Display devices

Abstract

The present invention discloses a display device, comprising: a display panel, a backlight module, a sounding board, a sounding exciter, multiple elastic support members, and a rear housing. Multiple high-frequency speakers are provided on the frame of the display device, and the high-frequency speakers are symmetrically distributed about the central axis of the display device. The backlight module and the display panel form a sealed air cavity. The sounding board is fixed to the surface of the backlight module away from the display panel, and the sounding exciter excites the sounding board to vibrate, thereby driving the backlight module to vibrate. The elastic support member is interferingly disposed between the backlight module and the display panel. The first structure is the backlight module or the sounding board. Some embodiments of the present invention overcome the industry bottleneck problem of the difficulty in achieving sound generation in liquid crystal display screens, and improve the sound generation effect and vibration transmission efficiency of the display device in the high-frequency band.

Description

[0001] The present invention claims priority to Chinese patent application number 202210281470.4 filed on March 21, 2022, entitled “LIQUID CRYSTAL SOUND-EMITTING DISPLAY DEVICE,” the entire contents of which are incorporated herein by reference.

[0002] The present invention claims priority to Chinese patent application number 202210279174.0, filed on March 21, 2022, and entitled “DISPLAY DEVICE,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of display technology, and more particularly to a display device. Background Art

[0004] The speakers in display devices, such as televisions, are limited by their ultra-thin design and installation location. They are generally small in size and are forced to use bottom-firing or rear-firing methods. The resulting sound and image positions are separated from the image positions, resulting in a poor viewing experience and an inability to provide an audio-visual experience that integrates sound and image.

[0005] In theory, any flat-panel display device can generate sound waves as long as it can directly vibrate the display panel via a sound-generating actuator. For example, OLED (Organic Light-Emitting Diode) screens have already achieved self-sounding technology, where the OLED panel acts as both a display and a speaker diaphragm to produce a unified audiovisual effect. However, when the display panel is an LCD (Liquid Crystal Display), the LCD panel has many independent and stacked layers, and a uniform backlight source is required behind the display panel. The backlight source cannot be blocked, so it is impossible to install a sound-generating actuator on the panel. Furthermore, there is a large distance between the backlight source and the display panel, and there is no path to effectively transmit the vibrations to the LCD panel. These bottlenecks have resulted in no solution to generate sound in LCD screens to date. Summary of the Invention

[0006] In order to solve the problems described in the above background technology, some embodiments of the present invention provide a display device that overcomes the industry bottleneck problem of the difficulty in achieving sound production of liquid crystal display screens, and improves the sound effect and vibration transmission efficiency of the display device in the high-frequency band.

[0007] The present invention provides a display device, comprising:

[0008] Display panel, backlight module, sound board, sound exciter, multiple elastic support members and rear shell;

[0009] The backlight module is located on one side of the display panel, the backlight module and the display panel form a sealed air cavity, and the sound plate is fixed to the surface of the backlight module away from the display panel;

[0010] The vibration output terminal of the sound exciter is fixed to the surface of the sound plate away from the backlight module, and the sound exciter is used to excite the sound plate to vibrate through the vibration output terminal to drive the backlight module to vibrate;

[0011] The elastic support member is interference-connectedly arranged between the backlight module and the display panel;

[0012] A plurality of high-frequency speakers are provided on the frame of the display device, and the high-frequency speakers are symmetrically distributed about the central axis of the display device.

[0013] It can be seen from the above technical solutions that some embodiments of the present invention utilize a sounding board and a sealed air cavity with viscous air inside, so that the sound exciter can transmit vibrations to the liquid crystal display panel through the sounding board, the backlight module, and the sealed air cavity in sequence, causing the liquid crystal display panel to vibrate and make sounds. Moreover, since the vibration output terminal of the sounding exciter is fixed to the surface of the sounding board away from the backlight module, the setting of the sounding exciter does not affect the display of the display device, making it possible for traditional liquid crystal screens to make sounds, and providing users with an integrated audio-visual experience of sound and picture where the sound comes from the image, overcoming the industry bottleneck problem of the difficulty of achieving sound on liquid crystal display screens. In addition, the use of multiple high-frequency speakers arranged on the frame of the display device makes up for the lack of high-frequency sound effects of the display device, effectively improving the sound effects of the high-frequency band of the display device, and is conducive to achieving full-band sound effects of the display device. In addition, the use of elastic support members avoids abnormal collision noise and improves the efficiency of vibration transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 is a schematic diagram illustrating an operation scenario between a display device and a control apparatus according to an exemplary embodiment of the present invention;

[0016] Figure 2 is a configuration block diagram of a control device according to an exemplary embodiment of the present invention;

[0017] Figure 3 is a block diagram showing a configuration of a display device according to an exemplary embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of an interface of a video-on-demand program according to an exemplary embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of a three-dimensional structure of a display device according to an exemplary embodiment of the present invention;

[0020] Figure 6 The present invention is a method according to an exemplary embodiment of the present invention. Figure 5 Schematic diagram of the cross-sectional structure in the AA' direction;

[0021] Figure 7 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0022] Figure 8 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0023] Figure 9 is a schematic diagram of a three-dimensional structure of a sound exciter according to an exemplary embodiment of the present invention;

[0024] Figure 10 is a schematic cross-sectional structure diagram of a sound exciter according to an exemplary embodiment of the present invention;

[0025] Figure 11 1 is a schematic top view of a backlight module according to an exemplary embodiment of the present invention;

[0026] Figure 12 The present invention is shown along the exemplary embodiment Figure 11 Schematic diagram of the cross-sectional structure in the BB' direction;

[0027] Figure 13 is a schematic diagram of an exploded structure of a display device according to an exemplary embodiment of the present invention;

[0028] Figure 14 FIG1 is a schematic diagram of a three-dimensional structure of another display device according to an exemplary embodiment of the present invention;

[0029] Figure 15 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0030] Figure 16 is a schematic diagram of a three-dimensional structure of another display device according to an exemplary embodiment of the present invention;

[0031] Figure 17 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0032] Figure 18 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0033] Figure 19 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0034] Figure 20 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0035] Figure 21 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0036] Figure 22 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0037] Figure 23 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0038] Figure 24 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0039] Figure 25 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0040] Figure 26 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0041] Figure 27 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0042] Figure 28 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0043] Figure 29 The present invention is a method according to an exemplary embodiment of the present invention. Figure 27 Schematic diagram of the cross-sectional structure in the CC' direction;

[0044] Figure 30 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0045] Figure 31 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0046] Figure 32 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0047] Figure 33 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0048] Figure 34 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0049] Figure 35 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0050] Figure 36 is a schematic top view of another display device according to an exemplary embodiment of the present invention;

[0051] Figure 37 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0052] Figure 38 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0053] Figure 39 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0054] Figure 40 1 is a schematic diagram of a rear view structure of a display device according to an exemplary embodiment of the present invention;

[0055] Figure 41 1 is a schematic structural diagram of a phase plug according to an exemplary embodiment of the present invention;

[0056] Figure 42 is a schematic structural diagram of a driving circuit in a display device according to an exemplary embodiment of the present invention;

[0057] Figure 43 This is a schematic diagram of an application scenario of a display device according to an exemplary embodiment of the present invention;

[0058] Figure 44 Schematic diagram of a processing process of a frequency division delay algorithm according to an exemplary embodiment of the present invention;

[0059] Figure 45 is a schematic diagram of a three-dimensional structure of a base according to an exemplary embodiment of the present invention;

[0060] Figure 46is a perspective structural diagram of a display device according to an exemplary embodiment of the present invention;

[0061] Figure 47 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0062] Figure 48 is a schematic cross-sectional structural diagram of another display device according to an exemplary embodiment of the present invention;

[0063] Figure 49 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0064] Figure 50 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0065] Figure 51 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0066] Figure 52 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0067] Figure 53 is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention;

[0068] Figure 54 It is a front structural schematic diagram of another display device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0069] In order to make the purpose and implementation of the present invention clearer, the exemplary implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the exemplary embodiment of the present invention. Obviously, the described exemplary embodiment is only a part of the embodiment of the present invention, not all of the embodiments.

[0070] It should be noted that the brief descriptions of terms in the present invention are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of the present invention. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0071] In the present specification, claims, and drawings, the terms "first," "second," "third," and the like are used to distinguish similar or similar objects or entities and are not necessarily intended to define a particular order or precedence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable where appropriate.

[0072] The terms "comprise," "include," and "have," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0073] The display device provided in the embodiments of the present invention may have various implementation forms, for example, it may be a television, a smart TV, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 and Figure 2 This is a specific embodiment of the display device of the present invention.

[0074] Figure 1 FIG. 1 is a schematic diagram of an operation scenario between a display device and a control device according to an exemplary embodiment of the present invention. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control apparatus 100. The server 400 can provide the display device 200 with various contents and interactions.

[0075] Figure 2 FIG. 1 is a block diagram 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 converts operation instructions into instructions that the display device 200 can recognize and respond to, acting as an interaction medium between the user and the display device 200.

[0076] Figure 3 FIG. 1 is a block diagram showing a configuration 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 a tuner and demodulator 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. In some embodiments, after the display device is started, the interface of the pre-set video-on-demand program can be directly entered. The interface of the video-on-demand program can be as shown in FIG. Figure 4 As shown in , it at least includes a navigation bar 310 and a content display area located below the navigation bar 310.

