CN114815396A - Backlight module and display device - Google Patents

Abstract

The application discloses backlight unit and display device. The backlight module comprises a back plate, a middle frame and an optical assembly, wherein the back plate comprises a bottom plate, the middle frame comprises a supporting plate and a side plate assembly, the supporting plate and the bottom plate are arranged oppositely, the side plate assembly is connected to the edge of the supporting plate and extends towards the direction of the bottom plate, the supporting plate and the side plate assembly jointly enclose to form an installation space, the optical assembly is arranged in the installation space, a retaining wall assembly is convexly arranged at one part of the edge of at least one side edge of the bottom plate towards the direction of the supporting plate, and an avoiding space is formed above the other part of the edge; the side plate assembly comprises a first side plate, and the first side plate is in insertion fit with the retaining wall assembly in the direction vertical to the bottom plate; the optical assembly comprises an optical diaphragm, an open slot is formed in part of the edge of the optical diaphragm, the retaining wall assembly is embedded into the open slot, and the other part of the edge of the optical diaphragm extends into the avoiding space. According to the technical scheme, the effect of the narrow frame of the backlight module can be realized, and the brightness area can be enlarged.

Description

Backlight module and display device

Technical Field

The present disclosure relates to display technologies, and particularly to a backlight module and a display device using the same.

Background

With the technological progress, the liquid crystal display device has an ultra-narrow frame and even no frame, and the liquid crystal display device includes a backlight module and a display panel, and the backlight module is disposed on the backlight side of the display panel to provide a light source for the display panel.

The backlight module comprises a back plate and a middle frame, the back plate in the traditional backlight module usually comprises a bottom plate and a side plate which is convexly arranged at the edge of the bottom plate, and the middle frame is nested outside the side plate, so that the frame size of the backlight module is not less than the sum of the width of the middle frame and the thickness of the side plate of the back plate, the frame of the backlight module is wider, and the development of the frameless liquid crystal display device is difficult to promote.

Disclosure of Invention

The present application provides a backlight module, which aims to make a frame of the backlight module narrower.

In order to achieve the above object, the backlight module provided by the present application includes a back plate, a middle frame and an optical assembly, wherein the back plate includes a bottom plate, the middle frame includes a supporting plate and a side plate assembly, the supporting plate is disposed opposite to the bottom plate, the side plate assembly is connected to an edge of the supporting plate and extends toward a direction of the bottom plate, the supporting plate and the side plate assembly together enclose to form an installation space, the optical assembly is disposed in the installation space, a retaining wall assembly is convexly disposed on a partial edge of at least one side edge of the bottom plate toward the direction of the supporting plate, and an avoiding space is formed above another partial edge of the bottom plate; the side plate assembly comprises a first side plate, and the first side plate is in insertion fit with the retaining wall assembly in a direction perpendicular to the bottom plate; the optical assembly comprises an optical diaphragm, an open slot is formed in the edge of part of the optical diaphragm, the retaining wall assembly is embedded into the open slot, and the edge of the other part of the optical diaphragm extends into the avoiding space.

Optionally, the bottom plate has a first side and a second side that are opposite to each other, the bottom plate further has a third side and a fourth side that are opposite to each other, the optical assembly further includes a light emitting element, the light emitting element is disposed close to the fourth side, and both ends of the first side and both ends of the second side are respectively connected to the third side and the fourth side; the partial edge of first side, the partial edge of second side and the partial edge of third side all is equipped with protrudingly the barricade subassembly.

Optionally, the retaining wall assembly comprises a retaining wall body and supporting columns, and the retaining wall body is in insertion fit with the first side plate in a direction perpendicular to the bottom plate; the utility model discloses a keep away from groove, including base plate, barricade body, first curb plate, support column, bottom plate, support column, the support column is located the inboard of barricade body, the confession has still been seted up to first curb plate the groove of dodging of support column holding, the support column is kept away from the terminal surface of bottom plate with dodge the cell wall butt in groove, the support column embedding in the open slot.

Optionally, the support posts are interspersed with a plurality of reflective particles.

Optionally, the supporting pillar is injection molded on the retaining wall body.

