WO2009057696A1 - Optical sheet and backlight unit using same - Google Patents

Optical sheet and backlight unit using same Download PDF

Info

Publication number
WO2009057696A1
WO2009057696A1 PCT/JP2008/069759 JP2008069759W WO2009057696A1 WO 2009057696 A1 WO2009057696 A1 WO 2009057696A1 JP 2008069759 W JP2008069759 W JP 2008069759W WO 2009057696 A1 WO2009057696 A1 WO 2009057696A1
Authority
WO
WIPO (PCT)
Prior art keywords
fresnel lens
lens surfaces
optical sheet
planoconvex
backlight unit
Prior art date
Application number
PCT/JP2008/069759
Other languages
French (fr)
Japanese (ja)
Inventor
Yoichiro Makimura
Eiichi Shirota
Original Assignee
Takiron Co., Ltd.
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
Priority claimed from JP2007282616A external-priority patent/JP2009109780A/en
Priority claimed from JP2007308808A external-priority patent/JP2009133977A/en
Application filed by Takiron Co., Ltd. filed Critical Takiron Co., Ltd.
Publication of WO2009057696A1 publication Critical patent/WO2009057696A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Lenses (AREA)

Abstract

An optical sheet having Fresnel lens surfaces (1a) like a planoconvex Fresnel lens, wherein the Fresnel lens surfaces (1a) are grouped into regions (R), the Fresnel lens surfaces (1a) in each region are inclined, and the light passing through the Fresnel lens surfaces (1a) in each region (R) can have a spread to a some extent. A backlight unit using the optical sheet is also provided. An optical sheet (1) like a planoconvex linear Fresnel lens has Fresnel lens surfaces (1a) divided like a planoconvex linear Fresnel lens and grouped into regions (R) each including consecutive Fresnel lens surfaces (1a). The Fresnel lens surfaces (1a) at adjacent ends of adjacent regions (R) each composed of a curved surface corresponding to the original shape like a planoconvex linear Fresnel lens or a surface approximated to the curved surface are inclined in opposite directions. The Fresnel lens surfaces (1a) in each region (R) are inclined at angles increasing toward the ends.
PCT/JP2008/069759 2007-10-31 2008-10-30 Optical sheet and backlight unit using same WO2009057696A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007282616A JP2009109780A (en) 2007-10-31 2007-10-31 Optical sheet and backlight unit using the same
JP2007-282616 2007-10-31
JP2007-308808 2007-11-29
JP2007308808A JP2009133977A (en) 2007-11-29 2007-11-29 Optical sheet and back light unit using same

Publications (1)

Publication Number Publication Date
WO2009057696A1 true WO2009057696A1 (en) 2009-05-07

Family

ID=40591080

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/069759 WO2009057696A1 (en) 2007-10-31 2008-10-30 Optical sheet and backlight unit using same

Country Status (1)

