Vibration device and device including the same

Abstract

To provide: a vibration device that can vibrate a display panel to generate a sound and has an improved sound pressure characteristic; and a device including the same.SOLUTION: A vibration device comprises: a display panel 100 to display an image; a first vibration generator 230 disposed at a rear surface of the display panel 100; and a first connection member 210 disposed between the first vibration generator 230 and the display panel 100. The first vibration generator 230 includes a first vibration part 231 including multiple inorganic material portions with a piezoelectric characteristic and an organic material portion between the multiple inorganic material portions.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vibration device and a device including the same, and more particularly to a vibration device having improved vibration characteristics and a device including the same.

Background Art

[0002] A display device has to install a separate speaker to display an image on a display panel and provide sound. When arranging a speaker in the display device, — since the speaker — occupies space, there is a problem that the design and spatial arrangement of the display device are restricted.

[0003] The sound output from the speaker — travels to the rear or below the display device, so there is a problem that the sound quality deteriorates due to interference between the sounds reflected by the wall or the ground. As a result, there is a problem that accurate sound transmission is difficult, and there is a problem that the immersion feeling of the viewer or user is reduced.

Summary of the Invention

[0004] Therefore, the inventors of the present invention recognized the above-described problems and conducted several experiments to implement a vibration device capable of improving sound quality and improving sound pressure characteristics. Through several experiments, a device with a new structure including a vibration device capable of improving sound quality and improving sound pressure characteristics was invented.

[0005] The problem to be solved according to an embodiment of the present invention is to provide a vibration device capable of generating sound by vibrating a display panel and having improved sound pressure characteristics, and a device including the same.

[0006] The problem to be solved according to the embodiments of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those with ordinary knowledge in this technical field from the following description.

[0007] The vibration device according to an embodiment of the present invention includes a first vibration generator and a first connecting member disposed on a first surface of the first vibration generator. The first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts.

[0008] The vibration device according to an embodiment of the present invention includes a first vibration generator, a first connecting member disposed on a first surface of the first vibration generator, a second vibration generator disposed on a second surface opposite to the first surface of the first vibration generator and overlapping the first vibration generator, and a second connecting member disposed between the first vibration generator and the second vibration generator.

[0009] The device according to an embodiment of the present invention includes an object to be vibrated and a vibration generating device located on one surface of the object to be vibrated. The vibration device includes a first vibration generator and a first connecting member disposed on a first surface of the first vibration generator. The first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts.

[0010] Specific matters according to various examples of the present invention other than the solutions to the problems described above are included in the following description and drawings.

[0011] The device according to an embodiment of the present invention can vibrate a display panel to generate sound, and can output sound having improved sound pressure characteristics in front of the display panel.

[0012] The device according to an embodiment of the present invention can improve the characteristics of the middle frequency band, low frequency band, and / or mid-low frequency band of the sound generated by the displacement of the display panel accompanying the increase in the amplitude displacement of the display panel.

[0013] The vibration device according to an embodiment of the present invention can improve the characteristics of the bass range, lower midrange, midrange, and treble range of the sound generated by the displacement of the diaphragm.

[0014] Since the problems to be solved, the means for solving the problems, and the contents of the effects mentioned above do not specify the essential features of the scope of the claims, the scope of the rights of the claims is not limited by the matters described in the content of the invention.

Brief Description of the Drawings

[0015]

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Embodiments for Carrying Out the Invention

[0016] The advantages and features of the present invention, and the methods for achieving them, will become clear by referring to the embodiments described in detail later together with the attached drawings. However, the present invention is not limited to the embodiments disclosed below, but is realized in various different forms. Merely these embodiments are provided to complete the disclosure of the present invention and to fully inform those with ordinary knowledge in the technical field to which the present invention belongs of the scope of the invention. The technical scope of the present invention is defined only by the scope of the claims.

[0017] Throughout the figures and the specification, the same reference numerals refer to the same components. The relative sizes and descriptions of these components may be exaggerated for clarity, explanation, and convenience. The manufacturing processes and / or the progress of the processes described are illustrative. However, the manufacturing processes and / or the order of the processes are not limited to those described herein and can be changed as known in the art, except for the manufacturing stages and / or processes that necessarily occur in a specific order. The names of each component used in the following description are simply selected for the convenience of preparing the specification and may be different from the actual product.

[0018] For the purpose of explaining the embodiments of the present invention, the shapes, sizes, ratios, angles, numbers, etc. shown in the figures are illustrative and the present invention is not limited to the matters shown in the figures. Throughout the specification, the same reference signs refer to the same components. Also, in the description of the present invention, when it is determined that a specific description of related known technologies obscures the gist of the present invention unnecessarily, the detailed description thereof is omitted. When terms such as "comprising", "having", "consisting of", etc. mentioned in this specification are used, other parts can be added unless "only" is used. When a component is expressed in the singular, it includes the case of including a plurality unless otherwise explicitly stated.

[0019] When interpreting a component, it is construed to include an error range or tolerance range even if there is no separate explicit description about the error range.

[0020] When it is an explanation about the positional relationship, for example, when the positional relationship between two parts is described by "on ~", "above ~", "below ~", "beside ~", etc., one or more other parts can be located between the two parts unless "immediately" or "directly" is used.

[0021] When it comes to the description of the relationship of time, for example, when the temporal front-back relationship is described by "after ~", "subsequent to ~", "next to ~", "before ~", etc., as long as "immediately" or "directly" is not used, it can include cases that are not continuous.

[0022] The first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are merely used to distinguish one component from another. Therefore, the first component mentioned below may also be the second component within the technical idea of the present invention.

[0023] When explaining the components of the present invention, terms such as the first, second, A, B, (a), (b), etc. can be used. This term is for distinguishing the component from other components, and the nature, order, sequence, or number of the component is not limited by the term.

[0024] When a certain component is described as "connected", "coupled", or "connected" to another component, it can be directly connected or connected to the other component, but it should be understood that other components can "intervene" between the components that can be indirectly connected or connected unless otherwise explicitly stated.

[0025] The term "at least one" should be understood to include all combinations that can be presented from one or more related items. For example, the meaning of "at least one of the first item, the second item, and the third item" can include not only each of the first item, the second item, or the third item alone, but also all combinations of two or more items that can be presented from among the first item, the second item, and the third item.

[0026] In the description of the embodiments, when a structure is described as being "above or upper" or "below or lower" another structure, such description should be interpreted to include cases where the structures are in contact with each other, and also cases where a third structure is disposed therebetween. The sizes and thicknesses of the respective components shown in the figures are for convenience of explanation, and unless otherwise specifically mentioned, the embodiments of the present invention are not limited thereto.

[0027] As used herein, the "display device" can include a liquid crystal module (Liquid Crystal Module; LCM) including a display panel and a driving unit for driving the display panel, a display device such as an organic light emitting display module (OLED Module). And it can also include an electrical equipment apparatus including a notebook computer, a television, a computer monitor, a vehicle or automotive apparatus, or other forms of vehicle, which are complete products or final products including LCM, OLED modules, etc., and a set electronic apparatus or a set device or set apparatus such as a mobile electronic apparatus such as a smartphone or an electronic pad.

[0028] Therefore, the display device as used herein can include the display device itself such as LCM, OLED module, etc., and also a set device which is an application product or a final consumer device including LCM, OLED module, etc.

[0029] In some examples, an LCM or an OLED module composed of a display panel and a driving unit, etc., can be referred to as a "display device", and an electronic device as a finished product including the LCM or OLED module can be distinguished and referred to as a "set device". For example, the display device can include a liquid crystal or organic light-emitting display panel and a source PCB which is a control unit for driving the display panel. The set device can further include a set PCB which is a set control unit electrically connected to the source PCB and driving the whole set device.

[0030] The display panels used in some embodiments of the present invention can be any form of display panels such as liquid crystal display panels, organic light-emitting display panels, and electroluminescent display panels, and the embodiments are not limited thereto. For example, the display panel can be a display panel capable of generating sound by vibrating due to a vibration generating device according to some embodiments of the present invention. The display panel applied to the display device according to some embodiments of the present invention is not limited by the shape and size of the display panel.

[0031] For example, when the display panel is a liquid crystal display panel, it can include a number of gate lines and data lines, and pixels formed in the intersection regions of the gate lines and data lines. And it can be configured to include an array substrate including thin film transistors which are switching elements for adjusting the light transmittance in each pixel, an upper substrate equipped with a color filter and / or a black matrix, etc., and a liquid crystal layer formed between the array substrate and the upper substrate.

[0032] When the display panel is an organic light-emitting display panel, it can include a number of gate lines and data lines, and pixels formed in the intersection regions of the gate lines and data lines. And it can be composed of an array substrate including thin-film transistors which are elements for selectively applying voltage to each pixel, an organic light-emitting element layer on the array substrate, and a sealing substrate or an encapsulation substrate arranged on the array substrate so as to cover the organic light-emitting element layer, etc. The sealing substrate can protect the thin-film transistors and the organic light-emitting element layer from external impacts, and can prevent moisture and oxygen from penetrating into the organic light-emitting element layer. And the layers formed on the array substrate can include an inorganic light-emitting layer, for example, a nano-sized material layer, and a quantum dot light-emitting layer, etc. As another example, it can include a micro light-emitting diode.

[0033] The display panel can further include a backing or a back surface such as a metal plate attached to the display panel. It can also include other structures, for example, other structures made of other materials.

[0034] In the present invention, a device including a vibration device can be applied to a vehicle as a user interface module such as a central control panel in an automobile. For example, such a display panel can be implemented between the occupants of two front seats so that the vibration of the display panel propagates toward the inside of the vehicle. Therefore, the in-vehicle audio experience can be improved compared to the case where there are only speakers on the interior sides of the vehicle.

[0035] The features of each of some embodiments of the present invention can be partially or wholly combined or combined with each other, and various technical linkages and drives are possible, and each embodiment is independent of each other —It may be possible to implement, and it may also be possible to implement together in a related relationship.

[0036] Hereinafter, with reference to the attached drawings and examples, the embodiments of the present invention will be described in detail as follows. The scale of the components shown in the drawings has a scale different from the actual one for convenience of explanation, and thus is not limited to the scale shown in the drawings.

[0037] FIG. 1 is a diagram showing a display device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line I-I' shown in FIG. 1.

[0038] Referring to FIGS. 1 and 2, the display device of the present invention may include a display panel 100 for displaying an image and a vibration device 200 for vibrating the display panel 100 on the back surface (or the reverse side) of the display panel 100.

[0039] The display panel 100 can display an image, for example, an electronic image or a digital image (or a still image, a video image). For example, the display panel 100 can output light and display an image. The display panel 100 can be any form of display panel 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, or a curved surface display panel. The display panel 100 can be a flexible display panel. For example, the display panel 100 can be a flexible light emitting display panel, a flexible electrophoretic display panel, a flexible electronic wetting display panel, a flexible micro light emitting diode display panel, or a flexible quantum dot light emitting display panel, but is not limited thereto.

[0040] The display panel 100 according to the embodiment of the present invention may include a display area (AA) for displaying an image by driving a plurality of pixels. Further, the display panel 100 may further include a non-display area (IA) that at least partially adjacent to or surrounds the display area (AA), but is not necessarily limited thereto.

[0041] The display panel 100 according to an embodiment of the present invention can display an image in a form such as a top emission method, a bottom emission method, or a dual emission method. The display panel 100 includes an anode electrode, a cathode electrode, and a light emitting element, and may include a pixel array layer including a plurality of pixels. In the top emission method, light generated from the pixel array layer can be emitted forward of the base substrate to display an image, and in the bottom emission method, light generated from the pixel array layer can be emitted backward of the base substrate to display an image.

[0042] The display panel 100 according to an embodiment of the present invention may include a pixel array portion disposed on the display area of the substrate. The pixel array portion may include a plurality of pixels that display an image by signals supplied to signal lines. The signal lines may include gate lines, data lines, pixel driving power lines, etc., and embodiments of the present invention are not limited thereto.

[0043] Each of the plurality of pixels may include a pixel circuit layer including a driving thin film transistor provided in a pixel region formed by a plurality of gate lines and / or a plurality of data lines, an anode electrode electrically connected to the driving thin film transistor, a light emitting element formed on the anode electrode, and a cathode electrode electrically connected to the light emitting element.

[0044] The driving thin film transistor may be formed in a transistor region of each pixel region disposed on the substrate. The driving thin film transistor may include a gate electrode, a gate insulating film, a semiconductor layer, a source electrode, and a drain electrode. The semiconductor layer of the thin film transistor may include silicon such as a-Si, poly-Si, or low temperature poly-Si, or may include an oxide such as IGZO (Indium-Gallium-Zinc-Oxide), and embodiments of the present invention are not limited thereto. —

[0044]

[0045] The anode electrode (or pixel electrode) is provided in the opening region disposed in each pixel region and can be electrically connected to the driving thin film transistor.

[0046] The light emitting element according to an embodiment of the present invention may include an organic light emitting element layer formed on the anode electrode. The organic light emitting element layer may be embodied to emit the same color, for example, white light, for each pixel, or may be embodied to emit different colors, for example, red, green, or blue light, for each pixel. The cathode electrode (or common electrode) can be commonly connected to the organic light emitting element layer provided in each pixel region. For example, the organic light emitting element layer may be a single structure including the same color for each pixel or a stack structure including two or more structures. In another example, the organic light emitting element layer may be a stack 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 may be one or more of blue, red, yellow-green, and green, or may be composed of a combination thereof, but is not limited thereto. Examples of the combination include blue and red, red and yellow-green, red and green, and red / yellow-green / green, etc., and the embodiments of the present invention are not limited thereto. And it can be applied regardless of these stacking orders. The stack structure including two or more structures having the same color or one or more different colors may further include a charge generation layer between the two or more structures. The charge generation layer may be a PN junction structure and may include an N-type charge generation layer and a P-type charge generation layer.

[0047] The light-emitting element according to another example may include a micro light-emitting diode element electrically connected to each of the anode electrode and the cathode electrode. The micro light-emitting diode element may be a light-emitting diode embodied in the form of an integrated circuit (IC) or a chip. The micro light-emitting diode element may include a first terminal electrically connected to the anode electrode and a second terminal electrically connected to the cathode electrode. The cathode electrode may be commonly connected to the second terminals of the micro light-emitting diode elements provided in each pixel region.

[0048] The sealing part is formed on the substrate so as to surround the pixel array part, thereby preventing oxygen or moisture from penetrating into the light-emitting element of the pixel array part. The sealing part according to an embodiment of the present invention may be formed in a multilayer structure in which an organic material layer and an inorganic material layer are alternately laminated, and the embodiments of the present invention are not limited thereto. The inorganic material layer can block oxygen or moisture from penetrating into the light-emitting element layer of the pixel array part. The organic material layer may be formed to be relatively thicker than the inorganic material layer so as to cover foreign substances (particles) that may be generated during the manufacturing process, and the embodiments of the present invention are not limited thereto. For example, the sealing part may include a first inorganic film, an organic film on the first inorganic film, and a second inorganic film on the organic film. The organic film may be a foreign substance cover layer, and is not limited to the term. The touch panel may be disposed on the sealing part, or may be disposed on the back surface of the pixel array part or within the pixel array part.

