 200 according to an embodiment of the present disclosure may be configured as a polyurethane material or a polyolefin material, but the embodiments of the present disclosure are not limited thereto. For example, the connecting member 200 may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, a double-sided foam pad, and a double-sided buffer tape, but the embodiments of the present disclosure are not limited thereto.

[0147] The connection member 200 according to an embodiment of the present disclosure can prevent physical contact (or friction) between the vibration member 100 and the back cover 500, and thus can prevent the occurrence of noise (or noise) caused by physical contact (or friction) between the vibration member 100 and the back cover 500. For example, the connection member 200 may be a panel connection member, a coupling member, a first connection member, a buffer member, an elastic member, a damping member, a vibration absorbing member, a vibration-proof member, or a vibration blocking member, but the embodiments of the present disclosure are not limited thereto.

[0148] The connection member 200 according to another embodiment of the present disclosure may be configured to minimize or prevent the transmission of the vibration of the vibration member 100 to the back cover 500 and reduce the reflection of sound waves generated and input based on the vibration of the vibration member 100 .

[0149] Reference Figure 3 and Figure 4 , the connection member 200 according to an embodiment of the present disclosure may include one or more protrusions 200p. For example, the one or more protrusions 200p may be a protrusion pattern, but the embodiment of the present disclosure is not limited thereto.

[0150] One or more protrusions 200p may protrude from the side surface (or inner surface) of the connection member 200. For example, one or more protrusions 200p may protrude from the side surface (or inner surface) of the connection member 200 toward the gap space 10s. For example, one or more protrusions 200p may protrude from the side surface (or inner surface) of the connection member 200 toward the side surface (or sidewall) of the vibration device 300.

[0151] According to one or more protrusions 200p of the embodiment of the present disclosure, it can have a triangular shape or a sawtooth shape, but the embodiment of the present disclosure is not limited thereto. One or more protrusions 200p can absorb or capture the reflected wave generated by the reflection of the connecting member 200, and thus the reduction of the sound pressure level characteristics caused by the standing wave (standingwave) generated by the interference (interference) of the reflected wave and the traveling wave can be prevented or minimized. For example, the reflected wave reflected from the connecting member 200 based on the vibration of the vibration member 100 can be dispersed or reflected by one or more protrusions 200p, and thus the overlap and interference phenomenon between the reflected wave and the traveling wave can be prevented or minimized, thereby preventing or minimizing the occurrence of standing waves. Therefore, each of the highest sound pressure level and the lowest sound pressure level generated in the reproduction frequency band of the sound generated by the vibration of the vibration member 100 can be reduced, and thus the flatness of the sound pressure level can be enhanced.

[0152] Reference Figures 2 to 4, a connection member 200 according to another embodiment of the present disclosure may include a first connection member 210 and a second connection member 220 .

[0153] The first connection member 210 may be disposed between the vibration member 100 and the back cover 500. The first connection member 210 may be disposed or coupled between the rear peripheral portion of the vibration member 100 and the back cover 500. For example, the first connection member 210 may be disposed on the inner side (or inside) of the second connection member 220. The first connection member 210 may be configured to have a hardness, such as a modulus (or Young's modulus), that is smaller than that of the second connection member 220. For example, the first connection member 210 may include a double-sided polyurethane tape, a double-sided polyurethane foam tape, or a double-sided sponge tape, etc., but embodiments of the present disclosure are not limited thereto.

[0154] The first connection member 210 may include one or more protrusions 200 p. For example, the one or more protrusions 200 p may protrude from a side surface (or inner surface) of the first connection member 210.

[0155] The second connection member 220 may be disposed between the vibration member 100 and the back cover 500 to surround the first connection member 210. The second connection member 220 may be disposed or coupled between the rear peripheral portion of the vibration member 100 and the back cover 500 to surround the first connection member 210. For example, the second connection member 220 may be disposed on the outside (or outside) of the first connection member 210 and may be surrounded by the back cover 500. The second connection member 220 may be configured to have a hardness greater than that of the first connection member 210, such as a modulus (or Young's modulus). For example, the second connection member 220 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 embodiments of the present disclosure are not limited thereto.

[0156] The connection member 200 according to another embodiment of the present disclosure can absorb the sound generated and input based on the vibration of the vibration member 100 by the first connection member 210, which is relatively soft and is disposed inward from the relatively hard second connection member 220, and thus can further minimize the reflected sound (or reflected wave) generated by reflection from the connection member 200. Therefore, each of the highest sound pressure level and the lowest sound pressure level generated in the reproduction frequency band of the sound generated based on the vibration of the vibration member 100 can be reduced, and thus the flatness of the sound pressure level can be further enhanced.

[0157] Reference Figures 2 to 4 , the back cover 500 according to an embodiment of the present disclosure may include a first back cover 510 and a second back cover 520 .

[0158] The first rear cover 510 may be disposed in parallel with the vibration member 100. The first rear cover 510 may be disposed to face the second surface 100b of the vibration member 100. The first rear cover 510 may be disposed to cover the second surface 100b of the vibration member 100. The first rear cover 510 may be spaced apart from the second surface 100b of the vibration member 100. For example, the first rear cover 510 may be spaced apart from the second surface 100b of the vibration member 100 with a gap space 10s between the first rear cover 510 and the second surface 100b of the vibration member 100.

[0159] The first back cover 510 may be configured to cover the vibration device 300. The first back cover 510 may be spaced apart from the vibration device 300. For example, the first back cover 510 may be configured to cover the first vibration device 300-1 and the second vibration device 300-2. For example, the first back cover 510 may be spaced apart from the rear surface of each of the first vibration device 300-1 and the second vibration device 300-2.

[0160] The first back cover 510 according to an embodiment of the present disclosure may include a plate shape or a flat plate shape. For example, the first back cover 510 may be an inner cover, an inner plate, a first back plate, a first support plate, a housing plate or a first support member, etc., but the embodiments of the present disclosure are not limited thereto.

[0161] The second back cover 520 may be arranged to face the first back cover 510. The second back cover 520 may be configured or arranged at the rear surface of the first back cover 510. The second back cover 520 may be arranged to cover the rear surface of the first back cover 510. The second back cover 520 may be spaced apart from the rear surface of the first back cover 510. For example, the second back cover 520 may be spaced apart from the rear surface of the first back cover 510, with an air gap 500s between the second back cover 520 and the rear surface of the first back cover 510. For example, the second back cover 520 may be an outer cover, an outer plate, a second rear plate, a last cover, a machine cover, or a second supporting member, etc., but embodiments of the present disclosure are not limited thereto.

[0162] According to an embodiment of the present disclosure, the first back cover 510 and the second back cover 520 may be connected (or coupled) to each other. The second back cover 520 may be connected (or coupled) to the first back cover 510 through a coupling member 530. For example, the second back cover 520 may be partially connected (or coupled) to the first back cover 510 through a coupling member 530.

[0163] The coupling member 530 may be disposed (or inserted) between the first rear cover 510 and the second rear cover 520. For example, the coupling member 530 may be disposed (or inserted) between the peripheral portion of the first rear cover 510 and the peripheral portion of the second rear cover 520. For example, the coupling member 530 may be disposed (or inserted) between the rear peripheral portion of the first rear cover 510 and the front peripheral portion of the second rear cover 520. For example, the coupling member 530 may be a connection member, a plate connection member, a second connection member, a cover connection member, a cover coupling member, or an adhesive member, but embodiments of the present disclosure are not limited thereto.

[0164] The coupling member 530 may be partially disposed (or inserted) between a middle portion of the first back cover 510 excluding a peripheral portion of the first back cover 510 and a middle portion of the second back cover 520 excluding a peripheral portion of the second back cover 520. Therefore, the coupling member 530 may prevent physical contact (or friction) between the middle portion of the first back cover 510 and the middle portion of the second back cover 520, and thus may prevent the occurrence of noise (or noise) caused by the physical contact (or friction) between the first back cover 510 and the second back cover 520.

[0165] The device 10 or the back cover 500 according to another embodiment of the present disclosure may further include a connection frame 540 .

[0166] The connecting frame 540 may be configured to cover or surround the side surface 100c of the vibration member 100 and the side surface of the back cover 500. The connecting frame 540 may be configured to surround the side surface of the first back cover 510, the side surface of the second back cover 520, and the side surface 100c of the vibration member 100, respectively. The connecting frame 540 may be configured to provide an air gap 500s between the first back cover 510 and the second back cover 520. For example, the connecting frame 540 may be configured to provide an air gap 500s between the first back cover 510 and the second back cover 520, and is configured to cover or surround the side surface 100c of the back cover 500 and the vibration member 100. For example, the connecting frame 540 may be accommodated (or inserted) between the first back cover 510 and the second back cover 520, and may be configured to surround each of the side surface 100c of the first back cover 510, the side surface of the second back cover 520, and the vibration member 100. The connection frame 540 may be connected to each of the first and second rear covers 510 and 520 by a coupling member 530. For example, the connection frame 540 may be a middle frame, a support frame, a cover frame, a side cover frame, a side wall cover frame, a side cover, or a side wall cover, but embodiments of the present disclosure are not limited thereto.

[0167] The air gap 500s between the first back cover 510 and the second back cover 520 may be surrounded by the first back cover 510, the second back cover 520, and the connection frame 540. For example, the air gap 500s may be a second space, a gap space, a second gap space, an air space, a sound space, a sound box, or a sealed space, etc., but embodiments of the present disclosure are not limited thereto.

[0168] The connection frame 540 according to an embodiment of the present disclosure may further include a first frame portion 541 and a second frame portion 542 .

[0169] The first frame portion 541 may be configured to be accommodated (or inserted) between the first back cover 510 and the second back cover 520. The first frame portion 541 may be accommodated (or inserted) between the first back cover 510 and the second back cover 520 to overlap with the peripheral portion of each of the first back cover 510 and the second back cover 520. The first frame portion 541 may be disposed (or inserted) between the rear peripheral portion of the first back cover 510 and the front peripheral portion of the second back cover 520. For example, the first frame portion 541 may be connected (or coupled) to the rear peripheral portion of the first back cover 510 and the front peripheral portion of the second back cover 520. For example, the first frame portion 541 may be accommodated (or inserted) between the first back cover 510 and the second back cover 520, and thus the air gap 500s may be disposed (or formed) between the first back cover 510 and the second back cover 520. The air gap 500s may be surrounded by the first back cover 510, the second back cover 520, and the first frame portion 541.

[0170] The first frame portion 541 according to an embodiment of the present disclosure may have a quadrilateral belt (or belt or frame) shape including an opening portion. The opening portion of the first frame portion 541 may overlap with the middle portion of the first rear cover 510 instead of the rear peripheral portion of the first rear cover 510. For example, the first frame portion 541 may be a first connecting frame, a first supporting portion, or a first supporting frame, but embodiments of the present disclosure are not limited thereto.

[0171] The second frame portion 542 may be connected to the side surface of the first frame portion 541. For example, the second frame portion 542 may be connected to the outer side surface of the first frame portion 541. The second frame portion 542 may be connected to the outer side surface of the first frame portion 541 to surround or cover each of the side surface 100c of the vibration member 100, the side surface of the first back cover 510, and the side surface of the second back cover 520. The second frame portion 542 may be integrated into the first back cover 510. For example, the first frame portion 541 and the second frame portion 542 may be integrated (or configured) as one body (or a single body). For example, based on the coupling structure of the first frame portion 541 and the second frame portion 542, the connection frame 540 may have a cross-sectional structure of a "┣" shape or a "┤" shape, but the embodiments of the present disclosure are not limited thereto. For example, the second frame portion 542 may be a second connection frame, a second support portion, a second support frame, or a sidewall frame, but the embodiments of the present disclosure are not limited thereto.

[0172] The first frame portion 541 may be connected to each of the first and second rear covers 510 and 520 through a coupling member 530. The coupling member 530 according to an embodiment of the present disclosure may include a first coupling member 531 and a second coupling member 532.

[0173] The first coupling member 531 may be configured to connect (or couple) the first rear cover 510 and the connecting frame 540. The first coupling member 531 may be disposed (or configured) between the first rear cover 510 and the first frame portion 541 of the connecting frame 540. The second coupling member 532 may be configured to connect (or couple) the second rear cover 520 and the connecting frame 540. The second coupling member 532 may be disposed (or configured) between the second rear cover 520 and the first frame portion 541 of the connecting frame 540. For example, the first coupling member 531 may be a first cover coupling member, a first connecting member, or a panel connecting member, but embodiments of the present disclosure are not limited thereto. For example, the second coupling member 532 may be a second cover coupling member, a second cover connecting member, or a plate connecting member, but embodiments of the present disclosure are not limited thereto.

[0174] Each of the first coupling member 531 and the second coupling member 532 may include a material having elasticity for vibration absorption (or shock absorption). For example, each of the first coupling member 531 and the second coupling member 532 may be configured as a polyurethane material or a polyolefin material, but embodiments of the present disclosure are not limited thereto. For example, each of the first coupling member 531 and the second coupling member 532 may include one or more of a double-sided tape, a double-sided foam tape, and a double-sided buffer tape, but embodiments of the present disclosure are not limited thereto.

[0175] The device 10 or the back cover 500 according to an embodiment of the present disclosure may further include a hole portion 550 .

[0176] The hole portion 550 may be configured to reduce the internal air pressure of the device 10. For example, the hole portion 550 may be configured to reduce the air pressure of the internal space of the device 10 or the air pressure of the gap space 10s provided between the vibration member 100 and the back cover 500. For example, the hole portion 550 may be configured to tune the sound characteristics in the middle and low-pitched vocal range.

[0177] The hole portion 550 may be disposed at the back cover 500. The hole portion 550 may be disposed at a specific area or a partial area of ​​the back cover 500. The hole portion 550 may be formed to pass through or vertically pass through the back cover 500. Therefore, the internal space of the device 10 or the gap space 10s provided between the vibration member 100 and the back cover 500 may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the hole portion 550, and thus the air pressure of the internal space of the device 10 or the air pressure of the gap space 10s provided between the vibration member 100 and the back cover 500 may be reduced. For example, the gap space 10s provided to be surrounded between the vibration member 100 and the back cover 500 by the connecting member 200 may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the hole portion 550.

[0178] The hole portions 550 may each be a path through which the sound generated based on the vibration of the vibration member 100 (or the vibration device 300) is output in the backward direction (or second sound output direction) SOD2 of the device 10 or the back cover 500. The sound generated based on the vibration of the vibration member 100 (or the vibration device 300) may be output in the forward direction SOD1 of the vibration member 100, and may be output in the backward direction SOD2 of the device 10 or the back cover 500 through the hole portion 550. For example, the sound output in the forward direction SOD1 of the vibration member 100 may be a first sound (or forward sound or front output sound) S1. For example, the sound output in the backward direction SOD2 of the device 10 or the back cover 500 may be a second sound (or backward sound or rear output sound) S2. Therefore, the device 10 according to an embodiment of the present disclosure may output sounds S1 and S2 in each of the forward direction SOD1 and the backward direction SOD2. For example, the hole portion 550 can be a vent portion, a ventilation hole portion, a sound hole portion, a rear sound hole portion, a rear sound output portion, a hole arrangement portion, a hole pattern portion, an air duct portion, an air inlet portion, an air inlet and outlet portion, an air discharge portion, or an air pressure control portion, but the embodiments of the present disclosure are not limited thereto.

