Display medium rewriting device, display device, display medium rewriting method, and display rewriting program

A display medium rewriting device comprising:

• a detection section that detects the respective presences of a card stored with predetermined identification data and provided with an antenna for transmitting and receiving the identification data, and a display medium that displays an image by using contactless power supply from a supply section and retains displayed images even in a state in which power supply has ceased;
• the supply section that supplies power to the display medium;
• and
• an image rewriting section that controls image rewriting to the display medium such that power is supplied to the display medium by the supply section and an image according to the identification data acquired through the antenna is displayed in cases in which the respective presences of the card and the display medium have been detected by the detection section, and that, in a state in which an image is displayed on the display medium, controls image rewriting to the display medium such that the image is displayed until the presence of the card has ceased to be detected by the detection section and a predetermined erasure condition for erasing images on the display medium has been fulfilled, and the image displayed on the display medium is erased in cases in which the presence of the card has ceased to be detected by the detection section and the erasure condition has been fulfilled.

A display medium rewriting method that is a display medium rewriting method in which image rewriting to a display medium is performed using a display medium rewriting device that includes a supply section, a detection section, and an image rewriting section, the method comprising:

• a detection step that detects the respective presences of a card stored with predetermined identification data and provided with an antenna for transmitting and receiving the identification data, and a display medium that displays an image by using contactless power supply from the supply section and retains displayed images even in a state in which power supply has ceased, using a detection section that detects these presences;
• and
• an image rewriting step of performing image rewriting using the image rewriting section, that performs image rewriting to the display medium such that that power is supplied to the display medium and an image according to the identification data acquired through the antenna is displayed on the display medium in cases in which the respective presences of the card and the display medium have been detected by the detection section, and that, in a state in which an image is displayed on the display medium, controls image rewriting to the display medium such that the image is displayed until the presence of the card has ceased to be detected by the detection section and a predetermined erasure condition for erasing images on the display medium has been fulfilled, and the image displayed on the display medium is erased in cases in which the presence of the card has ceased to be detected by the detection section and the erasure condition has been fulfilled.