Vibrating device and device comprising a vibrating device

Abstract

The present disclosure relates to a vibration device and a device including the vibration device. The device includes a vibration member including a pad portion, a vibration device that vibrates the vibration member, a pad connection member connected to the pad portion, and a vibration signal connection member that connects the vibration device to the pad connection member.

Description

[0001] Cross Reference to Related Applications

[0002] This application claims the benefit of Korean Patent Application No. 10-2021-0188189, filed December 27, 2021, which is incorporated by reference herein as if fully set forth in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates to a device, and more particularly, to a device in which a signal connection structure between a vibration device and a circuit board is simplified. BACKGROUND

[0004] A device includes a separate speaker or sound device for providing sound. When a speaker is provided in a device, there is a problem that the design and spatial arrangement of the device are limited due to the space occupied by the speaker.

[0005] A speaker applied to a device can be, for example, an actuator including a magnet and a coil. However, when the actuator is applied to the device, there is a disadvantage of a thick thickness. A piezoelectric device for achieving a thin thickness has attracted a lot of attention.

[0006] Due to the fragile characteristics of the piezoelectric device, the piezoelectric device is easily damaged due to external impact, causing a problem of low reliability of sound reproduction. In addition, when a speaker such as a piezoelectric device is applied to a flexible device, there is a problem that damage occurs due to the fragile characteristics.

[0007] In addition, due to the vibration signal cable unloading hole of the piezoelectric device, the stiffness and heat dissipation quality are reduced, the position of the piezoelectric device is limited, and heat is generated due to the vibration signal cable when driving the piezoelectric device.

[0008] The information disclosed in the background section of this document has been known to the inventors of the inventive concept prior to the implementation of the present disclosure, or acquired by the inventors in the course of implementing the present disclosure. Therefore, it can include information that does not constitute prior art that has been known to the public in the country. SUMMARY

[0009] Accordingly, the inventors have recognized the above problems and conducted various experiments for implementing a vibration device that can improve the quality of sound and can improve the sound pressure level characteristics. Through various experiments, the inventors have invented a new vibration device and a device including the same, which can improve the quality of sound and can improve the sound pressure level characteristics.

[0010] One aspect of the present disclosure aims to provide a vibration device and a device including the same, which can vibrate a device or a vibration object (or a vibration member) to generate vibration or sound, and can enhance sound characteristics and / or sound pressure level characteristics.

[0011] Another aspect of the present disclosure aims to provide a vibration device and a device including the same, which has a signal connection structure having a simplified structure.

[0012] Other advantages and features of the present disclosure will be in part apparent and in part pointed out hereinafter. The purpose of the present disclosure and other advantages will be achieved by means of the structure particularly pointed out in the written description and claims hereof as well as in the appended drawings.

[0013] To achieve these and other advantages, and in accordance with the purpose of the present disclosure, as embodied and broadly described herein, there is provided a device including a vibration member including a pad portion, a vibration device vibrating the vibration member, a pad connection member connected to the pad portion, a pad connection member connected to the pad portion, and a vibration signal connection member connecting the vibration device to the pad connection member.

[0014] In another aspect of the present disclosure, there is provided a device including a display panel displaying an image and including a pad portion, a vibration device vibrating the display panel, a pad connection member connected to the pad portion, and a vibration signal connection member between the vibration device and the pad connection member.

[0015] It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the present disclosure as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0017] Figure 1 A device according to an embodiment of the present disclosure is illustrated;

[0018] Figure 2 is a cross-sectional view taken along Figure 1 line A-A' of

[0019] Figure 3 A vibration device according to an embodiment of the present disclosure is illustrated;

[0020] Figure 4 It is along Figure 3 A cross-sectional view taken from line B-B';

[0021] Figures 5A to 5E This is a perspective view showing the vibrating portion according to an embodiment of the present disclosure;

[0022] Figure 6 A vibration device according to an embodiment of the present disclosure is shown;

[0023] Figure 7 It is along Figure 6 A cross-sectional view taken from line C-C';

[0024] Figure 8 It is along Figure 6 A cross-sectional view taken from line D-D';

[0025] Figure 9 An apparatus according to an embodiment of the present disclosure is shown;

[0026] Figure 10 It shows Figure 9 Region E;

[0027] Figure 11 It shows Figure 9 Region F;

[0028] Figure 12 It is along Figure 11 A cross-sectional view taken from line G-G';

[0029] Figure 13 An apparatus according to an embodiment of the present disclosure is shown;

[0030] Figure 14 An apparatus according to an embodiment of the present disclosure is shown;

[0031] Figure 15 An apparatus according to an embodiment of the present disclosure is shown;

[0032] Figure 16 An apparatus according to an embodiment of the present disclosure is shown; and

[0033] Figure 17 It is along Figure 16 A cross-sectional view taken from line H-H'.

[0034] Throughout the detailed embodiments and accompanying drawings, unless otherwise described, the same reference numerals should be understood to refer to the same elements, features, and structures. For clarity, illustration, and convenience, the relative sizes and depictions of these elements may be exaggerated. Detailed Implementation

[0035] The advantages and features of this disclosure, and its implementation methods, will be illustrated by the following description of embodiments with reference to the accompanying drawings. However, this disclosure may be implemented in various forms, and it should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is defined only by the scope of the claims.

[0036] The shapes, dimensions, ratios, angles, and numbers shown in the accompanying drawings to describe embodiments of this disclosure are merely examples, and therefore, this disclosure is not limited to the details shown. Throughout the specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions unnecessarily obscure the essential points of this disclosure.

[0037] When using the terms “comprising,” “having,” and “including” as described in this specification, an additional part may be added unless “only…” is used. Unless otherwise specified, singular terms may include plural forms.

[0038] When interpreting components, even if not explicitly described, the components are interpreted as including a range of tolerances.

[0039] When describing positional relationships, such as "on," "above," "below," and "adjacent," one or more parts may be arranged between two other parts unless "exactly" or "directly" is used.

[0040] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases can be included unless “exactly” or “directly” is used.

[0041] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0042] The terms “first horizontal axis direction”, “second horizontal axis direction” and “vertical axis direction” should not be interpreted solely based on the geometric relationship that the directions are perpendicular to each other, but may refer to directions that have a broader directional nature within the range in which the components of this disclosure can be functionally operated.

[0043] The term "at least one" is to be construed to include any and all combinations of one or more of the associated listed items. For example, a meaning of "at least one of a first item, a second item, and a third item" indicates all of the combinations of two or more items from the first item, the second item, and the third item as well as the first item, the second item, and the third item.

[0044] As can be fully understood by those skilled in the art, features of various embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can interoperate with each other in various ways and be technically driven. Embodiments of the present disclosure can be executed independently of each other or can be executed together in a mutually dependent relationship.

[0045] Hereinafter, preferred embodiments of an apparatus including the vibration device according to the present disclosure will be described in detail with reference to the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts. Since the ratio of each element shown in the drawings is different from the actual ratio for convenience of description, the present disclosure is not limited to the ratio shown.

[0046] An apparatus according to the present disclosure can include a display apparatus such as an organic light emitting display (OLED) module or a liquid crystal module (LCM) including a display panel and a driver for driving the display panel. Further, the apparatus can include a package (or a packaged apparatus) or a package electronic device such as a notebook computer, a TV, a computer monitor, an equipment apparatus including a car apparatus or another type of apparatus for a vehicle, or a mobile electronic device such as a smart phone or an electronic tablet as a complete product (or a final product) including the LCM or the OLED module.

[0047] Accordingly, in the present disclosure, examples of the apparatus can include the display apparatus itself such as the LCM or the OLED module, and the package as a final consumer device or an application product including the LCM or the OLED module.

[0048] In some embodiments, the LCM or the OLED module including the display panel and the driver can be referred to as a display apparatus, and the electronic device as a final product including the LCM or the OLED module can be referred to as a package. For example, the display apparatus can include a display panel such as an LCD or an OLED, and a source printed circuit board (PCB) as a controller for driving the display panel. The package can further include a package PCB as a package controller electrically connected to the source PCB to overall control the package.

[0049] The display panel applied to the embodiments of the disclosure can use all types of display panels, such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, and an electroluminescent display panel, but is not limited to a specific display panel that is vibrated by the sound generating device according to the embodiments of the disclosure to output sound. In addition, the shape or size of the display panel applied to the display device according to the embodiments of the disclosure is not limited.

[0050] For example, when the display panel is a liquid crystal display panel, the display panel can include a plurality of gate lines, a plurality of data lines, and a plurality of pixels disposed in a plurality of intersection regions defined by the gate lines and the data lines. In addition, the display panel can include an array substrate including a thin film transistor (TFT) as a switching element for adjusting the light transmittance of each pixel, an upper substrate including a color filter and / or a black matrix, and a liquid crystal layer formed between the array substrate and the upper substrate.

[0051] When the display panel is an organic light emitting display panel, the display panel can include a plurality of gate lines, a plurality of data lines, and a plurality of pixels respectively disposed in a plurality of pixel regions defined by the intersection points of the gate lines and the data lines. In addition, the display panel can include an array substrate including a thin film transistor (TFT) as an element for selectively applying a voltage to each pixel, an organic light emitting device layer on the array substrate, and an encapsulation substrate disposed on the array substrate to cover the organic light emitting device layer. The encapsulation substrate can protect the TFT and the organic light emitting device layer from external impact damage and can prevent water or oxygen from penetrating into the organic light emitting device layer. In addition, the layer disposed on the array substrate can include an inorganic light emitting layer (e.g., a nano-sized material layer, a quantum dot, etc.). As another example, the layer disposed on the array substrate can include a micro light emitting diode.

[0052] The display panel can further include a backer such as a metal plate attached to the display panel. However, the present embodiment is not limited to a metal plate, and the display panel can include another structure (e.g., another structure including another material).

[0053] As can be fully understood by those skilled in the art, the features of various embodiments of the disclosure can be partially or wholly coupled or combined with each other and can be interoperable and technically driven in different ways with each other. The embodiments of the disclosure can be executed independently of each other or can be executed together in a common dependency relationship.

[0054] Figure 1 A device 10 according to an embodiment of the disclosure is shown, and Figure 2 is a cross-sectional view taken along Figure 1 line A-A'.

[0055] Referring to Figure 1 and Figure 2 The device 10 according to embodiments of the disclosure can include a vibration member 100 and a vibration device 200 disposed on a rear surface (or backside surface) of the vibration member 100.

[0056] For example, the vibration member 100 can output a sound based on vibration of the vibration device 200. The vibration device 200 can output the sound by using the vibration member 100 as a vibration plate. For example, the vibration device 200 can output the sound to the front surface of the vibration member 100 by using the vibration member 100 as a vibration plate. For example, the vibration device 200 can generate the sound so that the sound travels toward the display panel or the front surface of the vibration member 100. The vibration device 200 can vibrate the vibration member 100 to output the sound. For example, the vibration device 200 can directly vibrate the vibration member 100 to output the sound. For example, the vibration member 100 can be a vibration object, a display panel, a vibration plate, or a front member, but embodiments of the disclosure are not limited thereto. Hereinafter, an embodiment in which the vibration member is a display panel will be described.

[0057] The vibration member 100 can display an image (e.g., an electronic image, a digital image, a still image, or a video image). For example, the vibration member 100 can emit light to display the image. The display panel can be a curved display panel or all types of display panels, such as a liquid crystal display panel, an organic light emitting display panel, a quantum dot light emitting display panel, a micro light emitting diode display panel, and an electrophoretic display panel. For example, the vibration member 100 can be a flexible light emitting display panel, a flexible electrophoretic display panel, a flexible electro wetting display panel, a flexible micro light emitting diode display panel, or a flexible quantum dot light emitting display panel, but embodiments of the disclosure are not limited thereto.

[0058] The vibration member 100 according to embodiments of the disclosure can include a display area (or active area) AA that displays an image based on a plurality of pixels. The vibration member 100 can include a non-display area (or inactive area) IA surrounding the display area AA, but embodiments of the disclosure are not limited thereto.

[0059] The vibration member 100 according to embodiments of the disclosure can include an anode electrode, a cathode electrode, and a light emitting device, and can display an image in a type such as a top emission type, a bottom emission type, or a dual emission type based on a structure of a pixel array layer including a plurality of pixels. In the top emission type, visible light emitted from the pixel array layer can be irradiated in a forward direction of a base substrate to allow the display of the image; and in the bottom emission type, visible light emitted from the pixel array layer can be irradiated in a rearward direction of the base substrate to allow the display of the image.

[0060] The vibration member 100 according to the embodiment of the disclosure can include a pixel array portion disposed on a substrate. The pixel array portion can include a plurality of pixels displaying an image based on a signal supplied through each signal line. The signal line can include a gate line, a data line, and a pixel driving power line, but embodiments of the disclosure are not limited thereto.

[0061] Each of the plurality of pixels can include a pixel circuit layer including a driving TFT disposed in a pixel region configured by a plurality of gate lines and / or a plurality of data lines, an anode electrode electrically connected to the driving TFT, a light emitting device formed on the anode electrode, and a cathode electrode electrically connected to the light emitting device.

[0062] The driving TFT can be disposed in a transistor region of each pixel region disposed in the substrate. The driving TFT can include a gate electrode, a gate insulating layer, a semiconductor layer, a source electrode, and a drain electrode. The semiconductor layer of the driving TFT can include silicon such as amorphous silicon (a-Si), polycrystalline silicon (poly-Si), or low-temperature polycrystalline silicon, or can include an oxide such as indium gallium zinc oxide (IGZO), but embodiments of the disclosure are not limited thereto.

[0063] The anode electrode (or pixel electrode) can be disposed in an opening region disposed in each pixel region and can be electrically connected to the driving TFT.

[0064] The light emitting device according to the embodiment of the disclosure can include an organic light emitting device layer disposed on the anode electrode. The organic light emitting device layer can be implemented such that the pixels emit the same color light (e.g., white light) or emit different color lights (e.g., red light, green light, and blue light). The cathode electrode (or common electrode) can be connected to the organic light emitting device layer disposed in each pixel region. For example, the organic light emitting device layer can have a stacked structure including two or more structures or a single structure including the same color.

[0065] In another embodiment of the disclosure, the organic light emitting device layer can have a stacked structure including two or more structures including one or more different colors for each pixel. The two or more structures including one or more different colors can be configured as one or more of blue, red, yellow-green, and green or a combination thereof, but embodiments of the disclosure are not limited thereto. Examples of the combination can include blue and red, red and yellow-green, red and green, and red / yellow-green / green, but embodiments of the disclosure are not limited thereto. Further, the combination can be applied regardless of the stacking order thereof. The stacked structure including two or more structures having the same color or one or more different colors can further include a charge generation layer positioned between the two or more structures. The charge generation layer can have a PN junction structure and can include an N-type charge generation layer and a P-type charge generation layer.

[0066] According to another embodiment of the disclosure, the light emitting device can include a micro light emitting diode device electrically connected to each of the anode electrode and the cathode electrode. The micro light emitting diode device can be a light emitting diode implemented in an integrated circuit (IC) type or a chip type. The micro light emitting diode device can include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode can be connected to the second terminal of the micro light emitting diode device disposed in each pixel area.

