Cell-free display type IC card

Abstract

The invention relates to a display type IC card without cell, which positions a communication interface, a microprocessor, a non-volatilize read and write storage, a constant-voltage rectifier circuit, a display driving circuit and a boosted circuit inside the card and arranges a display on the surface of the card to receive the external data; the microprocessor reads the data and displays the data on the display screen to provide the user to check the external data. The display screen is a two state display screen, when the data is displayed, the display screen need not to power continuously, but the display data can be restored until the data updating. The communication interface is a non-touching radio-frequency interface or a touching communication interface; the inner power can use the radio-frequency interface circuit to receive the radio-frequency signal; the signal can be rectified to dc voltage to provide to the inner working voltage; it also can use the power signal of the non-touching communication interface to provide the power.

Description

technical field [0001] The present invention relates to a battery-free display IC card. The display has a bistable function; the internal power supply is supplied by a communication interface, and the interface can be a non-contact radio frequency interface or a contact communication interface. Background technique [0002] Due to the advancement of technology, many transaction and payment methods have been gradually replaced by IC cards, such as: credit cards, debit cards and telephone cards, bus, MRT stored-value cards, etc., and the IC cards currently in circulation are generally based on communication interfaces. Can be divided into the following types: [0003] The first type is contact interface: it can be divided into smart card and memory card; among them, the characteristics of smart card are: it has the function of control mechanism, contains a microprocessor, which can be divided into 8 bits, 16 bits or 32 bits, and additional Encryption processing such as DES an...

AI Technical Summary

Problems solved by technology

However, for the IC card of this invention, the power required to drive the relevant devices is to use the solar cell on the surface of the card as the power supply to supply the required voltage source for the IC card, or to use the secondary rechargeable battery installed in the card. As a backup power supply, and relying on the user to control the touch buttons to read data, although this can highlight the excellent performance of this card, but in the actual commercialization process, it is found that the production process is more complicated, and because of The solar battery, secondary rechargeable battery and touch buttons also account for a large proportion of the production cost of the entire IC card. Therefore, after evaluating how to shorten the production process and reduce the cost, the inventors invented a battery-free IC card. The display IC card can also provide display and reference functions and the cost is lower

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