Display device

Abstract

The invention provides a display device, relates to the technical field of display, and is used for solving the technical 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 panels are located on the light incident side of the optical film assembly and comprise the first lamp panel and the second lamp panel, 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. According to the invention, the low-frequency sound production performance of the display panel can be realized by using relatively small amplitude.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display device. Background Art

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

[0003] In related technologies, a display device includes a display panel, a light board, a back panel, an exciter, and a back shell. The light board is arranged on the side of the display surface away from the display panel. The exciter is arranged on the side of the light board away from the display panel and is bonded to the back panel. The exciter drives the light board to vibrate, thereby driving the display panel to vibrate and make sound. The back shell is connected to the back panel to provide support for the back panel and other structures.

[0004] However, in related technologies, a large amplitude is required to achieve a higher sound pressure, but the large amplitude affects the reliability and display performance of the display panel, resulting in the display device only being able to achieve small-amplitude mid- and high-frequency sound above 300Hz, and the low-frequency sound performance is poor. Summary of the Invention

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

[0006] In order to achieve the above objectives, 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 for displaying an image; a backlight assembly, the backlight assembly including a vibration area in its own plane direction, the backlight assembly including a lamp board and an optical film assembly, the lamp board being located on the light incident side of the optical film assembly, the display panel being located on the light emitting side of the optical film assembly, a cavity being formed between the optical film assembly and the display panel, the lamp board including a first lamp board and a second lamp board, the first lamp board being arranged in the vibration area, and the second lamp board being arranged outside the vibration area; a support and transmission assembly, supported between the first lamp board and the optical film assembly; an exciter, arranged on the side of the first lamp board away from the optical film assembly, the exciter including an actuator, a spring and a shell, the vibration output end of the actuator being connected to the first lamp board, one end of the spring being connected to the actuator, and the other end of the spring being connected to the shell.

[0008] The display device provided by some embodiments of the present application directly drives the first lamp board through the exciter, so that the first lamp board transmits the vibration directly to the optical film assembly through the support transmission assembly, and the optical film assembly then 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 entire plane range, thereby increasing the actual vibration area of the display panel, so that low-frequency sound performance can be achieved with a smaller amplitude (for example, 0.3mm); in addition, the actuator of the exciter is prone to generate a large amount of heat due to the reciprocating vibration. By setting an elastic wave to connect the housing of the exciter and the actuator, the heat generated by the vibration of the actuator is transferred to the housing for dissipation. In this way, in addition to dissipating the heat generated by the actuator through the air, it can also be dissipated through the elastic wave, which is beneficial to reducing the temperature of the actuator, avoiding the influence of local temperature increase caused by heat transfer to the display panel on the image display quality, and improving the image display quality of the display device.

[0009] In some embodiments, the optical film assembly includes a diffuser plate, the support transmission assembly includes a plurality of support members, the plurality of support members are arranged at intervals along the surface of the first light board, and one end of the support member is connected to the first light board, and the other end is connected to the diffuser plate.

[0010] In some embodiments, the damper includes a fiber layer and a heat-conducting layer stacked together, and the heat-conducting layer is in contact with the housing.

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

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

[0013] Alternatively, the elastic wave comprises one 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 layers of the fiber layers and at least two layers of the heat-conducting layers, and the at least two layers of the fiber layers and the at least two layers of the heat-conducting layers are alternately stacked in sequence.

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

[0016] In some embodiments, the damper includes a stacked heat-conducting film and a fiber layer, and the heat-conducting film is provided with a plurality of through holes.

[0017] In some embodiments, the actuator further includes a heat-conducting pressure ring configured to press the elastic wave against the housing.

[0018] In some embodiments, the exciter further includes a magnetic component, the magnetic component including a magnetic conductive part and a magnetic part, a magnetic air gap is formed between the magnetic conductive part and the magnetic part, and an end of the actuator away from its vibration output end is located in the magnetic air gap; one end of the elastic wave is connected to the housing through the magnetic conductive part.

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

[0020] In some embodiments, the first light panel is configured to move relative to the second light panel under the push of an actuator.

[0021] In some embodiments, the first light panel is connected to the back panel via a first elastic connector;

[0022] Alternatively, the first light board is connected to the adjacent second light board via a second elastic connecting member.

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

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

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

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

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

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

[0029] Figure 5 This is a schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0030] Figure 6 This is another schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0031] Figure 7 This is another schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0032] Figure 8 This is another schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0033] Figure 9 This is another schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0034] Figure 10 This is another schematic diagram of the coordination between the first light board and the second light board in some embodiments of the present application;

[0035] Figure 11 A schematic cross-sectional view of an actuator in some embodiments of the present application;

[0036] Figure 12 A schematic cross-sectional view of a spring in some embodiments of the present application;

[0037] Figure 13 A schematic diagram of a structure of a spring in some embodiments of the present application;

[0038] Figure 14 This is another structural diagram of the damper in some embodiments of the present application;

[0039] Figure 15 This is another cross-sectional schematic diagram of a damper in some embodiments of the present application;

[0040] Figure 16 This is another cross-sectional diagram of a spring wave in some embodiments of the present application;

[0041] Figure 17 This is another structural diagram of the elastic wave in some embodiments of the present application;

[0042] Figure 18 This is another structural diagram of the damper in some embodiments of the present application.

[0043] Reference numerals:

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

[0045] 900-control device; 901-tuner-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-diffuser plate;

[0049] 200-backlight assembly; 210-light board; 210a-first light board; 210b-second light board;

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

[0051] 230-light board body; 240-light source; 250-reinforcement board; 251-sub-board;

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

[0053] 400-exciter; 410-actuator; 411-sheet connection structure; 420-spring;

[0054] 4201-corrugated 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-vent hole;

[0056] 440-thermal conductive pressure ring; 450-magnetic component; 451-magnetic conductive part; 4511-ventilation hole; 452-magnetic part; 460-elastic pad; M-cavity; N-magnetic air gap. DETAILED DESCRIPTION

[0057] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0058] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0059] In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0060] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0063] In related art, a display device includes a display panel, a light panel, a back panel, an exciter, and a rear housing. The light panel is disposed on the side of the display surface facing away from the display panel, and the exciter is disposed on the side of the light panel facing away from the display panel and bonded to the back panel. The exciter drives the light panel to vibrate, thereby driving the display panel to vibrate and produce sound. The rear housing is connected to the back panel to provide support for the back panel and other structures. However, when the exciter is used to directly drive the display panel to produce sound, since the exciter is disposed at a certain point on the light panel, the display panel produces the maximum amplitude at the exciter position, and the amplitude accumulation away from the exciter position is reduced, resulting in a smaller actual vibration area. A large amplitude is required to achieve a higher sound pressure, but a large amplitude affects the reliability and display performance of the display panel, resulting in the display device being able to only produce small-amplitude mid- and high-frequency sounds above 300Hz, and having poor low-frequency sound performance.