[0067] The encapsulation portion can be formed on the substrate to surround the pixel array portion, and thus penetration of oxygen or water into the light emitting device layer of the pixel array portion can be prevented. The encapsulation portion according to an embodiment of the disclosure can be formed as a multi-layer structure in which an organic material layer and an inorganic material layer are alternately stacked, but embodiments of the disclosure are not limited thereto. The inorganic material layer can prevent penetration of oxygen or water into the light emitting device layer of the pixel array portion. The organic material layer can be formed to have a thickness relatively thicker than that of the inorganic material layer so as to cover particles occurring in a manufacturing process. For example, the encapsulation portion can include a first inorganic layer, an organic layer on the first inorganic layer, and a second inorganic layer on the organic layer. The organic layer can be a particle covering layer, but the term is not limited thereto. A touch panel can be disposed on the encapsulation portion, or can be disposed on a rear surface of the pixel array portion or in the pixel array portion.

[0068] The vibration member 100 according to an embodiment of the disclosure can include a first substrate, a second substrate, and a liquid crystal layer. The first substrate can be an upper substrate or a TFT array substrate. For example, the first substrate can include a pixel array (or a display portion or a display area) including a plurality of pixels disposed in a pixel region configured by a plurality of gate lines and / or a plurality of data lines. Each of the plurality of pixels can include a TFT connected to a gate line and / or a data line, a pixel electrode connected to the TFT, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

[0069] The first substrate can further include a pad portion disposed at a first edge (or a non-display portion) thereof and a gate driving circuit disposed at a second edge (or a second non-display portion) thereof.

[0070] The pad portion can supply a signal supplied from the outside to the pixel array portion and / or the gate driving circuit. For example, the pad portion can include a plurality of data pads connected to a plurality of data lines through a plurality of data link lines and / or a plurality of gate input pads connected to the gate driving circuit through a gate control signal line. For example, the size of the first substrate can be greater than the size of the second substrate, but the term is not limited thereto.

[0071] The gate driving circuit can be embedded (or integrated) into the second edge of the first substrate so as to be connected to the plurality of gate lines. For example, the gate driving circuit can be implemented with a shift register including transistors formed through the same process as the TFTs disposed in the pixel region. According to another embodiment of the disclosure, the gate driving circuit can not be embedded in the first substrate and can be disposed in a panel driving circuit in an IC type.

[0072] The second substrate can be a lower substrate or a color filter array substrate. For example, the second substrate can include a pixel pattern (or a pixel defining pattern) which can include an opening region overlapping the pixel region formed in the first substrate and a color filter layer formed in the opening region. The second substrate can have a size smaller than the size of the first substrate, but embodiments of the disclosure are not limited thereto. The second substrate can overlap other portions of the first substrate except for the first edge. The second substrate can be bonded to other portions of the first substrate except for the first edge with a sealant therebetween.

[0073] The liquid crystal layer can be disposed between the first substrate and the second substrate. The liquid crystal layer can include liquid crystals in which an arrangement direction of liquid crystal molecules is changed based on an electric field generated by a data voltage applied to a pixel electrode of each pixel and a common voltage.

[0074] A second polarizing member can be attached on a bottom surface of the second substrate and can polarize light incident from the backlight and proceeding to the liquid crystal layer. A first polarizing member can be attached on a top surface of the first substrate and can polarize light passing through the first substrate and released to the outside.

[0075] The vibration member 100 according to an embodiment of the disclosure can drive the liquid crystal layer with an electric field generated by a data voltage and a common voltage applied to each pixel, thereby displaying an image based on light passing through the liquid crystal layer.

[0076] In the vibration member 100 according to another embodiment of the disclosure, the first substrate can be a color filter array substrate, and the second substrate can be a TFT array substrate. For example, the vibration member 100 according to another embodiment of the disclosure can have a form in which the vibration member 100 according to an embodiment of the disclosure is vertically inverted. In this case, the pad portion of the vibration member 100 according to another embodiment of the disclosure can be covered by a separate mechanism.

[0077] The vibration member 100 according to another embodiment of the disclosure can include a bent portion bent or curved to have a certain radius of curvature or a curved shape.

[0078] The bent portion of the vibration member 100 can be implemented at one or more of one edge portion and the other edge portion of the vibration member 100 parallel to each other. The one edge portion and the other edge portion of the vibration member 100 in which the bent portion is implemented can include only the non-display area IA, or can include the edge portion of the display area AA and the non-display area IA. The vibration member 100 including the bent portion implemented by bending the non-display area IA can have a one-side bezel bending structure or a double-side bezel bending structure. In addition, the vibration member 100 including the edge portion of the display area AA and the bent portion implemented by bending the non-display area IA can have a one-side active bending structure or a double-side active bending structure.

[0079] The vibration device 200 can vibrate the vibration member 100 at the rear surface of the vibration member 100, and thus can provide sound and / or haptic feedback to a user based on the vibration of the vibration member 100. The vibration device 200 can be implemented on the rear surface of the vibration member 100 to directly vibrate the vibration member 100. For example, the vibration device 200 can be a vibration generation device, a displacement device, a sound device, or a sound generation device, but the term is not limited thereto.

[0080] In an embodiment of the disclosure, the vibration device 200 can vibrate based on a vibration driving signal synchronized with an image displayed by the vibration member 100, thereby vibrating the vibration member 100. According to another embodiment of the disclosure, the vibration device 200 can vibrate based on a haptic feedback signal (or a tactile feedback signal) synchronized with a user touch applied to a touch panel (or a touch sensor layer) disposed on or embedded in the vibration member 100, and thus, the vibration device 200 can vibrate the vibration member 100. Accordingly, the vibration member 100 can vibrate based on the vibration of the vibration device 200 to provide one or more of sound and haptic feedback to a user (or a viewer).

[0081] The vibration device 200 can vibrate the display panel or the vibration member 100. For example, the vibration device 200 can be implemented on a rear surface of the vibration member 100 to directly vibrate the display panel or the vibration member 100. For example, the vibration device 200 can vibrate the vibration member 100 at a rear surface of the display panel or the vibration member 100, and thus, the vibration device 200 can provide sound and haptic feedback to a user (or a viewer) based on the vibration of the display panel or the vibration member 100.

[0082] The vibration device 200 according to an embodiment of the disclosure can be implemented as a film type. Since the vibration device 200 is implemented as a film type, the thickness of the vibration device 200 can be thinner than the vibration member 100, thereby minimizing an increase in the thickness of a device due to the arrangement of the vibration device 200. For example, the vibration device 200 can be referred to as a sound generating module, a sound generating device, a vibration generating device, a displacement device, a sound device, a film actuator, a film type piezoelectric composite actuator, a film speaker, a film type piezoelectric speaker, or a film type piezoelectric composite speaker using the display panel or the vibration member 100 as a vibration plate or a sound vibration plate, but the term is not limited thereto.

[0083] The vibration device 200 according to an embodiment of the disclosure can include a ceramic-based material for generating relatively high vibration, or can include a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure can have a piezoelectric effect and / or a converse piezoelectric effect, and can be a plate-shaped structure having an orientation. The perovskite crystal structure can be represented by a chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. For example, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be an anion. For example, the first portion 51a can include one or more of lead(II) titanate (PbTiO3), lead zirconate (PbZrO3), lead zirconate titanate (PbZrTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3), but embodiments of the disclosure are not limited thereto.

[0084] In the perovskite crystal structure, the position of the central ion can be changed by an external stress or a magnetic field to change the polarization, and a piezoelectric effect can be generated based on the change in the polarization. In the perovskite crystal structure including PbTiO3, the position of the Ti ion corresponding to the central ion can be changed to change the polarization, and thus a piezoelectric effect can be generated. For example, in the perovskite crystal structure, by using an external stress or a magnetic field, a cubic shape having a symmetric structure can be changed to a tetragonal shape, an orthorhombic shape, and a rhombohedral shape each having an asymmetric structure, and thus a piezoelectric effect can be generated. The polarization can be high at a morphotropic phase boundary (MPB) of the tetragonal structure and the rhombohedral structure, and the polarization can be easily realigned, thereby obtaining high piezoelectric properties.

[0085] According to one embodiment of the disclosure, the vibration device 200 can include one or more materials of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto.

[0086] The vibration device 200 according to another embodiment of the disclosure can include a single crystal ceramic and / or a polycrystal ceramic. The single crystal ceramic can be a material in which grains of a single crystal domain having a specific structure are regularly arranged. The polycrystal ceramic can include irregular grains in which various crystal domains are provided.

[0087] According to another embodiment of the disclosure, the vibration device 200 can include a lead zirconium titanate (PZT)-based material including lead (Pb), zirconium (Zr), and titanium (Ti); or can include a lead zirconate nickel niobate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto. According to another embodiment of the disclosure, the vibration device 200 can include one or more of calcium titanate (CaTiO3), BaTiO3, and SrTiO3 each not including Pb, but embodiments of the disclosure are not limited thereto.

[0088] According to another embodiment of the disclosure, the vibration device 200 can have a piezoelectric deformation coefficient "d 33 " of 1000 pC / N or more in the thickness direction Z. By having a high piezoelectric deformation coefficient "d 33 ", a vibration device that can be applied to a display panel or a vibration member (or a vibration object) having a large size or can have sufficient vibration properties or piezoelectric properties can be provided. For example, in order to have a high piezoelectric deformation coefficient "d 33The inorganic material portion can include a PZT-based material (PbZrTiO3) as a main component and can include a softener dopant material doped into an A-site (Pb) and a relaxor ferroelectric material doped into a B-site (ZrTi).

[0089] The softener dopant material can enhance piezoelectric properties and dielectric properties of the vibration device 200. For example, the softener dopant material can increase a piezoelectric strain coefficient "d 33 " of the inorganic material portion. The softener dopant material according to the embodiment of the disclosure can include a divalent element "+2" to a trivalent element "+3". A morphotropic phase boundary (MPB) can be achieved by adding the softener dopant material to the PZT-based material (PbZrTiO3), and thus, the piezoelectric properties and the dielectric properties can be enhanced. For example, the softener dopant material can include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, ions (e.g., Sr 2+ , Ba 2+ , La 2+ , Nd 3+ , Ca 2+ , Y 3+ , Er 3+ , and Yb 3+ ) of the softener dopant material doped into the PZT-based material (PbZrTiO3) can replace a portion of lead (Pb) in the PZT-based material (PbZrTiO3), and a replacement rate thereof can be about 2 mol% to about 20 mol%. For example, when the replacement rate is less than 2 mol% or greater than 20 mol%, a perovskite crystal structure can be destroyed, and thus, an electromechanical coupling coefficient "kP" and a piezoelectric strain coefficient "d 33 " can be reduced. When the softener dopant material is replaced, the MPB can be formed, and piezoelectric properties and dielectric properties in the MPB can be high, thereby realizing a vibration device having high piezoelectric properties and high dielectric properties.

[0090] According to embodiments of the present disclosure, a relaxor ferroelectric material doped into a PZT-based material (PbZrTiO3) can enhance the electro-deformation characteristics of the inorganic material portion. The relaxor ferroelectric material according to embodiments of the present disclosure can include a PMN-based material, a PNN-based material, a PZN-based material, or a PIN-based material, but embodiments of the present disclosure are not limited thereto. The PMN-based material can include Pb, Mg, and Nb, and for example, can include Pb(Mg,Nb)O3. The PNN-based material can include Pb, Ni, and Nb, and for example, can include Pb(Ni,Nb)O3. The PZN-based material can include Pb, Zr, and Nb, and for example, can include Pb(Zn,Nb)O3. The PIN-based material can include Pb, In, and Nb, and for example, can include Pb(In,Nb)O3. For example, the relaxor ferroelectric material doped into the PZT-based material (PbZrTiO3) can replace a portion of each of zirconium (Zr) and titanium (Ti) in the PZT-based material (PbZrTiO3), and the replacement rate thereof can be about 5 mol% to about 25 mol%. For example, when the replacement rate is less than 5 mol% or greater than 25 mol%, the perovskite crystal structure can be destroyed, and thus, the electromechanical coupling coefficient "kP" and the piezoelectric deformation coefficient "d 33 " can be reduced.

[0091] According to embodiments of the present disclosure, the vibration device 200 can further include a donor material doped into the B site (ZrTi) of the PZT-based material (PbZrTiO3) to further improve the piezoelectric coefficient. For example, the donor material doped into the B site (ZrTi) can include a tetravalent element "+4" or a hexavalent element "+6". For example, the donor material doped into the B site (ZrTi) can include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0092] The vibration device 200 according to embodiments of the present disclosure can have a piezoelectric deformation coefficient "d 33 " of 1000 pC / N or more in the thickness direction Z, and thus, a vibration device having enhanced vibration characteristics can be implemented. For example, a vibration device having enhanced vibration characteristics can be implemented in a vibration object or device having a large area.

[0093] According to another embodiment of the disclosure, the vibration device 200 can not be disposed on the rear surface of the vibration member 100 and can be applied to a non-display panel rather than a display panel. For example, the non-display panel can be one or more of wood, plastic, glass, metal, cloth, fiber, rubber, paper, leather, an interior material of a vehicle, an indoor ceiling of a building, and an interior material of an aircraft, but embodiments of the disclosure are not limited thereto. In this case, the non-display panel can be applied as a vibration plate, and the vibration device 200 can vibrate the non-display panel to output sound.

[0094] For example, a device according to an embodiment of the disclosure can include a vibration member (or a vibration object) and a vibration device 200 disposed in the vibration member. For example, the vibration member can include a display panel including pixels displaying an image, or can include a non-display panel. For example, the vibration member can include a display panel including pixels displaying an image, or can be one or more of wood, plastic, glass, metal, cloth, fiber, rubber, paper, leather, a mirror, an interior material of a vehicle, a glass window of a vehicle, an indoor ceiling of a building, a glass window of a building, an interior material of a building, an interior material of an aircraft, and a glass window of an aircraft, but embodiments of the disclosure are not limited thereto. For example, the vibration member can include one or more of a display panel including pixels displaying an image, a screen panel onto which an image is projected from a display device, an illumination panel, a sign panel, an interior material of a vehicle, a glass window of a vehicle, an exterior material of a vehicle, a ceiling material of a building, an interior material of a building, a glass window of a building, an interior material of an aircraft, a glass window of an aircraft, and a mirror, but embodiments of the disclosure are not limited thereto. For example, the non-display panel can be a light emitting diode illumination panel (or device), an organic light emitting diode illumination panel (or device), or an inorganic light emitting diode illumination panel (or device), but embodiments of the disclosure are not limited thereto. For example, the vibration member can include a display panel including pixels displaying an image, or can be one or more of a light emitting diode illumination panel (or device), an organic light emitting diode illumination panel (or device), or an inorganic light emitting diode illumination panel (or device), but embodiments of the disclosure are not limited thereto.

[0095] According to another embodiment of the present disclosure, the vibration member can include a plate. The plate can include a metal material, or can include a single non-metal material or a composite non-metal material including one or more of wood, plastic, glass, cloth, fiber, rubber, paper, mirror, and leather, but embodiments of the present disclosure are not limited thereto. According to another embodiment of the present disclosure, the vibration member can include a plate. The plate can include one or more of metal, wood, plastic, glass, cloth, fiber, rubber, paper, mirror, and leather, but embodiments of the present disclosure are not limited thereto. For example, the paper can be a cone paper for a speaker. For example, the cone paper can be pulp or foamed plastic, but embodiments of the present disclosure are not limited thereto. For example, the vibration member can be a vibration object, a vibration plate, or a front member, but embodiments of the present disclosure are not limited thereto.

