KR100730099B1 - Dye added ECB color LCD - Google Patents

Dye added ECB color LCD Download PDF

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Publication number
KR100730099B1
KR100730099B1 KR1020000057109A KR20000057109A KR100730099B1 KR 100730099 B1 KR100730099 B1 KR 100730099B1 KR 1020000057109 A KR1020000057109 A KR 1020000057109A KR 20000057109 A KR20000057109 A KR 20000057109A KR 100730099 B1 KR100730099 B1 KR 100730099B1
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South Korea
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liquid crystal
red
color
dye
ecb
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KR1020000057109A
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Korean (ko)
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KR20020025373A (en
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오혁진
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삼성에스디아이 주식회사
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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
    • 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
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • G02F2203/055—Function characteristic wavelength dependent wavelength filtering

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal Substances (AREA)

Abstract

본 발명의 목적은 ECB 칼라 LCD에 있어서 그 적색의 순도를 향상시키는 것이다. 본 발명에 따른 ECB 칼라 LCD는 그 액정층이 이방성 색소가 첨가되어 형성되어, 적색 선택전압이 인가되면 그 색소에 의하여 적색의 색순도가 향상되는 것을 특징으로 한다. 본 발명에 따라 액정 재료에 이방성 색소를 첨가하여 액정층을 형성한 경우, 액정분자가 전계 인가에 의하여 그 배열이 바뀌면서 색소분자의 배향을 바꾸어 적색 대역인 580에서 650대의 파장을 흡수 하게 한다. 이에 따라서 LCD의 적색순도가 향상된다.An object of the present invention is to improve the purity of the red color in an ECB color LCD. The ECB color LCD according to the present invention is characterized in that the liquid crystal layer is formed by adding an anisotropic dye, and when the red selection voltage is applied, the color purity of red is improved by the dye. When the liquid crystal layer is formed by adding an anisotropic dye to the liquid crystal material according to the present invention, the arrangement of the liquid crystal molecules is changed by applying an electric field to change the orientation of the dye molecules to absorb wavelengths of 580 to 650 in the red band. This improves the red purity of the LCD.

Description

염료첨가형 ＥＣＢ 칼라 ＬＣＤ{Dye added ECB color LCD}Dye added ECB color LCD

도 1은 본 발명에 따른 ECB 칼라 LCD에 있어서, 그 액정구조를 간략히 보이는 도면으로서, 도 1의 (a)는 전계의 인가전을 (b)는 전계의 인가후를 보인다.1 is a view briefly showing the liquid crystal structure of an ECB color LCD according to the present invention, in which FIG. 1 (a) shows before applying an electric field and (b) shows after applying an electric field.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 액정분자 20: 이방성 색소분자10: liquid crystal molecule 20: anisotropic dye molecule

본 발명은 염료가 첨가된 반사형 칼라 액정표시장치(LCD)에 관한 것으로서, 더욱 상세히는 ECB 칼라 LCD에 있어서 염료를 첨가하여 적색(RED)순도를 향상시킨 ECB 칼라 LCD에 관한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a reflective color liquid crystal display (LCD) to which dye is added, and more particularly, to an ECB color LCD in which red color is improved by adding dye in an ECB color LCD.

ECB 칼라 LCD란 액정의 전계제어 복굴절 효과(electrically controlled birefringence)를 이용하여 칼라(color)를 표시하는 방법으로서, 액정의 굴절율 이방성 때문에 액정층을 투과하는 광의 편광상태가 파장에 따라 각각 달라지는 특성을 이용하여, 액정분자의 기울기를 제어함으로써 간섭색에 의해 패널의 칼라표시를 하게 되는 LCD를 말한다.ECB color LCD is a method of displaying color by using the electrically controlled birefringence of liquid crystal. The polarization state of light passing through the liquid crystal layer varies depending on the wavelength due to the refractive anisotropy of the liquid crystal. By controlling the inclination of the liquid crystal molecules, the LCD displays the color of the panel by the interference color.

이러한 ECB 칼라 LCD에 있어서는, 그러나, 일반적으로 적색(RED)의 순도가 낮 아 화이트 밸런스가 잘 이루어지지 않는 문제가 있다.In such an ECB color LCD, however, there is a problem in that the white balance is poor due to low purity of RED.