Optionally, the first side edge, the second side edge and the third side edge are further provided with a hanging lug in a protruding mode, a hanging lug groove is formed in the first side plate, and the hanging lug is clamped into the hanging lug groove.

Optionally, the edge of the fourth side is convexly provided with a connecting plate, the side plate assembly further comprises a second side plate, the first side plate and the second side plate jointly enclose to form a closed frame, and the connecting plate is clamped with the second side plate.

Optionally, the protruding joint portion that is equipped with in the outside of connecting plate, the second side panel corresponds joint portion has seted up the joint hole, joint portion card is gone into in the joint hole.

Optionally, the backlight module further comprises a connecting adhesive tape, one end of the connecting adhesive tape is bonded to the outer surface of the side plate assembly, and the other end of the connecting adhesive tape is connected to one side of the bottom plate, which is far away from the supporting plate.

The application also provides a display device, which comprises a display panel and the backlight module, wherein the backlight module is arranged on the light inlet side of the display panel, so that the display panel provides a light source.

This application technical scheme is equipped with the barricade subassembly through the direction of the backup pad of the at least side of the bottom plate of backplate towards the center, then the barricade subassembly can carry on spacingly to installing the optical assembly in the installation space. In addition, through the protruding barricade subassembly that is equipped with in the partial edge of at least one side at the bottom plate, and the center still includes the curb plate subassembly, through with the cooperation of pegging graft in the direction of perpendicular bottom plate of the first curb plate in barricade subassembly and the curb plate subassembly, make barricade subassembly and the projection of first curb plate in the bottom plate place plane coincide partially at least to make backlight unit's frame width be less than barricade subassembly thickness size and the first side plate thickness size sum of center in this application, consequently can realize the effect of the narrow frame of backlight unit.

Further, in this application, through the protruding barricade subassembly that is equipped with in the partial edge of at least one side at the bottom plate, another partial edge does not set up the barricade subassembly, but is formed with the space of dodging in the top of another partial edge to through having seted up the open slot at optical film's partial edge, barricade subassembly embedding open slot, optical film another partial edge extends to dodging in the space, then has increased optical film's area, thereby is favorable to enlarging backlight unit's luminous region.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a backlight module according to a first embodiment of the present application without a middle frame;

fig. 2 is a schematic partial structure view of a viewing angle of the backlight module with the middle frame according to the first embodiment of the present disclosure;

FIG. 3 is a schematic partial perspective view of a backlight module according to a first embodiment of the present disclosure with a different viewing angle after the middle frame is removed;

FIG. 4 is a cross-sectional view A-A of FIG. 3 with the middle frame disposed;

FIG. 5 is a cross-sectional view B-B of FIG. 3 after the middle frame has been positioned;

FIG. 6 is a schematic view of a portion of a back plate of a backlight module according to a first embodiment of the present disclosure;

FIG. 7 is a partial perspective view of a backlight module according to a first embodiment of the present application;

fig. 8 is a cross-sectional view of a display device according to a second embodiment of the present application.

The reference numbers illustrate:

the implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used for explaining the relative position relationship between the components, the motion situation, and the like under a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The display device generally includes a display panel for displaying images and a backlight module disposed at a light incident side of the display panel to provide a light source for the display panel. The backlight module comprises a back plate and a middle frame, wherein the back plate is connected with the middle frame and jointly encloses to form an accommodating cavity for installing the light-emitting assembly and the optical assembly. The backplate includes the bottom plate, light emitting component locates on the bottom plate of backplate, one side that light emitting component deviates from the bottom plate is located to optical assembly, the center is connected with the backplate, specifically be the lateral wall that the bottom plate was still located to the backplate including protruding, the center is cover body structure, the center cover is located outside the lateral wall of backplate, thereby make backlight unit's frame width size not less than the lateral wall thickness size of backplate and the thickness size sum of center, thereby make backlight unit's frame width great, be unfavorable for display device to narrow frame direction development.

In view of this, embodiments of the present disclosure provide a backlight module 1 and a display device using the backlight module 1.

