Sound production equipment

Abstract

A sound generating apparatus may include a vibrating member having a plate shape and a plurality of vibrating devices disposed at a surface of the vibrating member and vibrating based on a driving signal input thereto, each of the plurality of vibrating devices may have a rectangular shape and may be rotationally symmetrically disposed, and the short side of one vibration device in the plurality of vibration devices can be opposite to the long side of the other vibration device.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Japanese Patent Application No. 2023-107556 filed on June 29, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to a sound generating device. Background Art

[0004] A vehicle includes a sound generating device that outputs sound based on an audio signal output from a multimedia device such as a car audio device. For example, the sound generating device applied to the vehicle may include a front speaker and a rear speaker configured as a coil type. Summary of the invention

[0005] The vibration width (or displacement width) of the piezoelectric device used in the piezoelectric speaker is limited, so there is a case where the sound pressure level is insufficient.

[0006] Accordingly, the present disclosure is directed to a sound generating apparatus that substantially obviates one or more problems due to the above limitations and disadvantages.

[0007] More specifically, the inventors of the present disclosure have conducted extensive research and experiments for achieving a sound-generating device with improved sound quality. Based on the extensive research and experiments, the inventors have invented a new sound-generating device with improved sound quality. One or more embodiments of the present disclosure are intended to provide a sound-generating device with improved sound quality.

[0008] Additional features, advantages, and aspects will be set forth in the following description, and will in part become apparent from the description, or may be learned by practicing the inventive concepts provided herein. Other features, advantages, and aspects of the present disclosure may be realized and obtained through structures specifically pointed out in the written description or structures derivable therefrom, claims, and drawings.

[0009] In order to achieve these and other advantages and aspects of the present disclosure, as specifically presented and generally described herein, in one or more aspects, a sound-emitting device may include a vibration member having a plate shape and a plurality of vibration devices arranged at a surface of the vibration member and vibrating based on a drive signal input thereto, each of the plurality of vibration devices may have a rectangular shape and may be rotationally symmetrically arranged, and a short side of one of the plurality of vibration devices may be opposite to a long side of another vibration device.

[0010] In one or more aspects, the sound-generating device includes a vibration member and first to fourth vibration devices, the vibration member having a plate shape, the first to fourth vibration devices being arranged on the surface of the vibration member and vibrating based on a drive signal input thereto. Each of the first to fourth vibration devices has a rectangular shape and is arranged to be rotationally symmetrically arranged at a rotation angle of 90 degrees relative to a symmetry center point. The short side of one vibration device can be close to the long side of an adjacent vibration device.

[0011] According to one or more embodiments of the present disclosure, a sound-emitting device with improved sound quality may be provided.

[0012] According to one or more embodiments of the present disclosure, a sound-generating device that can improve sound characteristics and / or sound pressure level characteristics of sounds in a low frequency band may be provided.

[0013] Other systems, methods, features, and advantages will be or will become apparent to those skilled in the art upon examination of the drawings and detailed description below. 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 claims below. Nothing in this section should be construed as limiting these claims. Further aspects and advantages are discussed below in conjunction with aspects of the present disclosure.

[0014] It is to be understood that both the foregoing general description and the following detailed 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

[0015] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate aspects and embodiments of the disclosure and together with the description serve to explain principles and examples of the disclosure.

[0016] Figure 1 : is a block diagram showing the configuration of a sound emitting device and a host system according to the first embodiment of the present disclosure.

[0017] Figure 2A : is a plan view showing the configuration of the sound generating device according to the first embodiment of the present disclosure.

[0018] Figure 2B is a perspective view showing the configuration of the sound generating device according to the first embodiment of the present disclosure.

[0019] Figure 3A According to the first embodiment of the present disclosure Figure 1 A cross-sectional view taken along line AA' is shown.

[0020] Figure 3B According to the first embodiment of the present disclosure Figure 1 Another cross-sectional view taken along line AA' is shown.

[0021] Figure 4 is a cross-sectional view showing the configuration of the sound generating device according to the first embodiment of the present disclosure in more detail.

[0022] Figure 5 The relationship between the divided areas in the plan view of the sound generating device according to the first embodiment of the present disclosure and the displacement amount of the vibration member is shown.

[0023] Figure 6 is a graph showing sound characteristics of the sound emitting device according to the first embodiment of the present disclosure.

[0024] Figure 7 is a plan view showing the configuration of a sound generating device according to a second embodiment of the present disclosure.

[0025] Figure 8 According to the second embodiment of the present disclosure Figure 7 A cross-sectional view taken along line BB' is shown.

[0026] Fig. 9 is a cross-sectional view showing a configuration of a sound generating device according to a third embodiment of the present disclosure.

[0027] Fig.10 According to the third embodiment of the present disclosure Fig. 9 A cross-sectional view taken along line CC' is shown.

[0028] Fig.11A : is a plan view showing the configuration of a sound generating device according to a fourth embodiment of the present disclosure.

[0029] Fig. 11B is a perspective view showing the configuration of a sound emission device according to a fourth embodiment of the present disclosure.

[0030] Fig. 12A : is a plan view showing the configuration of a sound generating device according to a fifth embodiment of the present disclosure.

[0031] Fig. 12B is a perspective view showing the configuration of a sound emission device according to a fifth embodiment of the present disclosure.

[0032] Fig.13A : is a plan view showing the configuration of a sound emission device according to a sixth embodiment of the present disclosure.

[0033] Fig. 13B : is a perspective view showing the configuration of a sound emission device according to a sixth embodiment of the present disclosure.

[0034] Fig.14A : is a plan view showing the configuration of a sound generating device according to a seventh embodiment of the present disclosure.

[0035] Fig. 14B is a perspective view showing the configuration of a sound emission device according to a seventh embodiment of the present disclosure.

[0036] Fig.15 is a perspective view showing the structure of a vibration device according to an eighth embodiment of the present disclosure.

[0037] Fig.16 According to the eighth embodiment of the present disclosure, Fig.15 A cross-sectional view taken along line DD' is shown.

[0038] Fig.17 is a perspective view showing a vibration layer of a vibration device according to a ninth embodiment of the present disclosure.

[0039] Fig.18 is a perspective view showing a vibration layer of a vibration device according to a tenth embodiment of the present disclosure.

[0040] Fig.19 A display device according to an eleventh embodiment of the present disclosure is shown.

[0041] Throughout the drawings and detailed description, unless otherwise specified, the same reference numerals should be understood to refer to the same elements, features, and structures. The sizes, lengths, and thicknesses of layers, regions, and elements, and their descriptions may be exaggerated for clarity, illustration, and convenience. DETAILED DESCRIPTION

[0042] Reference is now made in detail to aspects of the present disclosure, examples of which may be illustrated in the accompanying drawings. In the description below, when a detailed description of a known method, function, structure, or configuration may unnecessarily obscure aspects of the present disclosure, a 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 are non-limiting examples.

[0043] Except that steps and / or operations must occur in a specific order, the order of steps and / or operations is not limited to the order set forth herein, and can be changed to occur in an order different from the order described herein. In one or more examples, two operations in succession can be performed substantially simultaneously, or the two operations can be performed in a reverse order or a different order depending on the functions or operations involved.

[0044] Unless otherwise stated, similar reference numerals may all indicate similar elements, even if they are shown in different drawings. Unless otherwise stated, the same reference numerals may be used to indicate the same or substantially the same elements throughout the specification and all drawings. In one or more aspects, the same elements (or elements with the same name) in different drawings may have the same or substantially the same functions and characteristics, unless otherwise stated. The names of the various elements used in the description below are selected only for convenience and therefore may be different from the names used in the actual product.

[0045] The advantages and features of the present disclosure and their implementation methods are illustrated by referring to the aspects described in the accompanying drawings. However, the present disclosure may 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 these example aspects are provided so that the present disclosure may be complete and complete, to help those skilled in the art understand the inventive concept without limiting the scope of protection of the present disclosure.

[0046] The shapes, dimensions (e.g., size, length, width, height, thickness, position, radius, diameter, and area), proportions, ratios, angles, quantities, number of components, etc. disclosed herein (including the shapes, dimensions, proportions, ratios, angles, quantities, number of components, etc. shown in the drawings) are merely examples, and thus, the present disclosure is not limited to the details shown. However, it should be noted that the relative dimensions of the components shown in the drawings are part of the present disclosure.

[0047] Where terms such as "including", "having", "comprising", "containing", "consisting of", "made of", "formed of", "composed of", etc. are used for one or more elements (e.g., layers, films, regions, components, segments, members, parts, areas, parts, portions, steps, operations, etc.), one or more other elements may be added unless terms such as "only" are used. The terms used in the present disclosure are only used to describe specific example aspects and are not intended to limit the scope of the present disclosure. Terms in the singular form may include plural forms unless the context clearly indicates otherwise.

[0048] The word "exemplary" is used to mean serving as an example or illustration, unless otherwise stated. An embodiment is an example embodiment. An aspect is an example aspect. In one or more embodiments, "embodiment", "aspect", "example", etc. should not be interpreted as being preferred or more beneficial than other embodiments. An aspect, an example, an example aspect, etc. may refer to one or more aspects, one or more examples, one or more example aspects, etc., unless otherwise stated. In addition, the term "may" includes all meanings of the term "can".

[0049] 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 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, the value is interpreted as including an error range unless otherwise expressly stated.

[0050] When describing a positional relationship, for example, when using "on", "over", "on top", "above", "under", "above", "below", "below", "below", "near", "near", "adjacent", "next to", "near", "on the side of", etc. to describe the positional relationship between two parts (e.g., layers, films, regions, components, segments, etc.), one or more other parts may be located between the two parts, unless more restrictive terms such as "immediately", "directly", or "close to" are used. For example, when a structure is described as being located "on", "above", "top", "above", "under", "above", "below", "near", "near", "on the side", or "near", "adjacent", "close to" another structure, etc., the description should be interpreted as including the situation where the structures are in contact with each other and the situation where one or more additional structures are arranged or inserted between them. In addition, the terms "front", "rear", "back", "left", "right", "top", "bottom", "down", "up", "up", "up", "up", "down", "above", "down", "below", "column", "row", "vertical", "horizontal", etc. refer to an arbitrary reference system.

[0051] Spatially relative terms such as "below," "under," "lower," "on," "above," "upper," and the like may be used to describe the interrelationships between various elements (e.g., layers, films, regions, components, segments, etc.) as shown in the drawings. Spatially relative terms are understood to be terms that include different orientations of elements in use or operation in addition to the orientations shown in the drawings. For example, if the elements shown in the drawings are flipped, elements described as being "below" or "beneath" other elements will be oriented "above" the other elements. Thus, the term "below" is an exemplary term and may include all orientations of "above" and "below." Similarly, the exemplary terms "above" or "on" may include both the orientations of "above" and "below."

[0052] When describing a temporal relationship, for example, when a time sequence is described as "after", "subsequently", "next", "before", "before", "precedes", etc., discontinuities may be included so that one or more other events may occur between them, unless more restrictive terms such as "only", "immediately" or "directly" are used.