[0049] The display panel 100 according to an embodiment of the present invention may include a first substrate, a second substrate, and a liquid crystal layer. The first substrate may be an upper substrate or a thin film transistor array substrate. For example, the first substrate may include a pixel array (or a display unit or a display region) having a plurality of pixels formed in pixel regions intersecting by a plurality of gate lines and / or a plurality of data lines. Each of the plurality of pixels may include a thin film transistor connected to a gate line and / or a data line, a pixel electrode connected to the thin film transistor, and a common electrode formed adjacent to the pixel electrode and supplied with a common voltage.

[0050] The first substrate may further include a pad portion provided at a first end (or a non-display portion) and a gate driving circuit provided at a second end (or a second non-display portion).

[0051] The pad portion can supply signals supplied from the outside to the pixel array and / or the gate driving circuit. For example, the pad portion may include a plurality of data pads connected to a plurality of data lines via a plurality of data link lines and / or a plurality of gate input pads connected to the gate driving circuit via a gate control signal line. For example, the size of the first substrate can be larger than the size of the second substrate, and the embodiments of the present invention are not limited thereto.

[0052] The gate driving circuit can be built in (or integrated) at the second end of the first substrate so as to be connected to a plurality of gate lines. For example, the gate driving circuit can be embodied as a shift register including transistors formed by the same process as the thin film transistors provided in the pixel region. According to another example, the gate driving circuit can be included in the panel driving circuit in the form of an integrated circuit without being built in the upper substrate.

[0053] The second substrate can be a lower substrate or a color filter array substrate. For example, the second substrate can include pixels that can include an opening region overlapping the pixel region formed on the first substrate, and a color filter layer formed in the opening region. The second substrate can have a size smaller than that of the first substrate, and the embodiments of the present invention are not limited thereto. For example, the second substrate can overlap the remaining portion of the first substrate except for the first end. The second substrate can be attached to the remaining portion of the first substrate except for the first end with a sealant interposing a liquid crystal layer therebetween.

[0054] The liquid crystal layer can be disposed between the first substrate and the second substrate. The liquid crystal layer can be composed of liquid crystal in which the alignment direction of liquid crystal molecules changes due to an electric field formed by a data voltage applied to a pixel electrode and a common voltage for each pixel.

[0055] The second polarizing member adheres to the lower surface of the second substrate and can polarize the light incident from the backlight and traveling through the liquid crystal layer. The first polarizing member adheres to the upper surface of the first substrate and can polarize the light transmitted through the first substrate and emitted to the outside.

[0056] The display panel 100 according to an embodiment of the present invention can display an image by the light transmitted through the liquid crystal layer by driving the liquid crystal layer by an electric field formed for each pixel by a data voltage and a common voltage applied for each pixel.

[0057] In the display panel 100 according to another embodiment of the present invention, the first substrate can be a color filter array substrate, and the second substrate can be a thin film transistor array substrate. For example, in the display panel 100 according to another embodiment of the present invention, the display panel 100 according to the embodiment can have an upside-down form. In this case, the pad portion of the display panel 100 according to another embodiment of the present invention can be blocked by a separate structure.

[0058] The display panel 100 according to still another embodiment of the present invention can be bent to have a curved form or a certain radius of curvature, or can include a bent bending portion.

[0059] The bending portion of the display panel 100 can be implemented in at least one of one side end portion and the other side end portion parallel to each other in the display panel 100. One side end and / or the other side end of the display panel 100 implementing the bending portion can include only the non-display area (IA), or can include the end of the display area (AA) and the non-display area (IA). The display panel 100 including the bending portion implemented by bending the non-display area (IA) can have a one-side bezel bending structure or a both-side bezel bending structure. And the display panel 100 including the bending portion implemented by bending the end of the display area (AA) and the non-display area (IA) can have a one-side active bending structure or a both-side active bending structure.

[0060] The vibration device 200 can provide acoustic and / or haptic feedback to the user based on the vibration of the display panel 100 by vibrating the display panel 100 on the back surface of the display panel 100. The vibration device 200 can be embodied on the back surface of the display panel 100 so as to directly vibrate the display panel 100. The back surface can be the surface of the display panel on the opposite side of the surface for displaying images, and the vibration device 200 may not be visible to the user.

[0061] As an example of the present invention, the vibration device 200 can vibrate by a vibration drive signal applied to the vibration device 200. The vibration drive signal can vibrate the display panel 100 in synchronization with the video displayed on the display panel 100. As another example, the vibration device 200 can vibrate by a haptic feedback signal (or tactile feedback signal) synchronized with a user's touch on a touch panel (or touch sensor layer) disposed on the display panel 100 or built into the display panel 100, or another signal of the display device for notifying the user, and can vibrate the display panel 100. Thereby, the display panel 100 can vibrate due to the vibration of the vibration device 200 and provide at least one or more of acoustic and haptic feedback to the user (or viewer).

[0062] The vibration device 200 according to an embodiment of the present invention can be embodied in a size corresponding to the display area (AA) of the display panel 100. The size of the vibration device 200 can be 0.9 times to 1.1 times the size of the display area (AA), and the embodiments of the present invention are not limited thereto. For example, the size of the vibration device 200 may be the same as or smaller than the size of the display area (AA). For example, since the size of the vibration device 200 can be the same as or substantially the same as the size of the display area (AA) of the display panel 100, most of the area of the display panel 100 can be covered, and the vibration generated by the vibration device 200 can vibrate the entire display panel 100, so that the sense of sound localization is high and the user satisfaction can be improved. Also, since the contact area (or panel coverage) between the display panel 100 and the vibration device 200 increases and the vibration area of the display panel 100 can increase, the sound in the mid-low frequency band generated by the vibration of the display panel 100 can be improved. And, since the vibration device 200 applied to a large display device can vibrate the entire large (or large area) display panel 100, the sense of sound localization due to the vibration of the display panel 100 is further improved, and an improved acoustic effect can be realized. Therefore, the vibration device 200 according to an embodiment of the present invention is disposed on the back surface of the display panel 100 and can vibrate the display panel 100 sufficiently in the vertical (or front-rear) direction, so that desired sound can be output in front of the device or the display device.

[0063] The vibration device 200 according to an embodiment of the present invention can have a thickness thinner than that of the display panel 100. The vibration device 200 can be embodied in a film form. Since the vibration device 200 is embodied in a film form, it can have a thickness thinner than that of the display panel 100, so that an increase in the thickness of the display device due to the arrangement of the vibration device 200 is minimized. For example, the vibration device 200 can be represented by, but is not limited to, an acoustic generation module that uses the display panel 100 as an acoustic diaphragm, an acoustic generator, a film actuator, a film-type piezoelectric composite actuator, a film speaker, a film-type piezoelectric speaker, or a film-type piezoelectric composite speaker. As another example, the vibration device 200 can be applied to a vibration object that is not a display panel. For example, the vibration object can be a non-display panel, wood, plastic, glass, cloth, an automobile interior material, an automobile glass window, a building interior ceiling, a building glass window, an aircraft interior material, and an aircraft glass window, and embodiments of the present invention are not limited thereto. For example, the non-display panel can be a light-emitting diode lighting panel (or device), an organic light-emitting lighting panel (or device), or an inorganic light-emitting lighting panel (or device), and embodiments of the present invention are not limited thereto. In this case, the vibration object can be applied as a diaphragm, and the vibration device 200 can vibrate the vibration object to output sound.

[0064] According to another example, the vibration object can include a plate, and the plate can include a metal material and / or one or more single non-metallic or composite non-metallic materials among wood, plastic, glass, fabric, and leather, and embodiments of the present invention are not limited thereto.

[0065] The vibration device 200 according to an embodiment of the present invention may include at least one or a plurality of vibration generators 230 and 270 that are superimposed on each other. The vibration device 200 may include a plurality of vibration generators 230 and 270 that are stacked or laminated so as to be displaced in the same direction as each other. For example, the vibration device 200 may include a plurality of vibration generators 230 and 270 that are stacked or laminated so as to have the same driving direction as each other.

[0066] In addition, the vibration device 200 according to another embodiment of the present invention may include a single vibration generator 230. A display device including the vibration device 200 including the single vibration generator 230 will be described later with reference to FIG. 12.

[0067] The plurality of vibration generators 230 and 270 may be superimposed or laminated on each other so as to be displaced (or driven or vibrated) in the same direction as each other. For example, each of the plurality of vibration generators 230 and 270 contracts or expands in the same driving direction (or displacement direction or vibration direction) according to a vibration drive signal in a superimposed or laminated state, so that the displacement amount (or bending force or bending resultant force) or amplitude displacement can be increased or maximized. As a result, the plurality of vibration generators 230 and 270 can improve the acoustic characteristics and sound pressure characteristics of the mid-low frequency band generated by the vibration of the display panel 100 by increasing (or maximizing) the displacement amount (or bending force or bending resultant force) or amplitude displacement of the display panel 100. For example, the plurality of vibration generators 230 and 270 can be superimposed or laminated on each other so as to have the same driving direction as each other, so that the driving force of the plurality of vibration generators 230 and 270 can be increased or maximized, and thereby the sound pressure characteristics generated in the display panel 100 by the vibration of the plurality of vibration generators 230 and 270 can be improved.

[0068] Each of the plurality of vibration generators 230 and 270 may include a piezoelectric structure (vibration part or piezoelectric vibration part) including a piezoelectric ceramic having piezoelectric properties, but embodiments of the present invention are not limited thereto. For example, each of the plurality of vibration generators 230 and 270 according to embodiments of the present invention includes piezoelectric ceramics having a perovskite crystal structure, and can vibrate (or mechanically displace) in response to an externally applied electrical signal. For example, when a vibration drive signal (or voice signal) is applied to each of the plurality of vibration generators 230 and 270, the piezoelectric structure (vibration part or piezoelectric vibration part) alternately repeats contraction and expansion due to the inverse piezoelectric effect, and the deflection direction alternately changes. Due to the deflection phenomenon, by displacing (or vibrating or driving) in the same direction as each other, the displacement amount (or bending force or bending resultant force) or amplitude displacement of the vibration device 200 or / and the display panel 100 can be increased or maximized.

[0069] Among the plurality of vibration generators 230 and 270, the first vibration generator 230 disposed on / above the display panel 100 may be a main vibration generator. For example, among the plurality of vibration generators 230 and 270, the remaining second vibration generator 270 may be at least one auxiliary vibration generator laminated on the first vibration generator 230. The second vibration generator 270 may have the same structure as the first vibration generator 230, and embodiments of the present invention are not limited thereto.

[0070] The vibration device 200 according to embodiments of the present invention may further include a first connecting member 210 disposed between the first vibration generator 230 and the display panel 100, the second vibration generator 270, and, in the case of the plurality of vibration generators 230, a second connecting member 250 disposed between the first vibration generator 230 and the second vibration generator 270.

[0071] According to embodiments of the present invention, the first connecting member 210 and the second connecting member 250 each include at least one base material and may include an adhesive layer attached to one or both surfaces of the base material.

[0072] According to an embodiment of the present invention, the first connecting member 210 and the second connecting member 250 can be made of a material including an adhesive layer having excellent adhesion or bonding strength to each of the plurality of vibrators 230 and 270. For example, the first connecting member 210 and the second connecting member 250 can include a foam pad, a double-sided tape, an adhesive, etc., and the embodiments of the present invention are not limited thereto. For example, the adhesive layer of the first connecting member 210 and the second connecting member 250 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the adhesive layer of the first connecting member 210 and the second connecting member 250 can include a urethane-based material (or material) having relatively softer characteristics than acrylic among acrylic and urethane. Thereby, vibration loss in the vibration device 200 due to displacement interference between the plurality of vibrators 230 and 270 is minimized, or each of the plurality of vibrators 230 and 270 can be displaced freely.

[0073] The adhesive layer of the first connecting member 210 and the second connecting member 250 can further include additives such as tackifiers, wax components, or antioxidants. The additives can prevent the first connecting member 210 and the second connecting member 250 from falling (or peeling) from the display panel 100 due to the vibration of the vibration device 200. For example, the tackifier can be a rosin derivative, and the wax component can be paraffin wax. For example, the antioxidant can be a phenolic antioxidant such as thioester, and the embodiments of the present invention are not limited thereto.

[0074] The second connecting member 250 according to another embodiment can include one or more of a thermosetting adhesive, a photocurable adhesive, and a heat-sealing adhesive. For example, the second connecting member 250 can include a heat-sealing adhesive. The heat-sealing adhesive can be of a heat-active type or a thermosetting type. For example, the second connecting member 250 including the heat-sealing adhesive can adhere or bond two adjacent vibrators 230 and 270 to each other by heat and pressure.

[0075] By being disposed between the display panel 100 and the vibration device 200, the first connection member 210 can connect or couple the vibration device 200 to the back surface of the display panel 100. For example, the vibration device 200 can be supported or disposed on the back surface of the display panel 100 by being connected or coupled to the back surface of the display panel 100 via the first connection member 210.

[0076] The first connection member 210 according to an embodiment of the present invention can be made of a material including an adhesive layer having excellent adhesion or adhesive force with respect to each of the back surface of the display panel 100 and the vibration device 200. For example, the first connection member 210 can include a foam pad, a double-sided tape, an adhesive, or the like, and embodiments of the present invention are not limited thereto. For example, the adhesive layer of the first connection member 210 can include epoxy, acrylic, silicone, or urethane, and embodiments of the present invention are not limited thereto. For example, the adhesive layer of the first connection member 210 can be different from the adhesive layer of the second connection member 250. For example, the adhesive layer of the first connection member 210 can include an acrylic-based material (or material) having relatively excellent adhesive force and high hardness among acrylic and urethane. Thereby, the vibration of the vibration device 200 can be well transmitted to the display panel 100.

[0077] The first connection member 210 according to another embodiment can further include a hollow portion provided between the display panel 100 and the vibration device 200. The hollow portion of the first connection member 210 can provide an air gap between the display panel 100 and the vibration device 200. The air gap can minimize the loss of vibration by the first connection member 210 by causing the sound wave (or sound pressure) accompanying the vibration of the vibration device 200 to concentrate on the display panel 100 without being dispersed by the first connection member 210, and thus can increase the sound pressure characteristics of the sound generated by the vibration of the display panel 100.

[0078] The device according to an embodiment of the present invention can further include a support member 300 disposed on the back surface of the display panel 100.

[0079] The support member 300 can cover the back surface of the display panel 100. For example, the support member 300 can cover the entire back surface of the display panel 100 with a gap space (GS) therebetween. For example, the support member 300 can include a glass material and at least one or more materials among a metal material and a plastic material or a combination thereof. For example, the support member 300 can be a back structure or a set structure. For example, the support member 300 can be expressed by other terms such as a cover bottom, a plate bottom, a back cover, a base frame, a metal frame, a metal chassis, a chassis base, or an m-chassis. Therefore, the support member 300 can be embodied in any form of a frame or a plate-like structure disposed on the back surface of the display panel 100.

[0080] The device according to an embodiment of the present invention can further include a middle frame 400.

[0081] The middle frame 400 can be disposed between the back end of the display panel 100 and the front end of the support member 300. The middle frame 400 can support one or more of the ends of the display panel 100 and the support member 300, respectively, and can surround one or more of the side surfaces of the display panel 100 and the support member 300, respectively. The middle frame 400 can provide a gap space (GS) between the display panel 100 and the support member 300. The middle frame 400 can be expressed by a middle cabinet, a middle cover, or a middle chassis, etc., and is not limited to the terms.

[0082] The middle frame 400 according to an embodiment of the present invention can include a first support portion 410 and a second support portion 430.

