CN116786555A - Dustproof box, backlight module and display device - Google Patents

Abstract

The application relates to a dustproof box, a backlight module and display equipment, wherein the dustproof box is used for being matched with an air inlet hole of a backboard, and comprises: the box body is buckled on the air inlet hole, and an opening communicated with outside air is formed in the bottom of the box body; the baffle plate is arranged in the box body, the interior of the box body is divided into a dust accumulation cavity and an air inlet cavity along the height direction of the dustproof box, the dust accumulation cavity is arranged below the baffle plate, the air inlet cavity is communicated with the air inlet hole, and the baffle plate is provided with a vent hole for communicating the dust accumulation cavity with the air inlet cavity; the dust accumulation arm is arranged in the dust accumulation cavity, the length direction of the dust accumulation arm is perpendicular to the opening direction, a plurality of dust accumulation fan blades are arranged on the dust accumulation arm, each dust accumulation fan blade is arranged at intervals along the length direction of the dust accumulation arm, a ventilation channel is formed between every two adjacent dust accumulation fan blades, and the inclined arrangement of the dust accumulation fan blades forms an included angle with the opening direction. The dust-proof box can effectively prevent dust in outdoor environment from entering the optical cavity of the module along with the air inlet channel of the module, and influences the outdoor service life of the module.

Description

Dustproof box, backlight module and display device

Technical Field

The application relates to the technical field of display, in particular to a dustproof box, a backlight module and display equipment.

Background

In recent years, with the development and maturity of Mini LED (Mini Light-Emitting Diode) and related technologies around the same, the application of a Mini LED display is more and more wide, and the Mini LED display gradually goes into the daily life of people and becomes a common display application technology. The Mini LED display module has obvious advantages in the aspects of high brightness, high color gamut, high contrast and the like, is particularly suitable for public places with outdoor strong light, such as a market outdoor display screen, a square display screen, a bus station display screen and the like, and can bring clear outdoor display for people. Although the outdoor application needs are wide, the Mini LED module has large heat productivity due to the large number of LEDs, and the module is required to solve the heat dissipation problem, so that a heat dissipation ventilating duct is inevitably required to be designed on the module. However, the outdoor environment has much dust, so that the dust easily enters the optical cavity of the module along with the air inlet channel of the module, and the outdoor service life of the module is seriously influenced.

Disclosure of Invention

The application provides a dustproof box, a backlight module and display equipment, which are used for solving the problem that dust in the outdoor environment enters the inside of a light cavity of the module and influences the outdoor service life of the module.

In a first aspect, the present application provides a dust-proof box for cooperation with an air inlet of a back plate, the dust-proof box comprising:

the box body is buckled on the air inlet hole, and an opening communicated with outside air is formed in the bottom of the box body;

the baffle is arranged in the box body and divides the interior of the box body into a dust accumulation cavity and an air inlet cavity along the height direction of the dustproof box, the dust accumulation cavity is arranged below the baffle, the air inlet cavity is communicated with the air inlet hole, and the baffle is provided with a vent hole for communicating the dust accumulation cavity with the air inlet cavity; and

the dust accumulation arm is arranged in the dust accumulation cavity, the length direction of the dust accumulation arm is perpendicular to the opening direction, a plurality of dust accumulation fan blades are arranged on the dust accumulation arm, and each dust accumulation fan blade is arranged along the dust accumulation armThe dust collecting blades are obliquely arranged to form an included angle with the opening direction of the opening _。

In one possible implementation, the windward side of the dust-collecting fan blade is formed with a plurality of concave parts.

In one possible implementation manner, each dust collecting fan blade is uniformly arranged on the dust collecting arm at intervals, and the inclination direction and the included angle of each dust collecting fan blade are the same.

In one possible implementation manner, the dust accumulating arm includes an upper arm and a lower arm which are arranged at intervals along the opening direction of the opening, the upper arm is arranged above the lower arm, and a plurality of dust accumulating fan blades are arranged on the upper arm and the lower arm.

In one possible implementation, the tilt directions of the dust collecting blades on the upper arm are the same, the tilt directions of the dust collecting blades on the lower arm are the same, and the tilt directions of the dust collecting blades on the upper arm are opposite to the tilt directions of the dust collecting blades on the lower arm.

In one possible implementation manner, each dust collecting fan blade located on the upper arm and each dust collecting fan blade located on the lower arm are staggered in the length direction of the dust collecting arm.

