Sound equipment and sound systems

Abstract

To provide an acoustic device and an acoustic system that improve the deterioration of sound quality characteristics and sound pressure characteristics due to acoustic interference between a plurality of speakers.SOLUTION: An acoustic device includes a vibration member 110, and a vibrating device 130 having a housing 150 covering the back surface 110b of the vibrating member and one or more vibrating elements 131 for vibrating the vibrating member. The vibrating member can include a non-planar structure. By having a different natural vibration frequency for each region due to the non-planar structure, superimposition or interference of reflected waves in each frequency region is prevented or minimized, thereby improving acoustic characteristics by reducing standing waves in each frequency region.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This specification relates to audio devices and systems. [Background technology]

[0002] Recently, there has been an increasing demand for sound devices or sound bars that output sound through one or more speakers.

[0003] However, sound bars have the problem that sound quality characteristics and / or sound pressure characteristics are degraded due to acoustic interference between multiple speakers. Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, the inventors of the present specification have recognized the above problems and conducted several experiments to prevent or minimize acoustic interference between multiple speakers, and further conducted several experiments to realize an acoustic device that can output stereo sound by separating frequency ranges or channel sounds. Furthermore, they conducted several experiments to realize an acoustic device that can prevent or minimize degradation of acoustic characteristics due to reflected waves. Through several experiments, the inventors of the present specification have invented a new acoustic device and an acoustic system including the same that can prevent or minimize acoustic interference between multiple speakers, a new acoustic device and an acoustic system including the same that can output stereo sound by separating frequency ranges or channel sounds, and a new acoustic device and an acoustic system including the same that can prevent or minimize degradation of acoustic characteristics due to reflected waves.

[0005] An object of the present invention is to provide an acoustic device and an acoustic system including the same that can prevent or minimize deterioration of acoustic characteristics due to reflected waves.

[0006] An object of the present invention is to provide an audio device and an audio system including the same that can prevent or minimize acoustic interference between multiple speakers.

[0007] An object of the present invention is to provide a new audio device and an audio system including the same that can output stereo sound by separating sound ranges or channel sounds.

[0008] The problems to be solved by the embodiments of the present specification are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description. [Means for solving the problem]

[0009] According to some embodiments herein, an acoustic device may include a vibration device having a vibration member, a housing configured to cover a back surface of the vibration member, and one or more vibration elements configured to vibrate the vibration member, wherein the vibration member may include a non-planar structure.

[0010] According to some embodiments of the present specification, an acoustic device includes a housing having an accommodation space, a vibration member configured to cover the accommodation space of the housing and having 1st to nth regions (n is a natural number greater than or equal to 3), and a vibration device having one or more 1st to nth vibration elements configured to vibrate each of the 1st to nth regions of the vibration member, and the housing includes a space separation portion that separates the accommodation space into 1st to nth spaces corresponding to each of the 1st to nth regions.

[0011] According to some embodiments of the present specification, an audio system includes a display device that displays an image, one or more first speaker devices that are rotatably arranged around a first side of the display device and have an audio output device, and one or more second speaker devices that are rotatably arranged around a second side of the display device and have an audio output device, wherein the display device includes a display panel and a display driver circuit that displays different images on first and second regions of the display panel and provides a screen split mode signal to each of the one or more first speaker devices and the one or more second speaker devices, wherein the one or more first speaker devices can rotate the audio output device to a first listener located around the first region of the display panel in response to the screen split mode signal, and the one or more second speaker devices can rotate the audio output device to a second listener located around the second region of the display panel in response to the screen split mode signal.

[0012] Specific details relating to various examples of this specification other than the means for solving the problems mentioned above are included in the following description and drawings. [Effects of the Invention]

[0013] According to some embodiments of the present specification, it is possible to provide an acoustic device and an acoustic system including the same that can prevent or minimize deterioration of acoustic characteristics due to reflected waves.

[0014] According to some embodiments of the present specification, it is possible to provide an audio device and an audio system including the same that can prevent or minimize acoustic interference between multiple speakers.

[0015] According to some embodiments of the present specification, it is possible to provide a new audio device and an audio system including the same that can output stereo sound by separating sound ranges or channel sounds.

[0016] The above-mentioned problems to be solved, means for solving the problems, and effects do not specify essential features of the claims, and the scope of the claims is not limited by the matters described in the content of the invention. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view of an acoustic device according to an embodiment of the present disclosure; [Figure 2] 2 is a cross-sectional view taken along line AA' shown in FIG. [Figure 3] 3 is a plan view showing the arrangement structure of the vibration elements shown in FIG. 2. FIG. [Figure 4] 2 is another cross-sectional view taken along line AA' shown in FIG. 1. FIG. [Figure 5] 2 is another cross-sectional view taken along line AA' shown in FIG. 1. FIG. [Figure 6] 2 is another cross-sectional view taken along line AA' shown in FIG. 1. FIG. [Figure 7A] FIG. 10 is a plan view showing an acoustic device according to another embodiment of the present disclosure. [Figure 7B] FIG. 10 is another plan view illustrating an acoustic device according to another embodiment of the present disclosure. [Figure 7C] FIG. 10 is another plan view illustrating an acoustic device according to another embodiment of the present disclosure. [Figure 8] 2 is another cross-sectional view taken along the line AA' shown in FIG. 1. FIG. [Figure 9] 9 illustrates the vibrating member and a plurality of vibrating elements shown in FIG. 8. [Figure 10A] 2 is another cross-sectional view taken along the line AA' shown in FIG. 1. FIG. [Figure 10B] 2 is another cross-sectional view taken along the line AA' shown in FIG. 1. FIG. [Figure 11] FIG. 10 is a plan view showing an acoustic device according to another embodiment of the present disclosure. [Figure 12] FIG. 12 is a cross-sectional view taken along line BB' shown in FIG. [Figure 13] FIG. 13 is a perspective view of the housing shown in FIGS. 11 and 12. [Figure 14] FIG. 10 is a plan view showing an acoustic device according to another embodiment of the present disclosure. [Figure 15] 15 is a cross-sectional view taken along the line CC' shown in FIG. 14. [Figure 16] FIG. 10 is a conceptual diagram showing directional sound output from an acoustic device according to another embodiment of the present specification. [Figure 17] 1A and 1B are diagrams illustrating a vibration element according to an embodiment of the present specification. [Figure 18] FIG. 18 is a cross-sectional view taken along line DD' shown in FIG. [Figure 19] FIG. 19 is a perspective view showing the piezoelectric vibrating part shown in FIG. [Figure 20A] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 20B] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 20C] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 20D] FIG. 10 is a perspective view showing a piezoelectric vibrating portion according to another embodiment of the present specification. [Figure 21] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 22] FIG. 22 is a cross-sectional view taken along line EE' shown in FIG. 21. [Figure 23] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 24] FIG. 17 is a plan view showing a vibration element of the vibration device shown in FIGS. 14 to 16. [Figure 25] FIG. 25 is a cross-sectional view taken along line FF' shown in FIG. 24. [Figure 26] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 27] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 28] 28 is a cross-sectional view of the line GG' shown in FIG. 27. [Figure 29] 28 is a side view of the cross section taken along line HH' in FIG. 27. FIG. [Figure 30] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 31]FIG. 31 is a cross-sectional view taken along line II' in FIG. 30. [Figure 32] 10A and 10B are diagrams illustrating a vibration element according to another embodiment of the present specification. [Figure 33] FIG. 10 is a plan view showing an acoustic device according to another embodiment of the present disclosure. [Figure 34] FIG. 34 is a diagram showing the main cable and first to n-th signal cables shown in FIG. [Figure 35] 34 is a waveform diagram showing an output signal of the acoustic data generating circuit unit shown in FIG. 33. [Figure 36] FIG. 10 illustrates an acoustic device according to another embodiment of the present disclosure. [Figure 37] 1 illustrates an audio system according to one embodiment of the present disclosure. [Figure 38] 38 is a diagram showing a panel drive circuit and a speaker device of the display device shown in FIG. 37. FIG. [Figure 39] FIG. 1 is a conceptual diagram illustrating directional sound from an acoustic system according to an embodiment of the present specification. DETAILED DESCRIPTION OF THE INVENTION

[0018] The advantages and features of the present specification, and methods for achieving them, will become clearer with reference to the following detailed description of an embodiment accompanied by the accompanying drawings. However, the present specification is not limited to the embodiment disclosed below, and may be realized in various different forms. The embodiment is provided merely to complete the disclosure of the specification and to fully convey the scope of the invention to those skilled in the art to which the specification pertains. The specification is defined only by the scope of the claims.

[0019] In order to explain the embodiments of the present specification, the shapes, sizes, ratios, angles, numbers, etc. shown in the drawings are merely examples and the present specification is not limited to the details shown in the drawings. The same reference numerals refer to the same elements throughout the specification. Furthermore, in describing the present specification, if a detailed description of related prior art is deemed to unnecessarily obscure the gist of the present invention, such detailed description may be omitted. When terms such as "comprise," "have," and "consist of" are used in the present specification, other parts may be added unless "only" is used. When a component is expressed in the singular, the plural may also be included unless otherwise explicitly stated.

[0020] When interpreting elements, they are interpreted as including a range of error even if there is no other explicit description of the range of error.

[0021] When describing a positional relationship, for example when describing the positional relationship of two parts using "above," "on top," "below," or "beside," one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0022] When describing a temporal relationship, if the temporal sequence is described using terms such as "after," "following," "next," or "before," it can also include cases where the context is not consecutive, as long as terms such as "immediately" or "directly" are not used.

[0023] Although terms such as "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another. Therefore, a first component referred to below may also be a second component within the technical concept of the present invention.

[0024] In describing components in this specification, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are used to distinguish the component from other components, and do not limit the nature, order, sequence, or number of the components. When a component is described as being "coupled," "coupled," or "connected" to another component, it should be understood that the component can be directly coupled or connected to the other component, but unless otherwise explicitly stated, other components may also be "intervened" between components that can be indirectly coupled or connected.

[0025] The term "at least one" should be understood to include all combinations of one or more of the associated components. For example, the meaning of "at least one of the first, second, and third components" can include not only the first, second, or third component, but all combinations of two or more of the first, second, and third components.

[0026] The features of the various embodiments of this specification may be partially or fully combined or combined with each other, and various technical interlocking and driving mechanisms are possible, and each embodiment may be implemented independently of the others, or may be implemented together in a linked relationship.

[0027] The following detailed description of the present invention will be given with reference to the accompanying drawings and examples. The scales of the components shown in the drawings may differ from the actual scales for the sake of convenience, and are not limited to the scales shown in the drawings.

[0028] Fig. 1 is a perspective view showing an acoustic device according to an embodiment of the present specification. Fig. 2 is a cross-sectional view taken along line A-A' shown in Fig. 1. Fig. 3 is a plan view showing the arrangement of the vibration elements shown in Fig. 2.

[0029] 1-3, an acoustic device 10 according to one embodiment of the present disclosure may include a vibrating member 110 and a vibrating device 130.

[0030] The vibrating member 110 can output sound by vibration of the vibrating device 130. For example, the vibrating member 110 can be expressed by terms such as a vibrating object, a vibrating plate, a vibrating panel, an acoustic plate, an acoustic output member, or an acoustic output panel, and examples in this specification are not limited thereto. For example, the vibrating member 110 can be one or more of 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 signage panel, glass, or a mirror.

[0031] The vibrating member 110 may be transparent, translucent, or opaque. According to an embodiment of the present specification, the vibrating member 110 may include a metallic material having suitable material properties for outputting sound through vibration, or a non-metallic material (or a composite non-metallic material). The metallic material of the vibrating member 110 according to an embodiment of the present specification may include one or more of stainless steel, aluminum (Al), an aluminum (Al) alloy, magnesium (Mg), a magnesium (Mg) alloy, and a magnesium-lithium (Mg-Li) alloy, but the present specification is not limited thereto. The non-metallic material (or a composite non-metallic material) of the vibrating member 110 may include one or more of glass, plastic, fiber, leather, wood, cloth, and paper, but the present specification is not limited thereto.

[0032] The vibrating member 110 according to an embodiment of the present disclosure may realize a signage panel, such as an analog signage panel, such as an advertising billboard, a poster, or a guide board. For example, when the vibrating member 110 realizes a signage panel, the analog signage may include signage content, such as text, pictures, or symbols. The signage content may be visibly arranged on the vibrating member 110. For example, the signage content may be directly attached to one or more of the first surface (or front surface) 110a of the vibrating member 110 and the second surface (or rear surface) 110b, which is different from (or opposite to) the first surface 110a. For example, the signage content may be printed on a medium such as paper, and the medium on which the signage content is printed may be directly attached to one or more of the first surface 110a and the second surface 110b of the vibrating member 110. For example, when the signage content is attached to the second surface 110b of the vibrating member 110, the vibrating member 110 may be made of a transparent material.

[0033] The vibrating member 110 according to an embodiment of the present disclosure may include a plate-like structure having a rectangular shape. The vibrating member 110 may have a horizontal length parallel to a first direction (X) and a vertical length parallel to a second direction (Y) intersecting the first direction (X). For example, the vibrating member 110 may have a rectangular shape in which the horizontal length is relatively longer than the vertical length. However, an embodiment of the present disclosure is not limited thereto, and the vibrating member 110 may also have a square shape in which the horizontal length and the vertical length are equal.

[0034] The vibrating member 110 according to an embodiment of the present specification may be configured to have multiple natural frequencies. The vibrating member 110 may have multiple natural frequencies by including a non-planar structure. The vibrating member 110 may have multiple natural frequencies that differ from each other in different regions. For example, the vibrating member 110 may have multiple natural frequencies that differ depending on the thickness of each region.

[0035] A vibration member 110 according to one embodiment of the present disclosure includes a first surface 110a and a second surface 110b, where one or more of the first surface 110a and the second surface 110b can include a non-planar structure.

[0036] According to one embodiment of the present specification, the first surface 110a of the vibration member 110 may include a non-planar structure, and the second surface 110b may include a planar structure. For example, the first surface 110a of the vibration member 110 may include an inclined surface. For example, the first surface 110a of the vibration member 110 may be inclined with respect to the second surface 110b. According to other embodiments of the present specification, the first surface 110a of the vibration member 110 may include a planar structure, and the second surface 110b may include a non-planar structure. For example, the second surface 110b of the vibration member 110 may include an inclined surface. For example, the second surface 110b of the vibration member 110 may include an inclined surface that is inclined with respect to the first surface 110a.

[0037] According to one embodiment of the present disclosure, the thickness (T1) of the first edge portion (E1) of the vibration member 110 may be different from the thickness (T2) of the second edge portion (E2) parallel to or opposite the first edge portion (E1). For example, the thickness (T1) of the first edge portion (E1) may be greater than the thickness (T2) of the second edge portion (E2). For example, the thickness (T1) of the vibration member 110 may gradually decrease from the first edge portion (E1) to the second edge portion (E2). For example, the first edge portion (E1) of the vibration member 110 may be a first tip, one side, one end, or first short side, and the second edge portion (E2) may be a second tip, other side, other end, or second short side.

[0038] The vibration device 130 may be configured to vibrate (or displace) itself in response to an applied electric signal (or voice signal), or may be configured to vibrate (or displace) the vibrating member (or diaphragm, or vibrating object) 110. For example, the vibration device 130 may be expressed by terms such as a vibrating structure, a vibrator, a vibration generating device, a vibration generating element, a vibration generator, a sounder, an acoustic element, an acoustic generating element, or an acoustic generator, and examples of the present specification are not limited to these.

[0039] The vibration device 130 according to one embodiment of the present disclosure may include a piezoelectric material (or electroactive material) having piezoelectric properties. The vibration device 130 can vibrate (or displace) the vibrating member 110 by vibrating (or displacing) the piezoelectric material due to an electric signal (or voice signal) applied to the piezoelectric material. For example, the vibration device 130 can vibrate (or displace) by alternately contracting and expanding due to the piezoelectric effect (or piezoelectric properties). For example, the vibration device 130 can vibrate (or displace) in the vertical direction (or thickness direction) (Z) by alternately contracting and expanding due to the inverse piezoelectric effect.

[0040] The vibration device 130 according to one embodiment of the present disclosure may include one or more vibration elements 131 having a piezoelectric principle.

[0041] One or more vibration elements 131 according to an embodiment of the present disclosure may be configured to be flexible. For example, one or more vibration elements 131 may be configured to bend into a non-planar shape, including a curved surface. For example, one or more vibration elements 131 according to an embodiment of the present disclosure may be expressed by terms such as a flexible vibrating structure, a flexible vibrator, a flexible vibration generating element, a flexible vibration generator, a flexible sounder, a flexible acoustic element, a flexible sound generating element, a flexible sound generator, a flexible actuator, a flexible exciter, or a flexible transducer, and embodiments of the present disclosure are not limited thereto.

[0042] According to one embodiment of the present specification, one or more vibration elements 131 may include a rectangular shape having a first length parallel to a first direction (X) and a second length parallel to a second direction (Y) intersecting the first direction (X). For example, one or more vibration elements 131 may include a square shape in which the first length and the second length are equal. However, embodiments of the present specification are not limited thereto, and one or more vibration elements 131 may include a rectangular shape, a non-square shape, a circular shape, or an elliptical shape in which any one of the first length and the second length is larger.

[0043] The vibration device 130 according to an embodiment of the present disclosure may be coupled or connected to the second surface 110 b of the vibration member 110 via an adhesive member 120 .

[0044] The adhesive member 120 may be disposed between the vibration member 110 and the vibration device 130. For example, the adhesive member 120 may be disposed between the vibration member 110 and one or more vibration elements 131. For example, the adhesive member 120 couples or connects the one or more vibration elements 131 to the second surface 110b of the vibration member 110.

[0045] The adhesive member 120 according to an embodiment of the present disclosure may include an adhesive layer (or a sticky layer) having excellent adhesion or bonding strength. For example, the adhesive member 120 may include a double-sided adhesive tape, a double-sided adhesive foam pad, or a sticky sheet. For example, when the adhesive member 120 includes a sticky sheet (or a sticky layer), the adhesive member 120 may include only the adhesive layer or sticky layer without a base member such as a plastic material.

[0046] The adhesive layer (or adhesive layer) of the adhesive member 120 according to one embodiment of the present specification may include epoxy, acrylic, silicone, or urethane, and the embodiment of the present specification is not limited thereto.

[0047] The adhesive layer (or adhesive layer) of the adhesive member 120 according to other embodiments of the present specification may include a PSA (pressure sensitive adhesive), an OCA (optically clear adhesive), or an OCR (optically clear resin), and the embodiments of the present specification are not limited thereto.

[0048] The acoustic device 10 according to an embodiment of the present disclosure may further include a housing 150 and a connecting member 140 .

[0049] The housing 150 may be disposed on the rear surface of the vibrating member 110 to cover the second surface 110b of the vibrating member 110 and one or more vibrating elements 131. The housing 150 has an accommodation space 150s for accommodating the vibrating device 130 and may have a box shape with one side open.

[0050] According to an embodiment of the present specification, the housing 150 may include one or more of a metal material or a non-metal material (or a composite non-metal material), but the embodiment of the present specification is not limited thereto. For example, the housing 150 may include one or more of a metal material, a plastic, and a wood, but the embodiment of the present specification is not limited thereto. For example, the housing 150 may be expressed by terms such as a case, an outer case, a case member, a housing member, a cabinet, an enclosure, a sealing member, a sealing cap, a sealed box, or a sound box, but the embodiment of the present specification is not limited thereto. For example, the accommodation space 150s of the housing 150 may be expressed by terms such as a gap space, an air gap, a vibration space, an acoustic space, a sound box, or a sealed space, but the embodiment of the present specification is not limited thereto.

[0051] The housing 150 according to an embodiment of the present specification can maintain a constant impedance component due to the air acting on the vibrating member 110 when the vibrating member 110 vibrates. For example, the air surrounding the vibrating member 110 resists the vibration of the vibrating member 110 and acts as an impedance component having different resistance and reactance components depending on the frequency. As a result, the housing 150 forms an enclosed space surrounding the vibrating device 130, thereby maintaining a constant impedance component (or air impedance or elastic impedance) acting on the vibrating member 110 due to the air. This can improve the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibrating member 110 and improve the sound quality of the high frequency range.

[0052] The housing 150 according to one embodiment of the present disclosure may include a bottom 151 and sides 152 .

[0053] The bottom 151 may be disposed on the back surface of the vibrating member 110 so as to cover the second surface 110b of the vibrating member 110 and the vibrating device 130. For example, the bottom 151 may be disposed so as to be spaced apart from the second surface 110b of the vibrating member 110 and the vibrating device 130. For example, the bottom 151 may be expressed by terms such as a housing plate or a housing bottom, and the embodiments of the present specification are not limited thereto.

[0054] The side portion 152 may be connected to an edge portion of the bottom portion 151. For example, the side portion 152 may be bent from the edge portion of the bottom portion 151 along a third direction (Z) parallel to the thickness direction of the vibration member 110. For example, the side portion 152 may be parallel to the third direction (Z) or inclined from the third direction (Z). For example, the side portion 152 may include first to fourth side portions. For example, the side portion 152 may be expressed by terms such as a housing side surface or a housing side wall, and the embodiments of the present specification are not limited thereto.

[0055] The side portion 152 may be integrated with the bottom portion 151. For example, the bottom portion 151 and the side portion 152 may be integrated into one body, thereby providing an accommodation space 150s surrounded by the side portion 152 on the bottom portion 151. Therefore, the bottom portion 151 and the side portion 152 may have a box shape with one side open.

[0056] The side portion 152 may be connected or coupled to the second surface 110b of the vibration member 110 via the coupling member 140. For example, the side portion 152 may be connected or coupled to an edge portion of the second surface 110b of the vibration member 110 via the coupling member 140.

[0057] The housing 150 according to an embodiment of the present disclosure may further include a pattern portion 150p.

[0058] The pattern portion 150p can be formed on the bottom surface of the bottom portion 151 to increase the rigidity of the housing 150. For example, the pattern portion 150p can include a concave-convex structure formed on the bottom surface of the bottom portion 151. For example, the pattern portion 150p can be expressed by terms such as a concave-convex pattern portion, a bottom pattern portion, or a reinforcing pattern portion, and examples of the present specification are not limited thereto.

[0059] The pattern portion 150p according to an embodiment of the present specification may include a plurality of groove lines. Each of the plurality of groove lines may be recessed from the upper surface (or surface) of the bottom portion 151 at a predetermined interval along one or more of a first direction (X), a second direction (Y), and a diagonal direction between the first direction (X) and the second direction (Y). For example, the pattern portion 150p may include a lattice pattern formed by the intersection of a plurality of groove lines parallel to the first direction (X) and a plurality of groove lines parallel to the second direction (Y), although the embodiment of the present specification is not limited thereto.

[0060] The housing 150 according to an embodiment of the present disclosure may further include a connecting frame portion 153 .

[0061] The connecting frame portion 153 may be connected to the side portion 152. For example, the connecting frame portion 153 may be disposed parallel to the bottom portion 151 and connected to the side portion 152. The connecting frame portion 153 may be bent parallel to the first direction (X) from the tip of the side portion 152 and extend to have a certain length along the first direction (X). The connecting frame portion 153 may include an opening corresponding to the receiving space 150s provided on the bottom portion 151 by the side portion 152. The side portion 152 may be connected vertically or at an angle between the bottom portion 151 and the connecting frame portion 153. The bottom portion 151, the side portion 152, and the connecting frame portion 153 may be integrated into a single body, so that the bottom portion 151, the side portion 152, and the connecting frame portion 153 may have a box shape with one side open. For example, the connecting frame portion 153 may be expressed by terms such as a housing connecting portion, a housing eaves portion, a housing skirt portion, etc., and the examples of this specification are not limited thereto.

[0062] According to one embodiment of the present specification, when the housing 150 includes the connecting frame portion 153, the connecting member 140 may be disposed between the connecting frame portion 153 of the housing 150 and the second surface 110b of the vibration member 110. For example, the connecting member 140 may connect or join the edge portion of the second surface 110b of the vibration member 110 and the connecting frame portion 153.

[0063] According to an embodiment of the present disclosure, the connecting member 140 disposed between the housing 150 and the vibrating member 110 may be configured to minimize or prevent vibrations of the vibrating member 110 from being transmitted to the housing 150. The connecting member 140 may include material properties suitable for isolating vibrations. For example, the connecting member 140 may include an elastic material. For example, the connecting member 140 may include an elastic material for vibration absorption (or shock absorption). The connecting member 140 according to an embodiment of the present disclosure may be made of a polyurethane material or a polyolefin material, but the embodiment of the present disclosure is not limited thereto. The connecting member 140 according to an embodiment of the present disclosure may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, and a double-sided cushion tape, but the embodiment of the present disclosure is not limited thereto.

[0064] The connecting member 140 according to an embodiment of the present specification may have a thickness that can minimize or prevent vibrations of the vibrating member 110 from being transmitted to the housing 150. For example, the connecting member 140 may have a thickness greater than that of the vibrating member 110. The connecting member 140 can minimize or prevent vibrations of the vibrating member 110 from being transmitted to the housing 150 by absorbing the vibrations of the vibrating member 110 through its thickness and elasticity. The connecting member 140 also prevents physical contact (or friction) between the vibrating member 110 and the housing 150, thereby preventing noise (or noises) caused by physical contact (or friction) between the vibrating member 110 and the housing 150. For example, the connecting member 140 may be expressed by terms such as a buffer member, an elastic member, a damping member, a vibration absorbing member, or a vibration isolating member, although the embodiments of the present specification are not limited thereto.

[0065] One or more vibration elements 131 according to an embodiment of the present specification can vibrate in response to a vibration drive signal (or an audio signal or a voice signal) provided from an audio processing circuit, causing the vibrating member 110 to vibrate and generate or output sound. The sound generated by the vibration of the vibrating member 110 can have increased sound pressure characteristics and an expanded range of sound reproduction due to vibrations having various natural frequencies of the vibrating member 110. For example, when the vibrating member 110 having a non-planar structure vibrates, high-frequency sound can be generated or output in a relatively thick region, and low-frequency sound can be generated or output in a relatively thin region.

[0066] According to an embodiment of the present specification, one or more vibration elements 131 may be coupled to or connected to a non-center portion other than the center portion (CP) of the vibration member 110. For example, the center portion (CP) of one or more vibration elements 131 may be located between the center portion (CP) and the edge portions (E1, E2) of the vibration member 110.

[0067] According to one embodiment of the present disclosure, sound waves (or acoustic vibrations) generated by the vibration of the vibrating member 110 due to the vibration of one or more vibrating elements 131 may propagate radially from the vibrating device 130. These sound waves may be called progressive waves. These progressive waves are reflected by the connecting member 140 to form reflected waves that propagate in the opposite direction to the progressive waves. These reflected waves may overlap and interfere with the progressive waves, forming standing waves in which the overlapped sound waves cannot propagate and remain stationary. These standing waves may reduce sound pressure and degrade acoustic characteristics. To reduce these standing waves, one or more vibrating elements 131 according to one embodiment of the present disclosure may be connected or coupled to a non-center portion of the vibrating member 110, excluding the center portion (CP) thereof. Therefore, since the vibration element 131 is connected to the non-center portion of the vibration member 110 except for the center portion (CP), and the vibration member 110 has a non-planar structure and has different natural vibration frequencies in each region, overlapping or interference of reflected waves in each frequency region can be prevented or minimized, thereby improving acoustic characteristics by reducing standing waves in each frequency region.

[0068] According to one embodiment of the present specification, one or more vibration elements 131 may be disposed between the center (CP) and the first edge portion (E1) of the vibrating member 110. For example, one or more vibration elements 131 may be coupled to a relatively thick region at a non-center portion of the vibrating member 110, thereby allowing the sound generated by the vibration of the vibrating member 110 to have high sound pressure characteristics in the high frequency band. For example, an acoustic device 10 including one or more vibration elements 131 disposed between the center (CP) and the first edge portion (E1) of the vibrating member 110 may mitigate the effects of split vibration of the vibrating member 110, thereby improving the acoustic characteristics and / or sound pressure characteristics in the high frequency band.