[0179] According to an embodiment of the present disclosure, the hole portion 550 can communicate (or connect) the internal space (or gap space 10s) of the device 10 with the external space to reduce the air pressure of the internal space (or gap space 10s), and thus the hole portion 550 can expand the frequency band of the low-pitched vocal band of the sound generated based on the vibration of the vibration member 100, thereby improving the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal band. For example, the air pressure (or pressure) of the internal space (or gap space 10s) of the device 10 can be reduced by the hole portion 550, and thus the displacement (or bending force) of the vibration member 100 or the vibration device 300 can be increased, and thus the frequency band of the low-pitched vocal band can be expanded, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal band. For example, the low-pitched vocal band can be 300 Hz or lower or 500 Hz or lower, but the embodiments of the present disclosure are not limited thereto.

[0180] According to another embodiment of the present disclosure, in a device in which the hole portion 550 is not configured at the rear cover 500 and has an internal space (or gap space 10s), based on the vibration of the vibration member 100 (or the vibration device 300), the maximum pressure change can occur in the internal space (or gap space 10s) with the largest volume change, and thus the displacement (or bending force) of the vibration member 100 (or the vibration device 300) can be reduced, so that the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords can be reduced or lowered. The internal space (or gap space 10s) in which the hole portion 550 is not configured at the rear cover 500 can be a closed internal space (or gap space 10s). For example, in a device including a closed internal space (or gap space 10s), the pressure (or air pressure) of the internal space (or gap space 10s) can be increased based on the sound waves or sounds generated by the vibration of the vibration member 100 (or vibration device 300), and thus the displacement (or bending force) of the vibration member 100 (or vibration device 300) can be reduced, so that the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords can be reduced or lowered.

[0181] The hole portion 550 may be configured at the back cover 500 to overlap with the vibration device 300. The hole portion 550 may be configured in the area of ​​the back cover 500 that overlaps with the vibration device 300, but the embodiments of the present disclosure are not limited thereto. For example, the hole portion 550 may also be configured in the area of ​​the back cover 500 that overlaps with the peripheral area of ​​the vibration device 300. The vibration device 300 may overlap with a portion of the hole portion 550. A portion of the hole portion 550 may overlap with the vibration device 300, and another portion (or remaining portion) of the hole portion 550 may overlap with the vibration member 100 disposed at the periphery of the vibration device 300. For example, the size of the hole portion 550 may be larger than the size of the vibration device 300. The hole portion 550 may be formed to pass through or vertically pass through the back cover 500 in the thickness direction of the back cover 500 or in the third direction Z (or Z-axis direction).

[0182] The hole portion 550 may be disposed at the first back cover 510 and the second back cover 520 of the back cover 500 to overlap with the vibration device 300. The hole portion 550 may be formed to pass through or vertically pass through each of the first back cover 510 and the second back cover 520 in the thickness direction or the third direction Z (or Z-axis direction) of the back cover 500. For example, the hole portion 550 may include a plurality of holes disposed at the back cover 500. For example, the hole portion 550 may include a plurality of holes disposed at each of the first back cover 510 and the second back cover 520 of the back cover 500.

[0183] The hole portion 550 according to an embodiment of the present disclosure may include a first hole portion 551 and a second hole portion 552 .

[0184] The first hole portion 551 and the second hole portion 552 may overlap each other. For example, the gap space 10s may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the first hole portion 551 and the second hole portion 552. The first hole portion 551 and the second hole portion 552 may be configured to overlap with the air gap 500s therebetween. For example, the air gap 500s may be connected (or communicated) with the gap space 10s through the first hole portion 551, and may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the second hole portion 552. For example, the gap space 10s may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the first hole portion 551, the air gap 500s and the second hole portion 552.

[0185] The first hole portion 551 may be configured at the first back cover 510 to overlap with the vibration device 300. The vibration device 300 may overlap with a portion of the first hole portion 551. The portion of the first hole portion 551 may overlap with the vibration device 300, and another portion (or remaining portion) of the first hole portion 551 may overlap with the vibration member 100 at the periphery of the vibration device 300. For example, the size of the first hole portion 551 may be larger than the size of the vibration device 300. For example, the first hole portion 551 may be an upper hole portion, an inner hole portion, a first vent portion, a first sound hole portion, or a first rear sound output portion, but embodiments of the present disclosure are not limited thereto.

[0186] The first hole portion 551 may connect (or communicate) the gap space 10s and the air gap 500s of the back cover 500. For example, the gap space 10s may be connected (or communicate) with the air gap 500s through the first hole portion 551.

[0187] The first hole portion 551 may include a plurality of first holes 551h. The plurality of first holes 551h may overlap with the vibration device 300. For example, some of the plurality of first holes 551h may overlap with the vibration device 300, and the other holes (or remaining holes) in the plurality of first holes 551h may overlap with the vibration member 100 at the periphery of the vibration device 300. Each of the plurality of first holes 551h may be formed to pass through or vertically pass through the first back cover 510 along the third direction Z (or Z-axis direction) or the thickness direction of the first back cover 510. Therefore, the gap space 10s may be connected (or communicated) with the air gap 500s through the plurality of first holes 551h. Therefore, the sound (or second sound S2) generated based on the vibration of the vibration member 100 (or the vibration device 300) may be output in the air gap 500s through the first hole portion 551 or the plurality of first holes 551h. For example, the plurality of first holes 551h may have a circular shape with a diameter of 1.5 mm to 3 mm, but the embodiments of the present disclosure are not limited thereto. For example, the plurality of first holes 551h may be first vents or first sound holes, etc., but the embodiments of the present disclosure are not limited thereto.

[0188] The first hole portion 551 according to an embodiment of the present disclosure may include a first hole region 551 a and a second hole region 551 b .

[0189] The first hole region (or first upper hole portion) 551a may be configured at the first back cover 510 to overlap with the first vibration device 300-1 of the vibration device 300. The first hole region 551a may include a plurality of first holes 551h. The plurality of first holes 551h disposed at the first hole region 551a may overlap with the first vibration device 300-1. For example, the size of the first hole region 551a may be greater than the size of the first vibration device 300-1. For example, some of the plurality of first holes 551h disposed at the first hole region 551a may overlap with the first vibration device 300-1, and the other holes (or remaining holes) of the plurality of first holes 551h may overlap with the vibration member 100 at the periphery of the first vibration device 300-1. The gap space 10s at the periphery of the first vibration device 300-1 may be connected (or communicated) with the air gap 500s through the first hole region 551a. Therefore, the sound (or the second sound S2 ) generated based on the vibration of the first vibration device 300 - 1 may be output in the air gap 500 s through the first hole region 551 a or the plurality of first holes 551 h .

[0190] The second hole area (or second upper hole portion) 551b may be configured at the first back cover 510 to overlap with the second vibration device 300-2 of the vibration device 300. The second hole area 551b may include a plurality of first holes 551h. The plurality of first holes 551h disposed at the second hole area 551b may overlap with the second vibration device 300-2. For example, the size of the second hole area 551b may be greater than the size of the second vibration device 300-2. For example, some of the plurality of first holes 551h disposed at the second hole area 551b may overlap with the second vibration device 300-2, and the other holes (or remaining holes) of the plurality of first holes 551h may overlap with the vibration member 100 at the periphery of the second vibration device 300-2. The gap space 10s at the periphery of the second vibration device 300-2 may be connected (or communicated) with the air gap 500s through the second hole area 551b. Therefore, the sound (or the second sound S2 ) generated based on the vibration of the second vibration device 300 - 2 may be output in the air gap 500 s through the second hole region 551 b or the plurality of first holes 551 h .

[0191] The second hole portion 552 may be configured at the second back cover 520 to overlap with the vibration device 300. The second hole portion 552 may be configured at the second back cover 520 to overlap with the first hole portion 551. For example, the second hole portion 552 may be configured at the second back cover 520 to face the first hole portion 551, wherein there is an air gap 500s between the second hole portion 552 and the first hole portion 551. For example, the first hole portion 551 may be disposed (or configured) between the vibration device 300 and the second hole portion 552. For example, the second hole portion 552 may be configured to have the same size and the same structure as the first hole portion 551. For example, the second hole portion 552 may be a lower hole portion, an outer hole portion, a second vent portion, a second sound hole portion, or a second rear sound output portion, but the embodiments of the present disclosure are not limited thereto.

[0192] The second hole portion 552 may include a plurality of second holes 552h. The plurality of second holes 552h may overlap with the vibration device 300. Each of the plurality of second holes 552h may overlap with each of the plurality of first holes 551h configured at the first hole portion 551. The plurality of second holes 552h may overlap with the plurality of first holes 551h individually. Each of the plurality of second holes 552h may be formed to pass through or vertically pass through the second back cover 520 along a third direction Z (or Z-axis direction) or the thickness direction of the second back cover 520. Therefore, the air gap 500s may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the second hole portion 552 or the plurality of second holes 552h. Therefore, the sound (or second sound S2) generated based on the vibration of the vibration member 100 (or the vibration device 300) can be output in the rear space of the back cover 500 (or the external space of the device 10) through the first hole portion 551 (or multiple first holes 551h), the air gap 500s and the second hole portion 552 (or multiple second holes 552h). For example, the multiple second holes 552h may have a circular shape with a diameter of 1.5mm to 3mm, but the embodiments of the present disclosure are not limited thereto. For example, the multiple second holes 552h may have a circular shape with the same diameter as the multiple first holes 551h, but the embodiments of the present disclosure are not limited thereto. For example, the multiple second holes 552h may be a second vent hole or a second sound hole, etc., but the embodiments of the present disclosure are not limited thereto.

[0193] The second hole portion 552 according to an embodiment of the present disclosure may include a first hole region 552 a and a second hole region 552 b .

[0194] The first hole area (or the first lower hole area or the third area) 552a can be configured at the second back cover 520 to overlap with the first hole area 551a of the first hole portion 551. The first hole area 552a may include a plurality of second holes 552h. Each of the plurality of second holes 552h disposed at the first hole area 552a may be configured at the second back cover 520 to overlap with each of the plurality of first holes 551h disposed at the first hole area 551a. The plurality of second holes 552h may overlap with the plurality of first holes 551h individually. The air gap 500s may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the first hole area 552a or the plurality of second holes 552h. Therefore, the gap space 10s at the periphery of the first vibration device 300-1 can be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the first hole area 551a (or multiple first holes 551h), the air gap 500s, and the first hole area 552a (or multiple second holes 552h). Therefore, the sound (or the second sound S2) generated based on the vibration of the first vibration device 300-1 can be output in the rear space of the back cover 500 (or the external space of the device 10) through the first hole area 551a (or multiple first holes 551h) of the first hole portion 551, the air gap 500s, and the first hole area 552a (or multiple second holes 552h) of the second hole portion 552.

[0195] The second hole area (or second lower hole area or fourth area) 552b can be configured at the second back cover 520 to overlap with the second hole area 551b of the first hole portion 551. The second hole area 552b may include a plurality of second holes 552h. Each of the plurality of second holes 552h disposed at the second hole area 552b may be configured at the second back cover 520 to overlap with each of the plurality of first holes 551h disposed at the second hole area 551b. The plurality of second holes 552h may overlap with the plurality of first holes 551h individually. The air gap 500s may be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the second hole area 552b or the plurality of second holes 552h. Therefore, the gap space 10s at the periphery of the second vibration device 300-2 can be connected (or communicated) with the rear space of the back cover 500 (or the external space of the device 10) through the second hole area 551b (or multiple first holes 551h), the air gap 500s, and the second hole area 552b (or multiple second holes 552h). Therefore, the sound (or second sound S2) generated based on the vibration of the second vibration device 300-2 can be output in the rear space of the back cover 500 (or the external space of the device 10) through the second hole area 551b (or multiple first holes 551h) of the first hole portion 551, the air gap 500s, and the second hole area 552b (or multiple second holes 552h) of the second hole portion 552.

[0196] Therefore, the device 10 according to an embodiment of the present disclosure can output sounds S1 and S2 in each of the forward direction SOD1 and the backward direction SOD2 of the vibration member 100 (or the display panel 110) through the vibration of the vibration member 100 based on the displacement (or driving or vibration) of the vibration device 300.

[0197] The back cover 500 according to an embodiment of the present disclosure may further include a cable hole 511 .

[0198] The cable hole 511 may be configured at the back cover 500 to be adjacent to the vibration device 300. The cable hole 511 may be configured at the back cover 500 to be adjacent to the hole portion 550. The cable hole 511 may be formed to pass through or vertically pass through the back cover 500. The cable hole 511 may have a size and shape that enables the signal cable 350 of the vibration device 300 to pass through. One side of the signal cable 350 may be connected to the vibration device 300, and the other side of the signal cable 350 may pass through the cable hole 511, and may be pulled out (or extended) to the rear surface of the back cover 500 to be connected to the sound circuit board.

[0199] The cable hole 511 may include a first cable hole 511a disposed at the first rear cover 510 and a second cable hole 511b disposed at the second rear cover 520 and overlapping with the first cable hole 511a. Therefore, the signal cable 350 connected to the vibration device 300 may pass through the first cable hole 511a and the second cable hole 511b, and may be pulled out (or extended) to the rear surface of the rear cover 500.

[0200] The cable hole 511 may be a path through which sound generated based on the vibration of the vibration member 100 (or the vibration device 300) is output in the rearward direction (or second sound output direction) SOD2 of the device 10 or the rear cover 500. For example, the cable hole 511 may be a cable outlet port, a cable outlet hole, a signal line outlet port, an opening, or a pipe, but embodiments of the present disclosure are not limited thereto.

[0201] Reference Figure 2 and Figure 4 , the device 10 according to an embodiment of the present disclosure may further include a partition member 600 .

[0202] The partition member 600 may be disposed (or configured) between the vibration member 100 and the back cover 500. The partition member 600 may be disposed (or configured) to separate the first area A1 from the second area A2 of the vibration member 100. The partition member 600 may be disposed (or configured) between the back cover 500 and a boundary portion BP of the first area A1 and the second area A2 of the vibration member 100.

[0203] The separation member 600 may be configured to limit (or define) the vibration region of the vibration member 100 based on the vibration (or displacement or drive) of the vibration device 300. For example, the separation member 600 may limit the vibration region of the vibration member 100, and thus the separation member 600 may reduce the resonance frequency of the vibration member 100 and / or the vibration device 300. For example, the vibration region of the vibration member 100 limited by the separation member 600 may be used as the stiffness (or spring constant) and mass (or weight) of the vibration member 100 and / or the vibration device 300. For example, the vibration region of the vibration member 100 limited by the separation member 600 may reduce the stiffness (or spring constant) of the vibration member 100 and / or the vibration device 300, and may increase the mass (or weight) of the vibration member 100 and / or the vibration device 300, and thus the resonance frequency of the vibration member 100 and / or the vibration device 300 may be reduced. Therefore, the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the vibration member 100 may be further enhanced.

