Display device

Abstract

The present application discloses a display device including: a display panel configured to display image information; the backlight assembly comprises a lamp panel, the lamp panel is configured to provide backlight for the display panel, and a cavity is formed between the lamp panel and the display panel; at least part of the structure of the back plate is arranged on one side, opposite to the display panel, of the lamp panel; the exciter comprises a coil assembly, the coil assembly is in a plane shape, and the coil assembly is arranged on the side, away from the display panel, of the lamp panel; the coil assembly is arranged on the back plate, the magnetic assembly is arranged on the back plate and faces the coil assembly, and the coil assembly and the magnetic assembly are configured to drive the display panel to vibrate and produce sound through electromagnetic induction of the coil assembly and the magnetic assembly. According to the display device, the coil assembly performs surface driving on the lamp panel, the vibration conduction efficiency can be remarkably improved, the display panel can bear higher power driving, and the sound production effect is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device. Background Technology

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

[0003] In related technologies, display devices include structures such as display panels, lamp panels, and electromagnetic exciters. The vibration energy of the electromagnetic exciter is transmitted to the display panel through the lamp panel and the cavity between the lamp panel and the display panel, thereby enabling the display panel to vibrate and generate sound.

[0004] However, because the electromagnetic exciter for transmission is located at a certain point on the lamp panel, the efficiency of vibration energy transmission is low, and the local pressure on the display panel is relatively high, which is not conducive to improving vibration energy and thus improving the sound effect. Utility Model Content

[0005] Some embodiments of this application provide a display device that can significantly improve the transmission efficiency of vibration energy, reduce attenuation, and improve the sound emission effect of the display panel.

[0006] Some embodiments of this application provide a display device, including: a display panel configured to display image information; a backlight assembly including a lamp board configured to provide backlight to the display panel, wherein a cavity is formed between the lamp board and the display panel; a back plate, at least a portion of which is disposed on the side of the lamp board facing away from the display panel; and an actuator including: a coil assembly, which is planar and disposed on the side of the lamp board facing away from the display panel; and a magnetic assembly disposed on the back plate and facing the coil assembly, wherein the coil assembly and the magnetic assembly are configured to drive the lamp board to vibrate through their own electromagnetic induction, thereby causing the display panel to vibrate and produce sound.

[0007] According to the display device of this application, a planar coil assembly is disposed on the lamp board, and a magnetic assembly is disposed on the back plate. After being energized, the coil assembly is subjected to a constantly changing force in the magnetic field generated by the magnetic assembly, thereby driving the display panel to vibrate sequentially through the lamp board and the cavity, causing the display panel to produce sound. Compared with the scheme of using an electromagnetic exciter to generate bending wave vibration at a certain point on the lamp board, the planar coil assembly has a larger coverage area on the lamp board, and the driving force generated is uniform across the entire plane of the lamp board. That is, the coil assembly drives the lamp board from a surface. On the one hand, it enables the vibration of the lamp board to be planar displacement vibration (i.e., the entire lamp board moves back and forth, rather than a part of the lamp board forming an edge), i.e., piston vibration, which can significantly improve the transmission efficiency of vibration energy and reduce attenuation. On the other hand, the display panel is subjected to uniform force, so the pressure on the screen is much lower than that of point drive, and it can withstand greater power drive, thereby further improving the sound production effect of the display panel.

[0008] In some embodiments, the coil assembly includes a conductive coil disposed on the lamp panel, and the magnetic assembly includes a magnetic element, with the conductive coil surrounding the magnetic element.

[0009] In some embodiments, there are multiple magnetic elements, which are spaced apart on the back plate along a first direction. The magnetic properties of two adjacent magnetic elements are opposite and form a closed magnetic circuit. The multiple magnetic elements form several placement gaps, and at least one edge of the conductive coil passes through several placement gaps in sequence to surround the multiple magnetic elements.

[0010] In some embodiments, the magnetic component further includes a magnetic conductor connected to the back plate, and the magnetic component is fixedly disposed on the magnetic conductor.

[0011] In some embodiments, the lamp panel includes: a base layer having a first side facing the display panel and a second side facing away from the display panel; a first circuit layer disposed on the first side, the first circuit layer having an array of light sources arranged on the first circuit layer for projecting light onto the display panel; and a coil assembly constituting a second circuit layer disposed on the second side.

[0012] In some embodiments, the lamp panels are multiple lamps arranged in an array, and the exciter is disposed on at least a portion of the multiple lamp panels. The exciter is configured to drive any one of the at least a portion of the lamp panels to vibrate independently, or the exciter is configured to drive the at least a portion of the lamp panels to vibrate synchronously.

[0013] In some embodiments, there are multiple lamp panels arranged in an array, and each of the multiple lamp panels is provided with the coil assembly. The number of magnetic components is less than the number of coil assemblies, and the magnetic components and some of the coil assemblies on the lamp panels together form the exciter.

[0014] In some embodiments, the display device further includes a buffer connector disposed between the lamp panel and the back panel, wherein the lamp panel is connected to the back panel via the buffer connector.

[0015] In some embodiments, the buffer connector is double-sided foam tape, and / or the buffer connector is disposed at the splicing position of two adjacent light panels.

[0016] In some embodiments, the display device further includes: a mid-frame disposed around the display panel and the back panel; a first seal disposed around the display panel to seal the gap between the display panel and the mid-frame; and a second seal disposed around the lamp panel to seal the gap between the lamp panel and the back panel. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a display device according to some embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the structure of a display device according to some embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the structure of the exciter of a display device according to some embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the structure of the coil assembly of the exciter in some embodiments of this application;

[0022] Figure 5 This is a schematic diagram of the structure of the magnetic component of the exciter in some embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the structure of the lamp panel in some embodiments of this application;

[0024] Figure 7This is a schematic diagram showing the layout of the exciter on the lamp board in some embodiments of this application;

[0025] Figure 8 This is a schematic diagram showing the layout of the exciter on the lamp board in some embodiments of this application;

[0026] Figure 9 This is a schematic diagram showing the layout of the exciter on the lamp board in some embodiments of this application;

[0027] Figure 10 This is a schematic diagram illustrating an operational scenario between a display device and a control device, as shown in an embodiment of this application.

