CN219799946U - Backlight module and display device - Google Patents

Abstract

The utility model discloses a backlight module and display equipment, wherein the backlight module comprises a light source; the backboard is provided with a mounting cavity with an opening at one side, and the light source is arranged in the mounting cavity; the diffusion plate is arranged in the mounting cavity and provided with a light inlet side facing the light source and a light outlet side facing away from the light source; the outer frame is coated on the outer side of the back plate and used for limiting the diffusion plate in the mounting cavity; the support arms are connected with the back plate at one end, and extend towards the direction close to the diffusion plate at the other end, wherein at least two support arms are arranged and are abutted to two opposite sides of the diffusion plate; the technical scheme solves the technical problem of high manufacturing cost of the existing display module.

Description

Backlight module and display device

Technical Field

The utility model relates to the technical field of display, in particular to a backlight module and display equipment.

Background

With the advancement of technology and the improvement of mass consumption, various types of display devices have been widely used in televisions, business displays, educational machines, and the like; in order to improve the display effect of brightness, color and the like of televisions, backlight modules with better brightness and uniformity such as Mini LEDs are widely applied to display devices of televisions at present.

For convenient assembly, the existing backlight module often adopts a structural scheme that a rubber frame is combined with a back plate, the rubber frame is used for supporting structures such as a diaphragm, the back plate is used for mounting a light source, and the rubber frame is connected with the back plate in a clamping manner, so that the backlight module is assembled. However, since the structural scheme involves a large number of structural members such as a back plate and a rubber frame, the structural and assembly processes are complicated, and the overall cost of the backlight module is high.

Disclosure of Invention

The utility model mainly aims to provide a backlight module and display equipment, and aims to solve the technical problem that the existing display module is high in manufacturing cost.

In order to achieve the above object, the backlight module provided by the present utility model includes:

a light source;

the backboard is provided with a mounting cavity with an opening at one side, and the light source is arranged in the mounting cavity;

the diffusion plate is arranged in the mounting cavity and provided with a light inlet side facing the light source and a light outlet side facing away from the light source;

the outer frame is coated on the outer side of the back plate and used for limiting the diffusion plate in the mounting cavity; and

the support arm, the one end of support arm with the backplate is connected, the other end of support arm extends towards being close to the direction of diffuser plate, wherein the support arm is equipped with two at least, two the support arm butt in the relative both sides of diffuser plate.

Optionally, the support arm includes:

the connecting plate is connected to one end of the backboard, which is positioned at the opening of the mounting cavity, and extends towards the inside of the mounting cavity; a kind of electronic device with high-pressure air-conditioning system

And the limiting plate is arranged at one end of the connecting plate, which is far away from the back plate, and extends back to the bottom wall direction of the back plate, and is abutted with the diffusion plate.

Optionally, the diffusion plate is provided with a limit groove, and the limit plate is embedded in the limit groove; and/or the number of the groups of groups,

the backlight module further comprises a diaphragm, the diaphragm is arranged on the light emitting side of the diffusion plate, a limiting hole is formed in the diaphragm, and the limiting plate penetrates through the limiting hole.

Optionally, the backlight module further includes a support body, where the support body is connected to one end of the back plate, which is located at the opening of the mounting cavity, and extends toward the inside of the mounting cavity, so as to support the periphery of the light inlet side of the diffusion plate.

Optionally, the outer frame includes:

an outer plate attached to the outside of the back plate;

the support plate is arranged at one end of the outer plate far away from the opening of the mounting cavity and extends towards the back plate so as to be supported at the edge of the back plate; and

the pressing plate is arranged at one end of the outer plate, which is close to the opening of the mounting cavity, and extends towards one side of the back plate, and the pressing plate and the supporting body are matched to clamp the diffusion plate and the membrane.

Optionally, the backlight module further includes a reflective sheet, one end of the reflective sheet is connected with the supporting body, and the other end of the reflective sheet is attached to the bottom wall of the mounting cavity, so as to reflect the light emitted by the light source to the diffusion plate.

Optionally, the backlight module further includes a plurality of supporting portions, where the plurality of supporting portions are disposed on a bottom wall of the mounting cavity and extend toward one side of the diffusion plate, so as to be supported on an light inlet side of the diffusion plate; and/or the number of the groups of groups,

the bottom wall of the mounting cavity is provided with a concave part, and the light source is arranged in the concave part; and/or the number of the groups of groups,

the backlight module comprises a limiting arm which is arranged at the opening of the mounting cavity, one end of the limiting arm is connected with the back plate, and the other end of the limiting arm is in butt joint with the side wall of the diffusion plate.

