Backlight module and its manufacturing method and display device

Abstract

The present invention relates to a backlight module, a preparation method thereof and a display device. The backlight module comprises: at least two adjacent light boards; the light board comprises a substrate, a light-emitting element and a retaining wall structure, the light-emitting element and the retaining wall structure are respectively located on the substrate and are located on the same side of the substrate; a gap is provided between the substrates of two adjacent light boards; an adjustment member is at least partially provided in the gap; the material properties of the adjustment member are substantially the same as the material properties of the retaining wall structure. According to the embodiments of the present invention, it is helpful to reduce or eliminate the joint shadow and improve the display effect.

Description

Technical Field

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

[0002] In the related art, the backlight module is an important component of the liquid crystal display device, and the backlight module is used to provide sufficient and uniform surface light source for the liquid crystal display device. Generally, the backlight module is divided into an edge-entry backlight module and a direct-type backlight module, wherein the direct-type backlight module may include a plastic frame, a back plate, a light source, a diffusion plate, and an optical film material, etc. Among them, the light source is located below the diffusion plate. The light emitted by the light source is transmitted through the diffusion plate and irradiated onto the liquid crystal display panel. Summary of the invention

[0003] The present invention provides a backlight module and a manufacturing method thereof and a display device to solve the deficiencies in the related art.

[0004] According to a first aspect of an embodiment of the present invention, there is provided a backlight module, comprising: at least two adjacently arranged light panels;

[0005] The light board comprises a substrate, a light-emitting element and a retaining wall structure, wherein the light-emitting element and the retaining wall structure are respectively located on the substrate and on the same side of the substrate; a gap is provided between the substrates of two adjacent light boards;

[0006] an adjusting member, at least partially disposed in the gap;

[0007] The material properties of the adjusting member are substantially the same as those of the retaining wall structure.

[0008] In one embodiment, the material property includes reflectivity;

[0009] The reflectivity of the adjusting member is greater than or equal to 90%, and the reflectivity of the retaining wall structure is greater than or equal to 90%.

[0010] In one embodiment, when the reflectivity of the adjusting member is greater than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a convex surface; and / or,

[0011] When the reflectivity of the adjusting member is equal to the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a plane; and / or,

[0012] When the reflectivity of the adjusting member is less than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a concave surface.

[0013] In one embodiment, the material property includes color, the color of the adjusting member is white, the color of the retaining wall structure is white,

[0014] The color coordinates of the color of the adjusting member are substantially the same as the color coordinates of the color of the retaining wall structure.

[0015] In one embodiment, the material of the adjusting member includes titanium dioxide and / or zinc oxide, and the material of the retaining wall structure includes titanium dioxide and / or zinc oxide.

[0016] In one embodiment, the height of the adjusting member is greater than the thickness of the substrate;

[0017] In the width direction of the gap, the width of the first end of the adjusting member is greater than the width of the second end, wherein the first end is located outside the gap and the second end is located inside the gap;

[0018] In the width direction of the gap, the width of the first end of the adjusting member is greater than the width of the gap;

[0019] The orthographic projection of the first end of the adjusting member on the base plate overlaps with the orthographic projection of the retaining wall structure on the base plate.

[0020] In one embodiment, the adjusting member is made of elastic material.

[0021] In one embodiment, the adjusting member is an integrally formed structure, or a split structure.

[0022] In one embodiment, the retaining wall structure is a grid-like structure, the retaining wall structures are respectively arranged on both sides of the gap, and the shape of the surface of the adjusting member facing the retaining wall structure is complementary to the shape of the surface of the retaining wall structure facing the adjusting member;

[0023] The surface of the adjusting member facing the retaining wall structure is in contact with the surface of the retaining wall structure facing the adjusting member;

[0024] The surface of the retaining wall structure facing the adjusting member is a curved surface, and the surface of the adjusting member facing the retaining wall structure is a curved surface.

[0025] In one embodiment, the height of the retaining wall structure is greater than the height of the light emitting element;

[0026] The height of the adjusting member is less than or equal to the maximum distance between a surface of the retaining wall structure away from the substrate and a surface of the substrate away from the retaining wall structure.

[0027] In one embodiment, the height of the light emitting element is 100-150 microns, the height of the retaining wall structure is 200-300 microns, and the height of the adjusting member is 100-300 microns.

