Backlight module and display device

Abstract

The present application relates to a backlight module and a display device. The backlight module includes a substrate and multiple light-adjusting components. A plurality of light-emitting elements arranged in an array are disposed on one side of the substrate. The light-adjusting components are located on the light-emitting side of the light-emitting elements, with each light-adjusting component positioned between two adjacent light-emitting elements to converge the light emitted by the light-emitting elements. Furthermore, the light-adjusting components are positioned above the light-emitting elements to distribute the light emitted by the light-emitting elements. The backlight module can reduce the brightness of the area where the light-emitting elements are located and increase the brightness of the gap area, thereby improving the uneven brightness of the backlight module and enhancing the uniformity of the light output from the backlight module.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] In direct-lit Mini LED backlight modules, the luminous flux values ​​of the arrayed LED point light sources vary at different luminous angles. This results in a difference in brightness between the gaps between the LED point light sources and the brightness at a point perpendicular to the LED point light sources, creating inconsistent luminous spectra. This results in visual differences in brightness and color, leading to uneven display across the entire display device. Summary of the Invention

[0003] The present application provides a backlight module and a display device to solve the problem of uneven display of the display device.

[0004] In a first aspect, the present application provides a backlight module, including.

[0005] In a possible implementation, a substrate, wherein a plurality of light-emitting elements distributed in an array are provided on one side of the substrate; and

[0006] Multiple light adjustment parts are located on the light-emitting side of the light-emitting element, and the light adjustment parts are respectively located between two adjacent light-emitting elements to converge the light emitted by the light-emitting elements; and / or the light adjustment parts are correspondingly located above the light-emitting elements to diverge the light emitted by the light-emitting elements.

[0007] In one possible implementation, the light adjustment member is provided with a through hole in the thickness direction of the substrate, the two ends of the through hole are respectively a first opening and a second opening, and the end of the through hole close to the light-emitting element is the first opening, and the light adjustment member is formed with a first light-transmitting portion and a second light-transmitting portion through the through hole, and the first light-transmitting portion and the second light-transmitting portion are both reflective surfaces on the sides facing each other.

[0008] In a possible implementation, the light adjustment member is located between two adjacent light-emitting elements, and the width of the first opening is smaller than the width of the second opening.

[0009] In a possible implementation, the light adjustment member is located above the light emitting element, and the width of the first opening is greater than the width of the second opening.

[0010] In a possible implementation, the two reflective surfaces of the light adjustment member are arranged axially symmetrically with respect to a thickness direction of the substrate.

[0011] In a possible implementation, the reflective surface is a sloped surface or a curved surface.

[0012] In a possible implementation, at least one light adjustment member is disposed above the light emitting element, at least one light adjustment member is disposed between two adjacent light emitting elements, and the distance between each light adjustment member and the substrate is the same.

[0013] In one possible implementation, a first light reflecting layer and a second light reflecting layer are provided at intervals on the light emitting side of the light emitting element, and each of the light adjustment components is located in the first light reflecting layer and the second light reflecting layer, respectively. Each light adjustment component located in the first light reflecting layer is positioned above the light emitting element, and each light adjustment component located in the second light reflecting layer is located between adjacent light emitting elements.

[0014] In a possible implementation, a third light reflecting layer is further included, which is located on a side of the second light reflecting layer away from the first light reflecting layer. A plurality of light adjusting members are provided in the third light reflecting layer, and each light adjusting member is provided between two adjacent light emitting elements.

[0015] In a second aspect, the present application provides a backlight module, including the backlight module as described in the first aspect.

[0016] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0017] The backlight module provided in this embodiment has light-emitting elements for emitting light. Due to the spacing of the light-emitting elements, the luminous flux values ​​of the light-emitting elements at different luminous angles when emitting light differ, resulting in a difference in brightness between the gaps between the light-emitting elements and the brightness at a point perpendicular to the light-emitting elements, that is, the brightness directly above the light-emitting elements is too high, and the brightness at the gaps between the light-emitting elements is too low. By providing a light-adjusting member at the gaps between the light-emitting elements, the brightness at the gaps between the light-emitting elements is converged, the brightness at the gaps between the light-emitting elements is increased, and the difference between the brightness directly above the light-emitting elements and the brightness at the gaps is reduced; and / or by providing a light-adjusting member above the light-emitting elements, the brightness at a point perpendicular to the light-emitting elements is dispersed, the brightness directly above the light-emitting elements is reduced, and the difference between the brightness directly above the light-emitting elements and the brightness at the gaps is reduced. Based on this, the difference in visual brightness and chromaticity can be improved, the display visual effect can be greatly improved, and the problem of uneven display can be solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 A schematic structural diagram of a backlight module provided in an embodiment of the present application (I);

