CN116704908A - Backlight module, display device and preparation method of display device - Google Patents

Abstract

The application discloses a backlight module, a display device and a preparation method of the display device, wherein the backlight module comprises a lamp panel assembly, a bottom plate and a frame, the lamp panel assembly is fixed on the bottom plate, the frame comprises a plurality of through holes, and the through holes are arranged on the side wall of the frame; the bottom plate is provided with a plurality of mounting holes corresponding to the through holes, and the frame and the bottom plate are detachably connected through the through holes and the mounting holes; wherein the plurality of through holes are on different horizontal lines. Through offer a plurality of through-holes that are in on different horizon on the frame for when adopting different through-holes to connect frame and bottom plate, the bottom plate is relative changeable for the position of frame, thereby solves the problem that the use flexibility of backlight unit is poor and with high costs among the prior art.

Description

Backlight module, display device and preparation method of display device

Technical Field

The application relates to the technical field of display, in particular to a backlight module, a display device and a preparation method of the display device.

Background

In the related art, the assembly in the backlight module needs to be performed sequentially, and the lamp panel assembly time is long, so that the whole assembly period of the backlight module is long. Meanwhile, the existing back plate of the backlight module has the problem of poor use flexibility, different dies are needed for the back plates with different sizes, and the manufacturing cost is high.

Disclosure of Invention

In view of the above, the present application provides a backlight module, a display device and a method for manufacturing the display device, so as to solve the problems of long assembly period, poor flexibility and high cost of the backlight module in the prior art.

In order to solve the technical problems, the first technical scheme provided by the application is as follows: the backlight module comprises a lamp panel assembly, a bottom plate and a frame, wherein the lamp panel assembly is fixed on the bottom plate, and the frame comprises a plurality of through holes and is arranged on the side wall of the frame; the bottom plate is provided with a plurality of mounting holes corresponding to the through holes, and the frame and the bottom plate are detachably connected through the through holes and the mounting holes; wherein, a plurality of through holes are positioned on different horizontal lines.

Optionally, the plurality of through holes are arranged in a stepped or arc shape, so that when different through holes are used for connecting the frame and the bottom plate, the position of the bottom plate relative to the frame is relatively variable.

Optionally, the frame includes: the first bottom wall and the first side walls are connected with each other, the through holes are arranged on at least one group of the first side walls oppositely, and the through holes are symmetrically arranged on at least one group of the first side walls oppositely.

Optionally, a plurality of through holes are disposed at the middle position and/or the two end positions of at least one group of the first side walls which are disposed oppositely.

Optionally, the plurality of through holes are arranged in a dislocation manner in a horizontal direction or a vertical direction at the middle position and/or the two end positions on the same first side wall.

Optionally, the number of the through holes is at least 4 on the same first side wall.

Optionally, each first side wall is provided with at least one supporting portion, one end of the supporting portion is connected to the first side wall, and the other end of the supporting portion is bent towards the inside of the frame, so as to support the diffusion plate and the optical film which are arranged on one side of the frame away from the bottom plate.

Optionally, the bottom plate includes a second bottom wall and a second side wall, and the second bottom wall is detachably connected with the back plate of the lamp panel assembly; the second side wall is provided with a plurality of mounting holes; the mounting hole is detachably connected with the through hole; the shape, the size, the setting positions and the number of the plurality of the mounting holes are completely consistent with those of the plurality of the through holes.

In order to solve the technical problems, a second technical scheme provided by the application is as follows: the display device comprises a display panel and a backlight module, wherein the backlight module is electrically connected with the display panel and is used for providing a light source for the display panel; the backlight module is any one of the backlight modules.

In order to solve the technical problems, a third technical scheme provided by the application is as follows: the preparation method of the display device is provided, the display device is the display device, and the preparation method comprises the following steps: assembling the optical diaphragm, the rubber frame and the transparent protective layer; simultaneously, a plurality of lamp panels are assembled on a plurality of back plates in a one-to-one correspondence manner respectively, and the back plates are spliced to form a plurality of lamp panel assemblies; detachably connecting one side, far away from the lamp panel, of the spliced back plates to a bottom plate; the base plate and the frame are detachably connected through a plurality of mounting holes on the base plate and a plurality of through holes on the frame, so that when different through holes are adopted to connect the frame and the base plate, the position of the base plate relative to the frame is relatively variable.