[0028] In one embodiment, the height of the retaining wall structure is less than the height of the light emitting element;

[0029] The height of the adjusting member is greater than or equal to the maximum distance between a surface of the retaining wall structure away from the substrate and a surface of the substrate away from the retaining wall structure.

[0030] In one embodiment, the light panel further comprises a transparent protective layer, and the transparent protective layer is located on the light emitting element;

[0031] The height of the adjusting member is less than or equal to the maximum distance between a surface of the transparent protective layer away from the substrate and a surface of the substrate away from the transparent protective layer.

[0032] According to a second aspect of an embodiment of the present invention, a display device is provided, comprising a display panel and the above-mentioned backlight module.

[0033] According to a third aspect of an embodiment of the present invention, a method for preparing a backlight module is provided, wherein the backlight module comprises: at least two light panels and an adjustment member; the method comprises:

[0034] At least two of the light boards are arranged adjacent to each other; wherein the light board comprises a substrate, a light-emitting element and a retaining wall structure, the light-emitting element and the retaining wall structure are respectively located on the substrate and on the same side of the substrate; a gap is arranged between the substrates of two adjacent light boards;

[0035] At least a portion of the adjusting member is placed in the gap; wherein the material properties of the adjusting member are substantially the same as the material properties of the retaining wall structure.

[0036] According to the above embodiments, since a gap is provided between the substrates of two adjacent light boards, at least a portion of the adjusting member is provided in the gap, and the material properties of the adjusting member are substantially the same as the material properties of the retaining wall structure of the light board. Therefore, when the backlight module provides backlight, the backlight brightness at the gap will be close to the backlight brightness at the light board, which is beneficial to reduce or eliminate the dark shadows of the joints and improve the display effect.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] Figure 1 is a top view of a backlight module according to an embodiment of the present invention;

[0040] Figure 2 is a cross-sectional view of a backlight module according to an embodiment of the present invention;

[0041] Figure 3 is a schematic structural diagram of an adjusting member according to an embodiment of the present invention;

[0042] Figure 4 is a schematic diagram of the arrangement of a light panel according to an embodiment of the present invention;

[0043] Figure 5 is a cross-sectional view of another backlight module according to an embodiment of the present invention;

[0044] Figure 6 The figure is a flow chart of a method for preparing a backlight module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0046] When the light source in the backlight module of the display device is MiniLED (sub-millimeter light emitting diode), issues such as manufacturing process yield and heat dissipation are taken into consideration. Since the backlight module of a large-size display device is formed by splicing multiple sub-modules, the inventors found that the brightness of the backlight provided by this backlight module at the position corresponding to the seam is different from the brightness at other positions, which will cause a seam shadow and affect the display effect.

[0047] like Figure 1-2 As shown, an embodiment of the present invention provides a backlight module. Figure 1 It is a top view of the backlight module. Figure 2 for Figure 1 The cross-sectional view along the section line AA′. The backlight module comprises: at least two light panels 11 and an adjusting member 12 .

[0048] In this embodiment, if Figure 1 As shown, at least two light panels 11 are arranged adjacent to each other.

[0049] In this embodiment, if Figure 2As shown, each lamp board 11 includes a substrate 111, a light emitting element 112 and a retaining wall structure 113. The light emitting element 112 and the retaining wall structure 113 are respectively located on the substrate 111 and on the same side of the substrate 111. The substrates 111 of two adjacent lamp boards 11 are arranged at intervals, that is, a gap is arranged between the substrates 111 of two adjacent lamp boards 11, and at least a part of the adjusting member 12 is arranged in the gap.

[0050] In this embodiment, the material properties of the adjusting member 12 are substantially the same as the material properties of the retaining wall structure 113 .

[0051] In this embodiment, since two adjacent lamp boards 11 are arranged adjacent to each other, a gap is provided between the substrates 111 of the two adjacent lamp boards 11, at least a portion of the adjusting member 12 is provided in the gap, and the material properties of the adjusting member 12 are basically the same as the material properties of the retaining wall structure 113 of the lamp board 11. Therefore, when the backlight module is illuminated, the backlight brightness in the area where the gap is located will be close to the backlight brightness in the area where the light board 11 is located, which is beneficial to reduce or eliminate the joint shadows and improve the display effect.

[0052] The above briefly introduces the backlight module provided by the embodiment of the present invention. The following introduces the backlight module provided by the embodiment of the present invention in detail.

