Display device

Abstract

The utility model provides a display device, relates to the technical field of display, and is used for solving the problem that a display panel is poor in low-frequency sound production performance, the display device comprises a display panel, a backlight assembly, a supporting transmission assembly and an exciter, the backlight assembly is provided with a vibration area, and the backlight assembly comprises a lamp panel and an optical film assembly; the display panel is located on the light emitting side of the optical film assembly, and a cavity is formed between the optical film assembly and the display panel; the lamp panel is located on the light incident side of the optical film assembly and comprises a first lamp panel and a second lamp panel which are arranged in parallel, the first lamp panel is arranged in the vibration area, and the second lamp panel is arranged outside the vibration area; the supporting transfer assembly is supported between the first lamp panel and the optical film assembly; the exciter is arranged on the side, away from the optical film assembly, of the first lamp panel and comprises an actuating piece, a damper and a shell, the vibration output end of the actuating piece is connected with the first lamp panel, and the damper is connected between the actuating piece and the shell. The low-frequency sound production of the display panel can be realized by using relatively small amplitude.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display device. BACKGROUND

[0002] With the development of science and technology and the improvement of people's living standards, display devices are increasingly applied in people's work and life.

[0003] In the related art, a display device includes a display panel, a lamp panel, a back plate, an exciter, and a rear shell, etc. The lamp panel is arranged on a side away from a display surface of the display panel. The exciter is arranged on a side of the lamp panel away from the display panel and is bonded to the back plate. The exciter drives the lamp panel to vibrate to drive the display panel to vibrate and emit sound. The rear shell is connected to the back plate to provide support for the back plate and other structures.

[0004] However, in the related art, a large amplitude is required to achieve a high sound pressure, but the large amplitude affects the reliability and display performance of the display panel, resulting in that the display device can only realize small-amplitude high-frequency sound emission above 300 Hz, and the low-frequency sound emission performance is poor. UTILITY MODEL CONTENT

[0005] In view of the above problems, some embodiments of the present application provide a display device which can realize low-frequency sound emission performance of a display panel with a smaller amplitude, and can also improve vibration transmission efficiency and ensure sound emission effect.

[0006] To achieve the above purpose, some embodiments of the present application provide the following technical solutions:

[0007] Some embodiments of the present application provide a display device, comprising: a display panel, configured to display an image; a backlight assembly, the backlight assembly comprising a vibration region in a plane direction of the backlight assembly, the backlight assembly comprising a lamp panel and an optical film assembly, the lamp panel being located on an incident light side of the optical film assembly, the display panel being located on an outgoing light side of the optical film assembly, a cavity being formed between the optical film assembly and the display panel, the lamp panel comprising a first lamp panel and a second lamp panel, the first lamp panel and the second lamp panel being arranged side by side along a side length direction of the display panel, the first lamp panel being arranged in the vibration region, the second lamp panel being arranged outside the vibration region; a support transmission assembly, supporting between the first lamp panel and the optical film assembly; an exciter, arranged on a side of the first lamp panel away from the optical film assembly, the exciter comprising an actuator, a spring, and a housing, a vibration output end of the actuator being connected to the first lamp panel, one end of the spring being connected to the actuator, the other end of the spring being connected to the housing.

[0008] The display device provided by some embodiments of the present application directly drives the first lamp plate through the exciter, so that the first lamp plate directly transmits vibration to the optical film assembly through the support transmission assembly, and the optical film assembly indirectly drives the display panel to vibrate through the cavity. In this way, while ensuring the transmission efficiency, the display panel can be uniformly stressed in the full plane range, the actual vibration area of the display panel is increased, and thus the low-frequency sound performance can be realized by using a smaller amplitude (for example, 0.3 mm). In addition, the actuating piece of the exciter is prone to generate a large amount of heat due to reciprocating vibration. The elastic wave is arranged to connect the shell and the actuating piece of the exciter, and the heat generated by the vibration of the actuating piece is transmitted to the shell for heat dissipation. In this way, the heat generated by the actuating piece can be dissipated not only through the air but also through the elastic wave, which is conducive to reducing the temperature of the actuating piece and avoiding the influence of the local temperature rise of the display panel on the image display quality, thereby improving the image display quality of the display device.

[0009] In some embodiments, the optical film assembly comprises a diffusion plate, and the support transmission assembly comprises a plurality of support pieces, the plurality of support pieces are arranged at intervals along the plate surface of the first lamp plate, one end of the support piece is connected with the first lamp plate, and the other end is connected with the diffusion plate.

[0010] In some embodiments, the elastic wave comprises a fiber layer and a heat-conducting layer arranged in layers, and the heat-conducting layer is in contact with the shell.

[0011] In some embodiments, the following is included:

[0012] The elastic wave comprises two fiber layers and a heat-conducting layer, and the heat-conducting layer is arranged between the two fiber layers;

[0013] Alternatively, the elastic wave comprises a fiber layer and two heat-conducting layers, and the fiber layer is located between the two heat-conducting layers;

[0014] Alternatively, the elastic wave comprises at least two fiber layers and at least two heat-conducting layers, and the at least two fiber layers and the at least two heat-conducting layers are arranged in layers in an alternating manner.

[0015] In some embodiments, the heat-conducting layer has a plurality of heat dissipation holes penetrating through the opposite side surfaces of the heat-conducting layer.

[0016] In some embodiments, the elastic wave comprises a heat-conducting film and a fiber layer arranged in layers, and the heat-conducting film is provided with a plurality of through holes.

[0017] In some embodiments, the exciter further comprises a heat-conducting compression ring configured to compress the elastic wave on the shell.

[0018] In some embodiments, the exciter further comprises a magnetic assembly, the magnetic assembly comprising a magnetic conducting piece and a magnetic piece, a magnetic gap being formed between the magnetic conducting piece and the magnetic piece, and the actuating piece being located in the magnetic gap away from one end of the vibration output end thereof; and one end of the spring wave is connected to the shell through the magnetic conducting piece.

[0019] In some embodiments, the display device further comprises a back plate, the back plate being arranged on a side of the lamp plate away from the display panel, and the second lamp plate being fixedly connected to the back plate.

[0020] In some embodiments, the first lamp plate is configured to move relative to the second lamp plate under the pushing of the exciter.

[0021] In some embodiments, the first lamp plate is connected to the back plate through a first elastic connecting piece.

[0022] Alternatively, the first lamp plate is connected to the second lamp plate adjacent thereto through a second elastic connecting piece.

[0023] In some embodiments, the exciter is fixedly connected to the back plate, and the exciter is configured to support the first lamp plate. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 A schematic diagram of an operating scenario between a display device and a control device according to some embodiments of the present application;

[0026] Figure 2 A configuration block diagram of a display device according to some embodiments of the present application;

[0027] Figure 3 A structural schematic diagram of a display device according to some embodiments of the present application;

[0028] Figure 4 A partial cross-sectional schematic diagram of a display device according to some embodiments of the present application;

[0029] Figure 5 A cooperation schematic diagram of a first lamp plate and a second lamp plate according to some embodiments of the present application;

[0030] Figure 6 Another cooperation schematic diagram of a first lamp plate and a second lamp plate according to some embodiments of the present application;

[0031] Figure 7 Another cooperation schematic diagram of the first lamp plate and the second lamp plate in some embodiments of the present application;

[0032] Figure 8 Another cooperation schematic diagram of the first lamp plate and the second lamp plate in some embodiments of the present application;

[0033] Figure 9 Another cooperation schematic diagram of the first lamp plate and the second lamp plate in some embodiments of the present application;

[0034] Figure 10 Another cooperation schematic diagram of the first lamp plate and the second lamp plate in some embodiments of the present application;

[0035] Figure 11 A sectional schematic diagram of the exciter in some embodiments of the present application;

[0036] Figure 12 A sectional schematic diagram of the elastic wave in some embodiments of the present application;

[0037] Figure 13 A structural schematic diagram of the elastic wave in some embodiments of the present application;

[0038] Figure 14 Another structural schematic diagram of the elastic wave in some embodiments of the present application;

[0039] Figure 15 Another sectional schematic diagram of the elastic wave in some embodiments of the present application;

[0040] Figure 16 Another sectional schematic diagram of the elastic wave in some embodiments of the present application;

[0041] Figure 17 Another structural schematic diagram of the elastic wave in some embodiments of the present application;

[0042] Figure 18 Another structural schematic diagram of the elastic wave in some embodiments of the present application.

