Image display device, electronic device, display controller and display control method

Abstract

The present invention suppresses a phenomenon in which an oblique line appears on a display screen when the scanning line direction of a moving image is changed in an image memory. To accomplish the above-mentioned object, an image display device includes: a storage portion configured to store image data for a first frame constituting the moving image and for a second frame subsequent to the first frame, and having first to third memory areas; a writing portion configured to write the image data for the first frame into the first and second memory areas and to write the image data for the second frame into the first and third memory areas; a reading portion configured to read the image data for the first frame from the first and second memory areas and to read the image data for the second frame from the first and third memory areas, the reading portion changing a scanning line direction for the image data for the first and second frames to be read to a second scanning line direction different from a first scanning line direction that is a scanning line direction for the image data prior to the writing; and a display portion configured to output the image data for the read first and second frames in time sequence in a visible manner.