KR19980077877A - Liquid crystal display having a wide viewing angle and manufacturing method thereof - Google Patents

Liquid crystal display having a wide viewing angle and manufacturing method thereof Download PDF

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Publication number
KR19980077877A
KR19980077877A KR1019970015199A KR19970015199A KR19980077877A KR 19980077877 A KR19980077877 A KR 19980077877A KR 1019970015199 A KR1019970015199 A KR 1019970015199A KR 19970015199 A KR19970015199 A KR 19970015199A KR 19980077877 A KR19980077877 A KR 19980077877A
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South Korea
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liquid crystal
crystal display
substrate
film
display device
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KR1019970015199A
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Korean (ko)
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KR100309211B1 (en
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구동효
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구자홍
엘지전자 주식회사
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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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • 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
    • G02F1/1343—Electrodes
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
    • G02F2201/123—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode pixel

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

본 발명은 광시야각을 갖는 액정표시장치의 제조방법 및 그 구조에 관련된 것으로써, 액정표시장치의 화면의 측면에서도 화면의 내용을 선명하게 인식할 수 있도록 하는데 목적이 있다.The present invention relates to a manufacturing method and a structure of a liquid crystal display device having a wide viewing angle, and an object thereof is to enable the contents of the screen to be clearly recognized even from the side of the screen of the liquid crystal display device.

본 발명의 액정표시장치의 제조방법은 복수개의 화소전극 125 등이 형성된 투명기판 110과, 복수개의 칼라필터 136 등이 형성된 투명기판 120을 대응하도록 배치하고, 액정 140을 주입하고 봉합한다.In the manufacturing method of the liquid crystal display of the present invention, the transparent substrate 110 having the plurality of pixel electrodes 125 and the like and the transparent substrate 120 having the plurality of color filters 136 and the like are disposed to correspond, and the liquid crystal 140 is injected and sealed.

상기 투명기판 120의 이면에 막 150을 형성한다.A film 150 is formed on the rear surface of the transparent substrate 120.

상기 각각의 갈라필터 136과 대응하는 영역 내의 상기 막 150에 상기 칼라필터의 면적보다 작고, 중심축은 상기 칼라필터의 중심축과 대략 일치하는 개구부 190을 형성한다.The film 150 in the region corresponding to each of the gala filters 136 forms an opening 190 smaller than the area of the color filter, with a central axis approximately coinciding with the central axis of the color filter.

상기 막 150의 개구부 190를 마스크로 하고, 상기 투명기판 120의 이면부에 HF액을 주입하여 렌즈를 형성한다.A lens is formed by injecting HF liquid into the back surface of the transparent substrate 120 using the opening 190 of the film 150 as a mask.

Description

광시야각을 갖는 액정표시장치 및 그 제조방법Liquid crystal display having a wide viewing angle and manufacturing method thereof

본 발명은 퍼스널컴퓨터, AV(audio visual), 모빌컴퓨터(mobile computer) 등의 휴대형 정보통신기기, 게임기나 시뮬레이션기기 등에 이용되는 액정표시장치에 관련된 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid crystal display devices used in portable information communication devices such as personal computers, audio visual (AV), mobile computers, game machines, simulation devices, and the like.

특히, 마이크로렌즈를 액정표시장치의 한 기판에 형성하여 넓은 시야각을 갖는 액정표시장치를 구성하는 것에 관련된 것이다.In particular, it relates to forming a liquid crystal display device having a wide viewing angle by forming microlenses on one substrate of the liquid crystal display device.

종래의 액정표시장치는 도 1과 같이 투명기판 20의 한 면에 블랙매트릭스 35, 칼라필터 36이 구성되고, 상기 칼라필터와 블랙매트릭스 위에 공통전극 31이 구성된다.In the conventional LCD, a black matrix 35 and a color filter 36 are formed on one surface of the transparent substrate 20 as shown in FIG. 1, and a common electrode 31 is formed on the color filter and the black matrix.

한편, 투명기판 10의 한 면에는 화소전극 25와 TFT(Thin Film Transistor) 등의 스위칭소자 8이 구성된다.On the other hand, one surface of the transparent substrate 10 includes a switching element 8 such as a pixel electrode 25 and a thin film transistor (TFT).

