KR20100068636A - Fringe-field switching liquid crystal device using blue phase liquid crystal - Google Patents

Fringe-field switching liquid crystal device using blue phase liquid crystal Download PDF

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KR20100068636A
KR20100068636A KR1020080127057A KR20080127057A KR20100068636A KR 20100068636 A KR20100068636 A KR 20100068636A KR 1020080127057 A KR1020080127057 A KR 1020080127057A KR 20080127057 A KR20080127057 A KR 20080127057A KR 20100068636 A KR20100068636 A KR 20100068636A
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liquid crystal
electrode
common electrode
patterned
pixel electrode
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KR1020080127057A
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Korean (ko)
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이승희
임영진
정준호
김민수
김미영
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전북대학교산학협력단
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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
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel 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
    • 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
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134318—Electrodes characterised by their geometrical arrangement having a patterned common electrode
    • 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
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
    • 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

Abstract

PURPOSE: A fringe field switching liquid crystal device using a blue phase liquid crystal is provided to use a liquid crystal with optically anisotropic characteristics, thereby providing a complete dark state during an initial dark state. CONSTITUTION: A transparent common electrode(1) is formed in a slit form. Pixel electrodes(2) of a slit form are formed with an insulating layer between the pixel electrodes. The distance between electrodes of a common electrode is smaller than the electrode width of the pixel electrode. A voltage is applied through a thin film transistor connected to the pixel electrode. A fringe field electric field is formed between a patterned common electrode and a patterned pixel electrode. A liquid crystal layer has optically anisotropic characteristics by applying a voltage.

Description

블루상 액정을 이용한 프린지필드 스위칭 액정표시소자{Fringe-Field Switching Liquid Crystal Device using Blue Phase Liquid Crystal}Fringe-Field Switching Liquid Crystal Device using Blue Phase Liquid Crystal

본 발명은 광학적으로 등방성을 갖는 블루상 액정을 중대형 액정디스플레이에 적용하기 위한 것으로, 특히 전기장세기가 강하게 걸리는 FFS모드 액정표시소자에 상기 액정을 적용함으로써 낮은 전압에서도 쉽게 구동이 가능하고, 전압인가전에는 광학적으로 등방성인 특징을 가지고, 전압인가시 전압인가 방향에 광학적으로 이등방성 특징을 갖는 공통전극이 슬릿형태로 패턴된 FFS 액정표시장치에 관한 것이다.The present invention is to apply an optically isotropic blue phase liquid crystal to a medium and large liquid crystal display, and in particular, by applying the liquid crystal to an FFS mode liquid crystal display device having high electric field strength, it can be easily driven even at a low voltage. The present invention relates to an FFS liquid crystal display device having an optically isotropic characteristic and having a common electrode having an optically anisotropic characteristic in a voltage application direction when voltage is applied in a slit form.

최근 네마틱 액정디스플레이를 이용한 액정디스플레이의 고질적인 문제인 응답속도나 시야각 의존성을 해결하기 위해 광학적으로 등방성인 액정디스플레이의 연구가 국내외적으로 활발히 연구되고 있다. 하지만 기존에 개발된 광학적으로 등방성인 액정디스플레이는 전기장 세기가 약한 In-plane switching(IPS)만을 이용하여 디바이스에 적용했기 때문에 구동전압이 100v 이상으로 매우 높고, 구동되는 온도범위가 수도로 매우 낮은 문제가 발생하여 상용화 시키기에 아직까지 미흡한 실정이다. 또한 광학적으로 등방성인 액정을 이용한 액정 디스플레이는 시야각 의존 성의 측면에서 브라운관과 비교해 봤을 때 그 성능이 떨어지지 않기 때문에 시야각 의존성에 크게 영향을 받는 중대형 액정 디스플레이에 절실히 필요하다. 또한 중대형 디스플레이에 FFS모드가 적용될 시 의도하지 않게 Cst가 증가하게 되고 Cst증가로 인해 발행되는 신호지연 때문에 투과율이 화소 위치별로 달라 화질이 떨어지는 문제가 발생한다.Recently, studies of optically isotropic liquid crystal displays have been actively researched at home and abroad in order to solve the problems of response speed and viewing angle, which are a chronic problem of liquid crystal displays using nematic liquid crystal displays. However, the previously developed optically isotropic liquid crystal display is applied to the device using only In-plane switching (IPS), which has weak electric field strength, so the driving voltage is very high above 100v and the driving temperature range is very low due to the number. Is still insufficient to commercialize. In addition, the liquid crystal display using optically isotropic liquid crystal is indispensable to the medium and large liquid crystal display which is greatly affected by the viewing angle dependency since its performance does not deteriorate compared to the CRT in view of the viewing angle dependency. In addition, when the FFS mode is applied to a medium-large display, the Cst increases unintentionally, and because of the signal delay issued due to the increase in Cst, the transmittance varies according to the pixel position, which causes a problem of deterioration in image quality.

