KR20190000462A - Display apparatus - Google Patents

Abstract

A display device according to an example of the present application includes a display panel for displaying an image and at least one sound output member attached to the front face of the display panel by the medium of an adhesive member. So, provided is an effect of enhancing the immersion feeling of a viewer who views the image of the display device by matching the image of the display device to a location where sound is generated.

Description

DISPLAY APPARATUS

The present invention relates to a display device, and more particularly, to a display device capable of generating sound.

Recently, as the information age has come to the age of information, a display field for visually expressing electrical information signals has been rapidly developed. In response to this, various display devices having excellent performance in thinning, light weighting, Is being developed.

Specific examples of such a display device include a liquid crystal display device (LCD), a field emission display device (FED), and an organic light emitting display device (OLED) have.

The liquid crystal display device includes an array substrate including a thin film transistor, an upper substrate including a color filter and / or a black matrix, and a liquid crystal layer between the array substrate and the upper substrate. The alignment of the liquid crystal layer is adjusted according to the electric field applied between two electrodes in the pixel region, and the transmittance of light is controlled according to the arrangement state to display an image.

The organic light emitting display device has attracted a great deal of attention because it has a response speed higher than that of other display devices, and has a high luminous efficiency, luminance, and viewing angle.

Generally, the display device displays an image on all of the display panels, but a separate speaker must be provided in order to provide sound. When the speaker is installed on the display device, the direction of sound generated through the speaker is the rear of the display panel, which is not the front of the display panel on which the image is displayed, or the bottom of the display panel. There is a problem that the viewer is prevented from being immersed in watching the image.

Further, since the sound generated through the speaker advances to the rear of the display panel or to the bottom of the display panel, there is a problem that sound quality is deteriorated due to interference with sound reflected from the wall or the floor.

When a speaker included in a set device such as a TV or the like is constituted, the speaker occupies a certain space, so that there arises a problem that the design and the space arrangement of the set device are restricted.

Accordingly, the inventors of the present application recognized the above-mentioned problems, and various experiments were conducted to improve the sound quality of the sound when the image was viewed from the front of the display panel, . Through various experiments, it is possible to generate sound such that the direction of sound progresses to the front of the display panel, and a new structure display device capable of improving the sound quality of the sound is realized.

The present invention provides a display device capable of outputting sound in a front direction of a display panel.

SUMMARY OF THE INVENTION The present invention provides a display device that maximizes the sense of reality and immersion by matching the positions where images and sound are generated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a display device which improves design aesthetics by omitting a space in which a speaker is disposed separately from an area of a display panel.

The solutions according to the present application are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

The display device according to the present application includes a display panel for displaying an image and at least one sound output member attached to the front surface of the display panel via an adhesive member, and the sound output member can be transparent.

A display device according to the present application displays an image and is arranged on a display panel including a first area and a second area, a first area and a second area to output sound, and includes at least one piezoelectric element One acoustic output member, and a partition between the first region and the second region.

Specific details of other examples are included in the detailed description and drawings.

The display device according to the present application can generate sound such that the direction of sound propagation is the front face of the display panel. Therefore, it is possible to improve the immersion feeling of the viewer who watches the video of the display device by matching the video and sound generation positions of the display device.

In addition, since the display device according to the present application constitutes the piezoelectric element attached to the front surface of the display panel, it is not necessary to separately constitute a speaker, thereby improving the degree of freedom in arranging the speaker and improving the design aesthetics of the set device .

In addition, the display device according to the present application can form a partition between at least one piezoelectric element disposed on the front surface of the display panel, thereby separating the sound by the partition, so that a stereo sound can be realized and an acoustic output characteristic can be improved .

Further, the display device according to the present application further includes a protective member for protecting at least one piezoelectric element, so that damage and malfunction of the display device can be prevented.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

The scope of the claims is not limited by the matters described in the contents of the invention, as the contents of the invention described in the problems, the solutions to the problems and the effects to be solved do not specify essential features of the claims.

1A is a view showing a display device according to an example of the present application.
FIG. 1B is a cross-sectional view taken along the line I-I 'of FIG. 1A.
2A is a plan view showing a display device according to another example of the present application.
FIG. 2B is a cross-sectional view taken along line II-II 'of FIG. 2A.
3A is a plan view showing a display device according to another example of the present application.
3B is a cross-sectional view taken along the cutting line III-III 'of FIG. 3A.
4A and 4B are sectional views for explaining the vibration of the sound output member in the display device according to the example of the present application.
5A is a plan view for explaining a structure of a wiring connected to an acoustic output member in a display device according to an example of the present application.
5B is a cross-sectional view taken along line IV-IV 'of FIG. 5A.
6 is a view for explaining a protective member disposed on the sound output member in the display device according to the example of the present application.
7 is a view for explaining a manufacturing method of a display device in which a display module is bonded onto a display substrate in a display device according to the example of the present application.
8A and 8B are plan views showing a display device according to another example of the present application.
Fig. 9 is a view for explaining a partition disposed between sound output members in the display device according to the example of the present application. Fig.
FIG. 10 is a diagram for explaining a driving circuit for driving the sound output member in the display device according to the example of the present application. FIG.

Brief Description of the Drawings The advantages and features of the present application, and how to accomplish them, will become apparent upon reference to the following detailed description, taken in conjunction with the accompanying drawings. It will be understood, however, that the invention is not limited to the examples disclosed herein but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. Are provided to fully disclose the scope of the invention, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like described in the drawings for describing the example of the present application are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the description of the present application, a detailed description of known related arts will be omitted if it is determined that the gist of the present application may be unnecessarily obscured. In the case where the term "including", "having", or "being done" is used in the present application, other parts may be added unless "~" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description.

In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

In the case of a description of a temporal relationship, for example, if the temporal relationship is described by 'after', 'after', 'after', 'before', etc., May not be continuous unless they are not used.

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

In describing the components of the present application, the terms first and second can be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

The "display device" in the present application may include a display device such as a liquid crystal module (LCM) or an organic light emitting display module (OLED Module) including a display panel and a driver for driving the display panel . And other equipment such as notebook computers, televisions, computer monitors, automotive displays, or other forms of vehicles, including complete products or final products including LCM, OLED modules, or a set electronic device or set device such as a mobile electronic device such as a display or smart phone or an electronic pad.

