Display device

Abstract

The application discloses a display device, wherein a sounding plate is fixed to the surface of a backlight module away from a display panel, a sounding exciter excites the sounding plate to vibrate, an elastic support is arranged in an interference mode between the backlight module and the display panel, an isolation wall is arranged between a middle frame structure and a rear shell, a back radiation superposition cavity is formed between the isolation wall, the rear shell and the middle frame structure, and the back radiation superposition cavity has a sound outlet opening towards the front or side of the display device. Some embodiments of the application overcome the industry bottleneck problem that it is difficult to realize the sounding of the display screen, improve the vibration transmission efficiency, and make up for the high-frequency loss of the sound of the display device.

Description

[0001] The present application is a divisional application, the original application's application number is 202210612383.2, the original application's filing date is May 31, 2022, the original application's invention creation name is "Display device", and the original application's entire content is incorporated by reference in the present application. TECHNICAL FIELD

[0002] The present application relates to the technical field of display. More specifically, it relates to a display device. BACKGROUND

[0003] The size of the loudspeaker in the display device, such as a television, is generally small due to the limitation of the appearance of the ultra-thin model installation position, and is forced to adopt a downward sound or rear sound emission mode, resulting in a separation of the sound image position and the image position, which is not good for the visual experience and cannot provide an audio-visual experience of sound and picture integration.

[0004] In theory, as long as a flat-panel display device can directly vibrate the display panel through a sound-emitting exciter, it can generate sound waves. For example, an OLED (Organic Light-Emitting Diode) screen has realized self-sound technology, i.e., the OLED panel serves as a display and a loudspeaker diaphragm to realize sound and picture integration for audio-visual effects. However, when the display panel is an LCD (Liquid Crystal Display), the liquid crystal display panel has many independent and stacked layers, and the back of the display panel needs to be provided with a backlight source for uniform illumination. The backlight source illumination cannot be blocked, so it is not possible to install a sound-emitting exciter on the panel, and there is a large distance between the backlight source and the display panel, which does not have a path for effectively transmitting vibrations to the liquid crystal display panel. These bottleneck problems have made it difficult to find a solution for the sound-emitting of liquid crystal display screens. SUMMARY

[0005] To solve the problems set forth in the background, some embodiments of the present application provide a display device that overcomes the industry bottleneck problem of the difficulty of sound-emitting of liquid crystal display screens, improves the vibration transmission efficiency, and makes up for the high-frequency loss of sound-emitting of display devices.

[0006] The present application provides a display device, comprising:

[0007] a display panel, a backlight module, a sound-emitting plate, a sound-emitting exciter, a middle frame structure, a plurality of elastic supporting members, and a rear shell.

[0008] The backlight module is located on one side of the display panel. The sound-emitting plate is fixed to the surface of the backlight module away from the display panel. The vibration output terminal of the sound exciter is fixed to the surface of the sound-emitting plate away from the backlight module. The sound exciter is used to excite the sound-emitting plate to vibrate through the vibration output terminal so as to drive the backlight module to vibrate.

[0009] The elastic support is interference-fitted between the backlight module and the display panel;

[0010] The middle frame structure is located on the side of the sound-emitting plate away from the backlight module, and at least part of the rear shell is located on the side of the middle frame structure away from the sound-emitting plate, and on the side of the sound-emitting exciter away from the sound-emitting plate;

[0011] An isolation wall is provided between the middle frame structure and the rear shell, and a back-radiating superimposed cavity is formed between the isolation wall, the rear shell and the middle frame structure. The back-radiating superimposed cavity has a sound outlet facing the front or side of the display device.

[0012] As can be seen from the above technical solutions, some embodiments of the present invention utilize a sound-generating plate, enabling the sound exciter to transmit vibrations to the liquid crystal display panel, causing the liquid crystal display panel to vibrate and produce sound. Furthermore, since the vibration output terminal of the sound exciter is fixed to the surface of the sound-generating plate away from the backlight module, the setting of the sound exciter does not affect the display device's display, making it possible for traditional liquid crystal screens to produce sound. This provides users with an integrated audio-visual experience where sound originates from the image, overcoming the industry bottleneck problem of the difficulty in achieving sound generation from liquid crystal display screens. In addition, the use of elastic support components avoids abnormal collision noise and improves vibration transmission efficiency. Moreover, the back-radiation superposition cavity formed between the isolation wall, back shell, and middle frame structure guides the back-vibration multi-mode high-frequency vibration bending waves to the front or side of the screen for sound emission, which can improve the response at the resonant frequency to compensate for the high-frequency loss in the display device's sound emission. Attached Figure Description

[0013] To more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to an exemplary embodiment of the present invention;

[0015] Figure 2 This is a block diagram illustrating the configuration of a control device according to an exemplary embodiment of the present invention;

[0016] Figure 3 This is a configuration block diagram of a display device according to an exemplary embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the interface of a video-on-demand program according to an exemplary embodiment of the present invention;

[0018] Figure 5 This is a three-dimensional structural diagram of a display device according to an exemplary embodiment of the present invention;

[0019] Figure 6 This invention illustrates an example of a method along... Figure 5 A schematic diagram of the cross-sectional structure along the AA' direction;

[0020] Figure 7 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0021] Figure 8 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0022] Figure 9 This is a three-dimensional structural schematic diagram of a sound-generating exciter according to an exemplary embodiment of the present invention;

[0023] Figure 10 This is a schematic cross-sectional view of a sound-generating exciter according to an exemplary embodiment of the present invention;

[0024] Figure 11 This is a top view of a backlight module according to an exemplary embodiment of the present invention;

[0025] Figure 12 The invention is illustrated in an exemplary embodiment along the [path]. Figure 11 Schematic diagram of the cross-sectional structure in the middle BB' direction;

[0026] Figure 13 This is an exploded view of a display device according to an exemplary embodiment of the present invention;

[0027] Figure 14 This is a three-dimensional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0028] Figure 15 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0029] Figure 16 This is a three-dimensional structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0030] Figure 17 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0031] Figure 18 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0032] Figure 19 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0033] Figure 20 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0034] Figure 21 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0035] Figure 22 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0036] Figure 23 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0037] Figure 24 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0038] Figure 25 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0039] Figure 26 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0040] Figure 27 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0041] Figure 28 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0042] Figure 29 This invention illustrates an example of a method along... Figure 27 A schematic diagram of the cross-sectional structure along the CC' direction;

[0043] Figure 30 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0044] Figure 31 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0045] Figure 32 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0046] Figure 33 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0047] Figure 34 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0048] Figure 35 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0049] Figure 36 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention;

[0050] Figure 37 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0051] Figure 38 This is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0052] Figure 39 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0053] Figure 40 This is a schematic cross-sectional view of another liquid display device according to an exemplary embodiment of the present invention.

[0054] Figure 41 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention;

[0055] Figure 42 This is a three-dimensional structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0056] Figure 43 This is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0057] Figure 44 This is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0058] Figure 45This is a front view structural diagram of another display device according to an exemplary embodiment of the present invention. Detailed Implementation

[0059] To make the objectives and implementation methods of the present invention clearer, the exemplary embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of the present invention. Obviously, the exemplary embodiments described are only some embodiments of the present invention, and not all embodiments.

[0060] It should be noted that the brief descriptions of terminology in this invention are merely for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this invention. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0061] In this invention, the terms "first," "second," "third," etc., used in the specification, claims, and accompanying drawings are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0062] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclude inclusion, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0063] The display device provided in the embodiments of the present invention can have various implementation forms, such as a television, a smart television, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is a specific embodiment of the display device of the present invention.

[0064] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to an exemplary embodiment of the present invention. Figure 1 As shown, a user can operate the display device 200 via the smart device 300 or the control device 100. In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactive features to the display device 200. The server 400 can be a cluster or multiple clusters, and may include one or more types of servers.

[0065] Figure 2 This is a block diagram illustrating the configuration of a control device according to an exemplary embodiment of the present invention. Figure 2 As shown, the control device 100 includes a controller 110, a communicator 130, a user input / output interface 140, a memory, and a power supply. The control device 100 can receive user input operation commands. The communicator 130 is communicatively connected to the display device 200. The control device 100 converts the operation commands into commands that the display device 200 can recognize and respond to, thus acting as an intermediary for interaction between the user and the display device 200.

