Vibration device and apparatus including vibration device

Abstract

The present invention provides a vibrator and an apparatus including a vibrator with simplified structure and manufacturing process. [Solution] The vibration device includes a vibration generating unit 10 which includes a plurality of vibrating parts 10A, 10B, a connecting layer 20 which is arranged between the plurality of vibrating parts, and a signal cable 90 which is electrically connected to the plurality of vibrating parts, each of the plurality of vibrating parts which includes at least one or more connecting parts 60, and the signal cable does not overlap with at least one or more connecting parts 60.

Description

Technical Field

[0001] This specification relates to a vibration device and a device including the vibration device.

Background Art

[0002] In recent years, the demand for slimming and thinning of electronic devices has been increasing. Speakers applied to electronic devices and the like are also attracting attention to a piezoelectric element method that can be embodied with a smaller thickness instead of the voice coil method in accordance with the demand for slimming and thinning.

[0003] A speaker or a vibration device to which a piezoelectric element is applied can be driven or vibrated by receiving a driving power source or a driving signal from a signal cable.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventors of this specification have conducted various studies and experiments in order to simplify the structure and manufacturing process of the vibration device. Through various studies and experiments, they have invented a vibration device with a new structure in which the structure and manufacturing process are more simplified, and a device including the vibration device.

[0005] The problem to be solved according to the embodiments of this specification is to provide a vibration device and a device including the vibration device in which the structure and manufacturing process are more simplified.

[0006] The problem to be solved according to the embodiments of this specification is to provide a vibration device and a device including the vibration device that can prevent cracks from occurring in the vibration device.

[0007] The problem to be solved according to the embodiments of this specification is to provide a vibration device and a device including the vibration device in which the weight and thickness are further reduced.

[0008] The problem to be solved by the embodiments of this specification is to provide a vibration device that can improve the sound pressure characteristics of an acoustic device, and an apparatus including the vibration device.

[0009] The problems to be solved by the embodiments described herein are not limited to those mentioned above, and other problems not mentioned above can be clearly understood by a person with ordinary skill in the art to which the technical concept of this specification pertains from the following description. [Means for solving the problem]

[0010] The vibration device according to the embodiments of this specification may include a vibration generating unit comprising a plurality of vibrating parts, a connecting layer disposed between the plurality of vibrating parts, and a signal cable electrically connected to the plurality of vibrating parts. Each of the plurality of vibrating parts comprises at least one connecting part, and the signal cable does not have to overlap with at least one connecting part.

[0011] The apparatus according to the embodiments of this specification may include a manual vibrating member and a vibration generating device connected to the manual vibrating member and causing the manual vibrating member to vibrate. The vibration generating device may include a vibration generating unit comprising a plurality of vibrating parts, a connecting layer disposed between the plurality of vibrating parts, and a signal cable electrically connected to the plurality of vibrating parts. Each of the plurality of vibrating parts comprises at least one connecting part, and the signal cable does not have to overlap with at least one connecting part.

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

[0013] According to the embodiments of this specification, it is possible to provide a vibrating device and an apparatus including the same with a simplified structure and manufacturing process.

[0014] According to the embodiments described herein, a lightweight vibrator can be realized by reducing the thickness and weight of the vibrator.

[0015] According to the embodiments of this specification, by preventing defects such as cracks generated in the vibration device, the yield rate can be improved, so that the optimization of the manufacturing process through the reduction of production energy can be realized.

[0016] According to the embodiments of this specification, the reduction of production energy and the optimization of the manufacturing process can be realized through the simplification of the manufacturing process.

[0017] The contents of the problems to be solved, the means for solving the problems, and the effects mentioned above do not specify the essential features of the claims. The claims are not limited by the matters described in the detailed description of the invention.

Brief Description of the Drawings

[0018] [Figure 1] It is a diagram showing a vibration device according to an embodiment of this specification. [Figure 2] It is an exploded perspective view showing the connection structure between the signal cable and the vibration generating part shown in FIG. 1 according to an embodiment of this specification. [Figure 3] It is a cross-sectional view taken along line A-A' shown in FIG. 1. [Figure 4] It is a cross-sectional view taken along line B-B' shown in FIG. 1. [Figure 5] It is a cross-sectional view taken along line C-C' shown in FIG. 1. [Figure 6] It is a cross-sectional view taken along line D-D' shown in FIG. 1. [Figure 7] It is a cross-sectional view taken along line E-E' shown in FIG. 1. [Figure 8] It is a cross-sectional view taken along line F-F' shown in FIG. 1. [Figure 9] It is a diagram showing a vibration device according to another embodiment of this specification. [Figure 10] It is a cross-sectional view taken along line G-G' shown in FIG. 9. [Figure 11] It is a cross-sectional view taken along line H-H' shown in FIG. 9. [Figure 12] It is a cross-sectional view taken along line I-I' shown in FIG. 9. [Figure 13] It is a sectional view taken along line J-J' shown in FIG. 9. [Figure 14] It is a diagram showing the device according to the embodiment of this specification. [Figure 15] It is a sectional view taken along line K-K' shown in FIG. 14.

Mode for Carrying Out the Invention

[0019] The advantages, features, and the methods for achieving them of this specification will become clear by referring to each embodiment described in detail hereinafter together with the accompanying drawings. However, this specification is not limited to each embodiment disclosed below and can be embodied in various different forms. Merely, each embodiment of this specification is provided to complete the disclosure of the present invention and to fully inform those having ordinary knowledge in the technical field to which the present invention pertains of the scope of the invention, and this specification merely defines what is defined by the scope of the claims.

[0020] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings for explaining the embodiments of this specification are exemplary, so this specification is not limited to what is illustrated. The same reference numerals throughout the specification refer to the same components. Also, when it is determined that a detailed description of related known technologies may obscure the gist of the present invention when explaining this specification, the detailed description thereof is omitted.

[0021] When terms such as "comprising", "having", or "consisting of" mentioned in this specification are used, other parts can be added as long as "only" is not used. When a component is expressed in the singular, it includes the case of including a plurality unless otherwise explicitly stated.

[0022] When interpreting a component, even if there is no separate explicit description regarding the error range, it is interpreted as including the error range.

[0023] When describing a spatial relationship, for example, when describing the positional relationship between two parts, such as "above," "above," "below," or "beside," unless, for example, "immediately" or "directly," one or more other parts may be located between the two parts.

[0024] When describing temporal relationships, if a temporal sequence is described using phrases such as "after," "following," "next," or "before," then, unless "immediately" or "directly" is used, it can include cases that are not continuous.

[0025] While terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another. Therefore, the first component referred to below may also be the second component within the technical concept of this specification.

[0026] When describing the components of this specification, terms such as “First,” “Second,” “A,” “B,” “(a),” or “(b)” may be used. Such terms are merely for the purpose of distinguishing a component from other components, and do not limit the nature, order, sequence, or number of the component.

[0027] When it is stated that one component is “linked,” “joined,” or “connected” to another component, that component may be directly linked to or connected to the other components, but unless otherwise explicitly stated, it should be understood that other components may “intersect” between each component that may be indirectly linked or connected.

[0028] "At least one" should be understood to include all combinations of one or more related components. For example, "at least one of the first, second, and third components" can be said to include not only the first, second, or third component, but also all combinations of two or more components from the first, second, and third components.

[0029] Many of the features of the various embodiments of the present invention can be partially or entirely combined or combined with one another, enabling a wide range of technically diverse interlocking and driving mechanisms, and each embodiment may be implemented independently of the others or in conjunction with one another.

[0030] The embodiments of this specification will be described below with reference to the attached drawings and examples. The scales of the components shown in the drawings are different from the actual scales for the sake of explanation and are not limited to those shown in the drawings.

[0031] Figure 1 is a diagram showing a vibration device according to one embodiment of this specification. Figure 2 is an exploded perspective view showing the connection structure between the signal cable and the vibration generating unit shown in Figure 1, according to one embodiment of this specification. Figure 3 is a surface view taken along line A-A' in Figure 1. Figure 4 is a cross-sectional view taken along line B-B' in Figure 1. Figure 5 is a cross-sectional view taken along line C-C' in Figure 1. Figure 7 is a cross-sectional view taken along line E-E' in Figure 1. Figure 8 is a cross-sectional view taken along line F-F' in Figure 1.

[0032] Referring to Figures 1 to 8, the vibration device according to the embodiment of this specification (vibration generating device 200 shown in Figure 15) may include a vibration generating unit 10, a connecting layer 20, a connecting unit 60, and a signal cable 90.

[0033] The vibration generating unit 10 may include a plurality of vibration units 10A, 10B. For example, the vibration generating unit 10 may include a plurality of vibration units 10A, 10B that are superimposed on each other or overlapping each other. For example, the vibration generating unit 10 may include a plurality of vibration units 10A, 10B that are stacked vertically or overlapping each other. For example, the vibration generating unit 10 may include a first vibration unit 10A and a second vibration unit 10B stacked on the first vibration unit 10A.

[0034] According to the embodiments of this specification, each of the first vibrating section 10A and the second vibrating section 10B may include a piezoelectric material (or electroactive material) or piezoelectric element that exhibits a piezoelectric effect. For example, a piezoelectric material (or piezoelectric element) may have the characteristic that, when an external force acts on the crystal structure of the piezoelectric material, pressure or torsion occurs, causing a potential difference to be generated by dielectric polarization due to the relative positional change of positive (+) ions and negative (-) ions, and conversely, vibration is generated by an electric field caused by an applied voltage.

[0035] Each of the first vibrating section 10A and the second vibrating section 10B may include a vibrating layer 11, a first electrode layer 13, and a second electrode layer 15.

[0036] The vibrating layer 11 may include a piezoelectric material (or electroactive material) that exhibits a piezoelectric effect. The vibrating layer 11 may be composed of a ceramic series material capable of relatively high vibration manifestation, or a piezoelectric ceramic having a perovskite series crystal structure.

[0037] Piezoelectric ceramics may consist of single-crystal ceramics having a single-crystal structure, or ceramic materials having a polycrystalline structure or polycrystalline ceramics. Single-crystal ceramic piezoelectric materials may include α-AlPO4, α-SiO2, LiNbO3, Tb2(MoO4)3, Li2B4O7, or ZnO, but are not limited to these in the examples provided herein. Polycrystalline ceramic piezoelectric materials may include PZT (lead zirconate titanate) materials containing lead (Pb), zirconium (Zr), and titanium (Ti), or PZNN (lead zirconate nickel niobate) materials containing lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but are not limited to these in the examples provided herein. To give another example, the vibrating layer 11 may contain at least one of CaTiO3, BaTiO3, and SrTiO3 that do not contain lead (Pb), but are not limited to these in the examples provided herein.

[0038] According to the embodiments of this specification, the vibration layers 11 of the first vibration section 10A and the second vibration section 10B may have the same ceramic crystal structure or different ceramic crystal structures. For example, the vibration layer 11 of the first vibration section 10A and the vibration layer 11 of the second vibration section 10B may each be made of single-crystal ceramic or polycrystalline ceramic. For example, one of the vibration layer 11 of the first vibration section 10A and the vibration layer 11 of the second vibration section 10B may be made of single-crystal ceramic, and the other may be made of polycrystalline ceramic.

[0039] According to the embodiments of this specification, in each of the first vibrating section 10A and the second vibrating section 10B, the vibrating layer 11 may be configured (or arranged) between the first electrode layer 13 and the second electrode layer 15.

[0040] Referring to Figures 2 to 8, in the first vibrating section 10A, the first electrode layer 13 may be positioned on the first surface (or bottom surface) of the vibrating layer 11. The first electrode layer 13 may have the same size as the vibrating layer 11 or be smaller in size than the vibrating layer 11, but the embodiments herein are not limited thereto. For example, the first electrode layer 13 may have a single electrode shape. For example, the first electrode layer 13 may have a rectangular shape. For example, the end (or side) of the first electrode layer 13 may be separated from the end (or side) of the vibrating layer 11, thereby preventing electrical connection (or short circuit) between the first electrode layer 13 and the second electrode layer 15. For example, the first electrode layer 13 of the first vibrating section 10A may be the first electrode layer, lower electrode layer, or lowest electrode layer of the vibration generating section 10, but the embodiments herein are not limited thereto.