Optionally, the backlight module further includes a bending body disposed outside the mounting cavity, one end of the bending body is connected with the back plate, and the other end of the bending body extends towards the back side of the back plate and towards the COF flip chip film to support the COF flip chip film.

Optionally, the end face of the bending body, which is away from the back plate, is concaved inwards to form a containing groove, and the COF flip chip film is arranged in the containing groove; and/or the backboard, the supporting arm, the bending body and the supporting body are integrally bent and formed.

The present utility model also proposes a display device comprising:

the backlight module is the backlight module;

the display panel is arranged at the opening of the mounting cavity and connected with the outer frame, and the backlight module projects light towards the display panel.

Compared with the prior art, in the technical scheme, the backlight module comprises a light source and a backboard, wherein the backboard is provided with an installation cavity with an opening at one side, the light source is arranged in the installation cavity, the display function of the display module is realized by placing a display panel at the opening of the installation cavity, the installation cavity is also internally provided with a diffusion plate, the diffusion plate is provided with a light inlet side facing the light source and a light outlet side facing away from the light source, and light rays emitted by the light source enter the diffusion plate through the light inlet side and are emitted from the light outlet side after being subjected to diffusion treatment of the diffusion plate; in addition, the backlight module further comprises an outer frame, wherein the outer frame is coated on the outer side of the back plate and used for limiting the diffusion plate in the mounting cavity. In addition, the backlight module further comprises a supporting arm, one end of the supporting arm is connected to the back plate, the other end of the supporting arm extends towards the direction of the diffusion plate, at least two supporting arms are arranged on the supporting arm, and the two supporting arms are respectively abutted to two opposite sides of the diffusion plate so as to clamp the diffusion plate. In this technical scheme, through set up the support arm on the backplate, realized the installation location of diffuser plate and light source on the backplate to can save traditional backlight unit's gluey frame structure, simplified this backlight unit's structure, be favorable to reducing manufacturing cost.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an assembled backlight module and a display panel according to the present utility model;

FIG. 2 is a partial cross-sectional view of FIG. 1 at A;

FIG. 3 is a partial cross-sectional view at B in FIG. 1;

FIG. 4 is a partial cross-sectional view at C in FIG. 1;

FIG. 5 is a schematic diagram of a back plate of a backlight module according to the present utility model;

fig. 6 is a partial enlarged view at D in fig. 5.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Backlight module	20	Display panel
100	Light source	200	Backboard
				300	Diffusion plate	400	Outer frame
500	Support arm	600	Diaphragm sheet
				700	Support body	800	Reflection sheet
900	Support part	1000	Spacing arm
				1100	Bending body	410	Outer plate
420	Supporting plate	430	Pressing plate
				510	Connecting plate	520	Limiting plate

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The back plate of display device belongs to the protective shell of back of display device, and has the function of protecting internal parts of display device from external force and dust. After the liquid crystal panel is mounted on the back plate of the display device, it is necessary to ensure that only the display surface of the liquid crystal panel is exposed to the outside.

In the conventional display device, the back plate is often only used for mounting components such as a light source and a circuit board, and components such as a diffusion plate and an optical film are often mounted on a single plastic frame, and the plastic frame and the back plate are assembled to form the backlight module of the display device. However, this solution has the problems of more parts and complex structure, which results in high overall manufacturing cost of the backlight module.

In order to solve the above technical problems, the present technical solution provides a backlight module 10, including:

a light source 100;

the backboard 200 is provided with a mounting cavity with an opening at one side, and the light source 100 is arranged in the mounting cavity;

a diffusion plate 300 disposed in the mounting cavity, the diffusion plate 300 having a light inlet side facing the light source 100 and a light outlet side facing away from the light source 100;

the outer frame 400 is coated on the outer side of the back plate 200 and used for limiting the diffusion plate 300 in the mounting cavity; and

the support arms 500, one end of the support arm 500 is connected with the back plate 200, and the other end of the support arm 500 extends towards the direction close to the diffusion plate 300, wherein at least two support arms 500 are provided, and the two support arms 500 are abutted against two opposite sides of the diffusion plate 300.

