Backlight module and display device

Abstract

The utility model provides a backlight module and a display device. The backlight module comprises a circuit board, a first reflecting layer and a second reflecting layer which are sequentially stacked from bottom to top and further comprises a plurality of light-emitting units, each light-emitting unit comprises a lens and at least one light-emitting part, the light-emitting parts are fixed to the circuit board, and the lenses cover the light-emitting parts; the first reflecting layer is provided with a plurality of first through holes, and the light-emitting pieces penetrate through the first through holes in a one-to-one correspondence mode. The second reflecting layer is provided with a plurality of second through holes, and the lenses cover the first reflecting layer and penetrate through the second through holes in a one-to-one correspondence mode. The reflectivity of the area below the lens can be improved, so that the backlight effect of the backlight module is improved, and the display effect of the display device is improved.

Description

Technical Field

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

[0002] In order to improve the reflectivity of the backlight board, a layer of reflective paper is usually attached to the surface of the board after the lens is made. The reflective paper is pre-punched to avoid the lens on the board. However, this solution has the following problems: the area under the lens cannot be covered by the reflective paper, resulting in the inability to improve the reflectivity of the area under the lens. Utility Model Content

[0003] The embodiments of the present application provide a backlight module and a display device to solve the problem that the existing backlight panel method cannot improve the reflectivity of the area below the lens.

[0004] In a first aspect, an embodiment of the present application provides a backlight module, which includes a circuit board, a first reflective layer, and a second reflective layer stacked in sequence from bottom to top, and also includes a plurality of light-emitting units, wherein the light-emitting unit includes a lens and at least one light-emitting component, the light-emitting component is fixed on the circuit board, and the lens cover is arranged on the light-emitting component; the first reflective layer is provided with a plurality of first through holes, and the light-emitting components are respectively passed through the first through holes; the second reflective layer is provided with a plurality of second through holes, and the lens covers the first reflective layer and is respectively passed through the second through holes.

[0005] Optionally, the aperture of the first through hole is smaller than the outer diameter of the lens, and the difference between the outer diameter of the lens and the aperture of the first through hole is A, 0mm<A≤5mm.

[0006] Optionally, a diameter of the second through hole is larger than an outer diameter of the lens.

[0007] Optionally, a difference between the aperture of the second through hole and the outer diameter of the lens is B, 0mm<B≤1mm.

[0008] Optionally, the first reflective layer is reflective paper.

[0009] Optionally, the first reflective layer includes a plurality of annular reflective papers, the through holes of the annular reflective papers form the first through holes, the light-emitting parts are respectively passed through the through holes of the annular reflective papers, the lenses are respectively covered on top of the annular reflective papers, and the outer diameter of the annular reflective papers is larger than the outer diameter of the lenses.

[0010] Optionally, the second reflective layer is reflective paper.

[0011] Optionally, a center line of the first through hole and a center line of the corresponding second through hole both coincide with a center line of the corresponding lens.

[0012] Optionally, the first through hole is a circular hole or a rectangular hole.

[0013] Optionally, the second through hole is a circular hole or a rectangular hole.

[0014] Optionally, the first reflective layer is bonded to the circuit board.

[0015] Optionally, the lens is bonded to the first reflective layer.

[0016] Optionally, the second reflective layer is bonded to the first reflective layer.

[0017] Optionally, there are multiple light-emitting components, and the multiple light-emitting components are arranged in a rectangular array on the circuit board.

[0018] In a second aspect, an embodiment of the present application further provides a display device, which includes the above-mentioned backlight module.

[0019] The backlight module and the display device provided in the embodiments of the present application are stacked in sequence from bottom to top by a circuit board, a first reflective layer and a second reflective layer. The light-emitting element of the light-emitting unit is fixed on the circuit board and penetrated through the first through hole of the first reflective layer. The lens cover is arranged on the light-emitting element. Meanwhile, the lens also covers the first reflective layer and penetrates through the second through hole of the second reflective layer, so that the first reflective layer can cover the area below the lens, thereby improving the reflectivity of the area below the lens, thereby improving the backlight effect of the backlight module and the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative work. In the following description, the same figure numbers represent the same parts.

[0021] Figure 1 A schematic diagram of the structure of the backlight module provided in an embodiment of the present application.

[0022] Figure 2 for Figure 1 The schematic diagram of a partial cross section of the backlight module along the horizontal direction is shown.

[0023] Figure 3 for Figure 1 The structure diagram of the backlight module shown is a schematic diagram of the structure of which the second reflective layer is omitted.

[0024] Figure 4 for Figure 3 The structure diagram of the backlight module shown is a schematic diagram of the structure after the lens is omitted.

[0025] Figure 5 A schematic diagram of the structure of the second reflective layer provided in an embodiment of the present application.

