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KR100820317B1 - Smart card with display function - Google Patents

Smart card with display function Download PDF

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Publication number
KR100820317B1
KR100820317B1 KR1020050070476A KR20050070476A KR100820317B1 KR 100820317 B1 KR100820317 B1 KR 100820317B1 KR 1020050070476 A KR1020050070476 A KR 1020050070476A KR 20050070476 A KR20050070476 A KR 20050070476A KR 100820317 B1 KR100820317 B1 KR 100820317B1
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smart card
liquid crystal
crystal display
display device
panel
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KR20070016200A (en
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양재우
김완수
우성일
김시재
이종헌
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양재우
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
    • G06K19/07703—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual
    • G06K19/07707—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual the visual interface being a display, e.g. LCD or electronic ink
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
    • G06K19/025—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine the material being flexible or adapted for folding, e.g. paper or paper-like materials used in luggage labels, identification tags, forms or identification documents carrying RFIDs

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

본 발명은 디스플레이 기능을 갖는 스마트 카드에 관한 것으로, 보다 상세히는 플렉시블한 재질의 액정표시소자를 채택하여 굽힘 등의 외부 충격에 대한 유연성 및 내구성이 향상되도록 함은 물론, 액정표시소자와 구동회로 소자를 일체화하여 스마트 카드의 내부구조를 단순화함으로써 박형화가 가능하도록 한 디스플레이 기능을 갖는 스마트 카드에 관한 것이다.The present invention relates to a smart card having a display function, and more particularly, to adopt a flexible liquid crystal display device to improve flexibility and durability against external impact such as bending, as well as a liquid crystal display device and a driving circuit device. The present invention relates to a smart card having a display function that enables thinning by simplifying the internal structure of the smart card.

본 발명은, 디스플레이 기능을 갖는 스마트 카드에 있어서, 상기 스마트 카드는, 윈도우가 형성되고 플렉시블한 플라스틱 재질의 상부 패널과, 상기 상부 패널과 일체로 조합되는 플렉시블한 하부 패널로 구성되고, 상기 상부 및 하부 패널 사이에는 액정표시소자, 집적회로칩, 구동회로 소자 및 박막전지가 회로연결되어지되, 상기 액정표시소자의 상하부 기판은 플렉시블한 플라스틱 재질로 이루어지고, 상기 액정표시소자의 하부기판은 구동회로 소자와 일체로 형성되는 것을 특징으로 한다.According to an aspect of the present invention, there is provided a smart card having a display function, wherein the smart card includes a top panel made of a flexible plastic material having a window, and a flexible bottom panel integrally combined with the top panel. A liquid crystal display device, an integrated circuit chip, a driving circuit device, and a thin film battery are connected to the lower panel by a circuit. The upper and lower substrates of the liquid crystal display device are made of a flexible plastic material, and the lower substrate of the liquid crystal display device is a driving circuit. It is characterized in that it is formed integrally with the element.

스마트 카드, 상부 패널, 하부 패널, 액정표시소자, 구동회로 소자, 집적회로칩, 박막전지 Smart card, upper panel, lower panel, liquid crystal display device, driver circuit device, integrated circuit chip, thin film battery

Description

디스플레이 기능을 갖는 스마트 카드{Smart card with display function}Smart card with display function

도 1은 본 발명에 따른 디스플레이 기능을 갖는 스마트 카드의 개략적인 사시도1 is a schematic perspective view of a smart card having a display function according to the present invention;

도 2는 본 발명에 따른 디스플레이 기능을 갖는 스마트 카드의 분해사시도Figure 2 is an exploded perspective view of a smart card having a display function according to the present invention

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10...상부 패널 11...액정표시소자10 ... Top panel 11 ... Liquid crystal display element

