KR102379600B1 - Display apparatus - Google Patents

Abstract

The display device according to the example of the present application includes a display module for displaying an image, a rear structure supporting the display module, a vibration generating device for vibrating the display module, and an acoustic reflection unit disposed on a side surface of the display module in a high-frequency region. It is possible to improve the sound quality of the sound output from the front of the display panel by preventing a decrease in the sound pressure level (SPL) of the display panel.

Description

display device {DISPLAY APPARATUS}

This application relates to a display device.

Recently, as we enter the information age, the field of display that visually expresses electrical information signals has developed rapidly, and in response to this, various display devices (Display Apparatus) with excellent performance of thinness, light weight, and low power consumption have been developed. is being developed Specific examples of such a display device include a liquid crystal display device, a field emission display device, an organic light emitting display device, and the like.

In general, a display device displays an image on a display panel, but a separate speaker must be installed to provide sound. When a speaker is installed in a display device, the direction of sound generated through the speaker is the side or top and bottom of the display panel, not the front or rear of the display panel on which the image is displayed, so the direction of the viewer viewing the image from the front of the display panel There is a problem that prevents the immersion of the viewer watching the video because the sound does not progress.

In addition, when a speaker included in a set device such as a TV is configured, the speaker occupies a certain space, so there is a problem in the design and space arrangement of the set device. In order to solve this problem, the previous display device can output sound to the front of the display panel through the vibration of the display panel, but in a high-frequency region, the ability to transmit vibration of the display panel is lowered, so that clarity of tone is reduced. have a problem

In addition, the vibration transmission capability of the display panel is lowered, so that the sound pressure level (SPL) is reduced, and power consumption is increased by increasing the applied voltage to reinforce the loss of the sound pressure level. In order to solve this problem, there is a need to develop a display device for improving the vibration transmission capability of the display panel in the high-frequency region.

Accordingly, the inventors of the present application recognized the above-mentioned problems, and when viewing an image from the front of the display panel, the direction of sound can be the front of the display panel, and various experiments in which the sound quality can be improved. . Through several experiments, a new structure of a display device that can generate sound so that the sound progresses toward the front of the display panel and improve the sound quality was implemented.

The present application aims to solve the problem of improving the sound quality of the sound output to the front of the display module by concentrating the sound emitted to the side of the display module in front of the display module by arranging the acoustic reflection unit on the side of the display module. .

An object of the present application is to change vibration energy having a transverse wave characteristic into a longitudinal wave characteristic by disposing an acoustic reflection unit on a side surface of a display module.

The present application provides a method for improving the flatness of the sound pressure level in the entire frequency region and improving sound clarity by preventing a decrease in the sound pressure level (SPL) in the high frequency region by arranging the acoustic reflection unit on the side surface of the display module. make it a task to be solved.

An object of the present application is to prevent leakage of sound pressure to the rear of a display device by including a vibration absorbing member interposed between a rear structure and a vibration generating device.

The present application is to improve the sound pressure level (SPL) in the front of the display device by including a vibration absorbing member interposed between the recessed portion of the rear structure and the vibration generating device to prevent leakage of sound pressure to the rear of the display device Make it the problem you want to solve.

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

A display device according to the present application includes a display module displaying an image, a rear structure supporting the display module, and a vibration generating device vibrating the display module, wherein the rear structure includes an acoustic reflection unit disposed on a side surface of the display module .

Other example specifics are included in the detailed description and drawings.

The display device according to the present application may generate sound so that the sound travel direction is toward the front of the display panel. Accordingly, the immersion feeling of the viewer viewing the image of the display device may be improved by matching the location of the sound generation with the image of the display device.

And, the display device according to the present application can improve the sound quality of the sound output to the front of the display module by focusing the sound emitted to the side of the display module toward the front of the display module by disposing the acoustic reflection unit on the side of the display module. there is.

In addition, the display device according to the present application may change vibration energy having a transverse wave characteristic into a longitudinal wave characteristic by disposing an acoustic reflection unit on a side surface of the display module.

And, the display device according to the present application improves the flatness of the sound pressure level in the entire frequency region by preventing a decrease in sound pressure level (SPL) in the high frequency region by disposing the sound reflection unit on the side surface of the display module, and Acoustic clarity can be improved.

In addition, the display device according to the present application may include a vibration absorbing member interposed between the rear structure and the vibration generating device, thereby preventing leakage of negative pressure to the rear of the display device.

In addition, the display device according to the present application includes a vibration absorbing member interposed between the recessed portion of the rear structure and the vibration generating device, thereby preventing negative pressure leakage to the rear of the display device and outputting the sound pressure level to the front of the display device (SPL) can be improved.

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

Since the content of the invention described in the problems to be solved above, the means for solving the problems, and the effects do not specify the essential characteristics of the claims, the scope of the claims is not limited by the matters described in the content of the invention.

1 is a perspective view of a display device according to a first embodiment of the present application.
2 is a diagram illustrating a sound output of the display device according to the first embodiment of the present application.
FIG. 3 is a cross-sectional view taken along the cutting line I-I' of FIG. 1 .
FIG. 4 is a view showing area A of FIG. 3 .
5 is a view for explaining an acoustic reflection unit in the display device according to the first embodiment of the present application.
6 is a view for explaining an acoustic reflection unit in the display device according to the first embodiment of the present application.
7 is a perspective view of a display device according to a second exemplary embodiment of the present application.
FIG. 8 is a cross-sectional view taken along line II-II' of FIG. 7 .
FIG. 9 is a diagram illustrating area B of FIG. 8 .
10 is a view showing a coupling unit in the display device according to the second embodiment of the present application.
11 is a diagram illustrating sound output characteristics of a display device according to an example of the present application.

Advantages and features of the present application and methods of achieving them will become apparent with reference to the examples described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the examples disclosed below, but will be implemented in a variety of different forms, and only these examples allow the disclosure of the present invention to be complete, and to those of ordinary skill in the art to which the present invention belongs It is provided to fully understand the scope of the invention, and the present invention is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining the example of the present application are exemplary, and thus the present invention is not limited to the illustrated matters. Like reference numerals refer to like elements throughout. In addition, in describing the present application, if it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present application, the detailed description thereof will be omitted. When 'including', 'having', 'consisting', etc. mentioned in the present application are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, cases including the plural are included unless otherwise explicitly stated.

In interpreting the components, it is construed as including an error range even if there is no separate explicit description.

In the case of a description of the positional relationship, for example, when the positional relationship of two parts is described as 'on', 'on', 'on', 'beside', etc., 'right' Alternatively, one or more other parts may be positioned between two parts unless 'directly' is used.

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

In describing the components of the present application, terms such as first and second may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms. When it is described that a component is “connected”, “coupled” or “connected” to another component, the component may be directly connected or connected to the other component, but other components may be interposed between each component. It should be understood that each component may be “interposed” or “connected”, “coupled” or “connected” through another component.