[0064] In view of this, some embodiments of the present application provide a display device, which directly drives the first lamp board through an exciter, so that the first lamp board transmits the vibration directly to the optical film assembly through the support transmission assembly, and the optical film assembly then 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 entire plane range, thereby increasing the actual vibration area of the display panel, so that low-frequency sound performance can be achieved with a smaller amplitude (for example, 0.3mm); in addition, the actuator of the exciter is prone to generate a large amount of heat due to the reciprocating vibration. By setting a spring wave to connect the housing of the exciter and the actuator, the heat generated by the vibration of the actuator is transferred to the housing for heat dissipation. In this way, in addition to dissipating the heat generated by the actuator through the air, it can also be dissipated through the spring wave, which is beneficial to reducing the temperature of the actuator, avoiding the influence of local temperature increase caused by heat transfer to the display panel on the image display quality, and improving the image display quality of the display device.

[0065] 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0066] The display device provided in some embodiments of the present application may have various implementation forms. For example, the display device may be a television, a smart TV, 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.

[0067] Figure 1 This is a schematic diagram of an operation scenario between a display device and a control device in some embodiments of the present application. Figure 1 As shown, the user can operate the display device 10 through the smart device 20 or the control apparatus 900 .

[0068] In some embodiments, the control device 900 may be a remote controller. Communication between the remote controller and the display device may include infrared protocol communication, Bluetooth protocol communication, or other short-range communication methods, and the display device 10 may be controlled wirelessly or wired. The user may control the display device 10 by inputting user commands through buttons on the remote controller, voice input, control panel input, and the like.

[0069] In some embodiments, a smart device 20 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may also be used to control the display device 10. For example, the display device 10 may be controlled using an application running on the smart device.

[0070] In some embodiments, the display device may not use the aforementioned smart device or control device to receive instructions, but may receive user control through touch or gestures.

[0071] In some embodiments, the display device 10 can also be controlled in a manner other than the control device 900 and the smart device 20. For example, the display device 10 can directly receive the user's voice command control through a module for obtaining voice commands configured inside the display device, or it can receive the user's voice command control through a voice control device set outside the device.

[0072] In some embodiments, the display device 10 also communicates data with the server 30. The display device 10 may be connected to a local area network (LAN), a wireless local area network (WLAN), or other networks. The server 30 may provide various content and interactions to the display device 10. The server 30 may be a single cluster or multiple clusters, and may include one or more types of servers.

[0073] Figure 2 This is a block diagram of a display device configuration shown in some embodiments of the present application. Figure 2 As shown, the display device 10 includes a tuner-demodulator 901;

[0074] In some embodiments, the display device 10 includes a communicator 902;

[0075] In some embodiments, the display device 10 includes a detector 903;

[0076] In some embodiments, the display apparatus 10 includes an external device interface 904;

[0077] In some embodiments, the display device 10 includes a controller 905;

[0078] In some embodiments, display device 10 includes a display 906;

[0079] In some embodiments, the display device 10 includes an audio output interface 907;

[0080] In some embodiments, the display device 10 includes a memory 908;

[0081] In some embodiments, the display device 10 includes a power supply 909;

[0082] In some embodiments, the display device 10 includes at least one of the user interfaces 910 .

[0083] In some embodiments, the controller includes a processor;

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

[0085] In some embodiments, the controller includes an audio processor;

[0086] In some embodiments, the controller includes a graphics processor;

[0087] In some embodiments, the controller includes RAM;

[0088] In some embodiments, the controller includes a ROM;

[0089] In some embodiments, the controller includes first to nth interfaces for input / output signals.

[0090] In some embodiments, the display 906 includes a display screen component configured to present a picture, and a driving component for driving the image display, which is used to receive an image signal output from a controller, and to display video content, image content, and a menu control interface component and a user control UI interface.

[0091] In some embodiments, the display 906 may be a liquid crystal display, an OLED display, a projection display, or a projection device and a projection screen.

[0092] In some embodiments, the communicator 902 is a component configured to communicate with an external device or server using various communication protocols. For example, the communicator may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chip or a near-field communication protocol chip, as well as an infrared receiver. The display device 10 can establish transmission and reception of control signals and data signals with the control device 900 or the server 30 via the communicator 902.

[0093] In some embodiments, the user interface 910 may be configured to receive a control signal from the control device 900 (eg, an infrared remote controller, etc.).

[0094] In some embodiments, the detector 903 is configured to collect signals from the external environment or external interactions. For example, the detector 903 may include a light receiver, such as a sensor for collecting ambient light intensity; or an image collector, such as a camera, for collecting external environmental scenes, user attributes, or user interaction gestures; or a sound collector, such as a microphone, for receiving external sounds.

[0095] In some embodiments, the external device interface 904 may include, but is not limited to, any one or more of the following: 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. It may also be a composite input / output interface formed by multiple of the above interfaces.

[0096] In some embodiments, the tuner-demodulator 901 receives broadcast television signals via wired or wireless reception, and demodulates audio and video signals, such as EPG data signals, from a plurality of wireless or wired broadcast television signals.

[0097] In some embodiments, the controller 905 and the tuner / demodulator 901 may be located in different separate devices, that is, the tuner / demodulator 901 may also be located in an external device of the main device where the controller 905 is located, such as an external set-top box.

[0098] The controller 905 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 905 controls the overall operation of the display device 10. For example, in response to receiving a user command to select a UI object to be displayed on the display 906, the controller 905 can perform operations related to the object selected by the user command.

[0099] 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), RAM Random Access Memory (RAM), ROM (Read-Only Memory, ROM), a first interface to an nth interface for input / output, a communication bus (Bus), etc.

[0100] The user may 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 may input a user command through a specific voice or gesture, and the user input interface may recognize the voice or gesture through a sensor to receive the user input command.

[0101] A user interface is the medium for interaction and information exchange between an application or operating system and the user. It converts information between its internal form and a user-friendly format. A common user interface is the graphical user interface (GUI), which refers to a graphical user interface related to computer operations. It can be an icon, window, control, or other interface element displayed on an electronic device's display. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0102] <Composition of display device>

[0103] Please refer to Figure 3 As shown, some embodiments of the present application provide a display device 10, which may be a liquid crystal display device 10. The display device 10 includes a display panel 100;

[0104] In some embodiments, the display device 10 includes a backlight assembly 200;

[0105] In some embodiments, the display device 10 includes a support transfer assembly;

[0106] In some embodiments, the display device 10 includes an actuator 400;

[0107] In some embodiments, the display device 10 includes a back plate 500 .

[0108] In some embodiments, the display 906 includes a display panel 100 and a backlight assembly 200;

[0109] Among them, the display panel 100 is used to display images, and the backlight assembly 200 can be a direct-type backlight assembly. In this case, the backlight assembly 200 includes a lamp board 210 and an optical film assembly 110. The lamp board 210 is located on the light incident side of the optical film assembly 110, and the display panel 100 is located on the light emitting side of the optical film assembly 110, so as to provide backlight for the display panel 100 through the light source of the lamp board 210. A cavity M is formed between the display panel 100 and the optical film assembly 110, and the actuator 400 is arranged on the lamp board 210 away from the optical film assembly 110. On one side of 10, the support transmission assembly is supported between the lamp board 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, and the exciter 400 is used to drive the lamp board 210 to vibrate. When the lamp board 210 vibrates, the gas in the cavity M is compressed, and the vibration is transmitted to the display panel through the cavity M to drive the display panel 100 to vibrate. The display panel 100 makes sound through the sound waves emitted by the vibration, so that the display panel 100 can be used for both display and sound replacement of the speaker.

