CN219658311U - Backlight module and display device - Google Patents

Abstract

The utility model discloses a backlight module and a display device, wherein the backlight module comprises: the backboard is provided with an inner bottom surface and an outer bottom surface which are opposite, part of the inner bottom surface of the backboard protrudes towards the outer bottom surface to form a first reinforcing rib, and a first groove is formed between the first reinforcing rib and the inner bottom surface of the backboard; the lamp panel comprises a plurality of lamp strips which are distributed at intervals, part of the lamp strips are arranged on the inner bottom surface of the backboard, and at least one lamp strip is positioned above the first groove; the first cover plate is arranged above the first groove in a covering mode and is abutted to the lamp strip above the first groove to support the lamp strip, and the part of the first cover plate, which supports the lamp strip, is flush with the inner bottom surface of the backboard. The utility model can at least partially solve the problem of suspending the lamp strip and improve the luminous and display effects.

Description

Backlight module and display device

Technical Field

The disclosure belongs to the technical field of display, and in particular relates to a backlight module and a display device.

Background

At present, with the development of display technology, mini LED display products become current hot spots, and unlike the backlight scheme of light guide plate side entry adopted by traditional liquid crystal display, a huge amount of Mini LED crystal grains are adopted as backlight sources to be applied to the backlight field of a module, so that not only can the thinning of backlight be realized, but also more refined dynamic control can be realized, and the dynamic contrast of the liquid crystal display is improved.

As the Mini LED display product is large in general size, the back plate in the backlight module is large in size, and the strength of the large back plate affects the cost. At present, the back plate is mostly formed by stamping, in order to strengthen the strength of the back plate, reinforcing ribs are locally formed on the outer bottom surface of the back plate during stamping, so that the integral strength of the back plate is enhanced, and grooves are formed on the corresponding positions of the inner bottom surface of the back plate. The lamp panel in the backlight module comprises a plurality of lamp bars which are distributed at intervals, most of the lamp bars are arranged on the inner bottom surface of the back plate, and a small part of the lamp bars are positioned above the grooves, so that the lamp bars are suspended and inconsistent with other lamp bars, and the problem of uneven light emission and the like can be caused.

Disclosure of Invention

An object of the present disclosure is to provide a backlight module and a display device, which can at least partially solve the problem of suspending a light bar, and improve the lighting and display effects.

A backlight module, comprising: the backboard is provided with an inner bottom surface and an outer bottom surface which are opposite, part of the inner bottom surface of the backboard protrudes towards the outer bottom surface to form a first reinforcing rib, and a first groove is formed between the first reinforcing rib and the inner bottom surface of the backboard; the lamp panel comprises a plurality of lamp strips which are distributed at intervals, part of the lamp strips are arranged on the inner bottom surface of the backboard, and at least one lamp strip is positioned above the first groove; the first cover plate is arranged above the first groove in a covering mode and is abutted to the lamp strip above the first groove to support the lamp strip, and the part of the first cover plate, which supports the lamp strip, is flush with the inner bottom surface of the backboard.

In one exemplary embodiment of the present disclosure, the light bar and the first cover plate each extend along a length direction of the first groove, and the first cover plate covers the first groove in a width direction of the first groove, and the first cover plate covers the light bar located above the first groove in the length direction of the first groove.

In an exemplary embodiment of the disclosure, the first groove includes a first bottom wall and first side walls located at two sides of the first bottom wall, one end of the first side wall is connected with the first bottom wall, the other end of the first side wall is connected with an inner bottom surface of the back plate, a connection part between the inner bottom surface of the back plate and the first side wall is recessed toward the first bottom wall to form a first step surface, and the first cover plate is fixed on the two first step surfaces to cover the first groove in a width direction of the first groove.

In an exemplary embodiment of the present disclosure, an end of the first step surface facing away from the first groove has a mounting gap with the first cover plate.

In an exemplary embodiment of the disclosure, a boss is disposed on the first step surface, an opening is disposed on the first cover plate corresponding to the boss, and the boss is riveted in the opening, so that the first cover plate is fixed on the first step surface.

In one exemplary embodiment of the present disclosure, a portion of the inner bottom surface of the back plate protrudes toward the outer bottom surface to form a second reinforcing rib, and the second reinforcing rib and the inner bottom surface of the back plate form a second groove, and the second groove and the first groove intersect in a length direction.