In a possible implementation manner, the air inlet box further comprises a baffle plate arranged in the box body, the baffle plate is used for dividing the interior of the box body into a first cavity and a second cavity along the axial direction of the air inlet hole, the baffle plate and the opening are both arranged on the second cavity, the first cavity is communicated with the air inlet hole, and at least one through-air hole is formed in the baffle plate to be communicated with the first cavity and the second cavity.

In a second aspect, the present application provides a backlight module, including:

the back plate is provided with an air inlet and an air outlet which are communicated with each other; and

the dust-proof box of the first aspect, wherein the dust-proof box is matched with the air inlet.

In a third aspect, the present application provides a display device, including the backlight module according to the second aspect, where the dust accumulating arm is an elastic arm, the dust accumulating arm includes a connecting arm disposed in the dust accumulating cavity, the dust accumulating fan blade is disposed on the connecting arm, and two ends of the connecting arm protrude from the box body and are both connected with vibrating arms;

the back plate is provided with two loudspeakers, the two loudspeakers correspond to the two vibrating arms respectively, and the loudspeaker ends of the loudspeakers face the corresponding vibrating arms.

In one possible implementation manner, the vibrating arm includes a base body connected to the connecting arm, and a plurality of vibration absorbing fan blades are arranged on the base body at intervals along the sound emitting direction of the loudspeaker, and each vibration absorbing fan blade is arranged in a step shape.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

the dustproof box provided by the embodiment is characterized in that the dustproof box is communicated with outdoor air and a dust accumulation cavity of the box body through the opening, is communicated with the dust accumulation cavity and the air inlet cavity through the vent hole, and is communicated with the air inlet cavity of the box body and the back plate through the air inlet hole, so that the outdoor air can enter the back plate through the opening, the vent hole and the air inlet hole in sequence, and the effect of ventilation and heat dissipation is achieved on optical components inside the back plate. Through setting up the laying dust flabellum in laying dust intracavity, and laying dust flabellum slope sets up for the laying dust flabellum has the windward side that sets up towards the opening, makes the outside air that enters into the box body through the opening can flow to the windward side of laying dust flabellum, plays certain adsorption effect through the dust in the laying dust flabellum to the outside air, and ventilation channel between two adjacent laying dust flabellums is passed through to the air after the dust absorption circulates, makes this dust absorption box both can reduce the dust and enters into the backplate inside, still can ensure that air stable enters into the backplate through the fresh air inlet, promotes backlight unit's life.

Drawings

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

In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, and it will be obvious to a person skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic diagram of the overall structure of a dust-proof box according to an embodiment of the present application;

FIG. 2 is an exploded view (I) of FIG. 1;

FIG. 3 is an exploded view (II) of FIG. 1;

FIG. 4 is a schematic diagram of the housing in FIG. 2;

FIG. 5 is a schematic diagram (II) of the housing in FIG. 2;

FIG. 6 is a rear view of a housing in a dust box according to an embodiment of the present application;

FIG. 7 is an isometric view of FIG. 6;

FIG. 8 is an isometric view of a housing in a dust box according to an embodiment of the present application;

FIG. 9 is an axial schematic view of a dust arm in a dust box according to an embodiment of the present application;

fig. 10 is an enlarged view of a portion a of fig. 9;

FIG. 11 is a schematic cross-sectional view of a dust box mated with a back plate according to an embodiment of the present application;

FIG. 12 is a schematic structural view of a back plate;

fig. 13 is a schematic structural diagram of a backlight module according to an embodiment of the present application;

FIG. 14 is an exploded view of FIG. 13;

fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present application;

fig. 16 is an enlarged view of a portion B of fig. 15.