In the present application, "display device" may include a display device in a narrow sense, such as a liquid crystal module (LCM) including a display panel and a driving unit for driving the display panel, and an organic light emitting display module (OLED Module). . And, LCM, a finished product (complete product or final product) including OLED modules, such as notebook computers, televisions, computer monitors, automotive apparatus (automotive apparatus) or other types of vehicles (vehicle), including equipment (equipment) apparatus), a set electronic apparatus such as a mobile electronic apparatus such as a smart phone or an electronic pad, or a set device or set apparatus may also be included.

Accordingly, the display device in the present application may include a narrow display device itself such as an LCM, an OLED module, etc., and an application product including an LCM, an OLED module, or the like, or a set device that is an end-user device.

In some cases, an LCM and OLED module composed of a display panel and a driving unit may be expressed as a narrow “display device”, and an electronic device as a finished product including the LCM and OLED module may be expressed as a “set device”. . For example, a conventional display device includes a liquid crystal (LCD) or organic light emitting (OLED) display panel, and a source PCB that is a control unit for driving the display panel, and the set device is electrically connected to the source PCB and the set device It may be a concept that further includes a set PCB, which is a set control unit that controls the whole.

As the display panel used in this example, any type of display panel such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, and an electroluminescent display panel may be used. It is not limited to a specific display panel capable of generating sound by being vibrated by the sound generating device. In addition, the display panel used in the display device according to an example of the present invention is not limited to the shape or 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 gate lines and data lines. In addition, an array substrate including a thin film transistor as a switching element for controlling light transmittance in each pixel, an upper substrate including a color filter and/or a black matrix, and the like, and a liquid crystal layer formed between the array substrate and the upper substrate It may be composed of

In addition, 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. In addition, an array substrate including a thin film transistor as a device for selectively applying a voltage to each pixel, an organic light emitting device (OLED) layer on the array substrate, and an encapsulation substrate disposed on the array substrate to cover the organic light emitting device layer Alternatively, it may be configured to include an encapsulation substrate or the like. The encapsulation substrate may protect the thin film transistor and the organic light emitting device layer from external impact, and may prevent penetration of moisture or oxygen into the organic light emitting device layer. In addition, the layer formed on the array substrate may include an inorganic light emitting layer, for example, a nano-sized material layer or quantum dots.

In addition, the display panel may further include a backing such as a metal plate attached to the display panel. It is not limited to the metal plate, and other structures may be included.

Each feature of the various examples of the present application may be partially or wholly combined or combined with each other, technically various interlocking and driving are possible, and each example may be implemented independently of each other or may be implemented together in a related relationship. .

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

1 is a perspective view of a display device according to a first embodiment of the present application. FIG. 2 is a view showing the sound output of the display device according to the first embodiment of the present application, and FIG. 3 is a cross-sectional view taken along the cutting line II′ of FIG. 1 .

1 to 3 , the display device 10 includes a display module 100 , a vibration generating device 200 , a rear structure 300 , an acoustic reflection unit 400 , and an adhesive member 500 . .

The display module 100 may include a display panel 110 and a backlight unit 120 .

The display panel 110 is to display an image, and can be implemented as any type of display panel such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, and an electroluminescent display panel. there is.

The display panel 110 includes a front surface on which an image is displayed and a rear surface on which light is irradiated from the backlight unit 120 . According to an example, the display panel 110 is a liquid crystal display panel, and may display an image using light irradiated from the backlight unit 120 .

The display module 100 may further include an optical sheet unit 112 disposed on the rear surface of the display panel 110 . The optical sheet unit 112 may be spaced apart from the front surface of the backlight unit 120 while being attached to the rear surface of the display panel 110 . The optical sheet unit 112 may be disposed on the rear surface of the display panel 110 to improve luminance characteristics of light emitted from the backlight unit 120 . According to an example, the optical sheet unit 112 may be a composite optical sheet having both a function of diffusing incident light and a function of condensing the diffused light.

The backlight unit 120 may be disposed to be spaced apart from the rear surface of the display panel 110 based on the thickness direction of the display panel 110 to radiate light to the rear surface of the display panel 110 . In addition, the backlight unit 120 may be disposed to be spaced apart from the front surface of the rear structure 300 based on the thickness direction of the display panel 110 . For example, the front surface of the backlight unit 120 may face the rear surface of the display panel 110 , and the rear surface of the backlight unit 120 may face the front surface of the rear structure 300 . there is.

According to an example, the backlight unit 120 may receive the vibration of the vibration generating device 200 and transmit it to the display panel 110 . For example, the vibration generating device 200 may vibrate while in contact with a portion of the rear surface of the backlight unit 120 to vibrate the entire surface of the backlight unit 120 . The vibration of the backlight unit 120 may be transmitted to the display panel 110 through the gap space 130S between the display panel 110 and the backlight unit 120 and the module adhesive member 130 .

The backlight unit 120 may include a light guide plate 121 and a reflective sheet 123 .

The light guide plate 121 may be disposed on a front surface of the reflective sheet 123 to constitute a front surface of the backlight unit 120 . For example, the light guide plate 121 may be spaced apart from the rear surface of the display panel 110 while having a light incident surface. The light guide plate 121 may change the propagation direction of the light incident through the light incident surface toward the display panel 110 . According to an example, the light guide plate 121 may include a light-transmitting plastic or glass material. For example, the light guide plate 121 may be sapphire glass, but is not limited thereto, and may be implemented as a light guide glass.

The reflective sheet 123 may constitute a rear surface of the backlight unit 120 and may be connected to the vibration generating device 200 . For example, the reflective sheet 123 may support the light guide plate 121 disposed on the front surface of the reflection sheet 123 and reflect light incident from the light guide plate 121 . Accordingly, the reflective sheet 123 may prevent light incident from the light guide plate 121 from being emitted to the rear of the backlight unit 120 , and may make the light emitted toward the front of the backlight unit 120 uniform.

The display module 100 may further include a module adhesive member 130 . For example, the module adhesive member 130 may be interposed between the front edge of the backlight unit 120 and the rear edge of the display panel 110 . The module adhesive member 130 may be coupled to each of the backlight unit 120 and the display panel 110 to separate the display panel 110 from the backlight unit 120 . For example, the module adhesive member 130 may provide a gap space 130S between the rear surface of the display panel 110 and the front surface of the backlight unit 120 . The backlight unit 120 may receive vibration from the vibration generating device 200 , and the display panel 110 may receive vibration from the backlight unit 120 through the negative pressure of the gap space 130S. In addition, the gap space 130S formed between the display panel 110 and the backlight unit 120 prevents the light concentration of the backlight unit 120 , thereby improving the light luminance uniformity of the display apparatus 10 . there is.

According to an example, the module adhesive member 130 may have a sealing structure of a four-sided sealing type or a closed loop type. The module adhesive member 130 wraps the gap space 130S formed between the display panel 110 and the backlight unit 120 so that the negative pressure generated from the backlight unit 120 is transmitted to the display panel 110 . can do. The module adhesive member 130 may also serve to directly transmit the vibration of the backlight unit 120 toward the display panel 110 .