In an exemplary embodiment of the disclosure, the backlight module further includes a second cover plate, where the second cover plate covers over the second groove and abuts against a light bar passing through the top of the second groove to support the light bar, and a portion of the second cover plate supporting the light bar is flush with the inner bottom surface of the back plate.

In an exemplary embodiment of the disclosure, the second groove includes a second bottom wall and two second side walls located at two sides of the second bottom wall, one end of the second side wall is connected with the second bottom wall, the other end of the second side wall is connected with the inner bottom surface of the back plate, a connection part between the inner bottom surface of the back plate and the second side wall is recessed toward the second bottom wall to form a second step surface, and the second cover plate is fixed on the two second step surfaces to cover the second groove in a width direction of the second groove.

In one exemplary embodiment of the present disclosure, the length direction of the first groove and the length direction of the second groove are perpendicular, and the first groove and the second groove intersect;

one of the first cover plate and the second cover plate is staggered in the vertical direction at the intersection to form an avoidance groove, and the other one of the first cover plate and the second cover plate penetrates out of the avoidance groove.

The second aspect of the present disclosure provides a display device, including a backlight module and a display panel sequentially disposed along an exit direction of light emitted by the light bar.

The scheme of the utility model has the following beneficial effects:

according to the utility model, the first cover plate is arranged above the first groove and is abutted with the lamp strip above the first groove to support the lamp strip, so that the lamp strip is prevented from being suspended, and the part of the first cover plate supporting the lamp strip is flush with the inner bottom surface of the backboard, so that the lamp strip supported on the first cover plate and the rest lamp strips are in the same plane, the states are as consistent as possible, adverse effects caused by the lamp strip are reduced, and the luminous and display effects are improved.

Other features and advantages of the utility model will be apparent from the following detailed description, or may be learned by the practice of the utility model.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment.

Fig. 2 is a schematic diagram illustrating another direction of a backlight module according to the first embodiment.

Fig. 3 is a schematic structural diagram of a back plate in a backlight module according to an embodiment.

Fig. 4 is an assembly schematic diagram of a back plate, a first cover plate and a second cover plate in a backlight module according to an embodiment.

Fig. 5 is a cross-sectional view taken along the direction A-A in fig. 4.

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

Fig. 7 is a sectional view in the direction B-B of fig. 4.

Fig. 8 is a partial enlarged view at E in fig. 7.

Fig. 9 is a cross-sectional view taken along the direction C-C in fig. 4.

Fig. 10 is a partial enlarged view of F in fig. 9.

Reference numerals illustrate:

back plate 1, inner bottom surface 11, first step surface 111, second step surface 112, boss 113, outer bottom surface 12, first stiffener 13, first groove 14, first bottom wall 141, first side wall 142, second stiffener 15, second groove 16, second bottom wall 161, second side wall 162, lamp panel 2, lamp bar 21, connecting portion 22, first cover plate 3, escape groove 31, second cover plate 4.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the utility model. One skilled in the relevant art will recognize, however, that the utility model may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the utility model.

The utility model will be described in further detail with reference to the drawings and the specific examples. It should be noted that the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

Example 1

As the Mini LED display product is large in general size, the back plate in the backlight module is large in size, and the strength of the large back plate affects the cost. At present, the back plate is mostly formed by stamping, in order to strengthen the strength of the back plate, reinforcing ribs are locally formed on the outer bottom surface of the back plate during stamping, so that the integral strength of the back plate is enhanced, and grooves are formed on the corresponding positions of the inner bottom surface of the back plate. The lamp panel in the backlight module comprises a plurality of lamp bars which are distributed at intervals, most of the lamp bars are arranged on the inner bottom surface of the back plate, and a small part of the lamp bars are positioned above the grooves, so that the lamp bars are suspended and inconsistent with other lamp bars, and the problem of uneven light emission and the like can be caused. In order to solve the problem, the utility model provides a backlight module.

Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment. Fig. 2 is a schematic diagram illustrating another direction of a backlight module according to the first embodiment. Fig. 4 is an assembly schematic diagram of a back plate, a first cover plate and a second cover plate in a backlight module according to an embodiment. Fig. 7 is a sectional view in the direction B-B of fig. 4. Fig. 8 is a partial enlarged view at E in fig. 7. Fig. 9 is a cross-sectional view taken along the direction C-C in fig. 4. Fig. 10 is a partial enlarged view of F in fig. 9.

