CN218003883U

CN218003883U - Backlight module and display device

Info

Publication number: CN218003883U
Application number: CN202222255798.7U
Authority: CN
Inventors: 张小明
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Priority date: 2022-08-24
Filing date: 2022-08-24
Publication date: 2022-12-09
Anticipated expiration: 2032-08-24

Abstract

The utility model discloses a backlight module and display device relates to display device technical field. The backlight module comprises a back plate, a reflector plate and at least one lamp strip group, wherein the reflector plate is arranged on the back plate, the lamp strip group is arranged on a reflecting surface of the reflector plate, which is far away from the back plate, and comprises a plurality of lamp strips, the lamp strips are sequentially arranged at intervals and in parallel along a first direction, each lamp strip extends along a second direction perpendicular to the first direction, and the lamp strips are sequentially provided with a plurality of lamp beads at intervals along the second direction; the distance between any two adjacent lamp beads along the second direction is a first distance, the distance between any two adjacent lamp strips along the first direction is a second distance, and the ratio of the first distance to the second distance is (1; the production automation degree of the backlight module is favorably improved, and the problem that when the lamp strip is arranged on the reflecting surface of the reflector plate, a shadow is easily formed at the PCB of the lamp strip is solved.

Description

Backlight module and display device

Technical Field

The utility model relates to a display device technical field especially relates to a backlight module and display device.

Background

This section provides background information related to the present invention only and is not necessarily prior art.

The backlight module is common equipment applied to a liquid crystal display screen and comprises components such as a back plate, a light bar and a reflector plate. When the PCB of the lamp strip is arranged on the reflecting surface of the reflecting sheet, a shadow is easily formed at the position of the PCB, so that the brightness uniformity of the backlight module is influenced. Therefore, at present, in order to make the backlight module have uniform brightness, the PCB of the light bar is usually disposed between the reflector and the back plate. However, the arrangement of the light bar PCB and the reflector plate requires more manual intervention during actual production and manufacturing, and the automation degree is not high.

How to improve the production automation degree of the backlight module and ensure the brightness uniformity of the backlight module is an urgent problem to be solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving when the PCB board of lamp strip is arranged in the plane of reflection of reflector plate on, PCB board department forms the problem of shadow easily to when making the PCB board arrange the plane of reflection of reflector plate in, backlight unit's luminance is still comparatively even, thereby makes things convenient for in backlight unit's processing, improves backlight unit's production degree of automation. The purpose is realized by the following technical scheme:

the utility model provides a first aspect provides a backlight module, including backplate, reflector plate and at least one lamp strip group, the reflector plate sets up on the backplate, lamp strip group sets up on the reflector plate deviates from the plane of reflection of backplate, lamp strip group includes many lamp strips, many lamp strips along first direction interval in proper order and set up side by side, every lamp strip extends along the second direction perpendicular to first direction, every lamp strip along the second direction interval in proper order have a plurality of lamp pearls; the distance between any two adjacent lamp beads along the second direction is a first distance, the distance between any two adjacent lamp strips along the first direction is a second distance, and the ratio of the first distance to the second distance is (1.5) to (1.5.

According to the utility model discloses a backlight unit, the plane of reflection of reflector plate is the side that deviates from the backplate, sets up the lamp strip on the plane of reflection of reflector plate, and when the production adds man-hour, can set up the reflector plate earlier according to range upon range of order, sets up the lamp strip on the plane of reflection of reflector plate again. In the course of working, the possibility that lamp strip and reflector plate interfere each other reduces, is favorable to automatic operation more. The first distance between adjacent lamp beads on the lamp strips and the second distance between adjacent lamp strips are between (1; the interval between lamp pearl and the lamp pearl is less, can increase the luminance between the lamp pearl, has also increased the luminance of the PCB board department of lamp strip for the luminance of PCB board department and other positions is unanimous or close unanimous, has solved the problem that PCB board department produced the shadow, makes the lamp strip set up when the reflector panel's plane of reflection, and backlight unit's luminance is still comparatively even.

In addition, according to the utility model discloses, can also have following additional technical characterstic:

in some embodiments of the present invention, the lamp bead is peripheral, and a plurality of first light absorption points are provided on the reflecting surface of the reflector plate in a dispersed manner.