[0053] Terms such as "below," "lower," "above," "upper," etc. may be used herein to describe the relationship between elements as shown in the figures. It should be understood that these terms are spatially relative and based on the orientation shown in the figures.

[0054] It should be understood that although the terms "first", "second", etc. can be used in this article to describe various elements (e.g., layers, films, regions, components, sections, members, parts, regions, parts, parts, steps, operations, etc.), these elements should not be limited by these terms, for example, not limited to any particular order, priority or number of elements. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, the first element can represent the second element, and similarly, the second element can represent the first element. In addition, without departing from the scope of the present disclosure, according to the convenience of those skilled in the art, the first element, the second element, etc. can be arbitrarily named. For the sake of 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 may include one or more first elements. Similarly, the second element, etc. may include one or more second elements, etc.

[0055] When describing elements of the present disclosure, terms such as "first", "second", "A", "B", "(a)", "(b)", etc. may be used. These terms are intended to distinguish the corresponding elements from other elements rather than to define the nature, basis, order or number of the elements.

[0056] When an element (for example, a layer, a film, a region, a component, a segment, etc.) is described as being “connected,” “combined,” “attached,” “bonded,” etc. to another element, the one element may not only be directly connected, combined, attached, bonded, etc. to the other element, but may also be indirectly connected, combined, attached, bonded, etc. to the other element with one or more intermediate elements disposed or interposed therebetween, unless otherwise specified.

[0057] When an element (for example, a layer, film, region, component, segment, etc.) is “contacted”, “overlapped”, etc. with another element, 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 the other element with one or more intermediate elements disposed or interposed therebetween, unless otherwise specified.

[0058] Phrases where an element (e.g., a layer, a film, a region, a component, a segment, etc.) is disposed “in,” “on,” or is “connected,” “combined,” etc. to another element may be understood to mean that at least a portion of the element is disposed “in,” “on,” or is “connected,” “combined,” etc. to at least a portion of the other element, or that the entire element is disposed “in,” “on,” or is “connected,” “combined,” etc. to the other element. Phrases where an element (e.g., a layer, a film, a region, a component, a segment, etc.) “contacts,” “overlaps,” etc. with another element may be understood to mean, for example, that at least a portion of the element contacts, overlaps, etc. with at least a portion of the other element, that the entire element contacts, overlaps, etc. with at least a portion of the other element, or that at least a portion of the element contacts, overlaps, etc. with the entire other element.

[0059] Terms such as "line" or "direction" should not be interpreted based solely on the geometric relationship of the lines or directions being parallel or perpendicular to each other. Such terms may refer to a wider range of lines or directions in which the components of the present disclosure can operate functionally. For example, terms such as "first direction", "second direction", etc., which are parallel to or perpendicular to the "x-axis", "y-axis", or "z-axis", should not be interpreted based solely on the geometric relationship of the directions being parallel or perpendicular to each other, and may refer to directions with wider directionality within the range in which the components of the present disclosure can operate functionally.

[0060] The term "at least one" should be understood to include any and all combinations of one or more of the related listed items. For example, each of the phrases "at least one of the first, second, or third item" and "at least one of the first, second, and third items" can represent (i) a combination of items from one or more of the first, second, and third items, or (ii) only one of the first, second, and third items.

[0061] The expression of a first element, a second element, and "and / or" a third element should be understood to include 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. For example, A, B, and / or C include: only A; only B; only C; any one of A, B, and C (e.g., A, B, or C); a partial 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 mean: only A; only B; A or B; or A and B.

[0062] In one or more aspects, the terms "between" and "among" may be used interchangeably for convenience only, unless otherwise specified. For example, the expression "between a plurality of elements" may be understood as among 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 segment, etc.) is referred to as being "between" at least two elements, the one element may be the only element between the at least two elements, or one or more intermediate elements may also be present.

[0063] In one or more aspects, the phrases "each other" and "mutually" may be used interchangeably for convenience only, unless otherwise specified. 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.

[0064] In one or more aspects, the phrases "one or more of" and "one or more of" may be used interchangeably for convenience only, unless otherwise noted.

[0065] The term "or" means an inclusive or, not an exclusive or. For example, unless otherwise specified or clearly understood from the context, the statement "x employs 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".

[0066] The features of various aspects of the present disclosure may be coupled or combined with each other in part or in their entirety, may be technically associated with each other, and may be operated, linked or driven together in various ways. Aspects of the present disclosure may be implemented or executed independently of each other, or may be implemented or executed together under a mutual dependence or correlation relationship. In one or more aspects, the components of each device according to various aspects of the present disclosure may be operably coupled and configured.

[0067] Unless otherwise defined, the terms (including technical and scientific terms) used herein have the same meaning as commonly understood by a person of ordinary skill in the art to which the exemplary aspects belong. It should be further understood that, for example, 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 explicitly defined herein.

[0068] The terms used herein have been selected as common terms in the relevant technical field; however, other terms may be used 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 ideas, but should be understood as examples of terms used to describe exemplary aspects.

[0069] In addition, in certain cases, the terms may be arbitrarily selected by the applicant, and in this case, the detailed meaning is described in this document. Therefore, the terms used in this document should be understood not only based on the term name, but also based on the meaning and content of the term.

[0070] The “x-axis direction”, “y-axis direction”, and “z-axis direction” should not be interpreted only by the geometric relationship of being perpendicular to each other, but may have wider directivities within the range in which the elements of the present disclosure can function.

[0071] In the following description, various exemplary aspects of the present disclosure are described in detail with reference to the accompanying drawings. With respect to the reference numerals of the elements of each of the accompanying drawings, the same elements may be shown in other drawings, and similar reference numerals may indicate similar elements, unless otherwise specified. The same or similar elements may be represented by the same reference numerals even if they are shown in different drawings.

[0072] Furthermore, for ease of description, the proportion, size, size and thickness of each element shown in the drawings may be different from the actual proportion, size, size and thickness, and therefore, aspects of the present disclosure are not limited to the proportion, size, size and thickness shown in the drawings.

[0073] [First embodiment]

[0074] Figure 11 is a block diagram showing the configuration of a sound emitting device 1 according to an embodiment of the present disclosure. Figure 1 Describe the driving signal (or sound signal or voice signal) input to the sound device 1. The sound device 1 can be used alone as a speaker, or can be embedded in a billboard, poster, notice board, transportation, building, display device, etc. The use of the sound device 1 according to the embodiment of the present disclosure is not particularly limited to this.

[0075] In an embodiment of the present disclosure, the sound-generating device 1 may include four vibration devices 11, 12, 13, and 14. The vibration devices 11, 12, 13, and 14 may be devices that are displaced based on the inverse piezoelectric effect when a voltage is applied based on a drive signal input thereto. For example, the vibration devices 11, 12, 13, and 14 may be elements that are bent and displaced based on voltage, such as bimorphs, unimorphs, or multimorphs. The input drive signal may typically be an alternating current (AC) voltage, so the vibration devices 11, 12, 13, and 14 may vibrate based on the input drive signal to generate vibration and / or sound. For example, the vibration devices 11, 12, 13, and 14 may be vibration generating devices, sound generating devices, piezoelectric devices, vibration generators, sound generators, piezoelectric speakers, or speech generating devices.

[0076] The host system 7 may be a system including a device or a plurality of devices that provide a driving signal to control the sound device 1. However, the host system 7 may also provide other signals such as image signals (e.g., RGB data or RGBW data) and timing signals (e.g., vertical synchronization signals, horizontal synchronization signals, and data enable signals, etc.) based on the purpose of use of the sound device 1. For example, the host system 7 may be a source sound reproduction device, a local broadcasting device, a radio broadcast reproduction system, a television (TV) system, a set-top box, a navigation system, an optical disc player, a computer, a home theater system, a video phone system, etc. In addition, the sound device 1 and the host system 7 may be an integrated device or separate devices.

[0077] The host system 7 may include an input unit 701, a digital-to-analog (D / A) converter 711, a pulse width modulation (PWM) circuit 712, transistors 721 and 722, a coil 723, and a capacitor 724. The input unit 701 may input a digital signal to control the vibration devices 11, 12, 13, and 14. The D / A converter 711 may convert a digital signal input from the input unit 701 into an analog signal. The PWM circuit 712 may pulse-width modulate the analog signal input from the D / A converter 711 to output a pulse signal. The transistors 721 and 722 may include a PNP transistor 721 and an NPN transistor 722. The PNP transistor 721 and the NPN transistor 722 may constitute a push-pull circuit. For example, the collector terminals of each of the transistors 721 and 722 may be connected to each other, and the base terminals of each of the transistors 721 and 722 may be connected to each other. A positive voltage +Vdd may be applied to the emitter terminal of transistor 721, and a negative voltage -Vdd may be applied to the emitter terminal of transistor 722. A pulse signal from PWM circuit 712 may be applied to the base terminals of transistors 721 and 722, and transistors 721 and 722 may be turned on or off complementarily based on the pulse signal. For example, when a positive pulse signal is applied to the base terminals of transistors 721 and 722, transistor 721 may be turned on, and transistor 722 may be turned off. Therefore, the voltage of the collector terminal of each of transistors 721 and 722 may be a voltage +Vdd. On the other hand, when a negative pulse signal is applied to the base terminals of transistors 721 and 722, transistor 721 may be turned off, and transistor 722 may be turned on. Therefore, the voltage of the collector terminal of each of transistors 721 and 722 may be a voltage -Vdd. In addition, when the potential of the pulse signal is a ground potential, transistors 721 and 722 may be turned off at the same time. The coil 723 and the capacitor 724 can each be used as a low-pass filter and can smooth the pulse signal at the collector terminal of each of the transistors 721 and 722 to be output as a drive signal (or a voice signal or a sound signal) to the vibration devices 11, 12, 13 and 14.

[0078] Figure 2A is a plan view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Figure 2B is a perspective view showing a configuration of a sound emitting device according to an embodiment of the present disclosure. Figure 2B is a perspective view showing the configuration of the sound generating device according to the first embodiment of the present disclosure. Figure 3A According to the embodiment of the present disclosure Figure 1 A cross-sectional view taken along line AA'. Figure 3B According to the embodiment of the present disclosure Figure 1 Another cross-sectional view taken along the line A-A'. Figure 2A , Figure 2B , Figure 3A and Figure 3B A detailed configuration of the sound emission device 1 according to an embodiment of the present disclosure will be described.

[0079] like Figure 2A and Figure 2B As shown, the sound-generating device 1 may include a plurality of vibration devices 11, 12, 13, and 14 and a vibration member 20. The sound-generating device 1 may include four vibration devices 11, 12, 13, and 14 and a vibration member 20. The vibration devices 11, 12, 13, and 14 may have a rectangular shape one-dimensionally (or when viewed in a plane or plan view). The vibration devices 11, 12, 13, and 14 may have a flat plate shape. Figure 2A , Figure 2B , Figure 3A and Figure 3B , it is shown that the direction of the long axis direction of each of the vibration devices 11 and 13 is the x-axis, the direction of the short axis direction of each of the vibration devices 11 and 13 is the y-axis, and the direction perpendicular to the x-axis and the y-axis is the z-axis. The long axis direction of each of the vibration devices 12 and 14 may be parallel to the y-axis, and the short axis direction of each of the vibration devices 12 and 14 may be parallel to the x-axis.

