Display device

Abstract

The utility model discloses a display device. The display device comprises a liquid crystal display panel; the backlight module is located on the light incident side of the liquid crystal display panel, and the backlight module comprises a back plate; the at least one exciter is fixed to the side, away from the liquid crystal display panel, of the back plate, and the exciter is used for driving the back plate to vibrate and produce sound; and the buffer mechanism is positioned between the back plate and the liquid crystal display panel. In the display device, a loudspeaker structure in the prior art is completely replaced by the exciter, so that sound can be guided out without a sound outlet hole in the device, the appearance of the device can be more attractive, and the buffer mechanism can counteract most impact of vibration of the back plate on the liquid crystal display panel; the liquid crystal display panel vibrates slightly when the back plate vibrates, so that the influence on deflection of liquid crystal molecules in the liquid crystal display panel can be avoided, the display effect of the liquid crystal display panel is not influenced, and the manufacturing cost of the display device can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, in particular to a display device. Background Art

[0002] At present, speakers are commonly used in various products with sound-generating functions. After more than 100 years of technological changes, the design and manufacture of speakers have developed into all walks of life. The sounds produced by different types of speakers vary greatly. Some speakers have delicate and soft sounds, while others have full bass sounds. However, no matter what type of speaker, the sound needs to be exported to the environment so that users can experience the most realistic sound of the speaker.

[0003] like Figure 1 and Figure 2 As shown, the conventional practice now is to install the speaker inside the machine, and make a hole or grille structure 02 at the position opposite to the diaphragm of the speaker 01 of the machine, and the sound emitted by the speaker 01 comes out through these grilles or holes. Due to the limitations of this sound-generating method, the sound outlet hole is indispensable, which will inevitably affect the appearance of the machine. Utility Model Content

[0004] The utility model provides a display device, which can ensure the consistency and uniformity of the appearance, making the appearance more beautiful, and does not affect the display effect of the liquid crystal display panel, thereby reducing the production cost.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A display device, comprising:

[0007] Liquid crystal display panel;

[0008] A backlight module, the backlight module is located at the light incident side of the liquid crystal display panel, and the backlight module includes a back plate;

[0009] At least one exciter, the at least one exciter is fixed to a side of the back plate away from the liquid crystal display panel, the exciter is used to drive the back plate to vibrate and generate sound;

[0010] A buffer mechanism is located between the back plate and the liquid crystal display panel.

[0011] Optionally, the back plate includes a bottom plate and a side plate, the side plate is connected to the edge of the bottom plate, and the side plate and the bottom plate enclose a receiving space;

[0012] The liquid crystal display panel is located on a side of the side plate away from the bottom plate;

[0013] The exciter is located on the side of the bottom plate away from the liquid crystal display panel;

[0014] The buffer mechanism includes a buffer pad, and the buffer pad is located in the accommodation space;

[0015] The backlight module further includes a backlight assembly, the backlight assembly is located in the accommodation space and on the side of the buffer pad away from the bottom plate, and the backlight assembly is used to provide a surface light source for the liquid crystal display panel.

[0016] Optionally, the Shore hardness of the buffer pad is 20 to 50 degrees.

[0017] Optionally, the thickness of the buffer pad in the first direction is 1 mm to 2 mm, and the first direction is the arrangement direction of the liquid crystal display panel and the backplane.

[0018] Optionally, the backlight assembly includes a lamp bar, a light guide plate, a reflector and an optical film;

[0019] The light guide plate is located on the side of the buffer pad away from the bottom plate;

[0020] The lamp board is attached to the inner side of the side plate, and the light-emitting side of the lamp board faces one side of the light guide plate;

[0021] The reflector is attached to the side of the light guide plate facing the buffer pad;

[0022] The optical film is located on the side of the light guide plate away from the buffer pad.

[0023] Optionally, it further includes a rubber frame, the rubber frame includes a main body part and a support part, the main body part is located outside the side plate, and the main body part is fixedly connected to the side plate;

[0024] The support part is connected to the main body part, and the support part is located on the side of the side plate away from the bottom plate;

[0025] The liquid crystal display panel is located on the side of the support part away from the bottom plate.

[0026] Optionally, the buffer mechanism further includes a vibration absorption layer, and the vibration absorption layer is located between the liquid crystal display panel and the support part.

[0027] Optionally, the vibration absorption layer is a double-sided foam tape.

[0028] Optionally, it further includes a first shock pad, and the first shock pad is located between the main body part and the side plate.

[0029] Optionally, the first shock pad is a shock-absorbing foam, and the shock-absorbing foam is attached to the side plate.

[0030] Optionally, the area of the back plate opposite to the actuator has a hollowed-out area.

