Backlight module and display device

Abstract

The application provides a backlight module and a display device. The backlight module comprises a diffusion plate, a lamp plate, a first reflective sheet, and a first light-transmitting hole and a second light-transmitting hole array. The lamp plate is arranged opposite to the diffusion plate, and lamp beads are arranged on the side of the lamp plate facing the diffusion plate. The first reflective sheet is arranged between the lamp plate and the diffusion plate. The first reflective sheet has the first light-transmitting hole and the second light-transmitting hole array. The second light-transmitting hole array comprises a plurality of second light-transmitting holes, and the plurality of second light-transmitting holes are arranged around the first light-transmitting hole. The first light-transmitting hole is arranged opposite to the lamp beads, and the aperture of the second light-transmitting hole is larger than the aperture of the first light-transmitting hole. The backlight module can reduce the OD value of the diffusion plate and the lamp plate, so that the brightness uniformity can be improved while the display device is thinned.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to backlight modules and display devices. Background Technology

[0002] Direct-lit backlight modules offer a significant cost advantage in large-size displays. A backlight module consists of a lamp panel and a diffuser panel positioned opposite each other, with the distance between them defined by the OD value (over-dispersion distance). The OD value determines the uniformity of brightness; a smaller OD value allows for a thinner display, but also results in more uneven brightness and a less uniform image. Therefore, the development of thinner display devices is hindered by uneven brightness. Summary of the Invention

[0003] The main objective of this application is to provide a backlight module and a display device. The backlight module is designed to reduce the OD value of the diffuser plate and the lamp plate, so as to improve the uniformity of brightness while meeting the requirements of thinning the display device.

[0004] This application proposes a backlight module, including:

[0005] Diffuser plate;

[0006] A lamp panel, wherein the lamp panel is disposed opposite to the diffuser plate, and lamp beads are disposed on the side of the lamp panel facing the diffuser plate;

[0007] A first reflector is disposed between the lamp plate and the diffuser plate; the first reflector has a first light-transmitting hole and a second light-transmitting hole array; the second light-transmitting hole array includes a plurality of second light-transmitting holes, the plurality of second light-transmitting holes being arranged around the first light-transmitting hole; the first light-transmitting hole is positioned directly opposite the lamp bead, and the aperture of the second light-transmitting hole is larger than the aperture of the first light-transmitting hole.

[0008] Optionally, the first reflective sheet further comprises a third light-transmitting aperture array, the third light-transmitting aperture array including a plurality of third light-transmitting apertures arranged around the first light-transmitting aperture; the aperture diameter of the third light-transmitting aperture is larger than the aperture diameter of the first light-transmitting aperture; wherein, the second light-transmitting aperture array and the first light-transmitting aperture are at a first distance; and the third light-transmitting aperture array and the first light-transmitting aperture are at a second distance, the second distance being greater than the first distance;

[0009] Optionally, the distance between the lamp plate and the diffuser plate is 2-20 mm; and / or the thickness of the first reflector is 0.15-0.4 mm.

[0010] Optionally, the lamp panel has at least two of the lamp beads;

[0011] The first reflector has at least two first light-transmitting holes, and the lamp beads are arranged in a one-to-one correspondence with the first light-transmitting holes.

[0012] Optionally, the second reflective sheet has at least two sets of second light-transmitting hole arrays, and each set of second light-transmitting hole arrays surrounds one of the first light-transmitting holes;

[0013] Among them, a portion of the second light-transmitting holes of the corresponding two second light-transmitting hole arrays are arranged between two adjacent first light-transmitting holes.

[0014] Optionally, the backlight module further includes a second reflector, which is disposed on the lamp plate and faces the first reflector, so that the light from the lamp is emitted back and forth on the first reflector and the second reflector, so as to be emitted from the first light-transmitting hole and / or the second light-transmitting hole to the diffuser plate.

[0015] Optionally, the backlight module further includes:

[0016] A lamp support is provided on the lamp plate, extends from the lamp plate to the diffuser plate, and supports the diffuser plate.

[0017] The first reflective sheet is provided with a connecting hole, which is spaced apart from both the first light-transmitting hole and the second light-transmitting hole array; the lamp support passes through the connecting hole and is connected to the lamp support.

[0018] Optionally, the lamp support includes a first support portion and a second support portion; the first support portion is disposed on the lamp plate and extends toward the diffuser plate, and has a stepped surface; the second support portion is disposed on the stepped surface, extends toward the diffuser plate, and supports the diffuser plate;

[0019] The second support portion passes through the connection hole, and the side of the first reflector facing the lamp plate abuts against the stepped surface.