[0110] It should be noted that the cavity M can be a sealed cavity or a non-sealed cavity, and there is no limitation here as long as the vibration can be transmitted to the display panel through the cavity.

[0111] Among them, the gap size of the cavity M can be determined according to the light source of the lamp board 210. For example, the gap size is related to the size of the light source, and the light source of the sub-millimeter light emitting diode (such as Mini-LED) type has a relatively compact size. Therefore, the cavity M between the lamp board 210 and the liquid crystal display panel will have a smaller gap, 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 described as a sub-millimeter light emitting diode (Mini-LED).

[0112] For example, the gap of the cavity M can be 0.3 mm to 10 mm, with the maximum gap of the cavity M being 10 mm. Alternatively, the gap of the cavity M can be 0.3 mm or 1 mm. For example, when the gap of the cavity M is 1 mm, the thickness of the cavity M is relatively small, which can improve the transmission efficiency of the vibration force output by the exciter. Alternatively, when the gap of the cavity M is 0.3 mm, the distance between the exciter 400 and the display panel 100 is closer, resulting in stronger vibration and better sound effects. When the gap of the cavity M is 10 mm, the thickness of the cavity M is relatively large, which can prevent 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. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0113] Compared to display devices using OLED light sources, because OLED displays are self-luminous and inherently flexible, placing an exciter on the back of the OLED display can cause the OLED display to elastically deform and emit sound under the excitation vibration of the exciter. However, in liquid crystal display devices, since they have a backlight module, the exciter 400 cannot be placed directly on the back of the display panel 100. Furthermore, the lamp board 210 in the backlight assembly 200 is relatively rigid, making it difficult to couple and transmit its own vibrations to the display panel 100, resulting in low vibration force transmission efficiency. Therefore, a support member can be provided between the display panel 100 and the lamp board 210 in a Mini-LED display device or other liquid crystal display device. The support member can be used as a vibration transmission medium to transmit the vibration of the lamp board 210 to the display panel 100, thereby improving the efficiency of vibration transmission from the lamp board 210 to the display panel 100. Furthermore, the support member can maintain the gap between the cavity M between the lamp board and the display panel within a preset range, preventing the light source and display panel 100 from contacting each other at certain locations, causing collision noise and abrasion.

[0114] The following will take the light source of the backlight assembly 200 as a sub-millimeter light emitting diode (Mini-LED) as an example, and describe the structures of various parts of the display device 10 in sequence with reference to the accompanying drawings.

[0115] <Display Panel 100>

[0116] 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. The circuit board is used to drive and display the entire display panel 100.

[0117] The display panel 100 is the main component of the display device 10 and primarily includes a liquid crystal display panel 100, a color filter (CF) substrate for the liquid crystal display panel 100, a thin film transistor (TFT) substrate (also known as an array substrate), and a liquid crystal (LC) layer located between the color filter substrate and the array substrate. The TFT substrate is provided with data lines and scan lines. The powering of these data and scan lines controls the orientation of the liquid crystal molecules, directing light from the light source 240 through the color filter substrate to produce a preset color image.

[0118] <border>

[0119] The frame can be set around the periphery of the display panel 100, and the shape of the frame matches the shape of the display panel 100. For example, if the display panel 100 is square, 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 serve as a decorative strip.

[0120] In some embodiments, the frame may also include a top side, a left side, a right side, and a ground side, wherein the correspondence and connection relationship between the top side, the left side, the right side, and the ground side of the frame may be consistent with the correspondence and connection relationship between the top side, the left side, the right side, and the ground side of the display panel 100, and will not be repeated here.

[0121] <Backlight Assembly 200>

[0122] 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 also includes a backlight assembly 200. The backlight assembly 200 includes a lamp board 210. The lamp board 210 is arranged on a side away from the display surface of the display panel 100. The lamp board 210 is used to generate light. The lamp board 210 is configured to provide backlight to the display panel 100.

[0123] It can be understood that the light board 210 is used to provide sufficient brightness and evenly distributed backlight for the display panel 100. The display panel 100 can modulate the backlight as needed to display different images.

[0124] In some embodiments, the light board 210 may include a light board body 230 and a light source 240. The light board body 230 may be an aluminum plate, a printed circuit board (PCB), etc. The light source 240 may be a light-emitting diode (LED), a submillimeter light-emitting diode (Mini-LED), or a micro-light-emitting diode (Micro-LED).

[0125] There can be multiple light sources 240 , and the multiple light sources 240 are arranged on a side of the light board body 230 facing the display panel 100 and are arranged at intervals, so that the light sources 240 provide backlight for the display panel 100 .

[0126] The light source 240 includes but is not limited to lamp beads, and multiple light sources 240 can be fixed on the light board body 230 by means of snap connection, thread connection, etc.

[0127] In some embodiments, the backlight assembly 200 includes a vibration area and a vibration suppression area (i.e., an area outside the vibration area) in its own planar direction. For example, the vibration area can be located in the middle of the backlight assembly 200, and the vibration suppression area can surround the vibration area; wherein, the lamp board 210 includes a first lamp board 210a and a second lamp board 210b, the first lamp board 210a is arranged in the vibration area, and the second lamp board 210b is arranged in the vibration suppression area, so that the exciter 400 can be arranged on the side of the first lamp board 210a away from the display panel 100, and the exciter 400 is used to drive the first lamp board 210a to vibrate, and the support transmission component is supported between the first lamp board 210a and the optical film assembly 110, so that the support transmission component can transmit the vibration from one side of the first lamp board 210a to the optical film assembly 110, and 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 and make sound.

[0128] Among them, the first light board 210a and the second light board 210b can be arranged in sequence in a ring shape, for example, the second light board 210b is wrapped around the outer circle of the first light board 210a; or, the first light board 210a and the second light board 210b can be arranged side by side. For example, the first light board 210a and the second light board 210b are arranged side by side along the side length direction of the display panel 100, for example, the first light board 210a and the second light board 210b are arranged side by side along the length direction and / or width direction of the display panel 100, so as to improve the space utilization while ensuring the function of the light board.

[0129] It can be understood that the exciter 400 drives the first lamp board 210a in the vibration area to vibrate, and transmits the vibration to the display panel 100 through the optical film assembly 110 and the cavity M in sequence through the support transmission assembly, while the second lamp board 210b in the vibration suppression area is not used to transmit vibration. In this way, the problem of abnormal noise generated by the display device 10 due to the large vibration area of the lamp board 210 can be avoided.

