KR960035104A - 평판 디스플레이용 홀로그래픽 백라이트 - Google Patents

평판 디스플레이용 홀로그래픽 백라이트 Download PDF

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KR960035104A
KR960035104A KR1019960007544A KR19960007544A KR960035104A KR 960035104 A KR960035104 A KR 960035104A KR 1019960007544 A KR1019960007544 A KR 1019960007544A KR 19960007544 A KR19960007544 A KR 19960007544A KR 960035104 A KR960035104 A KR 960035104A
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light
hologram
liquid crystal
crystal display
backlight
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티. 스미스 로날드
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완다 케이. 덴슨-로우
휴우즈 에어크라프트 캄파니
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Publication of KR960035104A publication Critical patent/KR960035104A/ko

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0025—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration
    • G02B27/0037—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical correction, e.g. distorsion, aberration with diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
    • H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/133536—Reflective polarizers
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G02F1/13355—Polarising beam splitters [PBS]
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/13362—Illuminating devices providing polarized light, e.g. by converting a polarisation component into another one

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

본 발명은 개선된 홀로그래픽 백라이트(10) 및 액정 디스플레이 시스템(12)에 관한 것이다. 홀로그래픽 백라이트(10)는 백색광을 제공하는 냉음극 형광관(11), 상기 백색광을 수납하도록 배치된 도광관(13)을 포함한다. 위산 지연막층(14)은 도광관(13)의 제1면(15)에 부착된다. 2중층 반사/투과 홀로그램(16)은 박막층(14)에 대향하는 도광관(13)의 출력면(17) 상에 배치된다. 냉음극 형광관(11)으로부터의 광은 도광관(13)내로 주입되고, 2중층 홀로그램(16)으로부터 회절된다.
이로 인해 액티브 매트릭스 액정 디스플레이(21)의 적색, 녹색 및 청색 엘리먼트(22)의 클리어 개구에 대응하는 적색, 녹색 및 청색의 광 패치의 어레이로 홀로그램(16)에 의해 투과된 정교한 스펙트럼 색상의 준-콜리메이트 s-편광을 만들어낸다. 그 결과 액정 디스플레이(21)는 높은 디스플레이 밝기, 배터리 전력 감소, 배터리 수명 향상, 및 시야각 향상을 통한 높은 콘트라스크를 갖게 된다.

Description

평판 디스플레이용 홀로그래픽 백라이트
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 원리에 따른 홀로그래픽 s-편광 준-콜리메이트 풀-컬러 백라이트를 도시한 도면, 제2도는 제1도의 백라이트에 사용된 액티브 매트릭스 액정 디스플레이의 단면도.

Claims (16)