[0096] The vibration device 200 according to an embodiment of the present disclosure can be disposed on a rear surface of the vibration member 100 to overlap with a display area of the vibration member 100. For example, the vibration device 200 can overlap with a display area corresponding to one half or more in the display area of the vibration member 100. According to another embodiment of the present disclosure, the vibration device 200 can overlap with the entire display area of the vibration member 100.

[0097] When an alternating current (AC) voltage is applied, the vibration device 200 according to an embodiment of the present disclosure can alternately contract and expand based on the inverse piezoelectric effect, and can vibrate the vibration member 100 based on the vibration. According to one embodiment of the present disclosure, the vibration device 200 can vibrate based on a voice signal synchronized with an image displayed by a display panel, to vibrate the vibration member 100. According to another embodiment of the present disclosure, the vibration device 200 can vibrate based on a haptic feedback signal (or a tactile feedback signal) synchronized with a user touch applied to a touch panel (or a touch sensor layer) disposed on or embedded in the vibration member 100, and thus the vibration device 200 can vibrate the vibration member 100. Accordingly, the vibration member 100 can vibrate based on the vibration of the vibration device 200, to provide one or more of sound and haptic feedback to a user (or a viewer).

[0098] Accordingly, the device according to an embodiment of the present disclosure can output sound generated by the vibration of the vibration member 100 based on the vibration of the vibration device 200 in a forward direction of the vibration member 100. In addition, the device according to an embodiment of the present disclosure can vibrate a large area of the vibration member 100 by using a film-type vibration device 200, thereby more enhancing a sound localization feeling and a sound pressure level characteristic of sound based on the vibration of the vibration member 100.

[0099] According to an embodiment of the disclosure, the rear surface (or back surface) of the vibration member 100 can include a first area (or first rear area) A1 and a second area (or second rear area) A2. For example, on the rear surface of the vibration member 100, the first area A1 can be a left rear area, and the second area A2 can be a right rear area. The first area A1 and the second area A2 can be horizontally symmetrical about the center line CL of the vibration member 100 for the first direction X, but embodiments of the disclosure are not limited thereto. For example, each of the first area A1 and the second area A2 can overlap with a display area of the vibration member 100.

[0100] The vibration device 200 according to an embodiment of the disclosure can include a first vibration device 200-1 and a second vibration device 200-2 disposed on the rear surface of the vibration member 100.

[0101] The first vibration device 200-1 can be disposed in the first area A1 of the vibration member 100. For example, the first vibration device 200-1 can be disposed close to a central portion or an edge of the first area A1 of the vibration member 100 with respect to the first direction X. The first vibration device 200-1 according to an embodiment of the disclosure can vibrate the first area A1 of the vibration member 100, and thus can generate a first vibration sound or a first haptic feedback in the first area A1 of the vibration member 100. For example, the first vibration device 200-1 according to an embodiment of the disclosure can directly vibrate the first area A1 of the vibration member 100, and thus the first vibration device 200-1 can generate a first vibration sound or a first haptic feedback in the first area A1 of the vibration member 100. For example, the first vibration sound can be a left sound. The size of the first vibration device 200-1 according to an embodiment of the disclosure can be half or less or half or more of the size of the first area A1, based on a sound characteristic desired for the device or a characteristic of the first vibration sound. In another embodiment of the disclosure, the size of the first vibration device 200-1 can be a size corresponding to the first area A1 of the vibration member 100. For example, the size of the first vibration device 200-1 can be a size smaller than or equal to the size of the first area A1 of the vibration member 100.

[0102] The second vibration device 200-2 can be disposed in the second area A2 of the vibration member 100. For example, the second vibration device 200-2 can be disposed to be close to a central portion or an edge of the second area A2 of the vibration member 100 with respect to the first direction X. The second vibration device 200-2 according to an embodiment of the disclosure can vibrate the second area A2 of the vibration member 100, and thus, the second vibration device 200-2 can generate a second vibration sound or a second haptic feedback in the second area A1 of the vibration member 100. For example, the second vibration device 200-2 according to an embodiment of the disclosure can directly vibrate the second area A2 of the vibration member 100, and thus, the second vibration device 200-2 can generate a second vibration sound or a second haptic feedback in the second area A2 of the vibration member 100. For example, the second vibration sound can be a right sound. The size of the second vibration device 200-2 according to an embodiment of the disclosure can be half or less or half or more of the size of the second area A2, based on a sound characteristic desired for the device or a characteristic of the second vibration sound. In another embodiment of the disclosure, the size of the second vibration device 200-2 can be a size corresponding to the display panel or the second area A2 of the vibration member 100. For example, the size of the second vibration device 200-2 can be less than or equal to the size of the second area A2 of the vibration member 100. Thus, the first vibration device 200-1 and the second vibration device 200-2 can have the same size or different sizes, based on left and right sound characteristics of the device and / or sound characteristics of the device. In addition, the first vibration device 200-1 and the second vibration device 200-2 can be disposed in a left-right symmetrical structure or a left-right asymmetrical structure with respect to the center line CL of the vibration member 100.

[0103] Each of the first vibration device 200-1 and the second vibration device 200-2 can include a piezoelectric structure material (vibration portion or piezoelectric vibration portion) including a piezoelectric ceramic having a piezoelectric property, but embodiments of the disclosure are not limited thereto. For example, each of the first vibration device 200-1 and the second vibration device 200-2 according to an embodiment of the disclosure can include a piezoelectric ceramic having a perovskite crystal structure, and thus, can vibrate (or be mechanically displaced) in response to an electric signal applied from the outside. For example, when a vibration driving signal (or a voice signal) is applied, each of the first vibration device 200-1 and the second vibration device 200-2 can alternately and repeatedly contract and expand based on a converse piezoelectric effect of the piezoelectric structure material (vibration portion or piezoelectric vibration portion), and thus, each of the first vibration device 200-1 and the second vibration device 200-2 can be displaced (or vibrate) in the same direction based on a bending phenomenon in which a bending direction alternately changes, whereby a displacement amount (or a bending force) or a displacement amplitude of the vibration device 200 or / and the vibration member 100 can increase or can be maximized.

[0104] The vibration generated by each of the first vibration device 200-1 and the second vibration device 200-2 can make the first area (or the first rear area) A1 and the second area (or the second rear area) A2 all vibrate, thereby improving the satisfaction of the user and increasing the localization of the sound. In addition, the contact area (or the panel coverage) between the vibration member 100 and each of the first vibration device 200-1 and the second vibration device 200-2 can be increased, and thus, the vibration area of the vibration member 100 can be increased, thereby enhancing the sound of the mid-low high sound band based on the vibration of the vibration member 100. In addition, the vibration device 200 applied to a large size device can make the vibration member 100 having a large size (or a large area) all vibrate, and thus, the localization of the sound based on the vibration of the vibration member 100 can be more enhanced, thereby achieving an enhanced sound effect. Accordingly, the vibration device 200 according to the embodiment of the disclosure can be disposed on the rear surface of the vibration member 100 to sufficiently vibrate the vibration member 100 in the vertical (or forward and rearward) direction, thereby outputting a desired sound in the forward direction of the display device or the device. For example, the vibration device 200 can be disposed on the rear surface of the vibration member 100 to sufficiently vibrate the vibration member 100 in the vertical (or forward and rearward) direction with respect to the first direction X, thereby outputting a desired sound in the forward direction of the display device or the device.

[0105] The vibration device 200 according to the embodiment of the disclosure can further include a connection member 250. For example, the connection member 250 can be disposed between the vibration device 200 and the vibration member 100. For example, the connection member 250 can be disposed between each of the first vibration device 200-1 and the second vibration device 200-2 and the vibration member 100.

[0106] The connection member 250 can be disposed between each of the first vibration device 200-1 and the second vibration device 200-2 and the vibration member 100. For example, the vibration device 200 can be connected or coupled to the rear surface of the vibration member 100 by using the connection member 250, and thus, the vibration device 200 can be supported by or disposed on the rear surface of the vibration member 100.

[0107] According to another embodiment of the present disclosure, the connection member 250 can further include a hollow portion disposed between the vibration device 200 and the vibration member 100. The hollow portion of the connection member 250 can provide an air gap between the vibration device 200 and the vibration member 100. Based on the air gap, a sound wave (or a sound pressure level) based on the vibration of the vibration device 200 can not be dispersed by the connection member 250 and can be concentrated on the vibration member 100, and thus, a loss based on the vibration of the connection member 250 can be minimized, thereby improving a sound pressure level characteristic and / or a sound characteristic of a sound generated based on the vibration of the vibration member 100.

[0108] The device according to an embodiment of the present disclosure can further include a connection member 250 (or a first connection member) between the vibration device 200 and the vibration member 100 or the display panel.

[0109] For example, the connection member 250 can be disposed between the vibration device 200 and a rear surface of the display panel or the vibration member 100, and thus, the connection member 250 can connect or couple the vibration device 200 to the rear surface of the vibration member 100. For example, the vibration device 200 can be connected or coupled to the rear surface of the display panel or the vibration member 100 by using the connection member 250, and thus, the vibration device 200 can be supported by or disposed on the rear surface of the display panel or the vibration member 100. For example, the vibration device 200 can be disposed on the rear surface of the display panel or the vibration member 100 by using the connection member 250.

[0110] The connection member 250 according to an embodiment of the present disclosure can include a material including an adhesive layer having good adhesion or attachment force with respect to each of the rear surface of the vibration member 100 and the vibration device 200. For example, the connection member 250 can include a foam pad, a double-sided tape, or an adhesive, but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the connection member 250 can include an epoxy resin, an acryl-based, a silicone, or a urethane, but embodiments of the present disclosure are not limited thereto. For example, the adhesive layer of the connection member 250 can include an acryl-based material having a property of relatively good adhesion and high hardness among acryl-based and urethane. Thus, the vibration of the vibration device 200 can be well transmitted to the vibration member 100.

[0111] The adhesive layer of the connection member 250 can further include an additive such as a tackifier, a wax component, or an antioxidant, but embodiments of the present disclosure are not limited thereto. The additive can prevent the connection member 250 from being separated (peeled) from the vibration member 100 due to vibration of the vibration device 200. For example, the tackifier can be a rosin derivative, the wax component can be paraffin wax, and the antioxidant can be a phenol-based antioxidant such as a mercaptan ester, but embodiments of the present disclosure are not limited thereto.

[0112] According to another embodiment of the present disclosure, the connection member 250 can further include a hollow portion disposed between the vibration device 200 and the vibration member 100. The hollow portion of the connection member 250 can provide an air gap between the vibration device 200 and the vibration member 100 or the display panel. Based on the air gap, a sound wave (or a sound pressure level) based on vibration of the vibration device 200 can not be dispersed by the connection member 250 and can be concentrated on the vibration member 100 or the display panel, and thus, a loss based on vibration of the connection member 250 can be minimized, thereby improving a sound pressure level characteristic and / or a sound characteristic of a sound generated based on vibration of the vibration member 100.

[0113] The device 10 according to an embodiment of the present disclosure can further include a support member 140 disposed on a rear surface (or a backside surface) of the vibration member 100.

[0114] The support member 140 can be disposed on a rear surface of the vibration member 100 or the display panel. For example, the support member 140 can cover an entire rear surface of the vibration member 100 or the display panel. For example, the support member 140 can include one or more of a glass material, a metal material, and a plastic material. For example, the support member 140 can be a rear structure material, a fixing structure material, a support structure material, a support cover, a rear member, a housing, or a case, but the terms are not limited thereto. The support member 140 can be referred to as other terms such as a cover bottom, a plate bottom, a rear cover, a base frame, a metal frame, a metal chassis, a chassis base, or an m-chassis. For example, the support member 140 can be implemented as an arbitrary type of frame or plate structure material disposed on the rear surface of the vibration member 100.

[0115] An edge or a sharp corner portion of the support member 140 can have an inclined shape or a curved shape through a chamfering process or a rounding process. For example, a glass material of the support member 140 can be sapphire glass. In another embodiment of the present disclosure, the support member 140 including a metal material can include one or more materials among aluminum (Al), an aluminum alloy, a magnesium (Mg) alloy, and an iron (Fe)-nickel (Ni) alloy.

[0116] The support member 140 according to an embodiment of the disclosure can include a first support member 141 and a second support member 143.

[0117] The first support member 141 can be disposed between the second support member 143 and a rear surface of the display panel 100. For example, the first support member 141 can be disposed between a front edge of the second support member 143 and a rear edge of the display panel 100. The first support member 140 can support one or more of an edge portion of the second support member 143 and an edge portion of the display panel 100. In another embodiment of the disclosure, the first support member 141 can cover the rear surface of the display panel 100. For example, the first support member 140 can cover the entire rear surface of the display panel 100. For example, the first support member 141 can be a member that covers the entire rear surface of the display panel 100. For example, the first support member 141 can include one or more of a glass material, a metal material, and a plastic material. For example, the first support member 141 can be an inner plate, a first rear structure material, a first support structure material, a first support cover, a first back cover, a first rear member, an inner plate, or an inner cover, but the terms are not limited thereto. As another example, the first support member 141 can be omitted.

[0118] The first support member 141 can be separated from the last surface of the vibration member 100 with a gap space GS between the first support member 141 and the last surface of the vibration member 100, or the first support member 141 can be separated from the vibration device 200. For example, the gap space GS can be referred to as an air gap, a vibration space, and a sound resonance box, but the terms are not limited thereto.

[0119] The second support member 143 can be disposed on a rear surface of the first support member 141. The second support member 143 can be a member that covers the entire rear surface of the display panel 100. For example, the second support member 143 can include one or more of a glass material, a metal material, and a plastic material. For example, the second support member 143 can be an outer plate, a rear plate, a back plate, a back cover, a rear cover, a second rear structure material, a second support structure material, a second support cover, a second back cover, a second rear member, an outer plate, or an outer cover, but the terms are not limited thereto.

[0120] The support member 140 according to an embodiment of the disclosure can further include a connection member 145 (or a second connection member).

[0121] The connection member 145 can be disposed between the first support member 141 and the second support member 143. For example, the first support member 140 can be coupled or connected to the second support member 143 by using the connection member 145. For example, the connection member 145 can be an adhesive resin, a double-sided tape, or a double-sided adhesive foam pad, but embodiments of the present disclosure are not limited thereto. For example, the connection member 145 can have elasticity for absorbing an impact, but embodiments of the present disclosure are not limited thereto. For example, the connection member 145 can be disposed in the entire area between the first support member 141 and the second support member 143. In another embodiment of the present disclosure, the connection member 145 can be formed in a mesh structure including an air gap between the first support member 140 and the second support member 143.

[0122] The device according to an embodiment of the present disclosure can further include an intermediate frame 150. The intermediate frame 150 can be disposed between the rear edge of the display panel or the vibration member 100 and the front edge of the support member 140. The intermediate frame 150 can support one or more of the edge portion of the vibration member 100 and the edge portion of the support member 140. The intermediate frame 150 can surround one or more of the side surfaces of each of the vibration member 100 and the support member 140. The intermediate frame 150 can provide a gap space GS between the display panel and the support member 140. The intermediate frame 150 can be referred to as an intermediate chassis, an intermediate cover, an intermediate bezel, a connection member, a frame, a frame member, an intermediate member, or a side cover member, but the terms are not limited thereto.

