WO2011019785A1 - Lightguide - Google Patents

Lightguide Download PDF

Info

Publication number
WO2011019785A1
WO2011019785A1 PCT/US2010/045115 US2010045115W WO2011019785A1 WO 2011019785 A1 WO2011019785 A1 WO 2011019785A1 US 2010045115 W US2010045115 W US 2010045115W WO 2011019785 A1 WO2011019785 A1 WO 2011019785A1
Authority
WO
WIPO (PCT)
Prior art keywords
lightguide
flexible unitary
microns
pattern
region
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.)
Ceased
Application number
PCT/US2010/045115
Other languages
English (en)
French (fr)
Inventor
Jeffrey L. Solomon
Brian A. Kinder
Gary T. Boyd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to CN2010800358948A priority Critical patent/CN102472865A/zh
Priority to US13/389,713 priority patent/US8882323B2/en
Priority to JP2012524826A priority patent/JP2013502043A/ja
Priority to KR1020127006231A priority patent/KR101777885B1/ko
Priority to EP10743310A priority patent/EP2464996A1/en
Publication of WO2011019785A1 publication Critical patent/WO2011019785A1/en
Anticipated expiration legal-status Critical
Priority to US14/537,308 priority patent/US9684119B2/en
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/0074—Production of other optical elements not provided for in B29D11/00009- B29D11/0073
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
    • C03B11/06—Construction of plunger or mould
    • C03B11/08—Construction of plunger or mould for making solid articles, e.g. lenses
    • C03B11/082—Construction of plunger or mould for making solid articles, e.g. lenses having profiled, patterned or microstructured 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
    • G02B6/0015—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
    • G02B6/0013—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
    • G02B6/0033—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
    • G02B6/0033—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
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G02B6/0035—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
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package

Definitions

  • FIG. 7 is a schematic top-view of a portion of a light source
  • FIG. 10 is an optical micrograph of a structured input side of a lightguide
  • the average thickness of lightguide 110 is in a range from about 50 microns to about 800 microns, or from about 100 microns to about 600 microns, or from about 100 microns to about 500 microns. In some cases, the average thickness of lightguide 110 is less than about 800 microns near structured input side 120 and less than about 700 microns near distal side 122, or less than about 700 microns near structured input side 120 and less than about 600 microns near distal side 122, or less than about 600 microns near structured input side 120 and less than about 500 microns near distal side 122, or less than about 500 microns near structured input side 120 and less than about 400 microns near distal side 122, or less than about 400 microns near structured input side 120 and less than about 300 microns near distal side 122. In some cases, the average thickness of lightguide 110 is about 350 microns near structured input side 120 and about 250 microns near distal side 122.
  • larger features 177 include a plurality of depressions 177A and a plurality of protrusions 177B.
  • larger features 177 can have a plurality of protrusions and/or a plurality of depressions, such as, for example, a plurality of linear protrusions and/or a plurality of linear depressions extending along the thickness direction (z-direction) of the lightguide.
  • FIG. 3 is a schematic top- view of a portion of a light source 300 that includes a structured input side 320 that includes a first pattern 370 that includes smaller features 372 superimposed on a second pattern 375 that includes larger features 377.
  • Light source 300 is similar to light source 100 except that larger features 377 include a plurality of depressions 377 A, but do not include any protrusions.
  • each discrete light extractor in plurality of light extractors 142 is a portion of the same three-dimensional body.
  • each discrete light extractor in plurality of light extractors 142 can be a portion of a three-dimensional body 600 shown schematically in FIG. 6, where body 600 can be, for example, a portion of an ellipsoid.
  • some of the light extractors can be portion 610 of body 600, some other light extractors can be portion 620 of body 600, and still some other light extractors can be portion 630 of body 600.
  • Exemplary three-dimensional bodies include spheres, spheroids, egg-shape or ovoids, and pyramids.
  • the base of a light extractor 142 has a size ai along the length of the lightguide (x-direction) and a size bi along the width of the lightguide (y-direction), where in general, the length of the lightguide is in a direction that is normal to structured input side 120 and the width of the lightguide is in a direction that is parallel to the structured input side.
  • ai and bi are substantially equal.
  • the base can, for example, be a circle or a square.
  • each of ai and bi is less than about 500 microns, or less than about 400 microns, or less than about 300 microns, or less than about 200 microns.
  • the back reflector can be an aluminized film or a multi-layer polymeric reflective film, such as an enhanced specular reflector (ESR) film (available from 3M Company, St. Paul, MN).
  • ESR enhanced specular reflector
  • back reflector 530 can be a diffuse reflector having a white appearance.
  • light guide material 835 can be a liquid that is solidified by, for example, heat or radiation, after the replication process and before tools 820 and 830 are removed.
  • the replication step is expedited by softening lightguide material 835 by, for example, increasing the temperature of the lightguide material above the glass transition temperature of the lightguide material. In such cases, the temperature of the lightguide material is reduced after the replication process and before tools 820 and 830 are removed.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
PCT/US2010/045115 2009-08-12 2010-08-11 Lightguide Ceased WO2011019785A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN2010800358948A CN102472865A (zh) 2009-08-12 2010-08-11 光导
US13/389,713 US8882323B2 (en) 2009-08-12 2010-08-11 Lightguide
JP2012524826A JP2013502043A (ja) 2009-08-12 2010-08-11 ライトガイド
KR1020127006231A KR101777885B1 (ko) 2009-08-12 2010-08-11 도광체
EP10743310A EP2464996A1 (en) 2009-08-12 2010-08-11 Lightguide
US14/537,308 US9684119B2 (en) 2009-08-12 2014-11-10 Lightguide

