KR20070081902A - Liquid crystal device - Google Patents

Liquid crystal device Download PDF

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Publication number
KR20070081902A
KR20070081902A KR1020060014173A KR20060014173A KR20070081902A KR 20070081902 A KR20070081902 A KR 20070081902A KR 1020060014173 A KR1020060014173 A KR 1020060014173A KR 20060014173 A KR20060014173 A KR 20060014173A KR 20070081902 A KR20070081902 A KR 20070081902A
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South Korea
Prior art keywords
substrate
disposed
liquid crystal
conductive layer
base film
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KR1020060014173A
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Korean (ko)
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진흥석
박진오
박용세
강수명
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삼성전자주식회사
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Priority to KR1020060014173A priority Critical patent/KR20070081902A/en
Publication of KR20070081902A publication Critical patent/KR20070081902A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/13338—Input devices, e.g. touch panels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1345—Conductors connecting electrodes to cell terminals
    • G02F1/13452—Conductors connecting driver circuitry and terminals of panels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Abstract

An LCD(Liquid Crystal Display) is provided to improve durability of an LCD to which a touch panel is attached by preventing a crack generated in a bonding portion where the substrate and a flexible printed circuit board are connected. An LCD panel displays an image. A touch panel includes a first substrate(31) formed at a front surface of the LCD panel, a second substrate(34) facing the first substrate, and a first transparent electrode(32) and a second transparent electrode(35) disposed on the first substrate and the second substrate. A flexible circuit board includes conducive layers(122a,122b) disposed in at least the portions of front and back surfaces of a base film(120) and electrically connected through a via hole(123), a passivation layer(125) disposed on the conductive layer and having at least portion overlapping the second transparent electrode, a first conductive adhesive agent(124a) disposed between the second transparent electrode and the conductive layer and having one surface contacting one side of the passivation layer, and a second conductive adhesive agent(124b) contacting a back surface of the conductive layer disposed at the back surface of the base film, one surface of the conductive layer disposed at the back surface of the base film, and one portion of the base film.

Description

액정 표시 장치{Liquid crystal device}Liquid crystal display device

도 1은 일반적인 터치패널을 포함하는 액정 표시 장치를 설명하기 위한 도면이다.1 is a view for explaining a liquid crystal display including a general touch panel.

도 2 및 도 3은 본 발명의 일 실시예에 따른 터치 패널의 구성도이다.2 and 3 is a block diagram of a touch panel according to an embodiment of the present invention.

도 4는 본 발명의 일 실시예에 따른 터치 패널과 FPC의 연결 상태를 나타내는 도면이다.4 is a diagram illustrating a connection state between a touch panel and an FPC according to an embodiment of the present invention.

도 5는 본 발명의 일 실시예에 따른 터치 패널과 FPC의 연결 상태를 나타내는 단면도이다.5 is a cross-sectional view illustrating a connection state between a touch panel and an FPC according to an embodiment of the present invention.

(도면의 주요부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)

20: 액정 표시 패널 30: 터치 패널20: liquid crystal display panel 30: touch panel

31: 제1 기판 32: 제1 투명 전극31: first substrate 32: first transparent electrode

33: 도트 스페이서 34: 제2 기판33: dot spacer 34: second substrate

35: 제2 투명 전극 60a, 60b: Y축 전극35: second transparent electrode 60a, 60b: Y-axis electrode

70a, 70b: X축 전극 80: FPC70a, 70b: X-axis electrode 80: FPC

81: 신호 접합부 82:FPC 접합부81: signal junction 82: FPC junction

83: X축 전극 접합부 84: 제1 패턴83: X-axis electrode bonding portion 84: the first pattern

85: 제2 패턴 86: Y축 전극 접합부85: second pattern 86: Y-axis electrode junction

87: 제3 패턴 88: 제4 패턴87: third pattern 88: fourth pattern

89: 제5 패턴 90: 제6 패턴89: fifth pattern 90: sixth pattern

101, 103: X축 전극 104, 106: Y축 전극101, 103: X-axis electrode 104, 106: Y-axis electrode

120: 베이스 필름 121: 접착층120: base film 121: adhesive layer

122a, 122b: 도전층 123: 비아홀122a and 122b: conductive layer 123: via hole

124a: 제1 도전성 접착제 124b: 제2 도전성 접착제124a: first conductive adhesive 124b: second conductive adhesive

125: 보호층125: protective layer

본 발명은 액정 표시 장치에 관한 것으로, 보다 상세하게는 터치 패널과 연성회로기판의 접합부에서 발생하는 크랙을 방지할 수 있는 액정 표시 장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing cracks generated at a junction between a touch panel and a flexible circuit board.

