Display device

Abstract

The embodiment of the utility model relates to the display technology, in particular to display equipment. The display device comprises the display panel, the backlight assembly and the exciter, the exciter drives the display panel to vibrate and produce sound through the cavity between the backlight assembly and the display panel, the acoustic effect is good, and sound and picture integration is easy to achieve. The actuator of the exciter easily generates a large amount of heat due to reciprocating vibration, the damper is arranged to transfer the heat generated by vibration of the exciter to the side deviating from the vibration output end of the exciter, and a gap is formed between the damper and the backlight assembly; the heat generated by vibration of the exciter can be dissipated through air and also can be dissipated through the damper, so that the temperature of the actuating piece is reduced, the influence of local temperature on the image display quality is reduced, and the image display quality of the display equipment is improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to display technology, and in particular, to a display device. BACKGROUND

[0002] The size of a loudspeaker in a display device, such as a television, is generally small due to the limitation of the appearance of a thin design and the installation position, and is forced to adopt a downward sound or a rear sound, etc. The sound image position is separated from the image position, and the viewing experience is not good, and the audio-visual experience of sound and picture integration cannot be provided.

[0003] In the related art, a sound emitting exciter is arranged on the display device to vibrate the display panel to realize screen sound emission, that is, the display panel has display and sound emission functions, and realizes the audio-visual effect of sound and picture integration.

[0004] However, the heat dissipation performance of the sound emitting exciter is poor, and the heat is transferred to the display panel, so that the local temperature of the display panel is increased, and the local display brightness and color of the image are deviated. CONTENT OF THE UTILITY MODEL

[0005] Some embodiments of the present application provide a display device, which can realize display screen vibration sound emission, and the actuator of the exciter generating vibration can be cooled by a spring wave.

[0006] Some embodiments of the present application provide a display device, which includes:

[0007] a display panel configured to display image information;

[0008] a backlight assembly configured to provide backlight to the display panel; a cavity is formed between the backlight assembly and the display panel;

[0009] an exciter arranged on a side of the backlight assembly away from the display panel, the exciter being configured to drive the backlight assembly to vibrate; the exciter includes:

[0010] a spring wave, the spring wave having a spacing with the backlight assembly, and the spring wave being configured to transfer heat generated by vibration of the exciter to a side away from a vibration output end of the exciter.

[0011] The display device of some embodiments of the present application sets up a display panel to display image information; sets up a backlight assembly to provide backlight for the display panel; sets up an exciter to provide vibration for the display panel to make sound, the exciter being arranged on the side of the backlight assembly away from the display panel, so that the arrangement of the exciter does not affect the display function of the display panel; the exciter drives the display panel to vibrate and make sound through the gas in the cavity between the backlight assembly and the display panel, the acoustic effect is good, and the sound and picture are easily integrated. In addition, the actuator of the exciter is easy to generate a large amount of heat due to reciprocating vibration, the heat generated by the vibration of the exciter is transmitted to the side away from the vibration output end of the exciter through the elastic wave, and the elastic wave has a gap with the backlight assembly; in addition to heat dissipation through air, the heat generated by the vibration of the exciter can also be dissipated through the elastic wave, which is conducive to reducing the temperature of the actuator, reducing the influence of local temperature on image display quality, and improving the image display quality of the display device.

[0012] In some embodiments of the present application, the exciter further comprises:

[0013] The exciter body,

[0014] The actuator is connected with the backlight assembly,

[0015] The two ends of the elastic wave are respectively connected with the exciter body and the actuator, and the elastic wave is used to transmit the heat of the actuator to the exciter body.

[0016] The elastic wave of the present application connects the exciter body and the actuator, and transmits the heat generated by the vibration of the actuator to the exciter body for heat dissipation, so that the heat generated by the actuator can be dissipated through the elastic wave in addition to heat dissipation through air, which is conducive to reducing the temperature of the actuator, reducing the influence of local temperature on image display quality, and improving the image display quality of the display device.

[0017] In some embodiments of the present application, the elastic wave has a heat conduction layer, and the heat conduction layer is in contact with the exciter body.

[0018] The elastic wave of the present application has a heat conduction layer, which is conducive to heat transfer, so that the heat generated by the actuator is transmitted to the exciter body for heat dissipation, reducing the influence of the heat of the actuator on image display quality; the heat conduction layer is in contact with the exciter body, so as to improve the heat transfer efficiency and further improve the heat dissipation efficiency of the actuator.

[0019] In some embodiments of the present application, the elastic wave further comprises a fiber layer, the heat conduction layer and the fiber layer are stacked and formed as an integral part.

[0020] The elastic wave of the embodiment of the present application uses a fiber layer as a framework and is formed by the fiber layer and a heat-conducting layer in combination, and has not only elasticity but also high heat-conducting performance, which is beneficial to transferring the heat generated by the actuating member to the exciter body and reducing the heat generated by the actuating member transferred to the display panel.

[0021] In some embodiments of the present application, one of the fiber layer and the heat-conducting layer is a plurality of, and the fiber layer and the heat-conducting layer are adjacent.

[0022] The elastic wave of the embodiment of the present application improves the structural strength of the elastic wave and the heat-conducting performance of the elastic wave by arranging the fiber layer and the heat-conducting layer in an alternating and laminated manner.

[0023] In some embodiments of the present application, the heat-conducting layer is a heat-conducting film, and a plurality of through holes are arranged on the heat-conducting film.

[0024] The elastic wave of the embodiment of the present application improves the heat dissipation efficiency of the heat-conducting film by arranging the fiber layer as a framework, arranging the heat-conducting film and arranging a plurality of through holes on the heat-conducting film, and the heat-conducting film can also have a certain flexibility.

[0025] In some embodiments of the present application, the exciter further comprises a compression ring configured to compress the elastic wave on the exciter body.

[0026] The elastic wave of the embodiment of the present application is compressed on the exciter body by the compression ring, which is beneficial to improving the stability and tightness of the connection between the elastic wave and the exciter body and facilitating the heat transfer.

[0027] In some embodiments of the present application, the exciter body comprises a magnetic assembly, the magnetic assembly comprises a magnetic conducting member and a magnetic member, a magnetic air gap is formed between the magnetic conducting member and the magnetic member, one end of the actuating member away from the vibration output end is located in the magnetic air gap, and one end of the elastic wave is connected with the magnetic conducting member.

[0028] The exciter of the embodiment of the present application connects the elastic wave with the magnetic conducting member, reduces the width size of the exciter, and since the axial size of the actuating member is large, the laminated compression of the compression ring, the magnetic conducting member and the shell does not affect the overall thickness of the exciter. The connection mode of the elastic wave is not only beneficial to ensuring the stability of the connection, but also beneficial to making the exciter compact in structure.

[0029] In some embodiments of the present application, the part of the magnetic conducting member in contact with the elastic wave is provided with a ventilation hole.

[0030] The embodiment of the present application improves the heat dissipation efficiency of the magnetic conducting member by arranging the ventilation hole on the magnetic conducting member, and improves the heat dissipation amount of the actuating member through the elastic wave.

[0031] In some embodiments of the present application, the elastic wave includes a body part, a first connecting part and a second connecting part arranged at two ends of the body part, the first connecting part is connected with the actuating member, and the second connecting part is connected with the exciter body.

[0032] The elastic wave of the embodiments of the present application increases the connecting area with the actuating member by arranging the first connecting part and increases the connecting area with the exciter body by arranging the second connecting part, which not only improves the stability of the connection but also improves the heat dissipation effect.

[0033] In some embodiments of the present application, the display device further includes a back shell located on the side of the backlight assembly away from the display panel; the exciter is located between the back shell and the backlight assembly, and the actuating member of the exciter is further connected with the back shell to drive the back shell to vibrate and make sound.

[0034] The embodiments of the present application shield and protect the exciter and the backlight assembly from the back side of the display device by arranging the back shell, and the actuating member of the exciter is connected with the back shell to drive the back shell to vibrate and make sound, so that the display device can make sound from the front side and the back side at the same time, and the sound intensity of the display device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the drawings needed to be used in the embodiments or related art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0036] Figure 1 A schematic diagram of an operation scene between a display device and a control device according to some embodiments of the present application;

[0037] Figure 2 A configuration block diagram of a display device according to some embodiments of the present application;

[0038] Figure 3 A cross-sectional schematic diagram of a display device according to some embodiments of the present application;

[0039] Figure 4 A cross-sectional schematic diagram of another display device according to some embodiments of the present application;

[0040] Figure 5 A cross-sectional schematic diagram of another display device according to some embodiments of the present application;

[0041] Figure 6 An arrangement schematic diagram of a connecting member and an exciter according to some embodiments of the present application;

[0042] Figure 7A cross-sectional view of an actuator for some embodiments of the present application;

[0043] Figure 8 A cross-sectional view of a damper for some embodiments of the present application;

[0044] Figure 9 A structural view of a damper for some embodiments of the present application;

[0045] Figure 10 A structural view of another damper for some embodiments of the present application;

[0046] Figure 11 A cross-sectional view of another damper for some embodiments of the present application;

[0047] Figure 12 A structural view of another damper for some embodiments of the present application;

[0048] Figure 13 A structural view of another damper for some embodiments of the present application;

[0049] Figure 14 A cross-sectional view of another display device for some embodiments of the present application;

[0050] Figure 15 A cross-sectional view of another display device for some embodiments of the present application;

[0051] Figure 16 A structural view of an actuator for some embodiments of the present application;

[0052] Figure 17 A cross-sectional view of another display device for some embodiments of the present application;

[0053] Figure 18 A structural view of a support and a connecting piece for some embodiments of the present application;

[0054] Figure 19 A cross-sectional view of a display device for some embodiments of the present application.