Wherein the support arm 500 comprises:

a connection plate 510 connected to one end of the backplate 200 at the opening of the mounting chamber and extending toward the inside of the mounting chamber; a kind of electronic device with high-pressure air-conditioning system

The limiting plate 520 is disposed at one end of the connecting plate 510 away from the back plate 200, and extends away from the back plate 200, and the limiting plate 520 abuts against the diffusion plate 300.

Compared with the prior art, in the present technical solution, the backlight module 10 includes a light source 100 and a back plate 200, the back plate 200 has an installation cavity with an opening at one side, the light source 100 is disposed in the installation cavity, the display function of the display module is achieved by placing the display panel 20 at the opening of the installation cavity, the installation cavity is further provided with a diffusion plate 300, the diffusion plate 300 has a light inlet side facing the light source 100 and a light outlet side facing away from the light source 100, and the light emitted by the light source 100 enters the diffusion plate 300 through the light inlet side and is emitted from the light outlet side after being diffused by the diffusion plate 300; in addition, the backlight module 10 further includes an outer frame 400, the outer frame 400 is wrapped on the outer side of the back plate 200, and the outer frame 400 is used for limiting the diffusion plate 300 in the installation cavity. In addition, the backlight module 10 further includes a supporting arm 500, one end of the supporting arm 500 is connected to the back plate 200, the other end extends toward the direction of the diffusion plate 300, and at least two supporting arms 500 are provided, and the two supporting arms 500 are respectively abutted against two opposite sides of the diffusion plate 300 to clamp the diffusion plate 300. In this technical scheme, through setting up support arm 500 on backplate 200, realized the installation location of diffuser plate 300 and light source 100 on backplate 200 to can save traditional backlight unit 10's gluey frame structure, simplified this backlight unit 10's structure, be favorable to reducing manufacturing cost.

Specifically, the backlight module 10 can be applied to display products of the types of televisions, commercial displays, and the like, and in this embodiment, the application of the backlight module 10 in a Mini LED television is taken as an example, as shown in fig. 1 to 6, the display device includes the backlight module 10 and a display panel 20, wherein the display panel 20 is disposed on the top side (i.e., the side when a user views the television) of the backlight module 10, and the backlight module 10 emits light rays, projects the light rays to the display panel 20, and then presents a final display screen after being processed by the display panel 20. In this embodiment, the backlight module 10 includes a back plate 200, the back plate 200 has a mounting cavity with an opening at one side, and a light source 100 is disposed in the mounting cavity for providing illumination for the display panel 20; in addition, a diffusion plate 300 is further disposed in the installation cavity, wherein a side of the diffusion plate 300 facing the light source 100 is a light inlet side, a side facing away from the light source 100 is a light outlet side, and light emitted by the light source 100 enters the diffusion plate 300 and can be diffused by the diffusion plate 300, so that the light projected onto the display panel 20 is more uniform; in addition, the outer side of the back plate 200 is covered with an outer frame 400, and the outer frame 400 is used for forming an outer frame of the display module as a decoration, and limiting the diffusion plate 300 in the mounting cavity, and the outer frame 400 can also be used for connecting and supporting the display panel 20, so as to realize the assembly of the display panel 20 and the backlight module 10, thereby being beneficial to simplifying the overall structure of the display module, facilitating the production and assembly and reducing the manufacturing cost. In addition, in order to simplify the internal structure of the backlight module 10, the backlight module 10 further includes a supporting arm 500, where the supporting arm 500 is connected to the back plate 200 and extends towards the direction of the diffusion plate 300, in this embodiment, the supporting arm 500 includes a connecting plate 510, where the connecting plate 510 is connected to one end of the back plate 200 located at the opening of the installation cavity and extends towards the diffusion plate 300, one end of the connecting plate 510 away from the back plate 200 is connected with a limiting plate 520, where the limiting plate 520 extends away from the back plate 200, in this embodiment, the limiting plate 520 is perpendicular to the connecting plate 510, and one end surface of the limiting plate 520 facing the diffusion plate 300 is abutted against the side wall of the diffusion plate 300; in addition, a plurality of support arms 500 are disposed in the mounting cavity, and the plurality of support arms 500 are respectively disposed at two opposite sides of the diffusion plate 300, and abut against the diffusion plate 300 from two opposite sides of the diffusion plate 300 to limit and fix the diffusion plate 300. In this technical scheme, through setting up support arm 500 on backplate 200, realized the installation location of diffuser plate 300 on backplate 200, simplified the structure of this backplate 200, saved original gluey frame structure in backlight unit 10 to reached the purpose that reduces this backlight unit 10 and display device manufacturing cost.