[0022] Figure 2 A schematic diagram of the structure of a backlight module provided in an embodiment of the present application (II);

[0023] Figure 3 A schematic structural diagram of a light adjustment component in a backlight module provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the structure of a backlight module provided in an embodiment of the present application (III);

[0025] Figure 5 A schematic structural diagram of a backlight module provided in an embodiment of the present application (IV);

[0026] Figure 6 A schematic structural diagram of a backlight module provided in an embodiment of the present application for reflecting light;

[0027] Figure 7 This is a structural schematic diagram of a backlight module provided in an embodiment of the present application (V).

[0028] Description of reference numerals:

[0029] 1. Substrate; 2. Light-emitting element; 3. Light-adjusting member; 31. First opening; 32. Second opening; 33. First light-transmitting portion; 34. Second light-transmitting portion; 35. Reflective surface. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0032] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0033] Example 1

[0034] Reference Figure 1-Figure 2 , an embodiment of the present application provides a backlight module, comprising:

[0035] A substrate 1, with a plurality of light-emitting elements 2 arranged in an array on one side of the substrate 1; and

[0036] Multiple light adjustment parts 3 are located on the light-emitting side of the light-emitting element 2. The light adjustment parts 3 are respectively located between two adjacent light-emitting elements 2 to converge the light emitted by the light-emitting element 2; and / or the light adjustment parts 3 are correspondingly located above the light-emitting element 2 to diverge the light emitted by the light-emitting element 2.

[0037] In order to solve the problem of brightness difference between the gap between the light-emitting elements 2 and the brightness at a point perpendicular to the light-emitting elements 2, the existing direct-type backlight module is provided with more layers of diffusion films. However, this method has limited improvement on the brightness difference, and the addition of more diffusion films will also lead to brightness loss.

[0038] The light-emitting elements 2 in the present application are used to emit light. Since the light-emitting elements 2 are arranged at intervals, the luminous flux values ​​of the light-emitting elements 2 at different luminous angles when emitting light are different, resulting in a difference in brightness between the gaps between the light-emitting elements 2 and the brightness at a point perpendicular to the light-emitting elements 2, that is, the brightness directly above the light-emitting elements 2 is too high, and the brightness at the gaps between the light-emitting elements 2 is too low. By arranging a light adjustment member 3 at the gaps between the light-emitting elements 2, the brightness at the gaps between the light-emitting elements 2 is converged, the brightness at the gaps between the light-emitting elements 2 is increased, and the difference between the brightness directly above the light-emitting elements 2 and the brightness at the gaps is reduced; and / or by arranging a light adjustment member 3 above the light-emitting elements 2, the brightness at a point perpendicular to the light-emitting elements 2 is dispersed, the brightness directly above the light-emitting elements 2 is reduced, and the difference between the brightness directly above the light-emitting elements 2 and the brightness at the gaps is reduced; based on this, the difference in visual brightness and chromaticity can be improved, the display visual effect can be greatly improved, and the problem of uneven display can be solved.

[0039] Combine Figure 3, the light adjustment member 3 is provided with a through hole in the thickness direction of the substrate 1, and the two ends of the through hole are respectively a first opening 31 and a second opening 32, and the end of the through hole close to the light emitting element 2 is the first opening 31, and the light adjustment member 3 is formed with a first light-transmitting portion 33 and a second light-transmitting portion 34 through the through hole, and the first light-transmitting portion 33 and the second light-transmitting portion 34 facing each other are both reflective surfaces 35; the first opening 31 and the second opening 32 are formed by the setting of the through hole, thereby providing space for the light emitted by the light emitting element 2 to pass through. In addition, the light adjustment member 3 is formed with a first light-transmitting portion 33 and a second light-transmitting portion 34 through the opening of the through hole, and the setting of the first light-transmitting portion 33 and the second light-transmitting portion 34 can penetrate the light of the light emitting element 2 irradiated thereon, so that there is no loss of brightness when the light passes through the light adjustment member 3, and the stable light emission of the light emitting element 2 can be guaranteed. After the light-emitting element 2 enters the interior of the light-adjusting member 3 through the first opening 31 or the second opening 32, the side wall of the internal cavity is the reflective surface 35, and the light will be refracted after being irradiated by the reflective surface 35. The refraction effect of the reflective surface 35 can converge the light emitted at a large angle in the light-emitting unit, thereby greatly converging the oblique light to the center, brightening the brightness of the dark area in the middle part of the backlight module; of course, the light will be refracted after being irradiated by the reflective surface 35, and the refraction effect of the reflective surface 35 can also diverge the light emitted at a small angle in the light-emitting unit, thereby reducing the brightness directly above the light-emitting element 2, and improving poor visual effects by reducing the center brightness.

