KR950033601A - Lighting device and liquid crystal display device using the same - Google Patents

Lighting device and liquid crystal display device using the same Download PDF

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Publication number
KR950033601A
KR950033601A KR1019950011853A KR19950011853A KR950033601A KR 950033601 A KR950033601 A KR 950033601A KR 1019950011853 A KR1019950011853 A KR 1019950011853A KR 19950011853 A KR19950011853 A KR 19950011853A KR 950033601 A KR950033601 A KR 950033601A
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South Korea
Prior art keywords
light
light guide
liquid crystal
crystal display
plate
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KR1019950011853A
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Korean (ko)
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KR0166144B1 (en
Inventor
마사노부 오까노
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쯔지 하루오
샤프 가부시끼가이샤
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Publication of KR950033601A publication Critical patent/KR950033601A/en
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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
    • G02B6/0035—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
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—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
    • G02B6/0033—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
    • G02B6/0051—Diffusing 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
    • G02B6/0033—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
    • 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

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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)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

조명장치에 있어서, 방출관으로 부터 도광체로 조사되고, 이 도광체의 발광면에서 출사된 광은 집광제어판의 3각주형의 프리즘에 의해 법선방향으로 향해 집광된다. 시계제어판은, 법선방향에서 소정 범위내의 시야각으로 부터의 시계를 투명하게 하고, 상기 소정 범위외의 시야각으로 부터의 시계를 불투명하게 한다. 이에 따라, 조명장치의 면휘도가 향상되고, 표시품위의 열화가 방지될 수 있어 고휘도의 고품위 조명장치가 제공될 수 있다.In the illuminating device, the light is irradiated from the emitting tube to the light guide, and the light emitted from the light emitting surface of the light guide is focused toward the normal direction by a triangular prism of the light condensing control panel. The clock control panel makes the clock from the viewing angle within the predetermined range transparent in the normal direction, and makes the clock from the viewing angle outside the predetermined range opaque. Accordingly, the surface brightness of the lighting device can be improved, and deterioration of the display quality can be prevented, so that a high quality lighting device with high brightness can be provided.

Description

조명장치 및 이를 사용한 액정표시장치Lighting device and liquid crystal display device using the same

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 1실시예의 조명장치의 단면도, 제2도는 상기 조명장치의 사시도.1 is a cross-sectional view of a lighting apparatus of an embodiment of the present invention, Figure 2 is a perspective view of the lighting apparatus.

Claims (22)