The application has the beneficial effects that: compared with the prior art, the backlight module provided by the application comprises the lamp panel assembly, the bottom plate and the frame, wherein the lamp panel assembly is fixed on the bottom plate, the frame comprises a plurality of through holes, and the frame and the bottom plate are detachably connected through the plurality of through holes; wherein the plurality of through holes are on different horizontal lines. Through offer a plurality of through-holes that are in on different horizon on the frame for when adopting different through-holes to connect frame and bottom plate, the bottom plate is relative changeable for the position of frame, thereby solves the problem that the use flexibility of backlight unit is poor and with high costs among the prior art.

Drawings

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

Fig. 1 is a schematic diagram of an exploded structure of a display device according to a first embodiment of the present application;

fig. 2 is a schematic cross-sectional view of a backlight module according to a first embodiment of the application;

FIG. 3 is a schematic view illustrating a structure of a frame according to a first embodiment of the present application;

fig. 4 is a schematic structural diagram of a frame according to a second embodiment of the present application;

FIG. 5 is a schematic view of a base plate according to a first embodiment of the present application;

fig. 6 is a schematic structural diagram of a lamp panel assembly according to a first embodiment of the present application;

fig. 7 is a schematic diagram of a display device according to a first embodiment of the present application;

fig. 8 is a flowchart of a method for manufacturing a display device according to an embodiment of the application;

reference numerals illustrate:

10-backlight module, 20-display panel, 2-foam glue layer, 3-glue frame, 4-optical film, 5-diffusion plate, 6-frame, 601-supporting part, 602-through hole, 61-first bottom wall, 62-first side wall, 621-intermediate position, 622-two end position, 7-lamp panel assembly, 71-lamp panel component, 711-lamp panel, 7111-luminous component, 712-fixing component, 713-back plate, 8-bottom plate, 81-second bottom wall, 811-connecting frame, 812-connecting hole, 82-second side wall, 821-mounting hole, 100-display device.

Detailed Description

The following description of the embodiments of the present application 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 application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms "first," "second," and "first," herein, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "first", "second", or "first" may include at least one such feature, either explicitly or implicitly. All directional indications (such as up, down, left, right, front, back … …) in embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular gesture (as shown in the drawings), and if the particular gesture changes, the directional indication changes accordingly. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, display device, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, display device, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The inventors found that: the MiniLED and the Micro LED are used as a display technology with great development prospect, and have wide application growth potential in the display field; for backlight applications, miniLED & Micro LEDs are typically direct-lit designs, which allow for smaller area dimming through a large number of packages.

However, the existing MiniLED & Micro LEDs mainly comprise a single lamp panel, part of the MiniLED & Micro LEDs mainly comprise double lamp panels which are spliced, and a plurality of lamp panels are spliced. Meanwhile, the existing backlight module is poor in flexibility, and for products with different LED numbers in the same size, the distance between the LEDs and the diffusion plate is also different, so that the back plate of each product with different LED numbers needs to be subjected to mold opening design again, the manufacturing period is long, and the cost is high.

In order to solve the above problems, the present application provides a backlight module, a display device and a method for manufacturing the display device.

Referring to fig. 1 and fig. 2, fig. 1 is an exploded view of a display device according to an embodiment of the application, and fig. 2 is a cross-sectional view of a backlight module according to an embodiment of the application.

The backlight module 10 provided by the application comprises a frame 6, a lamp panel assembly 7 and a bottom plate 8, wherein the lamp panel assembly 7 is fixed on the bottom plate 8, and particularly a back plate 713 of the lamp panel assembly 7 is fixed on the bottom plate 8. In this embodiment, the lamp panel assembly 7 is fixed on the bottom plate 8, and then the bottom plate 8 is detachably connected with the frame 6.

Specifically, the frame 6 includes a plurality of through holes 602, and the plurality of through holes 602 are formed on the side wall of the frame 6. The base plate 8 has a plurality of mounting holes 821 corresponding to the plurality of through holes 602, and the frame 6 and the base plate 8 are detachably connected through the plurality of through holes 602 and the plurality of mounting holes 821; wherein the plurality of vias 602 are on different horizontal lines.

In the first embodiment, the plurality of through holes 602 are arranged in a stepped or arc shape, so that the position of the bottom plate 8 relative to the frame 6 is relatively variable when the frame 6 and the bottom plate 8 are connected by using different through holes 602.