[0130] It should be emphasized that the first lamp board 210a and the optical film assembly 110 are connected through the support transmission assembly, and there is a cavity M between the optical film assembly 110 and the display panel 100. Therefore, the exciter 400 drives the first lamp board 210a to vibrate, so as to transmit the vibration to the optical film assembly 110 through the support transmission assembly, which is a direct drive and can ensure the transmission efficiency of the vibration; and 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 connected through the cavity M. The hysteretic air gap transmission is an indirect drive, and the area of the optical film assembly 110 covers the area of the display panel 100. In this way, the display panel 100 is indirectly driven by the optical film assembly 110, so that the display panel 100 can be subjected to uniform force in the entire plane range, thereby increasing the actual vibration area of the display panel 100. In this way, while ensuring the reliability and display performance of the display panel 100, the display panel 100 can achieve low-frequency sound performance with a smaller amplitude (for example, 0.3 mm), thereby solving the shortcoming of the display panel 100 in the related art that the display panel 100 cannot be driven with a large amplitude.

[0131] In the examples of this application, please refer to Figure 5 As shown, the exciter 400 drives the first lamp board 210a to move relative to the second lamp board 210b. For example, when the exciter 400 drives the first lamp board 210a to vibrate, the first lamp board 210a moves independently of the second lamp board 210b and generates a displacement relative to the second lamp board 210b. The first lamp board 210a and the second lamp board 210b have a certain displacement difference in the thickness direction of the display device 10. In this way, the second lamp board 210b can be prevented from generating resistance to the first lamp board 210a, reducing the resistance that the exciter 400 needs to overcome, reducing vibration loss, and further ensuring the vibration transmission efficiency.

[0132] Taking into account that the exciter 400, the first lamp board 210a and the optical film assembly 110 are directly driven and do not need to rely on the viscosity of the gas in the sealed air gap to transmit the driving force, therefore, in this embodiment, the first lamp board 210a and the second lamp board 210b around it can be a non-sealed structure. In this way, on the one hand, the reaction force of the gas between the first lamp board 210a and the optical film assembly 110 on the first lamp board 210a can be reduced, so that the pushing resistance is reduced, which is conducive to improving the vibration transmission efficiency. On the other hand, the amount of the adhesive structure 212 used for installing the first lamp board 210a and the second lamp board 210b can be reduced, thereby reducing costs.

[0133] In some embodiments, please refer to Figure 1 As shown, the first lamp board 210a is connected to the backboard 500 via a first elastic connector 211. In this way, the backboard 500 can provide vibration support for the first lamp board 210a.

[0134] For example, in Figure 1 In the embodiment, the periphery of the first light board 210a can be adhered to the back panel 500 by elastic double-sided tape, and in order to prevent the display panel 100 from being locally too bright, when the first light board 210a is adhered to the back panel 500 by elastic double-sided tape, it is necessary to ensure that the surface of the side of the first light board 210a facing the display panel 100 after adhesion is flush with the surface of the side of the second light board 210b facing the display panel 100, so that the image brightness of the display panel 100 is uniform.

[0135] Alternatively, a plurality of guide posts (not shown) may be provided on the back panel 500. For example, the guide posts may be mortise posts or other structures, and there may be four guide posts. The four corners of the first light board 210a are respectively provided with guide holes adapted to the guide posts. Each guide post is passed through the corresponding guide hole. A first elastic connector 211 such as a spring is also sleeved on the outer side of the guide post. The two ends of the first elastic connector 211 are respectively connected to the back panel 500 and the first light board 210a. Moreover, when the first light board 210a is in the initial vibration position, the surface of one side of the first light board 210a facing the display panel 100 is flush with the surface of the second light board 210b facing the display panel 100, thereby making the image brightness of the display panel 100 uniform.

[0136] refer to Figure 6In other alternative embodiments, since the second lamp board 210b is fixed, for example, the second lamp board 210b is fixed to the back panel 500, the first lamp board 210a and the second lamp board 210b can also be connected by a second elastic connecting member 213, and the second elastic connecting member 213 is, for example, an elastic double-sided tape, an elastic pad, an elastic column, etc. For example, the periphery of the first lamp board 210a is adhered to the back panel 500 by the elastic double-sided tape, and it is necessary to ensure that the side surface of the first lamp board 210a facing the display panel 100 after adhesion is flush with the side surface of the second lamp board 210b facing the display panel 100, and the second lamp board 210b and the first lamp board 210a are elastically connected by the second elastic connecting member 213, so that the second elastic connecting member 213 can limit the movement of the first lamp board 210a The moving distance is adjusted to avoid excessive vibration distance that affects the uniformity of the image brightness of the display panel 100; in addition, the second elastic connector 213 can also be used to reduce the accuracy of the relative position between the first lamp board 210a and the second lamp board 210b. That is to say, when the second elastic connector 213 is not provided between the first lamp board 210a and the second lamp board 210b, the position between the first lamp board 210a and the second lamp board 210b requires higher accuracy. If the accuracy is low, there may be hard contact between the first lamp board 210a and the second lamp board 210b and interference with each other or the distance between the two may be too large. Therefore, in the embodiment of the present application, the second elastic connector 213 can reduce the position accuracy between the first lamp board 210a and the second lamp board 210b, and the image brightness of the display panel 100 can be made uniform.

[0137] In addition to the aforementioned elastic connections between the first lamp panel 210a and the back panel 500, and between the first lamp panel 210a and the second lamp panel 210b, in this embodiment, an exciter 400 may be fixedly connected to the back panel 500 to support the first lamp panel 210a. In other words, the first lamp panel 210a is not directly connected to the back panel 500, but rather connected to the back panel 500 via the exciter 400. Furthermore, to better support the first lamp panel 210a, in this embodiment, a high-resonance frequency exciter 400 may be positioned at each of the four corners of the first lamp panel 210a. These four high-frequency exciters 400 provide support and vibration stimulation, ensuring uniform vibration across the first lamp panel 210a without deviation. A low-resonance frequency exciter 400 (with a less elastic vibration system) may be positioned in the center of the first lamp panel 210a. This exciter 400 primarily stimulates vibration in the first lamp panel 210a.

[0138] In some possible embodiments, reference Figure 7-10The display device 10 may further include a reinforcing plate 250. Specifically, the thickness of the reinforcing plate 250 may be 1 mm to 4 mm. For example, the thickness of the reinforcing plate 250 is 1 mm to 2 mm, 2 mm to 3 mm, or 3 mm to 4 mm. Furthermore, for example, the thickness of the reinforcing plate 250 is 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, or 4 mm. The reinforcing plate 250 is attached to the side of the first lamp board 210a facing away from the display panel 100. For example, the reinforcing plate 250 may be a honeycomb panel. The reinforcing plate 250 may be bonded and fixed to the first lamp board 210a using an adhesive such as double-sided tape. The exciter 400 is connected to the reinforcing plate 250. Thus, the exciter 400 can drive the first lamp board 210a to vibrate by driving the reinforcing plate 250. The reinforcing plate 250 helps to enhance the strength of the first lamp board 210a and improve the vibration transmission efficiency. The first lamp board 210a can also dissipate heat through the reinforcing plate 250.

[0139] In some embodiments, the reinforcing plate 250 is any one of a honeycomb panel, a sandwich panel, or a carbon fiber panel. The sandwich panel can be any one of a honeycomb sandwich panel, a foam sandwich panel, a wood sandwich panel, and an acrylic panel, which are low-cost and readily available. The honeycomb sandwich panel can be an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, or the like. The foam sandwich panel can be a polyvinyl chloride (PVC) foam sandwich panel, a polymethacrylimide (PMI) foam sandwich panel, or the like. The wood sandwich panel can be a balsa wood, or other balsa wood.