[0077] Figure 5 FIG1 is a schematic diagram of a three-dimensional structure of a display device according to an exemplary embodiment of the present invention. Figure 6 The present invention is a method according to an exemplary embodiment of the present invention. Figure 5 Schematic diagram of the cross-sectional structure in the AA' direction. 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 sounding board 5 and a sounding exciter 6. The sounding board 5 is fixed to the surface of the backlight module 2 away from the liquid crystal display panel 1, and the vibration output terminal of the sounding exciter 6 is fixed to the surface of the sounding board 5 away from the backlight module 2. The sounding exciter 6 is used to excite the sounding board 5 to vibrate through the vibration output terminal to drive the backlight module 2 to vibrate.

[0078] In some embodiments, some embodiments of the present invention provide a screen self-sounding liquid crystal display device, which belongs to the field of multimedia technology combining display devices and electroacoustics. Figure 5 and Figure 6 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 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. The sealed air gap between the liquid crystal display panel 1 and the backlight module 2 and inside the liquid crystal display panel 1 is equivalent to a damping spring. The sound exciter 6 is used to excite the sound plate 5 to vibrate through the vibration output terminal to drive the backlight module 2 to vibrate, and then use the damping spring equivalent to the sealed air gap to transmit the vibration force of the back plate 30 in the backlight module 2 vibrated by the sound exciter 6 to the front panel of the liquid crystal display panel 1, so that the liquid crystal display panel 1 vibrates and makes sound. Moreover, since the sound exciter 6 is located on the surface of the sound 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 panel 30 and a light-emitting structure 18 on the back panel 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 panel 30, such as the top of the lamp bead. The air gap between the liquid crystal display panel 1 and the back panel 30 in the backlight module 2 can be the same height as the light-emitting structure 18 or slightly higher than the height of the light-emitting structure 18.

[0079] For example, the sounding plate 5 can be a honeycomb plate or a carbon fiber plate. When the screen size of the display device is 65 inches and an aluminum honeycomb is used as the sounding plate 5, the thickness of the sounding plate 5 can be, for example, 1 mm to 4 mm. The core material of the sounding plate 5 includes, but is not limited to, paper, aramid, metal, or other rigid foam materials, and the skin material of the sounding plate 5 includes, but is not limited to, glass fiber, carbon fiber, glass-carbon hybrid fiber, plastic, or lightweight aluminum. In addition, the sounding plate 5 can also serve as a heat conduction and heat dissipation plate for the back panel 30 in the backlight module 2.

[0080] Figure 7 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 8 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figures 5 to 8 The acoustic actuator 6 can be, for example, an electromagnetic vibration actuator, comprising coil tubes 805 and 806, magnetic field circuits 801, 802, and 804, a damper 807, and a cushion. The acoustic actuator 6 vibrates the sounding board 5 using an inertial drive mechanism. The inertial drive mechanism includes the acoustic actuator 6 and its own supporting and stabilizing structure. This inertial drive mechanism does not require additional support or fixation at the rear of the acoustic actuator 6; the entire acoustic actuator 6 vibrates along with the display device.

[0081] In some embodiments, the vibration output terminal 7 of the sound exciter 6 is directly connected to one side of the sound plate 5, the central axis of the sound exciter 6 is perpendicular to the plane of the sound plate 5, and the vibration output direction is along the central axis of the sound exciter 6 and perpendicular to the surface of the display device, that is, Figure 7 In the vertical direction. Under the influence of the magnetic field, the electromagnetic force causes the lighter coil tube to produce a higher-frequency resonance, which directly vibrates the sound board 5 and backlight module 2. The reaction force of the electromagnetic force causes the larger sound exciter 6 body to produce a lower-frequency resonance and vibrate the sound board 5 and backlight module 2 through the fulcrum cushion. The sound exciter 6 body has no fixed support, but vibrates with the vibration of the driven sound board 5 and backlight module 2. This is also the biggest difference between the OLED screen sound exciter 6 body fixed to the bracket excitation method.

[0082] like Figure 7 As shown, a fixing pin 63 is provided at the position of the middle frame structure 37, and the sound exciter 6 is connected to the fixing pin 63 through an I-shaped silicone isolation pad, so that the sound exciter 6 obtains a suspended support and fixation with a certain degree of freedom of movement forward and backward through the silicone isolation pad. Alternatively, it can also be as Figure 8 As shown, the sound exciter 6 is directly fixed to the sound plate 5 . Figure 9 This is a schematic diagram of a three-dimensional structure of a sound exciter according to an exemplary embodiment of the present invention, combined with Figure 8 and Figure 9 The sound exciter 6 has three or four sheet-like elastic legs 64 with a low elastic coefficient extending away from the center. The sheet-like elastic legs 64 extend in a spiral or radial direction away from the center. One end of the sheet-like elastic legs 64 away from the center is fixed to the sound plate 5 through a damping block 65. The damping block 65 can be, for example, EVA (ethylene-vinyl acetate copolymer) with double-sided tape on the surface. Figure 10 FIG. 1 is a schematic cross-sectional view of a sound 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 higher 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.

[0083] It should be noted that, in addition to the electromagnetic vibration exciter described in the above embodiment, the sound exciter 6 can also use a piezoelectric drive method to achieve excitation vibration. Some embodiments of the present invention do not limit the specific implementation type and specific structure of the sound exciter 6, and the specific working principle of the sound exciter 6 is well known to those skilled in the art and will not be repeated here. In addition, Figure 5 only illustrates the distribution position of the sound exciter 6 in the display device. Some embodiments of the present invention do not specifically limit the distribution position of the sound exciter 6 in the display device, and the specific setting of the distribution position of the sound exciter 6 can be performed according to the sound requirements of the display device.

[0084] Therefore, some embodiments of the present invention utilize a sounding plate 5 and a sealed air cavity with viscous air inside, so that the sound exciter 6 can transmit the vibration to the front panel of the liquid crystal display panel 1 through the sounding plate 5, the backlight module 2, and the sealed air cavity 4 in sequence, so that the liquid crystal display panel 1 vibrates and makes sound. Moreover, since the vibration output terminal 7 of the sounding exciter 6 is fixed to the surface of the sounding plate 5 away from the backlight module 2, the setting of the sounding exciter 6 does not affect the display of the display device, making it possible for traditional LCD screens to make sounds, bringing users an integrated audio-visual experience of sound and picture in which the sound comes from the image, overcoming the industry bottleneck problem of the difficulty of making sounds on LCD screens.

[0085] In some embodiments, Figure 11 FIG1 is a schematic top view of a backlight module according to an exemplary embodiment of the present invention. Figure 12 The present invention is shown along the exemplary embodiment Figure 11 Schematic diagram of the cross-sectional structure in the BB' direction. Figures 6 to 8 as well as Figures 11 to 12 , the sounding plate 5 is provided with a first viscous buffer structure ( Figure 12 (not shown) is fixed to the backlight module 2.

[0086] In some embodiments, to meet display device processing yield and cost requirements, the backlight module 2 in the display device may include multiple back panels 30, which are evenly arranged and spliced ​​together to form the backlight module 2. Both the sounding board 5 and the back panel 30 may be rectangular flat panels. The first adhesive buffer structure may be double-sided tape. The back panels 30 are evenly arranged and attached to the sounding board 5 via the first adhesive buffer structure. The sounding board 5 interconnects adjacent back panels 30, forming a single, integrated panel with tight seams between the back panels 30. Furthermore, the first adhesive buffer structure also acts as a buffer between the sounding board 5 and the backlight module 2, preventing the two from colliding during vibration and generating noise that could affect the display quality of the display device.

[0087] In some embodiments, combined Figure 7 and Figure 8, the vibration output terminal 7 is connected to the second viscous buffer structure ( Figure 7 and Figure 8 (not shown) is fixed to the sound plate 5. In some embodiments, the vibration output terminal 7 can also be in direct contact with the sound plate 5, and can also drive the sound plate 5 to vibrate, but this will cause the vibration output terminal 7 to separate from the sound plate 5 when the sound exciter 6 vibrates downward, and cannot excite the liquid crystal display panel 1 to make a sound. When the sound exciter 6 vibrates upward, it will produce a hard collision with the sound plate 5 to produce noise. In some embodiments of the present invention, the vibration output terminal 7 is fixed to the sound plate 5 by a second viscous buffer structure. The second viscous buffer structure can be, for example, double-sided tape, which solves the problem that when the sound exciter 6 vibrates downward, the vibration output terminal 7 is separated from the sound plate 5, and cannot excite the liquid crystal display panel 1 to make a sound, and when the sound exciter 6 vibrates upward, it will produce a hard collision with the sound plate 5 to produce noise.

[0088] In some embodiments, Figure 13 FIG1 is a schematic diagram of an exploded structure of a display device according to an exemplary embodiment of the present invention. Figures 6 to 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 a position corresponding to the frame 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.

[0089] In some embodiments, the first annular sealing structure 12 may be, for example, optical glue. The first annular sealing structure 12 makes the air in the air gap of the air cavity 3 have viscosity. The sound exciter 6 is used to excite the sound plate 5 to vibrate through the vibration output terminal 7 to drive the backlight module 2 to vibrate. Therefore, some embodiments of the present invention use optical glue to achieve a fully bonded 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 repeated here. Optical glue is used to bond the liquid crystal film layer 10, the optical film and the diffusion plate so that the multi-layer film structure becomes a component, which is 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 bonded structure of the liquid crystal display panel 1. For example, the material constituting the diffusion plate includes but is not limited to glass, acrylic or polycarbonate and other lightweight transparent organic plates.