[0043] Reference signs:

[0044] 10 - display device; 20 - intelligent device; 30 - server;

[0045] 900 - control device; 901 - tuning demodulator; 902 - communicator; 903 - detector;

[0046] 904 - external device interface; 905 - controller; 906 - display; 907 - audio output interface;

[0047] 908 - memory; 909 - power supply; 910 - user interface;

[0048] 100 - display panel; 110 - optical film assembly; 111 - diffusion plate;

[0049] 200 - backlight assembly; 210 - lamp plate; 210a - first lamp plate; 210b - second lamp plate;

[0050] 211 - first elastic connecting piece; 212 - adhesive structure; 213 - second elastic connecting piece;

[0051] 230 - lamp plate body; 240 - light source; 250 - reinforcing plate; 251 - sub-plate;

[0052] 300 - support; 500 - back plate;

[0053] 400 - exciter; 410 - actuating piece; 411 - sheet-shaped connecting structure; 420 - elastic wave;

[0054] 4201 - wavy body; 4202 - first connecting portion; 4203 - second connecting portion; 421 - fiber layer;

[0055] 422 - heat-conducting layer; 423 - heat-conducting film; 4231 - through hole; 430 - housing; 431 - air hole;

[0056] 440 - heat-conducting compression ring; 450 - magnetic assembly; 451 - magnetic conducting piece; 4511 - air hole; 452 - magnetic piece;

[0057] 460 - elastic pad; M - cavity; N - magnetic air gap. DETAILED DESCRIPTION

[0058] For the purpose of making the purpose, implementation and advantages of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to clearly and completely describe the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0059] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0060] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, the product or equipment including a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or equipment.

[0061] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0062] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0063] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0064] In the related art, the display device includes a display panel, a lamp panel, a back plate, an exciter and a rear shell, etc., the lamp panel is arranged on the side away from the display surface of the display panel, the exciter is arranged on the side of the lamp panel away from the display panel and is bonded with the back plate, the lamp panel is driven to vibrate by the exciter to drive the display panel to vibrate and sound, and the rear shell is connected with the back plate to provide support for the back plate and other structures. However, the display panel is directly driven to sound by the exciter, since the exciter is arranged at a certain position of the lamp panel, the display panel generates the maximum amplitude at the position of the exciter, the amplitude accumulation away from the position of the exciter is reduced, and the actual vibration area is small. If a high sound pressure is to be achieved, a large amplitude is needed, but the large amplitude affects the reliability and display performance of the display panel, resulting in that the display device can only realize small-amplitude high-frequency sound above 300Hz, and the low-frequency sound performance is poor.

[0065] Therefore, some embodiments of the present application provide a display device, a first lamp plate is directly driven by an exciter, so that the first lamp plate directly transmits vibration to an optical film assembly through a support transmission assembly, and the optical film assembly indirectly drives a display panel to vibrate through a cavity. In this way, the display panel can be uniformly stressed in a full plane range while ensuring transmission efficiency, the actual vibration area of the display panel is increased, and low-frequency sound performance can be realized by using a smaller amplitude (for example, 0.3 mm). In addition, the actuator of the exciter is prone to generate a large amount of heat due to reciprocating vibration. The elastic wave is arranged to connect the shell and the actuator of the exciter, and the heat generated by the vibration of the actuator is transmitted to the shell for heat dissipation. In this way, the heat generated by the actuator can be dissipated not only through the air but also through the elastic wave, which helps to reduce the temperature of the actuator and avoid the influence of the heat transferred to the display panel on the image display quality, thereby improving the image display quality of the display device.

[0066] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0067] The display device provided by some embodiments of the present application can have various implementation forms. For example, the display device can be a television, a smart television, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 And Figure 2 This is a specific implementation of the display device of the present application.

[0068] Figure 1 This is an operation scenario diagram between a display device and a control device in some embodiments of the present application. As shown in Figure 1 A user can operate the display device 10 through the smart device 20 or the control device 900.

[0069] In some embodiments, the control device 900 can be a remote controller. The communication between the remote controller and the display device includes infrared protocol communication or Bluetooth protocol communication, and other short-distance communication modes. The display device 10 is controlled by a wireless or wired manner. The user can input a user instruction through a key on the remote controller, voice input, control panel input, etc. to control the display device 10.

[0070] In some embodiments, a smart device 20 (such as a mobile terminal, a tablet, a computer, a notebook, etc.) can also be applicable to control the display device 10. For example, the display device 10 is controlled using an application program running on the smart device.

[0071] In some embodiments, the display device can not accept instructions using the smart device or the control device described above, but can receive user control through touch or gesture, etc.

[0072] In some embodiments, the display device 10 can also be controlled in ways other than the control device 900 and the smart device 20, for example, the display device 10 can directly receive user voice instructions through a voice instruction acquisition module configured inside the display device, or can receive user voice instructions through a voice control device provided outside the display device 10.

[0073] In some embodiments, the display device 10 also communicates data with a server 30. The display device 10 can be allowed to communicate through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 30 can provide various content and interaction to the display device 10. The server 30 can be a cluster or multiple clusters, and can include one or more types of servers.

[0074] Figure 2 A configuration block diagram of a display device is shown for some embodiments of the present application. As shown in Figure 2 The display device 10 includes a tuner demodulator 901;

[0075] In some embodiments, the display device 10 includes a communicator 902;

[0076] In some embodiments, the display device 10 includes a detector 903;

[0077] In some embodiments, the display device 10 includes an external device interface 904;

[0078] In some embodiments, the display device 10 includes a controller 905;

[0079] In some embodiments, the display device 10 includes a display 906;

[0080] In some embodiments, the display device 10 includes an audio output interface 907;

[0081] In some embodiments, the display device 10 includes a memory 908;

[0082] In some embodiments, the display device 10 includes a power supply 909;

[0083] In some embodiments, the display device 10 comprises at least one of the user interface 910.

[0084] In some embodiments, the controller comprises a processor;

[0085] In some embodiments, the controller comprises a video processor;

[0086] In some embodiments, the controller comprises an audio processor;

[0087] In some embodiments, the controller comprises a graphics processor;

[0088] In some embodiments, the controller comprises a RAM;

[0089] In some embodiments, the controller comprises a ROM;

[0090] In some embodiments, the controller comprises a first to an nth signal interface for input / output.

[0091] In some embodiments, the display 906 comprises a display screen component configured to present a picture, and a driving component to drive the image display, for receiving the image signal originated from the controller output, and to display the video content, the image content, and the menu control interface component, and the user control UI interface.

[0092] In some embodiments, the display 906 can be a liquid crystal display, an OLED display, and a projection display, and can also be a projection device and a projection screen.

[0093] In some embodiments, the communicator 902 is a component configured to communicate with external devices or servers according to various communication protocol types. For example, the communicator can comprise at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 10 can establish the sending and receiving of control signals and data signals with the control apparatus 900 or the server 30 through the communicator 902.

[0094] In some embodiments, the user interface 910 can be configured to receive the control signal of the control apparatus 900 (such as an infrared remote controller, etc.).

[0095] In some embodiments, the detector 903 is configured to collect signals of the external environment or interaction with the outside. For example, the detector 903 comprises a light receiver for collecting the intensity of ambient light; or the detector 903 comprises an image collector, such as a camera, which can be used to collect the external environment scene, the attribute of the user or the user interaction gesture; or the detector 903 comprises a sound collector, such as a microphone, for receiving external sound.

[0096] In some embodiments, the external device interface 904 can include, but is not limited to, any one or more of a high-definition multimedia interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, etc. The input / output interface can also be a composite input / output interface formed by a plurality of the above interfaces.