[0041] In the first vibrating section 10A, the second electrode layer 15 may be positioned on a second surface (or top surface) that is different from or opposite to the first surface of the vibrating layer 11. The second electrode layer 15 may be smaller in size than the vibrating layer 11, but the embodiments herein are not limited thereto. For example, the second electrode layer 15 of the first vibrating section 10A may be the second electrode layer of the vibration generating section 10, but the embodiments herein are not limited thereto.

[0042] In one embodiment of this specification, in the first vibrating section 10A, the first electrode layer 13 may include a plurality of protrusions (or a pair of protrusions) 13a, 13b protruding (or extending) from one end (or one side). The plurality of protrusions 13a, 13b may be arranged side by side, spaced apart from each other. As a result, the first electrode layer 13 is not formed in the region where the plurality of protrusions 13a, 13b are spaced apart from each other, and the first surface (or bottom surface) of the vibrating layer 11 may be exposed. As shown in Figure 3, the shape of the first electrode layer 13 of the first vibrating section 10A may be the same as that of the first electrode layer 13 of the second vibrating section 10B. The position and shape of the plurality of protrusions 13a, 13b of the first vibrating section 10A may be the same as that of the plurality of protrusions (or a pair of protrusions) 13a, 13b of the second vibrating section 10B. Therefore, the positions and shapes of the multiple protrusions 13a and 13b of the first vibrating section 10A can be referenced to the second vibrating section 10B.

[0043] In another embodiment of this specification, in the first vibrating section 10A, the first electrode layer 13 may include a recess extending from a portion of one end (or side). The recess may be formed concavely along a second direction Y from the central portion of one end (or side) of the first electrode layer 13. For example, the recess may be formed concavely to have a certain length along the second direction Y from the central portion of one end (or side) of the first electrode layer 13. For example, the recess may be located between a plurality of protrusions (or a pair of protrusions) 13a, 13b, but the embodiments of this specification are not limited thereto. For example, the recess may be a portion of the first electrode layer 13 that has been removed, or a portion where the first electrode layer 13 is not formed. For example, the recess may be a patterned portion, an unformed electrode portion, an unplaced electrode portion, or an open portion, but the embodiments of this specification are not limited thereto.

[0044] In one embodiment of this specification, in the first vibrating section 10A, the second electrode layer 15 may include a plurality of protrusions (or a pair of protrusions) 15a, 15b protruding (or extending) from the other end (or other side). The plurality of protrusions 15a, 15b may be arranged side by side, spaced apart from each other. As a result, the second electrode layer 15 is not formed in the region where the plurality of protrusions 15a, 15b are spaced apart from each other, and the second surface (or top surface) of the vibrating layer 11 may be exposed.

[0045] In other embodiments of this specification, in the first vibrating section 10A, the second electrode layer 15 may include a recess extending from a portion of the other end (or side). The recess may be formed concavely along the second direction Y from the central portion of one end (or side) of the second electrode layer 15. For example, the recess may be formed concavely to have a certain length along the second direction Y from the central portion of one end (or side) of the second electrode layer 15. For example, the recess may be located between a plurality of protrusions (or a pair of protrusions) 15a, 15b, but the embodiments of this specification are not limited thereto. For example, the recess may be a portion of the second electrode layer 15 that has been removed, or a portion where the second electrode layer 15 has not been formed. For example, the recess may be a patterned portion, an unformed electrode portion, an unplaced electrode portion, or an open portion, but the embodiments of this specification are not limited thereto.

[0046] According to the embodiments of this specification, the second electrode layer 15 and the first electrode layer 13 of the first vibrating part 10A may have different shapes from each other. For example, the multiple protrusions 15a, 15b formed on the second electrode layer 15 of the first vibrating part 10A and the multiple protrusions 13a, 13b formed on the first electrode layer 13 of the first vibrating part 10A may have non-overlapping regions. For example, the recesses formed on the second electrode layer 15 of the first vibrating part 10A and the recesses formed on the first electrode layer 13 of the first vibrating part 10A do not have to overlap. For example, the recesses formed on the second electrode layer 15 of the first vibrating part 10A and the recesses formed on the first electrode layer 13 of the first vibrating part 10A may be configured so as not to face each other, but the embodiments of this specification are not limited thereto.

[0047] In the second vibrating section 10B, the first electrode layer 13 may be positioned on a second surface (or upper surface) that is different from or opposite to the first surface of the vibrating layer 11. The first electrode layer 13 may be smaller in size than the vibrating layer 11, but the embodiments herein are not limited thereto. For example, the first electrode layer 13 of the second vibrating section 10B may be the third electrode layer, upper electrode layer, or top electrode layer of the vibration generating section 10, but the embodiments herein are not limited thereto.

[0048] In one embodiment of this specification, in the second vibrating section 10B, the first electrode layer 13 may include a plurality of protrusions (or a pair of protrusions) 13a, 13b protruding (or extending) from one end (or one side). The plurality of protrusions 13a, 13b may be arranged side by side, spaced apart from each other. As a result, the first electrode layer 13 is not formed in the region where the plurality of protrusions 13a, 13b are spaced apart from each other, and the second surface (or top surface) of the vibrating layer 11 may be exposed.

[0049] In another embodiment of this specification, in the second vibrating section 10B, the first electrode layer 13 may include a recess extending from a portion of one end (or side). The recess may be formed concavely along a second direction Y from the central portion of one end (or side) of the first electrode layer 13. For example, the recess may be formed concavely along the second direction Y from the central portion of one end (or side) of the first electrode layer 13 to have a certain length. For example, the recess may be located between a plurality of protrusions (or a pair of protrusions) 13a, 13b, but the embodiments of this specification are not limited thereto. For example, the recess may be a portion of the first electrode layer 13 that has been removed, or a portion where the first electrode layer 13 is not formed. For example, the recess may be a patterned portion, an unformed electrode portion, an unplaced electrode portion, or an open portion, but the embodiments of this specification are not limited thereto.

[0050] In the second vibrating section 10B, the second electrode layer 15 may be located on a first surface (or bottom surface) that is different from or opposite to the second surface of the vibrating layer 11. The second electrode layer 15 may be smaller in size than the vibrating layer 11, but the embodiments herein are not limited thereto. For example, the second electrode layer 15 of the second vibrating section 10B may be the fourth electrode layer of the vibration generating section 10, but the embodiments herein are not limited thereto.

[0051] In one embodiment of this specification, in the second vibrating section 10B, the second electrode layer 15 may include a plurality of protrusions (or a pair of protrusions) 15a, 15b protruding (or extending) from one end (or one side). The plurality of protrusions 15a, 15b may be arranged side by side, spaced apart from each other. As a result, the second electrode layer 15 is not formed in the region where the plurality of protrusions 15a, 15b are spaced apart from each other, and the first surface (or bottom surface) of the vibrating layer 11 may be exposed.

[0052] In another embodiment of this specification, in the second vibrating section 10B, the second electrode layer 15 may include a recess extending from a portion of one end (or side). The recess may be formed concavely along the second direction Y from the central portion of one end (or side) of the second electrode layer 15. For example, the recess may be formed concavely to have a certain length along the second direction Y from the central portion of one end (or side) of the second electrode layer 15. For example, the recess may be located between a plurality of protrusions (or a pair of protrusions) 15a, 15b, but the embodiments of this specification are not limited thereto. For example, the recess may be a portion of the second electrode layer 15 that has been removed, or a portion where the second electrode layer 15 has not been formed. For example, the recess may be a patterned portion, an unformed electrode portion, an unplaced electrode portion, or an open portion, but the embodiments of this specification are not limited thereto.

[0053] According to the embodiments of this specification, the second electrode layer 15 and the first electrode layer 13 of the second vibrating section 10B may have different shapes from each other. For example, the multiple protrusions 15a, 15b formed on the second electrode layer 15 of the second vibrating section 10B and the multiple protrusions 13a, 13b formed on the first electrode layer 13 of the second vibrating section 10B may have non-overlapping regions. For example, the recesses formed on the second electrode layer 15 of the second vibrating section 10B and the recesses formed on the first electrode layer 13 of the second vibrating section 10B do not have to overlap. For example, the recesses formed on the second electrode layer 15 of the second vibrating section 10B and the recesses formed on the first electrode layer 13 of the second vibrating section 10B may be configured so that they do not face each other, but the embodiments of this specification are not limited thereto.

[0054] According to the embodiments of this specification, the multiple protrusions 13a, 13b formed in the first electrode layer 13 of the first vibrating section 10A and the multiple protrusions 13a, 13b formed in the first electrode layer 13 of the second vibrating section 10B can overlap each other. For example, the recess formed in the first electrode layer 13 of the first vibrating section 10A and the recess formed in the first electrode layer 13 of the second vibrating section 10B can overlap.

[0055] According to the embodiments of this specification, the multiple protrusions 15a, 15b formed in the second electrode layer 15 of the first vibrating section 10A and the multiple protrusions 15a, 15b formed in the second electrode layer 15 of the second vibrating section 10B can overlap each other. For example, the recess formed in the second electrode layer 15 of the first vibrating section 10A and the recess formed in the second electrode layer 15 of the second vibrating section 10B can overlap.

[0056] According to embodiments of this specification, the second electrode layer 15 of the first vibrating section 10A and the second electrode layer 15 of the second vibrating section 10B may be arranged adjacent to each other. By arranging the second electrode layer 15 of the first vibrating section 10A and the second electrode layer 15 of the second vibrating section 10B adjacent to each other, the polarization direction (or polling direction) formed in the vibrating layer 11 of the first vibrating section 10A and the polarization direction (or polling direction) formed in the vibrating layer 11 of the second vibrating section 10B may be configured to be in different or opposite directions. For example, the polarization direction formed in the vibrating layer 11 of the first vibrating section 10A and the second vibrating section 10B may be configured to be from the first electrode layer 13 toward the second electrode layer 15.

[0057] In the laminated structure of the first and second vibrating sections 10A and 10B, in order to prevent electrical short circuits between adjacent electrode layers, the first electrode layer 13 and the second electrode layer 15 may be formed on the remaining portion of the vibrating layer 11, excluding the edges. For example, the distance between the respective sides of the first electrode layer 13 and the second electrode layer 15 and the side of the vibrating layer 11 may be at least 0.5 mm, and the embodiments herein are not limited thereto. For example, the distance between the respective sides of the first electrode layer 13 and the second electrode layer 15 and the side of the vibrating layer 11 may be at least 1 mm, but the embodiments herein are not limited thereto.

[0058] According to the examples herein, one or more of the first electrode layer 13 and the second electrode layer 15 may include a material that is fired at a high temperature (e.g., 650°C or less). For example, one or more of the first electrode layer 13 and the second electrode layer 15 may consist of a transparent conductive material, a translucent conductive material, or an opaque conductive material, but the examples herein are not limited thereto. For example, the transparent or translucent conductive material may include ITO (indium tin oxide) or IZO (indium zinc oxide), but the examples herein are not limited thereto. The opaque conductive material may consist of gold (Au), silver (Ag), platinum (Pt), palladium (Pd), molybdenum (Mo), magnesium (Mg), carbon, or silver (Ag) containing glass frit, or alloys thereof, but the examples herein are not limited thereto. For example, carbon may be a carbon material including carbon black, Ketjen black, carbon nanotubes, and graphite, but the examples herein are not limited to these.

[0059] According to the embodiments herein, each of the first electrode layer 13 and the second electrode layer 15 may contain silver (Ag) with low resistivity in order to improve the electrical and / or vibrational properties of the vibrating layer 11.

[0060] In the first electrode layer 13 and the second electrode layer 15, which consist of silver (Ag) containing glass frit, the glass frit content may be 1 wt% or more and 12 wt% or less, but the examples herein are not limited thereto. The glass frit may include PbO or Bi2O3 series substances, but the examples herein are not limited thereto. For example, the glass frit may include any one of Bi, Zn, Al, B, and Si oxides, but the examples herein are not limited thereto.

[0061] A vibration generating unit 10 according to one embodiment of this specification may include a plurality of auxiliary electrode layers 16, 17, 18, 19. The plurality of auxiliary electrode layers may include first to fourth auxiliary electrode layers 16, 17, 18, 19. The first vibration unit 10A may include first and third auxiliary electrode layers 16, 18. The second vibration unit 10B may include second and fourth auxiliary electrode layers 17, 19.