[0083] The first support part 410 is disposed between the rear end of the display panel 100 and the front end of the support member 300, so that a gap space (GS) can be provided between the display panel 100 and the support member 300. The front surface of the first support part 410 can be coupled or connected to the rear end surface of the support member 300 via the first frame connecting member 401. The rear surface of the first support part 410 can be coupled or connected to the front end surface of the support member 300 via the second frame connecting member 403. For example, the first support part 410 can include a single frame structure in a rectangular form or a frame structure having a plurality of divided bar forms.

[0084] The second support part 430 can be perpendicularly coupled or connected to the outer surface of the first support part 410 in parallel with the thickness direction (Z) of the device. The second support part 430 can protect the outer surfaces of the display panel 100 and the support member 300 by surrounding one or more of the outer surface of the display panel 100 and the outer surface of the support member 300. The first support part 410 can protrude toward the gap space (GS) between the display panel 100 and the support member 300 from the inner surface of the second support part 430, or can protrude toward the gap space (GS) between the display panel 100 and the support member 300.

[0085] FIG. 3 is a cross-sectional view showing a vibration generating device of a display device according to an embodiment of the present invention, and FIG. 4 is a perspective view showing the arrangement relationship between the vibration part and the base material of the first connecting member.

[0086] Referring to FIG. 3, a display device according to an embodiment of the present invention can include a vibration device 200 disposed on or below the display panel 100. The vibration device 200 can include a first connecting member 210, a first vibration generator 230, a second connecting member 250, and a second vibration generator 270.

[0087] The first vibration generator 230 according to an embodiment of the present invention can include a first vibration part 231 including a piezoelectric material, a first electrode part 233 disposed on the first surface of the first vibration part 231, and a second electrode part 235 disposed on the second surface opposite to the first surface of the first vibration part 231.

[0088] The first vibrating part 231 can include a piezoelectric material including a piezoelectric effect, a composite piezoelectric material, or an electroactive material. The first vibrating part 231 can include an inorganic material and an organic material. For example, the first vibrating part 231 can include a plurality of inorganic material parts made of a piezoelectric material and at least one organic material part made of a flexible material. For example, the first vibrating part 231 can be represented by a piezoelectric vibrating part, a piezoelectric composite layer, a piezoelectric composite body, or a piezoelectric ceramic composite body, etc., and the embodiments of the present invention are not limited thereto. Since the first vibrating part 231 can be made of a transparent, translucent, or opaque piezoelectric material, it can be transparent, translucent, or opaque. Each of the first vibrating part 231 or the first and second vibration generators 230, 270 can be represented by a flexible vibration generator, a flexible actuator, a flexible speaker, a flexible piezoelectric speaker, a film actuator, a film-type piezoelectric composite actuator, a film speaker, a film-type piezoelectric speaker, or a film-type piezoelectric composite speaker, etc., and the embodiments of the present invention are not limited thereto.

[0089] The first vibrating part 231 according to the embodiment of the present invention can include a plurality of first parts 231a and a plurality of second parts 231b. For example, the plurality of first parts 231a and the plurality of second parts 231b can be alternately and repeatedly arranged along the first direction (X) (or the second direction (Y)). For example, the first direction (X) can be the lateral direction of the first vibrating part 231, and the second direction (Y) can be the longitudinal direction of the first vibrating part 231 intersecting the first direction (X), but is not limited thereto. For example, the first direction (X) can be the longitudinal direction of the first vibrating part 231, and the second direction (Y) can be the lateral direction of the first vibrating part 231. — For example, the first direction (X) can be the longitudinal direction of the first vibrating part 231, and the second direction (Y) can be the lateral direction of the first vibrating part 231.

[0090] Each of the plurality of first portions 231a may be composed of an inorganic material portion. The inorganic material portion may include the materials described above. For example, the first portion 231a may be composed of a ceramic-based material capable of relatively high vibration embodiment, or a piezoelectric ceramic having a perovskite crystal structure. The perovskite crystal structure may have piezoelectric and inverse piezoelectric effects and may be a plate-shaped structure having orientation. The perovskite crystal structure may be represented by the chemical formula ABO 3 and the A site may consist of a divalent metal element and the B site may consist of a tetravalent metal element. As an example of the present invention, in the chemical formula of ABO 3 , the A site and the B site may be cations and O may be an anion. For example, at least one of PbTiO 3 , PbZrO 3 , PbZrTiO 3 , BaTiO 3 , and SrTiO 3 can be included, and the embodiments of the present invention are not limited thereto.

[0091] The first portion 231a according to an embodiment of the present invention may include one or more of lead (Pb), zirconium (Zr), titanium (Ti), zinc (Zn), nickel (Ni), and niobium (Nb), and the embodiments of the present invention are not limited thereto.

[0092] As another example, the first portion 231a may include a PZT (lead zirconate titanate) - based material including lead (Pb), zirconium (Zr), and titanium (Ti), or a PZNN (leadel nionate n) - based material including lead (Pb), zinc (Zn), nickel (Ni), and niobium (Nb), and is not limited thereto. Alternatively, the first portion 231a may include at least one of CaTiO 3 , BaTiO 3 , and SrTiO 3 without including lead (Pb), and the embodiments of the present invention are not limited thereto.

[0093] As another example, the first portion 231a can have a piezoelectric strain coefficient (d 33 ) of 1,000 pC / N or more in the thickness direction (Z). By having a high piezoelectric strain coefficient (d 33 ), it can be applied to a display panel with a large size, and a vibration device 200 having sufficient vibration characteristics or piezoelectric characteristics can be provided. For example, the first portion 231a is mainly composed of a PZT-based material (PbZrTiO 3 ) and can include a softner dopant material doped in the A site (Pb) and a relaxor ferroelectric material doped in the B site (ZrTi).

[0094] The softner dopant material can improve the piezoelectric and dielectric characteristics of the first portion 231a. For example, the piezoelectric strain coefficient (d 33 ) of the first portion 231a can be increased. If the softner dopant material is composed of a +1-valent element, the piezoelectric and dielectric characteristics may decrease. For example, if the softner dopant material is composed of potassium (K) or rubidium (Rb), the piezoelectric and dielectric characteristics may decrease. Therefore, through various experiments, it was recognized that the softner dopant material must be composed of +2-valent to +3-valent elements in order to improve the piezoelectric and dielectric characteristics. The softner dopant material according to an embodiment of the present invention can include +2-valent to +3-valent elements. Since a morphotropic phase boundary (MPB) can be formed by including a softner dopant material in the PZT-based material (PbZrTiO 3 ), the piezoelectric and dielectric characteristics can be improved. For example, the softner dopant material can include strontium (Sr), barium (Ba), lanthanum (La), neodymium (Nd), calcium (Ca), yttrium (Y), erbium (Er), or ytterbium (Yb). For example, ions of the softner dopant material (Sr 3 , Ba 2+ doped in the PZT-based material (PbZrTiO2+ , La 2+ , Nd 3+ , Ca 2+ , Y 3+ , Er 3+ , Yb 3+ ) can replace a part of lead (Pb) in the PZT-based material (PbZrTiO 3 ), and the replacement amount can be 2 to 20 mol%. For example, if the replacement amount is less than 2 mol% or exceeds 20 mol%, the perovskite crystal structure will collapse, so the electrical coupling coefficient (kP) and the piezoelectric strain coefficient (d 33 ) can decrease. When replacing with a soft donor dopant material, it can constitute a morphotropic phase boundary region, and the phase transition can have high piezoelectric and dielectric properties in the boundary region, so a vibration device having high piezoelectric and dielectric properties can be realized.

[0095] According to an embodiment of the present invention, a relaxor ferroelectric material doped in a PZT-based material (PbZrTiO 3 ) can improve the electrical strain characteristics of the first part 231a. The relaxor ferroelectric material according to an embodiment of the present invention can include a PMN (lead magnesium niobate)-based material or a PNN (lead nickel niobate)-based material, and the embodiments of the present invention are not limited thereto. The PMN-based material can include lead (Pb), magnesium (Mg), and niobium (Nb), for example, it can be Pb(Mg, Nb)O 3 . The PNN-based material can include lead (Pb), nickel (Ni), and niobium (Nb), for example, it can be Pb(Ni, Nb)O 3 . For example, a relaxor ferroelectric material doped in a PZT-based material (PbZrTiO 3 ) is a relaxor ferroelectric material doped in a PZT-based material (PbZrTiO 3) replace a part of zirconium (Zr) and titanium (Ti) respectively, and the replacement amount can be 5 to 25 mol%. For example, when the replacement amount is less than 5 mol% or exceeds 25 mol%, the perovskite crystal structure will collapse, so the electrocoupling coefficient (kP) and piezoelectric strain coefficient (d 33 ) may decrease.

[0096] According to an embodiment of the present invention, the first part 231a can further include a donor material doped in the B-site (ZrTi) of a PZT-based material (PbZrTiO 3 ) for further improvement of the piezoelectric coefficient. For example, the donor material doped in the B-site (ZrTi) can include elements with a valence of +4 to +6. For example, the donor material doped in the B-site (ZrTi) can include tellurium (Te), germanium (Ge), uranium (U), bismuth (Bi), niobium (Nb), tantalum (Ta), antimony (Sb), or tungsten (W).

[0097] The first part 231a according to an embodiment can be represented by the following formula.

[0098] [Formula 1] (Pb A-B C B )((Mg 1 / 3 Nb 2 / 3 ) a (Ni 1 / 3 Nb 2 / 3 ) b Zr c Ti d )O 3

[0099] In Formula 1, C can be one of calcium (Ca), strontium (Sr), and barium (Ba). a + b + c + d = 1, 0.02 ≦ B ≦ 0.80, 0.80 ≦ A - B ≦ 0.98, 0.05 ≦ a ≦ 0.25, 0.05 ≦ b ≦ 0.25, 0.10 ≦ c ≦ 0.50, 0.10 ≦ d ≦ 0.50.

[0100] The first part 231a according to an embodiment of the present invention can have a piezoelectric strain coefficient (d 33 ) of 1,000 pC / N or more in the thickness direction (Z), so that an oscillation device with improved oscillation characteristics can be implemented. For example, an oscillation device with improved oscillation characteristics can be implemented in a large-area device.

[0101] Each of the plurality of first parts 231a according to the implementation of the present invention can be arranged between a plurality of second parts 231b. The plurality of second parts 231b can be arranged (or arrayed) parallel to each other with the plurality of first parts 231a in between. Each of the plurality of first parts 231a can have a length parallel to the second direction (Y) (or the first direction (X)) while having a first width (W1) parallel to the first direction (X) (or the second direction (Y)). Each of the plurality of second parts 231b can have a length parallel to the second direction (Y) (or the first direction (X)) while having a second width (W2) parallel to the first direction (X) (or the second direction (Y)). The first width (W1) can be the same as or different from the second width (W2). Each of the plurality of second parts 231b can all have the same size, for example, width, area, or volume. For example, each of the plurality of first parts 231a can all have the same size, for example, width, area, or volume within the range of process errors (or allowable errors) generated in the manufacturing process. For example, the first width (W1) can be larger than the second width (W2). For example, the first part 231a and the second part 231b can include a line form or a stripe form having the same or different sizes from each other. Therefore, the first vibration part 231 can have a resonance frequency of 20 kHz or less by having a 2-2 composite composed of the first part 231a and the second part 231b, and the embodiments of the present invention are not limited — to this. For example, the resonance frequency of the first vibration part 231 can be changed by at least one of the form, length, and thickness, etc.

[0102] In the first vibrating part 231, each of the plurality of first parts 231a and the plurality of second parts 231b can be arranged (or arrayed) parallel to each other in the same plane (or the same layer). Each of the plurality of second parts 231b can be configured to fill a gap between two adjacent first parts 231a. Each of the plurality of second parts 231b can be connected or adhered to an adjacent first part 231a. By being configured to fill a gap between two adjacent first parts 231a, each of the plurality of second parts 231b can be connected or adhered to an adjacent first part 231a. Thereby, the first vibrating part 231 can be extended to a desired size or length by side bonding (or connection) of the first part 231a and the second part 231b.

[0103] In the first vibrating part 231, the width (W2) of each of the plurality of second parts 231b can decrease from the middle part of the first vibrating part 231 toward both end parts (or both tips).

[0104] According to an embodiment of the present invention, the second part 231b having the largest width (W2) among the plurality of second parts 231b can be located at a portion where the largest stress is concentrated when the first vibrating part 231 vibrates in the vertical direction (Z) (or the thickness direction). The second part 231b having the smallest width (W2) among the plurality of second parts 231b can be located at a portion where relatively the smallest stress is generated when the first vibrating part 231 vibrates in the vertical direction (Z). For example, the second part 231b having the largest width (W2) among the plurality of second parts 231b is arranged in the middle part of the first vibrating part 231, and the second part 231b having the smallest width (W2) among the plurality of second parts 231b can be arranged in one or more of both end parts of the first vibrating part 231. Thereby, when the first vibrating part 231 vibrates in the vertical direction (Z), interference of sound waves or superposition of resonance frequencies generated at a portion where the largest stress is concentrated can be minimized. Thereby, a sound pressure drop (dip) phenomenon occurring in the low frequency band can be improved, and flatness of acoustic characteristics in the low frequency band can be improved. For example, the flatness of acoustic characteristics can be a magnitude or a deviation level of a deviation of sound pressure between the highest sound pressure and the lowest sound pressure.

[0105] In the first vibrating part 231, each of the plurality of first parts 231a can have a different size (or width) from each other. For example, the size (or width) of each of the plurality of first parts 231a can gradually decrease or increase from the middle part to both end parts (or both tips) of the first vibrating part 231. The piezoelectric first vibrating part 231 can improve the sound pressure characteristics of the sound by various natural vibration frequencies caused by the vibrations of each of the plurality of first parts 231a having different sizes from each other, and the reproduction band of the sound can be extended or increased.

[0106] Each of the plurality of second parts 231b can be arranged between the plurality of first parts 231a. Thereby, in the first vibrating part 231, the vibration energy due to the link in the unit lattice of the first part 231a can be increased by the second part 231b, so that the vibration characteristics can be increased, and piezoelectric characteristics and flexibility can be ensured.

[0107] For example, the second part 231b is at least one or more of an epoxy polymer, an acrylic polymer, and a silicone polymer, and the embodiments of the present invention are not limited thereto.

[0108] The second part 231b according to the embodiment of the present invention can be composed of an organic material part. For example, by being arranged between inorganic material parts, the organic material part can absorb the impact applied to the inorganic material part (or the first part), release the stress concentrated on the inorganic material part, improve the durability of the first vibrating part 231, and provide flexibility to the first vibrating part 231.

[0109] The second part 231b according to the embodiment of the present invention has a lower modulus and viscoelasticity compared to the first part 231a. Thereby, the reliability of the first part 231a that is vulnerable to impact due to brittle characteristics can be improved.

[0110] For example, when the vibration device 200 for vibrating the display panel 100 has impact resistance and high rigidity, it can have maximum vibration characteristics. Since the vibration device 200 has impact resistance and high rigidity, each of the plurality of second parts 231b can be made of a material having a relatively high damping factor (tanδ) and relatively high stiffness characteristics. For example, each of the plurality of second parts 231b can be made of a material having a damping factor (tanδ) of 0.1 to 1 GPa and stiffness characteristics of 0 to 10 GPa. And the damping factor (tanδ) and stiffness characteristics can be explained by the correlation between the loss factor and the modulus. For example, the second part 231b can be made of a material having a loss factor of 0.01 to 1 and a modulus of 0.1 to 10 GPa.