일반적으로, 액정 표시 장치(Liquid Crystal Display)는 두 기판 사이에 주입되어 있는 이방성 유전율을 갖는 액정 물질에 전계를 인가하고, 이 전계의 세기를 조절하여 기판에 투과되는 빛의 양을 조절함으로써, 원하는 화상 신호를 디스플레이하는 표시 장치이다.In general, a liquid crystal display applies an electric field to a liquid crystal material having an anisotropic dielectric constant injected between two substrates, and adjusts the intensity of the electric field to adjust the amount of light transmitted through the substrate, A display device that displays an image signal.

한편, 액정 표시 장치에 터치 스크린 기능을 부가하기 위해서 액정 패널의 표면에 별도의 터치 패널(Touch Panel)을 배치하였다. 터치 패널은 입력 수단으로 많이 이용되는데, 이는 사용자의 입력 조작을 좌표값으로 읽어 정보를 입력하는 장 치이다.Meanwhile, in order to add a touch screen function to the liquid crystal display, a separate touch panel is disposed on the surface of the liquid crystal panel. The touch panel is widely used as an input means, and is a device for inputting information by reading a user's input operation as a coordinate value.

터치 패널의 작동 방식에는 크게 접촉식 정전용량 방식과, 압력식 저항막 방식과, 적외선 감지 방식과, 적분식 장력측정 방식과, 표면 초음파 전도 방식 및 피에조 효과 방식이 있는데, 압력식 저항막 방식의 터치 패널에 대해 간단하게 살펴본다.The touch panel is mainly operated by the contact capacitive method, the pressure resistive film method, the infrared sensing method, the integral tension measurement method, the surface ultrasonic conduction method and the piezo effect method. Let's take a quick look at the touch panel.

압력식 저항막 방식의 터치 패널은 투명한 2개의 기판 상에 저항 성분을 갖는 투명 전극을 일정한 간격만큼 이격되어 마주보도록 각각 형성한다. 투명 전극에 전류를 흘려주면 저항 성분에 의해 각각의 투명 전극에 전압이 걸리게 되고, 손으로 접촉하게 되면, 두 투명 전극이 접촉하게 된다. 따라서, 두 투명 전극의 저항 성분 때문에 저항의 병렬 접속과 같은 형태가 되고, 저항 값의 변화가 일어나게 된다. 이때, 두 투명 전극에 흐르는 전류에 의하여 전압의 변화가 일어나게 되는데 이러한 전압의 변화에 의해 접촉된 위치를 알 수 있는 방식이다.The pressure resistive touch panel is formed on two transparent substrates so as to face transparent electrodes having resistance components spaced apart by a predetermined interval. When a current is applied to the transparent electrode, a voltage is applied to each transparent electrode by the resistive component, and when the contact is made by hand, the two transparent electrodes come into contact with each other. Therefore, the resistance component of the two transparent electrodes leads to the same form as the parallel connection of the resistors, resulting in a change in the resistance value. At this time, a change in voltage occurs due to the current flowing through the two transparent electrodes, which is a method of knowing a contact position by the change of the voltage.

또한, 터치 패널은 고객의 제품 특성 및 구조에 따라 터치 패널의 입력 패드(Input Pad) 즉, 연성회로기판(Flexible Printed Circuit ; 이하, FPC라 함)을 상하 또는 좌우로 배치할 수 있으며, 보통 FPC를 상하로 배치하고 있다. 터치 패널의 FPC를 상하로 배치하는 경우에는 FPC가 액정 표시 장치의 모듈과 여유 공간을 가지고 부착되므로 굴곡성에 대해 큰 영향을 받지 않는다. In addition, the touch panel may arrange an input pad of the touch panel, ie, a flexible printed circuit (FPC), vertically or horizontally according to a customer's product characteristics and structure. Is placed up and down. When the FPCs of the touch panel are disposed up and down, the FPCs are attached to the modules of the liquid crystal display with a free space so that the FPCs are not significantly affected by the flexibility.

