KR0153398B1 - Lcd device - Google Patents
Lcd deviceInfo
- Publication number
- KR0153398B1 KR0153398B1 KR1019940032238A KR19940032238A KR0153398B1 KR 0153398 B1 KR0153398 B1 KR 0153398B1 KR 1019940032238 A KR1019940032238 A KR 1019940032238A KR 19940032238 A KR19940032238 A KR 19940032238A KR 0153398 B1 KR0153398 B1 KR 0153398B1
- Authority
- KR
- South Korea
- Prior art keywords
- liquid crystal
- display device
- crystal display
- present
- crystal layer
- Prior art date
Links
Classifications
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
-
- 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
Abstract
본 발명은 호메오트로픽 배향되는 네마틱 액정에 전계를 가했을 때 액정이 수평배향되면서 선회성을 갖는 트위스트 네마틱 모드의 액정표시장치를 제공한다.The present invention provides a liquid crystal display device in twisted nematic mode that has liquid crystals in a horizontal orientation when the electric field is applied to the homeotropic oriented nematic liquid crystal.
본 발명의 액정표시장치는 콘트라스트비, 액정배향의 안정성, 시야각을 향상시키고, 문턱전압을 저하시켜 액정화면의 화질을 개선할 수 있다.The liquid crystal display device of the present invention can improve the contrast ratio, the stability of liquid crystal alignment, the viewing angle, and lower the threshold voltage to improve the image quality of the LCD screen.
Description
제1도는 종래의 기술에 따른 수직 배열 트위스트 네마틱 액정표시장치의 단면 구조도.1 is a cross-sectional structure diagram of a vertically aligned twisted nematic liquid crystal display device according to the related art.
제2도는 제1도의 액정표시장치에 전압인가시 액정의 배열을 개략적으로 나타낸 단면도.2 is a cross-sectional view schematically showing the arrangement of liquid crystals when voltage is applied to the liquid crystal display of FIG.
제3도는 본 발명에 따른 액정표시장치에 전압인가시 액정층의 배향을 개략적으로 나타낸 단면도.3 is a cross-sectional view schematically showing the orientation of the liquid crystal layer when voltage is applied to the liquid crystal display according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 하부 유리기판 9 : 상부 유리기판1: lower glass substrate 9: upper glass substrate
16 : 액정층16: liquid crystal layer
본 발명은 액정표시장치에 관한 것으로, 더욱 상세하게는 액정분자의 배열이 수직(호메오트로픽: homeotropic) 배열을 갖는 트위스트 네마틱 모드(twist nematic mode)의 액정표시장치에 관한 것이다.The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device in a twisted nematic mode in which an array of liquid crystal molecules has a vertical (homeotropic) arrangement.
일반적으로 수직 액정분자배열을 갖는 종래의 액정표시장치는 전계를 인가하였을 때 액정분자가 수직배열된 상태에서 수평배향으로 바뀐다.In general, a conventional liquid crystal display device having a vertical liquid crystal molecule array is changed to a horizontal alignment in a state in which the liquid crystal molecules are vertically arranged when an electric field is applied.
제1도는 종래 액정분자가 수직 배열된 트위스트 네마틱 모드의 액정표시장치의 단면구조를 나타낸 것이다.1 shows a cross-sectional structure of a liquid crystal display device in a twisted nematic mode in which conventional liquid crystal molecules are vertically arranged.
트위스트 네마틱 모드의 액정표시장치는 하부 유리기판(1)면에 다수개의 매트릭스(2)가 형성되고, 이 매트릭스 사이에 R,G,B 칼라필터(3)가 형성되며 그 전면에 칼라필터(3)의 보호막(4)이 형성되어 있고, 이 칼라필터(4)의 전면에 일정방향으로 표면이 배향된 배향막이 형성되고, 그 타측면에는 편광필름(10)이 형성되어 하부패널이 형성된다.In the liquid crystal display of the twisted nematic mode, a plurality of matrices (2) are formed on the lower glass substrate (1) surface, and R, G, and B color filters (3) are formed between the matrices, and the color filter ( A protective film 4 of 3) is formed, and an alignment film having a surface oriented in a predetermined direction is formed on the front surface of the color filter 4, and a polarizing film 10 is formed on the other side thereof to form a lower panel. .
