Backlight module and display device

Abstract

This invention relates to a backlight module, comprising a back panel and a plurality of lamp panels, with a gap between adjacent lamp panels and a shielding member disposed between adjacent lamp panels. In a first direction parallel to the light-emitting surface of the lamp panels, the shielding member has two oppositely arranged insertion slots with opening directions opposite to each other, so that corresponding lamp panels are inserted into corresponding insertion slots. In the first direction, a first gap exists between the shielding member and the lamp panels. The shielding member is fixedly connected to the back panel. This invention also relates to a display device.

Description

Technical Field

[0001] This invention relates to the field of display product manufacturing technology, and in particular to a backlight module and a display device. Background Technology

[0002] Currently, conventionally designed MLED (Micro LED) light panel seam structures use reflective sheets attached to the light panel to extend to the seam and overlap to cover the seam, or a small reflective sheet is attached separately to the seam to cover it.

[0003] However, covering the seam with a reflective sheet has the following disadvantages:

[0004] 1) Whether the reflective sheets are spliced ​​together or applied separately, the reflective sheets at the seams are prone to collapse or lift up, resulting in uneven images at the seams.

[0005] 2) The protruding part of the overlapping reflector is prone to damage and deformation, resulting in a high rework rate;

[0006] 3) Applying a reflective sheet separately at the seam can easily cause the reflective sheet to break or be damaged during the expansion and contraction of the light panel, resulting in image failure. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a backlight module and a display device that solves the problem of seams between light panels.

[0008] To achieve the above objectives, the technical solution adopted in this embodiment of the invention is as follows: a backlight module, including a back plate and a plurality of lamp plates, with a gap between two adjacent lamp plates and a shielding member between two adjacent lamp plates. In a first direction parallel to the light-emitting surface of the lamp plate, the shielding member has two oppositely arranged insertion slots with the opening directions of the two insertion slots facing away from each other, so that the corresponding lamp plate is inserted into the corresponding insertion slot.

[0009] In the first direction, there is a first gap between the shielding member and the lamp panel;

[0010] The shielding component is fixedly connected to the back plate.

[0011] Optionally, the shielding member includes a first shielding plate, a second shielding plate, and a connecting plate connected between the first shielding plate and the second shielding plate, which are disposed opposite to each other.

[0012] The first shielding plate is located on the light-emitting side of the lamp panel, and the first shielding plate completely covers the gap;

[0013] The connecting plate is inserted into the gap, and there is the first gap between the connecting plate and any one of the two adjacent lamp panels;

[0014] The second shield is located on the backlight side of the lamp panel, and the second shield is connected to the back panel by an adhesive layer.

[0015] Optionally, the length 'a' of the first gap in the first direction satisfies the following formula: a > (δ1 + δ2) / 2, where,

[0016] δ1 is the expansion amount of the shielding component, δ1=L1*α1*△T+Tg1, L1 is the length of the first shielding plate or the connecting plate in the first direction, α1 is the expansion coefficient of the material of the shielding component, △T is the temperature difference change, and Tg1 is the material tolerance of the shielding component.

[0017] δ2 is the expansion amount of the lamp panel, δ2=L2*α2*△T+Tg2, where L2 is the length of the lamp panel in the first direction, α2 is the expansion coefficient of the lamp panel material, △T is the temperature difference change, and Tg2 is the material tolerance of the lamp panel.

[0018] Optionally, the first shielding plate includes a middle portion covering the gap and edge portions located on opposite sides of the middle portion in the first direction. The edge portions cover two adjacent lamp panels respectively. In the first direction, the length b of the edge portions satisfies the following formula: b>(δ3-δ4) / 2, where δ3 is the shrinkage amount of the shielding member, δ3=L3*α3*△T+Tg3, L3 is the length of the first shielding plate or the connecting plate in the first direction, α3 is the coefficient of thermal expansion of the material of the shielding member, △T is the temperature difference change, and Tg3 is the material tolerance of the shielding member.