12...상부 기판 12'..하부기판12 ... top board 12 '.. bottom board

13...집적회로칩 15...박막전지13 Integrated circuit chip 15 Thin film battery

20...하부패널20.Lower panel

본 발명은 교통카드나 신용카드 등에서 잔고 등을 표시하고자 구비된 디스플레이 기능을 갖는 스마트 카드에 관한 것으로, 플렉시블한 재질의 액정표시소자를 채택하여 굽힘 등의 외부 충격에 대한 유연성이 향상되도록 함은 물론, 액정표시소자와 구동회로 소자를 일체화하여 스마트 카드의 내부구조를 단순화함으로써 박형화가 가능하도록 한 디스플레이 기능을 갖는 스마트 카드에 관한 것이다.The present invention relates to a smart card having a display function provided to display a balance, such as in a traffic card or credit card, by adopting a flexible liquid crystal display element to improve the flexibility against external impact such as bending, as well as The present invention relates to a smart card having a display function in which a liquid crystal display element and a driving circuit element are integrated to simplify a smart card's internal structure, thereby making it thinner.

일반적으로 스마트 카드는 집적회로칩이 내장된 카드이며, 상기 집적회로칩에 다양한 정보를 수록하여 신분증, 면허증, 교통카드, 신용카드 등 다양한 목적으로 사용될 수 있는 것이다.In general, a smart card is a card with an integrated circuit chip, which can be used for various purposes, such as an identification card, a license card, a traffic card, and a credit card, by recording various information on the integrated circuit chip.

현재 개발된 디스플레이부가 구비된 스마트 카드는 등록특허 제 467671 호의 '스마트 카드', 공개특허 출원번호 제 10-2000-42149 호의 '스마트 카드'와 같은 것을 들 수 있다.Smart cards with a display unit currently developed include the same as the 'smart card' of Patent No. 467671 and the 'smart card' of Publication No. 10-2000-42149.

상기 선행기술은 모두 상부 및 하부 패널 사이에 회로기판이 장착되는 구조, 더욱 자세히는 상기 상부 및 하부 패널의 크기에 대응되며 액정표시소자, 입력부, 집적회로칩, 구동회로 소자 등이 배치된 회로기판이 장착되는 구조이다.The prior art has a structure in which a circuit board is mounted between an upper panel and a lower panel, and more specifically, a circuit board in which a liquid crystal display device, an input unit, an integrated circuit chip, a driving circuit element, etc. are disposed corresponding to sizes of the upper and lower panels. This is the structure to be mounted.

그러나, 회로기판을 설계함에 있어서, 통상 상기 입력부 및 액정표시소자의 구동을 제어하는 구동회로 소자라든가, 집적회로칩 등과 같은 부품은 상기 회로기판 상의 별도의 영역에 배치되어야 하며, 그만큼 회로기판 설계가 번거롭고 비용이 증가되는 문제점이 발생하게 된다.However, in designing a circuit board, a component such as a driving circuit element for controlling the driving of the input unit and the liquid crystal display device, an integrated circuit chip, or the like must be arranged in a separate area on the circuit board. The troublesome and costly problem arises.

뿐만 아니라, 상부 및 하부 패널의 두께에 회로기판의 두께가 더 증가하게 되어 휴대성이 떨어지게 됨은 물론 플렉시블하지 못하여 휘거나 구부리는 등의 외부 충격에 파손될 위험에 상시 노출되게 된다.In addition, the thickness of the circuit board is further increased to the thickness of the upper and lower panels, thereby reducing the portability and of being exposed to the risk of being damaged by external impacts such as bending or bending due to inflexibility.

그러므로, 구동회로 소자 또는 집적회로칩 등과 같은 부품의 배치가 이루어지는 회로기판으로 인한 두께 증가가 없으며, 효율적인 구성 부품 배치가 이루어져 제조공정의 효율성을 높이는 설계 방법의 개발이 절실하다고 하겠다.Therefore, there is no increase in thickness due to a circuit board on which components such as a driving circuit element or an integrated circuit chip are arranged, and development of a design method to increase the efficiency of a manufacturing process by making an efficient component arrangement is urgently needed.

