KR19990033653A - Transverse electric field liquid crystal display device - Google Patents
Transverse electric field liquid crystal display device Download PDFInfo
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- KR19990033653A KR19990033653A KR1019970055069A KR19970055069A KR19990033653A KR 19990033653 A KR19990033653 A KR 19990033653A KR 1019970055069 A KR1019970055069 A KR 1019970055069A KR 19970055069 A KR19970055069 A KR 19970055069A KR 19990033653 A KR19990033653 A KR 19990033653A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 43
- 230000005684 electric field Effects 0.000 title claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 46
- 239000010409 thin film Substances 0.000 claims abstract description 24
- 230000010287 polarization Effects 0.000 claims abstract description 21
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000002834 transmittance Methods 0.000 description 7
- 239000010408 film Substances 0.000 description 6
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 229910004205 SiNX Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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Abstract
본 발명에 따른 횡전계방식 액정표시소자는 칼라필터기판 및 박막트랜지스터기판과, 상기 칼라필터기판과 박막트랜지스터기판 사이의 액정층과, 상기 액정층의 액정방향자의 방향과 직교하는 편광방향을 갖는 상기 박막트랜지스터기판에 부착된 제1편광판과, 상기 제1편광판의 편광방향과 직교하는 편광방향을 갖는 상기 칼라필터기판에 부착된 제2편광판으로 이루어진다.A transverse electric field liquid crystal display device according to the present invention includes a color filter substrate and a thin film transistor substrate, a liquid crystal layer between the color filter substrate and a thin film transistor substrate, and a polarization direction orthogonal to the direction of the liquid crystal director of the liquid crystal layer. A first polarizing plate attached to the thin film transistor substrate and a second polarizing plate attached to the color filter substrate having a polarization direction orthogonal to the polarization direction of the first polarizing plate.
Description
본 발명은 횡전계방식 액정표시소자에 관한 것으로, 특히, 한쌍의 편광자의 편광방향과 액정방향자의 방향을 적절하게 배치하는 것에 의해 광투과율을 향상시킨 횡전계방식 액정표시소자에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transverse electric field type liquid crystal display device, and more particularly to a transverse electric field type liquid crystal display device having improved light transmittance by appropriately disposing a polarization direction of a pair of polarizers and a liquid crystal director direction.
일반적으로 횡전계방식의 액정표시소자는 개구율이 작다는 단점에도 불구하고 광학적으로 시야각특성이 매우 우수할 뿐만 아니라, 색변환도 매우 적은 것으로 알려져 있다.In general, a transverse electric field type liquid crystal display device is known to not only have excellent optical viewing angle characteristics but also have very few color conversions despite the disadvantage of small aperture ratio.
도 1은 일반적인 횡전계방식 액정표시소자의 단위화소의 평면도로서, 도면에 나타낸 바와 같이, 제1기판 위에 배열되어 화소영역을 정의하는 데이터배선(1) 및 게이트배선(2)과, 상기한 게이트배선(2)과 평행하게 화소내에 배열된 공통배선(5)과, 상기한 게이트배선(2)과 데이터배선(1)의 교차점에 배치된 박막트랜지스터와, 상기한 화소내에 데이터배선(1)과 대략 평행하게 배열된 데이터전극(19) 및 공통전극(11)으로 구성된다.FIG. 1 is a plan view of a unit pixel of a general transverse electric field type liquid crystal display device. As shown in the drawing, data wiring 1 and gate wiring 2 arranged on a first substrate to define a pixel region, and the gate described above. A common wiring 5 arranged in a pixel parallel to the wiring 2, a thin film transistor arranged at an intersection point of the gate wiring 2 and the data wiring 1, and the data wiring 1 in the pixel. The data electrode 19 and the common electrode 11 are arranged in substantially parallel.
