Detection circuit of gate driver, array substrate, display device and detection method thereof

A detection method of a display device comprising an array substrate, wherein the array substrate comprises a gate driver comprising a plurality of signal output ends, a plurality of gate lines, one of the plurality of gate lines being coupled with one of the plurality of signal output ends, a plurality of drive circuits arranged in an array, one of the plurality of drive circuits being coupled with at least one gate line, and a detection circuit;

• wherein the detection circuit comprises:
• a plurality of first signal deriving sub-circuits, wherein a control end of each first signal deriving sub-circuit is coupled with a control signal line, and an input end of the each first signal deriving sub-circuit is coupled with at least one signal output end of the gate driver;
• a plurality of second signal deriving sub-circuits, wherein the plurality of second signal deriving sub-circuits are in one-to-one correspondence with the plurality of first signal deriving sub-circuits, a control end of each second signal deriving sub-circuit is coupled with an output end of a corresponding first signal deriving sub-circuit, the control end of the each second signal deriving sub-circuit is coupled with a signal output end which is coupled with the corresponding first signal deriving sub-circuit, and an output end of the each second signal deriving sub-circuit is coupled with a detection signal line;
• and
• a discrimination circuit;
• wherein the gate driver comprises a plurality of cascaded shifting registers, each shifting register comprises at least two signal output ends, and respective signal output ends of the each shifting register are coupled with different detection signal lines;
• wherein the method comprises:
• controlling the plurality of signal output ends of the gate driver to output gate scanning signals in sequence;
• loading a first reference signal to the control signal line in a detection time period, wherein the first signal deriving sub-circuits transmit the gate scanning signals output by coupled signal output ends to the second signal deriving sub-circuits under the control of the first reference signal, and the second signal deriving sub-circuits transmit received gate scanning signals to a coupled detection signal line under the control of the gate scanning signals output by the coupled signal output ends;
• and
• performing, by the discrimination circuit, abnormality diagnosis on the gate scanning signals transmitted by the detection signal line.