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23322609P 2009-08-12 2009-08-12
US61/233,226 2009-08-12

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US13/389,713 A-371-Of-International US8882323B2 (en) 2009-08-12 2010-08-11 Lightguide
US14/537,308 Division US9684119B2 (en) 2009-08-12 2014-11-10 Lightguide

Publications (1)

Publication Number Publication Date
WO2011019785A1 true WO2011019785A1 (en) 2011-02-17

Family

ID=42946617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/045115 Ceased WO2011019785A1 (en) 2009-08-12 2010-08-11 Lightguide

Country Status (6)

Country Link
US (2) US8882323B2 (enExample)
EP (1) EP2464996A1 (enExample)
JP (1) JP2013502043A (enExample)
KR (1) KR101777885B1 (enExample)
CN (1) CN102472865A (enExample)
WO (1) WO2011019785A1 (enExample)

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GB2480757A (en) * 2010-05-24 2011-11-30 Design Led Products Ltd Light guide with first and second inerleaved extraction features
CN103064144A (zh) * 2011-10-24 2013-04-24 鸿富锦精密工业（深圳）有限公司 导光板及发光装置
EP2770250A1 (en) * 2013-02-25 2014-08-27 Minebea Co. Ltd. Spread illumination apparatus with tapered input region
EP2696131A4 (en) * 2011-04-04 2015-02-25 Sakamoto Jun LIGHT GUIDE PLATE, METHOD FOR PRODUCING THE LIGHT GUIDE PLATE AND DEVICE FOR PRODUCING THE LIGHT GUIDE PLATE
EP2410239A3 (en) * 2010-07-20 2015-10-07 National Cheng Kung University Method for manufacturing a flexible optical plate, product and backlight module made therewith
WO2016183148A1 (en) * 2015-05-13 2016-11-17 Corning Incorporated Light guides with reduced hot spots and methods for making the same
US9535204B2 (en) 2014-02-12 2017-01-03 Minebea Co., Ltd. Illumination apparatus having light guide plate with curvedly tapered light coupling portion
EP3608582A4 (en) * 2017-07-12 2020-05-13 Exaoptonix Inc. MULTIPLE LIGHTING ELEMENT AND THREE-DIMENSIONAL LIGHTING DEVICE USING THE SAME

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US20150061167A1 (en) 2015-03-05
KR101777885B1 (ko) 2017-09-12
US8882323B2 (en) 2014-11-11
US9684119B2 (en) 2017-06-20
CN102472865A (zh) 2012-05-23
KR20120048676A (ko) 2012-05-15
JP2013502043A (ja) 2013-01-17
US20120140518A1 (en) 2012-06-07
EP2464996A1 (en) 2012-06-20

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