[0111] The organic material part formed in the second part 231b can include an organic material, an organic polymer, an organic piezoelectric material, or an organic non-piezoelectric material having flexible characteristics as compared with the inorganic material part (or the first part) of the first part 231a. For example, the second part 231b can be expressed as an adhesive part, an expansion and contraction part, a bending part, a damping part, or a soft part having flexibility, but the embodiments of the present invention are not limited thereto.

[0112] Since the organic material part containing the organic piezoelectric material can absorb the impact applied to the inorganic material part (or the first part), the durability of the entire vibration device 200 can be improved, and a certain level of piezoelectric characteristics can be provided. The organic piezoelectric material according to the embodiment of the present invention can be an organic material having electroactive characteristics. For example, it can include at least one or more of PVDF (Polyvinylidene fluoride), beta PVDF (β-Polyvinylidene fluoride), and PVDF-TrFE (Polyvinylidene-trifluoroethylene), but the embodiments of the present invention are not limited thereto.

[0113] The organic material part containing the organic non-piezoelectric material is composed of a curable resin composition and an adhesive containing the same, and can absorb the impact applied to the inorganic material part (or the first part), so that the durability of the entire vibration device 200 can be improved. The organic non-piezoelectric material according to an embodiment of the present invention can include at least one or more of an epoxy-based polymer, an acrylic-based polymer, and a silicone-based polymer, and the embodiments of the present invention are not limited thereto.

[0114] For example, the organic material part containing the organic non-piezoelectric material can include an adhesion promoter or an adhesion enhancer for the adhesion with the epoxy resin and the inorganic material part due to the high rigidity characteristics required for the vibration device 200. For example, the adhesion promoter is a phosphate-based one, etc., and the embodiments of the present invention are not limited thereto. The organic material part can be cured by at least one curing method. When curing the organic material part, in order to prevent the thickness uniformity of the vibration device 200 from decreasing due to the shrinkage of the organic material part caused by the volatilization of the solvent, a solvent-free type of epoxy resin can be used, and the embodiments of the present invention are not limited thereto.

[0115] The organic material part containing the organic non-piezoelectric material can further include a reinforcing agent for damping characteristics in addition to the high rigidity of the vibration device 200. For example, the reinforcing agent can be a core shell type of MBS (Methylmethacrylate-Butadiene-styrene), etc., and its content can be 5 to 40 wt%. In the case of the reinforcing agent, as a core shell type of elastomer, the shell part has a high binding force with an epoxy resin such as an acrylic-based polymer, so that the impact resistance or damping characteristics of the vibration device 200 can be improved.

[0116] According to the implementation of the present invention, the first vibrating part 231 can have a single thin film form by arranging (or connecting) a plurality of first parts 231a and second parts 231b in the same plane. For example, a plurality of first parts 231a of the first vibrating part 231 can have a structure connected to one side. For example, a plurality of first parts 231a can have a structure connected throughout the first vibrating part 231. For example, the first vibrating part 231 can vibrate in the vertical direction by the first part 231a having vibration characteristics, and can be bent into a curved surface form by the second part 231b having flexibility. Also, in the first vibrating part 231 according to an embodiment of the present invention, the size of the first part 231a and the size of the second part 231b can be set according to the piezoelectric characteristics and flexibility required for the first vibrating part 231. As an example of the present invention, in the case of the first vibrating part 231 that requires piezoelectric characteristics more than flexibility, the size of the first part 231a can be configured to be larger than the size of the second part 231b. As another example, in the case of the first vibrating part 231 that requires flexibility more than piezoelectric characteristics, the size of the second part 231b can be configured to be larger than the size of the first part 231a. Therefore, since the size of the first vibrating part 231 can be adjusted according to the required characteristics, there is an advantage that the design of the piezoelectric first vibrating part 231 is easy.

[0117] The first electrode part 233 can be arranged on the first surface (or the lower surface or the floor surface) of the first vibrating part 231. The first electrode part 233 can be commonly arranged or bonded to the first surface of each of the plurality of first parts 231a and the first surface of each of the plurality of second parts 231b. The first electrode part 233 can be electrically connected to the first surface of each of the plurality of first parts 231a. For example, the first electrode part 233 can be arranged on the entire first surface of the first vibrating part 231. The first electrode part 233 can have the form of a cylindrical electrode. For example, the first electrode part 233 can have a form substantially the same as that of the first vibrating part 231, and the embodiments of the present invention are not limited thereto. The first electrode part 233 according to an embodiment of the present invention can be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material, and the embodiments of the present invention are not limited thereto.

[0118] The second electrode portion 235 can be disposed on a second surface (or upper surface or top surface) that is opposite to or different from the first surface of the first vibrating portion 231. The second electrode portion 235 can be commonly disposed or coupled to the second surfaces of the respective plurality of first portions 231a and the second surfaces of the respective plurality of second portions 231b. The second electrode portion 235 can be electrically connected to the second surfaces of the respective plurality of first portions 231a. For example, the second electrode portion 235 can be disposed on the entire second surface of the first vibrating portion 231. The second electrode portion 235 can have the form of a cylindrical electrode. For example, the second electrode portion 235 can have the same form as the first vibrating portion 231, but embodiments of the present invention are not limited thereto. The second electrode portion 235 according to an embodiment of the present invention can be made of a transparent conductive material, a translucent conductive material, or an opaque conductive material, but embodiments of the present invention are not limited thereto.

[0119] The first electrode portion 233 can be covered by a first protective member 220 described later. The second electrode portion 235 can be covered by a second protective member 240 described later.

[0120] The first vibrating portion 231 of the first vibration generator 230 can be polarized by a constant voltage applied to the first electrode portion 233 and the second electrode portion 235 in a constant temperature atmosphere or a temperature atmosphere that changes from a high temperature to a normal temperature, but embodiments of the present invention are not limited thereto. Similarly, the second vibrating portion 271 of the second vibration generator 270 (described in detail later) can be polarized by a specific voltage applied to the first electrode portion 273 and the second electrode portion 275 in a specific temperature atmosphere or a certain temperature atmosphere, and changes from a high temperature to room temperature. For example, the first vibrating portion 231 of the first vibration generator 230 and the first vibrating portion 271 of the second vibration generator 270 can vibrate by alternately repeating contraction and expansion due to the inverse piezoelectric effect by vibration drive signals applied to their respective first electrode portions 233, 273 and their respective second electrode portions 235, 275. For example, the first vibrating portion 231 of the first vibration generator 230 and the first vibrating portion 271 of the second vibration generator 270 can vibrate in the vertical direction (d 33) and vibration in the plane direction (or horizontal direction) (d 31 ) can vibrate. Due to the contraction and expansion of the first vibrating part 231 in the plane direction, the displacement of the vibrating device 200 or the displacement of the display panel can increase, and thereby the vibration of the vibrating device 200 or the display panel can be further improved.

[0121] The second vibration generator 270 according to an embodiment of the present invention can include a second vibrating part 271 including a piezoelectric material, a first electrode part 273 disposed on the first surface of the second vibrating part 271, and a second electrode part 275 disposed on the second surface opposite to the first surface of the second vibrating part 271. Further, the second vibrating part 271 according to an embodiment of the present invention can include a plurality of first parts 271a and a plurality of second parts 271b.

[0122] Here, since the configurations of the second vibrating part 271, the first electrode part 273, and the second electrode part 275 of the second vibration generator 270 are the same as or similar to the configurations of the first vibrating part 231, the first electrode part 233, and the second electrode part 235 of the aforementioned first vibration generator 230, respectively, duplicate descriptions thereof are omitted.

[0123] The first connecting member 210 can include a first base material 211 disposed at the central part in the vertical direction and first adhesive layers 213 and 215 disposed on one surface (or lower surface) or the other surface (or upper surface) of the first base material 211, respectively. The first base material 211 can be the base material of the first connecting member 210.

[0124] For example, the first base material 211 of the first connecting member 210 can be a polymer film including polyethylene terephthalate (PET; polyethyleneterephthalate) and polyimide (PI; imide), and embodiments of the present invention are not limited thereto. The elastic modulus of polyethylene terephthalate can have a range of 3.5 to 11 GPa, and the elastic modulus of polyimide can have a range of 3.7 to 20 GPa.

[0125] For example, the first adhesive layers 213 and 215 of the first connecting member 210 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the adhesive layer can include a urethane-based material (or material) having a relatively lower elastic modulus than acrylic among acrylic and urethane. Incidentally, for example, the first adhesive layers 213 and 215 can have an elastic modulus in the range of 1 to 1000 MPa.

[0126] According to an embodiment of the present invention, the first connecting member 210 can include a first base material 211 disposed at the center in the vertical direction and first protrusions 211a formed to protrude from each of one surface (or lower surface or bottom surface) or the other surface (or upper surface or top surface) of the first base material 211.

[0127] As shown in FIG. 4, the first protrusions (end portions or tips or outer surfaces or respective corner portions) 211a of the first connecting member 210 can be aligned with the first portions (end portions or tips or outer surfaces or respective corner portions) 231a of the first vibrating portion 231 along a virtual extension line (VL).

[0128] The display device according to an embodiment of the present invention can further include a first protection member 220 and a second protection member 240 that cover the lower and upper portions of the first vibration generator 230.

[0129] The first protective member 220 can be disposed on the first electrode portion 233. The first protective member 220 can protect the first electrode portion 233. The second protective member 240 can be disposed on the second electrode portion 235. The second protective member 240 can protect the second electrode portion 235. For example, each of the first protective member 220 and the second protective member 240 of the first vibration generator 230 can be made of a plastic material or a fiber material, and embodiments of the present invention are not limited thereto. For example, in the first vibration generator 230, the first protective member 220 can be made of the same or different material as the second protective member 240. At least one or both of the first protective member 220 and the second protective member 240 of the first vibration generator 230 can be connected or coupled to the back surface of the display panel 100 via the first connecting member 210. For example, the first protective member 220 of the first vibration generator 230 can be connected or coupled to the back surface of the display panel 100 via the first connecting member 210.

[0130] The first protective member 220 can include a first base material 221 and a first adhesive layer 223, and the first adhesive layer 223 can be formed to be adjacent to the first vibration generator 230 from the first base material 221. The first adhesive layer 223 of the first protective member 220 can be located between the first electrode portion 233 of the first vibration generator 230 and the first base material 221 of the first protective member 220.

[0131] The second protective member 240 can include a second base material 241 and a second adhesive layer 243, and the second adhesive layer 243 can be formed to be adjacent to the first vibration generator 230 from the second base material 241. The second adhesive layer 243 of the second protective member 240 can be located between the second electrode portion 235 of the first vibration generator 230 and the second base material 241 of the second protective member 240.

[0132] Each of the first base material 221 and the second base material 241 of the first and second protective members 220 and 240 can be a polyimide film or a polyethylene terephthalate film, and embodiments of the present invention are not limited thereto.

[0133] Each of the first and second adhesive layers 223 and 243 of the first and second protective members 220 and 240 may include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, and embodiments of the present invention are not limited thereto.

[0134] The first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 may be connected or joined to each other between the first protective member 220 and the second protective member 240. For example, the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 may be connected or joined to each other at the end portions between the first protective member 220 and the second protective member 240. Thereby, the first vibration portion 231 of the first vibration generator 230 may be surrounded by the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240. For example, the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 may completely surround the entire first vibration portion 231 of the first vibration generator 230. For example, the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 may be represented collectively or individually by a cover member or the like, and embodiments of the present invention are not limited thereto. When the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 are a cover member collectively, the first protective member 220 may be disposed on the first surface (or lower surface) of the cover member, and the second protective member 240 may be disposed on the second surface (or upper surface) of the cover member.

[0135] The second connecting member 250 may include a second base material 251 disposed at the central portion in the vertical direction and a plurality of second adhesive layers 253 and 255 disposed on each of one surface (or lower surface or bottom surface) or the other surface (or upper surface or top surface) of the second base material 251.

[0136] The second base material 251 of the second connecting member 250 may be a polymer film including polyethylene terephthalate (PET) and polyimide (PI), and embodiments of the present invention are not limited thereto. The elastic modulus of polyethylene terephthalate can have a range of 3.5 to 11 GPa, and the elastic modulus of polyimide can have a range of 3.7 to 20 GPa.

[0137] For example, the second adhesive layers 253 and 255 of the second connecting member 250 may include epoxy, acrylic, silicone, or urethane, and embodiments of the present invention are not limited thereto. For example, the second adhesive layers 253 and 255 of the second connecting member 250 may include a urethane-based material (or material) having a relatively lower elastic modulus than acrylic among acrylic and urethane. Incidentally, for example, the adhesive layers 253 and 255 of the second connecting member 250 can have an elastic modulus in the range of 1 to 1000 MPa.

[0138] According to an embodiment of the present invention, the second connecting member 250 may include a second base material 251 disposed at the center in the vertical direction, and second protrusions 251a formed to protrude from each of one surface (or lower surface or bottom surface) or the other surface (or upper surface or top surface) of the second base material 251.

[0139] As shown in FIG. 4, the second protrusions (end portions or tips or outer surfaces or corner portions) 251a of the second connecting member 250 may be aligned with the first portions (end portions or tips or outer surfaces or corner portions) 231a of the first vibrating portion 231 of the first vibration generator 230 and the first portions (end portions or tips or outer surfaces or corner portions) 271a of the first vibrating portion 231 of the second vibration generator 270 along a virtual extension line (VL).

[0140] The display device according to an embodiment of the present invention may further include a third protection member 260 and a fourth protection member 280 that cover the lower and upper portions of the second vibration generator 270.

[0141] The third protective member 260 can be disposed on the first electrode portion 273 of the second vibrating portion 271. The third protective member 260 can protect the first electrode portion 273 of the second vibrating portion 271. The fourth protective member 280 can be disposed on the second electrode portion 275 of the second vibrating portion 271. The fourth protective member 280 can protect the second electrode portion 275 of the second vibrating portion 271. For example, each of the third protective member 260 and the fourth protective member 280 can be made of a plastic material or a fiber material, and embodiments of the present invention are not limited thereto. For example, the third protective member 260 can be made of the same or different material as the fourth protective member 280.

[0142] The third protective member 260 can include a third base material 261 and a third adhesive layer 263, and the third adhesive layer 263 can be formed so as to be adjacent to the second vibration generator 270 from the third base material 261. The third adhesive layer 263 of the third protective member 260 can be located between the first electrode portion 273 of the second vibration generator 270 and the third base material 261 of the third protective member 260.

[0143] The fourth protective member 280 can include a fourth base material 281 and a fourth adhesive layer 283, and the fourth adhesive layer 283 can be formed so as to be adjacent to the second vibration generator 270 from the fourth base material 281. The fourth adhesive layer 283 of the fourth protective member 280 can be located between the second electrode portion 275 of the second vibration generator 270 and the fourth base material 281 of the fourth protective member 280.

[0144] Each of the third and fourth base materials 261 and 281 of the third and fourth protective members 260 and 280 can be a polyimide film or a polyethylene terephthalate film, and embodiments of the present invention are not limited thereto.

[0145] Each of the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, and embodiments of the present invention are not limited thereto.

[0146] The third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280 can be connected or joined to each other between the third protection member 260 and the fourth protection member 280. For example, the third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280 can be connected or joined to each other at the end portions between the third protection member 260 and the fourth protection member 280. Thereby, the second vibration part 271 of the second vibration generator 270 can be surrounded by the third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280. For example, the third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280 can completely surround the entire second vibration part 271 of the second vibration generator 270. For example, the third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280 can be represented by a cover member or the like collectively or individually, but the embodiments of the present invention are not limited thereto. When the third adhesive layer 263 of the third protection member 260 and the fourth adhesive layer 283 of the fourth protection member 280 are a cover member collectively, the third protection member 260 can be disposed on the first surface of the cover member, and the fourth protection member 280 can be disposed on the second surface of the cover member.