[0062] Referring to Figures 2 to 6, in the first vibrating section 10A, the first auxiliary electrode layer 16 may be configured (or formed) on the underside of the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. The first auxiliary electrode layer 16 may be configured (or formed) on the first surface (or bottom surface) of the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. For example, the first auxiliary electrode layer 16 may be configured (or formed) on the underside of the vibrating layer 11 between a plurality of protrusions 13a, 13b on the first electrode layer 13.

[0063] In the first vibrating section 10A, the first auxiliary electrode layer 16 can be electrically connected to the second electrode layer 15 via the vibrating layer 11. For example, the first auxiliary electrode layer 16 can be electrically connected to the second electrode layer 15 via a first contact hole CNT1 formed in the vibrating layer 11. For example, in the first vibrating section 10A, a first contact hole CNT1 superimposed on the first auxiliary electrode layer 16 can be formed at one end (or one side) of the vibrating layer 11. The first contact hole CNT1 can be superimposed on the second electrode layer 15 and the first auxiliary electrode layer 16. Of the plurality of connecting parts 60, the first connecting part 61 can be inserted into the first contact hole CNT1. The first auxiliary electrode layer 16 and the second electrode layer 15 can be electrically connected via the first contact hole CNT1. The first auxiliary electrode layer 16 can be electrically connected to the second electrode layer 15 of the first vibrating section 10A via the first connecting part 61.

[0064] Referring to Figures 2, 7, and 8, in the first vibrating section 10A, the third auxiliary electrode layer 18 may be configured (or formed) on the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. The third auxiliary electrode layer 18 may be configured (or formed) on the second surface of the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. For example, the third auxiliary electrode layer 18 may be configured (or formed) on the vibrating layer 11 between a plurality of protrusions 15a, 15b in the second electrode layer 15.

[0065] In the first vibrating section 10A, the third auxiliary electrode layer 18 can be electrically connected to the first electrode layer 13 via the vibrating layer 11. For example, the third auxiliary electrode layer 18 can be electrically connected to the first electrode layer 13 via a third contact hole CNT 3 configured (or formed) in the vibrating layer 11. For example, in the first vibrating section 10A, a third contact hole CNT 3 superimposed on the third auxiliary electrode layer 18 can be configured at the other end (or other side) of the vibrating layer 11. The third contact hole CNT 3 can be superimposed on the first electrode layer 13 and the third auxiliary electrode layer 18. Of the plurality of connecting parts 60, the third connecting part 63 can be inserted into the third contact hole CNT 3. The third auxiliary electrode layer 18 and the first electrode layer 13 can be electrically connected via the third contact hole CNT 3. The third auxiliary electrode layer 18 can be electrically connected to the first electrode layer 13 of the first vibrating section 10A via the third connecting part 63.

[0066] Referring to Figures 2 to 6, in the second vibrating section 10B, the second auxiliary electrode layer 17 may be configured (or formed) on the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. The second auxiliary electrode layer 17 may be configured (or formed) on the second surface (or upper surface) of the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. For example, the second auxiliary electrode layer 17 may be configured (or formed) on the vibrating layer 11 between a plurality of protrusions 13a, 13b on the first electrode layer 13.

[0067] In the second vibrating section 10B, the second auxiliary electrode layer 17 can be electrically connected to the second electrode layer 15 via the vibrating layer 11. For example, the second auxiliary electrode layer 17 can be electrically connected to the first electrode layer 13 via a second contact hole CNT 2 configured (or formed) in the vibrating layer 11. For example, in the second vibrating section 10B, a second contact hole CNT 2 superimposed on the second auxiliary electrode layer 17 can be configured at one end (or one side) of the vibrating layer 11. The second contact hole CNT 2 can be superimposed on the second electrode layer 15 and the second auxiliary electrode layer 17. Of the plurality of connecting parts 60, the second connecting part 62 can be inserted into the second contact hole CNT 2. The second auxiliary electrode layer 17 and the second electrode layer 15 can be electrically connected via the second contact hole CNT 2. The second auxiliary electrode layer 17 can be electrically connected to the second electrode layer 15 of the second vibrating section 10B via the second connecting part 62.

[0068] Referring to Figures 2, 7, and 8, in the second vibrating section 10B, the fourth auxiliary electrode layer 19 may be configured (or formed) on the underside of the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. The fourth auxiliary electrode layer 19 may be configured (or formed) on the first surface (or bottom surface) of the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. For example, the fourth auxiliary electrode layer 19 may be configured (or formed) on the vibrating layer 11 between a plurality of protrusions 15a, 15b in the second electrode layer 15. The fourth auxiliary electrode layer 19 may be superimposed on the third auxiliary electrode layer 18 of the first vibrating section 10A.

[0069] In the second vibrating section 10B, the fourth auxiliary electrode layer 19 can be electrically connected to the first electrode layer 13 via the vibrating layer 11. For example, the fourth auxiliary electrode layer 19 can be electrically connected to the first electrode layer 13 via a fourth contact hole CNT 4 configured (or formed) in the vibrating layer 11. For example, in the second vibrating section 10B, a fourth contact hole CNT 4 superimposed on the fourth auxiliary electrode layer 19 can be configured at the other end (or other side) of the vibrating layer 11. The fourth contact hole CNT 4 can be superimposed on the first electrode layer 13 and the third auxiliary electrode layer 18. Of the plurality of connecting parts 60, the fourth connecting part 64 can be inserted into the fourth contact hole CNT 4. The fourth auxiliary electrode layer 19 and the first electrode layer 13 can be electrically connected via the fourth contact hole CNT 4. The fourth auxiliary electrode layer 19 can be electrically connected to the first electrode layer 13 of the second vibrating section 10B via the fourth connecting part 64.

[0070] Referring to Figures 2 to 8, the first contact hole CNT1 and the third contact hole CNT3 can be separated in the second direction Y. For example, the first contact hole CNT1 and the third contact hole CNT3 can be separated by 180°. The second contact hole CNT2 and the fourth contact hole CNT4 can be separated in the second direction Y. For example, the second contact hole CNT2 and the fourth contact hole CNT4 can be separated by 180°. This allows the second electrode layers 15 of the first vibrating section 10A and the second vibrating section 10B to be configured with the same shape, and the first electrode layers 13 of the first vibrating section 10A and the second vibrating section 10B to be configured with the same shape. As a result, the vibrating device according to the embodiment of this specification can be configured with the first and second electrode layers 13 and 15 without adding an electrode mask.

[0071] According to embodiments of this specification, the vibrating device may include a connecting layer 20 and an auxiliary connecting layer 23. Multiple vibrating parts 10A, 10B or first and second vibrating parts 10A, 10B may be connected to or in contact with one another. Multiple vibrating parts 10A, 10B may be connected via a connecting layer 20 and an auxiliary connecting layer 23 configured between the multiple vibrating parts 10A, 10B. For example, multiple vibrating parts 10A, 10B or first and second vibrating parts 10A, 10B may be in contact with one another via a connecting layer 20 and an auxiliary connecting layer 23.

[0072] The second electrode layer 15 of the first vibrating section 10A may be connected to or electrically connected to the second electrode layer 15 of the adjacent second vibrating section 10B. The connecting layer 20 may be electrically connected to the second electrode layer 15 located between the vibrating layer 11 of the first vibrating section 10A and the vibrating layer 11 of the second vibrating section 10B. For example, the second electrode layer 15 of the first vibrating section 10A may be connected to or electrically connected to the second electrode layer 15 of the second vibrating section 10B via the connecting layer 20.

[0073] According to the embodiments of this specification, the connecting layer 20 may include a conductive material. For example, the conductive material may include copper (Cu) or silver (Ag) material, and the embodiments of this specification are not limited thereto. According to the embodiments of this specification, the connecting layer 20 may consist of a glass frit containing silver (Ag). For example, the glass frit may include PbO or Bi2O3 series materials, and the embodiments of this specification are not limited thereto. For example, the glass frit may include any one of Bi, Zn, Al, B, and Si oxides, and the embodiments of this specification are not limited thereto. According to the embodiments of this specification, the connecting layer 20 may be an internal connecting layer or an electrode connecting layer, and the embodiments of this specification are not limited thereto.

[0074] According to the embodiments of this specification, the connecting layer 20 may include a plurality of protrusions (or a pair of protrusions) 20a, 20b projecting (or extending) from one end (or one side). The plurality of protrusions 20a, 20b may be arranged side by side at a distance from each other. As a result, the connecting layer 20 may not be formed in areas where the plurality of protrusions 20a, 20b are separated from each other.

[0075] In other embodiments of this specification, the connecting layer 20 may include a recess extending from a portion of one end (or side) of the connecting layer 20. The recess may be formed concave along a second direction Y from the central portion of one end (or side) of the connecting layer 20. For example, the recess may be formed concave along the second direction Y from the central portion of one end (or side) of the connecting layer 20 to have a certain length. For example, the recess may be located between a plurality of protrusions (or a pair of protrusions) 20a, 20b, but the embodiments of this specification are not limited thereto. For example, the recess may be a patterned portion or an open portion, since it is a portion where the connecting layer 20 is not formed, but the embodiments of this specification are not limited thereto.

[0076] Referring to Figures 2, 7, and 8, the auxiliary connecting layer 23 may be configured between the first vibrating section 10A and the second vibrating section 10B so as to be electrically isolated from the connecting layer 20. The auxiliary connecting layer 23 may be configured between a plurality of protrusions (or a pair of protrusions) 20a, 20b that protrude (or extend) from one end (or side) of the connecting layer 20. For example, the auxiliary connecting layer 23 may be located on the same layer as the connecting layer 20 and separated from the connecting layer 20. For example, the auxiliary connecting layer 23 may be located in a recess configured between a plurality of protrusions (or a pair of protrusions) 20a, 20b.

[0077] According to the embodiments of this specification, the auxiliary connecting layer 23 may be placed between the third auxiliary electrode layer 18 and the fourth auxiliary electrode layer 19. The auxiliary connecting layer 23 may be superimposed on the first auxiliary electrode layer 16 and the second auxiliary electrode layer 17. The auxiliary connecting layer 23 can electrically connect the third auxiliary electrode layer 18 and the fourth auxiliary electrode layer 19. The auxiliary connecting layer 23 can electrically connect the first electrode layer 13 of the first vibrating section 10A and the first electrode layer 13 of the second vibrating section 10B using the third auxiliary electrode layer 18 and the fourth auxiliary electrode layer 19.

[0078] The auxiliary connecting layer 23 may contain the same materials as the connecting layer 20 and may be constructed using the same process, but the embodiments herein are not limited thereto. For example, the auxiliary connecting layer 23 may contain the same amounts of glass frit and silver (Ag) as the connecting layer 20. As a result, the auxiliary connecting layer 23 contains the same materials as the connecting layer 20, so a redundant explanation of this is omitted.

[0079] Referring to Figures 3 to 8, according to the embodiments herein, each of the multiple vibrating sections 10A, 10B may include at least one connecting section 60. At least one connecting section 60 may be positioned in the respective vibrating layer 11 of the multiple vibrating sections 10A, 10B. At least one connecting section 60 may be inserted into the respective vibrating layer 11 of the multiple vibrating sections 10A, 10B. At least one connecting section 60 may be inserted into contact holes CNT1 to CNT4 formed in the vibrating layer 11. At least one connecting section 60 does not have to overlap with the signal cable 90. At least one connecting section 60 may be separated from the signal cable 90 in a first direction X or a second direction Y.

[0080] According to embodiments of this specification, at least one of the connecting portions 60 may include first to fourth connecting portions 61, 62, 63, and 64. Each of the first to fourth connecting portions 61, 62, 63, and 64 may be inserted into each of the first to fourth contact holes CNT1, CNT2, CNT3, and CNT4. Each of the first to fourth connecting portions 61, 62, 63, and 64 does not have to overlap with the signal cable 90. The first and second connecting portions 61 and 62 may be separated from the signal cable 90 in a first direction X. The third and fourth connecting portions 63 and 64 may be separated from the signal cable 90 in a second direction Y.