[0123] The intermediate frame 150 according to an embodiment of the present disclosure can include a first support portion 151 and a second support portion 153. For example, the first support portion 152 can be a support portion, but the term is not limited thereto. For example, the second support portion 153 can be a side wall portion, but the term is not limited thereto.

[0124] The first support portion 151 can be disposed between the rear edge of the vibration member 100 and the front edge of the support member 140, and thus the first support portion 151 can provide a gap space GS between the vibration member 100 and the support member 140. The front surface of the first support portion 151 can be coupled or connected to the rear edge of the vibration member 100 by a first adhesive member 155. The rear surface of the first support portion 151 can be coupled or connected to the front edge of the support member 140 by a second adhesive member 157. For example, the first support portion 151 can have a single frame structure having a quadrangular shape or a frame structure having a plurality of partition bars, but embodiments of the present disclosure are not limited thereto.

[0125] The second support portion 153 can be disposed in parallel with the thickness direction Z of the device. For example, the second support portion 153 can be coupled to an outer surface of the first support portion 151 vertically, in parallel with the thickness direction Z of the device. The second support portion 153 can surround one or more of an outer surface of the vibration member 100 and an outer surface of the support member 140, thereby protecting the outer surface of each of the vibration member 100 and the support member 140. The first support portion 151 can protrude from an inner surface of the second support portion 153 to the gap space GS between the vibration member 100 and the support member 140.

[0126] The device according to an embodiment of the disclosure can include a panel connecting member (or a connecting member) instead of the middle frame 150.

[0127] The panel connecting member can be disposed between the rear edge of the vibration member 100 and the front edge of the support member 140, and thus the panel connecting member can provide the gap space GS between the vibration member 100 and the support member 140. The panel connecting member can be disposed between the rear edge of the vibration member 100 and the front edge of the support member 140 and can attach the vibration member 100 on the support member 140. For example, the panel connecting member can be implemented with a double-sided tape, a single-sided tape, or a double-sided adhesive foam pad, but embodiments of the disclosure are not limited thereto. For example, an adhesive layer of the panel connecting member can include an epoxy, an acryl-based, a silicone, or a urethane, but embodiments of the disclosure are not limited thereto. For example, in order to minimize the transmission of vibration of the vibration member 100 to the support member 140, the adhesive layer of the panel connecting member can include an acryl-based and a urethane-based material having a relatively ductile property compared to the acryl-based. Thus, the vibration of the vibration member 100 transmitted to the support member 140 can be minimized.

[0128] According to another embodiment of the disclosure, in the device according to an embodiment of the disclosure, the middle frame 150 can be omitted. A panel connecting member or an adhesive can be provided instead of the middle frame 150. According to another embodiment of the disclosure, a partition can be provided instead of the middle frame 150.

[0129] Figure 3 FIG. 1 is a perspective view illustrating a vibration device 200 according to an embodiment of the disclosure, Figure 4 is a cross-sectional view taken along a line B-B' of FIG. 1, and Figure 3 is a perspective view illustrating a vibration portion according to an embodiment of the disclosure. Figures 5A to 5E Referring to

[0130] , Figure 3 , Figure 4As shown in Figure 5, the vibration device 200 according to the embodiments of this disclosure may be referred to as a flexible vibration structure material, a flexible vibrator, a flexible vibration generating device, a flexible vibration generator, a flexible sound generator, a flexible sound device, a flexible sound generating device, a flexible sound generator, a flexible actuator, a flexible loudspeaker, a flexible piezoelectric loudspeaker, a membrane actuator, a membrane-type piezoelectric composite actuator, a membrane loudspeaker, a membrane-type piezoelectric loudspeaker, or a membrane-type piezoelectric composite loudspeaker, but the terminology is not limited thereto.

[0131] The vibration device 200 according to embodiments of the present disclosure may include a vibration portion 210a, a first electrode portion 210b, and a second electrode portion 210c.

[0132] The vibrating portion 210a may include a piezoelectric material (or electroactive material) exhibiting a piezoelectric effect. For example, the piezoelectric material may possess the following properties: pressure or distortion of the crystal structure by external force; generation of a potential difference due to dielectric polarization caused by changes in the relative positions of positive (+) ions and negative (-) ions; and generation of vibration by an electric field based on a voltage applied thereto. The vibrating portion 210a may be referred to by terms such as vibrating layer, piezoelectric layer, piezoelectric material layer, electroactive layer, vibrating portion, piezoelectric material portion, electroactive portion, piezoelectric structural material, piezoelectric composite layer, piezoelectric composite material, or piezoelectric ceramic composite material, but the terminology is not limited thereto. The vibrating portion 210a may include a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material, and may be transparent, semi-transparent, or opaque.

[0133] like Figure 5A As shown, the vibration portion 210a according to an embodiment of the present disclosure may include a plurality of first portions 210a1 and a plurality of second portions 210a2. For example, the plurality of first portions 210a1 and the plurality of second portions 210a2 may be arranged alternately and repeatedly in a first direction X (or a second direction Y). For example, the first direction X may be the width direction of the vibration portion 210a and the second direction Y may be the length direction of the vibration portion 210a that intersects the first direction X, but the embodiments of the present disclosure are not limited thereto, and the first direction X may be the length direction of the vibration portion 210a and the second direction Y may be the width direction of the vibration portion 210a.

[0134] Each of the plurality of first portions 210a1 may include an inorganic material portion. The inorganic material portion may include a piezoelectric material, a composite piezoelectric material, or an electroactive material having a piezoelectric effect.

[0135] Each of the plurality of first portions 210a1 can include a ceramic-based material for generating a relatively high vibration, or can include a piezoelectric ceramic having a perovskite-based crystal structure. The perovskite crystal structure can have a piezoelectric effect and / or a converse piezoelectric effect, and can be a plate-like structure having an orientation. The perovskite crystal structure can be represented by a chemical formula "ABO3". In the chemical formula, "A" can include a divalent metal element, and "B" can include a tetravalent metal element. For example, in the chemical formula "ABO3", "A" and "B" can be cations, and "O" can be an anion. For example, the first portion 210a1 can include one or more of lead(II) titanate (PbTiO3), lead zirconate (PbZrO3), lead zirconate titanate (PbZrTiO3), barium titanate (BaTiO3), and strontium titanate (SrTiO3).

[0136] According to an embodiment of the disclosure, the vibration portion 210a can include one or more materials of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto.

[0137] The vibration portion 210a according to another embodiment of the disclosure can include a single crystal ceramic and / or a polycrystal ceramic. The single crystal ceramic can be a material in which single crystal domains having a specific structure are regularly arranged. The polycrystal ceramic can include irregular particles in which various crystal domains are provided.

[0138] According to another embodiment of the disclosure, the vibration portion 210a can include a lead zirconate titanate (PZT)-based material including lead (Pb), zirconium (Zr), and titanium (Ti), or can include a lead zirconate nickel niobate (PZNN)-based material including lead (Pb), zirconium (Zr), nickel (Ni), and niobium (Nb), but embodiments of the disclosure are not limited thereto. According to another embodiment of the disclosure, the vibration portion 210a can include one or more of calcium titanate (CaTiO3), BaTiO3, and SrTiO3, each of which does not include Pb, but embodiments of the disclosure are not limited thereto.

[0139] Each of the plurality of first portions 210a1 according to the embodiments of the disclosure can be disposed between two adjacent second portions 210a2 of the plurality of second portions 210a2, and in addition, each of the plurality of first portions 210a1 can have a first width W1 parallel to the first direction X (or the second direction Y) and can have a length parallel to the second direction Y (or the first direction X). Each of the plurality of second portions 210a2 can have a second width W2 parallel to the first direction X (or the second direction Y) and can have a length parallel to the second direction Y (or the first direction X). The first width W1 can be the same as or different from the second width W2. For example, the first width W1 can be greater than the second width W2. For example, the first portions 210a1 and the second portions 210a2 can include linear or bar shapes having the same size or different sizes. Accordingly, the vibration portion 210a can have a 2-2 composite structure having a piezoelectric characteristic of a 2-2 vibration mode, and thus can have a resonance frequency of 20 kHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration portion 210a can vary based on one or more of a shape, a length, and a thickness.

[0140] In the vibration portion 210a, the plurality of first portions 210a1 and the plurality of second portions 210a2 can be disposed (or arranged) in parallel on the same plane (or the same layer). Each of the plurality of second portions 210a2 can be configured to fill a gap between two adjacent first portions 210a1, and thus each of the plurality of second portions 210a2 can be connected to or attached on the adjacent first portions 210a1. Accordingly, the vibration portion 210a can extend a desired size or length based on the lateral coupling (or connection) of the first portions 210a1 and the second portions 210a2.

[0141] In the vibration portion 210a, the width W2 of each of the plurality of second portions 210a2 can gradually decrease in a direction from a central portion of the vibration portion 210a or the vibration device 210 to two edge portions (or both ends) thereof.

[0142] According to embodiments of the present disclosure, when the vibrating portion 210a or the vibrating device 210 vibrates in the vertical direction Z (or the thickness direction), the second portion 210a2 of the plurality of second portions 210a2 having the largest width W2 can be disposed on a portion on which the largest stress is concentrated. When the vibrating portion 210a or the vibrating device 210 vibrates in the vertical direction Z, the second portion 210a2 of the plurality of second portions 210a2 having the smallest width W2 can be disposed at a portion at which the relatively smallest stress occurs. For example, the second portion 210a2 of the plurality of second portions 210a2 having the largest width W2 can be disposed at a central portion of the vibrating portion 210a, and the second portion 210a2 of the plurality of second portions 210a2 having the smallest width W2 can be disposed at two edge portions of the vibrating portion 210a. Accordingly, when the vibrating portion 210a or the vibrating device 210 vibrates in the vertical direction Z, interference or overlapping of resonance frequencies of sound waves occurring at a portion on which the largest stress is concentrated can be minimized, and thus a decrease in a sound pressure level occurring in a low sound high sound band can be reduced. For example, flatness of a sound characteristic can be a magnitude of a deviation between a highest sound pressure level and a lowest sound pressure level.

[0143] In the vibrating portion 210a, the plurality of first portions 210a1 can have different sizes (or widths). For example, the size (or width) of each of the plurality of first portions 210a1 can gradually decrease or increase in a direction from a central portion of the vibrating portion 210a or the vibrating device 210 to two edge portions (or both ends) thereof. Accordingly, the sound pressure level characteristics of sound of the vibrating portion 210a can be enhanced by various unique vibration frequencies based on vibration of the plurality of first portions 210a1 having different sizes, and a reproduction frequency band of sound can be extended.

[0144] Each of the plurality of second portions 210a2 can be disposed between the plurality of first portions 210a1. Accordingly, in the vibrating portion 210a or the vibrating device 210, vibration energy based on linking in a unit lattice of the first portion 210a1 can be increased through the second portion 210a2, and thus vibration characteristics can be increased and piezoelectric characteristics and flexibility can be ensured. For example, the second portion 210a2 can include one of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, but embodiments of the present disclosure are not limited thereto.

[0145] Each of the plurality of second portions 210a2 according to the embodiments of the disclosure can be configured with an organic material portion. For example, the organic material portion can be disposed between two adjacent inorganic material portions, and thus, can absorb an impact applied to the inorganic material portion (or the first portion) and can release stress concentrated on the inorganic material portion, thereby improving durability of the vibration portion 210a or the vibration device 210 and achieving flexibility of the vibration portion 210a or the vibration device 210.

[0146] The second portion 210a2 according to the embodiments of the disclosure can have a modulus and a viscoelasticity lower than those of the first portion 210a1, and thus, the second portion 210a2 can improve reliability of the first portion 210a1 vulnerable to impact damage due to the fragile characteristics of the first portion 210a1. For example, the second portion 210a2 can include a material having a loss coefficient of about 0.01 to about 1 and a modulus of about 0.1 [GPa] to about 10 [GPa].

[0147] The organic material portion included in the second portion 210a2 can include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having flexible characteristics compared to the inorganic material portion as the first portion 210a1. For example, the second portion 210a2 can be referred to as an adhesive portion, a flexible portion, a bending portion, a damping portion, or a ductile portion, etc., but the embodiments of the disclosure are not limited thereto.

[0148] The plurality of first portions 210a1 and the plurality of second portions 210a2 can be disposed on (or connected to) the same plane, and thus the vibration portion 210a according to the present embodiment can have a single membrane form. For example, the vibration portion 210a can have a structure in which the plurality of first portions 210a1 is connected to one side thereof. For example, the vibration portion 210a can have a structure in which the plurality of first portions 210a1 is connected throughout the vibration portion 210a. For example, the vibration portion 210a can vibrate in a vertical direction by the first portion 210a1 having a vibration characteristic, and can be bent into a curved shape by the second portion 210a2 having flexibility. Also, in the vibration portion 210a according to the present embodiment, the size of the first portion 210a1 and the size of the second portion 210a2 can be set based on a piezoelectric characteristic and flexibility required for the vibration portion 210a or the vibration device 210. For example, in the vibration portion 210 in which a piezoelectric characteristic is required rather than flexibility, the size of the first portion 210a1 can be set to be greater than the size of the second portion 210a2. In another embodiment of the present disclosure, in the vibration portion 210a in which flexibility is required rather than a piezoelectric characteristic, the size of the second portion 210a2 can be set to be greater than the size of the first portion 210a1. Thus, the size of the vibration portion 210a can be adjusted based on a desired characteristic, and thus the vibration portion 210a can be easily designed.

[0149] The first electrode portion 210b can be disposed on a first surface (or an upper surface) of the vibration portion 210a. The first electrode portion 210b can be collectively disposed on or coupled to the first surface of each of the plurality of first portions 210a1 or the first surface of each of the plurality of second portions 210a2, and can be electrically connected to the first surface of each of the plurality of first portions 210a1. For example, the first electrode portion 210b can have a single electrode form disposed on the entire first surface of the vibration portion 210a. For example, the first electrode portion 210b can have substantially the same shape as the vibration portion 210a, but embodiments of the present disclosure are not limited thereto.

[0150] The first electrode portion 210b according to an embodiment of the present disclosure can include a transparent conductive material, a semi-transparent conductive material, or an opaque conductive material. For example, the transparent conductive material or the semi-transparent conductive material can include indium tin oxide (ITO) or indium zinc oxide (IZO), but embodiments of the present disclosure are not limited thereto. The opaque conductive material can include aluminum (Al), copper (Cu), gold (Au), molybdenum (Mo), magnesium (Mg), or an alloy thereof, but embodiments of the present disclosure are not limited thereto.

