KR100313120B1 - Method of scattering for Liquid crystal device - Google Patents
Method of scattering for Liquid crystal device Download PDFInfo
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- KR100313120B1 KR100313120B1 KR1019990003025A KR19990003025A KR100313120B1 KR 100313120 B1 KR100313120 B1 KR 100313120B1 KR 1019990003025 A KR1019990003025 A KR 1019990003025A KR 19990003025 A KR19990003025 A KR 19990003025A KR 100313120 B1 KR100313120 B1 KR 100313120B1
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- Prior art keywords
- spacer
- liquid crystal
- electrode
- lower substrate
- nozzle
- Prior art date
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title abstract description 10
- 125000006850 spacer group Chemical group 0.000 claims abstract description 43
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 13
- 230000005611 electricity Effects 0.000 claims abstract description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 4
- 238000000790 scattering method Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 230000007480 spreading Effects 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
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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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
Landscapes
- 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
목적 : 본 발명은 액정셀 간격을 균일하게 유지하면서도 광누설 현상에 의한 화면 불량을 개선시킬 수 있는 스페이서의 산포방법을 제공하는 것이 목적이다.Objectives: It is an object of the present invention to provide a method for dispersing a spacer which can improve screen defects due to light leakage while maintaining a uniform liquid crystal cell spacing.
구성 : 순수와 알코올 및 스페이서가 혼합된 용액을 노즐(32)로 분산시켜 전극(20)이 패턴된 하부기판(16)으로 산포시킬 때, 스페이서(26)는 플러스 전하를 띠도록 대전시키고 전극(20)은 플러스 전기가 흐르도록 한 다음 스페이서(26)를 하부기판(16) 위로 산포시키는 산포방법을 제안한다.Composition: When a mixture of pure water, alcohol and a spacer is dispersed with a nozzle 32 to spread the electrode 20 onto the patterned lower substrate 16, the spacer 26 is charged to have a positive charge and the electrode ( 20 proposes a scattering method that allows positive electricity to flow and then spreads the spacer 26 over the lower substrate 16.
효과 : 액정표시소자로 입사된 광이 전극을 통과할 때 광누설 현상이 발생되지 않아 좀 더 향상된 화면을 얻을 수 있고, 스페이서가 서로 동일한 전기로 대전되어 반발함으로써 뭉져지는 현상이 감소되었다.Effect: When light incident on the liquid crystal display passes through the electrode, light leakage does not occur, and thus a more improved screen can be obtained.
Description
본 발명은 액정표시소자의 셀 간격을 위한 스페이서의 산포방법에 관한 것으로, 좀 더 상세하게는 하부기판 위로 패턴되는 전극 위로 스페이서가 얹혀지지 않도록 하여 액정표시소자를 통과하는 광이 누설되는 것을 방지하는 액정표시소자용 스페이서의 산포방법에 관한 것이다.The present invention relates to a method of dispersing a spacer for cell spacing of a liquid crystal display device, and more particularly, to prevent leakage of light passing through the liquid crystal display device by preventing the spacer from being placed on an electrode patterned on a lower substrate. A scattering method of a spacer for a liquid crystal display device.
잘 알려진 바와 같이 액정표시소자는 저구동전압 및 저소비전력, 액정패널의 평탄성 등에 의해 디지털 속목시계, 페이져, 휴대폰 및 랩탑컴퓨터 등에 다양하게 적용됨과 아울러 벽걸이형 TV 등에 응용되고 있는 평판 디스플레이로, 배열방향의 변화에 따라 입사광의 반사특성이 변화되는 액정의 유전이방성에 의해 소망하는 문자나 영상을 구현한다.As is well known, the liquid crystal display device is a flat panel display that is widely applied to digital clocks, pagers, mobile phones, laptop computers, etc. due to low driving voltage, low power consumption, and flatness of liquid crystal panel. The desired character or image is realized by the dielectric anisotropy of the liquid crystal whose reflection characteristic of incident light changes according to the change of.
이러한 액정표시소자에는 기판의 후면에 백라이트를 채용하여 빛을 국부적으로 투과시킴으로써 문자, 숫자 등을 표시하는 투과형(Transmissive Type)과, 반사판을 채용하여 전면의 기판으로 입사되는 광을 반사시키는 반사형(Reflective Type)이 있다.The liquid crystal display device has a transmissive type that displays letters, numbers, etc. by employing a backlight on the back of the substrate to locally transmit light, and a reflection type that reflects light incident on the front substrate by employing a reflector. Reflective Type).
