KR102312265B1 - Display apparatus - Google Patents

Abstract

The display device according to the present application includes a display panel, a sound generating module disposed on the rear side of the display panel, a rear module disposed on the rear side of the sound generating module, and a driving module for selectively attaching the rear module to the sound generating module, It is possible to integrate the functions of the speaker and noise canceling.

Description

display device {DISPLAY APPARATUS}

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

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 with excellent performance such as 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 (LCD), a field emission display device (FED), an organic light emitting display device (OLED), and the like. have.

Among them, the liquid crystal display device includes an array substrate including thin film transistors, 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 arrangement state of the liquid crystal layer is adjusted according to the electric field applied between two electrodes in the pixel area, and the transmittance of light is adjusted according to the arrangement state to display an image.

In addition, the organic light emitting display device is a self-luminous device, and has been receiving widespread attention because it has advantages of fast response speed, luminous efficiency, luminance, and viewing angle compared to other display devices.

In general, a display device displays an image on a display panel, but a separate speaker needs to be installed in order 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 back 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, since the sound generated through the speaker proceeds to the side of the display panel or the upper and lower surfaces of the display panel, there is a problem in that the sound quality is deteriorated due to interference with the sound reflected from the wall or the floor.

In addition, when a speaker included in a set device such as a TV is configured, the speaker occupies a certain space, thereby limiting the design and space arrangement of the set device.

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.

An object of the present application is to provide a display device capable of outputting sound in a front direction of a display panel.

An object of the present application is to provide a display device for outputting sound in a mid-bass frequency band through a sound generating module and a rear module selectively attached thereto.

An object of the present application is to provide a display device for selectively outputting sound in a high-pitched or mid-low frequency band through a driving module.

The present application provides a display device for reducing indoor noise through a noise canceling function.

An object of the present application is to provide a display device capable of improving design aesthetics by omitting a space in which a speaker is separately disposed in addition to an area of a display panel.

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 panel, a sound generating module disposed on the rear surface of the display panel, a rear module disposed on the rear surface of the sound generating module, and a driving module for selectively attaching the rear module to the sound generating module.

The display device according to the present application includes a display panel, a sound generating module disposed on the rear side of the display panel, a rear module disposed on the rear side of the sound generating module, and a driving module for adjusting the distance between the sound generating module and the rear module, , the display panel outputs the sound of the first frequency band or the sound of the second frequency band as the distance between the sound generating module and the rear module is adjusted.

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

Since the display device according to the present application can generate sound so that the sound travel direction is toward the front of the display panel, the image of the display device and the location of the sound are matched, thereby improving the immersion of the viewer watching the image of the display device. can do it

And, since the display device according to the present application configures the sound generating module attached to the rear surface of the display panel, it is not necessary to configure the speaker separately, so it is possible to improve the degree of freedom for the arrangement of the speaker and improve the aesthetics of the design of the set device. have.

And, the display device according to the present application can integrate the functions of the speaker and the noise canceling by configuring the sound generating module and the rear module selectively attached.

In addition, the display device according to the present application can provide a vehicle display device including a speaker and capable of reducing noise inside the vehicle by configuring the sound generating module and the rear module selectively attached thereto.

In addition to the effects of the present application mentioned above, other features and advantages of the present application will be described below, or will be clearly understood by those of ordinary skill in the art to which this application belongs from the description and description.

1A is a cross-sectional view illustrating a speaker mode of a display device according to a first embodiment of the present application.
1B is a cross-sectional view illustrating a noise canceling mode of the display device according to the first embodiment of the present application.
2A is a graph illustrating a frequency in a speaker mode in the display device according to the first embodiment of the present application.
FIG. 2B is a graph illustrating a frequency in a noise canceling mode in the display device according to the first embodiment of the present application.
3A is a cross-sectional view illustrating a speaker mode of a display device according to a second exemplary embodiment of the present application.
3B is a cross-sectional view illustrating a noise canceling mode of the display device according to the second exemplary embodiment of the present application.

