KR20000014703A - Liquid crystal orientation device - Google Patents
Liquid crystal orientation device Download PDFInfo
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- KR20000014703A KR20000014703A KR1019980034247A KR19980034247A KR20000014703A KR 20000014703 A KR20000014703 A KR 20000014703A KR 1019980034247 A KR1019980034247 A KR 1019980034247A KR 19980034247 A KR19980034247 A KR 19980034247A KR 20000014703 A KR20000014703 A KR 20000014703A
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- liquid crystal
- vertical axis
- bridge
- rubbing
- roller
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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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
-
- 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
- G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
- G02F1/133757—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different alignment orientations
Abstract
Description
본 발명은 액정 배향 장치에 관한 것으로, 보다 구체적으로는, 여러번의 러빙 공정없이도 멀티 도메인을 형성할 수 있는 액정 배향 장치에 관한 것이다.TECHNICAL FIELD This invention relates to a liquid crystal aligning apparatus. More specifically, It is related with the liquid crystal aligning apparatus which can form a multi-domain without several rubbing processes.
일반적으로, 액정 표시 장치는 대향하는 상하부 기판과, 상하부 기판 사이에 개재되는 액정을 포함한다. 여기서, 상하부 기판의 대향면 각각에는 액정 구동 전극과, 배향막이 형성된다.In general, the liquid crystal display device includes an upper and lower substrate facing each other and a liquid crystal interposed between the upper and lower substrates. Here, a liquid crystal drive electrode and an alignment film are formed in each of the opposing surfaces of the upper and lower substrates.
배향막은 일종의 레진막으로서, 액정 분자의 초기 배열방향을 결정하는 역할을 한다. 이때, 배향막은 액정 분자들을 일정한 방향으로 배열시키기 위하여, 러빙 공정을 실시한다.The alignment film is a kind of resin film that determines the initial alignment direction of the liquid crystal molecules. At this time, the alignment layer performs a rubbing process to align the liquid crystal molecules in a predetermined direction.
여기서, 종래의 러빙 공정은 도 1에 도시된 바와 같이, 배향막(1)상에 러빙포가 감싸여진 로울러(10)를 예정된 러빙 방향(R1)으로 문지름으로써, 달성된다. 여기서, R2는 로울러의 회전 방향을 나타낸다.Here, the conventional rubbing process is achieved by rubbing the roller 10 in which the rubbing cloth is wrapped on the alignment film 1 in the predetermined rubbing direction R1, as shown in FIG. Here, R2 represents the rotation direction of the roller.
또한, 현재의 액정 표시 장치는, 넓은 시야각을 확보하면서 화이트 상태시 컬러 쉬프트 현상을 방지하기 위하여, 하나의 단위 화소 공간을 수개로 분할하여, 서로 대칭적인 방향으로 러빙하는 멀티 도메인 방식이 제안되었다.In addition, in the current liquid crystal display, in order to prevent a color shift phenomenon in a white state while securing a wide viewing angle, a multi-domain method of dividing one unit pixel space into several and rubbing in a symmetrical direction has been proposed.
이러한 멀티 도메인은 상술한 러빙 공정에 의하여 형성되는데, 도 2에 도시된 바와 같이, 예를들어, 4-도메인을 형성할 경우에는, 배향막(1)을 제 1 방향(r1)으로 전체적으로 러빙한다. 그후, 배향막(1)의 제 2 영역(a2) 영역만이 노출되도록 제 1 포토레지스트 패턴(도시되지 않음)을 형성하고, 노출된 배향막(1)의 제 2 영역(a2)을 제 2 방향(r2)으로 러빙한다. 그다음으로, 제 1 포토레지스트 패턴을 제거한후, 배향막(1)의 제 3 영역(a3)이 노출되도록 제 2 포토레지스트 패턴(도시되지 않음)을 형성한다음, 노출된 배향막(1)의 제 3 영역(a3)을 제 3 방향(r3)으로 러빙한다. 이어, 제 2 포토레지스트 패턴을 제거한후, 배향막(1)의 제 4 영역(a4)이 노출되도록 제 3 포토레지스트 패턴(도시되지 않음)을 형성한다음, 노출된 배향막(1)의 제 4 영역(a4)을 제 4 방향(r4)으로 러빙한다. 그후, 제 3 포토레지스트 패턴을 제거함으로써, 단위 화소내에 멀티 도메인이 형성된다.The multi-domain is formed by the above-described rubbing process. As shown in FIG. 2, for example, when forming a four-domain, the alignment film 1 is entirely rubbed in the first direction r1. Thereafter, a first photoresist pattern (not shown) is formed to expose only the second region a2 of the alignment layer 1, and the second region a2 of the alignment layer 1 is exposed in a second direction ( r2). Next, after removing the first photoresist pattern, a second photoresist pattern (not shown) is formed such that the third region a3 of the alignment layer 1 is exposed, and then the third of the exposed alignment layer 1 is exposed. The region a3 is rubbed in the third direction r3. Subsequently, after the second photoresist pattern is removed, a third photoresist pattern (not shown) is formed to expose the fourth region a4 of the alignment layer 1, and then the fourth region of the exposed alignment layer 1 is formed. Rub (a4) in a 4th direction r4. Thereafter, by removing the third photoresist pattern, multi-domains are formed in the unit pixel.