액정표시소자는 평행하게 배치된 두 기판의 내측면에 각각 투명전극이 패터닝되어 다수의 도트를 형성하고 그 내부로 액정이 주입되어 액정셀을 형성하며 액정셀의 외측면에 편광판을 부착시키는 구조이다.The liquid crystal display device has a structure in which transparent electrodes are patterned on inner surfaces of two substrates arranged in parallel to form a plurality of dots, and liquid crystal is injected into the liquid crystal cells to form a liquid crystal cell, and a polarizing plate is attached to the outer surface of the liquid crystal cell. .
여기서, 도 3에 도시한 바와 같이 두 기판(2)(4)의 사이에는 액정셀(6)의 간격이 유지되도록 하는 스페이서(8)가 분포되어진다. 이 스페이서(8)는 투명하여 입사광이 통과되어져야 함으로 실리카나 폴리에틸렌계로 제조되며 0.05~0.3㎛의 직경을 갖는 구형 또는 막대형으로 형성되는 것이다.Here, as shown in FIG. 3, a spacer 8 is disposed between the two substrates 2 and 4 so that the gap of the liquid crystal cell 6 is maintained. Since the spacer 8 is transparent and incident light must pass therethrough, the spacer 8 is made of silica or polyethylene and is formed in a spherical or rod shape having a diameter of 0.05 to 0.3 μm.
그러나, 이러한 스페이서가 전극 위로도 분포됨으로써 액정표시소자에서 화상을 표시하는 도트로 입사된 빛이 스페이서에 의해 굴절되어 광누설 현상이 발생하여 뚜렷한 화면을 구현하지 못하는 문제가 있다.However, since the spacers are also distributed over the electrodes, light incident on the dots displaying an image in the liquid crystal display is refracted by the spacers, resulting in a light leakage phenomenon, thereby preventing a clear screen from being realized.
또한, 노즐을 통해 스페이서가 분산된다 하더라도 워낙 미세한 직경을 가지므로 스페이서 간에 뭉쳐져서 액정셀의 간격이 불균일하게 되는 경우가 다반사다.In addition, even if the spacers are dispersed through the nozzle, because they have a very small diameter, there are many cases where the gaps between the liquid crystal cells become uneven due to agglomeration between the spacers.
이러한 문제점들을 해결하기 위해 안출된 본 발명은 액정셀 간격을 균일하게 유지하면서도 광누설 현상에 의한 화면 불량을 개선시킬 수 있는 스페이서의 산포방법을 제공하는 것이 목적이다.The present invention devised to solve these problems is an object of the present invention to provide a method for dispersing a spacer that can improve the screen defects due to the light leakage phenomenon while maintaining a uniform liquid crystal cell interval.
이를 위하여, 본 발명은 순수와 알코올 및 스페이서가 혼합된 용액을 노즐로 분산시켜 전극이 패턴된 하부기판으로 산포시킬 때, 스페이서는 플러스 전하를 띠도록 대전시키고 전극은 플러스 전기가 흐르도록 한 다음 스페이서를 하부기판 위로 산포시키는 산포방법을 제안한다.To this end, the present invention is to disperse a solution of pure water, alcohol and spacer with a nozzle so that when the electrode is scattered to the patterned lower substrate, the spacer is charged to have a positive charge and the electrode is a positive electricity flow and then the spacer We propose a spreading method for spreading on a lower substrate.
이에 따라, 스페이서가 플러스 전하를 띠고 전극도 플러스로 대전됨으로써 서로 반발하기 때문에 전극이 패턴되지 않은 하부기판의 위로 산포되어진다.As a result, the electrodes are positively charged and the electrodes are also positively charged to repel each other, so that the electrodes are scattered over the unpatterned lower substrate.