[0090] It should be noted that the optical diffusion film layer 11 may include an optical film and a diffusion plate. The optical film is located on the side of the diffusion plate adjacent to the liquid crystal film layer 10. Figure 6An air cavity is formed between the optical film and the liquid crystal film layer 10, or between the optical film and the diffuser plate, or between the optical film and the liquid crystal film layer 10, and between the optical film and the diffuser plate. In addition, the optical film and the diffuser plate can be arranged in contact with the middle frame structure 37 at a portion of the frame corresponding to the display device, for example Figure 6 At the middle right side frame position, the optical film and the diffuser plate are both in contact with the middle frame structure 37. At the other frame positions, the optical film and the diffuser plate are suspended relative to the middle frame structure 37, for example Figure 6 The optical film and the diffuser plate at the middle left side frame are suspended relative to the middle frame structure 37 .

[0091] Thus, the aforementioned air cavity passes through the suspended position, e.g. Figure 6 The left side of the center frame connects to the air cavity between the back plate 30 and the diffuser plate to form a sealed air cavity 4 between the backlight module 2 and the liquid crystal display panel 1. This allows the sound from the sound-generating panel to be transmitted to the front of the display panel, thereby achieving screen sound. In this case, the sealed air cavity 4 includes the air cavity between the back plate 30 and the diffuser plate, 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.

[0092] Alternatively, it is also possible to configure that no air cavity is formed between the optical film and the liquid crystal film layer 10, or between the optical film and the diffuser plate, that is, the optical film is in direct contact with the liquid crystal film layer 10, and the optical film is in direct contact with the diffuser plate. 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 There is an air gap at the middle left frame position, and the two are connected to form a sealed air cavity.

[0093] In some embodiments, Figure 14 FIG1 is a schematic diagram of a three-dimensional structure of another display device according to an exemplary embodiment of the present invention. Figures 6 to 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 a position corresponding to the frame of the liquid crystal display panel 1 , and the backlight module 2 and the liquid crystal display panel 1 form a sealed air cavity 4 through the second annular sealing structure 13 .

[0094] In some embodiments, the second annular sealing structure 13 can be, for example, optical glue. The second annular sealing structure 13 is arranged around the frame position of the liquid crystal display panel 1, so that the air in the air gap of the sealed air cavity 4 has viscosity. The sound exciter 6 is used to excite the sound plate 5 to vibrate through the vibration output terminal 7 to drive 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, for example, it can also be 1 mm. In addition, the first annular sealing structure 12 can also be arranged around the frame position of the liquid crystal display panel 1 similarly to the second annular sealing structure 13.

[0095] Therefore, circumventing the stacked structure of the display device that produces sound as described in some embodiments of the present invention, especially circumventing the airtight layer between the liquid crystal display panel 1 and the backlight module 2, will not achieve or severely reduce the effect of coupling vibration to the liquid crystal display panel 1 to achieve sound. Similarly, circumventing the full-fit structure inside the liquid crystal display panel 1 will severely reduce the vibration transmission effect, affecting the full-band response of the display device in the low, medium and high frequency ranges.

[0096] In some embodiments, the backlight module 2 includes a MiniLED light-emitting structure. In some embodiments, the MiniLED light-emitting structure is relatively small. Including the MiniLED light-emitting structure in the backlight module 2 effectively reduces the air gap between the LCD panel 1 and the backlight module 2. Furthermore, by sealing the LCD panel 1 and the backlight module 2 on all sides, the air in the air gap becomes viscous. This sealed air gap acts as a damping spring between the LCD panel 1 and the backlight module 2, transmitting the vibration force from the acoustic actuator 6 that vibrates the backlight module 2 to the LCD panel 1 to produce sound.

[0097] It should be noted that the backlight module 2 may include multiple back panels 30, i.e., light panels, or multiple light strips, which is not specifically limited in some embodiments of the present invention. The backlight module 2 is not limited to including a MiniLED light-emitting structure, and other self-luminous structures may also be used as the backlight module 2.

[0098] Figure 15 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 16 FIG. 1 is a schematic diagram of a three-dimensional structure of another display device according to an exemplary embodiment of the present invention. Figure 15 and Figure 16 The display device further includes a plurality of elastic support members 17, the elastic support members 17 are interference-enclosed between the first structure and the liquid crystal display panel 1, the first structure is the backlight module 2 or the sound board 5, and the first structure is for example Figure 15 and Figure 16The backlight module 2 comprises a plurality of light emitting structures 18 on a side of the backlight module 2 adjacent to the liquid crystal display panel 1 . The elastic support member 17 may be located between the light emitting structures 18 .

[0099] In some embodiments, problems arise during the vibration transmission process of the acoustic actuator 6. The thickness of the air gap between the LCD panel 1 and the backlight module 2 varies significantly due to material tolerances, assembly process tolerances, and gravity. This results in inconsistent vibration transmission efficiency, and the LCD panel 1 and backlight module 2 can cause vibration noise and wear when they are attached to each other. To avoid these risks, some embodiments of the present invention include an elastic support member 17 between the LCD panel 1 and the backlight module 2. The elastic support member 17 has the following characteristics: one side contacts the LCD panel 1 and the other side contacts the backlight module 2. One or both sides are connected to the contact points through a mechanical structure or adhesive fixation. The elastic support member 17 can be made of a high-rebound material or a combination of materials with rebound properties, such as silicone. The elastic support member 17 ensures the stability of the air gap size between the LCD panel 1 and the backlight module 2, preventing abnormal collision noise between the LCD panel 1 and the backlight module 2. The solid elastic support member 17 also improves the transmission efficiency of vibration from the backlight module 2 to the LCD panel 1. In addition, position a in FIG16 can be a tape.

[0100] In some embodiments, the elastic support member 17 is interference-fitted between the backlight module 2 and the liquid crystal display panel 1, that is, the combination of the two sides of the elastic support member 17 with the liquid crystal display panel 1 and the backlight module 2 can adopt a dimensional interference fit design, that is, the size of the elastic support member 17 is larger than the height design size between the liquid crystal display panel 1 and the backlight module 2. Figure 17 1 is a schematic 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 vibrates backward, the elastic support member 17 is in a free contact state. Figure 18 This is a schematic diagram of the cross-sectional structure of another display device according to an exemplary embodiment of the present invention. When the corresponding sound exciter 6 is not vibrating and the elastic support member 17 is in a static position, the elastic support member 17 is in an interference compression state due to the extrusion between the liquid crystal display panel 1 and the backlight module 2. Figure 19 This is a schematic diagram of the cross-sectional structure 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 member 17 is in a further overpressure state. The size of the elastic support member 17 can be, for example, the sum of the distance between the liquid crystal display panel 1 and the backlight module 2 and half the vibration amplitude of the vibrator, ensuring Figure 17 In the state shown, the elastic support member 17 is in contact with both the liquid crystal display panel 1 and the backlight module 2 , thereby improving the transmission efficiency of vibration from the backlight module 2 to the liquid crystal display panel 1 .

[0101] In some embodiments, combined Figures 17 to 19 , the elastic support member 17 can be fixed to the first structure, such as the backlight module 2, through a first adhesive structure 19, and the first adhesive structure 19 is, for example, a double-sided adhesive tape. Or, Figure 20 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 20 As shown, the elastic support member 17 can also be disposed adjacent to the first structure. For example, a welding structure 20 is disposed on one side of the backlight module 2, and the elastic support member 17 is welded and fixed to the first structure, such as position 67 of the backlight module 2, via the welding structure 20. In some embodiments, a metal structure of a readily weldable material can be injection molded, mechanically fitted, or bonded within the elastic support member 17. This welding structure 20 is then fixedly connected to the back plate 30 of the backlight module 2 by welding, thereby securing the elastic support member 17. This method allows for secure installation of the elastic support member 17 and facilitates automated mass assembly.

[0102] In addition, the material of the elastic support member 17 can be an elastic material such as silicone rubber, but the elastic material has the problem of changing its hardness due to the influence of temperature. When the internal temperature of the display device is working, the hardness of the elastic support member 17 will change, thereby affecting the support and vibration transmission optimization function of the elastic support member 17. Figure 20 As shown, it can be optimized by dual-material composite, where the elastic material part ensures the vibration buffering effect, and the non-elastic material part, ie the welded structure 20, ensures that the vibration transmission effect does not change with temperature.

[0103] In some embodiments, Figure 21 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 21 As shown, suction cup structures may also be provided at both ends of the elastic support member 17 , and the elastic support member 17 is 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 FIG. 1 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 member 17 can also be fixed to the first structure, such as the backlight module 2, via a first adhesive structure 19, such as double-sided tape, and the other end of the elastic support member 17 is provided with a suction cup structure, and the elastic support member 17 is fixed to the liquid crystal display panel 1 via the suction cup structure. In this way, the elastic support member 17 can be fixed by double-sided bonding or by a mechanical structure, thereby achieving vibration linkage between the backlight module 2 and the liquid crystal display panel 1 and improving the vibration transmission efficiency. However, double-sided bonding or mechanical structure fixing have the disadvantage of complex process implementation. The solution of suction cup adsorption can improve the feasibility of the solution.

[0104] In some embodiments, Figure 23 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 24 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 23 and Figure 24 The first structure can also be a sounding board 5, and the elastic support member 17 is interference-enclosed between the sounding board 5 and the liquid crystal display panel 1. The side of the backlight module 2 adjacent to the liquid crystal display panel 1 includes multiple light-emitting structures 18, and the elastic support member 17 is located between the light-emitting structures 18.

