WO2002008663A3 - Hollow surface illuminator - Google Patents

Hollow surface illuminator Download PDF

Info

Publication number
WO2002008663A3
WO2002008663A3 PCT/US2001/023022 US0123022W WO0208663A3 WO 2002008663 A3 WO2002008663 A3 WO 2002008663A3 US 0123022 W US0123022 W US 0123022W WO 0208663 A3 WO0208663 A3 WO 0208663A3
Authority
WO
WIPO (PCT)
Prior art keywords
light
prismatic
films
conducting
prismatic films
Prior art date
Application number
PCT/US2001/023022
Other languages
French (fr)
Other versions
WO2002008663A2 (en
Inventor
Kazuhiko Toyooka
Original Assignee
3M Innovative Properties Co
Kazuhiko Toyooka
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, Kazuhiko Toyooka filed Critical 3M Innovative Properties Co
Priority to KR10-2003-7001127A priority Critical patent/KR20030026325A/en
Priority to EP01961683A priority patent/EP1303725A2/en
Priority to AU2001282930A priority patent/AU2001282930A1/en
Priority to US10/333,391 priority patent/US6809892B2/en
Publication of WO2002008663A2 publication Critical patent/WO2002008663A2/en
Publication of WO2002008663A3 publication Critical patent/WO2002008663A3/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
    • 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
    • G02B6/0033—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
    • G02B6/0096—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the lights guides being of the hollow type

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

A light-conducting unit (6) which can effectively balance the light-leaking effect and the light-propagation effect of the prismatic films (1, 2) forming the light-conducting space (3), and satisfy the requirements to reduce the weight of the unit is disclosed. A light-conducting unit (6) comprising the first prismatic film (1) and the second prismatic film (2), each having two major surfaces, one of which is a prismatic surface, and the other of which is a flat surface, said prismatic surface carrying prisms arranged substantially parallel to each other, wherein said two prismatic films (1, 2) are arranged so that the first edges (11, 21) of said prismatic films (1, 2) are positioned to form an opening (30), a light-conducting space (3) is formed between said prismatic films (1, 2), and the height of said light-conducting space (3) does not substantially increase from said opening (30) to the remote edges (12, 22) of the prismatic films (1, 2) opposing said opening (30), and the major surface of said first prismatic film (1) which faces outside said light-conducting space (3) is a light-emitting surface, and the arrangement of the both prismatic films (1, 2) and the directions of the prisms of the both prismatic films (1, 2) in relation to the incident direction of light (40) are defined under the specific conditions.
PCT/US2001/023022 2000-07-26 2001-07-20 Hollow surface illuminator WO2002008663A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR10-2003-7001127A KR20030026325A (en) 2000-07-26 2001-07-20 Hollow surface illuminator
EP01961683A EP1303725A2 (en) 2000-07-26 2001-07-20 Hollow surface illuminator
AU2001282930A AU2001282930A1 (en) 2000-07-26 2001-07-20 Hollow surface illuminator
US10/333,391 US6809892B2 (en) 2000-07-26 2001-07-20 Hollow surface illuminator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000225276A JP4485026B2 (en) 2000-07-26 2000-07-26 Light guiding unit
JP2000-225276 2000-07-26

Publications (2)

Publication Number Publication Date
WO2002008663A2 WO2002008663A2 (en) 2002-01-31
WO2002008663A3 true WO2002008663A3 (en) 2002-05-30

Family

ID=18719076

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/023022 WO2002008663A2 (en) 2000-07-26 2001-07-20 Hollow surface illuminator

Country Status (7)

Country Link
EP (1) EP1303725A2 (en)
JP (1) JP4485026B2 (en)
KR (1) KR20030026325A (en)
CN (1) CN1211675C (en)
AU (1) AU2001282930A1 (en)
TW (1) TW512292B (en)
WO (1) WO2002008663A2 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1440346A1 (en) * 2001-11-02 2004-07-28 Honeywell International Inc. Hollow wedge shape light guide for back illumination
JP4273002B2 (en) * 2002-03-28 2009-06-03 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Compact lighting system and display device
US7303322B2 (en) 2003-12-23 2007-12-04 3M Innovative Properties Company Multiple lightguide backlight
US7223005B2 (en) 2003-12-23 2007-05-29 Lamb David J Hybrid lightguide backlight
US20060221610A1 (en) * 2005-04-01 2006-10-05 Chew Tong F Light-emitting apparatus having a plurality of overlapping panels forming recesses from which light is emitted
KR100781350B1 (en) 2005-12-26 2007-11-30 주식회사 바다테크 High Brightness Back Light Device
KR20070096457A (en) * 2006-03-24 2007-10-02 엘지전자 주식회사 Planar light source using a light pipe, back light unit and liquid crystal display having the same
CN101681057B (en) * 2007-05-20 2012-07-04 3M创新有限公司 Thin hollow backlights with beneficial design characteristics
WO2009105450A1 (en) * 2008-02-22 2009-08-27 3M Innovative Properties Company Backlights having selected output light flux distributions and display systems using same
JP2011134481A (en) * 2009-12-22 2011-07-07 Lecip Holdings Corp Lighting system
KR101037514B1 (en) * 2010-07-30 2011-05-26 변종익 A removal apparatus for textile dust
CN104597555B (en) * 2014-12-02 2019-01-15 深圳市华星光电技术有限公司 Light guide plate, backlight module and liquid crystal display device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292173A2 (en) * 1987-05-08 1988-11-23 Minnesota Mining And Manufacturing Company Apparatus for continuously controlled emission of light from prism light guide
JPH06180552A (en) * 1992-11-20 1994-06-28 Minnesota Mining & Mfg Co <3M> Light box
US5863114A (en) * 1993-03-09 1999-01-26 Fujitsu Limited Light emissive panel unit
JPH11142845A (en) * 1997-11-07 1999-05-28 Toshiba Corp Back light unit and liquid crystal display device having the unit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292173A2 (en) * 1987-05-08 1988-11-23 Minnesota Mining And Manufacturing Company Apparatus for continuously controlled emission of light from prism light guide
JPH06180552A (en) * 1992-11-20 1994-06-28 Minnesota Mining & Mfg Co <3M> Light box
US5863114A (en) * 1993-03-09 1999-01-26 Fujitsu Limited Light emissive panel unit
JPH11142845A (en) * 1997-11-07 1999-05-28 Toshiba Corp Back light unit and liquid crystal display device having the unit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 07 31 March 1998 (1998-03-31) *
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 10 31 August 1999 (1999-08-31) *

Also Published As

Publication number Publication date
AU2001282930A1 (en) 2002-02-05
CN1211675C (en) 2005-07-20
CN1444711A (en) 2003-09-24
KR20030026325A (en) 2003-03-31
JP4485026B2 (en) 2010-06-16
TW512292B (en) 2002-12-01
WO2002008663A2 (en) 2002-01-31
JP2002050220A (en) 2002-02-15
EP1303725A2 (en) 2003-04-23

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