[0019] δ4 is the shrinkage amount of the lamp panel, δ4=L4*α4*△T+Tg4, where L4 is the length of the lamp panel in the first direction, α4 ​​is the coefficient of thermal expansion of the lamp panel material, △T is the temperature difference change, and Tg4 is the material tolerance of the lamp panel.

[0020] Optionally, the side of the back panel connected to the lamp panel has a groove, and at least a portion of the second shield is embedded in the groove.

[0021] Optionally, the length of the second shield in the first direction is greater than or equal to the length of the gap in the first direction.

[0022] Optionally, a second gap exists between the first shield and the lamp panel in a direction perpendicular to the lamp panel.

[0023] Optionally, a third gap exists between the second shield and the lamp panel in a direction perpendicular to the lamp panel.

[0024] Optionally, in the first direction, the length of the second shield is greater than or equal to the length of the gap.

[0025] Optionally, the shielding element is made of a rigid material with a reflectivity greater than 85%.

[0026] This invention also provides a display device including the backlight module described above.

[0027] The beneficial effects of the present invention are: the problem of splicing seams of the light panel is solved by setting the shielding component, and the shielding component is fixedly connected to the backlight and has a first gap with the light panel, so that the shielding component and the light panel are set separately, which does not affect the expansion and contraction of the light panel, and the disassembly and assembly of the shielding component does not affect the quality of the light panel. Attached Figure Description

[0028] Figure 1 A schematic diagram of a backlight module in related technologies. Figure 1 ;

[0029] Figure 2 A schematic diagram of a backlight module in related technologies. Figure 2 ;

[0030] Figure 3 A schematic diagram of a backlight module in related technologies. Figure 3 ;

[0031] Figure 4 A schematic diagram of the backlight module in an embodiment of the present invention. Figure 1 ;

[0032] Figure 5 A schematic diagram of the backlight module in an embodiment of the present invention. Figure 2 . Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0034] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0035] Figure 1 In the process, the reflective sheets 2 on two adjacent light panels 1 extend to the seam (i.e., gap 10) and overlap each other to cover the gap 10. The extended part of the reflective sheet 2 of the light panel 1 is suspended at the gap 10, which is easy to break and deform, resulting in a high rework rate. Figure 2 In this case, a reflective sheet 3 is separately attached to the gap 10 between two adjacent light panels 1. During the expansion and contraction of the light panels 1, the reflective sheet 3 at the seam is easily broken or damaged, causing the image to malfunction; however, regardless of... Figure 1 The reflective sheets in the middle are spliced ​​together to cover the gap 10, or... Figure 2 Individual reflective sheets are applied to cover gap 10. The reflective sheets at gap 10 are prone to collapse or warping, resulting in uneven image quality at gap 10.

[0036] Figure 2 The backlight module shown has a small pitch (i.e., the distance between two adjacent LEDs 4 in the direction from one light panel to another). The edge of the light panel 1 is close to the LED, and there is no space to attach a reflective sheet (A < 1 mm). The gap 10 cannot be covered.

[0037] Figure 3 The backlight module shown includes a base plate 1 with multiple LEDs 4 on it. The side of the LEDs 4 away from the base plate is coated with a protective adhesive 8. A reflective sheet cannot be attached to the protective adhesive 8, and the gaps cannot be covered.

[0038] refer to Figure 4 and Figure 5To address the aforementioned issues, this embodiment provides a backlight module, including a backplate 7 and multiple lamp panels 1. A gap 10 exists between adjacent lamp panels 1, and a blocking member 6 is disposed between adjacent lamp panels 1 in a first direction parallel to the light-emitting surface of the lamp panel 1 (reference). Figure 4 In the X direction, the shielding member 6 has two C-shaped insertion slots arranged opposite to each other, with the opening directions of the two insertion slots facing away from each other, so that the corresponding lamp board 1 can be inserted into the corresponding insertion slot.

[0039] In the first direction, there is a first gap between the shielding member 6 and the lamp panel 1;

[0040] The shielding member 6 is fixedly connected to the back plate 7.