[0040] Reference Figure 1 and Figure 4 Specifically, the light adjustment member 3 is located between two adjacent light-emitting elements 2, and the width of the first opening 31 is smaller than the width of the second opening 32; by setting the width of the first opening 31 of the light adjustment member 3 to be smaller than the width of the second opening 32, the light emitted by the light-emitting element 2 is irradiated on the reflecting surface 35, and the reflecting surface 35 has a convergence effect on the light, that is, the light adjustment member 3 at this time is used to converge the large-angle light emitted by the light-emitting element 2, so the light adjustment member 3 should be set between the adjacent light-emitting elements 2 to brighten the brightness of the area between the adjacent light-emitting elements 2.

[0041] Reference Figure 2 and Figure 5Specifically, the light-adjusting member 3 is located above the light-emitting element 2, and the width of the first opening 31 is greater than the width of the second opening 32. By setting the width of the first opening 31 of the light-adjusting member 3 to be greater than the width of the second opening 32, the light emitted by the light-emitting element 2 is irradiated onto the reflective surface 35, and the reflective surface 35 has a diverging effect on the light. That is, the light-adjusting member 3 is used to diverge the small-angle light emitted by the light-emitting element 2. Therefore, the light-adjusting member 3 should be located above the light-emitting element 2 to reduce the brightness above the light-emitting element 2. It should be noted that when the light-adjusting member 3 in this application is used to diverge the light of the light-emitting element 2, the light-adjusting member 3 is located above the light-emitting element 2, which means that it is located in the projection area directly above the light-emitting element 2, and its function is also to reflect the light irradiated from directly above the light-emitting element 2.

[0042] It can be seen from this that, while ensuring that the structure of the light adjustment member 3 remains unchanged, the light adjustment member 3 can be used upright when located in the gap between the light emitting element 2, and when the light adjustment member 3 is arranged above the light emitting element 2, the light adjustment member 3 can be used only inverted to achieve the above effect.

[0043] Optionally, the reflective surface 35 is an inclined surface or an arc surface, so as to converge or diverge the light emitted by the light-emitting element 2 through the reflective surface 35. Of course, the reflective surface 35 can also be other shapes to ensure the reflection effect. Exemplarily, the reflective surface 35 can be a metal surface with a reflective effect, and the metal surface can be one or more of nickel-iron alloy, invar alloy, aluminum alloy and silver alloy. The through-opening of the first opening 31 and the second opening 32 in the light adjustment member 3 can be made by the process of making a high-precision mask plate (FMMsheet), and the material is the same as or similar to the FMM. The through hole in the light adjustment member 3 is made the same as or similar to the evaporation opening; the thickness of the light adjustment member 3 prepared by evaporation can be 3 to 30um.

[0044] Combine Figure 6 and Figure 7 In some embodiments, the two reflecting surfaces 35 of the light-adjusting member 3 are symmetrically arranged with respect to the thickness direction of the substrate 1; by symmetrically arranging the two reflecting surfaces 35, the light symmetrically incident on the light-adjusting member 3 by adjacent light-emitting elements 2 can still be symmetrically emitted from the light-adjusting member 3, thereby ensuring that the light-adjusting member 3 only changes the light emission direction, and can stably converge small-angle light to prevent the light from scattering after convergence, affecting the overall brightness and visual effects.