[0026] Description of Figure Numbers:

[0027] 100, circuit board; 200, light-emitting element; 300, first reflective layer; 301, first through hole; 302, annular reflective paper; 400, lens; 500, second reflective layer; 501, second through hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] The present application embodiment provides a backlight module, such as Figure 1 to Figure 5As shown, the backlight module includes a circuit board 100, a first reflective layer 300, and a second reflective layer 500 stacked in sequence from bottom to top, and also includes a plurality of light-emitting units, the light-emitting units include a lens 400 and at least one light-emitting member 200, the light-emitting members 200 are all arranged on the circuit board 100, and the lens 400 is covered on the light-emitting member 200; the first reflective layer 300 is provided with a plurality of first through holes 301, and the light-emitting members 200 are correspondingly penetrated in the first through holes 301; the second reflective layer 500 is provided with a plurality of second through holes 501, and the lenses 400 cover the first reflective layer 300 and are correspondingly penetrated in the second through holes 501. Among them, "several" means one or more.

[0032] The backlight module and the display device provided in the embodiment of the present application are stacked in sequence from bottom to top by a circuit board 100, a first reflective layer 300, and a second reflective layer 500. The light-emitting element 200 of the light-emitting unit is fixed on the circuit board 100 and penetrates the first through hole 301 of the first reflective layer 300. The lens 400 is covered on the light-emitting element 200. Meanwhile, the lens 400 also covers the first reflective layer 300 and penetrates the second through hole 501 of the second reflective layer 500, so that the first reflective layer 300 can cover the area below the lens 400, thereby improving the reflectivity of the area below the lens 400, thereby improving the backlight effect of the backlight module and the display effect of the display device including the backlight module.

[0033] Optionally, the circuit board 100 is a PCB board (ie, printed circuit board), thereby reducing production costs.

[0034] In some embodiments of the present application, the aperture of the first through hole 301 is smaller than the outer diameter of the lens 400, and the difference between the outer diameter of the lens 400 and the aperture of the first through hole 301 is A, 0mm<A≤5mm. By setting the difference between the outer diameter of the lens 400 and the aperture of the first through hole 301 within the above range, the first reflective layer 300 can effectively cover the area below the lens 400 to improve the reflectivity of the area below the lens 400, while reducing the production cost.

[0035] Exemplarily, the difference A between the outer diameter of the lens 400 and the aperture of the first through hole 301 can be 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm or 5mm, etc., and can be set according to actual needs.

[0036] In some embodiments of the present application, the aperture of the second through hole 501 is larger than the outer diameter of the lens 400 , thereby preventing the edge of the second through hole 501 from hitting the lens 400 , making it easier to operate when setting the second reflective layer 500 on the first reflective layer 300 .

[0037] Optionally, the difference between the aperture of the second through hole 501 and the outer diameter of the lens 400 is B, 0mm<B≤1mm. By setting the difference between the aperture of the second through hole 501 and the outer diameter of the lens 400 within the above range, it is possible to prevent the edge of the second through hole 501 from hitting the lens 400, and at the same time, the second reflective layer 500 can cover more of the area around the lens 400, thereby improving the reflectivity of the second reflective layer 500, thereby improving the backlight effect of the backlight module.

[0038] Exemplarily, the difference B between the aperture of the second through hole 501 and the outer diameter of the lens 400 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm, etc., and can be set according to actual needs.

[0039] In some embodiments of the present application, the first reflective layer 300 includes a plurality of annular reflective papers 302, the through holes of the annular reflective papers 302 form first through holes 301, the light-emitting elements 200 are respectively inserted into the through holes of the annular reflective papers 302, the lenses 400 are respectively covered on top of the annular reflective papers 302, and the outer diameter of the annular reflective papers 302 is greater than the outer diameter of the lenses 400.

[0040] In other embodiments, the first reflective layer 300 may also be reflective paper, that is, a plurality of first through holes 301 are opened on a piece of reflective paper to serve as the first reflective layer 300 .

[0041] In some embodiments of the present application, the second reflective layer 500 is reflective paper, that is, a plurality of first through holes 301 are opened on a piece of reflective paper to serve as the second reflective layer 500 .

[0042] In other embodiments, when there are multiple light-emitting elements 200 and lenses 400 , the second reflective layer 500 may also include multiple reflective papers, each of which is provided with a second through hole 501 , and multiple reflective papers are spliced ​​together to form the second reflective layer 500 .

[0043] In some embodiments of the present application, the center line of the first through hole 301 and the center line of the corresponding second through hole 501 coincide with the center line of the corresponding lens 400, thereby ensuring that the first reflective layer 300 and the second reflective layer 500 have the same blocking area for light emitted in all directions by the light-emitting element 200, so that the brightness of the backlight module is uniform, avoiding the problem of one side being bright and the other side being dim due to an eccentric setting.