[0140] Those skilled in the art are well aware that sound quality can be measured in terms of volume, frequency response range, timbre, and other aspects. Specifically, the sound produced by a sandwich panel has a higher volume and a wider, less undulating audio response than the sound produced by an aluminum panel. In other words, by providing the reinforcement plate 250 , the sound produced by the display device 10 can have better sound quality.

[0141] In some embodiments, reference Figure 8 The reinforcing plate 250 can be divided into multiple sub-plates 251, and the multiple sub-plates 251 are distributed at intervals from each other. The exciter 400 is connected to the first lamp board 210a through the multiple sub-plates 251. In this way, the weight of the reinforcing plate 250 can be further reduced, thereby reducing the mass that the exciter 400 needs to push, reducing energy loss, and improving vibration transmission efficiency.

[0142] In some possible embodiments, combined with Figure 7 、 Figure 9 and Figure 10 , the first light board 210a of the vibration area may be at least one, for example, the first light board 210a may be two, three or more. Figure 9As shown, there are two first lamp panels 210a arranged side by side, and the reinforcing plate 250 can be provided at the joint position of the two first lamp panels 210a, so that the exciter 400 can simultaneously drive the two first lamp panels 210a to vibrate; for example Figure 10 As shown, there are three first light panels 210a arranged side by side, and there can be two reinforcing plates 250. The two reinforcing plates 250 are respectively arranged at two splicing positions defined by the three reinforcing plates 250. The exciter 400 can be connected to the two reinforcing plates 250 at the same time to achieve simultaneous driving of the three first light panels 210a to vibrate.

[0143] Optionally, when there are multiple first lamp boards 210a in the vibration area, the length of each first lamp board 210a can be smaller than the length of the second lamp board 210b. This helps to reduce the mass that the exciter 400 needs to push, reduce energy loss, and improve vibration transmission efficiency.

[0144] <Optical film assembly 110>

[0145] Please continue to refer to Figure 4 As shown, the backlight assembly 200 also includes an optical film assembly 110, the display panel 100 is located on the light-emitting side of the optical film assembly 110, and the light board 210 is located on the light-incident side of the optical film assembly 110. A closed cavity M is formed between the optical film assembly 110 and the display panel 100. Exemplarily, the edge of the display panel 100 is sealed to the edge of the optical film assembly 110 to form a closed cavity between the optical film assembly 110 and the display panel 100.

[0146] The optical film assembly 110 can be of different types depending on the type of light emitted by the light source 240. 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. The reflective sheet is attached to the side of the light panel body 230 where the light source 240 is located.

[0147] When the light source 240 emits blue light, the optical film assembly 110 may include a diffusion film, and the diffusion plate 111 can ensure uniform light. The optical film assembly 110 may also include a fluorescent film and a brightness enhancement film. The diffusion film is arranged on the front side of the light source 240, and the user mixes the light from multiple light sources 240 evenly, 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. In this way, the color of the light emitted by the light source 240 is not restricted. For example, the light source 240 can emit blue light or purple light. The brightness enhancement film is used to increase the brightness of the light. It is understandable that when the light source 240 emits white light, the optical film assembly 110 may also include a diffusion film, a fluorescent film, and a brightness enhancement film. This embodiment is described by taking the optical film assembly 110 as including at least a diffusion film as an example.

[0148] <Support transfer assembly>

[0149] The support and transmission assembly is supported between the first light board 210a and the optical film assembly 110. In some embodiments, the support and transmission assembly includes a plurality of support members 300, which are arranged at intervals along the first light board 210a. One end of the support member 300 is connected to the first light board 210a, and the other end is connected to the diffuser plate 111. In this way, the support member 300 can be used as a vibration transmission medium to transmit the vibration on one side of the first light board 210a to the diffuser plate 111, thereby improving the transmission efficiency of the vibration from the first light board 210a to the display panel 100.

[0150] In addition, by providing the support member 300 , the gap between the light board body 230 and the diffusion plate 111 can be maintained within a preset range, thereby preventing the light source 240 and the display panel 100 from touching each other at a certain position and generating collision noise.

[0151] It is understandable that the support member 300 may be made of a silicone material that is easy to guide light, and the hardness of the silicone material is relatively low. In other words, the support member 300 is a silicone member or a rubber member.

[0152] In addition, it should be noted that, considering that the internal temperature of the display device 10 changes when it is in operation, materials such as silicone and rubber will age with temperature changes, resulting in a reduction in the cushioning effect of the support member 300, a decrease in support strength, and a decrease in vibration transmission efficiency. Therefore, in some embodiments, the support member 300 may also be a composite structure to ensure reliable vibration transmission performance. For example, the support member 300 may be made of a material whose deformation is not sensitive to temperature, for example, the support member 300 may be made of a hard material with high strength such as metal or plastic.

[0153] In some embodiments, the support member 300 can be a conical structure. For example, the support member 300 can be a conical structure or a quadrangular prism-shaped structure, and the cross-sectional size of the support member 300 can gradually decrease from one end of the lamp board 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 member 300 helps to avoid the light beam of the light source 240 and avoid affecting the normal light output of the lamp board 210.

[0154] <Exciter 400>

[0155] Please continue to refer to Figure 4As shown, the exciter 400 is disposed on the side of the first light panel 210a away from the optical film assembly 110. In this way, the arrangement of the exciter 400 does not affect the display of the display device 10, and the exciter 400 can use the sound generated by the display panel 100 to provide vibration. Specifically, the exciter 400 can transmit the vibration directly to the optical film assembly 110 through the first light panel 210a and the support transmission assembly in sequence. The optical film assembly 110 then indirectly transmits the vibration to the display panel 100 through the cavity, thereby driving the display panel 100 to vibrate. The display panel 100 generates sound through the sound waves generated by the vibration, so that the display panel 100 can be used for both display and to replace the speaker for sound generation. The sound and image positions approximately coincide with the center position of the picture, achieving a unified audio and video, and providing a better audio-visual effect for the user.

[0156] In some embodiments, please refer to Figure 11 As shown, the actuator 400 includes an actuator 410, a damper 420, and a housing 430. The vibration output end of the actuator 410 is connected to the first light board 210a, one end of the damper 420 is connected to the actuator 410, and the other end of the damper 420 is connected to the housing 430. The damper 420 has good thermal conductivity. As a result, the damper 420 can serve as a heat conductor between the actuator 410 and the housing 430 to transfer heat generated by the vibration of the actuator 410 to the outside for dissipation. In this way, in addition to the actuator 410 itself dissipating heat through the air, the heat generated by the actuator 410 can also be transferred to the housing 430 through the damper 420 for dissipation. This increases the thermal conduction path of the actuator 410, thereby reducing the temperature of the actuator 410, improving heat dissipation efficiency, preventing heat from being transferred to the display panel 100, causing a local temperature increase that affects image display quality, and improving the image display quality of the display device 10.