For example, the module adhesive member 130 may include an acrylic-based material or a urethane-based material. Here, the module adhesive member 130 has relatively excellent adhesion and high hardness so that the vibration of the backlight unit 120 can be transmitted to the display panel 110 among acrylic-based materials and urethane-based materials. It may include an acrylic-based material. In this case, the module adhesive member 130 may include a foam pad including an acrylic material, and an adhesive layer provided on each of the front and rear surfaces of the foam pad.

As another example, since the urethane-based material has relatively superior light leakage blocking properties compared to the acrylic-based material, in consideration of preventing light leakage, the module adhesive member 130 may include a urethane-based material.

The vibration generating device 200 may be disposed on the rear surface of the display module 100 to vibrate the display module 100 . For example, the vibration generating device 200 may be fixed to the rear structure 300 , and vibrate the display panel 110 through the backlight unit 120 to output a sound to the front of the display panel 110 . For example, the vibration generator 200 may generate a sound by using the display panel 110 vibrated together with the vibration of the backlight unit 120 as a vibration plate.

The vibration generating device 200 may directly vibrate the backlight unit 120 by penetrating the rear structure 300 and contacting the rear surface of the backlight unit 120 . According to an example, the upper portion of the vibration generating device 200 is inserted into the through hole 310 provided in the rear structure 300 and connected to the rear surface of the backlight unit 120 , and the lower portion of the vibration generating device 200 is the rear surface. It may be fixed in contact with the rear surface of the structure 300 . Accordingly, the vibration generating device 200 may vibrate the backlight unit 120 by vibrating according to a vibration signal corresponding to an image-related sound signal using the rear structure 300 as a support, and the display panel 110 may The vibration of the backlight unit 120 may be transmitted and a sound may be outputted forward. Accordingly, the display device 10 uses the display panel 110 vibrating through the backlight unit 120 as a diaphragm of the acoustic device to output sound to the front of the display panel 110 rather than the rear and the bottom, so that the display device By matching the image of (10) and the location of the sound, the immersion of the viewer watching the image of the display device 10 can be improved.

According to an example, the vibration generating apparatus 200 may include first and second sound generating modules 210 and 220 that vibrate different regions of the display panel 110 . For example, each of the first and second sound generating modules 210 and 220 may be fixed through the rear structure 300 and disposed to be spaced apart from each other. For example, the display panel 110 may include a left area and a right area, the first sound generating module 210 overlaps the left area of the display panel 110 , and the second sound generating module 220 . may be overlapped on the right area of the display panel 110 . Accordingly, the first sound generating module 210 is disposed on the left side of the back side of the backlight unit 120 to vibrate the left area of the display panel 110 , and the second sound generating module 220 is disposed on the left side of the back side of the backlight unit 120 . It is disposed on the right side to vibrate the right area of the display panel 110 . Each of the first and second sound generating modules 210 and 220 may be independently driven by receiving different vibration signals. For example, the first sound generating module 210 generates a sound by using the left area of the display panel 110 vibrated together with the vibration of the backlight unit 120 as a diaphragm, and the second sound generating module 220 . Silver may generate a sound by using the right area of the display panel 110 as a diaphragm.

According to an example, the vibration generating device 200 may be disposed in an area adjacent to the edge of the display module 100 . For example, the vibration of the low frequency region generated by the sound generating module 210 is transmitted through the backlight unit 120 , the gap space 130S between the display panel 110 and the backlight unit 120 , and the display panel 110 . As it is transmitted in a straight line, the sound LFS of the low frequency region may be output to the front FD of the display panel 110 . In addition, the vibration in the high frequency region generated by the vibration generating device 200 is sequentially transmitted to the edge of the backlight unit 120 , the module adhesive member 130 , and the display panel 110 , thereby generating a high frequency region sound (HFS). It may be output to the front FD of the display panel 110 . In addition, the vibration of the high frequency region generated by the vibration generating device 200 is emitted to the side surface of the backlight unit 120 and reflected by the acoustic reflection unit 400 , so that the sound HFS of the high frequency region is generated by the display panel 110 . It can be output to the front. Accordingly, the vibration in the low frequency region is first transmitted to the gap space 130S between the display panel 110 and the backlight unit 120 , but the vibration in the high frequency region is transmitted to the module adhesive member 130 through the edge of the backlight unit 120 . It may be transmitted first, or may be emitted to the side of the backlight unit 120 . As such, when the sound generating module 210 is spaced apart from the edge of the display module 100 , the vibration transmission path of the high frequency region may be extended to reduce the sound pressure level SPL of the high frequency region. Accordingly, the sound generating module 210 may be disposed in an area adjacent to the edge of the display module 100 to minimize the length of the vibration transmission path of the high frequency area, thereby preventing a decrease in the sound pressure level SPL of the high frequency area. Accordingly, when the vibration generating device 200 is disposed in an area adjacent to the edge of the display module 100 , the display device 10 exerts a lower negative pressure than when the vibration generating device 200 is spaced apart from the edge of the display module 100 . It is possible to output the sound HFS in the high frequency region having the high level SPL.

According to an example, the vibration generating device 200 may be arranged to ensure the design freedom of the display device 10 without reducing the rigidity of the rear structure 300 and to minimize the length of the vibration transmission path in the high frequency region. there is. For example, the vibration generating device 200 may be inserted into the through hole 310 of the rear structure 300 , and the position of the through hole 310 may be arranged so as not to reduce the rigidity of the rear structure 300 . there is. In addition, when the through hole 310 comes too close to the adhesive member 500 , the rigidity of the rear structure 300 may be reduced, so that the through hole 310 cannot completely overlap the edge of the display module 100 . . In addition, when the through hole 310 is disposed at the edge of the display module 100 so that the vibration generating device 200 is exposed to one side of the display device 10 , the degree of freedom for the design of the display device 10 may be reduced. there is. Accordingly, the through hole 310 may be disposed closest to the edge of the display module 100 within a range that does not reduce the rigidity of the rear structure 300 . In addition, the vibration generating device 200 is disposed so as not to be exposed to one side of the display device 10 , thereby improving the degree of design freedom of the display device 10 . Accordingly, the vibration generating device 200 secures the design freedom of the display device 10 without reducing the rigidity of the rear structure 300 and minimizes the length of the vibration transmission path in the high frequency region. It may be arranged according to the location.

According to an example, the vibration generating device 200 is a speaker, and may be a sound actuator, a sound exciter, or a piezoelectric element, but is not limited thereto and generates a sound according to an electrical signal. It may be an audio device that outputs.

The rear structure 300 may surround the rear surface of the backlight unit 120 . For example, the rear structure 300 covers the entire rear surface of the backlight unit 120 to be spaced apart, and may have a flat plate shape made of a glass material, a metal material, or a plastic material. Here, the edge or sharp corner portion of the rear structure 300 may have a slope shape or a curved shape by a chamfering process or a corner rounding process. According to an example, the rear structure 300 made of a glass material may include sapphire glass. For example, the metal rear structure 300 may be formed of any one of aluminum, an aluminum alloy, a magnesium alloy, and an alloy of iron and nickel. For another example, the rear structure 300 may have a laminate structure of a metal plate and a glass plate facing the rear surface of the backlight unit 120 while having a relatively thinner thickness than the glass plate, in this case, the display device ( The back side of 10) may be used as a mirror surface by a metal plate.