[0069] According to other embodiments of the present specification, one or more vibration elements 131 may also be disposed between the center (CP) and the second edge portion (E2) of the vibrating member 110. For example, one or more vibration elements 131 may be coupled to a relatively thin region in a non-center portion of the vibrating member 110, thereby allowing the sound generated by the vibration of the vibrating member 110 to have high sound pressure characteristics in the low frequency band. For example, an acoustic device 10 including one or more vibration elements 131 disposed between the center (CP) and the second edge portion (E2) of the vibrating member 110 may mitigate the influence of the split vibration of the vibrating member 110, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low frequency band.

[0070] The connecting member 140 according to other embodiments of the present specification may be configured to minimize or prevent the vibration of the vibrating member 110 from being transmitted to the housing 150 and to reduce the reflection of incident sound waves generated by the vibration of the vibrating member 110.

[0071] A connecting member 140 according to another embodiment of the present disclosure may include a first connecting member 140a and a second connecting member 140b.

[0072] The first connecting member 140a may be disposed between the vibrating member 110 and the housing 150 so as to be surrounded by the second connecting member 140b. For example, the first connecting member 140a may be disposed inside (or at the center of) the second connecting member 140b. The first connecting member 140a may be configured to have a lower hardness than the second connecting member 140b. For example, the first connecting member 140a may include double-sided polyurethane tape, double-sided polyurethane foam tape, double-sided sponge tape, or the like, and examples of the present specification are not limited thereto.

[0073] The second connecting member 140b may be disposed between the vibrating member 110 and the housing 150 so as to surround the first connecting member 140a. For example, the second connecting member 140b may be disposed on the outside (or front side) of the first connecting member 140a. The second connecting member 140b may be configured to have a higher hardness than the first connecting member 140a. For example, the second connecting member 140b may include a double-sided polyolefin tape, a double-sided polyolefin foam tape, a double-sided acrylic tape, a double-sided acrylic foam tape, or the like, and examples of the present specification are not limited thereto.

[0074] The connecting member 140 according to another embodiment of the present specification can absorb incident sound waves generated by the vibration of the vibrating member 110 by using the relatively soft first connecting member 140a disposed inside the relatively hard second connecting member 140b, thereby minimizing the reflected sound (or reflected waves) generated by the connecting member 140. This can reduce the maximum and minimum sound pressures generated in the reproduction frequency band of the sound generated by the vibration of the vibrating device 130, thereby reducing the flatness of the sound pressure.

[0075] In the connecting member 140 according to another embodiment of the present specification, the relatively hard second connecting member 140b may be disposed inside the relatively soft first connecting member 140a. This allows for a reduction in sound pressure in a specific frequency band of the sound. For example, the sound pressure may be reduced in the frequency bands of 2 kHz to 5 kHz and 7 kHz to 12 kHz due to the reflected sound (or reflected wave) generated by the relatively hard second connecting member 140b. Therefore, if a reduction in sound pressure in the frequency bands of 2 kHz to 5 kHz and 7 kHz to 12 kHz is required depending on the shape and size of the vibrating member 110, the relatively hard second connecting member 140b may be disposed inside the relatively soft first connecting member 140a. This reduction in sound pressure in the frequency bands of 2 kHz to 5 kHz and 7 kHz to 12 kHz generated by the second connecting member 140b may improve the flatness of the sound pressure.

[0076] Additionally, the acoustic device 10 according to one embodiment of the present disclosure may further include a sound absorbing member 155 disposed between the housing 150 and the vibration device 130 .

[0077] The sound absorbing member 155 can be arranged in the accommodation space 150 s of the housing 150 so as to cover the rear surface of the vibration device 130 .

[0078] The sound absorbing member 155 according to an embodiment of the present specification may be disposed on or attached to the bottom 151 of the housing 150. For example, the sound absorbing member 155 may be disposed on or attached to the bottom surface of the bottom 151 of the housing 150. For example, the sound absorbing member 155 may be disposed so as to cover the pattern portion 150p formed on the bottom 151 of the housing 150. For example, the sound absorbing member 155 may include a nonwoven fabric or a foam pad, and the embodiment of the present specification is not limited thereto.

[0079] The sound absorbing member 155 according to an embodiment of the present specification can improve sound quality by minimizing the booming phenomenon caused by interference between frequencies in the low frequency range by attenuating low frequency resonance occurring in the space between the vibrating member 110 and the housing 150 or in the receiving space 150s of the housing 150. In addition, the sound absorbing member 155 can prevent direct contact between the vibrating device 130 and the bottom 151 of the housing 150 when the vibrating member 110 vibrates, thereby preventing damage or breakage of the vibrating device 130.

[0080] Fig. 4 is another cross-sectional view taken along line A-A' in Fig. 1. Fig. 4 is a diagram showing an acoustic device according to another embodiment of the present invention. Fig. 4 shows a modified version of the structure of the vibrating member shown in Fig. 2. Therefore, in the following description, redundant descriptions of the remaining components other than the vibrating member and its related components can be omitted.

[0081] 1 and 4, a vibration member 110 according to another embodiment of the present invention includes a first surface 110a and a second surface 110b, and one or more of the first surface 110a and the second surface 110b may include a non-planar structure. For example, the first surface 110a of the vibration member 110 may include a non-planar structure, and the second surface 110b of the vibration member 110 may include a planar structure.

[0082] The first surface 110a of the vibration member 110 according to other embodiments of the present disclosure may include a curved surface structure including one or more protrusions 110a1.

[0083] The first surface 110a of the vibration member 110 may include a convex portion 110a1, a first curved surface portion 110c1 between the convex portion 110a1 and the first edge portion (E1), and a second curved surface portion 110c2 between the convex portion 110a1 and the second edge portion (E2).

[0084] The convex portion 110a1 may be configured between the center (CP) and the first edge portion (E1) of the vibration member 110, and the embodiments of the present specification are not limited thereto, and may be configured between the center (CP) and the second edge portion (E2) of the vibration member 110.

[0085] The first curved surface portion 110c1 and the second curved surface portion 110c2 may be configured to have different curvatures (or radii of curvature) from each other. For example, each of the first curved surface portion 110c1 and the second curved surface portion 110c2 may be configured to have one or more curvatures (or radii of curvature).

[0086] The vibration member 110 may have the greatest thickness (T3) at the protrusion 110a1 and the thinnest thickness (T4) at the first edge portion (E1) or the second edge portion (E2). For example, the vibration member 110 may have the thinnest thickness (T4) at the second edge portion (E2).

[0087] The vibrating member 110 according to another embodiment of the present specification may have a plurality of natural frequencies due to a curved surface structure including the convex portion 110a1 formed on the first surface 110a. The vibrating member 110 may have a plurality of natural frequencies that differ from one another in different regions. For example, the vibrating member 110 may have a plurality of natural frequencies that differ from one another depending on the thickness of each region.

[0088] The vibration device 130 according to other embodiments of the present disclosure may include one or more vibration elements 131 for vibrating the convex portion 110 a 1 of the vibration member 110 .

[0089] One or more vibration elements 131 may be coupled or connected to the second surface 110b of the vibration member 110 corresponding to the protrusion 110a1 of the vibration member 110.

[0090] One or more vibration elements 131 can vibrate the vibrating member 110 in an area corresponding to the convex portion 110a1, thereby generating or outputting sound due to the vibration of the vibrating member 110. The sound generated by the vibration of the vibrating member 110 can have increased sound pressure characteristics and an expanded range of sound reproduction due to vibrations having various natural frequencies of the vibrating member 110. For example, when the vibrating member 110 having a non-planar structure vibrates, high-frequency sound can be generated or output in a relatively thick area, and low-frequency sound can be generated or output in a relatively thin area.

[0091] According to an embodiment of the present disclosure, one or more vibration elements 131 may be connected or coupled to a non-center portion of the vibrating member 110 other than the center (CP) so as to correspond to the convex portion 110a1 of the vibrating member 110. For example, the center portion of one or more vibration elements 131 may be located or aligned with the apex of the convex portion 110a1 of the vibrating member 110. As a result, when one or more vibration elements 131 vibrate, overlapping and interference of reflected waves in different frequency ranges generated in the vibrating member 110 may be prevented or minimized, thereby improving acoustic characteristics by reducing standing waves in different frequency ranges.

[0092] According to one embodiment of the present specification, one or more vibration elements 131 may be disposed between the center (CP) and the first edge portion (E1) of the vibrating member 110. For example, one or more vibration elements 131 may be coupled to a relatively thick region at a non-center portion of the vibrating member 110, thereby allowing the sound generated by vibration of the vibrating member 110 to have high sound pressure characteristics in the high frequency band. For example, an acoustic device 10 including one or more vibration elements 131 disposed between the center (CP) and the first edge portion (E1) of the vibrating member 110 may have improved acoustic characteristics and / or sound pressure characteristics in the high frequency band.

[0093] According to other embodiments of the present specification, one or more vibration elements 131 may be disposed between the center (CP) and the second edge portion (E2) of the vibrating member 110. For example, one or more vibration elements 131 may be coupled to a relatively thin region in a non-center portion of the vibrating member 110, thereby allowing the sound generated by vibration of the vibrating member 110 to have high sound pressure characteristics in the low frequency band. For example, an acoustic device 10 including one or more vibration elements 131 disposed between the center (CP) and the second edge portion (E2) of the vibrating member 110 may have improved acoustic characteristics and / or sound pressure characteristics in the low frequency band.

[0094] Fig. 5 is another cross-sectional view taken along line A-A' in Fig. 1. It shows an acoustic device according to another embodiment of the present invention. Fig. 5 shows a modification of the structure of the vibrating member shown in Fig. 2. Therefore, in the following description, redundant descriptions of the remaining components other than the vibrating member and its related components can be omitted.

[0095] 1 and 5, an acoustic device 10 according to another embodiment of the present invention may include a vibrating member 110 and a vibrating device 130.

[0096] The vibration member 110 includes a first surface 110a and a second surface 110b, and one or more of the first surface 110a and the second surface 110b can include a non-planar structure. For example, the first surface 110a of the vibration member 110 can include a non-planar structure, and the second surface 110b of the vibration member 110 can include a planar structure.

[0097] The first surface 110a of the vibration member 110 according to other embodiments of the present disclosure may include a curved surface structure including a plurality of protrusions 110a1, 110a2 and recesses 110c between the plurality of protrusions 110a1, 110a2.

[0098] The first surface 110a of the vibration member 110 according to other embodiments of the present disclosure may include a first convex portion 110a1, a second convex portion 110a2, and a concave portion 110c between the first convex portion 110a1 and the second convex portion 110a2.

[0099] The first convex portion 110a1 may be configured between the center portion (CP) and the first edge portion (E1) of the vibration member 110. For example, the first convex portion 110a1 may be configured biased toward the first edge portion (E1).

[0100] The second protrusion 110a2 may be configured between the center (CP) and the second edge portion (E2) of the vibration member 110. For example, the second protrusion 110a2 may be configured biased toward the second edge portion (E2).

[0101] The first convex portion 110a1 and the second convex portion 110a2 may have an asymmetric structure (or a bilaterally asymmetric structure) with respect to a midline (ML) of the vibration member 100 parallel to the first direction (X) (or a reference line passing through the center of the vibration member 110 along the second direction (Y)). However, the embodiments of the present specification are not limited thereto, and the first convex portion 110a1 and the second convex portion 110a2 may have a symmetric structure (or a bilaterally symmetric structure) with respect to the midline (ML) of the vibration member 100.

[0102] The recess 110c may be formed between the first protrusion 110a1 and the second protrusion 110a2. The recess 110c may be formed between the first protrusion 110a1 and the second protrusion 110a2, including the center (CP) of the vibration member 110. The recess 110c may have an asymmetrical or symmetrical structure with respect to the midline (ML) of the vibration member 110.

[0103] The vibration member 110 may have a maximum thickness (T5) at at least one of the first convex portion 110a1 and the second convex portion 110a2 and a minimum thickness (T4) at the concave portion 110c. For example, the vibration member 110 may have a maximum thickness (T5) at the first convex portion 110a1.

[0104] The vibrating member 110 according to another embodiment of the present specification may have multiple natural frequencies due to the curved surface structures of the first convex portion 110a1, the second convex portion 110a2, and the concave portion 110c formed on the first surface 110a. The vibrating member 110 may have multiple natural frequencies that differ from one another in different regions. For example, the vibrating member 110 may have multiple natural frequencies that differ from one another depending on the thickness of each region.

[0105] A vibration device 130 according to another embodiment of the present specification may include a plurality of vibration elements 131 for vibrating each of the plurality of protrusions 110a1, 110a2 of the vibration member 110.

[0106] Each of the plurality of vibration elements 131 may be connected or coupled to a second surface 110b of the vibration member 110 corresponding to each of the plurality of protrusions 110a1, 110a2 formed on the vibration member 110. For example, each of the plurality of vibration elements 131 may be connected or coupled to a second surface 110b of the vibration member 110 corresponding to each of the first protrusion 110a1 and the second protrusion 110a2.

[0107] Each of the plurality of vibration elements 131 vibrates the vibrating member 110 in an area corresponding to the corresponding convex portion 110a1, 110a2, thereby generating or outputting sound due to the vibration of the vibrating member 110. The sound generated by the vibration of the vibrating member 110 can have increased sound pressure characteristics and an expanded range of sound reproduction due to vibrations having various natural frequencies of the vibrating member 110. For example, when the vibrating member 110 having a non-planar structure vibrates, high-frequency sound can be generated or output in a relatively thick area, and low-frequency sound can be generated or output in a relatively thin area.

[0108] Therefore, the acoustic device 10 according to another embodiment of this specification includes a plurality of vibration elements 131 arranged to correspond to each of the plurality of protrusions 110a1, 110a2 of the vibration member 110, thereby mitigating the effects of the divided vibrations of the vibration member 110 and improving the acoustic characteristics and / or sound pressure characteristics in the high frequency range.

[0109] Fig. 6 is another cross-sectional view taken along line A-A' in Fig. 1. It shows an acoustic device according to another embodiment of the present invention. Fig. 6 shows a modification of the structure of the vibrating member shown in Fig. 2. Therefore, in the following description, redundant descriptions of the remaining components other than the vibrating member and its related components can be omitted.

[0110] 1 and 6, an acoustic device 10 according to another embodiment of the present invention may include a vibrating member 110 and a vibrating device 130.

[0111] The vibration member 110 may include a non-planar structure. For example, the vibration member 110 may include a curved structure or a bent portion. For example, the vibration member 110 may include a bent portion having one or more convex curved portions 110a3 and one or more concave curved portions 110a4. For example, the vibration member 110 may have the same overall thickness (T7), although examples herein are not limited thereto.

[0112] The convex curved surface portion 110a3 may be a region of the vibration member 110 that is curved in a convex curved shape. The concave curved surface portion 110a4 may be a region of the vibration member 110 that is curved in a concave curved shape.

[0113] Convex curved surface portion 110a3 and concave curved surface portion 110a4 may have the same curvature (or radius of curvature), but examples herein are not limited thereto. For example, convex curved surface portion 110a3 may have a larger or smaller curvature than concave curved surface portion 110a4.

[0114] The boundary (or inflection) between the convex curved surface portion 110a3 and the concave curved surface portion 110a4 may be located or aligned with the midline (ML) of the vibration member 110 parallel to the first direction (X), but the embodiments of this specification are not limited thereto.

[0115] The vibrating member 110 according to another embodiment of the present specification may have a plurality of natural frequencies due to a curved surface structure including the convex curved surface portion 110a3 and the concave curved surface portion 110a4. The vibrating member 110 may have a plurality of natural frequencies that differ from each other depending on the curvature of the convex curved surface portion 110a3 and the concave curved surface portion 110a4. For example, the vibrating member 110 may have a plurality of natural frequencies that differ from each other depending on the curvature of the convex curved surface portion 110a3 and the concave curved surface portion 110a4.

[0116] A vibration device 130 according to another embodiment of the present specification may include a plurality of vibration elements 131 for vibrating each of the convex curved surface portion 110a3 and the concave curved surface portion 110a4 of the vibration member 110.

[0117] Each of the plurality of vibration elements 131 may be coupled or connected to the vibration member 110 corresponding to each of the convex curved surface portion 110a3 and the concave curved surface portion 110a4 of the vibration member 110. For example, each of the plurality of vibration elements 131 may be coupled or connected to the second surface 110b of the vibration member 110 corresponding to each of the convex curved surface portion 110a3 and the concave curved surface portion 110a4.

[0118] Each of the plurality of vibration elements 131 can be bent according to the curvature of the corresponding convex curved surface portion 110a3 and concave curved surface portion 110a4, and can be connected or coupled to the second surface 110b of the vibration member 110. For example, each of the plurality of vibration elements 131 can be bent into a shape that follows the shape of the second surface 110b of the vibration member 110.

[0119] According to one embodiment of the present specification, when the vibration element 131 is connected to the concave second surface 110b of the vibration member 110 corresponding to the convex curved surface portion 110a3, the local divided vibration area generated in the vibration member 110 can be changed in the curvature direction (or the concave second surface), thereby preventing or minimizing degradation of sound quality due to the local divided vibration. When the vibration element 131 is connected to the convex second surface 110b of the vibration member 110 corresponding to the concave curved surface portion 110a4, bending stress is applied to the vibration device 130 due to the curvature of the vibration member 110, and the bending (or bending) direction of the vibration element 131 can be concentrated in one direction, thereby increasing sound pressure compared to a vibration member with a flat structure.

[0120] Each of the plurality of vibration elements 131 can generate or output sound by vibrating the vibration member 110 at the corresponding convex curved surface portion 110a3 and concave curved surface portion 110a4, respectively.

[0121] Therefore, the acoustic device 10 according to one embodiment of the present specification includes a plurality of vibration elements 131 arranged to correspond to the convex curved surface portion 110a3 and the concave curved surface portion 110a4 of the vibrating member 110, thereby mitigating the effects of the divided vibration of the vibrating member 110 and improving the acoustic characteristics and / or sound pressure characteristics due to the increase in sound pressure at the convex curved surface portion 110a3 of the vibrating member 110.

[0122] Figures 7A to 7C are plan views showing acoustic devices according to other embodiments of the present specification. Figures 7A to 7C show modifications to the shape of the vibrating member shown in Figures 1 to 6. Therefore, in the description of Figures 7A to 7C, redundant descriptions of the remaining configurations, excluding the shape of the vibrating member and related configurations, may be omitted or simplified. The line A-A' shown in Figures 7A to 7C is shown in either Figure 2 or Figures 4 to 6.

[0123] 7A to 7C, acoustic devices 10 according to other embodiments of the present specification may include a triangular, pentagonal, or tetragonal shape, but the embodiments of the present specification are not limited thereto. For example, acoustic devices 10 according to other embodiments of the present specification may include a circular shape, an elliptical shape, or a polygonal shape having three or more vertices (AP). For example, in acoustic devices 10 according to other embodiments of the present specification, the vibrating member 110 and the housing 150 may each include the same circular shape, elliptical shape, or polygonal shape having three or more vertices (AP).

[0124] Referring to FIG. 7A, in an acoustic device 10 according to another embodiment of the present disclosure, the vibrating member 110 may include a triangular shape.

[0125] The vibrating member 110 may have the same cross-sectional structure as the vibrating member shown in any one of Figures 2, 4 to 6. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure having a certain thickness, for example, a triangular flat plate structure.

[0126] The vibration member 110 can include a first surface, a second surface, three vertices (or corners) (AP), and three sides (or sidewalls).

[0127] The vibrating member 110 may include three apexes (APs) to absorb or trap reflected waves generated by reflection at the connecting member 140. For example, a traveling wave incident on the connecting member 140 at the apex (AP) of the vibrating member 110 is dispersed and reflected by the apex (AP) rather than being reflected in the same direction as the incident wave, thereby preventing or minimizing the overlap and interference between the reflected wave and the traveling wave, and thus preventing or minimizing the formation of a standing wave.

[0128] The vibration device 130 may be connected or coupled to a non-center portion of the vibration member 110 other than the center (CP) thereof, so that the reflected wave generated in the vibration member 110 by the vibration of the vibration device 130 may be trapped at the apex (AP) of the vibration member 110.

[0129] Therefore, the apex (AP) of the vibrating member 110 traps the reflected waves generated when the vibrating member 110 vibrates, thereby preventing or minimizing the deterioration of sound pressure characteristics due to standing waves generated by interference between the reflected waves and the traveling waves.

[0130] The acoustic device 10 shown in FIG. 7A outputs sound through the vibration of a vibrating member 110 having an apex (AP) that can trap reflected waves, and therefore the acoustic characteristics and / or sound pressure characteristics of the sound generated by the vibration of the vibrating member 110 can be improved.

[0131] Referring to FIG. 7B, in an acoustic device 10 according to another embodiment of the present disclosure, the vibrating member 110 may include a pentagonal shape.

[0132] The vibrating member 110 may have the same cross-sectional structure as the vibrating member shown in any one of Figures 2, 4 to 6. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure having a certain thickness, for example, a pentagonal flat plate structure.

[0133] The vibration member 110 can include a first surface, a second surface, five vertices (or corners) (AP), and five sides (or sidewalls).

[0134] The vibration member 110 may include five apexes (APs) to absorb or trap the reflected waves generated by reflection from the connecting member 140 .

[0135] The vibration device 130 may be connected or coupled to a non-center portion of the vibration member 110 other than the center (CP) thereof. As a result, the reflected wave generated in the vibration member 110 by the vibration of the vibration device 130 may be trapped at the apex (AP) of the vibration member 110.

[0136] Therefore, the acoustic device 10 shown in FIG. 7B outputs sound through the vibration of the vibrating member 110 having an apex (AP) that can trap reflected waves, and therefore the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibrating member 110 can be improved.

[0137] Referring to FIG. 7C, in an acoustic device 10 according to another embodiment of the present disclosure, the vibrating member 110 may include a tetragonal shape.

[0138] The vibrating member 110 may have the same cross-sectional structure as the vibrating member shown in any one of Figures 2, 4 to 6. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure having a certain thickness, for example, a tetragonal flat plate structure.

[0139] The vibration member 110 may include a first surface, a second surface, fourteen vertices (or corners) (AP), and fourteen side surfaces (or side walls) disposed between two adjacent vertices (AP). For example, the vibration member 110 may include a first surface, a second surface, seven vertices (or corners) (AP), seven vent portions (BP) disposed between the seven vertices (AP), and fourteen side surfaces (or side walls) 100s disposed between adjacent vertices (AP) and vent portions (BP). For example, the vibration member 110 may include a heptagonal shape (dotted line) in which each of the seven sides (HS) protrudes sharply toward the center (CP).

[0140] The vibration member 110 may include 14 apexes (APs) to absorb or trap the reflected waves generated by the connection member 140 .

[0141] The vibration device 130 may be connected or coupled to a non-center portion of the vibration member 110 other than the center (CP) thereof, so that the reflected wave generated in the vibration member 110 vibrating due to the vibration of the vibration device 130 may be trapped at the apex (AP) of the vibration member 110.

[0142] Therefore, the acoustic device 10 shown in FIG. 7C outputs sound through the vibration of a vibrating member 110 having an apex (AP) that can trap reflected waves, and therefore the acoustic characteristics and / or sound pressure characteristics generated by the vibration of the vibrating member 110 can be improved.

[0143] Additionally, in acoustic devices 10 according to other embodiments of the present specification, the vibrating member 110 may have a circular or elliptical shape, and even in this case, a traveling wave incident on the connecting member 140 on the curved side of the vibrating member 110 does not remain in the same direction of incidence but is dispersed and reflected by the apex (AP), thereby preventing or minimizing the phenomenon of overlap and interference between the reflected wave and the traveling wave, and thus preventing or minimizing the formation of a standing wave. Therefore, in acoustic devices 10 according to other embodiments of the present specification, the vibrating member 110 may have any one of a circular shape, an elliptical shape, and a polygonal shape having three or more apexes.

[0144] Fig. 8 is another cross-sectional view taken along line AA' shown in Fig. 1. Fig. 9 shows the vibrating member and a plurality of vibrating elements shown in Fig. 8.

[0145] 1, 8, and 9, an acoustic device 10 according to another embodiment of the present disclosure may include a vibrating member 110 and a vibrating device 130. As shown in FIG.

[0146] The vibrating member 110 may be configured substantially the same as the vibrating member shown in any one of Figures 2, 4 to 6, and 7A to 7C. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure in which the first surface 110a and the second surface 110b each have a planar structure.

[0147] The vibration device 130 may include 1st to nth (n is a natural number of 2 or more) vibration elements 131 coupled to the vibration member 110. For example, the vibration device 130 may include 1st to nth (n is a natural number of 2 or more) vibration elements 131 coupled to the second surface (or back surface) 110b of the vibration member 110. For example, the vibration device 130 may include the 1st to nth vibration elements 131 coupled or tiled to the second surface 110b of the vibration member 110 at regular intervals along the first direction (X).

[0148] Each of the first to nth vibration elements 131 may have a square shape with the horizontal length (L1) and vertical length (L2) being the same, but the embodiments of this specification are not limited thereto. For example, each of the first to nth vibration elements 131 may have a rectangular shape with the horizontal length (L1) being relatively longer than the vertical length (L2).

[0149] The sound generated in the vibrating member 110, which vibrates due to the vibration of each of the first to nth vibrating elements 131, may have reduced reproduction band and sound pressure characteristics due to constructive interference and / or destructive interference and standing waves generated by reflected waves reflected by the connecting member 140. In order to prevent or minimize the reduction in the reproduction band and sound pressure characteristics of the sound due to the influence of such reflected waves, the first distance (D1) between the first to nth vibrating elements 131 in the first direction (X) may be 3 mm or more and 5 mm or less, but the embodiments of the present specification are not limited thereto.

[0150] According to one embodiment of the present specification, when the first to nth vibration elements 131 are arranged with a first spacing (D1) of less than 3 mm or without a first spacing (D1), the reliability of each of the first to nth vibration elements 131 may be reduced due to cracks or damage caused by physical contact between the first to nth vibration elements 131 when they vibrate.

[0151] According to one embodiment of the present specification, when the first to nth vibration elements 131 are arranged at a first interval (D1) exceeding 5 mm, the acoustic characteristics and / or sound pressure characteristics due to the vibration of each of the first to nth vibration elements 131 may be reduced due to the influence of reflected waves. For example, when the first to nth vibration elements 131 are arranged at a first interval (D1) exceeding 5 mm, the acoustic characteristics and sound pressure characteristics in the low frequency band, for example, at or below 500 Hz, may be reduced.

[0152] According to one embodiment of the present specification, when the first to nth vibration elements 131 are arranged at a first interval (D1) of 3 mm or more and 5 mm or less, constructive interference and / or destructive interference and the formation of standing waves due to the reflected waves generated by the vibration of each of the first to nth vibration elements 131 are reduced or minimized, thereby increasing the sound reproduction band and increasing the sound pressure characteristics of low-frequency sounds, for example, below 500 Hz.

[0153] With respect to the first direction (X), a second distance (D2) between each of the first and nth vibration elements 131 among the first to nth vibration elements 131 and both ends (E1, E2) of the vibration member 110 may be smaller than the horizontal length (L1) of one vibration element 131 and larger than the first distance (D1). With respect to the second direction (Y), a third distance (D3) between each of the first to nth vibration elements 131 and both ends of the vibration member 110 may be smaller than the vertical length (L2) of one vibration element 131 and larger than the first distance (D1). For example, if the second distance (D2) is relatively larger than the horizontal length (L1) of one vibration element 131 and the third distance (D3) is relatively larger than the vertical length (L2) of one vibration element 131, the vibration areas of the first vibration element 131 and the nth vibration element 131 will increase relatively, which may reduce the uniformity of the acoustic characteristics and / or sound pressure characteristics. Therefore, in order to achieve uniform acoustic characteristics and / or sound pressure characteristics due to the vibration of each of the first to nth vibration elements 131, the second distance (D2) may be smaller than the horizontal length (L1) of one vibration element 131 and larger than the first distance (D1), and the third distance (D3) may be smaller than the vertical length (L2) of one vibration element 131 and larger than the first distance (D1).

