WO2004031818A3 - Light source assembly and light-guide light suitable for an illuminated display - Google Patents

Light source assembly and light-guide light suitable for an illuminated display Download PDF

Info

Publication number
WO2004031818A3
WO2004031818A3 PCT/US2003/026655 US0326655W WO2004031818A3 WO 2004031818 A3 WO2004031818 A3 WO 2004031818A3 US 0326655 W US0326655 W US 0326655W WO 2004031818 A3 WO2004031818 A3 WO 2004031818A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
light source
optical cavity
housing
face
Prior art date
Application number
PCT/US2003/026655
Other languages
French (fr)
Other versions
WO2004031818A2 (en
Inventor
Michael C Lea
Original Assignee
3M Innovative Properties Co
Michael C Lea
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, Michael C Lea filed Critical 3M Innovative Properties Co
Priority to AU2003260076A priority Critical patent/AU2003260076A1/en
Publication of WO2004031818A2 publication Critical patent/WO2004031818A2/en
Publication of WO2004031818A3 publication Critical patent/WO2004031818A3/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

A light-guide light suitable for use in an illuminated display has a housing (3) defining a light-guiding optical cavity having first and second generally parallel major faces (5, 6), and at least one light source (11) arranged to direct visible light into the cavity from one side, to be guided between the first and second major faces and emitted through at least one of them. The light source (11) is an elongate source that extends along the length of the said one side of the optical cavity and has an elongate housing (40) that may comprise a back portion (42) to the rear of the light source, and two diverging flat sides (42) each of which extends from a respective front edge of the back portion towards the adjacent edge of a respective one of the said major faces to define an exit aperture from the light source housing into the optical cavity. The back portion and sides of the light source housing have reflective internal surfaces and function to reduce the spread of the light from the elongate source in a plane perpendicular to the major faces of the optical cavity. Each light-emitting major face of the optical cavity may comprises a first transparent, planar, sheet of material (23) that is co-extensive with the major face and at least one further transparent, planar, sheet of material (23A) that extends only part of the way across the major face, from the side adjacent the light source (11); the sheets being disposed face-to-face against, but not in optical contact with, one another.
PCT/US2003/026655 2002-10-02 2003-08-25 Light source assembly and light-guide light suitable for an illuminated display WO2004031818A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003260076A AU2003260076A1 (en) 2002-10-02 2003-08-25 Light source assembly and light-guide light suitable for an illuminated display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0222810A GB0222810D0 (en) 2002-10-02 2002-10-02 Light source assembly and light-guide light suitable for an illuminated display
GB0222810.4 2002-10-02

Publications (2)

Publication Number Publication Date
WO2004031818A2 WO2004031818A2 (en) 2004-04-15
WO2004031818A3 true WO2004031818A3 (en) 2004-10-07

Family

ID=9945153

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/026655 WO2004031818A2 (en) 2002-10-02 2003-08-25 Light source assembly and light-guide light suitable for an illuminated display

Country Status (3)

Country Link
AU (1) AU2003260076A1 (en)
GB (1) GB0222810D0 (en)
WO (1) WO2004031818A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8848132B2 (en) 2008-02-07 2014-09-30 3M Innovative Properties Company Hollow backlight with structured films
US8926159B2 (en) 2007-05-20 2015-01-06 3M Innovative Properties Company Thin hollow backlights with beneficial design characteristics
US9541698B2 (en) 2008-02-22 2017-01-10 3M Innovative Properties Company Backlights having selected output light flux distributions and display systems using same

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2401983A (en) * 2003-04-09 2004-11-24 Powergraphic Displays Ltd Illuminated display apparatus
CN101681053B (en) 2007-05-20 2012-03-21 3M创新有限公司 Recycling backlights with semi-specular components
WO2008144650A1 (en) 2007-05-20 2008-11-27 3M Innovative Properties Company Collimating light injectors for edge-lit backlights
WO2009080115A1 (en) * 2007-12-21 2009-07-02 Born Cornelis Mr A lamp assembly and a light guiding member
US10960357B2 (en) 2018-04-23 2021-03-30 Noria Water Technologies, Inc. Method and apparatus for real-time direct membrane monitoring

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269105A (en) * 1987-04-27 1988-11-07 Mitsui Toatsu Chem Inc Plate-like optical transmitter obtaining plane-like light source
US5671994A (en) * 1994-06-08 1997-09-30 Clio Technologies, Inc. Flat and transparent front-lighting system using microprisms
EP1085252A2 (en) * 1999-09-17 2001-03-21 Siteco Beleuchtungstechnik GmbH Light guide luminaire comprising improved shielding means
US6208466B1 (en) * 1998-11-25 2001-03-27 3M Innovative Properties Company Multilayer reflector with selective transmission
US6259496B1 (en) * 1998-06-12 2001-07-10 Dai Nippon Printing Co., Ltd. Backlight device and light transmission type display apparatus
WO2002048606A2 (en) * 2000-12-11 2002-06-20 3M Innovative Properties Company Luminaire comprising an elongate light source and a back reflector
WO2003100481A1 (en) * 2002-05-23 2003-12-04 3M Innovative Properties Company Surface light-emitting device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63269105A (en) * 1987-04-27 1988-11-07 Mitsui Toatsu Chem Inc Plate-like optical transmitter obtaining plane-like light source
US5671994A (en) * 1994-06-08 1997-09-30 Clio Technologies, Inc. Flat and transparent front-lighting system using microprisms
US6259496B1 (en) * 1998-06-12 2001-07-10 Dai Nippon Printing Co., Ltd. Backlight device and light transmission type display apparatus
US6208466B1 (en) * 1998-11-25 2001-03-27 3M Innovative Properties Company Multilayer reflector with selective transmission
EP1085252A2 (en) * 1999-09-17 2001-03-21 Siteco Beleuchtungstechnik GmbH Light guide luminaire comprising improved shielding means
WO2002048606A2 (en) * 2000-12-11 2002-06-20 3M Innovative Properties Company Luminaire comprising an elongate light source and a back reflector
WO2003100481A1 (en) * 2002-05-23 2003-12-04 3M Innovative Properties Company Surface light-emitting device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 087 (P - 835) 28 February 1989 (1989-02-28) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8926159B2 (en) 2007-05-20 2015-01-06 3M Innovative Properties Company Thin hollow backlights with beneficial design characteristics
US8848132B2 (en) 2008-02-07 2014-09-30 3M Innovative Properties Company Hollow backlight with structured films
US9541698B2 (en) 2008-02-22 2017-01-10 3M Innovative Properties Company Backlights having selected output light flux distributions and display systems using same

Also Published As

Publication number Publication date
WO2004031818A2 (en) 2004-04-15
AU2003260076A1 (en) 2004-04-23
GB0222810D0 (en) 2002-11-06

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