The rear structure 300 may include a through hole 310 into which the vibration generating device 200 is inserted. For example, the through hole 310 may be perforated to have a circular or polygonal shape in a set partial area of the rear structure 300 along the thickness direction of the rear structure 300 in order to insert the vibration generating device 200 . can According to an example, the through hole 310 may not completely overlap the edge of the display module 100 in order to maintain the rigidity of the rear structure 300 and the reliability of the display device 10 , but the rear structure 300 . The vibration generating device 200 may be disposed adjacent to the edge of the display module 100 within the limit of maintaining the rigidity of the display module 100 .

The acoustic reflector 400 may be disposed on the side surface of the display module 100 to reflect the sound emitted from the side surface of the display module 100 toward the front FD of the display module 100 . For example, the acoustic reflection unit 400 may protrude from the side surface of the rear structure 300 and be bent forward of the display module 100 . Here, the acoustic reflection unit 400 may be bent in a curved shape having a constant radius of curvature from the edge of the rear structure 300 , but is not limited thereto. And, the sound emitted from the side of the display module 100 may correspond to vibration energy having a transverse wave characteristic. The acoustic reflection unit 400 may prevent leakage of sound pressure in a lateral direction of the display module 100 by changing vibration energy having a transverse wave characteristic into a longitudinal wave characteristic. Accordingly, the sound reflection unit 400 reflects the sound propagating in the lateral direction of the display module 100 toward the front FD of the display module 100, thereby reducing the sound pressure level (SPL) in the high frequency region. By preventing loss, it is possible to improve the flatness of the sound pressure level in the entire frequency domain and improve the clarity of sound.

The inner surface of the acoustic reflection unit 400 may be non-parallel to the side surface of the display module 100 . Also, the inner surface of the acoustic reflection unit 400 may be non-parallel to the front surface of the display module 100 . For example, if the inner surface of the acoustic reflection unit 400 is parallel to the side surface of the display module 100 , the sound emitted from the side surface of the display module 100 is again reflected back toward the side surface of the display module 100 . can When the sound is reflected back toward the side of the display module 100 , the decrease in the sound pressure level SPL cannot be prevented. Accordingly, the sound reflection unit 400 has a side surface and an inclined inner surface of the display module 100 in order to reflect the sound emitted from the side surface of the display module 100 to the front FD of the display module 100 . can

According to an example, the inner surface of the acoustic reflection unit 400 may be inclined at 110 degrees to 160 degrees from the edge of the rear structure 300 . For example, if the inner surface of the acoustic reflection unit 400 is inclined at 90 degrees from the edge of the rear structure 300, the inner surface of the acoustic reflection unit 400 may be parallel to the side surface of the display module 100, When the inner surface of the acoustic reflection unit 400 is inclined 180 degrees from the edge of the rear structure 300 , the inner surface of the acoustic reflection unit 400 may be parallel to the front surface of the display module 100 . Here, when the inner surface of the acoustic reflection unit 400 is parallel to the side surface of the display module 100 , the sound emitted from the side surface of the display module 100 may be reflected back toward the side surface of the display module 100 . And, if the inner surface of the acoustic reflection unit 400 is parallel to the front surface of the display module 100 , the sound emitted from the side surface of the display module 100 cannot be reflected. And, when the angle between the inner surface of the sound reflection unit 400 and the edge of the rear structure 300 is close to 90 degrees or 180 degrees, the sound emitted from the side of the display module 100 is transmitted to the front of the display module 100 . (FD) cannot be reflected. Accordingly, in order to reflect the sound emitted from the side surface of the display module 100 to the front FD of the display module 100 , the inner surface of the sound reflection unit 400 is 110 degrees to the edge of the rear structure 300 . It may be formed to be inclined at 160 degrees.

According to an example, the acoustic reflection unit 400 may be made of the same material as the rear structure 300 . In addition, the acoustic reflection unit 400 may be integrally formed with the rear structure 300 , or the acoustic reflection unit 400 may be individually formed and then combined with the rear structure 300 . The acoustic reflection unit 400 may be made of a glass material, a metal material, or a plastic material, but is not limited thereto. For example, the rear structure 300 may be made of at least one of a glass material, a metal material, and a plastic material, but is not limited thereto, and the acoustic reflection unit 400 is made of the same material as the rear structure 300 . can be made with

According to another example, the acoustic reflection unit 400 may be formed of a material different from that of the rear structure 300 . In addition, the acoustic reflection unit 400 is formed through a separate heat treatment process or a chemical process in the process of being integrally formed with the rear structure 300 , or the acoustic reflection unit 400 is formed separately and then formed with the rear structure 300 and can be combined. The acoustic reflection unit 400 may be made of a glass material, a metal material, or a plastic material, but is not limited thereto. For example, the rear structure 300 may be made of at least one of a glass material, a metal material, and a plastic material, but is not limited thereto. can be made with

The adhesive member 500 may be disposed between the edge of the display module 100 and the edge of the rear structure 300 to adhere the display module 100 and the rear structure 300 . Specifically, the adhesive member 500 may be interposed between the backlight unit 120 and the rear structure 300 to have a constant thickness (or height), and may have a sealing structure of a four-sided sealing type or a closed loop type. . The adhesive member 500 is provided between the rear edge of the backlight unit 120 and the front edge of the rear structure 300 by coupling the rear structure 300 to the rear surface of the backlight unit 120 and the rear surface of the backlight unit 120 and A gap space 500S may be provided between the front surfaces of the rear structure 300 . Here, the gap space 500S may be used as a space into which the vibration generating device 200 is inserted and as a space for vibration of the rear structure 300 and the backlight unit 120 according to the driving of the vibration generating device 200 . . In addition, the gap space 500S formed between the backlight unit 120 and the rear structure 300 prevents the light concentration of the backlight unit 120 , thereby improving the light luminance uniformity of the display device 10 . .

According to an example, the adhesive member 500 may include a foam pad including an acrylic material, and an adhesive layer provided on each of the front and rear surfaces of the foam pad.

According to an example, the adhesive member 500 may be an optically clear adhesive resin (OCR), an optically clear adhesive film (OCA), or a double-sided tape.

FIG. 4 is a view showing area A of FIG. 3 .