Reference numerals illustrate:

10. a dust-proof box;

1. a case body; 11. a housing; 12. an upper cover; 13. an opening; 14. a dust accumulation cavity; 15. an air inlet cavity; 16. a first cavity; 17. a second cavity;

2. a partition plate; 21. a vent hole;

3. a dust-collecting arm; 31. dust collecting fan blades; 311. an inner concave portion; 32. an upper arm; 33. a lower arm; 34. vibrating arms; 341. a base; 342. vibration absorbing fan blades;

4. a baffle; 41. a wind hole; 42. a partition plate; 43. rib

5. A mounting plate; 51. a mounting position;

7. the mouth word glue; 8. a speaker;

20. a back plate; 201. an air inlet hole; 202. and an air outlet hole.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," "above," "front," "rear," and the like, may be used herein to describe one element's or feature's relative positional relationship or movement to another element's or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figure experiences a position flip or a change in attitude or a change in state of motion, then the indications of these directivities correspondingly change, for example: an element described as "under" or "beneath" another element or feature would then be oriented "over" or "above" the other element or feature. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

In order to solve the problem that the outdoor backlight module in the prior art is used for guaranteeing the heat dissipation of internal optical components and the like, the backlight module is provided with a heat dissipation and ventilation air duct, but more dust in the outdoor environment enters the light intensity of the backlight module along with the heat dissipation and ventilation air duct, and the service life of the backlight module outdoors can be seriously influenced. The application provides a dustproof box which can ensure that air flow enters a backboard to radiate heat of optical components and the like, and can also play a role in adsorbing and collecting dust in outdoor air, so that the dust entering the inside of a backlight module is reduced, the safety of the optical components in the backlight module is ensured, and the service life of the backlight module is prolonged.

First embodiment

Referring to fig. 1-9, an embodiment of the present application provides a dust box 10, the dust box 10 being adapted to cooperate with an air inlet opening 201 of a back plate 20, the dust box 10 comprising:

the box body 1 is buckled on the air inlet 201, and an opening 13 communicated with the outside air is formed in the bottom of the box body 1;

the partition board 2 is arranged in the box body 1, and separates the interior of the box body 1 into a dust accumulation cavity 14 and an air inlet cavity 15 along the height direction of the dustproof box 10, the dust accumulation cavity 14 is arranged below the partition board 2, the air inlet cavity 15 is communicated with the air inlet hole 201, and the partition board 2 is provided with a vent hole 21 for communicating the dust accumulation cavity 14 with the air inlet cavity 15; and

the dust collection arms 3 are arranged in the dust collection cavity 14, the length direction of each dust collection arm is perpendicular to the opening direction of the opening 13, a plurality of dust collection blades 31 are arranged on each dust collection arm 3, each dust collection blade 31 is arranged at intervals along the length direction of each dust collection arm 3, a ventilation channel is formed between every two adjacent dust collection blades 31, and each dust collection blade 31 is obliquely arranged to form an included angle with the opening direction of the opening 13.

According to the dustproof box 10 provided by the application, the outdoor air is communicated with the dust accumulation cavity 14 of the box body 1 through the opening 13, the dust accumulation cavity 14 is communicated with the air inlet cavity 15 through the vent hole 21, and the air inlet cavity 15 of the box body 1 is communicated with the back plate 20 through the air inlet hole 201, so that the outdoor air can enter the back plate 20 through the opening 13, the vent hole 21 and the air inlet hole 201 in sequence, and the ventilation and heat dissipation effects are achieved on optical components in the back plate 20. Through setting up laying dust flabellum 31 in laying dust chamber 14, and laying dust flabellum 31 slope sets up, make laying dust flabellum 31 have the windward side that sets up towards opening 13, make the outside air that enters into the inside box body 1 through opening 13 can flow to the windward side of laying dust flabellum 31, play certain adsorption through the dust in the laying dust flabellum 31 to the outside air, ventilation channel between two adjacent laying dust flabellums 31 is passed through to the air after the dust absorption, make this dust absorption box both can reduce the dust and enter into backplate 20 inside, still can ensure that air stable enters into backplate 20 through inlet 201, promote backlight unit's life.

Referring to fig. 1, 2, 12 and 14, the box 1 includes a housing 11 and an upper cover 12, the housing 11 is provided with a first opening, a second opening and the opening 13, the first opening and the second opening are disposed on opposite sides of the housing 11, the first opening is used for communicating the interior of the housing 11 with an air inlet 201 of the back plate 20, the upper cover 12 is provided at the second opening to close the second opening, and the opening 13 on the housing 11 is used for communicating the interior of the housing 11 with the outside air. The box body 1 is buckled at the air inlet 201 of the backboard 20, i.e. the first opening is buckled at the air inlet 201 of the backboard 20. In order to ensure the sealing connection between the first opening and the back plate 20, a sealing element may be further disposed between the first opening and the back plate 20, so as to effectively avoid the communication between the external environment and the air inlet 201 through the gap between the first opening and the back plate 20. In the application, the first opening is connected with the back plate 20 through the adhesive connection of the letter adhesive 7, so that the sealing connection between the shell 11 and the back plate 20 is realized.