In some embodiments of the present invention, the reflective sheet is disposed on the reflective surface between the adjacent light bars, and a plurality of the first light absorption points are disposed in a dispersed manner corresponding to the light beads;

and/or the first light absorption point is arranged in a fan-shaped area of the reflecting surface on one or two sides of the lamp bead in the first direction.

The utility model discloses an in some embodiments, the density that sets up of first light absorbing point is from being close to the position of lamp pearl is to keeping away from the position of lamp pearl is the trend that reduces gradually.

In some embodiments of the present invention, the first light absorbing dots are silkscreen dots;

and/or the first light absorption point is a circular point.

In some embodiments of the present invention, along the first direction, a second light absorption point is disposed on a reflective surface of the reflective sheet between the adjacent light bars.

In some embodiments of the present invention, the second light absorbing dots are silk-screen dots;

and/or the second light absorption points are all round points.

In some embodiments of the present invention, the inner side of the circumferential edge of the reflector plate is provided with a seam line, the seam line includes a connecting portion and a discontinuous portion, the connecting portion and the discontinuous portion are arranged alternately along the extending direction of the seam line, the connecting portion and the reflector plate on both sides of the seam line are connected into a whole, and the reflector plate is arranged at the discontinuous portion.

In some embodiments of the present invention, a ratio between a length of the discontinuity and a length of the connecting portion in a direction of extension of the seam line is greater than or equal to 8.

The second aspect of the utility model provides a display device, include the utility model provides a backlight unit.

According to the utility model discloses a display device, include the utility model provides a backlight unit, so at least have the utility model provides a backlight unit's beneficial effect.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated with like reference numerals throughout the drawings. In the drawings:

FIG. 1 is a schematic illustration of a shadow region formed by a backlight module;

fig. 2 is a schematic view of a backlight module according to an embodiment of the present invention;

fig. 3 is an enlarged view of a portion E of fig. 2.

The reference numbers are as follows:

100-a back plate; 200-a light bar; 210-a PCB board; 220-lamp bead; 230-a lens; 300-a reflector plate; 301-first light absorption point; 302-a second light absorption point; 310-a rider line; 311-a connecting part; 312-a discontinuity; 400-a diffusion plate; 500-a support;

a-a shadow area; b-light; c-a first direction; d-a second direction; px-a first distance; py-second distance.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

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

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

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "in 8230 \8230; below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

At design automated production preparation backlight unit's in-process, set up reflector plate 300 on backplate 100 earlier, set up the order of lamp strip 200 on reflector plate 300 again, it is comparatively convenient to operate, and it is less to need artifical the intervention, is favorable to the automatic operation more. However, the light bar 200 is disposed on the reflective sheet 300, because the reflectivity of the PCB 210 (i.e. the PCB 210 of the light bar 200 is a printed circuit board for mounting the light beads 220 and providing the light beads 220 with a circuit) is lower than that of the reflective sheet 300, a problem of shadow on the PCB 210 can be caused.

As shown in fig. 1, the PCB 210 of the light bar 200 is disposed above the reflector 300, and the light B emitted from the lamp beads 220 (the lamp beads 220 usually adopt LEDs, that is, light emitting diodes) is reflected and refracted by the lens 230 and then strikes the PCB 210, even though the reflectivity of the PCB 210 with high-reflection white oil to light is only about 89%, and the reflectivity of the reflector 300 is usually about 97%, so that the area above the PCB 210 darkens due to the reduction of the number of reflected light, thereby forming a shadow area a.

In view of the above, as shown in fig. 2 and 3, according to an embodiment of the present invention, a backlight module is provided, which includes a back plate 100, a reflective sheet 300 and at least one light bar group. The reflector plate 300 is arranged on the back plate 100, the lamp strip group is arranged on a reflecting surface of the reflector plate 300 departing from the back plate 100 and comprises a plurality of lamp strips 200, the lamp strips 200 are sequentially arranged at intervals along a first direction C in parallel, each lamp strip 200 extends along a second direction D perpendicular to the first direction C, and the lamp strips 200 are sequentially arranged at intervals along the second direction D and comprise a plurality of lamp beads 220. The distance between any two adjacent lamp beads 220 along the second direction D is a first distance Px, the distance between any two adjacent lamp strips 200 along the first direction C is a second distance Py, and the ratio of the first distance Px to the second distance Py is (1.