[0031] Optionally, the actuator includes a mounting bracket, a voice coil, a vibrator, and an elastic element;

[0032] The mounting bracket has an assembly groove on the side facing the back plate;

[0033] The voice coil is fixed in the assembly groove, and the center line of the voice coil extends in the first direction;

[0034] The vibrator is located in the assembly groove and on the side of the voice coil close to the back plate, and the voice coil is used to drive the vibrator to vibrate;

[0035] The elastic element is connected to the mounting bracket, and the vibrator is used to drive the elastic element to vibrate.

[0036] Optionally, the actuator further includes a second shock pad, which is located on the side of the mounting bracket facing the back plate.

[0037] Optionally, both ends of the mounting bracket have at least one connection hole facing the back plate;

[0038] The side of the back plate facing the actuator has connection posts corresponding to the connection holes, and the connection posts have threaded holes opposite to the connection holes;

[0039] The actuator further includes buffer feet and first screws corresponding to the connection holes one by one. The buffer feet are sleeved on the connection posts, and the screw rods of the first screws pass through the connection holes and are threadedly connected to the threaded holes on the connection posts, so that the mounting bracket is fixedly connected to the back plate.

[0040] Optionally, the actuator further includes a magnetic circuit assembly, and the magnetic circuit assembly includes a magnet, a washer, and a magnetic bowl connected to each other;

[0041] The magnet is located inside the voice coil, and there is a first gap between the magnet and the voice coil;

[0042] The washer is located on the side of the magnet close to the vibrator;

[0043] The magnetic bowl is located between the washer and the vibrator. The side of the magnetic bowl facing the vibrator is fixedly connected to the vibrator, and the side of the magnetic bowl facing the washer has a groove;

[0044] The voice coil, the magnet, and the washer are located in the groove, and there is a second gap between the outer wall of the voice coil and the inner wall of the magnetic bowl;

[0045] The elastic element is sleeved on the outer side of the magnetic bowl.

[0046] The utility model provides a display device, which includes a liquid crystal display panel, a backlight module, at least one actuator and a buffer mechanism; wherein the backlight module is located on the light incident side of the liquid crystal display panel, the actuator can be fixed on the side of the back plate away from the liquid crystal display panel, and the actuator is used to drive the back plate to vibrate and make sounds. When the back plate vibrates and makes sounds, the liquid crystal display panel will be driven by the back plate, and the sound will be transmitted to the liquid crystal display panel through the back plate and then to the light emitting side of the liquid crystal display panel. This unique sounding mode completely replaces the structure of the speaker in the prior art by the actuator, so that the device does not need to be provided with a sound outlet to export the sound, ensuring the consistency and uniformity of the appearance of the device, making the appearance of the device more beautiful, and avoiding the problem of dust accumulation, and improving the waterproof performance of the device to a certain extent. In addition, since there is a buffer mechanism between the back plate and the liquid crystal display panel, the buffer mechanism can offset most of the impact of the vibration of the back plate on the liquid crystal display panel, so that the vibration of the liquid crystal display panel is lighter when the back plate vibrates, thereby avoiding the influence on the deflection of the liquid crystal molecules in the liquid crystal display panel, and does not affect the display effect of the liquid crystal display panel, thereby reducing the manufacturing cost of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of a machine with a speaker in the related art;

[0048] Figure 2 for Figure 1 Enlarged view of area A in the middle;

[0049] Figure 3 A schematic diagram of the structure of a display device provided in an embodiment of the utility model;

[0050] Figure 4 for Figure 3 Enlarged view of middle area B;

[0051] Figure 5 for Figure 3 Enlarged view of middle area C;

[0052] Figure 6 for Figure 3 Another enlarged view of the middle area C;

[0053] Figure 7 An exploded view of a display device provided in an embodiment of the utility model;

[0054] Figure 8 An exploded diagram of an exciter provided in an embodiment of the utility model;

[0055] Figure 9 forFigure 3 Enlarged view of the middle region D;

[0056] Figure 10 External dimension drawing of an exciter provided in an embodiment of the present utility model;

[0057] Figure 11 External dimension drawing of a horn in the prior art;

[0058] Figure 12 An SPL curve graph provided in an embodiment of the present utility model;

[0059] Figure 13 A THD curve graph provided in an embodiment of the present utility model.