[0147] The first vibration part 231 of the first vibration generator 230 and the second vibration part 271 of the second vibration generator 270 can overlap while having the same size as each other in order to maximize or increase the displacement amount or amplitude displacement of the vibration device 200. Specifically, each of the first part 231a and the second part 231b of the first vibration part 231 of the first vibration generator 230 can substantially overlap or overlay with the first part 271a and the second part 271b of the second vibration part 271 of the second vibration generator 270 without going astray.

[0148] For example, each first portion (end portion or tip or outer surface or each corner portion) 231a of the first vibrating part 231 of the first vibration generator 230 can be substantially aligned or overlapped with each first portion (end portion or tip or outer surface or each corner portion) 271a of the second vibrating part 271 of the second vibration generator 270 without getting in each other's way. For example, each first portion (end portion or tip or outer surface or each corner portion) 231a of the first vibrating part 231 of the first vibration generator 230 can be substantially aligned or overlapped within the range of manufacturing errors without getting in each other's way with each first portion (end portion or tip or outer surface or each corner portion) 271a of the second vibrating part 271 of the second vibration generator 270.

[0149] Also, the first portion 231a of the first vibrating part 231 and the first protruding part 211a of the first connecting member 210 can overlap with each other while having the same size in order to maximize or increase the displacement amount or amplitude displacement.

[0150] For example, as shown in FIG. 4, each first portion 231a (end portion or tip or outer surface or each corner portion) of the first vibrating part 231 of the first vibration generator 230 can be aligned with a virtual extension line (VL). The first protruding part 211a (end portion or tip or outer surface or each corner portion) of the first connecting member 210 can be aligned with the virtual extension line (VL).

[0151] Also, each first portion 271a (end portion or tip or outer surface or each corner portion) of the second vibrating part 271 of the second vibration generator 270 can be aligned with the virtual extension line (VL). The second protruding part 251a (end portion or tip or outer surface or each corner portion) of the second connecting member 250 can be aligned with the virtual extension line (VL).

[0152] According to an embodiment of the present invention, the plurality of second portions 231b of the first oscillator 230 and the plurality of second portions 231b of the second oscillator 270 can substantially overlap or be superimposed on each other without crossing each other while having the same size. Also, the first protrusion 211a of the first connecting member 210 and the second protrusion 251a of the second connecting member 250 can substantially overlap or be superimposed on each other without crossing each other while having the same size. — Moreover, the plurality of first portions 231a of the first oscillator 230, the plurality of first portions 271a of the second oscillator 270, the first protrusion 211a of the first connecting member 210, and the second protrusion 251a of the second connecting member 250 can substantially overlap or be superimposed on each other without crossing each other while having the same size.

[0153] Therefore, in the vibration device 200 according to an embodiment of the present invention, the first portions 231a of the first vibration portion 231 of the first oscillator 230 and the first portions 271a of the second vibration portion 271 of the second oscillator 270 overlap with the first protrusion 211a of the first connecting member 210 and the second protrusion 251a of the second connecting member 250, thereby minimizing the volume within the vibration device 200 where the first to fourth adhesive layers 223, 243, 263, 283 of the first to fourth connecting members 220, 240, 260, 280 having a relatively low elastic modulus overlap. By doing so, the loss of vibration generated by the first oscillator 230 and the second oscillator 270 can be minimized.

[0154] In FIGS. 1 to 4 and the related description, the vibration device 200 according to another embodiment of the present invention is described as including the first and second oscillators 230 and 270. However, the embodiments of the present invention are not limited to this. — For example, the vibration device 200 according to another embodiment of the present invention can include a plurality (for example, three or more) of oscillators. Also in this case, the plurality of oscillators can overlap with each other while having the same size in order to maximize or increase the displacement amount or amplitude displacement of the vibration device 200, and can overlap with each other while having the same size as the protrusions of the connecting members.

[0155] Therefore, in the display device according to the embodiment of the present invention, the vibration generated by the first vibration generator 230 can be minimized from being lost due to the vibration damping of the first adhesive layers 213 and 215 of the first connection member 210, thereby minimizing the vibration loss generated by the first vibration generator 230 and improving the sound pressure.

[0156] In addition, the first connection member 210 is formed such that the first protrusion 211a having an elastic modulus higher than that of the first adhesive layers 213 and 215 overlaps with the first portion 231a of the first vibration portion 231, so that the vibration generated by the first vibration portion 231 can be effectively transmitted to the display panel 100, and the vibration performance or vibration characteristics can be improved.

[0157] Thereby, the vibration loss generated by the first vibration generator 230 can be minimized, and the sound pressure can be improved.

[0158] In addition, the first and second base materials 211 and 251 of the first connection member 210 and the second connection member 250 include first and second protrusions 211a and 251a protruding from the upper surface (or top surface) and the lower surface (or bottom surface), respectively, and can be formed to occupy a relatively large volume as compared with the structure of the connection member that does not include the protrusion. Here, the first and second base materials 211 and 251 of the first connection member 210 and the second connection member 250 have relatively low coefficients of thermal expansion (CTE) compared to the first and second adhesive layers 213, 215, 253, and 255 of the first connection member 210 and the second connection member 250, respectively, and the reliability such as thermal shock can be improved.

[0159] FIG. 5 is a cross-sectional view showing a display device according to another embodiment of the present invention.

[0160] Referring to FIG. 5, the display device according to an embodiment of the present invention can include a vibration device 200 disposed on or below the display panel 100. The vibration device 200 can include a first connection member 210, a first vibration generator 230, a second connection member 250, and a second vibration generator 270. In FIG. 5, since it is the same as the structure of FIG. 3 except that first and second high modulus members 217 and 257 of the first connection member 210 and the second connection member 250 are added, duplicate descriptions will be omitted.

[0161] The first connection member 210 can further include a first high modulus member 217 formed to overlap in the vertical direction with a first portion 231a of the first vibration portion 231 and a first portion 271a of the second vibration portion 271. The first high modulus member 217 can be a high modulus member of the first connection member 210. The second connection member 250 can further include a second high modulus member 257 formed to overlap in the vertical direction with a first portion 231a of the first vibration portion 231 and a first portion 271a of the second vibration portion 271. The second high modulus member 257 can be a high modulus member of the second connection member 250.

[0162] The first high modulus member 217 of the first connection member 210 can be provided to have a size corresponding to the first portion 231a of the first vibration portion 231, and can be formed to contact the upper surface (or top surface) and the lower surface (or bottom surface) of the first base material 211 of the first connection member 210.

[0163] The first high modulus member 217 of the first connection member 210 can include the same material as the first base material 211 of the first connection member 210, or can be composed of a ceramic having a higher elastic modulus than the first base material 211. For example, the first high modulus member 217 of the first connection member 210 can include at least one or more of polystyrene (PS), polyethylene terephthalate (PET), and polyimide (PI), and / or the first high modulus member 217 can be silicon — oxide (SiO 2) and alumina (Al 2 O 3 ) can include at least one or more of these, but is not limited thereto. —

[0164] Here, polystyrene can have an elastic modulus of about 3 GPa, and silicon — oxide (SiO 2 ) can have an elastic modulus of about 94 GPa, and alumina (Al 2 O 3 ) can have about 390 GPa.

[0165] The second high-elastic member 257 of the second connecting member 250 can be provided to have a size corresponding to the first portion 231a of the first vibrating portion 231 and the first portion 271a of the second vibrating portion 271, and the second high-elastic member 257 of the second connecting member 250 can be formed to be in contact with the upper and lower surfaces of the second base material 251 of the second connecting member 250.

[0166] The second high-elastic member 257 of the second connecting member 250 can include the same material as the second base material 251. Alternatively, the second high-elastic member 257 of the second connecting member 250 can be composed of a ceramic having a higher elastic modulus than the second base material 251 of the second connecting member 250. For example, the second high-elastic member 257 of the second connecting member can include at least one or more of polystyrene (PS; polystyrene), polyethylene terephthalate (PET; polyethyleneterephthalate), and polyimide (PI; polyimide), and / or the second high-elastic member 257 of the second connecting member can include silicon — oxide (SiO 2 ) and alumina (Al 2 O 3 ) can include at least one or more of these, but is not limited thereto. —

[0167] Here, polystyrene can have an elastic modulus of about 3 GPa, and silicon — oxide (SiO 2 ) can have an elastic modulus of about 94 GPa, and alumina (Al 2 O 3 ) can have about 390 GPa.

[0168] FIG. 6 is a cross-sectional view showing a display device according to another embodiment of the present invention.

[0169] Referring to FIG. 6, the display device according to the embodiment of the present invention can include a vibration device 200 disposed above — or below — the display panel 100. The vibration device 200 can include a first connecting member 210, a first vibration generator 230, a second connecting member 250, and a second vibration generator 270. In FIG. 6, since it is the same as the structure of FIG. 3 except that first and second high modulus fillers 219 and 259 of the first connecting member 210 and the second connecting member 250 are respectively added, duplicate explanations will be omitted.

[0170] The first connecting member 210 can further include a first high modulus filler 219 formed to overlap perpendicularly with a first portion 231a of the first vibrating portion 231 and a first portion 271a of the second vibrating portion 271. The second connecting member 250 can further include a second high modulus filler 259 formed to overlap perpendicularly with a first portion 231a of the first vibrating portion 231 and a first portion 271a of the second vibrating portion 271.

[0171] The first high modulus filler 219 of the first connecting member 210 can be provided to have a region corresponding to the first portion 231a of the first vibrating portion 231, and can be formed to contact the upper surface (or top surface) and the lower surface (or bottom surface) of the first base material 211 of the first connecting member 210.

[0172] The first highly elastic filler 219 of the first connecting member 210 can include the same material as the first base material 211, or can be composed of a ceramic having a higher elastic modulus than the first base material 211. For example, the first highly elastic filler 219 of the first connecting member 210 can include at least one or more of polystyrene, polyethylene terephthalate, and polyimide, and the first highly elastic filler 219 is silicon — oxide (SiO 2 ) and alumina (Al 2 O 3 ) can include at least one or more of them, but is not limited — to this.

[0173] FIG. 7 is a cross-sectional view showing a display device according to another embodiment of the present invention, and FIG. 8 is a perspective view showing the connection relationship between the vibrating part of FIG. 7 and the base material of the first protective member.

[0174] Referring to FIGS. 7 and 8, the display device according to the embodiment of the present invention can include a vibrating device 200 disposed on or below the display panel 100, and the vibrating device 200 can include a first connecting member 210, a first vibrating generator 230, a second connecting member 250, and a second vibrating generator 270. Further, the vibrating device 200 can further include a first protective member 220 and a second protective member 240 that respectively cover the lower surface (or bottom surface) and the upper surface (or top surface) of the first vibrating generator 230, and a third protective member 260 and a fourth protective member 280 that respectively cover the lower surface (or bottom surface) and the upper surface (or top surface) of the second vibrating generator 270. In FIG. 7, except that the first to fourth base materials 221, 241, 261, 281 of the first protective member 220, the second protective member 240, the third protective member 260, and the fourth protective member 280 are each configured to further include a protruding portion, the structure is the same as that of FIG. 3, so redundant explanations will be omitted.

[0175] Referring to FIG. 7, in the display device according to another embodiment of the present invention, the first base material 221 of the first protection member 220 can further include a first protruding portion 221a, the second base material 241 of the second protection member 240 can further include a second protruding portion 241a, the third base material 261 of the third protection member 260 can further include a third protruding portion 261a, and the fourth base material 281 of the fourth protection member 280 can further include a fourth protruding portion 281a.

[0176] The first to fourth protruding portions 221a, 241a, 261a, and 281a provided on the first to fourth protection members 220, 240, 260, and 280, respectively, can be made of the same material as the base materials 221, 241, 261, and 281, respectively.

[0177] The first protruding portion 221a of the first protection member 220 and the second protruding portion 241a of the second protection member 240 can be formed on the side facing the first vibration generator 230.

[0178] Therefore, as shown in FIG. 7, the first protruding portion 221a of the first protection member 220 can be formed in a form protruding upward from the first base material 221 of the first protection member 220 toward the first vibration generator 230, and the second protruding portion 241a of the second protection member 240 can be formed in a form protruding downward from the second base material 241 of the second protection member 240 toward the first vibration generator 230.

[0179] The third protruding portion 261a of the third protection member 260 and the fourth protruding portion 281a of the fourth protection member 280 can be formed on the side facing the second vibration generator 270.

[0180] Therefore, as shown in FIG. 7, the third protruding portion 261a of the third protection member 260 can be formed in a form protruding upward from the third base material 261 of the third protection member 260 toward the second vibration generator 270, and the fourth protruding portion 281a of the fourth protection member 280 can be formed in a form protruding downward from the fourth base material 281 of the fourth protection member 280 toward the third vibration generator 230.

[0181] FIG. 9 is a cross-sectional view showing a display device according to another embodiment of the present invention. In FIG. 9, since the structure is the same as that of FIG. 5 except that each of the first to fourth protective members is formed to include each of its high-elasticity members, redundant explanations will be omitted.

[0182] Referring to FIG. 9, in the display device according to another embodiment of the present invention, the first protective member 220 may further include a first high-elasticity member 225, the second protective member 240 may further include a second high-elasticity member 245, the third protective member 260 may further include a third high-elasticity member 265, and the fourth protective member 280 may further include a fourth high-elasticity member 285.

[0183] The first to fourth high-elasticity members 225, 245, 265, and 285 provided on the first to fourth protective members 220, 240, 260, and 280, respectively, may be made of the same material as the first to fourth base materials 221, 241, 261, and 281, or may be made of a material having a higher elastic modulus than the base material.

[0184] For example, the first to fourth high-elasticity members 225, 245, 265, and 285 may include at least one or more of polystyrene, polyethylene terephthalate (PET), and polyimide, or the first to fourth high-elasticity members 225, 245, 265, and 285 may be — silicon 2 oxide (SiO 2 O 3 ) and alumina (Al 2 O 3 ) and may include at least one or more of them, but is not limited — to this.

[0185] The first high-elasticity member 225 of the first protective member 220 and the second high-elasticity member 245 of the second protective member 240 may be formed on the side facing the first vibrator 230, respectively.

[0186] Therefore, as shown in FIG. 9, the first highly elastic member 225 of the first protective member 220 can protrude upward from the first base material 221 of the first protective member 220 toward the first vibration generator 230. On the other hand, the second highly elastic member 245 of the second protective member 240 can protrude downward from the second base material 241 of the second protective member 240 toward the first vibration generator 230.

[0187] The third highly elastic member 265 of the third protective member 260 and the fourth highly elastic member 285 of the fourth protective member 280 can be formed on the side facing the third vibration generator 270, respectively.

[0188] Therefore, as shown in FIG. 9, the third highly elastic member 265 of the third protective member 260 can protrude upward from the third base material 261 of the third protective member 260 toward the second vibration generator 270. On the other hand, the fourth highly elastic member 285 of the fourth protective member 280 can protrude downward from the fourth base material 281 of the fourth protective member 280 toward the third vibration generator 230.

[0189] FIG. 10 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 10 has the same structure as that of FIG. 6 except that each of the first to fourth protective members contains a highly elastic filler, respectively, duplicate descriptions will be omitted.