[0105] In some embodiments, 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, and a plurality of positioning holes 23 are provided on the fixing plate 22. A plurality of through-mounting holes 24 are provided on the backlight module 2. The positioning holes 23 are used to fix the elastic support member 17 in the through-mounting holes 24 and on the sound plate 5; or Figure 24 As shown, the backlight module 2 includes a plurality of countersunk holes 25 , which are used to fix the elastic support member 17 on the sound plate 5 .

[0106] In some embodiments, the adhesive layer between the elastic support member 17 and the backlight module 2 is prone to fall off after long-term vibration, and the assembly process is cumbersome. Figure 23 As shown, the backlight module 2 is provided with a mounting hole 24 at the mounting position of the elastic support member 17, and a glue layer is provided on the bottom of the backlight module 2 and the surface of the sound plate 5, wherein the bottom surface of the elastic support member 17 is bonded to the glue layer, and a fixing plate 22 is added to the surface of the backlight module 2. The fixing plate 22 has a hole and makes the top end of the elastic support member 17 protrude. The bottom cross-sectional area of ​​the elastic support member 17 is larger than the top cross-sectional area, and the corresponding hole size of the fixing plate 22 is smaller than the bottom surface area of ​​the elastic support member 17. Thus, the elastic support member 17 is fixed to the position of the backlight module 2 through this structure to prevent the elastic support member 17 from falling off. Alternatively, as Figure 24 As shown, the backlight module 2 adds a countersunk hole 25 at the installation position of the elastic support member 17, so as to more easily fix the elastic support member 17. Figure 23 and Figure 24 The concept of fixing the elastic support member 17 of the structure shown adopts a similar structure for fixing the elastic support member 17, and some embodiments of the present invention do not specifically limit this. It should be noted that when the first structure is the sound plate 5, the fixing method of the elastic support member 17 and the sound plate 5 and the liquid crystal display panel 1 on both sides thereof can also refer to Figures 17 to 22 The fixing method is not described here.

[0107] For example, in combination Figures 15 to 24The elastic support member 17 can be, for example, conical or cylindrical, or can be configured similarly to Figure 16 In the shape shown, for example, the cross-sectional area of ​​the portion of the elastic support member 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 member 17 adjacent to the backlight module 2 .

[0108] In addition, the elastic support member 17 is disposed within the illumination range of the light-emitting structure 18 on the backlight module 2. The shape design of the elastic support member 17 needs to take into account 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 member 17 can, for example, be placed at an equal distance from the four surrounding light-emitting structures 18 and adopt a conical or tapered tetrahedron design. When the elastic support member 17 is designed as a tapered tetrahedron, the off-axis angle between each face of the elastic support member 17 and the corresponding light-emitting structure 18 can be the same.

[0109] In some embodiments, Figure 25 FIG. 1 is a schematic diagram of a top view of 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 circular rings with the sound exciter 6 as the center. The distribution density of the elastic support members 17 decreases in the direction away from the sound exciter 6, thereby ensuring that the vibration buffering and vibration transmission effects in the area where the entire display device is located are relatively uniform, and optimizing the number of elastic support members 17, which is conducive to reducing the implementation cost of the display device and the difficulty of process assembly.

[0110] In some embodiments, Figure 26 FIG. 1 is a schematic diagram of a top view of another display device according to an exemplary embodiment of the present invention. Figure 26 As shown, the supporting strength of the elastic support member 17 decreases in the direction away from the sound driver 6; and / or the height of the elastic support member 17 decreases in the direction away from the sound driver 6. Figure 26Different degrees of grayscale are used to represent differences in the support strength or height of the elastic support members 17. A higher grayscale, corresponding to a darker fill color, indicates a higher support strength or height of the elastic support members 17. A lower grayscale, corresponding to a lighter fill color, indicates a lower support strength or height of the elastic support members 17. For example, the above settings can be applied only to the support strength of the elastic support members 17, only to their height, or both. This allows for the corresponding arrangement of the elastic support members 17 according to the vibration amplitude, further optimizing the uniformity of vibration buffering and vibration transmission across the entire display device area. On the other hand, the degree of interference fit of the elastic support member 17 can also be adjusted according to the position of the sound exciter 6, that is, the height of the elastic support member 17 close to the sound exciter 6 is set to be greater than the height of the elastic support member 17 away from the sound exciter 6, so that the vibration transmission efficiency at the position close to the sound exciter 6 is the highest, and the assembly tolerance of the elastic support member 17 away from the sound exciter 6 is avoided, resulting in a non-interference fit of the elastic support member 17 near the sound exciter 6, that is, ensuring that the elastic support members 17 arranged at various positions in the area where the corresponding display device is located do not separate from the liquid crystal display panel 1 and the backlight module 2 when vibrating, thereby optimizing the vibration transmission efficiency of the elastic support members 17 at various positions.

[0111] In some embodiments, Figure 27 FIG2 is a schematic top view of another display device according to an exemplary embodiment of the present invention. Figure 28 FIG2 is a schematic top view of another display device according to an exemplary embodiment of the present invention. Figure 29 The present invention is a method according to an exemplary embodiment of the present invention. Figure 27 Schematic diagram of the cross-sectional structure in the CC' direction. Figures 27 to 29 The backlight module 2 includes a plurality of back panels 30, and a first buffer structure 31 is provided between adjacent back panels 30. The first buffer structure 31 is located on the sound plate 5 and is used to separate adjacent back panels 30 to increase the vibration buffering between the edges of the back panels 30 and avoid abnormal vibration. In addition, Figure 28 As shown, the intersection between the four adjacent back plates 30 is also prone to vibration noise due to the overlap of the back plate 30 area. The first buffer structure 31 can be set at the intersection between the four adjacent back plates 30 to increase the vibration buffering of the intersection of the back plates 30 and avoid abnormal vibration.

[0112] In some embodiments, combined Figure 27 and Figure 29, the first buffer structure 31 can be arranged in a strip shape, and the first buffer structure 31 is used to connect multiple elastic support members 17 into one body, that is, the first buffer structure 31 and multiple elastic support members 17 are formed into one body, which effectively reduces the difficulty of installing the elastic support members 17. In some embodiments, when the first structure is the backlight module 2, the arrangement relationship between the first buffer structure 31 and the elastic support member 17 is as follows: Figure 29 As shown, when the first structure is the sounding plate 5 , the first buffer structure 31 and the elastic support member 17 are simultaneously provided on the sounding plate 5 and the first buffer structure 31 and the elastic support member 17 are integrally formed.

[0113] Figure 30 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 30 As shown, the side of the backlight module 2 adjacent to the liquid crystal display panel 1 includes a plurality of light-emitting structures 18, and an elastic support member 17 is provided on the light-emitting structure 18 to cover it. The elastic support member 17 is a light-guiding elastic support member, and the first structure is the backlight module 2. In some embodiments, the light-emitting structure 18 is, for example, a MiniLED, and the elastic support member 17 can be realized by providing a light-guiding member or a light-guiding glue point at the position of the light-emitting structure 18. Thus, the elastic support member 17 can be installed on the backlight module 2 by welding the light-emitting structure 18 to the back plate 30 in the backlight module 2, which is conducive to improving assembly efficiency. With reference to the above embodiments, some embodiments of the present invention utilize an elastic support member 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 of the area between the sound plate 5 and the liquid crystal display panel 1.

[0114] In some embodiments, Figure 31 FIG. 1 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 member 17 can be set as a multifunctional elastic diffusion plate bracket, that is, the elastic support member 17 can replace the lens and diffusion plate bracket in the backlight, and the elastic support member 17 can effectively support the liquid crystal display panel 1 by contacting the diffusion plate in the optical diffusion film layer 11, and the area of ​​the cross section of the elastic support member 17 parallel to the liquid crystal display panel 1 increases in the direction away from the back panel 30, so that the elastic support member 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 evenly distributed.

[0115] In some embodiments, as Figure 31As shown, a plurality of bubble structures may be formed inside the elastic support member 17, and the distribution density of the bubble structures decreases in the direction away from the first center axis YY'; and / or a plurality of light-guiding particles are filled inside the elastic support member 17, and the distribution density of the light-guiding particles decreases in the direction away from the first center axis YY'; wherein the first center axis YY' is the longitudinal center axis of the elastic support member 17 perpendicular to the liquid crystal display panel 1, that is, a plurality of bubble structures may be formed inside the elastic support member 17, and the distribution density of the bubble structures decreases in the direction away from the first center axis YY', or a plurality of light-guiding particles may be filled inside the elastic support member 17, and the distribution density of the light-guiding particles decreases in the direction away from the first center axis YY', or a plurality of bubble structures and a plurality of light-guiding particles may be formed inside the elastic support member 17, and the distribution density of the bubble structures and the light-guiding particles decreases in the direction away from the first center axis YY'.

[0116] In some embodiments, the elastic support member 17 may be made of a silicone material with a set transparency. A plurality of bubble structures may be provided in the elastic support member 17 or light-guiding particles such as silica particles may be filled therein. Along the direction parallel to the plane where the liquid crystal display panel 1 is located, the distribution density of the bubble structure or light-guiding particles such as silica particles gradually decreases along the direction away from the longitudinal center axis of the elastic support member 17. The bubble structure or light-guiding particles with the above-mentioned distribution pattern are combined with the shape of the elastic support member 17, so that the elastic support member 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 evenly distributed, which is beneficial to optimizing the display effect of the display device.

