CA2297813A1 - Uniform light extraction from light guide, independently of light guide length - Google Patents

Uniform light extraction from light guide, independently of light guide length Download PDF

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Publication number
CA2297813A1
CA2297813A1 CA002297813A CA2297813A CA2297813A1 CA 2297813 A1 CA2297813 A1 CA 2297813A1 CA 002297813 A CA002297813 A CA 002297813A CA 2297813 A CA2297813 A CA 2297813A CA 2297813 A1 CA2297813 A1 CA 2297813A1
Authority
CA
Canada
Prior art keywords
light guide
light
independently
length
extraction mechanism
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.)
Granted
Application number
CA002297813A
Other languages
French (fr)
Other versions
CA2297813C (en
Inventor
Lorne A. Whitehead
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.)
University of British Columbia
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2297813A1 publication Critical patent/CA2297813A1/en
Application granted granted Critical
Publication of CA2297813C publication Critical patent/CA2297813C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B6/0005—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 of the fibre type
    • G02B6/001—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 of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre

Abstract

A light guide light extraction mechanism can be formed in a predetermined maximum length to yield a predetermined light emission characteristic. Any shorter length segment removed from a predetermined end of the extraction mechanism and installed in a light guide of that shorter length causes the shorter length light guide to exhibit substantially uniform surface brightness. This obviates the need for cumbersome trial and error development of a different light extraction mechanism for each such shorter light guide.
CA002297813A 1997-09-04 1998-03-13 Uniform light extraction from light guide, independently of light guide length Expired - Lifetime CA2297813C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/923,335 US5901266A (en) 1997-09-04 1997-09-04 Uniform light extraction from light guide, independently of light guide length
US08/923,335 1997-09-04
PCT/CA1998/000234 WO1999011971A1 (en) 1997-09-04 1998-03-13 Uniform light extraction from light guide, independently of light guide length

Publications (2)

Publication Number Publication Date
CA2297813A1 true CA2297813A1 (en) 1999-03-11
CA2297813C CA2297813C (en) 2004-02-17

Family

ID=25448520

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002297813A Expired - Lifetime CA2297813C (en) 1997-09-04 1998-03-13 Uniform light extraction from light guide, independently of light guide length

Country Status (8)

Country Link
US (1) US5901266A (en)
EP (1) EP1009948B1 (en)
JP (2) JP3557397B2 (en)
CN (1) CN1102243C (en)
AU (1) AU6491498A (en)
CA (1) CA2297813C (en)
DE (1) DE69803301T2 (en)
WO (1) WO1999011971A1 (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6285814B1 (en) 1999-09-30 2001-09-04 3M Innovative Properties Company Light guide luminaire
US6481882B1 (en) 2000-05-04 2002-11-19 3M Innovative Properties Company Light pipe fixture with internal extractor
US6568822B2 (en) 2001-04-06 2003-05-27 3M Innovative Properties Company Linear illumination source
US7064740B2 (en) * 2001-11-09 2006-06-20 Sharp Laboratories Of America, Inc. Backlit display with improved dynamic range
NL1020377C2 (en) 2002-04-12 2003-10-14 Antron B V Light pipe, has multiple light sources connected to power cable extending through light casing
US7128457B2 (en) * 2002-05-23 2006-10-31 3M Innovative Properties Company Surface light-emitting device
KR100875326B1 (en) * 2003-12-18 2008-12-22 샤프 가부시키가이샤 Liquid crystal display response characteristics determination method and presentation method
US7777714B2 (en) * 2004-05-04 2010-08-17 Sharp Laboratories Of America, Inc. Liquid crystal display with adaptive width
US7872631B2 (en) * 2004-05-04 2011-01-18 Sharp Laboratories Of America, Inc. Liquid crystal display with temporal black point
US7505018B2 (en) * 2004-05-04 2009-03-17 Sharp Laboratories Of America, Inc. Liquid crystal display with reduced black level insertion
US7602369B2 (en) * 2004-05-04 2009-10-13 Sharp Laboratories Of America, Inc. Liquid crystal display with colored backlight
US8395577B2 (en) 2004-05-04 2013-03-12 Sharp Laboratories Of America, Inc. Liquid crystal display with illumination control
US7023451B2 (en) * 2004-06-14 2006-04-04 Sharp Laboratories Of America, Inc. System for reducing crosstalk
US7556836B2 (en) * 2004-09-03 2009-07-07 Solae, Llc High protein snack product
US7898519B2 (en) * 2005-02-17 2011-03-01 Sharp Laboratories Of America, Inc. Method for overdriving a backlit display
US8050512B2 (en) 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US7525528B2 (en) * 2004-11-16 2009-04-28 Sharp Laboratories Of America, Inc. Technique that preserves specular highlights
US8050511B2 (en) * 2004-11-16 2011-11-01 Sharp Laboratories Of America, Inc. High dynamic range images from low dynamic range images
US9143657B2 (en) 2006-01-24 2015-09-22 Sharp Laboratories Of America, Inc. Color enhancement technique using skin color detection
US8121401B2 (en) 2006-01-24 2012-02-21 Sharp Labortories of America, Inc. Method for reducing enhancement of artifacts and noise in image color enhancement
JP2009537870A (en) * 2006-05-18 2009-10-29 スリーエム イノベイティブ プロパティズ カンパニー Method for manufacturing light guide with extraction structure and light guide manufactured by the method
US7592996B2 (en) * 2006-06-02 2009-09-22 Samsung Electronics Co., Ltd. Multiprimary color display with dynamic gamut mapping
US8941580B2 (en) * 2006-11-30 2015-01-27 Sharp Laboratories Of America, Inc. Liquid crystal display with area adaptive backlight
JP2009211858A (en) * 2008-03-03 2009-09-17 Fujikura Ltd Method of introducing light into light-emitting light guide
US8317352B2 (en) 2008-12-11 2012-11-27 Robert Saccomanno Non-invasive injection of light into a transparent substrate, such as a window pane through its face
DE102013206628A1 (en) * 2013-04-15 2014-10-16 Bayerische Motoren Werke Aktiengesellschaft Automotive interior lighting
CN103913798B (en) * 2014-03-28 2015-11-25 京东方科技集团股份有限公司 Light guide plate, backlight module, display device and method for manufacturing light guide plate
JP2020060658A (en) * 2018-10-09 2020-04-16 株式会社フジクラ Optical device and laser device