상기와 같은 요소들이 구성된 투명기판 20과 10은 서로 대향하도록 소정의 간격을 두고 배치되고, 상기 기판의 배치로 인하여 형성된 공간에 액정 40이 개재된다.The transparent substrates 20 and 10 including the above elements are disposed at predetermined intervals to face each other, and the liquid crystal 40 is interposed in a space formed by the arrangement of the substrates.

화소전극 등이 형성된 투명기판 10의 이면에는 광원 50이 배치된다.The light source 50 is disposed on the back surface of the transparent substrate 10 on which the pixel electrode and the like are formed.

상기 액정표시장치에 빚을 이용하여 문자나 그림 등을 표현하는 매커니즘에 대하여 이하에 상세히 설명한다.A mechanism for expressing characters, pictures, and the like using debt in the liquid crystal display will be described in detail below.

도 2에서와 같이 공통전극 31에 전압을 인가하고, TFT 8을 온(ON)하여 화소전극25에 전압이 인가 되도록 하면 액정 40의 분자 각도가 변한다.As shown in FIG. 2, when the voltage is applied to the common electrode 31 and the TFT 8 is turned on to apply the voltage to the pixel electrode 25, the molecular angle of the liquid crystal 40 is changed.

이때, 화소전극 등이 형성된 투명기판 10의 이면에 배치된 광원 50에서 나오는 빛 60이 액정층 40과 칼라필터 36을 통과한다.At this time, the light 60 emitted from the light source 50 disposed on the rear surface of the transparent substrate 10 having the pixel electrode or the like passes through the liquid crystal layer 40 and the color filter 36.

즉, 빛이 통과된 픽셀(화소) 영역에 소정의 색상이 표시된다.That is, a predetermined color is displayed in the pixel (pixel) area where light passes.

한편, 도 3에서와 같이 TFT 8을 오프(OFF)하면 액정 40의 분자 각도가 다시 변하고 화소전극 등이 형성된 투명기판 10의 이면에 배치된 광원 50에서 나오는 빛 60이 액정 40을 통과하지 못하고 차폐된다.Meanwhile, as shown in FIG. 3, when the TFT 8 is turned off, the molecular angle of the liquid crystal 40 is changed again, and the light 60 emitted from the light source 50 disposed on the rear surface of the transparent substrate 10 having the pixel electrode or the like does not pass through the liquid crystal 40 and is shielded. do.

즉, TFT 8이 오프된 픽셀영역은 빛이 통과 되지 못하기 때문에 색상이 표시되지 않는다.That is, no color is displayed in the pixel area in which the TFT 8 is turned off because light cannot pass.

상기와 같이 각각의 픽셀마다 스위칭소자에 의하여 빛의 통과를 컨트롤함으로써 문자나 그림 등을 표현할 수 있는 표시화면을 구성할 수 있다.As described above, by controlling the passage of light by the switching element for each pixel, it is possible to configure a display screen on which characters, pictures, and the like can be expressed.

그런데, 종래의 액정표시장치는 광원 50에서 나오는 빛 60이 모두 평행하게 액정표시패널에 입사된다고 가정하면 상기 입사된 빛 60은 도 2와 같이 액정표시패널의 투명기판 20의 면과 직각을 이루고 통과한다.However, in the conventional liquid crystal display device, assuming that all the light 60 emitted from the light source 50 is incident on the liquid crystal display panel in parallel, the incident light 60 passes through at a right angle with the plane of the transparent substrate 20 of the liquid crystal display panel as shown in FIG. 2. do.

따라서, 액정표시장치의 정면방향 즉, B방향에서 화면을 바라보았을 때는 선명하게 화면의 내용을 인식할 수 있지만, 측면방향 즉, A와 C 방향에서 바라보았을 때는 시야각이 좁기 때문에 화면의 내용을 선명하게 인식할 수 없는 문제점이 있다.Therefore, when looking at the screen from the front direction of the liquid crystal display device, that is, the B direction, the contents of the screen can be clearly recognized, but when viewed from the side directions, that is, the A and C directions, the viewing angle is narrow, so that the contents of the screen There is a problem that cannot be recognized.

본 발명은 상기와 같은 종래 액정표시장치의 문제점을 해결하기 위하여 칼라필터를 통과한 빛이 굴절되도록 광학장치를 액정표시패널에 설치한다.In order to solve the problems of the conventional liquid crystal display device as described above, the optical device is installed in the liquid crystal display panel so that light passing through the color filter is refracted.