[0154] Each of the first to nth vibration elements 131 can vibrate the vibration member 110 in response to a vibration drive signal supplied from the acoustic processing circuit, thereby outputting sound generated by the vibration of the vibration member 110. For example, each of the first to nth vibration elements 131 can vibrate the vibration member 110 in response to a vibration drive signal, thereby outputting sound in the same frequency range, but the embodiments of the present specification are not limited to this. For example, one or more of the first to nth vibration elements 131 can vibrate the vibration member 110 in response to a vibration drive signal, thereby outputting sound in a different frequency range.

[0155] Such an acoustic device 10 according to another embodiment of the present specification can improve the sound reproduction band and sound pressure characteristics by vibrating the vibrating member 110 and outputting sound through the vibration of each of the first to nth vibration elements 131 connected to the back surface of the vibrating member 110 so as to have an optimized spacing (D1) taking into account the influence of reflected waves.

[0156] Figures 10A and 10B are other cross-sectional views taken along line A-A' in Figure 1. Figures 10A and 10B show the acoustic device shown in Figure 8 to which a spatial separator is further added. Therefore, in the description of Figures 10A and 10B, the same reference numerals will be used for the remaining components except for the spatial separator and its related components, and redundant description thereof will be omitted.

[0157] 1 and 10A, an acoustic device 10 according to another embodiment of the present disclosure may further include a spatial separator 160.

[0158] The spatial separation section 160 may be configured between one or more of the first to nth vibration elements 131. For example, the spatial separation section 160 may be configured between two adjacent vibration elements 131 of the first to nth vibration elements 131, but the embodiments of the present specification are not limited thereto, and the spatial separation section 160 may also be configured between two or more adjacent vibration elements 131.

[0159] The spatial separator 160 according to an embodiment of the present specification may define a vibration region for one or more of the first to nth vibration elements 131 by providing an enclosed space around one or more of the first to nth vibration elements 131. For example, the spatial separator 160 may be an air gap or space in which sound is generated when the first to nth vibration elements 131 vibrate. For example, the spatial separator 160 may separate sounds or separate channels, and may prevent or reduce degradation of acoustic characteristics due to acoustic interference. For example, the spatial separator 160 may be expressed as a partition, a partition member, a sound separating member, a space separating member, or a baffle, but the embodiments of the present specification are not limited to these terms.

[0160] 10A , a spatial separator 160 according to an embodiment of the present disclosure may be coupled between the second surface 110b of the vibration member 110 and the bottom 151 of the housing 150. For example, one side (or an upper surface) of the spatial separator 160 may be coupled or connected to the second surface 110b of the vibration member 110. The other side (or a lower surface) of the spatial separator 160 may be coupled or connected to the bottom 151 of the housing 150.

[0161] The space separator 160 may include an elastic material. For example, the space separator 160 may include an elastic material for vibration absorption (or shock absorption). The space separator 160 according to an embodiment of the present disclosure may be made of a polyurethane material or a polyolefin material, but the embodiment of the present disclosure is not limited thereto. The space separator 160 may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, and a double-sided cushion tape, but the embodiment of the present disclosure is not limited thereto. For example, the space separator 160 may be made of the same material as the connecting member 140.

[0162] Referring to FIG. 10B, a space separator 160 according to another embodiment of the present disclosure may include a partition wall 161 and a partition member 162.

[0163] The partition wall 161 may protrude from the bottom 151 of the housing 150 into a region between the plurality of vibration elements 131. For example, the partition wall 161 may protrude from the bottom 151 of the housing 150 between two adjacent vibration elements of the plurality of vibration elements 131 into a region between the two adjacent vibration elements. For example, the partition wall 161 may be located on the same plane as or aligned with the connecting frame portion 153 of the housing 150. For example, the distance between the bottom 151 and the upper surface of the partition wall 161 may be the same as the distance between the bottom 151 and the connecting frame portion 153.

[0164] The partition member 162 may be disposed between the partition 161 and the vibration member 110. For example, the upper side (or upper surface) of the partition member 162 may be connected or coupled to the second surface 110b of the vibration member 110. The lower side (or lower surface) of the partition member 162 may be connected or coupled to the upper side (or upper surface) of the partition 161.

[0165] The partition member 162 may include an elastic material. For example, the partition member 162 may include an elastic material for vibration absorption (or shock absorption). The partition member 162 according to an embodiment of the present disclosure may be made of a polyurethane material or a polyolefin material, but the embodiment of the present disclosure is not limited thereto, and may include one or more of an adhesive, a double-sided tape, a double-sided foam tape, and a double-sided cushion tape, but the embodiment of the present disclosure is not limited thereto. For example, the partition member 162 may be made of the same material as the connecting member 140.

[0166] Such an acoustic device 10 according to another embodiment of the present specification may further include a spatial separation unit 160, thereby separating the sounds generated by the vibrations of the first to nth vibration elements 131 or separating the channels to output stereo sound in a two-channel format, thereby further improving the sound reproduction band and sound pressure characteristics.

[0167] Fig. 11 is a plan view showing an acoustic device according to another embodiment of the present specification. Fig. 12 is a cross-sectional view taken along line BB' shown in Fig. 11. Fig. 13 is a perspective view showing the housing shown in Figs. 11 and 12.

[0168] 11-13, an acoustic device 20 according to another embodiment of the present disclosure may include a vibrating member 110, a vibrating device 130, and a housing 150.

[0169] The vibrating member 110 may be configured substantially the same as the vibrating member shown in any one of Figures 2, 4 to 6. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure in which the first surface 110a and the second surface 110b each have a planar structure.

[0170] The vibrating member 110 can include a plurality of regions (A1, A2, A3). For example, the vibrating member 110 can include first to nth (n is a natural number equal to or greater than 3) regions (A1, A2, A3). For example, the vibrating member 110 can include first to third regions (A1, A2, A3) arranged along the first direction (X).

[0171] The vibration device 130 may include a plurality of vibration elements 130A, 130B, and 130C configured to vibrate a plurality of regions (A1, A2, and A3), respectively. For example, the vibration device 130 may include one or more first to nth vibration elements 130A, 130B, and 130C configured to vibrate the first to nth regions (A1, A2, and A3) of the vibration member 110, respectively. Each of the first to nth regions (A1, A2, and A3) of the vibration member 110 may vibrate due to vibration of one or more corresponding vibration elements among the one or more first to nth vibration elements 130A, 130B, and 130C, and output sound. According to one embodiment of the present specification, sound output from one or more of the first to nth regions (A1, A2, and A3) of the vibration member 110 may have a different frequency range from sound output from the remaining regions.

[0172] According to one embodiment of the present specification, the vibration device 130 may include one or more first to third vibration elements 130A, 130B, and 130C configured to vibrate the first to third regions (A1, A2, and A3), respectively.

[0173] One or more first vibration elements 130A may be arranged along the first direction (X) to vibrate a first region (A1) of the vibrating member 110. One or more second vibration elements 130B may be arranged along the first direction (X) to vibrate a second region (A2) of the vibrating member 110. One or more third vibration elements 130B may be arranged along the first direction (X) to vibrate a third region (A3) of the vibrating member 110. Each of the first to third regions (A1, A2, A3) of the vibrating member 110 vibrates due to vibration of one or more corresponding vibration elements among the one or more first to third vibration elements 130A, 130B, 130C, and can output sound. According to one embodiment of the present specification, sound output from one or more of the first to third regions (A1, A2, A3) of the vibrating member 110 may have a different frequency range from sound output from the remaining regions.

[0174] The housing 150 may be disposed on the rear surface of the vibrating member 110 to cover the second surface 110b of the vibrating member 110 and one or more vibrating elements 131. The housing 150 has an accommodation space for accommodating the vibrating device 130 and may be box-shaped with one side open. The housing 150 may be connected or coupled to an edge portion of the second surface 110b of the vibrating member 110 via the connecting member 140. As a result, the accommodation space of the housing 150 may be covered by the vibrating member 110. The connecting member 140 is substantially the same as the connecting member 140 described with reference to FIGS. 1 to 3, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0175] The housing 150 according to an embodiment of the present specification may include a bottom portion 151 and a side portion 152. The housing 150 may further include a connecting frame portion 153 and a pattern portion 150p. The housing 150 having such a configuration is substantially the same as the housing 150 described with reference to FIGS. 1 to 3, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0176] The side portion 152 of the housing 150 according to one embodiment of the present specification may include a first side portion 152a connected to a first edge portion of the bottom portion 151 parallel to the first direction (X), a second side portion 152b connected to a second edge portion of the bottom portion 151 parallel to the first edge portion of the bottom portion 151, a third side portion 152c connected to a third edge portion of the bottom portion 151 parallel to the second direction (Y), and a fourth side portion 152d connected to a fourth edge portion of the bottom portion 151 parallel to the third edge portion of the bottom portion 151. Each of the first to fourth side portions 152a to 152d may be configured to be inclined at a certain angle between the bottom portion 151 and the connecting frame portion 153.

[0177] The housing 150 according to an embodiment of the present disclosure may further include a space separator 160 .

[0178] The space separating unit 160 can separate the accommodation space of the housing 150 into a plurality of spaces (CS1, CS2, CS3) corresponding to the plurality of regions (A1, A2, A3) of the plurality of vibration members 110, respectively. For example, the space separating unit 160 can separate the accommodation space of the housing 150 into first to n-th spaces (CS1, CS2, CS3) corresponding to the first to n-th regions (A1, A2, A3) of the vibration member 110, respectively. For example, the space separating unit 160 can separate the accommodation space of the housing 150 into first to third spaces (CS1, CS2, CS3) corresponding to the first to third regions (A1, A2, A3) of the vibration member 110, respectively.

[0179] The space separator 160 according to an embodiment of the present disclosure may include a first partition wall 161a and a second partition wall 161b.

[0180] The first partition 161a may be disposed between a first space (CS1) and a second space (CS2) corresponding to the first and second regions (A1, A2) of the vibration member 110. The first partition 161a may be coupled between the first side portion 152a and the second side portion 152b to spatially separate the first space (CS1) and the second space (CS2). For example, the first partition 161a may protrude from the bottom 151 of the housing 150 between the first and second regions (A1, A2) of the vibration member 110 and be coupled between the first side portion 152a and the second side portion 152b to spatially separate the first space (CS1) and the second space (CS2).

[0181] The second partition 161b may be disposed between a second space (CS2) and a third space (CS3) corresponding to the second and third regions (A2, A3) of the vibration member 110. The second partition 161b may be coupled between the first side portion 152a and the second side portion 152b to spatially separate the second space (CS2) and the third space (CS3). For example, the second partition 161b may protrude from the bottom 151 of the housing 150 between the second and third regions (A2, A3) of the vibration member 110 and be coupled between the first side portion 152a and the second side portion 152b to spatially separate the second space (CS2) and the third space (CS3).

[0182] The space separator 160 according to an embodiment of the present disclosure may include a first partition member 162a and a second partition member 162b.

[0183] The first partition member 162a may be disposed between the first partition 161a and the vibration member 110. For example, the upper side (or upper surface) of the first partition member 162a may be connected or coupled to the second surface 110b of the vibration member 110. The lower side (or lower surface) of the first partition member 162a may be connected or coupled to the upper side (or upper surface) of the first partition 161a.

[0184] The second partition member 162b may be disposed between the second partition 161b and the vibration member 110. For example, the upper side (or upper surface) of the second partition member 162b may be connected or coupled to the second surface 110b of the vibration member 110. The lower side (or lower surface) of the second partition member 162b may be connected or coupled to the upper side (or upper surface) of the second partition 161b.

[0185] Each of the first and second partition members 162a and 162b may include an elastic material. For example, each of the first and second partition members 162a and 162b may include an elastic material for vibration absorption (or shock absorption). According to an embodiment of the present disclosure, each of the first and second partition members 162a and 162b may be made of a polyurethane material or a polyolefin material. The embodiment of the present disclosure is not limited thereto, and may include one or more of adhesive, double-sided tape, double-sided foam tape, and double-sided cushion tape. For example, each of the first and second partition members 162a and 162b may be made of the same material as the connecting member 140.

[0186] The housing 150 according to an embodiment of the present disclosure may further include a first sound isolating portion 171 and a second sound isolating portion 173 .

[0187] The first sound isolation section 171 may be disposed in a first space (CS1) between one or more first vibration elements 130A and the first partition wall 161a. The second sound isolation section 173 may be disposed in a third space (CS3) between one or more third vibration elements 130C and the second partition wall 162a.

[0188] Each of the first sound isolating portion 171 and the second sound isolating portion 173 may include one or more lips 171a, 171b and one or more sound isolating members 173a, 173b.

[0189] One or more lips 171a, 171b may protrude from the inner surfaces of one or more of the first side portion 152a and the second side portion 152b along the second direction (Y) and the third direction (Z).

[0190] According to one embodiment of the present disclosure, one or more lips 171a, 171b may protrude from an inner surface of either one of the first side portion 152a and the second side portion 152b. Here, the protruding length of the one or more lips 171a, 171b may be shorter than the distance between the first side portion 152a and the second side portion 152b. According to one embodiment of the present disclosure, one or more lips 171a, 171b may protrude from an inner surface of each of the first side portion 152a and the second side portion 152b. Here, the protruding length of the one or more lips 171a, 171b may be less than half the distance between the first side portion 152a and the second side portion 152b.

[0191] According to one embodiment of the present specification, when one or more lips 171a, 171b are protruded so as to be connected between the first side portion 152a and the second side portion 152b, the sound separation effect between the first to third spaces (CS1, CS2, CS3) minimizes vibrations transmitted from the first and third spaces (CS1, CS3) to the second space (CS2), which may result in a decrease in the acoustic characteristics and sound pressure characteristics of the treble range and a decrease in the stereo sound characteristics. Therefore, in order to minimize the decrease in the acoustic characteristics and sound pressure characteristics of the treble range and improve the stereo sound characteristics, the protruding length of one or more lips 171a, 171b is less than half the distance between the first side portion 152a and the second side portion 152b.

[0192] One or more sound isolating members 173a, 173b may be disposed between one or more lips 171a, 171b and the second surface 110b of the vibrating member 110. For example, the upper sides (or upper surfaces) of one or more sound isolating members 173a, 173b may be connected or joined to the second surface 110b of the vibrating member 110. The lower sides (or lower surfaces) of one or more sound isolating members 173a, 173b may be connected or joined to the upper sides (or upper surfaces) of one or more lips 171a, 171b. The one or more sound isolating members 173a, 173b may include an elastic material for vibration absorption (or shock absorption), or may include the same material as any of the first partition member 162a, the second partition member 162b, and the connecting member 140.

[0193] According to an embodiment of the present disclosure, each of the first sound isolation unit 171 and the second sound isolation unit 173 may include a plurality of lips 171a, 171b arranged at predetermined intervals along the first direction (X). Each of the plurality of lips 171a, 171b may protrude from the inner surface of one or more of the first side portion 152a and the second side portion 152b along the second direction (Y) to have different lengths. The protruding length of each of the plurality of lips 171a, 171b may be less than half the distance between the first side portion 152a and the second side portion 152b. According to an embodiment of the present disclosure, the protruding length of each of the plurality of lips 171a, 171b may vary along the first direction (X) toward the space isolation unit 160 or the second space (CS2). For example, the protruding length of each of the plurality of lips 171a, 171b may increase in the direction of the first direction (X) toward the space separator 160 or the second space (CS2).

[0194] According to an embodiment of the present disclosure, each of the first sound isolating unit 171 and the second sound isolating unit 173 may include a plurality of sound isolating members 173a and 173b.

[0195] Each of the plurality of sound isolating members 173a, 173b may be disposed between each of the plurality of lips 171a, 171b and the second surface 110b of the vibrating member 110. For example, the upper side (or upper surface) of each of the plurality of sound isolating members 173a, 173b may be connected or coupled to the second surface 110b of the vibrating member 110. The lower side (or lower surface) of each of the plurality of sound isolating members 173a, 173b may be connected or coupled to the upper side (or upper surface) of each of the plurality of lips 171a, 171b. The plurality of sound isolating members 173a, 173b may include an elastic material for vibration absorption (or shock absorption), or may include the same material as any one of the first partition member 162a, the second partition member 162b, and the connecting member 140.

[0196] The housing 150 according to an embodiment of the present disclosure may further include a first sound-limiting portion 175 and a second sound-limiting portion 176 .

[0197] The first sound suppressing unit 175 may be disposed around one or more first vibration elements 130A. The first sound suppressing unit 175 traps reflected waves generated by the vibration of one or more first vibration elements 130A, thereby preventing or minimizing a decrease in sound pressure characteristics due to standing waves generated by interference between reflected waves and traveling waves.

[0198] The first sound limiting portion 175 according to an embodiment of the present disclosure may include one or more first protrusions 175a and one or more first sound limiting members 175b.

[0199] The one or more first protrusions 175a may protrude into the first space (CS1) from the inner surfaces of one or more of the first to third side portions 152a, 152b, and 152c and the first partition wall 161a that surround the first space (CS1). For example, the one or more first protrusions 175a may face the inner surfaces of one or more of the first side portion 152a and the second side portion 152b that are located between the one or more first vibration elements 130A and the first partition wall 161a. For example, the one or more first protrusions 175a may face the central portions of the one or more first vibration elements 130A from the inner surfaces of one or more of the third side portion 152c and the first partition wall 161a.

[0200] According to one embodiment of the present specification, the first sound-limiting unit 175 may include four or more first protrusions 175a protruding into the first space CS1 from the inner surfaces of the first to third side portions 152a, 152b, and 152c and the first partition wall 161a, which surround the first space CS1. For example, one or more first protrusions 175a protruding from the inner surfaces of the first and second side portions 152a and 152b along the second direction (Y) may be formed between the first vibration element 130A and the first sound-isolating unit 171. One or more first protrusions 175a protruding from the inner surface of the third side portion 152c along the first direction (X) may protrude toward the center of the first vibration element 130A. One or more first protrusions 175a protruding from the inner surface of the first partition wall 161a may protrude toward the center of the first vibration element 130A.

[0201] The one or more first sound limiting members 175b may be disposed between the one or more first protrusions 175a and the second surface 110b of the vibrating member 110. For example, the upper sides (or upper surfaces) of the one or more first sound limiting members 175b may be connected or coupled to the second surface 110b of the vibrating member 110. The lower sides (or lower surfaces) of the one or more first sound limiting members 175b may be connected or coupled to the upper sides (or upper surfaces) of the one or more first protrusions 175a. The one or more first sound limiting members 175b may include an elastic material for vibration absorption (or shock absorption), or may include the same material as any one of the first partition member 162a, the second partition member 162b, and the connecting member 140.

[0202] According to one embodiment of the present specification, the first protrusion 175a and the first sound limiting member 175b protruding from the inner surfaces of the first to third side portions 152a, 152b, and 152c may be configured to trap reflected waves generated by the connecting member 140. The first protrusion 175a and the first sound limiting member 175b protruding from the inner surface of the first partition wall 161a may be configured to trap reflected waves generated by the first partition wall member 162a.

[0203] The second sound limiting portion 176 may be disposed around one or more third vibration elements 130C. The second sound limiting portion 176 traps reflected waves generated by the vibration of one or more third vibration elements 130C, thereby preventing or minimizing a decrease in sound pressure characteristics due to standing waves generated by interference between reflected waves and traveling waves.

[0204] The second sound limiting portion 176 according to an embodiment of the present disclosure may include one or more second protrusions 176a and one or more second sound limiting members 176b.

[0205] The one or more second protrusions 176a may protrude into the third space (CS3) from the inner surfaces of one or more of the first, second, and fourth side portions 152a, 152b, and 152d and the second partition wall 161b that surround the third space (CS3). For example, the one or more second protrusions 176a may face the inner surfaces of one or more of the first side portion 152a and the second side portion 152b that are located between the one or more third vibration elements 130C and the second partition wall 162a. For example, the one or more second protrusions 176a may face the central portions of the one or more third vibration elements 130C from the inner surfaces of one or more of the fourth side portion 152d and the second partition wall 161b.

[0206] According to one embodiment of the present specification, the second sound-limiting portion 176 may include four or more second protrusions 176a protruding into the third space CS3 from the inner surfaces of the first, second, and fourth side portions 152a, 152b, and 152d and the second partition wall 161b, which surround the third space CS3. For example, one or more second protrusions 176a protruding from the inner surfaces of the first and second side portions 152a and 152b along the second direction (Y) may be disposed between the third vibration element 130C and the second sound-isolating portion 173. One or more second protrusions 176a protruding from the inner surface of the fourth side portion 152d along the first direction (X) may protrude toward the center of the third vibration element 130C. One or more second protrusions 176a protruding from the inner surface of the second partition wall 162a may protrude toward the center of the third vibration element 130C.

[0207] One or more second sound limiting members 176b may be disposed between one or more second protrusions 176a and the second surface 110b of the vibrating member 110. For example, the upper sides (or upper surfaces) of the one or more second sound limiting members 176b may be connected or coupled to the second surface 110b of the vibrating member 110. The lower sides (or lower surfaces) of the one or more second sound limiting members 176b may be connected or coupled to the upper sides (or upper surfaces) of the one or more second protrusions 176a. The one or more second sound limiting members 176b may include an elastic material for vibration absorption (or shock absorption), or may include the same material as any one of the first partition member 162a, the second partition member 162b, and the connecting member 140.

[0208] According to one embodiment of the present specification, the second protrusions 176a and the second sound limiting members 176b protruding from the inner surfaces of the first, second, and fourth side portions 152a, 152b, and 152d may be configured to trap reflected waves generated by the connecting member 140. The second protrusions 176a and the second sound limiting members 176b protruding from the inner surface of the second partition wall 162a may be configured to trap reflected waves generated by the second partition wall member 162b.

[0209] According to one embodiment of the present specification, among the spaces provided in housing 150, a space having one or more first protrusions 175a on third side 152c and one or more second protrusions 176a on fourth side 152d may be configured to output frequencies in the high frequency range. According to one embodiment of the present specification, among the spaces provided in housing 150, a space having one or more first protrusions 175a on first side 152a and second side 152b, one or more second protrusions 176a on first side 152a and second side 152b, one or more first sound limiting members 175b, and one or more second sound limiting members 176b may be configured to output frequencies in the low frequency range.

[0210] According to an embodiment of the present specification, the second space (CS2) in which the one or more second vibrating elements 130B are located may be configured to output frequencies in the mid-low range.

[0211] The acoustic device 20 according to another embodiment of the present disclosure may further include an acoustic driving circuit unit 180 disposed in the second space (CS2) of the housing 150.

[0212] The acoustic driving circuit unit 180 generates acoustic data based on an externally supplied acoustic source (or a digital acoustic source), and generates a vibration driving signal corresponding to the acoustic data to vibrate one or more of the first to third vibration elements 130A, 130B, and 130C of the vibration device 130 individually or simultaneously.

[0213] The acoustic driving circuit unit 180 according to an embodiment of the present specification may include an acoustic data generation circuit unit that generates acoustic data based on an externally supplied acoustic source (or a digital acoustic source), and an acoustic processing circuit that generates a vibration driving signal based on the acoustic data provided from the acoustic data generation circuit unit and supplies the vibration driving signal to one or more of the first to third vibration elements 130A, 130B, and 130C of the vibration device 130. The acoustic driving circuit unit 180 according to an embodiment of the present specification may further include peripheral circuits necessary for driving the acoustic device, such as a power supply generating circuit, a wireless communication circuit, and a battery.

[0214] Additionally, one or more second vibration elements 130B arranged in the second space (CS2) of the housing 150 may be omitted, thereby allowing the spatial separation unit 160 to further improve the sound output characteristics by separating the sounds output from the first space (CS1) and the third space (CS3), and thereby allowing the audio device 20 to output stereo sound in two-channel form by separating the left and right sounds by the spatial separation unit 160.

[0215] The acoustic device 20 according to another embodiment of the present specification can separate and output sounds by vibrating each region of the vibrating member 110 corresponding to a plurality of spaces (A1, A2, A3) spatially separated by the space separation unit 160, thereby separating the sounds or outputting the separate channels, thereby preventing or minimizing degradation of acoustic characteristics due to acoustic interference. Furthermore, the acoustic device 20 according to another embodiment of the present specification can prevent or minimize degradation of acoustic characteristics and / or sound pressure characteristics due to reflected waves by trapping reflected waves using the sound restriction units 175 and 176. The acoustic device 20 according to another embodiment of the present specification can output two-channel stereo sound by separating left and right sounds using the space separation unit 160, and can improve stereo sound characteristics by separating high-frequency sounds using the sound separation units 171 and 173.

[0216] Fig. 14 is a plan view showing an acoustic device according to another embodiment of the present specification. Fig. 15 is a cross-sectional view taken along line CC' shown in Fig. 14. Fig. 16 is a conceptual diagram showing directional sound output from an acoustic device according to another embodiment of the present specification.

[0217] 14 to 16, an acoustic device 30 according to another embodiment of the present disclosure may include a vibrating member 110, a vibrating device 230, and a housing 150.

[0218] The vibrating member 110 may be configured substantially the same as the vibrating member shown in any one of Figures 2, 4 to 6. However, the embodiments of the present specification are not limited thereto, and the vibrating member 110 may have a flat plate structure in which the first surface 110a and the second surface 110b each have a planar structure.

[0219] The vibrating member 110 can include a plurality of regions (A1 to A5). For example, the vibrating member 110 can include first to n-th (n is a natural number equal to or greater than 5) regions (A1 to A5). For example, the vibrating member 110 can include first to fifth regions (A1 to A5) arranged along the first direction (X).

[0220] The vibration device 230 may include one or more vibration elements 231-1 to 231-5 configured to vibrate the first to n-th regions (A1 to A5) of the vibration member 110, respectively.

[0221] Each of the first to n-th regions (A1 to A5) of the vibrating member 110 can vibrate and output sound due to vibration of one or more vibration elements 231-1 to 231-5. According to one embodiment of the present specification, the sound output from one or more of the first to n-th regions (A1 to A5) of the vibrating member 110 can have a different frequency range from the sound output from the remaining regions.

[0222] According to one embodiment of the present specification, the first region (A1) of the vibration member 110 may include the first edge portion (E1) of the vibration member 110, and the nth region (A5) of the vibration member 110 may include the second edge portion (E2) of the vibration member 100. For example, the first region (A1) of the vibration member 110 may be the first edge portion (E1) of the vibration member 110, and the nth region (A5) of the vibration member 110 may be the second edge portion (E2) of the vibration member 100.

[0223] According to one embodiment of the present specification, the frequency range of the sound output from each of the first to nth regions (A1 to A5) of the vibrating member 110 may become higher from the middle region of the vibrating member 110 to the first region (A1) and the nth region (A5), but the embodiment of the present specification is not limited thereto. For example, if the vibrating member 110 includes the first to fifth regions (A1 to A5), the sound output from each of the first region (A1) and the fifth region (A5) of the vibrating member 110 may have a frequency range above audible frequencies or a frequency range of a specific frequency signal (or ultrasonic wave), the sound output from the third region (A3) in the middle region of the vibrating member 110 may have a mid-low frequency range, and the sound output from each of the second region (A2) and the fourth region (A4) of the vibrating member 110 may have a high frequency range. For example, the mid-low frequency band may be 200 Hz to 1 kHz, the high frequency band may have a frequency of 1 kHz or more or 3 kHz or more, and the frequency band of the specific frequency signal (or ultrasonic wave) may have a frequency of 30 kHz or more, but the embodiments of this specification are not limited thereto. In the following description of the embodiments of this specification, the specific frequency signal may be considered to be ultrasonic wave.

[0224] According to one embodiment of the present specification, the sizes (or areas) of the first to nth regions (A1 to A5) in the vibrating member 110 may increase relatively more from the first region (A1) and the nth region (A5) toward the intermediate region. Therefore, an acoustic device 30 according to another embodiment of the present specification outputs deep bass sound through the intermediate region of the vibrating member 110, which has a relatively large area, and outputs treble sound through the intermediate region of the vibrating member 110 and the region between the first region (A1) and the nth region (A5), thereby providing the user (or listener) with improved sound quality and a more three-dimensional sound.