본 발명은 상기의 문제를 해결하고자 하는 것이다. 따라서, 본 발명의 목적은 ECB 칼라 LCD에 있어서 그 적색의 순도를 향상시키는 것이다. 본 발명에 따른 ECB 칼라 LCD는 그 액정층이 이방성 색소가 첨가되어 형성되어, 적색 선택전압이 인가되면 그 색소에 의하여 적색의 색순도가 향상되는 것을 특징으로 한다. 본 발명에 따라 액정 재료에 이방성 색소를 첨가하여 액정층을 형성한 경우, 액정분자가 전계 인가에 의하여 그 배열이 바뀌면서 색소분자의 배향을 바꾸어 적색 대역인 580에서 650대의 파장을 흡수 하게 한다. 이에 따라서 LCD의 적색순도가 향상된다.The present invention is intended to solve the above problems. Therefore, it is an object of the present invention to improve the purity of the red color in an ECB color LCD. The ECB color LCD according to the present invention is characterized in that the liquid crystal layer is formed by adding an anisotropic dye, and when the red selection voltage is applied, the color purity of red is improved by the dye. When the liquid crystal layer is formed by adding an anisotropic dye to the liquid crystal material according to the present invention, the arrangement of the liquid crystal molecules is changed by applying an electric field to change the orientation of the dye molecules to absorb wavelengths of 580 to 650 in the red band. This improves the red purity of the LCD.

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

도 1은 본 발명에 따른 ECB 칼라 LCD에 있어서, 액정구조를 간략히 보인다. 먼저 도 1의 (a)는 전계의 인가 전이고 (b)는 전계의 인가 후를 보인다. 본 도에서 도시부호 10은 액정분자를 나타내고, 도시부호 20은 첨가된 색소분자를 나타낸다. 전계가 가해지기 전에는 이방성 색소에 의한 광 흡수가 없으나, 적색선택 전압이 가해지면 액정분자의 배열이 바뀌면서 첨가된 색소분자의 배향을 바꾸어 적색 대역인 580에서 650대의 파장을 흡수 하게 한다. 이에 따라서 LCD의 적색순도가 향상된다. Figure 1 shows an overview of the liquid crystal structure in the ECB color LCD according to the present invention. First, (a) of FIG. 1 shows before application of an electric field and (b) shows after application of an electric field. In the figure, reference numeral 10 denotes a liquid crystal molecule, and reference numeral 20 denotes an added pigment molecule. There is no light absorption by the anisotropic dye before the electric field is applied, but when the red selection voltage is applied, the arrangement of the liquid crystal molecules is changed to change the orientation of the added pigment molecules to absorb 650 to 650 wavelengths in the red band. This improves the red purity of the LCD.

이와 같이 본 발명은 ECB 칼라 LCD에 있어서, 그 액정에 이방성 색소를 첨가하여 적색선택전압이 가해지면 그 색소분자가 배열을 바꾸어, 적색대역의 파장을 흡수하여 적색의 색순도를 향상하게 한다. As described above, in the ECB color LCD, when the anisotropic dye is added to the liquid crystal and the red selection voltage is applied, the dye molecules change the arrangement to absorb the wavelength of the red band to improve the color purity of the red color.

본 발명은 첨부된 도면에 도시된 일 실시 예를 참고로 설명 되었으나 이는 예시적인 것이며, 당해 분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 실시 예가 가능하다는 점을 이해 할 수 있을 것이다. 따라서 본 발명의 진정한 보호범위는 첨부된 청구범위에 의해서만 정해져야 할 것이다.The present invention has been described with reference to one embodiment shown in the accompanying drawings, which is illustrative, and those skilled in the art will understand that various modifications and equivalent embodiments are possible. . Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (1)

이방성 색소가 첨가된 액정층을 구비하고,A liquid crystal layer to which an anisotropic dye is added, 상기 이방성 색소는 적색 선택전압 인가시 적색 대역 파장을 흡수하는 것을 특징으로 하는 ECB 컬러 LCD.The anisotropic dye is an ECB color LCD, characterized in that to absorb the red band wavelength when the red selection voltage is applied.
KR1020000057109A 2000-09-28 2000-09-28 Dye added ECB color LCD KR100730099B1 (en)

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KR100730099B1 true KR100730099B1 (en) 2007-06-19

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519305A (en) * 1991-07-10 1993-01-29 Seiko Epson Corp Liquid crystal display element and projection type liquid crystal display device
JPH0756174A (en) * 1993-08-12 1995-03-03 Sharp Corp Liquid crystal display device and production thereof
JPH09185031A (en) * 1995-12-28 1997-07-15 Seiko Instr Inc Liquid crystal display device
KR19990024959A (en) * 1997-09-09 1999-04-06 윤종용 Polymer dispersed liquid crystal display
KR20020002515A (en) * 2000-06-30 2002-01-10 주식회사 현대 디스플레이 테크놀로지 Polymer dispersed lcd

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0519305A (en) * 1991-07-10 1993-01-29 Seiko Epson Corp Liquid crystal display element and projection type liquid crystal display device
JPH0756174A (en) * 1993-08-12 1995-03-03 Sharp Corp Liquid crystal display device and production thereof
JPH09185031A (en) * 1995-12-28 1997-07-15 Seiko Instr Inc Liquid crystal display device
KR19990024959A (en) * 1997-09-09 1999-04-06 윤종용 Polymer dispersed liquid crystal display
KR20020002515A (en) * 2000-06-30 2002-01-10 주식회사 현대 디스플레이 테크놀로지 Polymer dispersed lcd

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