[0097] In some embodiments, the tuner-demodulator 901 receives broadcast television signals through wired or wireless reception, and demodulates audio / video signals and EPG data signals from a plurality of wireless or wired broadcast television signals.

[0098] In some embodiments, the controller 905 and the tuner-demodulator 901 can be located in different separate devices, i.e., the tuner-demodulator 901 can also be in an external device of the main device where the controller 905 is located, such as an external set-top box, etc.

[0099] The controller 905 controls the operation of the display device and responds to user operations by storing various software control programs in the memory. The controller 905 controls the overall operation of the display device 10. For example, in response to receiving a user command for selecting a UI object displayed on the display 906, the controller 905 can perform an operation related to the object selected by the user command.

[0100] In some embodiments, the controller includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first to n-th interface for input / output, a communication bus, etc.

[0101] The user can input a user command through a graphical user interface (GUI) displayed on the display 906, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user can input a user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through a sensor.

[0102] A "user interface" is a medium interface for interaction and information exchange between an application program or operating system and a user, which realizes the conversion between the internal form of information and the form acceptable by the user. The commonly used form of a user interface is a graphic user interface (GUI), which refers to a user interface related to computer operation displayed in a graphical manner. It can be an icon, window, control, etc. interface element displayed in the display screen of an electronic device, wherein the control can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0103] <Composition of a display device>

[0104] Please refer to Figure 3 It is shown that some embodiments of the present application provide a display device 10, which can be a liquid crystal display device 10. The display device 10 includes a display panel 100;

[0105] In some embodiments, the display device 10 includes a backlight assembly 200;

[0106] In some embodiments, the display device 10 includes a support transmission assembly;

[0107] In some embodiments, the display device 10 includes an exciter 400;

[0108] In some embodiments, the display device 10 includes a back plate 500.

[0109] In some embodiments, the display 906 includes a display panel 100 and a backlight assembly 200;

[0110] The display panel 100 is used to display images, and the backlight assembly 200 can be a direct backlight assembly. At this time, the backlight assembly 200 includes a lamp plate 210 and an optical film assembly 110, the lamp plate 210 is located on the light incident side of the optical film assembly 110, and the display panel 100 is located on the light exit side of the optical film assembly 110, so as to provide backlight for the display panel 100 by the light source of the lamp plate 210. A cavity M is formed between the display panel 100 and the optical film assembly 110, the exciter 400 is arranged on the side of the lamp plate 210 away from the optical film assembly 110, the support transmission assembly is supported between the lamp plate 210 and the optical film assembly 110, the back plate 500 can be used to support the backlight assembly 200 and the display panel 100, the exciter 400 is used to drive the lamp plate 210 to vibrate, the lamp plate 210 compresses the gas in the cavity M when vibrating, and the vibration is transmitted to the display panel through the cavity M to drive the display panel 100 to vibrate, so that the display panel 100 can be used for display and can also be used to replace the loudspeaker to emit sound.

[0111] It should be noted that the cavity M can be a closed cavity or a non-closed cavity, as long as the vibration can be transmitted to the display panel through the cavity, which is not limited here.

[0112] The gap size of the cavity M can be determined according to the light source of the lamp plate 210, for example, the gap size is related to the size of the light source, and the light source such as a sub-millimeter light-emitting diode (Mini-LED) has a relatively compact size, so the gap of the cavity M between the lamp plate 210 and the liquid crystal display panel is relatively small, thereby reducing the thickness of the cavity M and improving the vibration transmission effect of the cavity M. Therefore, in this embodiment, the light source of the backlight assembly 200 is a sub-millimeter light-emitting diode (Mini-LED).

[0113] For example, the gap of the cavity M can be 0.3mm-10mm, the maximum gap of the cavity M can be 10mm, or the gap of the cavity M can also be 0.3mm or 1mm, etc. For example, when the gap of the cavity M is 1mm, the thickness of the cavity M is relatively small, which can improve the transmission efficiency of the vibration force output by the exciter; or when the gap of the cavity M is 0.3mm, the distance between the exciter 400 and the display panel 100 is relatively close, and the vibration is more intense, and the sound effect is better. When the gap of the cavity M is 10mm, the thickness of the cavity M is relatively large, which can avoid the mutual collision between the display panel 100 and the light source at a certain position during vibration. Specifically, the gap of the cavity M can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. It should be noted that the numerical values and numerical ranges involved in the embodiments of the present application are approximate values, and there can be a certain range of errors due to the manufacturing process, which can be considered negligible by those skilled in the art.

[0114] Compared with the display device with the OLED light source as the light source, because the OLED display screen is a self-luminous screen, and the OLED display screen itself has a certain flexibility, the exciter is arranged on the back of the OLED display screen, so that the OLED display screen can be elastically deformed and make sound under the excitation vibration of the exciter. In the liquid crystal display device, the liquid crystal display device has a backlight module, and the exciter 400 cannot be directly arranged on the back of the display panel 100, and the lamp plate 210 in the backlight assembly 200 has a large hardness, and it is difficult to couple and transmit the vibration of the lamp plate 210 to the display panel 100, and the transmission efficiency of the vibration force is low. Therefore, the support can be arranged between the display panel 100 and the lamp plate 210 of the Mini-LED display device or other liquid crystal display device, and the support is used as a transmission medium of vibration to transmit the vibration of the lamp plate 210 to the display panel 100, thereby improving the transmission efficiency of the vibration from the lamp plate 210 to the display panel 100. In addition, the support can maintain the gap of the cavity M between the lamp plate and the display panel within a predetermined range, avoiding the problem of collision noise and abrasion caused by the mutual contact of the light source and the display panel 100 at a certain position.

[0115] Next, the structures of the display device 10 will be described in sequence with the light source of the backlight assembly 200 as an example of a sub-millimeter light emitting diode (Mini-LED) and in combination with the accompanying drawings.

[0116] <Display panel 100>

[0117] In some embodiments, the display panel 100 is used to display image information such as text and images. The display panel 100 includes a display area and a circuit board located on one side of the display area, and the entire display panel 100 is driven and displayed through the circuit board.

[0118] The display panel 100 is the main component of the display device 10, which mainly includes a liquid crystal display panel 100, a color filter (CF) substrate, a thin film transistor (TFT) substrate (also called an array substrate), and a liquid crystal (LC) layer. The liquid crystal layer is located between the color filter substrate and the array substrate. The thin film transistor substrate is provided with a data line and a scan line, and the direction of the liquid crystal molecules is controlled by whether the data line and the scan line are energized, so that the light of the light source 240 is emitted through the color filter substrate and a picture of a predetermined color is generated.

[0119] <Frame>

[0120] The frame can be arranged around the periphery of the display panel 100, and the shape of the frame matches the shape of the display panel 100. For example, the display panel 100 is square, and the frame can be a square frame structure. On the one hand, the frame can support or assist in supporting the display panel 100. On the other hand, the outer side of the frame can function as a decorative strip.

[0121] In some embodiments, the frame can also include a top side, a left side, a right side, and a bottom side. The corresponding relationship and connection relationship of the top side, the left side, the right side, and the bottom side of the frame can be consistent with the corresponding relationship and connection relationship of the top side, the left side, the right side, and the bottom side of the display panel 100. Details are not repeated here.

[0122] <Backlight assembly 200>

[0123] Since the liquid crystal display panel 100 cannot emit light by itself, in order for the display device 10 to display normally, the display device 10 further includes a backlight assembly 200. The backlight assembly 200 includes a lamp panel 210 arranged on the side away from the display surface of the display panel 100. The lamp panel 210 is used to generate light and is configured to provide backlight to the display panel 100.

[0124] It can be understood that the lamp panel 210 is to provide sufficient brightness and uniform distribution of backlight to the display panel 100. The display panel 100 can modulate the backlight as needed to display different images.

[0125] In some embodiments, the lamp panel 210 can include a lamp panel body 230 and a light source 240. The lamp panel body 230 can be an aluminum plate, a printed circuit board (PCB), etc. The light source 240 can be a light-emitting diode (LED), a mini light-emitting diode (Mini LED), or a micro light-emitting diode (Micro LED).