Further, the diffusion plate 300 is provided with a limit groove, and the limit plate 520 is embedded in the limit groove;

the backlight module 10 further includes a diaphragm 600, the diaphragm 600 is disposed on the light emitting side of the diffusion plate 300, the diaphragm 600 is provided with a limiting hole, and the limiting plate 520 penetrates through the limiting hole.

Specifically, in order to improve the mounting reliability of the diffusion plate 300, a limiting groove may be formed at the edge of the diffusion plate 300, the shape of the limiting groove may be adapted to the shape of the limiting plate 520, and when the diffusion plate 300 is mounted in the mounting cavity, the limiting plate 520 of the supporting arm 500 may be embedded in the limiting groove and cooperate with the inner wall of the limiting groove, so as to further improve the positioning effect of the supporting arm 500 on the diffusion plate 300.

In addition, as shown in fig. 2 to 4, in the present embodiment, the backlight module 10 further includes a film 600, and the film 600 is disposed on the light emitting side of the diffusion plate 300 for further processing the light emitted from the diffusion plate 300. In order to further simplify the mounting structure of the backlight module 10, the edge of the diaphragm 600 may be provided with a limiting hole, the size of the limiting hole may be equal to the cross-sectional size of the limiting plate 520, and when the backlight module is assembled, the diaphragm 600 may be sleeved on the limiting plate 520 through the limiting hole, so that the limiting plate 520 may also tighten the diaphragm 600 at least on two opposite sides of the diaphragm 600 to achieve fixation.

Further, the backlight module 10 further includes a support 700 connected to one end of the back plate 200 at the opening of the installation cavity, and extending toward the inside of the installation cavity to support the periphery of the light inlet side of the diffusion plate 300. In addition, the backlight module 10 further includes a limiting arm 1000 disposed at the opening of the mounting cavity, one end of the limiting arm 1000 is connected with the back plate 200, the other end of the limiting arm 1000 extends away from the back plate 200, and the limiting arm 1000 abuts against the side wall of the diffusion plate 300.

Specifically, as shown in fig. 2 to 5, in order to facilitate the fixation of the diffusion plate 300, the backlight module 10 further includes a support body 700, the support body 700 may be a plate-shaped structural member, one end of the support body 700 is connected to one end of the back plate 200 located at the opening of the installation cavity, and the other end extends toward the inside of the installation cavity, when the diffusion plate 300 is installed, it may be placed on the support body 700, and the connection reliability between the diffusion plate 300 and the back plate 200 may be improved by supporting the periphery of the light inlet side of the diffusion plate 300 by the support body 700; in addition, it is conceivable that the support body 700 is provided around the side wall of the installation chamber for one round, so that the diffuser plate 300 can be supported in all directions, which is advantageous in improving the supporting effect. In addition, the backlight module 10 further includes a limiting arm 1000, where the limiting arm 1000 can be disposed at an opening of the mounting cavity, one end of the limiting arm 1000 is connected with the backplate 200, the other end extends away from the backplate 200, and the limiting arm 1000 extends around the opening of the mounting cavity for a circle, when the diffusion plate 300 is mounted on the backplate 200, the limiting arm 1000 can abut against or be in clearance fit with a side wall of the diffusion plate 300, so that the diffusion plate 300 is limited inside the limiting arm 1000, which is beneficial to improving the reliability of connection between the diffusion plate 300 and the backplate 200.

Further, the outer frame 400 includes:

an outer plate 410 attached to the outside of the back plate 200;

a support plate 420 disposed at one end of the outer plate 410 away from the opening of the mounting cavity and extending toward the backplate 200 to be supported at the edge of the backplate 200; and

the pressing plate 430 is disposed at one end of the outer plate 410 near the opening of the mounting cavity, and extends toward one side of the back plate 200, and the pressing plate 430 cooperates with the support 700 to clamp the diffusion plate 300 and the membrane 600.

Referring to fig. 2, in this embodiment, the outer frame 400 includes an outer plate 410, the outer plate 410 is a plate-shaped structure, the outer plate 410 can be attached to a side wall of the backplate 200, a support plate 420 is disposed at one end of the outer plate 410 near one side of the backplate 200, the support plate 420 extends toward one side of the backplate 200 and is supported at an edge of the backside of the backplate 200, a pressing plate 430 is disposed at a position of the outer plate 410 near an opening of the mounting cavity, and the pressing plate 430 extends toward one side of the backplate 200, such that a space is formed by the pressing plate 430 and the support body 700, the diffusion plate 300 and the membrane 600 are disposed in the space, the diffusion plate 300 and the membrane 600 can be limited by cooperation of the pressing plate 430 and the support body 700, and in addition, one side end surface of the pressing plate 430 facing away from the mounting cavity can be used for supporting the display panel 20, and the assembly of the display panel 20 and the backlight module 10 can be achieved by placing and mounting the display panel 20 on the pressing plate 430.