[0055] Explanation of reference numerals:

[0056] 10: display device; 20: smart device; 30: server;

[0057] 100: display panel; 110: optical film assembly; 111: brightness enhancement film; 112: fluorescent film; 113: diffusion film; 120: display film layer;

[0058] 200: backlight assembly; 210: lamp plate; 211: connecting piece; 212: sound emitting plate; 230: plate body; 240: light source; 250: second adhesive piece;

[0059] 300: support;

[0060] 400: exciter; 401: exciter body; 410: actuator; 411: connecting structure; 420: elastic wave; 4201: body part; 4202: first connecting part; 4203: second connecting part; 421: fiber layer; 422: heat conducting layer; 423: heat conducting film; 4231: through hole; 430: shell; 440: compression ring; 450: magnetic assembly; 451: magnetic conducting part; 452: magnetic part; 460: elastic pad; 470: damping block; 480: fixing pin; 490: vibration transmission structure; 491: viscous buffer structure;

[0061] 500: back plate; 501: back plate body; 502: first side plate; 503: opening; 504: convex; 505: first adhesive;

[0062] 700: rear shell;

[0063] 900: control device; 901: tuning 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;

[0064] M: cavity; N: magnetic air gap. DETAILED DESCRIPTION

[0065] In order to make the purpose, implementation and advantages of the present application more clear, the following will combine the drawings in the exemplary embodiments of the present application to make a clear and complete description of the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only a part of the embodiments of the present application, but not all the embodiments.

[0066] It should be noted that the brief description of the terms in the present application is only for the convenience of understanding the following described embodiments, but is not intended to limit the embodiments of the present application. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0067] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or devices.

[0068] In the description of the present application, it needs to be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0069] The terms "first", "second" are only configured for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0070] In the description of the present application, it needs to be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0071] For a conventional display device, for example, a television, a loudspeaker is installed to output sound. The loudspeaker is usually installed on the bottom side or back side of the display device, resulting in the separation of the sound image position and the image position, which is not good for the visual experience, and cannot provide an audio-visual experience of sound and picture integration. In the related art, an exciter is provided on the display device, and the display panel can be excited to realize screen sound, so that the display panel has the functions of display and sound, and realizes the audio-visual effect of sound and picture integration.

[0072] The exciter of the display device has poor heat dissipation performance, and the vibration output end of the exciter becomes the only heat transfer path. Since the vibration output end of the exciter is in contact with the display panel, heat is transferred to the display panel, which causes the local temperature of the display panel to rise, resulting in the deviation of the local display brightness and color of the image.

[0073] In some exciters, a liquid is filled between the voice coil and the magnetic attraction structure of the exciter to increase the heat dissipation technology, but it is only applicable to high-frequency loudspeakers with small amplitude, and too high temperature will cause the magnetic liquid to evaporate and splash, and the heat dissipation effect is limited.

[0074] Therefore, some embodiments of the present application provide a display device, an actuator of which comprises an actuating member, a spring wave and an actuator body, the spring wave is connected with the actuating member and the actuator body respectively, the spring wave transmits heat of the actuating member to the actuator body for heat dissipation, so as to reduce the temperature of the actuating member and reduce the influence of local temperature on image display quality.

[0075] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0076] The display device provided by the embodiments of the present application can have various implementation forms, for example, can be a television, a smart television, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 And Figure 2 is a specific implementation of the display device of the present application.

[0077] Figure 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 application. As shown in Figure 1 , a user can operate the display device 10 through the smart device 20 or the control device 900. In some embodiments, the display device 10 also communicates data with the server 30. The display device 10 can be allowed to be connected in communication through a local area network (LAN), a wireless local area network (WLAN) and other networks. The server 30 can provide various contents and interactions to the display device 10. The server 30 can be a cluster or multiple clusters, and can include one or more types of servers.

[0078] Figure 2 is a structural schematic diagram of the display device in an example, as Figure 2 In some embodiments, the display device 10 comprises a tuning demodulator 901; the tuning demodulator 901 receives broadcast television signals through wired or wireless receiving mode, and demodulates audio and video signals and EPG data signals from multiple wireless or wired broadcast television signals.

[0079] In some embodiments, the display device 10 comprises a communicator 902; the communicator 902 is a component configured to communicate with external devices or servers according to various communication protocol types. For example: the communicator 902 can comprise at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, and other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 10 can establish the sending and receiving of control signals and data signals with the control apparatus 900 or the server 30 through the communicator 902.

[0080] In some embodiments, the display device 10 comprises a detector 903; the detector 903 is configured to collect signals of external environment or external interaction. For example, the detector 903 comprises a light receiver configured to collect ambient light intensity; or the detector 903 comprises an image collector such as a camera, which can be configured to collect external environment scenes, user attributes or user interaction gestures; or the detector 903 comprises a sound collector such as a microphone, which is configured to receive external sound.

[0081] In some embodiments, the display device 10 comprises an external device interface 904; the external device interface 904 can comprise but is not limited to any one or more of the following: a high-definition multimedia interface (HDMI), an analog or data high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, etc. It can also be a composite input / output interface formed by the above multiple interfaces.

[0082] In some embodiments, the display device 10 comprises a controller 905;

[0083] In some embodiments, the display device 10 comprises a display 906; the display 906 comprises a display screen component configured to present a picture, and a driving component for driving image display, which is configured to receive image signals originating from controller output, and components for displaying video content, image content, and menu control interface, as well as user control UI interface. The display 906 can be a liquid crystal display, an OLED display, and a projection display, and can also be a projection device and a projection screen.

[0084] In some embodiments, the display device 10 comprises an audio output interface 907;

[0085] In some embodiments, the display device 10 comprises a memory 908;

[0086] In some embodiments, the display device 10 comprises a power supply 909;

[0087] In some embodiments, the display apparatus 10 includes at least one of a user interface 910. The user interface 910 can be configured to receive a control signal of a control device 900 (e.g., an infrared remote controller, etc.).

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

[0089] In some embodiments, the controller includes a video processor;

[0090] In some embodiments, the controller includes an audio processor;

[0091] In some embodiments, the controller includes a graphics processor;

[0092] In some embodiments, the controller includes a RAM;

[0093] In some embodiments, the controller includes a ROM;

[0094] In some embodiments, the controller includes a first interface to an n-th interface configured to input / output signals.

[0095] In some embodiments, the controller 905 and the tuner and demodulator 901 can be located in different separate devices, i.e., the tuner and demodulator 901 can also be located in an external device of the main body device where the controller 905 is located, such as an external set-top box, etc.

[0096] The controller 905 controls the operation of the display apparatus and responses to the user's operation by storing various software control programs in the memory. The controller 905 controls the overall operation of the display apparatus 10. For example, in response to receiving a user command configured to select a UI object displayed on the display 906, the controller 905 can perform an operation related to the object selected by the user command.

[0097] In some embodiments, the controller includes at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first interface to an n-th interface configured to input / output, a communication bus, etc.

[0098] The user can input a user command through a graphical user interface (GUI) displayed on the display 906, and the user input interface receives the user input command through the graphical user interface (GUI). Alternatively, the user can input a user command through input of a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through a sensor.

[0099] A "user interface" is a medium interface for interaction and information exchange between an application program or an operating system and a user, which realizes conversion between an internal form of information and a form acceptable by the user. A commonly used form of the user interface is a graphical user interface (GUI), which refers to a user interface related to computer operation displayed in a graphical manner. The graphical user interface can be an interface element such as an icon, a window, a control, and the like displayed in a display screen of an electronic device, and the control can include a visible interface element such as an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a widget, and the like.

[0100] Referring to Figure 3 Some embodiments of the present application provide a display device 10, which can be a liquid crystal display device. The display device 10 has a top side, a bottom side, a left side, a right side, a front side, and a back side. The left side and the right side of the display device 10 refer to the left side and the right side of a user when the user faces the display surface of the display device 10. Accordingly, the side of the display device 10 facing the user is the front side, and the side of the display device 10 away from the user is the back 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.