[0066] Figure 3 This is a configuration block diagram of a display device according to an exemplary embodiment of the present invention. Figure 3 As shown, the display device 200 includes at least one of the following: a tuner 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply, and a user interface.

[0067] In some embodiments, after the display device is started, it can directly enter the interface of a preset video-on-demand program. The interface of the video-on-demand program can be as follows: Figure 4 As shown, it includes at least a navigation bar 310 and a content display area located below the navigation bar 310. The content displayed in the content display area changes as the selected control in the navigation bar changes. Programs in the application layer can be integrated into a video-on-demand program and displayed via a control in the navigation bar, or further displayed after an application control in the navigation bar is selected.

[0068] Figure 5 This is a three-dimensional structural diagram of a display device according to an exemplary embodiment of the present invention. Figure 6 This invention illustrates an example of a method along... Figure 5 A schematic diagram of the cross-sectional structure along the AA' direction. (Combined with...) Figure 5 and Figure 6 The display device includes a liquid crystal display panel 1 and a backlight module 2. The backlight module 2 is located on one side of the liquid crystal display panel 1 and forms a sealed air cavity 4 with the liquid crystal display panel 1. The display device also includes a sound-emitting plate 5 and a sound-emitting exciter 6. The sound-emitting plate 5 is fixed to the surface of the backlight module 2 away from the liquid crystal display panel 1. The vibration output terminal of the sound-emitting exciter 6 is fixed to the surface of the sound-emitting plate 5 away from the backlight module 2. The sound-emitting exciter 6 is used to excite the sound-emitting plate 5 to vibrate through the vibration output terminal so as to drive the backlight module 2 to vibrate.

[0069] In some embodiments, the present invention provides a screen-based self-sounding liquid crystal display device, belonging to the field of multimedia technology combining display devices and electroacoustics. Figure 5 and Figure 6The backlight module 2 is located on one side of the liquid crystal display panel 1 and forms a sealed air cavity 4 with the liquid crystal display panel 1. The air in the air gap formed by the sealed air cavity 4 has viscosity, and its kinematic viscosity is many times higher than that of water, for example, 15 times higher. The sealed air gap is equivalent to a damping spring between the liquid crystal display panel 1 and the backlight module 2 and inside the liquid crystal display panel 1. The sound exciter 6 is used to excite the sound-emitting plate 5 to vibrate through the vibration output terminal to drive the backlight module 2 to vibrate. Then, using the damping spring equivalent to the sealed air gap, the vibration force of the sound exciter 6 vibrating the back plate 30 in the backlight module 2 is transmitted to the front plate of the liquid crystal display panel 1, so that the liquid crystal display panel 1 vibrates and produces sound. Since the sound exciter 6 is located on the surface of the sound-emitting plate 5 away from the backlight module 2, the setting of the sound exciter 6 does not affect the display of the display device. In addition, the backlight module 2 includes a back plate 30 and a light-emitting structure 18 on the back plate 30. There is a certain distance between the lower surface of the liquid crystal display panel 1 and the light-emitting structure 18 on the back plate 30, such as the top of the lamp bead. The air gap between the liquid crystal display panel 1 and the back plate 30 in the backlight module 2 can be the same as or slightly higher than the height of the light-emitting structure 18.

[0070] For example, the sound-emitting panel 5 can be a honeycomb panel or a carbon fiber panel. When the display device has a screen size of 65 inches and uses aluminum honeycomb as the sound-emitting panel 5, the thickness of the sound-emitting panel 5 can be, for example, 1 mm to 4 mm. The core material of the sound-emitting panel 5 includes, but is not limited to, paper, aramid, metal or other rigid foam materials, and the skin material of the sound-emitting panel 5 includes, but is not limited to, glass fiber, carbon fiber, glass-carbon hybrid fiber, plastic or lightweight aluminum. In addition, the sound-emitting panel 5 can also serve as a heat-conducting and heat-dissipating plate for the backplate 30 in the backlight module 2.

[0071] Figure 7 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 8 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 5 to Figure 8 The sound-generating exciter 6 can be, for example, an electromagnetic vibration exciter. The sound-generating exciter 6 comprises coil tubes 805 and 806, magnetic circuits 801, 802, and 804, a spring wave 807, and a buffer pad, among other structures. The sound-generating exciter 6 vibrates the sound-generating plate 5 via inertial drive. The inertial drive includes the sound-generating exciter 6 and its own supporting and stabilizing structure. The inertial drive does not require additional support or fixation at the rear of the sound-generating exciter 6; the sound-generating exciter 6 vibrates as a whole with the display device.

[0072] In some embodiments, the vibration output terminal 7 of the sound-generating exciter 6 is directly connected to one side of the sound-generating plate 5, the central axis of the sound-generating exciter 6 is perpendicular to the plane of the sound-generating plate 5, and the vibration output direction is along the central axis of the sound-generating exciter 6 and perpendicular to the surface of the display device. Figure 7In the vertical direction, under the influence of the magnetic field, the electromagnetic force causes a high-frequency resonance in the lighter coil tube, which directly vibrates the sound-emitting plate 5 and the backlight module 2. The reaction force of the electromagnetic force causes the heavier sound-emitting exciter 6 to produce a lower-frequency resonance, which vibrates the sound-emitting plate 5 and the backlight module 2 through the buffer pad at the fulcrum. The sound-emitting exciter 6 is not fixed, but vibrates with the driven sound-emitting plate 5 and backlight module 2. This is the biggest difference between the OLED screen sound-emitting exciter 6 and the excitation method where the body is fixed to the bracket.

[0073] like Figure 7 As shown, a fixing pin 63 is provided at position 37 of the middle frame structure. The sound-generating exciter 6 is connected to the fixing pin 63 through an I-shaped silicone isolation pad, allowing the sound-generating exciter 6 to obtain a suspended support and fixation with a certain degree of freedom of back-and-forth movement through the silicone isolation pad. Alternatively, it can be as follows: Figure 8 As shown, the sound exciter 6 is directly fixed to the sound-generating plate 5. Figure 9 This is a three-dimensional structural diagram of a sound-generating exciter according to an exemplary embodiment of the present invention, combined with... Figure 8 and Figure 9 The sound-generating exciter 6 has three or four sheet-like elastic legs 64 with low elastic coefficients extending away from the center. The sheet-like elastic legs 64 extend in a spiral or radial manner away from the center. The end of the sheet-like elastic legs 64 away from the center is fixed to the sound-generating plate 5 by a damping block 65. The damping block 65 can be, for example, EVA (ethylene-vinyl acetate copolymer) with double-sided adhesive on its surface. Figure 10 This is a schematic cross-sectional view of a sound-generating exciter according to an exemplary embodiment of the present invention. Figure 10 As shown, the sound exciter 6 has a guide rod 807 and a diaphragm 808. The high-frequency resonance generated on the coil tubes 805 and 806 is transmitted to the back diaphragm 808 through the guide rod 807, which can increase the high-frequency sound wave radiation and enhance the high-frequency response.

[0074] It should be noted that, in addition to the electromagnetic vibration exciter described in the above embodiments, the sound-generating exciter 6 can also be driven by piezoelectricity to achieve vibration excitation. Some embodiments of the present invention do not limit the specific implementation type and structure of the sound-generating exciter 6, and the specific working principle of the sound-generating exciter 6 is well known to those skilled in the art and will not be elaborated here. Furthermore, Figure 5 The distribution of the sound exciter 6 in the display device is shown only as an example. Some embodiments of the present invention do not specifically limit the distribution of the sound exciter 6 in the display device, and the distribution of the sound exciter 6 can be specifically set according to the sound requirements of the display device.

[0075] Therefore, some embodiments of the present invention utilize the sound-emitting plate 5 and the sealed air cavity with viscous internal air, so that the sound-emitting exciter 6 can transmit vibrations to the front panel of the liquid crystal display panel 1 in sequence through the sound-emitting plate 5, the backlight module 2, and the sealed air cavity 4, causing the liquid crystal display panel 1 to vibrate and produce sound. Since the vibration output terminal 7 of the sound-emitting exciter 6 is fixed to the surface of the sound-emitting plate 5 away from the backlight module 2, the setting of the sound-emitting exciter 6 does not affect the display of the display device, making it possible for traditional liquid crystal screens to produce sound, bringing users an integrated audio-visual experience where sound comes from images, and overcoming the industry bottleneck problem that it is difficult to achieve sound production from liquid crystal display screens.