The first embodiment is as follows:

in the embodiment of the present application, please refer to fig. 1 and fig. 2 in combination, the backlight module 1 includes a back plate 100, a middle frame 200 and an optical assembly, the back plate 100 includes a bottom plate 130, the middle frame 200 includes a supporting plate 230 and a side plate assembly, the supporting plate 230 is disposed opposite to the bottom plate 130, the side plate assembly is connected to an edge of the supporting plate 230 and extends toward the bottom plate 130, the supporting plate 230 and the side plate assembly jointly enclose to form an installation space, the optical assembly is disposed in the installation space, a part of an edge of at least one side of the bottom plate 130 is provided with a retaining wall assembly 110 protruding toward the supporting plate 230, and an avoiding space is formed above another part of the edge; the side plate assembly comprises a first side plate 210, and the first side plate 210 is matched with the retaining wall assembly 110 in an inserting manner in a direction vertical to the bottom plate 130; the optical assembly includes an optical film 300, an opening groove 301 is formed on a part of the edge of the optical film 300, the retaining wall assembly 110 is embedded in the opening groove 301, and another part of the edge of the optical film 300 extends into the avoiding space.

The bottom plate 130 of the back plate 100, the supporting plate 230 of the middle frame 200, and the side plate assembly of the middle frame 200 together enclose a mounting space, in which optical components, such as light emitting elements, a light guide plate, and an optical film 300, etc., are mounted, wherein the light emitting elements can be disposed on one side of the back plate 100, the light guide plate is disposed opposite to the bottom plate 130 of the back plate 100, and the optical film 300 is disposed on one side of the light guide plate away from the bottom plate 130. The side of the supporting plate 230 of the middle frame 200 facing away from the bottom plate 130 is used for installing the display panel 2 and supporting the display panel 2. At least one side of the bottom plate 130 is protruded with a retaining wall assembly 110 toward the supporting plate 230, and the retaining wall assembly 110 can limit the components such as the optical film 300 disposed between the bottom plate 130 and the supporting plate 230. The edge of the supporting plate 230 of the middle frame 200 is further connected with a side plate assembly, the side plate assembly includes a first side plate 210, the first side plate 210 and the retaining wall assembly 110 are in insertion fit in a direction perpendicular to the bottom plate 130, so that the projection of the first side plate 210 on the plane of the bottom plate 130 is at least partially overlapped with the projection of the retaining wall assembly 110 on the plane of the bottom plate 130, and thus the frame width of the backlight module 1 is smaller than the sum of the thickness of the first side plate 210 of the middle frame 200 and the thickness of the retaining wall assembly 110, and the frame width of the backlight module 1 is reduced.

In the present application, the retaining wall assembly 110 is convexly disposed on a part of the edge of at least one side of the bottom plate 130, and it can be understood that the retaining wall assembly 110 is not disposed on at least a part of the edge of the bottom plate 130, so that an avoiding space is formed above the edge of the bottom plate 130 where the retaining wall assembly 110 is not disposed, and the optical film 330 can extend into the avoiding space, thereby enlarging a disposition area of the optical film 330, enlarging a light emitting area of the backlight module 1, and further setting the width of the supporting plate 230 in the middle frame 200 to be narrower, which is beneficial for the development of the backlight module 1 and the display device using the backlight module 1 toward the direction of the narrow frame. In addition, in the present application, the edge of the optical film 300 is provided with the opening groove 301, and the retaining wall assembly 110 is embedded in the opening groove 301, so that it can be understood that at least a portion of the optical film 300 extends into the above mentioned avoiding space, thereby enlarging the area of the optical film 300 and enlarging the brightness range of the backlight module 1. It should be noted that the direction from the bottom plate 130 to the supporting plate 230 in the present application is defined as an upward direction.