[0101] In some embodiments, the display device 10 includes a display panel 100 configured to display image information such as text, images, and the like.

[0102] In some embodiments, the display device 10 includes a backlight assembly 200 configured to provide backlight for the display panel 100.

[0103] In some embodiments, the display 906 includes the display panel 100 and the backlight assembly 200.

[0104] In some embodiments, the display device 10 includes an exciter 400 disposed on a side of the backlight assembly 200 away from the display panel 100, and the exciter 400 is configured to drive the backlight assembly 200 to vibrate.

[0105] Exemplarily, the backlight assembly 200 includes a lamp plate 210; the lamp plate 210 includes a plate body 230 and a light source 240 arranged on the plate body 230, and the light source 240 is located on a side of the plate body 230 facing the display panel 100. The plate 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). The light source 240 can be multiple and arranged on the plate body 230 at intervals.

[0106] In some embodiments, considering the size of the display device 10 and the manufacturing process of the lamp plate 210 and the like, the backlight assembly 200 includes multiple lamp plates 210 arranged in an array. Exemplarily, in combination with the subsequent Figure 6 , the backlight assembly 200 includes six lamp plates 210, three of which are arranged along the transverse direction of the display device 10, and two of which are arranged along the longitudinal direction of the display device 10.

[0107] In the embodiments of the present application, the display panel 100 is a liquid crystal display panel, and the multiple lamp plates 210 are arranged in a matrix on the back of the display panel 100 to provide backlight for the display panel 100. The exciter 400 transmits vibration to the display panel 100 by vibrating the lamp plate 210, so as not to affect the backlight provided by the lamp plate 210 for the display panel 100.

[0108] As Figure 3 shown, in some embodiments, a cavity M is formed between the lamp plate 210 of the backlight assembly 200 and the display panel 100, and the air in the cavity M can not flow with the external air, so that the cavity M is a sealed cavity. The light source 240 of the lamp plate 210 is located in the cavity M. The air in the cavity M has viscosity, and its kinematic viscosity is much higher than that of water. The cavity M can be equivalent to a damping spring configured to transmit vibration between the lamp plate 210 and the display panel 100, so that the display panel 100 vibrates to produce sound.

[0109] The display device 10 of some embodiments of the present application can be a liquid crystal display device. The display device 10 has a backlight module, which can be a direct backlight module, and the backlight module has a lamp plate to provide backlight for the display panel through the light source of the lamp plate. When the lamp plate vibrates, the gas in the cavity M is compressed, and the vibration is transmitted to the display panel through the cavity M to drive the display panel to vibrate. The display panel produces sound by emitting sound waves through vibration, so that the display panel can not only display pictures but also replace a loudspeaker to produce sound.

[0110] The gap size of the cavity M can be determined according to the size of the light source 240 of the lamp plate 210, for example, the gap size is related to the size of the light source. The light source such as the sub-millimeter light-emitting diode (Mini-LED) has a relatively compact size, so that the gap between the lamp plate and the liquid crystal display panel is relatively small, thereby reducing the thickness of the cavity M and improving the vibration transmission effect of the cavity M. Therefore, in the embodiment, the light source of the backlight module is a sub-millimeter light-emitting diode (Mini-LED).

[0111] For example, the gap of the cavity M can be 0.3mm-10mm, the maximum gap of the cavity M can be 10mm, or the gap of the cavity M can also be 0.3mm or 1mm, etc. For example, when the gap of the cavity M is 1mm, the thickness of the cavity M is relatively small, which can improve the transmission efficiency of the vibration force output by the exciter; or when the gap of the cavity M is 0.3mm, the distance between the exciter 400 and the display panel 100 is relatively close, and the vibration is more intense, so that the sound effect is better. When the gap of the cavity M is 10mm, the thickness of the cavity M is relatively large, which can avoid the mutual collision between the display panel and the light source at a certain position during vibration. Specifically, the gap of the cavity M can be 0.3mm-1mm, 1mm-2mm, 2mm-3mm, 3mm-4mm, 4mm-5mm, 5mm-6mm, 6mm-7mm, 7mm-8mm, 8mm-9mm, 9mm-10mm. For example, the gap of the cavity M can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. It should be noted that the numerical values and numerical ranges involved in the embodiments of the present application are approximate values, and there can be a certain range of errors due to the manufacturing process, which can be considered negligible by those skilled in the art.

[0112] Considering that the lamp plate 210 is usually provided in plurality, and the thickness of the lamp plate 210 is small, it is easy to deform under the action of the vibration force. Continuing to refer to Figure 3The backlight assembly 200 of some embodiments of the present application further includes a sound emitting plate 212, which can have a thickness of 1 mm to 4 mm, for example, 1 mm to 2 mm, 2 mm to 3 mm, or 3 mm to 4 mm. For example, the thickness of the sound emitting plate 212 can be 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, 2.2 mm, 2.5 mm, 2.7 mm, 3 mm, 3.3 mm, 3.5 mm, 3.8 mm, 3.9 mm, etc. The sound emitting plate 212 is attached to the side of the plate body 230 away from the display panel 100, for example, the sound emitting plate 212 is fixed to the lamp plate 210 by a double-sided adhesive or the like. In this way, the plurality of lamp plates 210 and the sound emitting plate 212 are connected as a whole, and the adjacent two lamp plates 210 have a tight joint seam.

[0113] In some embodiments, the lamp plate 210 can also dissipate heat through the sound emitting plate 212. For example, the sound emitting plate 212 includes a metal layer, which contacts and dissipates the heat of the lamp plate 210, thereby playing a role in dissipating heat of the lamp plate 210.

[0114] In some embodiments, the sound emitting plate 212 can be a sandwich panel or a carbon fiber panel. The sandwich panel can be any one of a honeycomb sandwich panel, a foam sandwich panel, a wood sandwich panel, and an acrylic panel, which is low in cost and easy to obtain. The honeycomb sandwich panel can be an aluminum honeycomb sandwich panel, an aramid honeycomb sandwich panel, etc. The foam sandwich panel can be a polyvinyl chloride (PVC) foam sandwich panel, a polymethacrylimide (PMI) foam sandwich panel, etc. The wood sandwich panel can be basswood or the like.

[0115] As is well known to those skilled in the art, the sound quality of sound can be measured in terms of volume, frequency response range, tone, etc. The sound emitted by the sandwich panel has higher volume and wider frequency response with smaller fluctuations than the sound emitted by the aluminum plate, that is, the sound emitted by the display device can have better sound quality by setting the sound emitting plate 212.

[0116] In some embodiments, the sandwich panel includes a core material and a skin attached to opposite sides of the core material. The skin can be made of glass fiber cloth, carbon fiber cloth, glass-carbon hybrid fiber, aluminum paper, plastic, etc. The core material can be paper, aramid, metal, or other hard foam materials.

[0117] In some embodiments, the damping of the sound emitting plate 212 is greater than the damping of the plate body 230, which has smaller density and mass than the plate body 230 in the related art.

[0118] By setting the sound board 212 with large damping, the equivalent damping of the lamp plate 210 can be improved, the equivalent density of the lamp plate 210 can be reduced, the bending modulus of the lamp plate 210 can be improved, the number of modal resonance frequencies can be increased, the frequency response transmitted to the display panel 100 can be improved, the frequency range of the sound emitted by the display panel 100 can be expanded, and the audio response of the display panel 100 can be avoided to have obvious peaks and valleys and distortion to affect the listening experience.

[0119] In some embodiments, the sound board 212 is a continuous solid structure, which can reduce the reflection of sound waves in the gap between adjacent two lamp plates 210, and avoid the excited sound waves from being distorted by multiple reflections in the gap.

[0120] It can be understood that a plurality of lamp plates 210 are arranged in an array on the sound board 212. In consideration of the acoustic effect of the display device, the smaller the gap between adjacent two lamp plates 210 is, the better, so as to avoid the gap between adjacent two lamp plates 210 from causing segmented vibration and affecting the acoustic effect. However, if the gap between adjacent two lamp plates 210 is too small, the adjacent two lamp plates 210 will collide when the lamp plate 210 vibrates, thereby generating noise. Therefore, the gap between adjacent two lamp plates 210 needs to be strictly controlled. The gap between adjacent two lamp plates 210 can be 1mm-2mm, for example, 1.2mm-1.3mm, 1.3mm-1.4mm, 1.4mm-1.5mm, 1.5mm-1.6mm, 1.7mm-1.8mm, 1.8mm-1.9mm, 1.9mm-2mm. For example, the gap between adjacent two lamp plates 210 can be 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, etc.