Advantages and features of the present application, and a method of achieving them will become apparent with reference to examples described below in detail in conjunction with the accompanying drawings. However, the present application is not limited to the examples disclosed below, but will be implemented in various different forms, and only examples of the present application allow the disclosure of the present application to be complete, and common knowledge in the technical field to which the present application belongs It is provided to fully inform those who have the scope of the invention, and the present application is only defined by the scope of the claims.

The shape, size, ratio, angle, number, etc. disclosed in the drawings for explaining an example of the present application are exemplary, and thus the present application 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 this specification are used, other parts may be added unless 'only' is used. When a component is expressed in the singular, the case in which the plural is included is included unless otherwise explicitly stated.

In interpreting the components, it is interpreted 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 the two parts unless 'directly' is used.

In the case of a description of a temporal relationship, for example, 'immediately' or 'directly' when a temporal relationship is described with 'after', 'following', 'after', 'before', etc. It may include cases that are not continuous unless this is used.

Although the first, second, etc. are used to describe various components, these components 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 application.

"First horizontal axis direction", "second horizontal axis direction", and "vertical axis direction" should not be construed only as a geometric relationship in which the relationship between each other is vertical, and the range in which the configuration of the present application can function functionally It may mean to have a broader direction than within.

The term “at least one” should be understood to include all possible combinations from one or more related items. For example, the meaning of "at least one of the first, second, and third items" means 2 of the first, second, and third items as well as each of the first, second, or third items. It may mean a combination of all items that can be presented from more than one.

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 independently implemented with respect to each other or may be implemented together in a related relationship. .

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 module for driving the display panel, and an organic light emitting display module (OLED Module). have. And, the LCM, a finished product (complete product or final product) including an OLED module, a notebook computer, a television, a computer monitor, an automotive device (automotive display) or other types of vehicles (vehicle) including equipment (equipment) Display), a set electronic device such as a mobile electronic device 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, LCM and OLED modules composed of a display panel and driving module may be expressed as "display devices" in a narrow sense, and electronic devices as finished products including LCM and OLED modules may be divided and expressed as "set devices". have. 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 the 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 which is 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.

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.

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 occupants of two front seats so that vibrations of the display panel are propagated toward the interior of the vehicle. Thus, the audio experience in the vehicle can be improved compared to having speakers only on the interior sides of the vehicle.

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 independently implemented with respect to each other or may be implemented together in a related relationship. .

Hereinafter, a preferred example of the display device according to the present application will be described in detail with reference to the accompanying drawings. In adding reference numerals to components of each drawing, the same components may have the same reference numerals as much as possible even though they are indicated in different drawings.

When a display panel is applied to an automotive display, the display panel functions to transmit information. And, the function of the speaker is to generate sound by utilizing the car audio. When car audio is used, a technology for improving sound quality by removing the noise of a vehicle is being studied. As one method of removing noise, a reverse wavelength may be emitted after sensing by applying an indoor audio system through a vehicle wind noise or road friction noise. In this case, since the audio located on the side with respect to the seat of the vehicle is used, it is difficult to cancel the noise or the wavelength corresponding to the noise. Wind noise is generated when, for example, a vehicle window is closed and the vehicle is driven at high speed, and changes according to the vehicle speed or wind direction. For example, the frequency of the wind noise may be 500 Hz or less, but is not limited thereto.

The inventors of the present application recognized the above problems, and conducted various experiments to reduce noise generated when a sound generating device is implemented in a display device. Through various experiments, a display device having a new structure capable of generating sound and reducing noise was invented. This will be described below.

FIG. 1A is a cross-sectional view illustrating a speaker mode of a display device according to a first embodiment of the present application, and FIG. 1B is a cross-sectional view illustrating a noise canceling mode of the display device according to the first embodiment of the present application.

1A and 1B , the display device includes a display panel 100 , a sound generating module 200 , a rear module 300 , a driving module 400 , and a protection member 500 .

The display panel 100 is to display an image, and may 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. and may be vibrated by the sound generating module 200 disposed on the rear surface of the display panel 100 .

