Display system and display system detection method

A display system, wherein the display system comprises a main control board and a controlled board, wherein the main control board is electrically connected to the controlled board through a cable, wherein the main control board comprises a connection resistance detection circuit, wherein the connection resistance detection circuit is configured to detect a connection resistance between the main control board and the controlled board, and wherein the connection resistance detection circuit comprising:

• a main control unit configured to output a first detection signal to a switch unit and calculate the connection resistance according to a connection voltage and a detection current;
• a switch unit electrically connected to the cable and the main control unit, wherein the switch unit is configured to control the cable to generate a detection current and a detection voltage according to the first detection signal;
• a constant current control unit electrically connected to the cable, wherein the constant current control unit is configured to stabilize the detection current and the detection voltage;
• and
• a voltage detection unit electrically connected to the cable and the main control unit, wherein the voltage detection unit is configured to generate a connection voltage according to the detection voltage, and send the connection voltage and the detection current to the main control unit.