On card display of data from secured chip
First Claim
Patent Images
1. A retrofitted smart card comprising:
- a certified smart card chip;
a display;
retrofitted emulation circuitry operative to enable said certified smart card chip to communicate information to said display notwithstanding that said certified smart card chip is configured for communication only with an external read/write device; and
retrofit firmware for operating said certified smart card chip at least in the absence of an external read/write device; and
a display control switch;
wherein, upon actuation of the display control switch, voltage is supplied to the certified smart card chip thereby enabling the certified smart card chip to run the retrofit firmware, wherein the retrofit firmware can distinguish between operation in communication with the external read/write device and operation in a stand alone mode;
wherein when the retrofit firmware detects operation in the stand-alone mode;
I) the retrofit firmware controls communications to and from said certified smart card chip;
II) the retrofit firmware employs clock signals received from a clock oscillator;
III) the retrofit firmware operates the certified smart card chip for processing and displaying secure data on the display;
IV) the retrofit firmware configures a display driver to display said secure data;
V) the retrofit firmware sets a predetermined time duration on an interval timer;
orVI) the retrofit firmware issues a single instruction which results in the sequence indicated below;
a) a supply of electrical power to the certified smart card chip is terminated, thus disabling the retrofit firmware; and
b) once the supply of electrical power to said certified smart card chip has been terminated and the retrofit firmware has been disabled, the display driver causes the display to display the secure data for a predetermined time duration; and
c) at the end of the predetermined time duration, the supply of electrical power to said display is terminated.
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Accused Products
Abstract
A retrofitted credit card including a certified smart card chip, a display and retrofitted emulation circuitry operative to enable the certified smart card chip to communicate information to the display notwithstanding that the certified smart card chip is configured for communication only with an external read/write device.
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Citations
19 Claims
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1. A retrofitted smart card comprising:
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a certified smart card chip; a display; retrofitted emulation circuitry operative to enable said certified smart card chip to communicate information to said display notwithstanding that said certified smart card chip is configured for communication only with an external read/write device; and retrofit firmware for operating said certified smart card chip at least in the absence of an external read/write device; and a display control switch; wherein, upon actuation of the display control switch, voltage is supplied to the certified smart card chip thereby enabling the certified smart card chip to run the retrofit firmware, wherein the retrofit firmware can distinguish between operation in communication with the external read/write device and operation in a stand alone mode; wherein when the retrofit firmware detects operation in the stand-alone mode; I) the retrofit firmware controls communications to and from said certified smart card chip; II) the retrofit firmware employs clock signals received from a clock oscillator; III) the retrofit firmware operates the certified smart card chip for processing and displaying secure data on the display; IV) the retrofit firmware configures a display driver to display said secure data; V) the retrofit firmware sets a predetermined time duration on an interval timer;
orVI) the retrofit firmware issues a single instruction which results in the sequence indicated below; a) a supply of electrical power to the certified smart card chip is terminated, thus disabling the retrofit firmware; and b) once the supply of electrical power to said certified smart card chip has been terminated and the retrofit firmware has been disabled, the display driver causes the display to display the secure data for a predetermined time duration; and c) at the end of the predetermined time duration, the supply of electrical power to said display is terminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of providing a smart card with a card-mounted display function comprising:
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providing a certified smart card chip; associating a display with said certified smart card chip; emulating an external read/write device to enable said certified smart card chip to communicate with said display notwithstanding that said certified smart card chip had originally been configured for secure communication only with an external read/write device; running retrofit firmware residing on said certified smart card chip for operating said certified smart card chip at least in the absence of an external read/write device; providing a switch actuation signal when a user actuates a display control switch; and responsive to said switch actuation signal, supplying a voltage to said certified smart card chip and simultaneously actuating a clock oscillator which begins to provide a clock signal to a clock terminal of said certified smart card chip. - View Dependent Claims (15, 16, 17, 18)
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19. A retrofitted smart card comprising:
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a certified smart card chip; a display; retrofitted emulation circuitry operative to enable said certified smart card chip to communicate information to said display notwithstanding that said certified smart card chip is configured for communication only with an external read/write device; and retrofit firmware for operating said certified smart card chip at least in the absence of an external read/write device; a display control switch;
power management circuitry including a switch actuation sensor which is coupled to said display control switch, said switch actuation sensor providing a switch actuation output to first and second relay control circuits;wherein, upon actuation of the display control switch, voltage is supplied to the certified smart card chip thereby enabling the certified smart card chip to run the retrofit firmware, wherein the retrofit firmware can distinguish between operation in communication with the external read/write device and operation in a stand alone mode; wherein said retrofitted circuitry comprises control logic circuitry which receives electrical power from said power management circuitry; and wherein said second relay control circuit is operative in response to said switch actuation output to provide electrical power to said control logic circuitry, to a display driver and to an interval timer.
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Specification