Patent ID: 8610733

Claim:
An image display device comprising: a storage portion configured to store image data for a first frame constituting a 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 said first frame into said first and second memory areas and to write the image data for said second frame into said first and third memory areas but not into said second memory area even though the image data for said second frame is identical with the image data for said first frame; a reading portion configured to read the image data for said first frame from said first and second memory areas and to read the image data for said second frame from said first and third memory areas, said reading portion changing a scanning line direction for the image data for said 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 said image data prior to the writing into said storage portion; and a display portion configured to output the image data for said first and second frames read by said reading portion in time sequence in a visible manner.