Dustproof box, backlight module and display device

Abstract

The present application relates to a dustproof box, a backlight module, and a display device. The dustproof box is used to cooperate with the air inlet of the backplate. The dustproof box includes: a box body, a partition, and a dust collection arm. The box body is buckled on the air inlet, and the bottom of the box body is provided with an opening connected to the outside air; the partition is provided in the box body, dividing the interior of the box body into a dust collection chamber and an air inlet chamber along the height direction of the dustproof box; the dust collection chamber is below the partition, and the air inlet chamber is connected to the air inlet, and the partition is provided with a ventilation hole to connect the dust collection chamber and the air inlet chamber; the dust collection arm is provided in the dust collection chamber, and its length direction is perpendicular to the direction of the opening. The dust collection arm is provided with a plurality of dust collection blades, each dust collection blade is spaced along the length direction of the dust collection arm, and a ventilation channel is formed between two adjacent dust collection blades. The dust collection blades are tilted to form an angle with the direction of the opening. The dustproof box can effectively prevent dust from the outdoor environment from entering the module light cavity through the module air inlet channel, thereby affecting the outdoor service life of the module.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a dustproof box, a backlight module and a display device. Background Art

[0002] In recent years, with the development and maturity of Mini LED (Mini Light-Emitting Diode) and its related technologies, Mini LED displays have become increasingly widely used and gradually entered people's daily lives, becoming a common display application technology. The use of Mini LED display modules has obvious advantages in high brightness, high color gamut, and high contrast. It is particularly suitable for public places with strong outdoor light, such as outdoor display screens in shopping malls, square display screens, bus station display screens, etc., which can provide people with a clear outdoor display. Despite the above broad outdoor application needs, Mini LED modules use a large number of LEDs and generate a lot of heat. The modules must solve the heat dissipation problem, and it is inevitable to design heat dissipation ventilation ducts on the modules. However, the outdoor environment is full of dust, which can easily enter the module optical cavity through the module air inlet duct, seriously affecting the outdoor service life of the module. Summary of the Invention

[0003] The present application provides a dustproof box, a backlight module and a display device to solve the problem of dust from the outdoor environment entering the module optical cavity and affecting the outdoor service life of the module.

[0004] In a first aspect, the present application provides a dustproof box for cooperating with an air inlet of a back plate, the dustproof box comprising:

[0005] The box body is buckled on the air inlet, and the bottom of the box body is provided with an opening communicating with the outside air;

[0006] a partition disposed in the box body and dividing the interior of the box body into a dust storage chamber and an air inlet chamber along the height direction of the dustproof box, the dust storage chamber being below the partition, the air inlet chamber being connected to the air inlet hole, and a ventilation hole being provided on the partition to connect the dust storage chamber and the air inlet chamber; and

[0007] The dust collection arm is arranged in the dust collection chamber, and its length direction is perpendicular to the opening direction of the opening. A plurality of dust collection blades are provided on the dust collection arm, and each of the dust collection blades is arranged at intervals along the length direction of the dust collection arm. A ventilation channel is formed between two adjacent dust collection blades, and the dust collection blades are arranged at an angle to form an angle with the opening direction of the opening.

[0008] In a possible implementation, a plurality of concave portions are formed on the windward surface of the dust collecting blade.

[0009] In a possible implementation, the dust collecting blades are evenly spaced apart on the dust collecting arm, and the inclination direction and angle of the dust collecting blades are the same.

[0010] In a possible implementation, the dust collecting arm includes an upper arm and a lower arm spaced apart along the opening direction of the opening, the upper arm is arranged above the lower arm, and a plurality of the dust collecting blades are provided on both the upper arm and the lower arm.

[0011] In one possible implementation, the inclination direction of the dust collecting blades located on the upper arm is the same, the inclination direction of the dust collecting blades located on the lower arm is the same, and the inclination direction of the dust collecting blades located on the upper arm is opposite to the inclination direction of the dust collecting blades located on the lower arm.

[0012] In a possible implementation, the dust collecting blades on the upper arm and the dust collecting blades on the lower arm are staggered in the length direction of the dust collecting arm.