[0204] The partition member 600 can separate the vibration (or sound) generated in the first area A1 of the vibration member 100 from the vibration (or sound) generated in the second area A2 of the vibration member 100 or can minimize or prevent the mutual interference of the vibration (or sound) generated in the first area A1 of the vibration member 100 and the vibration (or sound) generated in the second area A2 of the vibration member 100. The left sound and the right sound generated based on the vibration of the first area A1 and the second area A2 of the vibration member 100 can be separated from each other by the partition member 600, and thus the sound output characteristics of the device 10 can be further enhanced, and the sound of the 2-channel sound including the separation based on the left sound and the right sound can be output in the forward direction SOD1 of the vibration member 100 and the backward direction SOD2 of the back cover 500, respectively. For example, the partition member 600 can be a partition, a sound blocking member, a sound separation member, a space separation member, a housing or a baffle, etc., but the embodiments of the present disclosure are not limited thereto.

[0205] The partition member 600 according to an embodiment of the present disclosure may include one or more protrusions (or second protrusions) 600p. For example, the one or more protrusions 600p may be a protrusion pattern, but the embodiment of the present disclosure is not limited thereto.

[0206] One or more protrusions 600p may protrude from the side surface (or outer surface) of the partition member 600. For example, one or more protrusions 600p may protrude from one or more of the first side surface (or first side wall) and the second side surface (or second side wall) of the partition member 600 toward the side surface (or side wall) of the vibration device 300.

[0207] According to one or more protrusions 600p of the embodiment of the present disclosure, it can have a triangular shape or a sawtooth shape, but the embodiment of the present disclosure is not limited thereto. One or more protrusions 600p can absorb or capture the reflected wave generated by the reflection of the separation member 600, and thus can prevent or minimize the reduction of the sound pressure level characteristics caused by the standing wave generated by the interference of the reflected wave and the traveling wave. For example, the reflected wave reflected from the separation member 600 based on the vibration of the vibration member 100 can be dispersed or reflected by one or more protrusions 600p, and thus can prevent or minimize the overlap and interference phenomenon between the reflected wave and the traveling wave, thereby preventing or minimizing the occurrence of standing waves. Therefore, each of the highest sound pressure level and the lowest sound pressure level generated in the reproduction frequency band of the sound generated by the vibration of the vibration member 100 can be further reduced, and thus the flatness of the sound pressure level can be further enhanced.

[0208] Reference Figure 3 , the device 10 according to an embodiment of the present disclosure may further include a plate 180 .

[0209] The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be adjacent to the vibration device 300. The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the cable hole 511. The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be spaced apart from the back cover 500. The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be spaced apart from the cable hole 511. The plate 180 may be spaced apart from the vibration device 300. For example, the size of the plate 180 may be larger than the size of the cable hole 511. For example, the plate 180 may cover the cable hole 511 and overlap with some of the plurality of first holes 551h of the hole portion 550. For example, the plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the signal cable 350 of the vibration device 300 and may be spaced apart from the cable hole 511.

[0210] The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be adjacent to each of the first vibration device 300-1 and the second vibration device 300-2. For example, the plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the cable hole 511 adjacent to the first vibration device 300-1, and may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the cable hole 511 adjacent to the second vibration device 300-2.

[0211] The plate 180 may be configured to dissipate or disperse the heat concentrated in the cable hole 511 to the vibration member 100. For example, the heat generated by driving the vibration device 300 or from the display panel 110 may be released (or dissipated) to the outside through the cable hole 511 based on the airflow, and thus the temperature around the cable hole 511 may rise (or increase). Therefore, the temperature in the portion of the vibration member 100 overlapping with the cable hole 511 may rise (or increase) based on the temperature around the cable hole 511. For example, when the vibration member 100 includes the display panel 110, the temperature in a portion (or a local area) of the display panel 110 overlapping with the cable hole 511 may rise (or increase) based on the temperature around the cable hole 511, and thus due to the rapid temperature difference in this portion of the display panel 110, image quality defects of the display panel 110 may occur. Thus, the plate 180 can minimize or prevent image quality defects of the display panel 110 caused by a rapid temperature difference in a portion (or local area) of the display panel 110 by diffusing (or dispersing or spreading) the heat around the cable hole 511 into a wide area of ​​the vibration member 100.

[0212] The plate 180 may be configured as a metal material. For example, the plate 180 may be configured as a metal material having a higher thermal conductivity than the vibration member 100. For example, the plate 180 may be configured as a metal material having a higher thermal conductivity than the packaging member 113 of the display panel 110. For example, the plate 180 may be made of aluminum (Al), copper (Cu) or silver (Ag) and alloys thereof, but embodiments of the present disclosure are not limited thereto. For example, the plate 180 may be a metal plate, a metal sheet, a heat sink, a heat sink, a heat sink, a heat diffusion sheet or an aluminum sheet, but embodiments of the present disclosure are not limited thereto.

[0213] Figure 6 A first rear cover and a first hole portion of the hole portion according to an embodiment of the present disclosure are shown.

[0214] Reference Figure 4 and Figure 6 , the first hole portion 551 of the hole portion 550 according to the embodiment of the present disclosure may include a first hole area 551 a and a second hole area 551 b .

[0215] The first hole region 551a may be disposed close to the periphery within the first area A1 of the vibration member 100. For example, the first hole region 551a may be disposed close to the periphery within the first area A1 of the vibration member 100 relative to the first direction X. For example, in order to minimize vibration interference between the first area A1 and the second area A2 of the vibration member 100, the center portion CP1 of the first hole region 551a may be spaced apart from the center portion CP2 of the first area A1 of the vibration member 100 toward the periphery of the first area A1. For example, the center portion CP1 of the first hole region 551a may be located between the center portion CP2 of the first area A1 of the vibration member 100 and the first short side of the vibration member 100.

[0216] The central portion CP3 of the first vibration device 300-1 overlapping the first hole area 551a may be spaced apart from the central portion CP1 of the first hole area 551a, but the embodiments of the present disclosure are not limited thereto. For example, the central portion CP3 of the first vibration device 300-1 may overlap with the central portion CP1 of the first hole area 551a or may be aligned with the central portion CP1 of the first hole area 551a.

[0217] The first hole region 551a may include a plurality of first holes 551h. The plurality of first holes 551h may be configured to have a specific interval (or spacing) P1 at the first hole region 551a. For example, the plurality of first holes 551h may be configured to have a specific interval P1 in each of the first direction X and the second direction Y. For example, the plurality of first holes 551h may be configured to have a lattice shape (or grid shape) with a predetermined interval P1. For example, the interval (or spacing) P1 between the plurality of first holes 551h may be the shortest distance or distance between the central portions of two adjacent holes 551h. The plurality of first holes 551h may have the same size (or diameter) D1, but embodiments of the present disclosure are not limited thereto. The size D1 of each of the plurality of first holes 551h may be smaller than the interval (or spacing) P1 between the plurality of first holes 551h, but embodiments of the present disclosure are not limited thereto.

[0218] According to an embodiment of the present disclosure, in the case where the plurality of first holes 551h overlapping with the vibration device 300 or located on the rear surface of the vibration device 300 are not fully ensured, the impedance of the rear sound (or the second sound) may increase, and thus the sound pressure level characteristics of the mid-low tone vocal cord may be reduced. Therefore, the first hole area 551a may have a hole opening rate of 33% or more to reduce the impedance of the rear sound, thereby enhancing the sound pressure level characteristics of the mid-low tone vocal cord. For example, the hole opening rate may correspond to the number of holes 551h with a predetermined size configured in the first hole area 551a. For example, the case where the plurality of holes 551h with a size D1 and an interval P1 are maximally configured (or arranged) in the first hole area 551a may represent a hole opening rate of 100%. Therefore, in the case where the plurality of first holes 551h overlapping with the vibration device 300 or located on the rear surface of the vibration device 300 have a hole opening rate of 33% or more, the impedance of the rear sound can be reduced, and thus the sound pressure level characteristics of the mid-low tone vocal cord can be enhanced.

[0219] The second hole region 551b may be disposed close to the periphery within the second area A2 of the vibration member 100. For example, the second hole region 551b may be disposed close to the periphery within the second area A2 of the vibration member 100 relative to the first direction X. For example, in order to minimize the vibration interference between the first area A1 and the second area A2 of the vibration member 100, the center portion CP1 of the second hole region 551b may be spaced apart from the center portion CP2 of the second area A2 of the vibration member 100 toward the periphery of the second area A2. For example, the center portion CP1 of the second hole region 551b may be located between the center portion CP2 of the second area A2 of the vibration member 100 and the second short side of the vibration member 100.

[0220] The central portion CP3 of the second vibration device 300-2 overlapping the second hole area 551b may be spaced apart from the central portion CP1 of the second hole area 551b, but the embodiments of the present disclosure are not limited thereto. For example, the central portion CP3 of the second vibration device 300-2 may overlap with the central portion CP1 of the second hole area 551b or may be aligned with the central portion CP1 of the second hole area 551b.

[0221] The second hole region 551b may include a plurality of first holes 551h. The plurality of first holes 551h may be arranged at a specific interval (or pitch) P1 at the second hole region 551b. For example, the plurality of first holes 551h may be arranged at a specific interval P1 in each of the first direction X and the second direction Y.

[0222] The back cover 500 according to an embodiment of the present disclosure may further include a first cable hole 511 a .

[0223] The first cable hole 511a may be configured at the first rear cover 510 to be adjacent to the first hole portion 551. The first cable hole 511a may be configured at the first rear cover 510 to be adjacent to the lower side of each of the first hole area 551a and the second hole area 551b. The signal cable 350 of the vibration device 300 may be pulled out (or extended) to the rear surface of the first rear cover 510 through the first cable hole 511a in the gap space 10s between the vibration member 100 and the first rear cover 510. For example, the first cable hole 511a may be a cable lead-out port, a cable lead-out hole, a signal line lead-out port, an opening or a pipe, but embodiments of the present disclosure are not limited thereto.

[0224] The device 10 according to an embodiment of the present disclosure may further include an insulating member 170 .

[0225] The insulating member 170 may be configured to prevent an electrical short circuit between the driving circuit portion 150 and the second back cover 520 of the back cover 500. The insulating member 170 may be configured to cover the driving circuit portion 150 disposed at a rear peripheral portion of the vibration member 100. The insulating member 170 may be disposed (or configured) between a rear peripheral portion of the vibration member 100 and the second back cover 520 to cover the driving circuit portion 150. For example, the insulating member 170 may be disposed (or configured) between a rear peripheral portion of the base member 111 of the display panel 110 and the second back cover 520 to cover the driving circuit portion 150. For example, the insulating member 170 may be configured to cover one or more PCBs 155 disposed at a rear peripheral portion of the vibration member 100. For example, the insulating member 170 may be configured to cover the other portions (or remaining portions) of the one or more PCBs 155 except for the connector 155a at the one or more PCBs 155. For example, the insulating member 170 may include an electrically insulating material. For example, the insulating member 170 may be an insulating pad, an insulating sheet, or an insulating tape, but embodiments of the present disclosure are not limited thereto.

[0226] Figure 7 A second rear cover and a second hole portion of the hole portion according to an embodiment of the present disclosure are shown. Figure 8 yes Figure 7 An enlarged view of 'B' is shown.

[0227] Reference Figure 4 and Figure 7 , the second back cover 520 of the back cover 500 according to the embodiment of the present disclosure may include a flat portion 521 and a rigid portion 522 .

[0228] The flat portion 521 may be configured in parallel with the first rear cover 510 of the rear cover 500. For example, an edge portion (or peripheral portion) of the second rear cover 520 may be configured as the flat portion 521. The flat portion 521 may be coupled to the coupling member 530. For example, the flat portion 521 may be a bottom plate portion, a bottom plate, or a cover plate, but embodiments of the present disclosure are not limited thereto.

[0229] The rigid portion 522 may protrude from the flat portion 521 in the rearward direction of the back cover 500, and thus may increase the rigidity of the device 10 or the back cover 500. For example, the rigid portion 522 may be configured to be recessed from the front surface of the flat portion 521 facing the first back cover 510. For example, the rigid portion 522 may be used to increase the rigidity of the device 10 or the back cover 500, and may be configured in various shapes, but is not limited to Figure 7 For example, the rigid portion 522 may be a formed portion, a protruding portion, or a recessed portion, but embodiments of the present disclosure are not limited thereto.

[0230] The second back cover 520 of the back cover 500 according to the embodiment of the present disclosure may further include a receiving portion 523 .

[0231] The accommodating portion 523 may be configured to accommodate the driving circuit portion 150. The accommodating portion 523 may protrude in the rear direction of the rear cover 500 from a flat portion 521 of an edge portion (or an outer peripheral portion) of the second rear cover 520 overlapping an edge portion (or an outer peripheral portion) of the vibration member 100. Figure 2 As shown in the figure, the plurality of flexible films 151 or one or more PCBs 155 provided at the rear surface of the vibration member 100 may be configured to cover or accommodate. Therefore, the plurality of flexible films 151 or one or more PCBs 155 may be covered or accommodated by the accommodation portion 523 of the second rear cover 520, and thus may be protected from external impacts and may be accommodated by Figure 6 The illustrated insulating member 170 is insulated from the second back cover 520. For example, the receiving portion 523 may be a forming portion, a protruding portion, a circuit receiving portion, or a PCB receiving portion, but embodiments of the present disclosure are not limited thereto.

[0232] The second hole portion 552 of the hole portion 550 according to the embodiment of the present disclosure may include a first hole region 552 a and a second hole region 552 b .

[0233] The first hole area 552a may be configured at the second back cover 520 to overlap with the first hole area 551a of the first hole portion 551. The first hole area 552a may include a plurality of second holes 552h. The plurality of second holes 552h may overlap with the plurality of first holes 551h at the first hole area 551a of the first hole portion 551, respectively. The plurality of second holes 552h may be configured at the flat portion 521 and the rigid portion 522 to overlap with the plurality of first holes 551h at the first hole area 551a of the first hole portion 551, respectively. For example, some of the plurality of second holes 552h may be configured at the flat portion 521, and the other (or remaining) of the plurality of second holes 552h may be configured at the rigid portion 522.

[0234] The second hole area 552b may be configured at the second back cover 520 to overlap with the second hole area 551b of the first hole portion 551. The second hole area 552b may include a plurality of second holes 552h. The plurality of second holes 552h may overlap with the plurality of first holes 551h at the second hole area 551b of the first hole portion 551, respectively. The plurality of second holes 552h may be configured at the flat portion 521 and the rigid portion 522 to overlap with the plurality of first holes 551h at the second hole area 551b of the first hole portion 551, respectively. For example, some of the plurality of second holes 552h may be configured at the flat portion 521, and the other (or remaining) of the plurality of second holes 552h may be configured at the rigid portion 522.

