A short delay time from imaging of an imaging element to displaying on a view finder is realized using a simple circuit configuration. An EVF controller includes a serial I/F that receives a command including the number of valid lines of one frame, a counter that counts the number of lines of which an image signal becomes valid, a data input unit that inputs a valid image signal based on a data enable signal, a data output unit that outputs the input valid image signal to an EVF, and a timing generation unit that compares a count value of the counter with the number of valid lines, detects an end of the input of the valid image signal in the frame based on a comparison result, and then starts a process for preparation for a next frame.