KR20030045454A - Dispersion color filter have lcd - Google Patents

Dispersion color filter have lcd Download PDF

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Publication number
KR20030045454A
KR20030045454A KR1020010076178A KR20010076178A KR20030045454A KR 20030045454 A KR20030045454 A KR 20030045454A KR 1020010076178 A KR1020010076178 A KR 1020010076178A KR 20010076178 A KR20010076178 A KR 20010076178A KR 20030045454 A KR20030045454 A KR 20030045454A
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KR
South Korea
Prior art keywords
liquid crystal
color filter
scattering
crystal display
display device
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KR1020010076178A
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Korean (ko)
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김희철
서동해
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비오이 하이디스 테크놀로지 주식회사
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Priority to KR1020010076178A priority Critical patent/KR20030045454A/en
Publication of KR20030045454A publication Critical patent/KR20030045454A/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
    • G02F1/1335—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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/028—Improving the quality of display appearance by changing the viewing angle properties, e.g. widening the viewing angle, adapting the viewing angle to the view direction

Abstract

PURPOSE: A liquid crystal display device with scattering type color filters is provided to obtain desired phase change in a liquid crystal layer by scattering the light while passing through color filters, thereby improving the wide viewing angle characteristics. CONSTITUTION: A liquid crystal display device with scattering type color filters includes a plurality of black matrixes(40) disposed on an upper substrate by a predetermined interval, color filters(50) formed among the black matrixes and containing scattering elements(60) in resin thereof, electrodes formed on the surfaces of the color filters and the lower substrate for changing the orientation of liquid crystal in response to a voltage supply, a polarization plate attached to outer surfaces of the upper and lower substrates, liquid crystal filled between the upper and lower substrates, and a sealant for sealing the liquid crystal between the upper and lower substrates.

Description

산란형 칼라필터를 구비한 액정표시장치{DISPERSION COLOR FILTER HAVE LCD}Liquid crystal display device with scattering color filter {DISPERSION COLOR FILTER HAVE LCD}

본 발명은 산란형 칼라필터를 구비한 액정표시장치에 관한 것으로, 특히 칼라필터에 산란특성을 부가하여 투과되는 빛을 산란시키므로 액정표시장치에 광시야 특성을 부여할 수 있는 산란형 칼라필터를 구비한 액정표시장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having a scattering color filter, and more particularly, to scatter light transmitted by adding scattering properties to the color filter, so that the liquid crystal display device has a scattering color filter that can impart a wide field of view. It relates to a liquid crystal display device.

일반적으로 액정표시장치는 박막 트랜지스터 어레이(TFT array)가 형성된 기판과 칼라필터가 형성된 기판을 합착하여 두 기판 사이에 액정을 삽입시키고 바깥면에는 편광판을 부착시켜 액정층과 두 장의 기판 사이에 위치한 투명전극에 입력시킨 전기신호에 따라 액정을 움직이게 하여 편광판을 지난 빛의 편광방향을 조절, 빛의 통과 및 차단을 조절할 수 있도록 되어 있다.In general, a liquid crystal display device bonds a substrate on which a TFT array is formed with a substrate on which a color filter is formed, inserts a liquid crystal between two substrates, and attaches a polarizing plate to an outer surface thereof, thereby providing a transparent layer positioned between the liquid crystal layer and two substrates. By moving the liquid crystal in accordance with the electrical signal input to the electrode to control the polarization direction of the light passing through the polarizer, it is possible to control the passage and blocking of light.

그러나 통상적으로 액정표시장치는 TN(Twisted Nematic)모드로 구동되고 뒷면에 백 라이트(Back Light)를 부착하여 그 빛이 TN 액정층을 통과하여 화면이 구형되도록 형성되어 있다. 이렇게 제작된 투과형 TN-LCD는 그 화면 품위에 있어서 보는 시야가 달라짐에 따라 액정층을 통과하는 광경로가 바뀌기 때문에 시야각이 상대적으로 좁은 단점이 있다.In general, however, the liquid crystal display is driven in a twisted nematic (TN) mode, and a back light is attached to the rear surface so that the light passes through the TN liquid crystal layer to form a screen. The TN-LCD manufactured as described above has a disadvantage that the viewing angle is relatively narrow because the optical path passing through the liquid crystal layer is changed as the viewing field of the screen quality changes.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출한 것으로 칼라필터의 레진(resin)내에 산란소자를 포함시키므로 광시야 특성을 갖는 산란형 칼라필터를 구비한 액정표시장치를 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device having a scattering color filter having a wide field of view because the scattering device is included in a resin of a color filter.