[0060] Icon:

[0061] 1 - Liquid crystal display panel; 2 - Back plate; 21 - Bottom plate; 22 - Side plate; 23 - First shock pad; 201 - Hollow area; 202 - Connecting column; 3 - Exciter; 31 - Mounting bracket; 311 - Assembly groove; 312 - Second shock pad; 313 - Connecting hole; 32 - Voice coil; 331 - Magnet; 332 - Washer; 333 - Magnetic bowl; 34 - Oscillator; 35 - Elastic element; 351 - Second screw; 36 - Printed circuit board; 361 - Base; 37 - Buffer foot pad; 381 - First metal cover plate; 382 - Second metal cover plate; 4 - Buffer pad; 5 - Glue frame; 51 - Main body part; 52 - Support part; 53 - Vibration absorption layer; 6 - Shielding cover; 7 - Rear shell; 8 - Base. Detailed implementation manners

[0062] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0063] In the related art, in order to ensure the beauty of the appearance of a display device, in a television device, a pair or even three vibrators can be placed on the back panel of the television to create a stereo field. After the vibrators are powered on, they will vibrate quickly, and then drive the screen to sound together, without the need to set holes or grilles for sound emission on the device. At high volumes, the vibration is not visible to the human eye, and the screen sound does not interfere with the image, but the vibration speed of the vibrators is fast enough to produce the required sound when watching TV and movies.

[0064] However, the above-mentioned TV screen needs to use an organic electroluminescent display (OLED) because the OLED has a simple structure. The structure of a liquid crystal display (LCD) is relatively complex, including a backlight module and a liquid crystal display panel. Vibration will affect the deflection of liquid crystal molecules in the liquid crystal layer of the liquid crystal display panel. Therefore, an LCD cannot be used. However, the cost of using an OLED is much higher than that of using an LCD.

[0065] To solve the above technical problems, an embodiment of the present utility model provides a display device, as Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, including:

[0066] A liquid crystal display panel 1;

[0067] A backlight module, the backlight module is located on the light incident side of the liquid crystal display panel 1, and the backlight module includes a back plate 2;

[0068] At least one exciter 3, at least one exciter 3 is fixed on the side of the back plate 2 facing away from the liquid crystal display panel 1, and the exciter 3 is used to drive the back plate 2 to vibrate and generate sound;

[0069] A buffer mechanism, the buffer mechanism is located between the back plate 2 and the liquid crystal display panel 1.

[0070] In the display device provided by the embodiment of the present utility model, it includes a liquid crystal display panel 1, a backlight module, at least one exciter 3 and a buffer mechanism; wherein, the backlight module is located on the light incident side of the liquid crystal display panel 1, the backlight module includes a back plate 2, and the back plate 2 is used to support the liquid crystal display panel 1. The exciter 3 can be fixed on the side of the back plate 2 facing away from the liquid crystal display panel 1, and the exciter 3 is used to drive the back plate 2 to vibrate and generate sound. While the back plate 2 vibrates and generates sound, the liquid crystal display panel 1 will be driven by the back plate 2, and the sound will be transmitted through the back plate 2 to the liquid crystal display panel 1 and then to the light output side of the liquid crystal display panel. This unique sound generation method completely replaces the structure of the speaker in the prior art through the exciter 3, enabling the device not to be provided with a sound outlet hole to export the sound, ensuring the consistency and unity of the appearance of the device, making the appearance of the device more beautiful, and being able to avoid the problem of dust accumulation, and improving the waterproof performance of the device to a certain extent. In addition, since there is a buffer mechanism between the back plate 2 and the liquid crystal display panel 1, the buffer mechanism can offset most of the impact of the vibration of the back plate 2 on the liquid crystal display panel 1, making the vibration of the liquid crystal display panel 1 more slight when the back plate 2 vibrates, thereby being able to avoid the influence on the deflection of liquid crystal molecules in the liquid crystal display panel 1, not affecting the display effect of the liquid crystal display panel 1, and further being able to reduce the manufacturing cost of the display device.

[0071] In the embodiment of the present utility model, the sound emitted by the display device is emitted by the backplane 2 and the liquid crystal display panel 1. The vibration directions of the backplane 2 and the liquid crystal display panel 1 are the arrangement directions of the backplane 2 and the liquid crystal display panel 1. In this way, the sound is also emitted toward the light-emitting side of the liquid crystal display panel 1. Therefore, the sound emitted by the display device has directivity and can cover as many users on the light-emitting side of the liquid crystal display panel as possible, so that people in other areas are not disturbed. Compared with the design of emitting sound through sound holes in the prior art, the display device in this embodiment can provide users with more sound surround.

[0072] Moreover, since there is a buffer mechanism between the backplane 2 and the liquid crystal display panel 1, it can make the vibration of the liquid crystal display panel 1 more slight when the backplane 2 vibrates, so that the device can have a more plump bass effect, improve the sound quality of the device, and there is no need to worry about the deterioration of the display effect of the liquid crystal display panel 1 during low-frequency vibration. And, the manufacturing cost of the organic electroluminescent module is 70% to 100% higher than that of the liquid crystal display panel 1. In the display device of this application, using the liquid crystal display panel 1 to emit sound can greatly save the manufacturing cost.

