Content display device, content display method, portable terminal, program, and recording medium

A content display device comprising:

• display control means for causing a part of a three-dimensional object on which a plurality of images representing respective pieces of content to be displayed on a screen;
• determining means for determining a display part of the three-dimensional object which display part is displayed on the screen and determining priorities of the plurality of images in accordance with a position of the display part thus determined;
• image reading means for reading an image from a first memory so that the image is allowed to be displayed by the display control means, the first memory storing therein the plurality of images;
• a second memory in which the image thus read by the image reading means is stored;
• and
• deleting means for deleting the image from the second memory, every time the determining means determines the display part and the priorities, the image reading means reading an image that is given a highest priority and that is not stored in the second memory, and
• every time the determining means determines the display part and the priorities, the deleting means deleting, from the second memory, an image that is given a lowest priority and that is stored in the second memory.

A content display method for displaying, on a screen, a part of a three-dimensional object which is a polygonal column having side faces on each of which a plurality of images representing respective pieces of content are arranged,

• the content display method comprising the steps of:
• (a) determining a display part of the three-dimensional object which display part is displayed on the screen and determining priorities of the plurality of images in accordance with a position of the display part thus determined;
• (b) after the step (a), reading, from a first memory in which the plurality of images are stored, an image that is given a highest priority and that is not stored in a second memory so that the image is allowed to be displayed;
• (c) causing the image thus read in the step (b) to be stored in the second memory;
• and
• (d) after the step (a), deleting, from the second memory, an image that is given a lowest priority and that is stored in the second memory.

A content display device comprising:

• a display section which displays a part of a three-dimensional object which is a polygonal column having side faces on each of which a plurality of images representing respective pieces of content are arranged;
• an input section which is provided on the display section and receives a user input made by contact;
• contact detecting means for detecting a motion of a position of the contact;
• first display control means for, in a case where the contact detecting means detects a motion in a longitudinal direction of the polygonal column during display of a currently-displayed screen image, moving a display region of the three-dimensional object by scrolling in the longitudinal direction so that another screen image different from the currently-displayed screen image is displayed;
• second display control means for, in a case where the contact detecting means detects a motion in a direction orthogonal to the longitudinal direction of the polygonal column during display of the currently-displayed screen image, moving the display region by rotating the three-dimensional object on a longitudinal axis of the polygonal column so that another screen image different from the currently-displayed screen image is displayed;
• and
• mobility determining means for determining mobility of the display region to be moved by the first display control means and the second display control means so that images displayed on the another screen image have no missing part.

A content display method for a content display device including (i) a display section which displays a part of a three-dimensional object which is a polygonal column having side faces on each of which a plurality of images representing respective pieces of content are arranged and (ii) an input section which is provided on the display section and receives a user input made by contact,

• the content display method comprising the steps of:
• (a) detecting a motion of a position of the contact;
• (b) in a case where a motion in a longitudinal direction of the polygonal column is detected during display of a currently-displayed screen image in the step (a), moving a display region of the three-dimensional object by scrolling in the longitudinal direction so that another screen image different from the currently-displayed screen image is displayed;
• (c) in a case where a motion in a direction orthogonal to the longitudinal direction of the polygonal column is detected during display of the currently-displayed screen image in the step (a), moving the display region by rotating the three-dimensional object on a longitudinal axis of the polygonal column so that another screen image different from the currently-displayed screen image is displayed;
• and
• (d) determining mobility of the display region to be moved in the step (a) and the step (b) so that images displayed on the another screen image have no missing part.