Accordingly, the display device of the present application may include a display device itself, such as an LCM, an OLED module or the like, and an application device including an LCM, an OLED module, or the like, or a set device which is an end consumer device.

In some cases, the LCM and the OLED module constituted by the display panel and the driving unit and the like may be represented by the narrow "display device", and the electronic device as the finished product including the LCM and the OLED module may be represented by the "set device" . For example, the display apparatus of the consultation includes a display panel of liquid crystal (LCD) or organic light emitting (OLED) and a source PCB which is a control section for driving the display panel, and the set apparatus is electrically connected to the source PCB, And a set PCB that is a set control unit that controls the entire system.

The display panel used in this example may be any type of display panel such as a liquid crystal display panel, an OLED (Organic Light Emitting Diode) display panel, and an electroluminescent display panel. The present invention is not limited to a specific display panel capable of generating sound by being vibrated by the sound generator. The display panel used in the display device according to the example of the present invention is not limited to the shape and size of the display panel.

For example, when the display panel is a liquid crystal display panel, it includes a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. An array substrate including a thin film transistor serving as a switching element for adjusting light transmittance in each pixel, an upper substrate including a color filter and / or a black matrix, and a liquid crystal layer formed between the array substrate and the upper substrate As shown in FIG.

When the display panel is an organic light emitting (OLED) display panel, it may include a plurality of gate lines and data lines, and pixels formed at intersections of the gate lines and the data lines. An array substrate including a thin film transistor which is a device for selectively applying a voltage to each pixel, an organic light emitting element (OLED) layer on the array substrate, and an encapsulating substrate Or an encapsulation substrate, or the like. The sealing substrate protects the thin film transistor, the organic light emitting element layer, and the like from external impact and can prevent water or oxygen from penetrating into the organic light emitting element layer. And, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer, or the like.

The display panel may further include a backing such as a metal plate attached to the display panel. The present invention is not limited to the metal plate but may include other structures.

In the present application, the display panel may 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 may be implemented between the occupants of two front seats so that the vibrations of the display panel are propagated towards the interior of the vehicle. Thus, the audio experience in the vehicle can be improved compared to having a speaker only on the interior sides of the vehicle.

Each of the features of the various embodiments of the present application may be combined or combined with each other partially or entirely, technically various interlocking and driving are possible, and the examples may be independently performed with respect to each other, .

Hereinafter, an example of the present application will be described in detail with reference to the accompanying drawings and examples.

FIG. 1A is a view showing a display device according to an example of the present application, and FIG. 1B is a cross-sectional view taken along a line I-I 'shown in FIG. 1A.

1A and 1B, a display device includes a display panel 100, an adhesive member 200, and an acousto-optic output member 300.

The display panel 100 displays an image and can be implemented as any type of display panel such as a liquid crystal display panel, an organic light emitting (OLED) display panel, and an electroluminescent display panel. have.

The adhesive member 200 is disposed on a part of the front surface of the display panel 100 and has transparency. The adhesive member 200 may adhere the front surface of the display panel 100 and the rear surface of the sound output member 300. The adhesive member 200 may be disposed corresponding to the number, size, and position of the sound output member 300. When a plurality of the adhesive members 200 are realized, the plurality of adhesive members 200 may be spaced from each other and have different adhesive strengths. The adhesive force of the adhesive member 200 can be adjusted according to the shape, size, material, position, and acoustic characteristics of the acoustic output member 300. According to one example, the adhesive member 200 can be realized with a transparent adhesive material having excellent light transmittance. For example, the adhesive member 200 may be an adhesive film or an optical clear adhesive (OCA), an optically clear resin (OCR), or a pressure sensitive adhesive.

The sound output member 300 has transparency and is attached to a part of the front surface of the display panel 100 via the adhesive member 200. The sound output member 300 is attached to the front surface of the display panel 100 and has transparency for transmitting the image of the display panel 100. [ Therefore, the sound output member 300 can be realized as a material having a high light transmittance, and can transmit an image of the display panel 100. The sound output member 300 can vibrate according to the frequency input to output sound. When a plurality of the sound output members 300 are implemented, the plurality of sound output members 300 may be spaced from each other and may have different acoustic characteristics. The acoustic characteristics of the acoustic output member 300 can be determined according to shape, size, material, frequency input, and adhesive force of the adhesive member 200.

The acoustic output member 300 includes at least one piezoelectric element, and at least one piezoelectric element 300 includes a strained vibrational layer, at least one first transparent electrode, and at least one second transparent electrode. The deformation vibration layer has transparency and can output sound through the vibration generated according to the deformation. For example, the deformation vibration layer may vibrate according to expansion and contraction to output sound, or vibrate according to bending to output sound. According to an example, when the deformed vibration layer vibrates according to the expansion and contraction, the acoustic output member 300 can output a middle tone, and when the deformed vibration layer vibrates according to bending, the acoustic output member 300 can output a low tone .

The piezoelectric element refers to a device having a property of generating a potential difference when an external force is applied and generating a potential difference when a voltage is applied, that is, a piezoelectric effect. In one example, a piezoelectric element may be implemented as a corrected, tourmaline, barium titanate as selyeom (BaTiO3), ammonium dihydrogenphosphate _{(NH 4 H 2 PO 4)} , pressure ceramics.

Further, the sound output member 300 may be made of an insulating elastic material such as silicon, acrylic, or urethane, or an insulating elastic material such as polyvinylidene fluoride (PVDF) or PZT (lead zirconate titanate; solid solution of zirconate PbZrO ₃ and titanate PbTiO ₃ solid solution) It can be realized through a piezoelectric polymer material. PVDF contains PVDF-TrFE (polyvinylidene fluoride trifluoroethylene) and has a material characteristic that is easy to fabricate in a flexible film form.