[0013] In a possible implementation, it also includes a baffle arranged in the box body, the baffle divides the interior of the box body into a first cavity and a second cavity along the axial direction of the air inlet hole, the partition and the opening are both arranged on the second cavity, the first cavity is connected to the air inlet hole, and at least one air hole is provided on the baffle to connect the first cavity and the second cavity.

[0014] In a second aspect, the present application provides a backlight module, comprising:

[0015] A back panel, wherein the back panel is provided with an air inlet and an air outlet that are connected to each other; and

[0016] As described in the first aspect, the dustproof box cooperates with the air inlet hole.

[0017] In a third aspect, the present application provides a display device, comprising the backlight module according to the second aspect, wherein the dust collection arm is an elastic arm, the dust collection arm comprises a connecting arm disposed in the dust collection cavity, the dust collection fan blade is disposed on the connecting arm, and both ends of the connecting arm protrude from the box body and are connected to a vibration arm;

[0018] Two speakers are arranged on the back panel. The two speakers correspond to the two vibration arms respectively, and the sound-emitting ends of the speakers are arranged toward the corresponding vibration arms.

[0019] In a possible implementation, the vibration arm includes a base connected to the connecting arm, and a plurality of vibration-absorbing blades are arranged on the base at intervals along the sound output direction of the speaker, and each of the vibration-absorbing blades is arranged in a stepped shape.

[0020] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0021] The dustproof box provided in this embodiment connects outdoor air and the dust chamber of the box body through an opening, connects the dust chamber and the air inlet chamber through a vent, and connects the air inlet chamber of the box body and the back plate through an air inlet, so that outdoor air can enter the back plate through the opening, the vent, and the air inlet in sequence, thereby ventilating and cooling the optical components inside the back plate. By arranging dust collecting blades in the dust chamber, and the dust collecting blades are tilted so that the dust collecting blades have a windward surface facing the opening, the outside air entering the box body through the opening will flow to the windward surface of the dust collecting blades, and the dust collecting blades will have a certain adsorption effect on the dust in the outside air. The air after dust adsorption is circulated through the ventilation channel between two adjacent dust collecting blades, so that the dust collection box can not only reduce the dust from entering the back plate, but also ensure that the air can stably enter the back plate through the air inlet, thereby improving the service life of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0025] Figure 1 A schematic diagram of the overall structure of a dustproof box provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Exploded diagram (I);

[0027] Figure 3 for Figure 1 Exploded view (II);

[0028] Figure 4 for Figure 2 Schematic diagram of the structure of the middle shell (—);

[0029] Figure 5 for Figure 2 Schematic diagram of the structure of the middle shell (II);

[0030] Figure 6 A rear view of a housing in a dustproof box provided in an embodiment of the present application;

[0031] Figure 7 for Figure 6 Axonometric diagram of

[0032] Figure 8 This is a schematic axial view of a housing in a dustproof box provided in an embodiment of the present application;

[0033] Figure 9 This is an axial schematic diagram of a dust collection arm in a dustproof box provided in an embodiment of the present application;

[0034] Figure 10 for Figure 9 A magnified view of part A;

[0035] Figure 11 A cross-sectional schematic diagram of the cooperation between a dustproof box and a back plate provided in an embodiment of the present application;

[0036] Figure 12 Schematic diagram of the structure of the backplane;

[0037] Figure 13 A schematic structural diagram of a backlight module provided in an embodiment of the present application;

[0038] Figure 14 for Figure 13 Exploded diagram;

[0039] Figure 15 A schematic structural diagram of a display device provided in an embodiment of the present application;

[0040] Figure 16 for Figure 15 Enlarged view of part B.

[0041] Description of reference numerals:

[0042] 10. Dust box;

[0043] 1. Box body; 11. Shell; 12. Upper cover; 13. Opening; 14. Dust chamber; 15. Air inlet chamber; 16. First chamber; 17. Second chamber;

[0044] 2. Partition; 21. Ventilation hole;

[0045] 3. Dust collecting arm; 31. Dust collecting blade; 311. Inner recess; 32. Upper arm; 33. Lower arm; 34. Vibration arm; 341. Base; 342. Vibration absorbing blade;

[0046] 4. Baffle; 41. Air hole; 42. Partition plate; 43. Rib

[0047] 5. Mounting plate; 51. Mounting position;