따라서 본 발명에서는 광학적으로 등방성을 갖는 블루상 액정을 중대형 액정디스플레이에 응용시키면서 구동전압과 Cst를 낮추기 위해 전압을 인가하면 전기장 세기가 액정층에 강하게 걸리는 공통전극이 패턴된 FFS모드를 적용함으로써 구동전압이 수볼트를 갖는 액정표시장치를 제공하는 것이다.Therefore, in the present invention, when a blue phase liquid crystal having optically isotropy is applied to a medium-large liquid crystal display and a voltage is applied to lower the driving voltage and the Cst, the driving voltage is applied by applying a common electrode patterned FFS mode in which the electric field strength is strongly applied to the liquid crystal layer. It is to provide a liquid crystal display device having this male bolt.

상기한 목적을 달성하기 위해 본 발명은 광학적으로 등방성을 갖는 블루상 액정을 슬릿형태로 패턴된 공통전극과 화소전극이 오버랩 되는 영역을 최소화시킨 FFS 액정표시소자에 적용함으로써, 강한 프린지 전기장이 액정층에 인가되면서도 축적용량이 크게 발생하지 않는 중대형 액정디스플레이에 적용할 수 있는 액정표시소자를 제공한다.In order to achieve the above object, the present invention applies an optically isotropic blue liquid crystal to a FFS liquid crystal display device in which a region in which a slit patterned common electrode and a pixel electrode overlap is minimized, whereby a strong fringe electric field is generated. Provided is a liquid crystal display device that can be applied to a medium and large liquid crystal display that does not generate a large amount of storage capacity while being applied thereto.

본 발명은 전압인가 전에는 광학적으로 등방성의 특징을 갖는 액정을 사용하기 때문에 초기 어둠 상태일 때 입사 편광에 의존하지 않아 완벽한 어둠 상태를 나타내어 정면뿐만 아니라 시야각 방향에서의 CR값이 매우 높은 광시야각 액정표시소자를 제공할 수 있다.In the present invention, since a liquid crystal having optically isotropic characteristics is used before voltage is applied, it is not dependent on incident polarization in the initial dark state, and thus shows a perfect dark state, and thus a wide viewing angle liquid crystal display having a very high CR value in front and viewing angle directions. An element can be provided.

또한, 본 발명은 낮은 전압에서도 강한 전기장세기가 액정층에 걸리는 전극구조를 갖는 FFS모드를 사용하기 때문에 수볼트의 구동전압을 갖는 액정표시소자를 제공할 수 있다.In addition, the present invention can provide a liquid crystal display device having a driving voltage of several volts because the FFS mode having an electrode structure in which strong electric field strength is applied to the liquid crystal layer even at a low voltage is used.

또한, 본 발명은 FFS모드의 전극구조에 있어서, 공통전극의 모양을 슬릿형태로 패턴함으써, 상기 공통전극과 화소 전극이 오버랩되는 영역을 적절히 조절함으로써 Cst를 액정표시소자의 사이즈에 맞게 조절할 수 있다. In addition, in the FFS mode electrode structure, the Cst can be adjusted to the size of the liquid crystal display by appropriately adjusting a region where the common electrode and the pixel electrode overlap by patterning the shape of the common electrode in a slit form. have.

또한, 블루상 액정을 사용하기 때문에, 인가 전압에 따라 고속응답을 실현할 수있는 액정표시소자를 제공할 수 있다.In addition, since a blue phase liquid crystal is used, a liquid crystal display element capable of realizing a high-speed response in accordance with an applied voltage can be provided.