도 1은 본 발명에 관련된 스페이서 산포방법에 의해 제조된 액정표시소자의 구조 일부를 도시한 단면도,1 is a cross-sectional view showing a part of a structure of a liquid crystal display device manufactured by a spacer scattering method according to the present invention;
도 2a와 도 2b는 본 발명에 관련된 스페이서를 산포하는 과정을 도시한 도면,2A and 2B illustrate a process of distributing a spacer according to the present invention;
도 3은 종래 공지된 스페이서 산포방법에 의해 제조된 액정표시소자의 구조를 도시한 단면도.3 is a cross-sectional view showing the structure of a liquid crystal display device manufactured by a conventionally known spacer spreading method.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10 : 액정셀12 : 편광판10 liquid crystal cell 12 polarizing plate
14, 16 : 상부기판, 하부기판18, 20 : 전극14, 16: upper substrate, lower substrate 18, 20: electrode
22 : 절연막24 : 배향막22 insulating film 24 alignment film
26 : 스페이서28 : 저장용기26: spacer 28: storage container
30 : 챔버32 : 노즐30 chamber 32 nozzle
이하 본 발명에 따른 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 관련된 스페이서 산포방법에 의해 제조된 액정표시소자의 구조 일부를 도시한 단면도이고, 도 2a와 도 2b는 스페이서를 산포하는 과정을 도시한 도면이다.1 is a cross-sectional view showing a part of a structure of a liquid crystal display device manufactured by a spacer distributing method according to the present invention, and FIGS. 2A and 2B illustrate a process of dispersing a spacer.
도면 부호 10은 액정셀이고 그 외측면에는 일축 방향으로 빛을 투과시키는 편광판(12)이 서로 직교되어 배치된다.Reference numeral 10 denotes a liquid crystal cell, and polarizing plates 12 that transmit light in one axial direction are disposed orthogonal to each other on an outer surface thereof.
상기 액정셀(10)은 글라스로 된 상부기판(14)과 하부기판(16)이 평행하게 배치되고 두 기판(14)(16) 사이에 도시 생략된 실란트로 공간을 형성하여 그 내부로 액정을 주입하는 것이다.In the liquid crystal cell 10, a glass upper substrate 14 and a lower substrate 16 are arranged in parallel, and a space is formed between sealants (not shown) between the two substrates 14 and 16 to inject liquid crystal into the liquid crystal cell 10. It is.
두 기판(14)(16)의 내측면에는 각각 투명전극(18)(20)이 패터닝되어지는데, 상부기판(14)의 투명전극(18)은 세그먼트 신호를 하부기판(16)의 투명전극(20)은 커먼 신호를 형성한다.The transparent electrodes 18 and 20 are patterned on the inner surfaces of the two substrates 14 and 16, respectively. The transparent electrodes 18 of the upper substrate 14 transmit segment signals to the transparent electrodes of the lower substrate 16. 20) forms a common signal.
상기 상부기판(14)과 하부기판(16)의 투명전극(18)(20) 위로는 절연막(22)과 배향막(24)이 순차적으로 도포되며, 절연막(22)은 규소, 티타늄, 지르코늄이 함유된 산화물을 적당한 비율로 혼합하여 사용할 수 있고, 배향막(24)은 폴리이미드수지를 이용하여 도포하며 그 상면은 액정의 배향각도를 감안하여 러빙시키게 된다.The insulating layer 22 and the alignment layer 24 are sequentially applied on the transparent electrodes 18 and 20 of the upper substrate 14 and the lower substrate 16, and the insulating layer 22 contains silicon, titanium, and zirconium. The used oxides can be mixed and used in an appropriate ratio. The alignment film 24 is coated using polyimide resin, and the upper surface thereof is rubbed in consideration of the alignment angle of the liquid crystal.
이렇게 구성되는 액정셀(10)은 두 기판 사이의 간격유지가 매우 중요하다. 즉, 화상의 고속응답, 고콘트라스트, 넓은 시각의 성능을 좌우하는 요소로 작용하는 것이다.In the liquid crystal cell 10 configured as described above, it is very important to maintain a gap between the two substrates. That is, it acts as an element that determines the high speed response, high contrast, and wide visual performance of an image.
이에 따라, 두 기판이 어셈블리되기 전에 하부기판(16)의 배향막(24) 상부로 스페이서(26)를 산포한 다음 어셈블리하여 두 기판 사이의 간격이 적절하게 유지되도록 한다.Accordingly, before the two substrates are assembled, the spacers 26 are spread over the alignment layer 24 of the lower substrate 16 and then assembled so that the gap between the two substrates is maintained properly.