[0053] The embodiment of the present invention further provides a backlight module. The backlight module, such as Figure 1-2 As shown, it includes four lamp panels 11 and an adjusting member 12.

[0054] It should be noted that, in other embodiments, the number of the light panels 11 may be 2, 3, 6, 7, 8 or other numbers. It is understandable that the sizes of the light panels 11 used for splicing may be the same or different.

[0055] In this embodiment, if Figure 1 As shown, four light boards 11 are arranged in an array along the first direction X and the second direction Y. Among them, every two light boards 11 are adjacent. For example, in the first direction X, every two light boards 11 are adjacent, and in the second direction Y, every two light boards 11 are adjacent.

[0056] In this embodiment, if Figure 2 As shown, each light board 11 includes a substrate 111 , a light emitting element 112 , a retaining wall structure 113 and a transparent protective layer 114 .

[0057] In this embodiment, if Figure 2 As shown, the light emitting element 112 and the retaining wall structure 113 are respectively located on the substrate 111 and on the same side of the substrate 111. The transparent protective layer 114 covers the light emitting element 112 to protect the light emitting element 112. The surface of the transparent protective layer 114 away from the substrate 111 is a plane.

[0058] In this embodiment, the substrate 111 may include a substrate and a driving circuit located on the substrate, and the driving circuit is used to drive the light emitting element 112 to emit light.

[0059] In this embodiment, the light emitting element 112 may be a MiniLED, but is not limited thereto. The light emitting element 112 may emit blue light, but is not limited thereto. The backlight module may further include a color conversion film for converting blue light into white light.

[0060] In this embodiment, if Figure 1 As shown, the retaining wall structure 113 may be a grid structure, and a retaining wall structure 113 may exist around each light emitting element 112. The retaining wall structure 113 is used to increase the backlight brightness. The retaining wall structure 113 includes a first shielding portion arranged along a first direction X and a second shielding portion arranged along a second direction Y, and a plurality of first shielding portions and a plurality of second shielding portions are interwoven into a grid structure.

[0061] In some embodiments, the retaining wall structure 113 can be formed by printing or coating. Figure 2 As shown, the surface of the second shielding portion arranged along the second direction Y away from the substrate 111 may be a curved surface. The cross-sectional profile of the second shielding portion perpendicular to the second direction Y is arched, for example, a part of a hyperbola, a parabola or a conic section. The cross section of the second shielding portion perpendicular to the second direction Y is located in the XZ plane, and the XZ plane is the plane where the first direction X and the third direction Z are located, and the third direction Z is perpendicular to the surface of the substrate 111 facing the retaining wall structure 113. Similarly, the surface of the first shielding portion away from the substrate 111 may be a curved surface. The cross-sectional profile of the first shielding portion perpendicular to the first direction X is arched, for example, a part of a hyperbola, a parabola or a conic section.

[0062] In this embodiment, the material properties of the retaining wall structure 113 may include reflectivity and / or color. The reflectivity of the retaining wall structure 113 may be greater than 90%, and of course, may also be equal to 90%. The color of the retaining wall structure 113 is white.

[0063] In this embodiment, the material of the retaining wall structure 113 may be white silicone adhesive, but is not limited thereto. The silicone adhesive is a silicon-based organic material.

[0064] In this embodiment, the material of the retaining wall structure 113 may include titanium dioxide. The main component of titanium dioxide is titanium dioxide (TiO2). In this embodiment, the color coordinates of the color of the retaining wall structure 113 can be adjusted by adjusting the ratio of titanium dioxide and other materials in the retaining wall structure 113. Of course, in other embodiments, the material of the retaining wall structure 113 may include zinc oxide, and the color coordinates of the color of the retaining wall structure 113 can be adjusted by adjusting the ratio of zinc oxide and other materials in the retaining wall structure 113.

[0065] In this embodiment, the height of the retaining wall structure 113 may be greater than the height of the light emitting element 112. The height of the retaining wall structure 113 is the dimension in the third direction Z. The height of the light emitting element 112 is the dimension in the third direction Z.

[0066] In this embodiment, the material of the transparent protective layer 114 can be a transparent organic material, such as a transparent optical adhesive. The surface of the transparent protective layer 114 away from the substrate 111 can be a plane, and the surface of the transparent protective layer 114 away from the substrate 111 can be parallel to the light-emitting surface of the light-emitting element 112, but is not limited thereto.