[0073] In addition, in the prior art, the sound hole can be arranged on the display side, non-display side, or side frame of the display device, and the vibrating diaphragm of the speaker is arranged opposite to the sound hole. In the embodiment of the present utility model, since the display device emits sound through the backplane 2 and the liquid crystal display panel 1, there is no need to arrange a sound hole on the display side of the display device. Therefore, for the same size of the display device, the display device in the embodiment of the present utility model can have a larger screen-to-body ratio, providing a better viewing experience for users.

[0074] In the embodiment of the present utility model, as Figure 3 、 Figure 4 、 Figure 5 and Figure 6 shown, Figure 3 is a schematic structural diagram of a display device provided by an embodiment of the present utility model, Figure 4 is Figure 3 an enlarged view of area B in Figure 5 and Figure 6 is Figure 3 an enlarged view of area C in ; the backplane 2 may include a bottom plate 21 and side plates 22. The side plates 22 are connected to the edges of the bottom plate 21, and the side plates 22 and the bottom plate 21 enclose an accommodation space; the liquid crystal display panel 1 is located on the side of the side plates 22 away from the bottom plate 21; the exciter 3 is located on the side of the bottom plate 21 away from the liquid crystal display panel 1; the buffer mechanism may include a buffer pad 4, and the buffer pad 4 may be located in the accommodation space. The backlight module further includes a backlight assembly ( Figure 3 、 Figure 4 、 Figure 5 and Figure 6(not shown in the figure), the backlight assembly is located within the accommodation space and on the side of the buffer pad facing away from the bottom plate. The backlight assembly is used to provide a surface light source for the liquid crystal display panel. The accommodation space of the backplane 2 can provide a setting area for the buffer pad 4 to limit the position of the buffer pad 4.

[0075] Specifically, the Shore hardness of the buffer pad 4 can be 20 to 50 degrees, which can endow the buffer pad 4 with a certain elasticity to offset most of the impacts of the vibration of the backplane 2 on the liquid crystal display panel 1.

[0076] Specifically, the thickness of the buffer pad 4 in the first direction can be 1 mm to 2 mm, and the first direction is the arrangement direction of the liquid crystal display panel 1 and the backplane 2, which can ensure that the buffer pad 4 offsets most of the impacts of the vibration of the backplane 2 on the liquid crystal display panel 1.

[0077] In the above-mentioned utility model embodiment, as Figure 3 and Figure 4 shown, the cross-sectional shape of the buffer pad 4 can be wavy, which can improve the effect of offsetting the impact of the vibration of the backplane 2 on the liquid crystal display panel 1. Optionally, the cross-sectional shape of the buffer pad 4 can also be other shapes, which are not limited here and are determined according to the actual situation.

[0078] Specifically, the material of the above-mentioned buffer pad 4 can be plastic, rubber or silica gel, etc., which are not limited here and are determined according to the actual situation. For example, the material of the buffer pad 4 can be thermoplastic polyurethane elastomer rubber (soft rubber TPU). TPU has excellent elasticity and recovery performance, good resilience and wear resistance, and is not easy to deform. Therefore, it can offset most of the impacts of the backplane 2 on the liquid crystal display panel 1, making the liquid crystal display panel 1 vibrate more slightly when the backplane 2 vibrates and not affecting the display effect.

[0079] Specifically, the backlight assembly can include a lamp board, a light guide plate, a reflector and optical film materials; the light guide plate is located on the side of the buffer pad facing away from the bottom plate; the lamp board is attached to the inner side of the side plate, and the light-emitting side of the lamp board faces one side of the light guide plate; the reflector is attached to the side of the light guide plate facing the buffer pad; the optical film materials are located on the side of the light guide plate facing away from the buffer pad.

[0080] Optionally, the backlight assembly can also include a lamp board and optical film materials. The lamp board is located on the side of the buffer pad facing away from the bottom plate. The side of the lamp board facing away from the buffer pad has a plurality of light sources distributed in an array. The optical film materials are located on the side of the lamp board facing away from the buffer pad. The light sources can be miniLEDs.

[0081] Among them, the optical film materials can include a diffusion sheet, a lower prism sheet and an upper prism sheet, etc., which are sequentially stacked on the side of the light guide plate facing away from the bottom plate, and can optimize the light output of the backlight module.

