Device and method for driving display panel

A display driving device comprising:

• a low-speed communication circuit configured to transmit configuration data at a first data rate in a first mode;
• a high-speed communication circuit configured to transmit a clock training signal to train a communication clock signal at a second data rate in a second mode, to transmit image and first control data according to the communication clock signal in a third mode, and to transmit second data according to the communication clock signal in a fourth mode;
• and
• a control circuit configured to switch the first mode to the second mode upon completion of the first mode, to switch the second mode to the third mode upon completion of the second mode, to switch the third mode to the second mode when an abnormal state is detected in the third mode, and to switch the fourth mode to the first mode when an abnormal state is detected in the fourth mode.

A display driving method comprising:

• receiving configuration data at a first data rate in a first mode;
• switching the first mode to a second mode upon completion of the first mode;
• training a communication clock signal for communication at a second data rate in the second mode;
• switching the second mode to a third mode upon completion of the second mode;
• receiving image data and first control data using the communication clock signal in the third mode;
• receiving second control data using the communication clock signal in a fourth mode;
• switching the third mode to the second mode when an abnormal state is detected in the third mode;
• switching the fourth mode to the first mode when an abnormal state is detected in the fourth mode;
• and
• controlling pixels of a display panel to be driven according to the image data.