Display controller, display device, display system, and control method

A control method applied to a display controller, wherein the display controller comprises:

• a flag-signal circuit configured to send a flag-signal to an application processor;
• an image processing circuit configured to obtain second current image data in response to receiving first current image data from the application processor, wherein the first current image data is sent by the application processor in response to receiving the flag-signal sent from the flag-signal circuit;
• and
• a drive circuit configured to generate a first drive control signal in response to receiving the second current image data from the image processing circuit,
• wherein the flag-signal circuit is further configured to send the flag-signal loaded with a first pulse signal to the application processor, and the flag-signal loaded with the first pulse signal is configured to indicate that the application processor is allowed to send the first current image data to the image processing circuit,
• wherein the image processing circuit is further configured to obtain, according to the first current image data, the second current image data in response to receiving the first current image data from the application processor, and the first current image data is sent by the application processor in response to receiving the flag-signal loaded with the first pulse signal, which is sent from the flag-signal circuit,
• wherein the first drive control signal comprises a scan start signal loaded with a second pulse signal,
• wherein the drive circuit is further configured to generate the scan start signal loaded with the second pulse signal in response to detecting that previous image data from the application processor is processed,
• wherein the flag-signal circuit is further configured to generate the flag-signal loaded with the first pulse signal in response to receiving the scan start signal loaded with the second pulse signal from the drive circuit, and
• wherein the control method comprises:
• sending, by the flag-signal circuit, the flag-signal to the application processor;
• obtaining, by the image processing circuit, the second current image data in response to receiving the first current image data from the application processor, wherein the first current image data is sent by the application processor in response to receiving the flag-signal sent from the flag-signal circuit;
• and
• generating, by the drive circuit, the first drive control signal in response to receiving the second current image data from the image processing circuit.