[0028] Figure 11 This is a configuration block diagram of a display device shown in an embodiment of this application;

[0029] Figure 12 This is a schematic diagram of the structure of a display device in related technologies.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10 - Display devices; 20 - Smart devices; 30 - Servers;

[0032] 100 - Display panel; 110 - Optical film assembly;

[0033] 200-Backlight assembly;

[0034] 210 - Lamp board; 211 - Buffer connector;

[0035] 230 - Board body; 240 - Light source; 231 - Base layer; 232 - First circuit layer; 233 - Second circuit layer;

[0036] 300 - Support component;

[0037] 400-Actuator;

[0038] 410 - Coil assembly; 450 - Magnetic assembly; 452 - Magnetic component; 451 - Magnetic conductor;

[0039] 500-backplate;

[0040] 600 - Middle frame; 611 - First seal; 612 - Second seal;

[0041] 900 - Control device; 901 - Tuner / Demodulator; 902 - Communicator; 903 - Detector; 904 - External device interface; 905 - Controller; 906 - Display; 907 - Audio output interface; 908 - Memory; 909 - Power supply; 910 - User interface;

[0042] M - cavity. Detailed Implementation

[0043] With the development of technology and the improvement of people's living standards, display devices are increasingly used in people's work and life. In related technologies, display devices include structures such as display panels, lamp panels, and electromagnetic exciters. The vibration energy of the electromagnetic exciter is transmitted to the display panel through the lamp panel and the cavity between the lamp panel and the display panel, enabling the display panel to vibrate and generate sound. However, because the electromagnetic exciter is located at a specific point on the lamp panel, the electromagnetic exciter electrically drives the lamp panel, resulting in bending wave vibration. Furthermore, the need for components such as a sound-generating plate to transmit the vibration energy leads to low energy transmission efficiency. Additionally, the display panel experiences relatively high local pressure, which is detrimental to increasing vibration energy and thus improving the sound generation effect.

[0044] In view of this, this application provides a display device in which a planar coil assembly is disposed on a lamp plate and a magnetic assembly is disposed on a back plate. When energized, the coil assembly is subjected to a constantly changing force in the magnetic field generated by the magnetic assembly, thereby driving the display panel to vibrate through the lamp plate and the cavity in sequence, so that the display panel produces sound. On the one hand, the planar coil assembly can significantly improve the transmission efficiency of vibration energy and reduce attenuation. On the other hand, the display panel is subjected to uniform force, so that the pressure on the screen is much less than that of point drive, and it can withstand greater power drive, thereby further improving the sound production effect of the display panel.

[0045] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0046] The display device 10 in this embodiment can be a liquid crystal display device. Alternatively, the display device 10 can be a Mini-LED display device. Compared to the LED backlight in an OLED display device, the backlight in a Mini-LED display device has greater rigidity, allowing the exciter 400 to drive the entire Mini-LED backlight to vibrate together. The display device can have various implementation forms, such as a television, smart television, monitor, electronic whiteboard, or electronic table.

[0047] Figure 10 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to an exemplary embodiment of this application. Figure 10As shown, a user can operate the display device 10 via the smart device 20 or the control device 900. In some embodiments, the display device 10 also communicates with the server 30. The display device 10 may communicate via a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 30 can provide various content and interactive features to the display device 10. The server 30 may be a cluster or multiple clusters, and may include one or more types of servers.

[0048] Figure 11 This is a schematic diagram of the device structure shown in an example, such as... Figure 11 As shown, the display device 10 includes a tuner / demodulator 901, which receives broadcast television signals via wired or wireless means, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals.

[0049] In some embodiments, the display device 10 includes a controller 905. In some embodiments, the controller includes a processor, a video processor, an audio processor, a graphics processor, RAM, ROM, and a first to an nth interface configured as input / output.

[0050] In some embodiments, the display device 10 includes an audio output interface 907.

[0051] In some embodiments, the display device 10 includes a memory 908.

[0052] In some embodiments, the display device 10 includes a power supply 909.

[0053] In some embodiments, the display device 10 includes a display 906, which includes a display screen component configured to present an image, a driving component for driving the image display, a component configured to receive image signals from a controller output, and a user control UI interface for displaying video content, image content, menu control interface, and user control UI interface.

[0054] The display 906 can be a liquid crystal display, an OLED display, or a projection display, and can also be a projection device and a projection screen.

[0055] In some embodiments, the display device 10 includes a communicator 902, which is a component configured to communicate with external devices or servers according to various communication protocol types. For example, the communicator 902 may include at least one of a Wi-Fi module, a Bluetooth module, a wired Ethernet module, or other network communication protocol chips or near-field communication protocol chips, as well as an infrared receiver. The display device 10 can establish the transmission and reception of control signals and data signals with the control device 900 or the server 30 through the communicator 902.

[0056] In some embodiments, the display device 10 includes at least one of the user interfaces 910, which can be configured to receive control signals from a control device 900 (e.g., an infrared remote control).

[0057] In some embodiments, the display device 10 includes a detector 903 configured to acquire signals from the external environment or interactions with the outside world. For example, the detector 903 may include a light receiver configured to acquire a sensor for ambient light intensity; or, the detector 903 may include an image acquisition device, such as a camera, configured to acquire external environmental scenes, user attributes, or user interaction gestures; or, the detector 903 may include a sound acquisition device, such as a microphone, configured to receive external sounds.