With reference to fig. 3, the second opening is formed in the casing 11, so that the partition board 2 and the dust accumulating arm 3 inside the box body 1 can be conveniently assembled, and the second opening is formed by covering the partition board 2 and the dust accumulating arm 3 through the upper cover 12 after the installation of the partition board 2 and the dust accumulating arm 3 is completed, so that when the dust-proof box 10 works, external air enters the box body 1 through the opening 13 of the box body 1, and the maximum adsorption effect of the dust accumulating arm 3 on dust such as dust in the external air is realized. Of course, in order to avoid outside air from entering the inside of the case 1 through the gap between the upper cover 12 and the second opening, the upper cover 12 and the second opening are provided with a seal to seal the dust-proof case 10. In the application, the second opening and the upper cover 12 are connected in an adhesive manner through the letter-opening glue 7, so that the overall sealing effect of the dustproof box 10 is ensured.

The opening 13 is formed in the bottom of the box body 1, so that external air flows to the dust accumulating arm 3 from bottom to top in the moving direction, the windward side of the dust accumulating arm 3 is the side of the dust accumulating arm 3 facing the bottom, the windward side of the dust accumulating arm 3 is mainly used for contacting with external air to adsorb dust, dust and the like in the external air, so that the dust or the dust is adsorbed on the side of the dust accumulating arm 3 facing the bottom, when the dust or the dust on the dust accumulating arm 3 is adsorbed to a certain extent, the dust or the dust and the like can fall down through self gravity, and can be discharged from the box body 1 directly through the opening 13, and the dust removing effect of the dust preventing box 10 is facilitated.

Referring to fig. 3, 8 and 9, each dust collecting fan blade 31 is uniformly and alternately distributed in the length direction of the dust collecting arm 3, and the inclination direction and the included angle of each dust collecting fan blade 31 are the same, and a ventilation channel is formed between two adjacent dust collecting fan blades 31, so that the dust collecting fan blades 31 are uniformly and alternately arranged, and the inclination direction and the included angle of each dust collecting fan blade 31 are the same, so that the shape of the ventilation channels is consistent, and the ventilation stability of the dust box 10 is further ensured, so that the heat dissipation effect on the optical components in the back plate 20 is ensured.

In connection with fig. 10, of course, in actual use, the inclination directions of the dust collecting fan blades 31 may be identical, partially identical or completely different. In addition, the included angles of the dust collecting fan blades 31 may be identical, partially identical or completely different.

In order to ensure the dust accumulation effect of the dust accumulation arm 3, two adjacent dust accumulation blades 31 are arranged, wherein the top end of one dust accumulation blade 31 is adjacent to the bottom end of the other dust accumulation blade 31, and the two dust accumulation blades 31 are spliced to form an integral shape based on the orthographic projection of the opening 13. That is, in the opening direction of the opening 13, the top end of one dust collecting fan blade 31 covers the bottom end of the other dust collecting fan blade 31, so that the air flowing through the ventilation channel can be completely contacted with the windward side of one dust collecting fan blade 31 and guided by the windward side of the dust collecting fan blade 31.

The windward side of the dust-collecting fan blade 31 is formed with a plurality of concave portions 311, and the concave portions 311 are arranged to make the windward side of the dust-collecting fan blade 31 be an uneven plane, and the concave portions 311 can promote the adsorption effect because the larger the surface roughness is, the stronger the adsorption force of the dust or dust is. Alternatively, the plurality of concave portions 311 are uniformly spaced apart on the dust collecting fan blade 31. Of course, the orthographic projection shape of the concave portion 311 may be a circle, rectangle, triangle, or other polygonal shape. Illustratively, in the present application, the orthographic projection shape of the concave portion 311 is a circle, and the concave portion 311 disposed by the circle may be opened as much as possible on the windward side of the dust collecting fan blade 31, and the center-to-center distance between adjacent concave portions 311 is between 2mm and 5 mm.