Specifically, the specific arrangement manner of the plurality of stepped through holes 602 may be: the plurality of through holes 602 gradually increase in height from one end to the other end of the bezel 6 in the horizontal direction or the vertical direction. The specific arrangement manner of the plurality of through holes 602 in the arc arrangement may be: the plurality of through holes 602 are arranged in an arc-shaped manner from one end to the other end of the bezel 6 in the horizontal direction or the vertical direction. That is, the plurality of through holes 602 at the same position may be connected to take an arc shape.

Referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a frame provided in a first embodiment of the present application, and fig. 4 is a schematic structural diagram of a frame provided in a second embodiment of the present application.

Embodiment one:

as shown in fig. 3, the frame 6 includes a first bottom wall 61 and a plurality of first side walls 62 connected to each other, the plurality of through holes 602 are disposed on at least one set of first side walls 62 disposed opposite to each other, and the plurality of through holes 602 are disposed symmetrically on at least one set of first side walls 62 disposed opposite to each other.

Specifically, the first bottom wall 61 is connected to the plurality of first side walls 62, and the plurality of first side walls 62 are connected end to end, in this embodiment, the plurality of first side walls 62 are specifically four first side walls 62, and the four first side walls 62 are connected to the first bottom wall 61 to form the frame 6. The plurality of through holes 602 are formed on at least one set of first side walls 62 disposed opposite to each other, for example, the through holes 602 may be symmetrically formed on two first side walls 62 disposed opposite to each other, or may be formed on all four first side walls 62. The number, shape and arrangement of the through holes 602 on each pair of the opposite first side walls 62 are identical, so that the through holes 602 on each pair of the opposite first side walls 62 are completely symmetrical, and the positions of the bottom plate 8 are balanced when the bottom plate 8 is connected through different frames 6.

In the first embodiment, a plurality of through holes 602 may be provided at the middle position 621 and/or the both end positions 622 of each first sidewall 62. That is, the through holes 602 may be provided only at the left and right ends of each first sidewall 62, or may be provided at the middle position 621 of the first sidewall 62, so that the through holes 602 provided at each first sidewall 62 are arranged in a left, middle, and right manner.

Meanwhile, at the middle position 621 and/or the two end positions 622 on the same first side wall 62, the plurality of through holes 602 are arranged in a staggered manner in the horizontal direction or the vertical direction. That is, the plurality of through holes 602 at any one of the left, middle and right positions on each of the first side walls 62 are not on the same horizontal line or the same vertical line in either the horizontal direction or the vertical direction. The plurality of through holes 602 are arranged in a staggered manner in a horizontal direction and a vertical direction, so that the position of the bottom plate 8 with respect to the frame 6 is adjustable and changeable in the Z-axis when the frame 6 and the bottom plate 8 are connected by different through holes 602. Therefore, when the bottom plate 8 is connected with products with different LED numbers, the position of the bottom plate 8 relative to the frame 6 in the z-axis direction can be adjusted only by adjusting the positions of the through holes 602 connected with the frame 6 and the bottom plate 8, a new structure die is not needed, the development period is saved, and the product cost is reduced.

In the first embodiment, the number of the through holes 602 is at least 4 on the same first sidewall 62. That is, at the middle position 621 and/or the two end positions 622 of the same first side wall 62, the number of the through holes 602 is at least 4 to meet the position adjustment requirements of the bottom plate 8 and the frame 6. The upper limit of the number of through holes 602 is not limited. It will be appreciated that the greater the number of through holes 602, the greater the space for adjusting the positions of the bottom plate 8 and the frame 6, and the higher the compatibility of products with different numbers of LEDs, so that more development cycles and product costs can be saved. However, the number of the through holes 602 is based on the connection stability of the frame 6 and the bottom plate 8 and the maximum stress condition of the frame 6, and it should be noted that the region of the frame 6 requiring a larger stress is generally not suitable for the case of punching, and the specific punching mode may be set according to the need, which is not limited in the present application.

In the first embodiment, each first side wall 62 has at least one supporting portion 601, one end of the supporting portion 601 is connected to the first side wall 62, and the other end is bent towards the inside of the frame 6, so that the supporting portion 601 supports the diffusion plate 5 and the optical film 4 disposed on the side of the frame 6 away from the bottom plate 8. In this embodiment, at least one supporting portion 601 is disposed on each first side wall 62, that is, one supporting portion 601 may be disposed on each of the four first side walls 62, so as to ensure the supporting stability of the supporting portion 601 on the diffusion plate 5 and the optical film 4 disposed on the side of the frame 6 away from the bottom plate 8.