도 1은 본 발명의 일실시예에 따른 산란형 칼라필터를 구비한 액정표시장치의 단면도1 is a cross-sectional view of a liquid crystal display device having a scattering color filter according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

10 : 상부기판 20 : 하부기판10: upper substrate 20: lower substrate

30 : 액정 40 : 블랙 매트릭스30: liquid crystal 40: black matrix

50 : 칼라필터 60 : 산란소자50: color filter 60: scattering elements

70a,70b : 전극 80a,80b : 편광판70a, 70b: electrode 80a, 80b: polarizing plate

100 : 백 라이트 110 : 도광판100: backlight 110: light guide plate

120 : 집광성 소자120: light converging element

상기와 같은 목적을 달성하기 위한 본 발명의 산란형 칼라필터를 구비한 액정표시장치는 상부기판과 하부기판이 서로 일정간격을 유지하며 대향되게 배치된 액정표시장치에 있어서, 상기 상부기판상에 일정간격을 갖는 복수개의 블랙 매트릭스와, 상기 블랙 매트릭스의 사이에 형성되고 그 레진내에 산란소자가 포함된 칼라필터와, 상기 칼라필터 표면과 상기 하부기판에 형성되어 전압 인가시 상기 액정의 방향자가 변화하도록 하는 전극과, 상기 상부기판과 하부기판 바깥면에 부착된 편광판과, 상기 상부기판과 하부기판 사이에 채워지는 액정과, 상기 상부기판과 하부기판을 밀봉시키는 실재로 구성됨을 특징으로 한다.The liquid crystal display device having a scattering color filter of the present invention for achieving the above object is a liquid crystal display device in which the upper substrate and the lower substrate are arranged to face each other while maintaining a constant interval, the predetermined on the upper substrate A plurality of black matrices having a spacing, a color filter formed between the black matrices and scattering elements in the resin, and formed on the surface of the color filter and the lower substrate so that the director of the liquid crystal changes when voltage is applied; And an electrode, a polarizing plate attached to the outer surface of the upper substrate and the lower substrate, a liquid crystal filled between the upper substrate and the lower substrate, and a material sealing the upper substrate and the lower substrate.

또한, 상기 산란소자의 크기는 1.0∼5㎛인 것이 바람직하다.In addition, the size of the scattering device is preferably 1.0 to 5㎛.

또한, 상기 산란소자의 재료는 유리, 실리카, 플라스틱, 반도체인 것이 바람직하다.In addition, the material of the scattering element is preferably glass, silica, plastic, semiconductor.

또한, 상기 산란소자의 굴절률은 1.6∼2.5 사이인 것이 바람직하다.In addition, the refractive index of the scattering element is preferably between 1.6 and 2.5.

이하, 첨부된 도면을 참조하여 본 발명의 산란형 칼라필터를 구비한 액정표시장치에 대하여 보다 상세히 설명하기로 한다.Hereinafter, a liquid crystal display device having a scattering color filter of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일실시예에 따른 산란형 칼라필터를 구비한 액정표시장치의 단면도이다.1 is a cross-sectional view of a liquid crystal display device having a scattering color filter according to an exemplary embodiment of the present invention.

도 1에 도시한 바와 같이 상부기판(10)과 하부기판(20)이 서로 일정간격을 유지하며 대향되게 배치되고, 상기 상부기판(10)과 하부기판(20) 사이에 액정(30)이 주입된다.As shown in FIG. 1, the upper substrate 10 and the lower substrate 20 are disposed to face each other with a predetermined distance therebetween, and the liquid crystal 30 is injected between the upper substrate 10 and the lower substrate 20. do.

상기 상부기판(10)상에 일정간격을 갖는 복수개의 블랙 매트릭스(50)와, 상기 블랙 매트릭스(40)의 사이에 형성되는 칼라필터(50)로 구성된다. 이때, 상기 칼라필터(50)는 그 레진내에 산란소자(60)를 포함한다.It consists of a plurality of black matrix 50 having a predetermined interval on the upper substrate 10, and the color filter 50 formed between the black matrix 40. At this time, the color filter 50 includes a scattering element 60 in the resin.