[0041] In a first direction parallel to the light-emitting surface of the lamp panel 1, the blocking member 6 has two oppositely arranged insertion slots with their opening directions facing away from each other, so that the corresponding lamp panel 1 is inserted into the corresponding insertion slot. In a direction perpendicular to the light-emitting surface of the lamp panel 1, the blocking member 6 is I-shaped, completely covering the gap 10, and the blocking member 6 is fixed to the back plate 7. In the first direction, there is a first gap between the blocking member 6 and the lamp panel 1, ensuring that the blocking member 6 and the lamp panel 1 are separately arranged and not fixedly connected by the lamp panel 1, and that there is a gap between them to avoid affecting the expansion and contraction of the lamp panel 1. Since the blocking member 6 is fixedly connected to the back plate 7, and the corresponding lamp panel 1 is inserted into the corresponding insertion slot, relative to... Figure 2 The reflector in the backlight module is not limited by the size of the lamp panel 1, and is relative to... Figure 3 The backlight module in the middle is not limited by the protective glue 8 and can completely cover the gap 10.

[0042] In this embodiment, the shielding component 6 is made of hard materials such as PC, which has high stability, is not easily deformed or damaged, and ensures stable image quality at the gaps.

[0043] It should be noted that, in order to maintain the same color as the light-emitting surface of the lamp panel 1, the surface of the shielding member 6 on the side away from the back plate 7 is white, which is the same color as the light-emitting surface of the lamp panel 1. However, this is not a limitation. For example, the material used for the shielding member 6 may be the same color as the light-emitting surface of the lamp panel 1, such as white.

[0044] It should be noted that the specific shape of the shielding member 6 can be set according to the number and arrangement of the lamp panels 1. For example, when the backlight module includes two lamp panels 1, the shielding member 6 is a strip structure, extending along the extension direction of the gap 10 between the two lamp panels 1. When the backlight module includes four lamp panels 1, the shielding member 6 can be an integral structure, in the form of a cross shape, as shown in the reference. Figure 5 When the backlight module includes two rows of lamp panels 1, and each row of lamp panels 1 includes at least one lamp panel 1, the blocking member 6 includes a first strip structure extending along the column direction, and a plurality of second strip structures spaced apart along the extension direction of the first strip structure, wherein the extension direction of the second strip structures is perpendicular to the extension direction of the first strip structure. When the backlight module includes two or more rows of lamp panels 1, and each row of lamp panels 1 includes two or more lamp panels 1, the blocking member 6 includes a first strip structure and a second strip structure that intersect to form a mesh structure.

[0045] For example, the shielding member between multiple light panels 1 can be an integral structure, such as Figure 5 The cross-shaped structure in the middle is a whole, and the shielding parts between multiple lamp panels 1 can be a split structure, that is, four split strip structures are connected to form a cross-shaped structure.

[0046] refer to Figure 4 In an exemplary embodiment, the shielding member 6 includes a first shielding plate 61, a second shielding plate 62 disposed opposite to each other, and a connecting plate 63 connecting the first shielding plate 61 and the second shielding plate 62.

[0047] The first shielding plate 61 is located on the light-emitting side of the lamp plate 1, and the first shielding plate 61 completely covers the gap 10;

[0048] The connecting plate 63 is inserted into the gap 10, and the connecting plate 63 has the first gap with either of the two adjacent lamp plates 1;

[0049] The second shielding plate 62 is located on the backlight side of the lamp panel 1, and the second shielding plate 62 is connected to the back plate 7 by an adhesive layer.

[0050] In the direction perpendicular to the light-emitting surface of the lamp panel 1, the cross section of the shielding member is I-shaped. The first shielding plate 61 is used to shield the gap 10 between two adjacent lamp panels 1. The second shielding plate 62 is used to fix the back plate 7 to fix the shielding member as a whole. The connecting plate 63 is inserted into the gap 10 to play a connecting role.

[0051] The second shielding plate 62 can be connected to the back plate 7 by an adhesive layer. The adhesive layer can be formed by coating liquid glue or by applying double-sided tape. As long as the connection between the shielding member and the back plate 7 can be achieved, there is no limitation.