[0151] The second electrode portion 210c can be disposed on a second surface (or a rear surface) of the vibration portion 210a different from (or opposite to) the first surface. The second electrode portion 210c can be collectively disposed on or coupled to the second surface of each of the plurality of first portions 210a1 or the second surface of each of the plurality of second portions 210a2, and can be electrically connected to the second surface of each of the plurality of first portions 210a1. For example, the second electrode portion 210c can have a single electrode form disposed on the entire second surface of the vibration portion 210a. For example, the second electrode portion 210c can have the same shape as the vibration portion 210a, but embodiments of the disclosure are not limited thereto. The second electrode portion 210c according to an embodiment can include a transparent conductive material, a translucent conductive material, or an opaque conductive material. For example, the second electrode portion 210c can include the same material as that of the first electrode portion 210b, but embodiments of the disclosure are not limited thereto. As another example, the second electrode portion 210c can include a different material from that of the first electrode portion 210b.

[0152] The vibration portion 210a can be polarized by applying a specific voltage to the first electrode portion 210b and the second electrode portion 210c in a specific temperature environment or a temperature environment varying from a high temperature to a room temperature, but embodiments of the disclosure are not limited thereto. For example, the vibration portion 210a can contract and expand alternately and repeatedly based on a converse piezoelectric effect according to a sound signal (or a voice signal) applied from the outside to the first electrode portion 210b and the second electrode portion 210c, and thus, the vibration portion 210a can vibrate. For example, by using the first electrode portion 210b and the second electrode portion 210c, the vibration portion 210a can vibrate based on a vertical direction vibration d 33 and a planar direction vibration d 31 The displacement of the vibration member (or a vibration plate or a vibration object) can be increased based on the contraction and expansion of the vibration portion 210a in the planar direction, and thus, the vibration can be more enhanced.

[0153] The vibration device 210 according to an embodiment of the disclosure can further include a first cover member 210d and a second cover member 210e.

[0154] The first cover member 210d can be disposed on the first surface of the vibration device 210. For example, the first cover member 210d can be configured to cover the first electrode portion 210b. Thus, the first cover member 210d can protect the first electrode portion 210b.

[0155] The second cover member 210e can be disposed on a second surface of the vibration device 210. For example, the second cover member 210e can be configured to cover the second electrode portion 210c. Accordingly, the second cover member 210e can protect the second electrode portion 210c.

[0156] Each of the first cover member 210d and the second cover member 210e according to the embodiments of the disclosure can include one or more materials among plastic, fiber, and wood, but the embodiments of the disclosure are not limited thereto. For example, the first cover member 210d and the second cover member 210e can include the same material or different materials. For example, the first cover member 210d and the second cover member 210e can be a polyimide film or a polyethylene terephthalate film, but the embodiments of the disclosure are not limited thereto.

[0157] The first cover member 210d according to the embodiments of the disclosure can be connected or coupled to the first electrode portion 210b by using the first adhesive layer 210f. For example, the first cover member 210d can be connected or coupled to the first electrode portion 210b by a film lamination process using the first adhesive layer 210f.

[0158] The second cover member 210e according to the embodiments of the disclosure can be connected or coupled to the second electrode portion 210c by using the second adhesive layer 210g. For example, the second cover member 210e can be connected or coupled to the second electrode portion 210c by a film lamination process using the second adhesive layer 210g.

[0159] The first adhesive layer 210f can be disposed between the first electrode portion 210b and the first cover member 210d. The second adhesive layer 210g can be disposed between the second electrode portion 210c and the second cover member 210e. For example, the first adhesive layer 210f and the second adhesive layer 210g can be disposed between the first cover member 210d and the second cover member 210e to surround the vibration portion 210a, the first electrode portion 210b, and the second electrode portion 210c. For example, the first adhesive layer 210f and the second adhesive layer 210g can be disposed between the first cover member 131d and the second cover member 131e to completely surround the vibration portion 210a, the first electrode portion 210b, and the second electrode portion 210c. For example, the vibration portion 210a, the first electrode portion 210b, and the second electrode portion 210c can be embedded or inlaid between the first adhesive layer 210f and the second adhesive layer 210g.

[0160] Each of the first adhesive layer 210f and the second adhesive layer 210g according to an embodiment of the disclosure can include an electrically insulating material having an adhesive property and capable of compression and decompression. For example, each of the first adhesive layer 210f and the second adhesive layer 210g can include an epoxy resin, an acrylic resin, a silicone resin, and a urethane resin, but embodiments of the disclosure are not limited thereto.

[0161] One of the first cover member 210d and the second cover member 210e can be adhered or coupled to the vibration member (or vibration plate or vibration object) by using an adhesive member.

[0162] According to an embodiment of the disclosure, one of the first cover member 210d and the second cover member 210e can be adhered or coupled to the vibration member (or vibration plate or vibration object) by using an adhesive member.

[0163] The vibration device 210 according to an embodiment of the disclosure can further include a first power supply line PL1 disposed in the first cover member 210d, a second power supply line PL2 disposed in the second cover member 210e, and a pad portion 210p electrically connected to the first power supply line PL1 and the second power supply line PL2.

[0164] The first power supply line PL1 can be disposed between the first electrode portion 210b and the first cover member 210d and can be electrically connected to the first electrode portion 210b. The first power supply line PL1 can extend long in the second direction Y and can be electrically connected to a central portion of the first electrode portion 210b. In an embodiment, the first power supply line PL1 can be electrically connected to the first electrode portion 210b by using an anisotropic conductive film. In another embodiment, the first power supply line PL1 can be electrically connected to the first electrode portion 210b by a conductive material (or particle) included in the first adhesive layer 210f.

[0165] The second power supply line PL2 can be disposed between the second electrode portion 210c and the second cover member 210e and can be electrically connected to the second electrode portion 210c. The second power supply line PL2 can extend long in the second direction Y and can be electrically connected to a central portion of the second electrode portion 210c. In an embodiment, the second power supply line PL2 can be electrically connected to the second electrode portion 210c by using an anisotropic conductive film. In another embodiment, the second power supply line PL2 can be electrically connected to the second electrode portion 210g by a conductive material (or particle) included in the second adhesive layer 210g.

[0166] The pad portion 210p can be disposed at one edge portion of one of the first cover member 210d and the second cover member 210e so as to be electrically connected to one side (or one end) of each of the first power supply line PL1 and the second power supply line PL2.

[0167] The pad portion 210p according to the embodiment of the disclosure can include a first pad electrode electrically connected to one end of the first power supply line PL1 and a second pad electrode electrically connected to one end of the second power supply line PL2.

[0168] The first pad electrode can be disposed at one edge portion of one of the first cover member 210d and the second cover member 210e and can be connected to one end of the first power supply line PL1. For example, the first pad electrode can pass through one of the first cover member 210d and the second cover member 210e and can be electrically connected to one end of the first power supply line PL1.

[0169] The second pad electrode can be disposed in parallel with the first pad electrode and can be connected to one end of the second power supply line PL2. For example, the second pad electrode can pass through one of the first cover member 210d and the second cover member 210e and can be electrically connected to one end of the second power supply line PL2.

[0170] According to the embodiment of the disclosure, each of the first power supply line PL1, the second power supply line PL2, and the pad portion 210p can be configured to be transparent, translucent, or opaque.

[0171] The pad portion 210p according to the embodiment of the disclosure can be electrically connected to the vibration signal connection member 300 (or a vibration signal cable).

[0172] The vibration signal connection member 300 can be electrically connected to the pad portion 210p disposed in the vibration device 210 and can provide a vibration driving signal (or a sound signal) provided from a sound processing circuit to the vibration device 210. The vibration signal connection member 300 according to the embodiment can include a first terminal electrically connected to the first pad electrode of the pad portion 210p and a second terminal electrically connected to the second pad electrode of the pad portion 210p.

[0173] The vibration signal connection member 300 according to the embodiment of the disclosure can be implemented as a film type (e.g., a chip on film (COF)) in which a signal line is disposed and can be electrically connected to the pad portion 210p by using a tape automated bonding (TAB) type bonding (or coupling). For example, the vibration signal connection member 300 can include a wire layer, a lower film coupled to a first surface of the wire layer by using an adhesive, an upper film coupled to a second surface of the wire layer by using an adhesive, and a first terminal and a second terminal and a plurality of contact pads disposed on the upper film and connected to the wire layer.

[0174] The line layer can include a base film, a plurality of signal lines formed on one or more of a front surface and a bottom surface of the base film, and a first driving signal supply line and a second driving signal supply line formed on one or more of the front surface and the bottom surface of the base film. For example, the plurality of signal lines and the first and second driving signal supply lines can include a conductive material including Cu, Al, Ag, or an alloy material of Cu and Ag, but embodiments of the present disclosure are not limited thereto.

[0175] Each of the plurality of contact pads can be disposed on one of the lower film and the upper film and can be selectively connected to the plurality of signal lines and the first and second driving signal supply lines through a via.

[0176] The first and second terminals can be electrically connected to first and second pad electrodes of a pad portion 210p disposed in the vibration device 210, respectively.

[0177] In another embodiment, the vibration signal connection member 300 can be configured in a form in which the first and second power supply lines PL1 and PL2 extend together with some elements of the vibration device 210, for example, the first and second cover members 210d and 210e. In another embodiment, the vibration signal connection member 300 can be a signal cable, and can be configured as a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible printed circuit board (PCB), a flexible multilayer printed circuit, or a flexible multilayer PCB, but embodiments of the present disclosure are not limited thereto. For example, the signal cable can be configured to be transparent, translucent, or opaque.

[0178] The sound processing circuit can generate an alternating current (AC) vibration driving signal including a first vibration driving signal and a second vibration driving signal based on sound data provided from the external sound data generation circuit. The first vibration driving signal can be one of a positive (+) vibration driving signal and a negative (-) vibration driving signal, and the second vibration driving signal can be one of the positive (+) vibration driving signal and the negative (-) vibration driving signal. For example, the first vibration driving signal can be supplied to the first electrode portion 210b through the first terminal of the vibration signal connection member 300, the first pad electrode of the pad portion 210p, and the first power supply line PL1. The second vibration driving signal can be supplied to the second electrode portion 210c through the second terminal of the vibration signal connection member 300, the second pad electrode of the pad portion 210p, and the second power supply line PL2.

[0179] According to an embodiment, the vibration signal connection member 300 can be configured to be transparent, translucent, or opaque.

[0180] The vibration device 210 according to the embodiment of the disclosure can be implemented as a thin film type because the first portions 210a1 having piezoelectric properties and the second portions 210a2 having flexibility are alternately repeated and connected, and thus, the vibration device 210 can be bent into a shape corresponding to a shape of a vibration member or a vibration object. For example, when the vibration device 210 is connected or coupled to a vibration member including various curved portions by using the connection member 250 (or an adhesive member), the vibration device 210 can be bent into a curved shape along a shape of the curved portions of the vibration member 210, and a reduction in reliability caused by damage or breakage can not occur even when the vibration device 210 is bent into the curved shape.

[0181] Figures 5B to 5E is a perspective view illustrating a vibration portion according to an embodiment of the disclosure.

[0182] Referring to Figure 5B , the vibration portion 210a according to another embodiment of the disclosure can include a plurality of first portions 210a1 spaced apart from each other in a first direction X and a second direction Y, and a second portion 210a2 disposed between the plurality of first portions 210a1.

[0183] The plurality of first portions 210a1 can be arranged to be spaced apart from each other in each of the first direction X and the second direction Y. For example, the plurality of first portions 210a1 can be arranged in a lattice form to have a hexahedral shape having the same size. Each of the plurality of first portions 210a1 can include a piezoelectric material substantially the same as the piezoelectric material of the first portion 210a1 described above with reference to Figure 3 and Figure 4 and Figure 5A The same reference numerals denote the same elements and a repeated description thereof is omitted.

[0184] The second portion 210a2 can be arranged between the plurality of first portions 210a1 in each of the first direction X and the second direction Y. The second portion 210a2 can be configured to fill a gap between two adjacent first portions 210a1 or surround each of the plurality of first portions 210a1, and thus, the second portion 210a2 can be connected or adhered to the adjacent first portions 210a1. According to the embodiment of the disclosure, a width of the second portion 210a2 disposed between two first portions 210a1 adjacent to each other in the first direction X can be the same as or different from a width of the first portion 210a1, and a width of the second portion 210a2 disposed between two first portions 210a1 adjacent to each other in the second direction Y can be the same as or different from a width of the first portion 210a1. The second portion 210a2 can include a piezoelectric material substantially the same as the piezoelectric material of the first portion 210a1 described above with reference to Figure 3 and Figure 4 andFigure 5A The piezoelectric material of the second portion 210a2 described above is substantially the same piezoelectric material as the piezoelectric material of the first portion 210a1. Thus, the same reference numerals denote the same elements and repetitive description thereof is omitted.

[0185] As described above, the vibration portion 210a according to another embodiment of the disclosure can have a 1-3 composite structure having a piezoelectric characteristic of a 1-3 vibration mode, and thus, the vibration portion 210a can have a resonance frequency of 30 MHz or less, but embodiments of the disclosure are not limited thereto. For example, the resonance frequency of the vibration portion 210a can vary based on one or more of a shape, a length, and a thickness.

[0186] Referring to Figure 5C The vibration portion 210a according to another embodiment of the disclosure can include a plurality of first portions 210a1 spaced apart from each other in the first direction X and the second direction Y, and a second portion 210a2 disposed between the plurality of first portions 210a1.

[0187] Each of the plurality of first portions 210a1 can have a circular planar structure. For example, each of the plurality of first portions 210a1 can have a circular plate shape, but embodiments of the disclosure are not limited thereto. For example, each of the plurality of first portions 210a1 can have a dot shape, such as an elliptical shape, a polygonal shape, or a circular ring shape. Each of the plurality of first portions 210a1 can include a piezoelectric material as described above with reference to Figure 3 . Figure 4 and Figure 5A The piezoelectric material of the first portion 210a1 described above is substantially the same piezoelectric material as the piezoelectric material of the second portion 210a2. Thus, the same reference numerals denote the same elements and repetitive description thereof is omitted.

[0188] The second portion 210a2 can be disposed between the plurality of first portions 210a1 in each of the first direction X and the second direction Y. The second portion 210a2 can be configured to surround each of the plurality of first portions 210a1, and thus, the second portion 210a2 can be connected or adhered to a side surface of each of the plurality of first portions 210a1. Each of the plurality of first portions 210a1 and the second portion 210a2 can be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 210a2 can include an organic material as described above with reference to Figure 3 , Figure 4 and Figure 5A The organic material of the second portion 210a2 described above is substantially the same organic material as the organic material of the first portion 210a1. Thus, the same reference numerals denote the same elements and repetitive description thereof is omitted.

[0189] Referring to Figure 5DIn the vibration device 210 according to another embodiment of the disclosure, the vibration portion 210a can include a plurality of first portions 210a1 spaced apart from each other in the first direction X and the second direction Y, and a second portion 210a2 disposed between the plurality of first portions 210a1.

[0190] Each of the plurality of first portions 210a1 can have a triangular planar structure. For example, each of the plurality of first portions 210a1 can have a triangular plate shape. Each of the plurality of first portions 210a1 can include a piezoelectric material substantially the same as the piezoelectric material of the first portion 210a1 described above with reference to Figure 3 、 Figure 4 and Figure 5A The same reference numerals denote the same elements and repetitive description thereof is omitted.

[0191] According to an embodiment of the disclosure, four adjacent first portions 210a1 of the plurality of first portions 210a1 can be arranged adjacent to each other to form a quadrilateral shape (or a square shape). A vertex of each of the four adjacent first portions 210a1 forming the quadrilateral shape can be disposed adjacent to a central portion (or a middle portion) of the quadrilateral shape.

