Interface circuit, source driver, and display device

An interface circuit provided in a source driver that drives a display device, the interface circuit receiving a plurality of data signals and supplying the plurality of data signals to a data latch circuit of the source driver, the interface circuit comprising:

• a timing signal generating circuit that receives a clock signal and that generates a timing signal indicating a timing to switch between a data input period in which the plurality of data signals are supplied to the data latch circuit and a non-input period in which the supply of the plurality of data signals is stopped, based on at least one of the plurality of data signals and the clock signal;
• a data control circuit that controls the supply of the plurality of data signals to the data latch circuit based on the timing signal;
• a plurality of driver error detection circuits that detect an error in the source driver;
• a selector circuit that selects one of the plurality of driver error detection circuits based on the plurality of data signals during the non-input period, and outputs a driver error detection signal indicating a detection result of the selected driver error detection circuit at a timing corresponding to the timing signal and the clock signal;
• an input error detection circuit that detects a data input error of the plurality of data signals and outputs an input error detection signal indicating a detection result;
• an OR circuit that outputs an OR signal indicating logical disjunction of the driver error detection signal and the input error detection signal;
• and
• a signal output unit that includes a first conductivity type MOS transistor having a gate terminal connected to an output part of the OR circuit and a source terminal connected to a prescribed potential, and a signal output line connected to a drain terminal of the MOS transistor.