Further, as shown in fig. 2 to 4, the backlight module 10 further includes a reflective sheet 800, one end of the reflective sheet 800 is connected to the supporting body 700, and the other end of the reflective sheet 800 is attached to the bottom wall of the mounting cavity, so as to reflect the light emitted by the light source 100 to the diffusion plate 300. In order to improve the service efficiency of the light source 100, the backlight module 10 further comprises a reflective sheet 800, the reflective sheet 800 is disposed in the mounting cavity, one end of the reflective sheet 800 is attached to a side end surface of the supporting body 700 away from the bottom wall of the mounting cavity, the other end is attached to the bottom wall of the mounting cavity, the reflective sheet 800 is disposed around the light source 100 and is inclined at a certain angle towards one side of the diffusion plate 300, when the light source 100 projects light, the light projected onto the reflective sheet 800 is reflected to the diffusion plate 300 and emitted from the light emitting side, thereby reducing light loss, being beneficial to improving the service efficiency of the light source 100 and optimizing the illumination effect of the backlight module 10.

Further, the backlight module 10 further includes a plurality of supporting portions 900, where the plurality of supporting portions 900 are disposed on the bottom wall of the mounting cavity and extend towards one side of the diffusion plate 300, so as to be supported on the light inlet side of the diffusion plate 300; and/or the bottom wall of the mounting cavity is provided with a recess, and the light source 100 is arranged in the recess.

Further, as shown in fig. 2, the backlight module 10 further includes a plurality of supporting portions 900, the supporting portions 900 may be plate-shaped structures, the supporting portions 900 may be disposed at intervals on the bottom wall of the installation cavity, the cross-sectional area of the supporting portions 900 may decrease from the bottom wall of the installation cavity to one side of the opening, so as to reduce shielding of the light source 100, and one end of the supporting portion 900 away from the bottom wall of the installation cavity may be supported on the light inlet side of the diffusion plate 300, so as to prevent the rod diffusion plate 300 from collapsing toward the installation cavity due to gravity, thereby ensuring the use effect of the backlight module 10. In addition, in order to facilitate the installation and positioning of the light source 100, the bottom wall of the installation cavity may be recessed to form a recess portion, and the recess portion may be adapted to the size of the light source 100, so that the light source 100 may be embedded in the recess portion, thereby realizing the installation and positioning of the light source 100.

Further, the backlight module 10 further includes a bending body 1100 disposed outside the mounting cavity, one end of the bending body 1100 is connected to the backplate 200, and the other end of the bending body 1100 extends towards the back side of the backplate 200 and towards the COF flip chip film to support the COF flip chip film. As shown in fig. 4, in order to facilitate the mounting and positioning of the COF structure of the display module, the backlight module 10 further includes a bending body 1100, the bending body 1100 can be disposed outside the mounting cavity, one end of the bending body 1100 is connected with the backplate 200, and the other end of the bending body bends and extends towards the back side direction of the backplate 200, when the display panel 20 is mounted on the backlight module 10, the COF can be attached to the outer surface of the bending body 1100 and bends towards the back side of the backplate 200, so as to facilitate the PCB board connected on the COF to be fixed on the backplate 200.

Further, the end surface of the bending body 1100, which is away from the backplate 200, is concaved inwards to form a containing groove, and the COF flip chip film is arranged in the containing groove; and/or, backplate 200, support arm 500, spacing arm 1000, bent body 1100, and support body 700 are integrally formed. In order to further ensure the stability of the position of the COF after being mounted, the end surface of the bending body 1100 away from the backplate 200 (the end surface of the bending body 1100 and the COF are attached to each other) can be concavely formed into a plurality of accommodating grooves, the positions of the plurality of accommodating grooves can correspond to the positions of the COF, when the display panel 20 is mounted on the backlight module 10, the COF can be accommodated in the accommodating grooves, on one hand, the side wall of the accommodating groove can limit the COF, and when the backlight module 10 collides, the COF can be prevented from collision, thereby being beneficial to guaranteeing the reliability and safety of the use of the backlight module. In addition, in order to further reduce the complexity of manufacturing the backlight module 10, the backplate 200, the support arm 500, the limiting arm 1000, the bending body 1100 and the support body 700 in the present embodiment may be manufactured by an integral molding process such as integral bending, which is beneficial to reducing the structural complexity of the backlight module 10 and reducing the manufacturing cost of the backlight module 10.

