| 摘要 |
PURPOSE: A bidirectional credit card using a radio frequency identification technique is provided to confirm remain cost, thereby controlling use of the credit card. CONSTITUTION: The size and the thickness of a credit card follow standard. An ultra thin type CPU(Central Processing Unit), a RFID circuit, a storage battery and ROM(Read Only Memory) are installed inside of the credit card. The credit card performs transceiving and output of data through wireless transceiving. Two LCD devices are arranged each on the front side of the credit card in 2 row type. A solar panel is installed on the top of the credit card. The solar panel is used as the power source of the credit card. |
