Three-dimensional reflector plate for reducing mini-LED backlight halo

Abstract

The invention relates to the technical field of mini-LEDs, and provides a three-dimensional reflector plate for reducing mini-LED backlight halo, which comprises a plurality of integrally connected reflecting covers, and each reflecting cover comprises a reflecting bottom surface with an avoiding hole in the center; the reflection side face is connected to the edge of the reflection bottom face in the circumferential direction of the reflection bottom face, and a cup-shaped cover body space is defined by the reflection bottom face and the reflection side face; the adjacent reflecting covers are connected through reflecting side surfaces, and the reflecting bottom surfaces and the reflecting side surfaces are integrally connected, so that the three-dimensional reflecting sheet forms an integral structure; the three-dimensional reflector plate can process light from multiple directions at the same time, light beams can be prevented from entering other control areas through the reflecting side faces, light leakage is reduced, and halo is reduced.

Description

Technical Field

[0001] The present application relates to the field of mini-LED technology, and more specifically, to a three-dimensional reflective sheet for reducing mini-LED backlight halo. Background Art

[0002] Mini Light Emitting Diode (mini-LED) chips are environmentally friendly, have high brightness, low energy consumption, long life, and low operating voltage. They have been widely used in displays of electronic products such as mobile phones, televisions, and computers.

[0003] In the mini-LED field, mini-LED light groups and other components are installed on the PCB (Printed Circuit Board). Reflective sheets covering other components are usually laid on the PCB to reduce light loss and diffuse reflection on other components.

[0004] In traditional technology, the reflector has a planar structure. When performing local dimming, light is easily reflected by the reflector to other control areas, causing light leakage and halos in other control areas, affecting the display effect.

[0005] Therefore, the existing technology still needs to be improved and developed. Summary of the Invention

[0006] The purpose of this application is to propose a three-dimensional reflective sheet for reducing mini-LED backlight halo, so as to solve the technical problem in the prior art that light is easily reflected by the reflective sheet to other control areas, resulting in halo in other control areas.

[0007] To achieve the above objectives, the technical solution adopted in this application is to provide a three-dimensional reflective sheet for reducing mini-LED backlight halo, wherein the mini-LED backlight includes a PCB board and a mini-LED lamp group arranged on the PCB board. The three-dimensional reflective sheet is used to be mounted on the PCB board and includes a plurality of integrally connected reflective covers, each of which includes:

[0008] Reflective bottom surface with a avoidance hole in the center;

[0009] a reflective side surface, the reflective side surface being connected to an edge of the reflective bottom surface along a circumferential direction of the reflective bottom surface, the reflective bottom surface and the reflective side surface enclosing a cup-shaped cover space;

[0010] Adjacent reflective covers are connected via the reflective side surfaces, and the reflective bottom surface and the reflective side surfaces are integrally connected, so that the three-dimensional reflective sheet is constructed into an integral structure;

[0011] Among them, when the reflective bottom surface abuts against the PCB board, the mini-LED lamp group passes through the avoidance hole and is accommodated in the cover space, the reflective bottom surface is located below the mini-LED lamp group, and the reflective side surface is located on the side of the mini-LED lamp group.

[0012] Furthermore, a first angle is formed between the reflective side surface and the reflective bottom surface, and the first angle is any angle value in the range of 90° to 120°.

[0013] Furthermore, with the reflective bottom surface as a reference plane, the height of the reflective side surface is not lower than the height of the mini-LED lamp group.

[0014] In some embodiments, the height of the reflective side surface is 2 mm to 7 mm higher than the height of the mini-LED lamp group.

[0015] Furthermore, each of the reflective covers includes a plurality of planar reflective side surfaces, and the plurality of reflective side surfaces are sequentially connected along the circumference of the reflective bottom surface;

[0016] Alternatively, the reflective side surface is a cylindrical surface or a truncated cone surface, the reflective bottom surface is connected to an opening at one end of the reflective side surface, and the area of the opening at the other end of the reflective bottom surface is not less than the area of the reflective bottom surface.