특히, 광학장치로서 칼라필터가 형성된 투명기판의 이면부에 마이크로렌즈를 형성한다.In particular, a microlens is formed on the rear surface of the transparent substrate on which the color filter is formed as an optical device.

상기 마이크로렌즈가 형성되면 칼라필터를 통과한 빛이 마이크로렌즈를 통과할때 굴절되기 때문에 시야각이 그만큼 넓어지고, 액정표시패널의 측면부에서도 선명하게 화면의 표시 내용을 인식할 수 있다.When the microlens is formed, light passing through the color filter is refracted when passing through the microlens, thereby widening the viewing angle, and clearly recognizing display contents on the side of the liquid crystal display panel.

따라서, 본 발명의 목적은 광시야각을 갖는 액정표시장치를 제조하고, 제공하는 데 있다.Accordingly, an object of the present invention is to manufacture and provide a liquid crystal display device having a wide viewing angle.

도 1은 종래 액정표시장치의 단면도이고,1 is a cross-sectional view of a conventional liquid crystal display device;

도2, 도 3은 액정표시장치의 화면표시의 원리를 설명하기 위한 단면도이고,2 and 3 are cross-sectional views for explaining the principle of screen display of a liquid crystal display device;

도 4, 도 5, 도 6, 도 7은 본 발명의 액정표시장치의 제조과정을 설명하기 위한 단면도이고,4, 5, 6 and 7 are cross-sectional views illustrating a manufacturing process of the liquid crystal display device of the present invention.

도 8은 본 발명의 액정표시장치의 단면도이다.8 is a cross-sectional view of the liquid crystal display device of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings

8,108 : TFT 10,20,110,120 : 투명기판8,108: TFT 10,20,110,120: Transparent substrate

25,125 : 화소전극 31,131 : 공통전극25,125: pixel electrode 31,131: common electrode

35,135 : 블랙매트릭스 36,136 : 칼라필터35,135: Black Matrix 36,136: Color Filter

150 : 막 180 : 마이크로렌즈150: membrane 180: microlens

190 : 막의 개구부190: opening of the membrane

본 발명의 액정표시장치는 복수개의 화소전극이 포함되어 형성된 제 1기판과, 복수개의 칼라필터가 포함되어 형성된 제 2기판이 소정의 간격을 두고 상기 각각의 화소전극과 상기 각각의 칼라필터가 대응하도록 배치되고, 상기 소정의 간격에 의하여 형성된 공간에 액정이 개재되어 구성된다.In the liquid crystal display of the present invention, each of the pixel electrodes and the respective color filters correspond to a first substrate formed by including a plurality of pixel electrodes and a second substrate formed by including a plurality of color filters at predetermined intervals. It arrange | positioned so that a liquid crystal may be interposed in the space formed by the said predetermined space | interval.

특히, 상기 제 2기판의 이면에는 복수의 개구부(상기 각각의 칼라필터에 대응하는 영역내에 상기 각각의 칼라필터의 면적보다 작고, 중심축은 상기 각각의 칼라필터의 중심축과 대략 일치함)가 형성된 막이 구성되고, 또, 상기 제 2기판의 이면부에는 상기 각각의 칼라필터에 대응하는 영역 내에 상기 칼라필터의 중심축과 대략 일치하는 중심축을 갖고, 상기 개구부 보다 큰 렌즈가 구성되는 것을 특징으로 한다.In particular, a plurality of openings (smaller than the area of each color filter in the area corresponding to each color filter, the central axis of which is substantially coincident with the central axis of the respective color filters) are formed on the rear surface of the second substrate. And a film having a central axis substantially coincident with the central axis of the color filter in a region corresponding to each of the color filters, and having a lens larger than the opening. .

상기와 같이 구성되는 본 발명의 액정표시장치의 제조방법을 간략히 기술하면 제 1기판과 제 2기판 사이에 액정을 개재하고, 합착한 후에 상기 제 2기판의 이면에 소정의 두께로 막을 형성하는 공정, 상기 제 2기판의 각각의 칼라필터와 대응하는 영역 내의 상기 막에 상기 칼라필터의 면적보다 작고, 중심축은 상기 칼라필터의 중심축과 대략 일치하는 개구부를 형성하는 공정, 상기 개구부가 형성된 막을 마스크로 하고, 상기 제 2기판의 이면부를 에칭하여 렌즈를 형성하는 공정을 포함한다.Briefly describing the manufacturing method of the liquid crystal display device of the present invention configured as described above is a step of forming a film with a predetermined thickness on the back surface of the second substrate after the liquid crystal is interposed between the first substrate and the second substrate. Forming an opening in the film in an area corresponding to each color filter of the second substrate, the opening being smaller than the area of the color filter and having a central axis substantially coincident with the central axis of the color filter, masking the film on which the opening is formed. And etching the back surface of the second substrate to form a lens.