[0020] Optionally, the number of the first reflective sheets is at least two, and the at least two first reflective sheets are spaced apart between the diffuser plate and the lamp plate.

[0021] This application also proposes a display device, including the backlight module as described above.

[0022] In the technical solution of this application embodiment, a first reflective sheet is provided between a diffuser plate and a lamp plate. The first reflective sheet has a first light-transmitting hole and a second light-transmitting hole array. The first light-transmitting hole faces the lamp beads on the lamp plate that face the diffuser plate, while multiple second light-transmitting holes in the second light-transmitting hole array are arranged around the first light-transmitting hole. The aperture of the second light-transmitting hole is larger than the aperture of the first light-transmitting hole. Since the light intensity is greatest above the lamp beads, the light intensity gradually decreases as the distance and angle increase. The first light-transmitting hole closer to the lamp beads has a higher light intensity and a relatively smaller light-transmitting area, while the second light-transmitting hole farther from the lamp beads has a lower light intensity and a relatively larger light-transmitting area. This balances the light intensity emitted from the first reflective sheet, thereby achieving uniform light output. Because the light is adjusted by the first and second light-transmitting holes and the second light-transmitting hole array on the first reflective sheet, the light incident on the diffuser plate is more uniform. Therefore, the mixing distance between the diffuser plate and the lamp plate can be reduced compared to existing technologies, thereby improving the uniformity of brightness while meeting the requirements for thinner display devices. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a backlight module proposed in an embodiment of this application;

[0025] Figure 2 This is a partial planar structural diagram of the first reflective sheet of the backlight module proposed in an embodiment of this application;

[0026] Figure 3 This is a partial cross-sectional structural diagram of the first reflective sheet of the backlight module proposed in the embodiments of this application;

[0027] Figure 4 This is a schematic diagram of the planar structure of the first reflective sheet of the backlight module proposed in the embodiments of this application;

[0028] Figure 5 for Figure 4 Enlarged view of section A in the image;

[0029] Figure 6 This is a schematic diagram of the lamp support structure of the backlight module proposed in the embodiments of this application;

[0030] Figure 7 This is a schematic diagram of another structure of the backlight module proposed in the embodiments of this application;

[0031] List of reference numerals

[0032]

[0033] Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0035] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0036] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] Combination Figure 1 and Figure 2 As shown in the figure, this application provides a backlight module, including:

[0039] Diffuser plate 100;

[0040] A lamp panel 200 is disposed opposite to the diffuser plate 100, and an LED bead 210 is disposed on the side of the lamp panel 200 facing the diffuser plate 100.

[0041] A first reflector 300 is disposed between the lamp plate 200 and the diffuser plate 100; the first reflector 300 has a first light-transmitting hole 310 and a second light-transmitting hole array 320; the second light-transmitting hole array 320 includes a plurality of second light-transmitting holes 321, which are arranged around the first light-transmitting hole 310; the first light-transmitting hole 310 is positioned directly opposite the lamp bead 210, and the aperture of the second light-transmitting hole 321 is larger than the aperture of the first light-transmitting hole 310.

[0042] In the technical solution of this application embodiment, a first reflective sheet 300 is provided between the diffuser plate 100 and the lamp plate 200; the first reflective sheet 300 is provided with a first light-transmitting hole 310 and a second light-transmitting hole array 320; the first light-transmitting hole 310 is directly opposite the lamp bead 210 on the lamp plate 200 facing the diffuser plate 100, while a plurality of second light-transmitting holes 321 of the second light-transmitting hole array 320 are arranged around the first light-transmitting hole 310; the aperture of the second light-transmitting hole 321 is larger than the aperture of the first light-transmitting hole 310; since the light intensity is greatest above the lamp bead 210, the light intensity gradually decreases as the distance and angle increase; the first light-transmitting hole 310 closer to the lamp bead 210 has a greater light intensity and a relatively smaller light-transmitting area, while the second light-transmitting hole 321 farther from the lamp bead 210 has a smaller light intensity and a relatively larger light-transmitting area, thereby balancing the intensity of light emitted from the first reflective sheet 300, thereby achieving the purpose of uniform light output. Because the light is adjusted by the first light-transmitting hole 310 and the second light-transmitting hole array 320 on the first reflective sheet 300, the light directed toward the diffuser plate 100 is more uniform. Therefore, the light mixing distance between the diffuser plate 100 and the lamp plate 200 can be reduced based on the prior art, so as to improve the uniformity of brightness while meeting the requirements of thinning the display device.