[0048] 7. Mouth glue; 8. Speaker;

[0049] 20. Back panel; 201. Air inlet; 202. Air outlet. DETAILED DESCRIPTION

[0050] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0052] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0053] To address the existing problem of outdoor backlight modules being equipped with heat dissipation and ventilation ducts to ensure heat dissipation of internal optical components, etc., the outdoor environment is high in dust, which can easily enter the backlight module through the heat dissipation and ventilation ducts, seriously affecting the outdoor service life of the backlight module. The present application provides a dustproof box that can ensure that airflow enters the back panel to dissipate heat for optical components, etc., and can also absorb and collect dust in the outdoor air, thereby reducing dust from entering the interior of the backlight module, ensuring the safety of the optical components inside the backlight module, and extending the service life of the backlight module.

[0054] First embodiment

[0055] Reference Figures 1-9 The embodiment of the present application provides a dustproof box 10, which is used to cooperate with the air inlet 201 of the back plate 20, and the dustproof box 10 includes:

[0056] The box body 1 is buckled on the air inlet 201, and the bottom of the box body 1 is provided with an opening 13 communicating with the outside air;

[0057] A partition 2 is provided in the box body 1 and divides the interior of the box body 1 into a dust storage chamber 14 and an air inlet chamber 15 along the height direction of the dustproof box 10. The dust storage chamber 14 is located below the partition 2, and the air inlet chamber 15 is connected to the air inlet hole 201. A ventilation hole 21 is provided on the partition 2 to connect the dust storage chamber 14 and the air inlet chamber 15; and

[0058] The dust collecting arm 3 is arranged in the dust collecting chamber 14, and its length direction is perpendicular to the opening direction of the opening 13. A plurality of dust collecting blades 31 are provided on the dust collecting arm 3, and each of the dust collecting blades 31 is arranged at intervals along the length direction of the dust collecting arm 3. A ventilation channel is formed between two adjacent dust collecting blades 31, and the dust collecting blades 31 are arranged at an angle to form an angle with the opening direction of the opening 13.

[0059] The dustproof box 10 provided in the present application connects the outdoor air and the dust storage chamber 14 of the box body 1 through the opening 13, connects the dust storage chamber 14 and the air inlet chamber 15 through the ventilation hole 21, and connects the air inlet chamber 15 of the box body 1 and the back panel 20 through the air inlet hole 201, so that the outdoor air can enter the back panel 20 through the opening 13, the ventilation hole 21 and the air inlet hole 201 in sequence, thereby playing a role in ventilation and heat dissipation for the optical components inside the back panel 20. By arranging dust collecting blades 31 in the dust collecting chamber 14 and arranging the dust collecting blades 31 at an angle, the dust collecting blades 31 have a windward surface facing the opening 13, so that the outside air entering the box body 1 through the opening 13 will flow to the windward surface of the dust collecting blades 31, and the dust collecting blades 31 will have a certain adsorption effect on the dust in the outside air. The air after dust adsorption will circulate through the ventilation channel between the two adjacent dust collecting blades 31, so that the dust collection box can not only reduce the dust entering the back panel 20, but also ensure that the air stably enters the back panel 20 through the air inlet hole 201, thereby improving the service life of the backlight module.

[0060] Reference Figure 1 、 Figure 2 ,、 Figure 12 and Figure 14 The box body 1 includes a shell 11 and an upper cover 12. The shell 11 is provided with a first opening, a second opening, and the aforementioned opening 13. The first opening and the second opening are located on opposite sides of the shell 11. The first opening is used to connect the interior of the shell 11 with the air inlet 201 of the back panel 20. The upper cover 12 is provided to cover the second opening to seal the second opening. The opening 13 on the shell 11 is used to connect the interior of the shell 11 with the outside air. The box body 1 is buckled onto the air inlet 201 of the back panel 20, that is, the first opening is buckled onto the air inlet 201 of the back panel 20. To ensure a sealed connection between the first opening and the back panel 20, a sealant may be provided between the first opening and the back panel 20, thereby effectively preventing the outside environment from communicating with the air inlet 201 through the gap between the first opening and the back panel 20. In this application, the first opening and the back panel 20 are bonded together using a rubber seal 7 to achieve a sealed connection between the shell 11 and the back panel 20.