[0058] In some embodiments, the display device 10 includes an external device interface 904, which may include, but is not limited to, one or more interfaces such as: High Definition Multimedia Interface (HDMI), analog or data high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0059] In some embodiments, the controller 905 and the tuner 901 may be located in different separate devices, that is, the tuner 901 may also be located in an external device of the main device where the controller 905 is located, such as an external set-top box.

[0060] The controller 905 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 905 controls the overall operation of the display device 10. For example, in response to receiving a user command configured to select a UI object to display on the monitor 906, the controller 905 can perform operations related to the object selected by the user command.

[0061] In some embodiments, the controller includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (random access memory), ROM (read-only memory), a first to an nth interface configured as input / output, a communication bus, etc.

[0062] Users can input commands through a graphical user interface (GUI) displayed on monitor 906, and the user input interface receives the user input commands through the GUI. Alternatively, users can input commands by entering specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0063] A "user interface" is the medium through which an application or operating system interacts and exchanges information with the user. It converts information from its internal form to a form that the user can accept. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0064] The display device 10 has a top side, a bottom side, a left side, a right side, a front side, and a rear side. The left and right sides of the display device 10 refer to the left and right sides of the user when the user is facing the display surface of the display device 10. Correspondingly, the side of the display device 10 facing the user is the front side, the side of the display device 10 away from the user is the rear side, the top side of the display device 10 is the top side, and the bottom side of the display device 10 is the bottom side.

[0065] refer to Figure 1 and Figure 2 The display device 10 includes a display panel 100, which is used to display text, images, and other image information. The display panel 100 includes a display area and a circuit board located on one side of the display area. The circuit board drives the entire display panel 100. The display panel 100 is the main component of the display device 10, and it mainly includes a liquid crystal display panel 100. The liquid crystal display panel 100 includes a color filter (CF) substrate, a thin film transistor (TFT) substrate (also called an array substrate), and a liquid crystal (LC) layer, which is located between the color filter substrate and the array substrate. The TFT substrate has data lines and scan lines. The orientation of the liquid crystal molecules is controlled by whether the data lines and scan lines are energized, so that the light from the light source 240 is emitted through the color filter substrate and a preset color image is generated.

[0066] Since the liquid crystal display panel 100 itself cannot emit light, in order for the display device 10 to display normally, the display device 10 also includes a backlight assembly 200. The backlight assembly 200 can be a direct-lit backlight assembly 200, which includes a lamp board 210. The lamp board 210 is disposed on the side opposite to the display surface of the display panel 100. The lamp board 210 is configured to generate light and provide backlight to the display panel 100. It is understood that the lamp board 210 is responsible for providing sufficient brightness and uniform backlight to the display panel 100. The display panel 100 can modulate the backlight as needed to display different images. There is a cavity M between the lamp board 210 and the display panel 100, and the cavity M contains gas.

[0067] In some embodiments, combined with Figure 1 and Figure 2 The light panel 210 may include the panel body 230;

[0068] In some embodiments, combined with Figure 1 and Figure 2 The lamp panel 210 may include a light source 240;

[0069] The board body 230 can be an aluminum plate, a printed circuit board (PCB), etc. The light source 240 can be a light-emitting diode (LED), a mini-light-emitting diode (Mini LED), or a micro-light-emitting diode (Micro LED).

[0070] There can be multiple light sources 240, and the multiple light sources 240 are arranged at intervals on the side of the board body 230 facing the display panel 100, so that the light sources 240 provide backlight for the display panel 100. Among them, the light sources 240 can be lamp beads or lamp strips, etc., and multiple light sources 240 can be fixed on the board body 230 by means of snap-fit, threaded connection, etc.

[0071] The display device 10 also includes a back plate 500, which is disposed on the side of the backlight assembly 200 opposite to the display panel 100, i.e., the back plate 500 is disposed behind the lamp panel 210. The back plate 500 can be used to support the backlight assembly 200 and the display panel 100. The back plate 500 can be made of aluminum alloy, steel, etc., to provide effective support.

[0072] In some embodiments, the display 906 includes a display panel 100 and a backlight assembly 200;

[0073] refer to Figures 3-5The display device 10 also includes an actuator 400. The actuator 400 includes a coil assembly 410 and a magnetic assembly 450. The coil assembly 410 is planar; here, "planar" means that when the coil assembly is wound with multiple turns, the multiple turns are on the same plane, not stacked. The coil assembly 410 is located on the side of the lamp panel 210 facing away from the display panel 100. The magnetic assembly 450 is located on the back plate 500 and faces the coil assembly 410. The magnetic assembly 450 is used to generate a magnetic field. The coil assembly 410 and the magnetic assembly 450 are configured to drive the display panel 100 to vibrate and produce sound through their own electromagnetic induction. For example, when the magnetic assembly 450 generates a magnetic field, by inputting a constantly changing current into the coil assembly 410, the force exerted on the coil assembly 410 in the magnetic field generated by the magnetic assembly 450 changes continuously, thereby generating vibration. That is, the coil assembly 410 constitutes the actuator of the lamp panel 210.

[0074] The cavity M can be in a sealed state. In this case, the sealed cavity M can be equivalent to a damping spring. When the coil assembly 410 vibrates, it transfers the vibration energy to the lamp plate 210. The lamp plate 210 compresses the gas in the cavity M. In this way, the gas can transfer the vibration energy to the display panel 100, so as to drive the display panel 100 to vibrate. The display panel 100 emits sound through the sound waves emitted by the vibration, so that the display panel 100 can be used for display and can also be used to replace the speaker to produce sound.

[0075] Of course, this application is not limited to this. The cavity M can also be in a non-sealed state. In this case, a support member 300 (i.e., the support member 300 below) can be provided between the lamp plate 210 with the exciter 400 and the display panel 100. The support member 300 is used to transfer the vibration energy from the lamp plate 210 to the display panel 100 to drive the display panel 100 to vibrate and produce sound. It can be understood that even if the cavity M is in a sealed state, the support member 300 can be provided to improve the vibration transmission efficiency and keep the gap of the cavity M stable.