[0235] Reference Figure 4 , Figure 7 and Figure 8 , the back cover 500 or the second back cover 520 according to an embodiment of the present disclosure may include a second cable hole 511 b .

[0236] The second cable hole 511b may be configured at the second rear cover 520 to be adjacent to the second hole portion 552. The second cable hole 511b may be configured at the second rear cover 520 to be adjacent to the lower side of each of the first hole area 552a and the second hole area 552b. The second cable hole 511b may be configured at the second rear cover 520 to overlap with the first cable hole 511a at the first rear cover 510. The signal cable 350 pulled out (or extended) to the rear surface of the first rear cover 510 through the first cable hole 511a may be pulled out (or extended) to the rear surface of the second rear cover 520 through the second cable hole 511b.

[0237] The device 10 according to an embodiment of the present disclosure may further include a sound circuit board 360 .

[0238] The sound circuit board 360 may be disposed at the rear surface of the rear cover 500, and may be configured to apply a drive signal (or an electrical signal or a voice signal) to the vibration device 300. The sound circuit board 360 may be configured to apply a drive signal to the vibration device 300 based on a sound source signal applied from a host system (or a display drive system or a sound drive system). The sound circuit board 360 may be disposed at the rear surface of the rear cover 500, and is connected to the signal cable 350 of the vibration device 300. The sound circuit board 360 may be disposed at the rear surface of the second rear cover 520 to be adjacent to the second cable hole 511b.

[0239] According to an embodiment of the present disclosure, the sound circuit board 360 may be disposed (or fixed) at the rigid portion 522 of the second rear cover 520 adjacent to the second cable hole 511b. For example, in order to minimize the transfer of heat occurring in the sound circuit board 360 to the vibration member 100 through the first rear cover 510, the sound circuit board 360 may be disposed (or fixed) at the rigid portion 522 of the second rear cover 520, which is spaced apart from the first rear cover 510 and has an air gap 500s therebetween.

[0240] The sound circuit board 360 may be connected to the signal cable 350 pulled out (or extended) to the rear surface of the rear cover 500 through the second cable hole 511b. The vibration device 300 embedded in the device 10 may be pulled out (or extended) through the cable hole 511 configured in the rear cover 500, and may be connected to the cable connector 361 of the sound circuit board 360, and thus may vibrate based on a driving signal applied from the sound circuit board 360 through the signal cable 350. For example, the sound circuit board 360 may be an amplifier PCB, an interface board, or a sound driving board, but embodiments of the present disclosure are not limited thereto.

[0241] The device 10 according to an embodiment of the present disclosure may further include a cable fixing member (or a first cable fixing member) 351 .

[0242] The cable fixing member 351 may fix a portion (or a central portion) of the signal cable 350 pulled out or extended to the rear surface of the rear cover 500 through the second cable hole 511b to the rear surface of the second rear cover 520. The cable fixing member 351 may prevent noise caused by vibration or shaking of the signal cable 350 based on sound (or sound waves) output through the plurality of second holes 552h of the second hole portion 552. For example, the cable fixing member 351 may be an insulating tape, but embodiments of the present disclosure are not limited thereto.

[0243] The second rear cover 520 according to an embodiment of the present disclosure may further include a cable lead-out hole (or a third cable hole) 525 .

[0244] The cable lead-out hole 525 may be configured at the second rear cover 520 to overlap with the connector 155a at the one or more PCBs 155. The cable lead-out hole 525 may have a size and shape that enables the one or more signal transfer members 156 to pass therethrough.

[0245] According to an embodiment of the present disclosure, the control board 157 of the driving circuit unit 150 can be set in the middle part of the second rear cover 520 and can be connected to one or more signal transmission components 156 pulled out (or extended) to the rear surface of the rear cover 500 through the cable lead-out hole 525.

[0246] The device 10 according to an embodiment of the present disclosure may further include one or more cable fixing members (or second cable fixing members) 158 .

[0247] One or more cable fixing members 158 may fix a portion (or a central portion) of one or more signal transfer members 156 pulled out (or extended) to the rear surface of the rear cover 500 through the cable lead-out hole 525 to the rear surface of the second rear cover 520. One or more cable fixing members 158 may prevent noise caused by vibration or shaking of one or more signal transfer members 156. For example, one or more cable fixing members 158 may be an insulating tape, but embodiments of the present disclosure are not limited thereto.

[0248] Fig. 9 A vibration member, a vibration device, and a rear surface of a pad member according to an embodiment of the present disclosure are shown. Fig.10 is along Fig. 9 A cross-sectional view taken along line II-II' is shown.

[0249] Reference Fig. 9 and Fig.10 , the device 10 according to an embodiment of the present disclosure may further include a pad member 700 .

[0250] The pad member 700 may be configured to improve the degradation and / or dip phenomenon of the sound quality. The pad member 700 may be disposed or configured at the vibration device 300. For example, the pad member 700 may be configured to prevent the resonant frequency of the vibration device 300 or reduce the reduction of the sound pressure level. The pad member 700 may be configured to maintain the gap space 10s between the vibration device 300 and the back cover 500 or the distance between the vibration device 300 and the back cover 500. Therefore, since the device 10 according to the embodiment of the present disclosure includes the pad member 700, the sound quality can be improved, and since the air gap or distance between the vibration member 100 and the back cover 500 is maintained, the temperature rise caused by the driving of the vibration device 300 can be prevented.

[0251] The pad member 700 may be located at a gap space 10s between the vibration device 300 and the back cover 500. For example, the pad member 700 may be located at a gap space 10s between the vibration device 300 and the first back cover 510 of the back cover 500. For example, the pad member 700 may be located between the vibration device 300 and the hole portion 550 of the back cover 500.

[0252] The pad member 700 according to an embodiment of the present disclosure may be connected (or attached) to the rear surface of the vibration device 300 to be spaced apart from the back cover 500. For example, the first surface of the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300, and the second surface of the pad member 700 opposite to the first surface may be spaced apart from the first back cover 510 of the back cover 500. For example, the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300 to be spaced apart from the hole portion 550 of the back cover 500. For example, the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300 to be spaced apart from the hole portion 550 of the back cover 500. For example, the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300 to overlap with some of the plurality of first holes 551h arranged at the hole portion 550 of the back cover 500. For example, the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300 to face or directly face the hole portion 550 of the back cover 500, wherein the pad member 700 and the hole portion 550 have a separation space SD therebetween.

[0253] The pad member 700 according to an embodiment of the present disclosure may have a smaller size than the vibration device 300. For example, the size of the pad member 700 may be 14% to 20% of the size of the vibration device 300, but the embodiment of the present disclosure is not limited thereto. For example, the pad member 700 may have a columnar shape. For example, the pad member 700 may have a polygonal columnar shape or a circular columnar shape. For example, the pad member 700 may have a square columnar shape. However, the shape of the pad member 700 is not limited thereto.

[0254] The pad member 700 according to the embodiment of the present disclosure can be used as a mass block for increasing the mass (or weight) of the vibration device 300. The pad member 700 can increase the mass (or weight) of the vibration member 100 in the area overlapping with the vibration device 300, and thus the lowest resonance frequency (or lowest natural frequency) of the vibration member 100 can be reduced. Therefore, due to the lowest resonance frequency (or lowest natural frequency) based on the mass increase caused by the pad member 700, the vibration device 300 can vibrate at a relatively low frequency. Therefore, the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the vibration device 300 can be enhanced. For example, the pad member 700 can be a resonance pad, a resonance control pad, an external resonance pad, a gap pad, a resonance control portion, a resonance control member, a resonance balance pad, a vibration control pad, a vibration balance pad, a local mass block, a point mass block, a mass member, a counterweight plate or a mass member, but the embodiments of the present disclosure are not limited thereto.

[0255] The pad member 700 according to an embodiment of the present disclosure may be configured to correct the mode shape of each of the primary vibration mode and the secondary vibration mode of the vibration member 100 based on the vibration of the vibration device 300. The pad member 700 may be configured to accelerate the main peak vibration mode of the vibration member 100. For example, the pad member 700 may move the main peak of the sound (or sound pressure level) generated based on the vibration of the vibration member 100 to the low-pitched vocal range, and thus may increase or enhance the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal range, and may extend the low-pitched vocal range of the sound generated based on the vibration of the vibration member 100.

[0256] The pad member 700 according to an embodiment of the present disclosure may be configured as a material that absorbs or adjusts the vibration of the vibration device 300. The pad member 700 may be configured as an elastic material having a stiffness less than the bending stiffness of the vibration device 300, but the embodiments of the present disclosure are not limited thereto, and the pad member 700 may also be configured as a weight material having a weight. For example, the pad member 700 may include a vibration absorbing layer, but the embodiments of the present disclosure are not limited thereto. For example, the pad member 700 may include one or more of a silicone-based polymer, paraffin wax, and an acrylic-based polymer, but the embodiments of the present disclosure are not limited thereto. For example, the pad member 700 may be configured as a single-sided tape, a single-sided foam tape, a single-sided buffer tape, a single-sided sponge tape, a single-sided adhesive pad, a single-sided adhesive foam tape, or a single-sided adhesive buffer pad, etc., but the embodiments of the present disclosure are not limited thereto. For example, the pad member 700 may be configured as a material different from the partition member 600, but the embodiments of the present disclosure are not limited thereto.

[0257] The vibration device 300 may include a first area (or a first half area) LA1 and a second area (or a second half area) LA2. For example, the vibration device 300 may include a first area LA1 and a second area LA2 relative to the long side length direction (e.g., the second direction Y). For example, in the vibration device 300, the boundary portion BP between the first area LA1 and the second area LA2 may be the middle of the long side length of the vibration device 300. For example, compared with the first area LA1, the second area LA2 of the vibration device 300 may be adjacent to the cable hole 511 configured at the back cover 500.

[0258] The pad member 700 may be disposed (or attached) at each of the first area LA1 and the second area LA2 of the vibration device 300. The pad member 700 according to an embodiment of the present disclosure may include a first pad member 710 and a second pad member 720.

[0259] The first pad member 710 may be disposed (or attached) at the first area LA1 of the vibration device 300. For example, the first pad member 710 may be disposed (or attached) at the central portion of the first area LA1 of the vibration device 300. For example, the central portion of the first pad member 710 may be disposed (or attached) at the central portion of the first area LA1 of the vibration device 300 or aligned with the central portion of the first area LA1 of the vibration device 300. For example, the first pad member 710 may have a size smaller than the first area LA1 of the vibration device 300. For example, the size of the first pad member 710 may be 7% to 10% of the size of the first area LA1 of the vibration device 300, but embodiments of the present disclosure are not limited thereto.

[0260] The second pad member 720 may be disposed (or attached) at the second area LA2 of the vibration device 300. For example, the second pad member 720 may be disposed (or attached) at the central portion of the second area LA2 of the vibration device 300. For example, the central portion of the second pad member 720 may be disposed (or attached) at the central portion of the second area LA2 of the vibration device 300 or aligned with the central portion of the second area LA2 of the vibration device 300. For example, the second pad member 720 may have a size smaller than the second area LA2 of the vibration device 300. For example, the size of the second pad member 720 may be 7% to 10% of the size of the second area LA2 of the vibration device 300, but embodiments of the present disclosure are not limited thereto.

[0261] According to an embodiment of the present disclosure, the vibration device 300 may include a first vibration device 300 - 1 and a second vibration device 300 - 2 .

[0262] The first vibration device 300-1 may be disposed at the first area A1 of the vibration member 100, and the second vibration device 300-2 may be disposed at the second area A2 of the vibration member 100. The pad member 700 may be disposed (or attached) at the first vibration device 300-1 disposed at the first area A1 of the vibration member 100, and may be disposed (or attached) at the second vibration device 300-2 disposed at the second area A2 of the vibration member 100.

[0263] Each of the first vibration device 300 - 1 and the second vibration device 300 - 2 may include a first area LA1 and a second area LA2 .

[0264] The pad member 700 may include a first pad member 710 disposed (or attached) at a first area LA1 of each of the first vibration device 300-1 and the second vibration device 300-2 and a second pad member 720 disposed (or attached) at a second area LA2 of each of the first vibration device 300-1 and the second vibration device 300-2. The first pad member 710 may be disposed (or attached) at a central portion of the first area LA1 of the first vibration device 300-1 and a central portion of the first area LA1 of the second vibration device 300-2, respectively. The second pad member 720 may be disposed (or attached) at a central portion of the first area LA1 of the first vibration device 300-1 and a central portion of the second area LA2 of the second vibration device 300-2, respectively.

[0265] The pad member 700 according to an embodiment of the present disclosure may be configured to correct the mode shape of each of the primary vibration mode and the secondary vibration mode of the vibration member 100 based on the vibration of the vibration device 300. The pad member 700 may be configured to accelerate the primary peak vibration mode of the vibration member 100. For example, the pad member 700 may move the primary peak of the sound (or sound pressure level) generated based on the vibration of the vibration member 100 to the low-pitched vocal range, and thus may increase or enhance the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal range, and may extend the low-pitched vocal range of the sound generated based on the vibration of the vibration member 100.

[0266] The device 10 according to an embodiment of the present disclosure may further include a pad member 700, and thus the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords may be increased or enhanced, and the low-pitched vocal cords of the sound generated based on the vibration of the vibration member 100 may be extended, the sound quality may be improved, and since the air gap between the vibration member 100 and the back cover 500 is maintained, the temperature increase caused by the driving of the vibration device 300 may be prevented, thereby minimizing or preventing image quality defects of the display panel 110 caused by a rapid temperature difference in a portion of the display panel 110.

[0267] Fig.11 is along Fig. 9 Another cross-sectional view taken along line II-II' is shown. Fig.11 By changing the above reference Fig. 9 and Fig.10 Therefore, in the following description, repeated description of the pad member and other elements except the elements related to the pad member is omitted. Fig. 9 and Fig.10 The description can be included in Fig.11 in the description.

[0268] Reference Fig. 9 and Fig.11 , the pad member 700 according to another embodiment of the present disclosure may be configured to contact (or closely adhere to) or be connected (or attached) to the back cover 500 .

[0269] The pad member 700 may be connected (or attached) to the rear surface of the vibration device 300, and may be connected (or attached) to the first rear cover 510 of the rear cover 500. For example, a first surface of the pad member 700 may be connected (or attached) to the rear surface of the vibration device 300, and a second surface of the pad member 700 may contact (or closely adhere to) the first rear cover 510 of the rear cover 500 or may be connected (or attached) to the first rear cover 510 of the rear cover 500.