[0017] In some embodiments, a transition surface is connected between the adjacent reflective side surfaces of the reflective cover, and the transition surface is integrally connected to the reflective side surface and is parallel to the reflective bottom surface.

[0018] Furthermore, the transition surface and the adjacent reflective side surface are enclosed to form a dome shape with a weight-reducing space.

[0019] In some embodiments, the transition surface, the reflective side surface, and the reflective bottom surface have the same thickness;

[0020] Alternatively, the thickness of the transition surface is greater than the thickness of the reflective side surface and the reflective bottom surface.

[0021] Furthermore, the reflective bottom surface and the reflective side surface both include a stacked substrate layer and a reflective coating layer, and the reflective coating layer faces the mini-LED lamp group in the cover space.

[0022] In some embodiments, the plurality of reflective covers on the three-dimensional reflective sheet are arranged in an array.

[0023] The beneficial effects of the three-dimensional reflective sheet provided in this application for reducing the halo of mini-LED backlight are at least as follows: through the three-dimensional cup-shaped three-dimensional reflective sheet, light can be guided and focused more accurately, thereby achieving a more ideal beam distribution. This design can reduce light loss and improve light output efficiency; the three-dimensional reflective sheet can evenly distribute light in the required area, reducing shadows and hot spots; the three-dimensional reflective sheet can process light from multiple directions at the same time, and can block light beams from entering other control areas by reflecting the side, reducing light leakage and reducing halo. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A stereoscopic image of a three-dimensional reflective sheet for reducing mini-LED backlight halo provided in an embodiment of the present application;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the reflector on the three-dimensional reflector;

[0027] Figure 3 Another stereoscopic image of a three-dimensional reflective sheet for reducing mini-LED backlight halo provided in an embodiment of the present application;

[0028] Figure 4 for Figure 3 Schematic diagram of the structure of the reflector on the three-dimensional reflector;

[0029] Figure 5 for Figure 1 A side cross-sectional view of the three-dimensional reflective sheet;

[0030] Figure 6 for Figure 5 Schematic diagram of the three-dimensional reflector when it is set on the PCB board;

[0031] Figure 7 is a side cross-sectional view of another three-dimensional reflective sheet;

[0032] Figure 8 is a side cross-sectional view of yet another three-dimensional reflective sheet;

[0033] Figure 9 Schematic diagram of the structure of the substrate layer and reflective coating on the reflector.

[0034] Among them, the reference numerals in the figures are:

[0035] 1. Three-dimensional reflective sheet;

[0036] 2. Reflector;

[0037] 3. Reflective bottom surface; 31. Avoidance hole;

[0038] 4. Reflective side;

[0039] 5. Cover space;

[0040] 6. Transition surface;

[0041] 7. Weight reduction space;

[0042] 8. Substrate layer;

[0043] 9. Reflective coating;

[0044] 10. PCB board;

[0045] 101. mini-LED light set. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0047] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0048] It should be noted that the mini-LED backlight panel is mainly composed of a PCB board and a mini-LED lamp group. The mini-LED lamp group is arranged on the PCB board and electrically connected to the light-emitting circuit on the PCB board. At the same time, the PCB board not only provides a platform for electrical connection, but also carries various types of electronic components, such as resistors, capacitors, inductors, crystals, connectors, sensors, electromechanical components, etc. Therefore, the surface of the PCB board is not smooth. When the mini-LED lamp group emits light, the light beam is mainly emitted toward the light-emitting front, but it will also be emitted to the surroundings and bottom of the mini-LED lamp group. This part of the light beam is easily scattered, causing light loss and diffuse reflection.

[0049] In the existing technology, a reflective sheet covering other components is usually laid on the PCB board to reduce light loss and diffuse reflection on other components. The reflective sheet is a flat plate. When the reflective sheet is laid on the PCB board, the light beam emitted by the mini-LED lamp group to the bottom will be reflected by the flat reflective sheet to reduce diffuse reflection and light loss.