Embodiment two:

as shown in fig. 4, a plurality of the support portions 601 may be provided for each of the first side walls 62, and preferably, 2 to 4 support portions are provided. In addition, the support portion 601 may be fixed to each of the first side walls 62 in a separate structure, for example, fixed to the first side walls 62 by means of screws, gluing, or the like. The supporting portion 601 may be formed by cutting the first side wall 62 to form a bendable polygon, and bending the polygon toward the inside of the frame 6, so as to form a supporting portion 601 with a supporting function, that is, the supporting portion 601 and the frame 6 may be an integral structure. The shape of the support portion 601 may be rectangular, trapezoidal, or the like, and may be specifically set as needed, which is not limited by the present application.

In the first embodiment and the second embodiment, the intervals between two adjacent through holes 602 may be equal or unequal, and the shapes of the through holes 602 may be rectangular, round hole, diamond, trapezoid, rounded rectangle, etc., and the application is not limited to the shapes of the through holes 602. It will be appreciated that when the connecting member (not shown) connecting the frame 6 and the bottom plate 8 is a screw, it is convenient to form the through hole 602 into a circular hole. When the connecting piece connecting the frame 6 and the bottom plate 8 is a pin, the shape of the through hole 602 may be any shape, as long as the pin is matched with the shape and size of the through hole 602, and the connection requirement of the pin and the through hole 602 can be satisfied.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a base plate according to an embodiment of the application.

In the first embodiment, the bottom plate 8 may include a second bottom wall 81 and a second side wall 82, where the second bottom wall 81 is detachably connected to the back plate 713 of the lamp panel assembly 7; the second side wall 82 has a plurality of mounting holes 821; as shown in fig. 2, the mounting hole 821 is detachably connected to the through hole 602.

Specifically, the plurality of mounting holes 821 on the second side wall 82 are connected with the plurality of through holes 602 on the first side wall 62 in a matching manner, so as to connect the frame 6 and the bottom plate 8, so it can be understood that the shape, the size, the arrangement position, the spacing and the number of the plurality of mounting holes 821 are completely consistent with the plurality of through holes 602, so that the frame 6 and the bottom plate 8 can be mounted in a matching manner. However, the plurality of mounting holes 821 may not be arranged in a stepped or arc shape, i.e., the plurality of mounting holes 821 may be opened on the same horizontal line. Whether or not the plurality of mounting holes 821 are arranged in a stepped or arcuate shape, the positional adjustable connection relationship between the rim 6 and the bottom plate 8 is not affected.

In the first embodiment, the second bottom wall 81 of the bottom plate 8 is further provided with a connection frame 811 and a connection hole 812, the connection frame 811 can be obtained by cutting the second bottom wall 81, and the connection frame 811 and the connection hole 812 are used for connecting the back plate 713 of the lamp panel assembly 7.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a lamp panel assembly according to an embodiment of the application.

In the first embodiment, the lamp panel assembly 7 includes a plurality of lamp panel members 71, and each lamp panel member 71 includes a lamp panel 711, a back plate 713, and a fixing member 712 connecting the lamp panel 711 and the back plate 713. The lamp plate 711 may be provided with a plurality of light emitting members 7111 for providing a light source, for example, a plurality of minileds or Micro LEDs. The light emitting member 7111 is disposed on the surface of the lamp plate 711 remote from the back plate 713, i.e., the light emitting member 7111 and the back plate 713 are connected to opposite surfaces of the lamp plate 711.

As shown in fig. 4, the back plate 713 is arranged on the connection frame 811, and the back plate 713 is detachably connected to the connection hole 812 by the fixing member 712, so that the back plate 713 is spliced and arranged on the bottom plate 8.