[0270] The pad member 700 according to another embodiment of the present disclosure may be configured to cover a portion of the hole portion 550 configured at the back cover 500. For example, the pad member 700 may be configured to cover a portion of the plurality of first holes 551h configured at the first hole portion 551 of the hole portion 550.

[0271] The first pad member 710 of the pad member 700 may be connected (or attached) to each of the central portion of the first area LA1 of the first vibration device 300-1 and the central portion of the first area LA1 of the second vibration device 300-2, and may be connected (or attached) to the first back cover 510 of the back cover 500. The first pad member 710 may be configured to cover a portion of the plurality of first holes 551h configured at the first hole portion 551.

[0272] The second pad member 720 of the pad member 700 may be connected (or attached) to each of the central portion of the second area LA2 of the first vibration device 300-1 and the central portion of the second area LA2 of the second vibration device 300-2, and may be connected (or attached) to the first back cover 510 of the back cover 500. The second pad member 720 may be configured to cover a portion of the plurality of first holes 551h configured at the first hole portion 551.

[0273] The pad member 700 according to another embodiment of the present disclosure can be connected between the rear surface of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) and the first back cover 510 of the back cover 500, and thus can prevent (or limit) or restrict the vibration (or displacement) of a portion of the vibration device 300 (e.g., the central portion of each of the first area LA1 and the second area LA2), thereby reducing the deterioration or decline of the sound quality, and preventing the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) from resonating or reducing the reduction of the sound pressure level. In addition, the pad member 700 can completely maintain the gap space 10s or distance between the vibration device 300 and the back cover 500, and thus can prevent the temperature increase caused by the driving of the vibration device 300, thereby minimizing or preventing the image quality defects of the display panel 110 caused by heat.

[0274] Fig.12 A rear surface of a vibration member and a vibration device according to another embodiment of the present disclosure is shown. Fig.13 A first rear cover and a first hole portion of the hole portion according to another embodiment of the present disclosure are shown. Fig.12 and Fig.13 By changing the above reference Figures 2 to 10 Therefore, in the following description, repeated descriptions of other elements except the arrangement structure of the vibration device and its related elements are omitted. Figures 2 to 10 The description can be included in Fig.12 and Fig.13 in the description.

[0275] Reference Fig.12 , the vibration device 300 according to an embodiment of the present disclosure may include a rectangular shape having a long side LS and a short side SS.

[0276] In addition to the arrangement structure or arrangement direction of the vibration device 300, the vibration device 300 according to another embodiment of the present disclosure can be the same as that described above with reference to FIG. Figures 2 to 10 The described vibration devices 300 are the same or substantially the same, and thus a repeated description thereof is omitted.

[0277] The long side LS of the vibration device 300 may be parallel to the long side of the vibration member 100, and the short side SS of the vibration device 300 may be parallel to the short side of the vibration member 100. For example, the long side length direction of the vibration device 300 may be parallel to the first direction X or the long side length direction (or horizontal direction) of the vibration member 100. For example, the vibration device 300 may have a horizontal arrangement structure. Therefore, in the vibration member 100 having a rectangular shape, the horizontal vibration area of ​​the vibration device 300 may be increased by the horizontal arrangement structure of the vibration device 300, and thus the displacement amount or amplitude displacement of the vibration member 100 may be increased, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the vibration member 100.

[0278] The first vibration device 300-1 of the vibration device 300 may be disposed (or attached) at the first area A1 of the vibration member 100 to have a horizontal arrangement structure. Therefore, in the first area A1 of the vibration member 100, the horizontal vibration area of ​​the first vibration device 300-1 may be increased by the horizontal arrangement structure of the vibration device 300, and thus the displacement amount or amplitude displacement of the first area A1 of the vibration member 100 may be increased, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the first area A1 of the vibration member 100.

[0279] The second vibration device 300-2 of the vibration device 300 may be disposed (or attached) at the second area A2 of the vibration member 100 to have a horizontal arrangement structure. Therefore, in the second area A2 of the vibration member 100, the horizontal vibration area of ​​the second vibration device 300-2 may be increased by the horizontal arrangement structure of the vibration device 300, and thus the displacement amount or amplitude displacement of the second area A2 of the vibration member 100 may be increased, thereby enhancing the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords generated based on the vibration of the second area A2 of the vibration member 100.

[0280] In the device 10 according to another embodiment of the present disclosure, the plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be adjacent to the vibration device 300. For example, the plate 180 may be disposed adjacent to the vibration device 300 in an area between the vibration device 300 and the central portion of the vibration member 100. For example, the plate 180 may be disposed adjacent to the vibration device 300 in an area between the vibration device 300 and the partition member 600.

[0281] The plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to be adjacent to each of the first vibration device 300-1 and the second vibration device 300-2. For example, the plate 180 may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the cable hole 511 adjacent to the first vibration device 300-1, and may be disposed (or attached) at the rear surface of the vibration member 100 to overlap with the cable hole 511 adjacent to the second vibration device 300-2.

[0282] According to another embodiment of the present disclosure, the device 10 may have the same Figures 1 to 8 The device 10 described above has the same effect, and can enhance the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords based on the horizontal arrangement structure of the vibration device 300.

[0283] Fig.14 A rear surface of a vibration member and a vibration device according to another embodiment of the present disclosure is shown. Fig.14 As shown in the above reference Fig.12 and Fig.13 The device described above is additionally provided with a pad component. Therefore, in the following description, repeated descriptions of other elements except the pad component and its related elements are omitted. Fig.12 and Fig.13 The description can be included in Fig.14 in the description.

[0284] Reference Fig.14 , the device 10 according to another embodiment of the present disclosure may further include a pad member 700 .

[0285] The pad member 700 may be located at a gap space 10s between the vibration device 300 and the back cover 500. For example, the pad member 700 may be located at a gap space 10s between the vibration device 300 and the first back cover 510 of the back cover 500. For example, the pad member 700 may be located between the vibration device 300 and the hole portion 550 of the back cover 500. The vibration device 300 may include a first area LA1 and a second area LA2 relative to the long side length direction (e.g., the second direction Y). The pad member 700 may be disposed (or attached) at each of the first area LA1 and the second area LA2 of the vibration device 300. The pad member 700 may include a first pad member 710 disposed (or attached) at the first area LA1 of the vibration device 300 and a second pad member 720 disposed (or attached) at the second area LA2 of the vibration device 300. In addition to the pad member 700 being disposed (or attached) at the vibration device 300 disposed in a horizontal arrangement structure, the pad member 700 may be the same as described above with reference to Fig. 9The described pad members 700 are the same or substantially the same, and thus repeated descriptions thereof are omitted.

[0286] In the device 10 according to another embodiment of the present disclosure, the cushion member 700 (or the first cushion member 710 and the second cushion member 720) may be as follows: Fig.10 5 and 500, or may be spaced apart from the first rear cover 510 (or rear cover 500) as shown in FIG. Fig.11 It is shown contacting (or directly contacting) the first back cover 510 (or back cover 500).

[0287] According to another embodiment of the present disclosure, the device 10 may have the same Figures 9 to 11 The device 10 described above has the same effect, and can enhance the sound characteristics and / or sound pressure level characteristics of the low-pitched vocal cords based on the horizontal arrangement structure of the vibration device 300.

[0288] Fig.15 A vibration device according to an embodiment of the present disclosure is shown. Fig.16 Shows Fig.15 The rear surface of the vibrating device is shown.

[0289] Reference Fig.15 and Fig.16 , the vibration device 300 (or the first vibration device 300 - 1 and the second vibration device 300 - 2 ) according to an embodiment of the present disclosure may include one or more vibration generators.

[0290] The vibration device 300 or one or more vibration generators may include a vibration generating portion 310 including a piezoelectric material.

[0291] The vibration generating unit 310 may be configured to vibrate based on a drive signal (or a sound signal or a voice signal) supplied from a sound circuit board. For example, the vibration generating unit 310 may be a vibration device, a sound device, a vibration generating device, a sound generating device, a vibration membrane, a vibration generating membrane, a vibrator, a vibration generator, a sound generator, an active vibrator, an active vibration generator, a vibration structure, a sound generating structure, an active vibration member, etc., but the embodiments of the present disclosure are not limited thereto.

[0292] The vibration generating portion 310 according to an embodiment of the present disclosure may include a vibration portion 311. The vibration portion 311 may be configured to vibrate by a piezoelectric effect based on a driving signal. The vibration portion 311 may include at least one or more of a piezoelectric inorganic material and a piezoelectric organic material. For example, the vibration portion 311 may be a piezoelectric device, a piezoelectric device portion, a piezoelectric device layer, a piezoelectric structure, a piezoelectric vibration portion, a piezoelectric vibration layer, etc., but the embodiments of the present disclosure are not limited thereto.

[0293] The vibration generating part 310 or one or more vibration generators according to an embodiment of the present disclosure may further include a cover member 313 .

[0294] The cover member 313 may be configured to protect the vibration part 311. For example, the cover member 313 may be configured to surround the vibration part 311. For example, the cover member 313 may be configured to have a size greater than the vibration part 311. For example, the cover member 313 may be a protective member, but embodiments of the present disclosure are not limited thereto.

[0295] According to an embodiment of the present disclosure, the cover member 313 may be configured to cover the first surface (or front surface) of the vibration part 311. For example, the second surface (or rear surface) of the vibration part 311 opposite to the first surface of the vibration part 311 may be an attachment surface (or connection surface or panel attachment surface) attached to (or connected to) the vibration member. For example, the second surface of the vibration part 311 may include an adhesive layer 301. For example, the second surface (or attachment surface) of the vibration part 311 or the adhesive layer 301 may be protected by a release paper (or release film). For example, when the vibration device 300 is connected to the vibration member (or attached to the vibration member), the release paper (or release film) may be peeled off (or removed) from the adhesive layer 301.

[0296] The vibration device 300 according to an embodiment of the present disclosure may further include a signal cable 350 .

[0297] The signal cable 350 may be configured to be electrically connected to the vibration portion 311. A portion 350a of the signal cable 350 may be accommodated (or inserted) between the vibration portion 311 and the cover member 313. Therefore, the signal cable 350 may be integrated into the vibration portion 311 (or configured integrally with the vibration portion 311). For example, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to an embodiment of the present disclosure may be a vibration device in which the signal cable 350 is integrated. For example, the signal cable 350 may be configured as a signal supply member, a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed wiring board, but the embodiments of the present disclosure are not limited thereto.

[0298] Fig.17 is a perspective view showing a vibration device according to another embodiment of the present disclosure. Fig.18 is along Fig.17 A cross-sectional view taken along line III-III' is shown. Fig.19 is along Fig.17 A cross-sectional view taken along line IV-IV' is shown. Figure 17 to Figure 18 The above reference Figures 1 to 16 The vibration device (or the first vibration device and the second vibration device) described.

[0299] Reference Figures 17 to 19 , the vibration device 300 or the first and second vibration devices 300 - 1 and 300 - 2 according to another embodiment of the present disclosure may include one or more vibration generators.

[0300] The one or more vibration generators may include a vibration generating part 310 including a piezoelectric material. The vibration generating part 310 may include a vibration part 311 .

[0301] The vibration generating portion 310 or the vibration portion 311 according to an embodiment of the present disclosure may include a vibration layer 311 a , a first electrode layer 311 b , and a second electrode layer 311 c .

[0302] The vibration layer 311a may include a piezoelectric material or an electroactive material having a piezoelectric effect. For example, the vibration layer 311a may be configured as a ceramic-based material or a piezoelectric ceramic. For example, the vibration layer 311a 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 the embodiments of the present disclosure are not limited thereto.

[0303] The piezoelectric ceramic may be configured as a single crystal ceramic having a crystal structure, or may be configured as a ceramic material or a polycrystalline ceramic having a polycrystalline structure. The piezoelectric material of the single crystal ceramic may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7 or ZnO, but the embodiments of the present disclosure are not limited thereto. The piezoelectric material of the polycrystalline ceramic may include a lead zirconate titanate (PZT)-based material containing lead (Pb), zirconium (Zr) and titanium (Ti), or may include a lead zirconate nickel niobate (PZNN)-based material containing lead (Pb), zirconium (Zr), nickel (Ni) and niobium (Nb), but the embodiments of the present disclosure are not limited thereto. For example, the vibration layer 311a may include at least one or more of calcium titanate (CaTiO3), barium titanate (BaTiO3) and strontium titanate (SrTiO3), but does not contain lead (Pb), but the embodiments of the present disclosure are not limited thereto.

[0304] The first electrode layer 311b may be disposed at a first surface (or upper surface or front surface) 311s1 of the vibration layer 311a. The first electrode layer 311b may have the same size as the vibration layer 311a, or may have a smaller size than the vibration layer 311a.

[0305] The second electrode layer 311c may be disposed at a second surface (or lower surface or rear surface) 311s2 opposite to or different from the first surface 311s1 of the vibration layer 311a. The second electrode layer 311c may have the same size as the vibration layer 311a, or may have a smaller size than the vibration layer 311a. For example, the second electrode layer 311c may have the same shape as that of the vibration layer 311a, but embodiments of the present disclosure are not limited thereto.

[0306] One or more of the first electrode layer 311 b and the second electrode layer 311 c according to an embodiment of the present disclosure may be formed of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material.

[0307] The vibration layer 311a can be polarized (or polarized (poling)) by applying a specific voltage to the first electrode layer 311b and the second electrode layer 311c in a specific temperature atmosphere or a temperature atmosphere that can change from high temperature to room temperature, but the embodiments of the present disclosure are not limited to this. For example, the polarization direction (polarization direction) (or polarization direction) formed in the vibration layer 311a can be formed or aligned (or arranged) from the first electrode layer 311b to the second electrode layer 311c, but the embodiments of the present disclosure are not limited to this, and the polarization direction (or polarization direction) formed in the vibration layer 311a can be formed or aligned (or arranged) from the second electrode layer 311c to the first electrode layer 311b.

[0308] The vibration layer 311a can contract and / or expand to vibrate alternately and repeatedly based on the inverse piezoelectric effect according to the sound signal (or voice signal) applied from the outside to the first electrode layer 311b and the second electrode layer 311c. For example, the vibration layer 311a can vibrate in the vertical direction (or thickness direction) and the planar direction by the signal applied to the first electrode layer 311b and the second electrode layer 311c. The vibration layer 311a can be displaced (or vibrated or driven) by contraction and / or expansion in the planar direction, thereby improving the vibration characteristics of the vibration generating part 310 or the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2), including sound characteristics and / or sound pressure level characteristics.

[0309] The vibration generating part 310 according to an embodiment of the present disclosure may further include a cover member 313. The cover member 313 may be configured to protect at least one or more of the first surface 311s1 and the second surface 311s2 of the vibration part 311. The cover member 313 may be configured to surround at least one or more of the first surface 311s1 and the second surface 311s2 of the vibration part 311.

[0310] The cover member 313 according to an embodiment of the present disclosure may further include a first cover member 313 a .