[0080] The vibration member 20 may be a passive vibration member, a vibration plate or a vibration substrate. The vibration member 20 may be composed of materials such as metal, resin, glass, hard paper, wood, rubber, plastic, fiber, cloth, paper, leather or carbon, but the embodiments of the present disclosure are not limited thereto. For example, examples of metals that may constitute the vibration member 20 may include stainless steel, but the embodiments of the present disclosure are not limited thereto. For example, the vibration member 20 may be composed of a styrene material. In addition, the vibration member 20 may include a display panel having pixels configured to display an image, a screen panel onto which an image is projected from a display device, a lighting panel, a light emitting diode lighting panel, an organic light emitting lighting panel, an inorganic light emitting lighting panel, a sign panel, a vehicle interior material, a vehicle glass window (or car window), a vehicle exterior material, a vehicle seat interior material, a vehicle ceiling material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window or a mirror, but the embodiments of the present disclosure are not limited thereto.

[0081] In addition, if Figure 3AAs shown, the vibration devices 11 and 12 may each include two main surfaces opposite to each other. In the embodiment of the present disclosure, the surface on the negative side (or negative direction side) of the two main surfaces of each of the vibration devices 11 and 12 may be referred to as the first main surface 11a and 12a, and the surface on the positive side (or positive direction side) of the z-axis of each of the two main surfaces of the vibration devices 11 and 12 may be referred to as the second main surface 11b and 12b. This can be compared with the vibration devices 13 and 14 (on the Figure 3A and Figure 3B For example, the surface on the negative side (or negative direction side or backward direction) of the z-axis of the two main surfaces of each of the vibration devices 13 and 14 can be referred to as the first main surface, and the surface on the positive side (or positive direction side) of the z-axis of the two main surfaces of each of the vibration devices 13 and 14 can be referred to as the second main surface.

[0082] Similarly, the vibration member 20 may each include two main surfaces 20a and 20b opposite to each other. In the embodiment of the present disclosure, the surface on the positive side of the z-axis of the two main surfaces of the vibration member 20 may be referred to as the first main surface 21a, and the surface on the negative side of the z-axis of the two main surfaces of the vibration member 20 may be referred to as the second main surface 20b.

[0083] like Figure 2B , Figure 3A and Figure 3B As shown, each of the vibration devices 11, 12, 13, and 14 may be disposed on the first main surface 20a of the vibration member 20. For example, the first main surfaces 20a of the vibration devices 11 and 12 and the first main surfaces of the vibration devices 13 and 14 may contact the vibration member 20. For example, each of the vibration devices 11, 12, 13, and 14 may be connected by the vibration member 20 and the adhesive members 15, 16, 17, and 18.

[0084] According to the embodiments of the present disclosure, Figure 2A and Figure 3AAs shown, each of the vibration devices 11, 12, 13 and 14 can be connected or attached to the vibration member 20 by a whole surface attachment method using adhesive members 15, 16, 17 and 18. For example, the first main surface 11a of the vibration device (or the first vibration device) 11 can be connected or attached to the front surface of the first main surface 20a of the vibration member 20 by the first adhesive member 15. The first main surface 12a of the vibration device (or the second vibration device) 12 can be connected or attached to the front surface of the first main surface 20a of the vibration member 20 by the second adhesive member 16. The first main surface of the vibration device (or the third vibration device) 13 can be connected or attached to the front surface of the first main surface 20a of the vibration member 20 by the third adhesive member 17. The first main surface of the vibration device (or the fourth vibration device) 14 can be connected or attached to the front surface of the first main surface 20a of the vibration member 20 by the fourth adhesive member 18.

[0085] According to another embodiment of the present disclosure, Figure 3B As shown, each of the vibration devices 11, 12, 13, and 14 can be connected or attached to the vibration member 20 by a partial attachment method using adhesive members 15, 16, 17, and 18. For example, a portion of each of the vibration devices 11, 12, 13, and 14 can be connected or attached to the vibration member 20 by a partial attachment method using adhesive members 15, 16, 17, and 18. For example, a portion of the first main surface 11a of the vibration device (or first vibration device) 11 can be connected or attached to a portion of the first main surface 20a of the vibration member 20 by the first adhesive member 15. A portion of the first main surface 12a of the vibration device (or second vibration device) 12 can be connected or attached to a portion of the first main surface 20a of the vibration member 20 by the second adhesive member 16. A portion of the first main surface of the vibration device (or third vibration device) 13 can be connected or attached to a portion of the first main surface 20a of the vibration member 20 by the third adhesive member 17. A portion of the first major surface of the vibration device (or fourth vibration device) 14 may be connected or attached to a portion of the first major surface 20 a of the vibration member 20 through the fourth adhesive member 18 .

[0086] According to another embodiment of the present disclosure, bonding members 15, 16, 17 and 18 may be attached (or inserted) between the vibration member 20 and the edge portion (or peripheral portion) of each of the vibration devices 11, 12, 13 and 14 except the central portion by a partial attachment method. For example, the edge portion of each of the vibration devices 11, 12, 13 and 14 may be connected or attached to the first main surface 20a of the vibration member 20 by bonding members 15, 16, 17 and 18. For example, an air gap 15s may be configured between each of the vibration devices 11 to 14 and the vibration member 20. The air gap 15s may be configured between the central portion of each of the vibration devices 11 to 14 and the vibration member 20. The air gap 15s may enable each of the vibration devices 11 to 14 and the vibration member 20 to vibrate independently without relying on each other. In addition, the air gap 15s can enable smooth vibration of each of the vibration devices 11 to 14 and the free strain (or free displacement or free deformation) of the vibration component 20 based on this, thereby increasing the vibration width of the vibration component 20 and improving the sound pressure level characteristics of the sound generated by the vibration of the vibration component 20.

[0087] According to another embodiment of the present disclosure, each of the adhesive members 15, 16, 17 and 18 may include an elastic material having adhesiveness and capable of compression and decompression. For example, the adhesive members 15, 16, 17 and 18 may include an adhesive material having elasticity or flexibility. For example, the adhesive members 15, 16, 17 and 18 may include an adhesive material having a low elastic modulus (or Young's modulus). For example, the adhesive members 15, 16, 17 and 18 may be composed of an adhesive resin, an adhesive, an adhesive tape, an adhesive pad, etc., but the embodiments of the present disclosure are not limited thereto. For example, the adhesive tape may include a double-sided tape, a double-sided foam tape, a double-sided sponge tape, etc. having an adhesive layer, but the embodiments of the present disclosure are not limited thereto. The adhesive pad may have an adhesive layer and may be an elastic pad such as a silicone pad or a rubber pad capable of compression and decompression.

[0088] The adhesive resin, adhesive or adhesive layer of each of the adhesive members 15, 16, 17 and 18 according to another embodiment of the present disclosure may include an epoxy group, an acrylic group, a silicone group or a urethane group. For example, the adhesive members 15, 16, 17 and 18 may include an acrylic-based material that is relatively better than urethane in terms of adhesive force and hardness, so that the vibration of the vibration devices 11, 12, 13 and 14 can be well transmitted to the vibration member 20, but the embodiments of the present disclosure are not limited thereto.

[0089] According to the embodiment of the present disclosure, the adhesive resin, adhesive or adhesive layer of each of the adhesive members 15, 16, 17 and 18 may be a photocurable adhesive material, but the embodiment of the present disclosure is not limited thereto. For example, the adhesive resin, adhesive or adhesive layer may be an ultraviolet (UV) adhesive, but the embodiment of the present disclosure is not limited thereto.

[0090] The vibration devices 11, 12, 13 and 14 can be connected in parallel to the host system 7 as a common driving circuit. Therefore, when the driving signal (or voice signal or sound signal) is applied to the vibration devices 11, 12, 13 and 14 from the host system 7, the vibration devices 11, 12, 13 and 14 can vibrate synchronously with each other based on the driving signal. The vibration generated from each of the vibration devices 11, 12, 13 and 14 can be directly (or through a bonding member) transmitted to the vibration member 20. For example, the vibration devices 11, 12, 13 and 14 can receive the driving signal (or voice signal or sound signal) from the host system 7 at the same time, and can be driven (or vibrated) synchronously with each other based on the driving signal. For example, the vibration devices 11, 12, 13 and 14 can be configured to be driven (or vibrated) synchronously with each other based on the driving signal, rather than being driven (or vibrated) individually. For example, the driving signal can be applied to the vibration devices 11, 12, 13 and 14 together through a driving line.

[0091] In addition, in the plane, the vibration devices 11, 12, 13 and 14 can be spaced apart from each other by a certain (or predetermined) distance D without overlapping each other. For example, the distance (or spacing distance) D can be 25 mm to 50 mm, but the embodiments of the present disclosure are not limited thereto. For example, the distance (or spacing distance) D can be changed arbitrarily.

[0092] Among the four vibration devices 11, 12, 13 and 14, the short side of one vibration device may be opposite to the long side of another adjacent vibration device. Specifically, the short side S11 of the vibration device 11 may be opposite to the long side L22 of the adjacent vibration device 12. Similarly, the short side S21 of the vibration device 12 may be opposite to the long side L32 of the adjacent vibration device 13. The short side S31 of the vibration device 13 may be opposite to the long side L42 of the adjacent vibration device 14. The short side S41 of the vibration device 14 may be opposite to the long side L12 of the adjacent vibration device 11. For example, the long axis directions of two adjacent vibration devices may intersect with each other. For example, the long axis direction of the first vibration device and the long axis direction of the second vibration device may intersect with each other. For example, the angle between the long axis direction of the first vibration device and the long axis direction of the second vibration device may be 90 degrees.

[0093] In addition, in the plane (xy plane), the vibration devices 11, 12, 13 and 14 can be arranged (or set) to be rotationally symmetrical with respect to a point (hereinafter referred to as the symmetry center point) O of the first main surface 20a of the vibration member 20. Specifically, the four vibration devices 11, 12, 13 and 14 can be arranged rotationally symmetrically at a rotation angle of 90 degrees relative to the symmetry center point O. For example, the vibration device 12 of the two adjacent vibration devices 11 and 12 can have a structure rotated 90 degrees counterclockwise from the vibration device 11 relative to the symmetry center point O of the first main surface 20a of the vibration member 20.

[0094] Reference Figure 4 An embodiment of the structure of the sound generating device 1 is described in more detail. Figure 4 It is shown that Figure 3A An enlarged view of the vibrating devices 11 and 12 at the same position. Figure 4 , the connection relationship of each electrode included in the vibration devices 11 and 12 is schematically shown by a circuit diagram to describe a method for inputting a driving signal to the sound generating device 1. The vibration devices 13 and 14 may be substantially the same structure as the vibration devices 11 and 12, and therefore, a detailed description thereof may be omitted.

[0095] The vibration device 11 may include an electrode (or first electrode) 111, a vibration layer (or piezoelectric layer) 112, and an electrode (or second electrode) 113. The electrode 111 and the electrode 113 may be arranged (or disposed) with the vibration layer 112 being located between the electrode 111 and the electrode 113 in the thickness direction. A voltage V may be applied to the vibration layer 112 through the electrode 111 and the electrode 113. The voltage V may correspond to a drive signal (or a voice signal or a sound signal).

