CA2352949A1 - Illuminator, illuminating device, front light, and liquid crystal display - Google Patents
Illuminator, illuminating device, front light, and liquid crystal display Download PDFInfo
- Publication number
- CA2352949A1 CA2352949A1 CA002352949A CA2352949A CA2352949A1 CA 2352949 A1 CA2352949 A1 CA 2352949A1 CA 002352949 A CA002352949 A CA 002352949A CA 2352949 A CA2352949 A CA 2352949A CA 2352949 A1 CA2352949 A1 CA 2352949A1
- Authority
- CA
- Canada
- Prior art keywords
- light
- liquid crystal
- crystal display
- incident
- emitting source
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
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
- G02F1/133—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
-
- 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
- G02B6/0028—Light guide, e.g. taper
-
- 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
- G02B6/0035—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
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the 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
- G02B6/0035—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
- G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
-
- 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
-
- 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
- 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
- G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
- G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
-
- 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
- G02F1/133616—Front illuminating devices
-
- 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
- G02F2203/02—Function characteristic reflective
Abstract
A front light (100) and a reflecting liquid crystal display of the present invention includes a dot light emitting source (101), and a light guiding body (104) having a light incident surface (104a) to which light from the dot light emitting source (101) is incident and a light outgoing surface (104b) from which the incident light outgoes, and light from the dot light emitting source (101) is in a linearly emitting state at least when incident onto the light incident surface (104a). By so doing, it is possible to provide bright, inexpensive, low-power consuming front light (100) and reflecting liquid crystal display which do not cause shadows or a moire fringe from the dot light emitting source (101), or a light-dark difference in luminance.
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33745698 | 1998-11-27 | ||
JP10/337456 | 1998-11-27 | ||
JP11/38257 | 1999-02-17 | ||
JP3825799 | 1999-02-17 | ||
PCT/JP1999/006548 WO2000032981A1 (en) | 1998-11-27 | 1999-11-24 | Illuminator, illuminating device, front light, and liquid crystal display |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2352949A1 true CA2352949A1 (en) | 2000-06-08 |
CA2352949C CA2352949C (en) | 2006-02-21 |
Family
ID=26377471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002352949A Expired - Fee Related CA2352949C (en) | 1998-11-27 | 1999-11-24 | Illuminator, illuminating device, front light, and liquid crystal display |
Country Status (8)
Country | Link |
---|---|
US (1) | US6940570B1 (en) |
EP (2) | EP1134488A4 (en) |
JP (1) | JP3810636B2 (en) |
KR (1) | KR100419373B1 (en) |
CN (3) | CN1877191B (en) |
CA (1) | CA2352949C (en) |
TW (1) | TW457468B (en) |
WO (1) | WO2000032981A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1217290A1 (en) * | 2000-12-22 | 2002-06-26 | Nec Corporation | Light unit using point light source, and liquid crystal display using the same light unit |
Families Citing this family (74)
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JP2001319515A (en) * | 2000-05-11 | 2001-11-16 | Sanyo Electric Co Ltd | Illumination apparatus and display |
KR100706752B1 (en) * | 2000-08-09 | 2007-04-11 | 삼성전자주식회사 | A reflection-type liquid crystal display device |
JP2002109938A (en) * | 2000-09-29 | 2002-04-12 | Sanyo Electric Co Ltd | Lighting device and display device |
GB0024945D0 (en) * | 2000-10-11 | 2000-11-29 | Screen Technology Ltd | Beam expansion |
JP2003031017A (en) * | 2001-07-13 | 2003-01-31 | Minebea Co Ltd | Planar lighting device |
TW556008B (en) | 2001-08-01 | 2003-10-01 | Samsung Electronics Co Ltd | Light guided panel and liquid crystal display device using the same and method for displaying picture using the same |
JP4671562B2 (en) * | 2001-08-31 | 2011-04-20 | 富士通株式会社 | Illumination device and liquid crystal display device |
JP4162900B2 (en) * | 2002-02-05 | 2008-10-08 | アルプス電気株式会社 | Illumination device and liquid crystal display device |
JP4125016B2 (en) * | 2002-02-06 | 2008-07-23 | アルプス電気株式会社 | Illumination device and liquid crystal display device |
JP2003242818A (en) * | 2002-02-13 | 2003-08-29 | Alps Electric Co Ltd | Surface light emitting device and liquid crystal display device |
CN100406988C (en) * | 2002-10-16 | 2008-07-30 | 胜华科技股份有限公司 | Light conducting structure of negative module |
TWI289708B (en) | 2002-12-25 | 2007-11-11 | Qualcomm Mems Technologies Inc | Optical interference type color display |
JP4161713B2 (en) * | 2002-12-27 | 2008-10-08 | カシオ計算機株式会社 | Surface lighting device |
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KR100567249B1 (en) | 2003-09-06 | 2006-04-03 | 현대모비스 주식회사 | Light guide plate for liquid crystal display back light and liquid crystal display module of car audio in use with the light guide plate |
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- 1999-11-24 US US09/856,657 patent/US6940570B1/en not_active Expired - Lifetime
- 1999-11-24 JP JP2000585585A patent/JP3810636B2/en not_active Expired - Fee Related
- 1999-11-24 EP EP99973111A patent/EP1134488A4/en not_active Withdrawn
- 1999-11-24 EP EP06009454A patent/EP1698918A1/en not_active Withdrawn
- 1999-11-24 KR KR10-2001-7006609A patent/KR100419373B1/en not_active IP Right Cessation
- 1999-11-24 WO PCT/JP1999/006548 patent/WO2000032981A1/en active IP Right Grant
- 1999-11-24 CA CA002352949A patent/CA2352949C/en not_active Expired - Fee Related
- 1999-11-24 CN CN2006101006053A patent/CN1877191B/en not_active Expired - Lifetime
- 1999-11-24 CN CNB998158771A patent/CN1134607C/en not_active Expired - Lifetime
- 1999-11-24 CN CNB031452620A patent/CN100349052C/en not_active Expired - Lifetime
- 1999-11-25 TW TW088120609A patent/TW457468B/en not_active IP Right Cessation
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1217290A1 (en) * | 2000-12-22 | 2002-06-26 | Nec Corporation | Light unit using point light source, and liquid crystal display using the same light unit |
Also Published As
Publication number | Publication date |
---|---|
EP1698918A1 (en) | 2006-09-06 |
CN1334910A (en) | 2002-02-06 |
KR20010086054A (en) | 2001-09-07 |
WO2000032981A9 (en) | 2001-04-05 |
JP3810636B2 (en) | 2006-08-16 |
CN1134607C (en) | 2004-01-14 |
EP1134488A1 (en) | 2001-09-19 |
CN1877191A (en) | 2006-12-13 |
CN100349052C (en) | 2007-11-14 |
CA2352949C (en) | 2006-02-21 |
WO2000032981A1 (en) | 2000-06-08 |
EP1134488A4 (en) | 2002-06-12 |
KR100419373B1 (en) | 2004-02-21 |
TW457468B (en) | 2001-10-01 |
CN1480771A (en) | 2004-03-10 |
CN1877191B (en) | 2011-08-17 |
US6940570B1 (en) | 2005-09-06 |
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