The reflective surface of the reflective sheet 300 is the side surface of the reflective sheet 300 for reflecting light, and the side surface is the side surface of the reflective sheet 300 facing away from the rear panel 100. The reflective sheet 300 can be adhered to the back plate 100 by using an adhesive.

Light bar 200 generally includes PCB board 210, light beads 220, and light bar terminals. The lamp beads 220 can be light emitting diodes generally, the lamp beads 220 are arranged on the PCB 210, and the lamp strip terminals are used for connecting wires so that the PCB 210 is connected with an external power supply. The PCB 210 of the light bar 200 should have a good reflective capability, and the PCB 210 of the light bar 200 may be a white oil PCB, and the PCB 210 is coated with a double layer of white oil.

The specific fixing manner of the PCB 210 of the light bar 200 may be that a plurality of mounting holes are disposed on the reflector 300 corresponding to the positions of the light bar 200, and the PCB 210 is fixed on the back panel 100 corresponding to the positions of the mounting holes by means of dispensing. The mounting holes of the reflector 300 can be arranged at intervals along the extending direction of the light bar 200, and the mounting holes and the positions of the lamp beads 220 of the light bar 200 are arranged in a one-to-one correspondence manner, so that in the dispensing process, dispensing can be performed on the back of the PCB 210 corresponding to the positions of the lamp beads 220, so that the dispensing positions of the PCB 210 can be positioned, and connection between the PCB 210 and the backboard 100 is realized.

It should be noted that the mounting hole should be smaller than the width and length of the PCB 210, so that the PCB 210 can completely cover the mounting hole, and the PCB 210 can also play a certain role in compressing the reflective sheet 300.

Each light bar group is composed of a plurality of parallel light bars arranged in parallel, and each light bar group generally includes a plurality of light bars 200 arranged in parallel between two opposite sides of the back plate 100 in the first direction C. Referring to fig. 2, two sets of light bar groups are arranged along a second direction D (i.e., a left-right direction), the two sets of light bar groups are arranged at intervals, each set of light bar 200 includes a plurality of light bars 200 sequentially arranged at intervals along a first direction C (i.e., an up-down direction of fig. 2 and 3), and each light bar 200 is arranged along the second direction D.

It can be understood that the light bar groups need to be reasonably arranged according to the size of the backboard 100 and the length of the light bars 200, and when the backboard 100 is small and the length range of the light bars 200 can meet the requirements of the backlight module, one light bar group can be arranged; when the backboard 100 is large and the length range of the light bars 200 cannot meet the requirements of the backlight module, a plurality of groups of light bars 200 can be arranged on the backboard 100. When multiple groups of light bars 200 are disposed, usually, the multiple light bars 200 of adjacent groups are disposed in a one-to-one correspondence manner, that is, the corresponding light bars 200 of adjacent groups are sequentially disposed along the second direction D.

In order to make the backlight module have relatively uniform brightness, the distances between adjacent lamp beads 220 on the same lamp strip 200 are the same, and the distances between adjacent lamp strips 200 along the first direction C are the same; when the light bar group is multiple, the distance between the adjacent lamp beads 220 of the light bars 200 adjacent to each other along the second direction D is close to or equal to the distance between the adjacent lamp beads 220 of the same light bar 200.

The first distance Px is a distance between the centers of the two lamp beads 210 along the second direction D; the second distance Py is a distance between the centers of the two light bars 200 along the first direction. The ratio of the first distance Px to the second distance Py may specifically be 1:2. or 1. Preferably, the ratio of the first distance Px to the second distance Py is 1, and in this ratio, the backlight module achieves an optimal shadow solution effect for the PCB 210.