[0225] According to one embodiment of the present specification, the vibration device 130 may include one or more first to nth vibration elements 231-1 to 231-5 configured to vibrate the first to nth regions (A1 to A5), respectively.

[0226] According to one embodiment of the present specification, the size of each of the one or more first to nth vibration elements 231-1 to 231-5 may become smaller from the middle region of the vibration member 110 to the first region (A1) and the nth region (A5), but the embodiment of the present specification is not limited thereto.

[0227] The one or more first vibration elements 231-1 may be configured to vibrate the first region (A1) of the vibration member 110 to generate or output ultrasonic waves (UW). The one or more nth vibration elements 231-5 may be configured to vibrate the nth region (A5) of the vibration member 110 to generate or output multiple ultrasonic waves (UW, UW1) having different frequencies from each other.

[0228] According to one embodiment of the present specification, any one of the plurality of ultrasonic waves (UW, UW1) output from the nth region (A5) of the vibrating member 110 may have the same frequency as the ultrasonic wave (UW) output from the first region (A1) of the vibrating member 110. The remaining ultrasonic wave (UW1) of the plurality of ultrasonic waves (UW, UW1) output from the nth region (A5) of the vibrating member 110 may have a higher frequency than the ultrasonic wave (UW) output from the first region (A1) of the vibrating member 110. As a result, a user (or listener) can hear a difference sound of a frequency corresponding to a difference frequency (or differential frequency) distortion between the ultrasonic wave (UW) output from the first region (A1) and the ultrasonic wave (UW, UW1) output from the nth region (A5) of the vibrating member 110. For example, when a 40 kHz ultrasonic wave (UW) is output from the first region (A1) of the vibrating member 110 and a 42 kHz ultrasonic wave (UW1) is output from the nth region (A5) of the vibrating member 110, a listener can hear a 2 kHz difference sound corresponding to the difference frequency (or differential frequency) distortion between the 40 kHz ultrasonic wave (UW) and the 42 kHz ultrasonic wave (UW1). Therefore, the acoustic device 30 according to an embodiment of the present specification can realize a user privacy protection function by outputting directional sound through the output of ultrasonic waves, which prevents sound from being heard in non-listening areas other than a specific listening area.

[0229] According to an embodiment of the present specification, one or more first vibration elements 231-1 arranged in the first region (A1) of the vibration member 110 may be configured to transmit and receive ultrasound. One or more nth vibration elements 231-5 arranged in the nth region (A5) of the vibration member 110 may be configured to transmit and receive ultrasound. For example, one or more first vibration elements 231-1 may be configured to receive ultrasound, and one or more nth vibration elements 231-5 may be configured to transmit ultrasound, although the embodiments of the present specification are not limited thereto. Therefore, an acoustic device 30 according to an embodiment of the present specification can sense position and / or movement information of a user (or listener) by transmitting and receiving ultrasound via one or more of the one or more first vibration elements 231-1 and one or more nth vibration elements 231-5, and thereby output sound optimized or directional sound according to the position and / or movement of the user (or listener).

[0230] The housing 150 may be disposed on the rear surface of the vibrating member 110 to cover the second surface 110b of the vibrating member 110 and the vibrating device 230. The housing 150 has an accommodation space 150s for accommodating the vibrating device 230 and may be box-shaped with one side open. The housing 150 may be connected or coupled to an edge portion of the second surface 110b of the vibrating member 110 via the connecting member 140. As a result, the accommodation space 150s of the housing 150 may be covered by the vibrating member 110. The connecting member 140 is substantially the same as the connecting member 140 described with reference to FIGS. 1 to 3, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0231] The housing 150 according to an embodiment of the present specification may include a bottom portion 151 and a side portion 152. The housing 150 may further include a connecting frame portion 153 and a pattern portion 150p. The housing 150 having such a configuration is substantially the same as the housing 150 described with reference to FIGS. 1 to 3, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0232] The acoustic device 30 according to another embodiment of the present specification can provide the user (or listener) with improved sound quality and a three-dimensional sound effect by outputting mid-low frequency band sounds from the middle region of the vibrating member 110 and high frequency band sounds from the edge portion of the vibrating member 110. In addition, the acoustic device 30 according to another embodiment of the present specification can realize a user's privacy protection function by outputting directional sound through the output of a specific frequency signal (or ultrasound), thereby preventing sound from being heard in non-listening areas other than the specific listening area. In addition, the acoustic device 30 according to another embodiment of the present specification can output sound or directional sound optimized for the position and / or movement information of the user (or listener) through the transmission and reception of a specific frequency signal (or ultrasound).

[0233] Fig. 17 is a diagram showing a vibration element according to one embodiment of the present specification. Fig. 18 is a cross-sectional view taken along line D-D' shown in Fig. 17. Fig. 19 is a perspective view showing the piezoelectric vibration part shown in Fig. 18. Figs. 17 to 19 are drawings showing other embodiments of the vibration element shown in one or more of Figs. 1 to 13.

[0234] 17 to 19, the vibration element 131 according to one embodiment of the present specification may be expressed as a flexible vibration structure, a flexible vibrator, a flexible vibration generating element, a flexible vibration generator, a flexible sound generator, a flexible sound element, a flexible sound generating element, a flexible sound generator, a flexible actuator, a flexible speaker, a flexible piezoelectric speaker, a film actuator, a film-type piezoelectric composite actuator, a film speaker, a film-type piezoelectric speaker, or a film-type piezoelectric composite speaker, and the embodiments of the present specification are not limited thereto.

[0235] The vibration element 131 according to an embodiment of the present specification may include a vibration generating section having a piezoelectric vibration section 131a, a first electrode section 131b, and a second electrode section 131c.

[0236] The piezoelectric vibrating unit 131a may include a piezoelectric material (or electroactive material) that exhibits the piezoelectric effect. For example, a piezoelectric material may have the characteristic that, when pressure or torsion is applied to a crystalline structure by an external force, a potential difference is generated by dielectric polarization due to a change in the relative positions of positive (+) ions and negative (-) ions, and vibration is generated by an electric field due to an inversely applied voltage. For example, the piezoelectric vibrating unit 131a may be expressed by other terms such as a piezoelectric layer, piezoelectric layer, piezoelectric material layer, electroactive layer, vibrating unit, piezoelectric material unit, electroactive unit, piezoelectric structure, piezoelectric composite layer, piezoelectric composite, or piezoelectric ceramic composite, and examples of the present specification are not limited to these. The piezoelectric vibrating unit 131a may be made of a transparent, translucent, or opaque piezoelectric material, and may be transparent, translucent, or opaque.

[0237] The piezoelectric vibrating portion 131a according to the embodiments of the present specification may include a plurality of first portions 131a1 and a plurality of second portions 131a2. For example, the plurality of first portions 131a1 and the plurality of second portions 131a2 may be alternately arranged along a first direction (X) (or a second direction (Y)). For example, the first direction (X) may be the horizontal direction of the piezoelectric vibrating portion 131a, and the second direction (Y) may be the vertical direction of the piezoelectric vibrating portion 131a that intersects with the first direction (X), but is not limited thereto. For example, the first direction (X) may be the vertical direction of the piezoelectric vibrating portion 131a, and the second direction (Y) may be the horizontal direction of the piezoelectric vibrating portion 131a.

[0238] Each of the plurality of first portions 131a1 may be composed of an inorganic material portion. The inorganic material portion may include a piezoelectric material having a piezoelectric effect, a composite piezoelectric material, or an electroactive material. For example, the first portion 131a1 may be referred to as a piezoelectric portion, a piezoelectric material portion, a composite piezoelectric material portion, an active portion, or an electroactive portion, but the embodiments of the present specification are not limited thereto.

[0239] Each of the first portions 131a1 may be made of a ceramic material capable of achieving relatively high vibration, or may be made of a piezoelectric ceramic having a perovskite crystal structure. The perovskite crystal structure may have piezoelectric and inverse piezoelectric effects and may be a plate-like structure with orientation. The perovskite crystal structure may be expressed by the chemical formula ABO3, where the A site is composed of a divalent metal element and the B site is composed of a tetravalent metal element. In one embodiment of the present specification, in the chemical formula ABO3, the A site and the B site may be cations, and O may be an anion. For example, each of the first portions 131a1 may include at least one of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, although the embodiment of the present specification is not limited thereto.

[0240] According to an embodiment of the present specification, the piezoelectric vibrating unit 131a or the first portion 131a1 may include, but is not limited to, a PZT (lead zirconate titanate)-based material containing lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate)-based material containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb). Alternatively, the piezoelectric vibrating unit 131a or the first portion 131a1 may include at least one of CaTiO3, BaTiO3, and SrTiO3, which do not contain lead (Pb).

[0241] According to an embodiment of the present specification, each of the first portions 131a1 may be disposed between the second portions 131a2 and may have a first width (W1) parallel to the first direction (X) (or the second direction (Y)) and a length parallel to the second direction (Y) (or the first direction (X)). Each of the second portions 131a2 may have a second width (W2) parallel to the first direction (X) (or the second direction (Y)) and a length parallel to the second direction (Y) (or the first direction (X)). The first width (W1) may be the same as or different from the second width (W2). For example, the first width (W1) may be greater than the second width (W2). For example, the first portion 131a1 and the second portion 131a2 may have a line shape or a stripe shape having the same or different sizes. Therefore, the piezoelectric vibration part 131a has a 2-2 composite structure with piezoelectric characteristics of the 2-2 vibration mode, and thus can have a resonance frequency of 20 kHz or less, but the embodiments of this specification are not limited thereto. For example, the resonance frequency of the piezoelectric vibration part 131a can be changed depending on at least one of the shape, length, and thickness.

[0242] In the piezoelectric vibration unit 131a, the plurality of first portions 131a1 and the plurality of second portions 131a2 may be arranged (or arrayed) next to each other on the same plane (or the same layer). Each of the plurality of second portions 131a2 may be connected or bonded to an adjacent first portion 131a1 by being configured to fill the gap between two adjacent first portions 131a1. This allows the piezoelectric vibration unit 131a to be expanded to a desired size or length by side-coupling (or connection) the first portions 131a1 and the second portions 131a2.

[0243] In the piezoelectric vibrating part 131a, the width (W2) of each of the plurality of second portions 131a2 may gradually decrease from the middle portion of the piezoelectric vibrating part 131a or the vibrating element 131 toward both edge portions (or both ends).

[0244] According to one embodiment of the present specification, the second portion 131a2 having the largest width (W2) among the plurality of second portions 131a2 may be located in a portion where the greatest stress is concentrated when the piezoelectric vibrating portion 131a or the vibrating element 131 vibrates in the vertical direction (Z) (or thickness direction). The second portion 131a2 having the smallest width (W2) among the plurality of second portions 131a2 may be located in a portion where the least stress is generated when the piezoelectric vibrating portion 131a or the vibrating element 131 vibrates in the vertical direction (Z). For example, the second portion 131a2 having the largest width (W2) among the plurality of second portions 131a2 may be located in a central portion of the piezoelectric vibrating portion 131a, and the second portion 131a2 having the smallest width (W2) among the plurality of second portions 131a2 may be located at both edge portions of the piezoelectric vibrating portion 131a. As a result, when the piezoelectric vibrating part 131a or the vibrating element 131 vibrates in the vertical direction (Z), interference of sound waves generated at the part where the greatest stress is concentrated or overlap of resonance frequencies can be minimized, thereby improving the phenomenon of dipping of sound pressure generated in the low frequency range and improving the flatness of acoustic characteristics in the low frequency range. For example, the flatness of acoustic characteristics can be the magnitude of the deviation between the maximum sound pressure and the minimum sound pressure.

[0245] In the piezoelectric vibrating part 131a, each of the plurality of first portions 131a1 may have a different size (or width). For example, the size (or width) of each of the plurality of first portions 131a1 may gradually decrease or increase from the middle portion of the piezoelectric vibrating part 131a or the vibrating element 131 toward both edge portions (or both ends) of the piezoelectric vibrating part 131a. As a result, the piezoelectric vibrating part 131a may have various natural vibration frequencies due to the vibration of each of the plurality of first portions 131a1 having different sizes, thereby improving the sound pressure characteristics of the sound and expanding the sound reproduction band.

[0246] Each of the plurality of second portions 131a2 may be disposed between the plurality of first portions 131a1. As a result, the piezoelectric vibrating portion 131a or the vibrating element 131 may have increased vibrational energy due to the link within the unit cell of the first portion 131a1 by the second portion 131a2, thereby improving vibration characteristics and ensuring piezoelectric characteristics and flexibility. For example, the second portion 131a2 may be one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but the embodiments of the present specification are not limited thereto.

[0247] According to an embodiment of the present specification, each of the plurality of second portions 131a2 may be made of an organic material portion. For example, the organic material portion may be disposed between the inorganic material portions to absorb impacts applied to the inorganic material portion (or the first portion) and release stress concentrated in the inorganic material portion, thereby improving the durability of the piezoelectric vibrating portion 131a or the vibrating element 131 and providing flexibility to the piezoelectric vibrating portion 131a or the vibrating element 131.

[0248] According to an embodiment of the present specification, the second portion 131a2 may have a lower modulus (or Young's modulus) and viscoelasticity than the first portion 131a1, thereby improving the reliability of the first portion 131a1, which is vulnerable to impact due to the brittle characteristics of the first portion 131a1. For example, the second portion 131a2 may be made of a material having a loss factor of 0.01 to 1 and a modulus of 0.1 to 10 GPa (Giga Pascal).

[0249] The organic material portion of the second portion 131a2 may include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having flexibility compared to the inorganic material portion of the first portion 131a1. For example, the second portion 131a2 may be expressed as a flexible adhesive portion, an elastic portion, a bending portion, a damping portion, or a soft portion, but the embodiments of the present specification are not limited thereto.

[0250] The piezoelectric vibrating part 131a according to the embodiments of the present specification may have the shape of a single thin film by arranging (or connecting) a plurality of first portions 131a1 and second portions 131a2 on the same plane. For example, the piezoelectric vibrating part 131a may have a structure in which a plurality of first portions 131a1 are connected to one side. For example, the plurality of first portions 131a1 may have a structure in which the entire piezoelectric vibrating part 131a is connected to each other via the second portions 131a2. For example, the piezoelectric vibrating part 131a may vibrate in the vertical direction due to the first portions 131a1 having vibration characteristics, and may bend into a curved shape due to the second portions 131a2 having flexibility. Furthermore, in the piezoelectric vibrating part 131a according to the embodiments of the present specification, the size of the first portions 131a1 and the size of the second portions 131a2 may be set according to the piezoelectric characteristics and flexibility required for the piezoelectric vibrating part 131a or the vibration element 131. In one embodiment of the present specification, in the case of piezoelectric vibrating part 131a that requires piezoelectric characteristics more than flexibility, the size of first part 131a1 may be configured to be larger than the size of second part 131a2. In another embodiment of the present specification, in the case of piezoelectric vibrating part 131a that requires flexibility more than piezoelectric characteristics, the size of second part 131a2 may be configured to be larger than the size of first part 131a1. Therefore, since the size of piezoelectric vibrating part 131a can be adjusted according to the required characteristics, there is an advantage in that the design of piezoelectric vibrating part 131a is easy.

[0251] The first electrode unit 131b may be disposed on the first surface (or upper surface) of the piezoelectric vibrating unit 131a. The first electrode unit 131b may be commonly disposed on or coupled to the first surfaces of the first portions 131a1 and the second portions 131a2, and may be electrically connected to the first surfaces of the first portions 131a1. For example, the first electrode unit 131b may have the shape of a single electrode (or one electrode) disposed over the entire first surface of the piezoelectric vibrating unit 131a. For example, the first electrode unit 131b may have substantially the same shape as the piezoelectric vibrating unit 131a, although the embodiments of the present specification are not limited thereto.

[0252] The first electrode unit 131b according to an embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include, but is not limited to, ITO (indium tin oxide) or IZO (indium zinc oxide). The opaque conductive material may include, but is not limited to, aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), magnesium (Mg), or an alloy thereof.

[0253] The second electrode unit 131c may be disposed on a second surface (or rear surface) different from (or opposite to) the first surface of the piezoelectric vibrating unit 131a. The second electrode unit 131c may be commonly disposed on or coupled to the second surface of each of the first portions 131a1 and the second surface of each of the second portions 131a2, and may be electrically connected to the second surface of each of the first portions 131a1. For example, the second electrode unit 131c may have the shape of a single electrode (or one electrode) disposed over the entire second surface of the piezoelectric vibrating unit 131a. For example, the second electrode unit 131c may have the same shape as the piezoelectric vibrating unit 131a, although the embodiment of the present specification is not limited thereto. The second electrode unit 131c according to an embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode portion 131c may be made of the same material as the first electrode portion 131b, but the embodiments herein are not limited thereto. In other embodiments herein, the second electrode portion 131c may be made of a different material than the first electrode portion 131b.

[0254] The piezoelectric vibrating part 131a may be polarized by a constant voltage applied to the first electrode part 131b and the second electrode part 131c in a constant temperature atmosphere or in a temperature atmosphere that changes from high temperature to room temperature, but the embodiments of the present specification are not limited thereto. For example, the piezoelectric vibrating part 131a may vibrate by alternately repeating contraction and / or expansion due to the inverse piezoelectric effect caused by an acoustic signal (or voice signal or drive signal) externally applied to the first electrode part 131b and the second electrode part 131c. For example, the piezoelectric vibrating part 131a may vibrate by vibration in the vertical direction (or thickness direction) (d33) and vibration in the planar direction (d31) due to the acoustic signal applied to the first electrode part 131b and the second electrode part 131c. The piezoelectric vibrating part 131a may increase the displacement of the vibrating member (or diaphragm, or vibrating object) by contracting and / or expanding in the planar direction, thereby further improving the vibration of the vibrating member.

[0255] The vibration element 131 according to an embodiment of the present specification may further include a first cover member 131d and a second cover member 131e.

[0256] The first cover member 131d may be disposed on a first surface of the vibration element 131. For example, the first cover member 131d may be configured to cover the first electrode portion 131b. Thus, the first cover member 131d can protect the first electrode portion 131b and / or the piezoelectric vibration portion 131a.

[0257] The second cover member 131e may be disposed on a second surface of the vibration element 131. For example, the second cover member 131e may be configured to cover the second electrode portion 131c. Thus, the second cover member 131e can protect the second electrode portion 131c and / or the piezoelectric vibration portion 131a.

[0258] In one embodiment of the present specification, the first cover member 131d and the second cover member 131e may each include one or more materials selected from the group consisting of plastic, fiber, and wood, but the present specification is not limited thereto. For example, the first cover member 131d and the second cover member 131e may each include the same or different materials. For example, the first cover member 131d and the second cover member 131e may each be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the present specification is not limited thereto.

[0259] The first cover member 131d according to an embodiment of the present specification may be connected or bonded to the first electrode portion 131b via the first adhesive layer 131f. For example, the first cover member 131d may be connected or bonded to the first electrode portion 131b by a film lamination process using the first adhesive layer 131f as an intermediary.

[0260] The second cover member 131e according to an embodiment of the present specification may be connected or bonded to the second electrode portion 131c via the second adhesive layer 131g. For example, the second cover member 131e may be connected or bonded to the second electrode portion 131c by a film lamination process using the second adhesive layer 131g as an intermediary.

[0261] The first adhesive layer 131f may be disposed between the first electrode portion 131b and the first cover member 131d. The second adhesive layer 131g may be disposed between the second electrode portion 131c and the second cover member 131e. For example, the first adhesive layer 131f and the second adhesive layer 131g may be configured between the first cover member 131d and the second cover member 131e so as to completely surround the piezoelectric vibration portion 131a, the first electrode portion 131b, and the second electrode portion 131c. For example, the piezoelectric vibration portion 131a, the first electrode portion 131b, and the second electrode portion 131c may be embedded or built-in between the first adhesive layer 131f and the second adhesive layer 131g.

[0262] Each of the first adhesive layer 131f and the second adhesive layer 131g according to the embodiment of the present specification may include an electrically insulating material that is compressible and resilient while having adhesive properties. For example, each of the first adhesive layer 131f and the second adhesive layer 131g may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, but the embodiment of the present specification is not limited thereto.

[0263] Either the first cover member 131d or the second cover member 131e can be attached or coupled to the vibrating member (or diaphragm, or vibrating object) via an adhesive member.

[0264] According to one embodiment of the present specification, either the first cover member 131d or the second cover member 131e may be attached or coupled to the vibrating member 110 (or the vibrating plate, or the vibrating object) via an adhesive member 120, as described with reference to Figures 1 to 13.

[0265] The vibrating element 131 according to an embodiment of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad part 131p.

[0266] The first power supply line (PL1) may be disposed between the first electrode portion 131b and the first cover member 131d and electrically connected to the first electrode portion 131b. For example, the first power supply line (PL1) may be disposed on the first cover member 131d. The first power supply line (PL1) may extend long along the second direction (Y) and be electrically connected to a central portion of the first electrode portion 131b. In one embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode portion 131b via an anisotropic conductive film. In another embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode portion 131b via a conductive material (or particles) contained in the first adhesive layer 131f.

[0267] The second power supply line (PL2) may be disposed between the second electrode portion 131c and the second cover member 131e and electrically connected to the second electrode portion 131c. For example, the second power supply line (PL2) may be disposed on the second cover member 131e. The second power supply line (PL2) may extend long along the second direction (Y) and be electrically connected to a central portion of the second electrode portion 131c. In one embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode portion 131c via an anisotropic conductive film. In another embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode portion 131c via a conductive material (or particles) contained in the second adhesive layer 131g. For example, the second power supply line (PL2) may not overlap with the first power supply line (PL1). When the second power supply line (PL2) is arranged so as not to overlap with the first power supply line (PL1), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) can be prevented.

[0268] The pad portion 131p may be configured to be connected to the first power supply line (PL1) and the second power supply line (PL2). The pad portion 131p may be configured on an edge portion of one side of either the first cover member 131d or the second cover member 131e so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2).

[0269] The pad part 131p according to one embodiment of the present specification may include a first pad electrode electrically connected to one end of the first power supply line (PL1) and a second pad electrode electrically connected to one end of the second power supply line (PL2).

[0270] The first pad electrode may be disposed on an edge portion on one side of either the first cover member 131d or the second cover member 131e and may be connected to one end of the first power supply line (PL1). For example, the first pad electrode may pass through either the first cover member 131d or the second cover member 131e and be electrically connected to one end of the first power supply line (PL1).

[0271] The second pad electrode may be disposed next to the first pad electrode and may be connected to one end of the second power supply line (PL2). For example, the second pad electrode may pass through either the first cover member 131d or the second cover member 131e and be electrically connected to one end of the second power supply line (PL2).

[0272] According to an embodiment of the present specification, each of the first power supply line (PL1), the second power supply line (PL2), and the pad portion 131p may be configured to be transparent, semi-transparent, or opaque.

[0273] The pad portion 131 p according to an embodiment of the present disclosure may be electrically connected to the signal cable 132 .

[0274] The signal cable 132 is electrically connected to the pad portion 131p arranged on the vibration element 131, and can supply a vibration drive signal (or an audio signal or a voice signal) provided from an audio processing circuit (or a vibration drive circuit) to the vibration element 131. The signal cable 132 according to an embodiment of the present specification may include a first terminal electrically connected to a first pad electrode of the pad portion 131p and a second terminal electrically connected to a second pad electrode of the pad portion 131p. For example, the signal cable 132 may be formed of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and the embodiment of the present specification is not limited thereto.

[0275] The acoustic processing circuit can generate AC vibration drive signals including a first vibration drive signal and a second vibration drive signal based on acoustic data supplied from an external acoustic data generating circuit. The first vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal, and the second vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal. For example, the first vibration drive signal can be supplied to the first electrode portion 131b via a first terminal of the signal cable 132, a first pad electrode of the pad portion 131p, and a first power supply line (PL1). The second vibration drive signal can be supplied to the second electrode portion 131c via a second terminal of the signal cable 132, a second pad electrode of the pad portion 131p, and a second power supply line (PL2).

[0276] According to one embodiment of the present disclosure, the signal cable 132 may be configured to be transparent, translucent, or opaque.

[0277] The vibration element 131 according to one embodiment of the present specification can be realized in a thin film shape by alternately connecting first portions 131a1 having piezoelectric properties and second portions 131a2 having flexibility. This allows the vibration element 131 to be bent into a shape corresponding to the shape of the vibration member or the vibration target. For example, when the vibration element 131 is connected or bonded to a vibration member having various curved portions via an adhesive member, the vibration element 131 can be bent into a curved shape along the shape of the curved portions of the vibration member 110. Even when bent into a curved shape, the vibration element 131 does not suffer from damage, breakage, or other degradation in reliability.

[0278] 20A to 20D are perspective views showing piezoelectric vibrating parts according to other examples of the present specification, each showing a piezoelectric vibrating part according to another example.

[0279] Referring to FIG. 20A, a piezoelectric vibration part 131a according to another embodiment of the present specification may include a plurality of first parts 131a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second part (or one or more second parts) 131a2 arranged between the plurality of first parts 131a1.

[0280] The plurality of first portions 131a1 may be arranged to be spaced apart from one another in the first direction (X) and the second direction (Y). For example, the plurality of first portions 131a1 may have hexahedral shapes of the same size and be arranged in a lattice pattern. Each of the plurality of first portions 131a1 may be made of substantially the same piezoelectric material as the first portion 131a1 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0281] The second portions 131a2 may be disposed between the first portions 131a1 along each of the first direction (X) and the second direction (Y). The second portions 131a2 may be connected to or bonded to the adjacent first portions 131a1 by filling the gap between two adjacent first portions 131a1 or by surrounding each of the first portions 131a1. According to one embodiment of the present specification, the width of the second portions 131a2 disposed between two adjacent first portions 131a1 along the first direction (X) may be the same as or different from the width of the first portions 131a1, and the width of the second portions 131a2 disposed between two adjacent first portions 131a1 along the second direction (Y) may be the same as or different from the width of the first portions 131a1. The second portion 131a2 may be made of substantially the same organic material as the second portion 131a2 described with reference to Figures 17 to 19, and therefore the same reference numerals will be used to denote the second portion 131a2, and redundant description thereof will be omitted.

[0282] The piezoelectric vibrating part 131a according to the other embodiments of this specification may have a resonant frequency of 30 MHz or less by including a 1-3 composite structure having piezoelectric characteristics of the 1-3 vibration mode, but the embodiments of this specification are not limited thereto. For example, the resonant frequency of the piezoelectric vibrating part 131a may be changed depending on at least one of the shape, length, and thickness.

[0283] Referring to FIG. 20B, a piezoelectric vibration part 131a according to another embodiment of the present specification may include a plurality of first parts 131a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second part (or one or more second parts) 131a2 arranged between the plurality of first parts 131a1.

[0284] Each of the plurality of first portions 131a1 may have a circular planar structure. For example, each of the plurality of first portions 131a1 may have a disk shape, although embodiments of the present specification are not limited thereto. For example, each of the plurality of first portions 131a1 may have a dot shape, including an oval shape, a polygonal shape, or a doughnut shape. Each of the plurality of first portions 131a1 may be made of substantially the same piezoelectric material as the first portion 131a1 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0285] The second portion 131a2 may be disposed between the first portions 131a1 along each of the first direction (X) and the second direction (Y). The second portion 131a2 may be configured to surround each of the first portions 131a1, and thereby connected to or bonded to each side of the first portions 131a1. The first portions 131a1 and the second portions 131a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 131a2 may be made of substantially the same organic material as the second portion 131a2 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used to denote the second portion 131a2, and redundant description thereof will be omitted.

[0286] Referring to FIG. 20C, in a vibration element 131 according to another embodiment of the present specification, the piezoelectric vibration part 131a may include a plurality of first portions 131a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 131a2 arranged between the plurality of first portions 131a1.

