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WO2013012564A3 - Coextruded optical sheet - Google Patents

Coextruded optical sheet Download PDF

Info

Publication number
WO2013012564A3
WO2013012564A3 PCT/US2012/045506 US2012045506W WO2013012564A3 WO 2013012564 A3 WO2013012564 A3 WO 2013012564A3 US 2012045506 W US2012045506 W US 2012045506W WO 2013012564 A3 WO2013012564 A3 WO 2013012564A3
Authority
WO
WIPO (PCT)
Prior art keywords
materials
optical sheet
coextruded
light
different
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/US2012/045506
Other languages
French (fr)
Other versions
WO2013012564A2 (en
Inventor
Moris Amon
Fumitomo Hide
Alexey TITOV
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.)
Rambus Inc
Original Assignee
Rambus Inc
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 Rambus Inc filed Critical Rambus Inc
Publication of WO2013012564A2 publication Critical patent/WO2013012564A2/en
Publication of WO2013012564A3 publication Critical patent/WO2013012564A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0041—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided in the bulk 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
    • 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
    • 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
    • G02B6/0075—Arrangements of multiple light guides
    • G02B6/0076—Stacked arrangements of multiple light guides of the same or different cross-sectional area

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A coextruded optical sheet includes layers of materials having different optical properties. The materials vary in relative amounts in a transverse direction of the optical sheet, orthogonal to a machine direction in which the optical sheet is extruded. The different optical properties are due to different concentrations of light-redirecting elements in the materials, for example, by using light-redirecting elements, such as light-redirecting particles, in one of the materials and not in the other of the materials. The optical sheet may be coextruded from a suitable extrusion die, from supplies of the materials.
PCT/US2012/045506 2011-07-20 2012-07-05 Coextruded optical sheet Ceased WO2013012564A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161509737P 2011-07-20 2011-07-20
US61/509,737 2011-07-20

Publications (2)

Publication Number Publication Date
WO2013012564A2 WO2013012564A2 (en) 2013-01-24
WO2013012564A3 true WO2013012564A3 (en) 2013-03-07

Family

ID=47558661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2012/045506 Ceased WO2013012564A2 (en) 2011-07-20 2012-07-05 Coextruded optical sheet

Country Status (2)

Country Link
TW (1) TW201304943A (en)
WO (1) WO2013012564A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019118358A1 (en) * 2019-07-08 2021-01-14 Lars Mundin Area light, method for producing the area light
CN114729739B (en) * 2019-11-19 2025-02-25 三菱电机株式会社 Light diffuser, lighting fixture, and method for manufacturing light diffuser
KR20230081059A (en) * 2021-11-30 2023-06-07 코닝 인코포레이티드 A light guide plate, a lighting apparatus including the same, and a method for manufacturing the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11345512A (en) * 1998-06-02 1999-12-14 Hayashi Telempu Co Ltd Surface light source device
JP2001110220A (en) * 1999-10-06 2001-04-20 Hayashi Telempu Co Ltd Planar lighting device
US20060210776A1 (en) * 2005-03-17 2006-09-21 Solutia, Inc. Sound reducing wedge shaped polymer interlayers
WO2007139282A1 (en) * 2006-05-30 2007-12-06 Lg Chem, Ltd. Multi-layered light diffusion plate and liquid crystal display device comprising the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11345512A (en) * 1998-06-02 1999-12-14 Hayashi Telempu Co Ltd Surface light source device
JP2001110220A (en) * 1999-10-06 2001-04-20 Hayashi Telempu Co Ltd Planar lighting device
US20060210776A1 (en) * 2005-03-17 2006-09-21 Solutia, Inc. Sound reducing wedge shaped polymer interlayers
WO2007139282A1 (en) * 2006-05-30 2007-12-06 Lg Chem, Ltd. Multi-layered light diffusion plate and liquid crystal display device comprising the same

Also Published As

Publication number Publication date
TW201304943A (en) 2013-02-01
WO2013012564A2 (en) 2013-01-24

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