The deformation vibration layer may have a transparent and constant thickness and length. At least one first transparent electrode may be disposed between the front surface of the display panel 100 and one surface of the deformation vibration layer and at least one second transparent electrode may be disposed on the other surface of the deformation vibration layer opposite to one surface of the deformation vibration layer. For example, the strained vibrational layer may have first and second transparent electrodes attached to both sides thereof, and the first and second transparent electrodes may receive a voltage from an external circuit. The acoustic output member 300 can vibrate according to an electric field by an inverse piezoelectric effect when a voltage is applied to the transparent electrode. For example, the display device can control the vibration (or the output of sound) of the sound output member 300 by controlling the voltage provided to the sound output member 300.

The deformation vibration layer is deformed in at least one of a thickness direction and a longitudinal direction according to a voice signal applied to the first transparent electrode and the second transparent electrode, and can output sound through the vibration according to the deformation. Specifically, the deformation vibration layer expands and contracts in at least one of the thickness direction and the longitudinal direction to vibrate, thereby outputting sound, or vibrated while vibrated in the thickness direction, thereby outputting sound. According to an example, when the deformed vibrating layer vibrates and contracts in at least one of a thickness direction and a length direction, the acoustic output member 300 can output a high sound. When the deformed vibrating layer is vibrated in the thickness direction, The output member 300 can output a low sound.

The display device attaches the sound output member 300 to the front surface of the display panel 100 so that the image of the display panel 100 and the sound generation position through the sound output member 300 coincide with each other, It is possible to improve the immersion feeling of viewers watching the video. Further, since the display device does not need to constitute a speaker separately by constituting the acoustic output member 300 attached to the front surface of the display panel 100, it is possible to improve the degree of freedom in arranging the speaker and improve the design aesthetics of the set device .

FIG. 2A is a plan view showing a display device according to another example of the present application, and FIG. 2B is a sectional view taken along a cutting line II-II 'in FIG. 2A.

2A and 2B, the acoustic output member 300 includes a plurality of piezoelectric elements, and the adhesive member 200 may also be disposed in a plurality corresponding to the plurality of piezoelectric elements 300. [ The plurality of piezoelectric elements 300 can be arranged as needed to improve the acoustic characteristics of the display device.

Each of the plurality of adhesive members 200 is spaced from each other and each of the plurality of piezoelectric elements 300 corresponding to each of the plurality of adhesive members 200 can be attached to the display panel 100. The shape and position of each of the plurality of adhesive members 200 may depend on the shape and position of each of the plurality of piezoelectric elements 300. In addition, each of the plurality of adhesive members 220 may have a different adhesive force depending on the acoustic characteristics of each of the plurality of corresponding piezoelectric elements 300. The adhesive force of each of the plurality of adhesive members 220 can be adjusted so that each of the plurality of piezoelectric elements 300 can output a sound of a high frequency range or a low frequency sound.

Each of the plurality of piezoelectric elements 300 is spaced apart from each other and can be independently driven according to a frequency input corresponding to each of the plurality of piezoelectric elements 300. Each of the plurality of piezoelectric elements 300 may or may not be provided with a frequency input for outputting sound corresponding to the image of the display panel 100. For example, the display device may select the sound output member 300 to output sound corresponding to the image of the display panel 100, and may provide a frequency input to the sound output member 300.

According to an example, the acoustic output member 300 includes two piezoelectric elements 300, and each of the two piezoelectric elements 300 may be provided on both sides of the display panel 100. [ For example, each of the two piezoelectric elements 300 may be provided in the left region and the right region of the display panel 100. The piezoelectric element 300 disposed on the left side region of the display panel 100 is connected to a sound source (e.g., a machine including a person, an animal, a speaker, or other sound generating object) in the image of the display panel 100 It can be driven when it is located on the left side. The piezoelectric element 300 disposed on the right side of the display panel 100 can be driven when the sound source is located on the right side of the image of the display panel 100. [

According to another example, the acoustic output member 300 includes four piezoelectric elements 300, and each of the four piezoelectric elements 300 may be provided on both upper and lower sides of the display panel 100. [ For example, each of the four piezoelectric elements 300 may be provided in the upper left, upper right, lower left, and lower right regions of the display panel 100. The piezoelectric element 300 disposed on the upper left region of the display panel 100 may be connected to a sound source (e.g., a machine including a person, an animal, a speaker, or other sound generating object) Can be driven when it is located on the upper left side. The piezoelectric element 300 disposed on the upper right area of the display panel 100 may be driven when the sound source is located on the upper right side of the image of the display panel 100. [ The piezoelectric elements 300 disposed on the lower left and lower right sides of the display panel 100 may be driven corresponding to the positions of the sound sources of the image of the display panel 100. [

FIG. 3A is a plan view showing a display device according to another example of the present application, and FIG. 3B is a sectional view taken along a cutting line III-III 'in FIG. 3A.

Referring to FIGS. 3A and 3B, the display panel 100 includes a first area and a second area. For example, the second area of the display panel 100 corresponds to a central area of the display panel 100, and the first area may correspond to a peripheral area excluding the second area.

The adhesive member 200 includes a first adhesive member 210 and a second adhesive member 220. The first adhesive member 210 is interposed between the first piezoelectric element 310 and the display panel 100 and the second adhesive member 220 is interposed between the second piezoelectric element 320 and the display panel 100. [ And may have an adhesive force different from that of the first adhesive member 210. For example, the first adhesive member 210 attaches the first piezoelectric element 310 to the display panel 100, and the second adhesive member 220 attaches the second piezoelectric element 320 to the display panel 100, As shown in Fig.

The first adhesive member 210 may have a first adhesive force and the second adhesive member 220 may have a second adhesive force that is stronger than the first adhesive force. Here, each of the first and second adhesive forces may be adjusted according to the shape, size, material, position, and acoustic characteristics of the sound output member 300. For example, the first adhesive force may correspond to a soft adhesive force, and the second adhesive force may correspond to a hard adhesive force.

Here, the magnitudes of the first adhesive force and the second adhesive force are relatively determined in the display device, and are not limited to absolute values. For example, when different first display devices and second display devices are implemented according to various embodiments of the display device, the second adhesive force of the second adhesive member 220 of the first display device may be different from that of the first display device The second adhesive force of the second adhesive member 220 of the first display device is weaker than the first adhesive force of the first adhesive member 210 of the second display device It is possible.

