WO2001027663A1 - Optical film with variable angle prisms - Google Patents

Optical film with variable angle prisms Download PDF

Info

Publication number
WO2001027663A1
WO2001027663A1 PCT/US2000/024355 US0024355W WO0127663A1 WO 2001027663 A1 WO2001027663 A1 WO 2001027663A1 US 0024355 W US0024355 W US 0024355W WO 0127663 A1 WO0127663 A1 WO 0127663A1
Authority
WO
WIPO (PCT)
Prior art keywords
prisms
prism
recited
turning film
configuration
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/US2000/024355
Other languages
English (en)
French (fr)
Inventor
Mark E. Gardiner
Sanford Cobb
Kenneth A. Epstein
Wade D. Kretman
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 AU73493/00A priority Critical patent/AU7349300A/en
Priority to JP2001530619A priority patent/JP2003511735A/ja
Priority to EP00961552A priority patent/EP1218776A1/en
Publication of WO2001027663A1 publication Critical patent/WO2001027663A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • 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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • G02B6/0013—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
    • G02B6/0045—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
    • G02B6/005—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
    • 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
    • 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
    • G02B6/007—Incandescent lamp or gas discharge lamp
    • G02B6/0071—Incandescent lamp or gas discharge lamp with elongated shape, e.g. tube

Definitions

  • the invention relates generally to light trans issive optical films, and more particularly, the invention relates to an optical film with an array of variable angle prisms.
  • the prism configurations are also influenced by the refractive index of the optically transmissive film due to the effects on the refraction face and the TIR at the reflection face.
  • Typical film material may have an index in the range of 1.35-1.75.
  • a prism configuration with a nominal included angle of 68.9° may be used.
  • a lightguide 52 forms a portion of the illuminating device 50 and includes a first entrance surface 54, a second entrance surface 56, an output surface 58 and a back surface 60.
  • a first light source 62 includes a first light source reflector 64 and couples to the first entrance surface 54.
  • a second light source 66 includes a second light source reflector 68 and couples to the second entrance surface.
  • Disposed adjacent the output surface 58 is a first light redirecting element 70.
  • the first light redirecting element 70 includes an input surface 72 and an output surface 74.
  • the illumination device 50 further includes a reflector 76 adjacent the back surface 60, a second light redirecting element 78 and a reflective polarizer 80.
  • the array of prisms formed on the input surface 72 of the light redirecting structure 70 may be altered at a corresponding center portion 84 to reduce this perceived optical defect in a manner similar to that by which the array reduces perceived ripple.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)
PCT/US2000/024355 1999-10-08 2000-09-01 Optical film with variable angle prisms Ceased WO2001027663A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU73493/00A AU7349300A (en) 1999-10-08 2000-09-01 Optical film with variable angle prisms
JP2001530619A JP2003511735A (ja) 1999-10-08 2000-09-01 さまざまな角度のプリズムを備えた光学フィルム
EP00961552A EP1218776A1 (en) 1999-10-08 2000-09-01 Optical film with variable angle prisms

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/415,873 1999-10-08
US09/415,873 US6356391B1 (en) 1999-10-08 1999-10-08 Optical film with variable angle prisms

Publications (1)

Publication Number Publication Date
WO2001027663A1 true WO2001027663A1 (en) 2001-04-19

Family

ID=23647565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/024355 Ceased WO2001027663A1 (en) 1999-10-08 2000-09-01 Optical film with variable angle prisms

Country Status (7)

Country Link
US (3) US6356391B1 (enExample)
EP (1) EP1218776A1 (enExample)
JP (1) JP2003511735A (enExample)
KR (1) KR100867160B1 (enExample)
CN (1) CN1171100C (enExample)
AU (1) AU7349300A (enExample)
WO (1) WO2001027663A1 (enExample)

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US6854855B2 (en) 1999-12-02 2005-02-15 Reflexite Corporation Asymmetric alternating prism arrays
US6862141B2 (en) 2002-05-20 2005-03-01 General Electric Company Optical substrate and method of making
US6891677B2 (en) 1999-11-12 2005-05-10 Reflexite Corporation Subwavelength optical microstructure light-redirecting films
US6952627B2 (en) 2002-12-18 2005-10-04 General Electric Company Method and apparatus for fabricating light management substrates
WO2006064259A1 (en) 2004-12-16 2006-06-22 Microsharp Corporation Limited Structured optical film
US7125131B2 (en) 2002-12-06 2006-10-24 General Electric Company Brightness enhancement film with improved view angle
US7180672B2 (en) 2002-05-20 2007-02-20 General Electric Company Optical substrate and method of making
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US7248412B2 (en) 2003-12-31 2007-07-24 General Electric Company Optical substrate with modulated structure
US7251079B2 (en) 2003-02-28 2007-07-31 General Electric Company Brightness enhancement film, and methods of making and using the same
US7341784B2 (en) 2004-09-10 2008-03-11 General Electric Company Light management film and its preparation and use
US7418202B2 (en) 2005-08-04 2008-08-26 3M Innovative Properties Company Article having a birefringent surface and microstructured features having a variable pitch or angles for use as a blur filter
EP1779162A4 (en) * 2004-08-10 2008-09-10 Solid State Opto Ltd METHODS OF CUTTING OR FORMING CAVITIES IN A SUBSTRATE USED TO MANUFACTURE OPTICAL FILMS, COMPONENTS OR WAVEGUIDES
US7583331B2 (en) 2004-07-27 2009-09-01 Dolby Laboratories Licensing Corporation Diffuser for light from light source array and displays incorporating same
WO2010059578A3 (en) * 2008-11-21 2010-08-12 3M Innovative Properties Company Stereoscopic 3d liquid crystal display with graded light guide light extraction features
US9134471B2 (en) 2006-06-28 2015-09-15 3M Innovative Properties Company Oriented polymeric articles and method
CN106391508A (zh) * 2016-08-31 2017-02-15 合肥泰禾光电科技股份有限公司 一种用于色选机的自带背光源的相机对准工装
US9711111B2 (en) 2008-06-25 2017-07-18 Dolby Laboratories Licensing Corporation High dynamic range display using LED backlighting, stacked optical films, and LCD drive signals based on a low resolution light field simulation

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US20030112521A1 (en) 2003-06-19
US6707611B2 (en) 2004-03-16
CN1378653A (zh) 2002-11-06
US6356391B1 (en) 2002-03-12
KR20020041819A (ko) 2002-06-03
KR100867160B1 (ko) 2008-11-06
AU7349300A (en) 2001-04-23
US6560026B2 (en) 2003-05-06
US20020057497A1 (en) 2002-05-16
CN1171100C (zh) 2004-10-13
EP1218776A1 (en) 2002-07-03

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