Specifically, the number of the lamp panel members 71 may be reasonably set according to the size of the second bottom wall 81 of the frame 6, and in this embodiment, the number of the lamp panel members 71 is 9, and the lamp panel members are disposed on the second bottom wall 81 in a manner of 3 rows and 3 columns. As shown in fig. 5 and 6, after the light emitting element 7111 and the back plate 713 are fixed to the lamp plate 711, the back plate 713 is fixed to the second bottom wall 81 of the bottom plate 8. Wherein the fixing member 712 may be a screw, a bolt, or the like, and the back plate 713, the light plate 711, and the bottom plate 8 are respectively connected by a detachable connection manner, so that the assembly complexity of the light plate assembly 7 can be simplified. Meanwhile, the back plate 713 can effectively protect components on the back surface of the lamp plate 711 and avoid short circuit or component damage caused by water vapor or other reasons. The lamp plate 711 can be detached and fixed on the corresponding back plate 713, the back plate 713 is arranged and combined, the assembly and the splicing of the lamp plate 711 can be realized, if poor splicing occurs, only the corresponding abnormal back plate 713 is needed to be replaced, the whole parts are not needed to be replaced, and the assembly is more flexible. Compared with the integral back plate 713 and the lamp plate 711, the assembled back plate 713 and the lamp plate 711 have lower production cost and more convenient transportation.

Referring to fig. 7, fig. 7 is a schematic diagram of a display device according to an embodiment of the application.

The present application further provides a display device 100, as shown in fig. 1 and 7, the display device 100 includes a display panel 20 and a backlight module 10, and the backlight module 10 is electrically connected to the display panel 20 and is used for providing a light source for the display panel 20. The display panel 20 is disposed above the backlight module 10, and the display panel 20 may be a display panel using minileds or Micro LEDs. The backlight module 10 is any one of the above backlight modules, and the specific structure is referred to the above description, and will not be repeated here.

Referring to fig. 8, fig. 8 is a flowchart illustrating a method for manufacturing a display device according to an embodiment of the application.

The present application also provides a method for manufacturing the display device 100, which may include the steps of:

s1: assembling the optical diaphragm, the rubber frame and the transparent protective layer; meanwhile, the plurality of lamp panels are assembled on the plurality of back plates in a one-to-one correspondence mode respectively, and the plurality of back plates are spliced to form a plurality of lamp panel assemblies.

Specifically, in this embodiment, since the light plate 711 and the back plate 713 are separately mounted in one-to-one correspondence, when the display device 100 is assembled, the light plate 711 may not be assembled first, and since the light plate 711 is detachably connected to the bottom plate 8, when the optical film 4, the adhesive frame 3 and the OC (transparent protective layer, not shown) are assembled, the light plate 711 is synchronously assembled on the back plate 713, the back plate 713 is assembled on the bottom plate 8, and finally, the bottom plate 8 is detachably connected to the frame 6, so that the assembly time of the light plate 711 is saved, and the production efficiency is improved. The back plate 713 realizes back disassembly and assembly, other components can be assembled while the lamp plate 711 is assembled, production time is saved, and assembly efficiency is improved. In the conventional backlight module 10 assembly method: the lamp panel member 71, the optical film 4, the adhesive frame 3, OC, and the front frame are assembled in this order, and the lamp panel member 71 is assembled with a long time, so that the entire assembly cycle of the display panel 20 is long. If the conventional backlight module 10 needs to adjust or replace the lamp plate 711, the OC, the plastic frame 3, the optical film 4, etc. need to be lifted, which takes a long time and is easy to damage other components, and the materials cannot be reused, so that the cost is high. In the application, when the lamp plate 711 needs to be adjusted or replaced, the bottom plate 8 is directly detached from the lower part of the frame 6, thereby improving the utilization rate of raw materials and saving working hours.

In addition, as shown in fig. 1 and 2, a display panel 20 is disposed on a side of the plastic frame 3 away from the optical film 4, and the display panel 20 and the plastic frame 3 may be fixed by a foam adhesive layer 2.

S2: and one side, far away from the lamp panel, of the spliced back plates is detachably connected to the bottom plate.

Specifically, as described above, after the back plate 713 is mounted on the side of the lamp plate 711 away from the light emitting member 7111, the side of the back plate 713 away from the lamp plate 711 is detachably fixed to the bottom plate 8 by screws, bolts, or the like. The detachable connection mode of the back plate 713 and the bottom plate 8 ensures that the back plate 713 and the bottom plate 8 can be conveniently detached and replaced no matter the back plate 713 is damaged or the bottom plate 8 is partially damaged, and the backlight module 10 is not required to be detached and replaced integrally, thereby saving labor hour and cost.

S3: the base plate and the frame are detachably connected through a plurality of mounting holes in the base plate and a plurality of through holes in the frame, so that when the frame and the base plate are connected by adopting different through holes, the position of the base plate relative to the frame is relatively variable.