Country Link
WO (1) WO2009057696A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276444A (en) * 2014-06-25 2016-01-27 乐金显示有限公司 Curved surface backlight unit and curved surface display device including the same
CN115210629A (en) * 2020-03-13 2022-10-18 株式会社电装 Virtual image display device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000275741A (en) * 1999-03-24 2000-10-06 Mitsubishi Rayon Co Ltd Transmission type screen
JP2001079854A (en) * 1999-07-15 2001-03-27 Matsushita Electric Works Ltd Mold for optical panel and its production
JP2002534705A (en) * 1998-12-31 2002-10-15 マイクロシャープ コーポレイション リミテッド Diffuser with stepped surface
JP2002352611A (en) * 2001-05-24 2002-12-06 Sharp Corp Lighting system and display device equipped with it
JP2005077767A (en) * 2003-09-01 2005-03-24 Hitachi Ltd Video display device, transmission type screen and fresnel lens sheet used for same, and manufacturing method therefor
JP2005173505A (en) * 2003-12-15 2005-06-30 Seiko Epson Corp Method for manufacturing lens base plate with straight advance light control part, lens base plate with straight advance light control part, transmission type screen and rear type projector
JP2006351519A (en) * 2005-05-20 2006-12-28 Sumitomo Chemical Co Ltd Plane light source device and transmission image display device
JP2007011208A (en) * 2005-07-04 2007-01-18 Dainippon Printing Co Ltd Fresnel substrate sheet, fresnel lens sheet, transmission-type screen, rear projection type display device
JP2007010776A (en) * 2005-06-28 2007-01-18 Mitsubishi Electric Corp Prism sheet, projector screen, and multi-screen display device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002534705A (en) * 1998-12-31 2002-10-15 マイクロシャープ コーポレイション リミテッド Diffuser with stepped surface
JP2000275741A (en) * 1999-03-24 2000-10-06 Mitsubishi Rayon Co Ltd Transmission type screen
JP2001079854A (en) * 1999-07-15 2001-03-27 Matsushita Electric Works Ltd Mold for optical panel and its production
JP2002352611A (en) * 2001-05-24 2002-12-06 Sharp Corp Lighting system and display device equipped with it
JP2005077767A (en) * 2003-09-01 2005-03-24 Hitachi Ltd Video display device, transmission type screen and fresnel lens sheet used for same, and manufacturing method therefor
JP2005173505A (en) * 2003-12-15 2005-06-30 Seiko Epson Corp Method for manufacturing lens base plate with straight advance light control part, lens base plate with straight advance light control part, transmission type screen and rear type projector
JP2006351519A (en) * 2005-05-20 2006-12-28 Sumitomo Chemical Co Ltd Plane light source device and transmission image display device
JP2007010776A (en) * 2005-06-28 2007-01-18 Mitsubishi Electric Corp Prism sheet, projector screen, and multi-screen display device
JP2007011208A (en) * 2005-07-04 2007-01-18 Dainippon Printing Co Ltd Fresnel substrate sheet, fresnel lens sheet, transmission-type screen, rear projection type display device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105276444A (en) * 2014-06-25 2016-01-27 乐金显示有限公司 Curved surface backlight unit and curved surface display device including the same
CN105276444B (en) * 2014-06-25 2017-12-08 乐金显示有限公司 Curved surface back light unit and the curved-surface display device for including the curved surface back light unit
CN115210629A (en) * 2020-03-13 2022-10-18 株式会社电装 Virtual image display device
CN115210629B (en) * 2020-03-13 2023-12-05 株式会社电装 virtual image display device

Similar Documents

Publication Publication Date Title
TW200624943A (en) Backlight module and illumination device thereof
TW200636347A (en) Light-emitting apparatus having a plurality of adjacent, overlapping light-guide plates
WO2007117608A3 (en) Lighting unit reflector of reflective surfaces with different curvatures
ATE499628T1 (en) TRANSPARENT AND POLARIZING GOGGLES LENS WITH A ZONE ASSOCIATED WITH AN OBLIQUE ORIENTED POLARIZATION FILTER
CY1109203T1 (en) INFLAMMATORY LENS AND ITS EQUIPMENT
TW200707025A (en) Backlight and liquid crystal display using the same
TWI366806B (en) Surface light source using led and backlight unit having the surface light source
WO2014001484A1 (en) Lens for led illumination
WO2009055766A3 (en) Variable spot size lenses and lighting systems
EP1174659A4 (en) Illuminator and liquid crystal display comprising the illuminator
WO2007016363A3 (en) Free-form lenticular optical elements and their application to condensers and headlamps
EP2284577A3 (en) Optical construction component and lighting device
TW200734734A (en) Polarizing turning film
TW200720774A (en) Brightness enhancement film and backlight module
WO2007057734A3 (en) Photochromatic pinhole contact lenses
WO2009054446A1 (en) Diffusion sheet
MX2009007461A (en) Secondary optic lens.
DE602006021806D1 (en) LIGHTING EQUIPMENT
TW200707016A (en) Backlight unit
WO2009057696A1 (en) Optical sheet and backlight unit using same
TW200722785A (en) Single focus lens
TW200515055A (en) Light guiding device and backlight module using the same
WO2009034737A1 (en) Optical member, display illuminating device, display and television receiver
TW200745718A (en) Optic projection device
TW200717062A (en) Optical pick-up system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08845458

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08845458

Country of ref document: EP

Kind code of ref document: A1