[0067] In this embodiment, if Figure 2 As shown, a gap is provided between the substrates 111 of two adjacent lamp boards 11. At least a portion of the adjusting member 12 is provided in the gap.

[0068] In this embodiment, the material properties of the adjusting member 12 are substantially the same as the material properties of the retaining wall structure 113. The material properties of the adjusting member 12 include color and reflectivity. Substantially the same means the same and similar.

[0069] In this embodiment, the color of the adjusting member 12 is white, and the color coordinates of the color of the adjusting member 12 are substantially the same as the color coordinates of the color of the retaining wall structure 113. The material of the adjusting member 12 includes titanium dioxide. In this embodiment, the color coordinates of the color of the adjusting member 12 can be adjusted by adjusting the ratio of titanium dioxide to other materials in the adjusting member 12. Of course, in other embodiments, the material of the adjusting member 12 can include zinc oxide, and the color coordinates of the color of the adjusting member 12 can be adjusted by adjusting the ratio of zinc oxide to other materials in the adjusting member 12.

[0070] In this embodiment, the reflectivity of the adjusting member 12 is greater than 90%. Of course, the reflectivity of the adjusting member 12 may also be equal to 90%.

[0071] In this embodiment, the reflectivity of the adjusting member 12 may be equal to the reflectivity of the retaining wall structure 113, and the surface of the adjusting member 12 away from the substrate 111 may be a plane, but is not limited thereto. In this way, when the reflectivity of the adjusting member 12 is equal to the reflectivity of the retaining wall structure 113, abnormal backlight brightness caused by the convex or concave surface of the surface of the adjusting member 12 away from the substrate 111 can be avoided.

[0072] Of course, in another embodiment, when the reflectivity of the adjusting member 12 is greater than the reflectivity of the retaining wall structure 113, the surface of the adjusting member 12 away from the substrate 111 may be a convex surface. Since the surface of the adjusting member 12 away from the substrate 111 is convex, it has a divergent effect on light. This can offset the defect of higher backlight brightness caused by the reflectivity of the adjusting member 12 being greater than the reflectivity of the retaining wall structure 113, and make the backlight brightness at the adjusting member 12 closer to the backlight brightness at the retaining wall structure 113.

[0073] In another embodiment, when the reflectivity of the adjusting member 12 is lower than the reflectivity of the retaining wall structure 113, the surface of the adjusting member 12 away from the substrate 111 is a concave surface. Since the surface of the adjusting member 12 away from the substrate 111 is a concave surface, it has a convergence effect on light, which can offset the defect of lower backlight brightness caused by the reflectivity of the adjusting member 12 being lower than the reflectivity of the retaining wall structure 113, so that the backlight brightness at the adjusting member 12 is closer to the backlight brightness at the retaining wall structure 113.

[0074] In this embodiment, if Figure 2 As shown, in the width direction of the gap, the width of the first end D1 of the adjusting member 12 is greater than the width of the second end D2 , wherein the first end D1 is located outside the gap between two adjacent substrates 111 , and the second end D2 is located in the gap between two adjacent substrates 111 . Figure 2 In the embodiment, the extending direction of the slit is the second direction Y, so its width direction is the first direction X. In other embodiments, the extending direction of the slit is the first direction X, and the width direction of the slit is the second direction Y. Moreover, in the width direction of the slit, the width of the first end D1 of the adjusting member 12 is greater than the width of the slit. In this way, the adjusting member 12 can block the slit between two adjacent substrates 111, which is helpful to avoid the problem of residual shadow of the joint. Moreover, it is also convenient to install the adjusting member 12 in the slit, or to adjust the position of the adjusting member 12.

[0075] In this embodiment, if Figure 2 As shown, the orthographic projection of the first end D1 of the adjusting member 12 on the substrate 111 overlaps with the orthographic projection of the retaining wall structure 113 on the substrate 111. In this way, the first end D1 of the adjusting member 12 can block the position on the substrate 111 that is not covered by the retaining wall structure 113, thereby helping to avoid the problem of residual partial seam shadows.

[0076] In this embodiment, if Figure 2 As shown, the height of the adjusting member 12 is greater than the thickness of the substrate 111. The height of the adjusting member 12 is the dimension in the third direction Z. The thickness of the substrate 111 is the dimension of the substrate 111 in the third direction Z. In this way, the light emitted by the light-emitting element 112 is more easily reflected by the adjusting member 12, which is conducive to the reflective effect of the adjusting member 12.