[0050] However, the light beam reflected by the flat reflective sheet can easily be reflected to other control areas by the reflective sheet, resulting in light leakage and halos in other control areas, affecting the display effect, especially when performing local dimming. For example, the mini-LED backlight panel includes adjacent control areas A and B. The requirement for local dimming is that control area A emits light and control area B does not emit light. From the display, it can be seen that control area A displays color and control area B displays black. If the reflective sheet is set as a flat panel, the light beam in control area A can easily be reflected to the adjacent control area B, generating a halo in control area B. The black display in control area B will not be black enough, reducing the display effect.

[0051] To solve the above problems, the following describes a three-dimensional reflective sheet for reducing mini-LED backlight halo according to an embodiment of the present application in conjunction with the accompanying drawings.

[0052] See also Figure 1 and Figure 3 , Figure 1 and Figure 3 A schematic structural diagram of a three-dimensional reflective sheet for reducing mini-LED backlight halo according to the present application is shown.

[0053] See Figure 5 The mini-LED backlight includes a PCB board 10 and a mini-LED lamp group 101 arranged on the PCB board 10. The three-dimensional reflective sheet 1 is installed on the PCB board 10 and includes a plurality of integrally connected reflective covers 2. Figures 1-8 Each reflector 2 includes a reflective bottom surface 3 and a reflective side surface 4. The reflective bottom surface 3 is used to reflect the light beam emitted toward the bottom by the mini-LED lamp group 101, and the reflective side surface 4 is used to reflect the light beam emitted toward the side by the mini-LED lamp group 101.

[0054] Specifically, an avoidance hole 31 is opened in the center of the reflective bottom surface 3, and the reflective side surface 4 is connected to the edge of the reflective bottom surface 3 along the circumference of the reflective bottom surface 3. The reflective bottom surface 3 and the reflective side surface 4 enclose a cup-shaped cover space 5. Adjacent reflective covers 2 are connected through the reflective side surface 4. The reflective bottom surface 3 and the reflective side surface 4 are connected as a whole, so that the three-dimensional reflective sheet 1 is constructed into an integrated structure.

[0055] Among them, see Figure 5 When the reflective bottom surface 3 abuts against the PCB board 10, the mini-LED lamp group 101 passes through the avoidance hole 31 and is accommodated in the cover space 5. The reflective bottom surface 3 is located below the mini-LED lamp group 101, and the reflective side surface 4 is located on the side of the mini-LED lamp group 101.

[0056] The three-dimensional cup-shaped reflective sheet 1 can guide and focus light more accurately, thereby achieving a more ideal beam distribution. This design can reduce light loss and improve light output efficiency; the three-dimensional reflective sheet 1 can evenly distribute light in the required area, reducing shadows and hot spots; the three-dimensional reflective sheet 1 can process light from multiple directions at the same time, and can block light beams from entering other control areas by reflecting the side surface 4, reducing light leakage and reducing halos.

[0057] In some embodiments, the three-dimensional reflective sheet 1 is made of a plate material by stamping, and a mold and a punch are used to form a plurality of cup-shaped reflective covers 2 on the plate material.

[0058] The die includes an upper die (punch) and a lower die (die). The lower die is cup-shaped and determines the shape of the reflector 2 formed after punching.

[0059] When manufacturing the three-dimensional reflective sheet 1, the mold is mounted on a punch press, and the punch press parameters, such as pressure and speed, are adjusted to match the required punching conditions. The sheet is then fed into the punch press, and the upper and lower dies cooperate to punch and form the sheet.

[0060] It can be found that the various parts of the three-dimensional reflector 1 are integrally formed, that is, no additional connectors are required to fix the various parts. When in use, the three-dimensional reflector 1 can be directly placed on the PCB board 10 without the need for a separate installation step. It is easy to use and easy to transport and store.

[0061] Furthermore, a pre-design can be made based on the layout of the mini-LED lamp group 101 on the actually installed PCB board 10, and a three-dimensional reflector 1 can be manufactured according to the pre-design. The manufactured three-dimensional reflector 1 can be directly applied to the PCB board 10.

