Flexible cable, vibration device and display device

Abstract

To simplify the structure and manufacturing process of the vibration device. [Solution] A flexible cable includes a base member having a terminal portion, a conductive layer having a plurality of conductive lines arranged on the base member, and a protective layer arranged on the base member to cover the conductive layer and expose one side of each of the plurality of conductive lines from the terminal portion, wherein the length of each of the plurality of conductive lines is longer than the length of the base member. Alternatively, a vibration device includes a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

Description

[Technical field]

[0001] The present specification relates to a flexible cable, a vibration device, and a display device. [Background technology]

[0002] Recently, there has been an increasing demand for slimmer and thinner electronic devices. In response to the demand for slimmer and thinner speakers for use in electronic devices, the piezoelectric type, which can achieve a thinner thickness instead of the voice coil type, is attracting attention.

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

[0004] A typical vibration device (or film actuator) includes a film having wiring and pad electrodes for applying driving power to a piezoelectric element. Such a typical vibration device requires processes such as patterning the wiring and pad electrodes on the film and soldering to electrically connect the pad electrodes and signal cables. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present specification conducted several experiments to realize a vibration device that can simplify the structure and manufacturing process of the vibration device. For example, the inventors of the present specification recognized that in order to simplify the structure and manufacturing process of the vibration device, it is necessary to remove the film having the wiring and the pad electrodes, and it is necessary to omit the soldering process. Therefore, the inventors of the present specification invented a flexible cable with a new structure that can simplify the structure and manufacturing process of the vibration device, a vibration device including the same, and a display device including the same.

[0006] An object of the embodiments of the present specification is to provide a flexible cable that can simplify the structure and manufacturing process of a vibration device, a vibration device including the flexible cable, and a display device including the flexible cable.

[0007] The problems to be solved by the embodiments of the present specification are not limited to those described above, and other problems not mentioned will be clearly understood by a person having ordinary skill in the art to which the technical ideas of the present specification belong from the following description. [Means for solving the problem]

[0008] A flexible cable according to an embodiment of the present specification includes a base member having a terminal portion, a conductive layer having a plurality of conductive lines disposed on the base member, and a protective layer disposed on the base member and covering the conductive layer to expose a portion of each of the plurality of conductive lines from the terminal portion, and the length of each of the plurality of conductive lines may be longer than the length of the base member.

[0009] A vibration device according to an embodiment of the present specification may include a vibration structure including a first electrode layer arranged on a first surface of a vibration layer and a second electrode layer arranged on a second surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

[0010] A vibration device according to an embodiment of the present specification may include a vibration structure including a first electrode layer arranged on a first surface of the vibration layer and a second electrode layer arranged on a second surface of the vibration layer, a first protective member on the first surface of the vibration structure, a second protective member arranged on the second surface of the vibration structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibration structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibration structure and the second protective member.

[0011] A display device according to an embodiment of the present specification includes a display panel that displays images, and a vibration device arranged on the rear surface of the display panel to vibrate the display panel, the vibration device including a vibration structure including a first electrode layer arranged on a first surface of the vibration layer and a second electrode layer arranged on a second surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

[0012] A display device according to an embodiment of the present specification includes a display panel for displaying images, and a vibration device arranged on the rear surface of the display panel to vibrate the display panel, the vibration device including a vibration structure including a first electrode layer arranged on a first surface of the vibration layer and a second electrode layer arranged on a second surface of the vibration layer, a first protective member on the first surface of the vibration structure, a second protective member arranged on the second surface of the vibration structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibration structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibration structure and the second protective member.

[0013] Specific matters relating to the various aspects of this specification other than the means for solving the above-mentioned problems are included in the following description and drawings. Effect of the Invention

[0014] According to the present specification, it is possible to provide a flexible cable that can increase the degree of freedom in designing the terminal position of a driver, a vibration device including the same, and a display device including the same.

[0015] According to the present specification, it is possible to provide a vibration device integrated with a cable and a display device including the same.

[0016] According to this specification, it is possible to provide a display device capable of outputting sound generated by vibration of a display panel caused by vibration of a vibration device to the front of the display panel.

[0017] According to the present specification, it is possible to provide a display device capable of outputting stereo sound in front of a display panel by vibrating different regions of the display panel due to vibrations of a plurality of vibration devices.

[0018] The effects of the present specification are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the following description. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 illustrates a flexible cable according to an embodiment of the present specification. [Diagram 2] 2 is a cross-sectional view taken along line II' shown in FIG. 1. [Diagram 3] 2 is a diagram showing an electrical connection structure between the flexible cable and the driver shown in FIG. 1; [Figure 4] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Diagram 5] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 6] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 7] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 8] 8 is a diagram showing an electrical connection structure between the flexible cable and the driver shown in FIG. 7. [Figure 9] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 10] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 11] 11 is a cross-sectional view taken along line II-II' shown in FIG. [Figure 12] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 13] FIG. 13 shows a flexible cable according to another embodiment of the present specification. [Figure 14] 14 is a cross-sectional view showing a connection structure between the flexible cable and the driver shown in FIG. 13. [Figure 15] FIG. 1 illustrates a vibration device according to an embodiment of the present disclosure. [Figure 16] 16 is a cross-sectional view taken along line III-III' shown in FIG. 15. [Figure 17] 16 is a cross-sectional view taken along line IV-IV' shown in FIG. 15. [Figure 18A] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18B] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18C] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18D] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18E] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18F] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 18G] FIG. 18 is a diagram showing a piezoelectric layer of the vibration structure shown in FIGS. 15 to 17. [Figure 19] 1 illustrates a vibration device according to another embodiment of the present specification. [Figure 20] 1 illustrates a vibration device according to another embodiment of the present specification. [Figure 21] 21 is a cross-sectional view taken along line VV' shown in FIG. 20. [Figure 22] 1 illustrates a vibration device according to another embodiment of the present specification. [Figure 23] 1 illustrates a vibration device according to another embodiment of the present specification. [Figure 24] 24 is a cross-sectional view taken along line VI-VI' shown in FIG. 23. [Diagram 25] FIG. 1 illustrates a display device according to an embodiment of the present disclosure. [Figure 26] 26 is a cross-sectional view taken along line VII-VII' shown in FIG. 25. [Figure 27]26 is another cross-sectional view taken along the line VII-VII' shown in FIG. 25. [Figure 28] 1 is a diagram illustrating a display device according to another embodiment of the present specification. [Figure 29] 1 is a diagram illustrating a display device according to another embodiment of the present specification. [Figure 30A] 1 illustrates a display device including a vibration device according to an embodiment of the present specification. [Figure 30B] 1 illustrates a display device including a vibration device according to an embodiment of the present specification. [Figure 30C] 1 illustrates a display device including a vibration device according to an embodiment of the present specification. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The advantages and features of the present specification and the methods for achieving them will become apparent from various examples described below in detail with reference to the accompanying drawings. However, the present specification is not limited to the examples disclosed below, and may be realized in various different forms, and the examples etc. of the present specification are provided merely to complete the disclosure of the specification and to fully inform those skilled in the art to which the technical matters of the present specification belong of the scope of the invention, and the technical matters of the present specification are defined only by the scope of the claims.

[0021] The shapes, sizes, ratios, angles, numbers, etc. disclosed in the drawings to explain an example of the present specification are merely illustrative and the present specification is not limited to the matters shown in the drawings. The same reference numerals refer to the same components throughout the specification. In addition, in describing the present specification, if a detailed description of related known technology is determined to unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0022] When the terms "comprise", "have", "consist of", etc. are used as mentioned in this specification, other parts can be added unless "only" is used. When an element is expressed in the singular, it includes the plural unless otherwise expressly stated.

[0023] In interpreting elements, they are interpreted as including a margin of error even if there is no explicit mention otherwise.

[0024] When describing a positional relationship, for example when the positional relationship of two parts is described using "above", "at the top", "below", "beside", etc., one or more other parts may be located between the two parts, unless "immediately" or "directly" is used.

[0025] When describing a temporal relationship, if the temporal sequence is described using "after," "following," "next to," "before," etc., it can also include cases where the events are not consecutive, as long as "immediately" or "directly" are not used.

[0026] Although the terms "first", "second" and the like are used to describe various components, these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component referred to below may be the second component within the technical concept of the present invention.

[0027] The term "at least one" should be understood to include all possible combinations of one or more associated items. For example, "at least one of the first, second, and third items" may mean all possible combinations of the first, second, and third items that can be present in two or more of the first, second, and third items, not just the first, second, or third items, respectively.

[0028] The technical features of the various examples of this specification may be partially or fully combined or combined with each other, and may be technically interlocked and driven in various ways, and each example may be implemented independently of the others, or may be implemented together in a linked relationship.

[0029] Hereinafter, embodiments of a flexible cable, a vibration device including the same, and a display device including the same according to the present specification will be described in detail with reference to the accompanying drawings. When assigning reference numerals to components in each drawing, the same components may have the same numerals as much as possible even if they are displayed in different drawings. In addition, the scale of the components shown in the accompanying drawings is different from the actual scale for convenience of explanation, and is not limited to the scale shown in the drawings.

[0030] FIG. 1 is a diagram showing a flexible cable according to an embodiment of the present specification, and FIG. 2 is a cross-sectional view taken along line II' shown in FIG.

[0031] 1 and 2, the flexible cable according to the present specification may be, for example, but is not limited to, a flexible flat cable.

[0032] In the flexible cable according to the embodiment of the present specification, the base member 11 can include a conductive layer 13 and a protective layer 15 .

[0033] The base member 11 may include a transparent and / or opaque plastic material. For example, the base member 11 may be realized by any one or more of synthetic resins including, but not limited to, fluororesin, polyimide-based resin, polyurethane-based resin, polyester-based resin, polyethylene-based resin, and polypropylene-based resin. The base member 11 may be a base film or a base insulating film.

[0034] The base member 11 according to the embodiment of the present specification may include a terminal portion 11a. The terminal portion 11a may include a plurality of terminals arranged at one side end portion of the base member 11. The plurality of terminals may be arranged at regular intervals, for example, the terminal portion 11a may be an input terminal portion and / or an output terminal portion.

[0035] The conductive layer 13 may be disposed on the base member 11. For example, the conductive layer 13 may be a conductive material including, but not limited to, copper (Cu), aluminum (Al), silver (Ag), or an alloy material of copper (Cu) and silver (Ag). The conductive layer 13 may be disposed directly on the base member 11.

[0036] The conductive layer 13 according to the embodiment of the present disclosure may include a plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. Each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be patterned from a conductive material layer provided on the base member 11.

[0037] The conductive lines 13-1, 13-2, 13-3, and 13-4 according to the embodiment of the present specification may be spaced apart from each other along a first direction (X direction) and disposed on one surface (or upper surface) of the base member 11 parallel to a second direction (Y direction) intersecting the first direction (X direction). Each of the conductive lines 13-1, 13-2, 13-3, and 13-4 may have a first width (W1) along the first direction (X direction) and may extend long along the second direction (Y direction), and may be arranged to have a first interval (D1) along the first direction (X direction). The first interval (D1) may be set within a minimum range that can prevent electrical shorts between the conductive lines 13-1, 13-2, 13-3, and 13-4. For example, the first interval (D1) may be the same as or different from the first width (W1). For example, the first distance (D1) may be set to 1 mm or more, but is not necessarily limited thereto. Therefore, the plurality of conductive lines can be electrically insulated from each other.

[0038] Based on the second direction (Y direction), the length (L1) of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be longer than the length (L2) of the base member 11. For example, each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may have a length (L1) longer than the length (L2) of the base member 11 by protruding or extending to the outside through a side surface 11s of the base member 11. For example, the protruding length (or extension length) (L3) of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be more than twice the length (L4) of the terminal portion 11a arranged on the base member 11, but is not limited thereto.

[0039] Each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 according to the embodiment of the present specification may include a first line 13a disposed on the base member 11 and a second line 13b extending or protruding outward from a side surface of the base member 11. For example, the first line 13a may be represented as a first line portion 13a, and the second line 13b may be represented as a second line portion 13b.

[0040] The second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 are not fixed (or supported) by the base member 11, and therefore can have higher flexibility than the first lines 13a fixed to the base member 11. For example, the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 can be supported by the base member 11 in a manufacturing process of the flexible cable. A part of the base member 11 supporting the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 is removed by a film removing process, and thus the second lines 13b can have a shape protruding or extending from the base member 11 without being fixed to the base member 11. As a result, the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 can have flexibility. The second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be, but is not limited to, an extension line, a protruding line, or a finger line, and the first line 13a may be, but is not limited to, a fixed line.

[0041] The second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be an output terminal unit. For example, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be electrically connected to an external driver (or driver element) to supply the driver with a driving power (or a driving signal) supplied via the terminal unit 11a on the base member 11. For example, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be electrically connected to a shape-changing member whose shape is changed by the driving power.

[0042] The protective layer 15 may be disposed on the base member 11 to cover the conductive layer 13. For example, the protective layer 15 may be disposed directly on the conductive layer 13 or the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 disposed on the base member 11. The protective layer 15 may be disposed directly on the base member 11 between the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and may surround each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. The protective layer 15 may expose one side portion 13e of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 from the terminal portion 11a. The protective layer 15 can be disposed on the remaining part of the base member 11 excluding the terminal portion 11a on the base member 11, thereby surrounding the remaining part excluding one side portion 13e of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 disposed on the base member 11. For example, the protective layer 15 can surround the first line 13a of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 disposed on the base member 11.

[0043] The protective layer 15 according to the embodiment of the present specification may include a plurality of openings 15a overlapping with the plurality of terminals arranged in the terminal portion 11a on the base member 11. As a result, one side portion 13e of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 is exposed to the outside through each of the plurality of openings 15a formed in the protective layer 15, thereby realizing a terminal of a flexible cable.

[0044] The protective layer 15 according to the embodiment of the present specification may include a transparent or opaque plastic material. For example, the protective layer 15 may be realized by any one or more of synthetic resins including, but not limited to, fluororesin, polyimide-based resin, polyurethane-based resin, polyester-based resin, polyethylene-based resin, and polypropylene-based resin. The protective layer 15 may be a coverlay, a coverlay film, a cover film, or a cover insulating film, and is not limited to these terms.

[0045] As an example, the protective layer 15 may be realized on the base member 11 by any suitable process known in the art. For example, the protective layer 15 according to the embodiments herein may be realized on the base member 11 by a coating process.

[0046] In another embodiment, the protective layer 15 according to the embodiment of the present specification may be bonded or attached to the base member 11 by a lamination process using an adhesive. Thus, the first line 13a of each of the plurality of conductive lines 13-1, 13-2, 13-3, 13-4 may be surrounded or enveloped by the protective layer 15 and the base member 11 by being disposed between the protective layer 15 and the base member 11. For example, the adhesive may include, but is not limited to, a polymer resin.

[0047] The flexible cable according to the embodiment of the present specification may further include a pad portion 13p disposed on the terminal portion 11a of the base member 11.

[0048] The pad portion 13p may include a plurality of electrode pads arranged on the plurality of terminals of the terminal portion 11a. Each of the plurality of electrode pads may include at least one of gold (Au) and silver (Ag). For example, each of the plurality of electrode pads may be a plating layer.

[0049] The flexible cable according to the embodiments of the present specification can receive or input driving power through the terminal portion 11a corresponding to one side portion 13e of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and output driving power through the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4.

[0050] In a flexible cable according to an embodiment of the present disclosure, the multiple conductive lines 13-1, 13-2, 13-3, 13-4 may be grouped into multiple electrode groups.

[0051] The conductive lines 13-1, 13-2, 13-3, and 13-4 according to the embodiment of the present specification may be grouped into first and second electrode groups. For example, the first electrode group may include some of the conductive lines 13-1, 13-2, 13-3, and 13-4, and the second electrode group may include the remaining conductive lines 13-1, 13-2, 13-3, and 13-4, excluding the conductive lines 13-1, 13-2, 13-3, and 13-4 belonging to the first electrode group, among the conductive lines 13-1, 13-2, 13-3, and 13-4. For example, when the flexible cable includes first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4, the first electrode group can include the first and second conductive lines 13-1, 13-2, and the second electrode group can include the third and fourth conductive lines 13-3, 13-4.

[0052] Among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, the conductive lines 13-1, 13-2, 13-3, and 13-4 belonging to the first electrode group may receive a first driving power supply through one side portion 13e and output the first driving power supply through the second line 13b. Among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, the conductive lines 13-1, 13-2, 13-3, and 13-4 belonging to the second electrode group may receive a second driving power supply (or a second driving signal) different from the first driving power supply through one side portion 13e and output the second driving power supply through the second line 13b. For example, the first driving power supply may be either a positive polarity (+) power supply or a negative polarity (-) power supply, and the second driving power supply may be the remaining one of the positive polarity (+) power supply and the negative polarity (-) power supply.

[0053] In the flexible cable according to the embodiments of the present specification, the base member 11, the first line 13a of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and the protective layer 15 can realize a body portion (BP), and the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 can realize a finger portion (FP) protruding from the body portion (BP).

[0054] The body portion (BP) may include a base member 11, a first line 13a of each of a plurality of electrically conductive lines 13-1, 13-2, 13-3, 13-4, and a protective layer 15.

[0055] The finger portion (FP) may include a second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 protruding from the body portion (BP). The length (L3) of the finger portion (FP) may be longer than the length (L4) of the terminal portion 11a disposed on the base member 11 and / or the length (L2) of the base member 11. The second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be a finger line. Thus, the flexible cable according to the embodiment of the present specification may include a body portion (BP) having the terminal portion 11a, and a plurality of second lines 13b protruding from the body portion (BP).

[0056] The finger portion (FP) according to the embodiment of the present specification may include a plurality of finger line groups including at least one second line 13b among the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. According to the embodiment of the present specification, the finger portion (FP) may include first and second finger line groups. The first finger line group may include some of the second lines 13b among the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and the second finger line group may include the remaining second lines 13b among the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 excluding the second lines 13b belonging to the first finger line group.

[0057] FIG. 3 is a diagram showing an electrical connection structure between the flexible cable and the driver shown in FIG.

[0058] 1 to 3, a flexible cable according to an embodiment of the present specification may be electrically connected to a driver (or actuator) 1 via the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. Some of the second lines 13b (or first electrode groups) and the remaining second lines 13b (or second electrode groups) of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be electrically connected to the driver 1 to have an alternating arrangement shape. For example, the driver 1 may be a vibration module, a vibration unit, a vibration device, or a flexible vibration device.

[0059] The driver 1 according to the embodiments of the present specification may include an upper electrode side or layer (or a first electrode layer) 1a disposed on an upper surface and a lower electrode side or layer (or a second electrode layer) 1b disposed on a lower surface.

[0060] In the flexible cable according to the embodiment of the present specification, some of the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be bent toward the upper surface of the actuator 1 to be electrically connected to the upper electrode layer 1a of the actuator 1. The remaining second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be bent toward the lower surface of the actuator 1 to be electrically connected to the lower electrode layer 1b of the actuator 1. For example, the second line 13b (or a plurality of first finger lines) of each of the first and second conductive lines 13-1 and 13-2 among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be electrically connected to the upper electrode layer 1a of the actuator 1, and the second line 13b (or a plurality of second finger lines) of each of the third and fourth conductive lines 13-3 and 13-4 among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be electrically connected to the lower electrode layer 1b of the actuator 1. Thus, the flexible cable may be electrically connected to the actuator 1 such that the plurality of first finger lines and the plurality of second finger lines have a shape in which they are alternately arranged. Thus, a subgroup of the finger lines bends downward to be attached to the lower side of the driver, while another subgroup of the finger lines bends upward to be attached to the upper side of the driver.

[0061] Therefore, the flexible cable according to the embodiment of the present specification includes the second lines 13b (or finger lines) of the plurality of conductive lines 13-1, 13-2, 13-3, 13-4 protruding from the base member 11 (or body part (BP)), and can be electrically connected to the actuator 1 via the flexible second lines 13b. As a result, the flexible cable according to the embodiment of the present specification can be used as a common cable that can be electrically connected to various actuators having different terminal structures, and can increase the design freedom for the position of the actuator terminals (or electrode pads).

[0062] Fig. 4 shows a flexible cable according to another embodiment of the present specification, which is a modified version of the conductive line structure shown in Figs. 1 and 2. Therefore, in the following, redundant description of the remaining configuration except for the conductive line will be omitted or simplified. The cross section of line I-I' shown in Fig. 4 is shown in Fig. 2.

[0063] Combining Fig. 4 with Fig. 2, in a flexible cable according to another embodiment of the present specification, each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may include a plurality of straps 13s. For example, each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may include, but is not limited to, two or more straps 13s. For example, the number of straps 13s may be set within a range that can minimize or prevent defects due to breakage of the conductive lines. For example, each of the plurality of straps 13s may be a fine electrode line.