The acoustic output member 300 includes a first piezoelectric element 310 and a second piezoelectric element 320. The first piezoelectric element 310 is disposed in the first area of the display panel 100 and the second piezoelectric element 320 is disposed in the second area different from the first area of the front surface of the display panel 100 . According to an example, the second area of the front surface of the display panel 100 corresponds to a central area of the front surface of the display panel 100, and the first area may correspond to a peripheral area excluding the second area. According to an example, the first piezoelectric element 310 disposed in the first region outputs a middle tone, and the second piezoelectric element 320 disposed in the second region outputs a low tone.

The first piezoelectric element 310 may have a first size and the second piezoelectric element 320 may have a second size that is larger than the first size. The first piezoelectric element 310 is attached to the front surface of the display panel 100 through the first adhesive member 210 and the second piezoelectric element 320 is attached to the display panel 100 through the second adhesive member 220. [ As shown in Fig. According to one example, the first adhesive member 210 may have a soft adhesive force for attaching the first piezoelectric element 310, and the second adhesive member 220 may have a soft adhesive force for attaching the second piezoelectric element 320 It can have a hard adhesive force.

Each of the first and second piezoelectric elements 310 and 320 can output sounds having different frequency bands. According to an example, the first piezoelectric element 310 generates sound of a high frequency range and the second piezoelectric element 320 may generate low frequency sounds. For example, the bass band corresponds to the sound having a frequency of 20 Hz to 200 Hz, the middle band corresponds to the sound having the frequency of 200 Hz to 3 kHz, and the high frequency band corresponds to the sound having the frequency higher than 3 kHz, no.

According to an example, the second piezoelectric element 320 may be disposed in a central region of the display panel 100, and the first piezoelectric element 310 may be disposed to be symmetrical with respect to the second piezoelectric element 320. For example, the second piezoelectric element 320 can output low-frequency sound in the central region of the display panel 100, and the first piezoelectric element 310 can output sound in the peripheral region of the second piezoelectric element 320 It is possible to output the sound of the mid band. In addition, each of the plurality of second piezoelectric elements 320 can output sounds of different pre-bands, and can output stereo sound by left and right acoustic separation.

In addition, since the size of the second piezoelectric element 320 is larger than that of the first piezoelectric element 310, the display device outputs the sound of the same amplitude to each of the first and second piezoelectric elements 310 and 320 It is possible to stably output the low-frequency sound through the second piezoelectric element 320.

Accordingly, the display device is disposed on the front surface of the display panel 100, and constitutes the first piezoelectric element 310 that generates sound of the second band and the second piezoelectric element 320 that generates acoustic of the low sound range, It is possible to provide excellent acoustic output characteristics in the frequency band.

4A and 4B are sectional views for explaining the vibration of the sound output member in the display device according to the example of the present application.

4A and 4B, the first adhesive member 210 attaches the first piezoelectric element 310 to the display panel 100 and the second adhesive member 220 attaches the second piezoelectric element 320 Can be attached to the display panel (100). The first piezoelectric element 310 is deformed in at least one of the thickness direction and the longitudinal direction and can output sound through the vibration due to the deformation. The second piezoelectric element 320 is deformed in the thickness direction and can output sound through the vibration due to the deformation. That is, the first piezoelectric element 310 can vibrate while expanding and contracting in at least one of the thickness direction and the longitudinal direction to output sound, and the second piezoelectric element 320 can bend while vibrated in the thickness direction, Can be output. According to an example, when the first piezoelectric element 310 vibrates while expanding and contracting in at least one of a thickness direction and a length direction, the first piezoelectric element 310 can output sound of a high frequency band, When the piezoelectric element 320 vibrates while bending in the thickness direction, the second piezoelectric element 320 can output a low sound.

According to an example, the first piezoelectric element 310 may be disposed in a first area of the display panel 100, and the second piezoelectric element 320 may be disposed in a second area of the display panel 100. For example, the second area of the display panel 100 corresponds to a central area of the display panel 100, and the first area may correspond to a peripheral area excluding the second area. The first piezoelectric element 310 disposed in the first area of the display panel 100 can vibrate while expanding and contracting in at least one of the thickness direction and the longitudinal direction to output a high tone, The second piezoelectric element 320 disposed in the second area can bend in the thickness direction and vibrate to output low sound.

The first adhesive member 210 may have a first adhesive force such that the first piezoelectric element 310 vibrates in accordance with expansion and contraction in at least one of the thickness direction and the longitudinal direction. The first adhesive force of the first adhesive member 210 is determined by the shape, size, material, position, and acoustic characteristics of the first piezoelectric element 310, As shown in Fig. That is, the high frequency band of the first piezoelectric element 310 can be determined according to the first adhesive force of the first adhesive member 210. The first adhesive member 210 is deformable in at least one of the thickness direction and the longitudinal direction of the first piezoelectric element 310 and the first piezoelectric element 310 is attached to the front surface of the display panel 100 . For example, the first adhesive member 210 may have a soft adhesive force to allow the first piezoelectric element 310 to expand and contract in at least one of the thickness direction and the longitudinal direction. Here, the soft bonding strength of the first bonding member 210 is weaker than the hard bonding strength of the second bonding member 220. [

The second adhesive member 220 may have a second adhesive force such that the second piezoelectric element 320 vibrates while bending in the thickness direction. That is, the second adhesive force of the second adhesive member 220 can be determined so that the second piezoelectric element 320 vibrates back and forth based on the shape, size, material, position, and acoustic characteristics of the second piezoelectric element 320 . For example, the low-frequency band of the second piezoelectric element 320 can be determined according to the second adhesive force of the second adhesive member 220. The second adhesive member 220 is deformable in the thickness direction of the second piezoelectric element 320 and the second piezoelectric element 320 can be attached to the front surface of the display panel 100. [ For example, the second adhesive member 220 has a hard adhesive force to suppress expansion and contraction in at least one of the thickness direction and the longitudinal direction of the second piezoelectric element 320, Only one can be allowed. Here, the hard adhesive force of the second adhesive member 220 means that it is stronger than the soft adhesive force of the first adhesive member 210. [

Accordingly, the display device controls the adhesive force of the first and second adhesive members 210 and 220 to adjust the vibration caused by the expansion and contraction of each of the first and second piezoelectric elements 310 and 320, Can be controlled. For example, the display device may include a first piezoelectric element 310 that outputs sound of a high frequency band using the acoustic output member 300 of the same material through the adhesive force of the first and second adhesive members 210 and 220, And a second piezoelectric element 320 for outputting low-frequency sound. The display device can have excellent acoustic characteristics having a wide band by controlling the adhesive force of the first and second adhesive members 210 and 220.

