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Improvements in and relating to backlit displays

Info

Publication number
WO2005026611A3
WO2005026611A3 PCT/GB2004/003971 GB2004003971W WO2005026611A3 WO 2005026611 A3 WO2005026611 A3 WO 2005026611A3 GB 2004003971 W GB2004003971 W GB 2004003971W WO 2005026611 A3 WO2005026611 A3 WO 2005026611A3
Authority
WO
Grant status
Application
Patent type
Prior art keywords
light
guide
backlit
increase
features
Prior art date
Application number
PCT/GB2004/003971
Other languages
French (fr)
Other versions
WO2005026611A2 (en )
Inventor
Owen Michael Gerard O'neill
Howell John Griffiths
Christopher John Ferrari
Michael John Hanney
Original Assignee
Ambisol Signage And Lighting L
Owen Michael Gerard O'neill
Howell John Griffiths
Christopher John Ferrari
Michael John Hanney
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

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means 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
    • G02B6/003Lens or lenticular sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/0035Means 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
    • G02B6/004Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/0001Light guides specially adapted for lighting devices or systems
    • G02B6/0011Light guides specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066Light guides 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
    • G02B6/0068Arrangements of plural sources, e.g. multi-colour light sources

Abstract

A light guide (30) for use with a backlit display (100), and a method of manufacturing the same is disclosed. The light guide (30) has an array of light control features (32) mechanically machined into its surface during manufacture to scatter light within the light guide (30) so that it passes out of the light guide (30) to illuminate the backlit display (100). Light is introduced to the light guide (30) from light boxes (50) containing light sources. Each light source is joined to a coupling element (52) to increase efficiency of light entry into the light guide (30) and to increase the amount of light directed toward the light control features (32).
PCT/GB2004/003971 2003-09-18 2004-09-17 Improvements in and relating to backlit displays WO2005026611A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0321836A GB0321836D0 (en) 2003-09-18 2003-09-18 Improvements in and relating to backlit displays
GB0321836.9 2003-09-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0607613A GB0607613D0 (en) 2003-09-18 2004-09-17 Improvements in and relating to backlit displays

Publications (2)

Publication Number Publication Date
WO2005026611A2 true WO2005026611A2 (en) 2005-03-24
WO2005026611A3 true true WO2005026611A3 (en) 2005-09-22

Family

ID=29227299

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/003971 WO2005026611A3 (en) 2003-09-18 2004-09-17 Improvements in and relating to backlit displays

Country Status (2)

Country Link
GB (2) GB0321836D0 (en)
WO (1) WO2005026611A3 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890201A (en) * 1987-01-15 1989-12-26 Generaldirektoratet For Danske Statsbaner, Dsb, And Jens Moller-Jensen Light transmitting plate member
WO2002075375A1 (en) * 2001-03-16 2002-09-26 Toray Industries, Inc. Optical functional sheet
US20030147259A1 (en) * 2002-02-02 2003-08-07 Opti-Flux Technologies Inc. Light emitting flat panel with embedded light guides yielding controlled light extraction for general lighting luminaire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890201A (en) * 1987-01-15 1989-12-26 Generaldirektoratet For Danske Statsbaner, Dsb, And Jens Moller-Jensen Light transmitting plate member
WO2002075375A1 (en) * 2001-03-16 2002-09-26 Toray Industries, Inc. Optical functional sheet
EP1369711A1 (en) * 2001-03-16 2003-12-10 Toray Industries, Inc. Optical functional sheet
US20030147259A1 (en) * 2002-02-02 2003-08-07 Opti-Flux Technologies Inc. Light emitting flat panel with embedded light guides yielding controlled light extraction for general lighting luminaire

Also Published As

Publication number Publication date Type
GB0607613D0 (en) 2006-05-31 grant
GB0321836D0 (en) 2003-10-15 grant
WO2005026611A2 (en) 2005-03-24 application
GB2423183A (en) 2006-08-16 application

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