그러나, 상기한 단위 화소 공간내에 멀티 도메인을 형성하는 방법은, 여러번의 러빙 공정과, 여러번의 포토리소그라피 공정을 실시하여야 하므로, 공정이 매우 복잡해져서, 액정 표시 장치를 제작하는데 있어서, 높은 제조 비용이 요구된다.However, the method of forming the multi-domain in the unit pixel space described above requires several rubbing steps and several photolithography steps, and thus, the process becomes very complicated. Required.
따라서, 본 발명의 목적은 상술한 종래의 문제점을 해결하기 위한 것으로, 단일의 러빙 공정으로 멀티 도메인을 형성하므로써, 제조 비용을 절감하고, 시야각을 넓힐 수 있는 액정 배향 장치를 제공하는 것이다.Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and to provide a liquid crystal alignment device capable of reducing manufacturing costs and widening the viewing angle by forming a multi-domain in a single rubbing process.
도 1은 종래의 액정 배향 장치를 나타낸 도면.1 is a view showing a conventional liquid crystal alignment device.
도 2는 종래의 멀티 도메인 형성방법을 설명하기 위한 도면.2 is a view for explaining a conventional multi-domain forming method.
도 3은 본 발명에 따른 액정 배향막의 평면도.3 is a plan view of a liquid crystal alignment film according to the present invention.
도 4는 본 발명에 따른 액정 배향 장치를 나타낸 도면.4 is a view showing a liquid crystal alignment device according to the present invention.
(도면의 주요 부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)
11 - 배향막 20 - 액정 배향 장치11-alignment film 20-liquid crystal alignment device
21 - 브릿지 22 - 수직축21-Bridge 22-Vertical Axis
23 - 브라켓 24 - 수평축23-Bracket 24-Horizontal Axis
25 - 로울러25-Roller
상기한 본 발명의 목적을 달성하기 위하여, 본 발명은, 배향막에 원형 또는 원호 형태의 러빙축을 갖도록 러빙하기 위한 장치로서, 브릿지와, 상기 브릿지 하부를 향해 설치된 수개의 수직축과, 상기 수직축에 회전가능하게 연결된 브래킷과, 상기 각 브래킷의 양측 내벽 사이에 연결된 수평축과, 상기 수평축에 회전가능하게 끼워진 로울러, 및 상기 수직축의 소정 부분에 수직축이 360도 회전가능하도록 동력을 제공하는 모터가 설치되며, 상기 로울러는 모터에 의해 동력을 전달받아, 배향막상에서 90도 이상 360도 이하로 회전되어, 배향막이 원호 또는 원형으로 배향되도록 하는 것을 특징으로 한다.In order to achieve the above object of the present invention, the present invention is a device for rubbing to have a rubbing axis of circular or arc shape on the alignment film, a bridge, several vertical axis provided toward the lower portion of the bridge, and rotatable on the vertical axis A bracket connected to each other, a horizontal shaft connected between both inner walls of each bracket, a roller rotatably fitted to the horizontal shaft, and a motor configured to provide a power to rotate the vertical shaft 360 degrees to a predetermined portion of the vertical shaft. The roller is powered by a motor, and is rotated by more than 90 degrees or less than 360 degrees on the alignment film, so that the alignment film is oriented in an arc or circle.
본 발명에 의하면, 종래에 사용되던 로울러를 다수개 연결하고, 로울러를 360도 회전되도록 하므로써, 배향막을 원형 형태로 러빙한다. 그러면, 액정 분자들은 배향막의 원형 러빙축을 따라 초기 배향되므로, 여러번의 러빙 공정 및 리소그라피 공정없이 멀티 도메인을 형성할 수 있다.According to the present invention, the alignment film is rubbed in a circular shape by connecting a plurality of rollers conventionally used and rotating the rollers 360 degrees. Then, since the liquid crystal molecules are initially oriented along the circular rubbing axis of the alignment layer, multi-domains may be formed without several rubbing processes and lithography processes.
