Patent ID: 8159507

Claim:
A display device comprising: a displaying unit which enlarges/contracts, when images and enlargement/contraction ratios are provided in a plurality of pairs, the images at the enlargement/contraction ratios and displays the images on a display screen; a measuring unit which measures a distance between the display screen and a user looking at images displayed on the display screen; an enlargement/contraction ratio acquiring unit which acquires text and graphic enlargement/contraction ratios determined based on the measured distance; a text-containing image generating unit which generates a text-containing image with a predetermined size which represents a string to be presented to the user; a graphic image generating unit which generates a graphic image with a predetermined size which represents a graphic to be presented to the user; and a control unit which controls the displaying unit by giving a pair of the generated graphic image and the acquired graphic enlargement/contraction ratio to the displaying unit and by giving a pair of the generated text-containing image and the acquired text enlargement/contraction ratio to the displaying unit, wherein: as the measured distance increases, the graphic enlargement/contraction ratio is set to increase; when the measured distance changes, a rate of change in the text enlargement/contraction ratio is set to be smaller than a rate of change in the graphic enlargement/contraction ratio; the displaying unit, when display positions of the images are also given, enlarges/contracts the images at the display positions on the display screen; the control unit controls the displaying unit by giving a display position of the graphic image and a display position of the text-containing image on the display screen to the displaying unit, such that a display region of the graphic image and a display region of the text-containing image are entirely within bounds of the display screen and such that as the measured distance decreases, and area of overlap decreases between the display region of the graphic image and the display region of the text-containing image on the display screen; the control unit sets on the display screen a predetermined graphic reference position, a predetermined graphic reference direction, a predetermined text reference position, and a predetermined text reference direction such that the predetermined graphic reference direction and the predetermined text reference direction form a blunt angle; and the control unit controls the displaying unit by giving a display position of the graphic image and a display position of the text-containing image on the display screen to the displaying unit such that as the measured distance decreases, the display position of the graphic image gradually moves from the predetermined graphic reference position in the predetermined graphic reference direction and the display position of the text-containing image gradually moves from the predetermined text reference position in the predetermined text reference direction.