박막트랜지스터는 제1기판(미도시) 위에 형성되어 상기 게이트배선(2)과 접속되는 게이트전극(10)과, 상기 게이트전극(10) 위에 적층된 SiNx 또는 SiOx와 같은 물질로 이루어진 게이트절연막(미도시)과, 상기 게이트절연막 위에 형성된 비정질실리콘층(미도시)과, 상기 비정질실리콘층 위에 형성된 불순물비정질실리콘층(미도시)과, 상기한 불순물비정질실리콘층 위에 형성되어 데이터배선(1)과 데이터전극(19)에 각각 접속되는 소스전극(17) 및 드레인전극(18)으로 구성된다. 화소내의 공통전극(11)은 제1기판 위에 형성되어 공통배선에 접속되며 데이터전극(19)은 게이트절연막 위에 형성되어 박막트랜지스터의 드레인전극(18)에 접속된다. 박막트랜지스터, 데이터전극(19) 및 게이트절연막 위에는 SiNx 또는 SiOx와 같은 물질로 이루어진 보호막(미도시)이 기판 전체에 걸쳐 적층되어 있으며, 그 위에 제1배향막(미도시)이 도포되고 배향방향이 결정된다.The thin film transistor is formed on a first substrate (not shown), and includes a gate electrode 10 connected to the gate wiring 2 and a gate insulating film made of a material such as SiNx or SiOx stacked on the gate electrode 10. And an impurity amorphous silicon layer (not shown) formed on the gate insulating film, an impurity amorphous silicon layer (not shown) formed on the amorphous silicon layer, and the impurity amorphous silicon layer formed above the data wiring (1) and data. It consists of the source electrode 17 and the drain electrode 18 connected to the electrode 19, respectively. The common electrode 11 in the pixel is formed on the first substrate and connected to the common wiring, and the data electrode 19 is formed on the gate insulating film and connected to the drain electrode 18 of the thin film transistor. On the thin film transistor, the data electrode 19 and the gate insulating film, a protective film (not shown) made of a material such as SiNx or SiOx is stacked over the substrate, and a first alignment film (not shown) is applied thereon, and an orientation direction is determined. do.
또한, 상기한 제1기판과 대응하는 제2기판(미도시) 위에는 빛의 누설을 방지하는 차광층(미도시), R, G 및 B의 칼라필터소자로 이루어진 칼라필터층(미도시) 및 오버코트층(미도시)이 차례로 적층되어 있다.Further, on the second substrate corresponding to the first substrate (not shown), a light shielding layer (not shown) for preventing light leakage, a color filter layer (not shown) and an overcoat made of color filter elements of R, G, and B Layers (not shown) are stacked in sequence.
도 2는 횡전계를 형성하는 한쌍의 전극(데이터전극(19), 공통전극(11))과 그것에 의해 구동되는 액정분자(20)를 나타내는 도면으로서, 액정층에 전압이 인가되면 액정분자(20)는 전계의 영향을 받아 평균적으로 약 45°정도 회전하게 된다.FIG. 2 is a diagram showing a pair of electrodes (data electrode 19, common electrode 11) and liquid crystal molecules 20 driven by the pair of electrodes forming the transverse electric field. When voltage is applied to the liquid crystal layer, the liquid crystal molecules 20 ) Is rotated about 45 ° on average under the influence of the electric field.
도 3은 종래 횡전계방식 액정표시소자의 개략적인 분해 사시도로서, 도면에 나타내듯이, 칼라필터기판(120) 및 박막트랜지스터기판(121)과, 상기 칼라필터기판(120)과 박막트랜지스터기판(121) 사이에서 공통전극(111)과 데이터전극(119)에 의한 횡전계에 의해 구동되는 액정(130)과, 상기 액정(130)의 액정방향자의 방향과 평행한 편광방향을 갖는 상기 박막트랜지스터기판에 부착된 제1편광판(123)과, 상기 제1편광판(123)의 편광방향과 직교하는 편광방향을 갖는 상기 칼라필터기판(120)에 부착된 제2편광판(125)으로 이루어진다. 도면에서 기판(123) 아래의 빗금친 화살표는 백라이트(미도시)로부터의 입사광을 나타낸다.3 is a schematic exploded perspective view of a conventional transverse electric field type liquid crystal display device, and as shown in the drawing, a color filter substrate 120 and a thin film transistor substrate 121, the color filter substrate 120 and a thin film transistor substrate 121. ) Between the liquid crystal 130 driven by the transverse electric field by the common electrode 111 and the data electrode 119, and the thin film transistor substrate having a polarization direction parallel to the direction of the liquid crystal director of the liquid crystal 130. And a second polarizing plate 125 attached to the color filter substrate 120 having a polarization direction orthogonal to the polarization direction of the first polarizing plate 123. The hatched arrows below the substrate 123 in the figure represent incident light from a backlight (not shown).