[0287] Each of the plurality of first portions 131a1 may have a triangular planar structure. For example, each of the plurality of first portions 131a1 may have a triangular plate shape. Each of the plurality of first portions 131a1 may be made of substantially the same piezoelectric material as the first portion 131a1 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used to denote the same piezoelectric material, and redundant description thereof will be omitted.

[0288] According to one embodiment of the present specification, four adjacent first portions 131a1 among the plurality of first portions 131a1 may be arranged adjacent to each other to form a square shape (or a regular square shape). Each vertex of the four adjacent first portions 131a1 forming the square shape may be arranged adjacent to the center (or the exact center) of the square shape.

[0289] The second portion 131a2 may be disposed between the first portions 131a1 along each of the first direction (X) and the second direction (Y). The second portion 131a2 may be configured to surround each of the first portions 131a1, and thereby connected to or bonded to each side of the first portions 131a1. The first portions 131a1 and the second portions 131a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 131a2 may be made of substantially the same organic material as the second portion 131a2 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used to denote the second portion 131a2, and redundant description thereof will be omitted.

[0290] Referring to FIG. 20D, in a vibration element 131 according to another embodiment of the present specification, the piezoelectric vibration part 131a may include a plurality of first portions 131a1 spaced apart from each other along a first direction (X) and a second direction (Y), and a second portion (or one or more second portions) 131a2 arranged between the plurality of first portions 131a1.

[0291] Each of the plurality of first portions 131a1 may have a triangular planar structure. For example, each of the plurality of first portions 131a1 may have a triangular plate shape. Each of the plurality of first portions 131a1 may be made of substantially the same piezoelectric material as the first portion 131a1 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used to denote the same piezoelectric material, and redundant description thereof will be omitted.

[0292] According to one embodiment of the present specification, six adjacent first portions 131a1 among the plurality of first portions 131a1 may be arranged adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). Each vertex of the six adjacent first portions 131a1 forming the hexagonal shape may be arranged adjacent to the center (or the exact center) of the hexagonal shape.

[0293] The second portion 131a2 may be disposed between the first portions 131a1 along each of the first direction (X) and the second direction (Y). The second portion 131a2 may be configured to surround each of the first portions 131a1, and thereby connected to or bonded to each side of the first portions 131a1. The first portions 131a1 and the second portions 131a2 may be disposed (or arranged) side by side on the same plane (or the same layer). For example, the second portion 131a2 may be substantially made of an organic material as the second portion 131a2 described with reference to FIGS. 17 to 19, and therefore the same reference numerals will be used to denote the second portion 131a2, and redundant description thereof will be omitted.

[0294] Fig. 21 is a diagram showing a vibration element according to another embodiment of the present specification. Fig. 22 is a cross-sectional view taken along line E-E' shown in Fig. 21. Figs. 21 and 22 are diagrams showing another embodiment of the vibration element shown in one or more of Figs. 1 to 13.

[0295] 21 and 22, a vibration element 131 according to another embodiment of the present specification may include first and second vibration parts 131-1 and 131-2.

[0296] The first and second vibration generating units 131-1 and 131-2 may be electrically separated and spaced apart from each other along the first direction (X). The first and second vibration generating units 131-1 and 131-2 may vibrate by alternately or repeatedly contracting and / or expanding due to the piezoelectric effect. For example, the first and second vibration generating units 131-1 and 131-2 may be arranged at a fixed interval (SD1) along the first direction (X) or tiled. Thus, the vibration element 131, in which the first and second vibration generating units 131-1 and 131-2 are tiled, may be a vibration array, a vibration array unit, a vibration module array unit, a vibration array structure, a tiled vibration array, a tiled vibration array module, or a tiled vibration film, although the embodiments of the present specification are not limited thereto.

[0297] Each of the first and second vibration generating units 131-1 and 131-2 according to the embodiments of the present specification may have a rectangular shape. For example, each of the first and second vibration generating units 131-1 and 131-2 may have a rectangular shape with a width of 5 cm or more. For example, each of the first and second vibration generating units 131-1 and 131-2 may have a square shape with a size of 5 cm x 5 cm or more, but the embodiments of the present specification are not limited thereto.

[0298] The first and second vibration generating units 131-1, 131-2 are arranged on the same plane or tiled, so that the vibration element 131 can be enlarged in area by tiling the first and second vibration generating units 131-1, 131-2, which have relatively small sizes.

[0299] The first and second vibration generating units 131-1 and 131-2 may be arranged at a fixed interval (SD1) or tiled to be realized as a single vibration device (or a single vibration device) that is not driven independently but driven as a complete single unit. According to one embodiment of the present specification, the first separation distance (or first distance, or first interval) (SD1) between the first and second vibration generating units 131-1 and 131-2 in the first direction (X) may be 0.1 mm or more and less than 3 cm, but the embodiment of the present specification is not limited thereto.

[0300] According to one embodiment of the present specification, the first and second vibration generating units 131-1 and 131-2 may be arranged or tiled to have a separation distance (or gap) (SD1) of 0.1 mm or more and less than 3 cm, so that they can be driven as a single vibration device, and the reproduction band and sound pressure characteristics of the sound generated in conjunction with the single-body vibration of the first and second vibration generating units 131-1 and 131-2 may be increased. For example, in order to increase the reproduction band of the sound generated in conjunction with the single-body vibration of the first and second vibration generating units 131-1 and 131-2 and to increase the sound pressure characteristics of low-frequency sound, for example, at or below 500 Hz, the first and second vibration generating units 131-1 and 131-2 may be arranged with a gap (SD1) of 0.1 mm or more and less than 5 mm.

[0301] According to one embodiment of the present specification, when the first and second vibration generating units 131-1, 131-2 are arranged with a gap (SD1) of less than 0.1 mm or no gap (SD1), the reliability of the first and second vibration generating units 131-1, 131-2 or the vibration element 131 may be reduced due to cracks or damage caused by physical contact between them when the first and second vibration generating units 131-1, 131-2 vibrate.

[0302] According to one embodiment of the present specification, when the first and second vibration generating units 131-1 and 131-2 are arranged with a distance (SD1) of 3 cm or more, the first and second vibration generating units 131-1 and 131-2 may not be driven as a single vibration device due to their independent vibrations. This may result in a reduction in the reproduction band and sound pressure characteristics of the sound generated by the vibrations of the first and second vibration generating units 131-1 and 131-2. For example, when the first and second vibration generating units 131-1 and 131-2 are arranged with a distance (SD1) of 3 cm or more, the acoustic characteristics and sound pressure characteristics in the low frequency range, for example, below 500 Hz, may be reduced.

[0303] According to one embodiment of the present specification, when the first and second vibration generating units 131-1, 131-2 are arranged at a distance (SD1) of 5 mm, the first and second vibration generating units 131-1, 131-2 are not driven as a single vibration device, and therefore the acoustic characteristics and sound pressure characteristics may be reduced in the low frequency range, for example, below 200 Hz.

[0304] According to another embodiment of the present specification, when the first and second vibration generating units 131-1 and 131-2 are arranged with a distance (SD1) of 1 mm between them, the first and second vibration generating units 131-1 and 131-2 vibrate as a single vibration device, thereby increasing the sound reproduction band and increasing the sound pressure characteristics of low-frequency sounds, for example, at frequencies below 500 Hz. For example, when the first and second vibration generating units 131-1 and 131-2 are arranged with a distance (SD1) of 1 mm between them, the vibration element 131 can be realized as a large-area vibrating body by optimizing the separation distance between the first and second vibration generating units 131-1 and 131-2. As a result, the first and second vibration generating units 131-1 and 131-2 can be driven as a large-area vibrating body by single-body vibration, and as a result, the acoustic characteristics and sound pressure characteristics of the reproduction band and low-frequency band of the sound generated in conjunction with the large-area vibration of the vibration element 131 can be increased or improved.

[0305] Therefore, in order to realize single-body vibration (or one vibration device) of the first and second vibration generating units 131-1 and 131-2, the separation distance (SD1) between the first and second vibration generating units 131-1 and 131-2 may be set to 0.1 mm or more and less than 3 cm. Also, in order to realize single-body vibration (or one vibration device) of the first and second vibration generating units 131-1 and 131-2 and increase the sound pressure characteristics of the bass band sound, the separation distance (SD1) between the first and second vibration generating units 131-1 and 131-2 may be set to 0.1 mm or more and less than 5 mm.

[0306] Each of the first and second vibration generating units 131-1 and 131-2 according to an embodiment of the present specification may include a piezoelectric vibration unit 131a, a first electrode unit 131b, and a second electrode unit 131c.

[0307] The piezoelectric vibrating parts 131a of the first and second vibration generating parts 131-1 and 131-2 may include a piezoelectric material (or an electroactive material) having a piezoelectric effect. For example, the piezoelectric vibrating parts 131a of the first and second vibration generating parts 131-1 and 131-2 may be configured substantially the same as any of the piezoelectric vibrating parts 131a described with reference to Fig. 19 and Figs. 20A to 20D, and therefore the same reference numerals will be used to denote the same parts, and redundant description thereof will be omitted.

[0308] According to one embodiment of the present specification, each of the first and second vibration generating units 131-1, 131-2 may include any of the piezoelectric vibration units 131a described with reference to Figure 19 and Figures 20A to 20D, or may include piezoelectric vibration units 131a that are different from each other.

[0309] The first electrode portion 131b may be disposed on a first surface of the piezoelectric vibrating portion 131a and electrically connected to the first surface of the piezoelectric vibrating portion 131a. The first electrode portion 131b is substantially the same as the first electrode portion 131b described with reference to FIG. 18, and therefore the same reference numerals are used to denote the first electrode portion 131b, and redundant description thereof will be omitted.

[0310] The second electrode portion 131c may be disposed on a second surface of the piezoelectric vibrating portion 131a and electrically connected to the second surface of the piezoelectric vibrating portion 131a. The second electrode portion 131c is substantially the same as the second electrode portion 131c described with reference to FIG. 18, and therefore the same reference numerals are used to denote the second electrode portion 131c, and redundant description thereof will be omitted.

[0311] The vibration element 131 according to other embodiments of the present specification may further include a first cover member 131d and a second cover member 131e.

[0312] The first cover member 131d can be disposed on the first surface of the vibration element 131. For example, the first cover member 131d can be commonly connected to the first surfaces of the first and second vibration generating units 131-1 and 131-2 or commonly support the first surfaces of the first and second vibration generating units 131-1 and 131-2 by covering the first electrode units 131b disposed on the first surfaces of the first and second vibration generating units 131-1 and 131-2. This allows the first cover member 131d to protect the first surfaces or the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2.

[0313] The second cover member 131e can be disposed on the second surface of the vibration element 131. For example, the second cover member 131e can be commonly connected to the second surfaces of the first and second vibration generating units 131-1 and 131-2 or commonly support the second surfaces of the first and second vibration generating units 131-1 and 131-2 by covering the second electrode units 131c disposed on the second surfaces of the first and second vibration generating units 131-1 and 131-2. This allows the second cover member 131e to protect the second surfaces or the second electrode units 131c of the first and second vibration generating units 131-1 and 131-2.

[0314] In one embodiment of the present specification, the first cover member 131d and the second cover member 131e may each include one or more of plastic, fiber, and wood, but the embodiment of the present specification is not limited thereto. For example, the first cover member 131d and the second cover member 131e may each include the same or different materials. For example, the first cover member 131d and the second cover member 131e may each be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0315] The first cover member 131d according to one embodiment of the present specification can be disposed on the first surfaces of the first and second vibration generating units 131-1 and 131-2 via the first adhesive layer 131f. For example, the first cover member 131d can be disposed directly on the first surfaces of the first and second vibration generating units 131-1 and 131-2 by a film lamination process using the first adhesive layer 131f as an intermediary. Therefore, the first and second vibration generating units 131-1 and 131-2 can be integrated with (or disposed on) or tiled to the first cover member 131d so as to have a constant spacing (SD1).

[0316] The second cover member 131e according to one embodiment of the present specification may be disposed on the second surfaces of the first and second vibration generating units 131-1 and 131-2 via the second adhesive layer 131g. For example, the second cover member 131e may be disposed directly on the second surfaces of the first and second vibration generating units 131-1 and 131-2 by a film lamination process using the second adhesive layer 131g as an intermediary. Therefore, the first and second vibration generating units 131-1 and 131-2 may be integrated with (or disposed on) or tiled to the second cover member 131e so as to have a constant spacing (SD1). For example, the vibration element 131 may be realized with a single film by using the first cover member 131d and the second cover member 131e.

[0317] The first adhesive layer 131f may be disposed between the first and second vibration generating units 131-1 and 131-2 and on the first surfaces of the first and second vibration generating units 131-1 and 131-2. For example, the first adhesive layer 131f may be formed on the back surface (or inner surface) of the first cover member 131d that faces the first surfaces of the first and second vibration generating units 131-1 and 131-2, filling the space between the first and second vibration generating units 131-1 and 131-2, and being disposed between the first cover member 131d and the first surfaces of the first and second vibration generating units 131-1 and 131-2.

[0318] The second adhesive layer 131g may be disposed between the first and second vibration generating units 131-1 and 131-2 and on the second surfaces of the first and second vibration generating units 131-1 and 131-2. For example, the second adhesive layer 131g may be formed on the front surface (or inner surface) of the second cover member 131e facing the second surfaces of the first and second vibration generating units 131-1 and 131-2, filling the space between the first and second vibration generating units 131-1 and 131-2, and disposed between the second surfaces of the first and second vibration generating units 131-1 and 131-2 and the second cover member 131e.

[0319] The first and second adhesive layers 131f and 131g may be interconnected or bonded between the first and second vibration generating units 131-1 and 131-2. This allows the first and second vibration generating units 131-1 and 131-2 to be surrounded by the first and second adhesive layers 131f and 131g, respectively. For example, the first and second adhesive layers 131f and 131g may be configured between the first cover member 131d and the second cover member 131e so as to completely surround the first and second vibration generating units 131-1 and 131-2, respectively. For example, the first and second vibration generating units 131-1 and 131-2 may be embedded or built-in between the first adhesive layer 131f and the second adhesive layer 131g.

[0320] According to an embodiment of the present specification, each of the first and second adhesive layers 131f and 131g may include an electrically insulating material that is compressible and resilient while maintaining adhesive properties. For example, each of the first and second adhesive layers 131f and 131g may include epoxy resin, acrylic resin, silicone resin, or urethane resin, although the present specification is not limited thereto. For example, each of the first and second adhesive layers 131f and 131g may be configured to be transparent, translucent, or opaque.

[0321] A vibrating element 131 according to another embodiment of the present specification may further include a first power supply line (PL1), a second power supply line (PL2), and a pad part 131p.

[0322] The first power supply line (PL1) may be arranged on the first cover member 131d. For example, the first power supply line (PL1) may be arranged on a rear surface of the first cover member 131d facing the first surfaces of the first and second vibration generating units 131-1 and 131-2. The first power supply line (PL1) may be electrically connected to the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2. For example, the first power supply line (PL1) may be directly connected to the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2. In one embodiment of the present specification, the first power supply line (PL1) may be electrically connected to the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2 via an anisotropic conductive film. In another embodiment of the present specification, the first power supply line (PL1) may be electrically connected to each of the first electrode parts 131b of the first and second vibration generating parts 131-1 and 131-2 via a conductive material (or particles) contained in the first adhesive layer 131f.

[0323] The first power supply line (PL1) according to an embodiment of the present specification may include first and second upper power lines (PL11, PL12) arranged along the second direction (Y). For example, the first upper power line (PL11) may be connected to or directly electrically connected to the first electrode unit 131b of the first vibration generating unit 131-1. The second upper power line (PL12) may be connected to or directly electrically connected to the first electrode unit 131b of the second vibration generating unit 131-2.

[0324] The second power supply line (PL2) may be arranged on the second cover member 131e. For example, the second power supply line (PL2) may be arranged on the front surface of the second cover member 131e facing the second surfaces of the first and second vibration generating units 131-1 and 131-2. The second power supply line (PL2) may be electrically connected to the second electrode units 131c of the first and second vibration generating units 131-1 and 131-2. For example, the second power supply line (PL2) may be directly connected to the second electrode units 131c of the first and second vibration generating units 131-1 and 131-2. In one embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode units 131c of the first and second vibration generating units 131-1 and 131-2 via an anisotropic conductive film. In another embodiment of the present specification, the second power supply line (PL2) may be electrically connected to the second electrode units 131c of the first and second vibration generating units 131-1 and 131-2 via a conductive material (or particles) contained in the second adhesive layer 131g.

[0325] The second power supply line (PL2) according to an embodiment of the present specification may include first and second lower power lines (PL21, PL22) arranged along the second direction (Y). For example, the first lower power line (PL21) may be connected to or electrically directly connected to the second electrode unit 131c of the first vibration generating unit 131-1. For example, the first lower power line (PL21) may overlap the first upper power line (PL11). For example, the first lower power supply line (PL21) may not overlap the first upper power supply line (PL11). If the first lower power supply line (PL21) is arranged so as not to overlap the first upper power supply line (PL11), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) may be prevented. The second lower power supply line (PL22) may be connected to or electrically connected directly to the second electrode unit 131c of the second vibration generating unit 131-2. For example, the second lower power supply line (PL22) may overlap with the second upper power supply line (PL12). For example, the second lower power supply line (PL22) may not overlap with the second upper power supply line (PL12). If the second lower power supply line (PL22) is arranged so as not to overlap with the second upper power supply line (PL12), a short circuit between the first power supply line (PL1) and the second power supply line (PL2) may be prevented.

[0326] The pad portion 131p may be configured to be electrically connected to the first power supply line (PL1) and the second power supply line (PL2). The pad portion 131p may be configured on an edge portion of one side of either the first cover member 131d or the second cover member 131e so as to be electrically connected to one side (or one end) of each of the first power supply line (PL1) and the second power supply line (PL2).

[0327] The pad part 131p according to one embodiment of the present specification may include a first pad electrode electrically connected to one end of the first power supply line (PL1) and a second pad electrode electrically connected to one end of the second power supply line (PL2).

[0328] The first pad electrode may be commonly connected to one end of each of the first and second upper power lines (PL11, PL12) of the first power supply line (PL1). For example, one end of each of the first and second upper power lines (PL11, PL12) may branch off from the first pad electrode. The second pad electrode may be commonly connected to one end of each of the first and second lower power lines (PL21, PL22) of the second power supply line (PL2). For example, one end of each of the first and second lower power lines (PL21, PL22) may branch off from the second pad electrode.

[0329] The vibration element 131 according to another embodiment of the present specification may further include a signal cable 132 .

[0330] The signal cable 132 is electrically connected to the pad portion 131p arranged on the vibration element 131, and can supply a vibration drive signal (or an acoustic signal or a voice signal) provided from the sound processing circuit to the vibration element 131. The signal cable 132 according to an embodiment of the present specification may include a first terminal electrically connected to a first pad electrode of the pad portion 131p and a second terminal electrically connected to a second pad electrode of the pad portion 131p. For example, the signal cable 132 may be formed of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and the embodiment of the present specification is not limited thereto.

[0331] The acoustic processing circuit can generate AC vibration drive signals including a first vibration drive signal and a second vibration drive signal based on the acoustic data. The first vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal, and the second vibration drive signal can be either a positive (+) vibration drive signal or a negative (-) vibration drive signal. For example, the first vibration drive signal can be supplied to the first electrode portion 131b of each of the first and second vibration generating units 131-1 and 131-2 via a first terminal of the signal cable 132, a first pad electrode of the pad portion 131p, and a first power supply line (PL1). The second vibration drive signal can be supplied to the second electrode portion 131c of each of the first and second vibration generating units 131-1 and 131-2 via a second terminal of the signal cable 132, a second pad electrode of the pad portion 131p, and a second power supply line (PL2).

[0332] 17 to 19, the vibration element 131 according to other embodiments of the present specification can be realized in a thin film shape, which allows it to be bent into a shape corresponding to the shape of the vibration member or the vibration target, making it possible to easily vibrate a vibration member including various curved surfaces, and improving the acoustic characteristics and / or sound pressure characteristics in the low frequency range generated by the vibration of the vibration member. Furthermore, the vibration element 131 according to other embodiments of the present specification includes first and second vibration generating units 131-1 and 131-2 arranged (or tiled) at a fixed interval (SD1) so as to be realized as one single vibrating body without being driven independently, and can be driven as a large-area vibrating body by the single-body vibration of the first and second vibration generating units 131-1 and 131-2.

[0333] FIG. 23 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 23 shows the vibration element shown in FIGS. 21 and 22 configured with four vibration generating units. Therefore, hereinafter, except for the four vibration generating units and the related components, the remaining same components are denoted by the same reference numerals, and redundant explanations thereof may be omitted or simplified. The cross section of line E-E' shown in FIG. 23 is shown in FIG. 22.

[0334] Combining FIG. 23 with FIG. 22, a vibration element 131 according to another embodiment of the present specification may include a plurality of vibration generating units 131-1, 131-2, 131-3, and 131-4.

[0335] The vibration generating units 131-1, 131-2, 131-3, and 131-4 may be arranged electrically separated from one another along the first direction (X) and the second direction (Y). For example, the vibration generating units 131-1, 131-2, 131-3, and 131-4 may be arranged or tiled in an i×j pattern on the same plane, thereby allowing the vibration element 131 to have a large area by tiling the vibration generating units 131-1, 131-2, 131-3, and 131-4, each having a relatively small size. For example, i is the number of vibration generating units arranged along the first direction (X) and may be a natural number of 2 or greater, and j is the number of vibration generating units arranged along the second direction (Y) and may be the same as or different from i. For example, each of the plurality of vibration generating units 131-1, 131-2, 131-3, and 131-4 may be arranged or tiled in a 2×2 pattern, but the embodiments of this specification are not limited thereto. In the following description, it is assumed that the vibration element 131 includes first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4.

[0336] According to one embodiment of the present specification, the first and second vibration generating units 131-1 and 131-2 may be spaced apart from each other along the first direction (X). The third and fourth vibration generating units 131-3 and 131-4 may be spaced apart from each other along the first direction (X) and from the first and second vibration generating units 131-1 and 131-2 along the second direction (Y). The first and third vibration generating units 131-1 and 131-3 may face each other and be spaced apart from each other along the second direction (Y). The second and fourth vibration generating units 131-2 and 131-4 may face each other and be spaced apart from each other along the second direction (Y).

[0337] The first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may be disposed between the first cover member 131d and the second cover member 131e. For example, the first cover member 131d and the second cover member 131e may connect the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 or commonly support them, thereby driving the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 as a single vibration device (or a single vibration device). For example, the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may be tiled at regular intervals on the cover members 131d and 131e, so that they can be driven as a single vibration device (or a single vibration device).

[0338] According to one embodiment of the present specification, as described with reference to Figures 21 and 22, the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may be arranged (or tiled) at intervals of 0.1 mm or more and less than 3 cm along each of the first direction (X) and the second direction (Y) for complete single-body vibration or large-area vibration, and more preferably at intervals of 0.1 mm or more and less than 5 mm.

[0339] Each of the first to fourth vibration generating sections 131-1, 131-2, 131-3, and 131-4 can include a piezoelectric vibration section 131a, a first electrode section 131b, and a second electrode section 131c.

[0340] The piezoelectric vibrating parts 131a of each of the first to fourth vibration generating parts 131-1, 131-2, 131-3, and 131-4 may include a piezoelectric material (or an electroactive material) having a piezoelectric effect. The piezoelectric vibrating parts 131a of each of the first to fourth vibration generating parts 131-1, 131-2, 131-3, and 131-4 are configured substantially the same as any of the piezoelectric vibrating parts 131a described with reference to Figure 19 and Figures 20A to 20D, so the same reference numerals will be used to denote them, and redundant description thereof will be omitted.

[0341] According to one embodiment of the present specification, each of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may include any of the piezoelectric vibration units 131a described with reference to Figure 19 and Figures 20A to 20D, or may include piezoelectric vibration units 131a that are different from each other.

[0342] According to other embodiments of the present specification, one or more of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may include different piezoelectric vibration units 131a from the piezoelectric vibration units 131a described with reference to Figure 19 and Figures 20A to 20D.

[0343] The first electrode portion 131b may be disposed on a first surface of the corresponding piezoelectric vibrating portion 131a and electrically connected to the first surface of the piezoelectric vibrating portion 131a. The first electrode portion 131b is substantially the same as the first electrode portion 131b described with reference to FIG. 30, and therefore the same reference numerals are used therefor, and redundant description will be omitted.

[0344] The second electrode portion 131c may be disposed on a second surface of the corresponding piezoelectric vibrating portion 131a and electrically connected to the second surface of the piezoelectric vibrating portion 131a. The second electrode portion 131c is substantially the same as the second electrode portion 131c described with reference to FIG. 30, and therefore the same reference numerals are used therefor, and redundant description will be omitted.

[0345] According to one embodiment of the present specification, the first and second adhesive layers 131f and 131g may be connected or bonded to each other between the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4. As a result, each of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 may be surrounded by the first and second adhesive layers 131f and 131g. For example, the first and second adhesive layers 131f and 131g may be formed between the first cover member 131d and the second cover member 131e so as to completely surround each of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4. For example, each of the first to fourth vibration generating sections 131-1, 131-2, 131-3, and 131-4 may be embedded or built in between the first adhesive layer 131f and the second adhesive layer 131g.

[0346] A vibrating element 131 according to another embodiment of the present specification may further include a first power supply line PL1, a second power supply line PL2, and a pad part 131p.

[0347] The first power supply line PL1 and the second power supply line PL2 are substantially the same as the first power supply line PL1 and the second power supply line PL2 described with reference to Figures 33 and 34, except for the electrical connection structure between the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4.Therefore, in the following explanation, only the electrical connection structure between the first power supply line PL1 and the second power supply line PL2 and the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 will be briefly described.

[0348] The first power supply line PL1 according to an embodiment of the present specification may include first and second upper power supply lines PL11 and PL12 arranged along the second direction (Y). For example, the first upper power supply line PL11 may be electrically connected to the first electrode units 131b of the first and third vibration generators 131-1 and 131-3 (or first group or first vibration generating group) among the first to fourth vibration generators 131-1, 131-2, 131-3, and 131-4, which are arranged in a first row parallel to the second direction (Y). The second upper power supply line PL12 may be electrically connected to the first electrode units 131b of the second and fourth vibration generating units 131-2, 131-4 (or the second group, or the second vibration generating group) arranged in a second row parallel to the second direction (Y) among the first to fourth vibration generating units 131-1, 131-2, 131-3, 131-4.

[0349] The second power supply line PL2 according to an embodiment of the present specification may include first and second lower power supply lines PL21 and PL22 arranged along the second direction (Y). For example, the first lower power supply line PL21 may be electrically connected to the second electrode units 131c of the first and third vibration generators 131-1 and 131-3 (or the first group or the first vibration generating group) among the first to fourth vibration generators 131-1, 131-2, 131-3, and 131-4, which are arranged in a first row parallel to the second direction (Y). The second lower power supply line PL22 may be electrically connected to the second electrode portions 131c of the second and fourth vibration generating units 131-2, 131-4 (or the second group, or the second vibration generating group) arranged in a second row parallel to the second direction (Y) among the first to fourth vibration generating units 131-1, 131-2, 131-3, 131-4.

[0350] The pad portion 131p may be formed on an edge portion of one side of either the first cover member 131d or the second cover member 131e so as to be electrically connected to one side (or one end) of the first power supply line PL1 and the second power supply line PL2, respectively. The pad portion 131p is substantially the same as the pad portion 131p described with reference to Figures 21 and 22, and therefore the same reference numerals will be used therefor, and redundant description will be omitted.

[0351] Such a vibration element 131 according to another embodiment of this specification has the same effects as the vibration element 131 described with reference to FIGS. 17 to 22, and therefore a duplicated description thereof will be omitted.

[0352] Fig. 24 is a plan view showing the vibration element of the vibration device shown in Fig. 14 to Fig. 16. Fig. 25 is a cross-sectional view taken along line FF' shown in Fig. 24.