광투과성을 갖는 판상의 도광체, 상기 도광체의 적어도 일단면에 배치된 선형 광원, 상기 도광체의 발광면측에 설치됨과 동시에, 그 표면에 다수의 프리즘이 형성되어, 도광체의 발광면으로부터 조사된 광을 상기 발광면의 법선방향으로 집광하면서 투과시키는 집광제어판, 및 법선방향에 대해 소정각도 내의 시계를 투명하게 하고, 상기 법선방향에 대해 소정 각도외의 시계를 불투명하게 하는 시계제어부재를 포함하는 것을 특징으로 하는 조명장치.A plate-shaped light guide having a light transmittance, a linear light source disposed on at least one end surface of the light guide, and a plurality of prisms are formed on the surface of the light guide and irradiated from the light emitting surface of the light guide. A condensing control panel for condensing the transmitted light while condensing in the normal direction of the light emitting surface; Illumination apparatus, characterized in that. 제1항에 있어서, 상기 집광판에 설치된 프리즘이 정각이 90°내지 100°의 3각주이고 상기 시계제어부재가 시계를 투명하게 하는 시야각의 범위는 상기 프리즘의 정각과 거의 같거나, 상기 정각보다 작게 되도록 설정되는 조명장치.According to claim 1, wherein the prism provided on the light collecting plate is a triangular footnote 90 degrees to 100 degrees and the range of the viewing angle at which the clock control member makes the clock transparent is approximately equal to or smaller than the right angle of the prism. Lighting equipment set to be. 제1항에 있어서, 상기 시계제어부재는, 집광판 표면에 직교하도록 또한 서로 평행하도록 설치된 다수의 차광판을 포함하며, 상기 차광판은 시야각이 소정치를 초과하면 헤이즈율이 급격히 증가하도록 설정되는 조명장치.The illuminating device according to claim 1, wherein the clock control member includes a plurality of light blocking plates installed to be perpendicular to and parallel to the surface of the light collecting plate, wherein the light blocking plate is set so that the haze rate increases rapidly when the viewing angle exceeds a predetermined value. 제3항에 있어서, 상기 시계제어부재의 헤이즈율은, 투명시야각 범위에서 10% 이하이고, 불투명시야각 범위에서 70% 이상으로 되도록 상기 차광판에 의해 제어되는 조명장치.4. The lighting apparatus of claim 3, wherein the haze rate of the clock control member is controlled by the light shielding plate to be 10% or less in the transparent viewing angle range and 70% or more in the opaque viewing angle range. 제1항에 있어서, 상기 시계제어부재는 법선방향에 대해 소정각도이내의 각도로 입사한 광은 투과시키고, 상기 소정각도보다 큰 각도로 입사한 광은 산란시키는 광학특성을 갖는 막상부재인 조명장치.The apparatus of claim 1, wherein the clock control member is a film member having an optical characteristic for transmitting light incident at an angle within a predetermined angle with respect to a normal direction and scattering light incident at an angle greater than the predetermined angle. . 제1항에 있어서, 상기 시계제어부재는 상기 집광판과 거의 같은 면적을 커버하는 박막상의 수지시트로 이루어지는 조명장치.The illumination device according to claim 1, wherein the clock control member is made of a thin film resin sheet covering an area substantially the same as that of the light collecting plate. 제6항에 있어서, 상기 시계제어부재는 투명한 수지시트들 사이에 협지된 블라인드수지시트로 이루어지며, 상기 블라인드수지시트는 그의 면에 직교하고 또한 서로 평행으로 설치된 다수의 차광판을 내부에 포함하는 조명장치.The illumination control device of claim 6, wherein the clock control member is formed of a blind resin sheet sandwiched between transparent resin sheets, and the blind resin sheet includes a plurality of light shielding plates provided at right angles and parallel to each other. Device. 제1항에 있어서, 상기 도광체는 발광면측을 정면으로 한 경우에 도광체의 배면에 설치된 광을 산란시키는 불규칙 반사부를 포함하는 조명장치.The illuminating device according to claim 1, wherein the light guide includes an irregular reflector for scattering light provided on a rear surface of the light guide when the light emitting surface is faced. 제1항에 있어서, 상기 도광체는 발광면측을 정면으로 한 경우에, 상기 도광체 배면측에 설치되며, 이 도광체로부터 배면측으로 출사되는 광을 도광체의 내부로 향해 반사시키는 반사판을 더 포함하는 조명장치.2. The light guide according to claim 1, wherein the light guide further includes a reflecting plate which is provided on the rear side of the light guide when reflecting the light emitting surface side in front, and reflects the light emitted from the light guide toward the back side toward the inside of the light guide. Lighting equipment. 제1항에 있어서, 상기 선형광원으로부터 도광체로 입사하는 방향과 다른 방향으로 조사되는 광을 상기 도광체로 향해 반사시키는 반사부재를 더 포함하는 조명장치.The lighting apparatus according to claim 1, further comprising a reflecting member for reflecting the light irradiated in a direction different from the direction of incidence from the linear light source to the light guide toward the light guide. 제1항에 있어서, 상기 도광체와 상기 집광판과의 사이에 광을 확산시키는 광학산시트를 더 포함하는 조명장치.The lighting apparatus according to claim 1, further comprising an optical scattering sheet for diffusing light between the light guide and the light collecting plate. 액정표시패널, 상기 액정표시패널의 배면측에, 이 액정표시패널과 평행으로 되도록 설치된 도광판, 상기 도광판의 적어도 하나의 단면에 광을 입사시키는 광원, 상기 도광판과 상기 액정표시패널사이에 설치되고, 상기 도광판으로부터 출사된 광을 법선방향으로 집광시키면서 투과시키는 집광판, 상기 도광판과 상기 액정표시패널사이에 설치되고, 법선방향에 대해 소정 각도내의 시계를 투명하게 하고, 상기 법선방향에 대해 소정 각도외의 시계를 불투명하게 하는 시계제어부재를 포함하는 액정표시장치.A liquid crystal display panel, a light guide plate provided on the rear side of the liquid crystal display panel so as to be parallel to the liquid crystal display panel, a light source for injecting light into at least one end face of the light guide plate, between the light guide plate and the liquid crystal display panel; A light collecting plate that transmits the light emitted from the light guide plate while condensing in the normal direction, and is installed between the light guide plate and the liquid crystal display panel, and makes a clock within a predetermined angle with respect to the normal direction, and a clock outside a predetermined angle with respect to the normal direction. Liquid crystal display comprising a clock control member for making the opaque. 제12항에 있어서, 상기 제어부재가 시계를 투명하게 하는 시야각의 범위는 액정표시패널의 시야각범위보다도 넓도록 설저되는 액정표시장치.The liquid crystal display device according to claim 12, wherein the range of the viewing angle at which the control member makes the clock transparent is wider than the viewing angle range of the liquid crystal display panel. 제12항에 있어서, 상기 집광판은 액정표시패널측의 면에 3각주형의 프리즘을 각각 포함하는 액정표시장치.13. The liquid crystal display device according to claim 12, wherein the light collecting plates each include a triangular prism on a surface of the liquid crystal display panel side. 제12항에 있어서, 상기 시계제어부재는, 상기 집광판 표면에 직교하도록, 또한 서로 평행으로 설치된 다수의 차광판을 포함하며, 상기 차광판은 시야각이 소정치를 초과하면 헤이즈율이 급격히 증가하도록 설정되는 액정표시장치.The liquid crystal display device according to claim 12, wherein the clock control member includes a plurality of light blocking plates perpendicular to the surface of the light collecting plate and arranged in parallel with each other, wherein the light blocking plate is set such that the haze rate increases rapidly when the viewing angle exceeds a predetermined value. Display. 제12항에 있어서, 상기 시계제어부재는 법선방향에 대해 소정각도이내의 각도로 입사한 광은 투과시키고, 상기 소정각도보다 큰 각도로 입사한 광은 산란시키는 광학특성을 갖는 막상부재인 액정표시장치.The liquid crystal display of claim 12, wherein the clock control member is a film member having an optical characteristic for transmitting light incident at an angle within a predetermined angle with respect to a normal direction and scattering light incident at an angle greater than the predetermined angle. Device. 제12항에 있어서, 상기 시계제어부재는 상기 집광판과 거의 같은 면적의 박막상의 수지시트로 이루어지는 액정표시장치.The liquid crystal display device according to claim 12, wherein the clock control member is made of a thin film resin sheet having an area substantially the same as that of the light collecting plate. 제17항에 있어서, 상기 시계제어부재는 투명한 수지시트들 사이에 협지된 블라인드수지시트로 이루어지며, 상기 블라인드수지시트는 그의 면에 직교하고 또한 서로 평행으로 설치된 다수의 차광판을 내부에 포함하는 액정표시장치.18. The liquid crystal display of claim 17, wherein the clock control member is formed of a blind resin sheet sandwiched between transparent resin sheets, and the blind resin sheet includes a plurality of light shielding plates disposed perpendicularly to and parallel to each other. Display. 제12항에 있어서, 상기 도광판은 상기 액정패널과 평행으로 배치된 면들중 하나에 설치된 광을 산란시키기 위한 불규칙 반사부를 포함하며, 상기 면들중 하나는 다른 면보다 액정패널로부터 멀리 위치되는 액정표시장치.13. The liquid crystal display of claim 12, wherein the light guide plate includes an irregular reflector for scattering light provided on one of the surfaces disposed in parallel with the liquid crystal panel, and one of the surfaces is located farther from the liquid crystal panel than the other surface. 제12항에 있어서, 상기 발광면측을 정면으로 한 경우에, 상기 도광판의 배면측에 설치되어, 도광판으로부터 출사되는 광을 도광판의 내부로 향해 반사시키는 반사판을 더 포함하는 액정표시장치.13. The liquid crystal display device according to claim 12, further comprising a reflecting plate provided on the back side of the light guide plate to reflect the light emitted from the light guide plate toward the inside of the light guide plate when the light emitting surface side is faced. 제12항에 있어서, 상기 선형 광원으로부터 도광판으로 입사하는 방향과 다른 방향으로 조사되는 광을 상기 도광판을 향해 반사시키는 반사부재를 더 포함하는 액정표시장치.The liquid crystal display device of claim 12, further comprising a reflecting member reflecting light irradiated in a direction different from a direction of incidence from the linear light source to the light guide plate toward the light guide plate. 제12항에 있어서, 상기 도광판과 상기 집광판과의 사이에 위치되고, 광을 확산시키는 광확산시트를 더 포함하는 액정표시장치.The liquid crystal display device of claim 12, further comprising a light diffusion sheet positioned between the light guide plate and the light collecting plate to diffuse light. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950011853A 1994-05-11 1995-05-10 Illumination device and liquid crystal display device using it KR0166144B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP94-97411 1994-05-11
JP9741194 1994-05-11
JP7110738A JPH0829786A (en) 1994-05-11 1995-05-09 Illumination device and liquid crystal display device using it
JP95-110738 1995-05-09