[0076] In some embodiments, Figure 11 This is a top view schematic diagram of a backlight module according to an exemplary embodiment of the present invention. Figure 12 The invention is illustrated in an exemplary embodiment along the [path]. Figure 11 A schematic diagram of the cross-sectional structure along the BB' direction. (Combined with...) Figure 6 to Figure 8 as well as Figure 11 to Figure 12 The sound-emitting plate 5 is connected to the first viscous buffer structure ( Figure 12 (Not shown in the image) is fixed to the backlight module 2.

[0077] In some embodiments, to meet the requirements of display device processing yield and cost, the backlight module 2 in the display device may include multiple back plates 30. These back plates 30 are evenly arranged and spliced ​​to form the backlight module 2. Both the sound-emitting plate 5 and the back plates 30 can be rectangular flat panels. The first adhesive buffer structure can be double-sided tape. The back plates 30 are evenly arranged and attached to the sound-emitting plate 5 through the first adhesive buffer structure. The sound-emitting plate 5 connects adjacent back plates 30 to form a single, continuous plate with tight seams between them. Furthermore, the first adhesive buffer structure also acts as a buffer between the sound-emitting plate 5 and the backlight module 2, preventing noise from the two colliding during vibration and affecting the display effect of the display device.

[0078] In some embodiments, combined with Figure 7 and Figure 8 The vibration output terminal 7 is connected via a second viscous buffer structure ( Figure 7 and Figure 8(Not shown) is fixed to the sound-emitting plate 5. In some embodiments, the vibration output terminal 7 can also be in direct contact with the sound-emitting plate 5, which can also drive the sound-emitting plate 5 to vibrate. However, this will cause the vibration output terminal 7 to detach from the sound-emitting plate 5 when the sound-emitting exciter 6 vibrates downward, thus failing to excite the liquid crystal display panel 1 to emit sound. When the sound-emitting exciter 6 vibrates upward, it will cause a hard collision with the sound-emitting plate 5, generating noise. In some embodiments of the present invention, the vibration output terminal 7 is fixed to the sound-emitting plate 5 by a second adhesive buffer structure, such as double-sided tape. This solves the problems of the vibration output terminal 7 detaching from the sound-emitting plate 5 when the sound-emitting exciter 6 vibrates downward, thus failing to excite the liquid crystal display panel 1 to emit sound, and the hard collision between the sound-emitting exciter 6 and the sound-emitting plate 5 generating noise when the sound-emitting exciter 6 vibrates upward.

[0079] In some embodiments, Figure 13 This is an exploded structural diagram of a display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 6 to Figure 8 as well as Figure 13 The liquid crystal display panel 1 includes a liquid crystal film layer 10 and an optical diffusion film layer 11. The liquid crystal film layer 10 is the display film layer. A first annular sealing structure 12 is provided between the liquid crystal film layer 10 and the optical diffusion film layer 11 at the position corresponding to the edge of the liquid crystal display panel 1. The liquid crystal film layer 10 and the optical diffusion film layer 11 form an air cavity 3 through the first annular sealing structure 12.

[0080] In some embodiments, the first annular sealing structure 12 can be, for example, an optical adhesive. The first annular sealing structure 12 makes the air in the air gap of the air cavity 3 viscous. The sound exciter 6 is used to excite the sound-emitting plate 5 to vibrate through the vibration output terminal 7, thereby driving the backlight module 2 to vibrate. Thus, some embodiments of the present invention utilize optical adhesive to achieve a fully laminated structure of the liquid crystal display panel 1. The optical diffusion film layer 11 may include an optical film and a diffusion plate. The display structure and corresponding working principle of the liquid crystal display panel 1 are well known to those skilled in the art and will not be described in detail here. By using optical adhesive to bond the liquid crystal film layer 10, the optical film, and the diffusion plate, the multi-layer film structure becomes a component, equivalent to a single-layer screen, so that the vibration generated by the sound exciter 6 can be transmitted to the front of the liquid crystal display panel 1 through the fully laminated structure. Exemplarily, the materials constituting the diffusion plate include, but are not limited to, lightweight transparent organic sheets such as glass, acrylic, or polycarbonate.

[0081] It should be noted that the optical diffusion film layer 11 may include an optical film and a diffusion plate, with the optical film located on the side of the diffusion plate adjacent to the liquid crystal film layer 10. Figure 6An air cavity is formed, for example, between the optical film and the liquid crystal film 10; alternatively, an air cavity may be formed between the optical film and the diffuser plate; or air cavities may be formed between both the optical film and the liquid crystal film 10 and between the optical film and the diffuser plate. Furthermore, a portion of the bezel corresponding to the display device may be positioned such that both the optical film and the diffuser plate are in contact with the mid-frame structure 37, for example... Figure 6 At the right edge of the frame, the optical film and diffuser are both in contact with the frame structure 37. At the other edges, the optical film and diffuser are suspended relative to the frame structure 37, for example... Figure 6 The optical film and diffuser plate are suspended relative to the middle frame structure 37 at the left side edge position.

[0082] Therefore, the aforementioned air cavity, through its suspended position, for example... Figure 6 At the left edge of the screen, an air cavity is formed between the backplate 30 and the diffuser plate to create a sealed air cavity 4 between the backlight module 2 and the liquid crystal display panel 1. This allows sound from the sound-emitting plate to be transmitted to the front of the display panel, thus enabling the screen to emit sound. Specifically, the sealed air cavity 4 includes the air cavity between the backplate 30 and the diffuser plate, as well as the air cavity between the optical film and the liquid crystal film layer 10, or the air cavity between the optical film and the diffuser plate.

[0083] Alternatively, no air cavity can be formed between the optical film and the liquid crystal film 10, or between the optical film and the diffuser plate. That is, the optical film and the liquid crystal film 10 are in direct contact, and the optical film and the diffuser plate are in direct contact. In this case, the sealed air cavity 4 includes the air cavity between the back plate 30 and the diffuser plate, and also includes the suspended position, for example... Figure 6 The air gap at the left side of the frame connects to form a sealed air cavity.

[0084] In some embodiments, Figure 14 This is a three-dimensional structural schematic diagram of another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 6 to Figure 8 as well as Figure 13 and Figure 14 A second annular sealing structure 13 is provided between the backlight module 2 and the liquid crystal display panel 1 at the position corresponding to the edge of the liquid crystal display panel 1. The backlight module 2 and the liquid crystal display panel 1 form a sealed air cavity 4 through the second annular sealing structure 13.

[0085] In some embodiments, the second annular sealing structure 13 may be, for example, an optical adhesive. The second annular sealing structure 13 is positioned around the bezel of the liquid crystal display panel 1, making the air in the air gap of the sealed air cavity 4 viscous. The sound exciter 6 is used to excite the sound-emitting plate 5 to vibrate via the vibration output terminal 7, thereby driving the backlight module 2 to vibrate. Exemplarily, the maximum height of the air gap formed by the sealed air cavity 4 can be 10 mm, but it can also be, for example, 1 mm. Alternatively, the first annular sealing structure 12 may also be positioned similarly to the second annular sealing structure 13, surrounding the bezel of the liquid crystal display panel 1.

[0086] Therefore, by circumventing the stacked structure for sound generation in the display device described in some embodiments of the present invention, especially by circumventing the airtight layer between the liquid crystal display panel 1 and the backlight module 2, the effect of coupling vibration to the liquid crystal display panel 1 to achieve sound generation will be either unattainable or severely reduced. Similarly, circumventing the fully laminated structure inside the liquid crystal display panel 1 will severely reduce the vibration transmission effect and affect the low, mid, and high frequency response of the display device.

[0087] In some embodiments, the backlight module 2 includes a MiniLED light-emitting structure. In some embodiments, the MiniLED light-emitting structure is small in size. By including the MiniLED light-emitting structure in the backlight module 2, the air gap between the liquid crystal display panel 1 and the backlight module 2 can be effectively reduced. The air in the air gap is made viscous by sealing the liquid crystal display panel 1 and the backlight module 2 around them. The sealed air gap is equivalent to a damping spring between the liquid crystal display panel 1 and the backlight module 2, which transmits the vibration force of the sound exciter 6 that vibrates the backlight module 2 to the liquid crystal display panel 1 to generate sound.

[0088] It should be noted that the backlight module 2 may include multiple backplates 30, i.e., lamp panels, or multiple lamp strips; some embodiments of the present invention do not specifically limit this. The backlight module 2 is not limited to including a MiniLED light-emitting structure; other self-emissive structures may also be used as the backlight module 2.

