Backlight module and display device

1. A backlight module comprising a backplane and a plurality of backlight parts provided on the backplane, in which a seam is provided between the two adjacent backlight parts, wherein

an adjustment part is installed at the seam, the adjustment part comprising:

a connecting portion, an end of which is installed on the backplane through the seam; and

an adjustment portion provided at an end of the connecting portion away from the backplane, in which an outer diameter of the adjustment portion tapers along a direction toward the backplane, an end of the adjustment portion enters the seam, a degree to which the adjustment portion enters the seam is adjusted by adjusting a depth at which the connecting portion is installed in the backplane, and a width of the seam is adjusted by adjusting the degree to which the adjustment portion enters the seam.

2. The backlight module according to claim 1 , wherein a first surface of the backplane is provided with an assembly hole corresponding to the connecting portion, the assembly hole is provided with an inner thread, the connecting portion is provided with an outer thread corresponding to the inner thread, and a width of the assembly hole is smaller than the width of the seam.

3. The backlight module according to claim 2 , wherein the backlight part comprises a base plate and a plurality of light-emitting units, a surface of the base plate is installed on the first surface of the backplane, and a plurality of the light-emitting units are installed in an array on a surface of the base plate facing away from the backplane.

4. The backlight module according to claim 3 , wherein a length of the adjustment portion along an axial direction of the assembly hole is h2, a thickness of the base plate is h4, and h2 and h4 satisfy the following relationship: h2>h4.

5. The backlight module according to claim 3 , wherein an edge of the base plate is provided with an avoidance groove corresponding to the adjustment portion of the adjustment part.

6. The backlight module according to claim 5 , wherein the adjustment part further comprises a kit made of an elastic insulating material and provided in the seam; and

the adjustment part is installed on the backplane through the kit.

7. The backlight module according to claim 6 , wherein the kit comprises: a first portion provided in the seam; and a second portion comprising a first end facing the backplane and a second end facing away from the backplane, in which the first end is connected to the first portion, and an outer diameter of the second portion tapers along a direction toward the backplane; the second end is provided with an accommodating groove corresponding to the adjustment portion, and an inner diameter of the accommodating groove tapers along a direction toward the backplane; a bottom of the accommodating groove is provided with a through hole, the connecting portion passes through the through hole, and an inner surface of the through hole is provided with an inner thread corresponding to the connecting portion.

8. The backlight module according to claim 7 , wherein a side of the base plate is coated with an insulating buffer layer.

9. The backlight module according to claim 1 , wherein the adjustment portion has an inverted cone structure, and an upper end face of the adjustment portion is coated with a reflective material.

10. The backlight module according to claim 3 , wherein an edge of the base plate is coated with a reflective material.

11. The backlight module according to claim 8 , wherein a side of the insulating buffer layer facing away from the backplane is coated with a reflective material.

12. The backlight module according to claim 1 , wherein an upper end face of the adjustment portion is connected to a reflecting portion comprising a plurality of reflecting surfaces.

13. The backlight module according to claim 1 , wherein an upper end face of the adjustment portion is provided with a slotted pattern or a cross pattern.

14. The backlight module according to claim 5 , wherein the avoidance groove is a semi-circular groove, an inner diameter of a hole formed by the two opposite avoidance grooves of the two adjacent base plates is smaller than a diameter of an upper end face of the adjustment portion and larger than a diameter of a bottom end face of the adjustment portion.

15. The backlight module according to claim 5 , wherein avoidance groove is a semi-conical groove, and an inner diameter of the avoidance groove tapers along a direction toward the backplane; a maximum inner diameter of a hole formed by the two opposite avoidance grooves of the two adjacent base plates is smaller than a diameter of an upper end face of the adjustment portion and larger than a diameter of a bottom end face of the adjustment portion.

16. The backlight module according to claim 2 , wherein a length of a thread section of the connecting portion is h1, a depth of the assembly hole is h3, and h1 and h3 satisfy the following relationship: h3≥h1.

17. The backlight module according to claim 1 , wherein the connecting portion and the adjustment portion are formed integrally.

18. The backlight module according to claim 3 , wherein the base plate is a glass base plate or a PCB base plate.

19. The backlight module according to claim 3 , wherein the light-emitting unit is a Mini LED.

20. A display device comprising:

a housing;

a backlight module which is the backlight module according to claim 1 and installed in the housing; and

a display panel installed on the housing and located on a light-emitting side of the backlight module.