5A is a plan view for explaining a structure of a wiring connected to an acoustic output member in a display device according to an example of the present application, and FIG. 5B is a sectional view taken along the line IV-IV 'in FIG. 5A.

5A and 5B, the display device may further include a wiring 400 connected to the acoustic output member 300 and serving as a passage for supplying current to the acoustic output member 300.

Specifically, the display panel 100 may include a display substrate 110 and a polarizing member 120. According to one example, the display substrate 110 may be implemented as a thin film transistor array substrate. The display substrate 110 may include a plurality of pixels, a data pad portion, and a gate pad portion. A plurality of pixels may be provided in a pixel region defined by a plurality of data lines and a plurality of gate lines. The data pad portion is connected to the plurality of data wirings on a one-to-one basis, and the gate pad portion can be connected to the plurality of gate wirings on a one-to-one basis. The polarizing member 120 is attached to the upper end of the display substrate 110 and can polarize the light incident from the display substrate 110. [ The polarizing member 120 may be formed by patterning a metal layer. For example, the metal layer of the polarizing member 120 may include, but is not limited to, aluminum, silver, platinum, and the like.

The wiring 400 may be disposed at the upper end of the display panel 100 (or at the upper end of the polarizing member 120) and connected to the acoustic output member 300. Specifically, the wiring 400 may have transparency and be patterned so as to be connected to the acoustic output member 300 on the front surface of the display panel 100. For example, the wiring 400 may be connected to each of the transparent electrodes attached to both surfaces of the piezoelectric film. Wiring 400 may serve as a passageway for providing current to acoustic output member 300. In addition, the adhesive member 200 may provide a space necessary for the acoustic output member 300 and the wiring 400 to be connected.

6 is a view for explaining a protective member disposed on the sound output member in the display device according to the example of the present application.

Referring to FIG. 6, the display device may further include a protection member 500 and an outer frame 600. The protective member 500 is disposed on the acoustic output member 300 to protect the display panel 100, the adhesive member 200, the acoustic output member 300, and the wiring 400 from external physical shocks have. Specifically, the protective member 500 may be attached to the upper end of the sound output member 300 and the upper end of the outer frame 600 to prevent damage and malfunction of the display device. In addition, the protective member 500 can protect the display device from pressure and high temperature, as well as external physical impact. According to one example, the protective member 500 may be embodied as a tempered glass.

According to one example, the protective member 500 may be attached to the upper end of the acoustic output member 300, and may oscillate together with the vibration of the acoustic output member 300. The protective member 500 can vibrate only the corresponding region according to the vibration of each of the plurality of sound output members 300. [ For example, the protective member 500 may be formed of a flexible material so that only the corresponding region where the vibrating acoustic output member 300 is disposed can vibrate. The protective member 500 can serve as a diaphragm while protecting the display device.

Since the outer frame 600 covers the entire side surface and the rear surface of the display device, the display device can be protected. The outer frame 600 may include a base frame and a plurality of sidewalls. The outer frame 600 surrounds the rear surface of the display device through the base frame and surrounds the side surface of the display device through the plurality of side walls. According to one example, the outer frame 600 may have a relatively strong stiffness relative to its weight. That is, the outer frame 600 can efficiently protect the display device without greatly increasing the weight of the display device. The outer frame 600 is designed according to the shape of the display device and may include a design on the surface of the outer frame 600. [

7 is a view for explaining a manufacturing method of a display device in which a display module is bonded onto a display substrate in a display device according to the example of the present application.

Referring to Fig. 7, a display device can be manufactured by bonding a display module onto a substrate. Here, the display module may include a polarizing member 120, an adhesive member 200, an acoustic output member 300, a wiring 400, and a protective member 500. The display module includes an adhesive member 200 and a wiring 400 on the polarizing member 120 and forms an acoustic output member 300 to be connected to the wiring 400 on the adhesive member 200, And a protective member 500 may be formed on the substrate 300. Further, the display device according to the present application can be provided to various kinds of display devices through the display module.

8A and 8B are plan views showing a display device according to another example of the present application.

Referring to FIG. 8A, the second piezoelectric element 320 may be disposed at a central region of the display panel 100, and the first piezoelectric element 310 may surround the second piezoelectric element 320 at a distance. The first piezoelectric elements 310a, 310b, 310c, and 310d are disposed in a central region of the front surface of the display panel 100, and each of the first piezoelectric elements 310a, 310b, 310c, And may be disposed in the corner region of the front surface. Here, the number of the first piezoelectric elements 310 arranged in the corner area of the display panel 100 is not limited. Each of the first four piezoelectric elements 310a, 310b, 310c, and 310d may or may not be provided with a frequency input to output sound corresponding to the image of the display panel 100. [

Each of the first and second piezoelectric elements 310 and 320 may be independently driven according to a frequency input. For example, when a sound source (for example, a machine including a person, an animal, a speaker, or an object generating sound) is located on the left side in the image of the display panel 100, The first piezoelectric elements 310b and 310d disposed on the right side are not provided with a frequency input. For example, the first piezoelectric elements 310a and 310c disposed on the left side output sounds of the first band, and the first piezoelectric elements 310b and 310d disposed on the right side output no sound. Therefore, the viewer who views the image can feel the reality that the sound source in the image of the display panel 100 makes sound directly.

The driving of the second piezoelectric element 320 can be determined depending on whether the second piezoelectric element 320 is output at a low sound level or not, regardless of the position of the sound source in the image of the display panel 100. [ Therefore, when the sound source located on the left side of the display panel 100 generates both the sound of the mid-range band and the sound of the low sound range, the first piezoelectric elements 310a and 310c and the second piezoelectric elements 320 are provided with frequency inputs. The first piezoelectric elements 310a and 310c disposed on the left side receive a frequency input and output a sound of a low frequency range and the second piezoelectric element 320 may receive a frequency input to output low frequency sounds .