[0089] Figure 15 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 16 This is a three-dimensional structural schematic diagram of another display device according to an exemplary embodiment of the present invention. Based on the above embodiments, and in conjunction with… Figure 15 and Figure 16 The display device also includes multiple elastic support members 17, which are interference-fitted between the first structure and the liquid crystal display panel 1. The first structure is a backlight module 2 or a sound-emitting plate 5, for example... Figure 15 and Figure 16The backlight module 2 includes multiple light-emitting structures 18 on the side adjacent to the liquid crystal display panel 1, and the elastic support 17 may be located between the light-emitting structures 18.

[0090] In some embodiments, problems exist in the vibration transmission process of the sound-generating exciter 6. The thickness of the air gap between the liquid crystal display panel 1 and the backlight module 2 varies significantly due to material tolerances, assembly process tolerances, and their own gravity, resulting in inconsistent vibration transmission efficiency. Furthermore, the close contact between the liquid crystal display panel 1 and the backlight module 2 leads to vibration noise and abrasion. To avoid these risks, some embodiments of the present invention add an elastic support member 17 between the liquid crystal display panel 1 and the backlight module 2. The elastic support member 17 has the following characteristics: one side contacts the liquid crystal display panel 1, and the other side contacts the backlight module 2. One or both sides are connected to the contact positions by mechanical structures or adhesive methods. The elastic support member 17 can be, for example, a high-resilience material or a combination of materials with resilience, such as silicone. The elastic support member 17 ensures the stability of the air gap size between the liquid crystal display panel 1 and the backlight module 2, avoiding abnormal collision noise between the liquid crystal display panel 1 and the backlight module 2. Moreover, the solid elastic support member 17 improves the vibration transmission efficiency from the backlight module 2 to the liquid crystal display panel 1. Additionally, Figure 16 Position 'a' in the middle can be tape.

[0091] In some embodiments, the elastic support 17 is interference-fitted between the backlight module 2 and the liquid crystal display panel 1, that is, the connection between the elastic support 17 and the liquid crystal display panel 1 and the backlight module 2 on both sides can adopt a dimensional interference fit design, that is, the size of the elastic support 17 is larger than the height design size between the liquid crystal display panel 1 and the backlight module 2. Figure 17 This is a cross-sectional structural schematic diagram of another display device according to an exemplary embodiment of the present invention. When the oscillator of the corresponding sound exciter 6 vibrates backward, the elastic support 17 is in a free contact state. Figure 18 This is a cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention. When the sound exciter 6 is not vibrating and the elastic support 17 is in a static position, the elastic support 17 is in an interference compression state due to the pressure between the liquid crystal display panel 1 and the backlight module 2. Figure 19 This is a cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention. When the vibrator of the corresponding sound exciter 6 is pushed forward, the elastic support 17 is in a further overpressure state. The size of the elastic support 17 can be, for example, the sum of the distance between the liquid crystal display panel 1 and the backlight module 2 and half of the vibration amplitude of the vibrator, ensuring... Figure 17 In the indicated state, the elastic support 17 is in contact with both the liquid crystal display panel 1 and the backlight module 2, which improves the transmission efficiency of vibration from the backlight module 2 to the liquid crystal display panel 1.

[0092] In some embodiments, combined with Figure 17 to Figure 19 The elastic support 17 can be fixed to a first structure, such as the backlight module 2, via a first adhesive structure 19, for example, double-sided adhesive. Alternatively, Figure 20 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention, as shown below. Figure 20 As shown, the elastic support 17 can also be positioned adjacent to the first structure. For example, a welding structure 20 can be provided on one side of the backlight module 2, and the elastic support 17 can be welded and fixed to the first structure, such as the position 67 where the backlight module 2 is located, through the welding structure 20. In some embodiments, the elastic support 17 can be injection molded, mechanically fitted, or bonded with a metal structure that is easy to weld. This welding structure 20 can be fixedly connected to the back plate 30 of the backlight module 2 by welding, thereby achieving the purpose of fixing the elastic support 17. This method can make the elastic support 17 firmly installed and is conducive to batch automatic assembly.

[0093] Furthermore, the elastic support 17 can be made of elastic materials such as silicone rubber. However, elastic materials are susceptible to temperature-induced changes in hardness. When the display device operates, internal temperature variations cause changes in the hardness of the elastic support 17, thus affecting its supporting and vibration transmission optimization functions. Figure 20 As shown, optimization can be achieved through a dual-material composite approach. The elastic material part ensures vibration buffering, while the non-elastic material part, namely the welded structure 20, ensures that the vibration transmission effect does not change with temperature.

[0094] In some embodiments, Figure 21 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 21 As shown, the elastic support member 17 can also be provided with suction cup structures at both ends, and the elastic support member 17 can be fixed to the first structure, such as the backlight module 2 and the liquid crystal display panel 1, respectively through the suction cup structures at both ends. Figure 22 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 22 As shown, one end of the elastic support 17 can be fixed to the first structure, such as the backlight module 2, via a first adhesive structure 19, such as double-sided adhesive. The other end of the elastic support 17 is provided with a suction cup structure, and the elastic support 17 is fixed to the liquid crystal display panel 1 via the suction cup structure. Thus, the elastic support 17 can be fixed by double-sided adhesive or by mechanical structure, thereby realizing the vibration linkage between the backlight module 2 and the liquid crystal display panel 1 and improving the vibration transmission efficiency. However, double-sided adhesive or mechanical structure fixation has the disadvantage of complex process implementation. The suction cup adsorption scheme can improve the feasibility of the solution.

[0095] In some embodiments,Figure 23 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 24 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 23 and Figure 24 The first structure can also be a sound-emitting plate 5, and the elastic support member 17 is interference-fitted between the sound-emitting plate 5 and the liquid crystal display panel 1. The backlight module 2 includes multiple light-emitting structures 18 on the side adjacent to the liquid crystal display panel 1, and the elastic support member 17 is located between the light-emitting structures 18.

[0096] In some embodiments, such as Figure 23 As shown, a fixing plate 22 can be provided on the side of the backlight module 2 adjacent to the liquid crystal display panel 1. The fixing plate 22 has multiple locking holes 23, and the backlight module 2 has multiple through mounting holes 24. The locking holes 23 are used to fix the elastic support member 17 in the through mounting holes 24 and on the sound-emitting plate 5; or, as shown Figure 24 As shown, the backlight module 2 includes multiple countersunk holes 25, which are used to fix the elastic support 17 to the sound-emitting plate 5.

[0097] In some embodiments, the adhesive layer between the elastic support 17 and the backlight module 2 is prone to detachment after prolonged vibration, and the assembly process is cumbersome. Some embodiments of the present invention, for example... Figure 23 As shown, the backlight module 2 has mounting holes 24 at the mounting positions of the elastic support member 17. An adhesive layer is applied to the bottom of the backlight module 2 and the surface of the sound-emitting plate 5, with the bottom surface of the elastic support member 17 bonded to the adhesive layer. A fixing plate 22 is added to the surface of the backlight module 2. The fixing plate 22 has openings, and the top of the elastic support member 17 protrudes. The bottom cross-sectional area of ​​the elastic support member 17 is larger than its top cross-sectional area, and the corresponding opening size of the fixing plate 22 is smaller than the bottom area of ​​the elastic support member 17. This structure fixes the elastic support member 17 to the backlight module 2, preventing it from falling off. Alternatively, as... Figure 24 As shown, the backlight module 2 has a countersunk hole 25 added at the mounting position of the elastic support 17, which makes it easier to fix the elastic support 17. It should be noted that this design can also be used as a reference. Figure 23 and Figure 24 The fixed elastic support 17 of the structure shown adopts a similar structure for fixing the elastic support 17, and some embodiments of the present invention do not specifically limit this. It should be noted that when the first structure is a sound-emitting plate 5, the fixing method of the elastic support 17 to the sound-emitting plate 5 and the liquid crystal display panel 1 located on both sides thereon can also refer to the above. Figure 17 to Figure 22 The fixed method will not be elaborated here.

[0098] For example, combined Figure 15 to Figure 24The elastic support 17 can be, for example, conical or cylindrical, or it can be set in a similar shape. Figure 16 As shown in the figure, for example, the cross-sectional area of ​​the portion of the elastic support 17 adjacent to the liquid crystal display panel 1 can be set to be smaller than the cross-sectional area of ​​the portion of the elastic support 17 adjacent to the backlight module 2.