[0064] Each of the conductive lines 13-1, 13-2, 13-3, and 13-4 according to the embodiment of the present specification may be separated into a plurality of straps 13s. Each of the straps 13s may be disposed on one surface (or upper surface) of the base member 11 so as to be spaced apart from each other along the first direction (X direction) in parallel with the second direction (Y direction) and may extend to the outside of the side surface of the base member 11. For example, each of the straps 13s may be disposed across the body portion (BP) and finger portion (FP) of the flexible cable.

[0065] In another embodiment, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may be separated into a plurality of straps 13s. In each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, the plurality of straps 13s may be finger lines commonly connected to the first line 13a by extending (or protruding) from the first line 13a so as to be spaced apart from each other along the first direction (X direction) in parallel with the second direction (Y direction).

[0066] The intervals between the multiple straps 13s can be set within a minimum range that can prevent electrical shorts between the straps 13s. For example, the intervals between the multiple straps 13s can be set to 1 mm or more, but are not necessarily limited to this.

[0067] Therefore, the flexible cable according to another embodiment of the present specification includes a plurality of conductive lines 13-1, 13-2, 13-3, 13-4 having a plurality of straps 13s, thereby minimizing or preventing defects due to breakage of the conductive lines, etc., that may occur during the manufacturing process of the flexible cable.

[0068] Fig. 5 is a diagram showing a flexible cable according to another embodiment of the present specification, which is configured by adding a support to the flexible cable shown in Fig. 1. Therefore, in the following, redundant description of the remaining configuration except for the support will be omitted or simplified.

[0069] 5, a flexible cable according to another embodiment of the present specification may further include a support 17 disposed on the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. In describing the embodiment of the present specification, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 will be referred to as "plurality of finger lines 13b."

[0070] The support 17 supports the plurality of finger lines 13b, thereby maintaining the separation distance (D1) between the finger lines 13b and preventing electrical shorts between the second lines 13b.

[0071] The support 17 according to the embodiment of the present disclosure may support a portion of each of the plurality of finger lines 13b. For example, the support 17 may cover or surround a middle portion of each of the plurality of finger lines 13b.

[0072] The supports 17 according to other embodiments may be arranged at regular intervals (D2, D3) along the second direction (Y direction) to support the middle of each of the second lines 13b of the plurality of finger lines 13b. For example, when the flexible cable according to other embodiments of the present specification includes a plurality of supports 17, the second interval (D2) between the base member 11 and the first support 17 may be the same as or different from the third interval (D3) between the plurality of supports 17. For example, the second interval (D2) and the third interval (D3) may be set to be the same as or different from each other within a range in which no electrical connection failure occurs in the entire length of the finger lines 13b and between the finger lines 13b and the driver.

[0073] The support 17 according to the embodiments of the present disclosure may include a first support 17a and a second support 17b.

[0074] The first support 17a may support the finger lines 13b. The first support 17a may be a lower support that supports the lower part of the finger lines 13b. The first support 17a according to the embodiment of the present specification may be made of the same material as the base member 11, but is not limited thereto. For example, the first support 17a may be a part of the base member 11 that is not removed during the manufacturing process of the flexible cable and supports the finger lines 13b, but is not limited thereto.

[0075] The second support 17b may cover the finger lines 13b. The second support 17b may be an upper support surrounding the upper and side portions of the finger lines 13b. The second support 17b according to the embodiment of the present specification may be made of the same material as the protective layer 15, but is not limited thereto. For example, the second support 17b may be disposed on the finger lines 13b together with the protective layer 15, or may be a part of the protective layer 15 that covers the finger lines 13b without being removed during the manufacturing process of the flexible cable, but is not limited thereto.

[0076] Therefore, the flexible cable according to another embodiment of the present specification further includes a support 17 arranged on the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, thereby maintaining the separation distance (D1) between the second lines 13b and preventing electrical shorts between the second lines 13b.

[0077] Fig. 6 is a diagram showing a flexible cable according to another embodiment of the present specification, in which the support body shown in Fig. 5 is applied to the flexible cable shown in Fig. 4. Therefore, in the following, redundant descriptions of the remaining configurations except for the support body and the configurations related thereto will be omitted or simplified.

[0078] 6, in a flexible cable according to another embodiment of the present specification, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may include a plurality of straps 13s spaced apart from one another. The plurality of straps 13s are substantially the same as the plurality of straps 13s described in FIG. 4, and therefore are denoted by the same reference numerals and will not be described again.

[0079] The support 17 can surround the straps 13s of the conductive lines 13-1, 13-2, 13-3, and 13-4 in common. The support 17 can surround a portion of the straps 13s in common. The support 17 can include first and second supports 17a and 17b that surround a portion of the straps 13s in common. The first and second supports 17a and 17b are substantially the same as the first and second supports 17a and 17b described in FIG. 5, except that they surround the straps 13s in common, and therefore the same reference numerals are used to denote the first and second supports 17a and 17b, and a duplicate description thereof will be omitted.

[0080] Therefore, the flexible cable according to another embodiment of the present specification may have the effects of the flexible cable described in Fig. 4 and the effects of the flexible cable described in Fig. 5. For example, the flexible cable according to another embodiment of the present specification may include a plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 having a plurality of straps 13s, thereby minimizing or preventing defects caused by breakage of the conductive lines during the manufacturing process of the flexible cable. For example, the flexible cable according to another embodiment of the present specification may further include a support 17 disposed on the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, thereby maintaining the separation distance (D1) between the second lines 13b and preventing electrical shorts between the second lines 13b.

[0081] Fig. 7 is a diagram showing a flexible cable according to another embodiment of the present specification, which is a modified version of the conductive line structure shown in Fig. 1. Therefore, in the following, redundant descriptions of the remaining configurations except for the conductive lines will be omitted or simplified. The cross section of line I-I' shown in Fig. 7 is shown in Fig. 2.

[0082] Combining FIG. 7 with FIG. 2, a flexible cable according to another embodiment of the present disclosure may include first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4.

[0083] The first to fourth conductive lines 13-1, 13-2, 13-3, 13-4 may be grouped into first and second electrode groups 13G1, 13G2.

[0084] The first electrode group 13G1 may include a first conductive line 13-1 and a second conductive line 13-2. The second electrode group 13G2 may include a third conductive line 13-3 and a fourth conductive line 13-4.

[0085] The first electrode group 13G1 and the second electrode group 13G2 may be spaced apart from each other along the first direction (X direction) to have a fourth distance (D4). For example, the second line 13b of the second conductive line 13-2 of the first electrode group 13G1 and the second line 13b of the third conductive line 13-3 of the second electrode group 13G2 may be spaced apart from each other along the first direction (X direction) to have a fourth distance (D4). The fourth distance (D4) may be greater than the distance between adjacent conductive lines included in one electrode group, such as the first or second electrode group 13G1, 13G2.

[0086] According to an embodiment of the present specification, the first conductive line 13-1 of the first electrode group 13G1 and the third conductive line 13-3 of the second electrode group 13G2 may each receive a first driving power source through one side 13e and output the first driving power source through the second line 13b. The second conductive line 13-2 of the first electrode group 13G1 and the fourth conductive line 13-4 of the second electrode group 13G2 may each receive a second driving power source through one side 13e and output the second driving power source through the second line 13b.

[0087] According to another embodiment, the first conductive line 13-1 of the first electrode group 13G1 and the fourth conductive line 13-4 of the second electrode group 13G2 may each receive a first driving power source through one side 13e and output the first driving power source through the second line 13b. The second conductive line 13-2 of the first electrode group 13G1 and the third conductive line 13-3 of the second electrode group 13G2 may each receive a second driving power source through one side 13e and output the second driving power source through the second line 13b.

[0088] Therefore, the flexible cable according to another embodiment of the present specification can simultaneously supply driving power to each of the first and second driving bodies separated from the driving body via the first and second electrode groups 13G1, 13G2.

[0089] FIG. 8 is a diagram showing an electrical connection structure between the flexible cable and the driver shown in FIG.

[0090] 7 and 8, a flexible cable according to another embodiment of the present specification can be electrically connected to first and second actuators separated from actuator 1 via second lines 13b of conductive lines 13-1, 13-2, 13-3, and 13-4 belonging to first and second electrode groups 13G1 and 13G2, respectively.

[0091] The second line 13b (or first finger line) of the first conductive line 13-1 and the second line 13b (or second finger line) of the second conductive line 13-2 belonging to the first electrode group 13G1 may be electrically connected to the first actuator of the actuator 1 so as to have an alternating arrangement shape. The second line 13b (or third finger line) of the third conductive line 13-3 and the second line 13b (or fourth finger line) of the fourth conductive line 13-4 belonging to the second electrode group 13G2 may be electrically connected to the second actuator of the actuator 1 so as to have an alternating arrangement shape.

[0092] The actuator 1 according to the embodiment of the present specification may include first and second actuators 1-1 and 1-2 that are electrically separated from each other. The first actuator 1-1 may include a first upper electrode layer 1a1 disposed on the upper surface and a first lower electrode layer 1b1 disposed on the lower surface. The second actuator 1-2 may include a second upper electrode layer 1a2 disposed on the upper surface and a second lower electrode layer 1b2 disposed on the lower surface.

[0093] According to an embodiment of the present specification, in the first electrode group 13G1, the second line 13b of the first conductive line 13-1 may be bent toward the upper surface of the first actuator 1-1 to be electrically connected to the first upper electrode layer 1a1 of the first actuator 1-1. In the first electrode group 13G1, the second line 13b of the second conductive line 13-2 may be bent toward the lower surface of the first actuator 1-1 to be electrically connected to the first lower electrode layer 1b1 of the first actuator 1-1.

[0094] In the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent toward the upper surface of the second actuator 1-2 to be electrically connected to the second upper electrode layer 1a2 of the second actuator 1-2. In the second electrode group 13G2, the second line 13b of the fourth conductive line 13-4 may be bent toward the lower surface of the second actuator 1-2 to be electrically connected to the second lower electrode layer 1b2 of the second actuator 1-2.

[0095] According to another embodiment, in the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent toward the lower surface of the second actuator 1-2 to be electrically connected to the second lower electrode layer 1b2 of the second actuator 1-2. In the second electrode group 13G2, the second line 13b of the fourth conductive line 13-4 may be bent toward the upper surface of the second actuator 1-2 to be electrically connected to the second upper electrode layer 1a2 of the second actuator 1-2.

[0096] Therefore, the flexible cable according to the other embodiment of the present specification may have the same effect as the flexible cable shown in FIG. 1. The flexible cable according to the embodiment of the present specification may include the second lines 13b (or finger lines) of the conductive lines 13-1, 13-2, 13-3, and 13-4 protruding from the base member 11 (or body part (BP)), and may be electrically connected to the actuators through the flexible second lines 13b. As a result, the flexible cable according to the embodiment of the present specification may be used as a common cable that may be electrically connected to various actuators having different terminal structures, and may increase the design freedom of the actuator terminal (or electrode pad) position. The flexible cable according to the other embodiment of the present specification may simultaneously supply driving power to the first and second actuators 1-1 and 1-2 arranged separately in the actuator 1 through the second lines 13b (or finger lines) of the conductive lines 13-1, 13-2, 13-3, and 13-4 belonging to the first and second electrode groups 13G1 and 13G2, respectively.

[0097] Fig. 9 is a diagram showing a flexible cable according to another embodiment of the present specification, in which the support body shown in Fig. 5 is applied to the flexible cable shown in Fig. 7. Therefore, in the following, redundant descriptions of the remaining configurations, except for the support body and the configurations related thereto, will be omitted or simplified.

[0098] 9, in a flexible cable according to another embodiment of the present specification, the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 may include a plurality of straps 13s spaced apart from one another. The plurality of straps 13s are substantially the same as the plurality of straps 13s described in FIG. 4, and therefore are denoted by the same reference numerals and will not be described again.

[0099] One or more supports 17 may surround the straps 13s of the conductive lines 13-1, 13-2, 13-3, and 13-4 in common. The support 17 may surround a portion of the straps 13s in common. The support 17 may include first and second supports 17a and 17b that surround a portion of the straps 13s in common. The first and second supports 17a and 17b are substantially the same as the first and second supports 17a and 17b described in FIG. 5, except that they surround the straps 13s in common, and therefore the same reference numerals are used to denote the first and second supports 17a and 17b, and a duplicate description thereof will be omitted.

[0100] Therefore, the flexible cable according to another embodiment of the present specification may have the effects of the flexible cable described in Fig. 7 and the effects of the flexible cable described in Fig. 5. The flexible cable according to another embodiment of the present specification may simultaneously supply driving power to each of the first and second actuators separated from the actuators through the first and second electrode groups 13G1 and 13G2. For example, the flexible cable according to another embodiment of the present specification may further include a support 17 disposed on the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, thereby maintaining the separation distance (D1) between the second lines 13b and preventing electrical shorts between the second lines 13b.

[0101] Fig. 10 is a diagram showing a flexible cable according to another embodiment of the present specification, and Fig. 11 is a cross-sectional view taken along line II-II' in Fig. 10, which is a modified version of the conductive line structure shown in Fig. 1. Therefore, in the following, redundant descriptions of the remaining configurations except for the conductive lines will be omitted or simplified.

[0102] 10 and 11, a flexible cable according to another embodiment of the present disclosure may include first and second conductive lines 13-1, 13-2.

[0103] Each of the first and second conductive lines 13-1, 13-2 may include a first line 13a arranged on the base member 11, a second line 13b extending or protruding from the first line 13a to the outside of the side of the base member 11 along the second direction (Y direction), and at least one third line 13c protruding from the second line 13b in the first direction (X direction).

[0104] In each of the first and second conductive lines 13-1, 13-2, the first line 13a and the second line 13b are substantially the same as the first line 13a and the second line 13b described in Figures 1 and 2, respectively, and therefore are given the same symbols and redundant explanations thereof will be omitted.

[0105] In each of the first and second conductive lines 13-1 and 13-2, at least one third line 13c may extend from at least one of one side and the other side of the second line 13b along the first direction (X direction) in parallel with the second direction (Y direction). For example, in each of the first and second conductive lines 13-1 and 13-2, the second line 13b and the third line 13c may have a planar structure in the shape of a T, a cross, a dagger, or a double dagger, but are not limited thereto.

[0106] The third line 13c of the first conductive line 13-1 is separated from the third line 13c of the second conductive line 13-2 along the second direction (Y direction), so that the third line 13c of the first conductive line 13-1 and the third line 13c of the second conductive line 13-2 can be electrically insulated or separated from each other. The third line 13c may be a wing line, and is not limited to the term.

[0107] Each of the third lines 13c of the first conductive line 13-1 and the second conductive line 13-2 may have a length longer than the first width (W1) of the corresponding second line 13b. The third lines 13c of the first conductive line 13-1 and the third lines 13c of the second conductive line 13-2 may have different lengths, but are not limited to this.

[0108] According to an embodiment of the present specification, the third line 13c of each of the first and second conductive lines 13-1 and 13-2 may include a 3-1 line 13c1 extending from one side of the corresponding second line 13b along the first direction (X direction) and a 3-2 line 13c2 extending from the other side of the corresponding second line 13b along the first direction (X direction). The 3-1 line 13c1 of the first conductive line 13-1 and the 3-2 line 13c2 of the second conductive line 13-2 may have the same length, but are not limited thereto. The 3-2 line 13c2 of the first conductive line 13-1 and the 3-1 line 13c1 of the second conductive line 13-2 may have the same length, but are not limited thereto.

[0109] In each of the first and second conductive lines 13-1 and 13-2 according to the embodiment of the present specification, the 3-1 line 13c1 and the 3-2 line 13c2 may have different lengths. For example, in each of the first and second conductive lines 13-1 and 13-2, the 3-2 line 13c2 may have a length relatively longer than the corresponding 3-1 line 13c1 or the base member 11, as shown in FIG. 12.

[0110] Therefore, the flexible cable according to the other embodiments of the present specification can have the effect of the flexible cable described in FIG. 1 to FIG. 3. For example, the flexible cable according to the embodiment of the present specification can be electrically connected to the actuator through the flexible second line 13b by including the second line 13b (or finger line) of the plurality of conductive lines 13-1, 13-2, 13-3, 13-4 protruding from the base member 11 (or body part (BP)). As a result, the flexible cable according to the embodiment of the present specification can be used as a common cable that can be electrically connected to various actuators having different terminal structures, and the design freedom of the terminal (or electrode pad) position of the actuator can be increased. The flexible cable according to the other embodiments of the present specification can supply a more uniform driving power to the actuator by increasing the contact area between the actuator and the third line 13c of each of the first and second conductive lines 13-1 and 13-2. Furthermore, when the flexible cable shown in FIG. 12 is applied to the actuator shown in FIG. 8, the flexible cable shown in FIG. 12 can simultaneously supply driving power to the first and second actuators 1-1 and 1-2 of the actuator 1 via the third lines 13c of the first and second conductive lines 13-1 and 13-2, respectively, thereby reducing the number of terminals.

[0111] Fig. 13 is a diagram showing a flexible cable according to another embodiment of the present specification, and Fig. 14 is a cross-sectional view showing a connection structure between the flexible cable shown in Fig. 13 and a driver, which is configured by adding one or more line support parts to the flexible cable shown in Fig. 1 to Fig. 3. Therefore, in the following, redundant description of the remaining configuration except for the one or more line support parts will be omitted or simplified.

[0112] 13 and 14, a flexible cable according to another embodiment of the present specification may further include one or more line support portions 19 supporting the second line 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4.

[0113] One or more line support parts 19 may support a first surface (front surface, or one surface) and / or a second surface (back surface, or other surface) of a corresponding second line 13b among the second lines 13b of each of the multiple conductive lines 13-1, 13-2, 13-3, and 13-4.

[0114] The one or more line supports 19 according to embodiments of the present specification may include a first line support 19a supporting some of the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and / or a second line support 19b supporting the remaining second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4.

[0115] The first line support portion 19a may commonly or individually support or cover the front surface of some of the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. For example, the first line support portion 19a may be made of the same material as the protective layer 15, but is not limited thereto. For example, the first line support portion 19a may be, but is not limited to, a part of the protective layer 15 that is not removed during the manufacturing process of the flexible cable and covers the front surface and side surface of the corresponding second line 13b.

[0116] The second line support portion 19b may commonly or individually support the back surfaces of the remaining second lines 13b among the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4. For example, the second line support portion 19b may be made of the same material as the base member 11, but is not limited thereto. For example, the second line support portion 19b may be a part of the base member 11 that is not removed during the manufacturing process of the flexible cable and covers the back surfaces of the corresponding second lines 13b, but is not limited thereto.

[0117] According to an embodiment of the present specification, the first line support portion 19a may support the second lines 13b of the first and second conductive lines 13-1, 13-2 that are grouped into the first electrode group among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4, and the second line support portion 19b may support the second lines 13b of the third and fourth conductive lines 13-3, 13-4 that are grouped into the second electrode group among the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4.

[0118] According to an embodiment of the present specification, some of the second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 are exposed toward the rear (or downward) direction of the flexible cable, and are electrically connected to the upper electrode layer 1a disposed on the upper surface of the actuator 1 as shown in Fig. 14, and are not exposed to the front surface of the flexible cable by the second line support part 19b. According to an embodiment of the present specification, the remaining second lines 13b of each of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 are exposed toward the front (or upward) direction of the flexible cable, and are electrically connected to the lower electrode layer 1b disposed on the lower surface of the actuator 1 as shown in Fig. 14, and are not exposed to the rear surface of the flexible cable by the first line support part 19a.

[0119] Therefore, in the flexible cable according to another embodiment of the present specification, the second lines 13b of the plurality of conductive lines 13-1, 13-2, 13-3, and 13-4 are supported by the line support parts 19, thereby preventing electrical shorts between the second lines 13b and improving electrical adhesion characteristics and adhesion reliability with the driver. One or more line support parts 19 may be electrically insulated.

[0120] FIG. 15 is a diagram showing a vibration device according to an embodiment of the present specification, FIG. 16 is a cross-sectional view taken along line III-III' in FIG. 15, and FIG. 17 is a cross-sectional view taken along line IV-IV' in FIG. 15.

[0121] 15 to 17, a vibration device according to an embodiment of the present specification may include a vibration structure 210 and a flexible cable 230. For example, the vibration device may be a vibration device with which the flexible cable 230 is integrated.

[0122] The vibration structure 210 can vibrate by alternately repeating contraction and expansion due to the piezoelectric effect (or piezoelectric characteristics). The vibration structure 210 according to the embodiment of the present specification can vibrate in the thickness direction (Z direction) by alternately repeating contraction and expansion due to the inverse piezoelectric effect.