[0077] In this embodiment, if Figure 2As shown, the height of the adjusting member 12 may be equal to the maximum distance between the surface of the retaining wall structure 113 away from the substrate and the surface F2 of the substrate 111 away from the retaining wall structure 113. In this way, the adjusting member 12 can be prevented from contacting or pressing other components in the backlight module. Of course, the height of the adjusting member 12 may also be less than the maximum distance between the surface of the retaining wall structure 113 away from the substrate and the surface F2 of the substrate 111 away from the retaining wall structure 113.

[0078] In this embodiment, if Figure 2 As shown, retaining wall structures 113 are respectively provided on both sides of the gap, and the surface of the retaining wall structure 113 facing the adjusting member 12 is a curved surface, and the surface of the adjusting member 12 facing the retaining wall structure 113 is also a curved surface. The surface shape of the surface of the adjusting member 12 facing the retaining wall structure 113 is complementary to the surface shape of the surface of the retaining wall structure 113 facing the adjusting member 12. In this way, the distance between the adjusting member 12 and the retaining wall structure 113 can be made closer, thereby making the transition between the backlight brightness of the area where the adjusting member 12 is located and the surrounding backlight brightness smoother.

[0079] In this embodiment, if Figure 2 As shown, the surface of the adjusting member 12 facing the retaining wall structure 113 can be in contact with the surface of the retaining wall structure 113 facing the adjusting member 12. In this way, it is possible to avoid a gap between the adjusting member 12 and the retaining wall structure 113, which may cause a rough transition between the backlight brightness of the area where the adjusting member 12 is located and the surrounding backlight brightness.

[0080] In the present embodiment, the material of the adjusting member 12 is an elastic material. The material of the adjusting member 12 may be silicone rubber, but is not limited thereto. Among them, silicone rubber is a silicone organic matter. The material of the adjusting member 12 may be flexible silicone rubber. In this way, the surface of the adjusting member 12 facing the retaining wall structure 113 and the surface of the retaining wall structure 113 facing the adjusting member 12 can be more closely fitted. Moreover, since the flexible silicone rubber is easy to deform, even if the size of the part of the adjusting member 12 disposed in the gap is slightly larger than the size of the gap, it is easier to install the adjusting member 12 into the gap. In the present embodiment, the adjusting member 12 can also control the relative distance between two adjacent light panels 11. When the two adjacent light panels 11 are subjected to external force and move toward each other, the adjusting member 12 can also play a buffering role.

[0081] In this embodiment, the material of the adjusting member 12 is different from the material of the retaining wall structure 113, but the material of the adjusting member 12 and the material of the retaining wall structure 113 belong to the same type of material, both of which are silicon-based organic materials. This is conducive to making the material properties of the adjusting member 12 closer to the material properties of the retaining wall structure 113.

[0082] In this embodiment, if Figure 1 and Figure 3As shown, the adjusting member 12 may be an integrally formed structure. In this way, the adjusting member 12 can be conveniently installed in the joint gaps between the plurality of light panels 11, which is conducive to improving the installation efficiency. Of course, in other embodiments, the adjusting member 12 may also be a split structure. For example, the adjusting member 12 may include a first sub-portion and two second sub-portions, the first sub-portion is separated from the second sub-portions, and there is no fixed connection, the first sub-portion is located in the gap extending along the first direction X, and the second sub-portion is located in the gap extending along the second direction Y.

[0083] It should be noted that, when the backlight module includes two light boards 11, the shape of the adjusting member 12 can be strip-shaped; when the backlight module is composed of four light boards 11 of the same size spliced ​​in a 2*2 manner, the shape of the adjusting member 12 can be cross-shaped; when the backlight module is composed of nine light boards 11 of the same size spliced ​​in a 3*3 manner, the shape of the adjusting member 12 can be tic-tac-toe-shaped; when the backlight module includes n*m light boards 11 of the same size, the shape of the adjusting member 12 can be grid-shaped, where n and m are not less than 3.