그러나, 터치 패널의 좌측에 FPC를 배치하는 경우, 액정 표시 장치의 모듈 구조상 좌우측의 부착 공간이 협소하기 때문에 터치 패널의 FPC가 굴곡성에 취약하게 된다. 그리고, FPC가 굴곡되는 부분에는 보호층 하부에 도전층이 형성되어 있어 입력 패드와 액정 표시 장치를 연결시킴에 있어서 수차례 펴졌다 굽혀졌다를 반복하게 되고, 이로 인해 도전층의 일부분에 크랙(Crack)이 발생하게 된다.However, in the case where the FPC is disposed on the left side of the touch panel, the FPC of the touch panel is vulnerable to flexibility because the mounting spaces on the left and right sides are narrow due to the module structure of the liquid crystal display device. In addition, the conductive layer is formed under the protective layer at the portion where the FPC is bent, so that the conductive pad is stretched and bent several times in connection with the input pad and the liquid crystal display device, thereby causing cracks in a portion of the conductive layer. ) Will occur.

본 발명이 이루고자 하는 기술적 과제는, 터치 패널과 연성회로기판의 접합부에서 발생하는 크랙을 방지할 수 있는 액정 표시 장치를 제공하고자 하는 것이다.SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display device capable of preventing cracks generated at a junction between a touch panel and a flexible circuit board.

본 발명의 기술적 과제들은 이상에서 언급한 기술적 과제들로 제한되지 않으며, 언급되지 않은 또 다른 기술적 과제들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The technical problems of the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

상기 기술적 과제를 달성하기 위한 본 발명의 일 실시예에 따른 액정 표시 장치는, 영상을 디스플레이하는 액정 표시 패널, 상기 액정 표시 패널의 전면에 형성된 제1 기판, 상기 제1 기판과 대향 배치되는 제2 기판, 상기 제1 및 제2 기판 상에 배치된 제1 및 제2 투명 전극을 포함하는 터치 패널 및 베이스 필름의 전면과 후면의 적어도 일부분에 배치되며 비아홀을 통해 전기적으로 연결되는 도전층, 상기 도전층 상면에 배치되며 적어도 일부가 상기 제2 투명 전극과 중첩되도록 배치된 보호층, 상기 제2 투명 전극과 상기 도전층 사이에 배치되며 일측면은 보호층의 일측면과 접촉하는 제1 도전성 접착제 및 상기 제1 투명 전극, 베이스 필름의 후면에 배치된 도전층의 후면, 베이스 필름의 후면에 배치된 도전층의 일측면 및 상기 베이스 필름의 일부분과 접촉하는 제2 도전성 접착제를 포함하는 연성회로기판을 포함한다.According to an aspect of the present invention, a liquid crystal display panel for displaying an image, a first substrate formed on a front surface of the liquid crystal display panel, and a second substrate disposed to face the first substrate. A conductive layer disposed on at least a portion of a front surface and a rear surface of a base panel, a touch panel including first and second transparent electrodes disposed on the first and second substrates, and electrically connected through via holes; A protective layer disposed on an upper surface of the layer and at least partially overlapping the second transparent electrode, a first conductive adhesive disposed between the second transparent electrode and the conductive layer, and one side of which is in contact with one side of the protective layer; The first transparent electrode, a rear surface of the conductive layer disposed on the rear surface of the base film, one side surface of the conductive layer disposed on the rear surface of the base film, and a part of the base film And a flexible circuit board comprising a moist second conductive adhesive.

기타 실시예들의 구체적인 사항들은 상세한 설명 및 도면들에 포함되어 있다. Specific details of other embodiments are included in the detailed description and the drawings.

본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 수 있을 것이며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하고 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것으로, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. 명세서 전체에 걸쳐 동일 참조 부호는 동일 구성 요소를 지칭한다.Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms, and the present embodiments are merely provided to make the disclosure of the present invention complete and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

이하, 첨부된 도면을 참조하여 본 발명의 실시예들을 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention;

도 1은 일반적인 터치 패널을 포함하는 액정 표시 장치를 설명하기 위한 도면이다.1 is a view for explaining a liquid crystal display including a general touch panel.

도 1을 참조하면, 터치패널 액정 표시 장치는(10)는 액정 표시 장치와, 액정 표시 장치에 구비되는 액정 표시 패널(20) 상에 배치된 터치 패널(30)로 이루어진다. 여기에서, 액정 표시 패널(20)은 접착제(36)에 의해 터치 패널(30)과 서로 부착된다.Referring to FIG. 1, the touch panel liquid crystal display 10 includes a liquid crystal display and a touch panel 30 disposed on the liquid crystal display panel 20 included in the liquid crystal display. Here, the liquid crystal display panel 20 is attached to the touch panel 30 by an adhesive 36.