[0081] The first vibrating section 10A may include at least one or more connecting sections 60. For example, the first vibrating section 10A may include a first connecting section 61 and a third connecting section 63. The first connecting section 61 and the third connecting section 63 may be configured in the vibrating layer 11 of the first vibrating section 10A. The first connecting section 61 and the third connecting section 63 do not have to overlap. The first connecting section 61 and the third connecting section 63 may be separated.

[0082] The first connecting portion 61 may be positioned on one side of the vibrating layer 11. The first connecting portion 61 may be inserted into the first contact hole CNT 1. The first connecting portion 61 can electrically connect the first auxiliary electrode layer 16 and the second electrode layer 15 of the first vibrating portion 10A. The first connecting portion 61 may be superimposed on the second connecting portion 62 configured on the vibrating layer 11 of the second vibrating portion 10B.

[0083] The first connecting portion 61 may contain the same material as the first auxiliary electrode layer 16 and the second electrode layer 15. The first connecting portion 61 may be formed using the same process as the first auxiliary electrode layer 16 and / or the second electrode layer 15. The first connecting portion 61 may be formed by inserting the metallic material constituting the first auxiliary electrode layer 16 and / or the second electrode layer 15 into the first contact hole CNT1 during the process of forming the first auxiliary electrode layer 16 and / or the second electrode layer 15. The first connecting portion 61 may be separated from the signal cable 90 in a first direction X. The first connecting portion 61 does not have to overlap with the signal cable 90.

[0084] The third connecting portion 63 may be positioned on a side of the vibrating layer 11 different from one side. The third connecting portion 63 may be separated from the first connecting portion 61. The third connecting portion 63 may be separated from the first connecting portion 61 in the second direction Y. The third connecting portion 63 may be inserted into the third contact hole CNT 3. The third connecting portion 63 can electrically connect the third auxiliary electrode layer 18 and the first electrode layer 13 of the first vibrating portion 10A. The third connecting portion 63 may be superimposed on the fourth connecting portion 64 configured in the vibrating layer 11 of the second vibrating portion 10B.

[0085] The third connecting portion 63 may contain the same material as the third auxiliary electrode layer 18 and the first electrode layer 13. The third connecting portion 63 may be formed using the same process as the third auxiliary electrode layer 18 and / or the first electrode layer 13. The third connecting portion 63 may be formed by inserting the metallic material constituting the third auxiliary electrode layer 18 and / or the first electrode layer 13 into the third contact hole CNT3 during the process of forming the third auxiliary electrode layer 18 and / or the first electrode layer 13. The third connecting portion 63 may be separated from the signal cable 90 in the second direction Y. The third connecting portion 63 does not have to overlap with the signal cable 90.

[0086] The second vibrating section 10B may include at least one or more connecting sections 60. For example, the second vibrating section 10B may include a second connecting section 62 and a fourth connecting section 64. The second connecting section 62 and the fourth connecting section 64 may be configured in the vibrating layer 11 of the second vibrating section 10B. The second connecting section 62 and the fourth connecting section 64 do not have to be superimposed.

[0087] The second connecting portion 62 may be positioned on one side of the vibrating layer 11. The second connecting portion 62 may be inserted into the second contact hole CNT 2. The second connecting portion 62 can electrically connect the second auxiliary electrode layer 17 and the second electrode layer 15 of the second vibrating portion 10B. The second connecting portion 62 may be electrically connected to the first connecting portion 61.

[0088] The second connecting portion 62 may contain the same material as the second auxiliary electrode layer 17 and the second electrode layer 15. The second connecting portion 62 may be formed using the same process as the second auxiliary electrode layer 17 and / or the second electrode layer 15. The second connecting portion 62 may be formed by inserting the metallic material constituting the second auxiliary electrode layer 17 and / or the second electrode layer 15 into the second contact hole CNT2 during the process of forming the second auxiliary electrode layer 17 and / or the second electrode layer 15. The second connecting portion 62 may be separated from the signal cable 90 in the first direction X. The second connecting portion 62 does not have to overlap with the signal cable 90.

[0089] The fourth connecting portion 64 may be positioned on one side of the vibrating layer 11 that is different from the other side. The fourth connecting portion 64 may be separated from the second connecting portion 62. The fourth connecting portion 64 may be inserted into the fourth contact hole CNT 4. The fourth connecting portion 64 can electrically connect the fourth auxiliary electrode layer 19 to the first electrode layer 13 of the second vibrating portion 10B. The fourth connecting portion 64 may be electrically connected to the third connecting portion 63.

[0090] The fourth connecting portion 64 may contain the same material as the fourth auxiliary electrode layer 19 and the first electrode layer 13. The fourth connecting portion 64 may be formed using the same process as the fourth auxiliary electrode layer 19 and / or the first electrode layer 13. The fourth connecting portion 64 may be formed by inserting the metallic material constituting the fourth auxiliary electrode layer 19 and / or the first electrode layer 13 into the fourth contact hole CNT4 during the process of forming the fourth auxiliary electrode layer 19 and / or the first electrode layer 13. The fourth connecting portion 64 may be separated from the signal cable 90 in the second direction Y. The fourth connecting portion 64 does not have to overlap with the signal cable 90.

[0091] Referring to Figures 7 and 8, the first electrode layer 13 of the second vibrating section 10B can be electrically connected to the first electrode layer 13 of the first vibrating section 10A. For example, the first electrode layer 13 of the second vibrating section 10B can be electrically connected to the first electrode layer 13 of the first vibrating section 10A via the fourth connecting section 64, the fourth auxiliary electrode layer 19, the auxiliary connecting layer 23, the third auxiliary electrode layer 18, and the third connecting section 63.

[0092] Referring to Figures 3 and 5, the second electrode layer 15 of the second vibrating section 10B can be electrically connected to the second auxiliary electrode layer 17 located on the second surface (or top surface) of the second vibrating section 10B via the second contact hole CNT 2. The second electrode layer 15 of the second vibrating section 10B can be connected to the second electrode layer 15 of the first vibrating section 10A via the connecting layer 20. The second electrode layer 15 of the second vibrating section 10B can be electrically connected to the connecting layer 20, the second electrode layer 15 of the first vibrating section 10A, the first connecting section 61, and the first auxiliary electrode layer 16. This allows the first auxiliary electrode layer 16 and the second auxiliary electrode layer 17 to be electrically connected.

[0093] For example, the first connecting portion 61 and the first auxiliary electrode layer 16 may be omitted. For example, to connect the second electrode layer 15 of the second vibrating portion 10B and the second electrode layer 15 of the first vibrating portion 10A, only the connecting layer 20, the second connecting portion 62, and the second auxiliary electrode layer 17 may be configured. In this case, the second electrode layer 15 of the second vibrating portion 10B can be electrically connected to the second auxiliary electrode layer 17 on the second surface (or top surface) of the second vibrating portion 10B via the second connecting portion 62 and the second contact hole CNT2. The second electrode layer 15 of the second vibrating portion 10B can be connected to the second electrode layer 15 of the first vibrating portion 10A via the connecting layer 20. However, if the first connecting portion 61 and the first auxiliary electrode layer 16 are omitted, a metal pattern masking step may be added because the shapes of the vibrating layers 11 and first electrode layers 13 of the first vibrating portion 10A and the second vibrating portion 10B are different.

[0094] According to the embodiments of this specification, the vibrating device includes a first connecting portion 61 and a first auxiliary electrode layer 16, and by configuring the shapes of the vibrating layers 11 and first electrode layers 13 of the first vibrating portion 10A and the second vibrating portion 10B to be identical, the second electrode layer 15 of the second vibrating portion 10B and the second electrode layer 15 of the first vibrating portion 10A can be electrically connected without the addition of a separate masking process.

[0095] Referring to Figures 2 to 8, the first electrode layer 13 of the second vibrating section 10B can come into contact with the first signal line 92a. This allows the first electrode layer 13 of the second vibrating section 10B and the first electrode layer 13 of the first vibrating section 10A to be electrically connected to the first signal line 92a. The first electrode layer 13 of the second vibrating section 10B, the fourth connecting section 64, the fourth auxiliary electrode layer 19, the auxiliary connecting layer 23, the third auxiliary electrode layer 18, the third connecting section 63, and the first electrode layer 13 of the first vibrating section 10A can all be electrically connected to the first signal line 92a.

[0096] As a result, the embodiments of this specification do not require a separate signal line to be configured on the lower surface (or underside) of the first electrode layer 13 of the first vibrating section 10A, and the same signal can be applied to the first electrode layer 13 of the first vibrating section 10A and the first electrode layer 13 of the second vibrating section 10B using a single signal line (for example, the first signal line).

[0097] According to the embodiments of this specification, the second auxiliary electrode layer 17 may be in contact with the second signal line 92b. This allows the second electrode layer 15 of the second vibrating section 10B and the second electrode layer 15 of the first vibrating section 10A to be electrically connected to the second signal line 92b. The second auxiliary electrode layer 17, the second connecting section 62, the second electrode layer 15 of the second vibrating section 10B, the connecting layer 20, the second electrode layer 15 of the first vibrating section 10A, the first connecting section 61, and the first auxiliary electrode layer 16 can all be electrically connected to the second signal line 92b. For example, the second electrode layer 15 of the first vibrating section 10A and the second electrode layer 15 of the second vibrating section 10B may be the intermediate electrode layer, the internal electrode layer, and the common electrode layer of the vibration generating section 10, but the embodiments of this specification are not limited thereto.

[0098] According to the embodiments of this specification, the vibration layer 11 of the first vibration section 10A and the vibration layer 11 of the second vibration section 10B may be polarized (or polled) in the same direction or in opposite (or other) directions. For example, the polarization direction (or polling direction) formed in the vibration layer 11 of the first vibration section 10A may be different from or opposite to the polarization direction (or polling direction) formed in the vibration layer 11 of the second vibration section 10B.

[0099] According to the embodiments of this specification, the second electrode layer 15 of the first vibrating section 10A and the second electrode layer 15 of the second vibrating section 10B are connected to each other. As a result, when the polarization direction (or polling direction) formed in the vibrating layer 11 of the first vibrating section 10A is opposite to the polarization direction (or polling direction) formed in the vibrating layer 11 of the second vibrating section 10B, the first vibrating section 10A and the second vibrating section 10B can be displaced (or vibrate or driven) in the same direction, thereby maximizing the vibration amplitude (displacement amplitude or drive amplitude) of the vibration generating section 10. This can improve the sound pressure of the vibration generating section 10.

[0100] The vibration generating unit 10 according to one embodiment of this specification may further include a first cover member 30 and a second cover member 50.

[0101] The first cover member 30 may be configured to cover or protect one surface of the vibration generating unit 10. For example, in the vibration generating unit 10, one surface may be the bottom surface, rear surface, last surface, back surface, or back portion. For example, the first cover member 30 may be configured to cover or protect a first surface of the vibration generating unit 10. For example, in the vibration generating unit 10, the first surface may be the bottom surface, rear surface, last surface, back surface, or back portion.

[0102] The first cover member 30 may be configured to cover the first vibrating portion 10A of the vibration generating portion 10. For example, the first cover member 30 may be configured to cover the first electrode layer 13, the first auxiliary electrode layer 16, and the third auxiliary electrode layer 18 of the first vibrating portion 10A. Thus, the first cover member 30 can protect the first surface of the vibration generating portion 10 and the first electrode layer 13, the first auxiliary electrode layer 16, and the third auxiliary electrode layer 18 of the first vibrating portion 10A.

[0103] The first cover member 30 according to one embodiment of this specification may include an adhesive member. For example, the first cover member 30 may include a base cover member and an adhesive member located on the base cover member that is connected or bonded to the first surface of the vibration generating part 10 and the first electrode layer 13 of the first vibration part 10A. For example, the adhesive member may include an electrically insulating material that is compressible and resilient while having adhesive properties.

[0104] In other embodiments of this specification, the first cover member 30 may be connected or bonded to the first surface of the vibration generating part 10 via an adhesive layer 40. For example, the first cover member 30 may be connected or bonded to the first surface of the vibration generating part 10 and at least a portion of the first electrode layer 13 of the first vibrating part 10A via a first adhesive layer 41 of the adhesive layer 40. For example, the first cover member 30 may be connected or bonded to the first surface of the vibration generating part 10 and at least a portion of the first electrode layer 13 of the first vibrating part 10A by a film lamination process mediated by the first adhesive layer 41.