본 발명은 빛의 투과여부를 결정하는 한쌍의 편광판 중 박막트랜지스터기판에 부착된 편광판의 편광방향을 액정방향자의 방향과 직교시키고, 칼라필터기판에 부착된 편광판의 편광방향을 액정방향자의 방향과 평행하게 하여 광투과율을 향상시킨 횡전계방식 액정표시소자를 제공하는 것을 목적으로 한다.According to the present invention, the polarization direction of the polarizing plate attached to the thin film transistor substrate is orthogonal to the direction of the liquid crystal director, and the polarization direction of the polarizing plate attached to the color filter substrate is parallel to the liquid crystal director direction. It is an object of the present invention to provide a transverse electric field type liquid crystal display device having improved light transmittance.
상기한 목적을 달성하기 위하여 본 발명에 따른 횡전계방식 액정표시소자는 칼라필터기판 및 박막트랜지스터기판과, 상기 칼라필터기판과 박막트랜지스터기판 사이에서 공통전극과 데이터전극에 의한 횡전계에 의해 구동되는 액정과, 상기 액정의 액정방향자의 방향과 직교하는 편광방향을 갖는 상기 박막트랜지스터기판에 부착된 제1편광판과, 상기 제1편광판 편광방향과 직교하는 편광방향을 갖는 상기 칼라필터기판에 부착된 제2편광판으로 이루어진다.In order to achieve the above object, a transverse electric field type liquid crystal display device according to the present invention is driven by a transverse electric field by a common electrode and a data electrode between a color filter substrate and a thin film transistor substrate and the color filter substrate and a thin film transistor substrate. A first polarizing plate attached to the thin film transistor substrate having a liquid crystal, a polarization direction orthogonal to the direction of the liquid crystal director of the liquid crystal, and a second attached to the color filter substrate having a polarization direction orthogonal to the polarization direction of the first polarizing plate It consists of two polarizing plates.
도 1은, 일반적인 횡전계방식 액정표시소자의 평면도.1 is a plan view of a general transverse electric field type liquid crystal display device.
도 2는, 한쌍의 전극 사이에서 액정의 배열 상태를 나타내는 도면.2 is a diagram illustrating an arrangement state of liquid crystals between a pair of electrodes.
도 3은, 종래 횡전계방식 액정표시소자의 개략적인 분해 사시도.3 is a schematic exploded perspective view of a conventional transverse electric field type liquid crystal display device.
도 4는, 본 발명에 따른 횡전계방식 액정표시소자의 개략적인 분해 사시도.4 is a schematic exploded perspective view of a transverse electric field type liquid crystal display device according to the present invention.
도 5는, 본 발명에 따른 횡전계방식 액정표시소자의 투과도와 전압과의 관계를 나타내는 그래프.5 is a graph showing the relationship between the transmittance and the voltage of the transverse electric field liquid crystal display device according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for main parts of the drawings>
111 : 공통전극 119 : 데이터전극111: common electrode 119: data electrode
120 : 칼라필터기판 121 : 박막트랜지스터기판120: color filter substrate 121: thin film transistor substrate
123 : 제2편광판 125 : 제1편광판123: second polarizing plate 125: first polarizing plate
130 : 액정130: liquid crystal
이하, 본 발명의 바람직한 실시예를 도면을 참조하여 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
후술하는 도면의 각 부호는 상기한 구성요소에 동일하게 적용된다.Each reference numeral in the drawings to be described later applies equally to the above components.