  1. 백생광을 방출시키는 백색 광원(11), 도광관(13), 상기 백색 광원(11)으로부터의 백색광을 상기 도광관(13)으로 주입하기 위한 광 주입 수단(12), 상기 도광판(13)의 제1면(15) 상에 배치된 위상 지연층(14), 및 상기 도광관(13)의 출력면(17) 상에 배치된 2중층 반사/투과 홀로그램(16)을 구비하는 것을 특징으로 하는 홀로그래픽 백라이트(10).
  2. 제1항에 있어서, 상기 백색 광원(11)은 냉음극 형광관(11)인 것을 특징으로 하는 홀로그래픽 백라이트(10).
  3. 제1항에 있어서, 상기 광 주입 수단(12)은 논-이미징 집광기(12)인 것을 특징으로 하는 홀로그래픽 백라이트(10).
  4. 제1항에 있어서, 상기 도광관(13)은 테이퍼 형상으로 되어 있는 것을 특징으로 하는 홀로그래픽 백라이트(10).
  5. 제1항에 있어서, 상기 2중층 반사/투과 홀로그램(16)은 상기 도광관(13) 내로 주입된 서로 다른 각을 갖는 광을 선택하기 위해 상기 백라이트(10)의 면을 따라 가변되는 반사/투과 홀로그램 더블릿(16)의 어레이인 것을 특징으로 하는 홀로그래픽 백라이트(10).
  6. 제1항에 있어서, 상기 위상 지연층(14)은 제로(0) 지연을 갖는 것을 특징으로 하는 홀로그래픽 백라이트(10).
  7. 제1항에 있어서, 상기 2중층 반사/트과 홀로그램(16)은 그 자신을 투과하여 적색, 녹색 및 청색으로 구성된 광 패치의 어레이가 되고 정교한 스펙트럼 색상을 갖는 준-콜리메이트 s-편광(quasi-collimated s-polarized light)을 발생시키는 것을 특징으로 하는 홀로그래픽 백라이트(10).
  8. 제1항에 있어서, 상기 2중층 반사/투과 홀로그램(16)은 테이퍼 형상의 도광관(13)의 출력면(17)에 적층되어 있는 것을 특징으로 하는 홀로그래픽 백라이트(10).
  9. 제1항에 있어서, 도광관(13)은 평면-병렬 도광관(13a)이며, 상기 백라이트(10)는 백색광을 방출시키는 제2의 백색 광원(11b), 상기 제2의 백색 광원(11b)으로부터 백색광을 상기 도광관(13) 내로 주입하기 위한 제2의 광 주입 수단(12b), 및 상기 도광관(13)의 출력면(17) 상에 배치되며 다른 홀로그램(16)과 직교하도록 배치된 제2의 2중층 반사/투과 홀로그램(16b)을 구비하는 것을 특징으로하는 홀로그래픽 백라이트(10).
  10. 액정 디스플레이(21)에 사용되는 홀로그래픽 백라이트(10)에 있어서, 상기 홀로그래픽 백라이트(10)는, 백색광을 방출시키기 위한 냉음극 형광관(11), 상기 형광관(11)에 의해 출광된 백색광을 집광시키기 위한 논-이미징 집광기(12), 상기 집광기(12)에 의해 제공된 집광된 광을 수광하고 균일 밝기의 백색광을 방출시키는 출광면을 제공하는 편평한 테이퍼형 도광관(13), 상기 테이퍼 도광관(13)의 제1면(15) 상에 배치된 위상 지연막층(14), 및 상기 테이퍼 도광관(13)의 제2출력면(17) 상에 배치된 2중층 반사/투과 홀로그램(16)을 구비하며, 상기 냉음극 형광관(11)에 의해 출광된 광은 상기 테이퍼형 도광관(13) 내로 주입되어 상기 2중층 홀로그램(16)에서 회절됨으로써 액정 디스플레이(21)의 적색, 녹색 및 청색의 엘리먼트(22)의 클리어 개구에 대응하는 적색, 녹색 및 청색으로 구성된 광 패치의 어레이를 갖는 정교한 스펙트럼 색상의 준-콜리메이트 s-편광이 투과되는 것을 특징으로 하는 홀로그래픽 백라이트.
  11. 제10항에 있어서, 상기 액정 디스플레이(21)는 액티부 매트릭스 액정 디스플레이(21)인 것을 특징으로 하는 홀로그래픽 백라이트.
  12. 제10항에 있어서, 상기 2중층 반사/투과 홀로그램(16)은 상기 테이퍼형 도광관(13)의 제2출력면(17)에 적층되는 것을 특징으로 하는 홀로그래픽 백라이트.
  13. 백색광을 방출시키는 냉음극 형광관(11), 상기 형광관(11)에 의해 출광된 백색광을 집광시키기 위한 논-이미징 집광기(12), 상기 논-이미징 집광기(12)에 의해 투과된 백색광을 수납하는 도광관(13), 상기 도광관(13)의 제1면(15) 상에 배치된 위상 지연막층(14), 상기 도광관(13)의 제2출력면(17) 상에 배치되며 정교한 스펙트럼 색상의 준-콜리메니트 s-편광을 만들어내기 위한 상기 도광관(13)으로부터 출광된 광을 회전시키는 2중층 반사/투과 홀로그램(16), 상기 홀로그램(16)에 인접되게 배치되며,상기 홀로그램(16)에 의해 투과된 준-콜리메니트 s-편광을 수납하기 위한 액정 디스플레이(21), 및 상기 광을 소망의 각 관측 영역(angular viewing zine)으로 확산시키는 확산 스크린을 구비하며, 상기 냉음극 형광관(11)에 의해 출광된 광은 도광관(13) 내로 주입되어 2중층 홀로그램(16)에서 회절되어 투과됨으로써, 상기 액정 디스플레이(21)의 적색, 녹색 및 청색 엘리먼트(22)의 클리어 개구에 대응하는 적색, 녹색 및 청색으로 구성된 광 패치 어레이가 되고 정교한 스펙트럼 색상을 갖는 준-콜리메이트 s-편광으로 만들어지는 것을 특징으로 하는 액정 디스플레이 시스템(20).
  14. 제13항에 있어서, 상기 액정 디스플레이(21)는 액티브 매트릭스 액정 디스플레이(21)인 것을 특징으로 하는 액정 디스플레이 시스템.
  15. 제13항에 있어서, 상기 도광관(13)은 테이퍼 형상으로 되어 있는 것을 특징으로 하는 액정 디스플레이 시스템.
  16. 제13항에 있어서, 상기 도광관(13)은 평면-병렬 도광관(13)이며, 상기 액정 디스플레이 시스템(20)은 백색광을 방출시키는 제2의 백색 광원(11b), 상기 제2의 백색 광원(11b)으로부터의 백색광을 도광관(13) 내로 주입하기 위한 제2의 광 주입 수단(12b), 및 상기 도광관(13)의 출력면(17) 상에 배치되며 다른 홀로그램(16)과 직교하여 배치된 제2의 2중층 반사/투과 홀로그램(16b)을 더 구비하는 것을 특징으로 하는 액정 디스플레이 시스템.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960007544A 1995-03-21 1996-03-20 평판 디스플레이용 홀로그래픽 백라이트 KR960035104A (ko)

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