Display control system, display apparatus and control method

1. A display control system, comprising:

a display, a display controller driving the display, and a bridge circuit connecting the display and the display controller, wherein

the display controller is configured to output a first video signal according to an external video source; and

the bridge circuit is configured to determine whether the display controller is in normal operation state according to the first video signal received, output the first video signal to the display to play the first video signal when the display controller is in normal operation state, and output a second video signal pre-stored to the display to play the second video signal when the display controller is not in normal operation state,

wherein the bridge circuit comprises a video receiver, a timing detector and a selector, wherein the video receiver is connected with the display controller, the timing detector is connected with the video receiver and the selector,

the video receiver is configured to receive the first video signal output by the display controller, transmit the first video signal to the selector, and transmit a timing signal of the first video signal and a frame data of the first video signal to the timing detector;

the timing detector is configured to detect whether the timing signal of the first video signal and the frame data of the first video signal are normal or not and transmit a detection result to the selector,

wherein the timing detector is further configured to

pre-store a field synchronization signal threshold, a row synchronization signal threshold and a data enable signal threshold of the first video signal output by the display controller under normal operation state,

pre-store a preset pixel row data threshold and a preset pixel column data threshold,

detect the timing signal of the first video signal and the frame data of the first video signal transmitted by the video receiver based on the pre-stored signal thresholds, wherein the timing signal comprises a field synchronization signal of the first video signal, a row synchronization signal of the first video signal and a data enable signal of the first video signal, and the frame data comprises pixel row data and pixel column data,

when the field synchronization signal, the row synchronization signal and the data enable signal, the pixel row data and the pixel column data all meet corresponding signal threshold, determine an initialization of the display controller being completed and the display controller entering a normal operation state, and

output a first detection result to the selector.

2. The display control system according to claim 1 , wherein the bridge circuit further comprises a memory and a transmitter, wherein the selector is connected with the memory and the transmitter;

the memory is configured to store a second video signal and transmit the second video signal to the selector;

the selector is configured to selectively output the first video signal or the second video signal to the transmitter according to the detection result; and

the transmitter is connected with the display and configured to transmit the first video signal or the second video signal received to the display.

3. The display control system according to claim 2 , wherein

the timing detector is further configured to output a second detection result when any one of the timing signal of the first video signal and the frame data of the first video signal does not meet the corresponding preset thresholds; and

the selector is configured to selectively output the first video signal to the transmitter according to the first detection result and selectively output the second video signal to the transmitter according to the second detection result.

4. The display control system according to claim 1 , wherein

the second video signal is a boot screen.

5. The display control system according to claim 1 , wherein

the bridge circuit is a field programmable gate array (FPGA).

6. The display control system according to claim 2 , wherein

the video receiver comprises a first communication interface configured to establish a communication connection with the display controller; and

the transmitter comprises a second communication interface configured to establish a communication connection with the display.

7. The display control system according to claim 6 , wherein

the first communication interface is further configured to receive a first video signal output by the display controller; and

the second communication interface is further configured to transmit the first video signal or the second video signal received to the display.

8. The display control system according to claim 6 , wherein

the first communication interface and the second communication interface are both Video-By-One (VBO) interfaces.

9. A display apparatus, comprising the display control system according to claim 1 .

10. A controlling method, applied to the display control system according to claim 1 , comprising:

determining, by the bridge circuit of the display control system, whether the display controller is in normal operation state according to the first video signal received, wherein the first video signal is output by the display controller according to the external video source; and

outputting the first video signal to the display to play the first video signal when the display controller is in normal operation state, and outputting the second video signal pre-stored to the display to play the second video signal when the display controller is not in normal operation state,

wherein the bridge circuit comprises a video receiver, a timing detector and a selector,

determining whether the display controller is in normal operation state according to the first video signal received comprises:

receiving, by the video receiver, the first video signal output by the display controller, transmitting the first video signal to the selector, and transmitting a timing signal of the first video signal and a frame data of the first video signal to the timing detector; and

detecting, by the timing detector, whether the timing signal of the first video signal and the frame data of the first video signal are normal or not and transmitting a detection result to the selector,

wherein detecting, by the timing detector, whether the timing signal of the first video signal and the frame data of the first video signal are normal or not and transmitting a detection result to the selector comprises:

pre-storing, by the timing detector, a field synchronization signal threshold, a row synchronization signal threshold and a data enable signal threshold of the first video signal output by the display controller under normal operation state,

pre-storing, by the timing detector, a preset pixel row data threshold and a preset pixel column data threshold,

detecting, by the timing detector, the timing signal of the first video signal and the frame data of the first video signal transmitted by the video receiver based on the pre-stored signal thresholds, wherein the timing signal comprises a field synchronization signal of the first video signal, a row synchronization signal of the first video signal and a data enable signal of the first video signal, and the frame data comprises pixel row data and pixel column data,

when the field synchronization signal, the row synchronization signal and the data enable signal, the pixel row data and the pixel column data all meet corresponding signal threshold, determining, by the timing detector, an initialization of the display controller being completed and the display controller entering a normal operation state, and

outputting, by the timing detector, a first detection result to the selector.

11. The control method according to claim 10 , wherein the bridge circuit further comprises a memory and a transmitter, wherein

outputting the first video signal to the display to play the first video signal when the display controller is in normal operation state and outputting the second video signal pre-stored to the display to play the second video signal when the display controller is not in normal operation state comprises:

transmitting, by the memory, the second video signal pre-stored to the selector;

selectively outputting, by the selector, the first video signal or the second video signal to the transmitter according to the detection result; and

transmitting, by the transmitter, the first video signal or the second video signal received to the display to play the video signal received.

12. The control method according to claim 11 , wherein

detecting, by the timing detector, whether the timing signal of the first video signal and the frame data of the first video signal are normal or not and transmitting the detection result to the selector further comprises:

outputting a second detection result when any one of the timing signal of the first video signal and the frame data of the first video signal does not meet the corresponding preset thresholds; and

selectively outputting, by the selector, the first video signal or the second video signal to the transmitter according to the detection result comprises:

selectively outputting, by the selector, the first video signal to the transmitter according to the first detection result, or

selectively outputting, by the selector, the second video signal to the transmitter according to the second detection result.

13. The control method according to claim 10 , wherein the video receiver comprises a first communication interface, and the transmitter comprises a second communication interface;

before determining whether the display controller is in normal operation state according to the first video signal received, the control method further comprises:

establishing a communication connection with the display controller using the first communication interface; and

establishing a communication connection with the display using the second communication interface.

14. The control method according to claim 13 , wherein

receiving, by the video receiver, the first video signal output by the display controller comprises:

receiving the first video signal output by the display controller using the first communication interface; and

transmitting, by the transmitter, the first video signal or the second video signal received to the display to play the video signal received, comprises:

transmitting the first video signal or the second video signal received to the display using the second communication interface.

15. The control method according to claim 13 , wherein

the first communication interface and the second communication interface are both Video-By-One (VBO) interfaces.

16. The control method according to claim 10 , wherein

the second video signal is a boot screen.

17. A non-transitory computer readable storage medium, storing a computer program, wherein the control method according to claim 10 is implemented when the computer program is executed by a processor.

18. A computer device, comprising: a processor and a memory storing a computer program that is executable on the processor, wherein the control method according to claim 10 is implemented when the computer program is executed by the processor.