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Smart card with non-volatile display using temperature-sensitive electronic ink

An electronic ink and display technology, applied in the field of smart cards, can solve the problems of invisible data on the card and no power of the energy storage device.

Inactive Publication Date: 2010-05-26
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Again, the high power consumption of the display on the smart card means that the energy storage device may die, making the data on the card invisible without a terminal into which the card can be inserted

Method used

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  • Smart card with non-volatile display using temperature-sensitive electronic ink
  • Smart card with non-volatile display using temperature-sensitive electronic ink
  • Smart card with non-volatile display using temperature-sensitive electronic ink

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] figure 1 A first embodiment of a smart card 100 is shown comprising a display 101 including an indicator 103 for indicating the amount remaining on the card. like figure 1 As shown, the pointer 103 can move between a full position and an empty position according to the remaining amount. The shown area 102 is heat sensitive and causes the pointer 103 to appear or disappear depending on the temperature of the card. Small conductors 104 are shown in dotted lines. These conductors may be within the surface of the smart card 100 to transfer heat to the temperature sensitive electronic ink contained in the display 101 .

[0016] In operation, when the user holds their thumb over the area 102 for a few seconds, the card is heated to human temperature and the pointer 103 becomes visible. This heat is transferred to the display 101 through the conductor 104 . When the user removes the finger and puts the card back into the wallet or wallet, the temperature drops and the poi...

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PUM

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Abstract

A smart card is disclosed in which selective display is accomplished by utilizing heat and / or light sensitivity to cause the display to be viewable selectively, and only at desired times. The smart card may use e-ink so that it can be altered when combined with a terminal.

Description

technical field [0001] The present invention relates to "smart cards", also known as integrated circuit ("IC") cards, which are small credit card-like devices that can include storage and / or processing capabilities. In particular, the present invention relates to smart cards for use in various business applications, including the option to display information stored thereon, and the ability to run different applications on the same card. Background technique [0002] A smart card is a small credit card-sized device that typically includes processing power and memory on it. These cards are used to store amounts for subsequent spending, to obtain various services, and to track various other items involving the merchant system in which the card is used. These smart cards contain limited display possibilities. Typically, for any information to be displayed on a smart card, the card must be inserted into the terminal. The terminal then retrieves the selected information stored...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/07G06K19/16B41J3/407G06K1/12G06K19/06
CPCG06K19/07G06K1/12G06K19/06046G06K19/07703B41J3/4076
Inventor J·普勒尼斯
Owner NXP BV
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