Referring to fig. 1, 2, 4, 7, 8, 9 and 10, a backlight module includes a back plate 1, a lamp panel 2, a first cover plate 3 and a second cover plate 4. Wherein the back plate 1 has an inner bottom surface 11 and an outer bottom surface 12 opposite to each other, and a part of the inner bottom surface 11 of the back plate 1 protrudes toward the outer bottom surface 12 to form a first reinforcing rib 13, and the first reinforcing rib 13 and the inner bottom surface 11 of the back plate 1 form a first groove 14. It can be understood that the back plate 1 is used as a base member of the backlight module and is used for carrying other members, the back plate 1 is rectangular plate-shaped, the periphery of the back plate 1 is connected with the side plates to form an opening member with a cavity, the other members are installed in the cavity, the inner bottom surface 11 of the back plate 1 is the bottom surface in the cavity, the outer bottom surface 12 of the back plate 1 is the back side bottom surface of the main body of the back plate 1 opposite to the bottom surface in the cavity, and the outer bottom surface 12 of the back plate 1 can be installed with the outer shell of the display device so as to install the backlight module into the display device.

When the backboard 1 is molded, the backboard 1 is processed through a stamping process, the inner bottom surface 11 of the backboard 1 is stamped towards the outer bottom surface 12 to obtain the first reinforcing ribs 13, the first reinforcing ribs 13 extend beyond the outer bottom surface 12 of the backboard 1, corresponding first grooves 14 are formed on one side of the inner bottom surface 11 of the backboard 1, and the first reinforcing ribs 13 are arranged to enable the backboard 1 to be locally bent, so that the strength of the platy backboard 1 can be enhanced.

Meanwhile, in order to further strengthen the structural strength of the back plate 1, a portion of the inner bottom surface 11 of the back plate 1 protrudes toward the outer bottom surface 12 to form a second reinforcing rib 15, the second reinforcing rib 15 and the inner bottom surface 11 of the back plate 1 form a second groove 16, the second groove 16 and the first groove 14 intersect in the length direction, and the second reinforcing rib 15 and the first reinforcing rib 13 strengthen the strength of the back plate 1 in different directions. In the present embodiment, the length direction of the second groove 16 and the first groove 14 are perpendicular, for example, the length direction of the first groove 14 is parallel to the width direction of the back plate 1, and the length direction of the second groove 16 is parallel to the length direction of the back plate 1. Wherein, the shaping process of second strengthening rib 15 and first strengthening rib 13 can be unanimous, stamping forming second strengthening rib 15 in the shaping first strengthening rib 13, and first strengthening rib 13 and second strengthening rib 15 can set up a plurality of reinforcing backplate 1 intensity at intervals, and the number can be according to the design requirement.

The lamp panel 2 includes a plurality of lamp strips 21, which are mounted on the back plate 1 and spaced apart from each other, wherein a portion of the lamp strips 21 are disposed on the inner bottom surface 11 of the back plate 1, and at least one of the lamp strips 21 is disposed above the first recess 14. It can be understood that, in the fishbone type light panel 2, the light panel 2 further includes a connecting portion 22, the connecting portion 22 is elongated, and extends along the length direction or the width direction of the back plate 1, and is disposed at the edge of the inner bottom surface 11 of the back plate 1, one end of the light bar 21 is connected with the connecting portion 22, all the light bars 21 are uniformly spaced along the length direction of the connecting portion 22, the light bars 21 extend along the direction perpendicular to the connecting portion 22, and the light bars 21 are provided with light emitting elements for emitting light.

Because the number of the first grooves 14 arranged on the back plate 1 is limited, most of the light bars 21 are completely supported on the inner bottom surface 11 of the back plate 1, but because the light bars 21 are distributed at intervals, a certain interval is reserved between the adjacent light bars 21, the width of each light bar 21 is smaller than that of each first groove 14, at least one light bar 21 is positioned above the corresponding first groove 14, and part of the structure is suspended, so that the light emitting effect of each light bar 21 is affected. For the convenience of structural design and installation, the connection portion 22 of the light panel 2 extends along the length direction of the back plate 1, the light bars 21 are uniformly spaced along the length direction of the back plate 1, and the length direction of the first groove 14 is parallel to the width direction of the back plate 1, so that most of the light bars 21 above the first groove 14 are in a suspended state, and the state is inconsistent with other light bars 21, so that the overall light emission is uneven, and the light emitting effect is affected.