도 4는 본 발명에 따른 횡전계방식 액정표시소자의 개략적인 분해 사시도로서, 도면에 나타내듯이, 칼라필터기판(120) 및 박막트랜지스터기판(121)과, 상기 칼라필터기판(120)과 박막트랜지스터기판(121) 사이에서 공통전극(111)과 데이터전극(119)에 의한 횡전계에 의해 구동되는 액정(130)과, 상기 액정(130)의 액정방향자의 방향과 직교하는 편광방향을 갖는 상기 박막트랜지스터기판에 부착된 제1편광판(123)과, 상기 제1편광판(123)의 편광방향과 직교하는 편광방향을 갖는 상기 칼라필터기판(120)에 부착된 제2편광판(125)으로 이루어진다. 도면에서 기판(123) 아래의 빗금친 화살표는 백라이트(미도시)광을 나타낸다.4 is a schematic exploded perspective view of a transverse electric field type liquid crystal display device according to the present invention. As shown in the drawing, a color filter substrate 120 and a thin film transistor substrate 121, the color filter substrate 120 and a thin film transistor are shown. The thin film having a polarization direction orthogonal to the direction of the liquid crystal director of the liquid crystal 130 driven by the transverse electric field by the common electrode 111 and the data electrode 119 between the substrate 121. A first polarizing plate 123 attached to the transistor substrate and a second polarizing plate 125 attached to the color filter substrate 120 having a polarization direction orthogonal to the polarization direction of the first polarizing plate 123. In the figure, hatched arrows below the substrate 123 indicate backlight (not shown) light.
도 5는 본 발명과 종래 기술에서 투과도와 전압과의 관계를 나타내는 비교그래프로서, 도면에서 A는 본 발명에 따른 횡전계방식 액정표시소자의 특성을 나타내고 있으며, B는 종래 횡전계방식 액정표시소자의 특성을 나타내고 있다.5 is a comparative graph showing the relationship between the transmittance and the voltage in the present invention and the prior art, in which A represents the characteristics of the transverse electric field liquid crystal display device according to the present invention, and B is the conventional transverse electric field liquid crystal display device. The characteristics of
도면에서 알 수 있듯이, 빛이 입사하는 쪽의 편광판의 편광방향을 액정방향자의 방향과 수직하게 하였을 경우의 투과도는, 편광판의 편광방향을 액정방향자의 방향과 평행하게 하였을 경우의 투과도에 비하여 우수함을 알 수 있다.As can be seen from the figure, the transmittance when the polarization direction of the polarizing plate on which light is incident is perpendicular to the direction of the liquid crystal director is superior to the transmittance when the polarization direction of the polarizing plate is parallel to the direction of the liquid crystal director. Able to know.
본 발명에 따른 횡전계방식 액정표시소자는, 박막트랜지스터기판에 부착된 편광판의 편광방향을 액정방향자의 방향과 직교시키고, 칼라필터기판에 부착된 편광판의 편광방향을 액정방향자의 방향과 평행하게 하는 것에 의해 광투과율을 향상시키는 것이 가능하다.In the transverse electric field type liquid crystal display device according to the present invention, the polarization direction of the polarizing plate attached to the thin film transistor substrate is orthogonal to the direction of the liquid crystal director, and the polarization direction of the polarizing plate attached to the color filter substrate is parallel to the direction of the liquid crystal director. It is possible to improve light transmittance by this.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970055069A KR19990033653A (en) | 1997-10-25 | 1997-10-25 | Transverse electric field liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019970055069A KR19990033653A (en) | 1997-10-25 | 1997-10-25 | Transverse electric field liquid crystal display device |
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| KR19990033653A true KR19990033653A (en) | 1999-05-15 |
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| KR1019970055069A Ceased KR19990033653A (en) | 1997-10-25 | 1997-10-25 | Transverse electric field liquid crystal display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030029515A (en) * | 2001-10-08 | 2003-04-14 | 보스 게엠베하 운트 코. 카게 | Lamella and lamellar curtain constructed therefrom |
| US7038894B2 (en) | 1999-09-16 | 2006-05-02 | Kabushiki Kaisha Toshiba | Magnetoresistive element and magnetic memory device |
-
1997
- 1997-10-25 KR KR1019970055069A patent/KR19990033653A/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7038894B2 (en) | 1999-09-16 | 2006-05-02 | Kabushiki Kaisha Toshiba | Magnetoresistive element and magnetic memory device |
| KR20030029515A (en) * | 2001-10-08 | 2003-04-14 | 보스 게엠베하 운트 코. 카게 | Lamella and lamellar curtain constructed therefrom |
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