[0157] In the display device 10 provided in some embodiments of the present application, the first lamp panel 210a is directly driven by the actuator 400, so that the first lamp panel 210a transmits vibration directly to the optical film assembly 110 through the support transmission assembly, and the optical film assembly 110 then indirectly drives the display panel 100 to vibrate through the closed cavity. In this way, while ensuring the transmission efficiency, the display panel 100 can be subjected to uniform force in the entire plane range, thereby increasing the actual vibration area of the display panel 100, thereby achieving low-frequency sound performance with 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 its reciprocating vibration. By setting a damper 420 to connect the housing 430 of the exciter 400 and the actuator 410, the heat generated by the vibration of the actuator 410 is transferred to the housing 430 for heat dissipation. In this way, in addition to being dissipated through the air, the heat generated by the actuator 410 can also be dissipated through the damper 420, which is beneficial to reducing the temperature of the actuator 410, avoiding the heat transfer to the display panel 100, causing the local temperature to rise and affecting the image display quality, and improving the image display quality of the display device 10.

[0158] In some embodiments, please refer to Figure 11 As shown, the damper 420 includes a wavy body 4201, a first connecting portion 4202, and a second connecting portion 4203. The wavy body 4201 is arranged in a plane parallel to the display panel 100. The wavy body 4201 has a wave-like structure, with one end bent to form the first connecting portion 4202, which is connected to the actuator 410. The other end of the wavy body 4201 is bent to form the second connecting portion 4203, which is connected to the housing 430. The second connecting portion 4203 can be directly connected to the housing 430, or indirectly connected to the housing 430 via other components. Both the first connecting portion 4202 and the second connecting portion 4203 are sheet-like structures, which help increase the connection area between the damper 420 and the housing 430 and the actuator 410, improving the stability of the connection and facilitating heat transfer.

[0159] In this embodiment of the present application, actuator 400 utilizes a damper 420 to transfer heat generated by the vibration of actuator 410 to housing 430 for dissipation. This allows heat generated by actuator 410 to be dissipated not only through the air but also through damper 420, thereby lowering the temperature of actuator 410 and minimizing the impact of localized temperature on image display quality. Furthermore, the provision of a first connecting portion 4202 increases the connection area with actuator 410, while the provision of a second connecting portion 4203 increases the connection area with housing 430, enhancing heat dissipation.

[0160] The damper 420 of the embodiment of the present application increases the heat conduction path of the actuator 410. The thermal conductivity of the damper 420 is approximately 3 to 4 times that of copper. The lateral thermal conductivity of the damper 420 can reach 1000 W / m·K, which is significantly more efficient than air heat dissipation. It can reduce the temperature of the actuator 410 and the local temperature of the sound-emitting screen of the display device 10, avoid the occurrence of "hot" spots on the screen, reduce the unevenness of the screen brightness and color, and increase the maximum power and operating reliability of the actuator 400 or speaker.

[0161] The thermal conductivity of the damper 420 in the embodiment of the present application is several times that of general metal materials such as copper and aluminum, so that the heat of the actuator 410 can be mainly transferred to the housing 430 through the damper 420, thereby reducing the temperature of the vibration output end of the actuator 410 and reducing the impact of local temperature on the image display quality of the display device 10.

[0162] In some embodiments, the damper 420 is bonded to the actuator 410 and the housing 430 , respectively. For example, the damper 420 is bonded to the actuator 410 and the housing 430 , respectively, by glue, and the connection method is simple and stable.

[0163] In some embodiments, reference Figures 12 to 14 The damper 420 includes a stacked fiber layer 421 and a thermally conductive layer. The fiber layer 421 includes, but is not limited to, mesh or fiberglass mesh, and has been resin-impregnated and cured. The thermally conductive layer 422 can be a graphene film, made from flake graphite, oxidized to form a graphene oxide slurry, and then coated, sintered, reduced, and rolled. Alternatively, the thermally conductive layer 422 can be formed by coating or spraying a thermally conductive material onto the fiber layer 421.

[0164] The following describes the manufacturing process of the damper 420 by taking the heat conducting layer 422 as an example.

[0165] A possible manufacturing method for the elastic wave 420 includes: first, using flake graphite as the raw material, performing an oxidation and pulping process to form a graphene oxide slurry; then applying it to form a base film, and then performing a sintering, reduction, and calendaring process to form a graphene membrane; second, using fiber mesh cloth as the raw material, impregnating the fiber mesh cloth with resin to form a fiber membrane; finally, stacking the graphene membrane and the fiber membrane, and embossing them into a wavy shape. After curing, the elastic wave 420 with high thermal conductivity is formed.

[0166] In some embodiments, the damper 420 is formed by stacking a fiber layer 421 and a heat-conducting layer 422, with the fiber layer 421 serving as a skeleton. The fiber layer 421 has certain elasticity, vibration damping, and ventilation properties, while the heat-conducting layer 422 has high thermal conductivity. Thus, the damper 420 is not only elastic but also highly thermally conductive, thereby facilitating the transfer of heat generated by the actuator 410 to the housing 430 while reducing the amount of heat generated by the actuator 410 being transferred to the display panel 100.

[0167] In some embodiments, reference Figure 12 and Figure 14 The elastic wave 420 includes a fiber layer 421 and a heat conducting layer 422 stacked together. Figure 12 and Figure 14 In the embodiment, the fiber layer 421 is provided with two layers, and the heat conducting layer 422 is located between the two fiber layers 421 .

[0168] In other embodiments, referring to Figure 13 As shown, the damper 420 includes a stacked fiber layer 421 and a heat conducting layer 422 . The heat conducting layer 422 includes two layers, and the fiber layer 421 is located between the two heat conducting layers 422 .

[0169] In some other embodiments, the damper 420 includes multiple fiber layers 421 and multiple heat-conducting layers 422 , and the multiple fiber layers 421 and the multiple heat-conducting layers 422 are alternately stacked.

[0170] In the embodiment of the present application, the damper 420 is provided with multiple fiber layers 421 to improve the structural strength of the damper 420 ; and the damper 420 is provided with multiple heat conductive layers 422 to improve the thermal conductivity of the damper 420 .

[0171] In some embodiments, please refer to Figure 15 As shown, the thermally conductive layer 422 contacts the outer shell 430 to improve heat transfer efficiency and, in turn, the heat dissipation efficiency of the actuator 410. When the thermally conductive layer 422 is located on at least one surface of the damper 420, that surface directly contacts the outer shell 430. When the thermally conductive layer 422 is located within the inner layer of the damper 420, for example, between two fiber layers 421, the fiber layers 421 of the damper 420 facing the outer shell 430 are notched, allowing the thermally conductive layer 422 to be positioned on the surface of the damper 420 and, in turn, contact the outer shell 430.

[0172] Combine Figure 15 The fiber layer 421 corresponding to the second connection portion 4203 of the wave damper 420 is provided with a notch, so that the heat conducting layer 422 is arranged on the surface of the wave damper 420 , and the surface is in contact with the housing 430 .

[0173] It is understandable that the heat conducting layer 422 may be in direct contact with the housing 430 , or when the heat conducting layer 422 is indirectly connected to the housing 430 through other components, the heat conducting layer 422 may be in indirect contact with the housing 430 through other components.