액정 표시 패널(20)은 박막 트랜지스터(미도시)가 구비된 제1 표시판(21)과, 제1 표시판(21)과 대향 배치되며 박막 트랜지스터(미도시)가 구비된 면과 마주보는 면에 컬러 필터(미도시)가 구비된 제2 표시판(23)과 이들 사이에 개재된 액정(25) 으로 이루어진다.The liquid crystal display panel 20 includes a first display panel 21 having a thin film transistor (not shown) and a color disposed on a surface of the liquid crystal display panel facing the first display panel 21 and facing the surface on which the thin film transistor (not shown) is provided. A second display panel 23 provided with a filter (not shown) and a liquid crystal 25 interposed therebetween.

또한, 액정 표시 패널(20)에는 백라이트 어셈블리(미도시)로부터 액정 표시 패널(20)로 입사되는 광을 선편광으로 변환시키는 제1 편광판(26)이 제1 표시판(21)의 박막 트랜지스터가 형성된 면의 반대편 면에 구비되고, 이에 대응하는 제2 편광판(27)이 제2 표시판(23)의 컬러 필터가 형성된 면의 반대편 면에 구비된다.In addition, the liquid crystal display panel 20 includes a first polarizing plate 26 for converting light incident from the backlight assembly (not shown) into the liquid crystal display panel 20 into linearly polarized light, on which a thin film transistor of the first display panel 21 is formed. The second polarizing plate 27 is provided on the opposite side of the substrate, and the second polarizing plate 27 is provided on the opposite side of the surface on which the color filter of the second display panel 23 is formed.

터치 패널(30)은 액정 표시 패널(20)의 제2 편광판(27) 상에 구비되는 제1 기판(31)과, 제1 기판(31)과 소정의 간격만큼 이격되어 구비되는 제2 기판(34)과, 제1 및 제2 기판(31, 34)의 마주보는 각각의 면에 형성되는 제1 및 제2 투명 전극(32, 35)으로 이루어진다.The touch panel 30 may include a first substrate 31 provided on the second polarizing plate 27 of the liquid crystal display panel 20, and a second substrate spaced apart from the first substrate 31 by a predetermined distance ( 34 and first and second transparent electrodes 32 and 35 formed on respective surfaces of the first and second substrates 31 and 34.

제1 투명 전극(32) 상에는 제1 및 제2 투명 전극(32, 35)간의 간격보다 작은 높이를 갖는 다수 개의 도트 스페이서(33)가 형성되어 있다.A plurality of dot spacers 33 having a height smaller than the distance between the first and second transparent electrodes 32 and 35 are formed on the first transparent electrode 32.

터치 패널(30)의 제1 기판(31)은 액정 표시 패널(30)로부터 제공되는 소정이 화상이 투과될 수 있도록 투명한 재질로 이루어지고, 제2 기판(34)은 터치 패널로 작용할 수 있도록 유연한 필름 예를 들면, 폴리에틸렌테레프탈산(PET), 폴리카보네이트 등의 광학적 등방성의 굴절율을 갖는 물질로 이루어진 특수 광학 필름을 사용한다. The first substrate 31 of the touch panel 30 is made of a transparent material such that a predetermined image provided from the liquid crystal display panel 30 can transmit an image, and the second substrate 34 is flexible to act as a touch panel. Film For example, a special optical film made of a material having an optically isotropic refractive index such as polyethylene terephthalic acid (PET) or polycarbonate is used.

도 2 및 도 3은 본 발명의 일 실시예에 따른 터치 패널의 구성도이다.2 and 3 is a block diagram of a touch panel according to an embodiment of the present invention.

도 2 및 도 3을 참조하면, 4개의 버스 라인을 갖는 압력식 저항막 방식의 터치 패널로서, 제1 기판(31)과 제2 기판(34) 및 제1 및 제2 기판(31, 34) 사이에는 절연막(insulator)이 형성되어 있다.2 and 3, a pressure resistive touch panel having four bus lines includes a first substrate 31, a second substrate 34, and first and second substrates 31 and 34. Insulators are formed therebetween.