[0076] Since light sources such as sub-millimeter light-emitting diodes (e.g., Mini-LEDs) have a more compact size, the cavity M between the lamp board 210 and the liquid crystal display panel can have a smaller gap, thereby reducing the thickness of the cavity M and improving the vibration transmission effect of the cavity M. Therefore, in this embodiment, the light source of the backlight module is described as a sub-millimeter light-emitting diode (Mini-LED).

[0077] For example, the gap of cavity M can be 0.3mm to 10mm, with a maximum gap of 10mm. Alternatively, the gap of cavity M can be 0.3mm or 1mm, etc. For instance, when the gap of cavity M is 1mm, the thickness of cavity M is relatively small, which can improve the transmission efficiency of the vibration force output by the exciter. Or, when the gap of cavity M is 0.3mm, the distance between the exciter 400 and the display panel 100 is closer, resulting in stronger vibration and better sound production. When the gap of cavity M is 10mm, the thickness of cavity M is relatively large, which can prevent the display panel 100 and the light source 240 from colliding at a certain position during vibration. Specifically, the gap of cavity M can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. It should be noted that the values ​​and ranges involved in the embodiments of this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0078] According to some embodiments of the present application, the display device 10 has a planar coil assembly 410 disposed on the lamp plate 210 and a magnetic assembly 450 disposed on the back plate 500. When the coil assembly 410 is energized, it can be subjected to a constantly changing force in the magnetic field generated by the magnetic assembly 450, thereby driving the display panel 100 to vibrate through the lamp plate 210 and the cavity M in sequence, so that the display panel 100 emits sound. Compared to the method where the electromagnetic exciter 400 is located at a certain point on the lamp panel 210 to form a bending wave vibration, the planar coil assembly 410 covers a larger area of ​​the lamp panel 210, and the driving force generated is uniform across the entire plane of the lamp panel 210. That is, the coil assembly 410 drives the lamp panel 210 from the surface. On the one hand, this enables the vibration of the lamp panel 210 to be planar displacement vibration (i.e., the lamp panel 210 as a whole moves back and forth, rather than a part of the lamp panel 210 forming an edge), i.e., piston vibration, which can significantly improve the transmission efficiency of vibration energy and reduce attenuation. On the other hand, the display panel 100 is subjected to uniform force, so the pressure on the screen is much less than that of point drive, and it can withstand greater power drive, thereby further improving the sound effect of the display panel 100.

[0079] Understandably, because the planar coil assembly 410 has a large distribution range on the lamp board 210, the heat distribution of the coil assembly 410 is uniform during operation, and the temperature of the lamp board 210 is more balanced. The power per unit area can be reduced by two orders of magnitude compared with the electromagnetic exciter 400. This avoids the influence of the temperature concentration point on the local light emission brightness and color of the backlight assembly 200 when using the electromagnetic exciter 400.

[0080] Furthermore, the planar shape of the coil assembly 410 reduces the space occupied by the exciter 400, allowing for a flatter backplate 500 structure and fewer protruding structures. This further satisfies the pursuit of a thinner and lighter display device 10, facilitating a large-area ultra-thin design for the overall appearance of the display device 10. Moreover, the planar coil assembly 410 has an ultra-thin thickness, is non-inductive, and has no back electromotive force, making it easy to work with power amplifiers. Compared to point-driven amplifiers, it offers better high-frequency response, lower distortion, sound diffusion, and sound field effects.

[0081] In some embodiments, combined with Figures 1-4 The coil assembly 410 may include a conductive coil, which can be a regular ring shape, such as square or circular, or an irregular shape. The conductive coil is disposed on the lamp panel 210. For example, the conductive coil can be fixed to the lamp panel 210 by adhesive bonding, or the conductive coil can be integrally formed with the lamp panel 210. The structure of the conductive coil can be reasonably selected according to actual needs. The magnetic assembly 450 includes a magnetic element 452, around which the conductive coil surrounds the magnetic element 452. The number of magnetic elements 452 can be reasonably set according to actual needs. The magnetic element 452 can be a permanent magnet, and the magnetic pole direction of the magnetic element 452 is perpendicular to the back plate 500. The magnetic field generated by the magnetic element 452 can be called a static magnetic field. The material of the magnetic element 452 can be ferromagnetic materials, soft magnetic materials, etc., known to those skilled in the art. Both the coil and the magnetic element 452 can be of types known to those skilled in the art, and this embodiment does not impose any limitations.

[0082] Thus, by cooperating with the conductive coil and the magnetic component 452, when a changing current is passed through the conductive coil, the conductive coil can be subjected to a force with a constantly changing direction in the magnetic field generated by the magnetic component 452, thereby achieving the purpose of driving the lamp board 210 to vibrate.

[0083] In some embodiments, there may be multiple magnetic elements 452 to increase the magnetic field strength. Multiple magnetic elements 452 are spaced apart on the back plate 500 along a first direction (such as the left-right direction). Each magnetic element 452 is strip-shaped. The multiple magnetic elements 452 form a plurality of placement gaps. The magnetic properties of two adjacent magnetic elements 452 are opposite and form a closed magnetic circuit. At least one edge of the conductive coil passes through the plurality of placement gaps in sequence to surround the multiple magnetic elements 452.