[0174] In some embodiments, the heat conducting layer 422 has a plurality of heat dissipation holes penetrating two opposite surfaces of the heat conducting layer 422 to increase heat dissipation efficiency.

[0175] In other embodiments, please refer to Figures 16 to 18 The elastic wave 420 includes a stacked heat-conducting film 423 and a fiber layer 421, 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 in the above embodiment, and then the heat-conducting film 423 is prepared and formed, and the heat-conducting film 423 is formed into an integrated elastic wave 420 through a process such as bonding or hot melting. The through holes 4231 provided on the heat-conducting film 423 can be circular holes, elliptical holes, polygonal holes, irregular holes, etc.; multiple 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 embodiment of the present application does not limit the number, shape, and arrangement of the through holes 4231.

[0176] The thickness of the thermally conductive film 423 can be 100μm to 1000μm. For example, the thickness of the thermally conductive film 423 is 100μm to 200μm, 200μm to 350μm, 350μm to 500μm, 500μm to 600μm, 600μm to 750μm, 750μm to 850μm, 850μm to 1000μm; for example, the thickness of the thermally conductive film 423 is 200μm, 300μm, 400μm, 500μm, 600μm, 700μm, 800μm, 900μm, etc.

[0177] The damper 420 of the embodiment of the present application uses a fiber layer 421 as a skeleton, a thermally conductive film 423 and multiple through holes 4231 on the thermally conductive film 423 to improve the heat dissipation efficiency of the thermally conductive film 423 ; moreover, the thermally conductive film 423 can also have a certain degree of flexibility.

[0178] In some examples, reference Figure 18 The heat-conducting film 423 having the through-holes 4231 is provided with two layers, and the fiber layer 421 is provided between the two layers of the heat-conducting film 423 .

[0179] In other examples, refer to Figure 16 and Figure 17 The fiber layer 421 is provided with two layers, and the heat conductive film 423 with through holes 4231 is provided between the two fiber layers 421 .

[0180] In some other examples, the thermally conductive film 423 and the fiber layer 421 are respectively provided with multiple layers, and the thermally conductive film 423 and the fiber layer 421 are alternately stacked.

[0181] The damper 420 of the embodiment of the present application improves the structural strength of the damper 420 by disposing multiple fiber layers 421 , and improves the thermal conductivity of the damper 420 by disposing multiple thermal conductive films 423 having through holes 4231 .

[0182] For the damper 420 of this embodiment, the heat conductive film 423 is in contact with the housing 430 , which is beneficial to improving the heat transfer efficiency and further improving the heat dissipation efficiency of the actuator 410 .

[0183] Please refer back to Figure 11 As shown, the actuator 400 of this embodiment of the present application also includes a heat-conducting pressure ring 440, which is configured to press the damper 420 against the housing 430. The heat-conducting pressure ring 440 can be metal, which helps ensure efficient heat transfer. The second connection portion 4203 of the damper 420 is pressed against the housing 430 by the heat-conducting pressure ring 440, which helps improve the stability and tightness of the connection between the damper 420 and the housing 430, and facilitates heat transfer.

[0184] For example, the heat-conducting pressing ring 440 and the housing 430 , as well as the heat-conducting pressing ring 440 and the damper 420 , can be bonded together, and the connection method is simple and stable.

[0185] Continue to refer to Figure 11 Taking the exciter 400 as an electromagnetic exciter 400 as an example, the electromagnetic exciter 400 includes a magnetic component 450 and a voice coil, wherein the magnetic component 450 is used to generate a magnetic field, and the voice coil vibrates along the axis direction of the voice coil in the magnetic field.

[0186] In some embodiments, magnetic assembly 450 includes a magnetic permeable member 451 and a magnetic member 452 , with a magnetic air gap N formed between magnetic permeable member 451 and magnetic member 452 . Magnetic permeable member 451 is cylindrical with an opening, and magnetic member 452 is disposed on the bottom surface of magnetic permeable member 451 . A gap is formed between the inner wall surface of magnetic permeable member 451 and magnetic member 452 , forming magnetic air gap N. Magnetic assembly 450 is configured to provide a stable magnetic field in magnetic air gap N.

[0187] One end of the voice coil is connected to the first light board 210a. A sheet-like connecting structure 411 can also be provided between the voice coil and the first light board 210a to increase the connection area between the voice coil and the first light board 210a and prevent the voice coil and the first light board 210a from being separated from each other. The other end of the voice coil is inserted into the magnetic air gap N, and the voice coil is fixed to the housing 430 via a spring 420. As the magnetic field changes, the voice coil is forced to move back and forth along its own axis. In other words, when the exciter 400 is an electromagnetic exciter 400, the voice coil constitutes the actuator 410, and the end of the actuator 410 that is away from its vibration output end is located within the magnetic air gap N.

[0188] In this way, under the influence of the magnetic field, the electromagnetic force causes the voice coil to resonate at a higher frequency, directly vibrating the first light board 210a. The reaction force of the electromagnetic force causes the larger actuator 400 to resonate at a lower frequency, vibrating the first light board 210a through the connector. The actuator 400's housing 430 is not fixed to a fixed support, but vibrates with the vibration of the driven first light board 210a. This is the biggest difference between the OLED screen actuator 400 housing 430 fixed to the bracket excitation method.

[0189] The magnetic member 451 is fixedly connected to the housing 430, and the other end of the damper 420 is connected to the housing 430 through the magnetic member 451. Specifically, the second connecting portion 4203 of the damper 420 is pressed against the magnetic member 451 via the thermally conductive pressure ring 440. For example, the second connecting portion 4203 and the magnetic member 451, the thermally conductive pressure ring 440 and the magnetic member 451, and the thermally conductive pressure ring 440 and the housing 430 are bonded together, providing a simple and stable connection.

[0190] The exciter 400 of the embodiment of the present application reduces the width of the exciter 400 by connecting the elastic wave 420 to the shell 430 through the magnetic component 451. Since the axial dimension of the actuator 410 is relatively large, the stacking and pressing of the thermal conductive pressure ring 440, the magnetic component 451 and the shell 430 will not affect the overall thickness of the exciter 400. The connection method of the elastic wave 420 set in this way can not only ensure the stability of the connection, but also help to make the structure of the exciter 400 compact.

[0191] Specifically, the magnetic conductive component 451 of the embodiment of the present application includes a U-shaped body and a third connecting portion. 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 to the shell 430.

[0192] Please continue to refer to Figure 11 Ventilation holes 4511 are provided at the portion of the magnetic member 451 that contacts the damper 420 to improve the heat dissipation efficiency of the magnetic member 451 and the amount of heat dissipated by the actuator 410 through the damper 420. The ventilation holes 4511 may be circular holes, and the present embodiment does not limit the shape, number, or arrangement of the ventilation holes 4511.

[0193] In some possible embodiments, the portion of the housing 430 that contacts the magnetic conductive member 451 is provided with ventilation holes 431. Ventilation holes 431 can be opposite ventilation holes 4511 to further improve heat dissipation efficiency. Ventilation holes 431 can be circular holes. The present embodiment does not limit the shape, number, or arrangement of ventilation holes 431.