Specifically, the base plate 130 is generally rectangular, that is, the base plate 130 has four edges enclosing to form a rectangle, and the retaining wall assembly 110 can be disposed on at least any one of the four edges of the base plate 130. When the first side plate 210 of the middle frame 200 is engaged with the retaining wall assembly 110 in a direction perpendicular to the bottom plate 130, one of the first side plate 210 and the retaining wall assembly 110 is provided with an insertion slot 211, and the other one is inserted into the insertion slot 211. In one embodiment, as shown in fig. 4, the first side plate 210 of the middle frame 200 is formed with a slot 211, and the retaining wall assembly 110 is inserted into the slot 211. The slot 211 may be opened on a side of the first side plate 210 away from the optical film 300; the slot 211 may be disposed on a side of the first side plate 210 facing the optical film 300, or the slot 211 is disposed in the middle of the first side plate 210, that is, the slot 211 is formed by the end surface of the first side plate 210 departing from the supporting plate 230 and recessing toward the supporting plate 230. When the retaining wall assembly 110 is inserted into the insertion groove 211 of the first side plate 210, the outer edge of the first side plate 210 and the outer edge of the retaining wall assembly 110 may or may not be flush with each other in the direction perpendicular to the bottom plate 130. When the outer edge of the first side plate 210 and the outer edge of the retaining wall assembly 110 are disposed in parallel and level in the direction perpendicular to the bottom plate 130, the frame of the backlight module 1 can be made narrower, so that the frame width of the backlight module 1 is equal to the thickness of the first side plate 210 of the middle frame 200, and thus, the formation of a narrow frame can be facilitated. In another embodiment, the retaining wall is formed with a slot 211, and the first side plate 210 is inserted into the groove of the retaining wall. The slot 211 can be formed by a retaining wall that is recessed towards the bottom plate 130 from the end surface of the bottom plate 130, and the first side plate 210 of the middle frame 200 can be inserted into the slot 211.

In the present invention, the retaining wall assembly 110 is disposed on at least one side of the bottom plate 130 of the back plate 100 toward the supporting plate 230 of the middle frame 200, so that the retaining wall assembly 110 can limit the optical assembly installed in the installation space. In addition, the retaining wall assembly 110 is protruded at a portion of the edge of at least one side of the bottom plate 130, and the middle frame 200 further includes a side plate assembly, by inserting and matching the retaining wall assembly 110 with the first side plate 210 in the side plate assembly in the direction perpendicular to the bottom plate 130, the projection of the retaining wall assembly 110 and the first side plate 210 in the plane of the bottom plate 130 at least partially coincide, so that the frame width of the backlight module 1 in the present application is less than the sum of the thickness of the retaining wall assembly 110 and the thickness of the first side plate 210 of the middle frame 200, therefore, the effect of narrow frame of the backlight module 1 can be achieved, and further, by arranging the retaining wall assembly 110 at the edge of at least one side of the bottom plate 130, it will be appreciated that, at least some of the edges of the base 130 are not provided with retaining wall assemblies 110, thereby providing an escape space for the optical film 300 to extend toward the edge near the bottom plate 110. In the present application, the opening groove 301 is formed at the edge of the optical film 300, and the retaining wall assembly 110 is embedded in the opening groove 301, so that at least a portion of the optical film 300 in the optical assembly can extend into the avoiding space above the edge of the corresponding bottom plate 130 where the retaining wall assembly 110 is not disposed, thereby facilitating the enlargement of the light emitting area of the backlight module 1.

Further, as shown in fig. 1, the bottom plate 130 has a first side 101 and a second side 102 disposed oppositely, the bottom plate 130 further has a third side 103 and a fourth side 104 disposed oppositely, the optical assembly includes a light emitting element disposed near the fourth side 104, and both ends of the first side 101 and both ends of the second side 102 are respectively connected to the third side 103 and the fourth side 104; part of the edge of the first side 101, part of the edge of the second side 102 and part of the edge of the third side 103 are provided with retaining wall components 110 in a protruding manner.

It can be understood that, usually, the light emitting elements are disposed on the ground side close to the display device, that is, corresponding to the fourth side 104, when the user uses the display device, the user can usually easily see the top side (corresponding to the third side 103), the left side (corresponding to the first side 101), and the right side (corresponding to the second side 102) of the display screen, so that the frame width of the three sides can make the user intuitively feel the frame width of the backlight module 1 and the display device, and therefore, the frame widths of the top side, the left side, and the right side of the backlight module 1 are smaller by the retaining wall assemblies 110 protruding from the third side 103, the first side 101, and the second side 102 of the bottom plate 130, so that the backlight module 1 as a whole looks as a narrower frame.