[0062] In addition, the three-dimensional reflective sheet 1 of the present application is different from the reflective base currently in use. The general structure of the reflective base includes a base, a reflective surface, a support structure and an installation interface. That is to say, each mini-LED lamp group 101 on the PCB board 10 needs to be installed with a separate reflective base, the base of which has a thicker support structure and requires an installation interface to be fixed to the PCB board 10.

[0063] It can be found that the three-dimensional reflective sheet 1 of the present application has the following differences and advantages compared to the reflective base (also called reflector or reflective cup): the reflective sheet can more easily adapt to different lamp shapes and sizes, providing greater design flexibility. In contrast, the reflective base usually has a fixed geometric shape and a smaller range of applicability.

[0064] The three-dimensional reflective sheet 1 is thinner and lighter than the reflective base, which helps to manufacture a more compact and lightweight lamp.

[0065] The manufacturing cost of the three-dimensional reflective sheet 1 is lower, especially for mass production applications. In addition, due to its lightweight characteristics, the three-dimensional reflective sheet 1 may also reduce transportation costs and the total cost of the final product.

[0066] The three-dimensional reflective sheet 1 can usually be directly attached or installed inside the lamp, simplifying the installation process. If maintenance or replacement is required, the three-dimensional reflective sheet 1 can be operated more conveniently without disassembling the entire reflective base structure.

[0067] The three-dimensional reflector 1 design allows for better air circulation, thereby improving the heat dissipation performance of the LED light group.

[0068] In some embodiments, see Figure 6 There is a first angle between the reflective side surface 4 and the reflective bottom surface 3, and the first angle is α, wherein the first angle α refers to the angle between the reflective side surface 4 and the reflective bottom surface 3 toward the direction of the lampshade space.

[0069] In some embodiments, see Figure 8 , the first angle α is 90°, of course, see Figure 6 , the first angle α may also be 115°. Further, the first angle α is any angle value in the range of 90° to 120°.

[0070] Further, see Figure 5 , taking the reflective bottom surface 3 as the reference plane, the height of the reflective side surface 4 is not lower than the height of the mini-LED lamp group 101.

[0071] It can be understood that in the backlight module, the mini-LED lamp group 101 is set on the PCB board 10, and modules such as a diffusion plate and a display screen are set at a certain distance in the light-emitting direction of the mini-LED lamp group 101. After the light of the mini-LED lamp group 101 is irradiated on the diffusion plate, the image is displayed on the display screen after processing.

[0072] Setting the height of the reflective side 4 higher than the height of the mini-LED lamp group 101 can reflect more light emitted to the side by the mini-LED lamp group 101 to prevent the light from entering other control areas, further reducing the risk of halos in other control areas.

[0073] In some embodiments, the height of the reflective side 4 is 2 mm to 7 mm higher than the height of the mini-LED lamp group 101 .

[0074] Among them, the distance between the diffuser plate and the mini-LED lamp group 101 is pre-designed, and the distance is generally 5-10 mm. The mini-LED lamp group 101 itself has a certain height. Therefore, the height of the reflective side 4 is 2 mm-7 mm higher than the height of the mini-LED lamp group 101.

[0075] Furthermore, the top of the three-dimensional reflective sheet 1 stops on the diffuser plate. For example, the distance between the diffuser plate and the mini-LED lamp group 101 is 10 mm, the height of the mini-LED lamp group 101 itself is 3 mm, and the height of the reflective side 4 is 7 mm higher than the height of the mini-LED lamp group 101. That is, the top of the three-dimensional reflective sheet 1 stops on the diffuser plate, and each reflective cover 2 in the three-dimensional reflective sheet 1 forms a relatively sealed control area with the diffuser plate. The light beams in this part of the control area can be reflected by the reflective side 4 and the reflective bottom surface 3, and are all emitted from the light-emitting front to the diffuser plate, and there will be no light leakage.