[0096] The vibration device 11 may further include a protection layer (or a first protection member) 117. The protection layer 117 may be configured to protect and / or insulate an upper surface of the electrode 111.

[0097] The vibration device 11 may further include a second protective layer (or second protective member) 118. The second protective layer 118 may be configured to protect and / or insulate the lower surface of the electrode 113. For example, one or more of the protective layer 117 and the second protective layer 118 may be omitted.

[0098] The vibration device 11 may be connected to the first major surface 20a of the vibration member 20 through the adhesive member 15. The adhesive member 15 may be configured to connect the vibration device 11 to the first major surface 20a of the vibration member 20.

[0099] Similarly, the vibration device 12 may include an electrode (or first electrode) 121, a vibration layer (or piezoelectric layer) 122, and an electrode (or second electrode) 123. The electrode 121 and the electrode 123 may be arranged (or provided) with the vibration layer 122 being located between the electrode 121 and the electrode 123 in the thickness direction. A voltage V may be applied to the vibration layer 122 through the electrode 121 and the electrode 123. The voltage V may correspond to a drive signal (or a voice signal or a sound signal).

[0100] The vibration device 12 may further include a protection layer (or a first protection member) 127. The protection layer 127 may be configured to protect and / or insulate an upper surface of the electrode 121.

[0101] The vibration device 12 may further include a second protective layer (or second protective member) 128. The second protective layer 128 may be configured to protect and / or insulate the lower surface of the electrode 123. For example, one or more of the protective layer 127 and the second protective layer 128 may be omitted.

[0102] The vibration device 12 may be connected to the first major surface 20a of the vibration member 20 through the adhesive member 16. The adhesive member 16 may be configured to connect the vibration device 12 to the first major surface 20a of the vibration member 20.

[0103] In the embodiments of the present disclosure, Figure 4 As shown, the polarization direction of the vibration layers 112 and 122 can be the positive direction (or positive direction) or the negative direction (or negative direction) of the z-axis. In addition, the wiring (or wire) configured to apply a voltage to each electrode can be connected to the electrodes 111, 113, 121 and 123 by welding or the like.

[0104] When an AC voltage is applied between the electrode 111 and the electrode 113 of the vibration device 11, the vibration layer 112 can shrink and expand, and periodic stress can be applied to the vibration member 20. Similarly, when an AC voltage is applied between the electrode 121 and the electrode 123 of the vibration device 12, the vibration layer 122 can shrink and expand, and periodic stress can be applied to the vibration member 20. That is, the vibration devices 11 and 12 can transfer periodic stress to the vibration member 20, so that the vibration member 20 can bend and vibrate by the transferred stress. Vibration (e.g., sound) based on a voice signal can be generated by the vibration of the vibration member 20 based on the transferred stress.

[0105] The material of the vibration layers 112 and 222 is not particularly limited thereto, but may include ferroelectric ceramics with good piezoelectric properties such as lead zirconate titanate (PZT) based materials to increase the displacement. As another example, the material used as the material of the vibration layers 112 and 122 may include a piezoelectric material of a ceramic-based material capable of achieving relatively strong vibration. As another example, the vibration layers 112 and 122 may include a piezoelectric ceramic material having a perovskite-based crystal structure. In addition, the vibration layers 112 and 222 may have a polycrystalline structure or a single crystal structure. For example, the vibration layers 112 and 222 may be configured as polycrystalline ceramics or single crystal ceramics. In addition, the vibration layers 112 and 222 may be configured as PVDF (polyvinylidene fluoride) based materials or materials containing piezoelectric materials including lead (Pb), or may be configured as piezoelectric materials that do not include lead (Pb). For example, the piezoelectric material including lead (Pb) may include one or more of lead zirconate titanate (PZT)-based materials, lead zirconate nickel niobate (PZNN)-based materials, lead magnesium niobate (PMN)-based materials, lead nickel niobate (PNN)-based materials, lead zirconate niobate (PZN)-based materials, or lead indium niobate (PIN)-based materials, but the embodiments of the present disclosure are not limited thereto. For example, the piezoelectric material not including lead (Pb) may include one or more of barium titanate (BaTiO3), calcium titanate (CaTiO3), and strontium titanate (SrTiO3), but the embodiments of the present disclosure are not limited thereto.

[0106] The adhesive layers 15 and 16 may be configured as a compressed resin material, adhesive or tape, etc., but the embodiments of the present disclosure are not limited thereto. In addition, the side surface of each vibration device may be covered with an insulator such as resin, etc. to prevent electrical short circuits between the vibration device and other components.

[0107] The material of the first electrode and the second electrode of each of the vibration devices 11 and 12 may include a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, as a transparent or semi-transparent conductive material, the first electrode and the second electrode may include one or more of indium tin oxide (ITO) or indium zinc oxide (IZO). As an opaque conductive material, the first electrode and the second electrode may include one of aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), and magnesium (Mg), or an alloy of the foregoing metals, but the embodiments of the present disclosure are not limited thereto. For example, the protective layer 127 may be a polyimide (PI) film, a polyethylene terephthalate (PET) film, or a polyethylene naphthalate (PEN) film, but the embodiments of the present disclosure are not limited thereto.

[0108] Figure 5 The relationship between the divided areas in the plan view of the sound-emitting device 1 according to an embodiment of the present disclosure and the displacement amount of the vibration member is shown. Here, an embodiment is shown in which the sound-generating area of ​​the sound-emitting device 1 is divided into 16 areas or includes 16 areas. In the accompanying drawings, reference numerals R1 to R4 may refer to row numbers, and reference numerals C1 to C4 may refer to column numbers. In the following, the divided areas may be referred to as (Rn, Cn). Here, n may be a natural number from 1 to 4.

[0109] exist Figure 5 In the embodiment of the present invention, based on the size of the amplitude (displacement) when the driving signal is input to the divided area, the divided area can be divided into the first group to the third group. The first group may include four divided areas (R2, C2), (R2, C3), (R3, C2) and (R3, C3). Two vibration devices adjacent to a vibration device may be located in four divided areas, so the stress transmitted from the vibration devices 11, 12, 13 and 14 to the vibration member 20 may be the strongest. Therefore, based on the stress transmitted from the vibration devices 11, 12, 13 and 14 to the vibration member 20, in the divided area included in the first group, the displacement of the vibration member 20 may have the maximum value among the three groups. For example, the vibration member 20 may vibrate in a Gaussian shape based on the displacement of the divided area included in the first group, so the sound pressure level characteristics of a specific sound frequency band (or a specific level vibration mode) may be improved.

[0110] The second group may include four divided areas (R2, C1), (R1, C3), (R3, C4) and (R4, C2) in the area of ​​the main surface of the vibration member 20 where the vibration devices 11, 12, 13 and 14 are provided, except for the first group. The third group may include eight divided areas (R1, C1), (R1, C2), (R1, C4), (R2, C4), (R3, C1), (R4, C1), (R4, C3) and (R4, C4) where no vibration devices are provided on the main surface of the vibration member 20. In the divided areas included in the third group, the displacement of the vibration member 20 may have the minimum value among the three groups. In addition, based on the stress transmitted to the vibration member 20 from each of the vibration devices 11, 12, 13 and 14, in the divided areas included in the second group, the displacement of the vibration member 20 may have a value smaller than the first group and greater than the third group.

[0111] The improvement of the sound quality of the sound emitting device 1 according to the embodiment of the present disclosure may be described with reference to actual measurement data. Figure 6 is a graph showing the sound characteristics of the sound emitting device according to an embodiment of the present disclosure. Figure 6 In the figure, the horizontal axis represents the frequency (Hz) based on a logarithmic scale, and the vertical axis represents the amplitude (or sound pressure level) based on the decibel (dB) unit. Figure 6 The curve shown by the solid line is the sound characteristic of the sound-generating device 1 according to the embodiment of the present disclosure. The curve shown by the dashed line is the sound characteristic of the sound-generating device (hereinafter referred to as Experimental Example 1) in which four piezoelectric devices are arranged (or set) on the main surface of the vibration member 20 in a 2×2 double-layer structure. The curve shown by the dot-dash line is the sound characteristic of the sound-generating device (hereinafter referred to as Experimental Example 2) in which two piezoelectric devices are arranged (or set) in parallel on the main surface of the vibration member 20.

[0112] exist Figure 6 , comparing the three curves, in the configuration according to the embodiment of the present disclosure, it can be seen that the amplitude is completely smaller than the configuration of each of Experimental Examples 1 and 2. However, in the frequency band of approximately 250 Hz to 500 Hz (e.g., the bass region), it can be seen that the configuration according to the embodiment of the present disclosure has a larger amplitude than the configuration of each of Experimental Examples 1 and 2. In particular, in the three curves, it can be seen that there is a large difference in the amplitude values ​​at frequencies above 370 Hz. For example, compared with the experimental examples, in the sound-emitting device 1 according to the embodiment of the present disclosure, it can be seen that the sound pressure level increases by approximately 10 dB or more at frequencies above 370 Hz.

[0113] Furthermore, based on the above-mentioned experiments, the inventors of the present disclosure have recognized that when the vibration device disposed on the main surface of the vibration member 20 vibrates based on the drive signal input from the drive circuit, the displacement shape in the surface of the vibration member 20 exhibits a shape pattern such as a windmill in a three-dimensional (3D) coordinate system. Furthermore, the inventors of the present disclosure have recognized that the amplitude in a specific frequency band (e.g., a bass region) can be adjusted for each region of the main surface of the vibration member 20 by changing the arrangement pattern of the vibration member 20 based on the displacement shape in the main surface of the vibration member 20.

[0114] According to the sound-generating device 1 of the embodiment of the present disclosure, the short side of one of the vibration devices 11, 12, 13, and 14 may be opposite to the long side of another vibration device adjacent to the main surface of the vibration member 20. Therefore, the positional relationship between the vibration devices 11 to 14 and the vibration member 20 may form a plurality of regions capable of structurally adjusting the amplitude (or displacement amount) in the main surface of the vibration member 20.

[0115] In addition, the vibration devices 11, 12, 13, and 14 can be connected in parallel to a common drive circuit, so when a drive signal is input to the drive circuit, the vibration devices 11, 12, 13, and 14 can vibrate in synchronization with each other. Based on this configuration, it is not necessary to individually control the vibration devices 11, 12, 13, and 14 by a special algorithm, so the vibration devices 11, 12, 13, and 14 can be controlled by a regional unit. For example, the vibration of the vibration devices 11, 12, 13, and 14 can be controlled by a common drive signal for each region, so that an increase in the sound pressure level in the bass region can be achieved.

[0116] In other words, the resonance frequency of the treble region can be lowered, and a relatively flat frequency characteristic can be provided in a wider frequency band from the bass region to the treble region. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality from the bass band to the treble band can be improved. For example, the bass band can be below 200 Hz, below 300 Hz, or below 500 Hz, but the embodiment of the present disclosure is not limited thereto. For example, the treble band can be above 1 kHz, above 2 kHz, or above 3 kHz, but the embodiment of the present disclosure is not limited thereto.