[0044] Optionally, the first through hole 301 is a circular hole or a rectangular hole (eg, a square hole or a rectangular hole). Optionally, the second through hole 501 is a circular hole or a rectangular hole (eg, a square hole or a rectangular hole).

[0045] In some embodiments of the present application, the first through hole 301 and the second through hole 501 have the same shape, for example, the first through hole 301 and the second through hole 501 are both circular holes, or the first through hole 301 and the second through hole 501 are both square holes.

[0046] In other embodiments, the shapes of the first through hole 301 and the second through hole 501 may be different, for example, the first through hole 301 is a square hole and the second through hole 501 is a circular hole; or, the first through hole 301 is a circular hole and the second through hole 501 is a square hole.

[0047] Optionally, the first reflective layer 300 is bonded to the circuit board 100, that is, the first reflective layer 300 is fixed to the circuit board 100 by adhesive. Optionally, the lens 400 is bonded to the first reflective layer 300, that is, the lens 400 is fixed to the first reflective layer 300 by adhesive (such as thermosetting adhesive 700). Optionally, the second reflective layer 500 is bonded to the first reflective layer 300, that is, the second reflective layer 500 is fixed to the first reflective layer 300 by adhesive.

[0048] In some embodiments of the present application, there are multiple light-emitting elements 200, and the multiple light-emitting elements 200 are arranged in a rectangular array on the circuit board 100, so that the brightness of the backlight module can be uniform, local color difference can be improved, and the backlight effect of the backlight module can be improved. Preferably, the multiple light-emitting elements 200 are in a rectangular array and are evenly arranged on the circuit board 100. Optionally, the light-emitting element 200 is an LED.

[0049] The embodiment of the present application also provides a display device, which includes a backlight module. The specific structure of the backlight module refers to the above embodiment. Since the display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0050] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0051] The backlight module and display device provided in the embodiments of the present application are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A backlight module, characterized in that: The invention comprises a circuit board (100), a first reflection layer (300) and a second reflection layer (500) which are stacked in sequence from bottom to top, and also comprises a plurality of light-emitting units, wherein the light-emitting units comprise a lens (400) and at least one light-emitting element (200), wherein the light-emitting element (200) is fixed on the circuit board (100), and the lens (400) is covered on the light-emitting element (200); The first reflective layer (300) is provided with a plurality of first through holes (301), and the light-emitting elements (200) are passed through the first through holes (301) in a one-to-one correspondence; The second reflective layer (500) is provided with a plurality of second through holes (501), and the lenses (400) cover the first reflective layer (300) and are penetrated in the second through holes (501) in a one-to-one correspondence.

2. The backlight module according to claim 1, characterized in that: The aperture of the first through hole (301) is smaller than the outer diameter of the lens (400), and the difference between the outer diameter of the lens (400) and the aperture of the first through hole (301) is A, 0mm<A≤5mm.

3. The backlight module according to claim 1, characterized in that: The aperture of the second through hole (501) is larger than the outer diameter of the lens (400).

4. The backlight module according to claim 3, characterized in that: The difference between the aperture of the second through hole (501) and the outer diameter of the lens (400) is B, and 0mm<B≤1mm.

5. The backlight module according to claim 1, characterized in that: The first reflective layer (300) is reflective paper.

6. The backlight module according to claim 1, characterized in that: The first reflective layer (300) comprises a plurality of annular reflective papers (302), the through holes of the annular reflective papers (302) forming the first through holes (301), the light-emitting elements (200) being arranged in the through holes of the annular reflective papers (302) in a one-to-one correspondence, the lenses (400) being covered in a one-to-one correspondence above the annular reflective papers (302), and the outer diameter of the annular reflective papers (302) being greater than the outer diameter of the lenses (400).

7. The backlight module according to any one of claims 1 to 6, characterized in that: The second reflective layer (500) is reflective paper.

8. The backlight module according to claim 1, characterized in that: The center line of the first through hole (301) and the center line of the corresponding second through hole (501) both coincide with the center line of the corresponding lens (400).

9. The backlight module according to claim 1, characterized in that: The first through hole (301) is a circular hole or a rectangular hole.

10. The backlight module according to claim 1, characterized in that: The second through hole (501) is a circular hole or a rectangular hole.

11. The backlight module according to claim 1, characterized in that: The first reflective layer (300) is bonded to the circuit board (100).

12. The backlight module according to claim 1, characterized in that: The lens (400) is bonded to the first reflective layer (300).

13. The backlight module according to claim 1, characterized in that: The second reflective layer (500) is bonded to the first reflective layer (300).

14. The backlight module according to claim 1, characterized in that: There are a plurality of light-emitting components (200), and the plurality of light-emitting components (200) are arranged on the circuit board (100) in a rectangular array.

15. A display device, characterized in that: The display device comprises the backlight module according to any one of claims 1 to 14.

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