[0082] In the embodiment of the present utility model, as Figure 5 and6 As shown in the figure, the display device may further include a rubber frame 5. The rubber frame 5 may include a main body portion 51 and a support portion 52. The main body portion 51 is located outside the side plate 22, and the main body portion 51 is fixedly connected to the side plate 22; the support portion 52 may be connected to the inner wall of the main body portion 51, and the support portion 52 is located on the side of the side plate 22 away from the bottom plate 21; the liquid crystal display panel 1 is located on the side of the support portion 52 away from the bottom plate 21. The support portion 52 of the rubber frame 5 can support the liquid crystal display panel 1.

[0083] Specifically, the main body portion 51 of the rubber frame 5 may be snap-connected to the side plate 22 of the back plate 2, or the main body portion 51 of the rubber frame 5 may be bonded to the side plate 22 of the back plate 2, which is not limited here and depends on the actual situation.

[0084] In the display device provided by the embodiment of the present invention, the liquid crystal display panel 1 may include an array substrate and a color filter substrate arranged in a pair, and a liquid crystal layer located between the array substrate and the color filter substrate. There are liquid crystal molecules in the liquid crystal layer. The structure of the liquid crystal display panel 1 is complex, and each component is composed of different materials. During the vibration of the exciter 3, the vibration will drive the internal components of the liquid crystal display panel 1 to vibrate, which will bring three problems:

[0085] (1) Component resonance. Because each component has its own inherent resonance frequency, when the whole machine reaches the resonance frequency point of the component, the component will resonate. Component resonance will affect the sound quality, bring additional noise, and affect the user experience. Because the structure of the liquid crystal display panel 1 is complex, it is also very difficult to solve the resonance problem caused by this.

[0086] (2) The surface fluctuation of the liquid crystal display panel affects the display effect. The vibration of the liquid crystal display panel 1 will cause fluctuations on the surface of the liquid crystal display panel, and the fluctuations will affect the viewing experience. Especially when the exciter 3 vibrates at a low frequency, the amplitude is large, which is extremely likely to cause fluctuations on the surface of the liquid crystal display panel.

[0087] (3) Vibration will also affect the lifespan of the liquid crystal display panel 1. The continuous impact of the exciter 3 on the liquid crystal display panel 1, especially when the vibration amplitude is large, is extremely likely to cause damage to the liquid crystal display panel 1, thereby affecting the service life of the whole machine. A buffer pad 4 is arranged between the liquid crystal display panel 1 and the back plate 2. When the back plate 2 vibrates, if the vibration amplitude of the liquid crystal display panel 1 is too large, the liquid crystal display panel 1 will touch the backlight assembly, and the buffer pad 4 will deform. During this process, most of the vibration will be absorbed by the buffer pad 4 and will not be transmitted to the liquid crystal display panel 1, which can avoid the occurrence of the above problems.

[0088] Specifically, the four peripheral edges of the buffer pad 4 can be fixedly connected to the bottom plate 21 of the back plate 2 through double-sided tape.

[0089] In the embodiment of the present invention, asFigure 5 As shown, the buffer mechanism may further include a vibration absorption layer 53. The vibration absorption layer 53 is located between the liquid crystal display panel 1 and the support portion 52 of the rubber frame 5. The vibration absorption layer 53 can further absorb the residual vibration, avoid the interference of the vibration between the backplane 2 and the liquid crystal display panel 1, and make the vibration of the backplane 2 tend to be synchronized with the vibration of the liquid crystal display panel 1.

[0090] Specifically, the vibration absorption layer 53 can be a double-sided foam tape, so that the liquid crystal display panel 1 is fixed on the support portion 52.

[0091] In the embodiment of the present invention, as Figure 6 shown, there may be a first shock pad 23 between the main body portion 51 of the rubber frame 5 and the side plate 22 of the backplane 2. The first shock pad 23 can prevent the interference of the vibration between the backplane 2 and the rubber frame 5, and make the vibration of the backplane 2 tend to be synchronized with the vibration of the rubber frame 5.

[0092] Specifically, the first shock pad 23 can be a shock-absorbing foam, and the shock-absorbing foam can be attached to the side plate 22 of the backplane 2.

[0093] In the embodiment of the present invention, as Figure 7 shown, Figure 7 is an exploded view of a display device provided by an embodiment of the present invention. The area of the backplane 2 opposite to the exciter 3 may have a hollowed-out area 201. When the exciter 3 vibrates, the hollowed-out area 201 on the backplane 2 can prevent the backplane 2 from interfering with the vibration of the exciter 3. Optionally, the area of the backplane 2 opposite to the exciter 3 may also not be provided with the hollowed-out area 201, and only the vibration amplitude of the exciter 3 needs to be reasonably set.