[0117] In some embodiments, the surface of the elastic support member 17 is coated with a reflective film layer or coated with a reflective material. In some embodiments, the elastic support member 17 also has a light control effect. In the local dimming display mode, the surface of the elastic support member 17 is coated with a reflective film layer or coated with a reflective material, so that the light emitted from different light control areas is reflected by the surface of the elastic support member 17 in other control areas, reducing the mutual influence of light between different light control areas, thereby avoiding light interference between different local dimming display areas. For example, Figure 31 The backlight module 30 in the structure shown can be a light panel or a light bar, which is not limited in some embodiments of the present invention.

[0118] In some embodiments, Figure 32 FIG2 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 6 and Figure 32The 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 provided 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 further affecting the display effect of the display device. The present invention can effectively prevent the abrasion problem of the optical film 27 and the diffuser plate 28 by providing a multifunctional optical adhesive structure 29 between the optical film 27 and the diffuser plate 28, for example, by evenly providing multiple multifunctional optical adhesive structures 29 in multiple local areas between the optical film 27 and the diffuser plate 28.

[0119] In some embodiments, as Figure 32 As shown, the multifunctional optical adhesive structure 29 includes a raised lens structure 291 that protrudes away from the diffuser plate 28. In some embodiments, after the optical film 27 and diffuser plate 28 are bonded together, the light emitted from the liquid crystal display panel 1 is relatively dispersed, resulting in a wider viewing angle of the display device. This in turn reduces the brightness of the light-emitting structure 18, affecting the display quality. In the present invention, the raised lens structure 291 is used to converge the light emitted by the light-emitting structure 18. This has the effect of narrowing the viewing angle, effectively resolving the problem of reduced brightness of the light-emitting structure 18 caused by the widened viewing angle after the optical film 27 and diffuser plate 28 are bonded together, thereby optimizing the display quality of the display device.

[0120] In some embodiments, as Figure 32As shown, the multifunctional optical adhesive structure 29 includes a large-angle filter film layer 292, which is located on the side of the convex lens structure 291 adjacent to the diffuser plate 28. The large-angle filter film layer 292 is used to filter out the first light irradiated by the light-emitting structure 18 onto the large-angle filter film layer 292; wherein the incident angle of the first light relative to the large-angle filter film layer 292 is greater than a preset angle. In some embodiments, when light with an incident angle greater than a preset angle relative to the large-angle filter film layer 292 irradiates the large-angle filter film layer 292, this part of the light will be reflected at the large-angle filter film layer 292 back to the side where the light-emitting structure 18 is located, that is, this part of the light 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 impact between the local dimming dynamic areas. Exemplarily, the large-angle filter film layer 292 can be attached to the diffuser plate 28 via an adhesive layer 293. For example, a local dimming dynamic area can be configured to correspond to a multifunctional optical adhesive structure 29, and a multifunctional optical adhesive structure 29 can correspond to a light-emitting structure 18 or multiple 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 be set according to the specific distribution of the local dimming dynamic area.

[0121] In some embodiments, Figure 33 FIG2 is a schematic top view of another display device according to an exemplary embodiment of the present invention. Figure 34 FIG1 is a schematic diagram of a top view of another display device according to an exemplary embodiment of the present invention. Figure 33 and Figure 34 , referring to the above embodiment, in Figures 15 to 24 On the basis of the above, the display device further includes a channel isolation structure 32, which is provided on the backlight module 2 and is used to separate adjacent sound exciters 6. In some embodiments, the channel isolation structure 32 is, for example, an elastic colloid structure, which improves the voice isolation between the channels, reduces the vibration effect between the vibration areas of the channels, and optimizes the sound effect of the display device. Figure 33 The middle channel isolation structure 32 is used to separate the left and right sound exciters 6. Figure 34 Three channel isolation structures 32 are provided to separate the areas where the three sound exciters 6 are located. Some embodiments of the present invention can be extended to improve the isolation of more channel vibration areas. For example, the channel isolation structure 32 can also be implemented using the first buffer structure 31 described in the above embodiment.

[0122] In some embodiments, as Figure 33As shown, a plurality of sound channel isolation structures 32 are provided between adjacent sound exciters 6. The sound channel isolation structures 32 are used to connect a plurality of elastic support members 17 into one body, that is, the sound channel isolation structures 32 are integrally formed with a plurality of elastic support members 17. The elastic support members 17 on different sound channel isolation structures 32 are arranged in an alternating manner, which effectively reduces the difficulty of installing the elastic support members 17, so that the vibration is effectively attenuated in the sound channel isolation structure 32, so as to further optimize the voice isolation between each sound channel, reduce the vibration influence between the vibration areas of each sound channel, and optimize the sound effect of the display device. In some embodiments, when the first structure is the backlight module 2, the sound channel isolation structure 32 and the elastic support member 17 are simultaneously provided on the backlight module 2 and the sound channel isolation structure 32 and the elastic support member 17 are integrally formed. When the first structure is the sound plate 5, the first buffer structure 31 located on the backlight module 2 is integrally formed with the elastic support member 17 by connecting the tip top of the elastic support member 17.

[0123] In some embodiments, Figure 35 FIG2 is a schematic top view of another display device according to an exemplary embodiment of the present invention. Figure 36 FIG1 is a schematic diagram of a top view of another display device according to an exemplary embodiment of the present invention. Figure 35 and Figure 36 , referring to the above embodiment, in Figures 30 to 32 On the basis of the display device, the display device further includes a sound channel isolation structure 32, which is arranged on the backlight module 2 and is used to separate adjacent sound exciters 6. The specific working principle of the sound channel isolation structure 32 can be referred to the above embodiment. Figure 33 and Figure 34 The description is not repeated here.

[0124] In some embodiments, Figure 37 FIG1 is a front view structural diagram of another display device according to an exemplary embodiment of the present invention. Figure 6 、 Figure 16 as well as Figure 37 The display device further includes a middle frame structure 37 , which is located on a side of the sound plate 5 away from the backlight module 2 , and a second buffer structure 38 is provided between the middle frame structure 37 and the sound plate 5 .

[0125] In some embodiments, a second buffer structure 382, ​​such as double-sided tape, is attached between the middle frame structure 37 and the sound plate 5 at the perimeter of the liquid crystal display panel 1. A second buffer structure 381, such as double-sided tape, is provided near the sound exciter 6. The second buffer structure 381 can be softer than the second buffer structure 382 to accommodate the larger amplitude in the area where the sound exciter 6 is located. Related circuit boards, brackets, and housings are all mounted on the middle frame structure 37. The second buffer structure 38 provides a buffer between the sound plate 5 and the middle frame structure 37, preventing vibration from being transmitted through the sound plate 5 to the middle frame structure 37 and affecting the structures on the middle frame structure 37.

[0126] Figure 38 FIG. 1 is a schematic cross-sectional view of another display device according to an exemplary embodiment of the present invention. Figure 38 As shown, based on the above embodiment, the display device further includes a rear housing 39. The display device includes a middle frame structure 37 located on a side of the sound plate 5 away from the backlight module 2. The rear housing 39 is located on a side of the middle frame structure 37 and the sound exciter 6 away from the sound plate 5. In some embodiments, the rear housing 39 is the outer shell of the display device, which can be, for example, but not limited to, a television.

[0127] In some embodiments, Figure 39 FIG2 is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention. Figure 40 FIG1 is a schematic diagram of the back structure of another display device according to an exemplary embodiment of the present invention. Figure 39 and Figure 40 , a plurality of high-frequency speakers 56 are arranged on the frame of the display device.

[0128] In some embodiments, due to the different spaces between the backlight module and the screen caused by the different light mixing distances of different models, the sound effects of the screen will also vary. The larger the space, the worse the high-frequency effect. For example, for a model with a light mixing distance of 6mm, the upper limit of the vibration frequency of the screen is 1.5kHz. In order to achieve the full-band sound effect of the display device, other technical solutions or sound-generating devices need to be used to make up for the lack of high-frequency sound effects of the display device. In some embodiments of the present invention, a plurality of high-frequency speakers 56 are set on the frame of the display device. The frequency of the sound emitted by the high-frequency speakers 56 is greater than or equal to a preset frequency. The preset frequency is, for example, but not limited to, 3MHz. This makes up for the lack of high-frequency sound effects of the display device, effectively improves the sound effects of the high-frequency band of the display device, and is conducive to achieving the full-band sound effects of the display device. For example, a high-frequency speaker 56 that emits sound upwards can be added to the top frame of the display device, or a high-frequency speaker 56 that emits sound downwards can be added to the bottom frame of the display device, or a plurality of high-frequency speakers 56 that emit sound left or right can be set on the left and right frames of the display device respectively. In some embodiments of the present invention, the specific position of the high-frequency speaker 56 on the frame of the display device is not limited.

[0129] In some embodiments, combined Figure 39 and Figure 40 , the high frequency speakers 56 may be arranged to be symmetrically distributed about the central axis of the display device, for example Figure 39 and Figure 40 The tweeters 56 on the left and right middle frames are symmetrically distributed about the longitudinal center axis of the display device. The two tweeters 56 on the bottom frame are also symmetrically distributed about the longitudinal center axis of the display device. Alternatively, the tweeters 56 can also be symmetrically distributed about the transverse center axis of the display device, though this is not a limitation in some embodiments of the present invention. Thus, by arranging the tweeters 56 symmetrically about the center axis of the display device, the sound output from the tweeters 56 on the display device is more uniform, further optimizing the sound quality of the display device.