[0123] A vibrating structure 210 according to embodiments of the present disclosure may include a vibrating module having a piezoelectric layer 211 , a first electrode layer 213 , and a second electrode layer 215 .

[0124] The piezoelectric layer 211 may include a piezoelectric material that includes the piezoelectric effect, a composite piezoelectric material, or an electroactive material. The piezoelectric layer 211 may be described by other terms such as a vibration layer, a piezoelectric material layer, a piezoelectric composite layer, an electroactive layer, a vibration section, a piezoelectric material section, a piezoelectric composite section, an electroactive section, a piezoelectric structure, a piezoelectric composite, or a piezoelectric ceramic composite.

[0125] The piezoelectric layer 211 according to the embodiments of the present specification may be made of a ceramic-based material capable of realizing a relatively high vibration. For example, the piezoelectric layer 211 may have a 1-3 composite having a piezoelectric characteristic of a 1-3 vibration mode or a 2-2 composite having a piezoelectric characteristic of a 2-2 vibration mode. For example, the piezoelectric layer 211 according to the embodiments of the present specification may be applied to a display panel having a large size, and the piezoelectric deformation coefficient (piezoelectric constant: d 33 ) can be 1000 pC / N or more, but is not necessarily limited to this. pC / N is a unit of the piezoelectric effect that indicates the amount of electricity generated on the surface of a piezoelectric material when a force of 1 Newton is applied.

[0126] The first electrode layer 213 may be disposed on a first surface (or an upper surface) of the piezoelectric layer 211 and may be electrically connected to the first surface of the piezoelectric layer 211. For example, the first electrode layer 213 may have the form of an electrode (or a common electrode) disposed over the entire first surface of the piezoelectric layer 211. The first electrode layer 213 according to the embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent or semi-transparent conductive material may include, but is not limited to, ITO (indium tin oxide) or IZO (indium zinc oxide). The opaque conductive material may include, but is not limited to, aluminum (Al), copper (Cu), gold (Au), silver (Ag), molybdenum (Mo), magnesium (Mg), or the like, or may be made of an alloy thereof.

[0127] The second electrode layer 215 may be disposed on a second surface (or back surface) opposite to the first surface of the piezoelectric layer 211, and may be electrically connected to the second surface of the piezoelectric layer 211. For example, the second electrode layer 215 may have the form of an electrode (or common electrode) disposed over the entire second surface of the piezoelectric layer 211. The second electrode layer 215 according to the embodiment of the present specification may be made of a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the second electrode layer 215 may be made of the same material as the first electrode layer 213, but is not limited thereto. In another embodiment, the second electrode layer 215 may be made of a material different from that of the first electrode layer 213.

[0128] The piezoelectric layer 211 may be polarized by a constant voltage applied to the first electrode layer 213 and the second electrode layer 215 in a constant temperature atmosphere or a temperature atmosphere that changes from high temperature to room temperature, but is not limited thereto.

[0129] The flexible cable 230 may be integrated with the vibrating structure 210 by being electrically connected to the first and second electrode layers 213, 215 of the vibrating structure 210 at one side of the vibrating structure 210. For example, the flexible cable 230 may be integrated with the vibrating structure 210 by being directly electrically connected to the first and second electrode layers 213, 215 of the vibrating structure 210 at one side of the vibrating structure 210.

[0130] The flexible cable 230 according to the embodiment of the present specification may include a plurality of conductive lines 13-1, 13-2. For example, some of the plurality of conductive lines 13-1, 13-2 may be electrically connected to the first electrode layer 213 of the vibrating structure 210, and the remaining portion of the plurality of conductive lines 13-1, 13-2 may be electrically connected to the second electrode layer 215 of the vibrating structure 210. For example, some of the plurality of conductive lines 13-1, 13-2 may be electrically connected directly to the first electrode layer 213 of the vibrating structure 210, and the remaining portion of the plurality of conductive lines 13-1, 13-2 may be electrically connected directly to the second electrode layer 215 of the vibrating structure 210. For example, each of the plurality of conductive lines 13-1, 13-2 may be bent toward the corresponding electrode layer 213, 215, but is not limited thereto.

[0131] The flexible cable 230 according to the embodiment of the present specification may include a body part (BP) having a terminal part 11a, and a plurality of finger lines 13-1, 13-2 protruding from the body part (BP). For example, some of the plurality of finger lines 13-1, 13-2 may be electrically connected to the first electrode layer 213 of the vibrating structure 210, and the remaining portion of the plurality of finger lines 13-1, 13-2 may be electrically connected to the second electrode layer 215 of the vibrating structure 210. For example, some of the plurality of finger lines 13-1, 13-2 may be electrically connected directly to the first electrode layer 213 of the vibrating structure 210, and the remaining portion of the plurality of finger lines 13-1, 13-2 may be electrically connected directly to the second electrode layer 215 of the vibrating structure 210. For example, each of the plurality of finger lines 13-1, 13-2 may be bent toward the corresponding electrode layer 213, 215, but is not limited thereto. For example, the protruding length of each of the multiple finger lines 13-1, 13-2 can be longer than the length of the terminal portion 11a.

[0132] A flexible cable 230 according to an embodiment of the present specification may include a base member 11, a conductive layer 13 having first and second conductive lines 13-1, 13-2, and a protective layer 15. Such a flexible cable 230 has substantially the same configuration as the flexible cable 230 described in Figures 1 to 3, except that the conductive layer 13 includes first and second conductive lines 13-1, 13-2, and therefore a repeated description thereof will be omitted.

[0133] Each of the first and second conductive lines 13-1, 13-2 may include a first line 13a disposed on the base member 11, and a second line 13b (or finger line) extending from the first line 13a along the second direction (Y direction) through the side surface 11s of the base member 11 onto the vibrating structure 210. Each of the first and second conductive lines 13-1, 13-2 has substantially the same configuration as the conductive lines 13-1, 13-2, 13-3, 13-4 described in FIGS. 1 to 3, and therefore a duplicate description thereof will be omitted.

[0134] In the flexible cable 230, the second lines 13b of the first and second conductive lines 13-1, 13-2 protruding from the base member 11 can be used as wiring electrodes and pad electrodes of the vibrating structure 210.

[0135] The second line 13b of the first conductive line 13-1 may be electrically connected to the first electrode layer 213 of the vibrating structure 210. For example, the second line 13b of the first conductive line 13-1 may be bent from one side of the vibrating structure 210 toward the first electrode layer 213 of the vibrating structure 210 and electrically connected to an end portion of one side of the first electrode layer 213.

[0136] The second line 13b of the second conductive line 13-2 may be electrically connected to the second electrode layer 215 of the vibrating structure 210. For example, the second line 13b of the second conductive line 13-2 may be bent from one side of the vibrating structure 210 toward the second electrode layer 215 of the vibrating structure 210 and electrically connected to an end portion of one side of the second electrode layer 215.

[0137] Each of the first and second conductive lines 13-1, 13-2 may include a plurality of straps 13s as described in FIG. 4, may include a plurality of straps 13s and a support 17 as described in FIG. 6, or may further include a third line 13c as described in FIG. 10.

[0138] Therefore, the flexible cable 230 can supply driving power to the vibrating structure 210 via the second line 13b of each of the first and second conductive lines 13-1, 13-2, thereby reducing the voltage drop due to the sheet resistance characteristics of each of the first electrode layer 213 and the second electrode layer 215 arranged on the vibrating structure 210, complementing the electrical characteristics of each of the first electrode layer 213 and the second electrode layer 215, and increasing the freedom of selection of the conductive material used for the first electrode layer 213 and the second electrode layer 215.

[0139] The vibrating device or vibrating structure 210 according to the embodiments of the present disclosure may further include a first protective member 250 and a second protective member 270 .

[0140] The first protective member 250 may be disposed on the first surface of the vibrating structure 210. For example, the first protective member 250 may be disposed on the first surface of the vibrating structure 210 with the second line 13b of the first conductive line 13-1 sandwiched therebetween. The first protective member 250 may protect the first surface of the vibrating structure 210 or the first electrode layer 213 by covering the first surface of the vibrating structure 210 and the second line 13b of the first conductive line 13-1 of the flexible cable 230, and may maintain an electrical connection between the first electrode layer 213 of the vibrating structure 210 and the second line 13b of the first conductive line 13-1 of the flexible cable 230.

[0141] The first protective member 250 according to the embodiment of the present specification may be connected to the first surface of the vibrating structure 210 on which the second line 13b of the first conductive line 13-1 of the flexible cable 230 is disposed, via the first adhesive layer 240. For example, the first protective member 250 may be attached to the first surface of the vibrating structure 210 including the second line 13b of the first conductive line 13-1 by a film lamination process using the first adhesive layer 240 as an intermediary. Thus, the second line 13b (or the first finger line) of the first conductive line 13-1 of the flexible cable 230 may be disposed between the first surface of the vibrating structure 210 and the first protective member 250, and may be integrated with the vibrating structure 210. Alternatively, the first protective member 250 may be attached to the first surface of the vibrating structure 210 including the second line 13b of the first conductive line 13-1 through another process.

[0142] The second protective member 270 may be disposed on the second surface of the vibrating structure 210. For example, the second protective member 270 may be disposed on the second surface of the vibrating structure 210 with the second line 13b of the second conductive line 13-2 in between. The second protective member 270 may protect the second surface of the vibrating structure 210 or the second electrode layer 215 by covering the second surface of the vibrating structure 210 and the second line 13b of the second conductive line 13-2 of the flexible cable 230, and may maintain an electrical connection between the second electrode layer 215 of the vibrating structure 210 and the second line 13b of the second conductive line 13-2 of the flexible cable 230.

[0143] The second protective member 270 according to the embodiment of the present specification may be connected to the second surface of the vibrating structure 210 on which the second line 13b of the second conductive line 13-2 of the flexible cable 230 is disposed, via the second adhesive layer 260. For example, the second protective member 270 may be attached to the second surface of the vibrating structure 210 including the second line 13b of the second conductive line 13-2 by a film lamination process using the second adhesive layer 260 as an intermediary. Thus, the second line 13b (or the second finger line) of the second conductive line 13-2 of the flexible cable 230 may be disposed between the second surface of the vibrating structure 210 and the second protective member 270, and may be integrated with the vibrating structure 210. Alternatively, the second protective member 270 may be attached to the second surface of the vibrating structure 210 including the second line 13b of the second conductive line 13-2 through another process.

[0144] As an example, each of the first and second protective members 250 and 270 may be a protective film or insulating film for protecting the vibrating structure 210 since it does not include wiring or pads electrically connected to the vibrating structure 210.

[0145] Each of the first and second protective members 250, 270 according to embodiments herein may include a plastic film.

[0146] For example, each of the first and second protective members 250, 270 may be a polyimide film or a polyethylene terephthalate film, but is not limited thereto.

[0147] As another embodiment, each of the first and second protective members 250, 270 may include a metal film or a metal plate made of a metal material. Each of the first and second protective members 250, 270 may be connected to the vibrating structure 210 via an adhesive layer 240, 260. Each of the first and second protective members 250, 270 made of a metal material may reinforce the mass of the vibrating structure 210 and reduce the resonance frequency of the vibrating structure 210 due to the increase in mass, thereby increasing the low-frequency sound pressure characteristic of the vibrating structure 210.

[0148] For example, each of the first and second protective members 250, 270 may be made of one or more materials selected from the group consisting of stainless steel, aluminum (Al), magnesium (Mg), magnesium (Mg) alloy, magnesium lithium (Li) alloy, and aluminum (Al) alloy, but is not necessarily limited thereto.

[0149] In another embodiment, one of the first and second protective members 250, 270 may be made of a metal material and the other may be made of a plastic film. In this case, the mass of the vibrating structure 210 may be increased by one of the first and second protective members 250, 270 made of a metal material, and thus the low-frequency sound pressure characteristic of the vibrating structure 210 may be increased.

[0150] The first adhesive layer 240 may be disposed between the first electrode layer 213 of the vibrating structure 210 and the first protective member 250. The first adhesive layer 240 may cover the second line 13b (or the first finger line) of the first conductive line 13-1 of the flexible cable 230. The second adhesive layer 260 may be disposed between the second electrode layer 215 of the vibrating structure 210 and the second protective member 270. The second adhesive layer 260 may cover the second line 13b (or the second finger line) of the second conductive line 13-2 of the flexible cable 230.

[0151] According to an embodiment of the present specification, each of the first and second adhesive layers 240, 260 may include an electrically insulating material that is compressible and resilient while having adhesive properties. For example, each of the first and second adhesive layers 240, 260 may include, but is not limited to, an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin.

[0152] According to an embodiment of the present specification, when either the first or second protective member 250, 270 is made of a metal material, the first adhesive layer 240 and the second adhesive layer 260 may each function as an electrical insulating layer that electrically insulates the protective members 250, 270 made of a metal material from the electrode layers 213, 215 of the vibration structure 210. For example, the first adhesive layer 240 may be a first electrical insulating layer, and the second adhesive layer 260 may be a second electrical insulating layer.

[0153] Therefore, the vibration device according to the embodiment of the present specification does not require a patterning process for forming wiring and pads on each of the first protection member 250 and the second protection member 270 and a soldering process between the vibration structure 210 and the flexible cable 230 due to the integrated structure between the vibration structure 210 and the flexible cable 230, so that the structure and manufacturing process of the vibration device can be simplified. In addition, the vibration device according to the embodiment of the present specification does not require a conductive sheet (or a conductive film) between each of the first protection member 250 and the second protection member 270 and the vibration structure 210 because wiring and pads are not arranged on each of the first protection member 250 and the second protection member 270, so that a vibration device having a thin thickness can be realized by omitting the conductive sheet. In addition, the vibration device according to the embodiment of the present specification can directly supply driving power to the vibration structure 210 via the flexible cable 230. The vibration device according to the embodiments of the present specification can supplement the electrical characteristics of the first electrode layer 213 and the second electrode layer 215 arranged on the vibration structure 210 by supplying driving power to the vibration structure 210 via the flexible cable 230.

[0154] 18A to 18G are diagrams showing the piezoelectric layer of the vibration structure 210 shown in FIGS.

[0155] 18A, the piezoelectric layer 211 of the vibration structure 210 according to the embodiment of the present specification may include a plurality of first portions 211a and a plurality of second portions 211b. For example, the plurality of first portions 211a and the plurality of second portions 211b may be arranged alternately and repeatedly along the second direction (Y direction). Each of the plurality of first portions 211a may be arranged between the plurality of second portions 211b and may have a second width (W2) along the second direction (Y direction) and a length along the first direction (X direction). Each of the plurality of second portions 211b may have a third width (W3) equal to the second width (W2) and a length along the first direction (X direction).

[0156] For example, the first portion 211a and the second portion 211b may have a line shape or a stripe shape having the same size. Therefore, the piezoelectric layer 211 of the vibration structure 210 shown in Fig. 18A may have a resonance frequency of 20 kHz or less by having a 2-2 complex, but is not limited thereto, and the resonance frequency of the piezoelectric layer 211 may be changed by at least one of the shape, length, and thickness.

[0157] 18B, the piezoelectric layer 211 of the vibration structure 210 according to the embodiment of the present specification may include a plurality of first portions 211a and a plurality of second portions 211b arranged alternately and repeatedly along a first direction (X direction). Each of the plurality of first portions 211a is arranged between the plurality of second portions 211b and may have a fourth width (W4) along the first direction (X direction) and a length along the second direction (Y direction). Each of the plurality of second portions 211b may have a fifth width (W5) equal to the fourth width (W4) and a length along the second direction (Y direction).

[0158] For example, the first portion 211a and the second portion 211b may have a line shape or a stripe shape having the same size. Therefore, the piezoelectric layer 211 of the vibration structure 210 shown in Fig. 18B may have a resonance frequency of 20 kHz or less by having a 2-2 complex, but is not limited thereto, and the resonance frequency of the piezoelectric layer 211 may be changed by at least one of the shape, length, and thickness.

[0159] In the piezoelectric layer 211 of the vibrating structure 210 shown in Figures 18A and 18B, the multiple first portions 211a and the multiple second portions 211b can be arranged (or arrayed) side by side on the same plane (or the same layer). Each of the multiple second portions 211b can be connected or bonded to the adjacent first portions 211a by being configured to fill the gap between two adjacent first portions 211a. This allows the piezoelectric layer 211 to expand to a desired size or length by the side bonding (or connection) of the first portions 211a and the second portions 211b.

[0160] In the piezoelectric layer 211 of the vibration structure 210 shown in Figures 18A and 18B, the width (W3, W5) of each of the multiple second portions 211b may gradually decrease from the middle portion of the piezoelectric layer 211 or the vibration device toward both end portions (or both tips).

[0161] According to an embodiment of the present specification, the second portion 211b having the largest width (W3, W5) among the plurality of second portions 211b may be located in a portion where the largest stress is concentrated when the piezoelectric layer 211 or the vibration device vibrates in the vertical direction (Z direction) (or thickness direction). The second portion 211b having the smallest width (W3, W5) among the plurality of second portions 211b may be located in a portion where the smallest stress is generated relatively when the piezoelectric layer 211 or the vibration device vibrates in the vertical direction (Z direction). For example, the second portion 211b having the largest width (W3, W5) among the plurality of second portions 211b may be disposed in the middle portion of the piezoelectric layer 211, and the second portion 211b having the smallest width (W3, W5) among the plurality of second portions 211b may be disposed at both end portions of the piezoelectric layer 211. As a result, when the piezoelectric layer 211 or the vibration device vibrates in the vertical direction (Z direction), it is possible to minimize the interference of sound waves or the overlap of resonance frequencies occurring in the part where the greatest stress is concentrated, thereby improving the dipping phenomenon of sound pressure occurring in the low frequency range and improving the flatness of the acoustic characteristics in the low frequency range. For example, the flatness of the acoustic characteristics can be the magnitude of deviation between the maximum sound pressure and the minimum sound pressure.

[0162] In the piezoelectric layer 211 of the vibration structure 210 shown in Figures 18A and 18B, each of the multiple first portions 211a may have a different size (or width). For example, the size (or width) of each of the multiple first portions 211a may gradually decrease or increase from the middle portion of the piezoelectric layer 211 or the vibration device toward both end portions (or both ends). In this case, the piezoelectric layer 211 of the vibration structure 210 can improve the sound pressure characteristics of the sound due to various natural vibration frequencies caused by the vibration of each of the multiple first portions 211a having different sizes, and can expand the reproduction band of the sound.

[0163] Referring to FIG. 18C, the piezoelectric layer 211 of the vibration structure 210 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along a first direction (X direction) and a second direction (Y direction), and a second portion 211b arranged between the plurality of first portions 211a. Each of the plurality of first portions 211a may be arranged to be spaced apart from each other along each of the first direction (X direction) and the second direction (Y direction). For example, each of the plurality of first portions 211a may be arranged in a lattice shape while having a hexahedral shape having the same size. The second portion 211b may be arranged between the plurality of first portions 211a along each of the first direction (X direction) and the second direction (Y direction). The second portion 211b may be connected or bonded to the adjacent first portion 211a by filling the gap between two adjacent first portions 211a or surrounding each of the plurality of first portions 211a. According to the embodiment of the present specification, the width of the second portion 211b disposed between two adjacent first portions 211a along the first direction (X direction) may be the same as or different from the width of the first portion 211a, and the width of the second portion 211b disposed between two adjacent first portions 211a along the second direction (Y direction) may be the same as or different from the width of the first portion 211a. The piezoelectric layer 211 of the vibration structure 210 shown in Fig. 18C may have a resonant frequency of 30 MHz or less by having a 1-3 complex, but is not limited thereto, and the resonant frequency of the piezoelectric layer 211 may be changed by at least one of the shape, length, and thickness.

[0164] Referring to FIG. 18D, a piezoelectric layer 211 of a vibrating structure 210 according to another embodiment of the present disclosure may include a first piezoelectric region 211-1 and a second piezoelectric region 211-2.

[0165] The first piezoelectric region 211-1 and the second piezoelectric region 211-2 may include different composites or have different vibration modes, for example, the first piezoelectric region 211-1 may include a 2-2 composite and the second piezoelectric region 211-2 may include a 1-3 composite.

[0166] The first piezoelectric region 211-1 according to the embodiment of the present specification may include a plurality of first portions 211a and a plurality of second portions 211b arranged alternately and repeatedly along a first direction (X direction). The plurality of first portions 211a and the plurality of second portions 211b arranged in the first piezoelectric region 211-1 are substantially the same as the piezoelectric layer 211 described in FIG. 18B, and therefore a duplicate description thereof will be omitted.

