Patent ID: 7156313

Claim:
An IC card with a display panel but without batteries includes a communication interface connected to a signal-receiving element, a microprocessor, an EEPROM, a rectifier/voltage regulator, a display driver, a charge-pump disposed therein, and a display panel disposed thereon; wherein the microprocessor, after receiving the signals from the communication interface through said signal-receiving element, stores data in an EEPROM, wherein the communication interface also supplied power received through said signal-receiving element and communication interface to said rectifier/voltage regulator, causing the rectifier/voltage regulator to generate a current, and wherein the charge-pump converts the current generated by the rectifier/voltage regulator into a relatively higher voltage for the display driver to convert into driving signals of the display panel; and wherein the communication interface, after receiving the external data, firstly decrypts and decodes the data, then reads the data through the microprocessor and displays the data on the display panel.