[0190] Referring to FIG. 10, in the display device according to another embodiment of the present invention, the first protective member 220 can further include a first highly elastic filler 227, the second protective member 240 can further include a second highly elastic filler 247, the third protective member 260 can further include a third highly elastic filler 267, and the fourth protective member 280 can further include a fourth highly elastic filler 287.

[0191] The first to fourth highly elastic fillers 227, 247, 267, and 287 provided in each of the first to fourth protective members 220, 240, 260, and 280 can be made of the same material as the first to fourth base materials 221, 241, 261, and 281, or can be made of a material having a higher elastic modulus than the base material.

[0192] For example, the first to fourth highly elastic fillers 227, 247, 267, and 287 can include at least one or more of polystyrene (PS), polyethylene terephthalate (PET), and polyimide (PI). The first to fourth highly elastic fillers 227, 247, 267, and 287 can include — silicon oxide (SiO 2 ) and alumina (Al 2 O 3 ), but is not limited thereto.

[0193] FIG. 11 is a cross-sectional view showing a display device according to another embodiment of the present invention. In the display device of FIG. 11, since it is the same as the structure of FIG. 3 except that the first protective member and the third protective member (FIG. 3) are not formed, duplicate explanations will be omitted.

[0194] Referring to FIG. 11, in the display device according to another embodiment of the present invention, the first connecting member 210 and the first vibration generator 230 are formed to be in direct contact without forming the first protective member 220 (FIG. 3) located below the first vibration generator 230, and the second connecting member 250 and the second vibration generator 270 are formed to be in direct contact without forming the third protective member 260 (FIG. 3) located below the second vibration generator 270.

[0195] The display device of FIG. 11 can reduce the total thickness of the vibration device 200 by replacing the functions and structures of the first protective member 220 with the first connecting member 210 and replacing the functions and structures of the third protective member 260 with the second connecting member 250.

[0196] Therefore, the display device according to the embodiment of the present invention can provide a vibration device 200 having a thin thickness, whereby the gap space (GS) between the vibration device 200 and the support member 300 (FIG. 2) can be increased, and the sound pressure characteristics of the vibration device 200 can be improved. The change in the sound pressure characteristics due to the gap space (GS) between the vibration device 200 and the support member 300 will be described later with reference to FIGS. 25 and 26.

[0197] FIG. 12 is a cross-sectional view showing a display device according to another embodiment of the present invention. The display device of FIG. 12 has a structure in which only the first vibration generator 230 is included without the configuration of the second vibration generator 270 in the structure of the display device of FIG. 11, and the vibration device 200 is constituted by only a single vibration generator. Therefore, the display device of FIG. 12 may be the same as or similar to the structure of FIG. 3 except that the second connecting member 250 and the second vibration generator 270 (e.g., shown in FIG. 11) are not provided, and since the above detailed description can be referred to, duplicate description will be omitted here.

[0198] Referring to FIG. 12, a display device according to another embodiment of the present invention may include a display panel 100, a first vibration generator 230 disposed on or below the display panel 100, and a first connecting member 210 disposed between the first vibration generator 230 and the display panel 100.

[0199] The display device of FIG. 12 can be formed such that the first connecting member 210 and the first vibration generator 230 are in direct contact without forming the first protection member 220 located below the first vibration generator 230 (FIG. 3). Further, the display device of FIG. 12 can reduce the total thickness of the vibration device 200 by replacing the function and structure of the first protection member 220 with the first connecting member 210.

[0200] Therefore, the display device according to the embodiment of the present invention can provide a vibration device 200 having a thin thickness, whereby the gap space (GS) between the vibration device 200 and the support member 300 (FIG. 2) can be increased, and the sound pressure characteristics of the vibration device 200 can be improved. The change in the sound pressure characteristics due to the gap space (GS) between the vibration device 200 and the support member 300 will be described later with reference to FIGS. 25 and 26.

[0201] FIGS. 13 and 14 are perspective views showing the connection relationship between the vibration part and the base material of the first connection member according to another embodiment of the present invention.

[0202] Referring to FIGS. 13 and 14, the first vibration part 231 according to another embodiment of the present invention can be formed of a plurality of first parts 231a arranged to be separated from each other in the first direction (X) and the second direction (Y), and can include a second part 231b provided between the first parts 231a. Here, the shape of the first part 231a can be provided in various shapes such as a square, a rectangle, an ellipse, a circle, etc.

[0203] Each of the plurality of first parts 231a according to the embodiment of the present invention can have a column structure having a square, rectangular, elliptical or circular cross section. For example, each of the plurality of first parts 231a can have a column structure having a square, rectangular, elliptical or circular cross section, but the embodiments of the present invention are not limited thereto. Since each of the plurality of first parts 231a is made of substantially the same piezoelectric material as the first part 231a described in FIGS. 1 to 12, the same reference numerals are given thereto, and the overlapping description thereof is omitted.

[0204] A plurality of second portions 231b according to an embodiment of the present invention may be disposed between a plurality of first portions 231a along the first direction (X) and the second direction (Y), respectively. The second portion 231b may be connected or adhered to side surfaces of each of the plurality of first portions 231a by being configured to surround each of the plurality of first portions 231a. Each of the plurality of first portions 231a and the second portion 231b may be arranged (or arrayed) parallel to each other in the same plane (or the same layer). Since the second portion 231b is made of substantially the same organic material as the second portion 231b described in FIGS. 1 to 12, the same reference numerals are assigned thereto, and redundant description thereof is omitted.

[0205] Therefore, the first vibration part 231 of the first vibration generator 230 according to an embodiment of the present invention can be embodied as a vibration source (or a vibrating body) having a column structure with a square, rectangular, elliptical or circular cross-section while having a 1-3 composite, whereby the vibration characteristics or the acoustic output characteristics can be improved.

[0206] Also, the description of the first vibration part 231 of the first vibration generator 230 described in FIGS. 13 and 14 can be similarly applied to the second vibration part 271 of the second vibration generator 270, and the description of the first base material 211 of the first connecting member 210 can be similarly applied to the second base material 251 of the second connecting member 250 and the first to fourth base materials 221, 241, 261, 281 of the first to fourth protection members 220, 240, 260, 280.

[0207] FIG. 15 is a cross-sectional view showing a display device according to another embodiment of the present invention.

[0208] Referring to FIG. 15, a display device according to an embodiment of the present invention may include a vibration device 200 disposed on or below a display panel 100, and the vibration device 200 may include a first connecting member 210, a first vibration generator 230, a second connecting member 250, and a second vibration generator 270.

[0209] The first oscillator 230 according to an embodiment of the present invention may include a first vibrating portion 231 including a piezoelectric material, a first electrode portion 233 disposed on a first surface of the first vibrating portion 231, and a second electrode portion 235 disposed on a second surface opposite to the first surface of the first vibrating portion 231.

[0210] The first vibrating portion 231 may include a piezoelectric material. The first vibrating portion 231 may be expressed by terms such as a vibrating layer, a piezoelectric layer, a piezoelectric material layer, an electroactive layer, a piezoelectric vibrating portion, a piezoelectric material portion, an electroactive portion, an inorganic material layer, or an inorganic material portion, and embodiments of the present invention are not limited thereto.

[0211] Since the first vibrating portion 231 may be made of a transparent, translucent, or opaque piezoelectric material, it may be transparent, translucent, or opaque.

[0212] The first vibrating portion 231 may be made of substantially the same material as the first portion 231a of the first vibrating portion 231 described above with reference to FIGS. 3 and 4, and thus redundant description thereof will be omitted.

[0213] The second oscillator 270 according to an embodiment of the present invention may include a second vibrating portion 271 including a piezoelectric material, a first electrode portion 273 disposed on a first surface of the second vibrating portion 271, and a second electrode portion 275 disposed on a second surface opposite to the first surface of the second vibrating portion 271.

[0214] Here, since the configurations of the second vibrating portion 271, the first electrode portion 273, and the second electrode portion 275 of the second oscillator 270 are the same as the configurations of the first vibrating portion 231, the first electrode portion 233, and the second electrode portion 235 of the first oscillator 230 described above, redundant description thereof will be omitted.

[0215] The first connecting member 210 can include a first base material 211, and first adhesive layers 213 and 215 attached to the upper surface (or top surface) and the lower surface (or bottom surface) of the first base material 211. The second connecting member 250 can include a second base material 251 of the second connecting member 250, and second adhesive layers 251 and 255 of the second connecting member 250 attached to the upper surface (or top surface) and the lower surface (or bottom surface) of the second base material 251 of the second connecting member 250. Therefore, the first connecting member 210 and the second connecting member 250 can be provided in a structure like a double-sided tape with adhesive layers formed on both sides of the first and second base materials 211 and 251.

[0216] For example, the first base material 211 of the first connecting member 210 and the second connecting member 250 — The second base material 251 can be a polymer film including polyethylene terephthalate (PET) and polyimide (PI), and embodiments of the present invention are not limited thereto. The elastic modulus of polyethylene terephthalate can be in the range of 3.5 to 11 GPa, and the elastic modulus of polyimide can be in the range of 3.7 to 20 GPa.

[0217] For example, the first adhesive layers 213 and 215 of the first connecting member 210 and the second adhesive layers 251 and 255 of the second connecting member 250 can include epoxy, acrylic, silicone, or urethane, and embodiments of the present invention are not limited thereto. For example, the first adhesive layers 213 and 215 of the first connecting member 210 and the second adhesive layers 251 and 255 of the second connecting member 250 can include a urethane-based material (or material) having a relatively lower elastic modulus than acrylic among acrylic and urethane.

[0218] The display device according to an embodiment of the present invention can further include a first protection member 220 and a second protection member 240 that cover the lower part and the upper part of the first vibration generator 230.

[0219] The first protective member 220 can be disposed on the first electrode portion 233. The first protective member 220 can protect the first electrode portion 233. The second protective member 240 can be disposed on the second electrode portion 235. The second protective member 240 can protect the second electrode portion 235. For example, each of the first protective member 220 and the second protective member 240 of the first vibration generator 230 can be made of a plastic material or a fiber material, and the embodiments of the present invention are not limited thereto. For example, in the first vibration generator 230, the first protective member 220 can be made of the same or another material as the second protective member 240. One or more of the first protective member 220 and the second protective member 240 of the first vibration generator 230 can be connected or coupled to the back surface of the display panel 100 via the first connecting member 210. For example, the first protective member 220 of the first vibration generator 230 can be connected or coupled to the back surface of the display panel 100 via the first connecting member 210.

[0220] The first protective member 220 can include a first base material 221 and a first adhesive layer 223, and the first adhesive layer 223 can be formed so as to be adjacent to the first vibration generator 230 from the first base material 221. The first adhesive layer 223 of the first protective member 220 can be located between the first electrode portion 233 of the first vibration generator 230 and the first base material 221 of the first protective member 220.

[0221] The second protective member 240 can include a second base material 241 and a second adhesive layer 243, and the second adhesive layer 243 of the second protective member 240 can be formed so as to be adjacent to the first vibration generator 230 from the second base material 241. The second adhesive layer 243 of the second protective member 240 can be located between the second electrode portion 235 of the first vibration generator 230 and the second base material 241 of the second protective member 240.

[0222] Each of the first base material 221 and the second base material 241 of the first and second protective members 220, 240 is a polyimide film or a polyethylene terephthalate film, and the embodiments of the present invention are not limited thereto.

[0223] Each of the first and second adhesive layers 223 and 243 of the first and second protective members 220 and 240 can include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, and embodiments of the present invention are not limited thereto.

[0224] The first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 can be connected or joined to each other between the first protective member 220 and the second protective member 240. For example, the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 can be connected or joined to each other at an end portion between the first protective member 220 and the second protective member 240. Thereby, the first vibrating portion 231 of the first vibrator 230 can be surrounded by the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240. For example, the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 can be represented by a cover member or the like, and embodiments of the present invention are not limited thereto. When the first adhesive layer 223 of the first protective member 220 and the second adhesive layer 243 of the second protective member 240 are cover members, the first protective member 220 can be disposed on the first surface of the cover member, and the second protective member 240 can be disposed on the second surface of the cover member.

[0225] The display device according to an embodiment of the present invention can further include a third protective member 260 and a fourth protective member 280 that cover the lower and upper portions of the second vibrator 270.

[0226] The third protective member 260 can be disposed on the first electrode portion 273 of the second vibrating portion 271. The third protective member 260 can protect the first electrode portion 273 of the second vibrating portion 271. The fourth protective member 280 can be disposed on the second electrode portion 275 of the second vibrating portion 271. The fourth protective member 280 can protect the second electrode portion 275 of the second vibrating portion 271. For example, each of the third protective member 260 and the fourth protective member 280 can be made of a plastic material or a fiber material, and the embodiments of the present invention are not limited thereto. For example, the third protective member 260 can be made of the same or different material as the fourth protective member 280.

[0227] The third protective member 260 can include a third base material 261 of the third protective member 260 and a third adhesive layer 263 of the third protective member 260, and the third adhesive layer 263 of the third protective member 260 can be formed to be adjacent to the second vibration generator 270 rather than the third base material 261 of the third protective member 260. The third adhesive layer 263 of the third protective member 260 can be located between the first electrode portion 273 of the second vibration generator 270 and the third base material 261 of the third protective member 260.

[0228] The fourth protective member 280 can include a fourth base material 281 and a fourth adhesive layer 283, and the fourth adhesive layer 283 can be formed to be adjacent to the second vibration generator 270 rather than the fourth base material 281. The fourth adhesive layer 283 of the fourth protective member 280 can be located between the second electrode portion 275 of the second vibration generator 270 and the fourth base material 281 of the fourth protective member 280.

[0229] Each of the third and fourth base materials 261 and 281 of the third and fourth protective members 260 and 280 can be a polyimide film or a polyethylene terephthalate film, and the embodiments of the present invention are not limited thereto.

[0230] Each of the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can include an epoxy resin, an acrylic resin, a silicone resin, or a urethane resin, and the embodiments of the present invention are not limited thereto.

[0231] The third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can be connected or joined to each other between the third protective member 260 and the fourth protective member 280. For example, the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can be connected or joined to each other at the end portions between the third protective member 260 and the fourth protective member 280. Thereby, the first vibrating portion 231 of the first vibrator 230 can be surrounded by the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280. For example, the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can completely surround the entire first vibrating portion 231 of the first vibrator 230. For example, the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 can be represented by a cover member or the like, but the embodiments of the present invention are not limited thereto. When the third adhesive layer 263 of the third protective member 260 and the fourth adhesive layer 283 of the fourth protective member 280 are cover members, the third protective member 260 can be disposed on the first surface of the cover member, and the fourth protective member 280 can be disposed on the second surface of the cover member.

[0232] FIG. 16 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 16 has the same structure as that of FIG. 15 except that the second connecting member is composed of only a single adhesive layer, duplicate explanations will be omitted.

[0233] Referring to FIG. 16, the second connecting member 250 can be formed in a single structure composed of only an adhesive layer, rather than being composed of a base material and an adhesive layer. Here, the second connecting member 250 can include an adhesive layer having a higher elastic modulus than the adhesive layer formed together when the first connecting member 210 and the second connecting member 250 include a base material, or the first protective member to the fourth protective member 220, 240, 260, 280 include a base material.

[0234] For example, the second connecting member 250 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the second connecting member 250 can include an epoxy resin or a polyester resin having a relatively high elastic modulus.

[0235] Here, the epoxy resin can have an elastic modulus of about 5.0 GPa, and the polyester resin can have an elastic modulus of about 3.3 GPa.