[0105] The second cover member 50 may be configured to cover or protect a surface of the vibration generating unit 10 that is different from one surface. For example, in the vibration generating unit 10, the other surface may be the top surface, the uppermost surface, the front surface, or the front portion. For example, the second cover member 50 may be configured to cover or protect a second surface of the vibration generating unit 10. For example, in the vibration generating unit 10, the second surface may be the top surface, the uppermost surface, the front surface, or the front portion.

[0106] The second cover member 50 may be configured to cover the second vibrating portion 10B of the vibration generating portion 10. For example, the second cover member 50 may be configured to cover the first electrode layer 13, the second auxiliary electrode layer 17, and the fourth auxiliary electrode layer 19 of the second vibrating portion 10B. Thus, the second cover member 50 can protect the second surface of the vibration generating portion 10 and the first electrode layer 13, the second auxiliary electrode layer 17, and the fourth auxiliary electrode layer 19 of the second vibrating portion 10B.

[0107] The second cover member 50 according to one embodiment of this specification may include an adhesive member. For example, the second cover member 50 may include a base cover member and an adhesive member located on the base cover member that is connected or bonded to the second surface of the vibration generating part 10 and the first electrode layer 13 of the second vibration part 10B. For example, the adhesive member may include an electrically insulating material that is compressible and resilient while having adhesive properties.

[0108] In other embodiments of this specification, the second cover member 50 may be connected or bonded to the second surface of the vibration generating section 10 via an adhesive layer 40. For example, the second cover member 50 may be connected or bonded to the second surface of the vibration generating section 10 and at least a portion of the first electrode layer 13 of the second vibration section 10B via a second adhesive layer 42 of the adhesive layer 40. For example, the second cover member 50 may be connected or bonded to the second surface of the vibration generating section 10 and at least a portion of the first electrode layer 13 of the second vibration section 10B by a film lamination process mediated by the second adhesive layer 42.

[0109] Each of the first cover member 30 and the second cover member 50 in the embodiments of this specification may include one or more materials from plastic, fiber, cloth, paper, leather, rubber, carbon, and wood, but the embodiments of this specification are not limited thereto. For example, each of the first cover member 30 and the second cover member 50 may include the same or different materials. For example, each of the first cover member 30 and the second cover member 50 may be a polyimide film, a polyethylene naphthalate film, or a polyethylene terephthalate film, but the embodiments of this specification are not limited thereto.

[0110] The first adhesive layer 41 and the second adhesive layer 42 (or adhesive layer 40) according to the embodiments of this specification may include an electrically insulating material that is compressible and resilient while being adhesive. For example, the first adhesive layer 41 and the second adhesive layer 42 (or adhesive layer 40) may include inkjet and heat / photocurable adhesives. For example, the first adhesive layer 41 and the second adhesive layer 42 (or adhesive layer 40) may include epoxy resin, acrylic resin, silicone resin, urethane resin, PSA (pressure sensitive adhesive), OCA (optically clear adhesive), or OCR (optically clear resin), but the embodiments of this specification are not limited thereto. For example, the first adhesive layer 41 and the second adhesive layer 42 or adhesive layer 40 may be configured to surround or completely surround the vibration generating part 10. The first adhesive layer 41 and the second adhesive layer 42 or adhesive layer 40 may be configured to cover or surround all surfaces of the vibration generating part 10. For example, the vibration generating unit 10 may be inserted (or housed) inside the adhesive layer 40, or embedded in the adhesive layer 40.

[0111] According to the embodiments of this specification, either the first cover member 30 or the second cover member 50 may be omitted. For example, of the first cover member 30 and the second cover member 50, the first cover member 30 may be omitted. When the first cover member 30 is omitted, the first surface of the vibration generating part 10 may be covered or surrounded by the adhesive layer 40 or the first adhesive layer 41. This ensures that the first surface of the vibration generating part 10 is covered or protected by the adhesive layer 40 or the first adhesive layer 41. When the first cover member 30 is omitted, the second cover member 50 may be a cover member, a cover film, a protective member, or a protective film.

[0112] The vibration device according to the embodiments of this specification may further include a signal cable 90.

[0113] The signal cable 90 can be electrically connected to multiple vibration sections 10A and 10B. The signal cable 90 can be electrically connected to the first and second vibration sections 10A and 10B of the vibration generating section 10 on one side of the vibration generating section 10. The signal cable 90 can be electrically connected to the first and second vibration sections 10A and 10B between the first cover member 30 and the second cover member 50.

[0114] The termination (or end) of the signal cable 90 may be positioned or inserted (or housed) in the portion between one side edge of the first cover member 30 and one side edge of the second cover member 50. The side edge of the first cover member 30 and the side edge of the second cover member 50 can house a portion of the signal cable 90 or cover the signal cable 90 from above and below. In this way, the signal cable 90 can be integrated with the vibration generating unit 10. For example, the vibration device according to the embodiment of this specification may be a vibration device in which the signal cable 90 is integrated. For example, the signal cable 90 may consist of a flexible cable, a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board, a flexible multilayer printed circuit, or a flexible multilayer printed circuit board, but the embodiments of this specification are not limited thereto.

[0115] The signal cable 90 according to the embodiments of this specification may include a base member 91 and a plurality of signal lines 92a, 92b. For example, the signal cable 90 may include a base member 91, a first signal line 92a, and a second signal line 92b.

[0116] The base member 91 may be made of a transparent or opaque plastic material. For example, the base member 91 may be made of one or more synthetic resins including fluororesins, polyimide resins, polyurethane resins, polyester resins, polyethylene resins, and polypropylene resins, but the embodiments herein are not limited thereto. The base member 91 may also be a base film or a base insulating film, and the embodiments herein are not limited thereto.

[0117] The base member 91 has a constant width along the first direction X and can be extended along the second direction Y which intersects the first direction X.

[0118] Each of the first and second signal lines 92a and 92b is arranged on the first surface of the base member 91 so as to be aligned in the second direction Y, and may be spaced apart from each other or separated from each other along the first direction X. Each of the first and second signal lines 92a and 92b may be arranged parallel to each other on the first surface of the base member 91. For example, each of the first and second signal lines 92a and 92b may be embodied in a line shape by patterning a metal layer (or conductive layer) formed or deposited on the first surface of the base member 91.

[0119] The respective terminations (or ends) of the first and second signal lines 92a and 92b can be individually bent or curved by separating them from each other.

[0120] According to the embodiments of this specification, the termination of the first signal line 92a may be positioned between the second cover member 50 and the second surface of the vibration generating unit 10. For example, the termination of the first signal line 92a may be configured to be electrically connected to the uppermost electrode layer (or first electrode layer) 13 of the vibration generating unit 10. For example, the termination of the first signal line 92a electrically connected to the uppermost electrode layer (or first electrode layer) 13 of the vibration generating unit 10 may be covered by an adhesive layer 40 or a second adhesive layer 42, but the embodiments of this specification are not limited thereto.

[0121] The termination of the first signal line 92a can be electrically connected to at least a portion of the first electrode layer 13 of the second vibration section 10B, which is the uppermost electrode layer 13 of the vibration generating section 10. For example, the first signal line 92a can be electrically connected to the first electrode layer 13 of the second vibration section 10B and the first electrode layer 13 of the first vibration section 10A. The first signal line 92a can be electrically connected to the first electrode layer 13 of the second vibration section 10B, the fourth connecting section 64, the fourth auxiliary electrode layer 19, the auxiliary connecting layer 23, the third auxiliary electrode layer 18, the third connecting section 63, and the first electrode layer 13 of the first vibration section 10A.

[0122] As a result, the first signal line 92a can supply the drive signal supplied from the vibration drive circuit to both the first electrode layer 13 of the second vibration section 10B and the first electrode layer 13 of the first vibration section 10A in common. Consequently, the vibration device according to the embodiment of this specification may not have two separate signal lines connected to the first electrode layer 13 of the first vibration section 10A and the first electrode layer 13 of the second vibration section 10B, respectively. Therefore, the same signal can be applied to both the first electrode layer 13 of the first vibration section 10A and the first electrode layer 13 of the second vibration section 10B using a single first signal line 92a.

[0123] According to the embodiments of this specification, the signal cable 90 does not need to overlap with the connecting portion 60.

[0124] The first signal line 92a does not have to overlap with the third connecting portion 63 and the fourth connecting portion 64. The first signal line can be separated from the third connecting portion 63 and the fourth connecting portion 64 in the second direction Y. The first signal line 92a does not have to overlap with the third contact hole CNT3 and the fourth contact hole CNT4 into which the third connecting portion 63 and the fourth connecting portion 64 are inserted, respectively. The first signal line 92a can be separated from the third contact hole CNT3 and the fourth contact hole CNT4 into which the third connecting portion 63 and the fourth connecting portion 64 are inserted, respectively, in the second direction Y.

[0125] For example, when contact holes are formed in a vibrating layer, electrode material to be used as an electrode layer is filled into the contact holes, and the upper and lower electrode layers are connected by the contact holes. However, during the ceramic firing process, the electrode material filled into the contact holes may shrink, forming a recessed groove in the upper part of the contact holes. When a signal cable is connected to the upper part of the contact holes, an air gap may be formed between the upper part of the contact holes and the signal cable by the groove. In this case, during the polarization process in which a high voltage is applied to impart piezoelectricity to the vibrating device, an arc discharge may occur between the contact holes and the signal cable due to the air gap. When an arc discharge occurs through the air gap, a burnt defect may occur in the vibrating device. This burnt defect may cause damage such as cracks on the surface of the electrode layer in the vibration generating part and the vibrating layer (or piezoelectric ceramic). To prevent this, a separate process of filling the contact holes can be added, but this process is complex and may increase manufacturing costs.

[0126] According to the embodiments of this specification, the first signal line 92a does not need to overlap the third connecting portion 63 and the fourth connecting portion 64, or the third contact hole CNT3 and the fourth contact hole CNT4. This can prevent an air gap from forming between the third contact hole CNT3 and the fourth contact hole CNT4 and the first signal line 92a.

[0127] This can suppress burnt defects and cracks in the vibrating device without increasing process and manufacturing costs. By preventing defects such as cracks in the vibrating device, yield can be improved, and the manufacturing process can be optimized through a reduction in production energy.

[0128] According to the embodiments of this specification, the termination of the second signal line 92b may be positioned between the second cover member 50 and the second surface of the vibration generating unit 10. For example, the termination of the second signal line 92b may be configured to be electrically connected to a second auxiliary electrode layer 17 which is electrically separated from the uppermost electrode layer 13 of the vibration generating unit 10. For example, the termination of the second signal line 92b electrically connected to the second auxiliary electrode layer 17 of the vibration generating unit 10 may be covered by an adhesive layer 40 or a second adhesive layer 42, but the embodiments of this specification are not limited thereto. For example, the termination of the second signal line 92b electrically connected to the second auxiliary electrode layer 17 of the vibration generating unit 10 may not be covered by an adhesive layer 40 or a second adhesive layer 42, but may be in contact with or directly in contact with the second cover member 50.

[0129] The termination of the second signal line 92b may be electrically connected (or coupled) to a second auxiliary electrode layer 17 which is electrically separated from the uppermost electrode layer 13 of the vibration generating unit 10. For example, the termination of the second signal line 92b may be configured to be electrically coupled to at least a portion of the second auxiliary electrode layer 17. For example, the second signal line 92b may be electrically coupled to the second auxiliary electrode layer 17, the second coupling portion 62, the second electrode layer 15 of the second vibration unit 10B, the coupling layer 20, the second electrode layer 15 of the first vibration unit 10A, the first coupling portion 61, and the first auxiliary electrode layer 16. For example, the second signal line 92b may be coupled to the second electrode layer 15 of the second vibration unit 10B and the second electrode layer 15 of the first vibration unit 10A via the second auxiliary electrode layer 17.

[0130] The signal applied to the second signal line 92b can be supplied to the second electrode layer 15 of the first vibrating section 10A via the second auxiliary electrode layer 17, the second connecting section 62, the second electrode layer 15 of the second vibrating section 10B, and the connecting layer 20. This allows the second signal line 92b to supply the drive signal supplied from the vibration drive circuit to both the second electrode layer 15 of the second vibrating section 10B and the second electrode layer 15 of the first vibrating section 10A.