[0099] In addition, the elastic support 17 is positioned within the illumination range of the light-emitting structure 18 on the backlight module 2. The shape design of the elastic support 17 needs to consider the problem of local bright spots or dark spots caused by light refraction when the light-emitting structure 18 emits light. To avoid local display problems caused by light refraction, the elastic support 17 can, for example, be placed at equal intervals with the four surrounding light-emitting structures 18 and adopt a conical or tetrahedral design. When the elastic support 17 is designed as a tetrahedron, the off-axis angle between each face of the elastic support 17 and the corresponding light-emitting structure 18 can, for example, be the same.

[0100] In some embodiments, Figure 25 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 25 As shown, the elastic support members 17 are distributed in multiple rings around the sound exciter 6, and the distribution density of the elastic support members 17 decreases along the direction away from the sound exciter 6. In some embodiments, the number of elastic support members 17 installed is relatively large, which affects the difficulty of process assembly. Based on this, some embodiments of the present invention propose an optimization scheme for the number of elastic support members 17 while ensuring vibration buffering and vibration transmission effects. The elastic support members 17 are arranged non-uniformly according to the distance from the installation position of the sound exciter 6. The vibration is most intense at the sound exciter 6, and the arrangement density of the elastic support members 17 is the largest. The vibration amplitude is smaller at the position away from the sound exciter 6, and the arrangement density of the elastic support members 17 is reduced. This ensures that the vibration buffering and vibration transmission effects in the entire display device area are relatively uniform, and optimizes the number of elastic support members 17, which is beneficial to reducing the implementation cost of the display device and the difficulty of process assembly.

[0101] In some embodiments, Figure 26 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 26 As shown, the support strength of the elastic support 17 decreases in the direction away from the sound exciter 6; and / or, the height of the elastic support 17 decreases in the direction away from the sound exciter 6. Figure 26Different levels of grayscale are used to represent the differences in the support strength or height of the elastic support member 17. The higher the grayscale, the darker the fill color, and the greater the support strength or height of the elastic support member 17; the lower the grayscale, the lighter the fill color, and the smaller the support strength or height of the elastic support member 17. For example, the above settings can be applied only to the support strength of the elastic support member 17, only to the height of the elastic support member 17, or both the support strength and height of the elastic support member 17 can be set in the above manner.

[0102] In some embodiments, elastic supports 17 with different hardness or size are provided according to the distance between the elastic support 17 and the installation area of ​​the sound exciter 6, so as to achieve the effect that the support strength of the elastic support 17 is inversely proportional to the distance of the sound exciter 6. That is, the closer to the sound exciter 6, the greater the support strength of the elastic support 17, and the farther away from the sound exciter 6, the smaller the support strength of the elastic support 17. This realizes that the elastic support 17 is arranged according to the vibration amplitude, thereby further optimizing the uniformity of vibration buffering and vibration transmission effect in the entire display device area. On the other hand, the interference fit of the elastic support 17 can be adjusted according to its position relative to the sound exciter 6. That is, the height of the elastic support 17 near the sound exciter 6 is set to be greater than the height of the elastic support 17 far from the sound exciter 6, so that the vibration transmission efficiency is highest near the sound exciter 6. This avoids the assembly tolerance of the elastic support 17 far from the sound exciter 6, which would lead to a non-interference fit of the elastic support 17 near the sound exciter 6. In other words, it ensures that the upper and lower surfaces of the elastic support 17 at each position in the area where the corresponding display device is located do not detach from the liquid crystal display panel 1 and the backlight module 2 when vibrating, thus optimizing the vibration transmission efficiency of the elastic support 17 at each position.

[0103] In some embodiments, Figure 27 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 28 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 29 This invention illustrates an example of a method along... Figure 27 A schematic diagram of the cross-sectional structure along the CC' direction. (Combined with...) Figure 27 to Figure 29 The backlight module 2 includes multiple back plates 30, and a first buffer structure 31 is provided between adjacent back plates 30. The first buffer structure 31 is located on the sound-emitting plate 5 and is used to separate adjacent back plates 30.

[0104] In some embodiments, when multiple backplates 30 are assembled, the edges of adjacent backplates 30 may overlap, which can easily lead to abnormal vibration noise during vibration, such as... Figure 27As shown, in some embodiments of the present invention, a first buffer structure 31 is provided between adjacent back plates 30. The first buffer structure 31 is located on the sound-emitting plate 5 and is used to space adjacent back plates 30. The first buffer structure 31 is, for example, an elastic colloid structure. The first buffer structure 31 can be installed in the gap between each back plate 30 to increase vibration buffering between the edges of the back plates 30 and avoid abnormal vibration. In addition, as Figure 28 As shown, the junction between four adjacent back plates 30 is also prone to vibration noise due to the overlap of the back plate 30 areas. The first buffer structure 31 can be set at the junction between four adjacent back plates 30 to increase the vibration buffer at the junction of the back plates 30 and avoid abnormal vibration.

[0105] In some embodiments, combined with Figure 27 and Figure 29 The first buffer structure 31 can be strip-shaped, and it connects multiple elastic support members 17 into one piece, that is, the first buffer structure 31 and the multiple elastic support members 17 are integrally formed. In some embodiments, the number of elastic support members 17 is large, which presents a problem of complex manufacturing process. To optimize this problem, some embodiments of the present invention connect the elastic support members 17 into one piece through the first buffer structure 31. For example, the first buffer structure 31 and the corresponding elastic support member 17 can be integrally formed, effectively reducing the installation difficulty of the elastic support members 17. In some embodiments, when the first structure is a backlight module 2, the arrangement relationship between the first buffer structure 31 and the elastic support members 17 is as follows: Figure 29 As shown, when the first structure is a sound-emitting plate 5, the first buffer structure 31 and the elastic support member 17 are simultaneously disposed on the sound-emitting plate 5 and the first buffer structure 31 and the elastic support member 17 are integrally formed.

[0106] Figure 30 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 30 As shown, the backlight module 2 includes multiple light-emitting structures 18 on the side adjacent to the liquid crystal display panel 1. An elastic support 17 is provided on each light-emitting structure 18, and the elastic support 17 is a light-guiding elastic support. The first structure is the backlight module 2. In some embodiments, the light-emitting structure 18 is, for example, a MiniLED. The elastic support 17 can be implemented by setting light guides or light-guiding adhesive dots at the positions of the light-emitting structures 18. This allows the elastic support 17 to be mounted on the backlight module 2 by welding the light-emitting structure 18 to the back plate 30 in the backlight module 2, which is beneficial for improving assembly efficiency. Referring to the above embodiments, some embodiments of the present invention utilize an elastic support 17 with light-guiding properties to avoid abnormal collision noise in the liquid crystal display device without affecting the luminous efficiency of the light-emitting structure 18, thereby improving the vibration transmission efficiency in the area between the sound-emitting plate 5 and the liquid crystal display panel 1.

[0107] In some embodiments, Figure 31 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 31 As shown, the elastic support 17 can be configured as a multifunctional elastic diffuser plate bracket, that is, the elastic support 17 can replace the lens and diffuser plate bracket in the backlight. The elastic support 17 can effectively support the liquid crystal display panel 1 by contacting the diffuser plate in the optical diffuser film layer 11. In the direction away from the back plate 30, the area of ​​the cross section of the elastic support 17 parallel to the liquid crystal display panel 1 increases, so that the elastic support 17 has a uniform light effect on the light emitted by the light-emitting structure 18, and can make the uneven light intensity of the light-emitting structure 18 uniformly distributed.

[0108] In some embodiments, such as Figure 31 As shown, the elastic support 17 can have multiple bubble structures inside, and the distribution density of the bubble structures decreases along the direction away from the first central axis YY'; and / or, the elastic support 17 can be filled with multiple light-guiding particles, and the distribution density of the light-guiding particles decreases along the direction away from the first central axis YY'; wherein, the first central axis YY' is the longitudinal central axis of the elastic support 17 perpendicular to the liquid crystal display panel 1, that is, the elastic support 17 can be configured to have multiple bubble structures inside, and the distribution density of the bubble structures decreases along the direction away from the first central axis YY', or the elastic support 17 can be filled with multiple light-guiding particles inside, and the distribution density of the light-guiding particles decreases along the direction away from the first central axis YY', or the elastic support 17 can be configured to have multiple bubble structures and multiple light-guiding particles inside, and the distribution density of the bubble structures and the light-guiding particles decreases along the direction away from the first central axis YY'.