It should be noted that, in the technical solution of the present application, "the top side", "the left side", and "the right side" all use the position of the display surface of the display panel 2 when the user is facing the display panel 2, as a reference, the side above the bottom plate 130 of the backlight module 1 is the top side, the edge on the left side of the bottom plate 130 of the backlight module 1 is the left side, and the edge on the right side of the bottom plate 130 of the backlight module 1 is the right side.

Further, as shown in fig. 1, a part of the edge of the first side 101, a part of the edge of the second side 102, and a part of the edge of the third side 103 are all provided with a retaining wall component 110 in a protruding manner.

By protruding the retaining wall assembly 110 only on a part of the edge of the first side 101, a part of the edge of the second side 102, or a part of the edge of the third side 103, the cost of disposing the retaining wall assembly 110 can be reduced, the fixing of the middle frame 200 is facilitated, and the middle frame 200 can be limited by the retaining wall assembly 110 in a direction parallel to the bottom plate 130. In addition, the retaining wall assembly 110 is only arranged on a part of the edge of the first side 101, a part of the edge of the second side 102, or a part of the edge of the third side 103 in a protruding manner, so that an avoiding space can be correspondingly arranged above the other part of the edge of the first side 101, the other part of the edge of the second side 102, or the other part of the edge of the third side 103, and the optical film 300 can also extend into the avoiding spaces, so as to facilitate enlarging the area of the optical film 300 and further increase the display area.

Specifically, referring to fig. 4 and fig. 6, the retaining wall assembly 110 includes a retaining wall body 111 and supporting pillars 112, wherein the retaining wall body 111 is inserted into and matched with the first side plate 210 in a direction perpendicular to the bottom plate 130; the supporting pillar 112 is disposed on the inner side of the retaining wall body 111, the first side plate 210 is further provided with an avoiding groove 212 for accommodating the supporting pillar 112, an end surface of the supporting pillar 112 far away from the bottom plate 130 is abutted to a groove wall of the avoiding groove 212, and the supporting pillar 112 is embedded in the open groove 301.

The retaining wall body 111 is formed by protruding the edge of the bottom plate 130, and the retaining wall body 111 and the first side plate 210 of the middle frame 200 are in inserting fit in the direction perpendicular to the bottom plate 130, so that the projection of the retaining wall body 111 in the plane of the bottom plate 130 is at least partially overlapped with the projection of the first side plate 210 in the plane of the bottom plate 130, and thus the frame width of the backlight module 1 is small, which is beneficial to the development of the backlight module 1 and the display device to the direction of narrow frame.

Through locating the support column 112 in the inner side of the retaining wall body 111, and the end surface of the support column 112 far away from the bottom plate 130 abuts against the groove wall of the avoiding groove 212 of the first side plate 210, so that the support column 112 can effectively support the middle frame 200, and when the end surface of the support column 112 far away from the bottom plate 130 is a plane, the middle frame 200 can be guaranteed to have higher flatness. Wherein the support post 112 may be entirely located within the avoidance slot 212, or the support post 112 may be partially located within the avoidance slot 212. When the supporting pillars 112 are partially located in the avoiding groove 212, a side of the supporting pillars 112 close to the retaining wall body 111 is located in the avoiding groove 212, and a side of the supporting pillars 112 facing the optical film 300 extends out of the avoiding groove 212. Of course, to further achieve a narrower bezel effect, the support posts 112 may all extend into the escape slots 212. Specifically, the supporting pillars 112 can be disposed to be close to the inner sidewalls of the retaining wall body 111, and the supporting pillars 112 can also be disposed at a certain interval from the inner sidewalls of the retaining wall body 111. In order to further facilitate the effect of the narrow frame, the supporting pillars 112 are preferably arranged to be attached to the inner side wall of the retaining wall body 111.