[0311] The first cover member 313a may be disposed (or configured) at the first surface (or front surface) 311s1 of the vibration part 311. For example, the first cover member 313a may be configured to cover the first electrode layer 311b of the vibration part 311. For example, the first cover member 313a may be configured to have a larger size than the vibration part 311. The first cover member 313a may be configured to protect the first surface 311s1 of the vibration part 311 and the first electrode layer 311b.

[0312] The first cover member 313a may include one or more materials of plastic, fiber, cloth, paper, leather, carbon, and wood, but embodiments of the present disclosure are not limited thereto. For example, the first cover member 313a may be a polyimide film, polyethylene naphthalate, or polyethylene terephthalate film, but embodiments of the present disclosure are not limited thereto.

[0313] The cover member 313 according to an embodiment of the present disclosure may further include a first adhesive layer 313 b .

[0314] The first adhesive layer 313b may be disposed on the first surface (or front surface) 311s1 of the vibration part 311. The first adhesive layer 313b may be configured to cover the first electrode layer 311b of the vibration part 311. The first adhesive layer 313b may be configured to protect the first surface 311s1 of the vibration part 311 and the first electrode layer 311b.

[0315] The first cover member 313a may be connected or coupled to the first surface 311s1 of the vibration portion 311 through the first adhesive layer 313b. For example, the first cover member 313a may be connected or coupled to the first surface 311s1 of the vibration portion 311 or the first electrode layer 311b through the first adhesive layer 313b. For example, the first cover member 313a may be connected or coupled to the first surface 311s1 of the vibration portion 311 or the first electrode layer 311b through a film lamination process using the first adhesive layer 313b. The first adhesive layer 313b may be configured to surround the entire first surface 311s1 of the vibration portion 311 and a portion of the side surface of the vibration portion 311.

[0316] The cover member 313 according to an embodiment of the present disclosure may further include a second adhesive layer 313 c .

[0317] The second adhesive layer 313c may be disposed on the second surface (or rear surface) 311s2 of the vibration part 311. The second adhesive layer 313c may be configured to cover the second electrode layer 311c of the vibration part 311. The second adhesive layer 313c may be configured to cover or protect the second surface 311s2 and the second electrode layer 311c of the vibration part 311. The second adhesive layer 313c may be configured to surround the entire second surface 311s2 of the vibration part 311 and a portion of the side surface of the vibration part 311. For example, the second adhesive layer 313c may be a protective layer or a protective member, but embodiments of the present disclosure are not limited thereto. For example, the cover member 313 may include a first cover member 313a, a first adhesive layer 313b, and a second adhesive layer 313c. For example, the cover member 313 may be a protective member, but embodiments of the present disclosure are not limited thereto.

[0318] Each of the first adhesive layer 313b and the second adhesive layer 313c according to an embodiment of the present disclosure may include an electrically insulating material having adhesiveness and capable of compression and decompression. For example, each of the first adhesive layer 313b and the second adhesive layer 313c may include epoxy resin, acrylic resin, silicone resin, urethane resin, pressure sensitive adhesive (PSA), optically clear adhesive (OCA) or optically clear resin (OCR), but embodiments of the present disclosure are not limited thereto.

[0319] Each of the first adhesive layer 313b and the second adhesive layer 313c according to another embodiment of the present disclosure may include an insulating adhesive material. For example, each of the first adhesive layer 313b and the second adhesive layer 313c may include one or more of a heat-curable adhesive, a photocurable adhesive, and a thermosetting adhesive (or a thermal bonding adhesive). For example, each of the first adhesive layer 313b and the second adhesive layer 313c may include a heat-curable adhesive or a thermosetting adhesive. The thermosetting adhesive may be a heat-activated type or a heat-curable type, but the embodiments of the present disclosure are not limited thereto.

[0320] The first adhesive layer 313b and the second adhesive layer 313c may be configured to surround the vibration portion 311. For example, one or more of the first adhesive layer 313b and the second adhesive layer 313c may be configured to surround the vibration portion 311. For example, the vibration portion 311 may be inserted (or accommodated) or embedded (or built-in) in the interior of the adhesive layer including the first adhesive layer 313b and the second adhesive layer 313c. For example, the first adhesive layer 313b and the second adhesive layer 313c may be an adhesive layer (or a single adhesive layer) configured to surround the vibration portion 311. For example, the first cover member 313a may be coupled to (or attached to) a first surface of an adhesive layer configured to surround the vibration portion 311. For example, the first surface of an adhesive layer may be a first surface of the first adhesive layer 313b.

[0321] The second adhesive layer 313c may be protected by a release paper (or a release film). For example, when the vibration device 300 is connected to (or attached to) a vibration member, the release paper (or release film) may be peeled off (or removed) from the adhesive layer 301.

[0322] like Fig. 20 As shown, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to the embodiment of the present disclosure can be connected to the rear surface of the vibration member 100 or the display panel 110 (or attached to the rear surface) through the second adhesive layer 313c. For example, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to the embodiment of the present disclosure can be directly connected to the rear surface of the vibration member 100 or the display panel 110 (or attached to the rear surface) through the second adhesive layer 313c without the need for Figure 2 and Figure 4 The illustrated connecting member 400. For example, the second adhesive layer 313c connected to (or attached at) the rear surface of the vibration member 100 or the display panel 110 may be a coupling layer or a connecting layer.

[0323] The vibration device 300 (or one or more vibration generators) according to an embodiment of the present disclosure may further include a signal cable 350 .

[0324] The signal cable 350 may be configured to be electrically connected to the vibration generating portion 310. The signal cable 350 may be configured to supply the driving signal supplied from the sound circuit board to the vibration generating portion 310. The signal cable 350 may be configured to be electrically connected to the vibration portion 311 at one side of the vibration generating portion 310. The signal cable 350 may be configured to be electrically connected to the first electrode layer 311b and the second electrode layer 311c of the vibration portion 311. For example, Figure 7 and Figure 8 As shown, the signal cable 350 may be electrically connected to the sound circuit board 360 disposed at the rear surface of the rear cover 500 through a cable hole 511 configured at the rear cover 500 .

[0325] A portion 350a of the signal cable 350 may be accommodated (or inserted) between the vibration portion 311 and the cover member 313. An end portion (or distal portion or one side) 350a of the signal cable 350 may be disposed or inserted (or accommodated) between a peripheral portion of the cover member 313 and a peripheral portion of the vibration portion 311. A peripheral portion of the cover member 313 and a peripheral portion of the vibration portion 311 may accommodate or vertically cover an end portion (or distal portion or one side) 350a of the signal cable 350. Thus, the signal cable 350 may be integrated into the vibration generating portion 310. For example, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to an embodiment of the present disclosure may be a vibration device in which the signal cable 350 is integrated.

[0326] The signal cable 350 according to an embodiment of the present disclosure may include a base member 351 and a plurality of signal lines 353a and 353b. For example, the signal cable 350 may include a base member 351, a first signal line 353a, and a second signal line 353b.

[0327] The base member 351 may include a transparent or opaque plastic material, but embodiments of the present disclosure are not limited thereto.

[0328] The first signal line 353a and the second signal line 353b may be arranged at the first surface of the base member 351 in parallel with the long side length direction of the vibration generating part 310. The first signal line 353a and the second signal line 353b may be spaced apart from each other or electrically separated from each other. The first signal line 353a and the second signal line 353b may be arranged at the first surface of the base member 351 in parallel with each other. For example, the end portions (or distal portions or one side) of the first signal line 353a and the second signal line 353b may be separated from each other and thus may be bent or folded individually.

[0329] The end portion (or distal portion or one side) of the first signal line 353a may be electrically connected to the first electrode layer 311b of the vibration part 311. For example, the end portion of the first signal line 353a may be electrically connected to at least a portion of the first electrode layer 311b of the vibration part 311 at one peripheral portion of the cover member 313. For example, the end portion of the first signal line 353a may be electrically connected to the first electrode layer 311b by a conductive double-sided tape. Therefore, the first signal line 353a may supply the first drive signal supplied from the sound circuit board to the first electrode layer 311b of the vibration part 311.

[0330] The end portion (or distal portion or one side) of the second signal line 353b may be electrically connected to the second electrode layer 311c of the vibration part 311. For example, the end portion of the second signal line 353b may be electrically connected to at least a portion of the second electrode layer 311c of the vibration part 311 at one peripheral portion of the cover member 313. For example, the end portion of the second signal line 353b may be electrically connected to the second electrode layer 311c by a conductive double-sided tape. Therefore, the second signal line 353b may supply the second drive signal supplied from the sound circuit board to the second electrode layer 311c of the vibration part 311.

[0331] The signal cable 350 according to an embodiment of the present disclosure may further include an insulating layer 355 .

[0332] The insulating layer 355 may be provided at the first surface of the base member 351 to cover each of the first signal line 353 a and the second signal line 353 b except for an end portion (or a distal end portion or one side) of the signal cable 350 .

[0333] The end portion (or one side) of the signal cable 350 including the end portion (or one side) of the base member 351 can be inserted (or accommodated) or fixed between the first surface of the vibration part 311 and the cover member 313. Therefore, the end portion (or one side) of the first signal line 353a can be kept electrically connected to the first electrode layer 311b of the vibration part 311, and the end portion (or one side) of the second signal line 353b can be kept electrically connected to the second electrode layer 311c of the vibration part 311. In addition, the end portion (or one side) of the signal cable 350 can be inserted (or accommodated) and fixed between the vibration part 311 and the cover member 313, and thus a contact defect between the vibration generating part 310 and the signal cable 350 caused by the movement of the signal cable 350 can be prevented.

[0334] In the signal cable 350 according to the embodiment of the present disclosure, each of the end portion (or one side) 355a of the base member 351 and the end portion (or one side) 355a of the insulating layer 355 may be removed. For example, the end portion of each of the first signal line 353a and the second signal line 353b may protrude (or extend) from each of the end portion 351e of the base member 351 and the end portion 355e of the insulating layer 355 to have a specific length. Therefore, the end portion (or distal end portion or one side) of each of the first signal line 353a and the second signal line 353b may be bent (or folded) individually or independently.

[0335] An end portion (or one side) of the first signal line 353a that is not supported by an end portion (or one side) of the base member 351 and an end portion 355a of the insulating layer 355 may be directly connected to or directly contact the first electrode layer 311b of the vibration part 311. An end portion (or one side) of the second signal line 353b that is not supported by an end portion (or one side) 355a of the base member 351 and an end portion (or one side) of the insulating layer 355 may be directly connected to or directly contact the second electrode layer 311c of the vibration part 311.

[0336] According to an embodiment of the present disclosure, a portion 350a of the signal cable 350 may be disposed or inserted (or accommodated) between the vibration portion 311 and the cover member 313, and thus the signal cable 350 may be integrated into the vibration generating portion 310 (or integrally configured with the vibration generating portion 310). Therefore, the vibration generating portion 310 and the signal cable 350 may be configured as one portion (or one component), and thus a single materialization effect may be obtained.

[0337] Based on the vibration device 300 according to the embodiment of the present disclosure, the first signal line 353a and the second signal line 353b of the signal cable 350 may be integrated into the vibration generating part 310 (or configured integrally with the vibration generating part 310), and thus a welding process for electrical connection between the vibration generating part 310 and the signal cable 350 may not be required. Therefore, the manufacturing process and structure of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) may be simplified, and thus hazardous processing may be reduced.

[0338] Fig.21 is a perspective view showing a vibration device according to another embodiment of the present disclosure. Fig. 22 is along Fig.21 A cross-sectional view taken along line V-V' is shown. Fig.23 is along Fig.21 A cross-sectional view taken along line VI-VI' is shown. Figure 21 to Figure 23 As shown in the above reference Figures 17 to 20 The device described above is additionally provided with a second cover member. Therefore, in the following description, repeated descriptions of other elements except the second cover member and its related elements are omitted. Figures 17 to 20 The description can be included in Figure 21 to Figure 23 in the description.

[0339] Reference Figure 21 to Figure 23 In the vibration device 300 (or the first vibration device 300 - 1 and the second vibration device 300 - 2 ) according to another embodiment of the present disclosure, the cover member 313 may further include a second cover member 313 d .

[0340] The second cover member 313d may be disposed at the second surface 311s2 of the vibration portion 311. For example, the second cover member 313d may be configured to cover the second electrode layer 311c of the vibration portion 311. For example, the second cover member 313d may be configured to have a larger size than the vibration portion 311 and may be configured to have the same size as the first cover member 313a. The second cover member 313d may be configured to protect the second surface 311s2 and the second electrode layer 311c of the vibration portion 311. The vibration portion 311 may be disposed or inserted (or accommodated) between the first cover member 313a and the second cover member 313d.

[0341] The second cover member 313d may be connected or coupled to the second surface 311s2 of the vibration portion 311 through the second adhesive layer 313c. For example, the second cover member 313d may be connected or coupled to the second surface 311s2 of the vibration portion 311 or the second electrode layer 311c through the second adhesive layer 313c. For example, the second cover member 313d may be connected or coupled to the second surface 311s2 of the vibration portion 311 or the second electrode layer 311c through a film lamination process using the second adhesive layer 313c. The second adhesive layer 313c may be configured to surround the entire second surface 311s2 of the vibration portion 311 and a portion of the side surface of the vibration portion 311.

[0342] The second cover member 313d according to the embodiment of the present disclosure may include one or more materials of plastic, fiber, cloth, paper, leather, carbon and wood, but the embodiment of the present disclosure is not limited thereto. For example, each of the first cover member 313a and the second cover member 313d may include the same material or different materials. For example, each of the first cover member 313a and the second cover member 313d may be any one of a polyimide film, a polyethylene naphthalate film or a polyethylene terephthalate film, but the embodiment of the present disclosure is not limited thereto. For example, the cover member 313 may include a first cover member 313a, a first adhesive layer 313b, a second adhesive layer 313c and a second cover member 313d. For example, the cover member 313 may be a protective member, but the embodiment of the present disclosure is not limited thereto.

[0343] Fig.24 A vibration device according to another embodiment of the present disclosure is shown. Fig.25 yes Fig.24 A rear view of a vibration device according to another embodiment of the present disclosure is shown. Fig.26 is along Fig.24 A cross-sectional view taken along line VII-VII' is shown. Fig. 27 Shown is a reference Figure 24 to Figure 26 The connection structure between the vibration device and the vibration component is described. Fig.28 Shown is a reference Figure 24 to Figure 26 Another connection structure between a vibration device and a vibration component is described.

[0344] Reference Figure 24 to Figure 26 , a vibration device 300 (or a first vibration device 300 - 1 and a second vibration device 300 - 2 ) according to another embodiment of the present disclosure includes a plurality of vibration generators 300A and 300B.

[0345] A plurality of vibration generators 300A and 300B may overlap or stack each other to shift (or drive or vibrate) in the same direction to maximize the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) and / or the amplitude displacement of the vibration member 100. For example, the plurality of vibration generators 300A and 300B may have substantially the same size, but embodiments of the present disclosure are not limited thereto. For example, the plurality of vibration generators 300A and 300B may have substantially the same size within the error range of the manufacturing process, but embodiments of the present disclosure are not limited thereto. Therefore, the plurality of vibration generators 300A and 300B may maximize the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) and / or the amplitude displacement of the vibration member 100.