[0094] In the embodiment of the present invention, as Figure 7 shown, the display device further includes a base 8, a rear case 7, a main control module, and a shielding cover 6; wherein, the main control module is located on the side of the backplane 2 facing away from the liquid crystal display panel 1, the main control module is fixed on the backplane 2, the main control module can be signal-connected to the liquid crystal display panel 1 and the exciter 3, the main control module is used to provide a display driving signal for the liquid crystal display panel 1, and is used to provide a driving signal for the exciter 3 to generate sound; the shielding cover 6 can cover the outside of the main control module; the rear case 7 is located on the side of the exciter 3 and the shielding cover 6 facing away from the backplane 2, and the edge of the rear case 7 can be connected to the edge of the rubber frame 5; the base 8 can be connected to the side of the rear case 7 facing away from the shielding cover 6.

[0095] In the embodiment of the present invention, as Figure 8 and Figure 9 shown, Figure 8 is an exploded view of an exciter provided by an embodiment of the present invention; Figure 9 is Figure 3Enlarged view of the middle region D. Specifically, the actuator 3 may include a mounting bracket 31, a voice coil 32, a vibrator 34, and an elastic element 35. The mounting bracket 31 has an assembly groove 311 facing the back plate 2. The voice coil 32 is fixed in the assembly groove 311, and the center line of the voice coil 32 extends along the first direction. The vibrator 34 is located in the assembly groove 311 and on the side of the voice coil 32 close to the back plate 2. The voice coil 32 can drive the vibrator 34 to vibrate. The elastic element 35 is connected to the mounting bracket 31. The vibrator can drive the elastic element 35 to vibrate, the elastic element 35 can drive the mounting bracket 31 to vibrate, and the mounting bracket 31 can drive the back plate 2 to vibrate.

[0096] Specifically, in the above-mentioned actuator 3, a printed circuit board 36 is further included. The printed circuit board 36 can receive the driving signal for sound production provided by the main control module. The printed circuit board 36 can provide an alternating current signal for sound production to the voice coil 32. When the voice coil 32 is energized, the voice coil 32 can drive the vibrator 34 to vibrate. The vibration of the vibrator 34 can be transmitted to the elastic element 35, and the elastic element 35 can cause the mounting bracket 31 to vibrate. Further, the mounting bracket 31 can drive the back plate 2 to vibrate, and finally drive the entire back plate 2 to vibrate and produce sound.

[0097] Specifically, the mounting bracket 31 can be a plastic bracket, which has a simple structure and is easy to manufacture.

[0098] Specifically, the actuator 3 further includes a base 361. The base 361 is connected to the printed circuit board 36, and the main control module is signal-connected to the printed circuit board 36 through the base 361.

[0099] In the embodiment of the present utility model, as Figure 8 and Figure 9 shown, the actuator 3 may further include a second shock pad 312. The second shock pad 312 is located on the side of the mounting bracket 31 facing the back plate 2. The second shock pad 312 can contact the back plate 2, which can prevent interference between the mounting bracket 31 and the back plate 2 when the mounting bracket 31 vibrates, and make the vibration of the mounting bracket 31 tend to be synchronized with the vibration of the back plate 2.

[0100] Specifically, the second shock pad 312 can be a shock-absorbing foam, and the second shock pad 312 can be attached to the edge of the mounting bracket 31.

[0101] Specifically, as Figure 8 shown, both ends of the mounting bracket 31 may have at least one connection hole 313 facing the back plate 2. Among them, as Figure 7As shown in the figure, on the side of the back plate 2 facing the actuator 3, there are connection posts 202 corresponding to the connection holes 313. The connection posts 202 may have threaded holes corresponding to the connection holes 313. The actuator 3 may further include buffer feet pads 37 and first screws corresponding one by one to the connection holes 313. The buffer feet pads 37 may be sleeved on the connection posts 202, and the screw rod of the first screw passes through the connection hole 313 and is threadedly connected to the threaded hole on the connection post 202, which can fixedly connect the mounting bracket 31 to the back plate 2.

[0102] The mounting bracket 31 of the above actuator 3 can be screw - connected to the back plate 2 through the first screw. The buffer feet pads 37 sleeved on the connection posts 202 of the back plate 2 can buffer the interference between the connection points of the mounting bracket 31 and the back plate 2, making the vibration of the mounting bracket 31 tend to be synchronous with the vibration of the back plate 2.

[0103] Specifically, as Figure 8 shown, each end of the mounting bracket 31 may have two connection holes 313, and the first screw passes through the connection holes 313 and can be threadedly connected to the connection posts 202 on the back plate 2.