According to the utility model discloses backlight unit of embodiment adds man-hour in production, can set up reflector plate 300 earlier according to range upon range of order, sets up lamp strip 200 on reflector plate 300's plane of reflection again. In the processing process, the possibility of mutual interference between the light bar 200 and the reflector plate 300 is reduced, and the automation operation is facilitated. A first distance Px between adjacent lamp beads 220 on the lamp strip 200 and a second distance Py between adjacent lamp strips 200 are between (1; the distance between the lamp beads 220 is small, so that the brightness between the lamp beads 220 can be increased, that is, the brightness of the PCB 210 of the lamp strip 200 is increased, the brightness of the PCB 210 is consistent or nearly consistent with that of other positions, the problem of shadow generation at the PCB 210 is solved, and the brightness of the backlight module is still uniform when the lamp strip 200 is arranged on the reflecting surface of the reflecting sheet 300.

It can be understood that, in the conventional art, the distance between the

light bars

200 and 200 is generally the same as the distance between the

light beads

220 and 220, subject to the consideration that the uniform arrangement of the light beads 220 can bring about uniform brightness. The utility model discloses embodiment has broken the technical consideration of current conventional art, through the second distance Py increase with between lamp strip 200 and the lamp strip 200, the first distance Px between the adjacent lamp pearl 220 on the lamp strip 200 reduces, the PCB board 210 that has improved lamp strip 200 produces the shadow problem, make lamp strip 200 install the backlight unit on the plane of reflection of reflector 300 still can satisfy the demand that luminance is even, thereby it becomes possible to make lamp strip 200 install the plane of reflection at reflector 300, backlight unit's production degree of automation has been improved.

Further, a plurality of first light absorption points 301 which are dispersedly arranged are arranged on the reflection surface of the reflection sheet 300 around the lamp bead 220.

The first light absorption dots 301 are dots having a lower reflection capability than the reflective sheet 300 and the PCB 210, and may be silk-screen dots, and particularly, may be circular black dots. By arranging the first light absorption point 301, a part of light can be absorbed, so that the light reflection capability in the arrangement area is reduced, and the corresponding brightness is reduced.

The light emitted by the lamp bead 220 is concentrated around the lamp bead 220, so the reflectivity of the reflector 300 around the lamp bead 220 is higher than that of the PCB 210 of the lamp strip 200, and the periphery of the lamp bead 220 can generate bright clusters, i.e. bright spots.

Through set up the light absorption point on the reflector panel 300 of lamp pearl 220 periphery, and do not set up the light absorption point on the PCB board 210 of lamp strip 200, can solve the lamp shadow problem of PCB board 210 department. Moreover, the light absorption points arranged on the reflector 300 around the lamp bead 220 can weaken the brightness of light spots formed around the lamp bead 220, and the problem of uneven light transition is avoided.

Specifically, the reflector plate is provided with a plurality of first light absorption points 301 which are dispersedly arranged corresponding to the lamp beads 220 on the reflecting surface between the adjacent lamp strips 200.

Referring to fig. 2 and 3, the first light absorption points 301 are disposed around the lamp beads 220, and the first light absorption points 301 are disposed between the adjacent lamp strips 200, that is, the first light absorption points 301 are not disposed on the reflective sheet 300 above the lamp beads 220 of the uppermost lamp strip 200 and the reflective sheet 300 below the lamp beads 220 of the lowermost lamp strip 200. By the arrangement mode, the overhigh brightness between the adjacent light bars 200 can be avoided, and the brightness of the edge of the backlight module is not influenced.

The first light absorption point 301 is disposed in a sector area of the reflection surface of one or both sides of the lamp bead 220 in the first direction C.

Referring to fig. 2 and 3, the first light absorption point 301 is disposed on the reflective sheet 300 in a sector area near the lamp bead 220. The first light absorption point 301 is arranged in the sector area below the reflecting surface of the reflecting sheet 300 corresponding to each lamp bead 220 of the uppermost lamp strip 200, and the first light absorption point 301 is arranged in the sector area above the reflecting surface of the reflecting sheet 300 corresponding to each lamp bead 220 of the lowermost lamp strip 200. The reflecting surface of the reflecting sheet 300 is provided with first light-absorbing points 301 in the upper and lower fan-shaped areas corresponding to the respective lamp beads 220 on the respective lamp strips 200 located between the uppermost lamp strip 200 and the lowermost lamp strip 200.