[0117] In addition, the vibration devices 11, 12, 13 and 14 can be arranged to be rotationally symmetrical in a plane. Therefore, when the vibration devices 11, 12, 13 and 14 are driven (or displaced or vibrated) by a driving signal, stress can be transmitted from each of the vibration devices 11, 12, 13 and 14 to the vibration member 20 under the same condition (or the same state), thereby improving the sound quality.

[0118] [Second embodiment]

[0119] In the embodiment of the present disclosure, a modified example of the structure of the sound generating device 1 according to the first embodiment of the present disclosure will be described. The structure of each of the vibration member 20 and the vibration devices 11, 12, 13 and 14 may be substantially the same as the first embodiment of the present disclosure, and thus the description may be omitted.

[0120] Figure 7 : is a plan view showing the configuration of the sound emission device 1 according to the embodiment of the present disclosure. Figure 8 is along Figure 7 The cross-sectional view taken along the line BB' of Figure 7 and Figure 8 A detailed configuration of the sound emission device 1 according to an embodiment of the present disclosure is described.

[0121] like Figure 7 and Figure 8 As shown, the sound-emitting device 1 according to an embodiment of the present disclosure may be different from the sound-emitting device 1 according to the first embodiment of the present disclosure in that a mass member 30 having a circular shape is stacked above the vibration devices 11, 12, 13 and 14 or above all four vibration devices 11, 12, 13 and 14.

[0122] The mass member (or weight member) 30 may be a circular plate having a certain (or predetermined) weight, but the embodiments of the present disclosure are not limited thereto. The mass member 30 may be a member having a certain (or predetermined) weight and configured to reduce the resonant frequency in the sound-emitting device 1. For example, the mass member 30 may be composed of materials such as metal, resin, glass, hard paper, wood, rubber, plastic, fiber, cloth, paper, leather, or carbon, but the embodiments of the present disclosure are not limited thereto. In the embodiments of the present disclosure, the mass member 30 may be a metal plate. For example, an example of a metal that may be configured as the mass member 30 may use stainless steel, but the embodiments of the present disclosure are not limited thereto.

[0123] In addition, in the plane, the center of the mass member 30 can be consistent with or correspond to the rotational symmetry center (symmetry center point O) of the vibration devices 11, 12, 13 and 14. The sizes of the vibration devices 11, 12, 13 and 14 can be consistent. Therefore, the mass member 30 can be in contact with each of the vibration devices 11, 12, 13 and 14 under the same conditions (or the same state). The mass member 30 can be connected to each of the vibration devices 11, 12, 13 and 14 through the bonding member 41. The bonding member 41 can be disposed between the mass member 30 and each of the vibration devices 11, 12, 13 and 14. For example, the bonding member 41 can be similar to the above reference numerals of the first embodiment of the present disclosure. Figure 4 The bonding member 15 is described, and therefore, a detailed description thereof may be omitted.

[0124] In addition, the radius r1 of the mass member 30 may be shorter than the length of each of the short sides S11, S21, S31, and S41 of the vibration devices 11, 12, 13, and 14. Therefore, the mass member 30 of the embodiment of the present disclosure may be different from the above reference numeral 30 of the first embodiment of the present disclosure. Figure 5 The mass member 30 may be in contact with the partial portions (or some portions) of the four divided regions (R2, C2), (R2, C3), (R3, C2) and (R3, C3) in the first group described above. Figure 5 Partial portions (or some portions) of the four divided regions (R2, C2), (R2, C3), (R3, C2), and (R3, C3) in the first group described overlap.

[0125] When an alternating current (AC) voltage is applied between the first electrode and the second electrode of each of the vibration devices 11, 12, 13, and 14, each vibration layer may expand and / or contract, and a periodic stress may be applied (or transferred) to the vibration member 20 located on the first main surface side (negative direction of the z-axis in the drawing) of the vibration device. Vibration and / or sound based on a voice signal may be generated by bending vibration of the vibration member 20 based on the applied (or transferred) stress.

[0126] According to the sound-emitting device 1 of the embodiment of the present disclosure, the mass member 30 can be arranged in a specific (or predetermined) divided area of ​​the second main surface of each of the vibration devices 11, 12, 13 and 14, and thus, the resonance frequency of the entire sound-emitting device 1 can be reduced. Specifically, the resonance frequency of the treble region can be reduced, and a relatively flat frequency characteristic (or flatness characteristic) can be provided in a wider frequency band from the bass region to the treble region. For example, a sound-emitting device 1 having an improved flatness characteristic of sound can be provided. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0127] Furthermore, in the embodiment of the present disclosure, a metal plate that applies a load to each of the vibration devices 11, 12, 13, and 14 in the negative direction of the z-axis may constitute the mass member 30, but the mass member 30 is not limited to the metal plate. For example, a vibration control sheet (or a vibration damping sheet or a vibration absorbing sheet) that absorbs the vibration of each of the vibration devices 11, 12, 13, and 14 may be configured as the mass member 30. For example, the vibration control sheet may be a resin material. Furthermore, as Figure 8As shown by the dotted line in , a passive panel 200 in which the member itself resonates based on the vibration of each of the multiple vibration devices can be used as the mass member 30. The passive panel 200 can be metal, but the embodiments of the present disclosure are not limited thereto. For example, the mass member 30 can be configured at the center portion of each of the vibration devices 11, 12, 13, and 14, and thus, the weight at the center portion of each of the vibration devices 11, 12, 13, and 14 can be increased. Therefore, the sound pressure level characteristics and / or sound characteristics of the low frequency band can be improved.

[0128] [Third embodiment]

[0129] In the embodiments of the present disclosure, a modified example of the structure of the sound-emitting device 1 according to the first embodiment of the present disclosure will be described. The structures of the vibration member 20 and the vibration devices 11, 12, 13 and 14 can be substantially the same as those of the first embodiment of the present disclosure, so the description is omitted, and the difference from the second embodiment of the present disclosure will be mainly described below.

[0130] Fig. 9 : is a plan view showing the configuration of the sound emission device 1 according to the embodiment of the present disclosure. Fig.10 According to the embodiment of the present disclosure Fig. 9 The cross-sectional view taken along the line C-C' of Fig. 9 and Fig.10 A detailed configuration of the sound emission device 1 according to an embodiment of the present disclosure is described.

[0131] like Fig. 9 and Fig.10 As shown, the sound generating device 1 according to the embodiment of the present disclosure may be different from the sound generating device 1 according to the second embodiment of the present disclosure in that the radius of the mass member 30 is increased and the elastic member 40 is provided between the mass member 30 and each vibration device.

[0132] In a plane, the mass member 30 may have a circular shape. For example, the mass member 30 may be a circular plate having a certain (or predetermined) weight, but the embodiments of the present disclosure are not limited thereto. In addition, the center of the mass member 30 may coincide with or correspond to the rotational symmetry center (symmetry center point O) of the vibration devices 11, 12, 13, and 14. The radius r2 of the mass member 30 may be longer than the short sides S11, S21, S31, and S41 of the vibration devices 11, 12, 13, and 14, and may be shorter than the long sides L12, L22, L32, and L42 of the vibration devices 11, 12, 13, and 14.

[0133] The elastic member 40 may be connected to the mass member 30 and the vibration devices 11, 12, 13, and 14 by adhesive members 41 and 42 (or adhesive layers), respectively. The elastic member 40 may be connected to the mass member 30 and the vibration devices 11, 12, 13, and 14 by adhesive members 41. The elastic member 40 may be connected to the mass member 30 by adhesive members 42. Adhesive members 41 and 42 may include soft adhesive materials, or may include hard adhesive materials. For example, the elastic member 40 may be configured by using materials such as resins, but the embodiments of the present disclosure are not limited thereto. Examples of resins that may be configured as the elastic member 40 may use polyurethane or polyethylene terephthalate (PET), but the embodiments of the present disclosure are not limited thereto. At least a portion of the elastic member 40 may have a hexahedral shape. For example, the elastic member 40 may have a rectangular shape in a plan view and a cross-sectional view. At least a portion of the elastic member 40 may have a cylindrical shape or an elliptical cylindrical shape. For example, the elastic member 40 may be circular or elliptical in a plan view, or may have a rectangular shape in a cross-sectional view. The elastic member 40 may be a transmitting member or a vibration transmitting member that transmits vibration generated by each of the vibration devices 11 , 12 , 13 , and 14 to the mass member 30 based on a driving signal input thereto.

[0134] When an alternating current (AC) voltage is applied between the first electrode and the second electrode of each of the vibration devices 11, 12, 13, and 14, each vibration layer may expand and contract, and periodic stress may be applied (or transmitted) to the elastic member 40 and the mass member 30 located on the second main surface side (positive direction of the z-axis in the drawing) of the vibration member 20 located on the second main surface side (negative direction of the z-axis in the drawing) of each of the vibration devices 11, 12, 13, and 14. Vibration and / or sound based on a voice signal may be generated by bending vibration of the vibration member 20 based on the applied (or transmitted) stress.

[0135] Compared with the second embodiment of the present disclosure, in the sound-emitting device 1 according to the embodiment of the present disclosure, the radius of the mass member 30 can be longer, and the area in contact with the vibration devices 11, 12, 13, and 14 can be wider. Therefore, the sound-emitting device 1 according to the embodiment of the present disclosure can control the resonance frequency of the sound-emitting device 1 within a wider range than the second embodiment of the present disclosure.

[0136] In addition, the elastic member 40 can be configured between the mass member 30 and each of the vibration devices 11, 12, 13 and 14, so that the resonance frequency of the entire sound-emitting device 1 can be further appropriately reduced. Specifically, the resonance frequency of the treble region can be reduced, and a relatively flat frequency characteristic can be provided in a wider frequency band from the bass region to the treble region. For example, a sound-emitting device 1 with improved flatness characteristics of the sound can be provided. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0137] [Fourth embodiment]

[0138] In the embodiment of the present disclosure, a modified example of the structure of the sound-emitting device 1 according to the second embodiment of the present disclosure will be described. The structure of the vibration member 20 and the vibration devices 11, 12, 13 and 14 can be substantially the same as that of the first embodiment of the present disclosure, so the description is omitted, and the difference from the second embodiment of the present disclosure will be mainly described below.

[0139] Fig.11A is a plan view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig. 11B is a perspective view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig.11A and Fig. 11B As shown, the difference between the sound-emitting device 1 according to the embodiment of the present disclosure and the sound-emitting device 1 according to the second embodiment of the present disclosure may be that the mass member 30 has a circular ring shape, and the position where the mass member 30 is stacked on the second main surface of the four vibration devices 11, 12, 13 and 14 is defined as a divided area in the peripheral direction.

[0140] In addition, in the plane, the center of the mass member 30 may coincide with or correspond to the rotational symmetry center (symmetry center point O) of the vibration devices 11, 12, 13, and 14. For example, the mass member 30 may be connected to each of the vibration devices 11, 12, 13, and 14 through bonding members 51, 52, 53, and 54. The bonding members 51, 52, 53, and 54 may be disposed between the mass member 30 and each of the vibration devices 11, 12, 13, and 14. For example, the bonding members 51, 52, 53, and 54 may be similar to the above reference numerals of the first embodiment of the present disclosure. Figure 4 The bonding member 15 is described, and therefore, a detailed description thereof may be omitted.

