WO2006028719A3 - Light box - Google Patents

Light box Download PDF

Info

Publication number
WO2006028719A3
WO2006028719A3 PCT/US2005/030253 US2005030253W WO2006028719A3 WO 2006028719 A3 WO2006028719 A3 WO 2006028719A3 US 2005030253 W US2005030253 W US 2005030253W WO 2006028719 A3 WO2006028719 A3 WO 2006028719A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
cavity
light source
face
luminaire
Prior art date
Application number
PCT/US2005/030253
Other languages
French (fr)
Other versions
WO2006028719A2 (en
Inventor
Marcella L Pesenti
Original Assignee
3M Innovative Properties Co
Marcella L Pesenti
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, Marcella L Pesenti filed Critical 3M Innovative Properties Co
Priority to EP05790301A priority Critical patent/EP1784808A2/en
Publication of WO2006028719A2 publication Critical patent/WO2006028719A2/en
Publication of WO2006028719A3 publication Critical patent/WO2006028719A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • 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
    • G02B6/005—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
    • G02B6/0051—Diffusing 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
    • G02B6/0058—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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A luminaire (1) includes an optical cavity (10) having first and second opposed major faces (7, 9); and at least one elongate light source (13) arranged to direct light into the cavity from one side. The first major face (9) comprises a prismatic micro-structured material to reflect part of the light from the light source back into the cavity and to refract part of the light from the light source out of the cavity through the first major face, and the second major face (7) comprises a reflective material to reflect light from the light source back into the cavity. To enable the luminaire to present a uniform illuminated appearance and also provide a uniform diffuse light output, the front face (5) of the luminaire comprises a sheet of translucent light-diffusing material (for example, a graphics sign face material) positioned parallel to, but set apart from, the first major face of the optical cavity (10).
PCT/US2005/030253 2004-09-01 2005-08-25 Light box WO2006028719A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05790301A EP1784808A2 (en) 2004-09-01 2005-08-25 Light box

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0419391.8A GB0419391D0 (en) 2004-09-01 2004-09-01 Luminaire comprising a light box
GB0419391.8 2004-09-01

Publications (2)

Publication Number Publication Date
WO2006028719A2 WO2006028719A2 (en) 2006-03-16
WO2006028719A3 true WO2006028719A3 (en) 2006-05-04

Family

ID=33155839

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/030253 WO2006028719A2 (en) 2004-09-01 2005-08-25 Light box

Country Status (3)

Country Link
EP (1) EP1784808A2 (en)
GB (1) GB0419391D0 (en)
WO (1) WO2006028719A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103486535A (en) * 2013-10-21 2014-01-01 广州市松叶电子科技有限公司 LED (light-emitting diode) light source fluorescent powder light matching plate

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293182A2 (en) * 1987-05-26 1988-11-30 Minnesota Mining And Manufacturing Company Light fixture providing normalized output
EP0377309A2 (en) * 1989-01-03 1990-07-11 Minnesota Mining And Manufacturing Company Back-lit display
EP0595669A1 (en) * 1992-10-01 1994-05-04 Minnesota Mining And Manufacturing Company Flexible optically uniform sign face substrate
DE4442351A1 (en) * 1994-11-29 1996-05-30 Thoca Geraetebau Gmbh Light box, e.g. for through illumination of transparent film or foil, e.g. for medical evaluation of X=ray images
GB2310525A (en) * 1996-02-24 1997-08-27 Ronnie Revell Illuminated display device
DE29609245U1 (en) * 1996-05-23 1997-09-25 Trautwein Gmbh & Co, 45659 Recklinghausen Advertising order
US6167646B1 (en) * 1996-03-04 2001-01-02 William R. Brauer Apparatus for illuminating medical diagnostic imaging film with enhanced viewability
WO2001071248A1 (en) * 2000-03-16 2001-09-27 3M Innovative Properties Company Light guides suitable for illuminated displays

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4039291A1 (en) 1990-12-08 1992-06-11 Minnesota Mining & Mfg LIGHTBOX

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0293182A2 (en) * 1987-05-26 1988-11-30 Minnesota Mining And Manufacturing Company Light fixture providing normalized output
EP0377309A2 (en) * 1989-01-03 1990-07-11 Minnesota Mining And Manufacturing Company Back-lit display
EP0595669A1 (en) * 1992-10-01 1994-05-04 Minnesota Mining And Manufacturing Company Flexible optically uniform sign face substrate
DE4442351A1 (en) * 1994-11-29 1996-05-30 Thoca Geraetebau Gmbh Light box, e.g. for through illumination of transparent film or foil, e.g. for medical evaluation of X=ray images
GB2310525A (en) * 1996-02-24 1997-08-27 Ronnie Revell Illuminated display device
US6167646B1 (en) * 1996-03-04 2001-01-02 William R. Brauer Apparatus for illuminating medical diagnostic imaging film with enhanced viewability
DE29609245U1 (en) * 1996-05-23 1997-09-25 Trautwein Gmbh & Co, 45659 Recklinghausen Advertising order
WO2001071248A1 (en) * 2000-03-16 2001-09-27 3M Innovative Properties Company Light guides suitable for illuminated displays

Also Published As

Publication number Publication date
WO2006028719A2 (en) 2006-03-16
EP1784808A2 (en) 2007-05-16
GB0419391D0 (en) 2004-10-06

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