| 摘要 |
PURPOSE: A smart card is provided to support a purchasing product without an additional check of purchased products by calculating the information, such as sort, number, of products put in a cart automatically. CONSTITUTION: A smart card contains a cart, an antenna device, a signal processor(20), a display(30) and a power unit. The cart loads and carries products. The antenna device is installed in the cart, supplies driving power to RF(Radio Frequency) tags of each products inside the cart. The signal processor contains a modulation/demodulation unit and a microcomputer. The modulation/demodulation unit demodulates RF-modulated ID(Identification) information of the RF tags from the antenna device and converts to digital ID information. The microcomputer receives the ID information of each product form the modulation/demodulation unit, calculates the kinds, the prices and the number of the products inside the cart and generates the information of a cart unit. The display displays the information from the signal processor. The power unit has a battery(41) and a charging contact. The battery supplies operating power to the antenna device, the signal processor and the display. The charging contact feeds external charging voltage to the battery.
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