[0084] Combination Figure 3 The document describes the winding method of a conductive coil, wherein a plurality of magnetic elements 452 include a first magnetic element 452, a second magnetic element 452, a third magnetic element 452, a fourth magnetic element 452, and a fifth magnetic element 452 arranged sequentially along a first direction. A first installation gap exists between the first magnetic element 452 and the second magnetic element 452; a second installation gap exists between the second magnetic element 452 and the third magnetic element 452; a third installation gap exists between the third magnetic element 452 and the fourth magnetic element 452; and a fourth installation gap exists between the fourth magnetic element 452 and the fifth magnetic element 452. The conductive coil extends away from the first magnetic element 452 from the second magnetic element. The coil begins winding from one side of the first magnetic element 452 and the upper end of the first magnetic element 452, extending downwards to the lower end of the first magnetic element 452, then turning into the first mounting gap and extending upwards. It then turns from the upper end of the second magnetic element 452 into the second mounting gap and extends downwards, and from the lower end of the third magnetic element 452 into the third mounting gap and extends upwards. This continues through the fourth mounting gap, reaching the lower end of the fifth magnetic element 452. Then, from the side of the fifth magnetic element 452 opposite to the fourth magnetic element 452, it extends upwards to the upper end of the fifth magnetic element 452, and then extends approximately along the first direction to the starting position, beginning the second turn of winding, until the conductive coil has the target number of turns. In this way, the length of the conductive coil in the magnetic field can be maximized, covering a sufficient area of ​​the lamp plate 210, thereby providing sufficient driving force for the lamp plate 210 to achieve vibration. Of course, this application does not limit the winding method of the conductive coil.

[0085] In addition, see reference Figure 3 To further increase the length of the conductive coil, the magnetic components 452 can be divided into multiple groups, which are spaced apart along a first direction. Each group can include several magnetic components 452 spaced apart along a second direction, with the first and second directions perpendicular to each other. In this way, the magnetic poles of the magnetic components 452 in each group are arranged in the same direction, ensuring that the force exerted by the magnetic components 452 on the coil on the same side of each group is in the same direction. This maximizes the vibrational energy provided by the exciter 400 to the lamp panel 210, ensuring optimal sound production.

[0086] In some embodiments, multiple magnetic elements 452 may be arranged circumferentially around a reference circle, with the length direction of each magnetic element 452 parallel to the radial direction of the reference circle corresponding to its location. The reference circle may refer to the circumference of the same position of the multiple magnetic elements 452, such as the inner radial end, outer radial end, or any other arbitrary position. In this case, there is a placement gap between any two adjacent magnetic elements 452, and the conductive coil passes through all the placement gaps in sequence to form a surround around the multiple magnetic elements 452. Thus, by adjusting the radius of the reference circle and adjusting the position of the magnetic elements 452 accordingly, the coverage area of ​​the exciter 400 can be adjusted, and the exciter 400 can uniformly transmit vibration energy in all directions, which is beneficial for better promoting the vibration and sound generation of the display panel 100.

[0087] In some embodiments, combined with Figure 1 and Figure 5 The magnetic component 450 may also include a magnetic guide 451, which may be a magnetic plate. The magnetic guide 451 is connected to the back plate 500. The magnetic component 452 is fixedly disposed on the magnetic guide 451. The magnetic guide 451 helps to ensure that adjacent magnetic components 452 form a closed magnetic circuit. Furthermore, the magnetic guide 451 can provide mounting support for the magnetic component 452.

[0088] It is understandable that the conductive coil will generate a certain amount of heat during prolonged operation. To improve the overall safety of the device, heat dissipation holes can be formed on the magnetic conductive component 451. The heat dissipation holes can be any shape, such as square, elliptical, or trapezoidal. The number and size of the heat dissipation holes can also be adjusted according to the actual situation, and this embodiment does not impose any restrictions on this. The heat dissipation holes can dissipate the heat generated by the conductive coil into the air, preventing the conductive coil from overheating and helping to ensure the image quality of the display device 10.

[0089] Considering that the magnetic component 452 may shift position during the generation of a magnetic field, to prevent the magnetic component 452 from being fixed in position and to ensure the normal operation of the exciter 400, in some optional embodiments, the magnetic component 450 may also include a positioning plate (not shown). Specifically, the positioning plate is disposed on the side of the magnetic conductor 451 where the magnetic component 452 is located. Positioning holes are formed on the positioning plate, extending through opposite sides of the positioning plate. The magnetic component 452 is engaged within the positioning holes, with one side of the magnetic component 452 abutting against the sidewall of the magnetic conductor 451. It is understood that by adding a positioning plate, the position of the magnetic component 452 is better fixed, further improving the overall stability.

[0090] In some embodiments, the positioning plate and the magnetic conductive element 451 can be connected by a detachable connection or a fixed connection. For example, bolts, clips, or hanging connections can be used. Specifically, this application does not impose excessive limitations on the embodiments. It should be noted that the positioning plate can be made of a non-magnetic material and is fixed to the magnetic conductive element 451. This serves to limit the magnetic element 452, maintaining the accurate relative position of the magnetic element 452 and ensuring the reliability of its long-term vibration and stress state.

[0091] In some embodiments, reference Figure 1 An opening 503 may be provided on the back plate 500, and a magnetic conductive element 451 may be disposed at the opening 503. The magnetic conductive element 451 may cover the opening 503 and may be fixedly connected to the back plate 500, such as by bolts or snap-fit. Thus, placing the magnetic conductive element 451 at the opening of the back plate 500 facilitates heat dissipation for the magnetic conductive element 451, and the connection method between the magnetic conductive element 451 and the back plate 500 is relatively simple and easy to implement.

[0092] In some embodiments, reference Figure 2 The magnetic component 451 can be integrally formed with the back plate 500, that is, the magnetic component 452 can be directly set on the back plate 500. In this way, the overall structure of the display device 10 can be further simplified and the cost can be reduced.

[0093] In some embodiments, reference Figure 6 The light panel 210 may include a base layer 231;

[0094] In some embodiments, reference Figure 6 The light panel 210 may include a first circuit layer 232;

[0095] In some embodiments, reference Figure 6 The lamp board 210 may include a second circuit layer 233.