The light spot formed by the lamp bead 220 is a circular ring surrounding the lamp bead 220, and the fan-shaped area provided with the first light absorption point 301 corresponds to the circular ring, so that a better light-homogenizing effect can be achieved.

Optionally, the arrangement density of the first light absorption points gradually decreases from a position close to the lamp bead 220 to a position far away from the lamp bead 220.

The light spot formed by the conventional lens 230 is circular, and the brightness is smaller as the distance from the lamp bead 220 is larger, and the brightness is basically equal at the same distance. The density of the first light absorption points is reasonably set according to the brightness of light spots formed by the lamp beads 220 at all positions, so that the problem of uneven brightness transition can be avoided.

It should be noted that the position of the light spot formed by the lamp bead 220 can be measured through experiments, so that the specific position and density of the first light absorption point on the reflector 300 can be determined according to the position and brightness of the light spot obtained through experiments.

According to some embodiments of the present invention, optionally, along the first direction C, the second light absorption point 302 is disposed on the reflective surface of the reflective sheet 300 between the adjacent light bars 200.

The second light absorption dots 302 can also be silk-screen dots, and specifically can be circular black dots. The second light absorption point 302 also has a lower reflection capability than the PCB board 210 and the reflective sheet 300. By providing the second light absorption point 302, the second light absorption point 302 can absorb a portion of the light, so that the light reflection capability in the region where the second light absorption point is provided is reduced, thereby reducing the corresponding brightness.

The second light absorption point 302 is not disposed corresponding to the lamp bead 220, and is disposed in an area between the adjacent lamp strips 200 and has a certain distance from the lamp bead 220. Referring to fig. 2 and 3, when the first light absorption points 301 are provided corresponding to the lamp beads 220, the second light absorption points 302 are located in the areas between the first light absorption points 301 corresponding to the adjacent lamp beads 220.

After the distance between the light bars 200 and the light beads 220 is reasonably arranged, if the shadow problem of the PCB 210 still exists, the second light absorbing point 302 can be further arranged between the light bars 200 and the light bars 200 to reduce the brightness between the light bars 200 and the light bars 200, so that the area between the light bars 200 and the PCB area between the light beads 220 and the light beads 220 have similar or same brightness.

Referring to fig. 2, a mounting cavity is formed in the middle of the backplate 100, and a diffuser plate 400 is disposed on an end surface of the peripheral side wall of the backplate 100 facing away from the bottom wall of the mounting cavity. The reflective sheet 300 needs to form the same structure as the mounting cavity of the rear plate 100 to cover the entire surface of the rear plate 100 facing the reflective sheet 300. The periphery of the reflective sheet 300 needs to be folded to be attached to the peripheral sidewall of the installation cavity. Currently, the folding for the reflective sheet 300 usually needs to be done manually.

In order to facilitate the automatic production of the backlight module and improve the processing efficiency, the inner side of the circumferential edge of the reflection sheet 300 of the embodiment of the present invention is provided with a seam line 310. The saddle line 310 includes connecting portions 311 and intermittent portions 312, the connecting portions 311 and the intermittent portions 312 are alternately arranged along the extending direction of the saddle line 310, the connecting portions 311 are integrally connected to the reflective sheet 300 on both sides of the saddle line 310, and the intermittent portions 312 allow the reflective sheet 300 to be intermittently arranged at the intermittent portions 312.

The connection portions 311 are a part of the reflective sheet 300, which enables the reflective sheet 300 to remain as a unitary structure, and the discontinuity portions 312 enable a gap to be formed between adjacent connection portions 311. The connecting portion 311 and the intermittent portion 312 constitute the seam line 310, and it can be understood that the seam line 310 is intermittently provided along the extending direction of the seam line 310.

The connecting portion 311 is disposed so that the reflective sheet 300 is still of an integral structure, and the reflective sheet 300 is still integrally disposed on the back plate 100; by providing the discontinuity 312, the strength of the reflection sheet 300 at the seam line 310 is weakened, so that the reflection sheet 300 more easily follows the shape of the back sheet 100 at the seam line 310 to be adapted. When the reflective sheet 300 is arranged, the workload of manually turning over the reflective sheet 300 can be reduced, and the production efficiency can be improved.