본 발명은 상기와 같은 문제점을 해결하기 위해 안출된 것으로, 스마트 카드의 내부 구조를 단순화하고 효율적인 부품 배치가 가능하도록 함은 물론 박형화 및유연성의 향상이 가능하도록 하는 디스플레이 기능을 갖는 스마트 카드를 제공하고자 하는데 목적이 있다.The present invention has been made to solve the above problems, and to provide a smart card having a display function to simplify the internal structure of the smart card and to enable efficient component placement, as well as to improve the thickness and flexibility. The purpose is to.

상기 목적을 달성하기 위한 본 발명에 따른 디스플레이 기능을 갖는 스마트 카드는, 디스플레이 기능을 갖는 스마트 카드에 있어서, 상기 스마트 카드는, 윈도우가 형성되고 플렉시블한 플라스틱 재질의 상부 패널과, 상기 상부 패널과 일체로 조합되는 플렉시블한 하부 패널로 구성되고, 상기 상부 및 하부 패널 사이에는 액정표시소자, 집적회로칩, 구동회로 소자 및 박막전지가 회로연결되어지되, 상기 액정표시소자의 상하부 기판은 플렉시블한 플라스틱 재질로 이루어지고, 상기 액정표시소자의 하부기판은 구동회로 소자와 일체로 형성되는 것을 특징으로 한다.A smart card having a display function according to the present invention for achieving the above object is a smart card having a display function, wherein the smart card is integral with the upper panel and the upper panel is formed of a flexible plastic material window It consists of a flexible lower panel which is combined with a liquid crystal display device, an integrated circuit chip, a driving circuit device and a thin film battery is connected between the upper and lower panels, the upper and lower substrates of the liquid crystal display device is a flexible plastic material The lower substrate of the liquid crystal display element is formed integrally with the driving circuit element.

이하, 본 발명에 따른 바람직한 실시예에 대하여 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

먼저, 도 1은 본 발명에 따른 디스플레이 기능을 갖는 스마트 카드의 개략적인 사시도를 나타낸 것으로, 도시된 바와 같이 본 발명에 따른 디스플레이 기능이 구비된 스마트 카드는 카드 본체(1) 상에 액정표시소자(11)가 구비되어 있는 구성이다.First, FIG. 1 is a schematic perspective view of a smart card having a display function according to the present invention. As shown, a smart card with a display function according to the present invention is provided on a card body 1 with a liquid crystal display device ( 11) is provided.

여기서, 온/오프 동작을 행하는 전원 버튼이나 기타 기능키들로 구성된 입력부(18)와, 접촉식 스마트 카드의 경우 외부 단말기와의 상호 인터페이스를 위하여 외부접촉전극(19)을 카드 본체(1) 상에 선택적으로 구비되도록 할 수도 있다.Here, the input unit 18 consisting of a power button for performing the on / off operation or other function keys, and in the case of a contact smart card, an external contact electrode 19 on the card body 1 for mutual interface with an external terminal. It may be optionally provided.

상기 카드 본체(1)는 후술할 상부 및 하부 패널(10, 20)로 구성되며 얇으면서도 굽힘과 압력 등에 대한 내구성이 우수한 플라스틱 재질로 이루어지게 된다.The card body 1 is composed of the upper and lower panels 10 and 20 to be described later, and is made of a plastic material having excellent durability against thinness and bending and pressure.

도 2는 본 발명에 따른 디스플레이 기능을 갖는 스마트 카드의 분해사시도이다.2 is an exploded perspective view of a smart card having a display function according to the present invention.

도시된 바와 같이, 본 발명은 크게 상부 패널(10), 액정표시소자(11), 집적회로칩(13), 구동회로소자(미도시), 박막전지(15) 및 하부패널(20)로 구성된다.As shown, the present invention is composed of the upper panel 10, the liquid crystal display device 11, the integrated circuit chip 13, the driving circuit device (not shown), the thin film battery 15 and the lower panel 20. do.