For this reason, in the present embodiment, the first cover plate 3 is disposed above the first groove 14 and abuts against the light bar 21 disposed above the first groove 14 to support the light bar, and the portion of the first cover plate 3 supporting the light bar 21 is flush with the inner bottom 11 of the back plate 1, so that the light bar 21 supported on the first cover plate 3 and the rest of the light bars 21 are in the same plane, and the states are as consistent as possible, so as to reduce the adverse effects caused by the same. It will be appreciated that the first cover plate 3 provides a supporting point for the light bar 21, and the mating connection portion 22 at least provides two-point support for the light bar 21 above the first recess 14, thereby avoiding the light bar 21 from being completely suspended.

Further, the first cover plate 3 of the light bar 21 extends along the length direction of the first groove 14, the first cover plate 3 covers the first groove 14 in the width direction of the first groove 14, so that the light bar 21 is completely supported in the width direction of the first groove 14, the first cover plate 3 covers the light bar 21 above the first groove 14 in the length direction of the first groove 14, the light bar 21 is completely supported in the length direction of the first groove 14, the supporting area of the light bar 21 is greatly increased, the structure is not in a suspended state and completely consistent with the state of the rest light bars 21, the light emitting effect of each light bar 21 is the same, and possible display defects are avoided.

Specifically, the first groove 14 includes a first bottom wall 141 and first side walls 142 located at two sides of the first bottom wall 141, one end of the first side wall 142 is connected to the first bottom wall 141, and the other end of the first side wall 142 is connected to the inner bottom surface 11 of the back plate 1, so as to jointly enclose the first groove 14. The connection between the inner bottom surface 11 of the back plate 1 and the first sidewall 142 is recessed toward the first bottom wall 141 to form the first step surface 111, and it is understood that the first sidewalls 142 on both sides and the inner bottom surface 11 of the back plate 1 are formed with two first step surfaces 111, the two first step surfaces 111 are respectively located on both sides in the width direction above the first groove 14, and the first cover plate 3 is fixed on the two first step surfaces 111 to cover the first groove 14 in the width direction of the first groove 14. Meanwhile, the first step surface 111 is formed by recessing the inner bottom surface 11 of the back plate 1, and the first step surface 111 is lower than the inner bottom surface 11 of the back plate 1, so that the first cover plate 3 can be flush with the inner bottom surface 11 of the back plate 1 after being fixed on the first step surface 111, and does not protrude out of the inner bottom surface 11 of the back plate 1. In addition, as the first cover plate 3 is fixedly connected with the two first step surfaces 111, the two sides of the notch of the first groove 14 are stressed, the first bottom wall 141, the first side wall 142 and the first cover plate 3 are enclosed to form a closed hollow pipe structure, the strength of the first reinforcing rib 13 and the back plate 1 is further improved, materials are not used for reinforcing in a large area, and the overall cost is reduced.

It can be understood that, as long as the length of the first cover plate 3 is greater than or equal to the length of the light bar 21, the first cover plate 3 can cover the light bar 21 above the first groove 14 in the length direction of the first groove 14, and the first cover plate 3 can completely cover the light bar 21 above the first groove 14 in cooperation with the arrangement of the first step surface 111, where the light bar 21 can be completely supported, and no suspended portion can occur.

Fig. 3 is a schematic structural diagram of a back plate in a backlight module according to an embodiment.

For example, referring to fig. 3, a boss 113 is provided on the first step surface 111, an opening is provided on the first cover plate 3 corresponding to the boss 113, when the first cover plate 3 is installed, the boss 113 and the opening can be aligned when the back plate 1 is formed by punching, the first cover plate 3 is punched together, the boss 113 is riveted in the opening, and the boss 113 and the opening are connected by riveting, so that the first cover plate 3 is fixed on the first step surface 111, and the process is simple and the connection is firm. Meanwhile, in order to enable the connection of the two parts to be more stable, a plurality of holes and convex columns 113 can be correspondingly arranged at intervals along the length direction of the first cover plate 3 and the first step surface 111, and the holes and the convex columns 113 are riveted to strengthen the connection firmness of the first cover plate 3 and the first step surface 111. Of course, the first cover plate 3 may be fixedly connected to the first step surface 111 by riveting or bonding, or the like, the protruding columns 113 may be disposed on the first cover plate 3, and the openings are correspondingly disposed on the first step surface 111.