For example, the display panel 100 may be a top emission method, a bottom emission method, or a dual structure depending on the structure of a pixel array layer including a substrate, an anode electrode, a cathode electrode, and an organic compound layer. An image can be displayed in the form of an emission (Dual Emission) or the like. The top emission method may display visible light generated from the pixel array layer toward the polarizing plate, and the bottom emission method may display visible light generated from the pixel array layer toward the substrate.

The sound generating module 200 is disposed on the rear side of the display panel 100 . For example, the sound generating module 200 may be disposed on a part of the rear surface of the display panel 100 . The sound generating module 200 may vibrate according to a frequency input, and since the display panel 100 vibrates as the sound generating module 200 vibrates, a sound wave is generated by the vibration of the display panel 100 and the display panel Sound can be output in the front direction of (100).

The sound generating module 200 includes at least one piezoelectric element, and the at least one piezoelectric element 300 includes a strained vibration layer. The deformable vibration layer may vibrate according to the deformation. For example, the deformable vibration layer may vibrate according to expansion and contraction or vibrate according to bending.

The piezoelectric element, when an external force is applied, electrical polarization occurs to generate a potential difference, and on the contrary, when a voltage is applied, it refers to an element having a property of generating deformation or strain, that is, a piezoelectric effect. According to an example, the piezoelectric element may be implemented with quartz, tourmaline, Rochelle's salt, barium titanate (BaTiO3), ammonium dihydrogenphosphate (NH4H2PO4), piezoelectric ceramics, or the like. And, as another example, it may be made of a material having piezoelectric properties among ceramic materials having a perovskite structure. Perovskite has excellent performance as a speaker. For example, the perrotite may be calcium titanate (CaTiO3) or barium titanate (BaTiO3), but is not limited thereto.

In addition, the sound generating module 200 is an insulating elastic material such as silicone, acrylic, or urethane, or a piezoelectric polymer such as PVDF (Poly Vinylidene Fluoride) or PZT (lead zirconate titanate; a generic term for a solid solution of zirconate PbZrO3 and titanate PbTiO3). It can be implemented through a material, and PVDF includes PVDF-TrFE (polyvinylidene fluoride trifluoroethylene) and has material properties that are easy to manufacture in the form of a flexible film.

The deformable vibration layer may have a constant thickness and length. Electrodes are attached to both sides of the deformable vibration layer, and the electrodes may receive voltage from an external circuit. When a voltage is applied to the electrodes, the sound generating module 200 may vibrate according to an electric field due to a reverse piezoelectric effect.

The sound generating module 200 may be attached to the rear surface of the display panel 100 through an adhesive member.

The adhesive member may be disposed on a portion of the rear surface of the display panel 100 to adhere the rear surface of the display panel 100 to the front surface of the sound generating module 200 . The adhesive member may be disposed to correspond to the number, size, and position of the sound generating module 200 . When a plurality of adhesive members are implemented, the plurality of adhesive members may be spaced apart from each other and may have different adhesive strengths. The adhesive force of the adhesive member may be adjusted according to the shape, size, material, location, and acoustic characteristics of the sound generating module 200 . The adhesive member according to an example may be an adhesive film or an optically cleared adhesive (OCA), an optically cleared resin (OCR), or a pressure sensitive adhesive.

The display device according to the present application includes a sound generating module 200 that generates a sound by vibrating the display panel 100 so as to output sound in the front direction of the display panel 100, and the position and sound of the image. It is possible to increase the realism of the image by matching the occurrence location of the , and improve the immersion of the viewer watching the image. In addition, since the display device does not need to configure a separate speaker by configuring the sound generating module 200 , it is possible to improve the degree of freedom for the arrangement of the speaker and improve the aesthetics of the design of the set device.

The rear module 300 is disposed on the rear side of the sound generating module 200 . The rear module 300 may be moved by the driving module 400 to be attached to or detached from the sound generating module 200 . When the rear module 300 is attached to the sound generating module 200 , when the sound generating module 200 vibrates, the rear module 300 may also vibrate. Accordingly, the sound generating module 200 , the rear module 300 , and the display panel 100 may vibrate together.