한편, 상기 산란소자(60)는 그 색이 칼라필터(50)의 색과 유사하고 굴절률은 칼라필터(50)의 성분보다 높은 고굴절의 특성을 갖는 물질로 구성되며, 크기는 빛의 편광성을 변화시키지 않기 위하여 가시광선의 파장(0.4∼0.8㎛)보다 큰 크기로 구성되어야 한다. 즉, 상기 산란소자(60)의 크기는 1.0∼3.0㎛이다. 따라서, 상기산란소자(60)의 재료는 유리, 실리카, 플라스틱, 반도체 등을 사용하고, 굴절률은 1.6∼2.5 사이의 높은 굴절률을 가져야 한다.On the other hand, the scattering element 60 is made of a material whose color is similar to the color of the color filter 50 and the refractive index is higher than the components of the color filter 50, the size of the polarization of light In order not to change, it should be configured to be larger than the wavelength of the visible light (0.4 ~ 0.8㎛). That is, the size of the scattering device 60 is 1.0 ~ 3.0㎛. Therefore, the material of the scattering element 60 is made of glass, silica, plastics, semiconductors, and the like, and the refractive index should have a high refractive index between 1.6 and 2.5.

그리고 상기 칼라필터(50)와 상기 하부기판(20)의 표면에 전극(70a,70b)을 각각 형성시키므로 전압 인가시 전기장이 형성되어 상기 액정(30)의 방향자를 변화하도록 한다. 상기 상부기판(10)과 하부기판(20) 바깥 면에 각각 편광판(80a,80b)이 부착되고, 상기 상부기판(10)과 하부기판(20)은 실(seal)재(90)에 의해 밀봉된다.In addition, since the electrodes 70a and 70b are formed on the surface of the color filter 50 and the lower substrate 20, electric fields are formed when voltage is applied to change the director of the liquid crystal 30. Polarizing plates 80a and 80b are attached to outer surfaces of the upper substrate 10 and the lower substrate 20, respectively, and the upper substrate 10 and the lower substrate 20 are sealed by a seal material 90. do.

한편, 백 라이트(100)에서 나온 빛은 도광판(110)을 통해 빛이 전달되고, 그 빛이 위쪽으로 발산되어 집광성 소자(120)에 의해 상기 하부기판(20)과 수직으로 나오는 빛의 세기가 매우 높아지도록 변형시켜 그 빛이 상기 편광판(80b)을 통과하면서 편광된 성질을 지니고 상기 하부기판(20) 내부로 전달되어 상기 액정(30)을 통과한 후, 상기 칼라필터(50)에 도달한다. 이때, 상기 칼라필터(50) 레진내의 산란소자(60)는 굴절률의 차이에 의해 빛의 편광성질은 변화시키지 않으면서 수직의 빛을 산란시켜 빛의 경로를 바꾼다. 이렇게 경로가 바뀐 빛이 다음 산란소자(60)에 도달하여 경로가 또 한번 바뀌게 된다.On the other hand, the light emitted from the backlight 100 is transmitted through the light guide plate 110, the light is emitted upward and the intensity of light emitted perpendicularly to the lower substrate 20 by the light converging element 120 Is deformed so as to be very high so that the light passes through the polarizing plate 80b, has a polarized property, is transferred into the lower substrate 20, passes through the liquid crystal 30, and reaches the color filter 50. do. At this time, the scattering element 60 in the resin of the color filter 50 changes the path of the light by scattering the vertical light without changing the polarization property of the light by the difference in refractive index. The path changed light reaches the next scattering element 60 so that the path is changed again.

따라서, 이렇게 빛의 경로가 여러 번 바뀌게 되면 수직으로 칼라필터에 입사된 빛은 칼라필터를 통과할 때 여러 방향으로 산란하게 되고 이를 통해 액정표시장치의 수직에서뿐만 아니라 측면에서도 통과하는 빛을 볼 수 있다.Therefore, when the light path is changed several times, light incident on the color filter vertically is scattered in various directions when passing through the color filter, and thus the light passing through the side as well as the vertical of the liquid crystal display can be seen. .