[0121] In some embodiments, in order to control the size of the gap between adjacent two lamp plates 210, the lamp plate 210 and the sound board 212 can be positioned by a plurality of positioning structures during assembly. One of the lamp plate 210 and the sound board 212 is provided with a positioning piece, and the other of the lamp plate 210 and the sound board 212 is provided with a positioning hole through which the positioning piece passes, so as to ensure the gap between adjacent two lamp plates 210.

[0122] Continuing to refer to Figure 3 In some embodiments, the sound board 212 can be a whole plate, and all the lamp plates 210 are arranged on the sound board 212, so as to facilitate the assembly of the lamp plate 210. The vibration output end of the exciter 400 is connected to the side of the sound board 212 away from the lamp plate 210, so that the arrangement of the exciter 400 does not affect the lamp plate 210 providing backlight for the display panel 100.

[0123] In combination with Figure 4In some other embodiments, the sound generating plate 212 is a strip-shaped plate which is connected with only part of the lamp plates 210. For example, the strip-shaped sound generating plate 212 can be arranged at the joint of two adjacent lamp plates 210, so that the structural strength of the lamp plates 210 can be ensured, the material of the sound generating plate 212 can be reduced, and the weight of the display device can be reduced.

[0124] The plurality of independent lamp plates 210 can be connected to form a whole through the connecting member 211. The connecting member 211 can be an adhesive member such as double-sided tape, foam and the like, and the connection is simple and convenient. Alternatively, the connecting member 211 includes a base layer and an adhesive layer arranged on the base layer, and the adhesive layer connects two adjacent lamp plates 210. The sound generating plate 212 is connected with the lamp plates 210 to form a whole through the connecting member 211.

[0125] One strip-shaped sound generating plate 212 can be arranged, or a plurality of strip-shaped sound generating plates 212 can be arranged and arranged at intervals along the length direction of the display panel 100. The number of the strip-shaped sound generating plates 212 is not limited in the embodiments of the present application.

[0126] In this embodiment, the vibration output end of the exciter 400 is connected with the strip-shaped sound generating plate 212. One exciter 400 can be arranged on one strip-shaped sound generating plate 212, or a plurality of exciters 400 can be arranged on one strip-shaped sound generating plate 212, and the plurality of exciters 400 are arranged at intervals along the length direction of the strip-shaped sound generating plate 212.

[0127] In some other embodiments, the display panel 100 is not provided with the sound generating plate, and the backlight assembly 200 includes a plurality of lamp plates 210 and a connecting member 211. The independent lamp plates 210 can be connected to form a whole through the connecting member 211. In this way, the exciter 400 directly transmits the vibration to the plurality of lamp plates 210, the vibration quality is relatively small, and the energy attenuation is slow. The exciter 400 supports the lamp plates 210, and the sound generating plate is not required, so that the assembly difficulty of the display device can be reduced, and the thickness of the display device can be reduced. Figure 5 The vibration output end of the exciter 400 is connected with the joint of the lamp plates 210, and specifically, the vibration output end of the exciter 400 is connected with the lamp plates 210 through the connecting member 211. The exciter 400 drives the lamp plates 210 to vibrate, the vibration force is transmitted to the display panel 100 through the equivalent damping spring of the cavity M, and the display panel 100 vibrates and generates sound.

[0128] Referring to

[0129] The plurality of lamp plates 210 are arranged in an array and connected, and the joint gaps of the lamp plates 210 are divided into two types. Figure 6

[0130] ​In some embodiments, the splicing gap extends along the lateral direction of the display device, which can be defined as a lateral splicing joint; accordingly, the connecting member 211 comprises a lateral connecting member extending along the lateral direction of the display device.

[0131] In some embodiments, the splicing gap extends along the longitudinal direction of the display device, which can be defined as a longitudinal splicing joint; accordingly, the connecting member 211 comprises a longitudinal connecting member extending along the longitudinal direction of the display device.

[0132] In some embodiments, the exciter 400 can be arranged on the lateral connecting member, and a plurality of exciters 400 can be arranged on the lateral connecting member; the plurality of exciters 400 can be arranged in a rectangular matrix on the plurality of lateral connecting members.

[0133] In some embodiments, the exciter 400 can be arranged on the longitudinal connecting member, and a plurality of exciters 400 can be arranged on the longitudinal connecting member; the plurality of exciters 400 can be arranged in a rectangular matrix on the plurality of longitudinal connecting members.

[0134] In some embodiments, the exciter 400 can be arranged on both the lateral connecting member and the longitudinal connecting member, for example, the exciter is arranged at the intersection of the lateral connecting member and the longitudinal connecting member; when a plurality of exciters 400 are arranged, at least one exciter 400 is arranged on the lateral connecting member, and at least one exciter 400 is arranged on the longitudinal connecting member.

[0135] In some embodiments, the lateral connecting member can extend to both ends of the lateral direction of the lamp panel 210, or the two ends of the lateral connecting member do not extend to both ends of the lateral direction of the lamp panel 210, and the extension length of the lateral connecting member is less than the lateral size of the lamp panel 210; for the whole formed by splicing all the lamp panels 210, a plurality of lateral connecting members can be arranged on one lateral splicing joint; or one lateral connecting member is arranged, and the two ends of the lateral connecting member extend to both ends of the lateral splicing joint; in this way, the reliability of the splicing of the lamp panel 210 is ensured.

[0136] In some embodiments, the longitudinal connecting member can extend to both ends of the longitudinal direction of the lamp panel 210, or the two ends of the longitudinal connecting member do not extend to both ends of the longitudinal direction of the lamp panel 210, and the extension length of the longitudinal connecting member is less than the longitudinal size of the lamp panel 210; for the whole formed by splicing all the lamp panels 210, a plurality of longitudinal connecting members can be arranged on one longitudinal splicing joint; or one longitudinal connecting member is arranged, and the two ends of the longitudinal connecting member extend to both ends of the longitudinal splicing joint; in this way, the reliability of the splicing of the lamp panel 210 is ensured.

[0137] The exciter 400 of some embodiments of the present application can be any one or more of an electromagnetic exciter, a magnetostrictive exciter and a piezoelectric exciter, and is more applicable. In some embodiments, the exciter 400 can include a magnetic field generating unit (such as a magnet) configured to generate a magnetic field, and a vibration coil, by inputting a constantly changing current in the vibration coil, so that the acting force of the vibration coil in the magnetic field generated by the magnetic field generating unit constantly changes, thereby generating vibration.

[0138] In combination Figure 7 , the exciter 400 of the embodiments of the present application includes a spring 420, the spring 420 has a spacing with the backlight assembly 200, specifically, the spring 420 has a spacing with the lamp plate 210, which is conducive to the spring 420 and the lamp plate contact heat transfer, and the spring 420 is configured to transmit the heat generated by the vibration of the exciter 400 to the side away from the vibration output end of the exciter 400.

[0139] In some embodiments, the exciter 400 further includes an exciter body 401 for mounting the exciter 400.

[0140] In some embodiments, the exciter 400 further includes an actuator 410, the vibration output end of the actuator 410 is connected with the backlight assembly 200, one end of the spring 420 is connected with the actuator 410, and the other end of the spring 420 is connected with the exciter body 401.

[0141] In some embodiments, the exciter 400 further includes an exciter body 401 for mounting the exciter 400.

[0142] In some embodiments, the exciter 400 further includes an actuator 410, the vibration output end of the actuator 410 is connected with the backlight assembly 200, one end of the spring 420 is connected with the actuator 410, and the other end of the spring 420 is connected with the exciter body 401.

[0143] When the exciter 400 is started, the actuator 410 vibrates and drives the lamp plate 210 to vibrate, and the vibration force is transmitted to the display panel 100 through the cavity M to drive the display panel 100 to vibrate and make sound. In this way, the display device of some embodiments of the present application can realize front side sound, and the sound image position and the picture center position are approximately coincident, realizing sound and picture integration, and the user's audio-visual effect is better.

[0144] In some embodiments, the central axis of the exciter 400 is perpendicular to the lamp plate 210, and the vibration output direction of the exciter 400 is along the central axis and perpendicular to the surface of the display device, that is Figure 7 the vertical direction.

[0145] The vibration output end of the actuating member 410 forms a connecting structure 411 to increase the connecting area of the actuating member 410 and the lamp plate 210, and avoid the actuating member 410 and the lamp plate from being separated from each other.

[0146] In some embodiments, the connecting structure 411 is in a sheet shape, which can increase the connecting area of the actuating member 410 and the lamp plate 210, and the sheet shape is conducive to reducing the weight of the exciter 400.