[0084] In this embodiment, if Figure 4 As shown, before installing the adjusting member 12 in the above-mentioned gap, the four light boards 11 can be fixed with a limiting jig. For example, the jig can be a limiting block. In the process of fixing the four light boards 11, a limiting block is clamped between two adjacent light boards 11 so that the width of the gap between the substrates 111 of two adjacent light boards 11 meets the requirements. For example, the width of the gap between the substrates 111 of two adjacent light boards 11 is made substantially the same as the width of the second end D2 of the adjusting member 12, or the width of the gap between the substrates 111 of two adjacent light boards 11 is made slightly larger than the width of the second end D2 of the adjusting member 12. After the light boards 11 are fixed, the limiting block is removed from the gap. Then, the adjusting member 12 is installed in the above-mentioned gap to obtain Figure 1 The backlight module shown.

[0085] In this embodiment, the height of the light emitting element 112 is 100-150 micrometers. For example, the height of the light emitting element 112 can be 100 micrometers, 125 micrometers, or 150 micrometers, but is not limited thereto.

[0086] In this embodiment, the height of the retaining wall structure 113 is 200-300 micrometers. For example, the height of the retaining wall structure 113 can be 200 micrometers, 250 micrometers or 300 micrometers.

[0087] In this embodiment, the height of the adjusting member 12 may be 100 micrometers, 200 micrometers or 300 micrometers.

[0088] In this embodiment, since the retaining wall structures 113 are respectively arranged on both sides of the light-emitting element 112 on each lamp board 11, there is a retaining wall structure 113 at the edge of each lamp board 11. When two lamp boards 11 are adjacent to each other and a gap is arranged between the substrates 111 of the two adjacent lamp boards 11, there are retaining wall structures 113 on both sides of the gap, and at least a part of the adjusting member 12 is arranged in the gap. The material properties of the adjusting member 12 are substantially the same as the material properties of the retaining wall structures 113 of the lamp board 11. Therefore, when the backlight module provides backlight, the backlight brightness at the gap will be close to the backlight brightness at the lamp board 11, which is beneficial to reduce or eliminate the joint shadows and improve the display effect.

[0089] The embodiment of the present invention further provides a backlight module. Different from the above embodiment, in this embodiment, Figure 5 As shown, the height of the retaining wall structure 113 is less than the height of the light emitting element 112, that is, the retaining wall structure 113 can be a film layer with an opening, and the opening is used to expose the pad on the substrate 111 that is electrically connected to the light emitting component. In addition, the surface of the transparent protective layer 114 away from the substrate 111 is a curved surface to form a convex lens morphology, thereby adjusting the light type of the light emitting element 112. In this embodiment, the transparent protective layer 114 is located on the light emitting element 112 and can cover the light emitting element 112.

[0090] In this embodiment, the material of the transparent protection layer 114 may be a transparent resin, but is not limited thereto.

[0091] In this embodiment, the material of the retaining wall structure 113 may be white ink, but is not limited thereto.

[0092] In this embodiment, the material of the retaining wall structure 113 may also include a photosensitive material. In this way, before the light-emitting element 112 is electrically connected to the substrate 111, a whole layer of reflective material film can be prepared on the substrate 111, and then a hole can be prepared on the reflective material film by using a photolithography process to expose the pads on the substrate 111 that are electrically connected to the light-emitting component, thereby obtaining Figure 5 The retaining wall structure 113.

[0093] In this embodiment, if Figure 5 As shown, the height of the adjusting member 12 may be greater than the distance between the surface F3 of the retaining wall structure 113 away from the substrate 111 and the surface F2 of the substrate 111 away from the retaining wall structure 113. In this way, the light emitted by the light-emitting element 112 is more easily reflected by the adjusting member 12, which is conducive to the reflective effect of the adjusting member 12. Of course, in other embodiments, the height of the adjusting member 12 may also be equal to the distance between the surface F3 of the retaining wall structure 113 away from the substrate 111 and the surface F1 of the substrate 111 away from the retaining wall structure 113. In this way, the transition between the backlight brightness of the area where the adjusting member 12 is located and the surrounding backlight brightness can be made smoother.

[0094] In this embodiment, the height of the adjusting member 12 is less than the maximum distance between the surface of the transparent protective layer 114 away from the substrate and the surface F2 of the substrate 111 away from the transparent protective layer 114. In this way, the adjusting member 12 can be prevented from contacting or pressing other components in the backlight module. Of course, in other embodiments, the height of the adjusting member 12 can also be equal to the maximum distance between the surface of the transparent protective layer 114 away from the substrate and the surface F2 of the substrate 111 away from the transparent protective layer 114.

