WO2008090821A1 - Diffusion sheet and back lighting unit using same - Google Patents

Diffusion sheet and back lighting unit using same Download PDF

Info

Publication number
WO2008090821A1
WO2008090821A1 PCT/JP2008/050624 JP2008050624W WO2008090821A1 WO 2008090821 A1 WO2008090821 A1 WO 2008090821A1 JP 2008050624 W JP2008050624 W JP 2008050624W WO 2008090821 A1 WO2008090821 A1 WO 2008090821A1
Authority
WO
WIPO (PCT)
Prior art keywords
strength
sheet
diffusion sheet
lighting unit
back lighting
Prior art date
Application number
PCT/JP2008/050624
Other languages
French (fr)
Japanese (ja)
Inventor
Hiromitsu Takahashi
Mizuki Yamamoto
Kozo Takahashi
Original Assignee
Toray Industries, Inc.
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 Toray Industries, Inc. filed Critical Toray Industries, Inc.
Priority to KR1020137034207A priority Critical patent/KR101450020B1/en
Priority to JP2008523058A priority patent/JP5470846B2/en
Publication of WO2008090821A1 publication Critical patent/WO2008090821A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
    • G02B5/0226—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures having particles on the surface
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention is related to a diffusion sheet which has a plurality of convex portions with long and short axes formed on one surface of the sheet, wherein the longitudinal directions of the convex portions are substantially aligned in one direction, and in which, if light rays are incident on the other surface at an incident angle of 0°, the light rays projecting from the one surface of the sheet is satisfied with the following two conditions (1) and (2): (1) With respect to the projection strength distribution [1] in the plane perpendicular to the longitudinal direction of the convex portion, the projecting angle with the strength equal to 50% of the strength at the incident angle of 0° is in the range of 15-25°. (2) With respect to the projection strength distribution [1] in the plane perpendicular to the sheet surface and parallel with the longitudinal direction of the convex portion, the projecting angle with the strength equal to 50% of the strength at the incident angle of 0° is in the range of 0.5-5°. According to the invention, a diffusion sheet with an excellent anisotropic diffusion effect of light and a back lighting unit with superior brightness and uniformity are provided.
PCT/JP2008/050624 2007-01-24 2008-01-18 Diffusion sheet and back lighting unit using same WO2008090821A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020137034207A KR101450020B1 (en) 2007-01-24 2008-01-18 Diffusion sheet and back lighting unit using same
JP2008523058A JP5470846B2 (en) 2007-01-24 2008-01-18 Diffusion sheet and backlight unit using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007013503 2007-01-24
JP2007-013503 2007-01-24

Publications (1)

Publication Number Publication Date
WO2008090821A1 true WO2008090821A1 (en) 2008-07-31

Family

ID=39644398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/050624 WO2008090821A1 (en) 2007-01-24 2008-01-18 Diffusion sheet and back lighting unit using same

Country Status (4)

Country Link
JP (2) JP5470846B2 (en)
KR (2) KR101392288B1 (en)
TW (1) TWI432793B (en)
WO (1) WO2008090821A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010016557A1 (en) * 2008-08-07 2010-02-11 東洋紡績株式会社 Anisotropic light-diffusing film, anisotropic light-diffusing laminate, anisotropic light-reflecting laminate, and uses thereof
JP2010079292A (en) * 2008-08-27 2010-04-08 Toppan Printing Co Ltd Mold for manufacturing optical component, manufacturing method of optical component, optical component, and liquid crystal display unit
JP2010078774A (en) * 2008-09-25 2010-04-08 Gamma Optical Co Ltd Optical film piece and backlight module using the optical film piece
JP2010123542A (en) * 2008-11-21 2010-06-03 Toshiba Lighting & Technology Corp Liquid agent for coating diffusion film of high-pressure discharge lamp and high-pressure discharge lamp
JP2010139754A (en) * 2008-12-11 2010-06-24 Toppan Printing Co Ltd Light diffusion device, back light unit, and display device
JP2012042820A (en) * 2010-08-20 2012-03-01 Oji Paper Co Ltd Anisotropic surface light-emitting unit and liquid crystal display device
JP2012173688A (en) * 2011-02-24 2012-09-10 Asahi Kasei Corp Light diffusion body and manufacturing method thereof, and stereoscopic video system
JP2012524300A (en) * 2009-04-15 2012-10-11 スリーエム イノベイティブ プロパティズ カンパニー Optical film for preventing optical coupling
JP2014160187A (en) * 2013-02-20 2014-09-04 Suntechopt Co Ltd Self-healing type high luminance prism sheet and surface light source unit
US9291752B2 (en) 2013-08-19 2016-03-22 3M Innovative Properties Company Retroreflecting optical construction
JP2017059472A (en) * 2015-09-18 2017-03-23 ミネベアミツミ株式会社 Lighting device
JP2017223937A (en) * 2016-06-14 2017-12-21 恵和株式会社 Prism sheet for backlight unit and backlight unit for liquid crystal display device