[0104] In the embodiment of the present utility model, as Figure 8 and Figure 9 shown, the actuator 3 further includes a magnetic circuit assembly. The magnetic circuit assembly may include a magnet 331, a washer 332, and a magnetic bowl 333 connected to each other. Among them, the magnet 331 is located inside the voice coil 32, and there is a first gap between the magnet 331 and the voice coil 32. The washer 332 is located on the side of the magnet 331 close to the vibrator 34. The magnetic bowl 333 is located between the washer 332 and the vibrator 34. The side of the magnetic bowl 333 facing the vibrator 34 is fixedly connected to the vibrator 34. The side of the magnetic bowl 333 facing the washer 332 has a groove. The voice coil 32, the magnet 331, and the washer 332 are located in the groove. There is a second gap between the outer wall of the voice coil 32 and the inner wall of the magnetic bowl 333. The elastic element 35 is sleeved on the outside of the magnetic bowl 333.

[0105] In the above actuator 3, the alternating current signal for generating sound is introduced into the voice coil 32 through the printed circuit board 36. After the voice coil 32 is energized, a magnetic field is generated, and the north and south poles of the magnetic field alternate, causing the magnet 331, the washer 332, the magnetic bowl 333, and the vibrator 34 to perform reciprocating motion in the first direction. The vibration of the vibrator 34 is transmitted to the elastic element 35, and then causes the vibration of the mounting bracket 31. Finally, the vibration of the mounting bracket 31 drives the entire back plate 2 to vibrate and generate sound.

[0106] Specifically, as Figure 9 shown, the above magnetic bowl 333, vibrator 34, elastic element 35, washer 332, and magnet 331 can be glued together as a whole.

[0107] Specifically, as Figure 8 andFigure 9 As shown, the middle region of the elastic element 35 can be sleeved on one end of the magnetic conductive bowl 333 adjacent to the voice coil 32, and both ends of the elastic element 35 can be connected to the inner wall of the assembly groove 311 of the mounting bracket 31 through the second screw 351, so as to realize the fixed connection between the elastic element 35 and the mounting bracket 31.

[0108] Specifically, the actuator 3 further includes a first metal cover plate 381 and a second metal cover plate 382. The first metal cover plate 381 can be bonded to the second metal cover plate 382 with glue, and the second metal cover plate 382 can be bonded to the mounting bracket 31 with glue. The first metal cover plate 381 and the second metal cover plate 382 can increase the strength of the mounting bracket 31, and the first metal cover plate 381 and the second metal cover plate 382 can avoid sound phase cancellation.

[0109] In the embodiment of the present utility model, as Figure 10 shown, Figure 10 is the external dimension diagram of each component assembled in the actuator 3 in the embodiment of the present utility model. After the actuator 3 is assembled, its length L1 can be 104 mm, its width W1 can be 40 mm, and its thickness H1 can be 11 mm; as Figure 11 shown, Figure 11 is the external dimension diagram of a speaker in the prior art. Among the speakers with acoustic performance close to that of the actuator 3 in this embodiment, its length L2 can be 45 mm, its width W2 can be 39 mm, and its thickness H2 can be 20 mm.

[0110] In the embodiment of the present utility model, when the actuator 3 is assembled into the display device, the thickness direction of the display device is the same as the thickness of the actuator 3, that is, after the actuator 3 is assembled, the increased thickness of the display device is H1; in the prior art, when the speaker is assembled into the display device and emits sound through the sound outlet hole on the housing, the thickness direction of the display device can be the same as the width direction or the thickness direction of the speaker, that is, after the speaker is assembled, the display device can emit sound from the front, the side or the back, and the increased thickness of the display device can be W2 or H2. And both W2 and H2 are greater than H1. Therefore, the display device in the embodiment of the present utility model helps to greatly reduce the thickness of the whole machine and improve the aesthetics of the whole machine.

[0111] In the embodiment of the present utility model, as Figure 7 shown, Figure 7 is the exploded view of a display device provided in the embodiment of the present utility model. For this display device, the inventors of the present application have conducted tests. As Figure 12 and Figure 13 shown, Figure 12 is the SPL curve diagram of a whole display device provided in the embodiment of the present utility model, Figure 13The THD curve graph of an entire display device provided by an embodiment of the present utility model. It can be seen from Figure 12 the SPL curve shown in that the SPL curve of the entire machine test is relatively flat, and the acoustic performance of the display device provided by the embodiment of the present utility model is good; it can be seen from Figure 13 the THD curve shown in that the total harmonic distortion of the THD curve is 5%-10% above 100HZ, and the total harmonic distortion is less than 5% between 300HZ and 2KHZ, and the acoustic performance is better than that of a conventional speaker.