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4615579A (en) * 1983-08-29 1986-10-07 Canadian Patents & Development Ltd. Prism light guide luminaire
US4750798A (en) * 1983-08-29 1988-06-14 Canadian Patents And Developement Limited Prism light guide luminaire
DE3600635A1 (en) * 1986-01-11 1987-07-16 Hund Helmut Gmbh Illuminating device for homogeneous illumination of a medium in a container, in particular in a reactor
US4850665A (en) * 1987-02-20 1989-07-25 Minnesota Mining And Manufacturing Company Method and apparatus for controlled emission of light from prism light guide
US4787708A (en) * 1987-05-08 1988-11-29 Tir Systems Ltd. Apparatus for continuously controlled emission of light from prism light guide
US4937716A (en) * 1988-05-05 1990-06-26 Tir Systems Ltd Illuminating device having non-absorptive variable transmissivity cover
TW197499B (en) * 1990-07-03 1993-01-01 Meitaku Syst Kk
US5243506A (en) * 1991-06-17 1993-09-07 Tir Systems Ltd. High aspect ratio light emitter having high uniformity and directionality
US5186530A (en) * 1991-11-22 1993-02-16 Tir Systems, Ltd. Lighting structure having variable transmissivity internal light guide illumination
FR2714147B1 (en) * 1993-12-17 1996-02-09 Andre Bernasson Fiber optic with side lighting.
US5481637A (en) * 1994-11-02 1996-01-02 The University Of British Columbia Hollow light guide for diffuse light
US5661839A (en) * 1996-03-22 1997-08-26 The University Of British Columbia Light guide employing multilayer optical film

Also Published As

Publication number Publication date
DE69803301D1 (en) 2002-02-21
JP2004158460A (en) 2004-06-03
CN1102243C (en) 2003-02-26
JP2001515221A (en) 2001-09-18
US5901266A (en) 1999-05-04
CA2297813C (en) 2004-02-17
EP1009948B1 (en) 2001-11-21
AU6491498A (en) 1999-03-22
WO1999011971A1 (en) 1999-03-11
JP3557397B2 (en) 2004-08-25
CN1269876A (en) 2000-10-11
EP1009948A1 (en) 2000-06-21
DE69803301T2 (en) 2002-07-25

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Effective date: 20180313