[0346] According to an embodiment of the present disclosure, when at least one of the plurality of vibration generators 300A and 300B has a different size that deviates from the error range of the manufacturing process, the displacement direction and the amplitude displacement of each of the plurality of vibration generators 300A and 300B may not match each other, and thus the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) may not be maximized. For example, when at least one of the plurality of vibration generators 300A and 300B is displaced in different directions, the displacement directions of the plurality of vibration generators 300A and 300B may not match each other, and thus the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) may not be maximized.

[0347] Each of the plurality of vibration generators 300A and 300B may include a vibration generating portion 310. The vibration generating portion 310 of each of the plurality of vibration generators 300A and 300B may include a vibration portion 311 and a cover member 313. The vibration portion 311 and the cover member 313 may be respectively the same as those described above with reference to Figures 17 to 19 The vibration portion 311 and the cover member 313 described are identical or substantially identical and are denoted by the same reference numerals, and a repeated description thereof is omitted.

[0348] Each of the plurality of vibration generators 300A and 300B may further include a signal cable 350. The signal cable 350 may be the same as that described above with reference to FIG. Figures 17 to 19 The described signal cables 350 are the same or substantially the same and are referred to by the same reference numerals, and a repeated description thereof is omitted.

[0349] Each of the plurality of vibration generators 300A and 300B may be vertically connected (or attached) by an adhesive layer (or second adhesive layer 313 c ) disposed at the cover member 313 .

[0350] A vibration device 300 (or a first vibration device 300 - 1 and a second vibration device 300 - 2 ) according to another embodiment of the present disclosure includes a first vibration generator 300A and a second vibration generator 300B.

[0351] According to an embodiment of the present disclosure, the first vibration generator 300A may be connected to (or attached to) the cover member 313 of the second vibration generator 300B. For example, the first cover member 313a of the second vibration generator 300B may be connected to (or attached to) the adhesive layer (or the second adhesive layer 313c or the attachment surface or the panel attachment surface) of the first vibration generator 300A. For example, the second adhesive layer 313c of the first vibration generator 300A may be protected by a release paper (or a release film). In this case, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to another embodiment of the present disclosure may be connected to (or attached to) the rear surface of the vibration member 100 or the display panel 110 through the adhesive layer (or the second adhesive layer 313c) of the second vibration generator 300B, as Fig. 27 For example, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to another embodiment of the present disclosure can be directly connected to the rear surface of the vibration member 100 or the display panel 110 (or attached to the rear surface) through the second adhesive layer 313c of the second vibration generator 300B without the need for Figure 2 and Figure 4 A connecting member 400 is shown.

[0352] According to another embodiment of the present disclosure, the adhesive layer (or the second adhesive layer 313c) of the first vibration generator 300A may be connected to the adhesive layer (or the second adhesive layer 313c) of the second vibration generator 300B (or attached to the adhesive layer (or the second adhesive layer 313c) of the second vibration generator 300B). For example, the vibration portion 311 of the first vibration generator 300A and the vibration portion 311 of the second vibration generator 300B may be disposed (or configured) between the first cover member 313a of the first vibration generator 300A and the first cover member 313a of the second vibration generator 300B, and may be protected by the first cover member 313a of the first vibration generator 300A and the first cover member 313a of the second vibration generator 300B. In this case, the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to another embodiment of the present disclosure may be connected to the rear surface (or attached to the rear surface) of the vibration member 100 or the display panel 110 through the connecting member 400, such as Fig.28 As shown.

[0353] Fig.29 is a perspective view showing a vibration device according to another embodiment of the present disclosure.

[0354] Reference Fig.29 , a vibration device 300 according to another embodiment of the present disclosure includes a plurality of vibration generators 300A and 300B and an adhesive member 300C.

[0355] A plurality of vibration generators 300A and 300B may overlap or stack each other to shift (or drive or vibrate) in the same direction to maximize the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) and / or the amplitude displacement of the vibration member 100. For example, the plurality of vibration generators 300A and 300B may have substantially the same size, but embodiments of the present disclosure are not limited thereto. For example, the plurality of vibration generators 300A and 300B may have substantially the same size within the error range of the manufacturing process, but embodiments of the present disclosure are not limited thereto. Therefore, the plurality of vibration generators 300A and 300B may maximize the amplitude displacement of the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) and / or the amplitude displacement of the vibration member 100.

[0356] Each of the plurality of vibration generators 300A and 300B may include a vibration generating portion 310. The vibration generating portion 310 of each of the plurality of vibration generators 300A and 300B may include a vibration portion 311 and a cover member 313. The vibration portion 311 and the cover member 313 may be respectively the same as those described above with reference to Figure 21 to Figure 23The vibration portion 311 and the cover member 313 described are identical or substantially identical and are denoted by the same reference numerals, and a repeated description thereof is omitted.

[0357] Each of the plurality of vibration generators 300A and 300B may further include a signal cable 350. The signal cable 350 may be the same as that described above with reference to FIG. Figure 21 to Figure 23 The described signal cables 350 are the same or substantially the same and are referred to by the same reference numerals, and a repeated description thereof is omitted.

[0358] Each of the plurality of vibration generators 300A and 300B may be vertically connected (or attached) by an adhesive member 300C. The adhesive member 300C may be disposed between the plurality of vibration generators 300A and 300B. For example, the adhesive member 300C may be disposed or connected between the cover members 313 of each of the plurality of vibration generators 300A and 300B.

[0359] A vibration device 300 (or a first vibration device 300-1 and a second vibration device 300-2) according to another embodiment of the present disclosure may include two or more vibration generators 300A and 300B, which are stacked to shift in the same direction. In the following description, an example in which the vibration device 300 (or a first vibration device 300-1 and a second vibration device 300-2) includes a first vibration generator 300A and a second vibration generator 300B will be described.

[0360] The adhesive member 300C may be disposed or connected between the first vibration generator 300A and the second vibration generator 300B. For example, the adhesive member 300C may be disposed or connected between the cover member 313 of the first vibration generator 300A and the cover member 313 of the second vibration generator 300B. For example, the adhesive member 300C may be disposed or connected between the second cover member 313d of the first vibration generator 300A and the first cover member 313a of the second vibration generator 300B. For example, the adhesive member 300C may be an intermediate member, an intermediate adhesive member, an insulating member, or an insulating adhesive member, but embodiments of the present disclosure are not limited thereto.

[0361] The adhesive member 300C according to an embodiment of the present disclosure may be configured as a material including an adhesive layer having good attachment or adhesion to each of the plurality of vibration generators 300A and 300B. For example, the adhesive member 300C may include a double-sided tape, a double-sided foam tape, a double-sided foam pad, an adhesive, etc., but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the adhesive member 300C may include epoxy resin, acrylic, silicone, or urethane, but embodiments of the present disclosure are not limited thereto.

[0362] The adhesive layer of the adhesive member 300C according to an embodiment of the present disclosure may include a urethane-based material (or substance) having relative ductility compared to an acrylic-based material. Therefore, the vibration loss within the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) caused by the displacement interference between the plurality of vibration generators 300A and 300B may be minimized, or each of the plurality of vibration generators 300A and 300B may be freely displaced (or vibrated or driven).

[0363] The vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2) according to another embodiment of the present disclosure may be connected to (or attached at) the rear surface of the vibration member 100 or the display panel 110 through the connection member 400, as shown in FIG. Figure 2 , Figure 4 and Figure 5 For example, in the vibration device 300 (or the first vibration device 300-1 and the second vibration device 300-2), the first cover member 313a of the first vibration generator 300A or the second cover member 313d of the second vibration generator 300B may be connected to (or attached to) the rear surface of the vibration member 100 or the display panel 110 through the connecting member 400.

[0364] A vibration device 300 (or a first vibration device 300-1 and a second vibration device 300-2) according to another embodiment of the present disclosure may include a plurality of vibration generators 300A and 300B that are stacked to vibrate (or shift or drive) in the same direction, and thus can maximize or increase the displacement amount and / or amplitude displacement. Therefore, the displacement amount (or bending force) or amplitude displacement of the vibration member 100 can be maximized or increased.

[0365] Fig. 30A The orientation of the sound output from the device (eg, display device) according to the experimental example is shown. Fig. 30B The orientation of the sound output from the device (eg, display device) according to the embodiment of the present disclosure is shown.

[0366] The device (e.g., display device) according to the experimental example can output sound according to the vibration of the vibration member 100 (e.g., display panel 110) based on the vibration of the actuator 3 including the coil and the magnet connected to the rear surface of the vibration member 100 (e.g., display panel 110). The device (e.g., display device) according to the embodiment of the present disclosure can output sound according to the vibration of the vibration member 100 (e.g., display panel 110) based on the vibration of the membrane type vibration device including the piezoelectric material connected to the rear surface of the vibration member 100 (e.g., display panel 110).

[0367] Reference Fig. 30A and Fig. 30B , compared with the device according to the experimental example, it can be seen that the device according to the embodiment of the present disclosure has a wide sound orientation angle. Therefore, the device according to the embodiment of the present disclosure may include a membrane type vibration device including a piezoelectric material, thereby realizing immersive sound.

[0368] Fig.31A Based on the reference from above Fig. 30A Described are the sound pressure level characteristics of beamforming of sound output by a device (eg, a display device) according to an experimental example. Fig.31B Based on the reference from above Fig. 30B The sound pressure level characteristics of beamforming of sound output by a device (eg, a display device) according to an embodiment of the present disclosure are described.

[0369] exist Fig.31A and Fig.31B In each of the , the thick solid line represents the sound pressure level characteristics of a sound with a frequency of 1 kHz, the dotted line represents the sound pressure level characteristics of a sound with a frequency of 5 kHz, the solid line represents the sound pressure level characteristics of a sound with a frequency of 8 kHz, the thin solid line represents the sound pressure level characteristics of a sound with a frequency of 10 kHz, and the thin dotted line represents the sound pressure level characteristics of a sound with a frequency of 12 kHz.

[0370] Reference Fig.31A and Fig.31B , compared with the device according to the experimental example, it can be seen that the device according to the embodiment of the present disclosure has a wide sound orientation angle and a relatively high sound pressure level with respect to each of the frequencies of 1 kHz, 5 kHz, 8 kHz, 10 kHz and 12 kHz.

[0371] Fig.32A The above reference Fig. 30A Sound output characteristics of a device (eg, a display device) according to an experimental example are described. Fig.32B The above reference Fig. 30B The sound output characteristics of a device (eg, a display device) according to an embodiment of the present disclosure are described. Fig.32A and Fig.32B , the horizontal axis represents frequency (Hertz (Hz)), and the vertical axis represents sound pressure level (SPL) (decibel (dB)).

[0372] Reference Fig.32A and Fig.32B , compared with the device according to the experimental example, it can be seen that the device according to the embodiment of the present disclosure has a high sound pressure level in the high-pitched vocal band of 10kHz to 40kHz, and the difference between the highest sound pressure level and the lowest sound pressure level is small. Therefore, the device according to the embodiment of the present disclosure can reproduce high sound close to the high-resolution (Hi-Res) standard of the high-frequency range. For example, the Hi-Res standard may be a sound pressure level of 40kHz or lower.

[0373] Fig.33 The sound output characteristics of the device (eg, display device) according to the first experimental example and the second experimental example are shown. The device according to the first experimental example includes: a vibration device having the above reference Fig.29 The stacked structure of the first vibration generator and the second vibration generator described above, and connected to the rear surface of the vibration member (or display panel); and a rear cover, the rear cover does not include a hole portion overlapping with the vibration device. The device according to the second experimental example includes: a vibration device, the vibration device includes the above reference Fig.21 A vibration generator is described and connected to the rear surface of the vibration member (or display panel); a rear cover, the rear cover does not include a hole portion overlapping with the vibration device. Fig.33 In , the dotted line represents the sound output characteristics of the device according to the first experimental example, and the solid line represents the sound output characteristics of the device according to the second experimental example. Fig.33 , the horizontal axis represents frequency (Hertz (Hz)), and the vertical axis represents sound pressure level (SPL) (decibel (dB)).

[0374] Reference Fig.33 , compared with the device according to the first experimental example, it can be seen that the device according to the second experimental example has a low sound pressure level in the tone vocal band of about 120 Hz to 680 Hz.

[0375] Fig.34 The above reference Fig.33 The sound output characteristics of the device (eg, display device) according to the first experimental example and the sound output characteristics of the device (eg, display device) according to the embodiment of the present disclosure are described. Fig.34 In , the dotted line represents the sound output characteristics of the device according to the first experimental example, and the solid line represents the sound output characteristics of the device including a plurality of holes configured in the back cover to have a hole opening ratio of 33% according to an embodiment of the present disclosure. Fig.34, the horizontal axis represents frequency (Hertz (Hz)), and the vertical axis represents sound pressure level (SPL) (decibel (dB)).

[0376] Reference Fig.34 , compared with the device according to the first experimental example, it can be seen that the device according to the embodiment of the present disclosure has a high sound pressure level in the tone vocal band of about 350 Hz or lower and 500 Hz to 900 Hz. Fig.33 Compared with the device according to the second experimental example shown, it can be seen that the device according to the embodiment of the present disclosure has a high sound pressure level in the pitch vocal band of about 600 Hz or lower. Therefore, in the case where a vent hole is configured in the back cover overlapping the vibration device, it can be seen that the sound pressure level characteristics are improved in the low-pitched vocal band (e.g., the pitch vocal band of about 600 Hz or lower).

[0377] Fig.35 The above reference Fig.33 The sound output characteristics of the device (eg, display device) according to the first experimental example and the sound output characteristics of the device (eg, display device) according to another embodiment of the present disclosure are described. Fig.35 In , the dotted line represents the sound output characteristics of the device according to the first experimental example, and the solid line represents the sound output characteristics of the device including a plurality of holes configured in the back cover to have a hole opening ratio of 66% according to an embodiment of the present disclosure. Fig.35 , the horizontal axis represents frequency (Hertz (Hz)), and the vertical axis represents sound pressure level (SPL) (decibel (dB)).

[0378] Reference Fig.35 , compared with the device according to the first experimental example, it can be seen that the device according to another embodiment of the present disclosure has a high sound pressure level in the tone vocal band of about 370 Hz or lower and 500 Hz to 900 Hz. Fig.33 Compared with the device according to the second experimental example shown in FIG. 1 , it can be seen that the device according to another embodiment of the present disclosure has a high sound pressure level in the pitch vocal band of about 900 Hz or lower. Fig.34 Compared with the device according to the embodiment of the present disclosure shown, it can be seen that the device according to another embodiment of the present disclosure has a high sound pressure level in the pitch vocal band of about 950 Hz or lower.