[0109] In some embodiments, the elastic support 17 can be a silicone material with a set transparency. Multiple bubble structures or light-guiding particles such as silica particles can be provided in the elastic support 17. Along the direction parallel to the plane of the liquid crystal display panel 1, the distribution density of the bubble structures or light-guiding particles such as silica particles gradually decreases along the direction away from the longitudinal central axis of the elastic support 17. By utilizing the bubble structures or light-guiding particles with the above distribution pattern in combination with the shape of the elastic support 17, the elastic support 17 can have a uniform light distribution effect on the light emitted by the light-emitting structure 18, which can make the uneven light intensity of the light-emitting structure 18 uniformly distributed, which is beneficial to optimizing the display effect of the display device.

[0110] In some embodiments, the surface of the elastic support 17 is covered with a reflective film layer or coated with a reflective material. In some embodiments, the elastic support 17 also has a light control effect. In local dimming display mode, the surface of the elastic support 17 is covered with a reflective film layer or coated with a reflective material, so that light emitted from different light control areas is reflected off the surface of the elastic support 17 in other control areas, reducing the mutual influence of light between different light control areas and thus avoiding light interference between different local dimming display areas. For example, Figure 31 The backlight module 30 in the structure shown can be either a light panel or a light strip, and some embodiments of the present invention do not limit this.

[0111] In some embodiments, Figure 32 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 6 and Figure 32 The liquid crystal display panel 1 includes a liquid crystal film layer 10 and an optical diffusion film layer 11. The liquid crystal film layer 10 is located on the side of the optical diffusion film layer 11 away from the backlight module 30. The optical diffusion film layer 11 includes an optical film 27 and a diffuser plate 28. The diffuser plate 28 is located on the side of the optical film 27 away from the liquid crystal film layer 10. A multifunctional optical adhesive structure 29 is disposed between the optical film 27 and the diffuser plate 28. The multifunctional optical adhesive structure 29 includes a convex lens structure and / or a large-angle filter film layer. In some embodiments, if the diffuser plate 28 is in direct contact with the optical film 27, it will cause abrasion between the optical film 27 and the diffuser plate 28, affecting the normal function of the optical film 27 and the diffuser plate 28, and thus affecting the display effect of the display device. The present invention effectively prevents abrasion of the optical film 27 and the diffuser plate 28 by distributing a multifunctional optical adhesive structure 29 between the optical film 27 and the diffuser plate 28, for example, by uniformly distributing multiple multifunctional optical adhesive structures 29 in multiple local areas between the optical film 27 and the diffuser plate 28.

[0112] In some embodiments, such as Figure 32 As shown, the multifunctional optical adhesive structure 29 includes a convex lens structure 291, which protrudes away from the diffuser plate 28. In some embodiments, after the optical film 27 and the diffuser plate 28 are bonded together, the emitted light from the liquid crystal display panel 1 side is more dispersed, resulting in a larger viewing angle of the display device, which in turn reduces the luminous brightness of the light-emitting structure 18 and affects the display effect. In this invention, the convex lens structure 291 is used to converge the light emitted by the light-emitting structure 18. The convex lens structure 291 has the effect of narrowing the viewing angle, effectively solving the problem of reduced luminous brightness of the light-emitting structure 18 due to the increased viewing angle after the optical film 27 and the diffuser plate 28 are bonded together, and optimizing the display effect of the display device.

[0113] In some embodiments, such as Figure 32 As shown, the multifunctional optical adhesive structure 29 includes a large-angle filter film 292, which is located on the side of the convex lens structure 291 adjacent to the diffuser plate 28. The large-angle filter film 292 is used to filter out the first light rays irradiated by the light-emitting structure 18 onto the large-angle filter film 292; wherein, the incident angle of the first light rays relative to the large-angle filter film 292 is greater than a preset angle. In some embodiments, when light rays with an incident angle greater than the preset angle relative to the large-angle filter film 292 irradiate the large-angle filter film 292, this portion of the light rays will be reflected back to the side where the light-emitting structure 18 is located at the large-angle filter film 292, that is, this portion of the light rays will not be emitted on the display side, thereby forming an optical barrier between the optical film 27 and the diffuser plate 28, reducing the influence between local dimming dynamic areas. Exemplarily, the large-angle filter film 292 can be attached to the diffuser plate 28 by an adhesive layer 293. For example, a local dimming dynamic area can be configured with a corresponding multifunctional optical adhesive structure 29, and the multifunctional optical adhesive structure 29 can correspond to one or more light-emitting structures 18. It should be noted that some embodiments of the present invention do not limit the specific angle value of the preset angle, and can set it according to the specific distribution of the local dimming dynamic area.

[0114] In some embodiments, Figure 33 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 34 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 33 and Figure 34 Referring to the above embodiments, in Figure 15 to Figure 24 In addition to the above, the display device also includes a channel isolation structure 32, which is disposed on the backlight module 2 and used to space adjacent sound exciters 6. In some embodiments, the channel isolation structure 32 is, for example, an elastic gel structure. By disposing the channel isolation structure 32 in the regions where different sound exciters 6 are located, i.e., between the channel vibration regions, the speech isolation between each channel is improved, the vibration influence between the vibration regions of each channel is reduced, and the sound effect of the display device is optimized. Figure 33 The middle channel isolation structure 32 is used to separate the left and right sound exciters 6. Figure 34 The device includes three channel isolation structures 32 to separate the areas where the three sound-generating exciters 6 are located. Some embodiments of the present invention can be extended to improve the isolation of more channel vibration areas. Exemplarily, the channel isolation structure 32 can also be implemented using the first buffer structure 31 described in the above embodiments.

[0115] In some embodiments, such as Figure 33 As shown, multiple channel isolation structures 32 are provided between adjacent sound-generating exciters 6. These channel isolation structures 32 connect multiple elastic support members 17 into a single unit; that is, the channel isolation structure 32 and the multiple elastic support members 17 are integrally formed, and the elastic support members 17 on different channel isolation structures 32 are arranged in an alternating pattern. In some embodiments, the number of elastic support members 17 installed is large, which presents a problem of complex manufacturing processes. To optimize this problem, some embodiments of the present invention connect the elastic support members 17 into a single unit via the channel isolation structure 32. For example, the channel isolation structure 32 can be integrally formed with the corresponding elastic support member 17, effectively reducing the installation difficulty of the elastic support members 17. Furthermore, Figure 33 Three channel isolation structures 32 are provided between adjacent sound exciters 6. The elastic supports 17 on the three channel isolation structures 32 are staggered, so that the vibration is effectively attenuated in the channel isolation structures 32, thereby further optimizing the voice isolation between each channel, reducing the vibration influence between the vibration areas of each channel, and optimizing the sound effect of the display device. In some embodiments, when the first structure is a backlight module 2, the channel isolation structure 32 and the elastic supports 17 are simultaneously provided on the backlight module 2 and are integrally formed. When the first structure is a sound-emitting plate 5, the first buffer structure 31 located on the backlight module 2 is integrally formed with the connecting elastic supports 17 through the tip of the connecting elastic supports 17.

[0116] In some embodiments, Figure 35 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 36 This is a top view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 35 and Figure 36 Referring to the above embodiments, in Figure 30 to Figure 32 Based on this, the display device also includes a channel isolation structure 32, which is disposed on the backlight module 2 and used to space adjacent sound exciters 6. The specific working principle of the channel isolation structure 32 can be referred to the aforementioned embodiments. Figure 33 and Figure 34 The description will not be repeated here.

[0117] Figure 37 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 37As shown, based on the above embodiments, the display device further includes a mid-frame structure 37 and a rear shell 39. The mid-frame structure 37 is located on the side of the sound-emitting plate 5 away from the backlight module 2, and at least a portion of the rear shell 39 is located on the side of the mid-frame structure 37 away from the sound-emitting plate 5, and at least a portion of the rear shell 39 is located on the side of the sound-emitting exciter 6 away from the sound-emitting plate 5. In some embodiments, the rear shell 39 is the outer casing of the display device, which may be, for example, but is not limited to, a television.