[0194] In some embodiments, please refer to Figure 4 As shown, the exciter 400 can be fixed to the back plate 500 by means of an elastic pad 460 and a fixing pin. In this way, the elastic pad 460 can buffer vibrations and prevent the vibration of the exciter 400 from causing abnormal noises in the back plate 500.

[0195] The backplane 500 includes a backplane body and a first side panel. The backplane body is configured to support the light panel 210 and the display panel 100. The backplane body is provided with an opening. The first side panel extends along the edge of the backplane body and protrudes from the backplane body toward one side of the display panel 100. In other words, the first side panel protrudes from the front side of the backplane body. Thus, the first side panel is disposed circumferentially outside the light panel 210 and the display panel 100.

[0196] The display device 10 of the embodiment of the present application further includes a first adhesive member, which may be double-sided tape, foam, or the like. The first adhesive member is configured to connect the back panel and the light panel 210. Multiple first adhesive members may be provided to ensure that the spacing between the light panel 210 and the back panel 500 at different locations is within a preset range. In other words, the vibration amplitude at different locations of the light panel 210 is relatively uniform, thereby preventing noise generated during the vibration of the light panel 210.

[0197] Furthermore, the first adhesive member can be provided to limit the position of the lamp board 210 , thereby preventing the lamp board 210 from being deformed and affecting the vibration and sound generation after the display device 10 is assembled.

[0198] In some embodiments, the first adhesive is arranged between two adjacent light boards 210. At this time, the first adhesive constitutes a connecting member, so that the two adjacent light boards 210 are spliced through the first adhesive. The first adhesive is arranged in this way. While multiple light boards 210 are spliced, the light boards 210 and the back panel 500 are connected, which is conducive to simplifying the assembly process of the display device 10 and improving production efficiency.

[0199] <Back cover>

[0200] In some embodiments, the display device 10 further includes a rear cover (not shown), which is located on the side of the back plate 500 facing away from the display panel 100. That is, the rear cover is disposed on the rear side of the back plate 500. The controller, electrical connections, etc. of the display device 10 can be disposed between the back plate 500 and the rear cover to simplify the appearance of the display device 10. The rear cover can be made of plastic, metal, etc.

[0201] In other embodiments, a damping block is provided at the end of the outer shell 430. The damping block can be double-sided tape, foam, etc. The damping block can be connected to the side of the light board 210 facing the back panel 500. In this way, there is a larger relative movement range between the outer shell 430 and the light board 210, which is conducive to realizing the exciter 400 driving the display panel 100 to vibrate in an inertial driving manner.

[0202] In some embodiments, there are problems in the vibration transmission process of the exciter 400. The thickness of the air gap between the display panel 100 and the light board 210 varies greatly due to material tolerances, assembly process tolerances, and its own gravity, resulting in the inability to ensure the consistency of the vibration transmission efficiency. The fit between the display panel 100 and the light board 210 causes vibration noise and abrasion.

[0203] To avoid the aforementioned issues, some embodiments of the present application include a support member 300 between the display panel 100 and the light board 210. The support member 300 has the following features: one side contacts the display panel 100, and the other side contacts the light board 210. One or both sides are connected to the contact positions via a mechanical structure or a fixed method such as adhesive. The support member 300 may include a buffer portion, which may be made of, for example, a high-rebound material or a combination of materials with a rebound function, such as silicone. The support member 300 ensures the stability of the air gap between the display panel 100 and the light board 210, preventing abnormal collision noise between the display panel 100 and the light board 210. Furthermore, the solid support member 300 improves the efficiency of vibration transmission from the light board 210 to the display panel 100.

[0204] By setting a support member 300 between the light board 210 and the optical film assembly 110, the optical film assembly 110 and the light board 210 can be connected as a whole, that is, it can be equivalent to a single-layer screen, avoiding relative movement between the optical film assembly 110 and the light board 210 due to the large gap in the cavity M.

[0205] Furthermore, because the optical film assembly 110 converts and evens the light generated by the light source of the light panel 210, even if the support member 300 is provided 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. Thus, there are no restrictions on the shape and size of the support member 300, or the contact area between the support member 300 and the optical film assembly 110. The cross-section of the support member 300 (the cross-section perpendicular to the display device) can be rectangular or cylindrical. Of course, the cross-section of the support member 300 can also be conical, trapezoidal, dumbbell-shaped, or other shapes.

[0206] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0207] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with an embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0208] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display device, characterized in that: include: a display panel configured to display an image; A backlight assembly, wherein the backlight assembly includes a vibration area in a plane direction thereof, and the backlight assembly includes: An optical film assembly, wherein 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. a light board, the light board being located on the light incident side of the optical film assembly, the light board comprising a first light board and a second light board, the first light board being located in the vibration area, and the second light board being located outside the vibration area; A support transmission assembly, supported between the first light panel and the optical film assembly; The exciter is arranged on the side of the first light board away from the optical film assembly. The exciter includes an actuator, a damper and a shell. The vibration output end of the actuator is connected to the first light board, one end of the damper is connected to the actuator, and the other end of the damper is connected to the shell.

2. The display device according to claim 1, wherein The optical film assembly includes a diffuser plate, and the support transmission assembly includes a plurality of support members, which are arranged at intervals along the surface of the first light board, and one end of the support member is connected to the first light board, and the other end is connected to the diffuser plate.

3. The display device according to claim 2, wherein The damper includes a fiber layer and a heat-conducting layer that are stacked, and the heat-conducting layer is in contact with the shell.

4. The display device according to claim 3, wherein Include one of the following: The elastic wave comprises two fiber layers and a heat-conducting layer, wherein the heat-conducting layer is arranged between the two fiber layers; Alternatively, the elastic wave comprises one fiber layer and two heat-conducting layers, and the fiber layer is located between the two heat-conducting layers; Alternatively, the elastic wave comprises at least two layers of the fiber layers and at least two layers of the heat-conducting layers, and the at least two layers of the fiber layers and the at least two layers of the heat-conducting layers are alternately stacked in sequence.

5. The display device according to claim 4, wherein: The heat-conducting layer has a plurality of heat-dissipating holes penetrating two opposite surfaces of the heat-conducting layer.

6. The display device according to claim 2, wherein: The damper includes a stacked heat-conducting film and a fiber layer, and the heat-conducting film is provided with a plurality of through holes.

7. The display device according to any one of claims 1 to 5, characterized in that: The actuator further includes a heat-conducting pressure ring configured to press the elastic wave against the housing.

8. The display device according to any one of claims 1 to 5, characterized in that: The exciter also includes a magnetic component, which includes a magnetic conductive part and a magnetic part. A magnetic air gap is formed between the magnetic conductive part and the magnetic part. An end of the actuator facing away from its vibration output end is located in the magnetic air gap; one end of the elastic wave is connected to the housing through the magnetic conductive part.

9. The display device according to any one of claims 1 to 5, characterized in that: Also includes: a back plate, the back plate being arranged on a side of the light board away from the display panel, the second light board being fixedly connected to the back plate; The first light board is configured to move relative to the second light board under the push of an actuator.

10. The display device according to claim 9, wherein The first light panel is connected to the back panel via a first elastic connector; Alternatively, the first light board is connected to the adjacent second light board via a second elastic connecting member.

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