이하, 도면을 참조하여 본 발명의 실시예를 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

실시예 1Example 1

본 발명의 제 1실시예는 광학적으로 등방성의 특징을 갖는 액정을 이용한 공통전극이 슬릿형태로 패턴된 단일도메인 FFS액정표시소자이다. 도 1은 본 발명의 제 1 실시예에 따른 단일도메인 구조를 갖는 FFS 액정표시소자의 단위화소를 나타내는 평면도이다. 도시한 바와 같이, 투명 유리 기판 또는 플라스틱 기판 위에 첫 번째 층의 공통전극(1)을 단일도메인을 갖도록 한쪽방향으로 슬릿 형태로 형성시키고 게이트 전극 및 TFT 층, 절연막 층을 형성한 후 화소 전극(2)을 상기 공통전극(1)과 같은 방향으로 단일 도메인을 갖도록 한쪽 방향으로 슬릿형태로 형성한다. 상판은 총천연색을 구현하기 위해 red, blue, green색을 낼 수 있는 필터가 유리 또는 플라스틱 기판 위에 형성되어 있는 기판을 사용한다. A first embodiment of the present invention is a single domain FFS liquid crystal display device in which a common electrode using a liquid crystal having optically isotropic characteristics is patterned in a slit form. 1 is a plan view illustrating a unit pixel of an FFS liquid crystal display device having a single domain structure according to a first embodiment of the present invention. As shown in the drawing, the common electrode 1 of the first layer is formed on the transparent glass substrate or the plastic substrate in a slit form in one direction to have a single domain, the gate electrode, the TFT layer, and the insulating film layer are formed, and then the pixel electrode 2 is formed. ) Is formed in a slit shape in one direction to have a single domain in the same direction as the common electrode 1. The top plate uses a substrate in which a filter capable of producing red, blue, and green colors is formed on a glass or plastic substrate to realize full color.

이때, 픽셀전극에 전압인가시 발생되는 전기장방향과 두장의 편광판의 투과축중 하나는 45도 각을 이룬다.At this time, one of the electric field direction generated when the voltage is applied to the pixel electrode and the transmission axis of the two polarizing plates forms an angle of 45 degrees.

도 2는 도 1의 A~A'선으로 취한 단면도를 나태내고 있다. 상기 공통전극(1) 의 전극폭(w')과 전극간거리(l')는 각각 2~22um, 1~10um로 패턴하고, 상기 화소전극 (2)의 전극폭(w)과 전극간 거리(l)은 각각 1~10um, 1.5~15um가 되도록 패턴하고, 상기 공통전극과 화소전극이 겹치는 영역(g)은 4um이내가 되도록 패턴 한다. 2 is a cross-sectional view taken along the line AA 'of FIG. The electrode width w 'and the interelectrode distance l' of the common electrode 1 are patterned into 2 to 22 um and 1 to 10 um, respectively, and the electrode width w and the distance between electrodes of the pixel electrode 2 ( l) is patterned to be 1 to 10um and 1.5 to 15um, respectively, and the region g where the common electrode and the pixel electrode overlap is patterned to be within 4um.

도 3은 이중도메인 구조를 갖는 FFS 액정표시소자의 단위화소를 나타내는 평면도이다. 도시한 바와 같이, 투명 유리 기판 또는 플라스틱 기판 위에 첫 번째 층의 공통전극(1)을 이중도메인을 갖도록 양쪽방향으로 슬릿 형태로 형성시키고 게이트 전극 및 TFT 층, 절연막 층을 형성한 후 화소 전극(2)을 상기 공통전극과 같은 방향으로 이중 도메인을 갖도록 양쪽 방향으로 슬릿형태로 형성한다. 상판은 총천연색을 구현하기 위해 red, blue, green색을 낼 수 있는 필터가 유리 또는 플라스틱 기판 위에 형성되어 있는 기판을 사용한다. 상기 공통전극(1)의 전극폭(w')과 전극간거리(l'), 상기 화소전극(2)의 전극폭(w)과 전극간 거리(l)와, 상기 공통전극과 화소전극이 겹치는 영역(g)은 도2와 같이 패턴 한다. 3 is a plan view illustrating a unit pixel of an FFS liquid crystal display device having a dual domain structure. As shown in the drawing, the common electrode 1 of the first layer is formed on the transparent glass substrate or the plastic substrate in a slit shape in both directions to have a double domain, and the gate electrode, the TFT layer, and the insulating film layer are formed. ) Is formed in a slit in both directions to have a double domain in the same direction as the common electrode. The top plate uses a substrate in which a filter capable of producing red, blue, and green colors is formed on a glass or plastic substrate to realize full color. An electrode width w 'and an interelectrode distance l' of the common electrode 1, an electrode width w and an interelectrode distance l of the pixel electrode 2, and the common electrode and the pixel electrode overlap each other. The region g is patterned as shown in FIG.

이때, 픽셀전극에 전압인가시 발생되는 전기장방향과 두장의 편광판의 투과축중 하나는 45도 각을 이룬다.At this time, one of the electric field direction generated when the voltage is applied to the pixel electrode and the transmission axis of the two polarizing plates forms an angle of 45 degrees.

상기 도 1과 도3과 같은 전극 구조를 같은 FFS 액정표시소자는 Cst값을 기판사이즈에 맞게 조절이 가능하다.The FFS liquid crystal display device having the same electrode structure as in FIGS. 1 and 3 can adjust the Cst value according to the substrate size.