[0118] In some embodiments, Figure 38 This is a front view structural diagram illustrating another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 37 and Figure 38 An isolation wall 40 is provided between the middle frame structure 37 and the rear shell 39. The isolation wall 40, the rear shell 39 and the middle frame structure 37 form a back-radiating superposition cavity 41. The back-radiating superposition cavity 41 has a sound outlet facing the front or side of the display device.

[0119] In some embodiments, unlike conventional piston-type loudspeakers, the display device of the present invention emits sound in the form of DML (Distributed Loudspeaker) multimodal resonant bending waves, and the sound waves have superposition enhancement. Some embodiments of the display device provided by the present invention have a back-facing high-frequency enhancement design. An isolation wall 40 is provided between the rear shell 39 and the middle frame structure 37 of the display device. The isolation wall 40, the rear shell 39, and the middle frame structure 37 form a back-facing radiation superposition cavity 41 of the desired shape. The back-facing radiation superposition cavity 41 has a sound outlet opening, as shown in... Figure 37 and Figure 38 The image shows the front of the display device's screen. Therefore, by using the back-radiating superimposed cavity 41 to form a sound resonant cavity, the back-vibrating multi-mode high-frequency vibration bending wave is guided to the front of the screen for sound emission, which can improve the response at the resonant frequency to compensate for the high-frequency loss of the display device's sound.

[0120] Figure 39 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. (In conjunction with...) Figure 37 to Figure 39 The length L of the sound path in the back-radiating superposition cavity 41 can be set to the length of N half-wavelengths of sound, where the sound frequency of this wavelength is the lowest resonant frequency of the compensation band, and the sound outlet position can be near any half-wavelength antinode. Additionally, Figure 40 This is a schematic cross-sectional view of another liquid crystal display device according to an exemplary embodiment of the present invention. It can also be viewed as follows: Figure 40 The sound exciter 6 shown is configured to use... Figure 10 The sound exciter 6 shown has a back diaphragm that can radiate additional high-frequency sound waves, further improving the high-frequency response of the display device.

[0121] Figure 41 This is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 42 This is a three-dimensional structural schematic diagram of another display device according to an exemplary embodiment of the present invention. In some embodiments, combined with Figure 41 and Figure 42 By designing the shape of the rear shell 39, the back-radiating superposition cavity 41 can also be configured to have a sound outlet facing the side of the display device. Similarly, the back-radiating superposition cavity 41 can be used to form a sound resonant cavity, guiding the back-vibrating multi-mode high-frequency vibration bending wave to the side of the screen for sound emission, thereby improving the response at the resonant frequency to compensate for the high-frequency loss of the display device's sound. Furthermore, Figure 37 , Figure 40 and Figure 41 The wavy arrow in the image indicates the direction of sound propagation.

[0122] In some embodiments, combined with Figure 37 to Figure 40 The back-radiating superposition cavity 41 has a forward sound outlet facing the front of the display device, and the rear shell 39 covers the bezel of the display device. The gap between the rear shell 39 and the bezel of the display device forms the forward sound outlet 391. In some embodiments, combined with Figure 37 to Figure 40 The back-radiating superposition cavity 41 has a forward sound outlet 391 facing the front of the display device. The rear shell 39 covers the bezel of the display device. The rear shell 39 can be positioned to cover the top, bottom, left, and right bezels of the display device along a direction parallel to the plane of the liquid crystal display sound-emitting device, or it can cover any selectable position of the bezel. Some embodiments of the present invention do not limit this. The gap formed between the rear shell 39 and the bezel of the display device forms the forward sound outlet 391. Thus, the back-radiating superposition cavity 41 constitutes a sound resonant cavity, guiding the backward-vibrating multi-mode high-frequency vibration bending wave to the front of the screen for sound emission, which can improve the response at the resonant frequency to compensate for the high-frequency loss of the display device's sound emission. It should be noted that the forward sound outlet 391 is not limited to... Figure 37 to Figure 40 The structure shown can be implemented using other structures, and some embodiments of the present invention do not specifically limit this.

[0123] In some embodiments, combined with Figure 41 and Figure 42 The back-radiating superposition cavity 41 has a lateral sound outlet 392 facing the side of the display device. The rear shell 39 is located on the side of the middle frame structure 37 away from the sound-emitting plate 5. Along the geometric center of the display device toward the frame of the display device, the distance between the part of the rear shell 39 near the frame of the display device and the middle frame structure 37 gradually decreases. At the frame position of the display device, the gap between the rear shell 39 and the middle frame structure 37 forms the lateral sound outlet 392.

[0124] In some embodiments, combined withFigure 41 and Figure 42 By designing the shape of the rear shell 39, the back-radiating superimposed cavity 41 can also be configured to have a lateral sound outlet 392 facing the display device. The rear shell 39 is located on the side of the middle frame structure 37 away from the sound-emitting plate 5, which can be used as... Figure 41 As shown, along the direction X from the geometric center of the display device toward the display device frame, the distance between the rear shell 39 near the edge of the liquid crystal generating device and the middle frame structure 37 gradually decreases. Furthermore, along the direction X from the geometric center of the display device toward the display device frame, the rear shell 39 gradually converges towards the position near the middle frame structure 37, creating a sound converging effect. Figure 41 The distance d1 is greater than the distance d2. At the bezel of the display device, the gap formed between the back shell 39 and the middle frame structure 37 constitutes a lateral sound outlet 392. Thus, the back-radiating superimposed cavity 41 constitutes a sound resonant cavity, guiding the back-vibrating multi-mode high-frequency vibration bending wave to the side of the screen for sound emission. This can improve the response at the resonant frequency to compensate for the high-frequency loss in the display device's sound emission. It should be noted that the lateral sound outlet 392 is not limited to... Figure 41 to Figure 42 The structure shown can be implemented using other structures, and some embodiments of the present invention do not specifically limit this.

[0125] Figure 43 This is a front view schematic diagram illustrating another display device according to an exemplary embodiment of the present invention. Figure 44 This is a front view structural schematic diagram of another display device according to an exemplary embodiment of the present invention. In some embodiments, combined with Figure 37 to Figure 44 The isolation wall 40 is set perpendicular to the direction of the display device, and the surface of the isolation wall 40 perpendicular to the display device is either flat or curved.

[0126] In some embodiments, combined with Figure 37 to Figure 44 The isolation wall 40 is configured such that its surface perpendicular to the display device is either flat or curved. The isolation wall 40, together with the rear shell 39 and the middle frame structure 37, forms a back-radiating superimposed cavity 41. Using the resonant cavity formed by the back-radiating superimposed cavity 41, the back-vibrating multi-mode high-frequency vibration bending wave is directed to the front or side of the screen for sound emission, thereby improving the response at the resonant frequency to compensate for the high-frequency loss in the display device's sound emission. For example, the surface of the isolation wall 40 perpendicular to the direction of the liquid crystal display device can be, for instance, as shown in the image. Figure 37 to Figure 42 as well as Figure 44 The plane shown, the surface of the isolation wall 40 perpendicular to the direction of the liquid crystal display device can also be as follows: Figure 43 The curved surface shown is also... Figure 43 The surface of the isolation wall 40 shown, which is perpendicular to the direction of the liquid crystal display device, includes both planar and curved portions, although some embodiments of the present invention do not limit this.

[0127] In some embodiments, such as Figure 37 As shown, a sound-insulating buffer structure 76 is provided between the isolation wall 40 and the middle frame structure 37. In some embodiments, during the sound emission process of the display device, since the back-radiating superimposed cavity 41 formed by the middle frame structure 37, the isolation wall 40, and the rear shell 39 constitutes a sound resonant cavity, the vibration of the display device screen will cause the rear shell 39 to vibrate.

[0128] During operation, the middle frame structure 37 and the isolation wall 40 in the back-radiating superposition cavity 41 will also vibrate. Since both the isolation wall 40 and the middle frame structure 37 are rigid structures, they will collide and generate noise during vibration. To eliminate the noise, a sound-insulating buffer structure 76 is provided between the isolation wall 40 and the middle frame structure 37, effectively preventing rigid contact between the isolation wall 40 and the middle frame structure 37, thus avoiding the impact of noise on the sound quality of the display device. The sound-insulating buffer structure 76 can be, for example, sound-insulating sponge or foam, etc., and some embodiments of the present invention do not specifically limit it.

