Display panel and display screen

1. A display panel, comprising:

a plurality of display modules; and

a cabinet;

wherein the plurality of display modules are distributed in a matrix, and are fixed in front of the cabinet;

the cabinet is provided with two display module openings and a power supply assembly opening, and the two display module openings are provided at two sides of the power supply assembly opening;

a protective cover plate is installed in front of the cabinet to cover the power supply assembly opening and form a power supply assembly cavity behind the cabinet, which is configured to install a power supply assembly;

two module opening cover plates are installed behind the cabinet to cover the two display module openings in a one-to-one correspondence, and

wherein the display module comprises a bottom shell and at least one printed circuit board (PCB) module with light-emitting diodes (LEDs), and the at least one PCB module with LEDs is fixed in front of the bottom shell.

2. The display panel of claim 1 , further comprising:

a HUB control board,

wherein the HUB control board is installed in front of the cabinet, and the HUB control board is adjacent to the two display module openings.

3. The display panel of claim 1 , wherein the power supply assembly comprises a power supply box and a power supply module, the power supply module is fixed on a side surface of the power supply box facing the protective cover plate, and an edge of the power supply box is fastened with a rear side of the cabinet through a plurality of first screws.

4. The display panel of claim 3 , wherein the plurality of first screws are screws tightened from the rear side of the cabinet.

5. The display panel of claim 3 , wherein a plurality of reinforcing ribs are provided on the side surface of the power supply box away from the protective cover plate.

6. The display panel of claim 3 , wherein edges of the two module opening cover plates are fastened to the rear side of the cabinet through the plurality of first screws.

7. The display panel of claim 1 , wherein the display module further comprises a HUB, and an edge of the HUB is fixed in front of the bottom shell through a plurality of second screws.

8. The display panel of claim 7 , wherein the plurality of second screws are screws tightened from a front side of the bottom shell.

9. The display panel of claim 1 , wherein at least one worm gear lock is provided on a side of a first cabinet, and a lock hole corresponding to the at least one worm gear lock is provided on a side of a second cabinet adjacent to the side of the first cabinet.

10. The display panel of claim 9 , wherein the cabinet have four sides, two adjacent sides of the cabinet are provided with a plurality of worm gear locks, the other two adjacent sides of the cabinet are provided with lock holes corresponding to the plurality of worm gear locks one-to-one.

11. The display panel of claim 10 , wherein each worm gear lock comprises a worm and a helical gear meshed with the worm, and when the worm is driven by the helical gear, the worm extends vertically from or retracts from a respective side.

12. The display panel of claim 11 , wherein the helical gear is provided with an inner hexagonal through hole.

13. The display panel of claim 12 , wherein both a front side of the cabinet and a rear side of the cabinet are provided with openings communicating with the inner hexagonal through hole.

14. A display screen, comprising:

a plurality of the display panels of claim 1 ;

wherein two adjacent display panels are connected through a locking cooperation between the worm gear lock and the lock hole.