[0096] The base layer 231 can be a non-metallic layer, for example, it can be a plastic component, or it can be made of other materials. The base layer 231 has a first side and a second side, the first side facing the display panel 100 and the second side facing away from the display panel 100. A first circuit layer 232 is disposed on the first side, and an array of light sources 240 are provided on the first circuit layer 232. The light sources 240 are used to project light onto the display panel 100. The coil assembly 410 can form a second circuit layer 233, which is disposed on the second side.

[0097] In some embodiments, the base layer 231, the first circuit layer 232, and the second circuit layer 233 can be an integral structure. The base layer 231, the first circuit layer 232, and the second circuit layer 233 together constitute the board body 230 mentioned above. In this case, the board body 230 is a double-sided copper-clad circuit board. The first circuit layer 232 and the second circuit layer 233 are both copper foil circuits printed on the substrate. In other words, in this embodiment, the coil assembly 410 is formed by etching or printing processes on the metal layer of the second side of the double-sided copper-clad circuit board. The coil assembly 410 is not fixed to the lamp board 210 by other intermediate connectors. The coil assembly 410 is both a part of the lamp board 210 and a part of the exciter 400. In this way, integrating the lamp board 210 and the coil assembly of the exciter 400 into one unit is beneficial to reducing the overall thickness of the backlight assembly 200 and the exciter 400, thereby contributing to the thinner and lighter design of the display device 10. The light source is an LED light source, which is arranged in an array on the first circuit layer 232. In addition, a transparent encapsulation can be provided on the outside of the light source to better protect the light source and prevent it from being squeezed or worn by other structures when the lamp board 210 vibrates.

[0098] It should be noted that the conductive coil acts as a purely resistive load, which can effectively improve the high-frequency response of the electromagnetic excitation unit, thereby expanding the frequency bandwidth of the exciter 400.

[0099] The substrate can be composed of conductive foil circuit boards or films. The conductive foil includes, but is not limited to, metals, copper, silver-plated copper, silver paste, carbon, indium tin oxide (ITO), etc.

[0100] In some embodiments, reference Figure 7 The lamp panels 210 are arranged in an array, and the exciter 400 is disposed on at least a portion of the lamp panels 210. That is, only the lamp panels 210 with the exciter 400 can vibrate, while the remaining lamp panels 210 can be fixedly disposed. For example, the lamp panels 210 without the exciter 400 can be directly fixed to the back plate 500. The lamp panels 210 without the exciter 400 can be non-double-sided copper-clad substrates. The exciter 400 is adapted to drive any one of the at least a portion of the lamp panels 210 to vibrate independently, or the exciter 400 is configured to drive at least a portion of the lamp panels 210 to vibrate synchronously. In other words, the multiple lamp panels 210 with the exciter 400 can vibrate independently or synchronously, which allows the display device 10 to output different sound effects, thereby enhancing the user experience.

[0101] In addition, in some embodiments, the lamp board 210 with exciter 400 can drive the lamp board 210 without exciter 400 to vibrate synchronously, so as to realize that all lamp boards 210 vibrate synchronously, thereby driving the display panel 100 to vibrate, and thus the display panel 100 can vibrate to produce sound.

[0102] In addition, see reference Figure 8 Considering that the manufacturing process and cost of the lamp board 210 with and without conductive coils are the same, in this embodiment, all the lamp boards 210 arranged in an array can be lamp boards 210 equipped with coil assemblies 410. Based on this, to achieve vibration only in a portion of the multiple lamp boards 210, the number of magnetic components 450 can be less than the number of coil assemblies 410. The magnetic components 450, together with the coil assemblies 410 on only a portion of the lamp boards 210, form the exciter 400. Thus, without increasing structural complexity, the display device 10 can still output different sound effects to enhance the user experience.

[0103] Of course, when multiple lamp panels 210 all use lamp panels 210 with conductive coils, each lamp panel 210 can be equipped with a corresponding magnetic component 450, for example... Figure 9 As shown, the light panel 210 is divided into five groups arranged side by side along the first direction. The five groups correspond to five regions, namely the left, left-center, center, right-center, and right regions. In this embodiment, the audio output signal can be processed by an algorithm. Based on the volume and phase parameters of the left, center, and right channels of the audio signal, five output signals are calculated: left, left-center, center, right-center, and right. The five output signals correspond to the conductive coils of the five regions of the display device 10. In this way, the sound can follow the picture, making the sound effects richer and further improving the user's audiovisual experience.

[0104] In some embodiments, considering that the sound effect of the display device 10 is relatively simple when it only vibrates the display panel 100 to produce sound, in order to enrich the sound effect of the display device 10, the display device 10 may also be provided with a speaker (not shown in the figure). The speaker includes a tweeter, a woofer and a midrange speaker. The number and arrangement of the tweeter, woofer and midrange speaker can be reasonably set according to actual needs. In this way, by combining the vibration sound production of the central area of ​​the display panel 100 with the speaker (including the tweeter, woofer and midrange speaker), the sound effect of the display device 10 can be further improved, thereby improving the user experience.

[0105] In some embodiments, combined with Figure 1 and Figure 2The display device 10 may further include a buffer connector 211. The buffer connector 211 is disposed between the lamp panel 210 and the back plate 500. The lamp panel 210 is connected to the back plate 500 via the buffer connector 211. For example, the buffer connector 211 may be disposed at the four corners of the lamp panel 210 or at the four edges of the lamp panel 210. Since the vibration mode of the lamp panel 210 is planar displacement vibration, the buffer connector 211 provides elastic buffering and fixation for the vibration of the lamp panel 210. When the lamp panel 210 vibrates, the buffer connector 211 can be compressed or stretched, thereby supporting the backlight sound-emitting element to perform piston-like vibration under the action of driving force.

[0106] In some embodiments, the buffer connector 211 is a double-sided foam tape, which results in a simple structure and low cost. However, this application does not limit this, and the buffer connector 211 can also have other structures.