[0043] It should be noted that the above "directly opposite" can be understood as the first light-transmitting hole 310 being set directly above the lamp bead 210, or slightly offset from the lamp bead 210.

[0044] Furthermore, it should be noted that the technical solution provided in this application embodiment can also be applied in the existing technical solution to the light mixing distance between the diffuser plate 100 and the lamp plate 200, which can further improve the uniformity of brightness while satisfying the uniformity of the light mixing distance, that is, it can be applied to the technical solution of the conventional thickness of the display device.

[0045] It should be noted that when the backlight module is assembled with the display screen, housing, etc., into a display device, the diffuser plate 100 and the lamp plate 200 are arranged opposite each other in the thickness direction of the actual device. From the inside to the outside of the display device, the structure of the backlight module is: lamp plate 200, first reflective sheet 300, and diffuser plate 100. The backlight module also includes a back plate, and both the lamp plate 200 and the diffuser plate 100 can be mounted on the back plate. This structure can adopt existing technology solutions, which will not be described in detail here; the first reflective sheet 300 can also be fixed on the back plate (in the embodiments described later, the first reflective sheet 300 can also be connected to the lamp support 400).

[0046] In some embodiments, the LED beads 210 are typically LED beads 210, such as ordinary LED beads 210 or miniLED beads 210. In an embodiment, there are multiple LED beads 210 on the light panel 200, spaced apart from each other. The types of LED beads 210 can be the same or different, and they are arranged according to a certain pattern. For example, the LED beads 210 may include red, yellow, and blue LED beads 210, arranged sequentially to form an array of LED beads 210, and multiple such arrays of LED beads 210 are arranged on the light panel 200. Alternatively, the LED beads 210 may include red, yellow, blue, and white LED beads 210, arranged around a white LED bead 210 to form an array of LED beads 210, and multiple such arrays of LED beads 210 are arranged on the light panel 200.

[0047] As an optional implementation of the above embodiments, refer to Figure 3 As shown, the first reflective sheet 300 also has a third light-transmitting aperture array 330, which includes a plurality of third light-transmitting apertures 331, which are arranged around the first light-transmitting aperture 310; the aperture of the third light-transmitting aperture 331 is larger than the aperture of the second light-transmitting aperture 321. Wherein, as... Figure 3 As shown, the second light-transmitting hole array 320 and the first light-transmitting hole 310 have a first distance D1; the third light-transmitting hole array 330 and the first light-transmitting hole 310 have a second distance D2, the second distance being greater than the first distance.

[0048] In this embodiment, to further improve brightness uniformity and light extraction efficiency, a third light-transmitting aperture array 330 is also provided on the first reflective sheet 300; the third light-transmitting aperture array 330 includes a plurality of third light-transmitting apertures 331, the apertures of which are larger than the apertures of the second light-transmitting apertures 321. That is, in this embodiment, further... Figure 3As shown, a third light-transmitting hole array 330 is set around the second light-transmitting hole array 320. The third light-transmitting hole 331 of the third light-transmitting hole array 330 has a larger light-emitting area, thereby improving the light-emitting efficiency while balancing the light intensity emitted by the lamp bead 210, so as to achieve the purpose of uniform light emission and improved light-emitting efficiency.

[0049] It should be noted that in some embodiments, the first reflective sheet 300 is further provided with a fourth light-transmitting hole array, which is disposed around the third light-transmitting hole array 330; the fourth light-transmitting hole array includes multiple fourth light-transmitting holes, and the aperture of the fourth light-transmitting hole is larger than the aperture of the third light-transmitting hole 331. That is, in the technical solution of this application embodiment, multiple sets of light-transmitting hole arrays can be arranged sequentially along the direction away from the first light-transmitting hole 310. The light-transmitting holes in the light-transmitting hole array closer to the first light-transmitting hole 310 have smaller apertures, and the light-transmitting holes in the light-transmitting hole array farther from the first light-transmitting hole 310 have larger apertures. In this way, the change in light intensity is balanced by the gradual setting of the light-emitting area, thereby improving the light-emitting efficiency and balancing the light intensity emitted by the lamp bead 210, so as to achieve the purpose of uniform light emission and improved light-emitting efficiency.