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075463A (en) * 1993-06-16 1995-01-10 Dainippon Printing Co Ltd Surface light source and display device using the same
JP2000280267A (en) * 1999-03-30 2000-10-10 Fuji Photo Film Co Ltd Production of light diffusing body
JP2001159704A (en) * 1999-09-21 2001-06-12 Daicel Chem Ind Ltd Anisotropic light scattering film
JP2002107510A (en) * 2000-09-27 2002-04-10 Keiwa Inc Anistropic diffusion sheet and backlight unit using the same
JP2005148095A (en) * 2003-11-11 2005-06-09 Toppan Printing Co Ltd Optical sheet, and backlight unit and display using optical sheet using the same
JP2006058780A (en) * 2004-08-23 2006-03-02 Nippon Hoso Kyokai <Nhk> Optical element and display device
JP2006078743A (en) * 2004-09-09 2006-03-23 Toray Ind Inc Diffusion film
JP2006251395A (en) * 2005-03-10 2006-09-21 Daicel Chem Ind Ltd Anisotropic scattering sheet
WO2006101011A1 (en) * 2005-03-18 2006-09-28 Hitachi Chemical Co., Ltd. Light guide plate and backlight device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4638752B2 (en) * 2004-04-12 2011-02-23 株式会社クラレ Light diffusion plate
JP2005316095A (en) * 2004-04-28 2005-11-10 Toray Ind Inc Anisotropic diffusion film
JP4584133B2 (en) * 2004-11-30 2010-11-17 株式会社クラレ LIGHTING DEVICE AND DISPLAY DEVICE USING THE SAME
JP2006284697A (en) 2005-03-31 2006-10-19 Toppan Printing Co Ltd Back light unit applied to liquid crystal display device
JP4604823B2 (en) 2005-05-10 2011-01-05 ソニー株式会社 Surface illumination device and liquid crystal display device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH075463A (en) * 1993-06-16 1995-01-10 Dainippon Printing Co Ltd Surface light source and display device using the same
JP2000280267A (en) * 1999-03-30 2000-10-10 Fuji Photo Film Co Ltd Production of light diffusing body
JP2001159704A (en) * 1999-09-21 2001-06-12 Daicel Chem Ind Ltd Anisotropic light scattering film
JP2002107510A (en) * 2000-09-27 2002-04-10 Keiwa Inc Anistropic diffusion sheet and backlight unit using the same
JP2005148095A (en) * 2003-11-11 2005-06-09 Toppan Printing Co Ltd Optical sheet, and backlight unit and display using optical sheet using the same
JP2006058780A (en) * 2004-08-23 2006-03-02 Nippon Hoso Kyokai <Nhk> Optical element and display device
JP2006078743A (en) * 2004-09-09 2006-03-23 Toray Ind Inc Diffusion film
JP2006251395A (en) * 2005-03-10 2006-09-21 Daicel Chem Ind Ltd Anisotropic scattering sheet
WO2006101011A1 (en) * 2005-03-18 2006-09-28 Hitachi Chemical Co., Ltd. Light guide plate and backlight device

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010016557A1 (en) * 2008-08-07 2010-02-11 東洋紡績株式会社 Anisotropic light-diffusing film, anisotropic light-diffusing laminate, anisotropic light-reflecting laminate, and uses thereof
US8979330B2 (en) 2008-08-07 2015-03-17 Toyo Boseki Kabushiki Kaisha Anisotropic light-diffusing film, anisotropic light-diffusing laminate, anisotropic light-reflecting laminate, and use thereof
JP2010079292A (en) * 2008-08-27 2010-04-08 Toppan Printing Co Ltd Mold for manufacturing optical component, manufacturing method of optical component, optical component, and liquid crystal display unit
JP2010078774A (en) * 2008-09-25 2010-04-08 Gamma Optical Co Ltd Optical film piece and backlight module using the optical film piece
JP2010123542A (en) * 2008-11-21 2010-06-03 Toshiba Lighting & Technology Corp Liquid agent for coating diffusion film of high-pressure discharge lamp and high-pressure discharge lamp
JP2010139754A (en) * 2008-12-11 2010-06-24 Toppan Printing Co Ltd Light diffusion device, back light unit, and display device
US8964146B2 (en) 2009-04-15 2015-02-24 3M Innovative Properties Company Optical film for preventing optical coupling
JP2012524300A (en) * 2009-04-15 2012-10-11 スリーエム イノベイティブ プロパティズ カンパニー Optical film for preventing optical coupling
US9551816B2 (en) 2009-04-15 2017-01-24 3M Innovative Properties Company Retroreflecting optical construction
JP2012042820A (en) * 2010-08-20 2012-03-01 Oji Paper Co Ltd Anisotropic surface light-emitting unit and liquid crystal display device
JP2012173688A (en) * 2011-02-24 2012-09-10 Asahi Kasei Corp Light diffusion body and manufacturing method thereof, and stereoscopic video system
JP2014160187A (en) * 2013-02-20 2014-09-04 Suntechopt Co Ltd Self-healing type high luminance prism sheet and surface light source unit
US9291752B2 (en) 2013-08-19 2016-03-22 3M Innovative Properties Company Retroreflecting optical construction
JP2017059472A (en) * 2015-09-18 2017-03-23 ミネベアミツミ株式会社 Lighting device
JP2017223937A (en) * 2016-06-14 2017-12-21 恵和株式会社 Prism sheet for backlight unit and backlight unit for liquid crystal display device

Also Published As

Publication number Publication date
JP5470846B2 (en) 2014-04-16
KR101392288B1 (en) 2014-05-07
KR101450020B1 (en) 2014-10-15
JP2014013393A (en) 2014-01-23
TW200839305A (en) 2008-10-01
TWI432793B (en) 2014-04-01
JPWO2008090821A1 (en) 2010-05-20
KR20090114354A (en) 2009-11-03
KR20140010463A (en) 2014-01-24

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