[0147] The center axis of the elastic wave 420 in some embodiments of the present application coincides with the center axis of the exciter 400. The elastic wave 420 includes a body part 4201 and first and second connecting parts 4202 and 4203 arranged at both ends of the body part 4201; the body part 4201 is arranged in the plane parallel to the display panel, the body part 4201 is annular, and the body part 4201 is wavy in the radial direction, so that the elastic wave 420 has elasticity. The inner end of the body part 4201 is bent to form the first connecting part 4202, and the first connecting part 4202 is connected to the actuating member 410; the outer end of the body part 4201 is bent to form the second connecting part 4203, and the second connecting part 4203 is connected to the exciter body 401.

[0148] In some embodiments, the first connecting part 4202 is a sheet-shaped connecting part, which can increase the connecting area of the first connecting part 4202 and the actuating member 410, and not only ensure the stability of the connection, but also facilitate heat transfer and heat dissipation.

[0149] In some embodiments, the second connecting part 4203 is a sheet-shaped connecting part, which can increase the connecting area of the second connecting part 4203 and the exciter body 401, and not only facilitate the improvement of the stability of the connection, but also facilitate heat transfer and heat dissipation.

[0150] The exciter 400 in some embodiments of the present application transmits the heat generated by the vibration of the actuating member 410 to the exciter body 401 through the elastic wave 420 for heat dissipation. In this way, the heat generated by the actuating member 410 can be dissipated not only through air but also through the elastic wave 420, which is conducive to reducing the temperature of the actuating member 410 and reducing the influence of local temperature on the image display quality. Moreover, the connecting area of the first connecting part 4202 and the actuating member 410 is increased, and the connecting area of the second connecting part 4203 and the exciter body 401 is increased, which not only facilitates the improvement of the stability of the connection, but also facilitates the improvement of the heat dissipation effect.

[0151] The elastic wave 420 of some embodiments of the present application increases the heat conduction path of the actuating member 410, the thermal conductivity of the elastic wave 420 is about 3-4 times that of copper, the transverse thermal conductivity of the elastic wave 420 can reach 1000 W / m·K, which is obviously more efficient than air cooling, can reduce the temperature of the actuating member 410, reduce the local temperature of the display device screen sound, avoid the appearance of "hot" spots on the screen, reduce the non-uniformity of screen brightness and color, and increase the maximum power and working reliability of the exciter or loudspeaker.

[0152] In some embodiments, the elastic wave 420 is bonded with the actuating member 410 and the exciter body 401, for example, the elastic wave 420 is bonded with the actuating member 410 and the exciter body 401 by glue, and the connection method is simple and stable.

[0153] Referring to Figure 7 and Figure 8 , the elastic wave 420 of some embodiments of the present application has a heat conduction layer 422, which facilitates heat transfer, so that the heat generated by the actuating member 410 is transferred to the exciter body 401 for heat dissipation, reducing the influence of the heat of the actuating member 410 on the image display quality. Among them, the heat conduction layer 422 has a higher thermal conductivity, which can be a metal material or a graphite layer.

[0154] In some examples, the heat conduction layer 422 is flexible, so that the elastic wave 420 has a certain elastic deformation ability.

[0155] Continuing to refer to Figure 7 and Figure 8 , in some embodiments, the elastic wave 420 further includes a fiber layer 421, and the fiber layer 421 and the heat conduction layer 422 are stacked. Among them, the fiber layer 421 includes but is not limited to mesh cloth, fiberglass mesh cloth, etc.

[0156] In one possible preparation method of the elastic wave 420 includes:

[0157] Step 1: provide a fiber layer 421, and form a heat conduction layer 422 on the fiber layer 421 to form an elastic wave base film;

[0158] Step 2: embossing and curing the elastic wave base film to form the elastic wave 420.

[0159] In one implementation of step 1, the heat conduction layer 422 is formed by coating, spraying, etc. on the fiber layer 421. Alternatively, the heat conduction film is connected by bonding, thermoplastic forming, etc. on the fiber layer 421 to form the heat conduction layer 422 on the fiber layer 421.

[0160] In step 2, the elastic wave base film is embossed in a mold and cured to form the elastic wave 420. Among them, the elastic wave base film is annular, after embossing and cooling and curing, the elastic wave 420 is formed.

[0161] The elastic wave 420 of some embodiments of the present application utilizes the fiber layer 421 as a framework and utilizes the fiber layer 421 and the heat-conducting layer 422 to form a composite, which not only has elasticity but also has high heat-conducting performance, is conducive to transferring the heat generated by the actuating member 410 to the exciter body 401, and reduces the heat generated by the actuating member 410 from being transferred to the display panel.

[0162] The thermal conductivity of the elastic wave 420 of some embodiments of the present application is several times that of general metal materials such as copper and aluminum, so that the heat of the actuating member 410 can be mainly transferred to the exciter body 401 through the elastic wave 420, the temperature of the vibration output end of the actuating member 410 is reduced, and the influence of the local temperature on the image display quality of the display device is reduced.

[0163] In some embodiments, referring to Figure 8 to Figure 10 , one of the fiber layer 421 and the heat-conducting layer 422 is multiple, and the fiber layer 421 and the heat-conducting layer 422 are adjacent. In this way, the fiber layer 421 and the heat-conducting layer 422 are alternately arranged in a stacked manner.

[0164] In some embodiments, referring to Figure 8 and Figure 10 , the fiber layer 421 is provided with two layers, and the heat-conducting layer 422 is located in the middle of the two layers of the fiber layer 421.

[0165] In other embodiments, referring to Figure 9 , the heat-conducting layer 422 is provided with two layers, and the fiber layer 421 is located in the middle of the two layers of the heat-conducting layer 422.

[0166] In still other embodiments, the elastic wave 420 includes multiple layers of the fiber layer 421 and multiple layers of the heat-conducting layer 422, and the multiple layers of the fiber layer 421 and the multiple layers of the heat-conducting layer 422 are alternately arranged in a stacked manner.

[0167] The elastic wave 420 of some embodiments of the present application improves the structural strength of the elastic wave 420 and improves the heat-conducting performance of the elastic wave 420 by arranging the fiber layer 421 and the heat-conducting layer 422 in an alternating stacked manner.

[0168] In combination with Figure 7In some embodiments, the heat-conducting layer 422 is in contact with the actuator body 401, which is conducive to improving the heat transfer efficiency and in turn improving the heat dissipation efficiency of the actuating member 410. When the heat-conducting layer 422 is located on at least one surface of the spring 420, the surface is directly in contact with the actuator body 401; when the heat-conducting layer 422 is located in the inner layer of the spring 420, for example, when the heat-conducting layer 422 is located between the two fiber layers 421, the fiber layer 421 of the spring 420 facing the actuator body 401 is provided with a notch, so that the heat-conducting layer 422 is arranged on the surface of the spring 420 and in contact with the actuator body 401. The second connecting portion 4203 of the spring 420 is provided with a notch corresponding to the fiber layer 421, so that the heat-conducting layer 422 is arranged on the surface of the spring 420 and in contact with the actuator body 401.

[0169] In combination Figure 11 to Figure 13 In some embodiments, the heat-conducting layer 422 is a heat-conducting film 423 provided with a plurality of through holes 4231. The heat-conducting film 423 is a film piece independent of the fiber layer 421, and a plurality of through holes 4231 are formed on the heat-conducting film 423. The through holes 4231 provided on the heat-conducting film 423 can be circular holes, elliptical holes, polygonal holes, irregularly shaped holes, etc.; the plurality of through holes 4231 can be arranged in a matrix on the heat-conducting film 423, such as a rectangular matrix, a circular matrix, etc. The number, shape and arrangement of the through holes 4231 are not limited in the embodiments of the present application.

[0170] The thickness of the heat-conducting film 423 can be 100 μm-1000 μm, and the thickness of the heat-conducting film 423 can be 100 μm-200 μm, 200 μm-300 μm, 300 μm-400 μm, 400 μm-500 μm, 500 μm-600 μm, 600 μm-700 μm, 700 μm-800 μm, 800 μm-900 μm, 900 μm-1000 μm; for example, 200 μm, 300 μm, 400 μm, 500 μm, 600 μm, 700 μm, 800 μm, 900 μm, etc.

[0171] Another possible preparation method of the spring 420 includes:

[0172] Step 1: providing a fiber layer 421 and a heat-conducting film 423, and providing a plurality of through holes 4231 on the heat-conducting film 423;

[0173] Step 2: stacking the fiber layer 421 and the heat-conducting film 423, embossing and curing to form the spring 420.

[0174] For example, a fiber mesh is used as raw material, and the fiber mesh is immersed in resin to form the fiber layer 421.

[0175] Exemplarily, the scale graphite is used as raw material to perform the oxidation and pulping process to form the graphene oxide slurry; then the graphene oxide slurry is coated on the base film, and then the sintering reduction and calendering process are performed to form the graphene film, which is used as the heat conduction film 423.

[0176] The heat conduction film 423 can be bonded by the resin of the fiber layer 421 so that the fiber layer 421 and the heat conduction film 423 are stacked, or the heat conduction film 423 is stacked with the fiber layer 421 by bonding or hot melting process.