[0130] In some embodiments, the sound outlet surface of the tweeter 56 is provided with a phase plug. Figure 41 FIG. 1 is a structural diagram of a phase plug according to an exemplary embodiment of the present invention. Figure 41 As shown, the phase plug 57 is used to make the high-frequency speaker 56 sound in the direction of the display panel away from the rear housing 39, even if the high-frequency speaker 56 sounds toward the display side of the display device, even if the high-frequency speaker 56 sounds toward the display side of the display device. Figure 41 The sound is emitted in the middle left direction.

[0131] Figure 42 FIG. 1 is a schematic diagram showing the structure of a driving circuit in a display device according to an exemplary embodiment of the present invention. Figure 42As shown, the full-frequency signal is used to drive the sound exciter 6 for screen sound, and the signal after the high-pass filter is sent to the high-frequency speaker 56. Although this can complement the high-frequency sound effect of the display device, there is still a problem. Since the screen sound frequency is below 2kHz, the sound signal below 5kHz will have a significant impact on the sound positioning sense of the display device. Figure 39 and Figure 40 The directivity axis of the center-upper speaker is in the vertical direction, which will cause the high-frequency speakers 56 in different positions to be unable to concentrate relative to the sound direction of the display device. The high-frequency speakers 56 will have similar problems as mentioned above when emitting sound downward, left, or right, causing the sound of the display device to be dispersed and the sound effect to be poor, affecting the user experience.

[0132] To address this issue, some embodiments of the present invention provide a phase plug 57 on the sound outlet surface of the tweeter 56. The phase plug 57 is used to make the tweeter 56 emit sound in the direction away from the rear housing 39 of the display panel, that is, to emit sound in front of the display device. In some embodiments, the phase plug 57 is a tweeter unit with extended directivity. Figure 41 As shown, when the sound waves emitted by the high-frequency speaker 56 hit the phase plug 57, the design of the arc surface structure of the phase plug 57 can make the sound waves emitted by the high-frequency speaker 56 reflected from another direction, for example Figure 41 The dotted line b in the figure represents the direction of the sound waves. By reasonably designing the angle, shape and curvature relationship of the phase plug 57 with the diaphragm, the sound waves originally emitted by the high-frequency speaker 56 that emits sound upward can be turned to emit sound forward. Similarly, the sound waves originally emitted by the high-frequency speaker 56 that emits sound downward, left or right can be turned to emit sound forward, that is, toward the display side of the display device. This improves the problem of the display device's dispersed sound and poor sound effect, which affects the user experience as described in the aforementioned embodiment, and enables the high-frequency speakers 56 at different positions on the display device frame to emit sound in advance and in a concentrated manner. While improving the high-frequency band sound effect of the display device, the sound concentration effect of the high-frequency speaker 56 is further optimized.

[0133] It should be noted that in order for the display device to use the phase plug 57 to change the sound direction of the high-frequency speaker 56, that is, the phase plug can radiate sound forward, it is necessary to protrude the phase plug 57 from the display device. Figure 41 FIG. 5 exemplarily shows that the phase plug 57 is arranged to protrude from the top of the display device. Figure 42 In the figure, 80 is a high-pass filter and 81 is an amplifier.

[0134] Figure 43 FIG. 1 is a schematic diagram of an application scenario of a display device according to an exemplary embodiment of the present invention. Figure 43As shown, taking the high-frequency speaker 56 that sounds upward as an example, the directionality of sounds of different frequencies varies to a certain extent. Assuming that the position point of the screen sound is P1, and the high-frequency speaker 56 is responsible for sounds above 2kHz, assuming that the directionality of the sound of 4kHz is as follows Figure 43 As shown by the dashed line, the emission point on the wall is P2, with the 6kHz directivity being sharper. The emission point on wall 82 is P3. The sound, which should have been emitted from a single tweeter 56, has different distances to the human ear from each location—namely, the sound source points P1, P2, and P3—because it originates from the front of the screen and the side of the high-pitched sound, and because there are multiple sound reflection zones at different frequencies and locations. P1 is a direct sound source, meaning it travels directly from the screen surface to the human ear. The distance for the 4kHz sound source is from the top tweeter 56 to P2 and then to the human ear, while the distance for the 6kHz sound source is from the tweeter 56 to P3 and then to the human ear. Different frequencies experience different delays, resulting in the sound image being perceived at point P3 for high-frequency sounds, at point P2 for mid-frequency sounds, and at point P1 for low-frequency sounds. However, when a composite signal of high, medium and low frequencies is emitted, there are multiple sound sources, which results in the sound not being emitted from the screen, which is quite different from the sound produced by OLED, laser TVs, etc.

[0135] Some embodiments of the present invention propose a new algorithm. Figure 44 FIG. 1 is a schematic diagram showing a processing process of a frequency division delay algorithm according to an exemplary embodiment of the present invention. Figure 44 As shown, the entire audio frequency band is divided into N segments, each with a different delay. This allows the time it takes for the sound of each frequency band to reach the human ear to be adjusted. A certain point on the screen, such as the quarter point of the horizontal center line, can be set as a virtual sound image point. Using this point as a starting point, the paths taken by sounds of different frequencies to reach the human ear are calculated, followed by the delays for each frequency band. This allows the sound heard by the human ear to appear as if it were emanating from this virtual sound image point, allowing for up-and-down pronunciation, left-and-right pronunciation, and other forms of sound. f0 corresponds to the low-frequency band, corresponding to the frequency band of screen sound, and f1, f2, ..., fn are high-frequency bands. The sum of these corresponds to the operating frequency band of the tweeter. Taking the farthest point P1 as the benchmark, test the sound delay of the corresponding frequency bands of points P2 and P3 reaching the human ear, which are recorded as t0, t1, and t2 respectively. If the frequency band is n+1, it is necessary to calculate the delay tn corresponding to the fn frequency band. Because the higher the frequency, the farther the sound reflection point is from the display device, the greater the delay. After the delay of each frequency band is finally tested, the maximum delay is recorded as tmax, and it is concluded that △tn=tmax-tn.

[0136] In some embodiments, the display device further comprises a base, Figure 45FIG. 1 is a schematic diagram of a three-dimensional structure of a base according to an exemplary embodiment of the present invention, as shown in FIG. Figure 45 As shown, the base 58 includes an inclined portion 83 facing the display device away from the rear shell 39, a sound-emitting structure 59 is arranged inside the inclined portion 83, and a plurality of sound holes 60 are arranged on the surface of the inclined portion 83 corresponding to the position where the sound-emitting structure 59 is located.

[0137] In some embodiments, as Figure 45 As shown, a sound-emitting structure 59 can be disposed within the inclined portion 83 of the base 58. The base 58 has multiple sound-emitting holes 60 on its surface for emitting sound. The inclined portion 83 is inclined toward the display device, away from the rear housing 39, i.e., toward the display side of the display device. Through the multiple sound-emitting holes 60, the sound-emitting structure 59 can emit sound toward the display panel, away from the rear housing 39, i.e., toward the display side of the display device, thereby further optimizing the forward sound output of the display device. Furthermore, based on the high-frequency speaker 56 and the corresponding phase plug in the aforementioned embodiment, the sound-emitting structure 59 in the base 58 can be superimposed to achieve forward sound output from the display device.

[0138] In some embodiments, as Figure 45 As shown, the sound-generating structure 59 may include a high-frequency speaker. In some embodiments, the frequency of the sound emitted by the high-frequency speaker can also be set to be greater than or equal to a preset frequency, such as, but not limited to, 3 MHz. When the sound-generating structure 59 is a high-frequency speaker, the high-frequency speaker can be electrically connected to the interface between the base 58 and the display device via a connecting wire, and electrically connected to the display device through a socket to obtain power for operation. Therefore, by providing a high-frequency speaker in the base 58, the lack of high-frequency sound effects of the display device can be further compensated, effectively improving the sound effects of the high-frequency band of the display device, which is conducive to achieving the full-band sound effects of the display device. In addition, if the display device uses an ultra-thin base 58, the high-frequency speaker can be a ceramic speaker, and the ceramic speaker can be arranged on the surface of the base 58 or the base 58 can be made into a hollow structure and the ceramic speaker can be embedded in the base 58, so that the base 58 has a uniform thickness in appearance.

[0139] In some embodiments, the sound-generating structure 59 may also include a vibrating sheet-like structure, and the sound-generating driver in the display device is mechanically connected to the vibrating sheet-like structure and is used to drive the vibrating sheet-like structure to produce sound. In some embodiments, the middle area of ​​the base 58 may also be hollowed out. For example, after the surface treatment forms the sound outlet 60, a vibrating sheet-like structure is used, such as a structure in which a thin metal sheet is embedded in the base 58. When the base 58 is installed in the display device, the sound-generating driver in the display device is mechanically connected to the vibrating sheet-like structure, driving the thin metal sheet embedded in the base 58 to vibrate and produce sound, thereby achieving the effect of the driver driving the external device to produce sound internally, thereby optimizing the sound effect in front of the display device. It should be noted that the present invention does not limit the specific position of the sound-generating driver in the display device in the display device. For example, the sound-generating driver can be arranged in the cavity between the rear shell 39 and the display device.