[0061] Combine Figure 3, by providing a second opening on the shell 11, it is convenient to assemble the partition 2 and the dust collecting arm 3 inside the box body 1. After the partition 2 and the dust collecting arm 3 are installed, the second opening is covered by the upper cover 12 to ensure that when the dustproof box 10 is in operation, the outside air enters the box body 1 through the opening 13 of the box body 1, so as to achieve the maximum adsorption effect of the dust collecting arm 3 on the dust in the outside air. Of course, in order to prevent the outside air from entering the box body 1 through the gap between the upper cover 12 and the second opening, a seal is provided between the upper cover 12 and the second opening to seal the dustproof box 10. In this application, the second opening and the upper cover 12 are bonded together by a mouth-shaped glue 7 to ensure the overall sealing effect of the dustproof box 10.

[0062] The opening 13 is opened at the bottom of the box body 1, so that the outside air flows to the dust collecting arm 3 in a direction of movement from bottom to top, so the windward side of the dust collecting arm 3 is the side of the dust collecting arm 3 facing the bottom. The windward side of the dust collecting arm 3 is mainly used to contact with the outside air to absorb dust and dust in the outside air, so that dust or dust is adsorbed on the side of the dust collecting arm 3 facing the bottom. When the dust or dust on the dust collecting arm 3 is adsorbed to a certain extent, the dust or dust will fall due to its own gravity, and can be directly discharged from the box body 1 through the opening 13, which is convenient for the dust removal effect of the dustproof box 10.

[0063] Reference Figure 3 、 Figure 8 and Figure 9 The dust collecting blades 31 are evenly spaced in the length direction of the dust collecting arm 3, and the inclination direction and angle of each dust collecting blade 31 are the same, and a ventilation channel is formed between two adjacent dust collecting blades 31. By arranging multiple dust collecting blades 31 evenly and the inclination direction and angle of each dust collecting blade 31 are the same, the shapes of multiple ventilation channels are consistent, thereby ensuring the stability of air circulation in the dustproof box 10, so as to ensure the heat dissipation effect of the optical components in the back panel 20.

[0064] Combine Figure 10 Of course, in actual use, the inclination direction of each dust accumulation blade 31 can be exactly the same, partly the same or completely different. In addition, the angle of each dust accumulation blade 31 can also be exactly the same, partly the same or completely different.

[0065] To ensure the dust collection effect of the dust collecting arm 3, the top end of one dust collecting blade 31 is arranged adjacent to the bottom end of the other dust collecting blade 31 between two adjacent dust collecting blades 31, and the two dust collecting blades 31 are spliced ​​together to form an integral shape based on the orthographic projection of the opening 13. That is, in the direction of the opening 13, the top end of one dust collecting blade 31 covers the bottom end of the other dust collecting blade 31, so that the air flowing through the ventilation channel will fully contact the windward surface of one dust collecting blade 31 and be guided by the windward surface of the dust collecting blade 31.

[0066] The windward surface of the dust collecting blade 31 is formed with a plurality of inner recesses 311, which are provided so that the windward surface of the dust collecting blade 31 is an uneven plane. Since the greater the surface roughness, the stronger the adsorption force on dust or dust, the inner recesses 311 can enhance the adsorption effect. Optionally, a plurality of inner recesses 311 are evenly spaced on the dust collecting blade 31. Of course, the orthographic projection shape of the inner recess 311 can be circular, rectangular, triangular or other polygonal shapes. Exemplarily, in the present application, the orthographic projection shape of the inner recess 311 is circular, and the inner recess 311 provided in a circular shape can be opened as many as possible on the windward surface of the dust collecting blade 31, and the center spacing between adjacent inner recesses 311 is between 2 mm and 5 mm.

[0067] Reference Figure 3-Figure 5 The side walls of the box body 1 corresponding to the bottom are each provided with the aforementioned openings 13 to ensure the air intake of the box body 1. To ensure the dust collection effect, the two ends of the dust collection arm 3 are respectively connected to the opposite side walls of the box body 1. Multiple mounting plates 5 are arranged inside the box body 1 at intervals along the length of the dust collection arm 3. The mounting plates 5 are provided with mounting positions 51 for mating with the dust collection arm 3. The mounting positions 51 can be a hole-like structure or a groove structure to match the dust collection arm 3. The multiple mounting positions 51 enhance the positional stability of the dust collection arm 3 within the box body 1.