When the first cover plate 3 is installed, for convenient installation, an installation gap is formed between one end of the first step surface 111, which faces away from the first groove 14, and the first cover plate 3, and when an operator or machine equipment aligns the first cover plate 3 with the first step surface 111, more installation space is formed, and the installation gap can be determined according to practical conditions.

For example, since the extending directions of the second groove 16 and the first groove 14 intersect, the plurality of light bars 21 may also partially pass over the second groove 16, resulting in suspending portions thereof. Therefore, in this embodiment, the second cover plate 4 is disposed, and the second cover plate 4 is disposed above the second groove 16 and abuts against the light bars 21 passing above the second groove 16 to support the light bars 21, and the portion of the second cover plate 4 supporting the light bars 21 is flush with the inner bottom surface 11 of the back plate 1, so as to ensure that all the light bars 21 are on the same plane.

In this embodiment, since the second groove 16 is perpendicular to the first groove 14, and the light bar 21 extends along the length direction of the first groove 14, that is, there is a case where the light bar 21 crosses the second groove 16, although the width of the second groove 16 is shorter than the length of the light bar 21, the light bar 21 is also caused to be partially suspended. Therefore, through setting up second apron 4 can cooperate with first apron 3, guarantees that lamp strip 21 does not have the position to be in unsettled state, and all lamp strips 21 state are unanimous, avoids appearing showing bad.

Similarly, the second groove 16 includes a second bottom wall 161 and second side walls 162 located at two sides of the second bottom wall 161, one end of the second side wall 162 is connected to the second bottom wall 161, and the other end of the second side wall 162 is connected to the inner bottom surface 11 of the back plate 1, so as to jointly enclose the second groove 16. The connection between the inner bottom surface 11 of the back plate 1 and the second side wall 162 is recessed toward the first bottom wall 141 to form the second step surface 112, and it is understood that two second side walls 162 on two sides and the inner bottom surface 11 of the back plate 1 are formed with two second step surfaces 112, the two second step surfaces 112 are respectively located on two sides of the width direction above the second groove 16, and the second cover plate 4 is fixed on the two second step surfaces 112 to cover the second groove 16 in the width direction of the second groove 16. Meanwhile, the second step surface 112 is formed by recessing the inner bottom surface 11 of the back plate 1, and the second step surface 112 is lower than the inner bottom surface 11 of the back plate 1, so that the second cover plate 4 can be flush with the inner bottom surface 11 of the back plate 1 after being fixed on the second step surface 112, and does not protrude from the inner bottom surface 11 of the back plate 1. In addition, as the second cover plate 4 is fixedly connected with the two second step surfaces 112, the two sides of the notch of the second groove 16 are stressed, the second bottom wall 161, the second side wall 162 and the second cover plate 4 are enclosed to form a closed hollow pipe structure, the strength of the second reinforcing ribs 15 and the backboard 1 is further improved, materials are not used for reinforcing in a large area, and the overall cost is reduced.

Correspondingly, the second cover plate 4 and the second step surface 112 can also be connected by riveting like the first cover plate 3 and the first step surface 111, and an installation gap is also formed between one end of the second step surface 112, which is far away from the second groove 16, and the second cover plate 4, so that the process is simple and the connection is firm, and the connection mode of the first cover plate 3 and the second step surface 112 can be specifically referred to.

Fig. 5 is a cross-sectional view taken along the direction A-A in fig. 4. Fig. 6 is a partial enlarged view at D in fig. 5.