[0236] Since the display device of FIG. 16 is not provided with the second connecting member 250 in the structure of the base material and the adhesive layer attached to the base material, but is composed of a single-layer adhesive layer, it can include a vibration device 200 having a thinner thickness compared to the display device of FIG. 15.

[0237] FIG. 17 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 17 is the same as the structure of FIG. 15 except that the first connecting member is composed of only a single adhesive layer, duplicate explanations will be omitted.

[0238] Referring to FIG. 17, the first connecting member 210 can be formed in a single structure composed of only an adhesive layer, rather than being composed of a base material and an adhesive layer. Here, the first connecting member 210 can include an adhesive layer having a higher elastic modulus than the adhesive layer formed together when the aforementioned first connecting member 210 and second connecting member 250 include a base material, or the adhesive layer formed together when the first to fourth protective members 220, 240, 260, 280 include a base material.

[0239] For example, the first connecting member 210 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the first connecting member 210 can include an epoxy resin or a polyester resin having a relatively high elastic modulus.

[0240] Here, the epoxy resin can have an elastic modulus of about 5.0 GPa, and the polyester resin can have an elastic modulus of about 3.3 GPa.

[0241] Since the display device of FIG. 17 is not provided with the structure of the base material and the adhesive layer attached to the base material, but is composed of a single-layer adhesive layer, it can include a vibration device 200 having a thinner thickness compared to the display device of FIG. 15.

[0242] FIG. 18 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 18 is the same as the structure of FIG. 15 except that only the first connecting member and the first connecting member are composed of only a single adhesive layer, duplicate descriptions will be omitted.

[0243] Referring to FIG. 18, the first connecting member 210 and the second connecting member 250 can be formed in a single structure composed of only an adhesive layer, rather than being composed of a base material and an adhesive layer. Here, the first connecting member 210 and the second connecting member 250 can include an adhesive layer having a higher elastic modulus than the adhesive layer formed together when the aforementioned first connecting member 210 and second connecting member 250 include a base material, or when the first to fourth protective members 220, 240, 260, 280 include a base material.

[0244] For example, the first connecting member 210 and the second connecting member 250 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the first connecting member 210 can include an epoxy resin or a polyester resin having a relatively high elastic modulus.

[0245] Here, the epoxy resin can have an elastic modulus of about 5.0 GPa, and the polyester resin can have an elastic modulus of about 3.3 GPa.

[0246] The display device of FIG. 18 is not provided with the first connecting member 210 and the second connecting member 250 in the structure of the base material and the adhesive layer attached to the base material, but is composed of a single-layer adhesive layer. Therefore, it can include a vibration device 200 having a thinner thickness compared to the display device of FIG. 15.

[0247] FIG. 19 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 19 is the same as the structure of FIG. 15 except that it is formed without the first protective member and the third protective member, duplicate explanations will be omitted.

[0248] Referring to FIG. 19, in the display device according to another embodiment of the present invention, the first protective member 220 located below the first vibration generator 230 is not formed, and the first connecting member 210 and the first vibration generator 230 are formed to be in direct contact with each other. Also, the third protective member 260 located below the second vibration generator 270 is not formed, and the second connecting member 250 and the second vibration generator 270 can be formed to be in direct contact with each other.

[0249] The display device of FIG. 19 can replace the function and structure of the first protective member 220 with the first connecting member 210, and replace the function and structure of the third protective member 260 with the second connecting member 250. By providing a structure in which the first protective member 220 and the third protective member 260 are deleted, the total thickness of the vibration device 200 can be reduced.

[0250] Therefore, the display device according to the embodiment of the present invention can provide a vibration device 200 having a thin thickness. As a result, the gap space (GS) between the vibration device 200 and the support member 300 can increase, and the sound pressure characteristics of the vibration device 200 can be improved. The change in the sound pressure characteristics due to the gap space (GS) between the vibration device 200 and the support member 300 will be described later with reference to FIGS. 25 and 26.

[0251] FIG. 20 is a cross-sectional view showing a display device according to another embodiment of the present invention. Since the display device of FIG. 20 is the same as the structure of FIG. 19 except that the second connecting member is composed of a single adhesive layer without a base material, duplicate explanations will be omitted.

[0252] In the display device of FIG. 20, the second connecting member 250 can be formed as a single structure composed only of an adhesive layer, rather than being composed of a base material and an adhesive layer. Here, the second connecting member 250 can include an adhesive layer having a higher elastic modulus than the adhesive layer formed together when the aforementioned first connecting member 210 and second connecting member 250 include a base material, or the adhesive layer formed together when the first to fourth protective members 220, 240, 260, 280 include a base material.

[0253] For example, the second connecting member 250 can include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the second connecting member 250 can include an epoxy resin or a polyester resin having a relatively high elastic modulus.

[0254] Here, the epoxy resin can have an elastic modulus of about 5.0 GPa, and the polyester resin can have an elastic modulus of about 3.3 GPa.

[0255] FIG. 21 is a cross-sectional view showing a display device according to another embodiment of the present invention. FIG. 21 may be the same as or similar to the structure of the display device of FIG. 19 except that the first connecting member 210 is composed of a single layer of an adhesive layer not including a base material. Since the above detailed description can be referred to, duplicate descriptions will be omitted here.

[0256] Referring to FIG. 21, a display device according to another embodiment of the present invention can include a display panel 100, a first vibration generator 230 disposed on or below the display panel 100, a second vibration generator 270 disposed so as to overlap the first vibration generator 230, a first connecting member 210 disposed between the first vibration generator 230 and the display panel 100, and a second connecting member 250 disposed between the first vibration generator 230 and the second vibration generator 270.

[0257] According to an embodiment of the present invention, the first connecting member 210 may be composed of a single layer of an adhesive layer without a base material and may be provided to be in direct contact with the first vibration generator 230.

[0258] The first connecting member 210 may be formed as a single structure composed only of an adhesive layer, rather than being composed of a base material and an adhesive layer. Here, the first connecting member 210 may include an adhesive layer having a higher elastic modulus than the adhesive layer formed together when the aforementioned first connecting member 210 and second connecting member 250 include a base material, or the adhesive layer formed together when the first to fourth protective members 220, 240, 260, and 280 include a base material.

[0259] For example, the first connecting member 210 may include epoxy, acrylic, silicone, or urethane, and the embodiments of the present invention are not limited thereto. For example, the first connecting member 210 may include an epoxy resin or a polyester resin having a relatively high elastic modulus.

[0260] Here, the epoxy resin may have an elastic modulus of about 5.0 GPa, and the polyester resin may have an elastic modulus of about 3.3 GPa.

[0261] FIG. 22 is a cross-sectional view showing a display device according to another embodiment of the present invention. FIG. 22 may be the same as or similar to the structure of the display device in FIG. 15 except that the second protective member 240 and the third protective member 260 (e.g., shown in FIG. 15) are not provided. Since the detailed description can be referred to, duplicate description will be omitted here.

[0262] Referring to FIG. 22, a display device according to another embodiment of the present invention may include a display panel 100, a first vibration generator 230 disposed on or below the display panel 100, a second vibration generator 270 disposed so as to overlap the first vibration generator 230, a first connecting member 210 disposed between the first vibration generator 230 and the display panel 100, and a second connecting member 250 disposed between the first vibration generator 230 and the second vibration generator 270.

[0263] In the display device of FIG. 22, the second protective member 240 located above the first vibration generator 230 is not formed, and the second connecting member 250 and the first vibration generator 230 are formed to be in direct contact with each other. The third protective member 260 located below the second vibration generator 270 is not formed, and the second connecting member 250 and the second vibration generator 270 can be formed to be in direct contact with each other.

[0264] The display device of FIG. 22 can replace the functions and structures of the second protective member 240 (FIG. 15) and the third protective member 260 with the second connecting member 250, and by providing a structure in which the second protective member 240 and the third protective member 260 (FIG. 15) are deleted, the total thickness of the vibration device 200 can be reduced.

[0265] Therefore, the display device according to the embodiment of the present invention in FIG. 22 can provide a vibration device 200 having a thin thickness, whereby the gap space (GS) between the vibration device 200 and the support member 300 can be increased, and the sound pressure characteristics of the vibration device 200 can be improved. The change in the sound pressure characteristics due to the gap space (GS) between the vibration device 200 and the support member 300 (FIG. 2) will be described later with reference to FIGS. 25 and 26.

[0266] FIG. 23 is a diagram showing the acoustic output characteristics of the display device according to FIGS. 3 and 15.

[0267] The characteristics of the acoustic output can be measured by an acoustic analysis device. The acoustic analysis device can be composed of a control personal computer (Control PC), a sound card for transmitting and receiving sound, an amplifier for amplifying and transmitting the sound generated from the sound card to the vibration device, and a microphone for collecting the sound generated on the display panel by driving the vibration device. The sound collected by the microphone is input to the control personal computer through the sound card, and this is confirmed by a control program to analyze the acoustic output characteristics of the vibration device.

[0268] For the measurement of acoustic output characteristics, the configuration of the vibrating device illustrated in FIGS. 3 and 15 is applied as it is. Instead of the display panel 100, an aluminum substrate is used as the diaphragm, and a vibrating device 200 including a first vibration generator 230 and a second vibration generator 270 with dimensions of 6 cm each horizontally and vertically is formed on the back of the diaphragm and prepared. Here, an input voltage of 5 Vrms was applied to each of the first vibration generator 230 and the second vibration generator 270, and the sound pressure (SPL; sound pressure level) was measured in the range of 100 to 10 kHz.

[0269] The solid line in FIG. 23 shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 3, and the dotted line in FIG. 23 shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 15. In FIG. 23, the horizontal axis represents the frequency (Frequency, Hz), and the vertical axis represents the sound pressure (Sound Pressure Level, dB).

[0270] Referring to FIG. 23, it can be seen that the vibrating device illustrated in FIG. 3 has a higher sound pressure in most frequency bands except for the frequency band near 2000 Hz compared to the vibrating device illustrated in FIG. 15. In the range of 150 to 8 kHz, the average sound pressure of the vibrating device in FIG. 3 was measured to be approximately 77 dB, and the vibrating device in FIG. 15 was measured to be approximately 68 dB. Referring to the measurement results in FIG. 23, the first vibration generator 230 is composed of a 1-3 composite structure including the first part 231a of the first vibrating part 231, and the second vibration generator 270 is composed of a 1-3 composite structure including the first part 271a of the second vibrating part 271. By forming the first protrusion 211a of the first connecting member 210 or the second protrusion 251a of the second connecting member 250 to overlap with the first part 231a of the first vibrating part 231 and the first part 271a of the second vibrating part 271, it can be seen that the sound pressure characteristics are improved.

[0271] FIG. 24 is a diagram showing the acoustic output characteristics of the display device according to FIGS. 16 to 19.

[0272] The characteristics of the acoustic output can be measured by an acoustic analysis device. The acoustic analysis device can be composed of a control personal computer (Control PC), a sound card for transmitting and receiving sound, an amplifier for amplifying and transmitting the sound generated from the sound card to a vibrating device, and a microphone for collecting the sound generated on the display panel by driving the vibrating device. The sound collected by the microphone is input to the control personal computer through the sound card, and this is confirmed by a control program to analyze the acoustic output characteristics of the vibrating device.

[0273] For measuring the acoustic output characteristics, the configuration of the vibrating device illustrated in FIGS. 16 to 19 was applied as it was, and an aluminum substrate was used as a diaphragm instead of the display panel 100, and a vibrating device 200 including a first vibration generator 230 and a second vibration generator 270 was formed and prepared with dimensions of 6 cm each in the horizontal and vertical directions on the back surface of the diaphragm. Here, an input voltage of 5 Vrms was applied to each of the first vibration generator 230 and the second vibration generator 270, and the sound pressure (SPL; sound pressure level) was measured in the range of 100 to 10 kHz.

[0274] The thick dotted line in FIG. 24 shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 16. The thin solid line shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 17. The thin dotted line shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 18. The thick solid line shows the acoustic output characteristics of the vibrating device including the first connecting member 210, the first vibration generator 230, the second connecting member 250, and the second vibration generator 270 illustrated in FIG. 19.

[0275] Referring to FIG. 24, in the range of 150 to 8 kHz, the average sound pressure of the vibration device in FIG. 16 was measured to be approximately 78.56 dB, the average sound pressure of the vibration device in FIG. 17 was measured to be approximately 81.57 dB, the average sound pressure of the vibration device in FIG. 18 was measured to be approximately 82.57 dB, and the average sound pressure of the vibration device in FIG. 19 was measured to be approximately 84.28 dB. Referring to the measurement results in FIG. 24, it can be seen that the sound pressure characteristics are improved by constructing the first connecting member 210 or the second connecting member 250 with a base material and an adhesive layer and removing some of the first to third protective members 220 to 260 shown in FIG. 19.

[0276] FIG. 25 is a diagram schematically showing an experimental environment implemented to confirm the sound pressure characteristics according to the presence or absence of a support member and the distance between the support member and the vibration device, and FIG. 26 is a frequency-sound pressure graph measured in the experimental environment of FIG. 25.

[0277] The characteristics of the acoustic output can be measured by an acoustic analyzer. The acoustic analyzer can be composed of a control personal computer (Control PC), a sound card for transmitting and receiving sounds, an amplifier for amplifying and transmitting the sound generated from the sound card to the vibration device, and a microphone for collecting the sound generated on the display panel by driving the vibration device. The sound collected by the microphone is input to the control personal computer through the sound card, and this is confirmed by a control program to analyze the acoustic output characteristics of the vibration device.

[0278] For measuring the acoustic output characteristics, after forming the configuration of the vibration device illustrated in FIG. 15 on the diaphragm 10, the distance (d) between the support member 30 and the vibration device 200 is adjusted to 100, 300, and 1400 μm, or the sound pressure output characteristics are measured under the condition without the support member 30. When the sound pressure characteristics under the condition without the support member 30 (illustrated by a thick solid line) are taken as 100%, the relative ratio is measured as a percentage of the remaining measured values.

[0279] Referring to FIG. 26, when the distance between the vibration device 200 and the support member 30 is 100 μm (illustrated by the thick dotted line), about 97.5% of the sound pressure characteristics are measured. When the distance between the vibration device 200 and the support member 30 is 300 μm (illustrated by the solid line), about 97.8% of the sound pressure characteristics are measured. When the distance between the vibration device 200 and the support member 30 is 1400 μm (illustrated by the dotted line), about 98.2% of the sound pressure characteristics are measured. Referring to FIG. 26, it can be seen that the sound pressure characteristics improve as the distance between the support member 30 and the vibration device 200 increases. Therefore, when selectively deleting the first protective member 220 to the third protective member 260 as in the display device shown in FIGS. 15 to 22, or when the first connecting member 210 or the second connecting member 250 is formed of a single adhesive and the thickness of the vibration device 200 is made thinner, it can be seen that the sound pressure characteristics improve.