[0068] Reference Figure 2 In order to ensure the air intake, a plurality of ventilation holes 21 are opened on the partition plate 2 along the length direction of the dust collecting arm 3, and the dust collecting chamber 14 and the air inlet chamber 15 are connected through the plurality of ventilation holes 21. Optionally, the plurality of ventilation holes 21 are arranged in a one-to-one correspondence with the plurality of ventilation channels.

[0069] Reference Figures 8-10, the dust collecting arm 3 includes an upper arm 32 and a lower arm 33 spaced apart along the opening direction of the opening 13, the upper arm 32 is arranged above the lower arm 33, and a plurality of dust collecting blades 31 are provided on both the upper arm 32 and the lower arm 33. By arranging the upper arm 32 and the lower arm 33 spaced apart in the opening direction of the opening 13, the outside air can pass through the dust collecting blades 31 on the lower arm 33 for secondary dust collection after dust is collected, thereby further improving the dust collection effect. Of course, the dust collecting arm 3 can also be provided with multiple arms along the opening direction of the opening 13, and the multiple arms can include an upper arm 32, multiple middle arms and a lower arm 33, and the dust collection effect can be improved by multi-stage dust collection of the multiple arms. As an example, this application only describes the dust collecting arm 3 as having two arms, and they are the upper arm 32 and the lower arm 33 respectively. It can be known that when the arm is provided as multiple, its setting structure and principle are the same or similar to when it is provided as two.

[0070] The inclination directions of the dust collecting blades 31 on the upper arm 32 are the same, the inclination directions of the dust collecting blades 31 on the lower arm 33 are the same, and the inclination directions of the dust collecting blades 31 on the upper arm 32 are opposite to the inclination directions of the dust collecting blades 31 on the lower arm 33; by setting the inclination directions of the multiple dust collecting blades 31 on the upper arm 32 to be the same, the processing, preparation and installation of the dust collecting blades 31 on the upper arm 32 are facilitated, and by setting the inclination directions of the multiple dust collecting blades 31 on the lower arm 33 to be the same, the processing, preparation and installation of the dust collecting blades 31 on the lower arm 33 are facilitated. By setting the inclination directions of the dust collecting blades 31 on the upper arm 32 to be opposite to the inclination directions of the dust collecting blades 31 on the lower arm 33, the air passing through the dust collecting blades 31 can be guided twice to increase the contact area between the air and the dust collecting blades 31, thereby improving the dust adsorption force.

[0071] The dust collecting blades 31 located on the upper arm 32 and the dust collecting blades 31 located on the lower arm 33 are staggered in the length direction of the dust collecting arm 3. By staggering the multiple dust collecting blades 31 on the dust collecting arm 3 up and down in the length direction of the dust collecting arm 3, the air outlet end of the ventilation channel located on the lower arm 33 corresponds to the dust collecting blades 31 located on the upper arm 32, thereby adsorbing the dust in the air to the greatest extent.

[0072] Optionally, the angle of the dust collecting blades 31 on the upper arm 32 is the same as the angle of the dust collecting blades 31 on the lower arm 33, both being 45 degrees. The 45-degree tilt of the dust collecting blades 31 ensures a large contact area with the air and an adsorption effect on dust and the like in the air, while also ensuring a good air flow and a stable air flow rate in the ventilation duct.

[0073] Reference Figure 4-Figure 7 as well as Figure 12 The dustproof box 10 further includes a baffle 4 disposed within the box body 1. The baffle 4 divides the interior of the box body 1 into a first cavity 16 and a second cavity 17 along the axis of the air inlet hole 201. The partition 2 and the opening 13 are both disposed on the second cavity 17. The first cavity 16 communicates with the air inlet hole 201. The baffle 4 is provided with at least one air passage 41 for connecting the first cavity 16 and the second cavity 17. The baffle 4 divides the interior of the box body 1 into the first cavity 16 and the second cavity 17. The first cavity 16 communicates with the air inlet hole 201 of the back panel 20 through the first cavity 16. The large cross-sectional area of ​​the first cavity 16 does not restrict the installation position of the box body 1 on the back panel 20. Even when the air inlet hole 201 is provided at the edge of the back panel 20, the box body 1 can be installed in the installation position of the back panel 20. The dustproof box 10 can also be ensured not to protrude from the edge of the back panel 20, thereby ensuring the compactness and miniaturization of the overall structure of the backlight module. By providing a plurality of air holes 41 , the air intake volume is increased, thereby ensuring the heat dissipation effect.