The rear module 300 may include an elastic polymer made of an elastic material. For example, the rear module 300 may be implemented using one of insulating elastic materials such as silicone, acrylic, and urethane. Accordingly, the rear module 300 may be made of an elastic material that is easy to vibrate like the sound generating module 200 .

When the display panel 100 vibrates like the sound generating module 200 and the rear module 300 , a low frequency band may be output. Since the rear module 300 is formed in a size corresponding to the entire rear surface of the display panel 100 unlike the sound generating module 200, when the rear module 300 vibrates together, the entire display panel 100 can be vibrated at once. have. Accordingly, the display panel 100 is capable of outputting a frequency of a low band, for example, a compensation frequency for internal noise of a vehicle. The frequency of the low band may be, for example, 100 Hz to 500 Hz. The compensation frequency may be, for example, 100 Hz to 500 Hz.

The driving module 400 is disposed on the rear and side surfaces of the rear module 300 . The driving module 400 may selectively attach the rear module 300 to the sound generating module 200 . The driving module 400 may adjust the distance between the sound generating module 200 and the rear module 300 . For example, the driving module 400 may attach the rear module 300 to the sound generating module 200 or detach the rear module 300 from the sound generating module 200 .

The driving module 400 may be a motor capable of driving, such as a pneumatic cylinder motor and a server motor, but is not limited thereto. For example, the rear module 300 may be selectively attached to the sound generating module 200 using a linear motor method or a ball screw motor method. When the linear motor method is applied, it has the advantages of fast speed and response, and excellent robustness. In addition, when a stepping motor method is applied in another method, precise control may be possible and a large torque may be obtained.

The driving module 400 may operate in response to a button operation, and may operate in response to an auto signal. For example, there is a method in which a user operates the driving module 400 by pressing a button formed inside the vehicle, and the driving module is driven by an auto signal unit that measures speed information inside the vehicle and generates a signal when the speed is above or below a certain speed. There is a method of operating 400, but is not limited thereto.

And, referring to FIGS. 1A and 1B , the structure when the driving module 400 is a linear motor type is illustrated, and the linear motor type will be described as an example.

The driving module 400 includes a control unit, a module support member 410 , a movement block 420 , and a movement guider 430 .

The control unit generates a module movement signal according to an input signal. The controller may be connected to an external device that transmits a signal. For example, the control unit may receive a signal by a button operation inside the vehicle or a signal by speed information, and may generate a module movement signal in response to the signal.

The module support member 410 is disposed on the rear surface of the rear module 300 . The module support member 410 is formed to support the rear module 300 . The module support member 410 may be moved by the moving block 420 , and the rear module 300 may be moved as the module support member 410 moves.

The moving block 420 is disposed on the rear surface of the module support member 410 . The moving block 420 may move the module supporting member 420 in response to the module moving signal. The movement block 420 includes a coil that receives a module movement signal.

The coil is formed to wind the outside of the moving block 420 . As the coil receives the module movement signal, current may flow. Since the driving module 400 includes a magnet, when a current flows in a coil in a magnetic field, the coil also receives a force by the Lorentz force acting on the moving electric charge, and the moving block 420 can move by this force. The module support member 410 may be moved while the moving block 420 moves, and the rear module 300 may be moved while the module support member 410 moves.

The movement guider 430 is disposed on the side of the movement block 420 . The movement guider 430 may guide the movement block 420 to move in a predetermined direction. Since the movement guider 430 guides the movement block 420 , it can also guide the module support member 410 and the rear module 300 moving together with the movement block 420 .

The movement guider 430 may be disposed on a side surface of the display panel 100 . The movement guider 430 may be disposed on a side surface of the display panel 100 to fix the display panel 100 . Accordingly, since there is no need to separately form the side cover, the bezel area, which is a non-display area of the display device, can be reduced, and the aesthetics of the side surface of the display can be saved.

