TW200643563A - Liquid crystal display and backlight unit - Google Patents

Liquid crystal display and backlight unit

Info

Publication number
TW200643563A
TW200643563A TW095109267A TW95109267A TW200643563A TW 200643563 A TW200643563 A TW 200643563A TW 095109267 A TW095109267 A TW 095109267A TW 95109267 A TW95109267 A TW 95109267A TW 200643563 A TW200643563 A TW 200643563A
Authority
TW
Taiwan
Prior art keywords
liquid crystal
crystal panel
light
crystal display
light source
Prior art date
Application number
TW095109267A
Other languages
Chinese (zh)
Inventor
Tadahiro Ohmi
Kiwamu Takehisa
Yasuyuki Shirai
Naoki Tanahashi
Original Assignee
Univ Tohoku
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Tohoku filed Critical Univ Tohoku
Publication of TW200643563A publication Critical patent/TW200643563A/en

Links

Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough 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
    • G02B6/0033—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
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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

Landscapes

  • 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)
  • Planar Illumination Modules (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

In a large-sized liquid crystal display according to this invention, a light source of an optimum condition, which is excellent in efficiency, is disposed at an upper part or a lower part, or both of the upper and the lower part. Light is indirectly irradiated from a space left on a rear side of a liquid crystal panel. For this purpose, on the rear side of the liquid crystal panel, a reflector plate for reflecting the light from the light source to guide the light to the liquid crystal panel is installed with a space kept from the liquid crystal panel. This structure makes it possible to detach and exchange each light source from the large-sized liquid crystal display. Therefore, a lamp of a short lift can be used as each light source. According to this invention, it is possible to realize the large-sized liquid crystal panel which is light in weight, low in power consumption, and low in cost.
TW095109267A 2005-03-17 2006-03-17 Liquid crystal display and backlight unit TW200643563A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005076431A JP4852695B2 (en) 2005-03-17 2005-03-17 Liquid crystal display and backlight unit

Publications (1)

Publication Number Publication Date
TW200643563A true TW200643563A (en) 2006-12-16

Family

ID=36991741

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095109267A TW200643563A (en) 2005-03-17 2006-03-17 Liquid crystal display and backlight unit

Country Status (3)

Country Link
JP (1) JP4852695B2 (en)
TW (1) TW200643563A (en)
WO (1) WO2006098400A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4797161B2 (en) 2005-07-27 2011-10-19 国立大学法人東北大学 Backlight unit for LCD
JP5147250B2 (en) 2007-02-01 2013-02-20 パナソニック液晶ディスプレイ株式会社 Liquid crystal display
KR101488042B1 (en) * 2007-05-20 2015-01-29 쓰리엠 이노베이티브 프로퍼티즈 컴파니 Design parameters for thin hollow cavity backlights of the light-recycling type
CN104197247A (en) * 2007-12-18 2014-12-10 皇家飞利浦电子股份有限公司 Illumination system, luminaire and backlighting unit
CN102057319B (en) 2008-06-04 2014-02-26 3M创新有限公司 Hollow backlight with tilted light source
KR100959660B1 (en) * 2008-06-09 2010-05-26 주식회사 루멘스 Surface emitting device
JP6012924B2 (en) * 2010-12-22 2016-10-25 大日本印刷株式会社 Optical module and display device
JP5678750B2 (en) * 2011-03-17 2015-03-04 大日本印刷株式会社 Optical module and display device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08146224A (en) * 1994-11-21 1996-06-07 Kyocera Corp Liquid crystal display device
JPH095737A (en) * 1995-06-19 1997-01-10 Canon Inc Backlight device and liquid crystal display device provided with the back light device
JPH0915599A (en) * 1995-06-28 1997-01-17 Opt Kikaku Kaihatsu Kk Illuminator
JPH1097806A (en) * 1996-06-21 1998-04-14 Sharp Corp Lighting equipment
JP3036474B2 (en) * 1997-07-25 2000-04-24 日本電気株式会社 Backlight device

Also Published As

Publication number Publication date
JP4852695B2 (en) 2012-01-11
JP2006260924A (en) 2006-09-28
WO2006098400A1 (en) 2006-09-21

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