Display control system, display apparatus and control method

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.