[0112] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. A display device, characterized in that: include: Liquid crystal display panel; A backlight module, the backlight module is located at the light incident side of the liquid crystal display panel, and the backlight module includes a back plate; At least one exciter, the at least one exciter is fixed to a side of the back plate away from the liquid crystal display panel, the exciter is used to drive the back plate to vibrate and generate sound; A buffer mechanism is located between the back plate and the liquid crystal display panel.

2. The display device according to claim 1, characterized in that The back plate includes a bottom plate and a side plate, wherein the side plate is connected to the edge of the bottom plate, and the side plate and the bottom plate enclose a receiving space; The liquid crystal display panel is located on a side of the side plate away from the bottom plate; The actuator is located on a side of the bottom plate away from the liquid crystal display panel; The buffer mechanism comprises a buffer pad, and the buffer pad is located in the accommodating space; The backlight module also includes a backlight assembly, which is located in the accommodating space and on a side of the buffer pad away from the bottom plate. The backlight assembly is used to provide a surface light source for the liquid crystal display panel.

3. The display device according to claim 2, characterized in that: The Shore hardness of the buffer pad is 20 to 50 degrees.

4. The display device according to claim 3, characterized in that The thickness of the buffer pad along a first direction is 1 mm to 2 mm, and the first direction is an arrangement direction of the liquid crystal display panel and the back plate.

5. The display device according to claim 2, characterized in that: The backlight assembly includes a lamp board, a light guide plate, a reflective sheet and an optical film material; The light guide plate is located on a side of the buffer pad away from the bottom plate; The light board is attached to the inner side of the side board, and the light emitting side of the light board is opposite to a side surface of the light guide plate; The reflective sheet is attached to a side of the light guide plate facing the buffer pad; The optical film material is located at a side of the light guide plate away from the buffer pad.

6. The display device according to claim 2, characterized in that: It also includes a rubber frame, the rubber frame includes a main body and a support part, the main body is located outside the side plate, and the main body is fixedly connected to the side plate; The support portion is connected to the main body portion, and the support portion is located on a side of the side plate away from the bottom plate; The liquid crystal display panel is located on a side of the support portion away from the bottom plate.

7. The display device according to claim 6, characterized in that: The buffer mechanism further includes a vibration absorbing layer, and the vibration absorbing layer is located between the liquid crystal display panel and the supporting part.

8. The display device according to claim 7, characterized in that: The vibration absorbing layer is a foam double-sided adhesive.

9. The display device according to claim 8, characterized in that: Also included is a first shock-absorbing pad, which is located between the main body and the side plate.

10. The display device according to claim 9, characterized in that: The first shock-absorbing pad is a shock-absorbing foam, and the shock-absorbing foam is attached to the side plate.

11. The display device according to claim 1, characterized in that: The back plate has a hollow area in an area opposite to the exciter.

12. The display device according to any one of claims 1 to 11, characterized in that: The exciter comprises a mounting bracket, a voice coil, a vibrator and an elastic element; The mounting bracket has an assembly groove facing one side of the back plate; The voice coil is fixed in the assembly groove, and the center line of the voice coil extends along a first direction; The vibrator is located in the assembly groove and on a side of the voice coil adjacent to the back plate, and the voice coil is used to drive the vibrator to vibrate; The elastic element is connected to the mounting bracket, and the vibrator is used to drive the elastic element to vibrate.

13. The display device according to claim 12, characterized in that: The exciter further includes a second shock absorbing pad, which is located on a side of the mounting bracket facing the back plate.

14. The display device according to claim 13, characterized in that: Both ends of the mounting bracket have at least one connection hole facing the back plate; The back plate has a connecting column corresponding to the connecting hole on one side facing the exciter, and the connecting column has a threaded hole opposite to the connecting hole; The exciter also includes a buffer pad and a first screw corresponding to the connecting holes one by one, the buffer pad is sleeved on the connecting column, and the screw rod of the first screw passes through the connecting hole and is threadedly connected to the threaded hole on the connecting column to fix the mounting bracket to the back plate.

15. The display device according to claim 12, characterized in that: The exciter further comprises a magnetic circuit assembly, wherein the magnetic circuit assembly comprises a magnet, a washer and a magnetic bowl connected to each other; The magnet is located in the voice coil, and a first gap is formed between the magnet and the voice coil; The washer is located on a side of the magnet adjacent to the vibrator; The magnetic bowl is located between the washer and the vibrator, the side of the magnetic bowl facing the vibrator is fixedly connected to the vibrator, and the side of the magnetic bowl facing the washer has a groove; The voice coil, the magnet and the washer are located in the groove, and a second gap is provided between the outer wall of the voice coil and the inner wall of the magnetic bowl; The elastic element is sleeved on the outer side of the magnetic bowl.

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