Referring to FIG. 4 , the vibration generating device 200 may be disposed in an area adjacent to the edge of the display module 100 . For example, the vibration of the low frequency region generated by the sound generating module 210 is transmitted through the backlight unit 120 , the gap space 130S between the display panel 110 and the backlight unit 120 , and the display panel 110 . As it is transmitted in a straight line, the sound LFS of the low frequency region may be output to the front FD of the display panel 110 . In addition, the vibration in the high frequency region generated by the vibration generating device 200 is sequentially transmitted to the edge of the backlight unit 120 , the module adhesive member 130 , and the display panel 110 , thereby generating a high frequency region sound (HFS). It may be output to the front FD of the display panel 110 . In addition, the vibration of the high frequency region generated by the vibration generating device 200 is emitted to the side surface of the backlight unit 120 and reflected by the acoustic reflection unit 400 , so that the sound HFS of the high frequency region is generated by the display panel 110 . It can be output to the front. Accordingly, the vibration in the low frequency region is first transmitted to the gap space 130S between the display panel 110 and the backlight unit 120 , but the vibration in the high frequency region is transmitted to the module adhesive member 130 through the edge of the backlight unit 120 . It may be transmitted first, or may be emitted to the side of the backlight unit 120 . As such, when the sound generating module 210 is spaced apart from the edge of the display module 100 , the vibration transmission path of the high frequency region may be extended to reduce the sound pressure level SPL of the high frequency region. Accordingly, the sound generating module 210 may be disposed in an area adjacent to the edge of the display module 100 to minimize the length of the vibration transmission path of the high frequency area, thereby preventing a decrease in the sound pressure level SPL of the high frequency area. As a result, when the vibration generating device 200 is disposed in an area adjacent to the edge of the display module 100 , the display device 10 becomes more distant than when the vibration generating device 200 is spaced apart from the edge of the display module 100 . It is possible to output the sound HFS in a high frequency region having a high sound pressure level SPL.

In addition, if the acoustic reflection unit 400 is not disposed on the side surface of the backlight unit 120 acting as a diaphragm, the high-frequency region sound HFS is equal to the sound pressure level SPL emitted to the side surface of the backlight unit 120 . Sound pressure level (SPL) loss may occur. Accordingly, the acoustic reflection unit 400 reflects the sound emitted from the side surface of the backlight unit 120 toward the front FD of the display module 100 to reflect the high-frequency sound HFS having a high sound pressure level SPL. output, and the flatness of the sound pressure level can be improved in the entire frequency range.

According to an example, the angle formed between the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 may determine the direction in which the sound reflected in the front of the display module 100 travels. For example, according to an angle between the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 , the acoustic reflection unit 400 displays the sound emitted from the side of the display module 100 to the display module 100 . ) may be reflected in the front (FD), or may be reflected in the front of the left or in the front of the right. In this way, the sound reflection unit 400 may transmit sound to a specific point in the front FD of the display module 100 by adjusting the angle formed between the inner surface thereof and the edge of the rear structure 300 .

According to an example, the inner surface of the acoustic reflection unit 400 may be inclined at 110 degrees to 160 degrees from the edge of the rear structure 300 . For example, when the angle between the inner surface of the sound reflection unit 400 and the edge of the rear structure 300 is close to 90 degrees or 180 degrees, the sound emitted from the side of the display module 100 is displayed on the display module 100 . It cannot be reflected to the front (FD) of Accordingly, in order to reflect the sound emitted from the side surface of the display module 100 to the front FD of the display module 100 , the inner surface of the sound reflection unit 400 is 110 degrees to the edge of the rear structure 300 . It may be formed to be inclined at 160 degrees.

According to an example, the angle θ1 between the lower end of the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 may correspond to 110 degrees to 160 degrees. In addition, the angle θ2 between the first point of the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 and the second point of the inner surface of the acoustic reflection unit 400 are of the rear structure 300 . The angle θ3 formed with the edge may correspond to 110 degrees to 160 degrees. Here, the first point corresponds to a point at which the sound emitted from the side surface of the reflective sheet 123 reaches the inner surface of the acoustic reflection unit 400 , and the second point corresponds to the sound emitted from the side surface of the light guide plate 121 . It may correspond to a point reaching the inner surface of the acoustic reflection unit 400, but is not necessarily limited thereto. For example, the acoustic reflection unit 400 is formed to be curved toward the front FD of the display module 100 , so that each point on the inner surface of the acoustic reflection unit 400 forms an angle with the edge of the rear structure 300 . may be different. At this time, the angle θ2 between the first point of the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 and the second point of the inner surface of the acoustic reflection unit 400 are the rear structure 300 . When the angle θ3 formed with the edge of the is different from each other, the sound reflection unit 400 concentrates the sound reflected at each of the first and second points to at least one point among the front FD of the display module 100 . can do it

For another example, the angle formed by some points on the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 may be formed to be the same. At this time, the angle θ2 between the first point of the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 and the second point of the inner surface of the acoustic reflection unit 400 are the rear structure 300 . When the angle θ3 with the edge is formed to be the same, the sound reflection unit 400 may transmit the sound reflected at each of the first and second points to the front FD of the display module 100 in parallel. As such, the angle between the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 corresponds to 110 degrees to 160 degrees, so that the acoustic reflection unit 400 is emitted from the side of the display module 100 . By reflecting the sound toward the front FD of the display module 100 , it is possible to prevent a decrease in the sound pressure level SPL in the high frequency region.

5 is a view for explaining an acoustic reflection unit in the display device according to the first embodiment of the present application.

Referring to FIG. 5 , the acoustic reflection unit 400 may reflect the sound emitted from the side of the display module 100 and focus it on at least one point P in the front of the display module 100 . For example, the backlight unit 120 may receive vibration directly from the vibration generating device 200 to serve as a vibration plate, and may include a light guide plate 121 and a reflective sheet 123 made of different materials. there is. Here, since the light guide plate 121 and the reflective sheet 123 form a stacked structure, the side surfaces of the light guide plate 121 and the reflective sheet 123 are at the same height as different points on the inner surface of the acoustic reflection unit 400 . can have In other words, the sound emitted from the side surface of the reflective sheet 123 reaches a first point on the inner surface of the acoustic reflection unit 400 , and the sound emitted from the side surface of the light guide plate 121 is the acoustic reflection unit 400 . A second point on the inner surface can be reached. In addition, the angle θ2 between the first point of the inner surface of the acoustic reflection unit 400 and the edge of the rear structure 300 and the second point of the inner surface of the acoustic reflection unit 400 are of the rear structure 300 . Since the angle θ3 formed with the edge is formed differently, the acoustic reflection unit 400 may focus the reflected sound to at least one point P among the front FD of the display module 100 . In addition, the angle θ4 at which the sound emitted from the side surface of the reflective sheet 123 is reflected from the acoustic reflection unit 400 and the angle θ4 at which the sound emitted from the side surface of the light guide plate 121 is reflected from the acoustic reflection unit 400 ( Since θ5 is formed differently, the acoustic reflection unit 400 may focus the reflected sound to at least one point P among the front FD of the display module 100 . Accordingly, the sound reflection unit 400 concentrates the sound on at least one point P among the front FD of the display module 100, and the sound pressure level SPL of the high frequency region at the corresponding point P is high. can convey

6 is a view for explaining an acoustic reflection unit in the display device according to the first embodiment of the present application.