또한, 배향을 필요로 하지 않는 블루상 액정을 사용하기 때문에 배향막을 코팅하지않는다. 다만 전극을 보호할 목적으로 PI배향막이나 또 다른 유기 박막을 사용할 수 있다.In addition, since the blue liquid crystal which does not require alignment is used, the alignment film is not coated. However, a PI alignment film or another organic thin film may be used to protect the electrode.

상기 구성에 있어서, 광학적으로 등방성 특징을 갖는 액정층의 한 예로 1mg 를 만들기 위해 표 1과 같이 혼합 모노머를 함유율에 맞게 제조가 가능하다.In the above configuration, in order to make 1 mg as an example of the liquid crystal layer having optically isotropic characteristics, it is possible to manufacture a mixed monomer according to the content ratio as shown in Table 1.

[표 1] TABLE 1

Figure 112008085949805-PAT00001
Figure 112008085949805-PAT00001

상기 구성에 있어서, 광학적으로 등방성 특징을 갖는 액정층의 또다른 예 2mg를 만들기 위해 표 2과 같이 혼합 모노머를 함유율에 맞게 제조가 가능하다.In the above configuration, in order to make another 2 mg of the liquid crystal layer having optically isotropic characteristics, it is possible to manufacture a mixed monomer according to the content as shown in Table 2.

[표 2]TABLE 2

Figure 112008085949805-PAT00002
Figure 112008085949805-PAT00002

상기 표 1, 2의 혼합모노머중 액정혼합물은 서로 다른 액정단량체들이 혼합된 구조로 되어 있어 그 물성이 서로 다르다.The liquid crystal mixture of the mixed monomers of Tables 1 and 2 has a structure in which different liquid crystal monomers are mixed, and thus, their physical properties are different.

카이랄 도펀트(chiral dopant) ZLI-4572Chiral dopant ZLI-4572

Figure 112008085949805-PAT00003
Figure 112008085949805-PAT00003

카이랄 도펀트(chiral dopant) CB-15Chiral dopant CB-15

Figure 112008085949805-PAT00004
Figure 112008085949805-PAT00004

모노머 RM-257Monomer RM-257

Figure 112008085949805-PAT00005
Figure 112008085949805-PAT00005

모노머 EHA (2-Ethylhexyl Acrylate)Monomer EHA (2-Ethylhexyl Acrylate)

Figure 112008085949805-PAT00006
Figure 112008085949805-PAT00006

광 개시제(Trimethylopropane triacrylate) Photoinitiator (Trimethylopropane triacrylate)

Figure 112008085949805-PAT00007
Figure 112008085949805-PAT00007

도 1은 본 발명의 제 1 실시예에 따른 단일도메인 구조를 갖는 FFS 액정표시소자의 단위화소를 나타내는 평면도 1 is a plan view showing a unit pixel of an FFS liquid crystal display device having a single domain structure according to a first embodiment of the present invention.

도 2는 도 1의 단면도(A~A')FIG. 2 is a cross-sectional view taken along line A ′ of FIG. 1.

도 3은 이중도메인 구조를 갖는 FFS 액정표시소자의 단위화소를 나타내는 평면도 3 is a plan view showing a unit pixel of an FFS liquid crystal display device having a dual domain structure;

Claims (4)