도 2와 같이, 제1 기판(31)은 제1 투명 전극(32) 양측에 Y축 방향의 Y축 전극(60a, 60b)과 X축 방향의 액티브 영역(a1)에 2개의 버스 라인이 배열되어 있다. 또한, 제2 기판(34)은 도 3과 같이, 제2 투명 전극(35) 위에 X축 방향의 X축 전극(70a, 70b)과 Y축 방향의 액티브 영역(a2)에 2개의 버스 라인이 배열되어 있다. 이때, Y축 전극(60a, 60b)및 X축 전극(70a, 70b)은 저저항 메탈로, 액티브 영역(a1, a2)은 고저항 메탈로 이루어져 있다. As shown in FIG. 2, two bus lines are arranged on the Y-axis electrodes 60a and 60b in the Y-axis direction and the active region a1 in the X-axis direction on both sides of the first transparent electrode 32. It is. In addition, as illustrated in FIG. 3, two bus lines are disposed on the second transparent electrode 35 in the X-axis electrodes 70a and 70b in the X-axis direction and in the active region a2 in the Y-axis direction. Are arranged. At this time, the Y-axis electrodes 60a and 60b and the X-axis electrodes 70a and 70b are made of low resistance metal, and the active regions a1 and a2 are made of high resistance metal.

그리고, Y축 좌표를 감지하기 위한 제1 기판(31)과 X축 좌표를 감지하기 위한 제2 기판(34)이 마주보도록 합착한다.Then, the first substrate 31 for sensing the Y-axis coordinates and the second substrate 34 for sensing the X-axis coordinates are bonded to face each other.

제1 기판(31)에는 외부로부터 터치 패널(30)에 신호를 인가하기 위해 FPC(80)가 접속되며, FPC(80)와 연결하기 위한 FPC 접합부(Contact)(82)가 형성된다.An FPC 80 is connected to the first substrate 31 to apply a signal to the touch panel 30 from the outside, and an FPC contact 82 for connecting to the FPC 80 is formed.

제1 기판(31)의 FPC 접합부(82)는 Y축 전극(60a)에서 임의의 길이(L1)만큼 돌출된 제1 패턴(84)과, Y축 전극(60b)으로부터 연장되어 액티브 영역(a1)을 따라 형성된 제2 패턴(85)으로 이루어지는 Y축 전극 접합부(86)를 가진다. 여기에서, Y축 전극 접합부(86)는 제1 및 제2 기판(31, 34)이 합착될 때 제2 기판(34)의 X축 전극 접합부(83)의 제3 및 제4 패턴(87, 88)과 접촉되지 않도록 한다.The FPC junction 82 of the first substrate 31 extends from the first pattern 84 protruding from the Y-axis electrode 60a by an arbitrary length L1 and the Y-axis electrode 60b to extend the active region a1. Has a Y-axis electrode junction portion 86 formed of a second pattern 85 formed along the. Here, the Y-axis electrode junction 86 may include the third and fourth patterns 87, of the X-axis electrode junction 83 of the second substrate 34 when the first and second substrates 31 and 34 are bonded to each other. 88) Avoid contact with

따라서, 각 패턴(84, 85, 87, 88)은 제1 기판(31)의 절연막(41) 상에서 임의의 길이로 서로 Y축 전극 접합부(86)와 신호 접합부(81)의 패턴을 2개씩 공유하는 FPC 접합부(82)를 형성한다.Therefore, each of the patterns 84, 85, 87, and 88 share two patterns of the Y-axis electrode junction 86 and the signal junction 81 with each other at arbitrary lengths on the insulating film 41 of the first substrate 31, respectively. The FPC junction 82 is formed.

제2 기판(34)의 X축 전극 접합부(83)는 각각의 X축 전극(70a, 70b)의 끝에서 가운데 방향으로 모여져 임의의 길이(L2)로 돌출된 제5 및 제6 패턴(89, 90)을 갖는다.The X-axis electrode junctions 83 of the second substrate 34 are collected in the center direction at the ends of the respective X-axis electrodes 70a and 70b and protrude to the arbitrary length L2. 90).

제1 및 제2 기판(31, 34)의 각 접합부(82, 83)가 만드는 접촉점은 제1 기판(31)과 제2 기판(34)의 합착 공정을 통해 살펴보면, 제1 기판(31) 상에 제2 기판(34)을 합착하면, 제1 기판(31)의 제3 패턴(87)에는 제2 기판(34)의 제5 패턴(89)이 접촉되고, 제1 기판(31)의 제4 패턴(88)에는 제2 기판(34)의 제6 패턴(90)이 접촉된다. 그러므로, 제1 및 제2 기판(31, 34)의 X축 및 Y축 전극 접합부(83, 86)가 한 곳에 모여지게 되고, X축 및 Y축 전극 접합부(83, 86)는 FPC(80)와 연결된다. The contact points made by the junctions 82 and 83 of the first and second substrates 31 and 34 are examined through the bonding process of the first substrate 31 and the second substrate 34. When the second substrate 34 is bonded to the second substrate 34, the fifth pattern 89 of the second substrate 34 is in contact with the third pattern 87 of the first substrate 31, and the first substrate 31 is formed. The sixth pattern 90 of the second substrate 34 is in contact with the fourth pattern 88. Therefore, the X and Y axis electrode junctions 83 and 86 of the first and second substrates 31 and 34 are gathered in one place, and the X and Y axis electrode junctions 83 and 86 are connected to the FPC 80. Connected with