Referring to fig. 3-5, the side walls of the box 1 corresponding to the bottom are all provided with openings 13 to ensure the air intake of the box 1. In order to ensure the dust accumulation effect, two ends of the dust accumulation arm 3 are respectively connected with two opposite side walls of the box body 1. The inside length direction interval along laying dust arm 3 of box body 1 is provided with a plurality of mounting panels 5, has offered on the mounting panel 5 and is used for with laying dust arm 3 matched with installation position 51, installation position 51 can be hole form structure or groove structure to cooperate with laying dust arm 3, through a plurality of installation positions 51 in order to strengthen the position stability of laying dust arm 3 in box body 1.

Referring to fig. 2, in order to secure the air intake, a plurality of ventilation holes 21 are formed in the partition plate 2 along the length direction of the dust accumulation arm 3, and the dust accumulation chamber 14 and the air intake chamber 15 are communicated through the plurality of ventilation holes 21. Alternatively, the plurality of ventilation holes 21 are provided in one-to-one correspondence with the plurality of ventilation channels.

Referring to fig. 8-10, the dust collecting arm 3 includes an upper arm 32 and a lower arm 33 that are disposed at intervals along the opening direction of the opening 13, the upper arm 32 is disposed above the lower arm 33, and a plurality of dust collecting blades 31 are disposed on the upper arm 32 and the lower arm 33. Through being provided with upper arm 32 and lower arm 33 at opening 13's opening direction interval for after the laying dust of laying dust flabellum 31 on the outer air through lower arm 33, still can carry out secondary laying dust through the laying dust flabellum 31 on the upper arm 32 again, further promote the laying dust effect. Of course, the dust-collecting arm 3 may be further provided with a plurality of arms along the opening direction of the opening 13, and the plurality of arms may include an upper arm 32, a plurality of middle arms and a lower arm 33, through which the dust collecting effect is improved in multiple stages. As an example, the present application has been described by taking only the dust depositing arm 3 provided with two arms, and the upper arm 32 and the lower arm 33, respectively, as an example, it is known that when the arms are provided in plural, the arrangement structure and principle are the same as or similar to those when two are provided.

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; the processing, preparation and installation of the dust collecting fan blades 31 on the upper arm 32 are facilitated by setting the inclination directions of the plurality of dust collecting fan blades 31 on the upper arm 32 to be the same, and the processing, preparation and installation of the dust collecting fan blades 31 on the lower arm 33 are facilitated by setting the inclination directions of the plurality of dust collecting fan blades 31 on the lower arm 33 to be the same. By setting the inclination direction of each dust collecting fan blade 31 on the upper arm 32 opposite to the inclination direction of each dust collecting fan blade 31 on the lower arm 33, the air passing through the dust collecting fan blades 31 can be guided secondarily to increase the contact area between the air and the dust collecting fan blades 31, thereby increasing the dust adsorption force.

Each dust collecting fan blade 31 located on the upper arm 32 and each dust collecting fan blade 31 located on the lower arm 33 are staggered in the length direction of the dust collecting arm 3, and the plurality of dust collecting fan blades 31 on the dust collecting arm 3 are staggered up and down in the length direction of the dust collecting arm 3, so that the air outlet end of the ventilation channel located on the lower arm 33 corresponds to the dust collecting fan blade 31 located on the upper arm 32, and dust in air is adsorbed to the greatest extent.

Alternatively, the included angle of the dust collecting fan blades 31 located on the upper arm 32 is the same as the included angle of the dust collecting fan blades 31 located on the lower arm 33, and is 45 degrees. Through the setting of the laying dust flabellum 31 of 45 degrees inclinations, both can ensure its area of contact to the air and to the adsorption effect such as dust in the air, through also can ensure the water conservancy diversion effect to the air, guarantee the steady circulation and the circulation rate of ventilation channel interior air.

Referring to fig. 4-7 and 12, the dust-proof box 10 further includes a baffle 4 disposed in 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 axial direction of the air inlet 201, the baffle 2 and the opening 13 are both disposed on the second cavity 17, the first cavity 16 is communicated with the air inlet 201, and at least one air through hole 41 is formed in the baffle 4 to communicate with the first cavity 16 and the second cavity 17. The arrangement of the baffle 4 is used for dividing the interior of the box body 1 into the first cavity 16 and the second cavity 17, the air inlet 201 of the back plate 20 is communicated with the first cavity 16, the cross section area of the first cavity 16 is larger, the installation position of the box body 1 on the back plate 20 is not limited, the installation position of the box body 1 on the back plate 20 can be guaranteed when the air inlet 201 is formed in the edge of the back plate 20, the edge of the back plate 20 cannot be protruded by the dustproof box 10, and the compactness and miniaturization of the whole structure of the backlight module are guaranteed. The plurality of through-air holes 41 are arranged to improve the air inlet quantity, so that the heat dissipation effect is further ensured.

