Patent ID: 7203784

Claim:
An electronic card system structured by one or more portable recording mediums that is readable and writable in a contactless state via radio waves, and a holding device that holds the recording mediums, the electronic card system comprising: the recording medium that includes an information storing unit operable to store digital information, and a sending/receiving unit operable to transmit the digital information via radio waves; and the holding device that includes a holding unit provided with a medium holding plate and a plurality of sets that each include a transmitting unit and a lighting unit, the medium holding plate being divided into partitions of an identical number with the sets, the sets each being disposed so as to face a different one of the partitions, the transmitting units each reading, via the radio waves, the digital information from the recording medium that is held on the medium holding plate so as to cover at least a part of the partition that faces the transmitting unit, and each outputting the digital information to a controlling unit, and the lighting units each emitting light under control of the controlling unit, the controlling unit operable to receive the digital information, to generate display information based on the received digital information and output the generated display information, and to control a lighting unit corresponding to the transmitting unit that has the digital information to emit light, and a displaying unit operable to receive and display the display information.