[0192] The second portion 210a2 can be arranged between the plurality of first portions 210a1 in each of the first direction X and the second direction Y. The second portion 210a2 can be configured to surround each of the plurality of first portions 210a1, and thus, the second portion 210a2 can be connected or adhered to a side surface of each of the plurality of first portions 210a1. Each of the plurality of first portions 210a1 and the second portion 210a2 can be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 210a2 can include an organic material substantially the same as the organic material of the second portion 210a2 described above with reference to Figure 3 、 Figure 4 and Figure 5A The same reference numerals denote the same elements and repetitive description thereof is omitted.

[0193] Referring to Figure 5E In the vibration device 210 according to another embodiment of the disclosure, the vibration portion 210a can include a plurality of first portions 210a1 spaced apart from each other in the first direction X and the second direction Y, and a second portion 210a2 disposed between the plurality of first portions 210a1.

[0194] Each of the plurality of first portions 210a1 can have a triangular planar structure. For example, each of the plurality of first portions 210a1 can have a triangular plate shape. Each of the plurality of first portions 210a1 can include a piezoelectric material substantially the same as the piezoelectric material of the first portion 210a1 described above with reference to Figure 3 、 Figure 4 and Figure 5A Thus, the same reference numerals denote the same elements and repetitive description thereof will be omitted.

[0195] According to an embodiment of the disclosure, six adjacent first portions 210a1 of the plurality of first portions 210a1 can be arranged adjacent to each other to form a hexagonal shape (or a regular hexagonal shape). A vertex of each of the six adjacent first portions 210a1 forming the hexagonal shape can be disposed adjacent to a central portion (or a middle portion) of the hexagonal shape.

[0196] The second portion 210a2 can be arranged between the plurality of first portions 210a1 in each of the first direction X and the second direction Y. The second portion 210a2 can be configured to surround each of the plurality of first portions 210a1, and thus, the second portion 210a2 can be connected or adhered to a side surface of each of the plurality of first portions 210a1. Each of the plurality of first portions 210a1 and the second portion 210a2 can be disposed (or arranged) in parallel on the same plane (or the same layer). The second portion 210a2 can include an organic material substantially the same as the organic material of the second portion 210a2 described above with reference to Figure 3 、 Figure 4 and Figure 5A Thus, the same reference numerals denote the same elements and repetitive description thereof will be omitted.

[0197] Figure 6 shows a vibration device according to another embodiment of the disclosure, Figure 7 is a cross-sectional view taken along a line C-C' of Figure 6 , and Figure 8 is a cross-sectional view taken along a line D-D' of Figure 6 . Figures 6 to 8 shows an embodiment achieved by modifying the vibration signal connecting member of the vibration device shown in Figures 3 to 5E Thus, hereinafter, other elements except for the vibration signal connecting member and related elements are designated with the same reference numerals, and repetitive description thereof will be omitted or will be briefly given.

[0198] Referring to Figures 6 to 8 , the vibration device 200 according to another embodiment of the disclosure can include a vibration generating portion and a vibration signal connecting member 300'.

[0199] The vibration generating portion can include a vibration portion 210a, a first electrode portion 210b, and a second electrode portion 210c. The vibration generating portion can be substantially the same as the vibration device 210 described above with reference to Figures 3 to 5E Thus, the same reference numerals denote the same elements and a repeated description thereof is omitted.

[0200] The vibration signal connecting member 300' can be configured in a form in which the first power supply line PL1 and the second power supply line PL2 extend together with some elements of the vibration device 210, for example, the first cover member 210d and the second cover member 210e. For example, the vibration signal connecting member 300' can be electrically connected to the first electrode portion 210b and the second electrode portion 210c at one side of the vibration device 210, and thus, the vibration signal connecting member 300' can be provided in one body with the vibration generating portion. For example, the vibration signal connecting member 300' can not pass through the pad portion described above with reference to Figures 3 to 5E and can be electrically connected to the first electrode portion 210b and the second electrode portion 210c.

[0201] The vibration signal connecting member 300' according to another embodiment of the disclosure can include a first power supply extension line PL1' and a second power supply extension line PL2'. For example, the first power supply extension line PL1' can extend from the first power supply line PL1 disposed between the first cover member 210d and the first electrode portion 210b of the vibration portion 210a. The first power supply extension line PL1' can be a protruding line provided in one body with the first power supply line PL1. The second power supply extension line PL2' can extend from the second power supply line PL2 disposed between the second cover member 210e and the second electrode portion 210c of the vibration portion 210a. The second power supply extension line PL2' can be a protruding line provided in one body with the second power supply line PL2. For example, each of the first power supply extension line PL1' and the second power supply extension line PL2' can be referred to as a protruding electrode, an extension electrode, a finger line, or a finger electrode, but embodiments of the disclosure are not limited thereto.

[0202] The vibration signal connection member 300' according to another embodiment of the disclosure can include a first power supply extension line PL1', a second power supply extension line PL2', a first cover extension member 210d', and a second cover extension member 210e'. For example, the first cover extension member 210d' can cover the first power supply extension line PL1' or the second power supply extension line PL2', and the first cover extension member 210d' extends from the first cover member 210d of the vibration part 210a and is exposed outside the vibration part 210a. The first cover extension member 210d' can be a protruding film provided in one body with the first cover member 210d. The second cover extension member 210e' can cover the first power supply extension line PL1' or the second power supply extension line PL2', and the second cover extension member 210e' extends from the second cover member 210e of the vibration part 210a and is exposed outside the vibration part 210a. The second cover extension member 210e' can be a protruding film provided in one body with the second cover member 210e.

[0203] The vibration signal connection member 300' can further include a line layer between the first cover extension member 210d' and the second cover extension member 210e'. Each of the first power supply extension line PL1' and the second power supply extension line PL2' can be electrically connected to each of the first driving signal supply line and the second driving signal supply line provided in the line layer, or can extend or protrude in parallel with the first driving signal supply line and the second driving signal supply line.

[0204] The vibration signal connection member 300' according to another embodiment of the disclosure can extend from the vibration device 210 in an integrated structure and can have a function of a signal cable, and in addition, the vibration signal connection member 300' can directly supply a vibration driving signal to each of the first electrode part 210b and the second electrode part 210c through the first power supply extension line PL1' and the second power supply extension line PL2'. Accordingly, a voltage drop caused by a surface resistance characteristic of each of the first electrode part 210b and the second electrode part 210c can be reduced, an electrical characteristic of each of the first electrode part 210b and the second electrode part 210c can be supplemented, and a selection freedom degree of a conductive material used in the first electrode part 210b and the second electrode part 210c can be increased.

[0205] The first cover extension member 210d' can extend from one side of the first cover member 210d. For example, the first cover extension member 210d' can be configured to cover the first power supply extension line PL1' extending from the vibration device 210. Accordingly, the first cover member 210d and the first cover extension member 210d' can protect the first electrode part 210b, the first power supply line PL1, and the first power supply extension line PL1'.

[0206] The second cover extension member 210e' can extend from one side of the second cover member 210e. For example, the second cover extension member 210e' can be configured to cover the second power supply extension line PL2' extending from the vibration device 210. Accordingly, the second cover member 210e and the second cover extension member 210e' can protect the second electrode portion 210c, the second power supply line PL2, and the second power supply extension line PL2'.

[0207] Each of the first cover extension member 210d' and the second cover extension member 210e' according to another embodiment of the disclosure can include one or more materials among plastic, fiber, and wood, but embodiments of the disclosure are not limited thereto. For example, the first cover extension member 210d' and the second cover extension member 210e' can include the same material or different materials. For example, each of the first cover extension member 210d' and the second cover extension member 210e' can include the same material as or different material from that of the first cover member 210d and the second cover member 210e. For example, each of the first cover extension member 210d' and the second cover extension member 210e' can be a polyimide film or a polyethylene terephthalate film, but embodiments of the disclosure are not limited thereto.

[0208] Each of the first cover extension member 210d' and the second cover extension member 210e' according to another embodiment of the disclosure can be electrically insulated from the first power supply extension line PL1' and the second power supply extension line PL2' by using the first adhesive layer 210f and the second adhesive layer 210g, and thus one or more of the first cover extension member 210d' and the second cover extension member 210e' can include a metal film or a metal plate including a metal material. Each of the first cover extension member 210d' and the second cover extension member 210e' including a metal material can enhance the mass of the vibration device 210 or the vibration portion 210a to lower the resonance frequency of the vibration structure material based on the increase in the mass, thereby improving the sound characteristic and / or the sound pressure level characteristic of the sound generated based on the vibration of the vibration device 210 or the vibration portion 210a. For example, each of the first cover extension member 210d' and the second cover extension member 210e' including a metal material can include one or more materials among stainless steel, aluminum, magnesium alloy, magnesium-lithium alloy, and aluminum alloy, but embodiments of the disclosure are not limited thereto.

[0209] Each of the first adhesive layer 210f and the second adhesive layer 210g according to an embodiment of the disclosure can include an electrically insulating material having an adhesive property and capable of compression and decompression. For example, each of the first adhesive layer 210f and the second adhesive layer 210g can include an epoxy resin, an acrylic resin, a silicone resin, and a urethane resin, but embodiments of the disclosure are not limited thereto.

[0210] As described above, in the vibration device 210 according to another embodiment of the disclosure, the patterning process of forming the pad portions in the cover members 210d, 210e, 210d', and 210e' based on the integrated structure between the electrode portions 210b and 210c and the first and second power supply extension lines PL1' and PL2' of the vibration signal connection member 300', and the soldering process between the pad portions and the separate signal cable can not be needed, and thus the structure and the manufacturing process can be simplified.

[0211] Figure 9 An apparatus according to an embodiment of the disclosure is illustrated, Figure 10 An area F of Figure 9 is illustrated, Figure 11 An area F of Figure 9 is illustrated, and Figure 12 is a cross-sectional view taken along a line G-G' of Figure 11 .

[0212] Referring to Figures 9 to 12 , an apparatus according to an embodiment of the disclosure can include a vibration device 200 disposed on a rear surface of a display panel 100, a pad portion PP, a vibration signal connection member 300, and a pad connection member 400.

[0213] The pad connection member 400 can be connected to the pad portion PP. The pad connection member 400 can be connected to the pad portion PP at one end thereof and can be electrically connected to the vibration device 200 at the other end thereof. The vibration device 200 can be connected to the pad connection member 400 through the vibration signal connection member 300 and can be electrically connected to the pad portion PP. For example, the pad connection member 400 can electrically connect the pad portion PP to the vibration signal connection member 300, and thereby can transmit a vibration driving signal from the pad portion PP to the vibration signal connection member 300 to provide the vibration driving signal to the vibration device 200.

[0214] The display panel 100 can include a first substrate 110, a pixel array portion 120, a second substrate 130, a pad portion PP, and a pad connection member 400. The pixel array portion 110 can be disposed on the first substrate 110. The first substrate 110 can be a display substrate, but the term is not limited thereto. The second substrate 130 can be disposed on the pixel array portion 120. The second substrate 130 can be a backplane or a package substrate, but the term is not limited thereto.

[0215] The pad portion PP can be disposed in the non-display area IA of the first substrate 110. The pad portion PP can include a plurality of display signal pads PDd and a plurality of vibration signal pads PDv. For example, the plurality of display signal pads PDd can be arranged in parallel at an edge of the display panel 100. For example, the plurality of vibration signal pads PDv can be arranged in parallel at an edge of the display panel 100. For example, the plurality of display signal pads PDd and the plurality of vibration signal pads PDv can not be electrically connected to each other and can be disposed to be electrically disconnected from each other. For example, the plurality of display signal pads PDd and the plurality of vibration signal pads PDv can be arranged in parallel at an edge of the display panel 100.

[0216] The number of the plurality of vibration signal pads PDv can be set to be less than the number of the display signal pads PDd. For example, the plurality of display signal pads PDd can be mainly disposed in the pad portion PP, and the plurality of vibration signal pads PDv can be disposed at one edge or the other edge of the pad portion PP or can be disposed some between the plurality of display signal pads PDd.

[0217] The pad portion PP can be disposed to be a plurality of pad portions, the plurality of pad portions being respectively disposed at a plurality of positions spaced apart from each other along an edge of the display panel 100.

[0218] The plurality of display signal pads PDd can be disposed in each of the plurality of pad portions PP. For example, the plurality of display signal pads PDd can be disposed in all of the plurality of pad portions PP, or can be disposed in all of the pad portions PP except at least some of the plurality of pad portions PP.

[0219] The plurality of vibration signal pads PDv can be disposed in only some of the plurality of pad portions PP. For example, the plurality of vibration signal pads PDv can be disposed in the pad portions PP disposed in the outer area of the display panel 100. For example, the plurality of vibration signal pads PDv can be disposed in each of the pad portions PP arranged in symmetry with respect to the first direction X at the left end and the right end of the display panel 100. The plurality of vibration signal pads PDv can be disposed in the pad portions PP arranged in symmetry with respect to the first direction X at the center between the center and the left end and at the center between the center and the right end of the display panel 100. The plurality of vibration signal pads PDv can be disposed in the pad portion disposed at the center of the display panel 100 with respect to the first direction X. As another example, the plurality of vibration signal pads PDv can be disposed in some of the plurality of pad portions PP arranged along an edge of the display panel 100.

[0220] Referring to Figure 10According to an embodiment of the disclosure, the pad connection member 400 can be connected to the plurality of vibration signal pads PDv. The pad connection member 400 can be connected to the plurality of vibration signal pads PDv at one end thereof, and the other end thereof can extend along an edge of the display panel 100. For example, the pad connection member 400 can be connected to the plurality of vibration signal pads PDv at one end thereof, and the other end thereof can extend along the non-display area IA of the display panel 100 and can be disposed in the non-display area IA. For example, the pad connection member 400 can be disposed on the first substrate 110 of the display panel 100. The pad portion PP can be disposed on the first substrate 110 of the display panel 100, the pad connection member 400 can be connected to the pad portion PP on the first substrate 110 at one end thereof, and the other end thereof can extend along an edge of the first substrate 110 and can be disposed on the first substrate 110. For example, the pad connection member 400 can be disposed not to overlap the second substrate 130 in the display panel 100. The pad connection member 400 can be disposed in a region on the first substrate 110 of the display panel 100 not to overlap the second substrate 130.

[0221] According to an embodiment of the disclosure, as shown in FIG. 4A, the pad connection member 400 can be configured with a plurality of pad connection line patterns electrically connected to the plurality of vibration signal pads PDv, respectively. Figure 10 For example, the plurality of vibration signal pads PDv can receive a vibration driving signal supplied from the outside. The vibration driving signal can be supplied to the vibration device 200 through the vibration signal pads PDv. The pad connection member 400 can be connected to the vibration signal pads PDv and can transfer the vibration driving signal to the vibration device 200. The pad connection member 400 can not be directly connected to the vibration device 100. The pad connection member 400 can be connected to the vibration signal pads PDv at one end thereof, and the other end thereof can be disposed to extend up to a region adjacent to the vibration device 200.