[0177] The fiber layer 421 and the heat conduction film 423 can be both annular, and after the embossing forming and cooling and solidification, the elastic wave 420 is formed.

[0178] The elastic wave 420 of some embodiments of the present application sets the fiber layer 421 as the framework, sets the heat conduction film 423 and sets multiple through holes 4231 on the heat conduction film 423 to improve the heat dissipation efficiency of the heat conduction film 423, and the heat conduction film 423 can also have a certain flexibility.

[0179] In some examples, referring to Figure 13 , the heat conduction film 423 is provided with two layers, and the fiber layer 421 is arranged between the two layers of the heat conduction film 423.

[0180] In other examples, referring to Figure 11 and Figure 12 , the fiber layer 421 is provided with two layers, and the heat conduction film 423 is arranged between the two layers of the fiber layer 421.

[0181] In yet other examples, the heat conduction film 423 and the fiber layer 421 are respectively provided with multiple layers, and the heat conduction film 423 and the fiber layer 421 are alternately stacked.

[0182] The elastic wave 420 of some embodiments of the present application sets multiple fiber layers 421 to improve the structural strength of the elastic wave 420, and sets multiple heat conduction films 423 to improve the heat conduction performance of the elastic wave 420.

[0183] For the elastic wave 420 of the present embodiment, the heat conduction film 423 is in contact with the exciter body 401, which is beneficial to improve the heat transfer efficiency and in turn improve the heat dissipation efficiency of the actuating member 410.

[0184] Again referring to Figure 7The exciter 400 of some embodiments of the present application further comprises a compression ring 440 configured to compress the elastic wave 420 against the exciter body 401, and the compression ring 440 also has heat conduction performance. For example, the compression ring 440 can be a metal piece to facilitate heat transfer efficiency. The second connecting portion 4203 of the elastic wave 420 is compressed against the exciter body 401 by the compression ring 440, which facilitates the stability and tightness of the connection between the elastic wave 420 and the exciter body 401, and facilitates heat transfer.

[0185] For example, the compression ring 440 and the exciter body 401, and the compression ring 440 and the elastic wave 420 can be bonded, which is a simple and stable connection method.

[0186] Continuing to refer to Figure 7 Taking the exciter 400 as an example of an electromagnetic exciter, the electromagnetic exciter comprises a magnetic assembly 450 and a voice coil, wherein the magnetic assembly 450 is configured to generate a magnetic field, and the voice coil vibrates in the magnetic field along the axial direction of the voice coil.

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

[0188] One end of the voice coil is connected to the lamp plate 210, and a connecting structure 411 can also be arranged between the voice coil and the lamp plate 210 to increase the connection area between the voice coil and the lamp plate 210 and prevent the voice coil and the lamp plate 210 from detaching from each other. The other end of the voice coil is inserted into the magnetic air gap N, and the voice coil is fixed to the exciter body 401 by the elastic wave 420. With the change of the magnetic field, the voice coil is forced to move reciprocally along its axial direction. That is, when the exciter 400 is an electromagnetic exciter, the voice coil constitutes the actuator 410, and one end of the actuator 410 away from its vibration output end is located in the magnetic air gap N.

[0189] In this way, under the action of the magnetic field, the electromagnetic force causes the voice coil to resonate at a high frequency, which directly vibrates the lamp plate 210, and the reaction force of the electromagnetic force causes the exciter 400 with a large mass to resonate at a low frequency, and vibrates the lamp plate 210 through the sound emitting plate 212 or the connecting piece 211. The exciter body 401 has no fixed support, but vibrates with the vibration of the driven lamp plate 210, which is the biggest difference between the exciter shell fixed to the support excitation mode of the OLED screen.

[0190] The exciter body 401 of some embodiments of the present application comprises a magnetic assembly 450 and a shell 430, the shell 430 is configured to support the magnetic assembly 450 and is configured to realize the elastic installation of the exciter 400. The magnetic conductive piece 451 is fixedly connected with the shell 430. Specifically, the magnetic conductive piece 451 of some embodiments of the present application comprises a U-shaped body and a third connecting portion, the two ends of the opening of the U-shaped body are bent away from each other to form the third connecting portion, and the third connecting portion is connected with the shell 430.

[0191] The second connecting portion 4203 of the elastic wave 420 is pressed on the magnetic conductive piece 451 by the compression ring 440. Specifically, the second connecting portion 4203 and the magnetic conductive piece 451 are bonded, the compression ring 440 and the magnetic conductive piece 451 are bonded, and the compression ring 440 and the shell 430 are bonded, and the connection mode is simple and stable.

[0192] The exciter 400 of some embodiments of the present application reduces the width size of the exciter 400 by connecting the elastic wave 420 and the magnetic conductive piece 451. Since the axial size of the actuator 410 is large, the lamination and compression of the compression ring 440, the magnetic conductive piece 451 and the shell 430 will not affect the overall thickness of the exciter 400. By arranging the connection mode of the elastic wave 420 in this way, not only the stability of the connection can be ensured, but also the compact structure of the exciter 400 can be realized.

[0193] Continuing to refer to Figure 7 , the part of the magnetic conductive piece 451 in contact with the elastic wave 420 is provided with a ventilation hole to improve the heat dissipation efficiency of the magnetic conductive piece 451 and improve the heat dissipation amount of the actuator 410 through the elastic wave 420. The ventilation hole can be a circular hole, and the shape, number and arrangement mode of the ventilation hole are not limited in the embodiments of the present application.

[0194] In some possible embodiments, the part of the shell 430 in contact with the magnetic conductive piece 451 is provided with a ventilation hole, which can be opposite to the ventilation hole, to further improve the heat dissipation efficiency. The ventilation hole can be a circular hole, and the shape, number and arrangement mode of the ventilation hole are not limited in the embodiments of the present application.

[0195] In combination with Figure 3 and Figure 4 , the display device 10 of some embodiments of the present application further comprises a back plate 500 arranged at the back side of the backlight assembly 200 and configured to support the backlight assembly 200 and the display panel 100. The material of the back plate 500 can be aluminum alloy, steel, etc. to provide effective support.

[0196] As Figure 3As shown, the back plate 500 is connected with the sound board 212, and the back plate 500 is connected with the sound board 212 through the first adhesive 505 in an example. The first adhesive 505 can be double-sided tape, foam, or the like. The back plate 500 is provided with an opening 503, and the actuator 410 of the exciter 400 is connected with the lamp plate 210 through the opening 503. In this way, the back plate 500 does not need to be provided with a convex bump, but only needs to be provided with the opening 503, which is beneficial to simplify the structure of the back plate 500, facilitate processing, and reduce costs. In addition, the back plate 500 is not arranged at the position corresponding to the exciter 400, which is beneficial to reduce the thickness of the display device.

[0197] As Figure 4 mentioned, the back plate 500 can be connected with the lamp plate 210 through the connecting piece 211, and the back plate 500 is provided with a convex bump 504 at a position corresponding to the sound board 212. The convex bump 504 protrudes away from the lamp plate 210 to accommodate the sound board 212.

[0198] Referring to Figure 14 When the sound board is not arranged, the back plate 500 is arranged on the side of the lamp plate 210 away from the display panel 100, and the back plate 500 is connected with the lamp plate 210 through the first adhesive 505. The first adhesive 505 can be arranged in multiple, so that the distances between different positions of the lamp plate 210 and the back plate 500 are all within a preset range, that is, the lamp plate 210 has a relatively uniform vibration amplitude at different positions, and noise is avoided during vibration of the lamp plate 210. In addition, the first adhesive 505 can limit the lamp plate 210, so that the display device 10 is not deformed after assembly, and the vibration sound is not affected.

[0199] In some embodiments, the first adhesive 505 is arranged between two adjacent lamp plates 210, and the first adhesive 505 constitutes a connecting piece, so that the two adjacent lamp plates 210 are spliced through the first adhesive 505. In this way, the first adhesive 505 splices the plurality of lamp plates 210 while connecting the lamp plate 210 with the back plate 500, which is beneficial to simplify the assembly process of the display device 10 and improve production efficiency.

[0200] In some embodiments, the back plate 500 includes a back plate body 501 and a first side plate 502. The back plate body 501 is configured to support the lamp plate 210 and the display panel 100, and the back plate body 501 is provided with an opening 503. The first side plate 502 extends along the edge of the back plate body 501 and protrudes the back plate body 501 towards the side of the display panel 100, that is, the first side plate 502 protrudes the front side of the back plate body 501. In this way, the first side plate 502 is arranged outside the circumferential direction of the lamp plate 210 and the display panel 100.