여기서, 상기 상부 패널(10)에는 액정표시소자(11)가 노출되어 디스플레이 기능을 수행하도록 적어도 하나 이상의 윈도우(W)가 형성되며, 상기 윈도우(W)의 개수 및 위치는 용도에 따라 적절히 변형 및 응용이 가능하다.Here, at least one window (W) is formed in the upper panel 10 to expose the liquid crystal display device 11 to perform a display function, and the number and position of the windows (W) may be appropriately modified and Application is possible.

상기 상부 패널(10)의 윈도우(W)에 대응되는 액정표시소자(11)는 도시된 바와 같이 플렉스블한 플라스틱 재질의 상부 및 하부 기판(12, 12') 사이에 액정이 주입되어 디스플레이 기능을 수행하는 액정층(14)으로 구성된다.As shown in the liquid crystal display device 11 corresponding to the window W of the upper panel 10, a liquid crystal is injected between the upper and lower substrates 12 and 12 ′ of the flexible plastic material to display a display function. It consists of a liquid crystal layer 14 to perform.

이때, 상기 액정층(14)은 상기 상부 및 하부 기판(12, 12') 사이의 테두리를 따라 프레임형으로 실링 처리를 행하여 상기 상부 및 하부 기판(12, 12')을 접합시키면서 실링 처리한 일측에 액정봉입구(미도시)를 형성한 다음, 액정을 주입하여 봉입함으로써 형성가능하게 된다.In this case, the liquid crystal layer 14 performs sealing in a frame shape along the edge between the upper and lower substrates 12 and 12 'and seals the upper and lower substrates 12 and 12' while bonding the upper and lower substrates 12 and 12 '. After forming a liquid crystal encapsulation hole (not shown) in, it is possible to form by injecting and sealing the liquid crystal.

상기 상부 및 하부 기판(12, 12')은 상기 상부 및 하부 패널(10, 20)과 마찬가지로 얇으면서도 굽힘과 압력 등에 대한 내구성이 우수한 플라스틱 재질로 이루어지도록 하는 것이 바람직하다.The upper and lower substrates 12 and 12 'are preferably made of a plastic material that is thin and has excellent durability against bending and pressure, similar to the upper and lower panels 10 and 20.

상기 하부 기판(12')의 면적은 상부 기판(12)에 비해 다소 넓게 제작되도록 하며, 상기 액정층(14)이 대응되는 부분을 제외한 하부 기판(12') 상에 구동회로 소자(미도시)가 일체로 형성되도록 한다.An area of the lower substrate 12 ′ is made to be somewhat wider than that of the upper substrate 12, and a driving circuit element (not shown) is disposed on the lower substrate 12 ′ except for a portion where the liquid crystal layer 14 corresponds. To be integrally formed.

여기서, 상기 구동회로 소자는 집적회로칩(13)으로부터 신호 정보를 액정층(14) 신호체계에 맞도록 변환하는 역할을 하기 위한 것으로, 상기 역할을 하는 구동회로 소자를 하부 기판(12')에 일체로 형성되도록 한 것이면 어떠한 형태의 것이라도 무방하다 할 것이다.Here, the driving circuit element serves to convert the signal information from the integrated circuit chip 13 to match the liquid crystal layer 14 signal system, and the driving circuit element serving as the driving circuit element is formed on the lower substrate 12 '. Any form may be used as long as it is formed integrally.

그 결과, 액정표시소자와 함께 구동회로 소자, 집적회로칩 및 박막전지 각각의 배치 영역이 필요한 상기 선행기술에 비하여 액정표시소자(11)가 구동회로 소자와 일체로 형성됨으로써, 구동회로 소자가 차지하는 영역만큼 다른 부품의 배치 및 확장 등 효율적인 설계가 가능하게 된다.As a result, the liquid crystal display element 11 is formed integrally with the drive circuit element as compared with the above-mentioned prior art which requires the arrangement area of the drive circuit element, the integrated circuit chip and the thin film battery together with the liquid crystal display element, thereby occupying the drive circuit element. Efficient design, such as the placement and expansion of parts as different as possible, becomes possible.