위와 같은 구조에서 Y축 좌표를 검출하기 위해 제1 기판(31)에 Y축 전극 접합부(86)를 통해 전위를 인가하면 제1 투명 전극(32)에 전위가 분포된다.In the above structure, when the potential is applied to the first substrate 31 through the Y-axis electrode junction 86 to detect the Y-axis coordinate, the potential is distributed on the first transparent electrode 32.

그리고, 손 또는 펜을 이용하여 터치 패널(30)에 압력을 가해 제1 기판(31)과 제2 기판(34)이 접촉되었을 때 그 점에서의 전위가 제1 기판(31)에 전달되고, Y축 전극 접합부(86)를 통해 신호를 읽어들여 X 좌표를 계산한다. 이렇게 제1 기판(31)과 제2 기판(34)이 접촉되고 있는 동안에 제2 기판(34)에 X축 좌표를 검출하기 위한 전위를 인가하면 제2 투명 전극(35)에 전위가 분포된다. 마찬가지로, 손 또는 펜이 접촉한 점에서의 X축 전위가 제2 기판(34)에 전달되고, X축 전극 접합부(83)를 통해 신호를 읽어들여 X 좌표를 계산한다.When the first substrate 31 and the second substrate 34 are in contact with each other by applying pressure to the touch panel 30 using a hand or a pen, a potential at the point is transferred to the first substrate 31, The X coordinate is calculated by reading the signal through the Y-axis electrode junction 86. When the potential for detecting the X-axis coordinate is applied to the second substrate 34 while the first substrate 31 and the second substrate 34 are in contact with each other, the potential is distributed on the second transparent electrode 35. Similarly, the X-axis potential at the point where the hand or pen is in contact is transferred to the second substrate 34, and the X coordinate is read by reading the signal through the X-axis electrode junction 83.

도 4는 본 발명의 일 실시예에 따른 터치 패널과 FPC의 연결 상태를 나타내는 도면이다.4 is a diagram illustrating a connection state between a touch panel and an FPC according to an embodiment of the present invention.

도 4를 참조하면, 터치 패널(30)은 Y축 좌표를 감지하기 위한 제1 기판(31) 과 X축 좌표를 감지하기 위한 제2 기판(34)이 합착된다. 제1 기판(31)의 Y축 일측면에 Y+ 전극 및 Y- 전극이 나란히 배치되고, 제2 기판(34)의 Y축 일측면에 X+ 전극 및 X- 전극이 나란히 배치된다. 제1 및 제2 기판(31, 34)를 합착하면, 제1 기판(31)에 배치된 Y+ 전극 및 Y- 전극과 제2 기판(34)의 Y축 일측면에 X+ 전극 및 X- 전극가 집합되어 FPC 접합부(82)를 형성한다. 터치 패널(30)의 FPC 접합부(82)에 X축 및 Y축 전극들이 X+ 전극, Y+ 전극, X- 전극 및 Y- 전극이 차례로 배치된다. X축 전극(101, 103)및 Y축 전극(104, 106)에 전기적 신호를 전달하는 FPC(80)가 터치 패널(30)의 FPC 접합부(82)에 접속된다.Referring to FIG. 4, in the touch panel 30, a first substrate 31 for sensing Y-axis coordinates and a second substrate 34 for sensing X-axis coordinates are bonded to each other. The Y + electrode and the Y− electrode are arranged side by side on one side of the Y axis of the first substrate 31, and the X + electrode and the X− electrode are arranged side by side on the Y axis side of the second substrate 34. When the first and second substrates 31 and 34 are bonded to each other, the Y + electrode and the Y− electrode disposed on the first substrate 31 and the X + electrode and the X− electrode are collected on one side of the Y axis of the second substrate 34. To form the FPC junction 82. In the FPC junction 82 of the touch panel 30, X-axis and Y-axis electrodes are disposed in order of an X + electrode, a Y + electrode, an X− electrode, and a Y− electrode. An FPC 80 that transmits electrical signals to the X-axis electrodes 101 and 103 and the Y-axis electrodes 104 and 106 is connected to the FPC junction 82 of the touch panel 30.