(실시예)(Example)
이하 첨부한 도면에 의거하여 본 발명의 바람직한 실시예를 자세히 설명하도록 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
첨부한 도면 도 3은 본 발명에 따른 액정 표시 장치의 배향막의 평면도이고, 도 4는 본 발명에 따른 액정 배향 장치를 나타낸 도면이다.3 is a plan view of an alignment layer of the liquid crystal display according to the present invention, and FIG. 4 is a view showing the liquid crystal alignment device according to the present invention.
도 3에 도시된 바와 같이, 본 발명에서는 여러번의 러빙 공정없이, 단일의 공정으로 멀티 도메인을 형성하기 위하여, 배향막(11)의 러빙축(R)이 원형 방향을 취하도록 러빙한다. 그러면, 액정 분자(도시되지 않음)들은 그것의 장축이 원형을 이루도록 배열되므로, 이후 전극(도시되지 않음)간의 전계 형성시, 대칭적으로 액정 분자들이 움직이게 되어, 컬러 쉬프트(color shift), 그레이 스케일 인버젼(gray scale inversion) 현상이 발생되지 않는다.As shown in FIG. 3, in the present invention, the rubbing axis R of the alignment layer 11 is rubbed in a circular direction in order to form a multi-domain in a single process without multiple rubbing processes. Then, the liquid crystal molecules (not shown) are arranged such that their major axis is circular, so that upon formation of an electric field between the electrodes (not shown), the liquid crystal molecules are symmetrically moved, thus causing color shift, gray scale. Gray scale inversion does not occur.
이와같이, 배향막을 원형 형상으로 러빙하기 위하여는 도 4에 도시된 바와 같은 러빙 장치에 의하여 러빙한다.In this way, in order to rub an alignment film in a circular shape, it rubs with the rubbing apparatus as shown in FIG.
즉, 도면에서와 같이, 본 발명의 러빙 장치(20)는 브릿지(21)와, 상기 브릿지(21)에 하부를 향해 설치된 수개의 수직축(22)과, 상기 수직축에 회전 가능하게 연결된 브래킷(23)과, 상기 각 브래킷의 양측 내벽 사이에 연결된 수평축(24)과, 상기 수평축에 회전 가능하게 끼워진 로울러(25)를 포함한다. 이때, 브릿지(21)와 수직축(22) 사이에는 수직축(22)을 360도 회전 가능하도록 하는 동력원인 모터(도시되지 않음)가 설치된다.That is, as shown in the figure, the rubbing device 20 of the present invention, the bridge 21, several vertical axis 22 installed downward on the bridge 21, and the bracket 23 rotatably connected to the vertical axis ), A horizontal shaft 24 connected between both inner walls of each bracket, and a roller 25 rotatably fitted to the horizontal shaft. At this time, between the bridge 21 and the vertical shaft 22, a motor (not shown), which is a power source for rotating the vertical shaft 22 by 360 degrees, is installed.
이때, 브릿지(21)은 상하 좌우로 움직일 수 있도록 설치되어, 브릿지(21)을 옮겨가면서, 유리 기판상에 배치된 배향막(11) 전영역을 원형 형태로 배향할 수 있다.At this time, the bridge 21 is installed to move up, down, left, and right, while moving the bridge 21, it is possible to orient the entire alignment layer 11 disposed on the glass substrate in a circular shape.
즉, 상기한 액정 배향 장치(20)의 동작을 설명하면 다음과 같다.That is, the operation of the liquid crystal alignment device 20 described above is as follows.
수직축(22)이 예를들어, 360도 회전하게 되면, 수직축(22)에 연결된 수평축(24) 역시 360도 회전하게 된다. 이에따라, 수평축(24)에 끼워진 로울러(24) 역시 수평축(24)과 동일한 방향으로 회전되는데, 이때, 로울러(24)는 자체적으로 회전하면서, 수평축(24)의 회전 방향으로 회전된다. 이에 따라, 회전되는 로울러(24)에 의하여, 배향막(11)이 러빙된다.For example, when the vertical axis 22 rotates 360 degrees, the horizontal axis 24 connected to the vertical axis 22 also rotates 360 degrees. Accordingly, the roller 24 fitted to the horizontal axis 24 is also rotated in the same direction as the horizontal axis 24, wherein the roller 24 is itself rotated, in the direction of rotation of the horizontal axis 24. As a result, the alignment film 11 is rubbed by the rotating roller 24.
여기서, 로울러(25) 표면에는 러빙포가 덮혀져있으며, 로울러(25)가 회전되는 각도, 즉, 수직축(22)이 회전되는 각도에 의하여, 원형 배향 또는 부채꼴 형태로 배향할 수 있다.Here, the surface of the roller 25 is covered with a rubbing cloth, and may be oriented in a circular or fan shape by an angle at which the roller 25 is rotated, that is, an angle at which the vertical axis 22 is rotated.