[0353] Referring to Figures 24 and 25, the vibration device 230 according to other embodiments of the present specification may be expressed as a flexible vibration structure, flexible vibrator, flexible vibration generating element, flexible vibration generator, flexible sound generator, flexible sound element, flexible sound generating element, flexible sound generator, flexible actuator, flexible speaker, flexible piezoelectric speaker, film actuator, film-type piezoelectric composite actuator, film speaker, film-type piezoelectric speaker, or film-type piezoelectric composite speaker, and the embodiments of the present specification are not limited thereto.

[0354] The vibration device 230 may include one or more first to nth vibration elements 231-1 to 231-5 corresponding to the first to nth regions (A1 to A5) of the vibration member, respectively.

[0355] For the reasons described with reference to Figures 21 to 23, one or more of the first to nth vibration elements 231-1 to 231-5 can be arranged or tiled with spacing of 0.1 mm or more and less than 3 cm, or spacing of 0.1 mm or more and less than 5 mm, so that they can be driven by a single vibration device.

[0356] Each of the one or more first to n-th vibration elements 231-1 to 231-5 can include a vibration generating section having a piezoelectric vibration section 231a, a first electrode section 231b, and a second electrode section 231c.

[0357] The piezoelectric vibration portion 231a of each of the one or more 1st to nth vibration elements 231-1 to 231-5 may include a plurality of first portions 231a1 and second portions 231a2 between the plurality of first portions 231a1. For example, the piezoelectric vibration portion 231a of each of the one or more 1st to nth vibration elements 231-1 to 231-5 may include a plurality of first portions 231a1 and second portions 231a2 surrounding each side surface of the plurality of first portions 231a1.

[0358] In one or more first vibration elements 231-1, the multiple first portions 231a1 may be configured to have the same size (or diameter) and may be configured in a disk shape suitable for outputting the same ultrasonic wave. The second portion 231a2 may be configured to surround each side of the multiple disk-shaped first portions 231a1. For example, the piezoelectric vibration portion 231a of one or more first vibration elements 231-1 may be configured substantially the same as the piezoelectric vibration portion 131a shown in FIG. 20B, except that they are arranged in a row along the second direction (Y).

[0359] In one or more second vibration elements 231-2, the plurality of first portions 231a1 may have different widths along the first direction (X) and the same length along the second direction (Y), and may be arranged at regular intervals along the first direction (X). For example, the width of each of the plurality of first portions 231a1 may increase toward the middle region of the vibration member along the first direction (X). The second portions 231a2 may be configured to surround each side of the plurality of linear first portions 231a1. For example, the piezoelectric vibration portion 231a of one or more second vibration elements 231-2 may be configured substantially the same as the piezoelectric vibration portion 131a shown in FIG. 19, except that the piezoelectric vibration portion 231a has different widths along the first direction (X).

[0360] In one or more third vibration elements 231-3, the plurality of first portions 231a1 may have different widths along the first direction (X) and the same length along the second direction (Y), and may be arranged at regular intervals along the first direction (X). For example, the width of each of the plurality of first portions 231a1 may increase toward the middle region of the vibration member along the first direction (X). For example, the width of each of the plurality of first portions 231a1 may have a symmetrical structure with respect to a middle line of the vibration member parallel to the second direction (Y). The second portion 231a2 may be configured to surround each side of the plurality of linear first portions 231a1. For example, the piezoelectric vibration portion 231a of one or more third vibration elements 231-3 may be configured substantially the same as the piezoelectric vibration portion 131a shown in FIG. 19, except that the piezoelectric vibration portion 231a has different widths along the first direction (X).

[0361] In one or more fourth vibration elements 231-4, the plurality of first portions 231a1 may have different widths along the first direction (X) and the same length along the second direction (Y), and may be arranged at regular intervals along the first direction (X). For example, the width of each of the plurality of first portions 231a1 may increase toward the center region of the vibration member along the first direction (X). The second portions 231a2 may be configured to surround each side of the plurality of linear first portions 231a1. For example, the piezoelectric vibration portion 231a of one or more fourth vibration elements 231-4 may have a bilaterally symmetrical structure with the piezoelectric vibration portion 231a of one or more second vibration elements 231-2 with respect to the center line of the vibration member. For example, the piezoelectric vibration portion 231a of one or more fourth vibration elements 231-4 may be configured substantially the same as the piezoelectric vibration portion 131a shown in FIG. 19, except for having different widths along the first direction (X).

[0362] In one or more fifth vibration elements 231-5, the multiple first portions 231a1 may be configured to have different sizes (or diameters) and may be configured in a disk shape suitable for outputting different ultrasonic waves. The second portion 231a2 may be configured to surround each side of the multiple disk-shaped first portions 231a1. For example, the piezoelectric vibration portion 231a of one or more fifth vibration elements 231-5 may be configured substantially the same as the piezoelectric vibration portion 231a of one or more first vibration elements 231-1, except for having different sizes.

[0363] In each piezoelectric vibration portion 231a of one or more first to nth vibration elements 231-1 to 231-5, the multiple first portions 231a1 are made of substantially the same piezoelectric material as the first portion 131a1 described with reference to Figures 17 to 19, so redundant explanations therefor can be omitted.

[0364] In each of the piezoelectric vibration parts 231a of one or more of the first to n-th vibration elements 231-1 to 231-5, the second parts 231a2 are configured to fill gaps between the plurality of first parts 231a1 configured in each of the piezoelectric vibration parts 231a of one or more of the first to n-th vibration elements 231-1 to 231-5, and may have an overall connected structure similar to the second parts 231a2 shown in Figures 20A to 20D. The second parts 231a2 are made of substantially the same organic material as the second parts 231a2 described with reference to Figures 17 to 19, and therefore redundant description thereof will be omitted.

[0365] The first electrode unit 231b is disposed on a first surface of the piezoelectric vibration unit 231a disposed in each of the one or more first to n-th vibration elements 231-1 to 231-5, and may be individually connected to each of the plurality of first portions 231a1 disposed on the piezoelectric vibration unit 231a. This is substantially the same as the first electrode unit 131b described with reference to FIG. 18, except that the first electrode unit 231b is individually connected to each of the plurality of first portions 231a1 disposed on the corresponding piezoelectric vibration unit 131a, and therefore a redundant description thereof will be omitted.

[0366] The second electrode unit 231c is disposed on the second surface of the piezoelectric vibration unit 231a disposed on one or more of the first to n-th vibration elements 231-1 to 231-5, respectively, and may be commonly connected to a plurality of first portions 231a1 disposed on the piezoelectric vibration unit 231a. This is substantially the same as the second electrode unit 131c described with reference to FIG. 18, except that the second electrode unit 231c is commonly connected to a plurality of first portions 231a1 disposed on the corresponding piezoelectric vibration unit 231a, and therefore, redundant description thereof will be omitted.

[0367] A vibration device 230 according to another embodiment of the present specification may further include a first cover member 131d disposed on a first surface of each of the one or more first to n-th vibration elements 231-1 to 231-5 via a first adhesive layer 131f, and a second cover member 131e disposed on a second surface of each of the one or more first to n-th vibration elements 231-1 to 231-5 via a second adhesive layer 131g. The first cover member 131d, the second cover member 131e, the first adhesive layer 131f, and the second adhesive layer 131g are substantially the same as the first cover member 131d, the second cover member 131e, the first adhesive layer 131f, and the second adhesive layer 131g described with reference to FIGS. 21 to 23, and therefore the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0368] A vibration device 230 according to another embodiment of the present specification may further include a plurality of first power supply lines (PL1) arranged on the first cover member 131d, one second power supply line (PL2) arranged on the second cover member 131e, and a pad portion 131p electrically connected to the plurality of first power supply lines (PL1) and the second power supply line (PL2).

[0369] Each of the plurality of first power supply lines (PL1) is substantially the same as the first power supply line (PL1) described with reference to Figures 21 to 23, except that it is individually connected to each of the plurality of first electrode parts 231b configured on one or more of the first to nth vibration elements 231-1 to 231-5, respectively, and therefore, redundant description thereof may be omitted.

[0370] One second power supply line (PL2) is substantially the same as the second power supply line (PL2) described with reference to Figures 21 to 23, except that it is connected to a second electrode part 231c configured in common to each of one or more first to nth vibration elements 231-1 to 231-5, and therefore, redundant description thereof can be omitted.

[0371] The pad portion 131p may be configured on an edge portion of one side of either the first cover member 131d or the second cover member 131e so as to be electrically connected to one side (or one end) of each of the plurality of first power supply lines (PL1) and second power supply lines (PL2).

[0372] The pad unit 131p according to an embodiment of the present specification may include a plurality of first pad electrodes electrically connected to one end of each of the plurality of first power supply lines (PL1) and a second pad electrode electrically connected to one end of the second power supply line (PL2). The pad unit 131p is substantially the same as the pad unit 131p described with reference to Figures 21 to 23 except for having a plurality of first pad electrodes, and therefore, redundant description thereof will be omitted.

[0373] The vibration device 230 according to other embodiments herein may further include a signal cable 132 .

[0374] The signal cable 132 is electrically connected to the pad unit 131p and can supply a vibration drive signal (or an audio signal or a voice signal) provided from the audio processing circuit to each of the one or more first to n-th vibration elements 231-1 to 231-5. According to one embodiment, the signal cable 132 can include a plurality of first terminals electrically connected to a plurality of first pad electrodes of the pad unit 131p and a second terminal electrically connected to a second pad electrode of the pad unit 131p. Except for the fact that the signal cable 132 has a plurality of first terminals, the signal cable 132 is substantially the same as the signal cable 132 described with reference to FIGS. 21 to 23, and therefore, a redundant description thereof will be omitted.

[0375] Such a vibration device 230 according to another embodiment of the present specification can have the same effects as the vibration device including the vibration element 131 described with reference to FIGS.

[0376] FIG. 26 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 26 shows a vibration element in which the signal cable of the vibration element shown in FIGS. 17 to 20D has been changed. Therefore, hereinafter, except for the signal cable and related components, the same reference numerals will be used for the remaining same components, and redundant explanations thereof may be omitted or simplified. The cross section of line D-D' shown in FIG. 26 is shown in FIG. 18.

[0377] Combining FIG. 26 with FIG. 18, in a vibration element 131 according to another embodiment of the present disclosure, the signal cable 132 can include an acoustic processing circuit 137 .

[0378] The acoustic processing circuit (or signal generating circuit, or sound generating circuit) 137 may be mounted on the signal cable 132. For example, the acoustic processing circuit 137 may be mounted on an edge portion of the signal cable 132 adjacent to the pad portion 131p of the vibration element 131. By integrating (or mounting) the acoustic processing circuit 137 into (or on) the signal cable 132, the acoustic processing circuit 137 and the signal cable 132 may be realized as a single component.

[0379] The signal cable 132 may be comprised of a double-sided flexible printed circuit, and examples herein are not limited thereto, and may be comprised of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board.

[0380] The signal cable 132 according to one embodiment of the present specification may include a wiring layer on a base film, a lower film bonded to a first surface of the wiring layer via an adhesive, an upper film bonded to a second surface of the wiring layer via an adhesive, and a plurality of contact pads and first and second terminals disposed on the upper film and connected to the wiring layer.

[0381] The wiring layer may include a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc., formed on at least one of the front surface and the bottom surface of the base film. For example, the plurality of signal lines, the first driving signal supply line, and the second driving signal supply line may be made of a conductive material including copper (Cu), aluminum (Al), silver (Ag), or an alloy material of copper (Cu) and silver (Ag), but the embodiments of the present specification are not necessarily limited thereto.

[0382] Each of the plurality of contact pads is disposed on one of the lower film and the upper film, and can be selectively connected to a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc. through via holes.

[0383] The first and second terminals can be electrically connected to the first and second pad electrodes of the pad portion 131p formed on the vibration element 131, respectively.

[0384] The acoustic processing circuit 137 may be mounted on the signal cable 132 and electrically connected to the plurality of contact pads. The acoustic processing circuit 137 may receive acoustic data (or digital acoustic data), a clock, an enable signal, various drive voltages, and the like, supplied from an external acoustic data generating circuit via some of the plurality of contact pads. The acoustic processing circuit 137 may generate first and second vibration drive signals based on the acoustic data and output the generated first and second vibration drive signals to the first and second terminals via the corresponding contact pads and corresponding drive signal supply lines. Therefore, the vibration element 131 may vibrate in response to the first and second vibration drive signals supplied from the acoustic processing circuit 137 mounted on the signal cable 132 via the signal line of the signal cable 132, the first and second terminals, the pad portion 131p, and the first and second power supply lines (PL1, PL2).

[0385] The audio processing circuit 137 according to one embodiment of the present specification may include a decoding unit that receives audio data supplied from an external audio data generating circuit unit, an audio amplifier circuit that generates and outputs first and second vibration driving signals based on the audio data supplied from the decoding unit, a memory circuit that stores setting values for the audio amplifier circuit, a control circuit that controls the operations of the decoding unit, the audio amplifier circuit, and the memory circuit, and passive elements such as resistors.

[0386] The audio amplifier circuit may include a preamplifier circuit that generates first and second vibration drive signals based on acoustic data, and a power amplifier circuit that converts the voltage and / or current of each of the first and second vibration drive signals supplied from the preamplifier circuit to a level suitable for driving the vibration element 131, but the examples of this specification are not limited thereto.

[0387] Each of the decoding unit, the audio amplifier circuit, the memory circuit, and the control circuit may be realized in the form of an integrated circuit and mounted on the signal cable 132. For example, the decoding unit, the audio amplifier circuit, the memory circuit, and the control circuit may be realized in one integrated circuit (IC) or one semiconductor chip.

[0388] Such a vibration element 131 according to another embodiment of the present specification includes an acoustic processing circuit 137 mounted on the signal cable 132, thereby simplifying or simplifying the connection structure between the vibration element 131, the acoustic processing circuit 137, the signal cable 132, and the acoustic data generation circuit unit, and since the acoustic processing circuit 137 is disposed adjacent to the vibration element 131, a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI), etc., generated by the length of the signal cable 132 due to the distance between the acoustic processing circuit 137 and the vibration element 131 can be omitted.

[0389] Additionally, in the vibration element 131 according to other embodiments of the present specification, the signal cable 132 on which the acoustic processing circuit 137 is implemented or integrated may be similarly applied to the vibration element 131 described with reference to one or more of Figures 17 to 13 or the signal cable 132 of the vibration device 230 shown in Figures 24 and 25. For example, the signal cable 132 described with reference to one or more of Figures 17 to 25 may be configured to include the acoustic processing circuit 137, and a duplicated description thereof will be omitted.

[0390] Fig. 27 is a diagram showing a vibration element according to another embodiment of the present specification. Fig. 28 is a cross-sectional view taken along line G-G' shown in Fig. 27. Fig. 29 is a side view of the cross-section taken along line H-H' shown in Fig. 27. Figs. 27 to 29 are diagrams showing other embodiments of the vibration element shown in one or more of Figs. 1 to 13. Figs. 27 to 29 show modifications of the connection structure between the electrode section and the signal cable shown in Fig. 26.

[0391] 27 to 29, a vibration element 131 according to another embodiment of the present specification may include a vibration generating unit and a signal cable 132.

[0392] The vibration generating unit may include a piezoelectric vibration unit 131a, a first electrode unit 131b, and a second electrode unit 131c. Since such a vibration generating unit is substantially the same as the vibration generating unit of the vibration element 131 described with reference to Figures 17 to 20D, the same reference numerals are used therefor, and redundant description thereof may be omitted.

[0393] The signal cable 132 may be integrated with the vibration generating unit by being electrically connected to the first and second electrode units 131b and 131c on one side of the vibration element 131. For example, the signal cable 132 may be electrically connected directly to the first and second electrode units 131b and 131c. For example, the signal cable 132 may be electrically connected to the first and second electrode units 131b and 131c or may be electrically connected directly to the first and second electrode units 131b and 131c without passing through the power supply line and pad units described with reference to FIGS. 17 to 20D.

[0394] The signal cable 132 according to an embodiment of the present disclosure may include first and second protruding lines (FLa, FLb). For example, the first protruding line (FLa) may overlap at least a portion of the first electrode portion 131b and be electrically connected to the first electrode portion 131b or directly connected thereto. The second protruding line (FLb) may overlap at least a portion of the second electrode portion 131c and be electrically connected to the second electrode portion 131c or directly connected thereto. For example, each of the first and second protruding lines (FLa, FLb) may be bent toward the corresponding electrode portion 131b, 131c, although the present disclosure is not limited thereto. For example, each of the first and second protruding lines (FLa, FLb) may be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, although the present disclosure is not limited thereto.

[0395] The signal cable 132 according to one embodiment of the present disclosure may include a body portion, first and second protruding lines (FLa, FLb), and an audio processing circuit 137.

[0396] The body portion may be composed of a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, and examples herein are not limited thereto.

[0397] The body portion according to one embodiment of the present specification may include a wiring layer 132a on a base film, a lower film 132b bonded to a first surface of the wiring layer 132a via a first adhesive 132c, an upper film 132d bonded to a second surface of the wiring layer 132a via a second adhesive 132e, and a plurality of contact pads disposed on the upper film 132d and connected to the wiring layer 132a.

[0398] The wiring layer 132a may include a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc., formed on one or more of the front surface and the bottom surface of the base film. For example, the plurality of signal lines, the first driving signal supply line, the second driving signal supply line, etc. may be made of a conductive material including copper (Cu), aluminum (Al), silver (Ag), or an alloy material of copper (Cu) and silver (Ag), but the embodiments of the present specification are not necessarily limited thereto.

[0399] Each of the plurality of contact pads is disposed on one of the lower film and the upper film, and can be selectively connected to a plurality of signal lines, a first driving signal supply line, a second driving signal supply line, etc. through via holes.

[0400] The first and second protruding lines (FLa, FLb) may be electrically connected to the first and second driving signal supply lines, respectively, arranged on the wiring layer 132a, or may extend or protrude from the first and second driving signal supply lines to the outside through the body side surface 132s. Each of the first and second protruding lines (FLa, FLb) may protrude to a certain length from the body side surface 132s. For example, each of the first and second protruding lines (FLa, FLb) may extend or protrude from the body side surface 132s along the second direction (Y) to a length that overlaps at least a portion of the first and second electrode portions 131b, 131c, respectively.

[0401] The first protruding line (FLa) may bend from one side surface 132s of the body (or one side of the vibration element 131) onto the first electrode portion 131b and be electrically connected to at least a portion of the first electrode portion 131b. For example, the first protruding line (FLa) may be electrically connected directly to or in direct electrical contact with at least a portion of the first electrode portion 131b. For example, the first protruding line (FLa) may be electrically connected to the first electrode portion 131b via a conductive member such as a conductive ball or conductive double-sided tape.

[0402] The second protruding line (FLb) may bend from one side surface 132s of the body portion (or one side of the vibration element 131) onto the second electrode portion 131c and be electrically connected to at least a portion of the second electrode portion 131c. For example, the second protruding line (FLb) may be electrically connected directly to or in direct electrical contact with at least a portion of the second electrode portion 131c. For example, the second protruding line (FLb) may be electrically connected to the second electrode portion 131c via a conductive member such as a conductive ball or conductive double-sided tape.

[0403] The acoustic processing circuit 137 may be mounted on the signal cable 132 and electrically connected to the contact pads. The acoustic processing circuit 137 may receive acoustic data (or digital acoustic data), a clock, an enable signal, various drive voltages, and the like, supplied from an external acoustic data generating circuit via some of the contact pads. The acoustic processing circuit 137 may generate first and second vibration drive signals based on the acoustic data and output the generated first and second vibration drive signals to the first and second protruding lines (FLa, FLb) via the corresponding contact pads and the corresponding drive signal supply lines. Therefore, the vibration element 131 may vibrate in response to the first and second vibration drive signals supplied from the acoustic processing circuit 137 mounted on the signal cable 132 via the signal line of the signal cable 132, the first and second drive signal supply lines, and the first and second protruding lines (FLa, FLb).

[0404] The audio processing circuit 137 according to one embodiment of the present specification may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, and passive elements such as resistors, etc., and since this is substantially the same as the audio processing circuit 137 described with reference to FIG. 26, the same reference numerals will be used therefor, and redundant description thereof will be omitted.

[0405] The signal cable 132 according to one embodiment of the present specification can directly supply vibration drive signals to the first and second electrode portions 131b, 131c via the first and second protruding lines (FLa, FLb), respectively, thereby reducing the voltage drop due to the surface resistance characteristics of the first and second electrode portions 131b, 131c, complementing the electrical characteristics of the first and second electrode portions 131b, 131c, and increasing the freedom of selection of conductive materials used for the first and second electrode portions 131b, 131c.

[0406] The vibration element 131 according to other embodiments of the present disclosure may further include a first cover member 131d and a second cover member 131e.

[0407] The first cover member 131d is disposed on a first surface of the vibration element 131. For example, the first cover member 131d may be configured to cover the first electrode portion 131b and the first protruding line (FLa) of the signal cable 132. Therefore, the first cover member 131d can protect the first electrode portion 131b and the first protruding line (FLa) of the signal cable 132, electrically connect the first protruding line (FLa) of the signal cable 132 to the first electrode portion 131b, or maintain an electrical connection state between the first protruding line (FLa) of the signal cable 132 and the first electrode portion 131b.

[0408] The second cover member 131e may be disposed on a second surface of the vibration element 131. For example, the second cover member 131e may be configured to cover the second electrode portion 131c and the second protruding line (FLb) of the signal cable 132. Therefore, the second cover member 131e can protect the second electrode portion 131c and the second protruding line (FLb) of the signal cable 132, electrically connect the second protruding line (FLb) of the signal cable 132 to the second electrode portion 131c, or maintain an electrical connection state between the second protruding line (FLb) of the signal cable 132 and the second electrode portion 131c.

[0409] According to an embodiment of the present specification, each of the first and second cover members 131d and 131e may include one or more of plastic, fiber, and wood, but the embodiment of the present specification is not limited thereto. For example, each of the first and second cover members 131d and 131e may include the same or different materials. For example, each of the first and second cover members 131d and 131e may be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0410] The first cover member 131d according to an embodiment of the present specification may be connected or joined to the first electrode portion 131b and the first protruding line (FLa) of the signal cable 132 via the first adhesive layer 131f. For example, the first cover member 131d may be connected or joined to the first electrode portion 131b and the first protruding line (FLa) of the signal cable 132 by a film lamination process using the first adhesive layer 131f as an intermediary. Therefore, the first protruding line (or first finger line) (FLa) of the signal cable 132 may be disposed between the first electrode portion 131b and the first cover member 131d and integrated with the vibration element 131.

[0411] The second cover member 131e according to an embodiment of the present specification may be connected or coupled to the second electrode portion 131c and the second protruding line (FLb) of the signal cable 132 via the second adhesive layer 131g. For example, the second cover member 131e may be connected or coupled to the second electrode portion 131c and the second protruding line (FLb) of the signal cable 132 by a film lamination process using the second adhesive layer 131g as an intermediary. Therefore, the second protruding line (or second finger line) (FLb) of the signal cable 132 may be disposed between the second electrode portion 131c and the second cover member 131e and integrated with the vibration element 131.

[0412] Each of the first and second cover members 131d and 131e according to an embodiment of the present specification may be a protective film or an insulating film for protecting the piezoelectric vibration unit 131a and the electrode units 131b and 131c, etc., since they do not include or require a pad unit and a power supply line for receiving a vibration drive signal from the signal cable 132. For example, each of the first and second cover members 131d and 131e may be a polyimide (PI) film or a polyethylene terephthalate (PET) film, but the embodiment of the present specification is not limited thereto.

[0413] According to other embodiments of the present specification, first and second cover members 131d, 131e are electrically insulated from electrode portions 131b, 131c by adhesive layers 131f, 131g, respectively, so that one or more of first and second cover members 131d, 131e may include a metal film or metal plate made of a metal material. Each of first and second cover members 131d, 131e made of a metal material reinforces the mass of vibration element 131 or piezoelectric vibration portion 131a, and reduces the resonant frequency of vibration element 131 or piezoelectric vibration portion 131a due to the increased mass, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range generated by vibration of vibration element 131 or piezoelectric vibration portion 131a. For example, each of the first and second cover members 131d, 131e made of a metal material may be made of one or more of stainless steel, aluminum (Al), magnesium (Mg) alloy, magnesium-lithium (Mg-Li) alloy, and aluminum (Al) alloy, and the embodiments of this specification are not limited thereto.

[0414] According to one embodiment of the present specification, each of the first and second adhesive layers 131f and 131g may include an electrically insulating material that is adhesive and capable of being compressed and restored. For example, each of the first and second adhesive layers 131f and 131g may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, although the embodiment of the present specification is not limited thereto.

[0415] Optionally, at least a portion of the signal cable 132 may be disposed or inserted between the first cover member 131d and the second cover member 131e. For example, one side surface 132s of the body portion of the signal cable 132 (or an edge portion on one side of the body portion) and each of the first and second protruding lines (FLa, FLb) may be disposed or inserted between the first cover member 131d and the second cover member 131e. For example, one side surface 132s of the body portion of the signal cable 132 and each of the first and second protruding lines (FLa, FLb) may be housed inside the vibration element 131 or inserted therein. Therefore, at least a portion of each of the signal cable 132 and the first and second protruding lines (FLa, FLb) is not exposed to the outside of each of the first cover member 131d and the second cover member 131e, thereby preventing breakage of the first and second protruding lines (FLa, FLb) due to stress such as movement or bending of the signal cable 132.

[0416] Such a vibration element 131 according to another embodiment of the present specification can simplify the structure and manufacturing process because the electrode portions 131b, 131c and the signal cable 132 are integrated into one structure, eliminating the need for a patterning process for forming power supply lines and pad portions on the cover members 131d, 131e and a soldering process between the pad portions and the signal cable 132. Furthermore, in the vibration element 131 according to another embodiment of the present specification, a vibration drive signal is directly supplied to the electrode portions 131b, 131c via the protruding lines (FLa, FLb) protruding from the signal cable 132, thereby complementing the electrical characteristics of the first and second electrode portions 131b, 131c. Furthermore, the vibration element 131 according to other embodiments of this specification includes an acoustic processing circuit 137 mounted on the signal cable 132, which simplifies or simplifies the connection structure between the vibration element 131, the acoustic processing circuit 137, the signal cable 132, and the acoustic data generation circuit unit, and by arranging the acoustic processing circuit 137 adjacent to the vibration element 131, a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI), etc., generated by the length of the signal cable 132 due to the distance between the acoustic processing circuit 137 and the vibration element 131 can be omitted.

[0417] Additionally, in the vibration element 131 according to other embodiments of this specification, the signal cable 132 including the protruding lines (FLa, FLb) can be similarly applied to the signal cable 132 of the vibration device 230 shown in Figures 24 and 25, so duplicate explanations therefor will be omitted.

[0418] FIG. 30 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 31 is a cross-sectional view taken along line I-I' in FIG. 30. The cross-section taken along line G-G' in FIG. 30 is shown in FIG. 28. FIGS. 30 and 31 are diagrams showing another embodiment of the vibration element shown in one or more of FIGS. 1 to 13. FIGS. 30 and 31 show a modified connection structure between the electrode unit and the signal cable shown in FIG. 23. Therefore, in the following description, the same reference numerals will be used for the remaining same components, except for the electrode unit, the signal cable, and the components related thereto, and redundant description thereof may be omitted or simplified.

[0419] 30 and 31, a vibration element 131 according to another embodiment of the present specification may include first and second vibration generating units 131-1 and 131-2, a first signal cable 132-1, and a second signal cable 132-2.

[0420] The first and second vibration generating units 131-1 and 131-2 may be electrically separated and spaced apart from each other along the first direction (X). Each of the first and second vibration generating units 131-1 and 131-2 may include a piezoelectric vibration unit 131a, a first electrode unit 131b, and a second electrode unit 131c. Since the first and second vibration generating units 131-1 and 131-2 are substantially the same as the first and second vibration generating units 131-1 and 131-2 of the vibration element 131 described with reference to FIGS. 21 and 22, the same reference numerals will be used and redundant description will be omitted.