[0074] Second embodiment

[0075] Reference Figure 12 and Figure 13 The embodiment of the present application further provides a backlight module, which includes a back panel 20 and the dustproof box 10 described in the aforementioned embodiment. The back panel 20 is provided with an air inlet 201 and an air outlet 202 that are connected to each other. The technical features of the dustproof box 10 can be referred to the above description and will not be repeated here. Since the backlight module disclosed in the embodiment of the present application includes the dustproof box 10 provided in the aforementioned embodiment, the backlight module having the dustproof box 10 also has all the above-mentioned technical effects, which will not be repeated here.

[0076] Combine Figure 5 、 Figure 6 and Figure 14 Multiple air inlet holes 201 are evenly spaced on the back panel 20. In any air inlet direction, the ventilation channel, the ventilation holes 21, and the corresponding air holes 41 connect to form a heat dissipation channel. Multiple heat dissipation channels are provided, and each of these channels corresponds to the multiple air inlet holes 201 to ensure uniform air supply. Multiple air holes 41 can be provided within the same heat dissipation channel to increase ventilation.

[0077] Combine Figure 10Correspondingly, a plurality of partition plates 42 are arranged at intervals on the baffle 4, and the partition plates 42 are arranged in the first cavity 16. The plurality of partition plates 42 are arranged at intervals along the setting direction of the plurality of air inlet holes 201, and a channel is formed between two adjacent partition plates 42. The channel is connected to the air holes 41 to ensure that the air in the heat dissipation channel can flow stably into the corresponding air inlet holes 201. A plurality of ribs are arranged at intervals in the air duct not connected to the air holes 41, and the connection strength is improved by the plurality of ribs.

[0078] Third embodiment

[0079] Reference Figure 2 、 Figure 15 and Figure 16 , the embodiment of the present application also provides a display device, which includes the backlight module described in the above embodiment, the dust-collecting arm 3 is an elastic arm, and the elastic arm can be made of materials such as plastic or rubber. The dust-collecting arm 3 includes a connecting arm arranged in the dust-collecting cavity 14, and the dust-collecting blade 31 is arranged on the connecting arm. The two ends of the connecting arm protrude from the box body 1 and are both connected to a vibration arm 34; two speakers 8 are provided on the back plate 20, and the two speakers 8 correspond to the two vibration arms 34 respectively, and the sound-raising ends of the speakers 8 are arranged toward the corresponding vibration arms 34. Since the dust-collecting arm 3 is an elastic arm, the sound produced by the sound-raising end of the speaker 8 vibrates the dust-collecting arm 3, and the dust-collecting arm 3 absorbs the vibration of the speaker 8, so that it itself will generate corresponding vibration. The dust-collecting blade 31 on the dust-collecting arm 3 is driven to vibrate by the vibration of the dust-collecting arm 3 itself, and the dust or dust on the dust-collecting blade 31 will fall downward after the vibration, thereby achieving the self-cleaning effect of the dust-collecting blade 31.

[0080] The vibration arm 34 includes a base 341 connected to the connecting arm, and a plurality of vibration-absorbing blades 342 are arranged on the base 341 at intervals along the sound-emitting direction of the speaker 8, and each of the vibration-absorbing blades 342 is arranged in a stepped manner. The stepped structure is arranged to uniformly absorb the vibration of the speaker 8, thereby improving the absorption effect of the vibration arm 34 on the vibration of the speaker 8, and thus improving the self-cleaning effect of the dust-accumulating blades 31. Optionally, each of the vibration-absorbing blades 342 is arranged in a stepped manner, and the length of each vibration-absorbing blade 342 gradually increases in the sound-emitting direction of the speaker 8 and in the direction away from the speaker 8, so that the suction array blade close to the speaker 8 can absorb the vibration of the speaker 8, and will not hinder the suction array blade located below the suction array blade, so that each suction array blade can absorb the vibration of the speaker 8 and act together on the connecting arm.

