Backlight module and display device

1. A backlight module, comprising:

a backplate comprising a bottom plate and at least one side plate disposed on the bottom plate;

a light board comprising at least one light-emitting diode, wherein the light board is fixed onto one of the at least one side plate and disposed on one side of the bottom plate; and

a reflective sheet disposed on the bottom plate and extending between the at least one light-emitting diode and the bottom plate;

wherein the bottom plate is provided with a concave part formed adjacent to one of the at least one side plate and corresponding to the at least one light-emitting diode;

wherein the side of the bottom plate adjacent to the light board is provided with marking lines, the marking lines are formed on a surface of the concave part and comprise a first marking line and a second marking line in parallel to each other at an interval in a direction from the one of the at least one side plate to the reflective sheet, the first marking line is adjacent to the one of the at least one side plate fixed with the light board, and one end of the reflective sheet adjacent to the light board is disposed corresponding to the first marking line, the second marking line, or between the first marking line and the second marking line.

2. The backlight module according to claim 1 , wherein a spacing between one end of the reflective sheet adjacent to the light board and the one of the at least one side plate fixed with the light board is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

3. The backlight module according to claim 1 , wherein a width of the concave part is greater than or equal to 0.5 mm and less than or equal to 2 mm, and a dented depth of the concave part is greater than or equal to 0.3 mm and less than or equal to 1 mm.

4. The backlight module according to claim 1 , further comprising an insulating layer disposed on the bottom plate and corresponding to the at least one light-emitting diode.

5. The backlight module according to claim 4 , wherein the insulating layer is one selected from an insulating glue layer or an ink layer.

6. The backlight module according to claim 1 , wherein a spacing between one side of the at least one light-emitting diode adjacent to the reflective sheet and the reflective sheet is greater than 0 mm and less than or equal to 0.1 mm.

7. The backlight module according to claim 1 , further comprising a light guide plate disposed on the reflective sheet, wherein the at least one light-emitting diode is disposed on one side surface of the light guide plate.

8. The backlight module according to claim 1 , further comprising a thermal conductive glue, wherein the light board is fixed onto the one of the at least one side plate by the thermal conductive glue.

9. A display device, comprising a backlight module and a liquid crystal display panel, wherein the liquid crystal display panel is disposed on a light-emitting side of the backlight module, and the backlight module comprises:

a backplate comprising a bottom plate and at least one side plate disposed on the bottom plate;

a light board comprising at least one light-emitting diode, wherein the light board is fixed onto one of the at least one side plate and disposed on one side of the bottom plate; and

a reflective sheet disposed on the bottom plate and extending between the at least one light-emitting diode and the bottom plate;

wherein the bottom plate is provided with a concave part formed adjacent to one of the at least one side plate and corresponding to the at least one light-emitting diode;

wherein the side of the bottom plate adjacent to the light board is provided with marking lines, the marking lines are formed on a surface of the concave part and comprise a first marking line and a second marking line in parallel to each other at an interval in a direction from the one of the at least one side plate to the reflective sheet, the first marking line is adjacent to the one of the at least one side plate fixed with the light board, and one end of the reflective sheet adjacent to the light board is disposed corresponding to the first marking line, the second marking line, or between the first marking line and the second marking line.

10. The display device according to claim 9 , wherein a spacing between one end of the reflective sheet adjacent to the light board and the one of the at least one side plate fixed with the light board is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

11. The display device according to claim 9 , wherein a width of the concave part is greater than or equal to 0.5 mm and less than or equal to 2 mm, and a dented depth of the concave part is greater than or equal to 0.3 mm and less than or equal to 1 mm.

12. The display device according to claim 9 , wherein the backlight module further comprises an insulating layer disposed on the bottom plate and corresponding to the at least one light-emitting diode.

13. The display device according to claim 12 , wherein the insulating layer is one selected from an insulating glue layer or an ink layer.

14. The display device according to claim 9 , wherein a spacing between one side of the at least one light-emitting diode adjacent to the reflective sheet and the reflective sheet is greater than 0 mm and less than or equal to 0.1 mm.

15. The display device according to claim 9 , wherein the backlight module further comprises a light guide plate disposed on the reflective sheet, and the at least one light-emitting diode is disposed on one side surface of the light guide plate.

16. The display device according to claim 9 , wherein the backlight module further comprises a thermal conductive glue, and the light board is fixed onto the one of the at least one side plate by the thermal conductive glue.