[0107] In some embodiments, the buffer connector 211 is disposed at the splicing position of two adjacent light panels 210. In this way, the two light panels 210 can be fixed at the same time using the same buffer connector 211, so as to save materials. In addition, the splicing gap of the two light panels 210 can be sealed to prevent air leakage.

[0108] In some embodiments, combined with Figure 1 and Figure 2 The display device 10 may also include a middle frame 600;

[0109] In some embodiments, combined with Figure 1 and Figure 2 The display device 10 may also include a first seal 611;

[0110] In some embodiments, combined with Figure 1 and Figure 2 The display device 10 may also include a second seal 612.

[0111] Specifically, a middle frame 600 is disposed around the display panel 100 and the back plate 500. The middle frame 600 can be connected to both the display panel 100 and the back plate 500. A first sealing member 611 is disposed around the display panel 100 to seal the gap between the display panel 100 and the middle frame 600. A second sealing member 612 is disposed around the lamp panel 210 to seal the gap between the lamp panel 210 and the back plate 500. For example, the second sealing member 612 can be disposed around the periphery of a combined structure formed by multiple lamp panels 210. In this way, the overall sealing performance of the display device 10 can be ensured. In some embodiments, both the first sealing member 611 and the second sealing member 612 can be double-sided adhesive.

[0112] In related technologies, compared with display devices that use OLED light sources, OLED displays are self-emissive screens and possess a certain degree of flexibility. Therefore, by placing an exciter on the back of the OLED display, the OLED display can be elastically deformed and produce sound under the excitation vibration of the exciter. However, in the liquid crystal display device 10 of this application, the liquid crystal display device has a backlight assembly 200, making it impossible to directly place an exciter on the back of the display panel 100. Furthermore, the lamp board in the backlight assembly 200 has high rigidity, making it difficult to couple and transmit its own vibration to the display panel 100, resulting in low vibration force transmission efficiency.

[0113] Therefore, a support and transmission component can be provided within the cavity M between the display panel 100 and the lamp board 210 of the Mini-LED display device 10 or other liquid crystal display device 10. This support and transmission component can include multiple support members 300, which serve as a vibration transmission medium to transmit the vibration of the lamp board 210 to the display panel 100, thereby improving the transmission efficiency of vibration from the lamp board 210 to the display panel 100. Furthermore, the support members 300 can maintain the gap between the cavity M between the lamp board 210 and the display panel 100 within a preset range, preventing the light source 240 and the display panel 100 from colliding at a certain location, thus avoiding the risk of collision noise and abrasion.

[0114] For example, refer to Figure 10 The support transmission component includes multiple support members 300, which are supported between the lamp panel 210 and the display panel 100 and are arranged at intervals along the lamp panel 210. One end of each support member 300 is connected to the lamp panel 210, and the other end is connected to the display panel 100. In this way, the gap of the gas layer M between the lamp panel body 230 and the display panel 100 can be maintained within a preset range, avoiding the situation where the light source 240 and the display panel 100 touch each other at a certain position and generate collision noise.

[0115] In addition, the support member 300 can also serve as a vibration transmission medium, transmitting the vibration of the lamp board 210 to the display panel 100, thereby improving the transmission efficiency of vibration from the lamp board 210 to the display panel 100.

[0116] Furthermore, since the optical film assembly 110 converts and homogenizes the light generated by the light source of the lamp panel 210, even if the support member 300 is provided on the light-emitting side of the lamp panel 210, no shadow will be generated on the display panel 100, resulting in uneven brightness of the display panel 100. Thus, there are no restrictions on the shape and size of the support member 300, or the contact area between the support member 300 and the diffusion film 113. The cross-sectional shape of the support member 300 (perpendicular to the display device) can be rectangular, cylindrical, conical, trapezoidal, dumbbell-shaped, or other shapes.

[0117] It is understandable that the material of the support component 300 can be silicone, which is easy to guide light. Silicone has low hardness, meaning that the support component 300 is either a silicone component or a rubber component.

[0118] Additionally, it should be noted that the internal temperature of the display device 10 changes during operation, and materials such as silicone and rubber age with these temperature changes, leading to a reduction in the cushioning effect, weakened support strength, and decreased vibration transmission efficiency of the support member 300. In some embodiments, the support member 300 may also be a composite structure.

[0119] In some embodiments, the two ends of the support member 300 can be connected by negative pressure adsorption. For example, the two ends of the support member 300 can be provided with suction cup structures, and the two ends of the support member 300 are fixedly connected to the lamp board 210 and the display panel 100 respectively through the suction cup structures. The process is simple to implement.

[0120] In some embodiments, one end of the support member 300 is connected via a first adhesive structure 310, and the other end of the support member 300 is connected via a suction cup structure. For example, one end of the support member 300 is connected to the lamp panel 210 via the first adhesive structure 310, and the other end of the support member 300 is fixedly connected to the display panel 100 via a suction cup structure. Thus, the support member 300 can be fixed by double-sided adhesive or by mechanical fixation, thereby achieving vibration linkage between the lamp panel 210 and the display panel 100 and improving vibration transmission efficiency. However, double-sided adhesive or mechanical fixation has the disadvantage of complex manufacturing processes; the suction cup adsorption solution improves the feasibility of the solution.

[0121] In some embodiments, the support member 300 can be a silicone material with a set transparency. Multiple bubble structures or light-guiding particles, such as silicon dioxide particles, can be provided in the support member 300. Along a direction parallel to, for example, the plane where the silicon dioxide particles are located, the distribution density of the bubble structures or light-guiding particles, such as silicon dioxide particles, gradually decreases along the direction away from the longitudinal central axis of the support member 300. By utilizing the bubble structures or light-guiding particles with the above distribution pattern in conjunction with the shape of the support member 300, the support member 300 can have a uniform light-emitting effect on the light emitted by the light source, which can make the uneven light intensity of the light source uniformly distributed, which is beneficial to optimizing the display effect of the display device.