Further, along the extending direction of the seam line 310, the ratio between the length of the discontinuous portion 312 and the length of the connecting portion 311 is greater than or equal to 8, and specifically may be 8.

The length of the discontinuous portion 312 is 8 times or more the length of the connecting portion 311, so that there is substantially no deformation resistance at the position of the seam line 310, and when the reflective sheet 300 is disposed on the rear panel 100, the reflective sheet 300 follows the shape of the mounting cavity at the position of the seam line 310 and naturally adheres to the bottom wall and the side wall of the mounting cavity. And when installing lamp strip 200 additional on reflector plate 300, the effort of pushing down of lamp strip 200 can further act on reflector plate 300 for the shape of reflector plate 300 and installation cavity matches, does not need artifical intervention completely, and convenient operation, degree of automation is higher, has improved production efficiency.

It should be understood that the backlight module of the present invention may further integrate other related components such as the diffusion plate 400. In one implementation, as shown in fig. 2 and 3, the reflective sheet 300 is further provided with a supporter 500 for assisting in supporting the diffusion plate 400, and the supporter 500 prevents the middle portion of the diffusion plate 400 from collapsing, thereby improving the installation stability of the diffusion plate 400.

To sum up, the backlight module provided by the embodiment of the present invention can solve the problem of dark shadows of the PCB board with the light bar placed on the reflector plate, and improve the subjectivity of the backlight module; meanwhile, by using the design scheme of the reflector plate, the automatic operation of the backlight module can be realized, the labor is saved, and the cost is reduced and the efficiency is improved.

The utility model discloses an embodiment still provides a display device, include the utility model discloses backlight unit.

The display device may be a computer display screen, a television display screen, or the like.

The utility model discloses a display device with the utility model provides a backlight unit has the same beneficial effect, no longer gives unnecessary details here.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A backlight module, comprising:

a back plate;

a reflective sheet disposed on the back plate;

the lamp strip group is arranged on a reflecting surface of the reflector plate, which is far away from the back plate, and comprises a plurality of lamp strips, the lamp strips are sequentially arranged at intervals in parallel along a first direction, each lamp strip extends along a second direction perpendicular to the first direction, and a plurality of lamp beads are sequentially arranged at intervals along the second direction;

the distance between any two adjacent lamp beads along the second direction is a first distance, the distance between any two adjacent lamp strips along the first direction is a second distance, and the ratio of the first distance to the second distance is (1.

2. The backlight module according to claim 1, wherein the reflective surface of the reflector sheet around the beads has a plurality of first light absorption points distributed thereon.

3. The backlight module according to claim 2, wherein the reflector plate is disposed on a reflective surface between adjacent light bars, and a plurality of first light absorption points are disposed in a dispersed manner corresponding to the light beads;

4. The backlight module as claimed in claim 2 or 3, wherein the first light absorption points are arranged in a density gradually decreasing from a position close to the beads to a position far away from the beads.

5. The backlight module according to claim 2 or 3, wherein the first light-absorbing dots are silkscreen dots;

and/or the first light absorption point is a circular point.

6. The backlight module according to any one of claims 1 to 3, wherein a second light absorption point is disposed on a reflective surface of the reflective sheet between adjacent light bars along the first direction.

7. The backlight module according to claim 6, wherein the second light absorbing dots are silk screen dots;

and/or the second light absorption points are all round points.

8. The backlight module according to any one of claims 1-3, wherein the reflection sheet is provided with a seam line on an inner side of a circumferential edge thereof, the seam line including connection portions and discontinuous portions, the connection portions and the discontinuous portions being alternately arranged in a direction in which the seam line extends, the connection portions being integrally connected to the reflection sheet on both sides of the seam line, the reflection sheet being discontinuously arranged at the discontinuous portions.

9. A backlight module according to claim 8, wherein the ratio between the length of the discontinuity and the length of the connecting portion in the direction of extension of the seam line is greater than or equal to 8.

10. A display device comprising the backlight module according to any one of claims 1 to 9.