[0201] Continuing to refer to Figure 14In some embodiments, the shell 430 of the exciter 400 is connected with the back plate 500 through a fixing pin 480, which can be perpendicular to the back plate 500. An elastic pad 460 is arranged on the shell 430, and the shell 430 is connected with the back plate 500 through the elastic pad 460.

[0202] The material of the elastic pad 460 can be silica gel, rubber, etc. The elastic pad 460 can be sleeved outside the fixing pin 480. A matching hole is arranged on the shell 430, and a clamping groove for clamping the shell 430 is arranged on the outer wall surface of the elastic pad 460. In this way, the two sides of the matching hole each have a part of the elastic pad 460, that is, the cross-sectional shape of the elastic pad 460 is approximately in the shape of an I-beam, so that the shell 430 does not interfere with the fixing pin 480 or the back plate 500 during vibration of the exciter 400. The structure, material, etc. of the elastic pad 460 are not limited in the embodiment.

[0203] The elastic force direction of the elastic pad 460 is parallel to the thickness direction of the display device 10, so that the shell 430 and the back plate 500 have a variable relative position. That is, the shell 430 can reciprocally move relative to the back plate 500 during vibration of the exciter 400. At this time, the exciter 400 also constitutes an approximately inertial driving mode to drive the lamp plate 210 to vibrate, so that the relative fixation of the shell 430 and the back plate 500 does not affect the frequency response of the display device 10.

[0204] Referring to Figure 15 and Figure 16 In other embodiments, the end of the shell 430 is provided with a damping block 470, which can be double-sided adhesive tape, foam, etc. The damping block 470 can be connected with the side of the lamp plate 210 facing the back plate 500. In this way, the shell 430 and the lamp plate 210 have a large relative movement amplitude, which is conducive to realizing that the exciter 400 drives the display panel 100 to vibrate in an inertial driving mode.

[0205] In this way, the exciter 400 can generate a vibration with a high frequency when working and drive the lamp plate 210 to vibrate. Through the reaction force of the actuator 410, the shell 430 can drive the lamp plate 210 to vibrate with a low frequency, that is, the shell 430 vibrates with the lamp plate 210, and the exciter 400 constitutes an inertial driving mode to drive the lamp plate 210 to vibrate.

[0206] In Figure 15 and Figure 16 the display device structure shown, no sound-emitting plate is arranged; for a display device provided with a sound-emitting plate, the connection mode of the exciter 400 can also refer to Figure 15 and Figure 16 ; in the connection mode of the exciter 400 shown in Figure 16 , the damping block 470 can be connected with the whole sound-emitting plate.

[0207] With reference to the foregoing Figure 14 and Figure 15 , the display panel 100 of the embodiments of the present application further comprises a display film layer 120, which can be a liquid crystal film layer.

[0208] In some embodiments, the display device further comprises an optical film assembly 110, which is arranged on the side of the display film layer 120 facing the lamp panel 210.

[0209] The display film layer 120 can include a color filter (CF) substrate, a thin film transistor (TFT) substrate (also referred to as an array substrate), and a liquid crystal (LC) layer between the color filter substrate and the array substrate. The thin film transistor substrate is provided with data lines and scan lines, and the direction of the liquid crystal molecules is controlled by whether the data lines and scan lines are energized, so that the light of the backlight is emitted through the color filter substrate and a picture of a preset color is generated.

[0210] According to the type of light emitted by the lamp panel 210, the optical film assembly 110 can be of different types. For example, when the lamp panel 210 emits white light, the optical film assembly 110 can include a reflective sheet, a light guide plate, a brightness enhancement film, etc. The reflective sheet is attached to the surface of the lamp panel 210 where the light source is arranged.

[0211] When the lamp panel 210 emits blue light, the optical film assembly 110 can include a diffusion film 113, a fluorescent film 112, and a brightness enhancement film 111. The diffusion film 113 is arranged on the front side of the lamp panel 210 and is configured to mix the light of the plurality of lamp panels 210 uniformly, i.e., to convert the point lamp panel into a surface lamp panel. The fluorescent film 112 converts the light emitted by the lamp panel 210 into white light. In this way, the color of the light emitted by the lamp panel 210 is not limited, and the lamp panel 210 can emit blue light or purple light. The brightness enhancement film 111 is configured to improve the brightness of the light. It can be understood that when the lamp panel 210 emits white light, the optical film assembly 110 can also include a diffusion film 113, a fluorescent film 112, and a brightness enhancement film 111. The embodiments are described by way of example with the optical film assembly 110 including a diffusion film 113, a fluorescent film 112, and a brightness enhancement film 111.

[0212] In some embodiments, the edges of the display panel 100 are sealingly connected to the edges of the lamp panel 210, so as to form a sealed cavity M between the display panel 100 and the lamp panel 210.

[0213] In some embodiments, the display panel 100 and the optical film assembly 110 can also be bonded and fixed to each other, for example, by using UV glue, foam, double-sided adhesive, etc.

[0214] That is, the display panel 100 and the optical film assembly 110 can be fixedly connected as a whole by bonding, at this time, the cavity M is formed between the optical film assembly 110 and the lamp plate 210.

[0215] When the display panel 100 and the optical film assembly 110 are pressed against each other, there can be a gas gap between the display panel 100 and the brightness enhancement film 111, between the brightness enhancement film 111 and the fluorescent film 112, and between the fluorescent film 112 and the diffusion film 113, the cavity M is formed between the display panel 100 and the lamp plate 210, and the gas gap is in a closed state.

[0216] Specifically, the display device 10 includes a second adhesive 250 with adhesion, which is double-sided tape or foam, etc., wherein the second adhesive 250 extends along the edge of the lamp plate 210, and the optical film assembly 110 and the lamp plate 210 are fixedly bonded by the second adhesive 250, that is, the diffusion film 113 and the lamp plate 210 are fixedly bonded by the second adhesive 250. In this way, a closed cavity M is formed between the optical film assembly 110 and the lamp plate 210, which can be filled with air, nitrogen, etc.

[0217] In combination Figure 17 The display device of some embodiments of the present application further includes a support 300, which can be made of silicone or rubber, etc. The support 300 can be provided in multiple, and the multiple supports 300 are arranged at intervals between the display panel 100 and the backlight assembly 200.

[0218] In related technologies, compared with display devices with OLED light sources as light sources, because the OLED display screen is a self-luminous screen, and the OLED display screen itself has a certain flexibility, an exciter can be arranged on the back of the OLED display screen, so that the OLED display screen deforms elastically and emits sound under the excitation vibration of the exciter. In liquid crystal display devices, the liquid crystal display device has a backlight module, and it is not possible to directly arrange an exciter on the back of the display panel, and the lamp plate in the backlight module has a large hardness, and it is difficult to couple and transmit the vibration of the lamp plate to the display panel, and the transmission efficiency of the vibration force is low. Therefore, a support can be arranged between the display panel and the lamp plate of a Mini-LED display device or other liquid crystal display device, and the support can be used as a transmission medium for vibration to transmit the vibration of the lamp plate to the display panel, thereby improving the transmission efficiency of the vibration from the lamp plate to the display panel. In addition, the support can maintain the gap of the cavity M between the lamp plate and the display panel within a predetermined range, avoiding the risk of collision noise and abrasion caused by the light source and the display panel touching each other at a certain position.

[0219] In some embodiments, there is a problem in the vibration transmission process of the exciter 400, the air gap thickness between the display panel 100 and the lamp plate 210 of the backlight assembly 200 has a large change due to material tolerance, assembly process tolerance, and self-gravity, etc., which causes the vibration transmission efficiency consistency to be unable to be guaranteed, and the display panel 100 and the lamp plate 210 are attached, which causes vibration noise and abrasion.

[0220] To avoid the above risks, some embodiments of the present application increase a support 300 between the display panel 100 and the lamp plate 210, the support 300 has the following characteristics: one side is in contact with the display panel 100, and the other side is in contact with the lamp plate 210, one side or both sides are respectively connected to the contact position by a mechanical structure or a pasting fixing mode, and the support 300 can include a buffer part, which can be a high-resilience material or a material combination with resilience function, such as silica gel. The support 300 can ensure the size stability of the air gap between the display panel 100 and the lamp plate 210, avoid abnormal collision noise between the display panel 100 and the lamp plate 210, and the solid support 300 improves the transmission efficiency of the vibration from the lamp plate 210 to the display panel 100.

[0221] By setting the support 300 between the lamp plate 210 and the diffusion film 113, the optical film assembly 110 and the lamp plate 210 can be connected as a whole, that is, it can be equivalent to a single-layer screen, which avoids the relative movement between the optical film assembly 110 and the lamp plate 210 due to the too large cavity M gap.