[0095] An embodiment of the present invention further provides a display device, comprising a display panel and a backlight module as described in any one of the above embodiments.

[0096] In this embodiment, the display panel may be a liquid crystal display panel, but is not limited thereto.

[0097] It should be noted that the display device in this embodiment can be: electronic paper, mobile phone, tablet computer, television, notebook computer, digital photo frame, navigator, or any other product or component with a display function.

[0098] The embodiment of the present invention further provides a method for preparing a backlight module, which is used to prepare the backlight module described in any of the above embodiments. Figure 6 As shown, the method for preparing the backlight module includes the following steps 601-602:

[0099] In step 601, at least two light boards 11 are arranged adjacent to each other; wherein the light board 11 includes a substrate 111, a light-emitting element 112 and a retaining wall structure 113, the light-emitting element 112 and the retaining wall structure 113 are respectively located on the substrate 111 and on the same side of the substrate 111; a gap is arranged between the substrates 111 of two adjacent light boards 11.

[0100] In this step, if Figure 4 As shown, every two light boards 11 in the four light boards 11 are arranged adjacent to each other. For example, the four light boards 11 can be fixed first using a limiting fixture. Among them, the four light boards 11 can be fixed on the back panel in the backlight module, or the four light boards 11 can be fixed on a support plate. The above-mentioned limiting fixture can be a limiting block. In the process of fixing the four light boards 11, a limiting block is clamped between two adjacent light boards 11 so that the width of the gap 41 between the substrates 111 of the two adjacent light boards 11 meets the requirements. For example, the width of the gap 41 between the substrates 111 of the two adjacent light boards 11 is made substantially the same as the width of the second end D2 of the adjusting member 12, or the width of the gap 41 between the substrates 111 of the two adjacent light boards 11 is made slightly larger than the width of the second end D2 of the adjusting member 12. After the light boards 11 are fixed, the limiting blocks are removed from the gap to complete the splicing of the light boards 11.

[0101] In step 602, at least a portion of the adjusting member is placed in the gap; wherein the material properties of the adjusting member are substantially the same as the material properties of the retaining wall structure.

[0102] In this step, the adjusting member 12 is installed in the above-mentioned gap 41 to obtain Figure 1 The backlight module shown.

[0103] It is understandable that in order to ensure that the backlight module after the plurality of light panels 11 are spliced ​​can provide uniform backlight brightness everywhere, therefore, Figure 2 or Figure 5 As shown, the spacing P1 between two adjacent light emitting elements 112 on the same light board 11 and the spacing P2 between two adjacent light emitting elements 112 on adjacent light boards 11 should be the same in theory. Furthermore, since a retaining wall structure 113 is provided between two adjacent light emitting elements 112 on each light board 11, if the design requirement of P1=P2 is to be met, for the light emitting elements 112 located in the edgemost row of the light board 11, the retaining wall structure 113' on the side close to the edge of the light board 11 needs to be larger than the retaining wall structure 113 located in other areas of the light board 11 in the splicing direction (for example, Figure 2 or Figure 5 The width in the first direction X) is smaller.

[0104] Therefore, for two adjacent light boards 11, their adjacent edge areas are provided with retaining wall structures 113', and there is a gap between the two retaining wall structures 113'. By setting at least a part of the adjusting member 12 in the gap, and the material properties of the adjusting member 12 are basically the same as the material properties of the retaining wall structure 113', when the backlight module provides backlight, the difference between the backlight brightness of the gap area between the adjacent light boards and the backlight brightness of the area where the light boards 11 are located is reduced, which is beneficial to weaken or eliminate the joint shadows and improve the display effect.

[0105] Moreover, after at least two lamp panels 11 are arranged adjacent to each other, the adjusting member is placed in the gap between the substrates 111 of the two adjacent lamp panels 11. There are no obstacles during the assembly process, no space restrictions, and no need to avoid any components. The assembly is more convenient and the assembly efficiency can be improved.