[0126] The light source 240 can be multiple, and the multiple light sources 240 are arranged on the side of the lamp panel body 230 facing the display panel 100 and are arranged at intervals to provide backlight to the display panel 100.

[0127] The light source 240 includes but is not limited to a lamp bead. The multiple light sources 240 can be fixed on the lamp panel body 230 by clamping, threaded connection, etc.

[0128] In some embodiments, the backlight assembly 200 includes a vibration region and a vibration suppression region (i.e., a region outside the vibration region) in a self-plane direction of the backlight assembly 200. For example, the vibration region can be located in a middle portion of the backlight assembly 200, and the vibration suppression region can surround the vibration region. The lamp plate 210 includes a first lamp plate 210a and a second lamp plate 210b. The first lamp plate 210a is disposed in the vibration region, and the second lamp plate 210b is disposed in the vibration suppression region. In this way, the exciter 400 can be disposed on a side of the first lamp plate 210a facing away from the display panel 100. The exciter 400 is configured to drive the first lamp plate 210a to vibrate. The support transmission assembly is disposed between the first lamp plate 210a and the optical film assembly 110. In this way, the support transmission assembly can transmit the vibration from the side of the first lamp plate 210a to the optical film assembly 110. Then, the optical film assembly 110 transmits the vibration to the display panel 100 through the cavity M, so that the display panel 100 can vibrate to produce sound.

[0129] The first lamp plate 210a and the second lamp plate 210b can be annularly arranged in sequence. For example, the second lamp plate 210b is arranged around the outer periphery of the first lamp plate 210a. Alternatively, the first lamp plate 210a and the second lamp plate 210b can be arranged side by side. For example, the first lamp plate 210a and the second lamp plate 210b can be arranged side by side along the length direction and / or the width direction of the display panel 100. In this way, the functions of the lamp plates can be ensured, and the space utilization can be improved.

[0130] It can be understood that the exciter 400 drives the first lamp plate 210a in the vibration region to vibrate, and transmits the vibration to the display panel 100 through the support transmission assembly, the optical film assembly 110, and the cavity M in sequence. The second lamp plate 210b in the vibration suppression region is not used to transmit the vibration. In this way, the problem that the display device 10 produces abnormal sound due to the large vibration area of the lamp plate 210 can be avoided.

[0131] It needs to be emphasized that the first lamp plate 210a and the optical film assembly 110 are connected through the support transmission assembly, and the optical film assembly 110 and the display panel 100 are separated by the cavity M, so the exciter 400 drives the first lamp plate 210a to vibrate to transmit the vibration to the optical film assembly 110 through the support transmission assembly, which belongs to direct driving and can ensure the transmission efficiency of the vibration; the vibration between the optical film assembly 110 and the display panel 100 is transmitted through the cavity M, and the air has a certain viscosity, that is, the optical film assembly 110 and the display panel 100 are transmitted through the viscous air gap, which is indirect driving, and the area of the optical film assembly 110 covers the area of the display panel 100, so that the display panel 100 is indirectly driven by the optical film assembly 110, which can make the display panel 100 uniformly stressed in the full plane range and increase the actual vibration area of the display panel 100, so that the display panel 100 can realize low-frequency sound performance with a smaller amplitude (for example, 0.3 mm) while ensuring the reliability and display performance of the display panel 100.

[0132] In the embodiments of the present application, please refer to Figure 5 As shown in the figure, the exciter 400 drives the first lamp plate 210a to move relative to the second lamp plate 210b. For example, when the exciter 400 drives the first lamp plate 210a to vibrate, the first lamp plate 210a moves independently of the second lamp plate 210b and generates displacement relative to the second lamp plate 210b. The first lamp plate 210a and the second lamp plate 210b have a certain displacement difference in the thickness direction of the display device 10, so that the second lamp plate 210b can avoid generating resistance to the first lamp plate 210a, the resistance required to be overcome by the exciter 400 is reduced, the vibration loss is reduced, and the vibration transmission efficiency is further ensured.

[0133] Considering that the exciter 400 and the first lamp plate 210a and the optical film assembly 110 belong to direct driving, and do not need to rely on the viscous force of the gas in the sealed air gap for transmission of the driving force, in the embodiments, the first lamp plate 210a and the second lamp plate 210b around it can be a non-sealed structure. On the one hand, this can reduce the reaction force of the gas between the first lamp plate 210a and the optical film assembly 110 on the first lamp plate 210a, reduce the driving resistance, and be conducive to improving the vibration transmission efficiency; on the other hand, it can reduce the amount of adhesive structure 212 used for installing the first lamp plate 210a and the second lamp plate 210b, thereby reducing the cost.

[0134] In some embodiments, please refer to Figure 1 As shown in the figure, the first lamp plate 210a and the back plate 500 are connected through the first elastic connecting piece 211, so that the back plate 500 can provide vibration support for the first lamp plate 210a.

[0135] For example, in Figure 1 the first lamp plate 210a can be attached to the back plate 500 by the elastic double-sided adhesive, and to prevent the display panel 100 from being too bright in some areas, when the first lamp plate 210a is attached to the back plate 500 by the elastic double-sided adhesive, it is necessary to ensure that the side surface of the first lamp plate 210a facing the display panel 100 is flush with the side surface of the second lamp plate 210b facing the display panel 100 after attachment, so that the image brightness of the display panel 100 is uniform.

[0136] Alternatively, the back plate 500 can be provided with a plurality of guide posts (not shown), for example, the guide posts can be mortise posts or other structures, and the guide posts can be four, the four corners of the first lamp plate 210a are respectively provided with guide holes matched with the guide posts, each guide post is arranged in the corresponding guide hole, and the outer side of the guide post is further sleeved with a first elastic connecting piece 211 such as a spring, both ends of the first elastic connecting piece 211 are respectively connected with the back plate 500 and the first lamp plate 210a, and when the first lamp plate 210a is in the initial vibration position, the side surface of the first lamp plate 210a facing the display panel 100 is flush with the side surface of the second lamp plate 210b facing the display panel 100, so that the image brightness of the display panel 100 is uniform.

[0137] Reference Figure 6In some alternative embodiments, the second lamp plate 210b is fixedly arranged, for example, the second lamp plate 210b is fixedly arranged with the back plate 500, and the first lamp plate 210a can be connected with the second lamp plate 210b through a second elastic connecting member 213, for example, the second elastic connecting member 213 is an elastic double-sided adhesive tape, an elastic pad, an elastic column, etc. For example, the periphery of the first lamp plate 210a is attached to the back plate 500 through the elastic double-sided adhesive tape, and the side surface of the first lamp plate 210a after attachment faces the display panel 100, which is flush with the side surface of the second lamp plate 210b facing the display panel 100, and the second lamp plate 210b is elastically connected with the first lamp plate 210a through the second elastic connecting member 213. In this way, the second elastic connecting member 213 can limit the movement distance of the first lamp plate 210a, so as to avoid that the vibration distance is too large to affect the uniformity of the image brightness of the display panel 100. In addition, the second elastic connecting member 213 can also reduce the accuracy of the relative position between the first lamp plate 210a and the second lamp plate 210b. That is, when the second elastic connecting member 213 is not arranged between the first lamp plate 210a and the second lamp plate 210b, the position between the first lamp plate 210a and the second lamp plate 210b needs to have high accuracy. If the accuracy is low, there may be hard contact between the first lamp plate 210a and the second lamp plate 210b, which interferes with each other or the spacing between the first lamp plate 210a and the second lamp plate 210b is too large. Therefore, in the embodiments of the present application, the second elastic connecting member 213 can reduce the position accuracy between the first lamp plate 210a and the second lamp plate 210b, and can make the image brightness of the display panel 100 uniform.