As described above, with continued reference to fig. 5 and 6, the length direction of the first groove 14 is perpendicular to the length direction of the second groove 16, and further, the first groove 14 and the second groove 16 intersect, and at the intersection, the first cover plate 3 and the second cover plate 4 may interfere. Therefore, one of the first cover plate 3 and the second cover plate 4 is dislocated in the up-down direction at the intersection to form the escape groove 31, and the other of the first cover plate 3 and the second cover plate 4 is penetrated out of the escape groove 31, thereby avoiding the interference of the first cover plate 3 and the second cover plate 4 at the intersection. In this embodiment, the first cover plate 3 protrudes upward at the intersection to form the avoidance groove 31 above the second cover plate 4, in other embodiments, the first cover plate 3 protrudes downward at the intersection to form the avoidance groove 31 below the second cover plate 4, or the second cover plate 4 protrudes upward or downward at the intersection to form the avoidance groove 31, so that the two parts are misplaced at the intersection to avoid interference, or one of the first cover plate 3 and the second cover plate 4 forms a breakpoint at the intersection and is separated into two small sections by the other part.

Example two

The embodiment also provides a display device, which comprises a backlight module and a display panel which are sequentially arranged along the emergent direction of the light rays emitted by the light bar 21. It is understood that the display device further includes other structures, such as a housing, etc., which are not described herein. The display device has the backlight module in the above embodiment, so that the display device has all the beneficial effects of the backlight module, and is not described herein.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are 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 one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. 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 the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model, which is therefore intended to be covered by the appended claims and their equivalents.

Claims (10)

1. A backlight module, comprising:

the backboard is provided with an inner bottom surface and an outer bottom surface which are opposite, part of the inner bottom surface of the backboard protrudes towards the outer bottom surface to form a first reinforcing rib, and a first groove is formed between the first reinforcing rib and the inner bottom surface of the backboard;

the lamp panel comprises a plurality of lamp strips which are distributed at intervals, part of the lamp strips are arranged on the inner bottom surface of the backboard, and at least one lamp strip is positioned above the first groove;

the first cover plate is arranged above the first groove in a covering mode and is abutted to the lamp strip above the first groove to support the lamp strip, and the part of the first cover plate, which supports the lamp strip, is flush with the inner bottom surface of the backboard.

2. The backlight module according to claim 1, wherein the light bar and the first cover plate each extend along a length direction of the first groove, and the first cover plate covers the first groove in a width direction of the first groove, and the first cover plate covers the light bar located above the first groove in the length direction of the first groove.

3. The backlight module according to claim 2, wherein the first groove comprises a first bottom wall and first side walls positioned on two sides of the first bottom wall, one end of each first side wall is connected with the first bottom wall, the other end of each first side wall is connected with the inner bottom surface of the back plate, the connection part between the inner bottom surface of the back plate and the first side walls is recessed towards the first bottom wall to form a first step surface, and the first cover plate is fixed on the two first step surfaces to cover the first groove in the width direction of the first groove.

4. A backlight module according to claim 3, wherein an installation gap is provided between an end of the first step surface facing away from the first groove and the first cover plate.

5. A backlight module according to claim 3, wherein the first step surface is provided with a protruding column, an opening is provided on the first cover plate corresponding to the protruding column, and the protruding column is riveted in the opening, so that the first cover plate is fixed on the first step surface.

6. A backlight module according to claim 1, wherein a portion of the inner bottom surface of the back plate protrudes toward the outer bottom surface to form a second reinforcing rib, the second reinforcing rib forming a second groove with the inner bottom surface of the back plate, the second groove intersecting with the first groove in a longitudinal direction.

7. The backlight module of claim 6, further comprising a second cover plate, wherein the second cover plate is covered above the second groove and is abutted with the light bar passing through the top of the second groove to support the light bar, and a part of the second cover plate supporting the light bar is level with the inner bottom surface of the back plate.

8. The backlight module according to claim 7, wherein the second groove comprises a second bottom wall and two second side walls positioned at two sides of the second bottom wall, one end of the second side wall is connected with the second bottom wall, the other end of the second side wall is connected with the inner bottom surface of the back plate, the connection part of the inner bottom surface of the back plate and the second side wall is recessed towards the second bottom wall to form a second step surface, and the second cover plate is fixed on the two second step surfaces to cover the second groove in the width direction of the second groove.

9. The backlight module according to claim 7, wherein a length direction of the first groove is perpendicular to a length direction of the second groove, and the first groove and the second groove intersect;

one of the first cover plate and the second cover plate is staggered in the vertical direction at the intersection to form an avoidance groove, and the other one of the first cover plate and the second cover plate penetrates out of the avoidance groove.

10. A display device comprising the backlight module and the display panel according to any one of claims 1 to 9, which are sequentially arranged along an emission direction of light emitted from the light bar.