[0052] refer to Figure 4 In an exemplary embodiment, the length 'a' of the first gap in the first direction satisfies the following formula: a > (δ1 + δ2) / 2, where,

[0053] δ1 is the expansion amount of the shielding component, δ1=L1*α1*△T+Tg1, L1 is the length of the first shielding plate 61 or the connecting plate 63 in the first direction, α1 is the expansion coefficient of the material of the shielding component, △T is the temperature difference change, and Tg1 is the material tolerance of the shielding component.

[0054] δ2 is the expansion amount of the lamp plate 1, δ2=L2*α2*△T+Tg2, L2 is the length of the lamp plate 1 in the first direction, α2 is the expansion coefficient of the material of the lamp plate 1, △T is the temperature difference change, and Tg2 is the material tolerance of the lamp plate 1.

[0055] The existence of the first gap avoids the setting of the shielding member as a reserved space for the expansion and contraction of the light panel 1, thus avoiding affecting the quality of the light panel 1.

[0056] The length 'a' of the first gap in the first direction can be obtained according to the formula for calculating the thermal expansion of the material, δ=L*α*△T+Tg. According to this formula, the expansion amount δ1 of the shielding component and the expansion amount δ2 of the lamp panel 1 can be obtained.

[0057] It should be noted that Tg1 is ±0.2mm and Tg2 is ±0.2mm, but these are not limits.

[0058] It should be noted that △T is obtained based on the actual application environment and the product reliability environment test temperature requirements. For example, for automotive projects, the temperature range is -45℃ to +95℃, the high temperature environment is 40℃ to 95℃, and the low temperature environment is -10℃ to -40℃. Therefore, △T is the difference between the high temperature environment and the low temperature environment.

[0059] The length a of the first gap in the first direction satisfies the following formula: a>(δ1+δ2) / 2, to prevent the lamp panel 1 from hitting the I-shaped shield during the expansion process.

[0060] In an exemplary embodiment, the first shielding plate 61 includes a middle portion covering the gap 10 and edge portions located on opposite sides of the middle portion in the first direction. The edge portions cover two adjacent lamp panels 1 respectively. In the first direction, the length b of the edge portions satisfies the following formula: b > (δ3 - δ4) / 2, where δ3 is the shrinkage amount of the shielding member, δ3 = L3 * α3 * ΔT + Tg3, L3 is the length of the first shielding plate 61 or the connecting plate 63 in the first direction, α3 is the coefficient of thermal expansion of the material of the shielding member, ΔT is the temperature difference change, and Tg3 is the material tolerance of the shielding member.

[0061] δ4 is the shrinkage amount of the lamp panel 1, δ4=L4*α4*△T+Tg4, L4 is the length of the lamp panel 1 in the first direction, α4 ​​is the coefficient of thermal expansion of the material of the lamp panel 1, △T is the temperature difference change, and Tg4 is the material tolerance of the lamp panel 1.

[0062] The length b of the edge portion can be obtained according to the formula for calculating the thermal expansion of the material, δ=L*α*△T+Tg. According to this formula, the shrinkage amount δ3 of the shielding component and the shrinkage amount δ4 of the lamp panel 1 can be obtained.

[0063] It should be noted that Tg3 is ±0.2mm and Tg4 is ±0.2mm, but these are not the limits.

[0064] It should be noted that △T is obtained based on the actual application environment and the product reliability environment test temperature requirements. For example, for automotive projects, the temperature range is -45℃ to +95℃, the high temperature environment is 40℃ to 95℃, and the low temperature environment is -10℃ to -40℃. Therefore, △T is the difference between the high temperature environment and the low temperature environment.

[0065] The length b of the edge portion satisfies the following formula b>(δ4-δ3) / 2, to avoid excessive shrinkage of the light panel 1, which would cause the seam to be exposed.

[0066] In some specific implementations, taking a 27-inch vehicle-mounted light as an example, the relevant parameters of the light panel 1 are: length L = 340mm, α = 1.2 * 10 -5 Tg = ±0.2mm; the relevant parameters of the shielding component are: length L = 5mm, α = 6.5*10 -5 Tg = ±0.2 mm.