[0141] In addition, in the plane, the inner radius r3 of the mass member 30 may be longer than the short sides S11, S21, S31, and S41 of the vibration devices 11, 12, 13, and 14. In addition, the outer radius r4 of the mass member 30 may be shorter than the long sides L12, L22, L32, and L42 of the vibration devices 11, 12, 13, and 14. Therefore, the mass member 30 according to the embodiment of the present disclosure may be different from the above reference 1 embodiment of the present disclosure. Figure 5 The local parts (or some parts) of the four divided areas (R2, C1), (R1, C3), (R3, C4) and (R4, C2) in the second group described are in contact. The mass member 30 can be in contact with each of the vibration devices 11, 12, 13 and 14 under the same condition (or the same state).

[0142] In the plane, the inner periphery of the mass member 30 and the outer periphery of the mass member 30 may be arranged on concentric circles starting from the symmetric center point O. For example, the mass member 30 may include a circular ring shape or an annular shape, but the embodiments of the present disclosure are not limited thereto. For example, the mass member 30 may include an annular shape including a hollow hole having an inner radius r3. For example, the mass member 30 may include a circular ring shape having an inner radius r3, but the embodiments of the present disclosure are not limited thereto.

[0143] According to the sound-emitting device 1 of the embodiment of the present disclosure, the mass member 30 can be configured in a specific (or predetermined) divided area of ​​the second main surface of each of the vibration devices 11, 12, 13 and 14, so that the resonance frequency of the entire sound-emitting device 1 can be reduced. Specifically, the resonance frequency of the treble region can be reduced, and a relatively flat frequency characteristic can be provided in a wider frequency band from the bass region to the treble region. For example, a sound-emitting device 1 with improved flatness characteristics of the sound can be provided. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0144] [Fifth embodiment]

[0145] In the embodiments of the present disclosure, a modified example of the structure of the sound-emitting device 1 according to the first embodiment of the present disclosure will be described. The structures of the vibration member 20 and the vibration devices 11, 12, 13 and 14 can be substantially the same as those of the first embodiment of the present disclosure, so the description is omitted, and the difference from the second embodiment of the present disclosure will be mainly described below.

[0146] Fig. 12A is a plan view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig. 12B is a perspective view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig. 12A and Fig. 12BAs shown, the sound generating device 1 according to the embodiment of the present disclosure may be different from the sound generating device 1 according to the second embodiment of the present disclosure in that mass members 31 , 32 , 33 , and 34 are stacked on the vibration devices 11 , 12 , 13 , and 14 , respectively.

[0147] The mass members 31, 32, 33 and 34 may be disposed close to short sides S12, S22, S32 and S42 of a pair of short sides of each of the vibration devices 11, 12, 13 and 14 that are not opposite to the vibration devices 11, 12, 13 and 14. In addition, in a plane, the center of each of the mass members 31, 32, 33 and 34 may be disposed on concentric circles starting from the symmetry center point O.

[0148] In the plane, the mass members 31, 32, 33 and 34 may be disposed near the short sides S12, S22, S32 and S42 of a pair of short sides of each of the vibration devices 11, 12, 13 and 14 that are not opposite to the vibration devices 11, 12, 13 and 14. For example, the mass members 31, 32, 33 and 34 may be disposed at edge portions (or peripheral portions) of the vibration devices 11, 12, 13 and 14 that are adjacent to the side (or outer side wall) of the vibration member 20, respectively. For example, the mass members 31, 32, 33 and 34 may be disposed at edge portions (or peripheral portions) of the vibration devices 11, 12, 13 and 14 that are adjacent to the side (or outer side wall) of the vibration member 20, respectively. For example, the mass members 31, 32, 33 and 34 may be disposed at edge portions (or peripheral portions) of the regions of the vibration devices 11, 12, 13 and 14 that are located between the side (or outer side wall) of the vibration member 20 and the center of the vibration devices 11, 12, 13 and 14, respectively.

[0149] Each of the mass members 31, 32, 33, and 34 may be connected to each of the vibration devices 11, 12, 13, and 14 by means of bonding members 61, 62, 63, and 64. The bonding members 61, 62, 63, and 64 may be provided between each of the mass members 31 to 34 and each of the vibration devices 11 to 14. For example, the bonding members 61, 62, 63, and 64 may be similar to those described above with reference to the first embodiment of the present disclosure. Figure 4 The bonding member 15 is described, and therefore, a detailed description thereof may be omitted.

[0150] According to the sound-emitting device 1 of the embodiment of the present disclosure, the mass members 31, 32, 33 and 34 can be arranged in a specific (or predetermined) divided area of ​​the second main surface of each of the vibration devices 11, 12, 13 and 14, so that the resonance frequency of the entire sound-emitting device 1 can be reduced. Specifically, the resonance frequency of the treble region can be reduced, and a relatively flat frequency characteristic can be provided in a wider frequency band from the bass region to the treble region. For example, a sound-emitting device 1 with improved flatness characteristics of the sound can be provided. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0151] [Sixth embodiment]

[0152] In the embodiment of the present disclosure, a modified example of the structure of the sound generating device 1 according to the first embodiment of the present disclosure will be described. The structures of the vibration member 20 and the vibration devices 11, 12 and 13 may be substantially the same as the first embodiment of the present disclosure, and thus description is omitted.

[0153] Fig.13A is a plan view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig. 13B is a perspective view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig.13A and Fig. 13B As shown, the sound generating device 1 according to the embodiment of the present disclosure may be different from the sound generating device 1 according to the second embodiment of the present disclosure in that the number of vibration devices is three and a plurality of vibration devices are provided.

[0154] In the plane, the vibration device 11 may be arranged non-rotationally symmetrically. At the same time, the vibration devices 12 and 13 may be arranged to be rotationally symmetrical with respect to the symmetry center point O of the vibration member 20. In addition, the vibration devices 12 and 13 may be arranged so that the center line on the long axis direction (y-axis direction in the drawing) shown by the dotted line is offset relative to the symmetry center point O. The short side S21 of the vibration device 12 may be opposite to the long side L11 of the vibration device 11, and the short side S31 of the vibration device 13 may be opposite to the short side L12 of the vibration device 11. For example, the center of the vibration device 11 may be consistent with or corresponding to the symmetry center point O of the vibration member 20. The long axis direction of the vibration device 11 may be arranged to be parallel to the x-axis, and may intersect with the long axis direction of each of the vibration devices 12 and 13. For example, the long axis direction of each of the vibration devices 12 and 13 may be arranged parallel to the y-axis, and may be arranged in parallel without being consistent or corresponding. For example, the center of the vibration device 11 may be arranged to be offset between the long axis directions of the vibration devices 12 and 13. For example, each of the vibration devices 11, 12, and 13 may be connected to the vibration member 20 by means of adhesive members 15, 16, and 17. The adhesive members 15, 16, and 17 may be provided between the first main surface 20a of the vibration member 20 and each of the vibration devices 11, 12, and 13. For example, the adhesive members 15, 16, and 17 may be similar to those described above with reference to the first embodiment of the present disclosure. Figure 4 The bonding members 15, 16, and 17 are described, and therefore, a detailed description thereof may be omitted.

[0155] According to the sound-emitting device 1 of the embodiment of the present disclosure, similar to the first embodiment of the present disclosure, the resonance frequency of the entire sound-emitting device 1 can be reduced based on the arrangement of the plurality of vibration devices 11 to 13 at the main surface of the vibration member 20. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0156] [Seventh embodiment]

[0157] In the embodiment of the present disclosure, a modified example of the structure of the sound generating device 1 according to the first embodiment of the present disclosure will be described. The structures of the vibration member 20 and the vibration devices 11, 12 and 13 may be substantially the same as the first embodiment of the present disclosure, and thus description is omitted.

[0158] Fig.14A is a plan view showing the configuration of a sound emitting device according to an embodiment of the present disclosure. Fig. 14B is a perspective view showing the configuration of a sound emitting device according to a seventh embodiment of the present disclosure. Fig.14A and Fig. 14B As shown, the sound generating device 1 according to the embodiment of the present disclosure may be different from the sound generating device 1 according to the first embodiment of the present disclosure in that the number of vibration devices is three and a plurality of vibration devices are provided.

[0159] In the plane, the vibration devices 12 and 13 may be arranged to be rotationally symmetrical with respect to the symmetry center point O of each of the vibration device 11 and the vibration member 20. In addition, the vibration device 12 and the vibration device 13 may be arranged so that the center line on the long axis direction (y-axis direction in the drawing) shown by the dotted line passes through the symmetry center point O of the vibration device 11. The short side S21 of the vibration device 12 may be opposite to the long side L11 of the vibration device 11, and the short side S31 of the vibration device 13 may be opposite to the long side L12 of the vibration device 11. For example, the center of the vibration device 11 may be consistent with or correspond to the symmetry center point O of the vibration member 20. The long axis direction of the vibration device 11 may be arranged to be parallel to the x-axis, and may intersect with the long axis direction of each of the vibration devices 12 and 13. For example, the long axis direction of each of the vibration devices 12 and 13 may be arranged in parallel with the y-axis, and may be consistent or corresponding. For example, the long axis direction of each of the vibration devices 12 and 13 may be arranged to pass through the center of the vibration device 11 and the symmetry center point O of the vibration member 20. For example, each of the vibration devices 11, 12, and 13 may be connected to the vibration member 20 by means of adhesive members 15, 16, and 17. The adhesive members 15, 16, and 17 may be provided between the first main surface 20a of the vibration member 20 and each of the vibration devices 11, 12, and 13. For example, the adhesive members 15, 16, and 17 may be similar to those described above with reference to the first embodiment of the present disclosure. Figure 4The bonding members 15, 16, and 17 are described, and therefore, a detailed description thereof may be omitted.

[0160] According to the sound-emitting device 1 of the embodiment of the present disclosure, similar to the first embodiment of the present disclosure, the resonance frequency of the entire sound-emitting device 1 can be reduced based on the arrangement of the plurality of vibration devices 11 to 13 at the main surface of the vibration member 20. Therefore, according to the sound-emitting device 1 of the embodiment of the present disclosure, the sound quality can be improved.

[0161] [Eighth Embodiment]

[0162] In the embodiment of the present disclosure, a modified example of the structure of the vibrating device in the sound generating device 1 according to the eighth embodiment of the present disclosure will be described. Fig.15 : is a plan view showing the configuration of a vibration device according to an eighth embodiment of the present disclosure. Fig.16 According to the eighth embodiment of the present disclosure, Fig.15 Cross-sectional view taken along line D-D'.

[0163] like Fig.15 and Fig.16 As shown, each of the vibration devices 11 , 12 , 13 , and 14 according to the embodiment of the present disclosure may include a vibration generating portion (or vibration portion) 11A.