[0138] In addition to the elastic connection between the first lamp plate 210a and the back plate 500 and the elastic connection between the first lamp plate 210a and the second lamp plate 210b, in the embodiments, the exciter 400 can be fixedly connected with the back plate 500 to support the first lamp plate 210a. That is, the first lamp plate 210a has no direct connection relationship with the back plate 500, but the first lamp plate 210a is connected with the back plate 500 through the exciter 400. Further, in order to better support the first lamp plate 210a, in the embodiments, a high-resonant-frequency exciter 400 can be arranged at each of the four corners of the first lamp plate 210a. The four high-frequency exciters 400 have the functions of supporting and exciting vibration, so as to ensure that the first lamp plate 210a vibrates uniformly without deviation. The middle position of the first lamp plate 210a can be provided with a low-resonant-frequency exciter 400 (smaller elastic vibration system), which mainly serves to excite the first lamp plate 210a to vibrate.

[0139] In some possible embodiments, referring to Figures 7-10The display device 10 can further include a reinforcing plate 250. Specifically, the reinforcing plate 250 can have a thickness of 1 mm-4 mm, for example, the thickness of the reinforcing plate 250 can be 1 mm-2 mm, 2 mm-3 mm, 3 mm-4 mm, further, for example, the thickness of the reinforcing plate 250 can be 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, etc. The reinforcing plate 250 is attached to the side of the first lamp plate 210a away from the display panel 100, for example, the reinforcing plate 250 can be a honeycomb plate, and the reinforcing plate 250 can be fixedly attached to the first lamp plate 210a by an adhesive such as double-sided tape. The exciter 400 is connected to the reinforcing plate 250, so that the exciter 400 drives the reinforcing plate 250 to vibrate, thereby driving the first lamp plate 210a to vibrate. The reinforcing plate 250 is beneficial to enhancing the strength of the first lamp plate 210a and improving the vibration transmission efficiency. The first lamp plate 210a can also dissipate heat through the reinforcing plate 250.

[0140] In some embodiments, the reinforcing plate 250 is any one of a honeycomb plate, a sandwich plate, or a carbon fiber plate. The sandwich plate can be any one of a honeycomb sandwich plate, a foam sandwich plate, a wood sandwich plate, and an acrylic plate, which is low in cost and easy to obtain. The honeycomb sandwich plate can be an aluminum honeycomb sandwich plate, an aramid honeycomb sandwich plate, etc. The foam sandwich plate can be a polyvinyl chloride (PVC) foam sandwich plate, a polymethacrylimide (PMI) foam sandwich plate, etc. The wood sandwich plate can be basswood or other light wood.

[0141] As is well known to those skilled in the art, the sound quality of sound can be measured in terms of volume, frequency response range, tone, etc. The sound emitted by the sandwich plate has higher volume and wider frequency response with smaller fluctuations than the sound emitted by the aluminum plate. That is, by providing the reinforcing plate 250, the display device 10 can emit sound with better sound quality.

[0142] In some embodiments, referring to Figure 8 The reinforcing plate 250 can be divided into a plurality of sub-plates 251, and the plurality of sub-plates 251 are spaced apart from each other. The exciter 400 is connected to the first lamp plate 210a through the plurality of sub-plates 251. In this way, the weight of the reinforcing plate 250 can be further reduced, thereby reducing the mass that needs to be pushed by the exciter 400, reducing energy loss, and improving vibration transmission efficiency.

[0143] In some possible embodiments, in combination with Figure 7 , Figure 9 and Figure 10 , the first lamp plate 210a in the vibration area can be at least one, for example, the first lamp plate 210a can be two, three or more. For example Figure 9As shown, the first lamp plate 210a is two arranged side by side, and the reinforcing plate 250 can be arranged at the joint position of the two first lamp plates 210a, so that the exciter 400 can drive the two first lamp plates 210a to vibrate at the same time; for example Figure 10 As shown, the first lamp plate 210a is three arranged side by side, and the reinforcing plate 250 can be two, and the two reinforcing plates 250 are arranged at two joint positions defined by the three reinforcing plates 250, and the exciter 400 can be connected with the two reinforcing plates 250 at the same time to drive the three first lamp plates 210a to vibrate at the same time.

[0144] Optionally, when the number of first lamp plates 210a in the vibration area is multiple, the length of each first lamp plate 210a can be less than the length of the second lamp plate 210b, which helps to reduce the mass that needs to be pushed by the exciter 400, reduce energy loss, and improve vibration transmission efficiency.

[0145] <Optical film assembly 110>

[0146] Please continue to refer to Figure 4 As shown, the backlight assembly 200 further includes an optical film assembly 110, the display panel 100 is located on the light-emitting side of the optical film assembly 110, the lamp plate 210 is located on the light-entering side of the optical film assembly 110, and a sealed cavity M is formed between the optical film assembly 110 and the display panel 100. For example, the edge of the display panel 100 is sealingly connected with the edge of the optical film assembly 110 to form a sealed cavity between the optical film assembly 110 and the display panel 100.

[0147] According to the type of light emitted by the light source 240, the optical film assembly 110 can be of different types. For example, when the light source 240 emits white light, the optical film assembly 110 can include a reflective sheet, a light guide plate, a brightness enhancement film, etc. Among them, the reflective sheet is attached to the side of the lamp plate body 230 where the light source 240 is arranged.

[0148] When the light source 240 emits blue light, the optical film assembly 110 can include a diffusion film, which can ensure uniform light; the optical film assembly 110 can also include a fluorescent film and a brightness enhancement film. The diffusion film is arranged in front of the light source 240, and the user mixes the light of multiple light sources 240 uniformly, that is, converts the point light source 240 into a surface light source 240. The fluorescent film converts the light emitted by the light source 240 into white light, so that the color of the light emitted by the light source 240 is not limited, for example, the light source 240 can emit blue light or purple light. The brightness enhancement film is used to improve the brightness of the light. It can be understood that when the light source 240 emits white light, the optical film assembly 110 can also include a diffusion film, a fluorescent film and a brightness enhancement film. The present embodiment takes the optical film assembly 110 at least including a diffusion film as an example for description.

[0149] <Support transmission assembly>

[0150] The support transmission assembly is supported between the first lamp plate 210a and the optical film assembly 110. In some embodiments, the support transmission assembly includes a plurality of supports 300, which are arranged at intervals along the first lamp plate 210a, and one end of each support 300 is connected to the first lamp plate 210a and the other end is connected to the diffusion plate 111. In this way, the supports 300 can be used as a transmission medium for vibration, and the vibration on the side of the first lamp plate 210a can be transmitted to the diffusion plate 111, thereby improving the transmission efficiency of the vibration from the first lamp plate 210a to the display panel 100.

[0151] In addition, by providing the supports 300, the gap between the lamp plate body 230 and the diffusion plate 111 can be maintained within a predetermined range, and the light source 240 and the display panel 100 can be prevented from colliding with each other at a certain position to generate collision noise.

[0152] It can be understood that the material of the support 300 can be a silica gel material that is easy to guide light. The silica gel material has a small hardness, that is, the support 300 is one of a silica gel member or a rubber member.

[0153] In addition, it should be noted that the temperature inside the display device 10 changes when the display device 10 is working, and the materials such as silica gel and rubber will age with the change of temperature, which will reduce the buffering effect of the support 300, reduce the support strength, and reduce the vibration transmission efficiency. Therefore, in some embodiments, the support 300 can also have a composite structure to ensure that its vibration transmission performance is reliable. For example, the support 300 can be made of a material that is not sensitive to temperature deformation, for example, the support 300 is made of a hard material such as metal or plastic that has high strength.

[0154] In some embodiments, the support 300 can have a conical structure, for example, the support 300 can have a circular conical structure or a quadrangular prism conical structure, and the cross-sectional size of the support 300 can gradually decrease from one end of the lamp plate body 230 to one end of the display panel 100. Since the light beam emitted by the light source 240 has a certain divergence, the conical structure of the support 300 helps to avoid the light beam of the light source 240, thereby avoiding affecting the normal light emission of the lamp plate 210.