[0131] The vibration device according to the embodiment of this specification does not have two separate signal lines connected to the second electrode layer 15 of the first vibration section 10A and the second electrode layer 15 of the second vibration section 10B, respectively, and can apply the same signal to the second electrode layer 15 of the first vibration section 10A and the second electrode layer 15 of the second vibration section 10B using a single second signal line 92b.

[0132] According to the embodiments herein, the second signal line 92b does not have to overlap with the first connecting portion 61 and the second connecting portion 62. The second signal line 92b may be separated from the first connecting portion 61 and the second connecting portion 62 in a first direction X. The second signal line 92b does not have to overlap with the first contact hole CNT1 and the second contact hole CNT2 into which the first connecting portion 61 and the second connecting portion 62 are inserted, respectively. The second signal line 92b may be separated from the first contact hole CNT1 and the second contact hole CNT2 into which the first connecting portion 61 and the second connecting portion 62 are inserted, respectively, in a first direction X.

[0133] The first contact hole CNT1 and the second contact hole CNT2 allow the first auxiliary electrode layer 16 and the second auxiliary electrode layer 17 to be formed concave in the Z-axis direction in the region overlapping with the first contact hole CNT1 and the second contact hole CNT2. The region where the first auxiliary electrode layer 16 and the second auxiliary electrode layer 17 overlap with the first contact hole CNT1 and the second contact hole CNT2 can be formed concave. When the first connecting portion 61 and the second connecting portion 62 are arranged in the concave region, an air gap can be formed.

[0134] According to the embodiments of this specification, by ensuring that the second signal line 92b does not overlap with the first connecting portion 61 and the second connecting portion 62, or the first contact hole CNT1 and the second contact hole CNT2, it is possible to prevent an air gap from occurring between the first contact hole CNT1 and the second contact hole CNT2 and the second signal line 92b.

[0135] This can suppress burnt defects and cracks in the vibrating device without increasing process and manufacturing costs. By preventing defects such as cracks in the vibrating device, yield can be improved, and the manufacturing process can be optimized through a reduction in production energy.

[0136] In the first vibrating section 10A, the first electrode layer 13 can receive a drive signal via the first signal line 92a, and the second electrode layer 15 can receive a drive signal via the second signal line 92b. As a result, the first vibrating section 10A can vibrate (displace or be driven) by repeatedly contracting and / or expanding alternately due to the inverse piezoelectric effect generated in the vibrating layer 11 by the drive signal.

[0137] In the second vibrating section 10B, the first electrode layer 13 can receive a drive signal via the first signal line 92a, and the second electrode layer 15 can receive a drive signal via the second signal line 92b. As a result, the second vibrating section 10B can vibrate (displace or be driven) by repeatedly contracting and / or expanding alternately due to the inverse piezoelectric effect generated in the vibrating layer 11 by the drive signal.

[0138] The first vibrating section 10A and the second vibrating section 10B can each bend (displace or drive) to the same shape as the other. This allows the vibration generating section 10 or the vibration device to be maximized by adding the vibration amplitude (displacement or drive amplitude) of the first vibrating section 10A and the vibration amplitude (displacement or drive amplitude) of the second vibrating section 10B. For example, the vibration generating section 10 or the vibration device may have improved vibration efficiency or vibration characteristics, and its vibration amplitude (displacement or drive amplitude) may be maximized, as the vibrations of the first vibrating section 10A and the second vibrating section 10B mutually reinforce each other. This can improve acoustic characteristics, including low-frequency sounds, and / or sound pressure characteristics.

[0139] The signal cable 90 may include first and second extensions 91a, 91b that support the respective terminations of the first and second signal lines 92a, 92b, which are separated from each other. For example, each of the first and second extensions 91a, 91b may be separated from each other from one side edge of the second cover member 50. This allows the respective terminations (or ends) of the first and second signal lines 92a, 92b to bend or curve individually by being separated from each other.

[0140] According to the embodiments herein, the first and second extensions 91a and 91b of the signal cable 90 may be omitted, respectively. For example, the first and second signal lines 92a and 92b may each protrude or extend from the base member 91 in a finger shape and be electrically connected to or in contact with the electrode layers 13 and 17, respectively, with one side edge of the second cover member 50. For example, the respective terminations of the first and second signal lines 92a and 92b may be electrically connected to or in contact with the electrode layers 13 and 17 via conductive double-sided tape, thereby ensuring adhesion to the electrode layers 13 and 17.

[0141] The signal cable 90 according to the embodiments of this specification may further include an insulating member 93.

[0142] The insulating member 93 may be positioned on the first surface of the base member 91 so as to cover the remaining first and second signal lines 92a, 92b, respectively, excluding the termination of the signal cable 90. The insulating member 93 may be a protective layer, coverlay, coverlay layer, cover film, insulating film, or solder mask, and the embodiments herein are not limited thereto.

[0143] The terminal (or end) of the signal cable 90 is inserted (or housed) and fixed between the second cover member 50 and the vibration generating unit 10, thereby preventing poor connection between the vibration generating unit 10 and the signal cable 90 due to movement of the signal cable 90.

[0144] In the embodiment described herein, the first and second signal lines 92a and 92b of the signal cable 90 are inserted between the second cover member 50 and the vibration generating unit 10, eliminating the need for a soldering process for electrical connection between the vibration generating unit 10 and the signal cable 90. This simplifies the structure and manufacturing process of the vibration device.

[0145] Furthermore, the vibration device according to the embodiment of this specification includes a plurality of vibrating parts 10A, 10B that are superimposed on each other or stacked on each other so as to vibrate (or displace or drive) in the same direction to each other. This improves the vibration efficiency or vibration characteristics of the vibration device, maximizes the vibration amplitude (displacement amplitude or drive amplitude), and improves the acoustic characteristics, including low-frequency acoustics, and / or sound pressure characteristics.

[0146] Furthermore, in the embodiment of this specification, since the signal lines are not configured between the multiple vibrating parts 10A and 10B, the thickness of the vibrating device and the step difference caused by the signal lines can be reduced. In addition, in the embodiment of this specification, cracks that occur when the first cover member 30 and the second cover member 50 adhere together can be prevented by the step difference that occurs when the signal lines are connected. For example, in the embodiment of this specification, the first and second signal lines 92a and 92b are both configured on the upper surface of the vibration generating part 10. This prevents the ceramic constituting the first and second vibrating parts 10A and 10B from cracking or other defects such as cracks occurring due to the adhesion of the first and second vibrating parts 10A and 10B, which would occur if the signal lines were configured between the first and second vibrating parts 10A and 10B.

[0147] Figure 9 shows a vibrating device according to another embodiment of this specification. Figure 10 is a cross-sectional view taken along the line G-G' in Figure 9. Figure 11 is a cross-sectional view taken along the line H-H' in Figure 9. Figure 12 is a cross-sectional view taken along the line I-I' in Figure 9. Figure 13 is a cross-sectional view taken along the line J-J' in Figure 9. This is a vibrating device in which the positions of the contact holes and connecting parts have been changed compared to the vibrating devices shown in Figures 1 to 8. Therefore, in the following description, only the contact holes, connecting parts, and related components will be described, and the remaining components will be given the same reference numerals as in Figures 1 to 8, and any redundant explanations will be briefly described or omitted.

[0148] Referring to Figures 9 to 13, other embodiments of the vibration device according to this specification may include a vibration generating unit 10, a connecting layer 20, a connecting unit 60, and a signal cable 90.

[0149] In another embodiment of this specification, in the first vibrating section 10A, the first electrode layer 13 may include a plurality of protrusions (or a pair of protrusions) 13a, 13b protruding (or extending) from one end (or one side). In the first vibrating section 10A, the second electrode layer 15 may include a plurality of protrusions (or a pair of protrusions) 15a, 15b protruding (or extending) from one end (or one side). In the first vibrating section 10A, the plurality of protrusions (or a pair of protrusions) 13a, 13b of the first electrode layer 13 and the plurality of protrusions (or a pair of protrusions) 15a, 15b of the second electrode layer 15 may all be configured at one end (or one side) of the vibration generating section 10.

[0150] In the second vibrating section 10B, the first electrode layer 13 may include a plurality of protrusions (or a pair of protrusions) 13a, 13b protruding (or extending) from one end (or one side). In the second vibrating section 10B, the second electrode layer 15 may include a plurality of protrusions (or a pair of protrusions) 15a, 15b protruding (or extending) from one end (or one side). In the second vibrating section 10B, the plurality of protrusions (or a pair of protrusions) 13a, 13b of the first electrode layer 13 and the plurality of protrusions (or a pair of protrusions) 15a, 15b of the second electrode layer 15 may all be configured at one end (or one side) of the vibration generating section 10.

[0151] According to other embodiments of this specification, the connecting layer 20 may include a plurality of protrusions (or a pair of protrusions) 20a, 20b projecting (or extending) from one end (or one side). The plurality of protrusions 20a, 20b may be arranged side by side at a distance from each other. In this way, the connecting layer 20 may not be formed in areas where the plurality of protrusions 20a, 20b are separated from each other.

[0152] The auxiliary connecting layer 23 may be configured between the first vibrating section 10A and the second vibrating section 10B so as to be electrically isolated from the connecting layer 20. The auxiliary connecting layer 23 may be placed between the third auxiliary electrode layer 18 and the fourth auxiliary electrode layer 19. The auxiliary connecting layer 23 may be superimposed on the first auxiliary electrode layer 16 and the second auxiliary electrode layer 17.

[0153] According to other embodiments of this specification, the vibration generating unit 10 may include a plurality of auxiliary electrode layers 16, 17, 18, and 19. Each of the plurality of auxiliary electrode layers 16, 17, 18, and 19 may be configured at one end (or one side) of the vibration generating unit 10.

[0154] According to other embodiments of this specification, the first vibrating portion 10A includes a first contact hole CNT1 and a third contact hole CNT3 spaced apart from each other on one side of the vibrating layer 11, and the second vibrating portion 10B may include a second contact hole CNT2 and a fourth contact hole CNT4 spaced apart from each other on one side of the vibrating layer 11. The first vibrating portion 10A may include a first contact hole CNT1 and a third contact hole CNT3 aligned in a first direction X at one end (or one side) of the vibrating layer 11. The second vibrating portion 10B may include a second contact hole CNT2 and a fourth contact hole CNT4 aligned in a first direction X at one end (or one side) of the vibrating layer 11. Each of the first to fourth connecting portions 61, 62, 63, and 64 may be inserted into each of the first to fourth contact holes CNT1 to CNT4.

[0155] In the first vibrating section 10A, the first auxiliary electrode layer 16 may be configured (or formed) below the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. For example, in the first vibrating section 10A, a first contact hole CNT 1 superimposed on the first auxiliary electrode layer 16 may be configured at one end (or one side) of the vibrating layer 11. The first connecting portion 61 may be inserted into the first contact hole CNT 1. The first auxiliary electrode layer 16 may be electrically connected to the second electrode layer 15 of the first vibrating section 10A via the first connecting portion 61.

[0156] In the first vibrating section 10A, the third auxiliary electrode layer 18 may be configured (or formed) on the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. For example, in the first vibrating section 10A, a third contact hole CNT 3 superimposed on the third auxiliary electrode layer 18 may be configured at one end (or one side) of the vibrating layer 11. The third contact hole CNT 3 may be separated from the first contact hole CNT 1. The third contact hole CNT 3 may be positioned parallel to the first contact hole CNT 1 in a first direction X. The third connecting portion 63 may be inserted into the third contact hole CNT 3. The third connecting portion 63 may be separated from the first connecting portion 61. The third connecting portion 63 may be positioned parallel to the first connecting portion 61 in a first direction X. The third auxiliary electrode layer 18 may be electrically connected to the first electrode layer 13 of the first vibrating section 10A via the third connecting portion 63.

[0157] In the second vibrating section 10B, the second auxiliary electrode layer 17 may be configured (or formed) on the vibrating layer 11 so as to be electrically isolated from the first electrode layer 13. For example, in the second vibrating section 10B, a second contact hole CNT 2 superimposed on the second auxiliary electrode layer 17 may be configured at one end (or one side) of the vibrating layer 11. The second connecting portion 62 may be inserted into the second contact hole CNT 2. The second auxiliary electrode layer 17 may be electrically connected to the second electrode layer 15 of the second vibrating section 10B via the second connecting portion 62.