[0081] In addition, under normal circumstances, there are two speakers 8 on the display device. By setting the two ends of the dust-collecting arm 3 to correspond to the two speakers 8, the stable force on the connecting arm can be guaranteed, and the dust removal effect of the dust-collecting blades 31 can also be improved. The dust or dust in the outdoor air is filtered through the dust box 10 and adsorbed and collected by the dust-collecting blades 31 inside the dust box 10. When the dust-collecting blades 31 reach a certain level of dust accumulation, the two speakers 8 are turned on, and the speakers 8 provide vibration to the vibration-absorbing blades 342. The vibration-absorbing blades 342 transmit the vibration to the dust-collecting blades 31 inside the dust box. The dust-collecting blades 31 shake off the dust intercepted by them through vibration, effectively preventing dust or dust from entering the optical cavity of the backlight module.

[0082] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0083] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0084] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A dustproof box, used to match the air inlet hole of the back plate, characterized in that: The dustproof box includes: The box body is buckled on the air inlet, and the bottom of the box body is provided with an opening communicating with the outside air; a partition disposed in the box body and dividing the interior of the box body into a dust storage chamber and an air inlet chamber along the height direction of the dustproof box, the dust storage chamber being below the partition, the air inlet chamber being connected to the air inlet hole, and a ventilation hole being provided on the partition to connect the dust storage chamber and the air inlet chamber; and a dust collecting arm disposed in the dust collecting chamber, and having a length direction thereof perpendicular to an opening direction of the opening; a plurality of dust collecting blades are provided on the dust collecting arm, each of the dust collecting blades being spaced apart along the length direction of the dust collecting arm, a ventilation channel being formed between two adjacent dust collecting blades, and the dust collecting blades being inclined to form an angle with the opening direction of the opening; The windward surface of the dust collecting fan blades is formed with a plurality of inner recesses; the dust collecting fan blades are evenly spaced on the dust collecting arm, and the inclination direction and angle of each dust collecting fan blade are the same; the dust collecting arm comprises an upper arm and a lower arm spaced along the opening direction of the opening, the upper arm is arranged above the lower arm, and a plurality of dust collecting fan blades are arranged on the upper arm and the lower arm; the inclination direction of each dust collecting fan blade located on the upper arm is the same, and the inclination direction of each dust collecting fan blade located on the lower arm is the same, and the inclination direction of each dust collecting fan blade located on the upper arm is opposite to the inclination direction of the dust collecting fan blade located on the lower arm; the dust collecting fan blades located on the upper arm and the dust collecting fan blades located on the lower arm are staggered in the length direction of the dust collecting arm.

2. The dustproof box according to claim 1, characterized in that: It also includes a baffle arranged in the box body, which divides the interior of the box body into a first cavity and a second cavity along the axial direction of the air inlet hole. The partition and the opening are both arranged on the second cavity. The first cavity is connected to the air inlet hole, and at least one air hole is provided on the baffle to connect the first cavity and the second cavity.

3. A backlight module, characterized in that: include: A back plate, wherein the back plate is provided with an air inlet and an air outlet that are connected to each other; as well as The dustproof box according to claim 1 or 2, wherein the dustproof box cooperates with the air inlet hole.

4. A display device, characterized in that: include: According to the backlight module of claim 3, the dust collection arm is an elastic arm, the dust collection arm includes a connecting arm disposed in the dust collection cavity, the dust collection fan blade is disposed on the connecting arm, and both ends of the connecting arm protrude from the box body and are connected to a vibration arm; Two speakers are arranged on the back panel. The two speakers correspond to the two vibration arms respectively, and the sound-emitting ends of the speakers are arranged toward the corresponding vibration arms.

5. The display device according to claim 4, wherein: The vibration arm includes a base connected to the connecting arm. A plurality of vibration-absorbing blades are arranged on the base at intervals along the sound output direction of the speaker, and each of the vibration-absorbing blades is arranged in a stepped shape.

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