A display unit includes: a display panel for displaying a plurality of information images; a memory for storing a plurality of image data elements corresponding to the information images; an image memory for storing the image data elements transferred from the memory; and a controller for controlling the display panel to display the information images based on the image data elements in the image memory. The controller transfers a part of the image data elements to the image memory on ahead when the display unit starts to operate, and the controller controls the display panel to display a part of information images on ahead based on the part of the image data elements.