[0167] The second piezoelectric region 211-2 according to the embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along a first direction (X direction) and a second direction (Y direction), and a plurality of second portions 211b disposed between the plurality of first portions 211a or surrounding each of the plurality of first portions 211a. The plurality of first portions 211a and the plurality of second portions 211b disposed in the second piezoelectric region 211-2 are substantially the same as the piezoelectric layer 211 described in FIG. 18C, and therefore a duplicate description thereof will be omitted.

[0168] 18D may have a resonant frequency of 20 kHz or less due to the 2-2 complex of the first piezoelectric region 211-1 and a resonant frequency of 30 MHz or less due to the 1-3 complex of the second piezoelectric region 211-2, but is not limited thereto, and the resonant frequency of the piezoelectric layer 211 may be changed by at least one or more of the shape, length, and thickness, etc. For example, the first piezoelectric region 211-1 may be a speaker or a haptic device, and the second piezoelectric region 211-2 may be a sensor device.

[0169] Referring to FIG. 18E, the piezoelectric layer 211 of the vibration structure 210 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along a first direction (X direction) and a second direction (Y direction), and a second portion 211b surrounding each of the first portions 211a. Each of the first portions 211a may have a planar structure in the form of a circle. For example, each of the first portions 211a may have a circular shape, but is not limited thereto, and may have a dot shape including an elliptical shape, a polygonal shape, or a doughnut shape. The second portion 211b may be configured to surround each of the first portions 211a, and may be connected or bonded to a side of each of the first portions 211a. Each of the first portions 211a and the second portions 211b may be arranged (or aligned) next to each other on the same plane (or the same layer). 18E can be realized as a circular vibration source (or vibrator) having a 1-3 complex, thereby improving vibration characteristics or acoustic output characteristics and having a resonance frequency of 30 MHz or less. Without being limited thereto, the resonance frequency of the piezoelectric layer 211 can be changed by at least one of the shape, length, and thickness of the piezoelectric layer.

[0170] 18F, a piezoelectric layer 211 of a vibration structure 210 according to another embodiment of the present specification may include a plurality of first portions 211a spaced apart from each other along a first direction (X direction) and a second direction (Y direction), and a second portion 211b surrounding each of the plurality of first portions 211a. Each of the plurality of first portions 211a may have a triangular planar structure. For example, each of the plurality of first portions 211a may have a triangular plate shape.

[0171] According to an embodiment of the present specification, among the plurality of first portions 211a, four adjacent first portions 211a may be disposed adjacent to each other to form a quadrangle (or square). The vertices of the four adjacent first portions 211a forming a quadrangle may be disposed adjacent to the center (or exact center) of the quadrangle. The second portion 211b may be configured to surround each of the plurality of first portions 211a, and may be connected or bonded to the side of each of the plurality of first portions 211a. Each of the plurality of first portions 211a and the second portion 211b may be disposed (or arranged) next to each other on the same plane (or the same layer). Therefore, the piezoelectric layer 211 shown in FIG. 18F may have a resonant frequency of 30 MHz or less by having a 1-3 complex. Without being limited thereto, the resonant frequency of the piezoelectric layer 211 may be changed by at least one or more of the shape, length, and thickness of the piezoelectric layer.

[0172] According to another embodiment, as shown in FIG. 18G, among the plurality of first portions 211a, six adjacent first portions 211a may be arranged adjacent to each other to form a hexagon (or regular hexagon). The vertices of the six adjacent first portions 211a forming the hexagon may be arranged adjacent to the center (or the exact center) of the hexagon. The second portion 211b may be configured to surround each of the plurality of first portions 211a, and may be connected or bonded to the side of each of the plurality of first portions 211a. Each of the plurality of first portions 211a and the second portion 211b may be arranged (or aligned) next to each other on the same plane (or the same layer). Therefore, the piezoelectric layer 211 shown in FIG. 18G may be realized as a vibration source (or vibrator) having a 1-3 complex and having a nearly circular shape, thereby improving vibration characteristics or acoustic output characteristics and having a resonance frequency of 30 MHz or less. Without being limited thereto, the resonant frequency of the piezoelectric layer 211 may be altered by at least one or more of the shape, length, and thickness of the piezoelectric layer.

[0173] Referring to Figures 18F and 18G, among the multiple first portions 211a having a triangular shape, adjacent 2N (N is a natural number greater than or equal to 2) first portions 211a can be arranged adjacent to each other to form a 2N-sided triangle shape.

[0174] In FIGS. 18A to 18G, each of the first portions 211a according to the embodiments of the present specification may be composed of an inorganic material portion. The inorganic material portion may include a piezoelectric material or an electroactive material. The piezoelectric material or the electroactive material has a characteristic that a potential difference is generated by dielectric polarization due to a change in the relative positions of positive (+) ions and negative (-) ions when a pressure or twist phenomenon acts on a crystal structure due to an external force, and vibration is generated by an electric field due to an oppositely applied voltage. As described in FIGS. 16 and 17, a first surface of each of the first portions 211a may be electrically connected to the first electrode layer 213, and a second surface of each of the first portions 211a may be electrically connected to the second electrode layer 215.

[0175] In FIG. 18A to FIG. 18G, the inorganic material portion formed in each of the plurality of first portions 211a may be formed of a ceramic-based material capable of realizing a relatively high vibration, or may be formed of a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure may have a piezoelectric and inverse piezoelectric effect and may be a plate-like structure having orientation. The perovskite crystal structure may be represented by a chemical formula of ABO3, in which the A site is made of a divalent metal element and the B site is made of a tetravalent metal element. As an example, in the chemical formula of ABO3, the A site and the B site may be cations, and O may be an anion. For example, the inorganic material portion may include at least one of PbTiO3, PbZrO3, PbZrTiO3, BaTiO3, and SrTiO3, but is not limited thereto.

[0176] The perovskite crystal structure can generate a piezoelectric effect by changing the polarization as the position of the central ion, for example, titanium (Ti) ion in the case of PbTiO3, fluctuates due to external stress or magnetic field. For example, the perovskite crystal structure can generate a piezoelectric effect by changing from a cubic shape, which is a symmetric structure, to an unsymmetric structure such as a tetragonal, orthorhombic, or rhombohedral shape due to external stress or magnetic field. Since the polarization is high at the morphotropic phase boundary of the tetragonal and rhombohedral structures, which have an asymmetric structure, and the polarization can be easily rearranged, the perovskite crystal structure can have high piezoelectric properties.

[0177] According to an embodiment of the present specification, the inorganic material portion configured in each of the plurality of first portions 211a may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but is not limited thereto.

[0178] According to another embodiment, the inorganic material portion of each of the first portions 211a may include, but is not limited to, a PZT (lead zirconate titanate)-based material including lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (lead zirconate nickel niobate)-based material including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), or may include, but is not limited to, at least one of CaTiO3, BaTiO3, and SrTiO3 that does not include lead (Pb).

[0179] According to another embodiment, the inorganic material portion formed in each of the first portions 211a has a piezoelectric deformation coefficient (piezoelectric constant) (d 33) and has a piezoelectric deformation coefficient of 1000 pC / N or more. In order to be applicable to large-sized display panels and to have sufficient vibration or piezoelectric properties, a high piezoelectric deformation coefficient (d 33 For example, the inorganic material portion may include a PZT-based material (PbZrTiO3) as a main component, a softener dopant material doped in the A site (Pb), and a relaxor ferroelectric material doped in the B site (ZrTi).

[0180] The soft dopant material can improve the piezoelectric and dielectric properties of the inorganic material portion, for example, the piezoelectric deformation coefficient (d 33 ) can be increased. The inventors of the present specification have found that when the soft Na dopant material is composed of a +1 valent element, the piezoelectric and dielectric properties are reduced. For example, the inventors of the present specification have found that when the soft Na dopant material is composed of potassium (K) and rubidium (Rb), the piezoelectric and dielectric properties are reduced. Thus, the inventors of the present specification have found through multiple experiments that the soft Na dopant material must be composed of +2 to +3 valent elements in order to improve the piezoelectric and dielectric properties. The soft Na dopant material according to the embodiments of the present specification can include +2 to +3 valent elements. The soft Na dopant material can be included in the PZT-based material (PbZrTiO3) to form a morphotropic phase boundary (MPB), thereby improving the piezoelectric and dielectric properties. For example, the soft dopant material may include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, ions of a soft dopant material (Sr) doped into a PZT-based material (PbZrTiO3) may be used. 2+ , B.A. 2+ , La 2+ , Nd 3+ , Ca 2+ , Y 3+, Er 3+ , Yb 3+ ) replaces a portion of lead (Pb) in the PZT-based material (PbZrTiO3), and the amount of substitution can be 2 to 20 mol%. For example, if the amount of substitution is less than 2 mol% or exceeds 20 mol%, the perovskite crystal structure collapses, and the electric coupling coefficient (kP) and the piezoelectric deformation coefficient (d 33 ) can be reduced. When a soft dopant material is substituted, a morphotropic phase boundary can be formed, and high piezoelectric and dielectric properties can be obtained at the morphotropic phase boundary, so that a vibration device having high piezoelectric and dielectric properties can be realized.

[0181] According to an embodiment of the present specification, the relaxor ferroelectric material doped in the PZT-based material (PbZrTiO3) can improve the electrical deformation characteristics of the inorganic material part. The relaxor ferroelectric material according to the embodiment of the present specification may include, but is not limited to, a PMN (lead magnesium niobate)-based material or a PNN (lead nickel niobate)-based material. The PMN-based material may include lead (Pb), magnesium (Mg), and niobium (Nb), and may be, for example, Pb(Mg,Nb)O3. The PNN-based material may include lead (Pb), nickel (Ni), and niobium (Nb), and may be, for example, Pb(Ni,Nb)O3. For example, the relaxor ferroelectric material doped in the PZT-based material (PbZrTiO3) may substitute a part of each of zirconium (Zr) and titanium (Ti) with the PZT-based material (PbZrTiO3), and the substitution amount may be 5 to 25 mol%. For example, when the substitution amount is less than 5 mol% or exceeds 25 mol%, the perovskite crystal structure is destroyed, and the electric coupling coefficient (kP) and the piezoelectric deformation coefficient (d 33 ) may decrease.

[0182] According to an embodiment of the present specification, the inorganic material portion formed in each of the plurality of first portions 211a may further include a donor material doped in the B site (ZrTi) of the PZT-based material (PbZrTiO3) for additional improvement of the piezoelectric coefficient. For example, the donor material doped in the B site (ZrTi) may include an element with a valence of +4 to +6. For example, the donor material doped in the B site (ZrTi) may include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0183] The inorganic material portion formed in each of the first portions 211a according to the embodiment of the present specification can be expressed by the following formula:

[0184] [Formula 1] (Pb A-B C B )((Mg 1 / 3 Nb 2 / 3 ) a (Ni 1 / 3 Nb 2 / 3 ) b Zr c Ti d )O3

[0185] In the formula, C can be any one of calcium (Ca), strontium (Sr), and barium (Ba). a+b+c+d=1, 0.02≦B≦0.20, 0.80≦AB≦0.98, 0.05≦a≦0.25, 0.05≦b≦0.25, 0.10≦c≦0.50, and 0.10≦d≦0.50.

[0186] According to an embodiment of the present specification, the inorganic material portion formed in the first portions 211a has a piezoelectric deformation coefficient (d 33 ) can have a C / N or more, it is possible to realize a vibration device with improved vibration characteristics. For example, a vibration device with improved vibration characteristics can be realized in a large-area display device.

[0187] 18A to 18G, the second portion 211b may be disposed between the first portions 211a or may be disposed to surround each of the first portions 211a. As a result, the piezoelectric layer 211 of the vibration structure 210 or the vibration device may increase the vibration energy due to the link in the unit lattice of the first portion 211a by the second portion 211b, so that the vibration characteristics may be increased and the piezoelectric characteristics and flexibility may be ensured. For example, the second portion 211b may be any one of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but is not limited thereto.

[0188] The second portion 211b according to the embodiment of the present specification may be composed of an organic material portion. For example, the organic material portion may be disposed between the inorganic material portions to absorb impacts applied to the inorganic material portions (or the first portion), and may improve durability of the piezoelectric layer 211 or the vibration device of the vibration array 210 by releasing stress concentrated on the inorganic material portions, and may provide flexibility to the piezoelectric layer 211 or the vibration device of the vibration array 210.

[0189] The second portion 211b according to the embodiment of the present specification may have a lower modulus and viscoelasticity than the first portion 211a, thereby improving the reliability of the first portion 211a which is vulnerable to impact due to the brittle characteristics of the first portion 211a. For example, the second portion 211b may be made of a material having a loss factor of 0.01 to 1 and a modulus of 0.1 to 10 [GPa].

[0190] The organic material portion of the second portion 211b may include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having a flexible characteristic compared to the inorganic material portion of the first portion 211a. For example, the second portion 211b may be expressed as a flexible adhesive portion, an elastic portion, a bending portion, a damping portion, or a ductile portion, but is not limited thereto.

[0191] The piezoelectric layer 211 of the vibration structure 210 according to various embodiments of the present specification may have the form of a single thin film by arranging (or connecting) a plurality of first portions 211a and second portions 211b on the same plane and / or side by side with each other. For example, the piezoelectric layer 211 may vibrate in the vertical direction by the first portion 211a having vibration characteristics, and may bend into a curved shape by the second portion 211b having flexibility. In addition, in the piezoelectric layer 211 of the vibration structure 210 according to various embodiments of the present specification, the size of the first portion 211a and the size of the second portion 211b may be set according to the piezoelectric characteristics and flexibility required for the piezoelectric layer 211. Therefore, the ratio of the width of the first portion 211a to the second portion 211b may be changed according to the application and / or the associated needs. As an example, in the case of a piezoelectric layer 211 that requires piezoelectric characteristics rather than flexibility, the size of the first portion 211a may be set to be larger than the size of the second portion 211b. As another embodiment, in the case of piezoelectric layer 211 that requires flexibility rather than piezoelectric properties, the size of second portion 211b can be set to be larger than the size of first portion 211a. Therefore, since the size of piezoelectric layer 211 can be adjusted according to the required properties, there is an advantage that the design of piezoelectric layer 211 is easy.

[0192] Fig. 19 is a diagram showing a vibration device according to another embodiment of the present specification, which is obtained by modifying the structure of the vibration structure and the conductive lines in the vibration device shown in Fig. 15. Therefore, in the following, the description of the remaining configurations other than the vibration structure, the conductive lines, and the configurations related thereto will be omitted or simplified. The cross section of the line IV-IV' shown in Fig. 19 is shown in Fig. 17.

[0193] Referring to FIG. 19, a vibration device according to another embodiment of the present specification is substantially the same as the vibration structure shown in FIG. 15, except that the vibration structure 210 is expanded to have a relatively wider size compared to the vibration structure shown in FIG. 15, so a duplicated description thereof will be omitted.

[0194] In a vibration device according to another embodiment of the present specification, a flexible cable 230 may include a base member 11, a conductive layer 13 having first and second conductive lines 13-1, 13-2, and a protective layer 15. The flexible cable 230 has substantially the same configuration as the flexible cable 230 described in Figures 1 to 3, except that the conductive layer 13 includes first and second conductive lines 13-1, 13-2, and therefore a duplicated description thereof will be omitted.

[0195] Each of the first and second conductive lines 13-1, 13-2 may include a first line 13a disposed on the base member 11, a second line 13b extending from the first line 13a along the second direction (Y direction) through the side of the base member 11 onto the vibration structure 210, and at least one third line 13c extending parallel to the first direction (X direction) and protruding from the second line 13b. Each of the first and second conductive lines 13-1, 13-2 is substantially the same as the first and second conductive lines 13-1, 13-2 described in FIG. 12, and therefore a duplicate description thereof will be omitted.

[0196] Each of the second line 13b and the at least one third line 13c of the first conductive line 13-1 may be electrically connected to the first electrode layer 213 of the vibrating structure 210. For example, the second line 13b of the first conductive line 13-1 may be bent from one side of the vibrating structure 210 toward the first electrode layer 213 of the vibrating structure 210 and electrically connected to one side end portion of the first electrode layer 213 along the second direction (Y direction). The at least one third line 13c of the first conductive line 13-1 may be disposed on the first electrode layer 213 along the first direction (X direction) and electrically connected to the first electrode layer 213.

[0197] Each of the second line 13b and the at least one third line 13c of the second conductive line 13-2 may be electrically connected to the second electrode layer 215 of the vibrating structure 210. For example, the second line 13b of the second conductive line 13-2 may be bent from one side of the vibrating structure 210 toward the second electrode layer 215 of the vibrating structure 210 and electrically connected to one side end portion of the second electrode layer 215 along the second direction (Y direction). The at least one third line 13c of the second conductive line 13-2 may be disposed on the second electrode layer 215 along the first direction (X direction) and electrically connected to the second electrode layer 215.

[0198] Therefore, the vibration device according to the other embodiments of the present specification can have the same effect as the vibration device shown in Fig. 15 to Fig. 17. For example, the vibration device according to the embodiments of the present specification does not require a patterning process for forming wiring and pads on each of the first protection member 250 and the second protection member 270 and a soldering process between the vibration structure 210 and the flexible cable 230 due to the integrated structure between the vibration structure 210 and the flexible cable 230, so that the structure and manufacturing process can be simplified. In addition, the vibration device according to the embodiments of the present specification does not require a conductive sheet (or a conductive film) between each of the first protection member 250 and the second protection member 270 and the vibration structure 210 because wiring and pads are not arranged on each of the first protection member 250 and the second protection member 270, and can have a thin thickness due to the omission of the conductive sheet. In addition, the vibration device according to the embodiment of the present specification can complement the electrical characteristics of the first electrode layer 213 and the second electrode layer 215 disposed on the vibration structure 210 by directly supplying driving power to the vibration structure 210 via the flexible cable 230. The vibration device according to the other embodiment of the present specification can have uniform vibration characteristics over the entire area of ​​the vibration structure 210 by supplying uniform driving power to the vibration structure 210 via the third line 13c of each of the first and second conductive lines 13-1 and 13-2.

[0199] FIG. 20 is a diagram showing a vibration device according to another embodiment of the present specification, and FIG. 21 is a cross-sectional view taken along line V-V' shown in FIG. 20, showing a vibration device integrated with the flexible cable shown in FIG. 7.

[0200] 20 and 21, a vibration device according to another embodiment of the present disclosure may include a vibrating structure 210 and a flexible cable 230.

[0201] The vibrating structure 210 may include a first vibrating module 210A and a second vibrating module 210B that are spaced apart and electrically isolated from each other.

[0202] According to an embodiment of the present specification, the first vibration module 210A and the second vibration module 210B may be disposed between the first protection member 250 and the second protection member 270 so as to be spaced apart from each other along the first direction (X direction). For example, the first protection member 250 and the second protection member 270 may be commonly connected to the first and second vibration modules 210A and 210B or commonly support the first and second vibration modules 210A and 210B, thereby driving the first and second vibration modules 210A and 210B as one vibration device (or a single vibration device). For example, the first and second vibration modules 210A and 210B may be tiled (or integrated) at regular intervals on the protection members 250 and 270, thereby realizing them as one vibration device (or a single vibration device) that does not drive independently but drives in the form of a complete single unit. According to an embodiment of the present specification, the first and second vibration modules 210A, 210B can be driven as a complete vibration device by arranging or tiling them to have a separation distance (or gap) of 0.1 mm or more and less than 3 cm, and the reproduction band of the sound and the sound pressure characteristics of the sound generated in conjunction with the vibration of the complete single body of the first and second vibration modules 210A, 210B can be increased. For example, in order to increase the reproduction band of the sound generated in conjunction with the vibration of the complete single body of the first and second vibration modules 210A, 210B and to increase the sound pressure characteristics of the low-frequency band sound, for example, at 500 Hz or less, the first and second vibration modules 210A, 210B can be arranged on the same plane with a separation distance of 0.1 mm or more and less than 5 mm, but is not limited thereto.

[0203] According to embodiments of the present specification, when the first and second vibration modules 210A, 210B are arranged with a gap of less than 0.1 mm or no gap at all, the reliability of the vibration modules 210A, 210B or the vibrating structure 210 may be reduced due to cracks or damage caused by physical contact between each other when the vibration modules 210A, 210B vibrate respectively.

[0204] According to the embodiment of the present specification, when the first and second vibration modules 210A, 210B are arranged at an interval of 3 cm or more, the first and second vibration modules 210A, 210B vibrate independently of each other and do not operate as a complete vibration device, so that the reproduction band and sound pressure characteristics of the sound generated in conjunction with the vibration of the first and second vibration modules 210A, 210B may be reduced. For example, when the first and second vibration modules 210A, 210B are arranged at an interval of 3 cm or more, the acoustic characteristics and sound pressure characteristics in the low frequency band, for example, below 500 Hz, may be reduced.