The protection member 500 may be disposed behind the driving module 400 to protect the display panel 100 , the sound output module 200 , the rear module 300 , and the driving module 400 from external physical impact. For example, the protection member 500 may prevent damage and malfunction of the display device. In addition, the protection member 500 may protect the display device from external physical impact as well as pressure and high temperature. According to an example, the protection member 500 may be implemented with tempered glass.

Referring back to FIG. 1A , the detachment state of the sound generating module 200 and the rear module 300 is shown.

The driving module 400 may adjust the distance between the sound generating module 200 and the rear module 300 . The display panel 100 may output the sound of the first frequency band or the sound of the second frequency band as the distance between the sound generating module 200 and the rear module 300 is adjusted.

The display panel 100 outputs the sound H1 of the first frequency band in the detached state. Here, the sound H1 of the first frequency band corresponds to a high-pitched sound as a sound of a high frequency band, and may be, for example, a band suitable for a human voice region and music reproduction. In addition, the high frequency band may be 3 kHz or more, but is not limited thereto. Since the sound generating module 200 is formed on a portion of the rear surface of the display panel 100 , vibration is applied to a portion of the display panel 100 so that the display panel 100 vibrates. Since the sound generating module 200 includes a piezoelectric element capable of realizing high vibration, when the sound generating module 200 vibrates alone and gives vibration to the display panel 100, the display panel 100 outputs a sound of a high frequency band. can

The display device according to the present application is implemented in the speaker mode in the detachable state. In the speaker mode, the display device may increase the sense of reality of the image by matching the generation position of the image with the generation position of the sound, and may improve the immersion of the viewer watching the image. Further, since it is not necessary to configure a separate speaker, the degree of freedom for the arrangement of the speaker can be improved, and the design aesthetics of the set device can be improved.

Referring again to FIG. 1B , the attachment state of the sound generating module 200 and the rear module 300 is shown.

The display panel 100 outputs the sound H2 of the second frequency band in the attached state. Here, the sound H2 of the second frequency band corresponds to, for example, a sound in a band of 100 Hz to 500 Hz, and may be a band suitable for a compensation frequency for internal noise of a vehicle. Since the rear module 300 is formed to correspond to the entire rear surface of the display panel 100 , when the rear module 300 vibrates together, the entire display panel 100 can be vibrated at once. As described above, if the divided vibration is minimized while vibrating the entire display panel 100 at once, the display panel 100 may output the sound H2 of the second frequency band.

The display device according to the present application is implemented in the noise canceling mode in the attached state. The display device outputs a compensation frequency to cancel noise in the noise canceling mode. For example, since the noise inside the vehicle corresponds to a frequency that cannot be output by the display device having only the sound output module 200 due to a low frequency band, the display device according to the present application attaches the rear module 300 to the frequency band. It is possible to output a compensation frequency with a low band.

Since the display device outputs a compensation frequency having a waveform opposite to that of the noise inside the vehicle in the attached state, the compensation frequency and the noise may be offset, and indoor noise may be reduced. In addition, since the noise is not canceled by the audio formed on the side of the vehicle, but the noise is offset in the area corresponding to the front of the display panel 100, accurate cancellation of the noise wavelength is possible, and the front of the display panel 100 It may be easy to reduce noise in an environment, such as inside a vehicle, where noise flows through.

The display device according to the present application may selectively implement a speaker mode and a noise canceling mode by utilizing the rear module 300 and the driving module 400 . Therefore, when the room noise is not severe, the speaker mode is used to increase the realism of the video to improve the immersion of the viewer watching the video, and when the room noise is severe, the noise canceling mode is used to cancel the noise, thereby reducing the internal noise. can be reduced

FIG. 2A is a graph illustrating a frequency in a speaker mode in the display device according to the first embodiment of the present application, and FIG. 2B is a frequency in the noise canceling mode in the display device according to the first embodiment of the present application. It is a graph to show

Referring to FIGS. 2A and 2B , it can be seen that the frequency in the noise canceling mode is reduced compared to the frequency in the speaker mode. Specifically, the frequency in the speaker mode, for example, the first frequency, represents one wavelength up to T1, and the frequency in the noise canceling mode, for example, the second frequency, represents half a wavelength up to T1. Accordingly, it can be seen that the second frequency is halved compared to the first frequency. In addition, this graph corresponds to an example for showing that the second frequency is reduced compared to the first frequency, and the second frequency does not always have to have a half value of the first frequency. Accordingly, it is possible to adjust the output frequency band by designing the display device so that the second frequency corresponds to the noise compensation frequency band.