Second embodiment

Referring to fig. 12 and 13, the embodiment of the present application further provides a backlight module, which includes a back plate 20 and the dust-proof box 10 described in the foregoing embodiment, where an air inlet 201 and an air outlet 202 are formed on the back plate 20, and the air inlet and the air outlet are communicated with each other. The technical features of the dust-proof box 10 may be referred to the foregoing description, and will not be repeated here. The backlight module disclosed in the embodiment of the present application includes the dust-proof box 10 provided in the foregoing embodiment, so the backlight module having the dust-proof box 10 also has all the above technical effects, and will not be described in detail herein.

Referring to fig. 5, 6 and 14, a plurality of air inlet holes 201 are uniformly spaced on the back plate 20, and in any air inlet direction, the ventilation channels, the ventilation holes 21 and the corresponding air passing holes 41 are communicated to form a plurality of heat dissipation channels, and the plurality of heat dissipation channels are arranged in a one-to-one correspondence with the plurality of air inlet holes 201 so as to ensure uniform air inlet. The same heat dissipation channel can be provided with a plurality of through-air holes 41, so that the ventilation quantity is improved through the plurality of through-air holes 41.

Referring to fig. 10, a plurality of partition plates 42 are correspondingly disposed on the baffle plate 4 at intervals, the partition plates 42 are disposed in the first cavity 16, the partition plates 42 are disposed at intervals along the arrangement direction of the plurality of air inlet holes 201, a channel is formed between two adjacent partition plates 42, the channel communicated with the air through holes 41 can stably flow into the corresponding air inlet holes 201, a plurality of ribs are disposed in the air channel which is not communicated with the air through holes 41 at intervals, and the connection strength is improved through the plurality of ribs.

Third embodiment

Referring to fig. 2, 15 and 16, the embodiment of the present application further provides a display device, which includes the backlight module set described in the foregoing embodiment, where the dust-collecting arm 3 is an elastic arm, and the elastic arm may be made of plastic or rubber. The dust accumulating arm 3 comprises a connecting arm arranged in the dust accumulating cavity 14, the dust accumulating fan blades 31 are arranged on the connecting arm, and two ends of the connecting arm protrude out of the box body 1 and are connected with vibrating arms 34; two speakers 8 are disposed on the back plate 20, the two speakers 8 respectively correspond to the two vibrating arms 34, and the speaker ends of the speakers 8 are disposed towards the corresponding vibrating arms 34. Because the dust accumulating arm 3 is an elastic arm, the sound of the sound-raising end of the loudspeaker 8 is used for playing a vibrating effect on the dust accumulating arm 3, the dust accumulating arm 3 absorbs the vibration of the loudspeaker 8, so that the dust accumulating fan blade 31 on the dust accumulating arm 3 can generate corresponding vibration, the dust accumulating fan blade 31 is driven to vibrate through the vibration of the dust accumulating arm 3, and dust or dust on the dust accumulating fan blade 31 can drop downwards through the vibration, thereby realizing the self-cleaning effect of the dust accumulating fan blade 31.

The vibrating arm 34 includes a base 341 connected to the connecting arm, and a plurality of vibration absorbing blades 342 are disposed on the base 341 along the sound emitting direction of the speaker 8 at intervals, where each vibration absorbing blade 342 is disposed in a stepped manner. The ladder-shaped structure is used for uniformly absorbing the vibration of the loudspeaker 8, so that the absorption effect of the vibration arms 34 on the vibration of the loudspeaker 8 is improved, and the self-cleaning effect of the dust-collecting fan blades 31 is further improved. Optionally, each vibration absorbing fan blade 342 is arranged in a step shape, in the sound emitting direction of the speaker 8, and in the direction away from the speaker 8, the length of each vibration absorbing fan blade 342 is gradually increased, so that the vibration of the speaker 8 can be absorbed by the vibration absorbing fan blade close to the speaker 8, and the vibration absorbing fan blade located below the vibration absorbing fan blade can not have an obstructing effect, so that the vibration of the speaker 8 can be absorbed by each vibration absorbing fan blade to act on the connecting arm together.