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KR950033601A true KR950033601A (en) 1995-12-26
KR0166144B1 KR0166144B1 (en) 1999-03-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100398751B1 (en) * 1999-06-11 2003-09-19 다이니폰 인사츠 가부시키가이샤 Light diffusion film and method using the same
KR100660707B1 (en) * 2004-11-18 2006-12-21 엘지전자 주식회사 backlight unit

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KR100466091B1 (en) * 1996-09-09 2005-10-13 도레이새한 주식회사 Manufacturing method of LCD light diffusion film
KR100367845B1 (en) * 2000-06-07 2003-01-10 삼성전자 주식회사 Method for illuminating in liquid crystal display, back-light assembly for performing the same, and liquid crystal display using the same
JP2002124112A (en) * 2000-08-07 2002-04-26 Sharp Corp Backlight and liquid crystal display device
KR100891594B1 (en) * 2002-12-31 2009-04-03 엘지디스플레이 주식회사 Lcd back light assembly
KR100694516B1 (en) * 2005-06-16 2007-03-13 하이쎌(주) Back lighting module
TWI318172B (en) * 2005-11-23 2009-12-11 Eternal Chemical Co Ltd Optical thin sheet
WO2016088596A1 (en) * 2014-12-01 2016-06-09 シャープ株式会社 Liquid crystal display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100398751B1 (en) * 1999-06-11 2003-09-19 다이니폰 인사츠 가부시키가이샤 Light diffusion film and method using the same
KR100660707B1 (en) * 2004-11-18 2006-12-21 엘지전자 주식회사 backlight unit

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KR0166144B1 (en) 1999-03-20
JPH0829786A (en) 1996-02-02

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