[0205] According to an embodiment of the present specification, when the first and second vibration modules 210A, 210B are arranged at an interval of 5 mm, the first and second vibration modules 210A, 210B do not operate as a complete vibration device, and therefore the acoustic characteristics and sound pressure characteristics may be degraded in the low frequency range, for example below 200 Hz.

[0206] According to the embodiment of the present specification, when the first and second vibration modules 210A, 210B are arranged at an interval of 1 mm, the first and second vibration modules 210A, 210B vibrate as a complete vibration device, thereby increasing the reproduction band of sound and increasing the sound pressure characteristics of low-frequency sound, for example, sound pressure characteristics below 500 Hz. For example, when the first and second vibration modules 210A, 210B are arranged at an interval of 1 mm, the vibration structure 210 has an effect of increasing the area by optimizing the separation distance between the first and second vibration modules 210A, 210B, and can be driven as a large-area vibrating body by the vibration of the first and second vibration modules 210A, 210B as a complete single body, thereby increasing or improving the reproduction band of sound generated in conjunction with the vibration of the large area of ​​the vibration structure 210 and the acoustic characteristics and sound pressure characteristics in the low-frequency band.

[0207] Therefore, in order to realize a complete single-body vibration (or one vibration device) of the first and second vibration modules 210A, 210B, the separation distance between the first and second vibration modules 210A, 210B can be set to 0.1 mm or more and less than 3 cm. In addition, in order to realize a single-body vibration (or one vibration device) of the first and second vibration modules 210A, 210B and increase the sound pressure characteristics of the sound in the low-frequency range, the separation distance between the first and second vibration modules 210A, 210B can be set to 0.1 mm or more and less than 5 mm.

[0208] Each of the first vibration module 210A and the second vibration module 210B can include a piezoelectric layer 211, a first electrode layer 213, and a second electrode layer 215. The piezoelectric layer 211, the first electrode layer 213, and the second electrode layer 215 of the first vibration module 210A and the second vibration module 210B are substantially the same as the piezoelectric layer 211, the first electrode layer 213, and the second electrode layer 215 of the vibration structure 210 described in Figures 15 to 18G, respectively, so they are denoted by the same reference numerals and redundant description thereof will be omitted.

[0209] According to the embodiments of the present specification, the piezoelectric layer 211 of the first vibration module 210A can be configured in the same manner as any one of the piezoelectric layers 211 described in Figures 18A to 18G, and the piezoelectric layer 211 of the second vibration module 210B can be configured in the same manner as any one of the piezoelectric layers 211 described in Figures 18A to 18G. Furthermore, the piezoelectric layer 211 of the first vibration module 210A and the piezoelectric layer 211 of the second vibration module 210B can be configured with the same piezoelectric layer or different piezoelectric layers among the piezoelectric layers 211 described in Figures 18A to 18G.

[0210] The flexible cable 230 includes a base member 11, a conductive layer 13 having first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4, and a protective layer 15, and the first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4 are grouped into a first electrode group 13G1 and a second electrode group 13G2. This is essentially the same as the flexible cable described in FIG. 7, so a duplicated description thereof will be omitted.

[0211] In the flexible cable 230, the second lines 13b of the first conductive line 13-1 and the second conductive line 13-2 belonging to the first electrode group 13G1 may be electrically connected to the first vibration module 210A. The second lines 13b of the third conductive line 13-3 and the fourth conductive line 13-4 belonging to the second electrode group 13G2 may be electrically connected to the second vibration module 210B.

[0212] According to an embodiment of the present specification, in the first electrode group 13G1, the second line 13b of the first conductive line 13-1 may be bent from one side of the first vibration module 210A toward the first electrode layer 213 of the first vibration module 210A and be electrically connected to the first electrode layer 213 along the second direction (Y direction). In the first electrode group 13G1, the second line 13b of the second conductive line 13-2 may be bent from one side of the first vibration module 210A toward the second electrode layer 215 of the first vibration module 210A and be electrically connected to the second electrode layer 215 along the second direction (Y direction).

[0213] According to an embodiment of the present specification, in the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent from one side of the second vibration module 210B toward the first electrode layer 213 of the second vibration module 210B and be electrically connected to the first electrode layer 213 along the second direction (Y direction). In the second electrode group 13G2, the second line 13b of the fourth conductive line 13-4 may be bent from one side of the second vibration module 210B toward the second electrode layer 215 of the second vibration module 210B and be electrically connected to the second electrode layer 215 along the second direction (Y direction).

[0214] According to another embodiment, in the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent from one side of the second vibration module 210B toward the second electrode layer 215 of the second vibration module 210B to be electrically connected to the second electrode layer 215. In the second electrode group 13G2, the second line 13b of the fourth conductive line 13-4 may be bent from one side of the second vibration module 210B toward the first electrode layer 213 of the second vibration module 210B to be electrically connected to the first electrode layer 213.

[0215] Therefore, the vibration device according to the other embodiments of the present specification can have the same effect as the vibration device shown in Figs. 15 to 17. For example, the vibration device according to the embodiments of the present specification does not require a patterning process for forming wiring and pads on each of the first protection member 250 and the second protection member 270 and a soldering process between the vibration structure 210 and the flexible cable 230 due to the integrated structure between the vibration structure 210 and the flexible cable 230, so that the structure and manufacturing process can be simplified. In addition, the vibration device according to the embodiments of the present specification does not require a conductive sheet (or a conductive film) to be disposed between each of the first protection member 250 and the second protection member 270 and the vibration structure 210 because the wiring and pads are not disposed on each of the first protection member 250 and the second protection member 270. Therefore, a vibration device having a thin thickness can be realized by omitting the conductive sheet. In addition, the flexible vibration unit according to the embodiment of the present specification can complement the electrical characteristics of the first electrode layer 213 and the second electrode layer 215 arranged on the vibration structure 210 by supplying a driving power source to the vibration structure 210 via the flexible cable 230. A vibration device according to another embodiment of the present specification can simultaneously drive two vibration modules 210A and 210B and individually drive them with a driving power source supplied via one flexible cable 230, thereby simplifying the electrical connection structure between the vibration structure 210 and the flexible cable 230 for driving the two vibration modules 210A and 210B.

[0216] Alternatively, in the vibration device described in Fig. 20 and Fig. 21, the flexible cable 230 can be changed to the flexible cable described in Fig. 9 or the flexible cable described in Fig. 13. For example, the vibration device with the flexible cable integrated therein described in Fig. 9 can improve the adhesive properties between the vibration structure 210 and the protective members 250, 270 by the multiple straps 13s and the support 17 described in Fig. 9, and can minimize or prevent defects caused by breakage of the conductive lines during the manufacturing process by the multiple straps 13s. For example, the vibration device with the flexible cable integrated therein described in Fig. 13 can improve the adhesive properties between the vibration structure 210 and the protective members 250, 270 by supporting the second line 13b of the conductive line by the line support part 19 described in Fig. 13, and can improve the reliability of the flexible cable.

[0217] Fig. 22 is a diagram showing a vibration device according to another embodiment of the present specification, which is a modified version of the vibration structure of the vibration device shown in Fig. 20 and Fig. 21. Therefore, in the following, redundant descriptions of the remaining configurations, excluding the vibration structure and its related configurations, will be omitted or simplified. The cross section of line V-V' shown in Fig. 22 is shown in Fig. 21.

[0218] Combining FIG. 22 with FIG. 21, in a vibration device according to another embodiment of the present specification, the vibration structure 210 may include first to fourth vibration modules 210A, 210B, 210C, and 210D that are electrically separated and spaced apart from each other along each of the first direction (X direction) and the second direction (Y direction). For example, the first to fourth vibration modules 210A, 210B, 210C, and 210D may be arranged or disposed in a 2×2 configuration. Thus, the vibration structure 210 may be a vibration array structure, a vibration array section, or a tiling vibration structure by including the first to fourth vibration modules 210A, 210B, 210C, and 210D that are arranged at regular intervals or tiled.

[0219] The first and second vibration modules 210A, 210B can be spaced apart from each other along the first direction (X direction). The third and fourth vibration modules 210C, 210D can be spaced apart from each other along the second direction (Y direction) while being spaced apart from each other along the first direction (X direction). The first and third vibration modules 210A, 210C can face each other and be spaced apart from each other along the second direction (Y direction). The second and fourth vibration modules 210B, 210D can face each other and be spaced apart from each other along the second direction (Y direction).

[0220] The first to fourth vibration modules 210A, 210B, 210C, and 210D can be disposed between the first protective member 250 and the second protective member 270. For example, the first protective member 250 and the second protective member 270 can act to drive the first to fourth vibration modules 210A, 210B, 210C, and 210D as one vibration device (or a single vibration device) by connecting the first to fourth vibration modules 210A, 210B, 210C, and 210D or supporting them in common. For example, the first to fourth vibration modules 210A, 210B, 210C, and 210D can be driven as one vibration device (or a single vibration device) by tiling them at regular intervals on the protective members 250 and 270.

[0221] According to the embodiments of the present specification, as described in Figures 19 and 20, the first to fourth vibration modules 210A, 210B, 210C, and 210D can be arranged (or tiled) at intervals of 0.1 mm or more and less than 3 cm along each of the first direction (X direction) and the second direction (Y direction) in order to operate as a complete vibration device, to vibrate a complete single body, or to vibrate a large area of ​​the vibration structure 210, and more preferably, can be arranged (or tiled) at intervals of 0.1 mm or more and less than 5 mm.

[0222] Each of the first to fourth vibration modules 210A, 210B, 210C, and 210D can include a piezoelectric layer 211, a first electrode layer 213, and a second electrode layer 215. The piezoelectric layer 211, the first electrode layer 213, and the second electrode layer 215 of each of the first to fourth vibration modules 210A, 210B, 210C, and 210D are substantially the same as the piezoelectric layer 211, the first electrode layer 213, and the second electrode layer 215 of the vibration structure 210 described in Figures 15 to 18G, so they are given the same reference numerals and redundant description thereof will be omitted.

[0223] According to the embodiments of the present specification, each of the first to fourth vibration modules 210A, 210B, 210C, and 210D may include any one of the piezoelectric layers 211 described in Figures 18A to 18G, or may include a different piezoelectric layer 211 (or vibration layer).

[0224] According to an embodiment of the present specification, some of the vibration structures and the remaining vibration structures in the first to fourth vibration modules 210A, 210B, 210C, and 210D may each include different piezoelectric layers 211 from the piezoelectric layers 211 described in Figures 18A to 18G.

[0225] The flexible cable 230 includes a base member 11, a conductive layer 13 having first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4, and a protective layer 15, and the first to fourth conductive lines 13-1, 13-2, 13-3, and 13-4 are grouped into a first electrode group 13G1 and a second electrode group 13G2. This is essentially the same as the flexible cable described in FIG. 7, so a duplicated description thereof will be omitted.

[0226] In the flexible cable 230, the second lines 13b of the first and second conductive lines 13-1, 13-2 belonging to the first electrode group 13G1 can be electrically (or commonly) connected to the first and third vibration modules 210A, 210C, respectively. The second lines 13b of the third and fourth conductive lines 13-3, 13-4 belonging to the second electrode group 13G2 can be electrically (or commonly) connected to the second and fourth vibration modules 210B, 210D, respectively.

[0227] According to an embodiment of the present specification, in the first electrode group 13G1, the second line 13b of the first conductive line 13-1 may be bent from one side of the first vibration module 210A toward the first electrode layer 213 of each of the first and third vibration modules 210A and 210C, and may be electrically connected to the first electrode layer 213 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction). The second line 13b of the second conductive line 13-2 may be bent from one side of the first vibration module 210A toward the second electrode layer 215 of each of the first and third vibration modules 210A and 210C, and may be electrically connected to the second electrode layer 215 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction).

[0228] According to an embodiment of the present specification, in the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent from one side of the second vibration module 210B toward the first electrode layer 213 of each of the second and fourth vibration modules 210B and 210D, and may be electrically connected to the first electrode layer 213 of each of the second and fourth vibration modules 210B and 210D along the second direction (Y direction). The second line 13b of the fourth conductive line 13-4 may be bent from one side of the second vibration module 210B toward the second electrode layer 215 of each of the second and fourth vibration modules 210B and 210D, and may be electrically connected to the second electrode layer 215 of each of the second and fourth vibration modules 210B and 210D along the second direction (Y direction).

[0229] According to another embodiment, in the second electrode group 13G2, the second line 13b of the third conductive line 13-3 may be bent from one side of the second vibration module 210B toward the second electrode layer 215 of the second and fourth vibration modules 210B and 210D, respectively, to be electrically connected to the second electrode layer 215 of the second and fourth vibration modules 210B and 210D, respectively. The second line 13b of the fourth conductive line 13-4 may be bent from one side of the second vibration module 210B toward the first electrode layer 213 of the second and fourth vibration modules 210B and 210D, respectively, to be electrically connected to the first electrode layer 213 of the second and fourth vibration modules 210B and 210D, respectively.

[0230] Therefore, the vibration device according to the other embodiments of the present specification can have the same effect as the vibration device shown in Fig. 20. Also, the vibration device according to the other embodiments of the present specification can simultaneously drive the four vibration modules 210A, 210B, 210C, and 210D by a driving power source supplied via one flexible cable 230, thereby simplifying the electrical connection structure between the vibration structure 210 and the flexible cable 230 for driving the four vibration modules 210A, 210B, 210C, and 210D.

[0231] Alternatively, in the vibration device described in Fig. 21 and Fig. 22, the flexible cable 230 can be changed to the flexible cable described in Fig. 9 or the flexible cable described in Fig. 13. For example, the vibration device with the flexible cable integrated therein described in Fig. 9 can improve the adhesive properties between the vibration structure 210 and the protective members 250, 270 by the multiple straps 13s and the support 17 described in Fig. 9, and the multiple straps 13s can minimize or prevent defects caused by breakage of the conductive lines during the manufacturing process. For example, the vibration device with the flexible cable integrated therein described in Fig. 13 can improve the adhesive properties between the vibration structure 210 and the protective members 250, 270 by supporting the second line 13b of the conductive line by the line support part 19 described in Fig. 13, and can improve the reliability of the flexible cable.

[0232] FIG. 23 shows a vibration device according to another embodiment of the present specification, and FIG. 24 is a cross-sectional view taken along line VI-VI' shown in FIG. 23, in which the flexible cable of the vibration device shown in FIG. 22 is replaced with the flexible cable shown in FIG. 12.

[0233] 23 and 24, in a vibration device according to another embodiment of the present specification, a vibration structure 210 may include first to fourth vibration modules 210A, 210B, 210C, and 210D that are spaced apart and electrically isolated from each other along a first direction (X direction) and a second direction (Y direction). The vibration structure 210 is substantially the same as the vibration structure 210 described in FIG. 22, so a duplicated description thereof will be omitted.

[0234] In a vibration device according to another embodiment of the present specification, the flexible cable 230 may include a base member 11, a conductor layer 13 having first and second conductive lines 13-1 and 13-2, and a protective layer 15. Each of the first and second conductive lines 13-1 and 13-2 may include a first line 13a disposed on the base member 11, a second line 13b extending from the first line 13a along the second direction (Y direction) through a side surface 11s of the base member 11 onto the vibration structure 210, and 3-1 and 3-2 line portions 13c-1 and 13c-2 protruding from the second line 13b in the first direction (X direction). The flexible cable 230 has substantially the same configuration as the first and second conductive lines 13-1 and 13-2 described in FIG. 12, except for the 3-1 and 3-2 line portions 13c-1 and 13c-2, and therefore will not be described again.

[0235] In the flexible cable 230 according to an embodiment of the present specification, the second line 13b of each of the first and second conductive lines 13-1, 13-2 may be electrically (or commonly) connected to each of the first vibration module 210A and the third vibration module 210C tiled to the vibration structure 210.

[0236] According to an embodiment of the present specification, the second line 13b (or the first finger line) of the first conductive line 13-1 may be bent from one side of the first vibration module 210A toward the first electrode layer 213 of each of the first and third vibration modules 210A and 210C, and may be electrically connected to the first electrode layer 213 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction). The second line 13b (or the second finger line) of the second conductive line 13-2 may be bent from one side of the first vibration module 210A toward the second electrode layer 215 of each of the first and third vibration modules 210A and 210C, and may be electrically connected to the second electrode layer 215 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction).

[0237] According to another embodiment, the second line 13b (or the first finger line) of the first conductive line 13-1 may be bent from one side of the first vibration module 210A toward the second electrode layer 215 of each of the first and third vibration modules 210A and 210C, and electrically connected to the second electrode layer 215 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction). The second line 13b (or the second finger line) of the second conductive line 13-2 may be bent from one side of the first vibration module 210A toward the first electrode layer 213 of each of the first and third vibration modules 210A and 210C, and electrically connected to the first electrode layer 213 of each of the first and third vibration modules 210A and 210C along the second direction (Y direction).

[0238] According to an embodiment of the present specification, the 3-1 line portion 13c-1 may extend along the first direction (X direction) from each of the second line 13b (or first finger line) of the first conductive line 13-1 and the second line 13b (or second finger line) of the second conductive line 13-2, and may be electrically connected to the first and second vibration modules 210A, 210B.

[0239] The 3-1 line portion 13c-1 according to an embodiment of the present specification may include at least one 1-1 wing line 13c11 extending from one side wall of the second line 13b (or first finger line) of the first conductive line 13-1 along the first direction (X direction) and electrically connected to the first vibration module 210A, and at least one 1-2 wing line 13c12 extending from the other side wall of the second line 13b of the first conductive line 13-1 along the first direction (X direction) and electrically connected to each of the first and second vibration modules 210A and 210B. The 3-1 line portion 13c-1 may include at least one 2-1 wing line 13c21 extending from one side wall of the second line 13b (or the second finger line) of the second conductive line 13-2 along the first direction (X direction) and electrically connected to the first vibration module 210A, and at least one 2-2 wing line 13c22 extending from the other side wall of the second line 13b of the second conductive line 13-2 along the first direction (X direction) and electrically connected to each of the first and second vibration modules 210A and 210B.

[0240] According to an embodiment of the present specification, when the second line 13b of the first conductive line 13-1 is electrically connected to the first electrode layer 213 of the first vibration module 210A and the second line 13b of the second conductive line 13-2 is electrically connected to the second electrode layer 215 of the first vibration module 210A, at least one 1-1 wing line 13c11 can be electrically connected to the first electrode layer 213 of the first vibration module 210A, and at least one 1-2 wing line 13c12 can be electrically connected to the first electrode layer 213 of each of the first and second vibration modules 210A, 210B. At least one 2-1 wing line 13c21 can be electrically connected to the second electrode layer 215 of the first vibration module 210A, and at least one 2-2 wing line 13c22 can be electrically connected to the second electrode layer 215 of each of the first and second vibration modules 210A, 210B.

[0241] According to an embodiment of the present specification, the 3-2 line portion 13c-2 extends along the first direction (X direction) from each of the second line 13b (or first finger line) of the first conductive line 13-1 and the second line 13b (or second finger line) of the second conductive line 13-2, and can be electrically connected to the third and fourth vibration modules 210C, 210D.

[0242] The 3-2 line portion 13c-2 according to the embodiments of the present specification may include at least one 3-1 wing line 13c31 extending from one side wall of the second line 13b (or the first finger line) of the first conductive line 13-1 along the first direction (X direction) and electrically connected to the third vibration module 210C, and at least one 3-2 wing line 13c32 extending from the other side wall of the second line 13b of the first conductive line 13-1 along the first direction (X direction) and electrically connected to each of the third and fourth vibration modules 210C and 210D. The 3-2 line portion 13c-2 may include at least one 4-1 wing line 13c41 extending from one side wall of the second line 13b (or the second finger line) of the second conductive line 13-2 along the first direction (X direction) and electrically connected to the second vibration module 210B, and at least one 4-2 wing line 13c42 extending from the other side wall of the second line 13b of the second conductive line 13-2 along the first direction (X direction) and electrically connected to each of the third and fourth vibration modules 210C and 210D.

[0243] According to an embodiment of the present specification, when the second line 13b of the first conductive line 13-1 is electrically connected to the first electrode layer 213 of the third vibration module 210C and the second line 13b of the second conductive line 13-2 is electrically connected to the second electrode layer 215 of the third vibration module 210C, at least one 3-1 wing line 13c31 can be electrically connected to the first electrode layer 213 of the third vibration module 210C, and at least one 3-2 wing line 13c32 can be electrically connected to the first electrode layer 213 of each of the third and fourth vibration modules 210C, 210D. At least one 4-1 wing line 13c41 can be electrically connected to the second electrode layer 215 of the third vibration module 210C, and at least one 4-2 wing line 13c42 can be electrically connected to the second electrode layer 215 of each of the third and fourth vibration modules 210C, 210D.