또한, 브릿지(21)에 로울러(25)가 걸려있는 수에 의하여, 배향 특성이 결정된다. 즉, 하나의 브릿지(21)에 다수의 로울러(25)가 부착될수록, 더욱 완벽한 멀티 도메인을 형성한다.In addition, the orientation characteristic is determined by the number of the rollers 25 hanging on the bridge 21. That is, the more rollers 25 are attached to one bridge 21, the more complete the multi-domain is formed.
본 실시예에 따르면, 종래에 사용되던 로울러를 다수개 연결하고, 로울러를 360도 회전되도록 하므로써, 배향막을 원형 형태로 러빙한다. 그러면, 액정 분자들은 배향막의 원형 러빙축을 따라 초기 배향되므로, 여러번의 러빙 공정 및 리소그라피 공정없이 멀티 도메인을 형성할 수 있다.According to this embodiment, the alignment film is rubbed in a circular shape by connecting a plurality of rollers used in the related art and rotating the rollers 360 degrees. Then, since the liquid crystal molecules are initially oriented along the circular rubbing axis of the alignment layer, multi-domains may be formed without several rubbing processes and lithography processes.
이상에서 자세히 설명된 바와 같이, 본 발명에 의하면, 복잡한 포토리소그라피 공정 및 수번의 러빙 공정이 배제되어, 액정 표시 장치를 제조하는데 제조 비용이 절감된다.As described in detail above, according to the present invention, a complicated photolithography process and several rubbing processes are excluded, thereby reducing manufacturing costs in manufacturing the liquid crystal display device.
또한, 단일의 러빙 공정으로 멀티 도메인을 형성할 수 있으므로, 배향막이 손상되는 문제점을 방지할 수 있다.In addition, since the multi-domain can be formed by a single rubbing process, it is possible to prevent a problem that the alignment layer is damaged.
기타, 본 발명은 그 요지를 일탈하지 않는 범위에서 다양하게 변경하여 실시할 수 있다.In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1998-0034247A KR100476042B1 (en) | 1998-08-24 | 1998-08-24 | Liquid crystal alignment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1998-0034247A KR100476042B1 (en) | 1998-08-24 | 1998-08-24 | Liquid crystal alignment device |
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| Publication Number | Publication Date |
|---|---|
| KR20000014703A true KR20000014703A (en) | 2000-03-15 |
| KR100476042B1 KR100476042B1 (en) | 2005-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR10-1998-0034247A KR100476042B1 (en) | 1998-08-24 | 1998-08-24 | Liquid crystal alignment device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100446661B1 (en) * | 2001-11-22 | 2004-09-04 | 주식회사 엘지화학 | Rubbing device |
| KR100806803B1 (en) * | 2001-05-14 | 2008-02-22 | 엘지.필립스 엘시디 주식회사 | Method For Rubbing Alignment layer Of Liquid Crystal Display Device |
| KR100860480B1 (en) * | 2007-05-22 | 2008-09-26 | 위아무역주식회사 | Rubbing device having panel board position revision function |
| KR100869116B1 (en) * | 2002-08-26 | 2008-11-17 | 삼성전자주식회사 | Simple rubbing equipment for performing two rubbing process and rubbing apparatus |
| KR100939612B1 (en) * | 2005-12-29 | 2010-02-01 | 엘지디스플레이 주식회사 | Apparatus for rubbing an alignment layer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2817141B2 (en) * | 1988-07-11 | 1998-10-27 | セイコーエプソン株式会社 | Manufacturing method of liquid crystal display device |
| KR950028253U (en) * | 1994-03-17 | 1995-10-20 | LCD rubbing device for forming curved alignment pattern of liquid crystal display device | |
| JPH09230350A (en) * | 1996-02-20 | 1997-09-05 | Nissin Electric Co Ltd | Alignment layer treatment of alignment layer and device therefor |
-
1998
- 1998-08-24 KR KR10-1998-0034247A patent/KR100476042B1/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100806803B1 (en) * | 2001-05-14 | 2008-02-22 | 엘지.필립스 엘시디 주식회사 | Method For Rubbing Alignment layer Of Liquid Crystal Display Device |
| KR100446661B1 (en) * | 2001-11-22 | 2004-09-04 | 주식회사 엘지화학 | Rubbing device |
| KR100869116B1 (en) * | 2002-08-26 | 2008-11-17 | 삼성전자주식회사 | Simple rubbing equipment for performing two rubbing process and rubbing apparatus |
| KR100939612B1 (en) * | 2005-12-29 | 2010-02-01 | 엘지디스플레이 주식회사 | Apparatus for rubbing an alignment layer |
| KR100860480B1 (en) * | 2007-05-22 | 2008-09-26 | 위아무역주식회사 | Rubbing device having panel board position revision function |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100476042B1 (en) | 2005-07-07 |
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