[0050] In the above embodiments, the aperture of the light-transmitting hole can be understood as follows: if the light-transmitting hole is circular, the aperture is the diameter of the circular hole; if the light-transmitting hole is elliptical, the aperture can be represented by the minor axis * major axis; if the light-transmitting hole is square, the aperture can be represented by the length * width; if the light-transmitting hole is a regular polygon, the aperture can be represented by the diameter of its inscribed circle. Alternatively, if the light-transmitting hole is other irregular shapes, it can be identified by measuring the light-emitting area of ​​a certain cross-section, that is, the aperture of the light-transmitting hole represents the light-emitting area.

[0051] In the above embodiments, the light-transmitting aperture array can be a square array or a circular array, radiating outwards in concentric rings. The first, second, and third distances (hereinafter referred to as distances) between the second, third, and fourth light-transmitting aperture arrays 320, 330, and 410 and the first light-transmitting aperture 310 are defined as follows: If the light-transmitting aperture array is a circular array, the distance is the distance between the centroid of the second, third, and fourth light-transmitting apertures and the centroid of the first light-transmitting aperture 310; if the light-transmitting aperture array is a square array, the distance is the radius of the circumcircle of the square defined by the arrays of the second, third, and fourth light-transmitting apertures 320, 330, and 410.

[0052] As an optional implementation of the above embodiments, the spacing between the lamp panel 200 and the diffuser plate 100 is 2-20 mm. The thickness of the first reflective sheet 300 is 0.15-0.4 mm. That is, in this embodiment, the first reflective sheet 300 occupies only a small space between the lamp panel 200 and the diffuser plate 100, and does not cause any change in the space between the lamp panel 200 and the diffuser plate 100. For example, the spacing between the lamp panel 200 and the diffuser plate 100 is 2 mm, and the thickness of the first reflective sheet 300 is 0.15 mm; the spacing between the lamp panel 200 and the diffuser plate 100 is 20 mm, and the thickness of the first reflective sheet 300 is 0.4 mm; the spacing between the lamp panel 200 and the diffuser plate 100 is 10 mm, and the thickness of the first reflective sheet 300 is 0.25 mm.

[0053] As an optional implementation of the above embodiments, the lamp board 200 has at least two lamp beads 210; the first reflector 300 has at least two first light-transmitting holes 310, and the lamp beads 210 are arranged in a one-to-one correspondence with the first light-transmitting holes 310. That is, in the technical solution of this application embodiment, each lamp bead 210 is provided with a corresponding first light-transmitting hole 310, and each first light-transmitting hole 310 is provided with a corresponding second light-transmitting hole array 320. In this way, the light intensity of each lamp bead 210 can be balanced through the light-transmitting holes on the first reflector 300, so that the light is more evenly irradiated onto the diffuser plate 100, thereby reducing the OD value while achieving uniform light output.

[0054] For example, such as Figure 4 As shown, each of the first light-transmitting holes 310 on the lamp panel 200 is surrounded by an array of light-transmitting holes. Each of the first light-transmitting holes 310 is positioned directly opposite the lamp bead 210.

[0055] As an optional implementation of the above embodiments, such as Figure 5 As shown, the first reflective sheet 300 has at least two sets of second light-transmitting hole arrays 320, and each set of second light-transmitting hole arrays 320 surrounds one first light-transmitting hole 310; wherein, between two adjacent first light-transmitting holes 310, a portion of the second light-transmitting holes 321 of their corresponding two second light-transmitting hole arrays 320 are arranged. The light emitted by the lamp bead 210 has a certain emission angle and can cover a certain area; after the light from one lamp bead 210 is mixed with the light from another lamp bead 210, it can be emitted separately from the second light-transmitting hole 321 between them, thereby improving the uniformity of light output.

[0056] As an optional implementation of the above embodiments, the backlight module further includes a second reflector 500, which is disposed on the lamp plate 200 and faces the first reflector 300, so that the light from the lamp bead 210 is emitted back and forth on the first reflector 300 and the second reflector 500, so as to be emitted from between the first light-transmitting hole 310 and / or the second light-transmitting hole 321 to the diffuser plate 100. The light emitted by the LED bead 210 is emitted through the first light-transmitting hole 310 and the second light-transmitting hole array 320. When the light does not hit the first light-transmitting hole 310 and the second light-transmitting hole array 320, it is reflected and then emitted by the second reflective sheet 500 on the lamp plate 200. After multiple reflections, the light can be mixed and emitted at a greater distance from the LED bead 210, thereby improving the uniformity of light emission. That is, in the technology of this application embodiment, through multiple reflections by the first reflective sheet 300 and the second reflective sheet 500, the light entering the diffuser plate 100 is more uniform and the light uniformity is higher.