[0421] The first signal cable 132-1 may be electrically connected to the first and second electrodes 131b, 131c of the first vibration generating unit 131-1 on one side of the vibration element 131, or may be electrically connected directly to the first signal cable 132-1, thereby being integrated with the first vibration generating unit 131-1. For example, the first signal cable 132-1 may be electrically connected to the first and second electrodes 131b, 131c of the first vibration generating unit 131-1 without passing through the power supply line and pad unit described with reference to FIGS. 21 and 22.

[0422] The second signal cable 132-2 may be integrated with the second vibration generating unit 131-2 by being electrically connected to or directly connected to the first and second electrode units 131b and 131c of the second vibration generating unit 131-2 on one side of the vibration element 131. For example, the second signal cable 132-2 may be electrically connected to the first and second electrode units 131b and 131c of the second vibration generating unit 131-2 without passing through the power supply line and pad units described with reference to FIGS.

[0423] According to an embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may each include a first and second protruding line (FLa, FLb). For example, the first and second protruding lines (FLa, FLb) may each be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, and the present specification is not limited thereto.

[0424] The first protruding line (FLa) (or the first upper protruding line (FLa1)) of the first signal cable 132-1 may overlap at least a portion of the first electrode unit 131b of the first vibration generating unit 131-1 and may be electrically connected to the first electrode unit 131b or may be electrically connected directly to the first electrode unit 131b. The second protruding line (FLb) (or the first lower protruding line (FLb1)) of the first signal cable 132-1 may overlap at least a portion of the second electrode unit 131c of the first vibration generating unit 131-1 and may be electrically connected to the second electrode unit 131c or may be electrically connected directly to the second electrode unit 131c. For example, each of the first and second protruding lines (FLa, FLb) of the first signal cable 132-1 may be bent toward the corresponding electrode unit 131b, 131c of the first vibration generating unit 131-1. However, the embodiments of the present specification are not limited thereto.

[0425] The first protruding line (FLa) (or the second upper protruding line (FLa2)) of the second signal cable 132-2 may overlap at least a portion of the first electrode unit 131b of the second vibration generating unit 131-2 and may be electrically connected to the first electrode unit 131b or may be electrically connected directly to the first electrode unit 131b. The second protruding line (FLb) (or the second lower protruding line (FLb2)) of the second signal cable 132-2 may overlap at least a portion of the second electrode unit 131c of the second vibration generating unit 131-2 and may be electrically connected to the second electrode unit 131c or may be electrically connected directly to the second electrode unit 131c. For example, each of the first and second protruding lines (FLa, FLb) of the second signal cable 132-2 may be bent toward the corresponding electrode unit 131b, 131c of the second vibration generating unit 131-2. However, the embodiments of the present specification are not limited thereto.

[0426] Each of the first and second signal cables 132-1 and 132-2 according to an embodiment of the present specification may include a body portion, first and second protruding lines (FLa and FLb), and sound processing circuits 137a and 137b. Each of the first and second signal cables 132-1 and 132-2 is substantially the same as the signal cable 132 described with reference to Figures 37 to 39, and therefore the same reference numerals are used therefor, and redundant description thereof may be omitted or simplified.

[0427] The acoustic processing circuit (or first acoustic processing circuit, or first signal generating circuit, or first sound generating circuit) 137a mounted on or integrated with the first signal cable 132-1 generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 131b, 131c of the first vibration generating unit 131-1 via the first and second protruding lines (FLa, FLb). The acoustic processing circuit 137a mounted on the first signal cable 132-2 may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, and passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 137 described with reference to FIG. 26 or 28, the same reference numerals will be used and redundant description thereof will be omitted.

[0428] The acoustic processing circuit (or second acoustic processing circuit, or second signal generating circuit, or second sound generating circuit) 137b mounted on or integrated with the second signal cable 132-2 generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 131b, 131c of the second vibration generating unit 131-2 via the first and second protruding lines (FLa, FLb). The acoustic processing circuit 137b mounted on the second signal cable 132-2 may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, and passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 137 described with reference to FIG. 36 or 38, the same reference numerals will be used and redundant description thereof will be omitted.

[0429] A vibration element 131 according to other embodiments of the present specification may further include a first cover member 131d and a second cover member 131e. The first and second cover members 131d and 131e are substantially the same as the first and second cover members 131d and 131e described with reference to Figures 21 and 22 or 27 to 29, except that they are configured to cover the first and second vibration generating units 131-1 and 131-2, respectively, and the first and second protruding lines (FLa, FLb) of the first and second signal cables 132-1 and 132-2, respectively. Therefore, the same reference numerals are used for these cover members, and redundant description thereof may be omitted or simplified.

[0430] The first cover member 131d may be disposed on a first surface of the vibration element 131. For example, the first cover member 131d may be configured to cover the first electrode portions 131b of the first and second vibration generating portions 131-1 and 131-2 and the first protruding lines (FLa) of the first and second signal cables 132-1 and 132-2.

[0431] The second cover member 131e may be disposed on a second surface of the vibration element 131. For example, the second cover member 131e may be configured to cover the second electrode portions 131c of the first and second vibration generating portions 131-1 and 131-2 and the second protruding lines (FLb) of the first and second signal cables 132-1 and 132-2.

[0432] The first cover member 131d according to one embodiment of the present specification may be connected or coupled to the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2 and the first protruding lines (FLa) of the first and second signal cables 132-1 and 132-2 via the first adhesive layer 131f. Therefore, the first protruding lines (or first finger lines) (FLa) of the first and second signal cables 132-1 and 132-2 may be disposed between the first electrode units 131b of the first and second vibration generating units 131-1 and 131-2 and the first cover member 131d, and may be integrated with the vibration element 131.

[0433] According to an embodiment of the present specification, the second cover member 131e may be connected or coupled to the second electrode portions 131c of the first and second vibration generating units 131-1 and 131-2 and the second protruding lines (FLb) of the first and second signal cables 132-1 and 132-2 via the second adhesive layer 131g. Therefore, the second protruding lines (or second finger lines) (FLb) of the first and second signal cables 132-1 and 132-2 may be disposed between the second electrode portions 131c of the first and second vibration generating units 131-1 and 131-2 and the second cover member 131e, and may be integrated with the vibration element 131.

[0434] The first adhesive layer 131f may be disposed between the first and second vibration generating units 131-1 and 131-2 and on the first surfaces of the first and second vibration generating units 131-1 and 131-2. The second adhesive layer 131g may be disposed between the first and second vibration generating units 131-1 and 131-2 and on the second surfaces of the first and second vibration generating units 131-1 and 131-2. For example, the first and second adhesive layers 131f and 131g may be configured between the first cover member 131d and the second cover member 131e so as to completely surround the first and second vibration generating units 131-1 and 131-2, respectively. The first and second adhesive layers 131f and 131g may be coupled or bonded to each other between the first and second vibration generating units 131-1 and 131-2.

[0435] Optionally, as described with reference to Figures 27 to 29, at least a portion of each of the first and second signal cables 132-1, 132-2 may be positioned or inserted between the first cover member 131d and the second cover member 131e, thereby preventing breakage of the first and second protruding lines (FLa, FLb) due to stress such as movement or bending of the signal cable 132.

[0436] Such a vibration element 131 according to another embodiment of the present specification can be driven as a large-area vibrating body by single-body vibration of first and second vibration generating units 131-1 and 131-2, similar to the vibration element 131 described with reference to Figures 21 and 22. Furthermore, similar to the vibration element 131 described with reference to Figures 27 to 29, the vibration element 131 according to another embodiment of the present specification can have a simplified structure and manufacturing process, the electrical characteristics of each of the electrode units 131b and 131c can be complemented, the connection structure between the vibration generating units 131-1 and 131-2, the acoustic processing circuits 137a and 137b, the signal cables 132-1 and 132-2, and the acoustic data generating circuit unit can be simplified or simplified, and a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI) can be omitted.

[0437] Optionally, in a vibration element 131 according to another embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may be changed or configured into a single signal cable 132, as shown by the dotted line in FIG. 30. In a single signal cable 132 according to an embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may simply be configured into one without any structural changes, thereby having a width wider than the sum of the widths of the first and second signal cables 132-1 and 132-2. In a single signal cable 132 according to another embodiment of the present specification, an edge portion on one side of the body portion on which the first and second acoustic processing circuits 137a and 137b are mounted may have a relatively wide width, and the remaining portion, except for the edge portion on one side of the body portion, may have the same width as either of the first and second signal cables 132-1 and 132-2.

[0438] Additionally, in the vibration element 131 according to other embodiments of this specification, the first and second signal cables 132-1, 132-2 including the protruding lines (FLa, FLb) can be similarly applied to the signal cable 132 of the vibration device 230 shown in Figures 24 and 25, so redundant explanations therefor will be omitted.

[0439] FIG. 32 is a diagram showing a vibration element according to another embodiment of the present specification. FIG. 32 shows the vibration element shown in FIGS. 30 and 31 configured with four vibration generating units. Therefore, hereinafter, except for the four vibration generating units and the associated components, the remaining same components are denoted by the same reference numerals, and redundant explanations thereof may be omitted or simplified. The cross section taken along line G-G' in FIG. 32 is shown in FIG. 28, and the cross section taken along line I-I' in FIG. 32 is shown in FIG. 31.

[0440] Combining Figure 32 with Figures 28 and 31, a vibration element 131 according to another embodiment of this specification may include a plurality of vibration generating units 131-1, 131-2, 131-3, 131-4, a first signal cable 132-1, and a second signal cable 132-2.

[0441] The vibration generating units 131-1, 131-2, 131-3, and 131-4 may be electrically separated and spaced apart from one another along the first direction (X) and the second direction (Y). For example, the vibration generating units 131-1, 131-2, 131-3, and 131-4 may be arranged in an i×j pattern or tiled on the same plane. Each of the vibration generating units 131-1, 131-2, 131-3, and 131-4 may include a piezoelectric vibration unit 131a, a first electrode unit 131b, and a second electrode unit 131c. Since the plurality of vibration generating units 131-1, 131-2, 131-3, and 131-4 are substantially the same as the plurality of vibration generating units 131-1, 131-2, 131-3, and 131-4 of the vibration element 131 described with reference to Fig. 23, the same reference numerals are used to denote them, and redundant description can be omitted. In the following description, it is assumed that the vibration element 131 includes first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4.

[0442] The first signal cable 132-1 may be electrically connected to the first and second electrodes 131b and 131c of the first and third vibration generating units 131-1 and 131-3, respectively, on one side of the vibration element 131, or may be electrically connected directly to the first and second electrodes 131b and 131c of the first and third vibration generating units 131-1 and 131-3, thereby being integrated with the first and third vibration generating units 131-1 and 131-3. For example, the first signal cable 132-1 may be electrically connected to the first and second electrodes 131b and 131c of the first and third vibration generating units 131-1 and 131-3, respectively, without passing through the power supply line and pad unit described with reference to FIG.

[0443] The second signal cable 132-2 may be electrically connected to the first and second electrodes 131b and 131c of the second and fourth vibration generating units 131-2 and 131-4, respectively, on one side of the vibration element 131, or may be electrically connected directly to the first and second electrodes 131b and 131c of the second and fourth vibration generating units 131-2 and 131-4, respectively. For example, the second signal cable 132-2 may be electrically connected to the first and second electrodes 131b and 131c of the second and fourth vibration generating units 131-2 and 131-4, respectively, without passing through the power supply line and pad unit described with reference to FIG. 23 .

[0444] According to an embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may each include a first and second protruding line (FLa, FLb). For example, the first and second protruding lines (FLa, FLb) may each be referred to as a protruding electrode, an extension line, an extension electrode, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a flexible protruding electrode, a flexible connecting line, a flexible conductive line, a finger line, or a finger electrode, and the present specification is not limited thereto.

[0445] The first protruding line (FLa) (or first upper protruding line FLa1) of the first signal cable 132-1 overlaps with at least a portion of the first electrode unit 131b of each of the first and third vibration generating units 131-1 and 131-3, and may be electrically connected to the first electrode unit 131b or may be electrically connected directly to the first electrode unit 131b. The second protruding line (FLb) (or first lower protruding line FLb1) of the first signal cable 132-1 overlaps with at least a portion of the second electrode unit 131c of each of the first and third vibration generating units 131-1 and 131-3, and may be electrically connected to the second electrode unit 131c or may be electrically connected directly to the second electrode unit 131c. For example, each of the first and second protruding lines (FLa, FLb) of the first signal cable 132-1 may be bent toward the corresponding electrode portions 131b, 131c of the first and third vibration generating portions 131-1, 131-3, respectively, but the embodiments of this specification are not limited to this.

[0446] The first protruding line (FLa) (or the second upper protruding line (FLa2)) of the second signal cable 132-2 overlaps with at least a portion of the first electrode unit 131b of each of the second and fourth vibration generating units 131-2 and 131-4, and may be electrically connected to the first electrode unit 131b or may be electrically connected directly to the first electrode unit 131b. The second protruding line (FLb) (or the second lower protruding line (FLb2)) of the second signal cable 132-2 overlaps with at least a portion of the second electrode unit 131c of each of the second and fourth vibration generating units 131-2 and 131-4, and may be electrically connected to the second electrode unit 131c or may be electrically connected directly to the second electrode unit 131c. For example, each of the first and second protruding lines (FLa, FLb) of the second signal cable 132-2 may be bent toward the corresponding electrode portions 131b, 131c of the second and fourth vibration generating portions 131-2, 131-4, respectively, but the embodiments of this specification are not limited to this.

[0447] Each of the first and second signal cables 132-1 and 132-2 according to an embodiment of the present specification may include a body portion, first and second protruding lines (FLa and FLb), and sound processing circuits 137a and 137b. Each of the first and second signal cables 132-1 and 132-2 is substantially the same as the signal cable 132 described with reference to Figures 27 to 29, and therefore the same reference numerals are used, and redundant description thereof may be omitted or simplified.

[0448] The acoustic processing circuit (or first acoustic processing circuit) 137a mounted on or integrated with the first signal cable 132-1 generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 131b and 131c of the first and third vibration generating units 131-1 and 131-3, respectively, via the first and second protruding lines (FLa and FLb). The acoustic processing circuit 137a mounted on the first signal cable 132-1 may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 137 described with reference to Figures 26 to 28, the same reference numerals will be used and redundant description thereof will be omitted.

[0449] The acoustic processing circuit (or second acoustic processing circuit) 137b mounted on or integrated with the second signal cable 132-2 generates first and second vibration drive signals based on acoustic data supplied from an external acoustic data generating circuit, and supplies the first and second vibration drive signals to the first and second electrode units 131b and 131c of the second and fourth vibration generating units 131-2 and 131-4, respectively, via the first and second protruding lines (FLa and FLb). The acoustic processing circuit 137b mounted on the second signal cable 132-2 may include a decoding unit, an audio amplifier circuit, a memory circuit, a control circuit, passive elements such as resistors, etc., and since this is substantially the same as the acoustic processing circuit 137 described with reference to Figures 26 to 28, the same reference numerals will be used and redundant description will be omitted.

[0450] A vibration element 131 according to other embodiments of the present specification may further include a first cover member 131d and a second cover member 131e. The first and second cover members 131d and 131e are substantially the same as the first and second cover members 131d and 131e described with reference to Fig. 23 or Figs. 27 to 29, respectively, except that they are configured to cover the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and the first and second protruding lines (FLa and FLb) of the first and second signal cables 132-1 and 132-2, respectively. Therefore, the same reference numerals are used to denote them, and redundant description thereof will be omitted.

[0451] The first cover member 131d may be disposed on a first surface of the vibration element 131. For example, the first cover member 131d may be configured to cover the first electrode portions 131b of the first to fourth vibration generating portions 131-1, 131-2, 131-3, and 131-4 and the first protruding lines (FLa) of the first and second signal cables 132-1 and 132-2.

[0452] The second cover member 131e may be disposed on the second surface of the vibration element 131. For example, the second cover member 131e may be configured to cover the second electrode portions 131c of the first to fourth vibration generating portions 131-1, 131-2, 131-3, and 131-4 and the second protruding lines (FLb) of the first and second signal cables 132-1 and 132-2.

[0453] According to an embodiment of the present specification, the first cover member 131d may be connected or coupled to the first electrode units 131b of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and the first protruding lines (FLa) of the first and second signal cables 132-1 and 132-2 via the first adhesive layer 131f. Therefore, the first protruding lines (or first finger lines) (FLa) of the first and second signal cables 132-1 and 132-2 may be disposed between the first electrode units 131b of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and the first cover member 131d, and integrated with the vibration element 131.

[0454] According to an embodiment of the present specification, the second cover member 131e may be connected or coupled to the second electrode portions 131c of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and the second protruding lines (FLb) of the first and second signal cables 132-1 and 132-2 via the second adhesive layer 131g. Therefore, the second protruding lines (or second finger lines) (FLb) of the first and second signal cables 132-1 and 132-2 may be disposed between the second electrode portions 131c of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and the second cover member 131e, and may be integrated with the vibration element 131.

[0455] The first adhesive layer 131f may be disposed between the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and on the first surfaces of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4. The second adhesive layer 131g may be disposed between the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 and on the second surfaces of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4. For example, the first and second adhesive layers 131f and 131g may be formed between the first cover member 131d and the second cover member 131e so as to completely surround each of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4. The first and second adhesive layers 131f, 131g may be connected or bonded to each other between the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4.

[0456] Optionally, as described with reference to Figures 27 to 29, at least a portion of each of the first and second signal cables 132-1, 132-2 may be positioned or inserted between the first cover member 131d and the second cover member 131e, thereby preventing breakage of the first and second protruding lines (FLa, FLb) due to stress such as movement or bending of the signal cable 132.

[0457] The vibration element 131 according to other embodiments of the present specification can be driven as a large-area vibrating body by single-body vibration of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4, similar to the vibration element 131 described with reference to Fig. 23. Furthermore, similar to the vibration element 131 described with reference to Figs. 27 to 29, the vibration element 131 according to other embodiments of the present specification can have a simplified structure and manufacturing process, the electrical characteristics of the electrode units 131b and 131c can be complemented, the coupling structure between the acoustic processing circuits 137a and 137b, the signal cables 132-1 and 132-2, and the acoustic data generating circuit unit of the first to fourth vibration generating units 131-1, 131-2, 131-3, and 131-4 can be simplified or simplified, and a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI) can be omitted.

[0458] Optionally, in a vibration element 131 according to another embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may be changed or configured into a single signal cable 132, as shown by the dotted line in FIG. 32. In a single signal cable 132 according to an embodiment of the present specification, the first and second signal cables 132-1 and 132-2 may simply be configured into one without any structural changes, thereby having a width wider than the sum of the widths of the first and second signal cables 132-1 and 132-2. In a single signal cable 132 according to another embodiment of the present specification, an edge portion on one side of the body portion on which the first and second acoustic processing circuits 137a and 137b are mounted may have a relatively wide width, and the remaining portion, except for the edge portion on one side of the body portion, may have the same width as either of the first and second signal cables 132-1 and 132-2.

[0459] Additionally, in the vibration element 131 according to other embodiments of this specification, the first and second signal cables 132-1, 132-2 including the protruding lines (FLa, FLb) can be similarly applied to the signal cable 132 of the vibration device 230 shown in Figures 24 and 25, so redundant explanations therefor will be omitted.

[0460] Fig. 33 is a diagram showing an acoustic device according to another embodiment of the present specification. Fig. 34 is a diagram showing the main cable and first to nth signal cables shown in Fig. 33. Fig. 35 is a waveform diagram showing an output signal of the acoustic data generation circuit unit shown in Fig. 33. Figs. 33 to 35 show devices including or employing the acoustic device shown in one or more of Figs. 1 to 32.

[0461] Referring to Figures 33 to 35, an acoustic device according to another embodiment of the present specification may include a vibration device 130, 230, an acoustic data generating circuit unit 180, a main cable 185, and first to nth signal cables 132[1] to 132[n].

[0462] The vibration devices 130, 230 may be vibration devices configured in any one of the acoustic devices 10, 20, 30 described with reference to FIGS.

[0463] The vibration devices 130, 230 can include first to nth vibration elements 131[1] to 131[n]. Each of the first to nth vibration elements 131[1] to 131[n] can include any one of the vibration elements 131, 231-1 to 231-5 described with reference to FIGS. 26 to 32. For example, the first to nth vibration elements 131[1] to 131[n] can be the same or different from one another. One or more of the first to nth vibration elements 131[1] to 131[n] can be different. Therefore, redundant descriptions of the first to nth vibration elements 131[1] to 131[n] can be omitted.

[0464] The acoustic data generation circuit unit 180 (or sound card) can generate acoustic data (Sdata) based on an acoustic source (or a digital acoustic source). The acoustic data generation circuit unit 180 can generate first to n-th enable signals (EN[1] to EN[n]) corresponding to the drive mode of the device based on the acoustic source or acoustic data. The acoustic data generation circuit unit 180 can encode the reference clock (CLK), the acoustic data (Sdata), and the first to n-th enable signals (EN[1] to EN[n]) using a preset serial interface method (or digital serial interface method) and supply the encoded data to the first to n-th vibration elements 131[1] to 131[n]. For example, the acoustic data generation circuit unit 180 can transmit acoustic data (Sdata) corresponding to each of the first to n-th vibration elements 131[1] to 131[n] using the serial interface method. For example, the serial interface method may be I2S (Intergrated Interchip Sound), but the embodiments of this specification are not limited to this.

[0465] The main cable 185 may be connected to the acoustic data generation circuit unit 180. For example, the main cable 185 may have a length corresponding to the longest distance between each of the first to nth vibration elements 131[1] to 131[n] and the acoustic data generation circuit unit 180.

[0466] The main cable 185 according to an embodiment of the present specification may include first to nth enable signal lines (ESL[1] to ESL[n]), a clock line (CL), and a data line (DL).

[0467] The acoustic data generation circuit unit 180 can supply corresponding enable signals (EN[1] to EN[n]) to the first to nth enable signal lines (ESL[1] to ESL[n]), supply a reference clock (CLK) to the clock line (CL), and supply acoustic data (Sdata) to the data line (DL).

[0468] The first to n-th signal cables 132[1] to 132[n] can be connected between the main cable 185 and the first to n-th vibration elements 131[1] to 131[n], respectively.

[0469] According to an embodiment of the present specification, each of the first to nth signal cables 132[1] to 132[n] may be branched or extended to a corresponding vibration device among the first to nth vibration elements 131[1] to 131[n] from the main cable 185. For example, each of the first to nth signal cables 132[1] to 132[n] may be branched from the main cable 185 and individually connected to the first to nth vibration elements 131[1] to 131[n].

[0470] According to other embodiments of the present specification, the first to nth signal cables 132[1] to 132[n] may be connected to the main cable 185 in a connector manner. For example, the main cable 185 may further include first to nth connectors 186[1] to 186[n].

[0471] The first to n-th connectors 186[1] to 186[n] may each include a first to a third connecting terminal. The first connecting terminal of each of the first to n-th connectors 186[1] to 186[n] may be electrically connected to a corresponding enable signal line among the first to n-th enable signal lines (ESL[1] to ESL[n]). The second connecting terminal of each of the first to n-th connectors 186[1] to 186[n] may be commonly connected to a clock line (CL). The third connecting terminal of each of the first to n-th connectors 186[1] to 186[n] may be commonly connected to a data line (DL).

[0472] According to one embodiment of the present specification, at least a portion of each of the first to nth signal cables 132[1] to 132[n] connected to the main cable 185 in a connector manner may be inserted between the first and second cover members 131d, 131e of the vibration element 131, as described with reference to FIG. 28, and redundant description thereof may be omitted.

[0473] Each of the first to n-th signal cables 132[1] to 132[n] according to an embodiment of the present specification may include a body portion, first and second protruding lines (FLa, FLb), and an acoustic processing circuit 137.

[0474] As shown in FIG. 28, the body portion may include a wiring layer 132a on a base film, a lower film 132b bonded to a first surface of the wiring layer 132a via a first adhesive 132c, an upper film 132d bonded to a second surface of the wiring layer 132a via a second adhesive 132e, and a plurality of contact pads disposed on the upper film 132d and connected to the wiring layer 132a.

[0475] The wiring layer 132a can include first to third signal lines (SL1, SL2, SL3) and first and second drive signal supply lines (VLa, VLb).

[0476] The first to third signal lines (SL1, SL2, SL3) may be arranged to be parallel to each other.

[0477] The first signal line (SL1) of each of the first to nth signal cables 132[1] to 132[n] may be individually connected to a corresponding enable signal line among the first to nth enable signal lines (ESL[1] to ESL[n]) of the main cable 185. For example, the first signal line (SL1) of the first signal cable 132[1] may be electrically connected to the first enable signal line (ESL[1]) of the main cable 185, and the first signal line (SL1) of the nth signal cable 132[n] may be electrically connected to the nth enable signal line (ESL[n]) of the main cable 185.

[0478] The second signal lines (SL2) of the first to n-th signal cables 132[1] to 132[n] may be commonly connected to the clock line (CL) of the main cable 185.

[0479] The third signal lines (SL3) of the first to n-th signal cables 132[1] to 132[n] may be commonly connected to the data line (DL) of the main cable 185.

[0480] The first and second drive signal supply lines (VLa, VLb) may be arranged parallel to each other at the tip ends of the corresponding signal cables 132[1] to 132[n].

[0481] Each of the first and second protruding lines (FLa, FLb) may be electrically connected to each of the first and second drive signal supply lines (VLa, VLb), or may extend or protrude from each of the first and second drive signal supply lines (VLa, VLb) beyond one side 132s of the body portion to the outside.

[0482] The first protruding line (FLa) may be electrically connected to the first electrode layer of the vibration elements 131, 231-1 to 231-5 of the corresponding vibration device, and the second protruding line (FLb) may be electrically connected to the second electrode layer of the vibration elements 131, 231-1 to 231-5 of the corresponding vibration device. This is the same as described above, so repeated explanations thereof will be omitted.

[0483] The acoustic processing circuit 137 can be mounted on each of the first to nth signal cables 132[1] to 132[n] and electrically connected to each of the first to third signal lines (SL1, SL2, SL3) and each of the first and second drive signal supply lines (VLa, VLb).

[0484] The acoustic processing circuit 137 decodes the enable signals (EN[1] to EN[n]), reference clock (CLK) and acoustic data (Sdata) supplied from the acoustic data generation circuit unit 180 via the first to third signal lines (SL1, SL2, SL3), and generates first and second vibration drive signals for vibrating each of the first to nth vibration elements 131[1] to 131[n] based on the decoded enable signals (EN[1] to EN[n]), reference clock (CLK) and acoustic data (Sdata), and outputs them to the first and second drive signal supply lines (VLa, VLb). As a result, each of the first to n-th vibration elements 131[1] to 131[n] vibrates in response to the first and second vibration drive signals supplied via the first and second drive signal supply lines (VLa, VLb) and the first and second protrusion lines (FLa, FLb) of the corresponding signal cables 132[1] to 132[n], and can output sound corresponding to the sound data (Sdata). For example, each of the first to n-th vibration elements 131[1] to 131[n] can be driven sequentially or simultaneously based on the corresponding enable signals (EN[1] to EN[n]).

[0485] According to an embodiment of the present invention, the acoustic processing circuit 137 mounted on each of the first to nth signal cables 132[1] to 132[n] can be enabled by an enable signal of a first logic level (LL1) supplied via the first signal line (SL1) of the corresponding signal cable to generate first and second vibration drive signals, and can be disabled by an enable signal of a second logic level (LL2). For example, the acoustic processing circuit 137 mounted on the first signal cable 132[1] can be enabled by a first enable signal (EN[1]) of a first logic level (LL1) supplied via the first signal line (SL1) of the first signal cable 132[1] to generate first and second vibration drive signals based on the reference clock (CLK) and acoustic data (Sdata), and output them to the first and second drive signal supply lines (VLa, VLb). Similarly, the acoustic processing circuit 137 implemented in the nth signal cable 132[n] is enabled by the nth enable signal (EN[n]) of the first logic level (LL1) supplied via the first signal line (SL1) of the nth signal cable 132[n], and can generate first and second vibration drive signals based on the reference clock (CLK) and acoustic data (Sdata) and output them to the first and second drive signal supply lines (VLa, VLb).