이하 실시예에서 본 발명의 액정표시장치의 제조방법 및 작용 등을 상세히 설명한다.Hereinafter, the method and operation of the liquid crystal display of the present invention will be described in detail.

본 발명의 실시예는 도 4 ∼도 8을 주로 참고하여 설명한다.Embodiments of the present invention will be described with reference to Figs.

[실시예 1]Example 1

도 4에서와 같이 스위칭소자로 기능하는 복수개의 TFT 108과 상기 TFT의 한 단자와 접촉되는 각각의 화소전극 125 등이 형성된 투명기판 110이 제조된다.As shown in FIG. 4, a transparent substrate 110 having a plurality of TFTs 108 serving as switching elements and pixel electrodes 125 and the like contacted with one terminal of the TFTs is formed.

한편, 블랙매트릭스 135와 복수개의 칼라필터 136이 매트릭스상으로 형성되고, 상기 블랙매트릭스와 칼라필터위에 공통전극이 형성된 투명기판 120이 제조된다.Meanwhile, the black matrix 135 and the plurality of color filters 136 are formed in a matrix, and a transparent substrate 120 having a common electrode formed on the black matrix and the color filter is manufactured.

상기 각각의 화소전극 125와 상기 각각의 칼라필터 136이 대응하도록 상기 투명기판 110과 120을 씰과 스페이서를 이용하여 합착한다.The transparent substrates 110 and 120 are bonded to each other by using the seal and the spacer so that the pixel electrodes 125 and the color filters 136 correspond to each other.

상기 스페이서는 기판 사이에 공간이 형성되도록 하고, 상기 씰은 공간이 패쇄되도록 하여 소정의 챔버를 이루도록 한다.The spacer allows a space to be formed between the substrates, and the seal allows the space to be closed to form a predetermined chamber.

상기 챔버 내에 액정을 주입하고 봉합하면 하나의 액정표시패널이 구성된다.When a liquid crystal is injected into the chamber and sealed, a liquid crystal display panel is configured.

상기 액정표시패널을 구성한후 도 5와 같이 투명기판 120의 이면에 ITO(Indium Tin Oxide)등의 금속 또는 무기물질 등으로 된 막 150을 소정의 두께로 형성하고 포토레지스트를 이용한 패터닝 방법으로 개구부 190을 형성한다.After forming the liquid crystal display panel, as shown in FIG. 5, a film 150 made of a metal or an inorganic material such as indium tin oxide (ITO), etc., is formed on the rear surface of the transparent substrate 120 to a predetermined thickness, and the opening 190 is formed by a patterning method using a photoresist. To form.

상기 막 150은 ITO 등의 투명물질인 것이 바람직하지만 경우에 따라서는 불투명 물질을 사용할 수 있다.The membrane 150 may be a transparent material such as ITO, but in some cases, an opaque material may be used.

특히, 상기 개구부 190은 칼라필터 136과 대응하는 영역내에 형성되고, 상기 개구부의 중심축은 칼라필터의 중심축 A와 거의 일치하도록 형성하는 것이 바람직하다.In particular, the opening 190 is formed in a region corresponding to the color filter 136, and the central axis of the opening is preferably formed to substantially coincide with the central axis A of the color filter.

또, 상기 개구부 190은 칼라필터의 면적보다 작도록 폭 D가 50㎛ 이하로 형성되는 것이 바람직하다.In addition, the opening 190 is preferably formed with a width D of 50 μm or less so as to be smaller than the area of the color filter.

상기와 같이 개구부 190의 폭을 좁게 형성함으로써, 이후에 이상적인 효과를 얻을 수 있는 마이크로렌즈를 형성할 수 있다.By narrowing the width of the opening 190 as described above, it is possible to form a microlens that can obtain an ideal effect later.

상기 마이크로렌즈를 형성하는 과정 및 렌즈의 작용을 도 6, 도 7에 의하여 설명한다.The process of forming the microlenses and the operation of the lens will be described with reference to FIGS. 6 and 7.