[0155] <Exciter 400>

[0156] Please continue to refer to Figure 4As shown, the exciter 400 is arranged on the side of the first lamp plate 210a away from the optical film assembly 110, so that the arrangement of the exciter 400 does not affect the display of the display device 10, and the exciter 400 can provide vibration with the sound emitted by the display panel 100. Specifically, the exciter 400 can transmit vibration through the first lamp plate 210a, the support transmission assembly, and the optical film assembly 110 in sequence to the display panel 100, and the optical film assembly 110 indirectly transmits the vibration to the display panel 100 through the cavity to drive the display panel 100 to vibrate. The display panel 100 emits sound waves through vibration to emit sound, so that the display panel 100 can be used for display and sound emission instead of a loudspeaker, the sound image position and the picture center position are approximately coincident, the sound and picture are integrated, and the user has a better audio-visual effect.

[0157] In some embodiments, please refer to Figure 11 As shown, the exciter 400 includes an actuator 410, a spring 420, and a shell 430. The vibration output end of the actuator 410 is connected with the first lamp plate 210a. One end of the spring 420 is connected with the actuator 410, and the other end of the spring 420 is connected with the shell 430. The spring 420 has good heat conduction performance, so that the spring 420 can act as a heat conduction member between the actuator 410 and the shell 430 to transmit heat generated by vibration of the actuator 410 to the outside for heat dissipation. In this way, in addition to the heat generated by the actuator 410 being dissipated through air, the heat can also be transmitted to the shell 430 through the spring 420 for heat dissipation, increasing the heat conduction path of the actuator 410 to facilitate reducing the temperature of the actuator 410, improving the heat dissipation efficiency, avoiding the heat being transmitted to the display panel 100 to cause local temperature rise to affect the image display quality, and improving the image display quality of the display device 10.

[0158] The display device 10 provided by some embodiments of the present application directly drives the first lamp plate 210a through the exciter 400, so that the first lamp plate 210a directly transmits vibration to the optical film assembly 110 through the support transmission assembly, and the optical film assembly 110 indirectly drives the display panel 100 to vibrate through the sealed cavity. In this way, the display panel 100 can be uniformly stressed in the full plane range while ensuring the transmission efficiency, the actual vibration area of the display panel 100 is increased, and thus the low-frequency sound performance can be realized by using a smaller amplitude (for example, 0.3 mm). In addition, the actuator 410 of the exciter 400 is prone to generate a large amount of heat due to reciprocating vibration. The elastic wave 420 is arranged to connect the housing 430 and the actuator 410 of the exciter 400, so that the heat generated by the vibration of the actuator 410 is transmitted to the housing 430 for heat dissipation. In this way, the heat generated by the actuator 410 can be dissipated not only through air but also through the elastic wave 420, which is conducive to reducing the temperature of the actuator 410 and avoiding the influence of the local temperature rise on the image display quality caused by the heat transmitted to the display panel 100, thereby improving the image display quality of the display device 10.

[0159] In some embodiments, referring to Figure 11 As shown in FIG. 13, the elastic wave 420 includes a wave-shaped body 4201, a first connecting portion 4202, and a second connecting portion 4203. The wave-shaped body 4201 is arranged in a plane parallel to the display panel 100. The wave-shaped body 4201 has a wave structure, one end of which is bent to form the first connecting portion 4202 connected with the actuator 410. The other end of the wave-shaped body 4201 is bent to form the second connecting portion 4203 connected with the housing 430. The second connecting portion 4203 can be directly connected with the housing 430, or indirectly connected with the housing 430 through other components. The first connecting portion 4202 and the second connecting portion 4203 are both in a sheet structure, which is conducive to increasing the connection area of the elastic wave 420 with the housing 430 and the actuator 410, thereby improving the stability of the connection and facilitating heat transfer.

[0160] In the embodiments of the present application, the exciter 400 is provided with the elastic wave 420 to transmit the heat generated by the vibration of the actuator 410 to the housing 430 for heat dissipation. In this way, the heat generated by the actuator 410 can be dissipated not only through air but also through the elastic wave 420, which is conducive to reducing the temperature of the actuator 410 and reducing the influence of the local temperature on the image display quality. In addition, the first connecting portion 4202 increases the connection area with the actuator 410, and the second connecting portion 4203 increases the connection area with the housing 430, thereby improving the heat dissipation effect.

[0161] The elastic wave 420 of the embodiment of the present application increases the heat conduction path of the actuator 410, the thermal conductivity of the elastic wave 420 is about 3-4 times of copper, the transverse thermal conductivity of the elastic wave 420 can reach 1000 W / m·K, the efficiency is obviously better than air cooling, the temperature of the actuator 410 can be reduced, the local temperature of the screen of the display device 10 can be reduced, the "hot" point of the screen can be avoided, the non-uniformity of the screen brightness and color can be reduced, and the maximum power and working reliability of the exciter 400 or the loudspeaker can be increased.

[0162] The thermal conductivity of the elastic wave 420 of the embodiment of the present application is several times of the general copper, aluminum and other metal materials, so that the heat of the actuator 410 can be mainly transmitted to the shell 430 through the elastic wave 420, the temperature of the vibration output end of the actuator 410 is reduced, and the influence of the local temperature on the image display quality of the display device 10 is reduced.

[0163] In some embodiments, the elastic wave 420 is bonded with the actuator 410 and the shell 430 respectively, for example, the elastic wave 420 is bonded with the actuator 410 and the shell 430 respectively by glue, and the connection mode is simple and stable.

[0164] In some embodiments, referring to Figures 12 to 14 , the elastic wave 420 includes a fiber layer 421 and a heat conduction layer which are stacked. The fiber layer 421 includes but is not limited to a mesh cloth, a glass fiber mesh cloth and the like, and is subjected to resin impregnation and curing treatment. The heat conduction layer 422 can be a graphene film, which can be prepared by using flake graphite as raw material, forming graphene oxide slurry through oxidation, and then coating into a film, sintering reduction, calendering and the like. Alternatively, the heat conduction layer 422 is formed by coating or spraying a heat conduction material on the fiber layer 421.

[0165] Hereinafter, the manufacturing process of the elastic wave 420 will be introduced by taking the heat conduction layer 422 as an example.

[0166] One possible manufacturing method of the elastic wave 420 includes: on the one hand, using flake graphite as raw material, performing oxidation and pulping process to form graphene oxide slurry; then coating a base film, and then performing sintering reduction and calendering process to form a graphene film; on the other hand, using a fiber mesh cloth as raw material, impregnating the fiber mesh cloth in resin to form a fiber film; finally, the graphene film and the fiber film are stacked and formed into a wave shape by embossing, and after curing, the elastic wave 420 with high thermal conductivity is formed.

[0167] In some embodiments, the elastic wave 420 is formed by stacking the fiber layer 421 and the heat-conductive layer 422, and the fiber layer 421 serves as a framework. The fiber layer 421 has certain elasticity, vibration damping, and ventilation properties, while the heat-conductive layer 422 has high thermal conductivity. In this way, the elastic wave 420 not only has elasticity, but also has high thermal conductivity, thereby facilitating the transfer of heat generated by the actuating member 410 to the housing 430, and reducing the transfer of heat generated by the actuating member 410 to the display panel 100.

[0168] In some embodiments, referring to Figure 12 and Figure 14 , the elastic wave 420 includes the fiber layer 421 and the heat-conductive layer 422 stacked together. For example, in Figure 12 and Figure 14 , the fiber layer 421 has two layers, and the heat-conductive layer 422 is located between the two layers of the fiber layer 421.

[0169] In other embodiments, referring to Figure 13 , the elastic wave 420 includes the fiber layer 421 and the heat-conductive layer 422 stacked together. The heat-conductive layer 422 has two layers, and the fiber layer 421 is located between the two layers of the heat-conductive layer 422.

[0170] In yet other embodiments, the elastic wave 420 includes a plurality of fiber layers 421 and a plurality of heat-conductive layers 422, which are alternately stacked together.

[0171] In the embodiments of the present application, the elastic wave 420 is provided with a plurality of fiber layers 421, thereby improving the structural strength of the elastic wave 420. The elastic wave 420 is also provided with a plurality of heat-conductive layers 422, thereby improving the thermal conductivity of the elastic wave 420.