[0222] Referring again to FIG. 4A, Figure 9According to embodiments of this disclosure, the pad connection member 400 can be connected at one end to pad portions PP located near the left and right corners of the lower end of the display panel 100. The pad connection member 400 can also be connected at one end to pad portions PP located near the left and right corners of the lower end of the first substrate 110. The pad connection member 400 can also be connected at one end to a vibration signal pad PDv of the pad portion PP. For example, the pad connection member 400 can be connected at one end to the pad portion PP, and its other end can extend from the left and right corners of the lower end of the display panel 100 along the edge of the display panel 100, and can be positioned adjacent to vibration devices 200-1 and 200-2 located on the rear surface (or back side surface) of the display panel 100. The pad connection member 400 can be connected to the pad portion PP at one end, and its other end can extend along the edge of the display panel 100 from the left and right corners of the lower end of the first substrate 110 of the display panel 100, and can be arranged adjacent to the vibration devices 200-1 and 200-2 disposed on the rear surface (or back side surface) of the display panel 100.

[0223] like Figure 9 As shown, vibration devices 200-1 and 200-2 can be disposed at the upper end of the display panel 100 about the second direction Y (or longitudinal direction). Vibration devices 200-1 and 200-2 can be arranged laterally and symmetrically about the first direction X of the display panel 100, wherein the center of the upper end of the display panel 100 is located between vibration devices 200-1 and 200-2. Vibration devices 200-1 and 200-2 can be disposed on the second substrate 130 of the display panel 100. Pad connection member 400 can extend along the edge of the display panel 100 from the pad portions PP disposed at the left and right sides of the lower edge of the display panel 100, so that the other end of the pad connection member 400 can be disposed at the upper edge of the display panel 100 adjacent to vibration devices 200-1 and 200-2. For example, in Figure 9 The diagram shows a pad connection member 400 extending from the left side of the lower end of the display panel 100 and a solder plate connection member 400 extending from the right side of the lower end of the display panel 110. However, the embodiments of this disclosure are not limited to this. The pad connection member 400 can extend from the pad portion PP on the left side of the lower end of the display panel 100 along the edge of the display panel 100 and can be configured to be connected in a ring to the pad portion PP on the right side of the lower end of the display panel 100.

[0224] Reference Figure 11 and Figure 12According to embodiments of the present disclosure, the vibration devices 200-1 and 200-2 can be connected to the pad connection member 400 through the vibration signal connection member 300. For example, the vibration signal connection member 300 can be connected to the pad portion 210P of each of the vibration devices 200-1 and 200-2. The vibration signal connection member 300 can be connected to the pad connection member 400. The vibration devices 200-1 and 200-2 can be electrically connected to the pad connection member 400 connected to the pad portion PP and extended through the vibration signal connection member 300. The vibration devices 200-1 and 200-2 can receive the vibration driving signal applied through the pad portion PP through the pad connection member 400 and the vibration signal connection member 300. For example, the vibration driving signal can be supplied from the sound processing circuit to the pad portion PP, the pad portion PP can be connected to the pad connection member 400, the vibration signal connection member 300 can be connected to the pad connection member 400, and the vibration signal connection member 300 can be connected to the vibration devices 200-1 and 200-2, and thus, the vibration devices 200-1 and 200-2 can be electrically connected to the pad portion PP and can receive the vibration driving signal supplied from the sound processing circuit.

[0225] The vibration signal connection member 300 can be connected to the pad portion 210P of each of the vibration devices 200-1 and 200-2 at one end thereof, and the other end thereof can be connected to the pad connection member 400. The vibration signal connection member 300 can be disposed on the second substrate 130 of the display panel 100. The vibration signal connection member 300 can be disposed on the first substrate 110 of the display panel 100. For example, the vibration signal connection member 300 can extend from the vibration devices 200-1 and 200-2 disposed on the second substrate 130 of the display panel 100 to the pad connection member 400 disposed on the first substrate 110 of the display panel 100. The vibration signal connection member 300 according to an embodiment can include a first terminal electrically connected to a first pad electrode of the pad portion 210P of each of the vibration devices 200-1 and 200-2 and a second terminal electrically connected to a second pad electrode of the pad portion 210P.

[0226] The vibration signal connection member 300 according to an embodiment of the present disclosure can be implemented as a film type (e.g., chip on film (COF)) in which a signal line is disposed and can be connected to the pad portion 210p by using a tape automated bonding (TAB) type bonding (or coupling) and electrically. For example, the vibration signal connection member 300 can include a wire layer, a lower film coupled to a first surface of the wire layer by using an adhesive, an upper film coupled to a second surface of the wire layer by using an adhesive, and a plurality of contact pads disposed on the upper film and connected to the wire layer and a first terminal and a second terminal.

[0227] The wire layer can include a base film, a plurality of signal lines formed on one or more of a front surface and a bottom surface of the base film, and a first driving signal supply line and a second driving signal supply line formed on one or more of the front surface and the bottom surface of the base film. For example, the plurality of signal lines and the first and second driving signal supply lines can include a conductive material including Cu, Al, Ag, or an alloy material of Cu and Ag, but embodiments of the present disclosure are not limited thereto.

[0228] Each of the plurality of contact pads can be disposed on one of the lower film and the upper film and can be selectively connected to the plurality of signal lines and the first and second driving signal supply lines through the via hole. The first and second terminals can be electrically connected to first and second pad electrodes of the pad portion 210P disposed in the vibration device 210, respectively.

[0229] The vibration signal connection member 300' according to another embodiment of the present disclosure can be configured in a form in which the first and second power supply lines PL1 and PL2 extend together with some elements of the vibration device 210, for example, the first and second cover members 210d and 210e. For example, the vibration signal connection member 300' can be electrically connected to the first and second electrode portions 210b and 210c at one side of the vibration device 210, and thus, the vibration signal connection member 300' can be disposed in one body with the vibration generation portion. For example, the vibration signal connection member 300' can not pass through the pad portion described above with reference to FIG. 10 and can be electrically connected to the first and second electrode portions 210b and 210c. Figures 3 to 5E

[0230] The vibration signal connection member 300' can include first and second power supply extension lines PL1' and PL2'. For example, the first power supply extension line PL1' can extend from the first power supply line PL1 disposed between the first cover member 210d and the first electrode portion 210b of the vibration portion 210a. The first power supply extension line PL1' can be a protruding line disposed in one body with the first power supply line PL1. The second power supply extension line PL2' can extend from the second power supply line PL2 disposed between the second cover member 210e and the second electrode portion 210c of the vibration portion 210a. The second power supply extension line PL2' can be a protruding line disposed in one body with the second power supply line PL2. For example, each of the first and second power supply extension lines PL1' and PL2' can be referred to as a protruding electrode, an extension electrode, a finger line, or a finger electrode, but embodiments of the present disclosure are not limited thereto.

[0231] ​The vibration signal connection member 300' can include the first power supply extension line PL1', the second power supply extension line PL2', the first cover extension member 210d', and the second cover extension member 210e'. For example, the first cover extension member 210d' can cover the first power supply extension line PL1' or the second power supply extension line PL2', and the first cover extension member 210d' extends from the first cover member 210d of the vibration portion 210a and is exposed outside the vibration portion 210a. The first cover extension member 210d' can be a protruding film provided in one body with the first cover member 210d. The second cover extension member 210e' can cover the first power supply extension line PL1' or the second power supply extension line PL2', and the second cover extension member 210e' extends from the second cover member 210e of the vibration portion 210a and is exposed outside the vibration portion 210a. The second cover extension member 210e' can be a protruding film provided in one body with the second cover member 210e.

[0232] The vibration signal connection member 300' can further include a wire layer between the first cover extension member 210d' and the second cover extension member 210e'. Each of the first power supply extension line PL1' and the second power supply extension line PL2' can be electrically connected to each of the first driving signal supply line and the second driving signal supply line provided in the wire layer, or can extend or protrude in parallel with each of the first driving signal supply line and the second driving signal supply line.

[0233] The vibration signal connection member 300' can extend from the vibration device 210a in an integrated structure and can have a function of a signal cable, and in addition, the vibration signal connection member 300' can directly supply the vibration driving signal to each of the first electrode portion 210b and the second electrode portion 210c through the first power supply extension line PL1' and the second power supply extension line PL2'. Accordingly, a voltage drop caused by a surface resistance characteristic of each of the first electrode portion 210b and the second electrode portion 210c can be reduced, an electrical characteristic of each of the first electrode portion 210b and the second electrode portion 210c can be supplemented, and a selection freedom degree of a conductive material used in the first electrode portion 210b and the second electrode portion 210c can be increased.

[0234] In another embodiment of the disclosure, the vibration signal connection member 300 can be a signal cable, and can be configured as a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible PCB, a flexible multilayer printed circuit, or a flexible multilayer PCB, but embodiments of the disclosure are not limited thereto.

[0235] Referring again to Figure 11 and Figure 12According to an embodiment of the disclosure, the vibration signal connection member 300 can include a first signal line 311 connected to the first power line PL1 of the vibration part 210a, a second signal line 312 connected to the second power line PL2 of the vibration part 210a, and a body part 310 surrounding the first signal line 311 and the second signal line 312. The body part 310 can be formed in a film type in which the first signal line 311 and the second signal line 312 are disposed. For example, the body part 310 can be a polyimide film or a polyethylene terephthalate film. Alternatively, the body part 310 can be configured as a flexible printed circuit cable, a flexible flat cable, a single-sided flexible printed circuit, a single-sided flexible PCB, a flexible multi-layer printed circuit, or a flexible multi-layer PCB, but embodiments of the disclosure are not limited thereto. As another example, the vibration signal connection member 300 can be configured as a first power extension line PL1' extending from the first power line PL1 of the vibration part 210a, a second power extension line PL2' extending from the second power line PL2 of the vibration part 210a, and first and second cap extension members 210d' and 210e' extending from the first and second cap members 210d and 210e are replaced by the first and second signal lines 311 and 312 and the body part 310.

[0236] For example, the vibration signal connection member 300 can be bonded (or adhered) and coupled to the pad part 210p of the vibration device 200, with one end of the vibration signal connection member 300 disposed on the second substrate 130. The vibration signal connection member 300 can be disposed to extend on the second substrate 130 in a direction in which the pad connection member 400 is arranged, cover a side surface of the second substrate 130, and extend on the first substrate 110 until and overlap the pad connection member 400. The vibration signal connection member 300 can be bonded (or adhered) and coupled to the pad connection member 400. The resin 350 can be disposed at a contact portion between the vibration signal connection member 300 and the pad connection member 400.

[0237] According to an embodiment of the disclosure, the vibration device 200 of the device can be electrically connected to the pad part PP disposed in the display panel 100 through the signal connection member 300 and the pad connection member 400. Because the vibration driving signal (or sound signal) from the sound processing circuit can be supplied to the vibration device 200 of the device through the signal connection member disposed in the display panel 100, a hole for exposing a wire can not be separately provided in the back plate, and a bridge PCB for connecting the wire can not be separately provided, thus the process can be simplified, the assembly of the display device can be enhanced, the degree of freedom of the design of the device can be enhanced, and because the number of parts is reduced and the process is simplified based on the simplification, the manufacturing cost of the device can be reduced.

[0238] Figure 13 An apparatus according to another embodiment of the present disclosure is shown. Figure 14 An apparatus according to another embodiment of the present disclosure is shown, and Figure 15 An apparatus according to another embodiment of the present disclosure is shown. Figures 13 to 15 It shows how to modify Figure 9 The illustrated embodiment is achieved through the arrangement of the vibration devices in the apparatus. Therefore, in the following text, elements other than those associated with the arrangement of the vibration devices are referred to by the same reference numerals, and their repeated descriptions are omitted or will be briefly given.

[0239] Reference Figure 13 According to another embodiment of the present disclosure, vibration devices 200-3 and 200-4 can be disposed at the middle end of the display panel 100 about the second direction Y (or longitudinal direction). Vibration devices 200-3 and 200-4 can be arranged laterally symmetrical about the center of the middle end of the display panel 100 about the first direction X of the display panel 100. Vibration devices 200-3 and 200-4 can be disposed on the second substrate 130 of the display panel 100. Pad connection member 400 can extend along the edge of the display panel 100 from pad portions PP disposed on the left and right sides of the lower edge of the display panel 100, and the other end of pad connection member 400 can be disposed at the edge of the middle end of the display panel 100 adjacent to vibration devices 200-3 and 200-4. Vibration devices 200-3 and 200-4 can be connected to pad connection member 400 disposed at the edge of the middle end of the display panel 100 via vibration signal connection member 300. For example, in Figure 13 The diagram shows a pad connection member 400 extending from the left side of the lower end of the display panel 100 and a pad connection member 400 extending from the right side of the lower end of the display panel 110. However, the embodiments of this disclosure are not limited to this. The pad connection member 400 can extend from the pad portion PP on the left side of the lower end of the display panel 100 along the edge of the display panel 100 and can be configured to be connected in a ring to the pad portion PP on the right side of the lower end of the display panel 100.

[0240] Reference Figure 14, the vibration devices 200-5 and 200-6 of the device according to another embodiment of the disclosure can be disposed at the lower end of the display panel 100 with respect to the second direction Y (or the longitudinal direction). The vibration devices 200-5 and 200-6 can be arranged to be laterally symmetrical to the center of the lower end of the display panel 100 with respect to the first direction X of the display panel 100. The vibration devices 200-5 and 200-6 can be disposed on the second substrate 130 of the display panel 100. The pad connection members 400 can extend from the pad portions PP disposed at the left and right sides of the lower edge of the display panel 100 in a direction toward the center of the display panel 100, and the other ends of the pad connection members 400 can be disposed at the edges of the lower end of the display panel 100 adjacent to the vibration devices 200-5 and 200-6. The vibration devices 200-5 and 200-6 can be connected to the pad connection members 400 disposed at the edges of the lower end of the display panel 100 through the vibration signal connection members 300. For example, in Figure 14 , the pad connection member 400 extending from the left side of the lower end of the display panel 100 is disconnected from the pad connection member 400 extending from the right side of the lower end of the display panel 110, but embodiments of the disclosure are not limited thereto, and the pad connection member 400 can be disposed to be linearly connected from the pad portion PP at the left side of the lower end of the display panel 100 until the right side of the lower end of the display panel 100.

[0241] Referring to Figure 15, the vibration devices 200-1 to 200-6 of the device according to another embodiment of the disclosure can be disposed at the upper end, the middle end, and the lower end of the display panel 100 with respect to the second direction (or the longitudinal direction). The vibration devices 200-1 to 200-6 can be arranged to be laterally symmetrical to the center of the display panel 100 with respect to the first direction of the display panel 100. The vibration devices 200-1 to 200-6 can be radially arranged with respect to the vertical and horizontal center of the display panel 100. The vibration devices 200-1 to 200-6 can be disposed on the second substrate 130 of the display panel 100. The pad connection member 400 can extend along the left and right edges of the display panel 100 from the pad portions PP disposed at the left and right sides of the lower edge of the display panel and adjacent to the vibration device 200-3 and the vibration device 200-4. The other end of the pad connection member 400 can be disposed at the upper edge of the display panel 100 adjacent to the vibration devices 200-1 and 200-2. In addition, the pad connection member 400 can extend in a direction toward the center of the display panel 100 from the pad portions PP disposed at the left and right sides of the lower edge of the display panel 100, and the other end of the pad connection member 400 can be disposed at the edge of the lower end of the display panel 100 adjacent to the vibration devices 200-1 and 200-2. Each of the vibration devices 200-1 to 200-6 can be connected to the pad connection member 400 through the vibration signal connection member 300. For example, in Figure 15 , the pad connection member 400 extending from the left side of the lower end of the display panel 100 is disconnected from the pad connection member 400 extending from the right side of the lower end of the display panel 100, but embodiments of the disclosure are not limited thereto, and the pad connection member 400 can be disposed to be connected in a closed loop form traveling around the entire edge of the display panel 100 from the pad portions PP at the left and right sides of the display panel 100. In addition, it has been described that the pad portions PP are disposed at the left and right edges of the lower end of the display panel 100, but embodiments of the disclosure are not limited thereto, and the pad portions PP can be disposed at the edges of the lower center of the display panel 100 and the pad connection member 400 can extend in the left direction or the right direction from the edges of the lower center of the display panel 100, the pad connection member 400 can travel around the edges of the display panel 100, and can be disposed to be connected again in a closed loop form until the edges of the lower center of the display panel 100.