By implementing the display device capable of selectively outputting the first frequency and the second frequency as described above, the speaker mode and the noise canceling mode can be selectively implemented, and the speaker and noise canceling functions can be integrated.

3A is a cross-sectional view illustrating a speaker mode of a display device according to a second exemplary embodiment of the present application, and FIG. 3B is a cross-sectional view illustrating a noise canceling mode of the display apparatus according to the second exemplary embodiment of the present application.

3A and 3B , the display device includes a display panel 100 , a sound generating module 200 , a rear module 600 , a driving module 400 , and a protection member 500 . Hereinafter, redundant descriptions of the configurations and effects overlapping with those of FIGS. 1A and 1B will be omitted and only the features of the rear module 600 will be described.

The rear module 600 is disposed on the rear side of the sound generating module 200 . The rear module 600 includes a module receiving groove 610 .

The module receiving groove 610 has a size corresponding to the sound generating module 200 so that the sound generating module 200 can be accommodated. The module receiving groove 610 may accommodate the sound generating module 200 while the rear module 600 is attached to the sound generating module 200 . Accordingly, in the rear module 600 , the remaining part except for the module receiving groove 610 may be attached to the rear surface of the display panel 100 , and an empty space is not formed between the rear module 600 and the display panel 100 . .

The sound generating module 200 is accommodated in the module receiving groove 610 and does not form an empty space on the side, so that the deformable vibration layer expands and contracts laterally and vibrates is limited, and relatively compared to a structure in which an empty space is provided on the side. to generate low vibration. In addition, since the contact area increases as the rear module 600 is attached to the rear surface of the display panel 100 , the vibration frequency output from the display panel 100 decreases.

The display device according to the present application may more effectively output the sound of the low and medium frequency band by having the module receiving groove 610 . Accordingly, it may be easy to implement the noise canceling mode.

The display device according to the present application may selectively implement a speaker mode and a noise canceling mode by utilizing the rear module 600 and the driving module 400 . Therefore, when the room noise is not severe, the speaker mode is used to increase the realism of the video to improve the immersion of the viewer watching the video, and when the room noise is severe, the noise canceling mode is used to cancel the noise, thereby reducing the internal noise. can be reduced

The display device according to the embodiment of the present application includes a liquid crystal display panel, an organic light emitting diode (OLED) display panel, a quantum dot display panel, and an electroluminescent display panel, etc. Any type of display panel may be used, and it is not limited to a specific display panel capable of generating sound by vibrating by the sound generating module 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 display apparatus according to the embodiment of the present application is a mobile device, a video phone, a smart watch (smart watch), a watch phone (watch phone), a wearable device (wearable device), a foldable device (foldable device), a rollable device (rollable device), bendable device (bendable device), flexible device (flexible device), curved device (curved device), electronic notebook, e-book, PMP (portable multimedia player), PDA (personal digital assistant), MP3 player , mobile medical device, desktop PC, laptop PC, netbook computer, portable computer, workstation, navigation, vehicle navigation, television, wallpaper ), laptops, monitors, cameras, camcorders, display devices for vehicles, 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 may include a display panel, a sound generating module disposed on the rear surface of the display panel, a rear module disposed on the rear surface of the sound generating module, and a driving module for selectively attaching the rear module to the sound generating module. can

According to some embodiments of the present application, the sound generating module may directly vibrate the display panel, and the display panel may vibrate according to the vibration of the sound generating module to output a sound.

According to some embodiments of the present application, the sound generating module may include a piezoelectric element.

According to some embodiments of the present application, the rear module may include an elastic polymer.

According to some embodiments of the present application, the elastic polymer may be one of silicone, acrylic, and urethane.