[0106] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0107] In the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0108] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the disclosure disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The description and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0109] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A backlight module, characterized in that: include: At least two adjacently arranged light panels; The light board includes a substrate, a light-emitting element and a retaining wall structure, wherein the light-emitting element and the retaining wall structure are respectively located on the substrate and on the same side of the substrate; each of the light-emitting elements is surrounded by the retaining wall structure; A gap is provided between the substrates of two adjacent light panels; an adjusting member, at least partially disposed in the gap; The material properties of the adjusting member are substantially the same as those of the retaining wall structure; when the reflectivity of the adjusting member is greater than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a convex surface; when the reflectivity of the adjusting member is equal to the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a plane; when the reflectivity of the adjusting member is less than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a concave surface.

2. The backlight module according to claim 1, characterized in that: The material properties include reflectivity; The reflectivity of the adjusting member is greater than or equal to 90%, and the reflectivity of the retaining wall structure is greater than or equal to 90%.

3. The backlight module according to claim 1, characterized in that: The material property includes color, the color of the adjusting member is white, the color of the retaining wall structure is white, The color coordinates of the color of the adjusting member are substantially the same as the color coordinates of the color of the retaining wall structure.

4. The backlight module according to claim 3, characterized in that: The material of the adjusting member includes titanium dioxide and / or zinc oxide, and the material of the retaining wall structure includes titanium dioxide and / or zinc oxide.

5. The backlight module according to claim 1, characterized in that: The height of the adjusting member is greater than the thickness of the substrate; In the width direction of the gap, the width of the first end of the adjusting member is greater than the width of the second end, wherein the first end is located outside the gap and the second end is located inside the gap; In the width direction of the gap, the width of the first end of the adjusting member is greater than the width of the gap; The orthographic projection of the first end of the adjusting member on the base plate overlaps with the orthographic projection of the retaining wall structure on the base plate.

6. The backlight module according to claim 1, characterized in that: The material of the adjusting member is elastic material.

7. The backlight module according to claim 1, characterized in that: The adjusting member is an integrally formed structure, or a split structure.

8. The backlight module according to claim 1, characterized in that: The retaining wall structure is a grid-like structure, the retaining wall structures are respectively arranged on both sides of the gap, and the shape of the surface of the adjusting member facing the retaining wall structure is complementary to the shape of the surface of the retaining wall structure facing the adjusting member; The surface of the adjusting member facing the retaining wall structure is in contact with the surface of the retaining wall structure facing the adjusting member; The surface of the retaining wall structure facing the adjusting member is a curved surface, and the surface of the adjusting member facing the retaining wall structure is a curved surface.

9. The backlight module according to claim 8, characterized in that: The height of the retaining wall structure is greater than the height of the light emitting element; The height of the adjusting member is less than or equal to the maximum distance between a surface of the retaining wall structure away from the substrate and a surface of the substrate away from the retaining wall structure.

10. The backlight module according to claim 1, characterized in that: The height of the light emitting element is 100 to 150 micrometers, the height of the retaining wall structure is 200 to 300 micrometers, and the height of the adjusting member is 100 to 300 micrometers.

11. The backlight module according to claim 1, characterized in that: The height of the retaining wall structure is less than the height of the light emitting element; The height of the adjusting member is greater than or equal to the maximum distance between a surface of the retaining wall structure away from the substrate and a surface of the substrate away from the retaining wall structure.

12. The backlight module according to claim 11, characterized in that: The light board further comprises a transparent protective layer, and the transparent protective layer is located on the light emitting element; The height of the adjusting member is less than or equal to the maximum distance between a surface of the transparent protective layer away from the substrate and a surface of the substrate away from the transparent protective layer.

13. A display device, characterized in that: It comprises a display panel and the backlight module according to any one of claims 1 to 12.

14. A method for preparing a backlight module, characterized in that: The backlight module includes: at least two light panels and an adjustment member; the method includes: At least two of the light boards are arranged adjacent to each other; wherein the light board comprises a substrate, a light-emitting element and a retaining wall structure, the light-emitting element and the retaining wall structure are respectively located on the substrate and on the same side of the substrate; each of the light-emitting elements is surrounded by the retaining wall structure; a gap is arranged between the substrates of two adjacent light boards; At least a portion of the adjusting member is placed in the gap; wherein the material properties of the adjusting member are substantially the same as those of the retaining wall structure; when the reflectivity of the adjusting member is greater than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a convex surface; when the reflectivity of the adjusting member is equal to the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a plane; when the reflectivity of the adjusting member is less than the reflectivity of the retaining wall structure, the surface of the adjusting member away from the substrate is a concave surface.

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