[0158] In the second vibrating section 10B, the fourth auxiliary electrode layer 19 may be configured (or formed) below the vibrating layer 11 so as to be electrically isolated from the second electrode layer 15. For example, in the second vibrating section 10B, a fourth contact hole CNT 4 superimposed on the fourth auxiliary electrode layer 19 may be configured at one end (or one side) of the vibrating layer 11. The fourth contact hole CNT 4 may be separated from the second contact hole CNT 2. The fourth contact hole CNT 4 may be positioned parallel to the second contact hole CNT 2 in a first direction X. The fourth connecting portion 64 may be inserted into the fourth contact hole CNT 4. The fourth connecting portion 64 may be separated from the second connecting portion 62. The fourth connecting portion 64 may be positioned parallel to the second connecting portion 62 in a first direction X. The fourth auxiliary electrode layer 19 may be electrically connected to the first electrode layer 13 of the second vibrating section 10B via the fourth connecting portion 64.

[0159] Each of the first to fourth contact holes CNT1 to CNT4 may be formed in the remaining portion of the vibrating layer 11, excluding the edges. A separation region SA for attaching the signal cable 90 may be formed between each of the first to fourth contact holes CNT1 to CNT4 and one side surface of the vibrating layer 11. For example, the separation region SA does not necessarily have to contain the first to fourth contact holes CNT1 to CNT4.

[0160] According to other embodiments of this specification, the signal cable 90 does not have to overlap with each of the first to fourth contact holes CNT1 to CNT4. The signal cable 90 may be separated from each of the first to fourth contact holes CNT1 to CNT4 in the second direction Y. The signal cable 90 does not have to overlap with each of the first to fourth connecting parts 61, 62, 63, and 64. The signal cable 90 may be separated from each of the first to fourth connecting parts 61, 62, 63, and 64 in the second direction Y.

[0161] The signal cable 90 can be connected to the separation region SA between each of the first to fourth contact holes CNT1 to CNT4 and the side surface of the vibration layer 11. The signal cable 90 can be attached to the separation region SA between each of the first to fourth contact holes CNT1 to CNT4 and the side surface of the vibration layer 11.

[0162] The first signal line 92a does not overlap with the third contact hole CNT3 and the fourth contact hole CNT4, and may contact the separation region SA. The first signal line 92a does not overlap with the third connecting portion 63 and the fourth connecting portion 64, and may contact the separation region SA. The second signal line 92b does not overlap with the first contact hole CNT1 and the second contact hole CNT2, and may contact the separation region SA. The second signal line 92b does not overlap with the first connecting portion 61 and the second connecting portion 62, and may contact the separation region SA.

[0163] According to other embodiments of this specification, an air gap between the third contact hole CNT3 and the fourth contact hole CNT4 and the first signal line 92a can be prevented by ensuring that the first signal line 92a does not overlap with the third connecting portion 63 and the fourth connecting portion 64, or the third contact hole CNT3 and the fourth contact hole CNT4. Furthermore, an air gap between the first contact hole CNT1 and the second contact hole CNT2 and the second signal line 92b can be prevented by ensuring that the second signal line 92b does not overlap with the first connecting portion 61 and the second connecting portion 62, or the first contact hole CNT1 and the second contact hole CNT2.

[0164] This can suppress burnt defects and cracks in the vibration device without increasing the manufacturing process or costs. By preventing defects such as cracks in the vibration device, yield can be improved, and the manufacturing process can be optimized through a reduction in production energy.

[0165] Figure 14 is a diagram showing an apparatus according to an embodiment of this specification. Figure 15 is a cross-sectional view taken along the line K-K' shown in Figure 14, according to an embodiment of this specification.

[0166] Referring to Figures 14 and 15, the apparatus according to the embodiments of this specification may include a manual vibrating member 100 and one or more vibration generating devices 200.

[0167] The "apparatus" in the embodiments described herein may be a display device, an audio device, an audio generator, a sound bar, analog signage, or digital signage, but the embodiments described herein are not limited to these.

[0168] The display device may include a display panel containing a plurality of pixels that embody a black and white or color image, and a drive unit for driving the display panel. The images in the embodiments of this specification may include electronic images, digital images, still images, or video images, and the embodiments of this specification are not limited thereto. For example, the display panel may be a liquid crystal display panel, an organic light-emitting display panel, a light-emitting diode display panel, an electrophoretic display panel, an electron-wetting display panel, a micro-light-emitting diode display panel, or a quantum point light-emitting display panel, and the embodiments of this specification are not limited thereto. For example, in an organic light-emitting display panel, pixels may include organic light-emitting elements such as an organic light-emitting layer, and pixels may be sub-pixels that embody one of a plurality of colors that constitute a color image. Accordingly, the “apparatus” in the embodiments of this specification may also include complete products or final products including display panels such as liquid crystal display panels or organic light-emitting display panels, such as notebook computers, TVs, computer monitors, equipment apparatuses including other forms of vehicle or automobile apparatuses or vehicles, and set electronic apparatuses or set devices such as smartphones or electronic pads.

[0169] Analog signage can be an advertising sign, poster, or information board. Analog signage can include content such as text, pictures, and symbols. The content can be positioned so that it is visible from the side of the device's manual vibrating member 100. The content can be directly attached to the manual vibrating member 100, or a medium such as paper to which the content is attached by printing or other means may also adhere to the manual vibrating member 100.

[0170] The manual vibrating member 100 can be vibrated by the drive (or vibration) of one or more vibration generating devices 200. For example, the manual vibrating member 100 can generate one or more of vibrations and / or sounds by the drive of one or more vibration generating devices 200.

[0171] The manual vibration member 100 according to the embodiments of this specification may be a display panel including a display unit (or screen) having a plurality of pixels that embody a black and white or color image. Thus, the manual vibration member 100 can generate one or more vibrations and / or sounds by driving one or more vibration generators 200. For example, the manual vibration member 100 can generate or output sounds synchronized with the image on the display unit by vibrating when driven by the vibration generators 200 while displaying an image on the display unit. For example, the manual vibration member 100 may be a vibrating object, a display unit, a display panel, a signage panel, a manual vibration plate, a front cover, a front member, a vibration panel, a sound panel, a manual vibration panel, an acoustic output plate, an acoustic vibration plate, or an image screen, but the embodiments of this specification are not limited thereto.

[0172] According to other embodiments of this specification, the manual vibrating member 100 may be a vibrating plate comprising a metallic material having material properties suitable for vibrating by one or more vibration generating devices 200 and emitting sound, or a non-metallic material (or composite non-metallic material). For example, the manual vibrating member 100 may be a vibrating plate comprising one or more materials from among metal, plastic, paper, fiber, cloth, wood, leather, rubber, glass, carbon, and mirror. For example, paper may be speaker cone paper. For example, cone paper may be pulp or foamed plastic, but is not limited to these embodiments of this specification.

[0173] Other embodiments of the manual vibrator 100 described herein may include a display panel having pixels for displaying images, or a non-display panel. For example, the manual vibrator 100 may include one or more of the following: a display panel having pixels for displaying images, a screen panel from which images are projected from a display device, a lighting panel, a signage panel, interior materials for a means of transport, exterior materials for a means of transport, glass windows for a means of transport, seat interior materials for a means of transport, ceiling materials for a means of transport, ceiling materials for a building, interior materials for a building, glass windows for a building, interior materials for an aircraft, glass windows for an aircraft, and a mirror, but the embodiments described herein are not limited thereto. For example, a non-display panel may include a light-emitting diode lighting panel (or device), an organic light-emitting lighting panel (or device), or an inorganic light-emitting lighting panel (or device), but the embodiments described herein are not limited thereto.

[0174] One or more vibration generators 200 may be configured to vibrate the manual vibrating member 100. One or more vibration generators 200 may be configured to be connected to the rear surface 100a of the manual vibrating member 100 via a connecting member 150. In this way, one or more vibration generators 200 can generate or output one or more vibrations and sounds by vibrating the manual vibrating member 100.

[0175] One or more vibration generating devices 200 may include one or more of the vibration devices described with reference to Figures 1 to 13. Therefore, the descriptions of the vibration devices shown in Figures 1 to 13 may be included in the descriptions of the vibration generating devices 200 shown in Figures 14 and 15; thus, the same reference numerals are assigned to them, and redundant descriptions are omitted.

[0176] The connecting member 150 may be positioned between at least a portion of the vibration generator 200 and the manual vibration member 100. The connecting member 150 may be connected between at least a portion of the vibration generator 200 and the manual vibration member 100. In the embodiments of this specification, the connecting member 150 may be connected between the central part of the vibration generator 200, excluding its edges, and the manual vibration member 100. For example, the connecting member 150 may be connected between the central part of the vibration generator 200 and the manual vibration member 100 by a partial attachment method. Since the central part (or middle part) of the vibration generator 200 is the part that becomes the center of vibration, the vibration of the vibration generator 200 can be efficiently transmitted to the manual vibration member 100 via the connecting member 150. Since the edge of the vibration generator 200 is not connected to the connecting member 150 and / or the manual vibration member 100, and is lifted away from both the connecting member 150 and the manual vibration member 100, when the vibration generator 200 is subjected to bending vibration (or flexing vibration), the vibration of the edge of the vibration generator 200 is not suppressed (or reduced) by the connecting member 150 and / or the manual vibration member 100, which can increase the vibration amplitude (displacement amplitude or drive amplitude) of the vibration generator 200. Therefore, the vibration amplitude (displacement amplitude or drive amplitude) of the manual vibration member 100 due to the vibration of the vibration generator 200 increases, which can further improve the acoustic characteristics and sound pressure characteristics in the low-frequency range generated by the vibration of the manual vibration member 100.

[0177] The connecting member 150 according to other embodiments of this specification may be connected or bonded to the entire front surface of one or more vibration generating devices 200 and the rear surface 100a of the manual vibration member 100 by a full-surface bonding method.

[0178] The connecting member 150 according to the embodiments of this specification may be made of a material that includes an adhesive layer with excellent adhesion or bonding strength to the rear surface 100a of the display panel or manual vibration member 100 and to one or more vibration generating devices 200. For example, the connecting member 150 may include, but is not limited to, a foam pad, double-sided tape, or adhesive. For example, the adhesive layer of the connecting member 150 may include, but is not limited to, epoxy, acrylic, silicone, or urethane. For example, the adhesive layer of the connecting member 150 may include an acrylic series substance (or material) that has relatively superior adhesive strength and high hardness compared to the urethane series. This allows vibrations from one or more vibration generating devices 200 to be effectively transmitted to the manual vibration member 100.

[0179] The apparatus according to the embodiments of this specification may further include a support member 300 and a connecting member 350.

[0180] The support member 300 may be positioned on the rear surface 100a of the manual vibrator 100. The support member 300 may be positioned on the rear surface 100a of the manual vibrator 100 so as to cover the vibration generator 200. The support member 300 may be positioned on the rear surface 100a of the manual vibrator 100 so as to cover both the rear surface 100a of the manual vibrator 100 and the vibration generator 200. For example, the support member 300 may be the same size as the manual vibrator 100. For example, the support member 300 may cover the rear surface of the manual vibrator 100 with the vibration generator 200 and a gap space GS in between. For example, the support member 300 may cover the entire rear surface of the manual vibrator 100 with the vibration generator 200 and a gap space GS in between. The gap space GS may be provided by a coupling member 350 positioned between the manual vibrator 100 and the support member 300 facing each other. The gap space GS may be represented as an air gap, storage space, vibration space, or acoustic resonator, and the embodiments herein are not limited thereto.

[0181] The support member 300 may be made of any one of the following materials: glass, metal, and plastic. The support member 300 may also be made of a laminated structure in which at least one of the following materials is laminated: glass, metal, and plastic.

[0182] Each of the manual vibrating member 100 and the support member 300 may have a square or rectangular shape, but the embodiments of this specification are not limited thereto. For example, each of the manual vibrating member 100 and the support member 300 may have a polygonal, non-polygonal, circular, or elliptical shape. For example, when the apparatus according to the embodiments of this specification is applied to an acoustic device or a sound bar, each of the manual vibrating member 100 and the support member 300 may have a rectangular shape in which the length of the longer side is at least twice as long as the length of the shorter side, but the embodiments of this specification are not limited thereto.