[0244] Therefore, the vibration device according to another embodiment of the present specification can simultaneously drive the four vibration modules 210A, 210B, 210C, and 210D by the driving power supplied through the second line 13b and the 3-1 and 3-2 line parts 13c-1 and 13c-2 of the first and second conductive lines 13-1 and 13-2, respectively, arranged on one flexible cable 230. This can simplify the electrical connection structure between the vibration structure 210 and the flexible cable 230 for driving the four vibration modules 210A, 210B, 210C, and 210D. In addition, the vibration device according to another embodiment of the present specification can reduce the number of terminals arranged on one flexible cable 230 for driving the four vibration modules 210A, 210B, 210C, and 210D.

[0245] As another embodiment, in the vibration device described in Fig. 23 and Fig. 24, the flexible cable 230 may further include the line support portion 19 of the flexible cable described in Fig. 13. As a result, in the vibration device according to another embodiment of the present specification, the second line 13b and the 3-1 and 3-2 line portions 13c-1 and 13c-2 of the first and second conductive lines 13-1 and 13-2 are supported by the line support portion 19 described in Fig. 13, thereby improving the adhesive properties between the vibration structure 210 and the protective members 250 and 270, and improving the reliability of the flexible cable.

[0246] 25 is a diagram showing a display device according to an embodiment of the present disclosure, and FIG 26 is a cross-sectional view taken along line VII-VII' shown in FIG 25.

[0247] 25 and 26, a display device according to an embodiment of the present specification may include a display panel 100 and a vibration device 200 disposed on the rear surface (or back surface) of the display panel 100.

[0248] The display panel 100 may display an image, for example, an electronic image or a digital image, for example, by outputting light to display an image.

[0249] According to an embodiment of the present specification, the display panel 100 may be any type of display panel or curved display panel, such as, but not limited to, a liquid crystal display panel, an organic light emitting display panel, a quantum dot light emitting display panel, a micro light emitting diode display panel, an electrophoretic display panel, or an electrowetting display panel. According to another embodiment, the display panel 100 may be a flexible display panel. For example, the display panel 100 may be, but is not limited to, a flexible liquid crystal display panel, a flexible organic light emitting display panel, a flexible quantum dot light emitting display panel, a flexible micro light emitting diode display panel, a flexible electrophoretic display panel, or a flexible electrowetting display panel. According to another embodiment, the display panel 100 may be a touch panel integrated display panel. For example, the touch panel integrated display panel may include a touch panel attached on the display panel or may include a touch electrode layer disposed inside the display panel.

[0250] The display panel 100 according to the embodiment of the present specification may include a display area that displays an image by driving a plurality of pixels arranged on a substrate, and a non-display area surrounding the display area. For example, the display panel 100 may realize the entire front surface of the substrate as the display area without the non-display area by using a bezel-less structure. For example, the display panel 100 may be a transparent display panel including a light-transmitting portion disposed in at least one pixel among the plurality of pixels.

[0251] The display panel 100 according to the embodiment of the present specification may display an image in a top emission type, a bottom emission type, or a dual emission type depending on the structure of a pixel array layer including an anode electrode, a cathode electrode, and an element layer. In the top emission type, visible light generated in the pixel array layer may be emitted to the front of a base substrate to display an image, and in the bottom emission type, visible light generated in the pixel array layer may be emitted to the rear of a base substrate to display an image. For example, the light emitting element layer may include an organic light emitting layer or a micro light emitting diode element electrically connected to each of the anode electrode and the cathode electrode. The micro light emitting diode element is a light emitting diode realized in the form of an integrated circuit (IC) or a chip, and may include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode may be commonly connected to the light emitting elements of the light emitting element layer provided in each pixel region.

[0252] The display panel 100 according to the embodiment of the present disclosure may include a curved portion that is curved or bent to have a certain radius of curvature.

[0253] The bent portion of the display panel 100 may be realized in at least one of one side edge portion and the other side edge of the display panel 100, which are arranged side by side. The one side edge and / or the other side edge of the display panel 100 where the bent portion is realized may include only the non-display area, or may include an edge portion of the display area and the entire non-display area. For example, the display panel 100 including the bent portion realized by bending the non-display area may have a one-sided bezel bent structure or a two-sided bezel bent structure. And, the display panel 100 including the bent portion realized by bending the edge of the display area and the non-display area may have a one-sided active bent structure or a two-sided active bent structure.

[0254] The display device according to the embodiment of the present specification may further include a support member 300 disposed on the rear surface of the display panel 100 , and a panel connecting member 400 disposed between the display panel 100 and the support member 300 .

[0255] The support member 300 may be expressed by other terms such as a cover bottom, a plate bottom, a back cover, a base frame, a metal frame, a metal chassis, a chassis base, an m-chassis, etc. Therefore, the support member 300 may be realized as any type of frame or plate-like structure disposed on the rear surface of the display panel 100. The support member 300 may be a rear structure.

[0256] The support member 300 may cover the rear surface of the display panel 100. For example, the support member 300 may cover the entire rear surface of the display panel 100 with the gap space (GS) therebetween. The support member 300 according to the embodiment of the present specification may include at least one of a glass material, a metal material, and a plastic material. For example, the glass support member 300 may be sapphire glass. For example, the metal support member 300 may be made of any one of aluminum, an aluminum alloy, a magnesium alloy, and an iron-nickel alloy.

[0257] The support member 300 according to the embodiment of the present specification may additionally cover the side of the display panel 100. For example, the support member 300 may include a rear part 310 that covers the rear surface of the display panel 100 with a gap space (GS) therebetween, and a side part 330 that is connected to an end of the rear part 310 and covers the side of the display panel 100. Without being limited thereto, the support member 300 may be a single body structure in which the rear part 310 and the side part 330 are integrally configured.

[0258] The side part 330 may be realized as a separate middle frame combined with the support member 300. In this case, the side part 330 realized as a middle frame may cover the entire side of the support member 300, for example, the side of the rear part 310 and the side of the display panel 100. For example, the side part 330 realized as a middle frame may be made of the same material as the support member 300, selected from metal and plastic materials, or may be made of a different material.

[0259] The support member 300 according to the embodiment of the present specification may be disposed at the rear end of the display panel 100 via the panel connecting member 400. For example, the panel connecting member 400 may be disposed between the rear end of the display panel 100 and the front end of the support member 300 to bond the display panel 100 and the support member 300. The panel connecting member 400 according to the embodiment of the present specification may be realized by, but is not limited to, a double-sided tape, a single-sided tape, or a double-sided adhesive foam pad.

[0260] The display device according to the embodiment of the present specification may further include a front member 500 covering at least a part of a front edge of the display panel 100. The front member 500 may have a frame shape having an opening overlapping a display area of ​​the display panel 100. For example, the front member 500 may support or fix the display panel 100 by combining with the side part 330 or the middle frame to cover the front edge of the display panel 100. The front member 500 is disposed at the front edge of the display panel 100 and directly exposed to a user (or viewer), which may reduce the aesthetic appearance of the design of the display device and increase the bezel width of the display device. In order to solve this problem, the display panel 100 may be connected to the support member 300 via the panel connecting member 400, thereby omitting (or removing) the front member 500, thereby reducing or eliminating the bezel width of the display device, thereby improving the aesthetic appearance of the design of the display device.

[0261] The vibration device 200 can be disposed on or coupled to the rear surface (or back surface) of the display panel 100. The vibration device 200 can be adhered to the rear surface of the display panel 100 via an adhesive member 150.

[0262] The adhesive member 150 according to the embodiment of the present specification may be disposed between the rear surface of the display panel 100 and the vibration device 200. As an example, the adhesive member 150 may include a double-sided tape or adhesive including an adhesive layer having excellent adhesion and bonding strength between the rear surface of the display panel 100 and the vibration device 200. For example, the adhesive layer of the adhesive member 150 may include, but is not limited to, epoxy, acrylic, silicone, or urethane. The adhesive layer of the adhesive member 150 may further include additives such as a tackifier, a wax component, or an antioxidant.

[0263] The adhesive member 150 according to another embodiment may further include a hollow portion provided between the display panel 100 and the vibration device 200. The hollow portion of the adhesive member 150 may provide an air gap between the display panel 100 and the vibration device 200. The air gap allows sound waves (or sound pressure) caused by the vibration of the vibration device 200 to be concentrated on the display panel 100 without being dispersed by the adhesive member 150, thereby minimizing vibration loss caused by the adhesive member 150 and increasing the sound pressure characteristics of the sound generated by the vibration of the display panel 100.

[0264] The vibration device 200 according to the embodiment of the present specification may be realized in a film form. Since the vibration device 200 is realized in a film form and may have a thickness thinner than the display panel 100, the thickness of the display panel 100 may not be increased by the arrangement of the vibration device 200. The vibration device 200 may be expressed as a sound generating module using the display panel 100 as a diaphragm, a sound generating device, a film actuator, a film type piezoelectric composite actuator, a film speaker, a film type piezoelectric speaker, a film type piezoelectric composite speaker, an ultrasonic transmitter / receiver, etc., but is not limited thereto.

[0265] The vibration device 200 according to the embodiment of the present specification includes any one of the vibration devices described with reference to FIGS. 15 to 24, and therefore a duplicated description thereof will be omitted.

[0266] 15 to 24, the vibration device 200 may be disposed on the rear surface of the display panel 100 so as to overlap with the display area of ​​the display panel 100. As an example, the vibration structure of the vibration device 200 may overlap with half or more of the display area of ​​the display panel 100. As another example, the vibration structure of the vibration device 200 may overlap with the entire display area of ​​the display panel 100.

[0267] The vibration device 200 according to the embodiment of the present specification can vibrate the display panel 100 by vibrating according to an electric signal applied via a flexible cable. For example, the vibration device 200 can directly vibrate the display panel 100 by vibrating according to an electric signal applied via a flexible cable. As an example, the vibration device 200 can vibrate the display panel 100 by vibrating according to a voice signal synchronized with an image displayed on the display panel 100. As another example, the vibration device 200 can vibrate the display panel 100 by vibrating according to a haptic feedback signal (or tactile feedback signal) synchronized with a user's touch on a touch panel (or a touch sensor layer) disposed on the display panel 100 or built into the display panel 100. Thus, the display panel 100 can vibrate according to the vibration of the vibration device 200 to provide at least one of audio and tactile feedback to the user (or viewer).

[0268] According to the embodiment of the present specification, when an AC voltage is applied to the inorganic material portion (or a plurality of first portions) disposed in the vibration structure, the inorganic material portion may vibrate by repeatedly contracting and expanding due to the inverse piezoelectric effect, and the display panel 100 may be vibrated through such vibration to provide an acoustic or haptic feedback to a user. For example, the vibration device 200 covers most of the area of ​​the display panel 100, so that the vibration generated by the vibration device 200 can vibrate the entire display panel 100, and thus the sense of localization of the sound generated by the vibration of the display panel 100 is high, and the satisfaction of the user may be improved. In addition, the contact area (or panel coverage) between the display panel 100 and the vibration device 200 may be increased, and the vibration area of ​​the display panel 100 may be increased, so that the sound in the mid-low range generated by the vibration of the display panel 100 may be improved. In addition, in the case of a large display device, the vibration device 200 can vibrate the entire large (or large-area) display panel 100, thereby further improving the sense of sound positioning due to the vibration of the display panel 100 and achieving a stereophonic effect.

[0269] The vibration device 200 according to the embodiment of the present specification is disposed on the rear surface of the display panel 100 and can sufficiently vibrate the display panel 100 in the up-down (or front-back) direction, so that a desired sound can be output to the front (FD) of the display device. In addition, by configuring the vibration device 200 with an organic material part and an inorganic material part, the area (or size) of the vibration device 200 can be infinitely expanded, and thus the panel coverage of the vibration device 200 of the display panel 100 can be increased, so that the acoustic characteristics due to the vibration of the display panel 100 can be improved. In addition, by configuring the vibration device 200 in the form of a film that can be slimmed down, an increase in the driving voltage can be reduced or prevented. For example, the vibration device 200 can be configured to have a wide area equivalent to the size of the display panel 100, so that the sound pressure characteristics in the low frequency range, which were a drawback of a film-type piezoelectric body, for example, a piezoelectric body with a multi-layer structure in which a single piezoelectric body is laminated in multiple layers, can be improved, and the driving voltage can be reduced. In addition, since the vibration device 200 according to the embodiments of the present specification can be realized as a thin film including an inorganic material part and an organic material part, it can be integrated or attached to the display device without interfering with other components and / or mechanisms that constitute the display device.

[0270] Therefore, the display device according to the embodiment of the present specification can output the sound generated by the vibration of the display panel 100 due to the vibration of the vibration device 200 to the front (FD) of the display panel 100. Since most of the area of ​​the display panel 100 can be vibrated by the large-area vibration device in a film state, the sound pressure characteristics and the sense of position of the sound caused by the vibration of the display panel 100 can be further improved.

[0271] Fig. 27 is another cross-sectional view taken along line VII-VII' shown in Fig. 25, which is obtained by modifying the vibration device in the display device shown in Fig. 26. Therefore, in the following, redundant descriptions of the remaining configurations except for the vibration device and the configurations related thereto will be omitted or simplified.

[0272] Combining FIG. 27 with FIG. 25, in a display device according to another embodiment of the present specification, the rear surface (or back surface) of the display panel 100 can be divided into a first region (or first rear region) (A1) and a second region (or second rear region) (A2). For example, on the rear surface of the display panel 100, the first region (A1) can be the left rear region, and the second region (A2) can be the right rear region. The first and second regions (A1, A2) can be symmetrical about the middle line (CL) of the display panel 100 based on the first direction (X direction), but are not necessarily limited thereto. For example, each of the first and second regions (A1, A2) can overlap with the display region of the display panel.

[0273] The vibration device 200 according to the embodiment of the present specification may include a first vibration device 200-1 and a second vibration device 200-2 disposed on the rear surface of the display panel 100.

[0274] The first vibrating device 200-1 may be disposed in a first region (A1) of the display panel 100. For example, the first vibrating device 200-1 may be disposed so as to be biased toward a center or an end in the first region (A1) of the display panel 100 based on a first direction (X direction). The first vibrating device 200-1 according to the embodiment of the present specification may directly vibrate the first region (A1) of the display panel 100 to generate a vibration sound of the first panel or a first haptic feedback in the first region (A1) of the display panel 100. For example, the vibration sound of the first panel may be a left sound. The size of the first vibrating device 200-1 according to the embodiment of the present specification may be less than half the size of the first region (A1) or more than half the size of the first region (A1) depending on the vibration sound characteristics of the first panel or the sound characteristics required for the display device.

[0275] The second vibrating device 200-2 may be disposed in the second region (A2) of the display panel 100. For example, the second vibrating device 200-2 may be disposed so as to be biased toward the center or the edge of the second region (A2) of the display panel 100 based on the first direction (X direction). The second vibrating device 200-2 according to the embodiment of the present specification may directly vibrate the second region (A2) of the display panel 100 to generate vibration sound of the second panel or generate second haptic feedback in the second region (A2) of the display panel 100. For example, the vibration sound of the second panel may be a right-side sound. The size of the second vibrating device 200-2 according to the embodiment of the present specification may be less than half the size of the second region (A2) or more than half the size of the second region (A2) depending on the vibration sound characteristics of the second panel and the sound characteristics required for the display device. In addition, the first and second vibration devices 200-1, 200-2 may have the same size or different sizes depending on the left and right acoustic characteristics of the display device and / or the stereo acoustic characteristics of the display device, and may be arranged in a symmetrical or asymmetrical structure around the midline (CL) of the display panel 100.

[0276] Each of the first vibration device 200-1 and the second vibration device 200-2 includes one or more of the vibration devices 200 described with reference to FIGS. 15 to 24, and therefore a duplicated description thereof will be omitted.

[0277] The piezoelectric layer of the vibration structure included in the first vibrating device 200-1 and the piezoelectric layer of the vibration structure included in the second vibrating device 200-2 may be the same as or different from each other. For example, depending on the acoustic characteristics required for the display device, the piezoelectric layers of the first vibrating device 200-1 and the second vibrating device 200-2 may include the same piezoelectric layer 211 as any one of the piezoelectric layers 211 described in Figures 18A to 18G, or may include different piezoelectric layers 211.

[0278] Each of the first vibrating array 210-1 and the second vibrating array 210-2 can be adhered to the rear surface of the display panel 100 via an adhesive member 150.

[0279] The adhesive member 150 according to the embodiment of the present specification may be disposed between each of the first vibrating device 200-1 and the second vibrating device 200-2 and the rear surface of the display panel 100. The adhesive member 150 is substantially the same as the adhesive member 150 described in Figs. 25 and 26, and therefore a duplicated description thereof will be omitted.

[0280] Therefore, the display device according to another embodiment of the present specification can provide stereo sound to a user by outputting left and right sounds to the front (FD) of the display panel 100 via the first vibrating device 200-1 and the second vibrating device 200-2.

[0281] Fig. 28 is a diagram showing a display device according to another embodiment of the present specification, which is configured by adding a partition to the display device shown in Fig. 27. Therefore, in the following, redundant descriptions of the remaining configurations except for the partitions and the configurations related thereto will be omitted or simplified.

[0282] Combining FIG. 28 with FIG. 27, a display device according to another embodiment of the present specification may further include a partition 600 that spatially divides the first and second areas (A1, A2) of the display panel 100.

[0283] The partition 600 may be an air gap or a space in which sound is generated when the display panel 100 is vibrated by the first and second vibrating devices 200-1 and 200-2. For example, the partition 600 may separate sounds or separate channels, and may prevent or reduce deterioration of sound characteristics due to sound interference.

[0284] The partition 600 can be disposed between the display panel 100 and the support member 300. For example, the partition 600 can be disposed between the rear surface of the display panel 100 and the front surface of the support member 300. In order to reduce the effect of the partition 600 on the image quality of the display panel 100, the partition can be disposed on the support member 300.

[0285] The partition 600 may be expressed as a sound blocking member, a sound separating member, a space separating member, an enclosure, a baffle, or the like, but is not limited thereto.

[0286] A partition 600 according to embodiments herein can include first and second partition members 610, 620 disposed between the first and second vibration devices 200-1, 200-2.

[0287] The first and second partition members 610 and 620 may be disposed between the display panel 100 and the support member 300 corresponding to a middle region of the display panel 100. The first and second partition members 610 and 620 may separate the vibration sound of the first panel generated by the first vibrating device 200-1 from the vibration sound of the second panel generated by the second vibrating device 200-2. For example, the first and second partition members 610 and 620 may block the transmission of vibration generated in the first region (A1) of the display panel 100 by the first vibrating device 200-1 to the second region (A2) of the display panel 100, or block the transmission of vibration generated in the second region (A2) of the display panel 100 by the second vibrating device 200-2 to the first region (A1) of the display panel 100. As a result, the first and second partition members 610, 620 can attenuate or absorb vibrations of the display panel 100 at the center of the display panel 100, thereby blocking transmission of sound in the first area (A1) to the second area (A2) and blocking transmission of sound in the second area (A2) to the first area (A1). Therefore, the first and second partition members 610, 620 can further improve the sound output characteristics of the display device by separating left and right sounds, and thus the display device according to the embodiment of the present specification can output two-channel stereo sound to the front (FD) of the display panel 100 by separating left and right sounds by the first and second partition members 610, 620.

[0288] As an example, the partition 600 may be made of a material having elasticity that can be compressed to a certain degree, but is not limited thereto. For example, the partition 600 may be made of a polyurethane or polyolefin material, but is not limited thereto. As another example, the partition 600 may be made of a single-sided tape, a single-sided foam tape, a double-sided tape, or a double-sided foam tape.

[0289] As another embodiment, any one of the first and second partition members 610, 620 may be omitted. For example, only one of the first and second partition members 610, 620 may be configured. In this case, the left and right sounds can be separated by disposing any one of the first and second partition members 610, 620 between the first vibrating device 200-1 and the second vibrating device 200-2. For example, when the second partition member 620 of the first and second partition members 610, 620 is omitted, the first partition member 610 can be disposed between the display panel 100 and the support member 300 so as to correspond to the rear center line (CL) of the display panel 100.

[0290] Therefore, by separating left and right sounds using the first and / or second partition members 610, 620, the acoustic output characteristics of the display device can be further improved, and a display device including the first partition member 610 and / or the second partition member 620 can output stereo sound in two-channel mode to the front of the display panel 100 by separating left and right sounds using the first partition member 610 and / or the second partition member 620.

[0291] The partition 600 according to the embodiment of the present disclosure may further include a third partition member 630 disposed between the display panel 100 and the support member 300 .

