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Ic card

An external device, cholesteric phase technology, applied to recording media used in machines, optics, instruments, etc., can solve the problems of insufficient disclosure and effective use of cholesteric liquid crystals

Inactive Publication Date: 2006-08-30
FUJITSU LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, in the non-contact information recording and display method described in the aforementioned documents, only cholesteric liquid crystals are mentioned as an example of a memory liquid crystal display element, and how to effectively utilize cholesteric liquid crystals in an IC card is not fully mentioned. have the properties of this and the like
That is, a specific method for effectively utilizing the properties of cholesteric liquid crystals has not been sufficiently disclosed.

Method used

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Embodiment Construction

[0062] The best embodiments of the IC card and the external device according to the present invention will be described in detail below with reference to the accompanying drawings. Here, although exemplified in the following description is a non-contact IC card that communicates with an IC card and an external device in a non-contact form, the present invention is not limited thereto, and is also applicable to a contact IC card that communicates with an external device. IC cards and hybrid IC cards that have both contact and non-contact types.

[0063] (Embodiment 1)

[0064] First, the configuration of the IC card system according to Embodiment 1 will be described. figure 1 Shown is a configuration diagram of the IC card system according to the first embodiment. As shown in the figure, this IC card system is composed of a host computer 10 , a reader / writer 11 and an IC card 12 .

[0065] The host computer 10 is a computer that performs generation of data to be transmitted ...

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Abstract

An ic card for transmitting information to an external device and / or receiving information from an external device, capable of displaying information effectively making the most use of the characteristics of cholesteric liquid crystal. The ic card comprises information display means for displaying predetermined information by transmitting / reflecting light by a method in which a stack of cholesteric liquid crystal layers (631, 632) reflecting red light while in the planar state and a cholesteric liquid crystal layer (633) reflecting blue light, and voltages are applied to the stacked cholesteric liquid crystal layers (631, 632, 633)respectively to change the aligned state of cholesteric liquid crystal molecules between the planar and focal conic states.

Description

technical field [0001] The present invention relates to an IC card that transmits information to and / or receives information from an external device, and particularly relates to an IC card capable of maximizing the characteristics of cholesteric liquid crystals and effectively displaying information to improve user convenience IC card. Background technique [0002] Conventionally, integrated circuits (ICs, Integrated Circuits) such as built-in memories or microprocessors, and IC cards having information storage and processing functions have been widely used. IC cards further having a display function capable of displaying stored data have also begun to be used in recent years. [0003] Among the IC cards with a display function, there are thermal write type IC cards that use heat-sensitive chromophoric materials for printing and erasing, magnetic writing type IC cards that use magnetic materials for printing and erasing, and the like. [0004] However, in these display met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G06K19/00G02F1/1347G02F1/137G06K19/077G09G3/18
CPCG02F1/13473G06K19/07749G02F2001/13478G09G3/18G02F1/13718G06K19/07703G06K19/077G09G2310/06G06K19/07769G09G2310/0254G02F1/13478
Inventor 能势将树富田顺二新海知久山岸文雄西出兼三桥本繁杉村吉康矢部嘉一来住野太平野贵裕
Owner FUJITSU LTD