Referring to FIG. 6 , the acoustic reflection unit 400 may protrude from the side surface of the rear structure 300 and be bent forward of the display module 100 . According to an example, the acoustic reflection unit 400 may be further spaced apart from the side surface of the display module 100 from the bottom to the top. For example, the distance d2 between the upper portion of the acoustic reflection unit 400 and the side surface of the display module 100 is greater than the distance d1 between the lower portion of the acoustic reflection unit 400 and the side surface of the display module 100 . can be long Accordingly, the sound reflection unit 400 may be further spaced apart from the side surface of the display module 100 from the bottom to the top, and emit sounds emitted from the side surface of the display module 100 to reach different points in the display module 100 . ) can be reflected forward (FD). As a result, the sound reflection unit 400 may prevent a loss of a sound pressure level (SPL) in a high frequency region, thereby improving the flatness of the sound pressure level in the entire frequency region.

7 is a perspective view of a display device according to a second exemplary embodiment of the present application. FIG. 8 is a cross-sectional view taken along the cutting line II-II' of FIG. 7 , and FIG. 9 is a view showing area B of FIG. 8 . Here, the second embodiment of the present application differs from the first embodiment in the configuration of the rear structure 300 , the vibration absorbing member 600 , and the coupling part 700 , hereinafter, the rear structure 300 . , the vibration absorbing member 600, and the configuration of the coupling unit 700 will be mainly described, and the redundant description of the remaining components will be omitted or simply described.

7 to 9 , the vibration generating device 200 includes a module frame 201 , a side frame 202 , a vibration unit 203 , an outer frame 204 , and a damper 205 .

The module frame 201 may be disposed on the bottom surface 321 of the depression 320 to support the vibration generating device 200 . For example, the support frame 201 may be attached to the bottom surface 321 of the depression 320 to fix and support the vibration unit 203 . According to an example, the support frame 201 may be adhered to the bottom surface 321 of the depression 320 through the vibration absorbing member 600 . For example, the central portion of the module frame 201 may support the vibration unit 203 , and the outer portion of the module frame 201 may support the side frame 202 . In addition, the module frame 201 may increase the magnetic flux density flowing through the vibration unit 203 by controlling the magnetic flux formed through the magnet member 203a together with the upper plate 203b, and may improve vibration characteristics. .

The side frame 202 may be disposed on the module frame 201 to surround the lower portion of the vibration unit 203 to be spaced apart. Specifically, the side frame 202 may be implemented with a conductive material to control magnetic flux generated by the magnet member 203a. For example, the side frame 202 surrounds the magnet member 203a to be spaced apart, thereby concentrating the magnetic flux generated from the magnet member 203a into the vibration unit 203 to suppress leakage magnetic flux. Accordingly, the upper plate 203b is disposed on the upper end of the magnet member 203a, the module frame 201 is disposed on the lower end of the magnet member 203a, and the side frame 202 is disposed on the side of the magnet member 203a. By being spaced apart from each other, it is possible to suppress the leakage magnetic flux generated by the magnet member 203a to increase the magnetic flux density and improve the vibration characteristics.

The vibration unit 203 may be disposed on the module frame 201 to vibrate the backlight unit 120 . The vibration unit 203 may include a magnet member 203a, an upper plate 203b, a bobbin 203c, a coil 203d, and a bobbin ring 203e.

The magnet member 203a may be disposed on the module frame 201 . For example, the magnet member 203a may be interposed between the upper plate 203b and the module frame 201 , and may be surrounded by the side frame 202 to be spaced apart. According to an example, the upper plate 203b is disposed at one end of the magnet member 203a and the module frame 201 is disposed at the other end opposite to one end of the magnet member 203a, whereby the upper plate 203b and the module frame are disposed. Reference numeral 201 may control the magnetic flux generated by the magnet member 203a. Accordingly, the magnet member 203a is interposed between the upper plate 203b and the module frame 201, so that the magnetic flux generated from the magnet member 203a is concentrated into the vibration unit 203, so that leakage magnetic flux can be suppressed. .

The upper plate 203b may be disposed on the upper end of the magnet member 203a and may be spaced apart from the bobbin ring 203e. And, the magnet member 203a and the upper plate 203b are inserted into the bobbin 203c having a cylindrical shape, so that the outer peripheral surfaces of the magnet member 203a and the upper plate 203b are surrounded by the bobbin 203c. can Accordingly, the magnet member 203a and the upper plate 203b can guide the linear reciprocating motion of the bobbin 203c. Here, the upper plate 203b may be expressed as a center pole or pole pieces. According to an example, the upper plate 203b may be made of a magnetic material such as iron (Fe), thereby increasing the magnetic flux density formed through the magnet member 203a.

The bobbin 203c surrounds the upper plate 203b and may extend toward the rear structure 300 . For example, when a magnetic field is formed in the vibration unit 203 by applying a current for sound generation to the coil 203d wound around its outer circumferential surface, the bobbin 203c is a backlight through the bobbin ring 203e by the magnetic field. The unit 120 may be vibrated. Accordingly, the front surface of the bobbin 203c is in contact with the bobbin ring 203e, so that the bobbin 203c vibrates the backlight unit 120 through the bobbin ring 203e depending on whether current is applied or not. there is. In addition, the display panel 110 receives the vibration of the backlight unit 120 to generate sound waves, and the sound waves may be output to the front of the display panel 110 .

The coil 203d may be wound around the outer circumferential surface of the bobbin 203c to surround the magnet member 203a to be spaced apart. For example, the coil 203d may be wound around the outer circumferential surface of the bobbin 203c, and surround the magnet member 203a to be spaced apart to receive current for generating a sound. Here, the coil 203d may be expressed as a voice coil or the like. When a current for sound generation is applied to the coil 203d, the bobbin 203c follows Fleming's left hand rule based on an applied magnetic field formed around the coil 203d and an external magnetic field formed around the magnet member 203a. It may vibrate while being guided by the damper 205 . Accordingly, the bobbin 203c may vibrate while being guided by the damper 205 to transmit the vibration to the backlight unit 120 .

The bobbin ring 203e may be interposed between the bobbin 203c and the backlight unit 120 to transmit vibration of the bobbin 203c to the backlight unit 120 . According to an example, the bobbin ring 203e may be a ring-shaped plate-shaped member attached to the front surface of the bobbin 203c. In addition, the bobbin ring 203e may bond the bobbin 203c and the backlight unit 120 to each other. For example, the bobbin ring 203e may be implemented as a double-sided tape, but is not limited thereto. In addition, the bobbin ring 203e blocks the heat generated from the bobbin 203c from being transmitted to the display module 100 through the backlight unit 120 , and effectively transmits the vibration of the bobbin 203c to the backlight unit 120 . can be transmitted as

The outer frame 204 may be disposed on the side frame 202 . For example, the outer frame 204 may extend toward the backlight unit 120 from the upper periphery of the side frame 202 . In addition, the outer frame 204 may be disposed to be spaced apart from the bobbin 203c in parallel. An upper portion of the outer frame 204 may be connected to the damper 205 to support one end of the damper 205 . Accordingly, while the other end of the damper 205 is connected to the bobbin 203c to guide the vibration of the bobbin 203c, the outer frame 204 is fixed to the upper end of the side frame 202 to hold one end of the damper 205. can support

The damper 205 may be disposed between the outer frame 204 and the bobbin 203c to guide the vibration of the bobbin 203c. For example, one end of the damper 205 may be connected to the upper end of the outer frame 204 , and the other end of the damper 205 may be connected to the bobbin 203c. The damper 205 has a corrugated structure between one end and the other end, and may adjust and guide the vibration of the bobbin 203c while contracting and relaxing according to the linear reciprocating motion of the bobbin 203c. Accordingly, the damper 205 is connected between the outer frame 204 and the bobbin 203c to limit the vibration distance of the bobbin 203c through the restoring force.