도 5는 본 발명의 일 실시예에 따른 터치 패널과 FPC의 연결 상태를 나타내는 단면도이다.5 is a cross-sectional view illustrating a connection state between a touch panel and an FPC according to an embodiment of the present invention.

도 5를 참조하면, FPC(80)는 제1 및 제2 도전성 접착제(124a, 124b)에 의해 터치 패널(30)의 제1 및 제2 투명 전극(32, 35)과 부착되어 있다. FPC(80)는 베이스 필름(120)의 전면과 후면의 적어도 일부분에 배치되며, 비아홀(123)을 통해 전기적으로 연결되는 도전층(122a, 122b)과 도전층(122a) 상면에 배치되며 적어도 일부가 제2 투명 전극(35)과 중첩되도록 배치된 보호층(125)을 포함한다. 여기에서, 베이스 필름(120)은 도전층(122a, 122b)을 지지하는 역할을 하며, 보호층(125)은 도전층(122a)이 외부의 충격으로부터 손상되거나 부식되는 것을 방지하는 역할을 한다. 이때, 도전층(122a, 122b)은 구리와 같은 금속으로 형성되고, 보호층(125)은 폴리이미드(polyimide)등으로 형성할 수 있다.Referring to FIG. 5, the FPC 80 is attached to the first and second transparent electrodes 32 and 35 of the touch panel 30 by the first and second conductive adhesives 124a and 124b. The FPC 80 is disposed on at least a portion of the front and rear surfaces of the base film 120, and is disposed on the top surfaces of the conductive layers 122a and 122b and the conductive layer 122a that are electrically connected through the via holes 123. Includes a protective layer 125 disposed to overlap the second transparent electrode 35. Here, the base film 120 serves to support the conductive layers 122a and 122b, and the protective layer 125 serves to prevent the conductive layer 122a from being damaged or corroded from an external impact. In this case, the conductive layers 122a and 122b may be formed of a metal such as copper, and the protective layer 125 may be formed of polyimide or the like.

또한, 제1 도전성 접착제(124a)는 제2 투명 전극(35)과 도전층(122a) 사이에 배치되며, 제1 도전성 접착제(124a)의 일측면은 보호층(125)의 일측면과 접촉된다. 제2 도전성 접착제(124b)는 제1 투명 전극(32), 베이스 필름(120)의 후면에 배치된 도전층(122b)의 후면, 베이스 필름(120)의 후면에 배치된 도전층(122b)의 일측면 및 베이스 필름(120)의 일부분과 접촉된다. 이때, 제2 도전성 접착제(124b)는 ㄴ자 형태를 갖는다.In addition, the first conductive adhesive 124a is disposed between the second transparent electrode 35 and the conductive layer 122a, and one side of the first conductive adhesive 124a is in contact with one side of the protective layer 125. . The second conductive adhesive 124b is formed of the first transparent electrode 32, the rear surface of the conductive layer 122b disposed on the rear surface of the base film 120, and the conductive layer 122b disposed on the rear surface of the base film 120. One side and a portion of the base film 120 is in contact. At this time, the second conductive adhesive 124b has a C shape.

표 1은 본 발명의 일 실시예에 따른 터치 패널의 굴곡성 테스트 결과를 나타낸다.Table 1 shows the flexural test results of the touch panel according to the exemplary embodiment of the present invention.

시료수sample water 테스트 전Before the test 테스트 후after the test 결과 result X-RX-R Y-RY-R X-RX-R Y-RY-R 1One 276.3276.3 573.1573.1 276.6276.6 573.2573.2 패스pass 22 313.3313.3 571.9571.9 313.7313.7 572.0572.0 패스pass 3 3 293.4293.4 565.3565.3 293.8293.8 565.5565.5 패스pass 44 314.8314.8 559.0559.0 313.7313.7 558.8558.8 패스pass 55 316.7316.7 566.8566.8 316.8316.8 567.1567.1 패스pass 66 311.3311.3 568.8568.8 311.4311.4 569.0569.0 패스pass 77 314.0314.0 568.1568.1 314.4314.4 567.6567.6 패스pass 88 307.9307.9 561.3561.3 3.8.23.8.2 561.6561.6 패스pass 99 275.5275.5 563.7563.7 276.2276.2 564.1564.1 패스pass 1010 303.0303.0 563.6563.6 303.7303.7 563.9563.9 패스pass