In addition, in the technical solution of the present application, the end surface of the supporting pillar 112 departing from the bottom plate 130 may be disposed non-parallel to the end surface of the retaining wall body 111 departing from the bottom plate 130, that is, the direction perpendicular to the bottom plate 130 is defined as the height direction, the bottom plate 130 is disposed lower than the supporting plate 230, the top end surface of the supporting pillar 112 may be disposed lower than the top end surface of the retaining wall body 111, and the avoiding groove 212 of the middle frame 200 is adapted to the supporting pillar 112, so that the top end of the retaining wall body 111 facing to the side of the optical film 300 can be further limited to the middle frame 200, and the middle frame 200 is limited from moving outwards. Of course, in other embodiments, the top end surface of the supporting pillar 112 may be higher than the top end surface of the retaining wall body 111, and the avoiding groove 212 of the middle frame 200 is matched with the supporting pillar 112. It should be noted that, in the present invention, if the supporting pillar 112 needs to be injection molded by attaching to the retaining wall body 111, the top end surface of the injection molded supporting pillar 112 may be disposed lower than the top end surface of the retaining wall body 111 or disposed flush with the top end surface of the retaining wall body 111.

An opening groove 301 is formed in the edge of the optical film 300, which faces the supporting column 112, and the supporting column 112 is inserted into the opening groove 301, so that the arrangement area of the optical film 300 is enlarged, and the light-emitting area is increased; on the other hand, the optical film 300 can be limited by the supporting columns 112, and the optical film 300 is prevented from moving in a direction parallel to the bottom plate 130. The support posts 112 may be semi-cylindrical, rectangular, or other shapes. In order to prevent the supporting columns 112 from damaging the optical film 300, the supporting columns 112 may preferably be semi-cylindrical, the surface of the supporting columns 112 facing the optical film 300 is a cambered surface, and in addition, the opening grooves 301 of the optical film 300 may be configured into a shape matched with the shape of the supporting columns 112, so as to prevent the optical film 300 from being damaged by the supporting columns 112.

In one embodiment, the supporting pillars 112 are injection molded on the retaining wall body 111. So set up, can make support column 112 and barricade body 111 become an organic whole, guarantee that support column 112 has higher intensity.

Specifically, the retaining wall body 111 may be formed with a first injection hole, so that the support pillar 112 may be formed by injection molding through the first injection hole toward the inner side of the retaining wall, and a portion of the injection-molded support pillar 112 extends into the first injection hole, so as to be connected with the retaining wall body 111 more stably. One, two, three or more first injection holes may be formed at intervals in the height direction of the retaining wall body 111, i.e., in the direction perpendicular to the bottom plate 130. In addition, a second injection molding hole can be formed in the floor of the back plate 100, so that injection molding can be performed to the inner side of the retaining wall body 111 through the second injection molding hole, and the injection molded support column 112 and the retaining wall body 111 can be in an integrated structure, thereby ensuring the stable connection effect of the injection molding and the integral connection of the two.

Further, the supporting pillars 112 are dispersed with a plurality of reflective particles.

By dispersing a plurality of reflective particles in the supporting posts 112, the brightness loss at the opening groove 301 of the optical film 300 can be compensated, so that the brightness display area of the backlight module 1 is further enlarged, and the backlight module 1 has a good light output effect. Before injection molding, the support posts 112 are added with reflective particles in the injection molding material, so that the reflective particles dispersed in the molded support posts 112 are more uniform, and the backlight module 1 has a better and uniform light emitting effect.

In other embodiments, the supporting column 112 may be integrally connected with the middle frame 200, for example, the supporting column 112 may be injection molded on the middle frame 200. Specifically, the supporting pillar 112 may be injection molded on a side of the supporting plate 230 of the middle frame 200 facing the bottom plate 130, and an end of the supporting pillar 112 away from the supporting plate 230 abuts against the bottom plate 130, so as to ensure that the upper surface of the middle frame 200 has a high flatness. The supporting pillars 112 may be located on a side of the retaining wall body 111 facing the optical film 300, that is, the supporting pillars 112 are located on a side of the retaining wall body 111 facing the display area, or the supporting pillars 112 and the retaining wall body 111 may be arranged at intervals or closely attached to each other along an edge of the bottom plate 130.