[0122] In some embodiments, the surface of the support member 300 is covered with a reflective film layer or coated with a reflective material. In some embodiments, the support member 300 also has a light control effect. In local dimming display mode, the surface of the support member 300 is covered with a reflective film layer or coated with a reflective material, so that the light emitted from different light control areas is reflected on the surface of the support member 300 in other control areas. The support member 300 reduces the mutual influence of light between different light control areas, thereby avoiding light interference between different local dimming display areas.

[0123] In some embodiments of this application, reference is made to Figure 1 and Figure 2 The backlight assembly 200 also includes an optical film assembly 110, with the display panel 100 located on the light-emitting side of the optical film assembly 110 and the lamp panel 210 located on the light-incident side of the optical film assembly 110. That is, the display panel 100, the optical film assembly 110, and the lamp panel 210 are stacked along the thickness direction of the display device 10.

[0124] Depending on the type of light emitted by the light source 240, the optical film assembly 110 can be of different types. For example, when the light source 240 emits white light, the optical film assembly 110 may include a reflective sheet, a light guide plate, a brightness enhancement film, etc. The reflective sheet is attached to the side of the plate body 230 where the light source 240 is located.

[0125] When the light source 240 emits blue light, the optical film assembly 110 may include a diffusion film, a fluorescent film, and a brightness enhancement film. The diffusion film is disposed in front of the light source 240, allowing the user to uniformly mix the light from multiple light sources 240, i.e., converting a point light source 240 into a surface light source 240. The fluorescent film converts the light emitted by the light source 240 into white light, thus not limiting the color of the light emitted by the light source 240; the light source 240 can emit blue or purple light. The brightness enhancement film is used to increase the brightness of the light. It is understood that when the light source 240 emits white light, the optical film assembly 110 may also include a diffusion film, a fluorescent film, and a brightness enhancement film. This embodiment uses an optical film assembly 110 including a diffusion film, a fluorescent film, and a brightness enhancement film as an example for explanation.

[0126] In some embodiments, the display panel 100 (i.e., the liquid crystal screen described above) and the optical film assembly 110 can be pressed together to avoid air gaps between each pair of the display panel 100, the brightness enhancement film, the fluorescence film, and the diffusion film that allow air to flow through them.

[0127] In some embodiments, the liquid crystal screen and the optical film assembly 110 can also be bonded together in pairs, for example, by photosensitive adhesive (UV adhesive), foam, double-sided tape, etc. That is, the display panel 100 and the optical film assembly 110 can be bonded together as a whole, and in this case, the cavity M is formed between the optical film assembly 110 and the panel body 230.

[0128] In some embodiments, the display device 10 further includes a rear cover (not shown), which is located on the side of the back plate 500 opposite to the display panel 100, i.e., the rear cover is disposed on the rear side of the back plate 500. The controller, electrical connection wires, etc. of the display device 10 can be disposed between the back plate 500 and the rear cover to simplify the appearance of the display device 10. The material of the rear cover can be plastic, metal, etc.

[0129] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0130] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display device, characterized in that, include: The display panel is configured to display image information; A backlight assembly, the backlight assembly including a lamp panel configured to provide backlight to the display panel, a cavity being formed between the lamp panel and the display panel; A back panel, at least a portion of which is disposed on the side of the lamp panel opposite to the display panel; An exciter, the exciter comprising: A coil assembly, which is planar and is disposed on the side of the lamp panel opposite to the display panel; A magnetic component is disposed on the back plate and faces the coil component. The coil component and the magnetic component are configured to drive the lamp plate to vibrate through their own electromagnetic induction, thereby causing the display panel to vibrate and produce sound.

2. The display device according to claim 1, characterized in that, The coil assembly includes a conductive coil disposed on the lamp panel. The magnetic component includes a magnetic element, and the conductive coil surrounds the magnetic element.

3. The display device according to claim 2, characterized in that, The magnetic components are multiple, and are spaced apart along a first direction on the back plate, forming several placement gaps. Any two adjacent magnetic components have opposite magnetic properties and form a closed magnetic circuit. At least one edge of the conductive coil passes sequentially through a plurality of the mounting gaps to surround a plurality of the magnetic elements.

4. The display device according to claim 3, characterized in that, The magnetic component further includes a magnetic conductive element, which is connected to the back plate and is fixedly disposed on the magnetic conductive element.

5. The display device according to any one of claims 1-4, characterized in that, The light panel includes: The base layer has a first side facing the display panel and a second side facing away from the display panel; A first circuit layer is disposed on the first side, and an array of light sources are provided on the first circuit layer for projecting light onto the display panel. The coil assembly constitutes a second circuit layer, which is disposed on the second side.

6. The display device according to any one of claims 1-4, characterized in that, The lamp panels are arranged in an array of multiple lamp panels, and the exciter is disposed on at least a portion of the multiple lamp panels. The exciter is adapted to drive any one of the at least some of the lamp panels to vibrate independently, or the exciter is adapted to drive the at least some of the lamp panels to vibrate synchronously.

7. The display device according to claim 5, characterized in that, The lamp panels are arranged in an array of multiple lamp panels, and each of the multiple lamp panels is equipped with the coil assembly. The number of magnetic components is less than the number of coil components, and the magnetic components together with some of the coil components on the lamp board constitute the exciter.

8. The display device according to claim 6, characterized in that, Also includes: A buffer connector is disposed between the lamp panel and the back plate, and the lamp panel is connected to the back plate through the buffer connector.

9. The display device according to claim 8, characterized in that, The buffer connector is a double-sided foam tape, and / or the buffer connector is located at the splicing position of two adjacent light panels.

10. The display device according to any one of claims 1-4, characterized in that, Also includes: A mid-frame is disposed around the display panel and the back panel; A first sealing element is disposed on the periphery of the display panel to seal the gap between the display panel and the middle frame; A second sealing element is disposed on the periphery of the lamp panel to seal the gap between the lamp panel and the back panel.

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