[0172] In some embodiments, referring to Figure 15 , the heat-conductive layer 422 is in contact with the housing 430, thereby improving the heat transfer efficiency and further improving the heat dissipation efficiency of the actuating member 410. When the heat-conductive layer 422 is located on at least one surface of the elastic wave 420, the surface is directly in contact with the housing 430. When the heat-conductive layer 422 is located in the inner layer of the elastic wave 420, for example, when the heat-conductive layer 422 is located between the two layers of the fiber layer 421, the fiber layer 421 of the elastic wave 420 facing the housing 430 is provided with a notch, so that the heat-conductive layer 422 is arranged on the surface of the elastic wave 420, and further in contact with the housing 430.

[0173] In combination with Figure 15 , the second connecting portion 4203 of the elastic wave 420 is provided with a notch in the corresponding fiber layer 421, so that the heat-conductive layer 422 is arranged on the surface of the elastic wave 420, and the surface is in contact with the housing 430.

[0174] It can be understood that the heat-conducting layer 422 can be in direct contact with the shell 430, or the heat-conducting layer 422 is in indirect contact with the shell 430 through other components.

[0175] In some embodiments, the heat-conducting layer 422 has a plurality of heat dissipation holes penetrating through opposite sides of the heat-conducting layer 422 to increase the heat dissipation efficiency.

[0176] In some other embodiments, referring to Figures 16 to 18 , the elastic wave 420 includes the heat-conducting film 423 and the fiber layer 421 arranged in layers, and the heat-conducting film 423 is provided with a plurality of through holes 4231. The material and preparation method of the fiber layer 421 can be the same as those of the above embodiments, and then the heat-conducting film 423 is prepared to form an integrated elastic wave 420 through adhesion or hot melting process. The through holes 4231 provided on the heat-conducting film 423 can be circular holes, elliptical holes, polygonal holes, irregularly shaped holes, etc.; the plurality of through holes 4231 can be arranged in a matrix on the heat-conducting film 423, such as a rectangular matrix, a circular matrix, etc. The number, shape and arrangement of the through holes 4231 are not limited in the embodiments of the present application.

[0177] The thickness of the heat-conducting film 423 can be 100 μm to 1000 μm, for example, 100 μm to 200 μm, 200 μm to 350 μm, 350 μm to 500 μm, 500 μm to 600 μm, 600 μm to 750 μm, 750 μm to 850 μm, 850 μm to 1000 μm; for example, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, etc.

[0178] The elastic wave 420 of the embodiments of the present application improves the heat dissipation efficiency of the heat-conducting film 423 by arranging the fiber layer 421 as a framework, arranging the heat-conducting film 423 and providing a plurality of through holes 4231 on the heat-conducting film 423; and the heat-conducting film 423 can also have a certain flexibility.

[0179] In some examples, referring to Figure 18 , the heat-conducting film 423 with the through holes 4231 is provided with two layers, and the fiber layer 421 is arranged between the two layers of the heat-conducting film 423.

[0180] In some other examples, referring to Figure 16 and Figure 17 , the fiber layer 421 is provided with two layers, and the heat-conducting film 423 with the through holes 4231 is arranged between the two layers of the fiber layer 421.

[0181] In yet some examples, the heat-conductive film 423 and the fiber layer 421 are respectively provided with multiple layers, and the heat-conductive film 423 and the fiber layer 421 are arranged in an alternating stack.

[0182] The elastic wave 420 of the embodiment of the present application improves the structural strength of the elastic wave 420 by providing multiple fiber layers 421, and improves the heat-conducting performance of the elastic wave 420 by providing multiple heat-conductive films 423 with through holes 4231.

[0183] For the elastic wave 420 of the embodiment, the heat-conductive film 423 is in contact with the shell 430, which is conducive to improving the heat transfer efficiency and in turn improving the heat dissipation efficiency of the actuator 410.

[0184] Please refer back to Figure 11 As shown in the figure, the exciter 400 of the embodiment of the present application further includes a heat-conductive compression ring 440 configured to compress the elastic wave 420 against the shell 430. The heat-conductive compression ring 440 can be a metal piece, which is conducive to ensuring the heat transfer efficiency. The second connecting portion 4203 of the elastic wave 420 is compressed against the shell 430 by the heat-conductive compression ring 440, which is conducive to improving the stability and tightness of the connection between the elastic wave 420 and the shell 430, and facilitating heat transfer.

[0185] For example, the heat-conductive compression ring 440 can be bonded to the shell 430 and the elastic wave 420, and the connection method is simple and stable.

[0186] Continue to refer to Figure 11 Taking the exciter 400 as an example, the electromagnetic exciter 400 includes a magnetic assembly 450 and a voice coil, wherein the magnetic assembly 450 is configured to generate a magnetic field, and the voice coil vibrates along the axis direction of the voice coil in the magnetic field.

[0187] In some embodiments, the magnetic assembly 450 includes a magnetic conducting piece 451 and a magnetic piece 452, and a magnetic air gap N is formed between the magnetic conducting piece 451 and the magnetic piece 452. The magnetic conducting piece 451 is in the shape of a cylinder with an opening, and the magnetic piece 452 is arranged on the bottom surface inside the magnetic conducting piece 451. There is a gap between the inner wall surface of the magnetic conducting piece 451 and the magnetic piece 452, which becomes the magnetic air gap N. The magnetic assembly 450 is configured to provide a stable magnetic field in the magnetic air gap N.

[0188] One end of the voice coil is connected with the first lamp plate 210a, and a sheet-shaped connecting structure 411 can be further arranged between the voice coil and the first lamp plate 210a to increase the connecting area between the voice coil and the first lamp plate 210a and avoid mutual separation between the voice coil and the first lamp plate 210a. The other end of the voice coil is inserted into the magnetic air gap N, and the voice coil is fixed to the shell 430 through the spring wave 420. With the change of the magnetic field, the voice coil is forced to reciprocate along the axial direction. That is, when the exciter 400 is an electromagnetic exciter 400, the voice coil constitutes the actuator 410, and one end of the actuator 410 away from the vibration output end is located in the magnetic air gap N.

[0189] Therefore, under the action of the magnetic field, the electromagnetic force causes the voice coil to resonate at a high frequency, directly vibrating the first lamp plate 210a, and the reaction force of the electromagnetic force causes the exciter 400 with a large mass to resonate at a low frequency and vibrate the first lamp plate 210a through the connecting member. The shell 430 of the exciter 400 has no fixed support and vibrates with the vibration of the driven first lamp plate 210a, which is also the biggest difference between the exciter 400 and the support excitation mode of the OLED screen.

[0190] The magnetic conductive member 451 is fixedly connected with the shell 430, and the other end of the spring wave 420 is connected with the shell 430 through the magnetic conductive member 451. Specifically, the second connecting portion 4203 of the spring wave 420 is pressed on the magnetic conductive member 451 through the heat-conducting compression ring 440. For example, the second connecting portion 4203 and the magnetic conductive member 451, the heat-conducting compression ring 440 and the magnetic conductive member 451, and the heat-conducting compression ring 440 and the shell 430 are bonded, and the connection mode is simple and stable.

[0191] The exciter 400 of the embodiment of the present application realizes the connection between the spring wave 420 and the shell 430 through the magnetic conductive member 451, reduces the width size of the exciter 400, and since the axial size of the actuator 410 is large, the heat-conducting compression ring 440, the magnetic conductive member 451 and the shell 430 are stacked and pressed, which does not affect the overall thickness of the exciter 400. The connection mode of the spring wave 420 is set in this way, which not only ensures the stability of the connection, but also facilitates the compact structure of the exciter 400.

[0192] Specifically, the magnetic conductive member 451 of the embodiment of the present application includes a U-shaped body and a third connecting portion, and the two ends of the opening of the U-shaped body are bent and extended away from each other to form the third connecting portion, and the third connecting portion is connected with the shell 430.

[0193] Please continue to refer to Figure 11 The part of the magnetic conductive member 451 in contact with the spring wave 420 is provided with a ventilation hole 4511 to improve the heat dissipation efficiency of the magnetic conductive member 451 and improve the heat dissipation amount of the actuator 410 through the spring wave 420. The ventilation hole 4511 can be a circular hole, and the shape, number and arrangement mode of the ventilation hole 4511 are not limited in the embodiment of the present application.