[0292] The third partition member 630 may be disposed along between the rear end (or rear end) of the display panel 100 and the front end (or front end) of the support member 300 so as to surround the entire first vibrating device 200-1 and the second vibrating device 200-2. The third partition member 630 may be expressed as an edge partition, a sound blocking member, an edge enclosure, an edge baffle, or the like, but is not limited thereto. As an example, the third partition member 630 may be disposed adjacent to or in contact with the panel connecting member 400 shown in FIG. 26 and may be surrounded by the panel connecting member 400. As another example, the third partition member 630 may be realized as one body together with the panel connecting member 400.

[0293] The third partition member 630, together with the first and second partition members 610 and 620, can provide first to third air gaps (AG1, AG2, AG3) between the display panel 100 and the support member 300. For example, each of the first to third air gaps (AG1, AG2, AG3) can be expressed as, but is not limited to, a vibration space, a sound pressure space, a sound body, a sounding part, a resonating tube, or a resonating part.

[0294] The first air gap (AG1) may be provided in a first area (A1) of the display panel 100 surrounded by the first partition member 610 and the third partition member 630.

[0295] The second air gap (AG2) may be provided in a second area (A2) of the display panel 100 surrounded by the second partition member 620 and the third partition member 630.

[0296] The third air gap (AG3) may be provided in a middle region of the rear surface of the display panel 100 surrounded by the first and second partition members 610 and 620 and the third partition member 630. For example, the third air gap (AG3) may be provided between the first air gap (AG1) and the second air gap (AG2) including the rear surface middle line (CL) of the display panel 100. The third air gap (AG3) may be expressed as a sound separation space, a sound shielding space, a sound interference prevention space, or the like, but is not limited thereto. The third air gap (AG2) spatially separates the first air gap (AG1) and the second air gap (AG2) to prevent a resonance phenomenon or an interference phenomenon in a certain frequency band occurring in each of the first air gap (AG1) and the second air gap (AG2).

[0297] The first vibration device 200-1 may be surrounded by the third partition member 630 and the first partition member 610, which define a first air gap (AG1). The second vibration device 200-2 may be surrounded by the third partition member 630 and the first partition member 610, which define a second air gap (AG2).

[0298] If either one of the first and second partition members 610, 620 is omitted, the third air gap (AG3) may be omitted.

[0299] Therefore, the third partition member 630 surrounds the space between the display panel 100 and the support member 300, and also surrounds the first and second vibrating devices 200-1 and 200-2 together with the first and second partition members 610 and 630, respectively, thereby securing vibration spaces for the first and second vibrating devices 200-1 and 200-2, and increasing the sound pressure characteristics of the left and right sounds. Therefore, it is possible to block outflow of sound or sound pressure to the outside through the side between the display panel 100 and the support member 300, thereby further improving the sound output characteristics of the display device.

[0300] The partition 600 according to embodiments of the present disclosure may further include a fourth partition member 640 (or a first enclosure) surrounding the first vibrating device 200-1, and a fifth partition member 650 (or a second enclosure) surrounding the second vibrating device 200-2.

[0301] The fourth partition member 640 may be disposed between the display panel 100 and the support member 300 to correspond to the first air gap AG1, and may independently surround the first vibrating device 200-1. The fourth partition member 640 according to the embodiment of the present specification may have a square shape surrounding the first vibrating device 200-1, but is not limited thereto. For example, the fourth partition member 640 may have a shape that is the same as or different from the overall shape of the first vibrating device 200-1. For example, when the first vibrating device 200-1 has a square shape, the fourth partition member 640 may also have a square shape having a relatively larger size than the first vibrating device 200-1, or a circular shape or an elliptical shape.

[0302] The fourth partition member 640 can limit (or define) the vibration region (or vibration area) of the display panel 100 by the first vibrating device 200-1. For example, in the first region (A1) of the display panel 100, as the size of the fourth partition member 640 increases, the vibration region of the first region (A1) increases, and the low-frequency range characteristics of the left sound can be improved. As another example, in the first region (A1) of the display panel 100, as the size of the fourth partition member 640 decreases, the vibration region of the first region (A1) decreases, and the high-frequency range characteristics of the left sound can be improved. Therefore, the size of the fourth partition member 640 can be set according to the characteristics of the sound range required by the vibration of the display panel 100.

[0303] The fifth partition member 650 is disposed between the display panel 100 and the support member 300 to correspond to the second air gap AG2, and may independently surround the second vibration device 200-2. The fifth partition member 650 according to the embodiment of the present specification may have the same shape as the fourth partition member 640 and may have a symmetrical structure with respect to the center line (CL) on the rear surface of the display panel 100 for symmetry between the left and right sides of the acoustic elements, and therefore a description thereof will be omitted.

[0304] The fifth partition member 650 can limit (or define) the vibration region (or vibration area) of the display panel 100 by the second vibrating device 200-2. For example, in the second region (A2) of the display panel 100, as the size of the fifth partition member 650 increases, the vibration region of the second region (A2) increases, and the characteristics of the low-frequency range of sound on the right side can be improved. As another example, in the second region (A2) of the display panel 100, as the size of the fifth partition member 650 decreases, the vibration region of the second region (A2) decreases, and the characteristics of the high-frequency range of sound on the right side can be improved. Therefore, the size of the fifth partition member 650 can be set according to the characteristics of the frequency range required by the vibration of the display panel 100.

[0305] The fourth and fifth partition members 640, 650 limit the vibration regions (or vibration areas) of the first and second vibrating devices 200-1, 200-2, thereby improving the symmetry of the left and right sounds generated by the vibration of the display panel 100, and optimizing the sound pressure characteristics and the reproduction sound range band of each of the left and right sounds. As another embodiment, when the fourth and fifth partition members 640, 650 are arranged, the third partition member 630 can be omitted. As another embodiment, when the fourth and fifth partition members 640, 650 are arranged, any one or more of the first partition member 610, the second partition member 620, and the third partition member 630 can be omitted.

[0306] Therefore, the display device according to the embodiment of the present specification may optimize the sound pressure characteristics and the reproduction sound range band of the left and right sounds by including the partition 600. As an example, the display device according to the embodiment of the present specification may include at least one of the first and second partition members 610 and 620. As another example, the display device according to the embodiment of the present specification may include at least one of the first and second partition members 610 and 620 and the third partition member 630. As another example, the display device according to the embodiment of the present specification may include the third to fifth partition members 630, 640, and 650. As another example, the display device according to the embodiment of the present specification may include all of the first to fifth partition members 610, 620, 630, 640, and 650.

[0307] Therefore, the display device according to another embodiment of the present specification can provide stereo sound to a user by outputting left and right sounds to the front (FD) of the display panel 100 via the first and second vibration devices 200-1, 200-2, and can output two-channel stereo sound to the front (FD) of the display panel 100 by separating the left and right sounds using the partition 600.

[0308] In addition, in the display device according to another embodiment of the present specification, at least one of the first and second protective members 250, 270 of the first and second vibrating devices 200-1, 200-2, respectively, is made of a metal film or metal plate made of a metal material, so that the flatness of the sound pressure characteristics can be improved by reducing the resonant frequency due to the protective members 250, 270 made of a metal material.

[0309] Fig. 29 is a diagram showing a display device according to another embodiment of the present specification, which is a modified vibration device of the display device shown in Fig. 28. Therefore, in the following, redundant descriptions of the remaining configurations except for the vibration device and its related configurations will be omitted or simplified.

[0310] 29, in a display device according to another embodiment of the present specification, the vibration device 200 may include first to fourth vibration devices 200-1, 200-2, 200-3, and 200-4 arranged on the rear surface of the display panel 100.

[0311] The first and third vibrating devices 200-1, 200-3 can be arranged alternately or diagonally in the first region (A1) of the display panel 100 to increase the vibration area for the first region (A1) of the display panel 100. For example, the diagonal direction can be a direction between the first direction (X direction) and the second direction (Y direction). The first and third vibrating devices 200-1, 200-3 can be surrounded by a partition 600. For example, the first and third vibrating devices 200-1, 200-3 can be surrounded by a fourth partition member 640 (or a first enclosure).

[0312] Each of the first and third vibrating devices 200-1 and 200-3 can vibrate the first region (A1) of the display panel 100 to generate the vibration sound of the first panel (or the left side sound) or the first haptic feedback in the first region (A1) of the display panel 100. For example, the vibration area of ​​the first region (A1) of the display panel 100 is increased by the diagonal arrangement structure of the first and third vibrating devices 200-1 and 200-3, thereby improving the low frequency band characteristics of the left side sound. For example, by further arranging the third vibrating device 200-3 in the first region (A1) of the display panel 100 in addition to the first vibrating device 200-1, the vibration sound or the first haptic feedback of the first panel according to the embodiment of the present specification can be further improved than the vibration sound or the first haptic feedback of the first panel described in FIG. 28.

[0313] According to an embodiment of the present specification, the first vibrating device 200-1 may be arranged to be biased toward an edge in the first region (A1) of the display panel 100. For example, the first vibrating device 200-1 may be arranged in an upper left region adjacent to an edge of the display panel 100 in the first region (A1) of the display panel 100. The third vibrating device 200-3 may be arranged to be biased toward a center line (CL) of the display panel 100 in the first region (A1) of the display panel 100. For example, the third vibrating device 200-3 may be arranged in a lower right region adjacent to the center line (CL) of the display panel 100 in the first region (A1) of the display panel 100. The third vibrating device 200-3 may not overlap with the first vibrating device 200-1 in the first direction (X direction) and the second direction (Y direction) by being arranged alternately with the first vibrating device 200-1 in the first region (A1) of the display panel 100.

[0314] The first and third vibrating devices 200-1, 200-3 may be arranged side by side along the first direction (X direction) or the second direction (Y direction) in the first region (A1) of the display panel 100. Therefore, the vibration area of ​​the first region (A1) of the display panel 100 can be increased by the parallel arrangement structure of the first and third vibrating devices 200-1, 200-3, thereby improving the bass band characteristics of the left side sound. Compared with the parallel arrangement structure of the first and third vibrating devices 200-1, 200-3, the diagonal arrangement structure of the first and third vibrating devices 200-1, 200-3 can further increase the vibration area of ​​the first region (A1) of the display panel 100, thereby further improving the bass band characteristics of the left side sound. The diagonal arrangement structure of the first and third vibrating devices 200-1, 200-3 has the effect of arranging the vibrating devices in a 2×2 structure within the first region (A1) of the display panel 100, thereby reducing the number of vibrating devices that vibrate the first region (A1) of the display panel 100 by half.

[0315] According to the embodiment of the present specification, the piezoelectric layer of the vibrating structure 210 included in the first vibrating device 200-1 and the piezoelectric layer of the vibrating structure 210 included in the third vibrating device 200-3 may be the same as or different from each other. For example, depending on the acoustic characteristics required for the display device, the piezoelectric layers of the first vibrating device 200-1 and the third vibrating device 200-3 may include one or more piezoelectric layers 211 that are the same as any one or more of the piezoelectric layers 211 described in Figures 18A to 18G, or may include different piezoelectric layers 211.

[0316] The second and fourth vibrating devices 200-2, 200-4 can be arranged alternately or diagonally in the second region (A2) of the display panel 100 to increase the vibration area of ​​the second region (A2) of the display panel 100. The second and fourth vibrating devices 200-2, 200-4 can be surrounded by a partition 600. For example, the second and fourth vibrating devices 200-2, 200-4 can be surrounded by a fifth partition member 650 (or a second enclosure).

[0317] Each of the second and fourth vibrating devices 200-2, 200-4 can vibrate the second region (A2) of the display panel 100 to generate the vibration sound of the second panel (or the right side sound) or generate the second haptic feedback in the second region (A2) of the display panel 100. For example, the vibration area of ​​the second region (A2) of the display panel 100 is increased by the diagonal arrangement structure of the second and fourth vibrating devices 200-2, 200-4, thereby improving the characteristics of the low frequency band of the right side sound. For example, by arranging the fourth vibrating device 200-4 in the second region (A2) of the display panel 100 in addition to the second vibrating device 200-2, the vibration sound or the second haptic feedback of the second panel according to the embodiment of the present specification can be further improved than the vibration sound or the second haptic feedback of the second panel described in FIG. 28.

[0318] The second vibration device 200-2 may be arranged so as to be biased toward an edge in the second region (A2) of the display panel 100. For example, the second vibration device 200-2 may be arranged in an upper right region adjacent to an edge of the display panel 100 in the second region (A2) of the display panel 100. The first vibration device 200-1 and the second vibration device 200-2 may be symmetrical with respect to the center line (CL) of the display panel 100. The fourth vibration device 200-4 may be arranged so as to be biased toward the center line (CL) of the display panel 100 in the second region (A2) of the display panel 100. For example, the fourth vibration device 200-4 may be arranged in a lower left region adjacent to the center line (CL) of the display panel 100 in the second region (A2) of the display panel 100. The fourth vibrating device 200-4 may not overlap with the second vibrating device 200-2 in the first direction (X direction) and the second direction (Y direction) by being arranged alternately with the second vibrating device 200-2 in the second area (A2) of the display panel 100. The fourth vibrating device 200-4 may be arranged in a symmetrical structure with the third vibrating device 200-3 with respect to the center line (CL) of the display panel 100.

[0319] The second and fourth vibration devices 200-2, 200-4 may be arranged side by side along the first direction (X direction) or the second direction (Y direction) in the second region (A2) of the display panel 100. Therefore, the vibration area of ​​the second region (A2) of the display panel 100 can be increased by the parallel arrangement structure of the second and fourth vibration devices 200-2, 200-4, thereby improving the bass band characteristics of the right side sound. Compared with the parallel arrangement structure of the second and fourth vibration devices 200-2, 200-4, the diagonal arrangement structure of the second and fourth vibration devices 200-2, 200-4 can further increase the vibration area of ​​the second region (A2) of the display panel 100, thereby further improving the bass band characteristics of the right side sound. The diagonal arrangement structure of the second and fourth vibrating devices 200-2, 200-4 has the effect of arranging the vibrating devices in a 2x2 structure within the second region (A2) of the display panel 100, thereby reducing the number of vibrating devices that vibrate the second region (A2) of the display panel 100 by half.

[0320] According to the embodiment of the present specification, the piezoelectric layer of the vibration structure included in the second vibrating device 200-2 and the piezoelectric layer of the vibration structure included in the fourth vibrating device 200-4 may be the same as or different from each other. For example, depending on the acoustic characteristics required for the display device, the piezoelectric layers of the second vibrating device 200-2 and the fourth vibrating device 200-4 may include one or more piezoelectric layers 211 that are the same as any one or more of the piezoelectric layers 211 described in Figures 18A to 18G, or may include different piezoelectric layers 211.

[0321] The piezoelectric layers of the vibration structures included in each of the first to fourth vibrating devices 200-1, 200-2, 200-3, and 200-4 may be the same or different from each other. For example, depending on the acoustic characteristics required for the display device, the piezoelectric layers of each of the first to fourth vibrating devices 200-1, 200-2, 200-3, and 200-4 may include one or more piezoelectric layers 211 that are the same as the piezoelectric layers 211 described in Figures 18A to 18G, or may include different piezoelectric layers 211.

[0322] When the piezoelectric layers of the first to fourth vibration devices 200-1, 200-2, 200-3, and 200-4 each include a different piezoelectric layer 211 among the piezoelectric layers 211 described in Fig. 18A to Fig. 18G, the vibration device 200 can have various resonance frequencies. This makes it possible to significantly increase the reproduction band of sound generated in conjunction with the vibration of the vibration device 200 and the sound pressure characteristics of the sound.

[0323] The arrangement of the first to fourth vibration devices 200-1, 200-2, 200-3, and 200-4 is not limited to the arrangement shown in Fig. 29. For example, in each of the first region (A1) and the second region (A2) of the display panel 100, when the direction between the upper left side and the lower right side is the first diagonal direction and the direction between the upper right side and the lower left side is the second diagonal direction, the first and third vibration devices 200-1 and 200-3 can be arranged along the first diagonal direction or the second diagonal direction, and the second and fourth vibration devices 200-2 and 200-4 can be arranged along a diagonal direction that is the same as or different from the diagonal arrangement direction of the first and third vibration devices 200-1 and 200-3, among the first and second diagonal directions. For example, the first vibrating device 200-1 and the second vibrating device 200-2 can be arranged symmetrically or asymmetrically about the center line (CL) of the display panel 100. The third vibrating device 200-3 and the fourth vibrating device 200-4 can be arranged symmetrically or asymmetrically about the center line (CL) of the display panel 100.

[0324] Therefore, the display device according to the other embodiments of the present specification may have the same effect as the display device described in Fig. 28. For example, the vibration device according to the other embodiments of the present specification may provide a user with stereo sound by outputting left and right sounds to the front (FD) of the display panel 100 via the first to fourth vibration devices 200-1, 200-2, 200-3, and 200-4, and may output two-channel stereo sound to the front (FD) of the display panel 100 by separating the left and right sounds by the partition 600.

[0325] In addition, in the display device according to other embodiments of the present specification, at least one of the first and second protective members 250, 270 of each of the first to fourth vibrating devices 200-1, 200-2, 200-3, 200-4 is made of a metal film or a metal plate made of a metal material, and therefore the flatness of the sound pressure characteristics can be improved by reducing the resonance frequency due to the protective members 250, 270 made of a metal material.

[0326] In the display device according to another embodiment of the present specification, the vibration area of ​​each of the first and second regions (A1, A2) is increased due to the diagonal arrangement structure of the first and third vibrating devices 200-1, 200-3 and the diagonal arrangement structure of the second and fourth vibrating devices 200-2, 200-4, thereby further increasing the sound pressure characteristics in the low frequency range.

[0327] 30A to 30C are diagrams showing a display device including a vibration device according to an embodiment of the present specification, which shows a display device to which the vibration device described in FIGS. 15 to 24 is applied.

[0328] The vibration device described with reference to Figs. 15 to 24 can be realized in the form of a flexible film, and thus can be applied to a variety of application devices.

[0329] Referring to FIG. 30A, the vibration device 200 according to the embodiment of the present specification can be applied to a flexible display device or a commercial display apparatus having a display panel 100 including a plurality of concave or convex curved portions (CSP1 to CSP5). As an example, the vibration device 200 can be bent into a shape having a curvature value (or a curvature radius) that matches the convex or concave portions of each curved portion (CSP1 to CSP5) of the display panel 100, and disposed on the convex or concave portions of each curved portion (CSP1 to CSP5) of the display panel 100. As another example, the vibration device 200 can be disposed on the entire back surface of the display panel 100, with the shape matching the curvature value (or the curvature radius) of each curved portion (CSP1 to CSP5) of the display panel 100.

[0330] Referring to FIG. 30B, the vibration device 200 according to the embodiment of the present specification can be applied to a rollable display device having a display panel 100 that is wound or unwound in a spiral shape. As an example, the vibration device 200 can be realized in a shape that has a curvature value (or a curvature radius) of the display panel 100 that is wound or unwound in a spiral shape. For example, the vibration device 200 can be arranged at regular intervals on the rear surface of the display panel 100. As another example, the vibration device 200 can be realized in a shape that matches the curvature value (or a curvature radius) of the display panel 100 that is wound or unwound in a spiral shape and arranged on the entire rear surface of the display panel 100.

[0331] Referring to FIG. 30C, a vibration device 200 according to another embodiment of the present specification can be applied to a wearable display device having a display panel 100 bent into a "C" shape that is wrapped around a user's wrist. As an example, the vibration device 200 can be realized in a shape having a curvature value (or a curvature radius) of the display panel 100 bent into a "C" shape. For example, the vibration device 200 can be arranged at regular intervals on the back surface of the display panel 100. As another example, the vibration device 200 can be realized in a shape that matches the curvature value (or a curvature radius) of the display panel 100 bent into a "C" shape and arranged over the entire back surface of the display panel 100.

[0332] The vibration device according to the embodiment of the present specification may be applied to a vibration device disposed in a display device. The display device according to the embodiment of the present specification may be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable apparatus, a foldable apparatus, a rollable apparatus, a bendable apparatus, a flexible apparatus, a curved apparatus, an electronic organizer, an electronic book, a portable multimedia player (PMP), a personal digital assistant (PDA), an MP3 player, a mobile medical device, a desktop PC, a laptop PC, a netbook computer, a workstation, a navigation system, a vehicle navigation system, a vehicle display device, a theater device, a theater display device, a television, a wallpaper device, a signage device, a game device, a notebook computer, a monitor, a camera, a video camera, and a home appliance. In addition, the vibration device according to the embodiment of the present specification may be applied to an organic light emitting lighting device or an inorganic light emitting lighting device. When the vibration device is applied to a lighting device, it may function as a light and a speaker. When the display device according to the present specification is applied to a mobile device, it may function as one or more of a speaker, a receiver, and a haptic, but is not limited thereto.

[0333] A flexible cable according to an embodiment of the present disclosure can be described as follows.