In addition, the number of the speakers 8 on the display device is two in general, and the two ends of the dust collection arm 3 are corresponding to the two speakers 8, so that the stable stress of the connecting arm is ensured, and the dust collection effect of the dust collection fan blades 31 can be improved. Dust or dust in the outdoor air is filtered by the dust-proof box 10 and is adsorbed and collected by the dust-collecting fan blades 31 inside the dust-proof box 10. When the dust collecting fan blades 31 reach a certain dust collecting degree, the two loudspeakers 8 are opened, the loudspeakers 8 provide vibration for the vibration absorbing fan blades 342, the vibration absorbing fan blades 342 transmit the vibration to the dust collecting fan blades 31 in the dust collecting box, and the dust collecting fan blades 31 shake off dust intercepted by the dust collecting fan blades through vibration, so that the dust or dust is effectively prevented from entering the optical cavity of the backlight module.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A dustproof box for cooperate with the fresh air inlet of backplate, its characterized in that, dustproof box includes:

the box body is buckled on the air inlet hole, and an opening communicated with outside air is formed in the bottom of the box body;

the baffle is arranged in the box body and divides the interior of the box body into a dust accumulation cavity and an air inlet cavity along the height direction of the dustproof box, the dust accumulation cavity is arranged below the baffle, the air inlet cavity is communicated with the air inlet hole, and the baffle is provided with a vent hole for communicating the dust accumulation cavity with the air inlet cavity; and

the dust accumulation arm is arranged in the dust accumulation cavity, the length direction of the dust accumulation arm is perpendicular to the opening direction of the opening, a plurality of dust accumulation fan blades are arranged on the dust accumulation arm, each dust accumulation fan blade is arranged at intervals along the length direction of the dust accumulation arm, a ventilation channel is formed between every two adjacent dust accumulation fan blades, and the dust accumulation fan blades are obliquely arranged to form an included angle with the opening direction of the opening.

2. The dust box of claim 1, wherein the windward side of the dust retention blades is formed with a plurality of concave portions.

3. The dust box of claim 1, wherein the dust blades are uniformly spaced on the dust arm, and the inclined direction and the included angle of each dust blade are the same.

4. A dust box according to any one of claims 1 to 3, wherein the dust accumulating arm comprises an upper arm and a lower arm which are arranged at intervals along the opening direction of the opening, the upper arm is arranged above the lower arm, and a plurality of dust accumulating fan blades are arranged on the upper arm and the lower arm.

5. The dust box of claim 4, wherein the tilt direction of each dust blade on the upper arm is the same, the tilt direction of each dust blade on the lower arm is the same, and the tilt direction of each dust blade on the upper arm is opposite to the tilt direction of the dust blade on the lower arm.

6. The dust box of claim 4, wherein each dust blade on the upper arm is staggered with each dust blade on the lower arm in a length direction of the dust arm.

7. The dust-proof box according to claim 1, further comprising a baffle plate arranged in the box body, wherein the baffle plate divides the interior of the box body into a first cavity and a second cavity along the axial direction of the air inlet, the baffle plate and the opening are both arranged on the second cavity, the first cavity is communicated with the air inlet, and at least one air through hole is formed in the baffle plate to be communicated with the first cavity and the second cavity.

8. A backlight module, comprising:

the back plate is provided with an air inlet and an air outlet which are communicated with each other; and

a dust box according to any one of claims 1 to 7, which is fitted to the air inlet.

9. A display device, characterized by comprising: the backlight module of claim 8, wherein the dust accumulating arm is an elastic arm, the dust accumulating arm comprises a connecting arm arranged in the dust accumulating cavity, the dust accumulating fan blade is arranged on the connecting arm, and two ends of the connecting arm protrude out of the box body and are connected with vibrating arms;

the back plate is provided with two loudspeakers, the two loudspeakers correspond to the two vibrating arms respectively, and the loudspeaker ends of the loudspeakers face the corresponding vibrating arms.

10. The display apparatus according to claim 9, wherein the vibrating arm includes a base body connected to the connecting arm, and a plurality of vibration absorbing blades are provided on the base body at intervals in a sound emitting direction of the speaker, each of the vibration absorbing blades being arranged in a stepwise manner.