Oki Electric Industry Co., Ltd.

Kazunari Sugita

Masaaki Iwamoto

Hiroharu Hirata

A display device ( ) having a portable card detection sensor ( ) for detecting mounting and removal of an IC card ( ), and a controller ( ) capable of reading out balance data and historical data of transaction from the IC card ( ) upon detection by the card detection sensor ( ) of the mounting of the IC card ( ), and displaying the respective data alternately on a display window( ). The mounting of the IC card ( ) is detected by the card detection sensor ( ) simply by mounting the IC card ( ) in the display device ( ), and the balance data and historical data of transaction are read out from the IC card ( ) and displayed alternately on the display window ( ) by the controller ( ).

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Tokyo, Japan

Kazunari Sugita