The rear structure 300 may include a depression 320 for accommodating the vibration generating device 200 . Specifically, the front surface of the depression 320 may be depressed from the rear structure 300 to accommodate the vibration generating device 200 , and the rear surface of the depression 320 is from the rear structure 300 . can protrude. For example, the depression 320 may include a bottom surface 321 and an inner surface 323 . The bottom surface 321 of the depression may support the vibration generating device 200 , and the inner surface 323 of the depression may surround the vibration generating device 200 to be spaced apart.

According to an example, the rear structure 300 does not include a through hole into which the vibration generating device 200 is inserted, but instead includes a depression 320 , thereby simplifying the manufacturing process of the display device 10 . . For example, when the vibration generating device 200 is inserted into the through hole of the rear structure 300 and fixed to the rear structure 300 , the process of forming the through hole of the rear structure 300 , coupled to the periphery of the through hole The process of forming the device, the process of coupling the vibration generating device 200 to the rear structure 300 through the coupling device, and the process of sealing the rear surface of the vibration generating device 200 may be sequentially performed. Accordingly, the display device 10 according to the present application includes the recessed portion 320 of the rear structure 300, thereby attaching the vibration generating device 200 to the rear surface of the display module 100, and the display module ( Manufacturing and fixing can be completed through the process of attaching and sealing the rear surface of the rear surface of the structure 300 through the depression 320 of the rear structure 300 . Accordingly, the rear structure 300 includes the depression 320 accommodating the vibration generating device 200 , thereby simplifying the manufacturing process of the display device 10 and reducing manufacturing costs.

The display device 10 may further include a vibration absorbing member 600 interposed between the depression 320 of the rear structure 300 and the vibration generating device 200 . For example, the vibration absorbing member 600 may adhere the rear surface of the module frame 201 to the bottom surface 321 of the depression, and prevent the vibration of the vibration unit 203 from being transmitted to the rear structure 300 . can do.

According to an example, the vibration absorbing member 600 may include a material having low elasticity to absorb the vibration of the vibration generating device 200 transmitted to the rear of the display device 10 . For example, the vibration absorbing member 600 may include a material having lower elasticity than the recessed portion 320 of the module frame 201 and the rear structure 300 . In this case, the vibration absorbing member 600 may include a foam pad and an adhesive layer provided on each of the front and rear surfaces of the foam pad. Accordingly, the vibration absorbing member 600 is implemented to have lower elasticity than the recessed portion 320 of the module frame 201 and the rear structure 300 , thereby preventing negative pressure leakage to the rear of the display device 10 , and , the sound pressure level SPL output to the front of the display device 10 may be improved.

10 is a view showing a coupling unit in the display device according to the second embodiment of the present application.

Referring to FIG. 10 , the vibration absorbing member 600 may be interposed between the depression 320 of the rear structure 300 and the vibration generating device 200 . According to an example, the vibration absorbing member 600 may include first and second vibration absorbing members 610 and 620 .

The first vibration absorbing member 610 may be interposed between the bottom surface 321 of the depression and the rear surface of the module frame 201 . For example, the first vibration absorbing member 610 may adhere the rear surface of the module frame 201 to the bottom surface 321 of the depression, and the front and rear vibrations of the vibration unit 203 are transmitted to the rear structure 300 . can be prevented from becoming Accordingly, the first vibration absorbing member 610 may prevent leakage of sound pressure to the rear of the display apparatus 10 , and may improve the sound pressure level SPL output to the front of the display apparatus 10 .

The second vibration absorbing member 620 may be interposed between the inner surface 323 of the depression and the side surface of the module frame 201 . For example, the second vibration absorbing member 620 may be adhered to the inner surface 323 of the side recessed portion of the module frame 201 , and the left and right vibrations of the vibration unit 203 are transmitted to the rear structure 300 . it can be prevented Accordingly, the second vibration absorbing member 620 may prevent leakage of sound pressure to the rear of the display apparatus 10 and may improve the sound pressure level SPL output to the front of the display apparatus 10 .

Accordingly, the vibration absorbing member 600 prevents the forward and backward vibrations and left and right vibrations of the vibration unit 203 from being transmitted to the rear structure 300 through each of the first and second vibration absorption members 610 and 620, so that the display It is possible to prevent negative pressure leakage to the rear of the device 10 . In addition, the vibration absorbing member 600 may prevent leakage of sound pressure to the rear of the display apparatus 10 to improve the sound pressure level SPL output to the front of the display apparatus 10 .

The coupling part 700 may fix the vibration generating device 200 to the bottom surface 321 of the recessed part. For example, the coupling part 700 may sequentially penetrate the module frame 201 , the first vibration absorbing member 610 , and the bottom surface 321 of the recessed part. Therefore, the coupling part 700 improves the coupling force between the vibration generating device 200 and the recessed part 320 compared to the case where the vibration generating device 200 is attached to the recessed part 320 through only the vibration absorbing member 600 . Thus, the vibration generating device 200 can be fixed and supported. For example, the coupling part 700 may be implemented by a screw or a bolt and a nut.

11 is a diagram illustrating sound output characteristics of a display device according to an example of the present application. Specifically, a first structure (Structure 1) shown by a dotted line corresponds to a display device that does not include an acoustic reflection unit, and a second structure (Structure 2) shown by a solid line is the display device 10 according to an example of the present application. ) corresponds to In addition, it is assumed that the first and second structures have the same configuration except for the configuration of the acoustic reflection unit.

Referring to FIG. 11 , the display device of the first structure exhibits a marked decrease in the sound pressure level (SPL) in a high frequency region of 2 kHz or higher. It can be seen that this result is because a part of the vibration in the high frequency region is not output to the front of the display module and is radiated to the side of the display module. In addition, it can be seen that in the second structure, which is the display apparatus according to an example of the present application, the decrease in the sound pressure level (SPL) in the high frequency region of 2 kHz or higher is reduced compared to the display apparatus of the first structure. As a result of this, since the acoustic reflection unit 400 is disposed on the side surface of the display module 100 , the acoustic reflection unit 400 reflects the sound emitted from the side surface of the display module 100 toward the front of the display module 100 . It can be seen that this is because In addition, it can be seen that the sound reflection unit 400 can focus the sound at any point in front of the display module 100 .