[0045] Reference Figure 1 and Figure 4, wherein, there can be at least one light adjustment member 3 located between two adjacent light emitting elements 2, that is, there can be one, two or more light adjustment members 3 located between two adjacent light emitting elements 2. When there is one light adjustment member 3 located in the gap between two adjacent light emitting elements 2, the light adjustment member 3 is located in the middle of the gap, and the two reflective surfaces 35 of the light adjustment member 3 are arranged axially symmetrically with respect to the light emitting direction of the light emitting element 2, thereby ensuring that the large-angle light of the two light emitting elements 2 is converged. However, when there are two light adjustment members 3 located in the gap between two adjacent light emitting elements 2, the structures of the two reflective surfaces 35 in the light adjustment member 3 can be different. The different structures of the two reflective surfaces 35 include that one of the reflective surfaces 35 can be an inclined surface, and the other reflective surface 35 can be a curved surface; of course, the different structures of the two reflective surfaces 35 also include that both reflective surfaces 35 are curved surfaces, and the concave curvature of the two curved surfaces is different. Specifically, for ease of description, the two light-emitting elements 2 are respectively a first light-emitting element 2 and a second light-emitting element 2, and the two light-adjusting members 3 are respectively a first light-adjusting member 3 and a second light-adjusting member 3. The first light-adjusting member 3 is positioned adjacent to the first light-emitting element 2. The four reflective surfaces 35 are respectively and sequentially the first reflective surface 35, the second reflective surface 35, the third reflective surface 35, and the fourth reflective surface 35. The first reflective surface 35 is positioned adjacent to the first light-emitting element 2. Light emitted by the first light-emitting element 2 at a narrow angle is reflected and converged by the second reflective surface 35, while light emitted by the first light-emitting element 2 at a wide angle is reflected and converged by the fourth reflective surface 35. Light emitted by the second light-emitting element 2 at a narrow angle is reflected and converged by the third reflective surface 35, while light emitted by the second light-emitting element 2 at a wide angle is reflected and converged by the fourth reflective surface 35. Therefore, to further enhance visual quality, the first light-adjusting member 3 and the second light-adjusting member 3 are arranged symmetrically about an axis parallel to the light emission direction of the light-emitting element 2. It can be known that when multiple light adjustment members 3 are provided, the arrangement principle is similar to the above, so this embodiment will not be described in detail.

[0046] Reference Figure 2 and Figure 5Similarly, at least one light-adjusting member 3 can be provided above the light-emitting element 2, that is, one, two or more light-adjusting members 3 can be provided above the light-emitting element 2. When there is one light-adjusting member 3 above the light-emitting element 2, the first light-transmitting portion 33 and the second light-transmitting portion 34 in the light-adjusting member 3 are symmetrically arranged about the vertical light axis of the light-emitting element 2, thereby ensuring uniform divergence of small-angle light on both sides of the light-emitting element 2. However, when there are two light-adjusting members 3 above the light-emitting element 2, the structures of the two reflective surfaces 35 in the light-adjusting member 3 can be different. The different structures of the two reflective surfaces 35 include that one of the reflective surfaces 35 can be an inclined surface and the other reflective surface 35 can be a curved surface; of course, the different structures of the two reflective surfaces 35 also include that both reflective surfaces 35 are curved surfaces and the concave curvature of the two curved surfaces is different. Specifically, for ease of description, the two light-adjusting members 3 are respectively a first light-adjusting member 3 and a second light-adjusting member 3 , and the four reflective surfaces 35 are respectively, in order, a first reflective surface 35 , a second reflective surface 35 , a third reflective surface 35 , and a fourth reflective surface 35 . Of the light emitted by the light-emitting element 2, light emitted at a small angle on one side of the light-emitting element 2 is reflected by the first reflective surface 35 and diverges. Light emitted at an even smaller angle on one side of the light-emitting element 2 is also reflected by the first reflective surface 35 and then reflected again by the second reflective surface 35 before diverging. Light emitted at a small angle on the other side of the light-emitting element 2 is reflected by the fourth reflective surface 35 and then converges. Light emitted at an even smaller angle on the other side of the light-emitting element 2 is reflected by the fourth reflective surface 35 and then reflected again by the third reflective surface 35 before diverging. Therefore, to further enhance visual quality, the first and second light-adjusting members 3 are arranged symmetrically about an axis parallel to the light emission direction of the light-emitting element 2. It should be understood that when multiple light-adjusting members 3 are provided, the arrangement principle is similar to that described above, and therefore will not be further described in this embodiment.

[0047] It should be understood that the present application does not impose any restrictions on the specific structure of the reflective surface 35. The reflective surface 35 can be adapted to the size of the light-emitting elements 2 in different application scenarios, the gaps between the light-emitting elements 2, and the application scenarios of the backlight module. Therefore, the reflective surface 35 can be any structure that meets the above requirements, including but not limited to a flat surface, a curved surface, a folded surface, etc.

[0048] Reference Figure 6In some embodiments, at least one light-adjusting member 3 is provided above the light-emitting element 2, and at least one light-adjusting member 3 is provided between two adjacent light-emitting elements 2. The distance between each light-adjusting member 3 and the substrate 1 is the same. When multiple light-adjusting members 3 are provided, each light-adjusting member 3 can be provided above the light-emitting element 2 to diverge the light of the light-emitting element 2 at a small angle; each light-adjusting member 3 can also be provided in the gap between the light-emitting element 2 to converge the light of the light-emitting element 2 at a large angle; of course, each light-adjusting member 3 can be partially provided above the light-emitting element 2 and partially provided in the gap between the light-emitting element 2, so that the light of the light of the light-emitting element 2 at a small angle is diverged while the light of the light of the light-emitting element 2 at a large angle can be converged, further reducing the brightness difference of the light-emitting element 2.