On the contrary, when the sound source of the display panel 100 generates sound of only the mid-band, only the first piezoelectric elements 310a and 310c disposed on the left side receive the frequency input, and the second piezoelectric element 320 No frequency input is provided. Therefore, only the first piezoelectric elements 310a and 310c disposed on the left side can output sounds in the second band.

Referring to FIG. 8B, the second piezoelectric element 320 may be disposed at a central region of the display panel 100, and the first piezoelectric element 310 may surround the second piezoelectric element 320 at a distance. Specifically, the second piezoelectric element 320 is disposed in a central region of the display panel 100, and each of the eight first piezoelectric elements 310a to 310h may be disposed in a peripheral region of the display panel 100 . Here, the number of the first piezoelectric elements 310 arranged in the peripheral region of the display panel 100 is not limited. Each of the first eight piezoelectric elements 310a to 310h may or may not be provided with a frequency input to output sound corresponding to the image of the display panel 100. [

For example, when a sound source (e.g., a machine including a person, an animal, a speaker, or an object generating sound) is located in an edge area in the image of the display panel 100, The piezoelectric elements 310a, 310c, 310f, and 310h are provided with a frequency input, and the first piezoelectric elements 310b, 310d, 310e, and 310g that are not disposed in the corner areas are not provided with a frequency input. For example, the first piezoelectric elements 310a, 310c, 310f, and 310h disposed in the corner regions output sound of a high frequency range and the first piezoelectric elements 310b, 310d, 310e, 310g do not output sound. Therefore, the viewer who views the image can feel the reality that the sound source in the image of the display panel 100 makes sound directly.

Therefore, the more the position of the sound of the display device is, the more the position of the display device 100 with respect to the sound source of the image of the display panel 100 becomes, and the greater the sense of reality felt by viewers watching the image have. As a result, the number, size, position, etc. of the first piezoelectric elements 310 can be realized to maximize the acoustic characteristics while not requiring an excessive cost.

In the display device, the second piezoelectric element 320 for bass is disposed in a central region of the display panel 100 and the first piezoelectric element 310 for use in a drink is disposed in the peripheral region of the display panel 100, It can have excellent acoustic characteristics and can provide a multi-channel type acoustic output characteristic.

Fig. 9 is a view for explaining a partition disposed between sound output members in the display device according to the example of the present application. Fig.

9, the display device may further include a first piezoelectric element 310, which is an acoustic output member, and a partition 700, which separates the second piezoelectric element 320. Specifically, the partition 700 may be disposed so as to surround the second piezoelectric element 320 to prevent interference of sound generated from the first and second piezoelectric elements 310 and 320, respectively. According to one example, the partition 700 may correspond to an air gap or a space that absorbs sound generated when each of the first and second piezoelectric elements 310 and 320 vibrates . Further, the partition 700 may correspond to an enclosure or a baffle, and is not limited to a term.

 The partition 700 can separate the sound generated from each of the first and second piezoelectric elements 310 and 320. The partition 700 attenuates or absorbs the vibration of each of the first and second piezoelectric elements 310 and 320 so that the sound generated from each of the first and second piezoelectric elements 310 and 320 Can be blocked from being transmitted. Accordingly, the partition 700 can improve the acoustic output characteristics of the display device by separating the sound of each of the first and second piezoelectric elements 310 and 320. [

According to one example, the partition 700 may be formed of polyurethane or polyolefin, but is not limited thereto. In addition, the partition 700 may be implemented as a one-sided tape, a double-sided tape, or the like, and may be formed of a material having elasticity that can be compressed to a certain extent.

FIG. 10 is a diagram for explaining a driving circuit for driving the sound output member in the display device according to the example of the present application. FIG.

10, the acoustic output member 300 includes at least one piezoelectric element, and at least one piezoelectric element 300 includes a strained vibration layer 301, at least one first transparent electrode 303, and at least one And a second transparent electrode 305 of a second conductivity type. The deformation vibration layer 301 has transparency and can output sound through the vibration generated according to the deformation. Specifically, the deformation vibration layer 301 can vibrate according to expansion and contraction to output sound, or vibrate according to bending to output sound. According to one example, when the deformed vibration layer 301 vibrates according to the expansion and contraction, the acoustic output member 300 can output a middle tone, and when the deformed vibration layer 301 vibrates according to the bending, the acoustic output member 300 It is possible to output low sound.

The deformation vibration layer 301 may have a transparent and constant thickness and length. At least one first transparent electrode 303 is disposed between the front surface of the display panel 100 and one surface 301a of the deformed vibrating layer and at least one second transparent electrode 305 is disposed on one surface 301a of the deformed vibrating layer And can be disposed on the other surface 301b of the opposite deformation vibration layer. For example, the first and second transparent electrodes 303 and 305 are attached to both sides of the deformed vibration layer 301, and the first and second transparent electrodes 303 and 305 are electrically connected to the driving circuit unit 800, . When a voltage is applied to the first and second transparent electrodes 303 and 305, the deformation vibration layer 301 can vibrate according to an electric field by an inverse piezoelectric effect. For example, the display device can control the vibration (or the output of sound) of the sound output member 300 by controlling the voltage provided to the sound output member 300.

The deformation vibration layer 301 is deformed in at least one of a thickness direction and a longitudinal direction according to a voice signal applied to the first transparent electrode 303 and the second transparent electrode 305, Can be output. Specifically, the deformation vibration layer 301 can output sound by vibrating while expanding and contracting in at least one of the thickness direction and the longitudinal direction, or outputting sound by bending while vibrated in the thickness direction. According to an example, when the deformed vibration layer 301 vibrates while expanding and contracting in at least one of a thickness direction and a length direction, the sound output member 300 can output a middle tone, The sound output member 300 can output a low sound.