[0242] Figure 16 a device according to another embodiment of the disclosure is shown, and Figure 17 is a cross-sectional view taken along Figure 16 line H-H'. Figure 16 and Figure 17 the source PCB 50 and the control board 70 are added to Figure 15Embodiments of the illustrated device. Accordingly, in the following, other elements than the source PCB 50, the control board 70 and related elements are referred to with the same reference numerals and repetitive description thereof is omitted or will be given shortly.

[0243] Referring to Figure 16 and Figure 17 Among them, the device according to another embodiment of the disclosure can include vibration devices 200-1 to 200-6 arranged on the rear surface of the display panel 100, a pad portion PP, a vibration signal connection member 300, a pad connection member 400, a source PCB 50, and a control board 70.

[0244] The source PCB 50 can be connected to the pad portion PP through the flexible film 30. The driving IC 40 can be disposed on the flexible film 30. For example, the flexible film 30 can be connected to the pad portion PP. The source PCB 50 can be disposed at one side of the display panel 100. For example, the source PCB 50 can be connected to the flexible film 30.

[0245] The cable 60 can be connected to the source PCB 50. The signal transmission line 31 can be disposed in the flexible film 30. For example, the flexible film 30 can include the signal transmission line 30 connected to the pad portion PP. For example, the pad connection member 400 can be connected to the signal transmission line 31 through or by the pad portion PP. The signal transmission line 31 can be connected to the source PCB 50. The source PCB 50 can be connected to the cable 60. For example, the pad connection member 400 can be connected to the cable 60 through the pad portion PP and the source PCB 50. In addition, the resin 160 can be disposed at one side of the flexible film 30.

[0246] The control board 70 can be disposed on a rear surface of the display panel 100. The control board 70 can include a timing controller 75 and a sound processing circuit 80. For example, the sound processing circuit 80 can be embedded into the control board 70. A vibration driving signal (or a sound signal) provided from the sound processing circuit 80 can be supplied to the vibration device 200. For example, the vibration driving signal provided from the sound processing circuit 80 can be transmitted to the source PCB 50 through the cable 60, and the vibration driving signal transmitted to the source PCB 50 can be transmitted to the pad connection member 400 through the pad portion PP and the signal transmission line 31 of the flexible film 30. The pad connection member 400 can be connected to the vibration signal connection member 300 of the vibration device 200. Accordingly, the vibration driving signal can be applied to the vibration device 200. For example, the vibration driving signal provided from the sound processing circuit 80 can be connected to the pad connection member 400 through the cable 60, the pad portion PP, and the signal transmission line 31 of the flexible film 30 and the source PCB 50, and the vibration signal connection member 300 can be connected to the pad connection member 400. Accordingly, the vibration driving signal can be applied to the vibration device 200.

[0247] The vibration device according to the embodiments of the disclosure can be applied to a vibration device disposed in a device. The device according to the embodiments of the disclosure can be applied to a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, a rollable device, a bendable device, a flexible device, a curved device, a portable multimedia player (PMP), a personal digital assistant (PDA), an electronic organizer, a desktop personal computer (PC), a laptop PC, a netbook computer, a workstation, a navigation device, a car navigation device, a car display device, a television (TV), a wallpaper display device, an identification device, a game console, a notebook computer, a monitor, a camera device, a camcorder, a home appliance, etc. Further, the vibration device according to the disclosure can be applied to an organic light emitting illumination device or an inorganic light emitting illumination device. In the case where the vibration device is applied to the illumination device, the vibration device can function as an illumination device and a speaker. Further, in the case where the vibration device according to the disclosure is applied to the mobile device, the vibration device can be one or more of a speaker, a receiver, or a haptic device, but the embodiments of the disclosure are not limited thereto.

[0248] A device according to the embodiments of the disclosure will be described below.

[0249] A device according to the embodiments of the disclosure includes a vibration member including a pad portion, a vibration device that vibrates the vibration member, a pad connection member connected to the pad portion, and a vibration signal connection member that connects the vibration device to the pad connection member.

[0250] According to some embodiments of the present disclosure, the vibration device can be electrically connected to the pad portion through the pad connection member.

[0251] According to some embodiments of the present disclosure, the vibration device can be electrically connected to the pad portion through the vibration signal connection member and the pad connection member.

[0252] According to some embodiments of the present disclosure, the vibration device can not directly contact the pad connection member.

[0253] According to some embodiments of the present disclosure, the vibration device can be electrically connected to the pad connection member through the vibration signal connection member.

[0254] According to some embodiments of the present disclosure, the vibration member can include a first vibration member at which the pad portion is disposed, and a second vibration member at which the vibration device is disposed, the second vibration member being located on the first vibration member.

[0255] According to some embodiments of the present disclosure, the pad connection member can be located on the first vibration member.

[0256] According to some embodiments of the present disclosure, the vibration signal connection member can be located on the second vibration member.

[0257] According to some embodiments of the present disclosure, the vibration signal connection member can be located on the first vibration member and the second vibration member.

[0258] According to some embodiments of the present disclosure, the vibration device can include a vibration portion, a first electrode portion on a first surface of the vibration portion, and a second electrode portion on a second surface of the vibration portion.

[0259] According to some embodiments of the present disclosure, the vibration signal connection member can be electrically connected to each of the first electrode portion and the second electrode portion.

[0260] According to some embodiments of the present disclosure, the vibration device can include a first cover member covering the first electrode portion, a second cover member covering the second electrode portion, a first power supply wire disposed between the first electrode portion and the first cover member and electrically connected to the first electrode portion, and a second power supply wire disposed between the second electrode portion and the second cover member and electrically connected to the second electrode portion, and the vibration signal connection member can be electrically connected to each of the first power supply wire and the second power supply wire.

[0261] According to some embodiments of the present disclosure, the vibration signal connection member can be formed by extensions of the first power supply wire and the second power supply wire and the first cover member and the second cover member.

[0262] According to some embodiments of the present disclosure, the vibration member can include one or more materials among metal, plastic, fiber, leather, wood, cloth, paper, and glass.

[0263] According to some embodiments of the present disclosure, the vibration member can include one among a display panel including pixels displaying an image, an illumination panel, a sign panel, and a mirror.

[0264] According to some embodiments of the present disclosure, the vibration member can include a display panel including pixels displaying an image, or one among an interior material of a vehicle, a window of a vehicle, a ceiling of a building, an interior material of a building, a window of a building, an interior material of an aircraft, and a window of an aircraft.

[0265] According to some embodiments of the present disclosure, the vibration device can include two or more vibration means.

[0266] According to another embodiment of the present disclosure, a device includes a display panel displaying an image and including a pad portion, a vibration device vibrating the display panel, a pad connection member connected to the pad portion, and a vibration signal connection member between the vibration device and the pad connection member.

[0267] According to some embodiments of the present disclosure, the display panel can include a first substrate, a pixel array portion on the first substrate, and a second substrate on the pixel array portion.

[0268] According to some embodiments of the present disclosure, the pad portion can be on the first substrate, and the pad connection member can be connected to the pad portion on the first substrate.

[0269] According to some embodiments of the present disclosure, the vibration device can be on the second substrate, and the vibration signal connection member can be connected to the vibration device on the second substrate.

[0270] According to some embodiments of the present disclosure, the vibration signal connection member can be on the first substrate and the second substrate.

[0271] According to some embodiments of the present disclosure, the device can further include a flexible film connected to the pad portion, a source printed circuit board (PCB) connected to the flexible film and disposed at one side of the display panel, and a cable connected to the source PCB, and the pad connection member can be connected to the cable through the pad portion and the source PCB.

[0272] According to some embodiments of the present disclosure, the flexible film can include a signal transfer line connected to the pad portion, and the pad connection member can be connected to the signal transfer line through the pad portion.

[0273] According to some embodiments of the present disclosure, the vibration device can be electrically connected to the pad connection member through the vibration signal connection member.

[0274] According to some embodiments of the present disclosure, the display panel can include a display area displaying an image and a non-display area surrounding the display area, the pad connection member can be located in the non-display area, and the vibration signal connection member can overlap at least a portion of the display area.

[0275] The device according to the embodiments of the present disclosure can include a vibration device that vibrates the display panel or the vibration member, and thus, the structure of the signal connection line of the vibration device can be simplified and the degree of freedom of the design of the device can be improved, thereby reducing the number of parts on a simplified basis and reducing the manufacturing cost of the device on a process simplification basis.

[0276] The above-described features, structures, and effects of the present disclosure are included in at least one embodiment of the present disclosure, but are not limited to only one embodiment. Furthermore, a person skilled in the art can implement the features, structures, and effects described in at least one embodiment of the present disclosure by combining or modifying other embodiments. Therefore, what is associated with the combination and modification should be interpreted as being within the scope of the present disclosure. It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the technical idea or scope of the present disclosure. Therefore, the present disclosure is intended to cover the modifications and variations of the present disclosure, as long as they fall within the scope of the appended claims and their equivalents.

Claims

1. An apparatus including a vibration device, comprising: a vibration member including a pad portion; a pad connection member connected to the pad portion; and a vibration signal connection member connecting the vibration device to the pad connection member, wherein the vibration device vibrates the vibration member, wherein the vibration device is electrically connected to the pad connection member and to the pad portion of the vibration member through the vibration signal connection member, and wherein the vibration signal connection member is disposed in a direction perpendicular to an edge of the vibration member to which the vibration device is connected. The vibration device is electrically connected to the pad portion through the pad connection member.

2. The device comprising a vibrating device according to claim 1, wherein, The vibration device is electrically connected to the pad portion through the vibration signal connection member and the pad connection member.

3. The device comprising a vibrating device according to claim 1, wherein, The vibration device does not directly contact the pad connection member.

4. The device comprising a vibrating device according to claim 1, wherein, The vibration member includes:

5. The device comprising a vibrating device according to claim 1, wherein, a first vibration member at which the pad portion is disposed; and a second vibration member at which the vibration device is disposed, the second vibration member being located on the first vibration member. The pad connection member is located on the first vibration member.

6. The device comprising a vibrating device according to claim 5, wherein, The vibration signal connection member is located on the second vibration member.

7. The device comprising a vibrating device according to claim 5, wherein, The vibration signal connection member is located on the first vibration member and the second vibration member.

8. The device comprising a vibrating device according to claim 7, wherein, The vibration device includes:

9. The device comprising a vibrating device according to claim 1, wherein, a vibration portion; a first electrode portion located on a first surface of the vibration portion; and a second electrode portion located on a second surface of the vibration portion. The vibration signal connection member is electrically connected to each of the first electrode portion and the second electrode portion.

10. The device comprising a vibrating device according to claim 9, wherein, The vibration device includes:

11. The device comprising a vibrating device according to claim 9, wherein, a first cover member covering the first electrode portion; a second cover member covering the second electrode portion; a first power supply line disposed between the first electrode portion and the first cover member and electrically connected to the first electrode portion; and a second power supply line disposed between the second electrode portion and the second cover member and electrically connected to the second electrode portion, and The vibration signal connection member is electrically connected to each of the first power supply line and the second power supply line. The vibration signal connection member is formed by extensions of the first power supply line and the second power supply line and the first cover member and the second cover member.

12. The device comprising a vibrating device according to claim 11, wherein, The vibration member includes one or more materials among metal, plastic, fiber, leather, wood, cloth, paper, and glass.

13. The device comprising a vibrating device according to claim 1, wherein, The vibration member includes one of a display panel including pixels displaying an image, an illumination panel, a sign panel, and a mirror.

14. The device comprising a vibrating device according to claim 1, wherein, The vibration member includes a display panel including pixels displaying an image, or one of an interior material of a vehicle, a window of a vehicle, a ceiling of a building, an interior material of a building, a window of a building, an interior material of an aircraft, and a window of an aircraft.

15. The device comprising a vibrating device according to claim 1, wherein, The number of the vibration devices is two or more.

16. The device comprising a vibrating device according to claim 1, wherein, 17. An apparatus including a vibration device, comprising: a display panel displaying an image and including a pad portion; a pad connection member connected to the pad portion; and a vibration signal connection member connecting the vibration device to the pad connection member, ​ a vibration signal connecting member positioned between the vibration device and the pad connecting member, wherein the vibration device vibrates the display panel, wherein the vibration device is electrically connected to the pad connecting member and to the pad portion of the display panel through the vibration signal connecting member, and wherein the vibration signal connecting member is disposed in a direction perpendicular to an edge of the display panel to which the vibration device is connected.

18. The device comprising a vibrating device according to claim 17, wherein, The display panel includes: a first substrate; a pixel array portion on the first substrate; and a second substrate on the pixel array portion.

19. The device comprising a vibrating device according to claim 18, wherein, The pad portion is on the first substrate, and the pad connecting member is connected to the pad portion on the first substrate.

20. The device comprising a vibrating device according to claim 19, wherein, The vibration device is on the second substrate, and the vibration signal connecting member is connected to the vibration device on the second substrate.

21. A device comprising a vibrating device according to claim 20, wherein, The vibration signal connecting member is on the first substrate and the second substrate.

22. The device including a vibration device according to claim 17, further comprising: a flexible film connected to the pad portion; a source printed circuit board (PCB) connected to the flexible film and disposed at a side of the display panel; and a cable connected to the source PCB, wherein the pad connecting member is connected to the cable through the pad portion and the source PCB. The flexible film includes a signal transfer line connected to the pad portion, and 23. The device comprising a vibrating device according to claim 22, wherein, the pad connecting member is connected to the signal transfer line through the pad portion. The display panel includes a display area that displays the image and a non-display area that surrounds the display area, 24. The device comprising a vibrating device of claim 17, wherein, wherein the pad connecting member is positioned in the non-display area, and the vibration signal connecting member overlaps at least a portion of the display area.

25. A device including a vibration device, comprising: a display panel that displays an image and includes a pad portion; a pad connecting member connected to the pad portion; and a vibration signal connecting member that connects the vibration device to the pad connecting member, wherein the vibration device vibrates the display panel, wherein the vibration device is electrically connected to the pad connecting member and to the pad portion of the display panel through the vibration signal connecting member, and wherein the vibration signal connecting member is disposed in a direction perpendicular to an edge of the display panel to which the vibration device is connected. ​ ​

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