[0164] The vibration generating portion 11A may include a vibration layer 112, a first electrode 111 at a first surface of the vibration layer 112, and a second electrode 113 at a second surface of the vibration layer 112 different from the first surface. The vibration layer 112 may be connected to Figure 4 The vibration layer 112 described is substantially the same, so repeated description is omitted. The first electrode 111 and the second electrode 113 can be arranged so that the vibration layer 112 is located between the first electrode 111 and the second electrode 113 in the thickness direction, and the first electrode 111 and the second electrode 113 can apply a voltage to the vibration layer 112. The polarization direction of the vibration layer 112 can be the positive direction (or positive direction) of the z-axis or the negative direction (or negative direction) of the z-axis. In addition, wiring (or wire) for applying a voltage to each electrode can be connected to the electrodes 111 and 113.

[0165] Each of the vibration devices 11, 12, 13 and 14 according to the embodiments of the present disclosure may further include a first protective layer (or a first protective member) 117 and a second protective layer (or a second protective member) 118. The first protective layer 117 may be connected to the first surface (or the front surface or the upper surface) of the vibration generating part 11A. The first protective layer 117 may protect the first surface of the vibration generating part 11A and insulate the first surface of the vibration generating part 11A. The second protective layer 118 may be connected to the second surface (or the rear surface or the lower surface) of the vibration generating part 11A. The second protective layer 118 may protect the second surface of the vibration generating part 11A and insulate the second surface of the vibration generating part 11A. For example, any one of the first protective layer 117 and the second protective layer 118 in the vibration devices 11, 12, 13 and 14 may be connected to the vibration member by adhesive layers 119a and 119b. For example, the adhesive layers 119a and 119b may be composed of an adhesive resin material, an adhesive or an adhesive tape, etc., but the embodiments of the present disclosure are not limited thereto. The adhesive layers 119 a and 119 b may include an epoxy group, an acrylic group, a silicone group, or a urethane group, but the embodiments of the present disclosure are not limited thereto.

[0166] The first protective layer 117 may be connected to the first electrode 111 or combined with the first electrode 111 through the first adhesive layer 119a. The second protective layer 118 may be connected to the second electrode 113 or combined with the second electrode 113 through the second adhesive layer 119b. The first adhesive layer 119a and the second adhesive layer 119b may be configured in the area between the first protective layer 117 and the second protective layer 118 to completely surround the vibration generating part 11A. For example, the vibration generating part 11A may be embedded or built into the area between the first adhesive layer 119a and the second adhesive layer 119b. For example, the first adhesive layer 119a and the second adhesive layer 119b may be a polyimide (PI) film, a polyethylene terephthalate (PET) film, or a polyethylene naphthalate (PEN) film, but the embodiments of the present disclosure are not limited thereto.

[0167] [Ninth Embodiment]

[0168] In the embodiment of the present disclosure, a modified example of the structure of the vibration layer in the vibration device of the sound generating apparatus 1 according to the fifth embodiment of the present disclosure will be described. Fig.17 is a perspective view showing a vibration layer in a vibration device of a sound generating apparatus according to an embodiment of the present disclosure.

[0169] like Fig.17As shown, in each of the vibration devices 11, 12, 13, and 14 according to the embodiments of the present disclosure, the vibration layer 112 of the vibration generating portion 11A may include a plurality of first portions 112a and one or more second portions 112b. For example, the vibration layer 112 may include a plurality of first portions 112a and a plurality of second portions 112b between the plurality of first portions 112a. For example, the plurality of first portions 112a and the plurality of second portions 112b may be alternately and repeatedly arranged along the x-axis direction, but the embodiments of the present disclosure are not limited thereto.

[0170] Each of the plurality of first portions 112a may include an inorganic material having piezoelectric properties. For example, each of the plurality of first portions 112a may be an inorganic material portion or a piezoelectric material portion. Each of the plurality of first portions 112a may have a first width parallel to the x-axis direction and may extend along the y-axis direction. Each of the plurality of first portions 112a may be similar to the first portion 112a described above. Figure 4 The described vibration layer 112 is substantially the same, and thus, repeated description may be omitted.

[0171] Each of the plurality of second portions 112b may be disposed in an area between the plurality of first portions 112a. For example, each of the plurality of first portions 112a may be disposed in an area between two adjacent second portions 112b among the plurality of second portions 112b. For example, the plurality of first portions 112a and the plurality of second portions 112b may include linear shapes or strip shapes having the same size or different sizes.

[0172] Each of the plurality of second parts 112b may be configured to fill the gap between two adjacent first parts in the plurality of first parts 112a. Each of the plurality of first parts 112a and the plurality of second parts 112b may be arranged (or arranged) in parallel with each other in the same plane (or the same layer). Each of the plurality of second parts 112b may absorb the impact applied to the first part 112a, thereby improving the durability of the first part 112a and providing flexibility for the vibration devices 11, 12, 13 and 14. Each of the plurality of second parts 112b may include an organic material having ductility. For example, each of the plurality of second parts 112b may include one or more of an epoxy-based polymer, an acrylic-based polymer and a silicone-based polymer, but the embodiments of the present disclosure are not limited thereto. For example, each of the plurality of second parts 112b may be an organic part, an organic material, an adhesive part, a telescopic part, a bending part, a damping part, an elastic part, an elastic part or an extension part, etc., but the embodiments of the present disclosure are not limited thereto.

[0173] A first surface of each of the plurality of first portions 112a and the plurality of second portions 112b may be commonly connected to the first electrode. A second surface of each of the plurality of first portions 112a and the plurality of second portions 112b may be commonly connected to the second electrode.

[0174] In each of the vibration devices 11, 12, 13 and 14 of the sound-emitting device 1 according to the ninth embodiment of the present disclosure, a plurality of first parts 112a and a plurality of second parts 112b may be arranged in (or connected to) the same plane, and therefore, the vibration layer 112 may have a single-layer film type. Therefore, each of the vibration devices 11, 12, 13 and 14 may vibrate in a vertical direction by the first part 112a having vibration characteristics, and may be bent in a curved shape by the second part 112b having flexibility. For example, each of the vibration devices 11, 12, 13 and 14 including the vibration layer 112 may have a 2-2 composite structure, and therefore, may have a resonant frequency below 20 kHz, but the embodiments of the present disclosure are not limited thereto.

[0175] [Tenth embodiment]

[0176] In the embodiment of the present disclosure, a modified example of the structure of the vibration layer in the vibration device of the sound generating apparatus 1 according to the tenth embodiment of the present disclosure will be described. Fig.18 is a perspective view showing a vibration layer in a vibration device of a sound generating apparatus according to a tenth embodiment of the present disclosure.

[0177] like Fig.18 As shown, in each of the vibration devices 11, 12, 13 and 14 according to the embodiments of the present disclosure, the vibration layer 112 of the vibration generating portion 11A may include a plurality of first portions 112a and a second portion 112b. For example, the vibration layer 112 may include a plurality of first portions 112a and a second portion 112b disposed between the plurality of first portions 112a.

[0178] Each of the plurality of first portions 112a may be arranged to be spaced apart from each other in each of the x-axis direction and the y-axis direction. For example, each of the plurality of first portions 112a may have a hexahedral shape with the same size and may be arranged in a grid shape. Each of the plurality of first portions 112a may be similar to the above reference Fig.17 The first portion 112a of the description is substantially the same, and thus, a repeated description may be omitted.

[0179] The second portion 112b may be disposed between the plurality of first portions 112a in each of the x-axis direction and the y-axis direction. The second portion 112b may be configured to fill a gap or space between two adjacent first portions 112a, or to surround each of the plurality of first portions 112a, and thus, the second portion 112b may be connected to or attached to a side surface of an adjacent first portion 112a. The second portion 112b may be similar to the above reference Fig.17 The second portion 112b of the description is substantially the same, and thus, a repeated description may be omitted.

[0180] A first surface of each of the plurality of first portions 112a and second portions 112b may be commonly connected to the first electrode. A second surface of each of the plurality of first portions 112a and second portions 112b may be commonly connected to the second electrode.

[0181] In each of the vibration devices 11, 12, 13 and 14 of the sound-emitting device according to the tenth embodiment of the present disclosure, a plurality of first parts 112a and second parts 112b may be arranged in (or connected to) the same plane, and therefore, the vibration layer 112 may have a single-layer film type. Therefore, each of the vibration devices 11, 12, 13 and 14 may vibrate in a vertical direction by the first part 112a having vibration characteristics, and may bend in a curved shape by the second part 112b having flexibility. For example, each of the vibration devices 11, 12, 13 and 14 including the vibration layer 112 may have a 1-3 composite structure, and therefore, may have a resonant frequency below 20 kHz, but the embodiments of the present disclosure are not limited thereto.

[0182] [Eleventh Embodiment]

[0183] In the embodiments of the present disclosure, a detailed configuration example in which the sound-emitting device 1 according to the first to tenth embodiments of the present disclosure is a display device and the vibration member 90 performs the function of a display panel of the display device will be described. The description of common elements that are substantially the same as the first to fifth embodiments of the present disclosure may be omitted or will be briefly given below.

[0184] Fig.19 1 is a configuration diagram of a display device 70 according to an eleventh embodiment of the present disclosure. For example, the purpose of use of the display device 70 according to an embodiment of the present disclosure may be an electronic poster, a digital bulletin board, an electronic billboard, a computer screen, or a television receiver, etc., but the embodiments of the present disclosure are not limited thereto. The structure of the host system 7 and the vibration devices 11, 12, 13, and 14 may be substantially the same as one of the first to tenth embodiments of the present disclosure, and thus the description may be omitted.

[0185] like Fig.19 As shown, the display device 70 may include: a sound device including vibration devices 11, 12, 13 and 14; a controller 200; a panel controller 300; a data driving circuit 400; a gate driving circuit 500; and a display panel 600. The display device 70 may be a device that displays an image through the display panel 600 based on input RGB data (or RGBW data) and the like and generates sound based on a driving signal input thereto and the like.

[0186] The panel controller 300 may control the data driving circuit 400 and the gate driving circuit 500 based on the image data and the timing signal input from the host system 7. The data driving circuit 400 may supply a data voltage and the like to the plurality of pixels P through a driving line 410 provided at each column of pixels among the plurality of pixels P. The gate driving circuit 500 may supply a control signal to the plurality of pixels P through a driving line 510 provided at each row of pixels among the plurality of pixels P. In addition, each of the driving line 410 and the driving line 510 may be provided as a plurality of lines (or wirings).

[0187] The display panel 600 may include a plurality of pixels P arranged to configure a plurality of rows and columns. When the display device 70 displays a color image, the pixel P may be a sub-pixel that displays any one of a plurality of colors (eg, RGB or RGBW data) that implement the color image.

[0188] The display panel 600 used in one or more embodiments of the present disclosure may use display panels of all types (or shapes) such as a liquid crystal display panel, an organic light-emitting display panel, and an electroluminescent display panel. However, the embodiments of the present disclosure are not limited thereto. The display panel 600 may be a display panel that vibrates to generate sound through a sound-generating device according to an embodiment of the present disclosure. The type (or shape) or size of the display panel 600 applied to the display device 70 according to an embodiment of the present disclosure may not be limited.

