Tiled display system and tiled display device

1. A tiled display system, comprising:

a plurality of circuit boards;

a plurality of display devices electrically connected to each other via the plurality of circuit boards; and

a controller driving the plurality of display devices to enable each display device to display a sub-frame, all sub-frames being tiled as one frame,

wherein the display devices comprise: a first display device that starts displaying first, a second display device that is disposed adjacent to the first display device and a last display device that starts displaying last, the first display device displays the sub-frame at a first time point, the last display device displays the sub-frame at a last time point, and the first time point and the last time point satisfy an equation:

0<( Tn−T 1)≤(1/ H 1)×[( N− 1)/ N ],

where T1 is the first time point, Tn is the last time point, H1 is a refresh rate of each of the display devices, and N is a number of the display devices,

wherein the first display device comprises a first driving substrate and a first display panel disposed on the first driving substrate, the second display device comprises a second driving substrate and a second display panel disposed on the second driving substrate, one of the plurality of circuit boards is disposed under the first display device and the second display device, the one of the plurality of circuit boards is at least partially overlapped with the first display device and the second display device in a normal direction of the first driving substrate, and the one of the plurality of circuit boards is electrically connected with the first display device and the second display device,

wherein the one of the plurality of circuit boards crosses a boundary between the first driving substrate and the second driving substrate.

2. The tiled display system of claim 1 , wherein the controller outputs frame data of the frame to the plurality of display devices.

3. The tiled display system of claim 2 , wherein the plurality of display devices are electrically connected to each other in a cascading manner and the frame data is transmitted to the plurality of display devices in a sequence of cascading.

4. The tiled display system of claim 2 , wherein the frame data is directly transmitted to the plurality of display devices.

5. The tiled display system of claim 2 , wherein the frame data is transmitted to the plurality of display devices in a wired or wireless manner.

6. The tiled display system of claim 1 , wherein the controller outputs a plurality of triggering signals, each driving one of the plurality of display devices.

7. The tiled display system of claim 6 , wherein the plurality of display devices are electrically connected to each other in a cascading manner, and the plurality of triggering signals are respectively transmitted to the plurality of display devices in a sequence of cascading.

8. The tiled display system of claim 6 , wherein each of the plurality of triggering signals is directly transmitted to one of the plurality of display devices.

9. The tiled display system of claim 6 , wherein the plurality of triggering signals are transmitted to the plurality of display devices in a wired or wireless manner.

10. The tiled display system of claim 1 , wherein the refresh rate is in a range from 60 Hz to 3840 Hz.

11. The tiled display system of claim 1 , wherein the controller outputs frame data of the frame to the plurality of display devices first and then outputs a plurality of triggering signals, and each of the plurality of triggering signals drives one of the plurality of display devices.

12. The tiled display system of claim 1 , wherein the plurality of display devices are arranged in juxtaposition.

13. A tiled display device, comprising:

a driving substrate;

a plurality of display panels disposed on the driving substrate; and

a controller electrically connected to the driving substrate via a circuit board, and the controller driving the plurality of display panels via the driving substrate to enable each display panel to display a sub-frame, all sub-frames being tiled as one frame,

wherein the display panels comprise: a first display panel that starts displaying first and a last display panel that starts displaying last, the first display panel displays the sub-frame at a first time point, the last display panel displays the sub-frame at a last time point, and the first time point and the last time point satisfy an equation:

0<( Tm−T 1)(1/ H 2)×[( M− 1)/ M ],

where T1 is the first time point, Tm is the last time point, H2 is a refresh rate of each of the display panels, and M is a number of the display panels,

wherein the circuit board is electrically connected to the driving substrate and;

wherein, in a normal direction of the driving substrate, a part of the circuit board is overlapped with the driving substrate and another part of the circuit board is not overlapped with the driving substrate.

14. The tiled display device of claim 13 , wherein the controller outputs frame data of the frame to the plurality of display panels.

15. The tiled display device of claim 14 , wherein the frame data is directly transmitted to the plurality of display panels.

16. The tiled display device of claim 13 , wherein the controller outputs a plurality of triggering signals, each driving one of the plurality of display panels.

17. The tiled display device of claim 16 , wherein each of the plurality of triggering signals is directly transmitted to one of the plurality of display panels.

18. The tiled display device of claim 13 , wherein the refresh rate is in a range from 60 Hz to 3840 Hz.

19. The tiled display device of claim 13 , wherein the controller outputs frame data of the frame to the plurality of display panels first and then outputs a plurality of triggering signals, and each of the plurality of triggering signals drives one of the plurality of display panels.

20. The tiled display device of claim 13 , wherein the plurality of display panels are arranged in juxtaposition.