The display device may further include a driving circuit unit 800 for providing a frequency input to the sound output member 300. [ The driving circuit unit 800 may be connected to each of the first and second piezoelectric elements 310 and 320 to provide a frequency input to the piezoelectric elements 300 that need acoustic output. Specifically, the driving circuit unit 800 selects the first piezoelectric element 310 arranged in the first area and the second piezoelectric element 320 arranged in the second area based on the image to be displayed on the display panel 100, . The driving circuit unit 800 selects the sound output member 300 to output sound corresponding to the image of the display panel 100 and provides a frequency input so that sound corresponding to the image is output from the selected sound output member 300 can do.

The driving circuit unit 800 may include a control unit and a driving unit. The control unit can extract voice data and acoustic position data based on the video input data. Here, the voice data includes the frequency band information of the sound, and the acoustic position data may include the position information of the sound source in the image of the display panel 100. The driving unit may generate a voice signal based on the voice data and supply a voice signal to the piezoelectric element corresponding to the acoustic position data among the first piezoelectric element disposed in the first area and the second piezoelectric element disposed in the second area . Here, the voice signal may be provided to the first and second transparent electrodes 303 and 305 through the wiring 400. [

According to an example, the driving circuit unit 800 can receive position information (or acoustic position data) of a sound source (e.g., a machine including a person or a speaker) in an image of the display panel 100. [ The driving circuit unit 800 can select the acoustic output member 300 that needs to be driven based on the received position information. For example, as shown in FIG. 8A, the display device includes four first piezoelectric elements 310a, 310b, 310c, and 310d and one second piezoelectric element 320, When the sound source is located on the left side, the driving circuit unit 800 can receive the position information of the sound source and select the first piezoelectric elements 310a and 310c disposed on the left side. For example, the driving circuit unit 800 provides a frequency input to the first piezoelectric elements 310a and 310c disposed on the left side and a frequency input to the first piezoelectric elements 310b and 310d disposed on the right side I never do that. The first piezoelectric elements 310a and 310c disposed on the left side output sound of a high band and the first piezoelectric elements 310b and 310d disposed on the right side do not output sound. Therefore, the viewer who views the image can feel the reality that the sound source in the image of the display panel 100 makes sound directly.

In addition, the driving circuit unit 800 can receive the position information of the sound source and the frequency band information (or voice data) of the sound for each sound source. For example, as shown in FIG. 8A, the display device includes four first piezoelectric elements 310a, 310b, 310c, and 310d and one second piezoelectric element 320, The driving circuit unit 800 receives the position information and the frequency band information of the sound source and outputs the first piezoelectric elements 310a and 310c disposed on the left side, And the second piezoelectric element 320 can be selected. For example, the driving circuit portion 800 may provide a frequency input to the first piezoelectric elements 310a and 310c and the second piezoelectric element 320 disposed on the left side, and the first piezoelectric elements 310b , 310d do not provide a frequency input. The first piezoelectric elements 310a and 310c disposed on the left side output sound of a middle band, the second piezoelectric element 320 outputs sound of a low sound range, and the first piezoelectric elements 310b , 310d do not output sound. Therefore, the viewer who views the image can feel the reality that the sound source in the image of the display panel 100 makes sound directly.

As described above, the display device can generate sound such that the sound advancing direction becomes the front face of the display panel, thereby matching the image of the display device with the generation position of the sound, thereby improving the immersion feeling of the viewer watching the image of the display device. Further, since the display device does not need to constitute a speaker separately by constituting the piezoelectric element attached to the front face of the display panel, it is possible to improve the degree of freedom in arranging the speaker and improve the design aesthetics of the setting device.

The display device according to the embodiment of the present application can be described as follows.

The display device according to the present application includes a display panel for displaying an image and at least one sound output member attached to the front surface of the display panel via an adhesive member, and the sound output member can be transparent.

According to some embodiments of the present application, the sound output member may have a transparency and may include a strained vibrational layer that outputs sound through vibrations generated in response to the deformation.

According to some embodiments of the present application, the strained vibrational layer can oscillate along with expansion and contraction, or output sound through vibration along the bend.

According to some embodiments of the present application, the acoustic output member comprises at least one piezoelectric element, wherein the at least one piezoelectric element comprises a transparent deformation vibration layer, at least one first A transparent electrode, and at least one second transparent electrode disposed on the other side of the deformation vibration layer opposite to one surface of the deformation vibration layer.

According to some embodiments of the present application, the deformation vibration layer is deformed in at least one of a thickness direction and a longitudinal direction in accordance with a voice signal applied to the first transparent electrode and the second transparent electrode, can do.

According to some embodiments of the present application, it may further comprise a protective member disposed on the sound output member to protect the display panel and the sound output member.

According to some embodiments of the present application, the acoustical output member may be implemented through one of silicon, acrylic, urethane, or one of PVDF-TrFE (Polyvinylidene fluoride trifluoroethylene) and PZT (lead zirconate titanate).

According to some embodiments of the present application, the acoustic output member includes at least one first piezoelectric element disposed in a first region of a display panel, and at least a first piezoelectric element disposed in a second region different from the first region, And at least one first piezoelectric element and the at least one second piezoelectric element can output sounds of different frequency bands.

According to some embodiments of the present application, at least one first piezoelectric element outputs a middle tone, and at least one second piezoelectric element outputs a low tone.

According to some embodiments of the present application, the second region may comprise a central region of the display panel, and the first region may comprise a peripheral region of the display panel surrounding the second region.

According to some embodiments of the present application, the first piezoelectric element can output a middle tone through vibration due to the expansion and contraction of the deformation vibration layer, and the second piezoelectric element outputs bass through vibration due to bending of the deformation vibration layer .

According to some embodiments of the present application, the display panel may further include a partition for separating the first area and the second area of the display panel.

According to some embodiments of the present application, the adhesive member includes a first adhesive member interposed between the first piezoelectric element and the display panel, and a second adhesive member interposed between the second piezoelectric element and the display panel, And may include an adhesive member.

According to some embodiments of the present application, the adhesive force of the second adhesive member may be stronger than the adhesive force of the first adhesive member.

According to some embodiments of the present application, the first adhesive member can attach the first piezoelectric element to the display panel, and the second adhesive member can attach the second piezoelectric element to the display panel.

According to some embodiments of the present application, the first adhesive member may have a first adhesive force such that the first piezoelectric element vibrates due to expansion and contraction.