[0334] A flexible cable according to some embodiments of the present specification includes a base member having a terminal portion, a conductive layer having a plurality of conductive lines disposed on the base member, and a protective layer disposed on the base member, covering the conductive layer and exposing one side of each of the plurality of conductive lines from the terminal portion, and the length of each of the plurality of conductive lines may be longer than the length of the base member.

[0335] According to some embodiments herein, each of the plurality of conductive lines can protrude outwardly through a side surface of the base member.

[0336] According to some embodiments herein, a protruding length of each of the plurality of conductive lines may be greater than a length of the terminal portion.

[0337] According to some embodiments herein, each of the plurality of conductive lines can include a first line disposed on the base member and a second line extending outwardly from a side surface of the base member.

[0338] According to some embodiments herein, the conductive substrate may further include a support disposed on a second line of each of the plurality of conductive lines, the support covering a portion of the second line.

[0339] According to some embodiments herein, each second line of the plurality of conductive lines may include a plurality of straps spaced apart from one another, and the support may commonly surround the plurality of straps.

[0340] According to some embodiments of the present disclosure, the conductive line may further include a first line support that supports a portion of the second lines of each of the plurality of conductive lines, and a second line support that supports the remaining second lines of each of the plurality of conductive lines.

[0341] According to some embodiments of the present specification, the first line support portion can extend from the base member to support the back of a portion of the second line, and the second line support portion can wrap around the front and sides of the remaining second line.

[0342] According to some embodiments of the present disclosure, each of the plurality of conductive lines may include a first line disposed on the base member parallel to a first direction, a second line extending from the first line to an outside of the base member along the first direction, and a third line protruding from the second line parallel to a second direction intersecting the first direction.

[0343] A vibration device according to an embodiment of the present disclosure can be described as follows.

[0344] A vibration device according to some embodiments of the present specification may include a vibration structure including a vibration layer, a first electrode layer disposed on a first surface of the vibration layer, and a second electrode layer disposed on a second surface opposite the first surface of the vibration layer, and a flexible cable electrically connected to each of the first electrode layer and the second electrode layer of the vibration structure.

[0345] According to some embodiments of the present disclosure, the flexible cable may include a plurality of conductive lines electrically connected to each of the first and second electrode layers of the vibrating structure, and some of the plurality of conductive lines may be electrically connected to the first electrode layer of the vibrating structure and the remainder of the plurality of conductive lines may be electrically connected to the second electrode layer of the vibrating structure.

[0346] According to some embodiments of the present specification, the flexible cable includes a body portion having a terminal portion and a plurality of finger lines protruding from the body portion, some of the plurality of finger lines being electrically connected to a first electrode layer of the vibrating structure and the remainder of the plurality of finger lines being electrically connected to a second electrode layer of the vibrating structure.

[0347] According to some embodiments of the present disclosure, a protruding length of each of the multiple finger lines may be longer than a length of the terminal portion.

[0348] According to some embodiments of the present specification, a flexible cable includes a base member having a terminal portion, a conductive layer disposed on the base member and having a plurality of conductive lines extending to the outside through a side of the base member, and a protective layer disposed on the base member and covering the conductive layer to expose one side of each of the plurality of conductive lines from the terminal portion, some of the plurality of conductive lines being electrically connected to a first electrode layer of the vibrating structure, and the remainder of the plurality of conductive lines being electrically connected to a second electrode layer of the vibrating structure.

[0349] According to some embodiments herein, the extension length of each of the plurality of conductive lines may be greater than the length of the terminal portion.

[0350] According to some embodiments of the present specification, each of the plurality of conductive lines includes a first line arranged on the base member parallel to a first direction, and a second line extending from the first line to an outer side of the base member along the first direction, and some of the second lines of each of the plurality of conductive lines may be electrically connected to a first electrode layer of the vibrating structure, and the remaining second lines of each of the plurality of conductive lines may be electrically connected to a second electrode layer of the vibrating structure.

[0351] According to some embodiments herein, the flexible cable may further include a support disposed on a second line of each of the plurality of conductive lines, the support being capable of covering a portion of the second line.

[0352] According to some embodiments of the present disclosure, the flexible cable may include a plurality of straps, each of the second lines of the plurality of conductive lines being spaced apart from one another, and the support may commonly surround the plurality of straps.

[0353] According to some embodiments of the present disclosure, the flexible cable may further include a first line support portion supporting a portion of the second lines of each of the plurality of conductive lines, and a second line support portion supporting the remaining second lines of each of the plurality of conductive lines.

[0354] According to some embodiments herein, the first line support portion extends from the base member to support the back of a portion of the second line, and the second line support portion can wrap around one or more of the front and sides of the remaining second line.

[0355] According to some embodiments of the present specification, each of the plurality of conductive lines may further include at least one third line protruding from the second line parallel to a second direction intersecting the first direction, and the at least one third line protruding from a portion of the second lines of each of the plurality of conductive lines may be electrically connected to a first electrode layer of the vibrating structure, and the at least one third line protruding from the remaining second lines of each of the plurality of conductive lines may be electrically connected to a second electrode layer of the vibrating structure.

[0356] According to some embodiments of the present specification, the vibration structure includes a plurality of vibration modules spaced apart from each other along a first direction and a second direction intersecting the first direction, each of the plurality of vibration modules includes a vibration layer, a first electrode layer, and a second electrode layer, and the flexible cable can be electrically connected to the first electrode layer and the second electrode layer of each of the plurality of vibration modules.

[0357] According to some embodiments of the present specification, the flexible cable includes a body portion having a terminal portion, and a plurality of finger lines protruding from the body portion, some of the plurality of finger lines being electrically connected to the first electrode layers and the second electrode layers of a portion of the plurality of vibration modules, and the remainder of the plurality of finger lines being electrically connected to the first electrode layers and the second electrode layers of the vibration modules of the remaining portion of the plurality of vibration modules.

[0358] According to some embodiments of the present specification, the vibration structure includes a first and a second vibration module spaced apart from each other along a first direction, and a third and a fourth vibration module spaced apart from each of the first and the second vibration modules along a second direction intersecting the first direction and spaced apart from each other along the first direction, each of the first to fourth vibration modules includes a vibration layer, a first electrode layer, and a second electrode layer, and the flexible cable can be electrically connected to the first electrode layer and the second electrode layer of each of the first to fourth vibration modules. According to some embodiments of the present specification, the first and the second vibration modules can be arranged to have a separation distance of 0.1 mm or more and less than 3 cm. According to some embodiments of the present specification, the first and the second vibration modules can be arranged to have a separation distance of 0.1 mm or more and less than 5 mm.

[0359] According to some embodiments of the present specification, the flexible cable may include a first finger line arranged along the second direction and electrically connected to a first electrode layer of each of the first and third vibration modules, a second finger line arranged along the second direction and electrically connected to a second electrode layer of each of the first and third vibration modules, a 3-1 line portion extending from each of the first finger line and the second finger line along the first direction and electrically connected to the first electrode layer and the second electrode layer of each of the first and second vibration modules, and a 3-2 line portion extending from each of the first finger line and the second finger line along the first direction and electrically connected to the first electrode layer and the second electrode layer of each of the third and fourth vibration modules.

[0360] A vibration device according to some embodiments of the present specification may include a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, a first protective member arranged on the first surface of the vibration structure; a second protective member arranged on the second surface of the vibrating structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibrating structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibrating structure and the second protective member.

[0361] According to some embodiments of the present specification, the flexible cable may further include a body portion having a terminal portion, and each of the at least one first finger line and the at least one second finger line may protrude from the body portion to have a length longer than a length of the terminal portion.

[0362] According to some embodiments of the present specification, the vibration structure may further include a first adhesive layer disposed between the first electrode layer of the vibration structure and the first protective member and covering at least one first finger line, and a second adhesive layer disposed between the second electrode layer of the vibration structure and the second protective member and covering at least one second finger line.

[0363] According to some embodiments of the present disclosure, one of the first protective member and the second protective member may be made of a metal material.

[0364] According to some embodiments of the present disclosure, the vibration layer may include a plurality of inorganic material portions having piezoelectric properties, and an organic material portion between the plurality of inorganic material portions.

[0365] According to some embodiments of the present disclosure, each of the inorganic material portions has a piezoelectric deformation coefficient of 1000 pC / N or more along the thickness direction, and / or (Pb A-B C B )((Mg 1 / 3 Nb 2 / 3 ) a (Ni 1 / 3 Nb2 / 3 ) b Zr c Ti d )O3, where C is one of calcium (Ca), strontium (Sr), and barium (Ba), and a+b+c+d=1, 0.02≦B≦0.20, 0.80≦AB≦0.98, 0.05≦a≦0.25, 0.05≦b≦0.25, 0.10≦c≦0.50, 0.10≦d≦0.50.

[0366] A display device according to an embodiment of the present specification can be described as follows.

[0367] A display device according to some embodiments of the present specification includes a display panel that displays images and a vibration device arranged on the rear side of the display panel to vibrate the display panel, the vibration device including a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

[0368] A display device according to some embodiments of the present specification includes a display panel that displays images, and a vibration device arranged on the rear side of the display panel to vibrate the display panel, the vibration device including a vibration layer, a vibration structure including a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, a first protective member arranged on the first surface of the vibration structure, a second protective member arranged on the second surface of the vibration structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibration structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibration structure and the second protective member.

[0369] According to some embodiments of the present disclosure, the vibration layer may include a plurality of inorganic material portions having piezoelectric properties and an organic material portion between the plurality of inorganic material portions.

[0370] According to some embodiments of the present disclosure, each of the inorganic material portions has a piezoelectric deformation coefficient of 1000 pC / N or more along the thickness direction, and / or (Pb A-B C B )((Mg 1 / 3 Nb 2 / 3 ) a (Ni 1 / 3 Nb 2 / 3 ) b Zr c Ti d )O3, where C is one of calcium (Ca), strontium (Sr), and barium (Ba), and a+b+c+d=1, 0.02≦B≦0.20, 0.80≦AB≦0.98, 0.05≦a≦0.25, 0.05≦b≦0.25, 0.10≦c≦0.50, 0.10≦d≦0.50.

[0371] According to some embodiments of the present disclosure, each of the inorganic material portions may have one of a line shape, a circle shape, an ellipse shape, and a polygon shape.

[0372] According to some embodiments of the present specification, the display panel includes a first region and a second region overlapping with a display region that displays an image, and the vibration device includes a first vibration device arranged in the first region and a second vibration device arranged in the second region, and each of the first vibration device and the second vibration device includes a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

[0373] According to some embodiments of the present specification, the display panel includes a first region and a second region overlapping with a display region that displays an image, and the vibration device includes a first vibration device arranged in the first region and a second vibration device arranged in the second region, and each of the first vibration device and the second vibration device includes a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, a first protective member arranged on the first surface of the vibration structure, a second protective member arranged on the second surface of the vibration structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibration structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibration structure and the second protective member.

[0374] According to some embodiments of the present specification, the display device may further include a support member arranged on a rear surface of the display panel, a first enclosure arranged between the rear surface of the display panel and the support member and surrounding the first vibration device, and a second enclosure arranged between the rear surface of the display panel and the support member and surrounding the second vibration device.

[0375] According to some embodiments of the present specification, the display panel includes a first region and a second region overlapping with a display region that displays an image, and the vibration device further includes a first vibration device arranged in the first region, a second vibration device arranged in the second region, a third vibration device arranged in the first region alternating with the first vibration device, and a fourth vibration device arranged in the second region alternating with the second vibration device, and each of the first to fourth vibration devices includes a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite the first surface of the vibration layer, and a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure.

[0376] According to some embodiments of the present specification, the display panel includes a first region and a second region overlapping with a display region that displays an image, and the vibration device further includes a first vibration device arranged in the first region, a second vibration device arranged in the second region, a third vibration device arranged in the first region alternating with the first vibration device, and a fourth vibration device arranged in the second region alternating with the second vibration device, and each of the first to fourth vibration devices includes a vibration structure including a vibration layer, a first electrode layer arranged on a first surface of the vibration layer, and a second electrode layer arranged on a second surface opposite to the first surface of the vibration layer, a first protective member arranged on the first surface of the vibration structure, a second protective member arranged on the second surface of the vibration structure, and a flexible cable including at least one first finger line arranged between the first electrode layer of the vibration structure and the first protective member, and at least one second finger line arranged between the second electrode layer of the vibration structure and the second protective member.

[0377] According to some embodiments of the present specification, the display device may further include a support member arranged on a rear surface of the display panel, a first enclosure arranged between the rear surface of the display panel and the support member and surrounding the first and third vibration devices, and a second enclosure arranged between the rear surface of the display panel and the support member and surrounding the second and fourth vibration devices.

[0378] The features, structures, effects, etc. described in the various examples of this specification above are included in at least one example of this specification and are not necessarily limited to only one example. Furthermore, the features, structures, effects, etc. exemplified in at least one example of this specification can be combined or modified in different examples by a person having ordinary skill in the art to which the technical ideas of this specification belong. Therefore, the contents related to such combinations and modifications must be interpreted as being included in the technical scope or scope of rights of this specification. [Explanation of symbols]

[0379] 1: Drive body 1-1: First driving body 1-2: Second driving body 1a: Upper electrode layer 1b: Lower electrode layer 1a1: First upper electrode layer 1b1: First lower electrode layer 1a2: Second upper electrode layer 1b2: Second lower electrode layer 11: Base material 11a:Terminal section 11s: Side surface of base member 11 13: Conductive layer 13a: First line 13b: Second line 13c: 3rd line 13c1: 3rd-1st line 13c2; 3rd-2nd line 13c-1: 3rd-1st line section 13c-2: 3rd-2nd line section 13c11: 1st-1st wing line 13c12: 1st-2nd wing line 13c21: 2nd-1st wing line 13c22: 2nd-2nd wing line 13c31: 3rd-1st wing line 13c32: 3rd-2nd wing line 13c41: 4th-1st wing line 13c42: 4th-2nd wing line 13e: One side 13p: Pad section 13s: Strap 13-1, 13-2, 13-3, 13-4: Conductive lines 15:Protective layer 15a: opening 17:Support 17a: First support 17b: Second support 19: Line support part 19a: First line support part 19b: Second line support part 100: Display panel 200: Vibration device 200-1: 1st vibration device 200-2:Second vibration device 200-3: Third vibration device 200-4: 4th vibration device 210: Vibration structure 210-1: First Vibration Array 210-2: Second Vibration Array 210A, 210B, 210C, 210D: Vibration module 211: Piezoelectric layer 211a: Part 1 211b:Second part 213: First electrode layer 215: Second electrode layer 230: Flexible cable 240: 1st adhesive layer 250: First protective member 260:Second adhesive layer 270: Second protective member 300: Support member 400: Panel connection material 600: Partition

Claims

1. a vibration structure including a vibration layer, a first electrode layer disposed on a first surface of the vibration layer, and a second electrode layer disposed on a second surface of the vibration layer opposite to the first surface; a flexible cable electrically connected to the first electrode layer and the second electrode layer of the vibration structure; a first protective member on the first electrode layer; a second protective member on the second electrode layer; a first adhesive layer disposed between the first electrode layer and the first protective member; and a second adhesive layer disposed between the second electrode layer and the second protective member, The flexible cable is A body portion having a terminal portion; A base member included in the body portion; a conductor layer disposed on the base member and having a plurality of conductive lines configured to be electrically connected to the first electrode layer and the second electrode layer of the vibration structure; and a protective layer included in the body portion, the protective layer being disposed on the base member to cover at least a portion of the conductive layer and configured to expose an end portion of at least one of the plurality of conductive lines so that the end portion can be in contact with the terminal portion; Including, Each of the plurality of conductive lines comprises: a first line on the base member; and A second line extending from the first line to the outside of the body portion. Including, a length of the at least one of the plurality of conductive lines is greater than a length of the base member; At least one of the second lines is electrically connected to the first electrode layer through the first adhesive layer; At least one other of the second lines is electrically coupled to the second electrode layer within the second adhesive layer.

2. The vibrating device of claim 1 , wherein the vibrating structure is surrounded by the first adhesive layer and the second adhesive layer.

3. 2. The vibration device according to claim 1, wherein each of the plurality of conductive lines parallel to a first direction protrudes outside the body portion beyond a side surface of the base member perpendicular to the first direction, and the protruding length of each of the plurality of conductive lines is longer than the length of the terminal portion.

4. The vibration device of claim 1 , wherein the second line of each of the plurality of conductive lines includes a plurality of spaced apart straps.

5. 2. The vibration device of claim 1, wherein the flexible cable further includes a support disposed on the at least one second line of the plurality of conductive lines, the support at least partially surrounding a portion of the second line.

6. the second line of each of the plurality of conductive lines includes a plurality of spaced apart straps; The vibration device of claim 5 , wherein the support on at least one of the second lines at least partially surrounds the plurality of straps in common in the second line.

7. At least one of the plurality of conductive lines is a first line on the base member parallel to a first direction; a second line extending from the first line to an exterior of the body along the first direction; and a third line extending in a second direction intersecting the first direction and projecting from the second line; The vibration device of claim 1 , comprising:

8. The vibration device according to claim 1 , wherein the flexible cable further includes a body portion including the terminal portion, and the plurality of conductive lines form finger lines and protrude from the body portion.

9. At least one of the plurality of conductive lines parallel to a first direction further includes at least one third line extending from the second line parallel to a second direction intersecting the first direction; At least one third line protruding from some of the second lines of the plurality of conductive lines is electrically connected to the first electrode layer of the vibration structure; The vibration device according to claim 1 , wherein at least one third line protruding from another one of the second lines of the plurality of conductive lines is electrically connected to the second electrode layer of the vibration structure.

10. the vibration structure includes a plurality of vibration modules spaced apart from each other along a first direction and / or a second direction intersecting the first direction, Each of the plurality of vibration modules includes the vibration layer, the first electrode layer, and the second electrode layer, The vibration device according to claim 1 , wherein the flexible cable is electrically coupled to the first electrode layer and the second electrode layer of each of the plurality of vibration modules.

11. the first protective member is on the first electrode layer of each of the plurality of vibration modules, the second protective member is on the second electrode layer of each of the plurality of vibration modules, the first adhesive layer is disposed between the first electrode layer of each of the plurality of vibration modules and the first protective member, The vibration device according to claim 10 , wherein the second adhesive layer is disposed between the second electrode layer of each of the plurality of vibration modules and the second protective member.

12. The vibration device of claim 11 , wherein each of the plurality of vibration modules is surrounded by the first adhesive layer and the second adhesive layer.

13. the vibration structure includes a first vibration module and a second vibration module spaced apart from each other along a first direction; each of the first and second vibration modules includes the vibration layer, the first electrode layer, and the second electrode layer; The vibration device of claim 1 , wherein each of the plurality of conductive lines of the flexible cable is electrically coupled to the first electrode layer and the second electrode layer of each of the first and second vibration modules.

14. The vibration device of claim 13 , wherein the first and second vibration modules are arranged to have a separation distance of at least 0.1 mm and less than 3 cm.

15. The vibration device of claim 13 , wherein the first and second vibration modules are arranged to have a separation distance of at least 0.1 mm and less than 5 mm.

16. The vibration device of claim 13 , wherein each of the plurality of conductive lines comprises a plurality of spaced apart straps.

17. a first protective member on the first electrode layer of each of the first and second vibration modules; a second protective member on the second electrode layer of each of the first and second vibration modules; a first adhesive layer disposed between the first electrode layer and the first protective member of each of the first and second vibration modules; and a second adhesive layer disposed between the second electrode layer and the second protective member of each of the first and second vibration modules; The vibration device of claim 13 further comprising:

18. The vibration device of claim 17 , wherein each of the first and second vibration modules is surrounded by the first and second adhesive layers.

19. The vibration layer is a plurality of inorganic material portions having piezoelectric properties; and an organic material portion between the inorganic material portions; 19. The vibration device of claim 1 , comprising:

20. The vibration layer has a piezoelectric deformation coefficient of 1000 pC / N or more in a thickness direction. or (Pb Ａ－Ｂ C Ｂ ) ((Mg １／３ Nb ２／３ ) ａ (Ni １／３ Nb ２／３ ) ｂ Zr ｃ Ti ｄ ) O ３ Contains the formula: In the above formula, C is any one of calcium (Ca), strontium (Sr), and barium (Ba); a+b+c+d=1, 0.02≦B≦0.20, 0.80≦A−B≦0.98, 0.05≦a≦0.25, 0.05≦b≦0.25, 0.10≦c≦0.50, 20. The vibration device of claim 19, wherein 0.10≦d≦0.

50.

21. 1. A display device, comprising: a display panel configured to display video; and The vibration device according to claim 1 , which is disposed on a rear surface of the display panel and vibrates the display panel. A display device comprising:

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