또한, 상부 유리기판(9)의 표면에는 공통전극(8)이 형성되며 이 공통전극의 전면에 액정을 일정방향으로 배향시키는 배향막(7)이 형성되고, 그 타측면에는 입사광이 방향을 편광시키는 편광필름(11)이 형성되어 상부패널이 형성된다.In addition, a common electrode 8 is formed on the surface of the upper glass substrate 9, and an alignment film 7 for aligning a liquid crystal in a predetermined direction is formed on the front surface of the common glass, and on the other side, incident light polarizes a direction. The polarizing film 11 is formed to form an upper panel.
상, 하부 패널 사이에는 액정층(11)이 형성되며 이 액정층 액정분자의 장축이 유리기판(1,9)의 평면에 수직으로 향하는 수직 구조로 배열되어 있다.The liquid crystal layer 11 is formed between the upper and lower panels, and the long axes of the liquid crystal layer liquid crystal molecules are arranged in a vertical structure that is perpendicular to the plane of the glass substrates 1 and 9.
이러한 수직 배열은 배향막(5,7)의 표면을 처리하여 상, 하부 유리기판(1,9) 사이에 주입된 액정층(6)의 배열이 수직 구조를 갖도록 한다. 이때 이 액정층의 종류는 네마틱 액정이다.This vertical arrangement treats the surfaces of the alignment layers 5 and 7 so that the arrangement of the liquid crystal layers 6 injected between the upper and lower glass substrates 1 and 9 has a vertical structure. At this time, the kind of this liquid crystal layer is a nematic liquid crystal.
이러한 액정물질로 액정층(6)이 형성된 종래의 수직 액정표시장치는 제2도에 나타낸 바와 같이 전극애 전압을 인가하였을 때 액정분자가 유리기판(1,9)의 평면에 평행하도록 배열하여 투과되는 빛을 차단시킴으로서 화면을 디스플레이 시키게 되는데 이때 액정분자가 수평배향되므로 배향막의 배향러빙(rubbing)이 약할 경우 액정배향이 잘되지 않아 투과되는 빛을 적절히 차단하지 못하기 때문에 콘트라스트비가 약하고, 액정을 배향시켜 디스플레이 시키는 전압인 문턱전압이 크고 빛의 경로가 단순하므로 시야각이 좁은 단점이 있다.In the conventional vertical liquid crystal display device in which the liquid crystal layer 6 is formed of the liquid crystal material, the liquid crystal molecules are arranged in parallel with the planes of the glass substrates 1 and 9 when the electrode voltage is applied, as shown in FIG. The screen is displayed by blocking the light. In this case, since the liquid crystal molecules are horizontally aligned, when the alignment rubbing of the alignment layer is weak, the liquid crystal orientation is not good and the contrast ratio is weak, and the contrast ratio is weak. Because the threshold voltage, which is the voltage displayed by the display, is large and the light path is simple, the viewing angle is narrow.
상술한 종래기술의 단점을 해결하기 위한 본 발명의 목적은, 액정을 수직구조로 배열한 트위스트 네마틱 모드의 액정표시장치의 액정에 선회성을 갖는 콜레스테릭 액정을 도판트로서 첨가하여 액정표시장치의 콘트라스트비, 시야각, 배향의 안정성을 향상시키고 문턱전압을 낮추는데 있다.An object of the present invention for solving the above-mentioned disadvantages of the prior art, liquid crystal display by adding a cholesteric liquid crystal having a pivotability as a dopant to the liquid crystal of the liquid crystal display device of the twisted nematic mode in which the liquid crystal is arranged in a vertical structure To improve the contrast ratio, viewing angle and orientation of the device and lower the threshold voltage.
상기 목적을 달성하기 위한 본 발명은 상, 하 패널로 형성되는 액정셀의 액정층을 수직배향시키는 동시에 이 액정층에 선회성 도판트를 첨가하는 것을 특징으로 한다.The present invention for achieving the above object is characterized by vertically aligning the liquid crystal layer of the liquid crystal cell formed of the upper and lower panels, and adding a turning dopant to the liquid crystal layer.