Accordingly, it can be seen that in the display device of the second structure according to an example of the present application, the flatness of the sound pressure level (SPL) in the entire frequency domain is remarkably improved than that of the display device of the first structure. Therefore, the display device according to an example of the present application improves the transmission characteristics of the sound pressure generated by the vibration generating device through the sound reflection unit, thereby preventing the reduction of the sound pressure level (SPL) in the high frequency region and the sound pressure level ( SPL) can be improved to improve sound clarity.

In the display device according to the embodiment of the present application? As the display panel, all types of display panels such as a liquid crystal display panel, an organic light emitting diode (OLED) display panel, a quantum dot display panel, and an electroluminescent display panel may be used. and is not limited to a specific display panel capable of generating sound by being vibrated by the vibration generating device of the present application. In addition, the display device of the embodiment of the present application may be applied to a display panel including an organic light emitting layer, a quantum dot light emitting layer, and a micro light emitting diode.

And, the vibration generating device according to the embodiment of the present application can be applied to a display device. A display device according to an embodiment of the present application includes a mobile device, a video phone, a smart watch, a watch phone, a wearable device, a foldable device, and a rollable device. device), bendable device, flexible device, curved device, electronic notebook, e-book, portable multimedia player (PMP), personal digital assistant (PDA), MP3 player, mobile Medical equipment, desktop PC, laptop PC, netbook computer, portable computer, workstation, navigation, vehicle navigation, vehicle display, television, wallpaper ( wallpaper), laptops, monitors, cameras, camcorders, and home appliances.

A display device according to an embodiment of the present application may be described as follows.

The display device according to the present application includes a display module displaying an image, a rear structure supporting the display module, a vibration generating device vibrating the display module, and an acoustic reflection unit disposed on a side surface of the display module.

According to some embodiments of the present application, the acoustic reflection unit may reflect the sound emitted from the side of the display module toward the front of the display module.

According to some embodiments of the present application, the acoustic reflection unit may protrude from the side surface of the rear structure.

According to some embodiments of the present application, the acoustic reflection unit may be bent toward the front of the display module.

According to some embodiments of the present application, the inner surface of the acoustic reflection unit may be non-parallel to the side surface of the display module.

According to some embodiments of the present application, the inner surface of the acoustic reflection unit may be formed to be inclined at 110 degrees to 160 degrees from the edge of the rear structure.

According to some embodiments of the present application, an angle formed between the inner surface of the acoustic reflection unit and the edge of the rear structure may determine the sound propagation direction.

According to some embodiments of the present application, the acoustic reflection unit may reflect the sound and focus it on at least one point in front of the display module.

According to some embodiments of the present application, the acoustic reflection unit may be further spaced apart from the side surface of the display module from the lower part to the upper part.

According to some embodiments of the present application, the acoustic reflection unit may be formed of a glass material, a metal material, or a plastic material.

According to some embodiments of the present application, the rear structure may include a depression for accommodating the vibration generating device.

According to some embodiments of the present application, the display device may further include a vibration absorbing member interposed between the recessed portion of the rear structure and the vibration generating device.

According to some embodiments of the present application, the vibration absorbing member may adhere the rear surface of the vibration generating device to the bottom surface of the depression.

According to some embodiments of the present application, the bottom surface of the depression may support the vibration generating device, and the inner surface of the depression may surround the vibration generating device to be spaced apart.

According to some embodiments of the present application, the vibration generating device includes a module frame fixed to the bottom surface of the rear structure, and a vibration unit disposed on the module frame to transmit vibration to the display module, and the vibration absorbing member includes the recessed part. A first vibration absorbing member interposed between the bottom surface and the rear surface of the module frame, and a second vibration absorbing member interposed between the inner surface of the depression and the side surface of the module frame may be included.

According to some embodiments of the present application, the display device may further include a coupling part for fixing the vibration generating device to the bottom surface of the recessed part.

According to some embodiments of the present application, the coupling portion may pass through the module frame, the vibration absorbing member, and the depression.

According to some embodiments of the present application, the display module may include a display panel and a backlight unit disposed on a rear surface of the display panel.

According to some embodiments of the present application, the display module may further include a module adhesive member interposed between the edge of the display panel and the edge of the backlight unit.

The present application described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which this application belongs that various substitutions, modifications and changes are possible within the scope not departing from the technical matters of the present application. It will be clear to those who have the knowledge of Therefore, the scope of the present application is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present application.

10: display device
100: display module 110: display panel
120: backlight unit 130: module adhesive member
200: vibration generating device 300: rear structure
400: acoustic reflection unit 500: adhesive member
600: vibration absorbing member 700: coupling portion

Claims (19)

a display module for displaying an image;
a rear structure supporting the display module;
a vibration generating device for vibrating the display module; and
Including an acoustic reflection unit disposed on the side of the display module,
The acoustic reflection unit has an inner surface concave toward the front of the display module,
The sound reflection unit reflects the sound emitted from the side of the display module toward the front of the display module,
The sound reflecting unit concentrates the reflected sound to at least one point in front of the display module. delete The method of claim 1,
The acoustic reflection unit protrudes from the side surface of the rear structure, the display device. delete 4. The method of claim 3,
An inner surface of the acoustic reflection unit is non-parallel to a side surface of the display module. 6. The method of claim 5,
The inner surface of the acoustic reflection unit is formed to be inclined at 110 degrees to 160 degrees from the edge of the rear structure, the display device. 6. The method of claim 5,
An angle between the inner surface of the sound reflection unit and the edge of the rear structure determines the direction in which the sound travels. delete 4. The method of claim 3,
The acoustic reflection unit is further spaced apart from the side surface of the display module from the bottom to the top, the display device. 4. The method of claim 3,
The sound reflection unit is made of a glass material, a metal material, or a plastic material, a display device. The method of claim 1,
The rear structure includes a depression for accommodating the vibration generating device, the display device. 12. The method of claim 11,
The display device further comprising a vibration absorbing member interposed between the recessed portion of the rear structure and the vibration generating device. 13. The method of claim 12,
The vibration absorbing member adheres a rear surface of the vibration generating device to a bottom surface of the recessed part. 13. The method of claim 12,
A bottom surface of the recessed part supports the vibration generating device, and an inner surface of the recessed part surrounds the vibration generating device to be spaced apart from each other. 13. The method of claim 12,
The vibration generating device,
a module frame fixed to the bottom surface of the rear structure; and
and a vibration unit disposed on the module frame to transmit vibration to the display module,
The vibration absorbing member,
a first vibration absorbing member interposed between a bottom surface of the recessed part and a rear surface of the module frame; and
and a second vibration absorbing member interposed between an inner surface of the recessed portion and a side surface of the module frame. 16. The method of claim 15,
The display device, further comprising a coupling portion for fixing the vibration generating device to the bottom surface of the depression. 17. The method of claim 16,
The coupling part penetrates through the module frame, the vibration absorbing member, and the recessed part. 18. The method of any one of claims 1, 3, 5-7, and 9-17, wherein
The display module is
display panel; and
and a backlight unit disposed on a rear surface of the display panel. 19. The method of claim 18,
The display module is
The display apparatus further comprising a module adhesive member interposed between an edge of the display panel and an edge of the backlight unit.

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