[0140] In some embodiments, Figure 46 FIG. 1 is a perspective structural diagram of a display device according to an exemplary embodiment of the present invention. Figure 46 As shown, A is a partially enlarged area. The display device also includes a metal sheet decorative member 61, which is located on the side of the display panel away from the rear housing 39. A sound driver 62 in the display device is connected to the metal sheet decorative member 61 through the space at the bottom of the display device and is used to drive the metal sheet decorative member 61 to produce sound. For example, the sound driver 62 can be arranged in the cavity between the rear housing 39 and the display device.

[0141] In some embodiments, the decorative element at the bottom of the display device, such as the area where the brand logo is located, can be made into a thin metal sheet to form a metal sheet decorative element 61. This metal sheet decorative element 61 extends through the hollow portion of the display device's bottom rear housing 39 and extends to the front of the display device. A sound driver 62, such as an electromagnetic driver, a ceramic vibrator, or a magnetostrictive driver, placed in the cavity between the display device's rear housing 39 and the display panel, drives the metal sheet decorative element 61 to produce sound, thereby achieving the effect of transmitting sound from the internal drive of the device to the external device. The metal sheet decorative element 61 can be made of other materials, such as plastic or a two-shot injection molding of metal and plastic. The shape of the metal sheet decorative element 61 should be designed appropriately based on the frequency characteristics.

[0142] Figure 47 FIG2 is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention. Figure 48 FIG1 is a schematic cross-sectional view of a display device according to an exemplary embodiment of the present invention. Figure 47 and Figure 48On the basis of the above embodiment, the display device also includes a rear shell 39 and a second sound exciter 602, the second vibration output terminal of the second sound exciter 602 is fixed to the rear shell 39, and the second sound exciter 602 is used to excite the rear shell 39 to vibrate through the second vibration output terminal.

[0143] In some embodiments, the display device is in a vibrating state when emitting sound. When the display device's housing is a single rear housing 39, because the area of ​​the rear housing 39 is comparable to that of the screen, a certain resonance is inevitably generated. This resonance frequency is the same as the frequency of the screen and is also within the audible frequency band. Therefore, the sound emitted by the rear housing 39 is also audible to the user, generating a similar noise. To eliminate this noise, some embodiments of the present invention provide a second sound exciter 602 on the rear housing 39. The second sound exciter 602 is used to excite the rear housing 39 to vibrate, distinguishing between the first sound exciter 6 that drives the screen to emit sound and the second sound exciter 602 that drives the rear housing 39 to emit sound. The first sound exciter 6 and the second sound exciter 602 can be arranged in opposite directions, i.e., the first sound exciter 6 for screen vibration is attached to the sound plate 5, while the second sound exciter 602 for rear housing 39 vibration is attached to the rear housing 39. Thus, by using different sound exciters to counter-vibrate the sound plate 5 and the rear housing 39, the noise generated by the resonance between the rear housing 39 and the display device is improved.

[0144] When screen vibration causes vibration in the rear housing 39, the amount of vibration in the rear housing 39 can be reduced by identifying the point of maximum or larger vibration and applying a driving force for reverse vibration there. The vibration mode transmitted from the panel vibration to the rear housing 39 is non-linear, manifesting in two aspects: one is amplitude. For example, the vibration amplitude of a 100Hz panel is 0.2mm, and the amplitude of a 1000Hz panel is 0.05mm. However, after transmission to the rear housing 39, the 100Hz vibration amplitude may be amplified to 0.4mm by resonance. Since the resonance of the rear housing 39 is mainly concentrated at the low frequency end, the 1000Hz vibration may be attenuated to 0.02mm. Furthermore, because the transmission from the screen to the rear housing 39 passes through the complex relationship of the middle frame structure, screws, etc., in addition to the aforementioned amplitude difference, there is also a phase difference. For example, the phase difference at 100Hz is 180°, that is, the rear housing 39 and the screen are in opposite directions, while the phase difference at 1000Hz is only 120°.

[0145] The above-mentioned vibration amplitude and phase relationship are not fixed, and they will change with the overall structure and material of the display device. The maximum amplitude area is obtained through testing, and the correlation between the amplitude, phase and screen vibration of the maximum vibration area is determined, so as to obtain the correlation function F(x) between the second sound exciter 602 of the rear shell 39 and the first sound exciter 6 of the screen, and the F(x) processing is applied to the signal processing link where the second sound exciter 602 of the vibrating rear shell 39 is located. To implement F(x), the frequency points at which the rear housing 39 vibrates are determined through testing. Assuming n frequency points with maximum vibration, filters f0, f1, f2, ..., fn are set around the vibration frequency. The vibration spectrum characteristics of the rear housing 39 within each frequency band are measured and subtracted from the signal characteristics of the second acoustic actuator 602 at the same frequency. This yields the frequency domain transfer function of the vibration from the second acoustic actuator 602 to the rear housing 39 within this frequency band. The time delay from the second acoustic actuator 602 to the rear housing 39 at the center frequency of this band is then measured to obtain Δt. By summing these multiple frequency bands, the vibration transfer function from the second acoustic actuator 602 to the rear housing 39 within the entire frequency response range is obtained.

[0146] Figure 49 FIG2 is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention. Figure 50 FIG1 is a front view structural diagram of another display device according to an exemplary embodiment of the present invention. Figure 49 and Figure 50 , the second sound exciter 602 can be set at a preset position on the rear shell 39; wherein the vibration amplitude test value of the preset position is greater than the preset test value.

[0147] In some embodiments, only the first sound exciter 6 can be used to excite the sound plate 5 to vibrate, and no sound exciter is set on the back shell 39. At this time, the vibration amplitude of different areas on the back shell 39 is tested to obtain a specific position on the back shell 39 where the vibration amplitude test value is greater than the preset test value, and the second sound exciter 602 is set at the aforementioned position. It should be noted that some embodiments of the present invention do not specifically limit the preset test value, and the preset test value can be set according to the specific sound requirements of the display device. Therefore, by setting the second sound exciter 602 at a preset position on the back shell 39, the vibration amplitude test value of the preset position is greater than the preset test value, so that the second sound exciter 602 is arranged in an area with a larger vibration amplitude and an area with the largest vibration amplitude. Different sound exciters can be used to target the reverse vibration of the sound plate 5 and the back shell 39, thereby minimizing the noise generated by the resonance between the back shell 39 and the screen.

[0148] For example, the arrangement area of ​​the second sound driver 602 on the rear housing 39 can be as follows: Figure 47The shown one is a single point, it can also be Figure 49 and Figure 50 What is shown are multiple points, which may be distributed symmetrically or asymmetrically within the plane where the screen is located, and some embodiments of the present invention do not make specific limitations on this.

[0149] In some embodiments, Figure 51 FIG. 1 is a front view structural diagram of another display device according to an exemplary embodiment of the present invention. Figure 51 As shown, the rear shell 39 is provided with a plurality of reinforcing ribs on the surface near the sound plate 5, and the reinforcing ribs are unevenly distributed. In some embodiments, in order to ensure smaller vibration of the rear shell 39, some processing is required on the rear shell 39 to limit the rear shell 39 from generating larger resonance. Figure 52 This is a front view of another display device according to an exemplary embodiment of the present invention. In order to meet the requirements of flatness and rigidity, a mesh reinforcement rib is added to a large area of ​​the same thickness inside the rear shell 39. Figure 52 As shown, the thick dotted lines indicate the reinforcing ribs with higher heights, while the thin dotted lines indicate the reinforcing ribs with smaller heights. Traditional reinforcing ribs adopt a regular square or rectangular continuous grid structure. Such reinforcing ribs are simple in design and can ensure the uniformity of the thickness of the back shell 39. However, because of the fixed equal-interval division, the back shell 39 is prone to produce a fixed loudness resonant frequency.

[0150] In order to reduce this resonance, some embodiments of the present invention propose a rib structure with non-uniform spacing and fixed shape. Figure 51 As shown, Figure 51 The lines corresponding to the area where the rear shell is located represent reinforcement ribs, which can be set in the rear shell 39 area as shown in FIG. Figure 51 The reinforcing ribs are arranged in a trapezoidal pattern as shown in the upper left corner, or the rear shell 39 area may be provided with the following Figure 51 The honeycomb-shaped reinforcement ribs shown in the upper right corner may have different hexagonal areas, or may be arranged in the rear shell 39 area as shown in FIG. Figure 51 The reinforcing ribs are arranged in a non-uniformly spaced rectangular pattern as shown in the lower left corner, or the rear shell 39 area may be provided with the following Figure 51 The lower right corner area shown in the figure has an irregular polygonal arrangement of reinforcing ribs.

[0151] Alternatively, higher ribs can be Figure 51The ribs are shown as oblique straight lines, or as sawtooth or wavy lines. The specific implementation of the non-uniform arrangement of the reinforcing ribs in some embodiments of the present invention is not limited. The use of non-uniformly distributed reinforcing ribs can maximize the destruction of the vibration mode of the rear shell 39, reduce the resonance amplitude of the rear shell 39, and improve the fixed loudness resonant frequency generated by the rear shell 39, thereby achieving the purpose of reducing vibration noise. Referring to the above embodiments, the maximum vibration amplitude point can also be tested through simulation or actual prototypes. By changing the shape of the rear reinforcing ribs at the position of large vibration amplitude or maximum vibration amplitude, the vibration mode of the rear shell 39 can be maximized, the resonance amplitude of the rear shell 39 can be reduced, and the purpose of reducing vibration noise can be achieved.

