Image data transmission device and method, electronic apparatus, medium, and display system

An image data transmission device, comprising:

• a receiving sub-circuit configured to receive image data sent by a mainboard;
• a writing control component configured to write, in response to the receiving sub-circuit being in a locked state, image data received by the receiving sub-circuit in each clock cycle of a first frame synchronous signal into a frame of a memory according to the first frame synchronous signal, the first frame synchronous signal being an associated clock signal, and stop, in response to the receiving sub-circuit being in an unlocked state, writing the image data to the memory;
• a reading control component configured to read, in response to the receiving sub-circuit being in the locked state, a frame from the memory in each clock cycle of a second frame synchronous signal according to the second frame synchronous signal, wherein a first time interval exists between writing and reading a same frame, the first time interval has a length greater than or equal to a length of the clock cycle of the first frame synchronous signal, and the second frame synchronous signal is a local clock signal;
• and
• a sending component configured to send the frame read by the reading control component to a display component,
• wherein the image data transmission device further comprises a selecting component, wherein
• the reading control component is further configured to read the frame from the memory in each clock cycle of the second frame synchronous signal and send the frame to the selecting component;
• the selecting component is configured to send, in response to the receiving sub-circuit being in the locked state, each frame read by the reading control component to the sending component;
• and send, in response to the receiving sub-circuit being in the unlocked state, a predetermined prompt frame to the sending component;
• and
• the sending component is configured to send the frame selected by the selecting component to the display component,
• wherein the selecting component is further configured to send, in response to the receiving sub-circuit being adjusted to the unlocked state, the prompt frame to the sending component after a second time interval, and wherein the second time interval has a length smaller than or equal to a length of the clock cycle of the second frame synchronous signal.