한편, 상기 산란소자(60)의 크기를 상기 칼라필터(50) 레진의 두께보다 크게 할 경우 즉, 산란소자(60)의 크기를 2∼5㎛ 정도이면 빛의 산란은 칼라필터(50)내에서 발생하는 것보다 액정의 표면 배향의 다양함에서 기인하는 빛의 산란이 더 크게 작용하게 된다. 따라서, 상기 산란소자()의 굴절률은 그리 중요하지 않으며 칼라필터(50) 레진의 바깥으로 나온 산란소자의 크기가 중요하다.On the other hand, when the size of the scattering device 60 is larger than the thickness of the resin of the color filter 50, that is, when the size of the scattering device 60 is about 2 ~ 5㎛ about the scattering of light in the color filter 50 The scattering of light due to the variation in the surface orientation of the liquid crystal is greater than that occurring at. Therefore, the index of refraction of the scattering element is not very important, and the size of the scattering element coming out of the resin of the color filter 50 is important.

이상에서 설명한 바와 같이 본 발명의 산란형 칼라필터를 구비한 액정표시장치에 의하면, 액정표시장치의 하부기판, 액정층, 칼라필터 그리고 상부기판을 통과하는 경로가 직선으로 이루어지지 않고 칼라필터를 통과하면서 빛이 산란되기 때문에 투과형 LCD에서 수직으로 입사되는 빛을 통과시킨 후, 다양한 시야각에서 관측할 수 있다.As described above, according to the liquid crystal display device having the scattering color filter of the present invention, a path through the lower substrate, the liquid crystal layer, the color filter, and the upper substrate of the liquid crystal display does not have a straight line but passes through the color filter. Since light is scattered while passing through the vertically incident light from the transmissive LCD, it can be observed from various viewing angles.

따라서, 액정층을 수직으로 통과하면서 원하는 위상변화를 액정층에서 얻을 수 있고, 칼라필터를 통과하면서 산란하기 때문에 광시야각의 특성을 갖는 액정표시장치를 제조할 수 있다.Therefore, a desired phase change can be obtained in the liquid crystal layer while passing vertically through the liquid crystal layer, and the liquid crystal display device having a wide viewing angle can be manufactured because it scatters while passing through the color filter.

Claims (4)

상부기판과 하부기판이 서로 일정간격을 유지하며 대향되게 배치된 액정표시장치에 있어서,In a liquid crystal display device in which the upper substrate and the lower substrate are disposed to face each other while maintaining a predetermined interval, 상기 상부기판상에 일정간격을 갖는 복수개의 블랙 매트릭스와;A plurality of black matrices having a predetermined interval on the upper substrate; 상기 블랙 매트릭스의 사이에 형성되고 그 레진내에 산란소자가 포함된 칼라필터와;A color filter formed between the black matrix and including scattering elements in the resin; 상기 칼라필터 표면과 상기 하부기판에 형성되어 전압 인가시 상기 액정의 방향자가 변화하도록 하는 전극과;An electrode formed on the surface of the color filter and the lower substrate to change the director of the liquid crystal when a voltage is applied; 상기 상부기판과 하부기판 바깥면에 부착된 편광판과;A polarizer attached to outer surfaces of the upper and lower substrates; 상기 상부기판과 하부기판 사이에 채워지는 액정과;A liquid crystal filled between the upper substrate and the lower substrate; 상기 상부기판과 하부기판을 밀봉시키는 실재로 구성됨을 특징으로 하는 산란형 칼라필터를 구비한 액정표시장치.And a scattering color filter, wherein the upper substrate and the lower substrate are sealed. 제 1 항에 있어서,The method of claim 1, 상기 산란소자의 크기는 1.0∼5.0㎛인 것을 특징으로 하는 산란형 칼라필터를 구비한 액정표시장치.A liquid crystal display device having a scattering color filter, characterized in that the size of the scattering element is 1.0 to 5.0㎛. 제 1 항에 있어서,The method of claim 1, 상기 산란소자의 재료는 유리, 실리카, 플라스틱, 반도체인 것을 특징으로하는 산란형 칼라필터를 구비한 액정표시장치.A material of the scattering element is glass, silica, plastic, semiconductor, the liquid crystal display device having a scattering color filter. 제 1 항에 있어서,The method of claim 1, 상기 산란소자의 굴절률은 1.6∼2.5 사이인 것을 특징으로 하는 산란형 칼라필터를 구비한 액정표시장치.And a refractive index of the scattering element is in a range of 1.6 to 2.5.
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KR20230064580A (en) 2021-11-03 2023-05-10 주식회사 엘지에너지솔루션 Apparatus and method for estimating electrical impedance spectroscopy of battery and system using the same

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US11397325B2 (en) 2016-11-28 2022-07-26 Samsung Display Co., Ltd. Display apparatus and head-mounted electronic device including the same
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