막 150을 마스크로 하여 개구부 190 부분의 투명기판 120의 이면부에 HF가 5∼25% 함유된 에칭액을 주입한다.Using the film 150 as a mask, an etching solution containing 5 to 25% of HF is injected into the rear surface of the transparent substrate 120 in the opening portion 190.

상기 주입된 에칭액에 의하여 상기 투명기판 120은 상기 막 150의 개구부의 중심축 A를 중심으로 가장 깊게 에칭되고, 중심축 A에서 멀어질수록 에칭 깊이가 서서히 감소하면서 원호형의 마이크로렌즈 180을 형성하게 된다.The transparent substrate 120 is deeply etched about the central axis A of the opening of the film 150 by the injected etching solution, and as the distance from the central axis A decreases, the etching depth gradually decreases to form an arc-shaped microlens 180. do.

따라서, 도 7과 같이 칼라필터를 통과한 빛 60이 마이크로렌즈면에 도달하면 투명기판 120의 두께차이로 인하여 마이크로렌즈면의 위치마다 각각 다른 굴절율을 갖고 굴절되는 빛이 개구부 190을 통과한다.Therefore, when the light 60 passing through the color filter reaches the microlens surface as shown in FIG. 7, the light that is refracted with different refractive indices for each position of the microlens surface passes through the opening 190 due to the thickness difference of the transparent substrate 120.

상기와 같은 마이크로렌즈의 원리를 본 발명의 액정표시장치에 이용함으로써 액정표시패널의 중앙부분 즉, B부분 뿐만 아니라 측면부분(A,C부분)에서도 선명한 화면을 인식할 수 있다.By using the principles of the microlenses in the liquid crystal display device of the present invention, a clear screen can be recognized not only in the center portion of the liquid crystal display panel, that is, in the B portion but also in the side portions (A, C portions).

상기 투명기판 120의 이면에 형성되는 막 150의 개구부 190 및 마이크로렌즈 180 등의 평면 패턴은 도 8과 같다.The planar patterns of the opening 190 and the microlens 180 of the film 150 formed on the rear surface of the transparent substrate 120 are illustrated in FIG. 8.

상기 도 8의 F-F선을 따라 절단한 단면이 도 6의 구조가 됨을 쉽게 이해할 수 있을 것이다.It will be readily understood that the cross section taken along the line F-F of FIG. 8 becomes the structure of FIG. 6.

본 발명의 액정표시장치는 투명기판의 이면 즉, 칼라필터가 형성된 투명기판의 이면에 소정의 막을 형성하고, 상기 막에 50㎛ 이하의 폭을 갖는 개구부를 형성한다.In the liquid crystal display device of the present invention, a predetermined film is formed on the back surface of the transparent substrate, that is, the back surface of the transparent substrate on which the color filter is formed, and an opening having a width of 50 μm or less is formed in the film.

특히, 상기 막을 마스크로 하고, 개구부 부분의 투명기판의 이면부에 에칭액을 주입하여 마이크로렌즈를 형성하는 것을 특징으로 한다.In particular, a microlens is formed by using the film as a mask and injecting etching liquid into the back surface of the transparent substrate in the opening portion.

상기 방법을 이용함으로써 마이크로렌즈 형상의 패턴을 균일하고 정확하게 형성할 수 있다.By using this method, a microlens-shaped pattern can be formed uniformly and accurately.

상기와 같이 균일하고 정확한 마이크로렌즈가 칼라필터의 이면에 형성됨으로써 칼라필터를 통과한 빛이 굴절되어 개구부를 통과하게 된다.As described above, a uniform and accurate microlens is formed on the rear surface of the color filter so that light passing through the color filter is refracted and passes through the opening.

따라서 본 발명의 액정표시장치는 광시야각을 갖기 때문에 화면의 측면부에서도 문자나 그림 등을 선명하게 인식할 수 있는 효과가 있다.Therefore, since the liquid crystal display of the present invention has a wide viewing angle, it is possible to clearly recognize characters, pictures, and the like on the side of the screen.

