1. A video signal processing device, different partial areas in a display area being respectively a first area and a second area comprising: a motion vector detection circuit to detect, by using a first broad image corresponding to the display area of a first frame and a second broad image corresponding to the display area of a second frame, a motion vector which represents a motion between the first broad image and the second broad image; a first interpolated partial image generation circuit to generate, by using a first partial image corresponding to the first area of the first frame, a second partial image corresponding to the first area of the second frame, and the motion vector, a first interpolated partial image that is inserted between the first frame and the second frame and corresponds to the first area; and a second interpolated partial image generation circuit to generate, by using a third partial image corresponding to the second area of the first frame, a fourth partial image corresponding to the second area of the second frame, and the motion vector, a second interpolated partial image that is inserted between the first frame and the second frame and corresponds to the second area, wherein the first area and the second area do not overlap each other.