Specifically, after the lamp panel assembly 7 and the base plate 8 are mounted, the frame 6 and the base plate 8 can be mounted. In this embodiment, when the frame 6 and the bottom plate 8 are installed, the bottom plate 8 is integrally embedded in the frame 6, the second side wall 82 of the bottom plate 8 is placed towards the inside of the first side wall 62 of the frame 6, the mounting holes 821 on the second side wall 82 are aligned with the corresponding through holes 602 on the first side wall 62, and then the frame 6 and the bottom plate 8 are connected by means of screws or bolts or the like. When the bezel 6 and the base plate 8 are connected by using different through holes 602 and mounting holes 821, the Z-axis position of the base plate 8 with respect to the bezel 6 also changes, so that the position of the lamp panel member 71 with respect to the diffusion plate 5 also changes. The advantages are that: when developing the traditional product, for the product with different LED numbers in the same size, the distance from the LED to the diffusion plate 5 is also different, so the back plate 713 needs to be subjected to mold opening design again, the development period is long and the cost is high.

The backlight module comprises a lamp panel assembly, a bottom plate and a frame, wherein the lamp panel assembly is fixed on the bottom plate; wherein the plurality of through holes are on different horizontal lines. Through offer a plurality of through-holes that are in on different horizon on the frame for when adopting different through-holes to connect frame and bottom plate, the bottom plate is relative changeable for the position of frame, thereby solves the problem that the use flexibility of backlight unit is poor and with high costs among the prior art.

The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.

Claims (10)

1. The utility model provides a backlight unit, includes lamp plate subassembly, bottom plate and frame, the lamp plate subassembly is fixed on the bottom plate, its characterized in that, the frame includes:

the through holes are formed in the side wall of the frame; the bottom plate is provided with a plurality of mounting holes corresponding to the through holes, and the frame and the bottom plate are detachably connected through the through holes and the mounting holes;

wherein, a plurality of through holes are positioned on different horizontal lines.

2. A backlight module according to claim 1, wherein a plurality of the through holes are arranged in a stepwise or arc shape, so that the position of the bottom plate relative to the frame is relatively variable when different through holes are used to connect the frame and the bottom plate.

3. A backlight module according to claim 1 or 2, wherein the bezel comprises: the first bottom wall and the first side walls are connected with each other, the through holes are arranged on at least one group of the first side walls oppositely, and the through holes are symmetrically arranged on at least one group of the first side walls oppositely.

4. A backlight module according to claim 3, wherein a plurality of the through holes are provided at a middle position and/or at both end positions of at least one of the first side walls which are disposed opposite to each other.

5. A backlight module according to claim 4, wherein,

and the plurality of through holes are arranged in a staggered manner in the horizontal direction or the vertical direction at the middle position and/or the two end positions on the same first side wall.

6. A backlight module according to claim 3, wherein,

the number of the through holes is at least 4 on the same first side wall.

7. A backlight module according to claim 3, wherein each of the first side walls has at least one supporting portion, one end of the supporting portion is connected to the first side wall, and the other end of the supporting portion is bent toward the inside of the frame to support the diffusion plate and the optical film disposed on a side of the frame away from the bottom plate.

8. A backlight module according to claim 1, wherein the chassis comprises:

the second bottom wall is detachably connected with the backboard of the lamp panel assembly;

a second side wall having a plurality of the mounting holes; the mounting hole is detachably connected with the through hole;

the shape, the size, the setting positions and the number of the plurality of the mounting holes are completely consistent with those of the plurality of the through holes.

9. A display device, comprising:

a display panel;

the backlight module is electrically connected with the display panel and used for providing a light source for the display panel; the backlight module is a backlight module according to any one of claims 1 to 8.

10. A method for manufacturing a display device according to claim 9, characterized by comprising:

assembling the optical diaphragm, the rubber frame and the transparent protective layer; simultaneously, a plurality of lamp panels are assembled on a plurality of back plates in a one-to-one correspondence manner respectively, and the back plates are spliced to form a plurality of lamp panel assemblies;

detachably connecting one side, far away from the lamp panel, of the spliced back plates to a bottom plate;

the base plate and the frame are detachably connected through a plurality of mounting holes on the base plate and a plurality of through holes on the frame, so that when different through holes are adopted to connect the frame and the base plate, the position of the base plate relative to the frame is relatively variable.