[0067] △T=70℃ (room temperature 25℃, high temperature 95℃, temperature difference 70℃).

[0068] δ1 = 5 * 6.5 * 10 -5 *70 = 0.02275 mm;

[0069] Then δ2 = 340 * 1.2 * 10-5 *70=0.2856mm;

[0070] Based on a>(δ1+δ2) / 2, we obtain a>0.15mm.

[0071] δ3=5*6.5*10 -5 *70 = 0.02275 mm;

[0072] Therefore, δ4 = 340 * 1.2 * 10 -5 *70=0.2856mm;

[0073] Based on b>(δ4-δ3) / 2, we obtain b>0.13mm.

[0074] It should be noted that the calculations of a and b above ignore Tg, but this is not a limitation.

[0075] In an exemplary embodiment, the side of the back plate 7 connected to the lamp plate 1 has a groove 71, and at least a portion of the second shielding plate 62 is embedded in the groove 71.

[0076] If the orthographic projection of the gap 10 on the back plate 7 is located within the groove 71, and the area of ​​the orthographic projection of the gap 10 on the back plate 7 is less than or equal to the area of ​​the groove 71 (the area in the direction parallel to the back plate 7), then the second shielding plate 62 can be embedded in the groove 71 and fixedly connected to the back plate 7 by the adhesive layer provided at the bottom of the groove 71.

[0077] The groove 71 is designed to allow space to be cleared, so as to prevent interference between the shielding component and the lamp panel 1.

[0078] In some embodiments, after the shielding member is assembled with the lamp panel 1, the side of the second shielding plate 62 near the first shielding plate 61 is flush with the side of the back plate 7 near the lamp panel 1, or, in a direction perpendicular to the back plate 7, the side of the second shielding plate 62 near the first shielding plate 61 is lower than the side of the back plate 7 near the lamp panel 1, so as to effectively avoid interference between the shielding member and the lamp panel 1.

[0079] In an exemplary embodiment, the length of the second shield 62 in the first direction is greater than or equal to the length of the gap 10 in the first direction.

[0080] It should be noted that when the backlight module includes two rows of lamp panels 1, the shielding member includes a first strip structure extending along the column direction and a plurality of second strip structures arranged at intervals along the extension direction of the first strip structure. In this case, the assembly of the lamp panel 1 and the shielding member is simple. It is only necessary to insert the corresponding lamp panel 1 into the corresponding insertion slot 71 along the extension direction of the second strip structure. At this time, in the direction parallel to the light-emitting surface of the lamp panel 1 (i.e., the first direction), the length of the first shielding plate 61 is greater than the width of the gap 10. Since the first shielding plate 61 has already played the role of shielding the gap 10, the length of the second shielding plate 62 can be the same as or different from the length of the first shielding plate 61. The length of the second shielding plate 62 can be greater than the length of the gap 10, equal to the length of the gap 10, or less than the length of the gap 10. In some embodiments, since the second baffle plate 62 serves to fix the baffle member, in order to ensure the connection stability between the baffle member and the back plate 7, the length of the second baffle plate 62 in the first direction is greater than the length of the gap 10. In a specific embodiment, the length of the second baffle plate 62 in the first direction is equal to the length of the first baffle plate 61 in the first direction.

[0081] It should be noted that when the backlight module includes at least 3 rows of lamp panels 1, and each row of lamp panels 1 includes at least 2 lamp panels 1, and the shielding member is an integral structure, in order to facilitate the assembly of the lamp panels 1 and the shielding member, the length of the second shielding plate 62 in the first direction is less than or equal to the length of the gap 10. During assembly, along the direction perpendicular to the light-emitting surface of the lamp panel 1 and from the light-emitting surface of the lamp panel 1 to the backlight surface of the lamp panel 1, the shielding member is inserted into the gap 10 of the multiple lamp panels 1.

[0082] In an exemplary embodiment, for ease of installation, the distance between the first shielding plate 61 and the second shielding plate 62 in the direction perpendicular to the light-emitting surface of the lamp panel 1 is greater than the thickness of the lamp panel 1.