[0049] Of course, the light-emitting side of the light-emitting element 2 is separated by a first light-reflecting layer and a second light-reflecting layer. The light-adjusting members 3 are located in the first light-reflecting layer and the second light-reflecting layer, respectively. Each light-adjusting member 3 located in the first light-reflecting layer is aligned above the light-emitting element 2, while each light-adjusting member 3 located in the second light-reflecting layer is located between adjacent light-emitting elements 2. The light-adjusting members 3 in the first light-reflecting layer are used to diverge light from the light-emitting element 2 at a narrow angle, while the light-adjusting members 3 in the second light-reflecting layer are used to converge light from the light-emitting element 2 at a wide angle. The small distance between the first light-reflecting layer and the substrate 1 further ensures that the first light-reflecting layer can diverge light at a narrow angle.

[0050] Reference Figure 7 In some embodiments, the backlight module further includes a third light-reflecting layer, which is located on a side of the second light-reflecting layer away from the first light-reflecting layer. A plurality of light-adjusting members 3 are provided in the third light-reflecting layer, and each light-adjusting member 3 is provided between two adjacent light-emitting elements 2. The third light-reflecting layer is used to converge the already diverged light or the light that has not been converged, so as to further ensure the brightness difference of the light-emitting elements 2 and ensure the visual effect.

[0051] It should be noted that other components of the backlight module are known to those skilled in the art and will not be described in detail here.

[0052] Example 2

[0053] Reference Figure 1-Figure 7, the embodiment of the present application further provides a display device, including the backlight module provided by the aforementioned embodiment. The technical features of the backlight module can be referred to the above description and will not be described in detail here. Since the display device disclosed in the embodiment of the present application includes the backlight module provided by the aforementioned embodiment, the display device having the backlight module also has all the above technical effects, which will not be described in detail here. The other components of the display device are known to those of ordinary skill in the art and will not be described in detail here.

[0054] The display device may be a mobile phone, a tablet, a monitor, a television, a wearable electronic device, etc.

[0055] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0056] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0057] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A backlight module, characterized in that: include: A substrate, with a plurality of light-emitting elements distributed in an array provided on one side of the substrate; as well as A plurality of light adjustment members are located on the light-emitting side of the light-emitting element, and the light adjustment members are respectively located above two adjacent light-emitting elements to converge the light emitted by the light-emitting element; and / or the light adjustment members are correspondingly located above the light-emitting element to diverge the light emitted by the light-emitting element. The light adjustment member is provided with a through hole in the thickness direction of the substrate, and the two ends of the through hole are respectively a first opening and a second opening, and the end of the through hole close to the light-emitting element is the first opening. The light adjustment member is formed with a first light-transmitting portion and a second light-transmitting portion through the through hole, and the first light-transmitting portion and the second light-transmitting portion are both reflective surfaces on the sides facing each other. The light adjustment member is respectively located between two adjacent light-emitting elements, and the width of the first opening is smaller than the width of the second opening. The light adjustment member is correspondingly located above the light-emitting element, and the width of the first opening is larger than the width of the second opening.

2. The backlight module according to claim 1, wherein: The two reflective surfaces of the light adjustment member are arranged axially symmetrically with respect to the thickness direction of the substrate.

3. The backlight module according to claim 1, wherein: The reflective surface is an inclined surface or a curved surface.

4. The backlight module according to claim 1, wherein: At least one light adjustment member is disposed above the light emitting element, and at least one light adjustment member is disposed between two adjacent light emitting elements. The distance between each light adjustment member and the substrate is the same.

5. The backlight module according to claim 1, wherein: The light-emitting side of the light-emitting element is provided with a first light-reflecting layer and a second light-reflecting layer, and each of the light-adjusting components is respectively located in the first light-reflecting layer and the second light-reflecting layer. Each of the light-adjusting components located in the first light-reflecting layer is positioned above the light-emitting element, and each of the light-adjusting components located in the second light-reflecting layer is located between adjacent light-emitting elements.

6. The backlight module according to claim 5, wherein: It also includes a third light reflecting layer, which is located on the side of the second light reflecting layer away from the first light reflecting layer. A plurality of light adjusting components are arranged in the third light reflecting layer, and each light adjusting component is arranged between two adjacent light emitting elements.

7. A display device, characterized in that: include: The backlight module according to any one of claims 1 to 6.

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