[0189] According to one or more embodiments of the present disclosure, when the display panel 600 is a liquid crystal display panel, the display panel 600 may include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively arranged at each intersection area of ​​the gate lines and the data lines. In addition, the display panel 600 may include: an array substrate including a thin film transistor (TFT) as a switching element for adjusting the transmittance of each of the plurality of pixels P, an upper substrate including a color filter and / or a black matrix, etc., and a liquid crystal layer between the array substrate and the upper substrate.

[0190] When the display panel 600 is an organic light-emitting display panel, the display panel 600 may include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively arranged at each intersection area of ​​the gate lines and the data lines. In addition, the display panel 600 may include: an array substrate including a TFT as an element for selectively applying a voltage to each pixel P; an organic light-emitting device layer on the array substrate; and an encapsulation substrate arranged on the array substrate to cover the organic light-emitting device layer. The encapsulation substrate may protect the TFT and the organic light-emitting device layer from external impacts, and may prevent moisture or oxygen from penetrating into the organic light-emitting device layer. In addition, the layer formed on the array substrate may include an inorganic light-emitting layer (e.g., a nano-sized material layer, a quantum dot light-emitting layer, etc.). As another embodiment of the present disclosure, the layer formed on the array substrate may include a micro light-emitting diode.

[0191] The display panel 600 may further include a backing, for example, a metal plate, attached to the display panel 600. However, the display panel 600 may include other structures, for example, other structures formed of different materials.

[0192] Each of the controller 200, the panel controller 300, the data driving circuit 400, and the gate driving circuit 500 may be composed of one semiconductor IC or a plurality of semiconductor integrated circuits. In addition, a part or all of the controller 200, the panel controller 300, the data driving circuit 400, and the gate driving circuit 500 may be integrally configured as one semiconductor integrated circuit (or one body or a single body).

[0193] The display device 70 according to an embodiment of the present disclosure may be supplied with an image signal (e.g., RGB data or RGBW data), a driving signal, and a timing signal (vertical synchronization signal, horizontal synchronization signal, and data enable signal, etc.) from the host system 7, so that an image can be displayed and a sound can be generated at the same time. The display panel 600 may include an image display surface configured to display an image and a rear surface (or back surface) opposite to the image display surface. The vibration devices 11, 12, 13, and 14 may be connected to the rear surface of the display panel 600. Therefore, the display panel 600 may include the function of displaying an image and the function of the vibration member 90 of the first embodiment to the tenth embodiment of the present disclosure. In an embodiment of the present disclosure, a display device 70 having an acoustic effect that can generate (or output) sound from an image displayed on the display panel 600 may be provided. For example, the vibration of a plurality of vibration devices 11, 12, 13, and 14 may be transmitted to the rear surface of the display panel 600. For example, the display panel 600 vibrates based on the vibration transmitted by the plurality of vibration devices 11, 12, 13, and 14. Therefore, sound may be output (or generated) from the image displayed on the image display surface of the display panel 600 .

[0194] The sound-emitting device according to the embodiment of the present disclosure can be applied to the sound-emitting device set or included in a certain device. The device according to the embodiment of the present disclosure can be applied to mobile devices, video phones, smart watches, phone watches, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, bending devices, sliding devices, variable devices, electronic notepads, e-books, portable multimedia players (PMP), personal digital assistants (PDA), MP3 players, mobile medical devices, desktop personal computers (PC), laptop PCs, netbook computers, workstations, navigation devices, car navigation devices, car display devices, car devices, cinema equipment, cinema display devices, TV, wallpaper display devices, signage devices, gaming devices, laptops, monitors, cameras, video cameras, household appliances, etc. In addition, the sound-emitting device according to the embodiment of the present disclosure can be applied to organic light-emitting lighting devices or inorganic light-emitting lighting devices, or included in organic light-emitting lighting devices or inorganic light-emitting lighting devices. When the sound-emitting device of the embodiment of the present disclosure is applied to lighting devices or included in lighting devices, the lighting devices can play the role of lighting and speakers. Furthermore, when the sound emitting device of an embodiment of the present disclosure is applied to or included in a mobile device, etc., the sound emitting device may function as one or more of a speaker, a receiver, and a haptic device, but the embodiment of the present disclosure is not limited thereto.

[0195] A sound generating device according to an embodiment of the present disclosure will be described below.

[0196] A sound-emitting device according to one or more embodiments of the present disclosure may include: a vibration member having a plate shape; and a plurality of vibration devices arranged at a surface of the vibration member and vibrating based on a driving signal input thereto, each of the plurality of vibration devices may have a rectangular shape and may be rotationally symmetrically arranged, and a short side of one of the plurality of vibration devices may be opposite to a long side of another vibration device.

[0197] According to one or more embodiments of the present disclosure, a plurality of vibration devices may be driven by a common driving circuit.

[0198] According to one or more embodiments of the present disclosure, a plurality of vibration devices may be attached to the vibration member by an adhesive member.

[0199] According to one or more embodiments of the present disclosure, the sound generating apparatus may further include a mass member located at at least a portion of the plurality of vibration devices.

[0200] According to one or more embodiments of the present disclosure, the sound generating apparatus may include an elastic member between the mass member and the plurality of vibration devices.

[0201] According to one or more embodiments of the present disclosure, the mass member may have a circular shape and may be disposed above the plurality of vibration devices.

[0202] According to one or more embodiments of the present disclosure, the center of the mass member may coincide with or correspond to the center of rotational symmetry.

[0203] According to one or more embodiments of the present disclosure, a radius of the mass member may be shorter than a short side of the vibration device.

[0204] According to one or more embodiments of the present disclosure, a radius of the mass member may be longer than a short side of the vibration device, and may be shorter than a long side of the vibration device.

[0205] According to one or more embodiments of the present disclosure, the mass member may have a circular ring shape and may be disposed above the plurality of vibration devices, and the center of the mass member may coincide with or correspond to the rotational symmetry center.

[0206] According to one or more embodiments of the present disclosure, an inner circumference radius of the mass member may be longer than a short side of the vibration device.

[0207] According to one or more embodiments of the present disclosure, an outer circumference radius of the mass member may be shorter than a long side of the vibration device.

[0208] According to one or more embodiments of the present disclosure, the mass member may be provided close to a short side of a pair of short sides of the vibration device that is not opposite to the other vibration device.

[0209] According to one or more embodiments of the present disclosure, the plurality of vibration devices may include a first vibration device, a second vibration device, a third vibration device and a fourth vibration device, the short side of the first vibration device may be opposite to the long side of the second vibration device, the short side of the second vibration device may be opposite to the long side of the third vibration device, the short side of the third vibration device may be opposite to the long side of the fourth vibration device, and the short side of the fourth vibration device may be opposite to the long side of the first vibration device.

[0210] According to one or more embodiments of the present disclosure, the sound generating apparatus may further include a mass member located at at least a portion of the plurality of vibration devices.

[0211] According to one or more embodiments of the present disclosure, the sound generating apparatus may further include an elastic member between the mass member and the plurality of vibration devices.

[0212] According to one or more embodiments of the present disclosure, long axis directions of two adjacent vibration devices among the plurality of vibration devices may intersect with each other.

[0213] According to one or more embodiments of the present disclosure, a plurality of vibration devices may include a first vibration device, a second vibration device, and a third vibration device, the long side of the first vibration device may be located between the short side of the second vibration device and the short side of the third vibration device, the short side of the second vibration device may be opposite to the long side of one side of the first vibration device, and the short side of the third vibration device may be opposite to the long side of the other side of the first vibration device.

[0214] According to one or more embodiments of the present disclosure, a long-axis direction of the first vibration device may intersect with a long-axis direction of each of the second vibration device and the third vibration device.

[0215] According to one or more embodiments of the present disclosure, each of the plurality of vibration devices may be a piezoelectric device.

[0216] According to one or more embodiments of the present disclosure, the vibration component may include at least one material of metal, resin, glass, wood, rubber, plastic, fiber, cloth, paper, leather or carbon; and the vibration component may be a display panel including pixels configured to display an image, a screen panel onto which an image is projected from a display device, a lighting panel, an light-emitting diode lighting panel, an organic light-emitting lighting panel, an inorganic light-emitting lighting panel, a signage panel, a vehicle interior material, a vehicle glass window, a vehicle exterior material, a vehicle seat interior material, a vehicle ceiling material, a building ceiling material, a building interior material, a building glass window, an aircraft interior material, an aircraft glass window and at least one of a mirror.

[0217] According to one or more embodiments of the present disclosure, the vibration member may be a display panel of a display device, the display panel may include an image display surface for displaying an image and a rear surface opposite to the image display surface, and the vibrations of the plurality of vibration devices may be transmitted to the rear surface of the display panel.

[0218] According to one or more embodiments of the present disclosure, the display panel may vibrate based on vibration generated by one or more vibration devices among a plurality of vibration devices, and sound may be output from an image displayed on the display panel.

[0219] A sound-emitting device according to one or more embodiments of the present disclosure may include: a vibration member having a plate shape; and first to fourth vibration devices, which are arranged on the surface of the vibration member and vibrate based on a drive signal input thereto. Each of the first to fourth vibration devices may have a rectangular shape and be rotationally symmetrically arranged at a rotation angle of 90 degrees relative to a symmetry center point. The short side of one vibration device may be close to the long side of an adjacent vibration device.

[0220] According to one or more embodiments of the present disclosure, the first to fourth vibration devices may be attached to the vibration member by an adhesive member.

[0221] According to one or more embodiments of the present disclosure, the sound generating apparatus may further include a mass member provided at at least a portion of the first to fourth vibration devices.

[0222] It is obvious to those skilled in the art that various modifications and changes can be made in the present disclosure without departing from the scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and changes of the present disclosure that fall within the scope of the appended claims and their equivalents.

Claims

1. A sound-generating device, comprising: A vibrating member having a plate shape; as well as a plurality of vibration devices provided at a surface of the vibration member and vibrating based on a drive signal input thereto, wherein each of the plurality of vibration devices has a rectangular shape and is arranged rotationally symmetrically, and Wherein, a short side of one of the plurality of vibration devices is opposite to a long side of another vibration device.

2. The sound generating device according to claim 1, wherein: The plurality of vibration devices are driven by a common driving circuit.

3. The sound generating device according to claim 1, wherein: The plurality of vibration devices are attached to the vibration member by an adhesive member. 4 . The sound generating apparatus according to claim 1 , further comprising a mass member provided at at least a part of the plurality of vibration devices. 5 . The sound generating apparatus according to claim 4 , further comprising an elastic member between the mass member and the plurality of vibration devices.

6. The sound generating device according to claim 4, wherein: The mass member has a circular shape and is disposed above the plurality of vibration devices.

7. The sound generating device according to claim 6, wherein: The center of the mass member coincides with the center of rotational symmetry.

8. The sound generating device according to claim 7, wherein: The radius of the mass member is shorter than a short side of the vibration device.

9. The sound generating device according to claim 7, wherein: A radius of the mass member is longer than a short side of the vibration device and shorter than a long side of the vibration device.

10. The sound generating device according to claim 5, wherein: The mass member has a circular ring shape and is disposed above the plurality of vibration devices, and Wherein, the center of the mass component is consistent with the rotational symmetry center.

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