즉, 상기 액정표시소자(11)의 구동 시간을 늘리기 위하여 박막전지(15)의 면적을 구동회로 소자가 배치되었던 영역만큼 확장되게 설계하는 것도 가능한 등 많은 변형 및 응용이 가능함은 물론이다.In other words, in order to increase the driving time of the liquid crystal display device 11, many modifications and applications are possible, such as the area of the thin film battery 15 may be designed to be extended to the area where the driving circuit element is disposed.

상기 구동회로 소자와 일체로 된 액정표시소자(11)에 인접한 위치에 공지의 집적회로칩(13) 및 박막전지(15)가 위치하게 되며, 상기 액정표시소자(11), 집적회로칩(13) 및 박막전지(15)가 플렉시블 프린트 배선기판(Flexible Printed Circuit Board)(17)으로 상호 연결되어 상부 및 하부 패널(10, 20) 사이에 장착된다.A well-known integrated circuit chip 13 and a thin film battery 15 are positioned at a position adjacent to the liquid crystal display element 11 integrated with the driving circuit element, and the liquid crystal display element 11 and the integrated circuit chip 13 are positioned. ) And the thin film battery 15 are interconnected by a flexible printed circuit board 17 and mounted between the upper and lower panels 10 and 20.

상부 및 하부 패널 사이에 각종 부품이 배치된 회로기판을 장착되도록 하여 스마트 카드의 두께가 증가하게 되는 상기 선행기술에 비하여 본원 발명에 따른 스 마트 카드는 상기 상부 및 하부 패널(10, 20) 사이에 장착되는 회로기판이 필요없게 되므로 스마트 카드의 박형화가 가능하게 되는 것이다.The smart card according to the present invention is provided between the upper and lower panels 10 and 20 as compared with the prior art in which the thickness of the smart card is increased by mounting a circuit board having various components disposed between the upper and lower panels. Since there is no need for a circuit board to be mounted, it is possible to thin the smart card.

상기 상부 패널(10)의 윈도우(W)에 대응되게 상기 액정표시소자(11)가 장착되도록 하면서, 상기 액정표시소자(11)와 플렉시블 프린트 배선기판(17)으로 각각 상호 연결된 집적회로칩(13) 및 박막전지(15)가 상기 상부 패널(10)의 배면에 안착되도록 한 다음, 상부 패널(10)과 일체로 조합되는 하부 패널(20)이 부착되도록 함으로써 본원 발명에 따른 스마트 카드의 제작이 완료되게 된다.The integrated circuit chip 13 interconnected with the liquid crystal display element 11 and the flexible printed wiring board 17 while allowing the liquid crystal display element 11 to be mounted to correspond to the window W of the upper panel 10. ) And the thin film battery 15 to be seated on the rear surface of the upper panel 10, and then to the lower panel 20 which is integrally combined with the upper panel 10 is attached to the production of smart card according to the present invention. Will be completed.

이상에 살펴본 바와 같이, 본 발명에 의하면, 스마트 카드의 내부 구조를 단순화하고 효율적인 부품 배치가 가능하도록 하여 박형화 및 유연성의 향상이 가능하도록 하는 디스플레이 기능을 갖는 스마트 카드를 제공하는 것을 기본적인 기술적 사상으로 하고 있음을 알 수 있다.As described above, according to the present invention, it is a basic technical idea to provide a smart card having a display function for simplifying the internal structure of the smart card and enabling efficient component placement to improve thickness and flexibility. It can be seen that.

그리고, 이와 같은 본 발명의 기본적인 기술적 사상의 범주 내에서, 당업계의 통상의 지식을 가진 자에게 있어서는 다른 많은 변형이 가능함은 물론이다.And within the scope of the basic technical idea of the present invention, of course, many other modifications are possible to those skilled in the art.

본 발명에 의하면 다음과 같은 효과가 기대된다.According to the present invention, the following effects are expected.

우선, 내충격성 및 내구성이 우수하며 플렉시블한 플라스틱 재질의 상부 및 하부 패널, 상부 및 하부 기판을 채택함으로써, 스마트 카드의 사용환경의 특성상 지속적인 기계적 충격에 유연성을 지니며 적극 대응할 수 있게 된다.First of all, by adopting flexible plastic upper and lower panels, upper and lower substrates with excellent impact resistance and durability, it is possible to respond flexibly to continuous mechanical shock due to the characteristics of the smart card's usage environment.