[0222] And because the optical film assembly 110 converts and homogenizes the light generated by the light source of the lamp plate 210, even if the support 300 is set on the light-emitting side of the lamp plate 210, no shadow will be generated on the display panel 100, causing the display panel 100 to have uneven brightness. In this way, the shape and size of the support 300, the contact area between the support 300 and the diffusion film 113, etc. can not be limited. The cross section (the cross section is perpendicular to the display device) shape of the support 300 can be rectangular, cylindrical; the cross section shape of the support 300 can also be conical, trapezoidal, dumbbell-shaped or other shapes, etc.

[0223] In some embodiments, the support 300 is interference set between the display panel 100 and the lamp plate 210, that is, the combination of the two ends of the support 300 and the display panel 100 and the lamp plate 210 can adopt a size interference fit design, that is, the size of the support 300 in the thickness direction of the display device is greater than the design size of the interval between the display panel 100 and the lamp plate 210.

[0224] In some embodiments, the support 300 can be connected to the lamp plate 210 through a first adhesive structure, such as UV glue, double-sided tape, etc., to avoid the movement of the support 300 relative to the lamp plate 210.

[0225] The support 300 is provided with a welding structure near one side of the lamp plate 210, and the support 300 is fixed to the lamp plate 210 through the welding structure. For example, a metal weldable material structure is injection molded or mechanically matched or bonded in the support 300, and the welding structure is fixed to the lamp plate 210 through welding, so as to fix the support 300. This way can make the support 300 firmly installed, and is conducive to batch automatic assembly.

[0226] In addition, the material of the support 300 can be an elastic material such as silicone rubber, but the elastic material has the problem of hardness change caused by temperature change. When the display device is working, the internal temperature changes, which can cause the hardness of the support 300 to change, thereby affecting the support and vibration transmission optimization of the support 300. The optimization can be realized by double-material composite. The elastic material part ensures the vibration buffering effect, and the non-elastic material part, i.e., the welding structure, ensures that the vibration transmission effect does not change with temperature change.

[0227] The two ends of the support 300 can be connected by negative pressure adsorption. For example, the two ends of the support 300 can be provided with suction disc structures, and the two ends of the support 300 are fixedly connected with the lamp plate 210 and the display panel 100 through the suction disc structures. The process is simple to realize.

[0228] The support 300 is distributed in multiple circles with the exciter 400 as the center. In the direction away from the exciter 400, the distribution density of the support 300 decreases.

[0229] In some embodiments, the number of supports 300 is large, which affects the process assembly difficulty. Some embodiments of the present application propose a support 300 quantity optimization scheme under the premise of ensuring vibration buffering and vibration transmission effect. The support 300 is arranged non-uniformly according to the distance from the installation position of the exciter 400. The exciter 400 position vibrates most violently, and the arrangement density of the support 300 is the largest. The vibration amplitude away from the exciter 400 position is small, and the arrangement density of the support 300 decreases. In this way, the vibration buffering and vibration transmission effects of the entire display device area are more uniform, and the number of supports 300 is optimized, which is conducive to reducing the implementation cost and process assembly difficulty of the display device.

[0230] In combination Figure 18 In some embodiments, a plurality of independent lamp plates 210 are spliced by a connecting piece 211, and the connecting piece 211 can be in a strip shape.

[0231] In some embodiments, the connectors 211 can include two types, i.e., a first type of connector and a second type of connector. The first type of connector is located on the side of the lamp panel 210 away from the display panel 100, and the vibration output end of the exciter 400 can be connected with the first type of connector. The second type of connector is located on the side of the lamp panel 210 facing the display panel 100, and the second type of connector can connect the plurality of support members 300 into one body. For example, the second type of connector is integrally formed with the plurality of support members 300.

[0232] In some embodiments, the support members 300 are installed in a large number, and there is a problem of complex process. To optimize this problem, some embodiments of the present application connect the support members 300 into one body through the second type of connector, thereby effectively reducing the installation difficulty of the support members 300.

[0233] In combination Figure 19 The display device of some embodiments of the present application further includes a rear shell 700. The rear shell 700 is located on the side of the exciter 400 away from the lamp panel 210, i.e., the rear shell 700 is arranged on the rear side of the exciter 400. The rear shell 700 is located on the side of the backlight assembly 200 away from the display panel 100. The rear shell 700 can be an appearance shell of the display device. The controller and the electric connection wire of the display device can be arranged between the back plate 500 and the rear shell 700, so as to simplify the appearance of the display device. The material of the rear shell 700 can be plastic, metal, etc.

[0234] Continuing to refer to Figure 19 In some embodiments, the exciter 400 is located between the rear shell and the backlight assembly 200, and the actuator 410 of the exciter 400 can also be connected with the rear shell 700, for example, the actuator 410 is bonded, screwed or clamped with the rear shell 700. In this way, the actuator 410 can drive the rear shell 700 to vibrate and make sound synchronously in the vibration process, so as to improve the sound intensity of the display device. The actuator 410 can be directly connected with the rear shell 700, or the actuator 410 can be indirectly connected with the rear shell 700.

[0235] In some implementations, the exciter 400 further comprises a vibration transmission structure 490, the actuating member 410 is connected with the back shell 700 through the vibration transmission structure 490, so as to excite the back shell 700 to vibrate. One end of the vibration transmission structure 490 is connected with the connecting structure of the actuating member 410, and a through hole is arranged on the magnetic member 452 and the shell 430 of the exciter 400, and the other end of the vibration transmission structure 490 passes through the through hole and is connected with the back shell 700. In this way, when the exciter 400 works, there are forward vibration and backward vibration. The forward vibration is transmitted to the lamp plate 210 through the actuating member 410 and is transmitted to the display panel 100; the backward vibration is transmitted to the back shell 700 through the vibration transmission structure 490, and the back shell 700 vibrates to generate sound waves. And because the low-frequency sound has no directivity, it can be superimposed and enhanced with the sound of the display device forward, so as to achieve the purpose of improving the intensity of low-frequency sound.

[0236] In some embodiments, the vibration transmission structure 490 can be connected with the back shell 700 through an adhesive buffer structure 491, which includes but is not limited to double-sided tape, foam, etc. In order to ensure the transmission effect of the vibration to the back shell 700, the vibration transmission structure 490 is generally made of hard material, and the vibration transmission structure 490 and the back shell 700 are hard structures. If they are directly contacted, the hard structure collision at the contact position will produce noise. The setting of the adhesive buffer structure 491 can effectively avoid the problem of noise caused by the hard structure collision at the contact position due to the direct contact between the vibration transmission structure 490 and the back shell 700.

[0237] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0238] In order to facilitate explanation, the above description has been made in combination with specific embodiments. However, the above exemplary discussion is not intended to exhaust or limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained according to the above teachings. The selection and description of the above embodiments are for better explanation of the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A display device, characterized by comprising: The application relates to a display panel, a backlight assembly, an exciter and a display device. The display panel is configured to display image information. The backlight assembly is configured to provide backlight for the display panel. A cavity is formed between the backlight assembly and the display panel. The exciter is arranged on a side of the backlight assembly away from the display panel, and the exciter is configured to drive the backlight assembly to vibrate. The exciter comprises a spring wave having a space with the backlight assembly, and the spring wave is configured to transfer heat generated by vibration of the exciter to a side away from a vibration output end of the exciter. The exciter further comprises an exciter body and an actuator, and a vibration output end of the actuator is connected with the backlight assembly.

2. The display device of claim 1, wherein, Two ends of the spring wave are connected with the exciter body and the actuator respectively, and the spring wave is used for transferring heat of the actuator to the exciter body. The spring wave has a heat conduction layer, and the heat conduction layer is in contact with the exciter body.

3. The display device of claim 2, wherein, The spring wave further comprises a fiber layer, and the heat conduction layer and the fiber layer are arranged in a stack and formed as an integral piece.

4. The display device of claim 3, wherein, One of the fiber layer and the heat conduction layer is a plurality of layers, and the fiber layer and the heat conduction layer are adjacent to each other.

5. The display device of claim 4, wherein, The heat conduction layer is a heat conduction film, and a plurality of through holes are arranged on the heat conduction film.

6. The display device of claim 3, wherein, The exciter further comprises a compression ring configured to compress the spring wave on the exciter body.

7. The display device according to any of claims 2-6, characterized in that, The exciter body comprises a magnetic assembly, and the magnetic assembly comprises a magnetic conducting piece and a magnetic piece.

8. The display device according to any of claims 2-6, characterized in that, An end of the actuator away from the vibration output end is located in a magnetic air gap formed between the magnetic conducting piece and the magnetic piece. One end of the spring wave is connected with the magnetic conducting piece.

9. The display device of claim 8, wherein, A ventilation hole is arranged on a part of the magnetic conducting piece in contact with the spring wave.

10. The display device according to any of claims 2-6, characterized in that, The spring wave comprises a body part and first and second connecting parts arranged at two ends of the body part. The first connecting part is connected with the actuator, and the second connecting part is connected with the exciter body.

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