이하 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
본 발명의 액정표시장치는 모든 구조를 갖는 액정표시장치에 적용될 수 있으며, 종래의 기술과의 차이점은 액정층을 형성하는 방식이 다르다.The liquid crystal display device of the present invention can be applied to a liquid crystal display device having all structures, and the difference from the prior art is a method of forming a liquid crystal layer.
예컨대 본 발명의 제1도와 같은 구조를 갖는 액정표시장치에서 액정셀에 주입형성되는 액정이 수직 형상으로 배열되도록 배향막(5,7)을 처리한 후 액정층(16)을 주입하며 이 액정층에 선회성을 갖는 도판트(s811), 예컨데 좌선회성을 갖는 콜레스테릭 액정을 소정의 량으로 첨가하여 액정표시장치를 제조한다.For example, in the liquid crystal display device having the structure as shown in FIG. 1 of the present invention, after the alignment layers 5 and 7 are processed so that the liquid crystals formed in the liquid crystal cell are arranged in a vertical shape, the liquid crystal layer 16 is injected into the liquid crystal layer. A dopant s811 having swirlability, for example, a cholesteric liquid crystal having left swirlability, is added in a predetermined amount to manufacture a liquid crystal display device.
액정층에 선회성 도판트를 첨가한 본 발명의 액정표시장치는 제3도의 개략도에서 나타낸 바와 같이 상, 하부 유리기판(9,1) 사이에 주입된 액정층(16)에 전계인가시 액정층(16)은 전계의 방향으로 수평배향되면서 선회하여 유리기판(1,9)의 평면에 수평으로 배향된다.In the liquid crystal display device of the present invention in which a swirling dopant is added to the liquid crystal layer, the liquid crystal layer is applied when an electric field is applied to the liquid crystal layer 16 injected between the upper and lower glass substrates 9 and 1, as shown in the schematic diagram of FIG. Numeral 16 is pivoted while being oriented horizontally in the direction of the electric field, and is oriented horizontally in the plane of the glass substrates 1 and 9.
이와 같이 인가전압에 의해 수평배향되면서 좌측으로 선회하는 본 발명의 액정표시장치는 종래의 기술에서 액정분자축이 단순히 수평배향되는 액정표시장치에 비해 낮은 문턱전압에서 배향을 안정화시킬 수 있고, 투과되는 빛의 산란성을 높여 콘트라스트비를 높일 수 있으며 빛의 투과방향을 넓힐 수 있어 시야각을 넓게 하므로 액정표시장치의 화질을 개선할 수 있다.As described above, the liquid crystal display device of the present invention which is horizontally oriented by the applied voltage and turns to the left side can stabilize the alignment at a lower threshold voltage than the liquid crystal display device in which the liquid crystal molecule axis is simply horizontally oriented in the related art, and is transmitted. The light scattering property can be increased to increase the contrast ratio, and the light transmission direction can be widened to increase the viewing angle, thereby improving the image quality of the LCD.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940032238A KR0153398B1 (en) | 1994-11-30 | 1994-11-30 | Lcd device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940032238A KR0153398B1 (en) | 1994-11-30 | 1994-11-30 | Lcd device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960018684A KR960018684A (en) | 1996-06-17 |
| KR0153398B1 true KR0153398B1 (en) | 1998-11-16 |
Family
ID=19399870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019940032238A KR0153398B1 (en) | 1994-11-30 | 1994-11-30 | Lcd device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0153398B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458837B1 (en) * | 1997-11-26 | 2005-04-08 | 삼성전자주식회사 | LCD Display |
| KR100849357B1 (en) | 2006-08-11 | 2008-07-29 | 전북대학교산학협력단 | Method of Viewing Angle Control of Twisted Nematic Liquid Crystal Display |
-
1994
- 1994-11-30 KR KR1019940032238A patent/KR0153398B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100458837B1 (en) * | 1997-11-26 | 2005-04-08 | 삼성전자주식회사 | LCD Display |
| KR100849357B1 (en) | 2006-08-11 | 2008-07-29 | 전북대학교산학협력단 | Method of Viewing Angle Control of Twisted Nematic Liquid Crystal Display |
Also Published As
| Publication number | Publication date |
|---|---|
| KR960018684A (en) | 1996-06-17 |
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