[0183] The connecting member 350 is configured to connect between the rear edge of the manual vibrating member 100 and the front edge of the support member 300, thereby creating a gap space GS between the manual vibrating member 100 and the support member 300 facing each other.

[0184] The bonding member 350 according to the embodiments of this specification may include an elastic material that is adhesive, compressible, and resilient. For example, the bonding member 350 may include, but is not limited to, double-sided tape, single-sided tape, or double-sided adhesive foam pad. For example, the bonding member 350 may include an elastic pad such as a rubber pad or silicone pad that is adhesive, compressible, and resilient. For example, the bonding member 350 may be formed from an elastomer.

[0185] For example, the support member 300 may further include a side wall portion that supports the rear edge of the manual vibrator 100. The side wall portion of the support member 300 may project or bend from the front edge of the support member 300 toward the rear edge of the manual vibrator 100, thereby creating a gap space GS between the manual vibrator 100 and the support member 300. In this case, the connecting member 350 may be configured to connect between the side wall portion of the support member 300 and the rear edge of the manual vibrator 100. This allows the support member 300 to cover one or more vibration generators 200 and support the rear surface of the manual vibrator 100. For example, the support member 300 can cover one or more vibration generators 200 and support the rear edge of the manual vibrator 100.

[0186] For example, the manual vibrator 100 may further include a side wall portion connected to the front edge of the support member 300. The side wall portion of the manual vibrator 100 may project or bend from the rear edge of the manual vibrator 100 toward the front edge of the support member 300, thereby creating a gap space GS between the manual vibrator 100 and the support member 300. The rigidity of the manual vibrator 100 may be increased by the side wall portion. In this case, the connecting member 350 may be configured to connect between the side wall portion of the manual vibrator 100 and the rear edge of the support member 300. This allows the support member 300 to cover one or more vibration generators 200 and support the rear surface 100a of the manual vibrator 100. For example, the support member 300 may cover one or more vibration generators 200 and support the rear edge of the manual vibrator 100.

[0187] The apparatus according to the embodiments of this specification may further include one or more enclosures 250.

[0188] The enclosure 250 may be connected or coupled to the rear edge of the manual vibrator 100 so as to individually cover one or more vibration generators 200. For example, the enclosure 250 may be connected or coupled to the rear surface 100a of the manual vibrator 100 via a coupling member 251. The enclosure 250 can form a sealed space that covers or surrounds one or more vibration generators 200 on the rear surface 100a of the manual vibrator 100. For example, the enclosure 250 may be a sealed member, a sealed cap, a sealed box, or a sound box, but is not limited to these embodiments of this specification. The sealed space may be an air gap, a vibration space, an acoustic space, or a resonator, but is not limited to these embodiments of this specification.

[0189] The enclosure 250 may include one or more materials from among metallic materials and non-metallic materials (or composite non-metallic materials). For example, the enclosure 250 may include one or more materials from among metal, plastic, and wood, but the embodiments herein are not limited thereto.

[0190] The enclosure 250 according to the embodiments of this specification can maintain a constant impedance component due to the air acting on the manual vibrating member 100 when the manual vibrating member 100 or vibration generator 200 is vibrating. For example, the air surrounding the manual vibrating member 100 resists the vibration of the manual vibrating member 100 and acts as an impedance component having different resistance and reactance components depending on the frequency. As a result, the enclosure 250 maintains a constant impedance component (air impedance or elastic impedance) acting on the manual vibrating member 100 by the air by forming a sealed space surrounding one or more vibration generators 200 on the rear surface 100a of the manual vibrating member 100, thereby improving the acoustic characteristics and / or sound pressure characteristics in the low-frequency range and improving the sound quality of the high-frequency range.

[0191] The vibrating devices according to the embodiments of this specification may be applied to or included in vibrating devices arranged in a device. The apparatuses according to the embodiments of this specification may be applied to mobile devices, video phones, smartwatches, watch phones, wearable apparatuses, foldable apparatuses, rollable apparatuses, bendable apparatuses, flexible apparatuses, curved apparatuses, sliding apparatuses, variable apparatuses, electronic organizers, ebooks, portable multimedia players (PMPs), personal digital assistants (PDAs), MP3 players, mobile medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation systems, vehicle navigation systems, vehicle display devices, vehicle equipment, theater equipment, theater display devices, TVs, wallpaper equipment, signage equipment, game consoles, laptops, monitors, cameras, camcorders, and consumer electronics. Furthermore, some of the vibration generators according to the embodiments of this specification can be applied to organic light-emitting lighting devices or inorganic light-emitting lighting devices. When a vibration generator is applied to or included in a lighting device, the lighting device can function as both a light source and a speaker. Furthermore, when some of the vibration generators according to the embodiments of this specification are applied to or included in a mobile device or the like, they may be one or more of a speaker, receiver, and haptic device, but the embodiments of this specification are not limited to these.

[0192] The technical scope of this specification, as described above, is not limited to the embodiments and accompanying drawings described above. It will be obvious to those with ordinary skill in the art to which this specification pertains that various substitutions, modifications, and alterations are possible without departing from the technical idea of ​​this specification. Therefore, the technical scope of this specification is defined by the claims described below, and all changes or altered forms derived from the meaning of the claims and their equivalent concepts should be interpreted as being included within the technical scope of this specification. [Explanation of Symbols]

[0193] 11 Vibration device 10A First Vibration Section 10B 2nd vibration section 11 Vibration layer 13 First electrode layer 15 Second electrode layer 16 1st auxiliary electrode layer 17 Second auxiliary electrode layer 18 Third auxiliary electrode layer 19 4th auxiliary electrode layer 20 Connectivity layer 23 Auxiliary connection layer 30 First cover member 40 Adhesive layer 50 Second cover member 61 1st connection part 62 2nd connection part 63 Third connection part 64 4th connection part 90 signal cable 100 Manual vibrating member 200 Vibration Generator 300 Support Member CNT1 to CNT4: 1st to 4th contact holes

Claims

1. A vibration generating unit including multiple vibrating parts, A connecting layer disposed between the plurality of vibrating parts, and Signal cables electrically connected to the plurality of vibrating parts Includes, Each of the aforementioned plurality of vibrating parts includes at least one connecting part, The signal cable does not overlap with the at least one of the connecting portions. Vibration device.

2. The vibration generating unit includes a first vibration unit and a second vibration unit. Each of the first vibrating section and the second vibrating section is: a first electrode layer; Second electrode layer, and A vibrating layer containing a piezoelectric material is located between the first electrode layer and the second electrode layer. Includes, The at least one of the aforementioned connecting portions is configured in the vibration layer. The vibration device according to claim 1.

3. The vibration device according to claim 2, wherein at least one of the connecting portions comprises the same material as the first electrode layer and the second electrode layer.

4. The at least one of the aforementioned connecting parts is A first connecting portion disposed in the vibration layer of the first vibrating portion, A second connecting portion is disposed in the vibration layer of the second vibrating portion and is electrically connected to the first connecting portion. A third connecting portion is disposed in the vibration layer of the first vibrating portion and is separated from the first connecting portion, and A fourth connecting portion is disposed in the vibration layer of the second vibrating portion and is electrically connected to the third connecting portion. The vibration device according to claim 2, including the following:

5. The first connecting portion and the second connecting portion overlap each other. The third and fourth connecting portions overlap each other. The vibration device according to claim 4.

6. The first vibrating portion includes a first contact hole located on one side of the vibrating layer, and a third contact hole located on the other side, different from the first side. The second vibrating portion includes a second contact hole located on one side of the vibrating layer, and a fourth contact hole located on the other side, different from the first side. Each of the first connecting portion, the second connecting portion, the third connecting portion, and the fourth connecting portion is inserted into each of the first contact hole, the second contact hole, the third contact hole, and the first to fourth contact holes, The signal cable does not overlap the first contact hole, the second contact hole, the third contact hole, and the fourth contact hole. The vibration device according to claim 4.

7. The signal cable includes a first signal line and a second signal line electrically connected to the plurality of vibrating parts. The first signal line does not overlap with the third contact hole and the fourth contact hole. The second signal line does not overlap with the first contact hole and the second contact hole. The vibration device according to claim 6.

8. The first vibrating portion includes a first contact hole and a third contact hole that are spaced apart from each other on one side of the vibrating layer. The second vibrating portion includes a second contact hole and a fourth contact hole that are spaced apart from each other on one side of the vibrating layer. Each of the first connecting portion, the second connecting portion, the third connecting portion, and the fourth connecting portion is inserted into each of the first contact hole, the second contact hole, the third contact hole, and the fourth contact hole, The signal cable does not overlap the first contact hole, the second contact hole, the third contact hole, and the fourth contact hole. The vibration device according to claim 4.

9. The signal cable includes a first signal line and a second signal line electrically connected to the plurality of vibrating parts. The first signal line does not overlap with the third contact hole and the fourth contact hole. The second signal line does not overlap with the first contact hole and the second contact hole. The vibration device according to claim 8.

10. The first vibrating part is, A first auxiliary electrode layer is disposed on the first surface of the vibrating layer so as to be electrically isolated from the first electrode layer, and A third auxiliary electrode layer is disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. It further includes, The first auxiliary electrode layer is electrically connected to the second electrode layer of the first vibrating part via the first connecting portion. The third auxiliary electrode layer is electrically connected to the first electrode layer of the first vibrating portion via the third connecting portion. The vibration device according to claim 4.

11. The second vibrating section is, A second auxiliary electrode layer is disposed on the first surface of the vibrating layer so as to be electrically isolated from the first electrode layer, and A fourth auxiliary electrode layer is disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. It further includes, The second auxiliary electrode layer is electrically connected to the second electrode layer of the second vibrating portion via the second connecting portion. The fourth auxiliary electrode layer is electrically connected to the first electrode layer of the second vibrating portion via the fourth connecting portion. The vibration device according to claim 4.

12. The vibration device according to claim 2, wherein the connecting layer is electrically connected to the second electrode layer disposed between the vibration layer of the first vibration section and the vibration layer of the second vibration section.

13. The vibration device according to claim 4, further comprising an auxiliary connecting layer disposed between the first vibrating section and the second vibrating section so as to be electrically isolated from the connecting layer.

14. The first vibrating portion further includes a third auxiliary electrode layer disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. The second vibrating portion further includes a fourth auxiliary electrode layer disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. The auxiliary connecting layer is electrically connected to the third auxiliary electrode layer and the fourth auxiliary electrode layer. The vibration device according to claim 13.

15. The first vibrating portion further includes a third auxiliary electrode layer disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. The second vibrating portion further includes a fourth auxiliary electrode layer disposed on the second surface of the vibrating layer so as to be electrically isolated from the second electrode layer. The first electrode layer of the second vibrating section is electrically connected to the first electrode layer of the first vibrating section via the fourth connecting section, the fourth auxiliary electrode layer, the auxiliary connecting layer, the third auxiliary electrode layer, and the third connecting section. The second electrode layer of the second vibrating portion is electrically connected to the second electrode layer of the second vibrating portion via the connecting layer. The vibration device according to claim 13.

16. A first cover member connected to the first surface of the vibration generating part, and A second cover member connected to the second surface of the vibration generating part opposite to the first surface of the vibration generating part. The vibration device according to claim 1, further comprising:

17. The signal cable includes a first signal line and a second signal line electrically connected to the plurality of vibrating parts. The first signal line and the second signal line are housed between the second surface of the vibration generating unit and the second cover member. The vibration device according to claim 16.

18. The signal cable includes a first signal line and a second signal line electrically connected to the plurality of vibrating parts. The first signal line is electrically connected to the first electrode layer of the second vibrating part and the first electrode layer of the first vibrating part. The second signal line is electrically connected to the second electrode layer of the first vibrating section, the connecting layer, and the second electrode layer of the second vibrating section. The vibration device according to claim 2.

19. Manual vibrating member, and A vibration generating device connected to the manual vibrating member, which vibrates the manual vibrating member. Includes, The vibration generating device includes the vibration device described in any one of claims 1 to 18. Device.

20. The apparatus according to claim 19, further comprising an enclosure disposed on the rear surface of the manual vibrator so as to cover the vibration generating device.

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