According to some embodiments of the present application, the second adhesive member may have a second adhesive force such that the second piezoelectric element vibrates along the bending.

According to some embodiments of the present application, the display device may further include a driving circuit for selectively controlling the piezoelectric elements disposed in the first area and the second area based on the image to be displayed on the display panel.

According to some embodiments of the present application, the driving circuit may generate a voice signal based on voice data and a control unit that extracts voice data and acoustic position data based on the video input data, And a driving unit for supplying a voice signal to the piezoelectric element corresponding to the acoustic position data among the piezoelectric elements.

A display device according to the present application displays an image and is arranged on a display panel including a first area and a second area, a first area and a second area to output sound, and includes at least one piezoelectric element One acoustic output member, and a partition between the first region and the second region.

According to some embodiments of the present application, the first area is a peripheral area of the display panel, the second area is a central area of the display panel, and at least one sound output member disposed in the first area can output a middle tone , And at least one sound output member disposed in the second region can output a low sound.

According to some embodiments of the present application, at least one piezoelectric element comprises a deformed vibrating layer, at least one first transparent electrode disposed between the front surface of the display panel and one surface of the deformed vibrating layer, and a deformed vibrating layer And at least one second transparent electrode disposed on the other surface.

According to some embodiments of the present application, at least one acoustic output member disposed in the first region is capable of outputting a second tone through vibration due to expansion and contraction of the deformed vibration layer, and at least one acoustic member The output member can output a low sound through the vibration caused by the bending of the deformation vibration layer.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of. Therefore, the scope of the present application is to be defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present application.

100: display panel 200: adhesive member
300: acoustic output member 400: wiring
500: protective member 600: outer frame
700: Partition 800: Drive circuit part

Claims (23)

A display panel for displaying an image; And
And at least one sound output member attached to the front surface of the display panel via an adhesive member,
Wherein the sound output member is transparent. The method according to claim 1,
Wherein the acoustic output member has transparency and includes a strained vibration layer that outputs sound through vibration generated in accordance with the deformation. 3. The method of claim 2,
Wherein the deformed vibration layer vibrates along with expansion and contraction or outputs sound through vibration caused by bending. The method according to claim 1,
Wherein the acoustic output member comprises at least one piezoelectric element,
Wherein the at least one piezoelectric element comprises:
A transparent deformation vibration layer;
At least one first transparent electrode disposed between a front surface of the display panel and one surface of the strained vibrating layer; And
And at least one second transparent electrode disposed on the other surface of the strained vibration layer opposite to one surface of the deformed vibration layer. 5. The method of claim 4,
Wherein the deformed vibrating layer deforms in at least one of a thickness direction and a length direction according to a voice signal applied to the first transparent electrode and the second transparent electrode, and outputs the sound through the vibration according to the deformation. The method according to claim 1,
And a protection member disposed on the sound output member to protect the display panel and the sound output member. The method according to claim 1,
Wherein the acoustic output member is implemented through one of silicon, acrylic, urethane, or one of PVDF-TrFE (polyvinylidene fluoride trifluoroethylene) and PZT (lead zirconate titanate). The method according to claim 1,
The sound output member
At least one first piezoelectric element disposed in a first region of the front surface of the display panel; And
And at least one second piezoelectric element disposed in a second region different from the first region in a front surface of the display panel,
Wherein the at least one first piezoelectric element and the at least one second piezoelectric element output sounds in different frequency bands. 9. The method of claim 8,
Wherein the at least one first piezoelectric element outputs a middle tone,
And the at least one second piezoelectric element outputs low sound. 9. The method of claim 8,
Wherein the second region includes a central region of the display panel, and the first region includes a peripheral region of the display panel surrounding the second region. 9. The method of claim 8,
Wherein the first piezoelectric element outputs a middle tone through vibration due to the expansion and contraction of the deformed vibration layer and the second piezoelectric element outputs a bass through vibration due to bending of the deformed vibration layer. 9. The method of claim 8,
Further comprising a partition for separating the first region and the second region of the display panel. 13. The method according to any one of claims 8 to 12,
The adhesive member
A first adhesive member interposed between the first piezoelectric element and the display panel; And
And a second adhesive member interposed between the second piezoelectric element and the display panel and having an adhesive strength different from that of the first adhesive member. 14. The method of claim 13,
And the adhesive force of the second adhesive member is stronger than the adhesive force of the first adhesive member. 14. The method of claim 13,
Wherein the first adhesive member attaches the first piezoelectric element to the display panel and the second adhesive member attaches the second piezoelectric element to the display panel. 14. The method of claim 13,
Wherein the first adhesive member has a first adhesive force so that the first piezoelectric element vibrates due to expansion and contraction. 14. The method of claim 13,
And the second adhesive member has a second adhesive force so that the second piezoelectric element vibrates along the bending. 9. The method of claim 8,
And a driving circuit for selectively controlling the piezoelectric elements disposed in the first area and the second area based on the image to be displayed on the display panel. 19. The method of claim 18,
The driving circuit unit includes:
A controller for extracting voice data and acoustic position data based on the video input data; And
And a driver for generating a voice signal based on the voice data and supplying the voice signal to a piezoelectric element corresponding to the acoustic position data among the piezoelectric elements disposed in the first area and the second area, . A display panel displaying an image, the display panel including a first area and a second area;
At least one acoustic output member disposed on the first region and the second region to output sound, the sound output member including at least one piezoelectric element; And
And a partition between the first region and the second region. 21. The method of claim 20,
Wherein the first region is a peripheral region of the display panel and the second region is a central region of the display panel and the at least one acoustic output member disposed in the first region outputs a middle tone, Wherein the at least one sound output member disposed in the at least one output unit outputs a low sound. 21. The method of claim 20,
The at least one piezoelectric element
Deformation vibration layer;
At least one first transparent electrode disposed between a front surface of the display panel and one surface of the strained vibrating layer; And
And at least one second transparent electrode disposed on the other surface of the strained vibration layer opposite to one surface of the deformed vibration layer. 23. The method of claim 22,
Wherein the at least one acoustic output member disposed in the first region outputs a high tone through vibration due to expansion and contraction of the deformed vibration layer, And outputs bass through vibration caused by bending of the bass.

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