그리고, 액정표시소자를 구성하는 하부 기판 상에 구동회로 소자가 일체로 형성되도록 함으로써 스마트 카드의 내부 구조를 단순화시킴으로써 제조 공정을 간 편하게 되도록 함은 물론 효율적인 생산이 가능하게 된다.In addition, since the driving circuit elements are integrally formed on the lower substrate constituting the liquid crystal display device, the internal structure of the smart card may be simplified, thereby simplifying the manufacturing process and enabling efficient production.

또한, 상부 및 하부 패널에 대응되는 크기의 회로기판 상에 각종 부품이 배치되도록 한 종래의 스마트 카드에 비해 플렉시블 프린트 배선기판으로 각 부품을 상호 연결되도록 하여 상부 및 하부 패널 사이에 장착되도록 함으로써 스마트 카드의 박형화가 구현 가능하게 되는 등 매우 유용한 발명인 것이다.In addition, compared to the conventional smart card in which various components are placed on a circuit board having a size corresponding to the upper and lower panels, the smart card is connected to the upper and lower panels by interconnecting the components with the flexible printed wiring board. It is a very useful invention, such that the thinning of.

Claims (1)

디스플레이 기능을 갖는 스마트 카드에 있어서,In a smart card having a display function, 상기 스마트 카드는,The smart card, 윈도우(W)가 형성되고 플렉시블한 플라스틱 재질의 상부 패널(10)과 상기 상부 패널과 일체로 조합되는 플렉시블한 하부 패널(20)로 구성되고, A window W is formed and consists of a flexible plastic upper panel 10 and a flexible lower panel 20 integrally combined with the upper panel. 상기 상부 및 하부 패널 사이에는 액정표시소자(11), 집적회로칩(13), 구동회로 소자 및 박막전지(15)가 회로연결되어지되,The liquid crystal display device 11, the integrated circuit chip 13, the driving circuit device, and the thin film battery 15 are circuit-connected between the upper and lower panels. 상기 액정표시소자(11)의 상하부 기판(12, 12')은 플렉시블한 플라스틱 재질로 이루어지고, 상기 액정표시소자의 하부기판(12')은 구동회로 소자와 일체로 형성되는 것을 특징으로 하는 디스플레이 기능을 갖는 스마트 카드.The upper and lower substrates 12 and 12 'of the liquid crystal display element 11 are made of a flexible plastic material, and the lower substrate 12' of the liquid crystal display element is integrally formed with a driving circuit element. Smart card with function.
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JPH1011555A (en) 1996-06-25 1998-01-16 Hitachi Ltd Information IC card
EP1341121A1 (en) 2002-02-28 2003-09-03 EASTMAN KODAK COMPANY (a New Jersey corporation) Transaction card with memory and polymer dispersed cholesteric liquid crystal display
JP2005011189A (en) 2003-06-20 2005-01-13 Fuji Xerox Co Ltd Information medium with display function
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JP2005183741A (en) 2003-12-19 2005-07-07 Semiconductor Energy Lab Co Ltd Semiconductor device and its manufacturing method

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JPH1011555A (en) 1996-06-25 1998-01-16 Hitachi Ltd Information IC card
EP1341121A1 (en) 2002-02-28 2003-09-03 EASTMAN KODAK COMPANY (a New Jersey corporation) Transaction card with memory and polymer dispersed cholesteric liquid crystal display
JP2005011189A (en) 2003-06-20 2005-01-13 Fuji Xerox Co Ltd Information medium with display function
JP2005078370A (en) 2003-08-29 2005-03-24 Ngk Spark Plug Co Ltd Ic card with display device and method to use it
JP2005183741A (en) 2003-12-19 2005-07-07 Semiconductor Energy Lab Co Ltd Semiconductor device and its manufacturing method

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