[0076] Of course, the top of the three-dimensional reflective sheet 1 may not only rest on the diffuser plate. For example, the distance between the diffuser plate and the mini-LED lamp group 101 is 10 mm, the height of the mini-LED lamp group 101 itself is 3 mm, and the height of the reflective side 4 is 5 mm higher than the height of the mini-LED lamp group 101. That is, the top of the three-dimensional reflective sheet 1 does not only rest on the diffuser plate and there is a 2 mm gap between it and the diffuser plate. The light beams in this part of the control area can basically be reflected by the reflective side 4 and the reflective bottom surface 3, and are all emitted from the light-emitting front to the diffuser plate. Compared with a planar reflective sheet, the risk of light entering other control areas can be greatly reduced.

[0077] In some embodiments, see Figure 1 、 Figure 2 、 Figure 5-Figure 9Each reflector 2 includes a plurality of planar reflective side surfaces 4, and the plurality of reflective side surfaces 4 are sequentially connected along the circumference of the reflective bottom surface 3;

[0078] Further, see Figure 3 and Figure 4 The reflective side surface 4 is a cylindrical surface or a truncated cone surface, the reflective bottom surface 3 is connected to an opening at one end of the reflective side surface 4, and the area of the opening at the other end of the reflective bottom surface 3 is not less than the area of the reflective bottom surface 3.

[0079] Furthermore, the curved surface design of the three-dimensional reflector 1 can be a complex geometric shape such as a parabola, an ellipse, or a cone, depending on the desired light beam distribution pattern.

[0080] See Figure 1 、 Figure 2 、 Figure 5-Figure 9 The multiple reflective side surfaces 4 adopt a polyhedron structure with four planar reflective side surfaces 4. The multiple reflective surfaces work together to optimize the light path and achieve an ideal lighting effect.

[0081] In some embodiments, the reflective side surface 4 is provided with a texture or pattern to further adjust the directionality and diffusion of the light. For example, the side of the reflective side surface 4 near the light assembly is provided with a threaded surface of a Fresnel lens to organize the light beam so that the light beam emitted from the three-dimensional reflective sheet 1 is close to the PCB board 10.

[0082] In some embodiments, see Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 、 Figure 8 and Figure 9 A transition surface 6 connects the reflective side surfaces 4 of adjacent reflectors 2. The transition surface 6 is integrally connected to the reflective side surfaces and is parallel to the reflective bottom surface 3. From a processing perspective, the reflectors 2 are formed by stamping the sheet material, while the transition surface 6 is the unstamped portion of the sheet material. The purpose of providing the transition surface 6 is to improve the structural strength of the entire three-dimensional reflective sheet 1. The transition surface 6 not only serves as a connection but also serves as a support beam between the reflectors 2, thereby improving the three-dimensional reflective sheet 1's resistance to compression and deformation.

[0083] Furthermore, the transition surface 6 is parallel to the reflective bottom surface 3 , so that in some cases the transition surface 6 can be smoothly stopped on the diffuser plate, and a table structure is formed between the transition surface 6 and the adjacent reflective side surface 4 , which has high structural strength.

[0084] Further, see Figure 1 、 Figure 5 、 Figure 6 、 Figure 8 and Figure 9The transition surface 6 and the adjacent reflective side surface 4 are formed into a dome-shaped space with a weight-reducing space 7. Specifically, the transition surface 6 and the reflective side surface 4 are hollowed out on the side facing the PCB board 10, making the three-dimensional reflective sheet 1 thinner and lighter, thereby reducing weight. Furthermore, the hollowed-out weight-reducing space 7 facilitates air flow and facilitates heat dissipation for the mini-LED lamp assembly 101.

[0085] Furthermore, the transition surface 6 , the reflective side surface 4 and the reflective bottom surface 3 have the same thickness.

[0086] In some embodiments, the thickness of the transition surface 6 is greater than the thickness of the reflective side surface 4 and the reflective bottom surface 3 .

[0087] According to application requirements, the thickness of each part of the three-dimensional reflective sheet 1 can be set to be the same or different, ensuring sufficient mechanical strength to support the three-dimensional structure while maintaining lightweight.