도 5와 같이, 도전층 상면에 배치되는 보호층의 일부가 제2 투명 전극과 중첩되도록 배치하고, 제1 투명 전극, 베이스 필름의 하부에 배치된 도전층의 후면, 베이스 필름의 후면에 배치된 도전층의 일측면 및 상기 베이스 필름의 일부분이 제2 도전성 접착제와 접촉하도록 배치한 후에 50회의 굴곡성 테스트를 한 결과, 터치 패널에 형성된 기판과 FPC가 연결되는 접합부에서 발생하는 크랙이 발생하지 않음을 알 수 있다.As shown in FIG. 5, a portion of the protective layer disposed on the upper surface of the conductive layer is disposed to overlap the second transparent electrode, and the first transparent electrode is disposed on the rear surface of the conductive layer disposed below the base film and the rear surface of the base film. 50 flexural tests were performed after arranging one side of the conductive layer and a portion of the base film in contact with the second conductive adhesive, and as a result, cracks generated at the junction between the substrate formed on the touch panel and the FPC did not occur. Able to know.

또한, 본 발명에서는 도전층의 두께를 두껍게 형성함으로써 구리막에 대한 저항을 줄이고, 도전층의 두께가 얇아 단선이 발생하는 것을 방지할 수 있다.In addition, in the present invention, the thickness of the conductive layer is increased to reduce the resistance to the copper film, and the thickness of the conductive layer is thin, thereby preventing the occurrence of disconnection.

이상 첨부된 도면을 참조하여 본 발명의 실시예를 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명이 그 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해되어야만 한다.Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive.

상기한 바와 같은 본 발명에 따른 터치 패널 액정 표시 장치에 의하면, 터치 패널에 형성된 기판과 FPC가 연결되는 접합부에서 발생하는 크랙을 방지할 수 있다. 따라서, 터치 패널이 부착되는 액정 표시 장치의 내구성을 향상시킬 수 있다.According to the touch panel liquid crystal display device according to the present invention as described above, it is possible to prevent cracks generated at the junction portion between the substrate formed on the touch panel and the FPC. Therefore, durability of the liquid crystal display device to which the touch panel is attached can be improved.

Claims (4)

영상을 디스플레이하는 액정 표시 패널;A liquid crystal display panel displaying an image; 상기 액정 표시 패널의 전면에 형성된 제1 기판, 상기 제1 기판과 대향 배치되는 제2 기판, 상기 제1 및 제2 기판 상에 배치된 제1 및 제2 투명 전극을 포함하는 터치 패널; 및A touch panel including a first substrate formed on an entire surface of the liquid crystal display panel, a second substrate disposed to face the first substrate, and first and second transparent electrodes disposed on the first and second substrates; And 베이스 필름의 전면과 후면의 적어도 일부분에 배치되며 비아홀을 통해 전기적으로 연결되는 도전층, 상기 도전층 상면에 배치되며 적어도 일부가 상기 제2 투명 전극과 중첩되도록 배치된 보호층, 상기 제2 투명 전극과 상기 도전층 사이에 배치되며 일측면은 보호층의 일측면과 접촉하는 제1 도전성 접착제 및 상기 제1 투명 전극, 베이스 필름의 후면에 배치된 도전층의 후면, 베이스 필름의 후면에 배치된 도전층의 일측면 및 상기 베이스 필름의 일부분과 접촉하는 제2 도전성 접착제를 포함하는 연성회로기판을 포함하는 액정 표시 장치.A conductive layer disposed on at least a portion of a front surface and a rear surface of the base film and electrically connected through a via hole, a protective layer disposed on an upper surface of the conductive layer and at least a portion of which is overlapped with the second transparent electrode; And a conductive layer disposed between the conductive layer and one side of the conductive layer disposed on the rear surface of the first conductive adhesive and the first transparent electrode and the base film and the rear surface of the base film. And a flexible printed circuit board comprising one side of the layer and a second conductive adhesive contacting a portion of the base film. 제 1 항에 있어서,The method of claim 1, 상기 베이스 필름과 상기 도전층 사이에 배치된 접착층을 포함하는 액정 표시 장치.And an adhesive layer disposed between the base film and the conductive layer. 제 1 항에 있어서,The method of claim 1, 상기 제2 도전성 접착층은 ㄴ자 형태인 액정 표시 장치.The second conductive adhesive layer is a L-shaped liquid crystal display device. 제 1 항에 있어서,The method of claim 1, 상기 액정 표시 패널의 전면은 편광판인 액정 표시 장치.A liquid crystal display device wherein the front surface of the liquid crystal display panel is a polarizing plate.
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