[0057] In this embodiment, the first reflective sheet 300 and the second reflective sheet 500 are sheet-like structures made of a material with high reflectivity. The second reflective sheet 500 can be attached to or threadedly fixed to the lamp panel 200.

[0058] As an optional implementation of the above embodiments, the backlight module further includes: a lamp support 400, which is disposed on the lamp plate 200, extends from the lamp plate 200 to the diffuser plate 100, and supports the diffuser plate 100. The first reflective sheet 300 is provided with a connecting hole 340, which is spaced apart from the first light-transmitting hole 310 and the second light-transmitting hole array 320; the lamp support 400 passes through the connecting hole 340 and is connected to the lamp support 300. In the technical solution of this application embodiment, by connecting the first reflective sheet 300 through the lamp support 400 originally present on the backlight module, the number of fixing components required due to the setting of the first reflective sheet 300 can be reduced, thereby reducing the complexity of the backlight module.

[0059] like Figure 2 As shown and Figure 4 As shown, the first reflector 300 is provided with a plurality of connecting holes 340, which correspond to the lamp supports 400 on the lamp panel 200. Each lamp support 400 extends through its corresponding connecting hole 340 and connects to the first reflector 300, thereby fixing the first reflector 300. In this embodiment, the lamp support 400 and the connecting hole 340 can be fastened together; alternatively, after the lamp support 400 passes through the connecting hole 340, it can be glued and fixed by applying adhesive inside the connecting hole 340.

[0060] As an optional implementation of the above embodiments, refer to Figure 6As shown, the lamp support 400 includes a first support portion 410 and a second support portion 420; the first support portion 410 is disposed on the lamp plate 200 and extends toward the diffuser plate 100, and has a stepped surface 411. (Refer to...) Figure 1 As shown, the second support portion 420 is disposed on the stepped surface 411 and extends toward and supports the diffuser plate 100; the second support portion 420 passes through the connecting hole 340, and the side of the first reflector 300 facing the lamp plate 200 abuts against the stepped surface 411. During assembly, the connecting hole 340 of the first reflector 300 is aligned with the lamp support 400, and the connecting hole 340 of the first reflector 300 is fitted onto the lamp support 400. Then, the stepped surface 411 of the lamp support 400 abuts against the support surface 350 of the first reflector 300 facing the lamp plate 200, thereby positioning the first reflector 300 between the lamp plate 200 and the diffuser plate 100.

[0061] In this embodiment, the position of the step surface 411 is the installation position of the first reflector 300, and its setting can be specifically set according to the power of the lamp bead 210, the arrangement of the lamp bead 210, and the OD value between the lamp plate 200 and the diffuser plate 100.

[0062] As an optional implementation of the above embodiments, the number of the first reflective sheets 300 is at least two, and the at least two first reflective sheets 300 are spaced apart between the diffuser plate 100 and the lamp plate 200. In this embodiment, by providing two first reflective sheets 300, the light uniformity can be further improved. The light can be reflected back and forth between the first reflective sheets 300 before being emitted, so that the light is uniformly mixed before being emitted, thereby achieving the purpose of reducing the OD value.

[0063] Reference Figure 7 As shown, two first reflective sheets 300 are arranged opposite each other in the spacing direction between the diffuser plate 100 and the lamp plate 200. The lamp support 400 is provided with two stepped surfaces 411 spaced apart in the spacing direction between the diffuser plate 100 and the lamp plate 200, thereby fixing the two first reflective sheets 300.

[0064] In some embodiments, the first light-transmitting holes 310 between two adjacent first reflective sheets 300 are arranged facing each other, and the second light-transmitting holes 321 between two adjacent first reflective sheets 300 are arranged facing each other or misaligned.

[0065] In some embodiments, the second light-transmitting holes 321 between two adjacent first reflective sheets 300 are arranged opposite each other, and the aperture of the second light-transmitting hole 321 on the first reflective sheet 300 near the lamp plate 200 is smaller than the aperture of the second light-transmitting hole 321 on the first reflective sheet 300 away from the lamp plate 200; in this structure, the light extraction efficiency can be improved while mixing uniform light.