프린지 필드 스위칭 액정표시소자에 있어서, A fringe field switching liquid crystal display device, 투명 유리 기판 또는 플라스틱 기판을 사용하는 하부기판과;A lower substrate using a transparent glass substrate or a plastic substrate; 상기 하부기판 상부에 투명한 공통 전극이 슬릿 형태로 형성되어 있는 것과;A transparent common electrode formed on the lower substrate in a slit shape; 절연층을 사이에 두고 상기 공통전극 상부에 위치한 슬릿 형태의 화소 전극이 형성되어 있는것과;A slit pixel electrode formed on the common electrode with an insulating layer interposed therebetween; 상기 공통전극의 전극간거리를 상기 화소전극의 전극폭보다 작게 패턴하여, 화소 전극에 연결된 박막 트지스터를 통해 전압을 인가하며, 패턴된 공통전극과 화소 전극 간에 프린지 필드 전기장이 형성되게 하고,The inter-electrode distance of the common electrode is patterned smaller than the electrode width of the pixel electrode to apply a voltage through a thin film transistor connected to the pixel electrode, thereby forming a fringe field electric field between the patterned common electrode and the pixel electrode. 상기 화소전극 상부에 위치한 액정층은 초기 광학적으로 등방성의 특징을 가지고 있고 전압 인가에 의해 광학적 이방성의 특징을 갖는 것과;The liquid crystal layer positioned above the pixel electrode has an initial optically isotropic characteristic and an optical anisotropy by voltage application; 상기 액정층 상부에 위치한 상부 투명기판과;An upper transparent substrate positioned above the liquid crystal layer; 상기 상, 하부 양쪽기판에 배향막이 코팅되어 있지않은 것과;The upper and lower both substrates are not coated with an alignment layer; 상기 공통전극의 전극 폭과 전극 간 거리는 각각 2~22um, 1~10um로 패턴하고, 상기 화소전극의 전극 폭과 전극간 거리는 각각 1~10um, 1.5~15um가 되도록 패턴하고, 상기 공통전극과 화소전극이 겹치는 영역은 4um이내로 형성하는 것과;The electrode width and the distance between the electrodes of the common electrode are patterned at 2 to 22 um and 1 to 10 um, respectively, and the electrode width and the distance between the electrodes are patterned to be 1 to 10 um and 1.5 to 15 um, respectively, and the common electrode and the pixel are patterned. The overlapping regions of the electrodes are formed within 4 μm; 상, 하판에 투과축이 교차된 편광판을 사용하는것과;Using a polarizing plate having a transmission axis crossed on the upper and lower plates; 광학적으로 등방성의 특징을 갖는 블루상 액정을 이용한 프린지 필드 스위칭 액정 표시 소자Fringe field switching liquid crystal display device using a blue phase liquid crystal having optically isotropic characteristics 제 1항에 있어서, The method of claim 1, 상기 슬릿형태로 패턴된 공통전극과 화소전극이 이중도메인을 갖도록 패턴된 광학적으로 등방성의 특징을 갖는 블루상 액정을 이용한 프린지 필드 스위칭 액정 표시 소자Fringe field switching liquid crystal display device using a blue phase liquid crystal having an optically isotropic characteristic patterned such that the common electrode and the pixel electrode patterned in the slit form have a double domain 제 1항이나 2항에 있어서, The method according to claim 1 or 2, 상기 공통전극의 슬릿 형태의 패턴을 일부 영역에만 형성시키는 광학적으로 등방성의 특징을 갖는 블루상 액정을 이용한 프린지 필드 스위칭 액정 표시 소자Fringe field switching liquid crystal display device using a blue phase liquid crystal having an optically isotropic characteristic of forming a slit pattern of the common electrode only in a partial region 제 1항, 제2항, 제3항 중 어느 한 항 있어서, The method according to any one of claims 1, 2, 3, 상기 하부기판에 코팅되어있는 상기 화소전극를 보호하기 위한 목적으로 상부 화소전극 상부에만 배향막이나 투명한 유기박막이 코팅되어있는 광학적으로 등방성의 특징을 갖는 블루상 액정을 이용한 프린지 필드 스위칭 액정 표시 소자A fringe field switching liquid crystal display device using a blue liquid crystal having an optically isotropic property in which an alignment film or a transparent organic thin film is coated only on an upper pixel electrode to protect the pixel electrode coated on the lower substrate.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8593605B2 (en) 2011-02-24 2013-11-26 Samsung Display Co., Ltd. Liquid crystal display
US9366890B2 (en) 2013-02-12 2016-06-14 Samsung Display Co., Ltd. Liquid crystal display
US9759963B2 (en) 2013-09-12 2017-09-12 Samsung Display Co., Ltd. Liquid crystal display
WO2021184186A1 (en) * 2020-03-17 2021-09-23 京东方科技集团股份有限公司 Array substrate and display device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8593605B2 (en) 2011-02-24 2013-11-26 Samsung Display Co., Ltd. Liquid crystal display
US8854588B2 (en) 2011-02-24 2014-10-07 Samsung Display Co., Ltd. Liquid crystal display
US9366890B2 (en) 2013-02-12 2016-06-14 Samsung Display Co., Ltd. Liquid crystal display
US9798197B2 (en) 2013-02-12 2017-10-24 Samsung Display Co., Ltd. Liquid crystal display
US9817283B2 (en) 2013-02-12 2017-11-14 Samsung Display Co., Ltd. Liquid crystal display
US9759963B2 (en) 2013-09-12 2017-09-12 Samsung Display Co., Ltd. Liquid crystal display
WO2021184186A1 (en) * 2020-03-17 2021-09-23 京东方科技集团股份有限公司 Array substrate and display device
US11846856B2 (en) 2020-03-17 2023-12-19 Beijing Boe Display Technology Co., Ltd. Array substrate and display device

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