[0088] When the thickness of the transition surface 6 is greater than the thickness of the reflective side surface 4 and the reflective bottom surface 3 , it is equivalent to that the strength of the support beams between the reflective covers 2 is higher, which can improve the overall strength of the three-dimensional reflective sheet 1 .

[0089] In some embodiments, see Figure 9 The reflective bottom surface 3 and the reflective side surface 4 both include a stacked substrate layer 8 and a reflective coating 9 , and the reflective coating 9 faces the mini-LED lamp group 101 in the cover space 5 .

[0090] The base material of the substrate layer 8 includes plastic (such as polycarbonate PC, acrylic PMMA) and metal (such as aluminum). These materials have good processing properties and can provide high reflectivity.

[0091] Furthermore, in order to achieve high reflectivity, the surface of the substrate layer 8 is subjected to silver plating, aluminum plating or other metallization treatments, or a white high-reflective paint is used to form a reflective coating 9 .

[0092] The surface of the reflective coating 9 is smooth, and high-quality surface treatment is essential to reduce light scattering and loss, so it is necessary to ensure that the surface is smooth and free of defects.

[0093] Further, see Figure 1 and Figure 3 , multiple reflective covers 2 on the three-dimensional reflective sheet 1 are arranged in an array.

[0094] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A three-dimensional reflective sheet for reducing halo in a mini-LED backlight, wherein the mini-LED backlight comprises a PCB board and a mini-LED lamp assembly disposed on the PCB board, characterized in that: The three-dimensional reflector is used to be mounted on a PCB board and includes a plurality of integrally connected reflective covers, each of which includes: Reflective bottom surface with a avoidance hole in the center; a reflective side surface, the reflective side surface being connected to an edge of the reflective bottom surface along a circumferential direction of the reflective bottom surface, the reflective bottom surface and the reflective side surface enclosing a cup-shaped cover space; Adjacent reflective covers are connected via the reflective side surfaces, and the reflective bottom surface and the reflective side surfaces are integrally connected, so that the three-dimensional reflective sheet is constructed into an integral structure; Among them, when the reflective bottom surface abuts against the PCB board, the mini-LED lamp group passes through the avoidance hole and is accommodated in the cover space, the reflective bottom surface is located below the mini-LED lamp group, and the reflective side surface is located on the side of the mini-LED lamp group.

2. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, characterized in that: There is a first angle between the reflective side surface and the reflective bottom surface, and the first angle is any angle value in the range of 90° to 120°.

3. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, characterized in that: Taking the reflective bottom surface as a reference plane, the height of the reflective side surface is not lower than the height of the mini-LED lamp group.

4. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 3, characterized in that: The height of the reflective side surface is 2 mm to 7 mm higher than the height of the mini-LED lamp group.

5. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, characterized in that: Each of the reflective covers comprises a plurality of planar reflective side surfaces, wherein the plurality of reflective side surfaces are sequentially connected along the circumference of the reflective bottom surface; Alternatively, the reflective side surface is a cylindrical surface or a truncated cone surface, the reflective bottom surface is connected to an opening at one end of the reflective side surface, and the area of the opening at the other end of the reflective bottom surface is not less than the area of the reflective bottom surface.

6. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, wherein: A transition surface is connected between the adjacent reflective side surfaces of the reflective covers. The transition surface is integrally connected to the reflective side surfaces and is parallel to the reflective bottom surface.

7. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 6, characterized in that: The transition surface and the adjacent reflective side surface are arranged to form a dome shape with a weight-reducing space.

8. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 6, wherein: The transition surface, the reflective side surface and the reflective bottom surface have the same thickness; Alternatively, the thickness of the transition surface is greater than the thickness of the reflective side surface and the reflective bottom surface.

9. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, wherein: The reflective bottom surface and the reflective side surface both include a stacked substrate layer and a reflective coating layer, and the reflective coating layer faces the mini-LED lamp group in the cover space.

10. The three-dimensional reflective sheet for reducing mini-LED backlight halo according to claim 1, wherein: The multiple reflective covers on the three-dimensional reflective sheet are arranged in an array.

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