Of course, the supporting pillar 112 may also be integrally connected to the bottom plate 130, and the supporting pillar 112 extends toward the supporting plate 230 and abuts against the supporting plate 230, so that the supporting pillar 112 has a better supporting effect on the middle frame 200, and the upper surface of the middle frame 200 has a higher flatness. The supporting pillars 112 can still be disposed on the side of the retaining wall body 111 facing the optical film 300, i.e. the supporting pillars 112 are disposed on the side of the retaining wall body 111 facing the display area. Alternatively, the supporting columns 112 and the retaining wall body 111 may be arranged at intervals or closely attached to each other along the edge of the bottom plate 130.

As shown in fig. 2, based on the above-mentioned scheme that the bottom plate 130 has the first side 101 and the second side 102 which are oppositely arranged, and the bottom plate 130 has the third side 103 and the fourth side 104 which are oppositely arranged, in order to further ensure the assembly flatness of the upper surface of the metal middle frame 200, in this embodiment, the edges of the first side 101, the second side 102 and the third side 103 are further provided with the hanging lugs 120 in a protruding manner, the first side plate 210 of the middle frame 200 is provided with the hanging lug grooves, and the hanging lugs 120 are clamped into the hanging lug grooves.

Specifically, the lug groove can be formed in one side of the first side plate 210 deviating from the optical film 300, one end of the lug 120 is connected with the side of the bottom plate 130, the other end of the lug bypasses the end of the first side plate 210 close to the bottom plate 130 and extends into the lug groove, and the lug 120 can abut against the groove wall of the lug groove facing the direction of the bottom plate 130, so that the middle frame 200 is further supported stably and the flatness of the upper surface of the middle frame 200 is guaranteed.

Further, referring to fig. 1 and fig. 7, a connecting plate 140 is protruded from an edge of the fourth side 104, the side plate assembly further includes a second side plate 220, the first side plate 210 and the second side plate 220 together enclose to form a closed frame, and the connecting plate 140 is clamped with the second side plate 220.

The connecting plate 140 is convexly arranged at the edge of the fourth side 104, and the connecting plate 140 is clamped with the second side plate 220 of the middle frame 200, so that the middle frame 200 and the ground side of the bottom plate 130 have a good connecting effect. The connection plate 140 is formed by protruding all edges of the fourth side 104, or the connection plate 140 is formed by protruding part of the edges of the fourth side 104, and the second side plate 220 of the middle frame 200 abuts against other edges of the fourth side 104, so as to avoid light leakage from the fourth side 104.

Specifically, the outer side of the connecting plate 140 is convexly provided with a clamping portion 141, the second side plate 220 of the middle frame 200 is provided with a clamping hole 221 corresponding to the clamping portion 141, and the clamping portion 141 is clamped in the clamping hole 221.

The clamping portion 141 is protruded from the outer side of the connecting plate 140, so that the clamping portion 141 does not occupy more space for disposing the optical film 300, thereby enlarging the disposition area of the optical film 300 and increasing the light emitting area. In addition, the clamping portion 141 is clamped into the clamping hole 221 of the second side plate 220 of the middle frame 200, so that the middle frame 200 can be prevented from moving in the direction perpendicular to the bottom plate 130, and the middle frame 200 can be further ensured to have a stable installation effect after being installed on the back plate 100.

Of course, in other embodiments, the connecting plate 140 may also be provided with a clamping hole 221, and the second side plate 220 of the middle frame 200, which corresponds to the connecting plate 140, is provided with a clamping portion 141, and the clamping portion 141 is clamped in the clamping hole 221, so as to achieve the clamping effect between the connecting plate 140 and the middle frame 200.

As shown in fig. 7, in order to move the middle frame 200 in the direction from the third side 103 to the fourth side 104, the second side plate 220 of the middle frame 200 is further provided with a limiting groove 222, the limiting groove 222 is formed by recessing the end surface of the second side plate 220 away from the supporting plate 230 in the direction of the supporting plate 230, and the connecting plate 140 is inserted into the limiting groove 222, so that the middle frame 200 and the fourth side 104 are limited to each other, and the middle frame 200 and the fourth side 104 are prevented from moving in the direction from the third side 103 to the fourth side 104.

Further, as shown in fig. 7, in order to further prevent the middle frame 200 from being separated from the rear panel 100 in a direction perpendicular to the bottom panel 130, the backlight module 1 in the present embodiment further includes a connection tape 400, one end of the connection tape 400 is adhered to an outer surface of the side panel assembly of the middle frame 200, and the other end of the connection tape is connected to a side of the bottom panel 130 away from the supporting panel 230.