Claims (8)

복수개의 화소전극이 포함되어 형성된 제 1기판과, 복수개의 칼라필터가 포함되어 형성된 제 2기판은 소정의 간격을 두고 상기 각각의 화소전극과 상기 각각의 칼라필터가 대응하도록 배치되고, 상기 소정의 간격에 의하여 형성된 공간에 액정이 개재되어 구성된 액정표시장치에 있어서, 상기 제 2기판의 이면부에는 상기 복수개의 칼라필터에 각각 대응하여 개구부가 형성된 막이 구비되고, 상기 개구부보다 큰 복수개의 마이크로렌즈가 구비되는 것을 특징으로 하는 액정표시장치.The first substrate formed by including a plurality of pixel electrodes and the second substrate formed by including a plurality of color filters are arranged to correspond to each of the pixel electrodes and the respective color filters at predetermined intervals. A liquid crystal display device comprising liquid crystals interposed in a space formed by a gap, wherein a rear surface portion of the second substrate includes a film having openings corresponding to the plurality of color filters, and a plurality of micro lenses larger than the openings. Liquid crystal display device characterized in that it is provided. 제 1항에 있어서, 상기 제 2기판의 이면부에 구비된 복수개의 개구부는 상기 칼라필터의 중심축과 대략 일치하는 중심축을 갖고, 상기 각각의 칼라필터의 면적보다 작은 것을 특징으로 하는 액정표시장치.The liquid crystal display of claim 1, wherein the plurality of openings provided on the rear surface of the second substrate have a central axis substantially coincident with the central axis of the color filter and are smaller than the area of each of the color filters. . 제 1항에 있어서, 상기 제 2기판의 이면에 형성되는 막은 금속막 혹은 무기막인 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to claim 1, wherein the film formed on the back surface of the second substrate is a metal film or an inorganic film. 제 1항에 있어서, 상기 제 2기판의 이면부의 마이크로렌즈는 상기 개구부가 형성된 막을 마스크로하여 에칭함으로써 구성되는 것을 특징으로 하는 액정표시장치.2. The liquid crystal display device according to claim 1, wherein the microlenses of the back surface portion of the second substrate are formed by etching the film having the opening formed as a mask. 제 4항에 있어서, 상기 에칭은 5∼25%의 HF 액이 이용되는 것을 특징으로 하는 액정표시장치.5. The liquid crystal display device according to claim 4, wherein 5 to 25% of HF liquid is used for the etching. 제 1항내지 제 5항 중 어느 한 항에 있어서, 상기 개구부의 폭은 50㎛ 이하의 폭을 갖는 것을 특징으로 하는 액정표시장치.The liquid crystal display device according to any one of claims 1 to 5, wherein the opening has a width of 50 µm or less. 복수개의 화소전극이 포함되어 형성된 제 1기판과, 복수개의 칼라필터가 포함되어 형성된 제 2기판은 소정의 간격을 두고 상기 각각의 화소전극과 상기 각각의 칼라필터가 대응하도록 배치되고, 상기 소정의 간격에 의하여 형성된 공간에 액정이 개재되어 구성된 액정표시장치의 제조방법에 있어서, 상기 제 2기판의 이면에 소정의 두께로 막을 형성하는 공정과, 상기 각각의 칼라필터와 대응하는 영역 내의 상기 막에 상기 칼라필터의 면적 보다 작고, 중심축은 상기 칼라필터의 중심축과 대략 일치하는 개구부를 형성하는 공정과, 상기 개구부가 형성된 막을 마스크로 하고, 상기 제 2기판의 이면부를 에칭하여 마이크로렌즈를 형성하는 공정을 포함하는 것을 특징으로 하는 액정표시장치의 제조방법.The first substrate formed by including a plurality of pixel electrodes and the second substrate formed by including a plurality of color filters are arranged to correspond to each of the pixel electrodes and the respective color filters at predetermined intervals. A method of manufacturing a liquid crystal display device comprising liquid crystals interposed in a space formed by a gap, the method comprising: forming a film with a predetermined thickness on the back surface of the second substrate, and in the film in a region corresponding to each of the color filters. Forming an opening smaller than an area of the color filter and having a central axis substantially coincident with the central axis of the color filter; and forming a microlens by etching a back surface of the second substrate using a film having the opening formed as a mask; A method of manufacturing a liquid crystal display device comprising the step of. 제 7항에 있어서, 상기 막을 형성하는 공정은 상기 제 1기판과 제 2기판 사이에 상기 액정을 주입하고 봉합한 후에 실시되는 것을 특징으로 하는 액정표시장치의 제조방법.8. The method of claim 7, wherein the forming of the film is performed after injecting and sealing the liquid crystal between the first substrate and the second substrate.
KR1019970015199A 1997-04-23 1997-04-23 Lcd with wide viewing angle and fabricating method thereof KR100309211B1 (en)

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