이를 위하여, 본 발명의 특징에 따라 제안되는 산포방법으로 하부기판(16)의 상면에 스페이서(26)를 산포시키는데, 우선 순수와 알코올 및 스페이서(26)를 혼합하되 스페이서(26)가 뭉쳐지지 않도록 혼합한 용액을 저장용기(28)에 저장시킨 다음 챔버(30)의 내부에서 노즐(32)을 통해 산포시킨다.To this end, the spacer 26 is scattered on the upper surface of the lower substrate 16 by the spreading method proposed in accordance with the characteristics of the present invention. First, pure water and alcohol and the spacer 26 are mixed, but the spacer 26 is not agglomerated. The mixed solution is stored in the storage container 28 and then dispersed through the nozzle 32 inside the chamber 30.
이 때, 노즐(32)이 대전기능을 갖도록 하면 노즐(32)을 통해 분사되는 스페이서(26)는 플러스 전기를 띄게 되며, 이 스페이서(26)는 무화상태에서 낙하하게 된다.At this time, if the nozzle 32 has a charging function, the spacer 26 injected through the nozzle 32 exhibits positive electricity, and the spacer 26 falls in the atomized state.
한편, 하부기판(16)에 패턴된 모든 전극(20)에 플러스 전기가 흐르도록 전기를 인가하여서 배향막(24) 위로 낙하된 스페이서(26)가 전극(20)과 반발하도록 한다.Meanwhile, electricity is applied to all the electrodes 20 patterned on the lower substrate 16 so that positive electricity flows so that the spacers 26 dropped on the alignment layer 24 repel with the electrodes 20.
결과적으로 전극(20) 상방에 해당하는 배향막(24)의 상면으로는 스페이서(26)가 도포되지 못하고 나머지 부분으로만 위치하게 됨으로써 스페이서(26) 간에 뭉쳐지는 현상이 현저하게 감소하게 되었다.As a result, the spacer 26 is not applied to the upper surface of the alignment layer 24 corresponding to the upper portion of the electrode 20, and thus, the spacer 26 is positioned only at the remaining portion, thereby significantly reducing the aggregation between the spacers 26.
또한, 배향막(24)의 위에서 전극(20) 상방에 해당하는 부분으로 스페이서(26)가 놓이지 않아 액정표시소자로 입사된 광이 직접 전극(20)을 통과하게 되어 광누설 현상이 발생하지 않는다.In addition, since the spacer 26 is not placed on the alignment layer 24 above the electrode 20, light incident to the liquid crystal display device passes directly through the electrode 20, so that light leakage does not occur.
이상에서 살펴본 바와 같이 본 발명에 따른 실시예는 종래의 문제점을 실질적으로 해소하고 있다.As described above, the embodiment of the present invention substantially solves the conventional problems.
즉, 노즐을 통해 분사되는 스페이서가 플러스 전기를 띰으로 동일한 전기로 되는 전극과 반발되어져서 배향막 위로 산포되는 스페이서가 전극이 패턴된 자리를 피하여 도포되어진다.That is, the spacers injected through the nozzles are repulsed with the electrodes which become the same electricity with the addition of the positive electricity so that the spacers scattered over the alignment film are applied avoiding the place where the electrodes are patterned.
이에 따라, 액정표시소자로 입사된 광이 전극을 통과할 때 광누설 현상이 발생되지 않아 좀 더 향상된 화면을 얻을 수 있다.Accordingly, the light leakage phenomenon does not occur when the light incident on the liquid crystal display device passes through the electrode, thereby obtaining a more improved screen.
또한, 스페이서 간에도 같은 전기로 대전됨으로 반발하여 뭉져지는 현상이 감소되었다.In addition, the phenomenon of repulsion and agglomeration by the same electric charge between spacers was reduced.
Claims (1)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990003025A KR100313120B1 (en) | 1999-01-30 | 1999-01-30 | Method of scattering for Liquid crystal device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990003025A KR100313120B1 (en) | 1999-01-30 | 1999-01-30 | Method of scattering for Liquid crystal device |
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| KR100777707B1 (en) * | 2007-09-05 | 2007-11-21 | 삼성전자주식회사 | Spacer system for a liquid crystal display |
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