The utility model also provides a display device, the display module comprises:

a backlight module 10, wherein the backlight module 10 is the backlight module 10 described above;

the display panel 20 is disposed at the opening of the mounting cavity and connected to the outer frame 400, and the backlight module 10 projects light toward the display panel 20. The specific structure of the backlight module 10 refers to the above embodiments, and since the display device adopts all the technical solutions of all the embodiments, the display device has at least all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A backlight module, comprising:

a light source;

the backboard is provided with a mounting cavity with an opening at one side, and the light source is arranged in the mounting cavity;

the diffusion plate is arranged in the mounting cavity and provided with a light inlet side facing the light source and a light outlet side facing away from the light source;

the outer frame is coated on the outer side of the back plate and used for limiting the diffusion plate in the mounting cavity; and

the support arm, the one end of support arm with the backplate is connected, the other end of support arm extends towards being close to the direction of diffuser plate, wherein the support arm is equipped with two at least, two the support arm butt in the relative both sides of diffuser plate.

2. The backlight module of claim 1, wherein the support arm comprises:

the connecting plate is connected to one end of the backboard, which is positioned at the opening of the mounting cavity, and extends towards the inside of the mounting cavity; a kind of electronic device with high-pressure air-conditioning system

And the limiting plate is arranged at one end, far away from the back plate, of the connecting plate, and extends back to the back plate, and is abutted with the diffusion plate.

3. The backlight module according to claim 2, wherein the diffusion plate is provided with a limit groove, and the limit plate is embedded in the limit groove; and/or the number of the groups of groups,

the backlight module further comprises a diaphragm, the diaphragm is arranged on the light emitting side of the diffusion plate, a limiting hole is formed in the diaphragm, and the limiting plate penetrates through the limiting hole.

4. The backlight module according to claim 1, further comprising a support body connected to an end of the back plate at the opening of the mounting cavity and extending toward the inside of the mounting cavity to support a periphery of the light inlet side of the diffusion plate.

5. The backlight module according to claim 4, wherein the outer frame comprises:

an outer plate attached to the outside of the back plate;

the support plate is arranged at one end of the outer plate far away from the opening of the mounting cavity and extends towards the back plate so as to be supported at the edge of the back plate; and

the pressing plate is arranged at one end of the outer plate, which is close to the opening of the mounting cavity, and extends towards one side of the back plate, and the pressing plate and the supporting body are matched to clamp the diffusion plate and the membrane.

6. The backlight module according to claim 4, further comprising a reflective sheet, wherein one end of the reflective sheet is connected to the supporting body, and the other end of the reflective sheet is attached to the bottom wall of the mounting cavity, so as to reflect the light emitted by the light source to the diffusion plate.

7. The backlight module according to claim 4, further comprising a plurality of supporting portions disposed on a bottom wall of the mounting cavity and extending toward one side of the diffusion plate to be supported on an light inlet side of the diffusion plate; and/or the number of the groups of groups,

the bottom wall of the mounting cavity is provided with a concave part, and the light source is arranged in the concave part; and/or the number of the groups of groups,

the backlight module comprises a limiting arm which is arranged at the opening of the mounting cavity, one end of the limiting arm is connected with the back plate, and the other end of the limiting arm is in butt joint with the side wall of the diffusion plate.

8. The backlight module according to claim 4, further comprising a bending body disposed outside the mounting cavity, wherein one end of the bending body is connected to the back plate, and the other end of the bending body extends toward the back side of the back plate and toward the COF flip chip film to support the COF flip chip film.

9. The backlight module according to claim 8, wherein the end surface of the bending body facing away from the back plate is concaved inwards to form a containing groove, and the COF flip chip film is arranged in the containing groove; and/or the backboard, the supporting arm, the bending body and the supporting body are integrally bent and formed.

10. A display device, characterized by comprising:

a backlight module, the backlight module being as claimed in any one of claims 1 to 9;

the display panel is arranged at the opening of the mounting cavity and connected with the outer frame, and the backlight module projects light towards the display panel.