[0486] According to the vibration device according to one embodiment of the present specification, the acoustic data (Sdata) output from the acoustic data generation circuit unit 180 is transmitted to each of the first to nth vibration elements 131[1] to 131[n] via a serial interface using the main cable 185 and the first to nth signal cables 132[1] to 132[n]. This simplifies the wiring structure between the acoustic data generation circuit unit 180 and the first to nth vibration elements 131[1] to 131[n], improving assembly. Furthermore, by mounting the acoustic processing circuit 137 on each of the first to nth signal cables 132[1] to 132[n], the circuit configuration can be simplified, and a filter circuit including an inductor and a capacitor for preventing electromagnetic interference (EMI) caused by the length of the main cable 185 and the signal cables 132[1] to 132[n] can be omitted.

[0487] FIG. 36 is a diagram illustrating an acoustic device according to another embodiment of the present specification.

[0488] Referring to FIG. 36, an acoustic device 40 according to another embodiment of the present disclosure may include a stand 190, a motor 191, a sensing unit 192, and a motor driving unit 193.

[0489] The stand 190 can rotatably support the housing 150 of the acoustic device 10, 20, 30 described with reference to one or more of Figures 1 to 35. For example, the stand 190 can include a rotation shaft rotatably coupled to a side of the housing 150.

[0490] The motor 191 can be housed inside the stand 190 so as to be coupled to the rotation shaft. The motor 191 rotates the rotation shaft to rotate the housing 150, thereby rotating the front surface of the vibration member 110.

[0491] The sensing unit 192 is disposed in the housing 150 or the stand 190 and can sense one or more of the position and / or movement of a listener (or user) to generate sensory information.

[0492] The sensing unit 192 according to an embodiment of the present specification may sense one or more of the position and / or movement of a listener (or user) through ultrasonic sensing and generate sensing information. For example, the sensing unit 192 may include an ultrasonic sensor 192a that transmits and receives ultrasonic waves, and a sensing circuit 192b that is housed in the stand 190 (or the housing 150) and generates sensing information based on the ultrasonic waves received from the ultrasonic sensor 192a.

[0493] The sensing unit 192 according to another embodiment of the present specification may sense one or more of the position and / or movement of the listener (or user) via a motion tracking camera to generate sensory information. For example, the sensing unit 192 may include a motion tracking camera that tracks one or more of the position and / or movement of the listener (or user), and a data processing circuit that generates sensory information corresponding to one or more of the position and / or movement of the listener (or user) based on a data signal from the motion tracking camera.

[0494] The motor driving unit 193 can generate a motor driving signal based on the sensing information supplied from the sensing unit 192 to drive the motor 191. Thus, in response to the motor driving signal supplied from the motor driving unit 193, the motor 191 can rotate the rotation shaft so that the front surface of the vibrating member 110 corresponds to one or more of the position and / or movement of the listener (or user).

[0495] Such an acoustic device 40 according to another embodiment of the present specification can provide the listener (or user) with sound optimized for one or more of the listener's (or user's) position and / or movement by rotating the housing 150 based on sensory information of one or more of the listener's (or user's) position and / or movement sensed via the sensor unit 192.

[0496] Fig. 37 is a diagram showing an audio system according to an embodiment of the present specification. Fig. 38 is a diagram showing a panel drive circuit and a speaker device of the display device shown in Fig. 37. Fig. 39 is a conceptual diagram showing directional sound of an audio system according to an embodiment of the present specification.

[0497] Referring to Figures 37 to 39, an audio system according to one embodiment of the present specification may include a display device 300, one or more first speaker devices (LSP1, LSP2), and one or more second speaker devices (RSP1, RSP2).

[0498] The display device 300 may include a display panel 310 and a display driver circuit 350 .

[0499] The display panel 310 may include a screen having a plurality of pixels for displaying images.

[0500] The display driving circuit 350 can display images corresponding to an input image source on the display panel 310. The display driving circuit 350 can display different images in a first area (DA1) and a second area (DA2) of the screen of the display panel 310, generate a screen split mode signal, and transmit the screen split mode signal to one or more first speaker devices (LSP1, LSP2) and one or more second speaker devices (RSP1, RSP2) via near-field wireless communication. The display driving circuit 350 can also transmit audio data corresponding to the images displayed in the first area (DA1) and the second area (DA2) of the screen together with the screen split mode signal.

[0501] The one or more first speaker devices (LSP1, LSP2) may be rotatably arranged around a first side of the display device 300 and may include an audio output device 195. For example, the one or more first speaker devices (LSP1, LSP2) may be one or more left speakers. The one or more first speaker devices (LSP1, LSP2) may rotate the audio output device 195 toward a first listener (LM1) located around a first region of the display panel 310 in response to a screen split mode signal and audio data transmitted from a display driver circuit 350 of the display device 300.

[0502] The one or more second speaker devices (RSP1, RSP2) are rotatably arranged around a second side of the display device 300 and may include an audio output device 195. For example, the one or more second speaker devices (RSP1, RSP2) may be one or more right speakers. The one or more second speaker devices (RSP1, RSP2) can rotate the audio output device 195 toward a second listener (LM2) located around a second region of the display panel 310 in response to a screen split mode signal and audio data transmitted from a display driver circuit 350 of the display device 300.

[0503] Each of the one or more first speaker devices (LSP1, LSP2) and one or more second speaker devices (RSP1, RSP2) according to one embodiment of the present specification may include a stand 190 having a rotation axis that rotatably supports a housing 150 of an audio output device 195, a motor 191 that is arranged on the stand 190 and rotates the rotation axis, a sensing unit 192 that is arranged on the audio output device 195 or the stand 190 and senses one or more of the position and movement of the corresponding listener (LM1, LM2) and generates sensory information, and a motor driving unit 193 that drives the motor 191 based on the sensory information supplied from the sensing unit 192 in response to a screen split mode signal.

[0504] According to one embodiment of the present specification, the sound output device 195 is substantially the same as the sound devices 10, 20, and 30 described with reference to one or more of Figures 1 to 35, or is substantially the same as the sound device 40 described with reference to Figure 35, and therefore the same reference numerals are given thereto, and redundant descriptions thereof may be omitted or simplified.

[0505] According to one embodiment of the present specification, the stand 190, the motor 191, the sensor 192, and the motor driver 193 are substantially identical to the stand 190, the motor 191, the sensor 192, and the motor driver 193 of the audio device 40 described with reference to FIG. 35, respectively, except that the stand 190, the motor 191, the sensor 192, and the motor driver 193 further rotate the audio output device 195 in response to a screen split mode signal transmitted from the display driver circuit 350 of the display device 300. Therefore, the same reference numerals are used for these components, and redundant descriptions thereof may be omitted or simplified.

[0506] Referring to FIG. 38, an audio system according to one embodiment of the present specification rotates the sound output direction of one or more first speaker devices (LSP1, LSP2) toward a first listener (LM1) located near the first area (DA1) of the display panel 310 and rotates the sound output direction of one or more second speaker devices (RSP1, RSP2) toward a second listener (LM2) located near the second area (DA2) of the display panel 310 based on the screen division mode of the display device 300 that displays different images in the first area (DA1) and the second area (DA2) of the display panel 310, thereby providing sounds corresponding to the viewing screens of the first and second listeners (LM1, LM2) even when the display panel 310 is in screen division mode.

[0507] Furthermore, the sound system according to an embodiment of the present specification can provide the listeners (LM1, LM2) with sound optimized for one or more of the positions and / or movements of the listeners (LM1, LM2) by automatically adjusting the sound output direction of each of the first speaker devices (LSP1, LSP2) and the second speaker devices (RSP1, RSP2) based on the single screen mode of the display device 300 and on the sensing information of one or more of the positions and / or movements of the listeners (LM1, LM2) sensed via the sensing units 192 configured in each of the first speaker devices (LSP1, LSP2) and the second speaker devices (RSP1, RSP2).

[0508] The audio device according to the embodiments of the present specification can be used as an audio device for electronic devices that can be connected to any electronic device via wire or wirelessly. For example, devices that can be connected to an audio device according to an embodiment of the present specification may include a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, a rollable device, a bendable device, a flexible device, a curved device, a sliding device, a variable device, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA), an MP3 player, a mobile medical device, a desktop PC, a laptop PC, a netbook computer, a workstation, a navigation system, a vehicle navigation system, a vehicle display device, a vehicle device, a theater device, a theater display device, a television, a wallpaper display device, a signage device, a game device, a notebook computer, a monitor, a camera, a video camera, and a home appliance.

[0509] An audio device according to an embodiment of the present specification and an audio system including the same can be described as follows.

[0510] An acoustic device according to some embodiments of the present disclosure may include a vibration device having a vibration member, a housing configured to cover a back surface of the vibration member, and one or more vibration elements configured to vibrate the vibration member, wherein the vibration member may include a non-planar structure.

[0511] According to some embodiments herein, the front surface opposite the back surface of the vibration member can have a non-planar configuration.

[0512] According to some embodiments herein, the non-planar structure may include a curved or angled structure.

[0513] According to some embodiments herein, the vibration member may have any one of the following shapes: a circle, an ellipse, and a polygon having three or more vertices.

[0514] According to some embodiments herein, the vibration member may have a non-planar configuration with one or more recesses and one or more protrusions.

[0515] According to some embodiments of the present specification, the vibration device includes first to nth vibration elements (n is a natural number greater than or equal to 2) connected to the back surface of the vibration member, and the spacing between the first to nth vibration elements may be greater than or equal to 3 mm and less than or equal to 5 mm.

[0516] According to some embodiments of the present specification, the spacing between each of the first vibration element and the nth vibration element and the end of the vibration member relative to the first direction may be smaller than the length of one vibration element and larger than the spacing between adjacent vibration elements.

[0517] According to some embodiments of the present specification, the vibration member includes first to nth regions connected to the first to nth vibration elements, respectively, and the sound output from one or more of the first to nth regions can have a different frequency range from the sound output from the remaining regions.

[0518] According to some embodiments of the present specification, a vibration device includes first to nth (n is a natural number greater than or equal to 2) vibration elements connected to a rear surface of a vibration member, the first to nth vibration elements being arranged at regular intervals along a first direction, and the interval between each of the first and nth vibration elements and the end of the vibration member based on the first direction may be smaller than the length of one vibration element.

[0519] An acoustic device according to some embodiments of the present specification includes a housing having an accommodation space, a vibration member configured to cover the accommodation space of the housing and having 1st to nth regions (n is a natural number greater than or equal to 3), and a vibration device having one or more 1st to nth vibration elements configured to vibrate each of the 1st to nth regions of the vibration member, and the housing includes a space separation portion that separates the accommodation space into 1st to nth spaces corresponding to each of the 1st to nth regions.

[0520] According to some embodiments of the present specification, the sound output from one or more of the first to nth regions of the vibrating member may have a different frequency range than the sound output from the remaining regions.

[0521] According to some embodiments of the present specification, the vibration member includes first to third regions arranged along a first direction, and the spatial separation portion includes a first partition arranged between the first space and the second space, and a second partition arranged between the second space and the third space.

[0522] According to some embodiments of the present specification, the housing includes a bottom covering the back surface of the vibration member and the vibration device, a first side connected to a first edge portion of the bottom parallel to a first direction, a second side connected to a second edge portion of the bottom parallel to the first edge portion of the bottom, a third side connected to a third edge portion of the bottom parallel to a second direction intersecting the first direction, and a fourth side connected to a fourth edge portion of the bottom parallel to the third edge portion of the bottom, and the space separation portion may include a first partition connected between the first side and the second side and separating the first space from the second space, and a second partition connected between the first side and the second side and separating the second space from the third space.

[0523] According to some embodiments of the present specification, the vibration member may include first to third regions arranged along a first direction, and one or more first vibration elements may be configured to vibrate the first region of the vibration member, one or more second vibration elements may be configured to vibrate the second region of the vibration member, and one or more third vibration elements may be configured to vibrate the third region of the vibration member.

[0524] According to some embodiments of the present specification, the housing may further include a first sound isolation portion disposed in a first space between one or more first vibration elements and the first partition wall, and a second sound isolation portion disposed in a third space between one or more third vibration elements and the second partition wall.

[0525] According to some embodiments of the present specification, each of the first and second sound isolation portions may include one or more lips protruding from inner surfaces of one or more of the first and second side portions along the second direction, and one or more sound isolation members arranged between the one or more lips and a back surface of the vibrating member.

[0526] According to some embodiments of the present specification, each of the first and second sound isolation portions may include a plurality of lips protruding from the inner surfaces of one or more of the first and second side portions so as to have different lengths from each other along the second direction, and a plurality of sound isolation members arranged between each of the plurality of lips and the back surface of the vibration member.

[0527] According to some embodiments herein, the lengths of each of the plurality of lips may vary toward the spatial separation portion.

[0528] According to some embodiments herein, the length of each of the plurality of lips may increase toward the spatial separator.

[0529] According to some embodiments of the present specification, the housing may further include a first sound-limiting portion disposed around the one or more first vibration elements, and a second sound-limiting portion disposed around the one or more third vibration elements.

[0530] According to some embodiments of the present specification, the first sound-limiting portion includes one or more first protrusions protruding into the first space from the inner surfaces of one or more of the first to third side portions and the first partition wall surrounding the first space, and one or more first sound-limiting members arranged between the one or more first protrusions and the rear surface of the vibration member, and the second sound-limiting portion includes one or more second protrusions protruding into the third space from the inner surfaces of one or more of the first side portion, second side portion, fourth side portion, and second partition wall surrounding the third space, and one or more second sound-limiting members arranged between the one or more second protrusions and the rear surface of the vibration member.

[0531] According to some embodiments of the present specification, the one or more first protrusions may face toward the inner surfaces of one or more of the first side portions and the second side portions between the one or more first vibration elements and the first partition, and the one or more second protrusions may face toward the inner surfaces of one or more of the first side portions and the second side portions between the one or more third vibration elements and the second partition.

[0532] According to some embodiments of the present specification, one or more first protrusions may extend from one or more inner surfaces of the third side portion and the first partition toward the center of one or more first vibration elements, and one or more second protrusions may extend from one or more inner surfaces of the fourth side portion and the second partition toward the center of one or more third vibration elements.

[0533] According to some embodiments of the present specification, a space having one or more first protrusions on a third side and one or more second protrusions on a fourth side can output frequencies in the high frequency range.

[0534] According to some embodiments of the present specification, a space having one or more first protrusions and one or more second protrusions on a first side and a second side can output frequencies in the low frequency range.

[0535] According to some embodiments of the present specification, the first region of the vibrating member includes a first edge region of the vibrating member, and the nth region of the vibrating member includes a second edge region of the vibrating member, and the frequency range of the sound output from each of the first to nth regions of the vibrating member may become higher from the middle region of the vibrating member to the first region and the nth region.

[0536] According to some embodiments of the present specification, the first region of the vibration member includes a first edge region of the vibration member, and the nth region of the vibration member includes a second edge region of the vibration member, and the size of each of the one or more 1st to nth vibration elements may decrease from the middle region of the vibration member to the first region and the nth region.

[0537] According to some embodiments of the present specification, one or more first vibration elements vibrate the first region to generate ultrasonic waves, and one or more nth vibration elements vibrate the nth region to generate multiple ultrasonic waves having different frequencies from each other, and any one of the multiple ultrasonic waves output from the nth region has the same frequency as the ultrasonic waves output from the first region, and the rest of the multiple ultrasonic waves output from the nth region have a higher frequency than the ultrasonic waves output from the first region.

[0538] According to some embodiments of the present specification, one or more first vibration elements arranged in the first region may be configured to transmit and receive ultrasound, and one or more nth vibration elements arranged in the nth region may be configured to transmit and receive ultrasound.

[0539] An acoustic device according to some embodiments of the present specification may further include a stand having a rotation shaft that rotatably supports the housing, a motor that is disposed on the stand and rotates the rotation shaft, a sensing unit that is disposed on the housing or the stand and senses one or more of the position and movement of a listener to generate sensory information, and a motor driving unit that drives the motor based on the sensory information supplied from the sensing unit.

[0540] According to some embodiments of the present disclosure, the sensing unit may include an ultrasonic sensor that transmits and receives ultrasonic waves, and a sensing circuit that generates sensing information based on the ultrasonic waves received by the ultrasonic sensor.

[0541] An acoustic device according to some embodiments of the present disclosure may further include a first connecting member and a second connecting member disposed in parallel between the vibration member and the housing and having different hardnesses.

[0542] According to some embodiments herein, the first connecting member may be surrounded by the second connecting member and may have a lower hardness than the second connecting member.

[0543] According to some embodiments herein, the first connecting member may be surrounded by the second connecting member and may have a higher hardness than the second connecting member.

[0544] According to some embodiments of the present specification, the vibration element may include a piezoelectric vibration portion including a plurality of piezoelectric portions and a flexible portion connected between the plurality of piezoelectric portions, a first electrode portion on a first surface of the piezoelectric vibration portion, and a second electrode portion on a second surface opposite the first surface of the piezoelectric vibration portion.

[0545] According to some embodiments of the present specification, the vibration element includes two or more vibration generating units arranged along one or more of a first direction and a second direction intersecting the first direction, and each of the two or more vibration generating units includes a piezoelectric vibration unit including a plurality of piezoelectric units and a flexible unit connected between the plurality of piezoelectric units, a first electrode unit on a first surface of the piezoelectric vibration unit, and a second electrode unit on a second surface opposite the first surface of the piezoelectric vibration unit.

[0546] According to some embodiments of the present specification, the vibration element may further include one or more signal cables electrically coupled to each of the first electrode portion and the second electrode portion, and a signal generating circuit implemented on the one or more signal cables.

[0547] According to some embodiments of the present specification, the vibration element may further include a first cover member covering the first electrode portion and a second cover member covering the second electrode portion, and the one or more signal cables may include a first protruding line arranged between the first cover member and the first electrode portion and electrically connected to the first electrode portion, and a second protruding line arranged between the second cover member and the second electrode portion and electrically connected to the second electrode portion.

[0548] According to some embodiments herein, a portion of one or more signal cables may be housed between the first cover member and the second cover member.

[0549] According to some embodiments herein, the vibrating member may include one or more of the following materials: metal, plastic, fabric, leather, wood, cloth, paper, and glass.

[0550] According to some embodiments of the present specification, the vibrating member may be any one of a display panel having pixels that display an image, a screen panel onto which an image is projected from a display device, a lighting panel, a signage panel, glass, and a mirror.

[0551] An audio system according to some embodiments of the present specification includes a display device that displays an image, one or more first speaker devices that are rotatably arranged around a first side of the display device and have an audio output device, and one or more second speaker devices that are rotatably arranged around a second side of the display device and have an audio output device, wherein the display device includes a display panel and a display driver that displays different images on first and second regions of the display panel and provides a screen split mode signal to each of the one or more first speaker devices and the one or more second speaker devices, wherein the one or more first speaker devices can rotate the audio output device to a first listener located around the first region of the display panel in response to the screen split mode signal, and the one or more second speaker devices can rotate the audio output device to a second listener located around the second region of the display panel in response to the screen split mode signal.

[0552] According to some embodiments of the present specification, each of the one or more first speaker devices and the one or more second speaker devices may include a stand having a rotation shaft for rotatably supporting the sound output device, a motor disposed on the stand for rotating the rotation shaft, a sensing unit disposed on the sound output device or the stand for sensing one or more of the position and movement of a corresponding listener and generating sensing information, and a motor driving unit for driving the motor b...

Claims

1. a housing having an accommodation space; a vibration member configured to cover the accommodation space of the housing and having first to nth regions (n is a natural number of 3 or more); a vibration device having one or more first to nth vibration elements configured to vibrate first to nth regions of the vibration member, respectively; a first connecting member and a second connecting member arranged in parallel between the vibration member and the housing; Including, the housing includes a space separating portion separating the receiving space into first to nth spaces corresponding to the first to nth regions, respectively; the first connecting member and the second connecting member have different hardnesses, the housing has a pattern portion provided on a bottom surface; the first to nth vibration elements are connected to a rear surface of the vibration member, one or more of the first to n-th regions are configured to output sound having a frequency range different from sound output from one or more other of the first to n-th regions; the first region of the vibration member includes a first edge region of the vibration member, and the nth region of the vibration member includes a second edge region of the vibration member; the size of each of the one or more first to nth vibration elements decreases from the central region of the vibration member toward the first region and the nth region; sound equipment.

2. the vibration member includes first to third regions arranged along a first horizontal direction, The spatial separation unit is a first partition wall disposed between the first space and the second space; a second partition wall disposed between the second space and the third space; and 10. The acoustic device of claim 1, comprising:

3. The housing includes: a bottom portion covering the rear surface of the vibration member and the vibration device; a first side connected to a first edge portion of the bottom parallel to a first horizontal direction; a second side connected to a second edge portion of the base parallel to the first edge portion of the base; a third side portion connected to a third edge portion of the bottom portion parallel to a second direction intersecting the first direction; a fourth side connected to a fourth edge portion of the base parallel to the third edge portion of the base; Including, The spatial separation unit is a first partition wall connected between the first side portion and the second side portion and separating the first space from the second space; a second partition wall connected between the first side portion and the second side portion and separating the second space from the third space; 10. The acoustic device of claim 1, comprising:

4. the vibration member includes the first to third regions arranged along the first direction, the one or more first vibration elements are configured to vibrate the first region of the vibration member; the one or more second vibration elements are configured to vibrate the second region of the vibration member; the one or more third vibration elements are configured to vibrate the third region of the vibration member; 4. The acoustic device according to claim 3.

5. The housing includes: a first sound isolation unit disposed in the first space between the one or more first vibration elements and the first partition wall; a second sound isolation unit disposed in the third space between the one or more third vibration elements and the second partition wall; The acoustic device of claim 4 further comprising:

6. Each of the first and second sound separation units includes: one or more lips protruding from inner surfaces of one or more of the first side portion and the second side portion along the second direction; The acoustic device of claim 5 , including one or more sound isolating members disposed between the one or more lips and a rear surface of the vibrating member.

7. Each of the first and second sound separation units includes: a plurality of lips protruding from an inner surface of at least one of the first side portion and the second side portion to have different lengths along the second direction; The acoustic device of claim 5 , further comprising a plurality of sound isolating members disposed between each of the plurality of lips and a rear surface of the vibrating member.

8. The acoustic device according to claim 7 , wherein the lengths of the plurality of lips vary as they approach the spatial separation portion.

9. The acoustic device according to claim 7 , wherein the length of each of the plurality of lips increases as the lips approach the spatial separation portion.

10. The housing includes: a first sound limiting portion disposed around the one or more first vibration elements; a second sound limiting portion disposed around the one or more third vibration elements; The acoustic device of claim 4 further comprising:

11. The first sound limiting unit is one or more first protrusions protruding into the first space from inner surfaces of one or more of the first to third side portions and the first partition wall surrounding the first space; one or more first sound limiting members disposed between the one or more first protrusions and a rear surface of the vibrating member, The second sound limiting unit is one or more second protrusions protruding into the third space from inner surfaces of one or more of the first side portion, the second side portion, the fourth side portion, and the second partition wall surrounding the third space; and The acoustic device of claim 10 , further comprising one or more second sound-limiting members disposed between the one or more second protrusions and a rear surface of the vibrating member.

12. the one or more first protrusions face one or more inner surfaces of the first side portion and the second side portion between the one or more first vibration elements and the first partition wall, The acoustic device of claim 11 , wherein the one or more second protrusions extend toward inner surfaces of one or more of the first side portion and the second side portion located between the one or more third vibration elements and the second partition wall.

13. the one or more first protrusions extend from inner surfaces of the third side portion and one or more of the first partition walls toward central portions of the one or more first vibration elements, The acoustic device according to claim 11 , wherein the one or more second protrusions extend from inner surfaces of one or more of the fourth side portion and the second partition wall toward central portions of the one or more third vibration elements.

14. The acoustic device according to claim 11, wherein a space having one or more first protrusions on the third side and one or more second protrusions on the fourth side outputs frequencies in a high frequency range.

15. The acoustic device according to claim 11, wherein a space having one or more first protrusions and one or more second protrusions on the first side and the second side outputs frequencies in a low frequency range.

16. An acoustic device as described in claim 1, wherein the frequency range of the sound output from each of the first to nth regions of the vibrating member becomes higher as it goes from the intermediate region of the vibrating member to the first region and the nth region.

17. the one or more first vibration elements vibrate the first region to generate ultrasonic waves; the one or more n-th vibration elements vibrate the n-th region to generate a plurality of ultrasonic waves having mutually different frequencies; Any one of the plurality of ultrasonic waves output from the nth region has the same frequency as the ultrasonic waves output from the first region, and the rest of the plurality of ultrasonic waves output from the nth region have a higher frequency than the ultrasonic waves output from the first region.

2. The acoustic device of claim 1.

18. the one or more first vibration elements arranged in the first region are configured to transmit and receive ultrasonic waves; The one or more n-th vibration elements arranged in the n-th region are configured to transmit and receive ultrasonic waves.

2. The acoustic device of claim 1.

19. a stand having a rotation shaft that rotatably supports the housing; a motor disposed on the stand and configured to rotate the rotation shaft; a sensing unit disposed on the housing or the stand, the sensing unit sensing one or more of a position and a movement of a listener to generate sensing information; a motor driving unit that drives the motor based on the sensing information supplied from the sensing unit; The acoustic device of claim 1 further comprising:

20. The sensing unit an ultrasonic sensor that transmits and receives ultrasonic waves; a sensing circuit that generates the sensing information based on ultrasonic waves received by the ultrasonic sensor; 20. The acoustic device of claim 19, comprising:

21. The acoustic device according to any one of claims 1 to 20, wherein the first connecting member is surrounded by the second connecting member and has a lower hardness than the second connecting member.

22. The acoustic device according to any one of claims 1 to 20, wherein the first connecting member is surrounded by the second connecting member and has a higher hardness than the second connecting member.

23. The vibration element is a piezoelectric vibration unit including a plurality of piezoelectric units and a flexible unit connected between the plurality of piezoelectric units; a first electrode portion on a first surface of the piezoelectric vibration portion; The acoustic device according to any one of claims 1 to 20, further comprising: a second electrode portion on a second surface opposite to the first surface of the piezoelectric vibration portion.

24. the vibration element includes two or more vibration generating units arranged along one or more directions selected from a first direction and a second direction intersecting the first direction, Each of the two or more vibration generating units is a piezoelectric vibration unit including a plurality of piezoelectric units and a flexible unit connected between the plurality of piezoelectric units; a first electrode portion on a first surface of the piezoelectric vibration portion; The acoustic device according to any one of claims 1 to 20, further comprising: a second electrode portion on a second surface opposite to the first surface of the piezoelectric vibration portion.

25. The vibration element is one or more signal cables electrically connected to the first electrode unit and the second electrode unit, respectively; a signal generating circuit mounted on the one or more signal cables; 25. The acoustic device of claim 24, further comprising:

26. The vibration element is a first cover member that covers the first electrode portion; a second cover member that covers the second electrode portion; further comprising The one or more signal cables a first protruding line disposed between the first cover member and the first electrode portion and electrically connected to the first electrode portion; a second protruding line disposed between the second cover member and the second electrode portion and electrically connected to the second electrode portion; 26. The acoustic device of claim 25, comprising:

27. 27. The acoustic device of claim 26, wherein a portion of the one or more signal cables is housed between the first cover member and the second cover member.

28. 21. The acoustic device according to claim 1, wherein the vibrating member comprises one or more materials selected from the group consisting of metal, plastic, fiber, leather, wood, cloth, paper, and glass.

29. The acoustic device according to any one of claims 1 to 20, wherein the vibrating member is any one of a display panel having pixels for displaying an image, a screen panel onto which an image is projected from a display device, a lighting panel, a signage panel, glass, and a mirror.

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