Specifically, the connecting adhesive tape 400 may have one end adhered to the outer surface of the first side plate 210 of the middle frame 200 and the other end connected to the side of the bottom plate 130 away from the supporting plate 230. The connecting tape 400 may further have one end adhered to the outer surface of the second side plate 220 of the middle frame 200 and the other end connected to the side of the bottom plate 130 facing away from the supporting plate 230. With such an arrangement, the connection strength between the middle frame 200 and the rear panel 100 is further improved.

Example two:

the present application further provides a display device, as shown in fig. 8, the display panel 2 includes a display panel 2 and a backlight module 1, and the specific structure of the backlight module 1 refers to the above embodiments, and since the display device adopts all technical solutions of all the above embodiments, the display device at least has all beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated here. The backlight module 1 is disposed on the light incident side of the display panel 2 to provide a light source for the display panel 2. Specifically, the display panel 2 may be directly adhered to the support plate 230 of the middle frame 200 by a double-sided adhesive tape.

The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.

Claims (10)

1. A backlight module comprises a back plate, a middle frame and an optical assembly, wherein the back plate comprises a bottom plate, the middle frame comprises a supporting plate and a side plate assembly, the supporting plate is arranged opposite to the bottom plate, the side plate assembly is connected to the edge of the supporting plate and extends towards the direction of the bottom plate, the supporting plate and the side plate assembly jointly enclose to form an installation space, and the optical assembly is arranged in the installation space; the side plate assembly comprises a first side plate, and the first side plate is in inserted fit with the retaining wall assembly in a direction perpendicular to the bottom plate; the optical assembly comprises an optical membrane, an open slot is formed in the edge of part of the optical membrane, the retaining wall assembly is embedded into the open slot, and the edge of the other part of the optical membrane extends into the avoiding space.

2. The backlight module according to claim 1, wherein the chassis has a first side and a second side opposite to each other, the chassis further has a third side and a fourth side opposite to each other, the optical assembly comprises a light emitting element disposed adjacent to the fourth side, and both ends of the first side and both ends of the second side are connected to the third side and the fourth side, respectively;

the partial edge of first side, the partial edge of second side and the partial edge of third side all is equipped with protrudingly the barricade subassembly.

3. The backlight module according to claim 2, wherein the retaining wall member comprises:

the retaining wall body is in inserted fit with the first side plate in a direction perpendicular to the bottom plate; and

the support column is located the inboard of barricade body, the confession has still been seted up to first curb plate the groove of dodging of support column holding, the support column is kept away from the terminal surface of bottom plate with dodge the cell wall butt in groove, the support column embedding in the open slot.

4. The backlight module of claim 3, wherein the support posts are interspersed with a plurality of reflective particles.

5. The backlight module as claimed in claim 3, wherein the supporting posts are injection molded on the retaining wall body.

6. The backlight module according to any one of claims 2 to 5, wherein the edges of the first side edge, the second side edge and the third side edge are further provided with a hanging lug in a protruding manner, the first side plate is provided with a hanging lug groove, and the hanging lug is clamped into the hanging lug groove.

7. The backlight module according to any one of claims 2 to 5, wherein a connecting plate is protruded from an edge of the fourth side, the side plate assembly further comprises a second side plate, the first side plate and the second side plate jointly enclose to form a closed frame, and the connecting plate is clamped with the second side plate.

8. The backlight module as claimed in claim 7, wherein a clamping portion is protruded from an outer side of the connecting plate, a clamping hole is formed in the second side plate corresponding to the clamping portion, and the clamping portion is clamped in the clamping hole.

9. The backlight module according to any one of claims 1 to 5, further comprising a connection tape, wherein one end of the connection tape is adhered to the outer surface of the side plate assembly, and the other end is connected to a side of the bottom plate facing away from the support plate.

10. A display device, comprising a display panel and the backlight module as claimed in any one of claims 1 to 9, wherein the backlight module is disposed at a light incident side of the display panel to provide a light source for the display panel.

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