Abstract: A perspective projection conversion is performed on a 3-dimensional object onto a plurality of virtual planes. After image information corresponding to each plane is stored in a flat buffer, the image information is read from the flat buffer for each of a plurality of sectioned areas forming each of a plurality of planes, and stored in a corresponding area in a frame buffer, and the image corresponding to the image information stored in the frame buffer is projected onto a curved surface screen through a wide-angle lens, thus disclosing the image display device.