[0379] Therefore, in the case where the vent hole is provided in the rear cover overlapping with the vibration device, it can be seen that the sound pressure level characteristics are improved in the low-pitched vocal band (for example, the pitch vocal band of about 900 Hz or lower).

[0380] from Figure 33 to Figure 35It can be seen that, compared with the device without vent holes according to each of the first experimental example and the second experimental example, the sound pressure level of the sound output from the device according to one or more embodiments of the present disclosure can be increased as the hole opening rate of the vent holes configured in the back cover increases, and the sound characteristics and / or sound pressure level characteristics of the mid-low pitch vocal cords can be enhanced. For example, in the device according to one or more embodiments of the present disclosure, the plurality of holes configured in the back cover can be configured to have a hole opening rate of 33%.

[0381] Fig.36 The current consumption of the device according to the experimental example and the current consumption (mA) of the device according to the embodiment of the present disclosure are shown. Fig.36 In FIG. 1 , G1 represents the current consumption of the device according to the experimental example, and G2 represents the current consumption of the device according to the embodiment of the present disclosure. Fig. 30A Current consumption of described device. In the device according to the experimental example and the device according to the embodiment of the present disclosure, current consumption when sound having the same sound pressure level was output was measured.

[0382] Reference Fig.36 , the current consumption of the device according to the experimental example was measured to be 90mA, and the current consumption of the device according to the embodiment of the present disclosure was measured to be 51.3mA. Therefore, the device according to the embodiment of the present disclosure may include a membrane-type vibration device, and therefore may have a current consumption that is smaller than the current consumption of the device according to the experimental example configured with an actuator including a magnet and a coil. Therefore, when outputting sound with the same sound pressure level, it can be seen that the device according to the embodiment of the present disclosure reduces the current consumption by about half compared to the device according to the experimental example.

[0383] Fig.37A The front surface temperature of the vibration member when the sound is output in the device according to the experimental example is shown. Fig.37B The front temperature of the vibration member when the sound is output in the device according to the embodiment of the present disclosure is shown. In the temperature measurement, the actuator 3 of the device according to the experimental example and the vibration device 300 of the device according to the embodiment of the present disclosure have been equally driven at 4W (watt).

[0384] Reference Fig.37A In the device according to the experimental example, the temperature in the region of the vibration member 100 (or the display panel 110) overlapping the actuator 3 including the magnet and the coil is output as 35.3° C. when the actuator 3 is turned off and as 37.5° C. when the actuator 3 is turned on. Therefore, in the device according to the experimental example, it is measured that the temperature rises by about 2.2° C. when the sound is output.

[0385] Reference Fig.37B , in the device according to the embodiment of the present disclosure, the temperature in the region of the vibration member 100 (or the display panel 110) overlapping with the membrane type vibration device 300 is output as 38.0° C. when the vibration device 300 is turned off and as 38.6° C. when the vibration device 300 is turned on. Therefore, in the device according to the embodiment of the present disclosure, it is measured that the temperature rises by about 0.6° C. when the sound is output.

[0386] Therefore, when outputting a sound having the same sound pressure level, the temperature rise rate of the vibration member 100 (or the display panel 110) of the device according to the embodiment of the present disclosure can be lower than that of the device according to the experimental example, and thus can have the effect of improving the temperature. In addition, since the air gap between the vibration member 100 (or the display panel 110) and the back cover is maintained, the device according to the embodiment of the present disclosure can prevent the temperature rise caused by the driving of the vibration device 300 (or the display panel 110), thereby minimizing or preventing the image quality degradation caused by the temperature rise.

[0387] The apparatus according to the embodiment of the present disclosure can also be described as follows.

[0388] The device according to one or more embodiments of the present disclosure may include: a vibration member; a vibration device connected to the rear surface of the vibration member; and a rear cover covering the rear surface of the vibration device. The rear cover may include a hole portion including a plurality of holes overlapping the vibration device. The size of the hole portion may be larger than the size of the vibration device.

[0389] According to one or more embodiments of the present disclosure, the vibration member may generate sound based on vibration of the vibration device. The sound may be output in a forward direction of the vibration member and may be output in a rearward direction of the rear cover through the hole portion.

[0390] According to one or more embodiments of the present disclosure, the device may further include a gap space disposed between the vibration member and the rear cover. The gap space may be connected to the rear space of the rear cover through a hole portion.

[0391] According to one or more embodiments of the present disclosure, the device may further include a connection member configured between the vibration member and the rear cover to provide a gap space.

[0392] According to one or more embodiments of the present disclosure, the connection member may include one or more protrusions. The one or more protrusions may protrude from a side surface of the connection member to the gap space.

[0393] According to one or more embodiments of the present disclosure, the back cover may include: a first back cover covering a rear surface of the vibration device; and a second back cover covering a rear surface of the first back cover. The hole portion may be configured at the first back cover and the second back cover.

[0394] According to one or more embodiments of the present disclosure, the hole portion may include: a first hole portion including a plurality of first holes configured at a first rear cover; and a second hole portion including a plurality of second holes configured at a second rear cover to overlap with the first hole portion.

[0395] According to one or more embodiments of the present disclosure, some of the plurality of first holes may overlap with the vibration device, and other ones of the plurality of first holes may overlap with the vibration member at the periphery of the vibration device.

[0396] According to one or more embodiments of the present disclosure, the device may further include a gap space disposed between the vibration member and the rear cover. The gap space may be connected to the rear space of the rear cover through the first hole portion and the second hole portion.

[0397] According to one or more embodiments of the present disclosure, the back cover may further include a connection frame configured to provide an air gap between the first back cover and the second back cover. The air gap may be between the first hole portion and the second hole portion.

[0398] According to one or more embodiments of the present disclosure, the device may further include a sound circuit board, which is arranged at the rear surface of the second rear cover and is electrically connected to the vibration device through a signal cable. The second rear cover may include: a flat portion, which is parallel to the first rear cover; and a rigid portion, which protrudes from the flat portion. The sound circuit board may be arranged at the rigid portion spaced apart from the first rear cover, wherein there is an air gap between the rigid portion and the first rear cover.

[0399] According to one or more embodiments of the present disclosure, the device may further include a pad member disposed between a rear surface of the vibration device and the hole portion of the rear cover.

[0400] According to one or more embodiments of the present disclosure, the pad member may overlap some of the plurality of holes and may be spaced apart from or contact the rear cover.

[0401] According to one or more embodiments of the present disclosure, the vibration device may include a first region and a second region. The pad member may include: a first pad member at the first region of the vibration device; and a second pad member at the second region of the vibration device.

[0402] According to one or more embodiments of the present disclosure, the first pad member may have a size smaller than a size of the first region of the vibration device, and may be disposed at a central portion of the first region of the vibration device.

[0403] According to one or more embodiments of the present disclosure, the pad member may include an elastic material having a stiffness smaller than a bending stiffness of the vibration device.

[0404] According to one or more embodiments of the present disclosure, the device may further include a plate disposed at the rear surface of the vibration member and adjacent to one side of the vibration device. The back cover may further include a cable hole configured to be adjacent to the hole portion. The plate may overlap with the cable hole and may be spaced apart from the cable hole.

[0405] According to one or more embodiments of the present disclosure, a vibration device may include: a vibration generating part including a piezoelectric material; and a signal cable electrically connected to the vibration generating part.

[0406] According to one or more embodiments of the present disclosure, the device may further include a plate disposed at the rear surface of the vibration member to overlap with the signal cable. The rear cover may further include a cable hole through which the signal cable passes. The plate may overlap with the cable hole and may be spaced apart from the cable hole.

[0407] According to one or more embodiments of the present disclosure, a vibration generating portion may include: a vibration portion including a piezoelectric material; and a cover member configured to cover the vibration portion.

[0408] According to one or more embodiments of the present disclosure, a portion of the signal cable may be accommodated between the vibration part and the cover member.

[0409] According to one or more embodiments of the present disclosure, the cover member may include: a first cover member disposed at a first surface of the vibration part; a first adhesive layer between the first surface of the vibration part and the first cover member; and a second adhesive layer configured to cover a second surface of the vibration part opposite to the first surface of the vibration part. The vibration device may be configured to be connected to the rear surface of the vibration member through the second adhesive layer.

[0410] According to one or more embodiments of the present disclosure, the device may further include a connecting member between the vibration member and the vibration device. The cover member may include: a first cover member, the first cover member is arranged at the first surface of the vibration member; a first adhesive layer, the first adhesive layer is between the first surface of the vibration part and the first cover member; a second cover member, the second cover member is arranged at the second surface of the vibration part opposite to the first surface of the vibration part; and a second adhesive layer, the second adhesive layer is between the second surface of the vibration part and the second cover member. The connecting member may be configured to be connected to the first cover member or the second cover member.

[0411] According to one or more embodiments of the present disclosure, a vibration device may include: a plurality of vibration generators; and an adhesive member between the plurality of vibration generators.

[0412] According to one or more embodiments of the present disclosure, the vibration member may include one or more materials of metal, plastic, fiber, leather, wood, cloth, rubber, carbon, glass and paper, or may include a display panel including pixels configured to display an image.

[0413] The device according to one or more embodiments of the present disclosure may be applied to or included in a sound device. The device according to one or more embodiments of the present disclosure may be applied to or included in the following devices: mobile devices, video phones, smart watches, watch phones, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, bending devices, sliding devices, variable devices, electronic notepads, e-books, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop personal computers (PCs), laptop PCs, netbook computers, workstations, navigation devices, car navigation devices, car display devices, car devices, theater devices, theater display devices, TVs, wallpaper display devices, signage devices, game consoles, notebook computers, monitors, cameras, video cameras, and household appliances, etc.

[0414] 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 spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure as long as they are within the scope of the claims and their equivalents.

Claims

1. A device having a vibrating member, comprising: the vibration member; a vibration device connected to a rear surface of the vibration member; as well as a rear cover, the rear cover covering the rear surface of the vibration device, wherein the rear cover includes a hole portion, the hole portion includes a plurality of holes overlapping with the vibration device, and The size of the hole portion is larger than the size of the vibration device.

2. The device according to claim 1, in, The vibration member generates sound based on the vibration of the vibration device, The sound is output in a forward direction of the vibration member and is output in a rearward direction of the rear cover through the hole portion.

3. The device according to claim 1, further comprising a gap space provided between the vibration member and the rear cover, The gap space is connected to the rear space of the rear cover through the hole portion. 4 . The device of claim 3 , further comprising a connecting member disposed between the vibration member and the rear cover to provide the gap space.

5. The device according to claim 4, in, The connecting member includes one or more protrusions, and The one or more protrusions protrude from a side surface of the connecting member to the gap space.

6. The device according to claim 1, in, The back cover comprises: a first rear cover covering the rear surface of the vibration device; and a second back cover, the second back cover covering the rear surface of the first back cover, and Wherein, the hole portion is configured at the first rear cover and the second rear cover.

7. The device according to claim 6, wherein: The hole portion comprises: a first hole portion, the first hole portion including a plurality of first holes disposed at the first rear cover; and A second hole portion includes a plurality of second holes arranged at the second rear cover to overlap with the first hole portion.

8. The device according to claim 7, wherein: Some of the plurality of first holes overlap the vibration device, and other ones of the plurality of first holes overlap the vibration member at a periphery of the vibration device.

9. The device according to claim 7, further comprising a gap space provided between the vibration member and the rear cover, in, The gap space is connected to a rear space of the rear cover through the first hole portion and the second hole portion.

10. The device according to claim 7, in, The back cover further includes a connection frame configured to provide an air gap between the first back cover and the second back cover, and The air gap is between the first hole portion and the second hole portion.

11. The device according to claim 10, further comprising a sound circuit board disposed at a rear surface of the second rear cover and electrically connected to the vibration device through a signal cable, in, The second back cover comprises: a flat portion, the flat portion being parallel to the first rear cover; and a rigid portion protruding from the flat portion, and The sound circuit board is disposed at the rigid portion spaced apart from the first rear cover, wherein the air gap is provided between the rigid portion and the first rear cover.

12. The device according to claim 1, wherein: A pad member is also included, and the pad member is arranged between the rear surface of the vibration device and the hole portion of the rear cover.

13. The device according to claim 12, wherein: The pad member overlaps some of the plurality of holes and is spaced apart from or in contact with the rear cover.

14. The device according to claim 12, in, The vibration device includes a first region and a second region, and Wherein, the pad component comprises: a first pad member at the first region of the vibrating device; and A second pad member at the second region of the vibrating device.

15. The device according to claim 14, wherein: The first pad member has a size smaller than a size of the first region of the vibration device, and is disposed at a central portion of the first region of the vibration device.

16. The device according to claim 12, wherein: The pad member includes an elastic material having a stiffness smaller than a bending stiffness of the vibration device.

17. The device according to any one of claims 1 to 16, further comprising a plate disposed at a rear surface of the vibration member and adjacent to one side of the vibration device, in, The rear cover further includes a cable hole configured to be adjacent to the hole portion, and The plate overlaps with the cable hole and is spaced apart from the cable hole.

18. The device according to any one of claims 1 to 16, wherein: The vibration device comprises: a vibration generating portion, the vibration generating portion including a piezoelectric material; and A signal cable is electrically connected to the vibration generating portion.

19. The device according to claim 18, further comprising a plate provided at the rear surface of the vibration member to overlap with the signal cable, in, The back cover also includes a cable hole through which the signal cable passes, and The plate overlaps with the cable hole and is spaced apart from the cable hole.

20. The device according to claim 18, wherein The vibration generating unit comprises: a vibration portion including a piezoelectric material; and A cover member is configured to cover the vibration portion.

21. The device according to claim 20, wherein: A portion of the signal cable is accommodated between the vibration portion and the cover member.

22. The device according to claim 20, wherein: The cover member comprises: a first cover member disposed at a first surface of the vibration portion; a first adhesive layer between the first surface of the vibration portion and the first cover member; and a second adhesive layer configured to cover a second surface of the vibration portion opposite to the first surface of the vibration portion, and Wherein, the vibration device is configured to be connected to the rear surface of the vibration member through the second adhesive layer.

23. The device according to claim 20, further comprising a connecting member between the vibration member and the vibration device, in, The cover member comprises: a first cover member disposed at a first surface of the vibration member; a first adhesive layer between the first surface of the vibration portion and the first cover member; a second cover member provided at a second surface of the vibration portion opposite to the first surface of the vibration portion; and a second adhesive layer between the second surface of the vibration portion and the second cover member, and Wherein, the connecting member is configured to be connected to the first cover member or the second cover member.

24. The device according to any one of claims 1 to 16, wherein: The vibration device comprises: a plurality of vibration generators; and An adhesive member is provided between the plurality of vibration generators.

25. The device according to any one of claims 1 to 16, wherein: The vibration member includes one or more materials of metal, plastic, fiber, leather, wood, cloth, rubber, carbon, glass, and paper, or includes a display panel including pixels configured to display an image.

Images