[0129] Figure 45 This is a front view structural schematic diagram of another display device according to an exemplary embodiment of the present invention. In some embodiments, combined with Figure 38 , Figure 42 to Figure 45 Along the direction from the geometric center of the display device toward the sound outlet, the cross-sectional area of ​​the back-radiating superposition cavity 41 perpendicular to the display device gradually increases. In some embodiments, the display device is generally rectangular, and the geometric center of the display device corresponds to the geometric center of the rectangle. Along the direction from the geometric center of the display device toward the sound outlet, the cross-sectional area of ​​the back-radiating superposition cavity 41 perpendicular to the display device gradually increases. That is, the cross-sectional area of ​​the back-radiating superposition cavity 41 near the sound outlet is greater than the cross-sectional area of ​​the back-radiating superposition cavity 41 near the geometric center of the display device. In other words, the back-radiating superposition cavity 41 is set to be horn-shaped. In addition to compensating for the high-frequency loss of the display device's sound output, the forward or side sound output volume of the display device can be further optimized.

[0130] For example, Figure 38 and Figure 42 The two back-radiating superposition cavities 41 shown in the figure and Figure 43 to Figure 45 The back-radiating superposition cavities 41 shown on both the left and right sides satisfy the direction along the geometric center of the display device toward the sound outlet, and the cross-sectional area of ​​the back-radiating superposition cavities 41 perpendicular to the display device gradually increases. Alternatively, a portion of the back-radiating superposition cavities 41 may be configured to satisfy the direction along the geometric center of the display device toward the sound outlet, and the cross-sectional area of ​​the back-radiating superposition cavities 41 perpendicular to the display device gradually increases, for example... Figure 43Of the two back-radiating superimposed cavities 41 shown in the figure, only the upper region of the back-radiating superimposed cavity 41 satisfies the aforementioned cross-sectional area variation law. Figure 45 The intermediate back-radiation superposition cavity 41 shown in the figure only satisfies the aforementioned cross-sectional area variation law in its upper region. That is, some embodiments of the present invention do not limit the entire region of the back-radiation superposition cavity 41 to satisfy the aforementioned cross-sectional area variation law. In addition, when the display device includes multiple back-radiation superposition cavities 41, it is also possible to configure only some of the back-radiation superposition cavities 41 to satisfy the aforementioned cross-sectional area variation law, for example... Figure 44 The upper region of the intermediate back-radiation superposition cavity 41 shown in the figure has a gradually decreasing cross-sectional area perpendicular to the direction of the display device, along the direction from the geometric center of the display device toward the sound outlet.

[0131] Combination Figure 42 to Figure 45 In some embodiments, the display device includes a plurality of back-radiating superimposed cavities 41, at least some of which are symmetrically distributed within the display device. For example... Figure 42 The image shows two back-radiating superimposed cavities 41, which are symmetrically arranged with respect to the vertical center line of the display device. Figure 43 The image shows four back-radiating superposition cavities 41. The two back-radiating superposition cavities 41 on the left and the two back-radiating superposition cavities 41 on the right are symmetrically arranged with respect to the vertical center line of the display device. Figure 44 and Figure 45 The diagram shows three back-radiating superimposed cavities 41, with the left and right back-radiating superimposed cavities 41 symmetrically arranged relative to the vertical centerline of the display device. Thus, the increased number and symmetrical arrangement of the back-radiating superimposed cavities 41 allow sound propagating in multiple directions to pass through the resonant cavities. These resonant cavities guide the back-vibrating multi-mode high-frequency bending waves to the front or side of the screen for sound emission, further compensating for high-frequency losses in the display device's sound output. Furthermore, the symmetrically distributed back-radiating superimposed cavities 41 enhance the sound uniformity of the display device, resulting in good overall sound uniformity.

[0132] As can be seen from the above technical solutions, some embodiments of the present invention make it possible for traditional LCD screens to produce sound, bringing users an integrated audio-visual experience where sound originates from the image, overcoming the industry bottleneck problem of the difficulty in achieving sound production from LCD screens. The use of elastic support components avoids abnormal collision noise and improves vibration transmission efficiency. Furthermore, the back-radiation superimposed cavity formed between the isolation wall, back shell, and middle frame structure guides the back-vibration multi-mode high-frequency vibration bending waves to the front or side of the screen for sound emission, which can improve the response at the resonant frequency to compensate for the high-frequency loss of the display device's sound production.

[0133] It should be noted that some embodiments of the present invention do not limit whether the display device is a flexible display device; some embodiments of the present invention can be applied to curved screens, for example. Furthermore, similar or identical parts between embodiments of the present invention can be referred to mutually, and related content will not be repeated. Moreover, some embodiments of the present invention do not list all possible combinations; any combination of technical features between embodiments of the present invention also falls within the protection scope of the present invention. Feature combinations include, but are not limited to, liquid crystal display panel 1 combined with MiniLED; sound exciter 6 combined with MiniLED; sound exciter 6 combined with MiniLED combined with elastic support member 17; sound exciter 6 combined with sound-emitting plate 5 combined with lamp board; sound exciter 6 combined with sound-emitting plate 5 combined with lamp strip; sound exciter 6 combined with sound-emitting plate 5 combined with lamp board combined with elastic support member 17, and so on, in different embodiments.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

[0135] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various different variations of embodiments suitable for specific application considerations.

Claims

1. A display device, characterized in that, include: Display panel; A backlight module, wherein the backlight module is located on one side of the display panel. A sound-emitting plate, the sound-emitting plate being fixed to the surface of the backlight module away from the display panel; A sound-emitting exciter, wherein the vibration output terminal of the sound-emitting exciter is fixed to the surface of the sound-emitting plate away from the backlight module, and the sound-emitting exciter is used to excite the sound-emitting plate to vibrate through the vibration output terminal to drive the backlight module to vibrate. Multiple elastic support members are provided, which are interference-fitted between the backlight module and the display panel; A fixing plate is disposed on the side of the backlight module facing the display panel. The fixing plate is provided with a locking hole. The backlight module is also provided with a mounting hole that penetrates the backlight module and communicates with the locking hole. One end of the elastic support member near the backlight module is located in the mounting hole. The hole wall of the locking hole is configured to abut against the elastic support member. A mid-frame structure, the mid-frame structure having a back plate portion located on the side of the sound-emitting plate away from the backlight module; The rear shell has a back shell portion located on the side of the back plate portion away from the sound-emitting plate, and the sound-emitting exciter is located between the sound-emitting plate and the back shell portion; An isolation wall is provided between the back plate portion and the back shell portion, and a sound insulation and buffer structure is provided between the isolation wall and the back plate portion; The isolation wall, the rear shell, and the middle frame structure form a back-radiating superimposed cavity, and the back-radiating superimposed cavity has a sound outlet facing the front or side of the display device.

2. The display device according to claim 1, characterized in that, The axis of the locking hole and the axis of the mounting hole are on the same straight line.

3. The display device according to claim 2, characterized in that, The radial dimension of the locking hole is smaller than the radial dimension of the mounting hole.

4. The display device according to any one of claims 1-3, characterized in that, The cross-sectional area of ​​the elastic support member near the backlight module is larger than the cross-sectional area of ​​the elastic support member near the display panel.

5. The display device according to claim 4, characterized in that, The diameter of the locking hole is smaller than the cross-sectional dimension of the end of the elastic support that is furthest from the display panel.

6. The display device according to claim 5, characterized in that, An adhesive layer is provided on the surface of the sound-emitting plate facing the elastic support member, and the end of the elastic support member facing the sound-emitting plate is bonded to the sound-emitting plate through the adhesive layer.

7. The display device according to claim 6, characterized in that, The sound insulation and buffer structure is either sound-insulating sponge or foam.

8. The display device according to claim 7, characterized in that, The back-radiating superposition cavity has a forward sound outlet facing the front of the display device, and the rear shell covers the frame of the display device. The gap between the rear shell and the frame of the display device constitutes the forward sound outlet.

9. The display device according to claim 7, characterized in that, The back-radiating superposition cavity has a lateral sound outlet facing the side of the display device, and the rear shell is located on the side of the middle frame structure away from the sound-emitting plate; Along the direction from the geometric center of the display device toward the frame of the display device, the distance from the portion of the rear shell adjacent to the frame of the display device to the mid-frame structure gradually decreases; At the bezel position of the display device, the gap between the rear shell and the middle frame structure forms the lateral sound outlet.

10. The display device according to claim 7, characterized in that, Along the direction from the geometric center of the display device toward the sound outlet, the cross-sectional area of ​​the back-radiating superposition cavity perpendicular to the direction of the display device gradually increases.

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