[0280] The device according to the embodiment of the present invention can be applied to all electronic devices that use a display panel as an acoustic diaphragm. For example, the device according to the embodiment of the present invention can be applied to mobile devices, video phones, smart watches, wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, electronic notebooks, e-books, PMPs (portable multimedia players), PDAs (personal digital assistants), MP3 players, mobile medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation, vehicle navigation, vehicle display devices, TVs, wall paper display devices, signage devices, game devices, notebook computers, monitors, cameras, video cameras, and home appliances. And the vibration device according to the present invention can be applied to a light emitting diode lighting device, an organic light emitting lighting device, or an inorganic light emitting lighting device. When the vibration device is applied to a lighting device, the vibration device can serve as both lighting and a speaker. Also, when the vibration device according to the present invention is applied to a mobile device or the like, it can be one or more of a speaker, a receiver, and a haptic, and the embodiments of the present invention are not limited thereto. As another example, the vibration device according to the present invention can be applied to a non-display device or an object to be vibrated instead of a display device. For example, when the vibration device is applied to a non-display device or an object to be vibrated that is not a display device, it can be a vehicle speaker or a speaker embodied together with lighting, and the embodiments of the present invention are not limited thereto.

[0281] The vibration device and the device according to the embodiment of the present invention can be described as follows.

[0282] The vibration device according to an embodiment of the present invention includes a first vibration generator and a first connecting member disposed on a first surface of the first vibration generator. The first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts.

[0283] According to some embodiments of the present invention, the first connecting member may include a first base material and a first adhesive layer covering an upper surface (or top surface) and a lower surface (or bottom surface) of the first base material.

[0284] According to some embodiments of the present invention, the first base material further includes a first protrusion protruding from an upper surface (or top surface) and a lower surface (or bottom surface), and the first protrusion can overlap with a plurality of inorganic material parts of the first vibration part.

[0285] According to some embodiments of the present invention, the first connecting member further includes first highly elastic members formed on the upper surface (or top surface) and the lower surface (or bottom surface) of the first base material, respectively, and the first highly elastic members can overlap with a plurality of inorganic material parts of the first vibration part.

[0286] According to some embodiments of the present invention, the first connecting member further includes a first highly elastic filler disposed in the first adhesive layer, and the first highly elastic filler can overlap with a plurality of inorganic material parts of the first vibration part.

[0287] According to some embodiments of the present invention, it further includes a first protection member disposed between the first vibration generator and the first connecting member. The first protection member includes a first base material and a first adhesive layer disposed on a first surface of the first base material, and the first adhesive layer can be formed to contact the first vibration generator.

[0288] According to some embodiments of the present invention, the first base material further includes a first protrusion formed toward the first vibration generator, and the first protrusion can overlap with a plurality of inorganic material parts of the first vibration part.

[0289] According to some embodiments of the present invention, the first protective member further includes a first highly elastic member formed on the first surface of the first protective member, and the first highly elastic member can overlap with a plurality of inorganic material portions of the first vibrating portion.

[0290] According to some embodiments of the present invention, the first protective member further includes a first highly elastic filler disposed in the first adhesive layer, and the first highly elastic filler can overlap with a plurality of inorganic material portions of the first vibrating portion.

[0291] According to some embodiments of the present invention, it can further include a second connecting member disposed on the second surface opposite to the first surface of the first vibration generator, and a second vibration generator disposed on the first surface above the second connecting member.

[0292] According to some embodiments of the present invention, the second connecting member can include a second base material, and a second adhesive layer covering the upper surface (or top surface) and the lower surface (or bottom surface) of the base material.

[0293] According to some embodiments of the present invention, the second base material of the second connecting member further includes second protruding portions protruding from the upper surface (or top surface) and the lower surface (or bottom surface), and the second protruding portions can overlap with a plurality of inorganic material portions of the second vibrating portion of the second vibration generator.

[0294] According to some embodiments of the present invention, a plurality of inorganic material portions of the first vibration generator and a plurality of inorganic material portions of the second vibration generator can overlap with each other.

[0295] The vibration device according to an embodiment of the present invention includes a first vibration generator, a first connecting member disposed on the first surface of the first vibration generator, a second vibration generator disposed on the second surface opposite to the first surface of the first vibration generator and overlapping with the first vibration generator, and a second connecting member disposed between the first vibration generator and the second vibration generator.

[0296] According to some embodiments of the present invention, the first connecting member includes a first base material, a first adhesive layer of the first connecting member covering the first surface of the first base material, and a second adhesive layer of the second connecting member covering the second surface opposite to the first surface of the first base material, and the second connecting member may be composed of a single adhesive layer.

[0297] According to some embodiments of the present invention, the second connecting member includes a second base material, a first adhesive layer of the second connecting member covering the first surface of the second base material, and a second adhesive layer of the second connecting member covering the second surface opposite to the first surface of the second base material, and the first connecting member may be composed of a single adhesive layer.

[0298] According to some embodiments of the present invention, the first connecting member and the second connecting member may be composed of a single adhesive layer.

[0299] According to some embodiments of the present invention, the first connecting member includes a first base material, a first adhesive layer of the first connecting member covering the first surface of the first base material, and a second adhesive layer of the first connecting member covering the second surface opposite to the first surface of the first base material, and the second connecting member may include a second base material, a first adhesive layer of the second connecting member covering the first surface of the second base material, and a second adhesive layer of the second connecting member covering the second surface opposite to the first surface of the second base material.

[0300] According to some embodiments of the present invention, the second adhesive layer of the first connecting member can be in contact with the first vibration generator, and the second adhesive layer of the second connecting member can be in contact with the second vibration generator.

[0301] According to some embodiments of the present invention, the second adhesive layer of the first connecting member is in contact with the first vibration generator, and the second connecting member can be in contact with the second vibration generator.

[0302] According to some embodiments of the present invention, the first connecting member is in contact with the first vibration generator, and the second adhesive layer of the second connecting member can be in contact with the second vibration generator.

[0303] According to some embodiments of the present invention, the first adhesive layer of the second connecting member contacts the first vibration generator, and the second adhesive layer of the second connecting member can contact the first vibration generator.

[0304] The apparatus according to an embodiment of the present invention includes a vibration object and a vibration generating device located on one surface of the vibration object. The vibration device includes a first vibration generator and a first connecting member disposed on the first surface of the first vibration generator. The first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts.

[0305] According to some embodiments of the present invention, the vibration object can be one or more of a display panel having pixels for displaying an image, a screen panel onto which an image is projected from a display device, an illumination panel, a vibration plate, wood, plastic, glass, cloth, an interior material of an automobile, a glass window of an automobile, an interior ceiling of a building, a glass window of a building, an interior material of an aircraft, and a glass window of an aircraft.

[0306] According to some embodiments of the present invention, it can further include a support member disposed on the back surface of the display panel.

[0307] The present invention described above is not limited to the foregoing embodiments and the attached drawings, and it will be apparent to those of ordinary skill in the art in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible without departing from the technical idea of the present invention. Therefore, the scope of the present invention is indicated by the claims described below, and all changes or modified forms derived from the meaning and scope of the claims and the equivalent concept thereof should be construed as being included within the scope of the present invention.

Description of Reference Numerals

[0308] 100: Display panel 200: Vibration device 210: First connecting member 220: First protection member 230: First vibration generator 240: Second protection member 250: Second connecting member 260: Third protection member 270: Second vibration generator 280: Fourth protection member 300: Support member 400: Middle frame

Claims

1. A first vibration generator, a protective member on the first surface side of the first vibration generator or on the second surface side of the first vibration generator facing the first surface side of the first vibration generator, a first connecting member on the first surface side of the first vibration generator, a second connecting member on the second surface side of the first vibration generator, and a second vibration generator in the second connecting member, wherein the first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts, the protective member includes a base material and an adhesive layer on the first surface side of the base material, the adhesive layer is in contact with the first vibration generator, the base material includes at least one protruding part protruding toward the first vibration generator, the at least one protruding part overlaps with at least one of the plurality of inorganic material parts of the first vibration part, a vibration device.

2. A first vibration generator, a protective member on the first surface side of the first vibration generator or on the second surface side of the first vibration generator facing the first surface side of the first vibration generator, a first connecting member on the first surface side of the first vibration generator, a second connecting member on the second surface side of the first vibration generator, and a second vibration generator in the second connecting member, wherein the first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts, the protective member includes a base material and an adhesive layer on the first surface side of the base material, the adhesive layer is in contact with the first vibration generator, the protective member further includes at least one highly elastic member on the first surface of the base material, the at least one highly elastic member overlaps with at least one of the plurality of inorganic material parts of the first vibration part, a vibration device.

3. A first vibration generator, a protective member on the first surface side of the first vibration generator or on the second surface side of the first vibration generator facing the first surface side of the first vibration generator, a first connecting member on the first surface side of the first vibration generator, a second connecting member on the second surface side of the first vibration generator, and a second vibration generator in the second connecting member, wherein the first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts, the protective member includes a base material and an adhesive layer on the first surface side of the base material, the adhesive layer is in contact with the first vibration generator, The protective member further includes at least one highly elastic filler disposed in the adhesive layer, The at least one highly elastic filler is a vibration device that overlaps at least one of the plurality of inorganic material portions of the first vibration portion. **Claim 4** The second connecting member a second base material, and The vibration device according to any one of claims 1 to 3, including at least one second adhesive layer covering at least one of the upper surface and the lower surface of the second base material. **Claim 5** The second vibration generator includes a second vibration portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion between the plurality of inorganic material portions, The plurality of inorganic material portions of the second vibration generator overlap the plurality of inorganic material portions of the first vibration generator respectively. The vibration device according to claim 4. **Claim 6** The second base material includes at least one second protruding portion protruding from at least one of the upper surface and the lower surface of the second base material, The at least one second protruding portion overlaps at least one of the plurality of inorganic material portions of the second vibration portion. The vibration device according to claim 5. **Claim 7** The second connecting member has a higher elastic modulus than the second base material, and further includes at least one second highly elastic member provided on at least one of the upper surface and the lower surface of the second base material, The at least one second highly elastic member overlaps at least one of the plurality of inorganic material portions of the second vibration portion. The vibration device according to claim 5. **Claim 8** The second connecting member has a higher elastic modulus than the second base material, and further includes at least one second highly elastic filler disposed in the at least one second adhesive layer, The at least one second highly elastic filler overlaps at least one of the plurality of inorganic material portions of the second vibration portion. The vibration device according to claim 5. **Claim 9** The plurality of inorganic material portions of each of the first vibration generator and the second vibration generator are represented by the following formula 1. The vibration device according to claim 5. [Formula 1] (Pb A-B C B )(Mg 1 / 3 Nb 2 / 3 )a(Ni 1 / 3 Nb 2 / 3 ) b Zr c Ti d )O 3 In formula 1, C can be one of calcium (Ca), strontium (Sr), and barium (Ba), a + b + c + d = 1, 0.02 ≦ B ≦ 0.20, 0.80 ≦ A - B ≦ 0.98, 0.05 ≦ a ≦ 0.25, 0.05 ≦ b ≦ 0.25, 0.10 ≦ c ≦ 0.50, 0.10 ≦ d ≦ 0.

50. **Claim 10** The first connecting member a base material A first adhesive layer covering the first surface side of the base material, and including a second adhesive layer covering the second surface side of the base material facing the first surface side of the base material, the second connecting member is composed of a single adhesive layer, the first surface side of the first vibration generator is located further away from the second vibration generator than the second surface side of the first vibration generator, the vibration device according to any one of claims 1 to 3.

11. the second adhesive layer of the first connecting member contacts the first vibration generator, the single adhesive layer of the second connecting member contacts the second vibration generator, the vibration device according to claim 10.

12. the first connecting member is composed of a single adhesive layer, the second connecting member is a base material, a first adhesive layer covering the first surface side of the base material, and including a second adhesive layer covering the second surface side of the base material facing the first surface side of the base material, the first surface side of the first vibration generator is located further away from the second vibration generator than the second surface side of the first vibration generator, the vibration device according to any one of claims 1 to 3.

13. the single adhesive layer of the first connecting member contacts the first vibration generator, the second adhesive layer of the second connecting member contacts the second vibration generator, the vibration device according to claim 12.

14. each of the first connecting member and the second connecting member is a base material, a first adhesive layer covering the first surface side of the base material, and including a second adhesive layer covering the second surface side of the base material opposite to the first surface side of the base material, the vibration device according to any one of claims 1 to 3.

15. the second adhesive layer of the first connecting member contacts the first vibration generator, the second adhesive layer of the second connecting member contacts the second vibration generator, the vibration device according to claim 14.

16. An electronic device including a vibration device, wherein the vibration device includes a first vibration generator, and a protective member on the first surface side of the first vibration generator or on the second surface side of the first vibration generator facing the first surface side of the first vibration generator, the first vibration generator includes a first vibration part including a plurality of inorganic material parts having piezoelectric characteristics and an organic material part between the plurality of inorganic material parts, the protective member includes a base material and an adhesive layer on the first surface side of the base material, the adhesive layer contacts the first vibration generator, the base material includes at least one protruding part protruding toward the first vibration generator, The at least one protruding portion overlaps at least one of the plurality of inorganic material portions of the first vibrating portion. The electronic device further includes a vibrating object configured to vibrate by the vibrating device to generate sound, the electronic device. **Claim 17** An electronic device including a vibrating device, wherein the vibrating device a first vibration generator, and a protective member on a first surface side of the first vibration generator or on a second surface side of the first vibration generator facing the first surface side of the first vibration generator, The first vibration generator includes a first vibrating portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion between the plurality of inorganic material portions. The protective member includes a base material and an adhesive layer on a first surface side of the base material. The adhesive layer is in contact with the first vibration generator. The protective member further includes at least one highly elastic member on the first surface of the base material. The at least one highly elastic member overlaps at least one of the plurality of inorganic material portions of the first vibrating portion. The electronic device further includes a vibrating object configured to vibrate by the vibrating device to generate sound, the electronic device. **Claim 18** An electronic device including a vibrating device, wherein the vibrating device a first vibration generator, and a protective member on a first surface side of the first vibration generator or on a second surface side of the first vibration generator facing the first surface side of the first vibration generator, The first vibration generator includes a first vibrating portion including a plurality of inorganic material portions having piezoelectric characteristics and an organic material portion between the plurality of inorganic material portions. The protective member includes a base material and an adhesive layer on a first surface side of the base material. The adhesive layer is in contact with the first vibration generator. The protective member further includes at least one highly elastic filler disposed in the adhesive layer. The at least one highly elastic filler overlaps at least one of the plurality of inorganic material portions of the first vibrating portion. The electronic device further includes a vibrating object configured to vibrate by the vibrating device to generate sound, the electronic device. **Claim 19** The vibration object is one of a display panel including a plurality of pixels configured to display an image, a screen panel onto which an image is projected from a display device, an illumination panel, a diaphragm, a wood panel, a plastic panel, a glass panel, a cloth panel, an interior material of an automobile, a glass window of an automobile, an interior ceiling of a building, a glass window of a building, an interior material of an aircraft, and a glass window of an aircraft, and is the electronic device according to any one of claims 16 to 18.

20. further comprising a support member disposed on the back surface of the vibration object, The vibration device is between the support member and the vibration object, and is the electronic device according to any one of claims 16 to 18.

21. The plurality of inorganic material portions are represented by the following formula 1, and are the electronic device according to any one of claims 16 to 18. [Formula 1] (Pb A-B C B )(Mg 1 / 3 Nb 2 / 3 )a(Ni 1 / 3 Nb 2 / 3 ) b Zr c Ti d )O 3 In Formula 1, C can be one of calcium (Ca), strontium (Sr), and barium (Ba), a + b + c + d = 1, 0.02 ≦ B ≦ 0.20, 0.80 ≦ A - B ≦ 0.98, 0.05 ≦ a ≦ 0.25, 0.05 ≦ b ≦ 0.25, 0.10 ≦ c ≦ 0.50, and 0.10 ≦ d ≦ 0.50.

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