[0083] In some embodiments, a second gap is provided between the first shielding plate 61 and the light-emitting surface of the lamp plate 1 in a direction perpendicular to the light-emitting surface of the lamp plate 1, and / or a third gap is provided between the second shielding plate 62 and the backlight surface of the lamp plate 1, so as to reserve assembly gaps.

[0084] The specific settings of the second gap and the third gap can be set according to actual needs. For example, in the direction perpendicular to the light-emitting surface of the lamp panel 1, the width of the second gap is 0.05mm to 0.1mm, and / or, in the direction perpendicular to the light-emitting surface of the lamp panel 1, the width of the third gap is 0.05mm to 0.1mm, but not limited thereto.

[0085] In an exemplary embodiment, in the first direction, the length of the second shielding plate 62 is greater than or equal to the length of the gap 10, so as to effectively block the gap 10 between adjacent light panels 1.

[0086] In an exemplary embodiment, the shielding element is made of a rigid material with a reflectivity greater than 85%. While serving to block the gap 10, the shielding element also has a reflective effect to improve light efficiency.

[0087] This invention also provides a display device including the backlight module described above.

[0088] The display device can be any product or component with display function, such as an LCD TV, LCD monitor, digital photo frame, mobile phone, or tablet computer. The display device also includes a flexible circuit board, a printed circuit board, and a backplate 7.

[0089] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A backlight module, comprising a backplate and multiple lamp panels, characterized in that, There is a gap between two adjacent lamp panels, and a shielding member is provided between two adjacent lamp panels. In a first direction parallel to the light-emitting surface of the lamp panel, the shielding member has two oppositely arranged insertion slots with the opening directions of the two insertion slots facing away from each other, so that the corresponding lamp panel can be inserted into the corresponding insertion slot. In the first direction, there is a first gap between the shielding member and the lamp panel; The shielding component is fixedly connected to the back plate; The shielding component includes a first shielding plate, a second shielding plate, and a connecting plate connected between the first shielding plate and the second shielding plate, which are disposed opposite to each other. The first shielding plate is located on the light-emitting side of the lamp panel, and the first shielding plate completely covers the gap; The connecting plate is inserted into the gap, and there is the first gap between the connecting plate and any one of the two adjacent lamp panels; The second shield is located on the backlight side of the lamp panel, and the second shield is connected to the back panel by an adhesive layer; The length 'a' of the first gap in the first direction satisfies the following formula: a > (δ1 + δ2) / 2, where, δ1 is the expansion amount of the shielding component, δ1=L1* α1 * △T + Tg1, where L1 is the length of the connecting plate in the first direction, α1 is the expansion coefficient of the material of the shielding component, △T is the temperature difference change, and Tg1 is the material tolerance of the shielding component. δ2 is the expansion amount of the lamp panel, δ2=L2* α2 * ΔT + Tg2, where L2 is the length of the lamp panel in the first direction, α2 is the expansion coefficient of the lamp panel material, ΔT is the temperature difference change, and Tg2 is the material tolerance of the lamp panel.

2. The backlight module according to claim 1, characterized in that, The side of the back panel that connects to the light panel has a groove, and at least a portion of the second shielding plate is embedded in the groove.

3. The backlight module according to claim 1, characterized in that, The length of the second shield in the first direction is greater than or equal to the length of the gap in the first direction.

4. The backlight module according to claim 1, characterized in that, In a direction perpendicular to the lamp panel, there is a second gap between the first shielding plate and the lamp panel.

5. The backlight module according to claim 1, characterized in that, In a direction perpendicular to the lamp panel, there is a third gap between the second shield and the lamp panel.

6. The backlight module according to claim 1, characterized in that, In the first direction, the length of the second shield is greater than or equal to the length of the gap.

7. The backlight module according to claim 1, characterized in that, The shielding component is made of a hard material with a reflectivity greater than 85%.

8. A display device, characterized in that, Includes the backlight module as described in any one of claims 1-7.

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