[0194] In some possible embodiments, the part of the shell 430 in contact with the magnetic conductor 451 is provided with a vent hole 431, which can be opposite the vent hole 4511, to further improve the heat dissipation efficiency. The vent hole 431 can be a circular hole, and the embodiments of the present application do not limit the shape, number, and arrangement of the vent hole 431.

[0195] In some embodiments, as shown in Figure 4 The exciter 400 can be fixed to the back plate 500 through the elastic pad 460 and the fixing pin, so that the elastic pad 460 can play a role in buffering vibration, preventing the vibration of the exciter 400 from causing the back plate 500 to vibrate and produce abnormal noise.

[0196] The back plate 500 includes a back plate body and a first side plate. The back plate body is configured to support the lamp plate 210 and the display panel 100, and is provided with an opening. The first side plate extends along the edge of the back plate body and protrudes the back plate body towards one side of the display panel 100, that is, the first side plate protrudes the front side of the back plate body, so that the first side plate is arranged outside the display panel 100 and the lamp plate 210 in the circumferential direction.

[0197] The display device 10 provided by the embodiments of the present application further includes a first adhesive, which can be double-sided tape, foam, or the like. The first adhesive is configured to connect the back plate and the lamp plate 210. The first adhesive can be provided in multiple pieces to ensure that the distance between the lamp plate 210 and the back plate 500 at different positions is within a preset range, that is, the vibration amplitude of the lamp plate 210 at different positions is relatively uniform, avoiding noise during vibration of the lamp plate 210.

[0198] In addition, the first adhesive can limit the lamp plate 210, avoiding deformation of the lamp plate 210 after the display device 10 is assembled, which affects the vibration sound.

[0199] In some embodiments, the first adhesive is arranged between two adjacent lamp plates 210, and the first adhesive forms a connecting piece to connect the two adjacent lamp plates 210. In this way, the first adhesive can connect the lamp plate 210 and the back plate 500 while connecting the multiple lamp plates 210, which is conducive to simplifying the assembly process of the display device 10 and improving the production efficiency.

[0200] <back shell>

[0201] In some embodiments, the display device 10 further comprises a rear shell (not shown in the figure), which is located on the side of the back plate 500 away from the display panel 100, i.e. the rear shell is arranged on the rear side of the back plate 500, and the controller, electrical connection lines and the like of the display device 10 can be arranged between the back plate 500 and the rear shell to simplify the appearance of the display device 10. The material of the rear shell can be plastic, metal or the like.

[0202] In other embodiments, the end of the shell 430 is provided with a damping block, which can be double-sided tape, foam or the like, and the damping block can be connected to the side of the lamp panel 210 facing the back plate 500. In this way, the shell 430 and the lamp panel 210 have a large relative movement range, which is beneficial to realize the inertial driving of the actuator 400 to drive the display panel 100 to vibrate.

[0203] In some embodiments, there are problems in the vibration transmission process of the actuator 400. The air gap thickness between the display panel 100 and the lamp panel 210 changes greatly due to material tolerances, assembly process tolerances and self-gravity, etc., which leads to inconsistent vibration transmission efficiency, and the adhesion of the display panel 100 and the lamp panel 210 leads to vibration noise and abrasion.

[0204] To avoid the above problems, some embodiments of the present application increase a support 300 between the display panel 100 and the lamp panel 210. The support 300 has the following characteristics: one side is in contact with the display panel 100, and the other side is in contact with the lamp panel 210; one side or both sides are connected to the contact position by mechanical structure or pasting, etc. The support 300 can include a buffer part, which can be a high-resilience material or a combination of materials with resilience function, such as silicone or the like. The support 300 can ensure the stability of the air gap size between the display panel 100 and the lamp panel 210, avoid abnormal collision noise between the display panel 100 and the lamp panel 210, and the solid support 300 improves the transmission efficiency of the vibration from the lamp panel 210 to the display panel 100.

[0205] By arranging the support 300 between the lamp panel 210 and the optical film assembly 110, the optical film assembly 110 and the lamp panel 210 can be connected as a whole, i.e. they can be equivalent to a single-layer screen, which avoids the relative movement between the optical film assembly 110 and the lamp panel 210 due to the excessive gap in the cavity M.

[0206] And since the optical film assembly 110 converts and homogenizes the light generated by the light panel 210 light source, even if the support 300 is arranged on the light-emitting side of the light panel 210, no shadow will be generated on the display panel 100, resulting in uneven brightness of the display panel 100. In this way, the shape and size of the support 300, the contact area between the support 300 and the optical film assembly 110, etc. can not be limited. The cross section (the cross section perpendicular to the display device) shape of the support 300 can be rectangular, cylindrical, of course, the cross section shape of the support 300 can also be conical, trapezoidal, dumbbell-shaped or other shapes, etc.

[0207] In the description of the present specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0208] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0209] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display device, characterized by comprising: The display panel is configured to display an image. The backlight assembly includes a vibration region in a self-plane direction, and includes: An optical film assembly, the display panel is located on the light-out side of the optical film assembly, a cavity is formed between the optical film assembly and the display panel, A lamp plate, the lamp plate is located on the light-in side of the optical film assembly, the lamp plate includes a first lamp plate and a second lamp plate, the first lamp plate and the second lamp plate are arranged side by side along the side length direction of the display panel, the first lamp plate is arranged in the vibration region, and the second lamp plate is arranged outside the vibration region; A support transmission assembly is supported between the first lamp plate and the optical film assembly; An exciter is arranged on the side of the first lamp plate away from the optical film assembly, the exciter includes an actuator, an elastic wave, and a shell, the vibration output end of the actuator is connected with the first lamp plate, one end of the elastic wave is connected with the actuator, and the other end of the elastic wave is connected with the shell. The optical film assembly includes a diffusion plate, and the support transmission assembly includes a plurality of support pieces, the plurality of support pieces are arranged at intervals along the plate surface of the first lamp plate, one end of the support piece is connected with the first lamp plate, and the other end is connected with the diffusion plate.

2. The display device of claim 1, wherein, The elastic wave includes a fiber layer and a heat-conducting layer arranged in layers, and the heat-conducting layer is in contact with the shell.

3. The display device of claim 2, wherein, The elastic wave includes two fiber layers and one heat-conducting layer, and the heat-conducting layer is arranged between the two fiber layers.

4. The display device of claim 3, wherein, Alternatively, the elastic wave includes one fiber layer and two heat-conducting layers, and the fiber layer is located between the two heat-conducting layers. Alternatively, the elastic wave includes at least two fiber layers and at least two heat-conducting layers, and the at least two fiber layers and the at least two heat-conducting layers are arranged in layers alternately. The heat-conducting layer has a plurality of heat dissipation holes penetrating through the opposite two sides of the heat-conducting layer. The elastic wave includes a heat-conducting film and a fiber layer arranged in layers, and the heat-conducting film is provided with a plurality of through holes.

5. The display device of claim 4, wherein, The exciter further includes a heat-conducting compression ring configured to compress the elastic wave on the shell.

6. The display device of claim 2, wherein, The exciter further includes a magnetic assembly including a magnetic conducting piece and a magnetic piece, a magnetic air gap is formed between the magnetic conducting piece and the magnetic piece, and one end of the actuator away from the vibration output end is located in the magnetic air gap; one end of the elastic wave is connected with the shell through the magnetic conducting piece.

7. The display device of any of claims 1-5, wherein, Further comprising:

8. The display device of any of claims 1-5, wherein, A back plate is arranged on the side of the lamp plate away from the display panel, and the second lamp plate is fixedly connected with the back plate; 9. The display device of any of claims 1-5, wherein, The first lamp plate is configured to move relative to the second lamp plate under the pushing of the exciter. The first lamp plate and the back plate are connected through a first elastic connecting piece; Alternatively, the first lamp plate and the adjacent second lamp plate are connected through a second elastic connecting piece.

10. The display device of claim 9, wherein, ​ ​

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