[0066] This application also provides a display device including a backlight module. This backlight module employs some or all of the technical solutions described in the foregoing embodiments, and therefore possesses some or all of the technical advantages of the foregoing embodiments, which will not be elaborated upon here. The display device also includes a display screen, with the backlight module disposed below the display screen.

[0067] This application does not impose specific limitations on the application of the display device, which may be a handheld device (smartphone, tablet, etc.), a television, a wearable device (smart bracelet, wireless earphone, smartwatch, smart glasses, etc.), an in-vehicle device (navigation system, reversing system, dashcam, car refrigerator, etc.), a virtual reality device, an augmented reality device, a terminal device, etc., and is not limited herein.

[0068] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of the specification and drawings of this application under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A backlight module, characterized in that, include: Diffuser plate; A lamp panel, wherein the lamp panel is disposed opposite to the diffuser plate, and lamp beads are disposed on the side of the lamp panel facing the diffuser plate; A first reflective sheet is disposed between the lamp plate and the diffuser plate; the first reflective sheet has a first light-transmitting hole and a second light-transmitting hole array; the second light-transmitting hole array includes a plurality of second light-transmitting holes, the plurality of second light-transmitting holes being arranged around the first light-transmitting hole; the first light-transmitting hole is positioned directly opposite the lamp bead, and the aperture of the second light-transmitting hole is larger than the aperture of the first light-transmitting hole; The number of the first reflective sheets is at least two; the first light-transmitting holes between two adjacent first reflective sheets are arranged facing each other; the second light-transmitting holes between two adjacent first reflective sheets are arranged facing each other, and the aperture of the second light-transmitting hole on the first reflective sheet closer to the lamp board is smaller than the aperture of the second light-transmitting hole on the first reflective sheet farther away from the lamp board.

2. The backlight module as described in claim 1, characterized in that, The first reflective sheet also has a third light-transmitting hole array, which includes a plurality of third light-transmitting holes arranged around the first light-transmitting hole; the aperture of the third light-transmitting hole is larger than the aperture of the second light-transmitting hole. Wherein, the second light-transmitting hole array and the first light-transmitting hole have a first distance; The third light-transmitting hole array has a second distance from the first light-transmitting hole, and the second distance is greater than the first distance.

3. The backlight module as described in claim 1, characterized in that, The distance between the lamp plate and the diffuser plate is 2-20 mm; and / or the thickness of the first reflector is 0.15-0.4 mm.

4. The backlight module as described in claim 1, characterized in that, The lamp panel has at least two of the lamp beads; The first reflector has at least two first light-transmitting holes, and the lamp beads are arranged in a one-to-one correspondence with the first light-transmitting holes.

5. The backlight module as described in claim 4, characterized in that, The first reflective sheet has at least two sets of second light-transmitting hole arrays, and each set of second light-transmitting hole arrays surrounds one of the first light-transmitting holes; Among them, a portion of the second light-transmitting holes of the corresponding two second light-transmitting hole arrays are arranged between two adjacent first light-transmitting holes.

6. The backlight module as described in claim 1, characterized in that, The backlight module further includes a second reflector, which is disposed on the lamp plate and faces the first reflector, so that the light from the lamp bead is emitted back and forth on the first reflector and the second reflector, so as to be emitted from the first light-transmitting hole and / or the second light-transmitting hole to the diffuser plate.

7. The backlight module as described in claim 1, characterized in that, The backlight module also includes: A lamp support is provided on the lamp plate, extends from the lamp plate to the diffuser plate, and supports the diffuser plate. The first reflective sheet is provided with a connecting hole, which is spaced apart from both the first light-transmitting hole and the second light-transmitting hole array; the lamp support passes through the connecting hole and is connected to the lamp support.

8. The backlight module as described in claim 7, characterized in that, The lamp support includes a first support portion and a second support portion; the first support portion is disposed on the lamp plate and extends toward the diffuser plate, and has a stepped surface; the second support portion is disposed on the stepped surface, extends toward the diffuser plate, and supports the diffuser plate. The second support portion passes through the connection hole, and the side of the first reflector facing the lamp plate abuts against the stepped surface.

9. The backlight module as described in claim 1, characterized in that, At least two of the first reflective sheets are spaced apart between the diffuser plate and the lamp plate.

10. A display device, characterized in that, Includes the backlight module according to any one of claims 1 to 9.

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