According to some embodiments of the present application, the rear module has a module receiving groove for accommodating the sound generating module, and the sound generating module may be accommodated in the module receiving groove.

According to some embodiments of the present application, the driving module may selectively attach the rear module to the sound generating module using a linear motor method or a ball screw motor method.

According to some embodiments of the present application, the driving module may selectively attach the rear module to the sound generating module in response to a button operation.

According to some embodiments of the present application, the driving module includes a control unit for generating a module movement signal according to input information, a module support member for supporting the rear module, a moving block for moving the module support member according to the module movement signal, and movement It may include a movement guider for guiding the block.

According to some embodiments of the present application, the display panel outputs the sound of the first frequency band when the sound generating module and the rear module are detached, and outputs the sound of the second frequency band when the sound generating module and the rear module are attached. can

According to some embodiments of the present application, the sound of the first frequency band may be a high-pitched sound, and the sound of the second frequency band may be a mid-bass sound.

The display device according to the present application includes a display panel, a sound generating module disposed on the rear side of the display panel, a rear module disposed on the rear side of the sound generating module, and a driving module for adjusting the distance between the sound generating module and the rear module, , the display panel outputs the sound of the first frequency band or the sound of the second frequency band as the distance between the sound generating module and the rear module is adjusted.

According to some embodiments of the present application, the sound of the first frequency band may be output when the sound generating module and the rear module are detached, and the sound of the second frequency band may be output when the sound generating module and the rear module are attached. can

According to some embodiments of the present application, the sound generating module may include a piezoelectric element, and the rear module may include an elastic polymer.

According to some embodiments of the present application, the sound of the first frequency band may be a high-pitched tone, and the sound of the second frequency band may be a mid-bass tone.

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.

100: display panel 200: sound generating module
300: rear module 400, 600: drive module
410: module support member 420: moving block
430: movement guider 500: protection member

Claims (15)

display panel;
a sound generating module disposed on a rear surface of the display panel;
a rear module disposed on a rear surface of the sound generating module; and
and a driving module for selectively attaching the rear module to the sound generating module. The method of claim 1,
The sound generating module directly vibrates the display panel,
The display panel vibrates according to the vibration of the sound generating module to output a sound. The method of claim 1,
The sound generating module includes a piezoelectric element, a display device. The method of claim 1,
wherein the rear module comprises an elastic polymer. 5. The method of claim 4,
The elastic polymer is one of silicone, acrylic, and urethane. The method of claim 1,
The rear module has a module receiving groove for accommodating the sound generating module,
The sound generating module is accommodated in the module receiving groove, a display device. The method of claim 1,
The driving module selectively attaches the rear module to the sound generating module using a linear motor method or a ball screw motor method. The method of claim 1,
and the driving module selectively attaches the rear module to the sound generating module in response to a button operation. The method of claim 1,
The driving module is
a control unit generating a module movement signal according to input information;
a module support member for supporting the rear module;
a moving block for moving the module supporting member according to the module moving signal; and
A display device comprising a movement guider for guiding the movement block. The method of claim 1,
The display panel outputs a sound of a first frequency band when the sound generating module and the rear module are detached, and outputs a sound of a second frequency band when the sound generating module and the rear module are attached. 11. The method of claim 10,
The sound of the first frequency band is a high-pitched sound, and the sound of the second frequency band is a mid-bass tone. display panel;
a sound generating module disposed on a rear surface of the display panel;
a rear module disposed on a rear surface of the sound generating module; and
And a driving module for adjusting the distance between the sound generating module and the rear module,
The display panel may output a sound of a first frequency band or a sound of a second frequency band as a distance between the sound generating module and the rear module is adjusted. 13. The method of claim 12,
The sound of the first frequency band is output when the sound generating module and the rear module are detached,
The sound of the second frequency band is output when the sound generating module and the rear module are attached to each other. 13. The method of claim 12,
The sound generating module includes a piezoelectric element, and the rear module includes an elastic polymer. 13. The method of claim 12,
The sound of the first frequency band is a high-pitched sound, and the sound of the second frequency band is a mid-bass tone.

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