[0152] In some embodiments, as Figure 51 As shown, at least part of the reinforcing ribs are set to change in height relative to the rear shell 39; and / or at least part of the reinforcing ribs are set to change in width perpendicular to the extending direction of the reinforcing ribs 39, that is, only at least part of the reinforcing ribs can be set to change in height relative to the rear shell 39, or only at least part of the reinforcing ribs can be set to change in width perpendicular to the extending direction of the reinforcing ribs 39, or at least part of the reinforcing ribs can be set to change in both height and width relative to the rear shell 39. For example, the change in the height of the reinforcing ribs is, for example, Figure 51 The height of the obliquely arranged reinforcing ribs relative to the rear shell 39 changes, that is, the height of the reinforcing ribs relative to the edge of the rear shell 39 fluctuates; for example, the width of the reinforcing ribs changes, for example Figure 51 The width of the obliquely arranged reinforcing ribs is continuously changed perpendicular to the oblique extending direction thereof.

[0153] In some embodiments, because the reinforcement ribs have fixed spacing, fixed height or fixed width, they themselves have a certain resonant frequency. When the resonant frequency is within the audible range and is excited by the vibration of the screen, resonance noise is likely to occur. Figure 51 The illustrated reinforcement rib design includes at least a portion of the reinforcement ribs having a variable height relative to the rear housing 39; and / or at least a portion of the reinforcement ribs having a variable width perpendicular to the direction in which the reinforcement ribs 39 extend. This allows the reinforcement ribs to have varying heights or widths, disrupting or reducing the natural resonant frequency of the rear housing 39. This allows the resonant frequency of the rear housing 39 to be more dispersed and not to have a maximum value at a certain frequency point, thereby reducing resonant noise and reducing the requirements placed on the second sound exciter 602 of the rear housing 39 and the software algorithm F(x) for the audio processor of the display device chip. It should be noted that the reinforcement ribs may be rectangular, wavy, or tilted straight lines, and some embodiments of the present invention do not specifically limit the shape of the reinforcement ribs.

[0154] In some embodiments, Figure 53FIG2 is a front view schematic diagram of another display device according to an exemplary embodiment of the present invention. Figure 54 FIG1 is a front view structural diagram of another display device according to an exemplary embodiment of the present invention. Figure 53 and Figure 54 The rear shell 39 is non-uniformly divided into multiple shells 43 , and adjacent shells 43 are fixed by a viscous buffer structure 44 .

[0155] In some embodiments, the vibration of the back cover 39 mostly occurs in the low frequency band, and the back cover 39 of a general display device is generally designed as a whole, and its area is comparable to the screen, which is very prone to low-frequency resonance. Figure 53 As shown, the back shell 39 is divided into two sections, and the two sections of the back shell 39 are connected in a staggered manner and fixed by a viscous buffer structure 44, such as double-sided foam glue. In this way, the back shell 39 is divided into two areas, and the area is reduced by half compared to the original area, so that the back shell 39 as a whole cannot achieve uniform resonance, and resonance cannot be formed in the center area of ​​the back shell 39 where the vibration is weakest. According to this method, the back shell 39 can also be divided into two parts in the horizontal direction, such as Figure 54 As shown, the rear shell 39 can also be divided into multiple sections, such as three sections or four sections.

[0156] 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, providing users with an integrated audio-visual experience in which the sound comes from the image, overcoming the industry bottleneck problem of the difficulty of achieving sound on LCD screens. In addition, the use of multiple high-frequency speakers set on the frame of the display device makes up for the shortcomings of the high-frequency sound effect of the display device, effectively improving the sound effect of the high-frequency band of the display device, which is conducive to achieving the full-band sound effect of the display device. In addition, the use of elastic support members avoids abnormal collision noise and improves the efficiency of vibration transmission.

[0157] 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. In addition, the same and similar parts between the embodiments of the present invention can be referenced with each other, and the relevant content will not be repeated. Some embodiments of the present invention do not list all possible combinations. Any combination of the technical features in the embodiments of the present invention also falls within the scope of protection 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 17; sound exciter 6 combined with sound board 5 combined with light board; sound exciter 6 combined with sound board 5 combined with light bar; sound exciter 6 combined with sound board 5 combined with light board combined with elastic support 17; high and low frequency speakers combined with different embodiments, etc.

[0158] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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.

[0159] For ease of explanation, the above description has been presented 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. Based on the above teachings, various modifications and variations are possible. The above embodiments have been selected and described to better explain the principles and practical applications, thereby enabling those skilled in the art to better utilize the embodiments and various variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: include: Display panel, backlight module, sound board, sound exciter, multiple elastic support members and rear shell; The backlight module is located on one side of the display panel. A second annular sealing structure is provided between the backlight module and the display panel at a position corresponding to the frame of the display panel, so that the backlight module and the display panel form a sealed air cavity. The sound 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 plate away from the backlight module, and the sound exciter is used to excite the sound plate to vibrate through the vibration output terminal to drive the backlight module to vibrate; The elastic support member is interference-connected between the backlight module and the display panel; A plurality of high-frequency speakers are arranged on the frame of the display device, and the high-frequency speakers are symmetrically distributed about the central axis of the display device.

2. The display device according to claim 1, wherein A phase plug is provided on the sound output surface of the high-frequency speaker, and the phase plug is used to make the high-frequency speaker emit sound in a direction where the display panel is away from the rear housing.

3. The display device according to claim 1, wherein Also includes: The base includes an inclined portion facing the display panel away from the rear shell, a sound-generating structure is provided inside the inclined portion, and a plurality of sound holes are provided on the surface of the inclined portion corresponding to the position of the sound-generating structure.

4. The display device according to claim 1, wherein Also includes: A second sound-generating exciter, wherein a second vibration output terminal of the second sound-generating exciter is fixed to the rear shell, and the second sound-generating exciter is used to excite the rear shell to vibrate through the second vibration output terminal.

5. The display device according to claim 1, wherein A plurality of reinforcing ribs are provided on a surface of the rear shell adjacent to the middle frame structure, and the reinforcing ribs are unevenly distributed.

6. The display device according to claim 1, wherein The backlight module comprises a plurality of light-emitting structures on a side adjacent to the display panel, and the elastic support member is located between the light-emitting structures; A welding structure is provided on a side of the elastic support member adjacent to the sound exciter, and the elastic support member is fixed by welding through the welding structure.

7. The display device according to claim 1, wherein The backlight module comprises a plurality of light-emitting structures on a side adjacent to the display panel. The light-emitting structures are covered with the elastic supporting members, which are light-guiding elastic supporting members.

8. The display device according to claim 7, wherein: The display panel includes a display film layer and an optical diffusion film layer, wherein the display film layer is located on a side of the optical diffusion film layer away from the backlight module, and the optical diffusion film layer includes an optical film and a diffusion plate, wherein the diffusion plate is located on a side of the optical film away from the display film layer; At least one multifunctional optical adhesive structure is arranged between the optical film and the diffuser plate, and the multifunctional optical adhesive structure is arranged corresponding to at least one of the light-emitting structures. The multifunctional optical adhesive structure includes a convex lens structure and / or a large-angle filter film layer.

9. A display device, characterized in that: include: Display panel, backlight module, sound board, sound exciter, multiple elastic support members and rear shell; The backlight module is located on one side of the display panel. A second annular sealing structure is provided between the backlight module and the display panel at a position corresponding to the frame of the display panel, so that the backlight module and the display panel form a sealed air cavity. The sound 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 plate away from the backlight module, and the sound exciter is used to excite the sound plate to vibrate through the vibration output terminal to drive the backlight module to vibrate; The elastic support member is interference-connected between the sound-generating plate and the display panel; A plurality of high-frequency speakers are arranged on the frame of the display device, and the high-frequency speakers are symmetrically distributed about the central axis of the display device.

10. The display device according to claim 9, wherein The backlight module comprises a plurality of light-emitting structures on a side adjacent to the display panel, and the elastic support member is located between the light-emitting structures; A fixing plate is provided on the side of the backlight module adjacent to the display panel, and a plurality of positioning holes are provided on the fixing plate. A plurality of through-mounting holes are provided on the backlight module, and the positioning holes are used to fix the elastic support member in the through-mounting holes and on the sound plate.

11. The display device according to claim 9, wherein A phase plug is provided on the sound output surface of the high-frequency speaker, and the phase plug is used to make the high-frequency speaker emit sound in a direction where the display panel is away from the rear housing.

12. The display device according to claim 9, wherein Also includes: The base includes an inclined portion facing the display panel away from the rear shell, a sound-generating structure is provided inside the inclined portion, and a plurality of sound holes are provided on the surface of the inclined portion corresponding to the position of the sound-generating structure.

13. The display device according to claim 9, wherein Also includes: A second sound-generating exciter, wherein a second vibration output terminal of the second sound-generating exciter is fixed to the rear shell, and the second sound-generating exciter is used to excite the rear shell to vibrate through the second vibration output terminal.

14. The display device according to claim 9, wherein A plurality of reinforcing ribs are provided on a surface of the rear shell adjacent to the middle frame structure, and the reinforcing ribs are unevenly distributed.

15. The display device according to claim 9, wherein The backlight module comprises a plurality of light-emitting structures on a side adjacent to the display panel, and the elastic support member is located between the light-emitting structures; A welding structure is provided on a side of the elastic support member adjacent to the sound exciter, and the elastic support member is fixed by welding through the welding structure.

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