WO2008078510A1 - Light diffusing base material and planar light source using the same - Google Patents

Light diffusing base material and planar light source using the same Download PDF

Info

Publication number
WO2008078510A1
WO2008078510A1 PCT/JP2007/073317 JP2007073317W WO2008078510A1 WO 2008078510 A1 WO2008078510 A1 WO 2008078510A1 JP 2007073317 W JP2007073317 W JP 2007073317W WO 2008078510 A1 WO2008078510 A1 WO 2008078510A1
Authority
WO
WIPO (PCT)
Prior art keywords
base material
light source
same
light diffusing
planar light
Prior art date
Application number
PCT/JP2007/073317
Other languages
French (fr)
Japanese (ja)
Inventor
Daisuke Ogata
Akikazu Kikuchi
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 JP2008513424A priority Critical patent/JPWO2008078510A1/en
Publication of WO2008078510A1 publication Critical patent/WO2008078510A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • G02B5/0215—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 a regular 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
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • 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
    • 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)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

Provided are a light diffusing base material, which efficiently eliminates luminance nonuniformity and has both high illuminance uniformity ratio and high luminance characteristics on a screen, and a planar light source which uses such base material and can be a direct backlight having high luminance and high illuminance uniformity ratio. The base material has an uneven shape wherein a top portion and a bottom portion are repeated, on at least one surface. The base material is composed of a material having a refraction index within a range of 1.45-1.65. When the direction wherein the top portion and the bottom portion are repeated is expressed as x, and the direction of the thickness of the base material as z, an angle ϑ of the uneven shape on an x-z plane is 55-85° or 95-125° at the bottom, and the inclination of a tangent line between the adjacent bottom portions is reduced in a direction where x increases.
PCT/JP2007/073317 2006-12-22 2007-12-03 Light diffusing base material and planar light source using the same WO2008078510A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008513424A JPWO2008078510A1 (en) 2006-12-22 2007-12-03 Light diffusing substrate and surface light source using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-345970 2006-12-22
JP2006345970 2006-12-22

Publications (1)

Publication Number Publication Date
WO2008078510A1 true WO2008078510A1 (en) 2008-07-03

Family

ID=39562304

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/073317 WO2008078510A1 (en) 2006-12-22 2007-12-03 Light diffusing base material and planar light source using the same

Country Status (5)

Country Link
JP (1) JPWO2008078510A1 (en)
KR (1) KR20090101153A (en)
CN (1) CN101523243A (en)
TW (1) TW200835941A (en)
WO (1) WO2008078510A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101968203A (en) * 2009-07-27 2011-02-09 住友化学株式会社 Light control plate, surface light source device and transmissive image display device
JP2011171105A (en) * 2010-02-18 2011-09-01 Dainippon Printing Co Ltd Planar light source device and display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5277414B2 (en) * 2008-12-26 2013-08-28 株式会社Ｓｕｍｃｏ Detection device and detection method for colored foreign substances contained in quartz powder raw material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10246805A (en) * 1997-03-06 1998-09-14 Dainippon Printing Co Ltd Optical sheet for diffused light control, back light device, and liquid crystal display device
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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11142622A (en) * 1997-11-13 1999-05-28 Dainippon Printing Co Ltd Lens film, surface light source device and liquid crystal display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10246805A (en) * 1997-03-06 1998-09-14 Dainippon Printing Co Ltd Optical sheet for diffused light control, back light device, and liquid crystal display device
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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101968203A (en) * 2009-07-27 2011-02-09 住友化学株式会社 Light control plate, surface light source device and transmissive image display device
JP2011028033A (en) * 2009-07-27 2011-02-10 Sumitomo Chemical Co Ltd Optical control plate, surface light source device, and transmissive image display device
CN101968203B (en) * 2009-07-27 2014-07-16 住友化学株式会社 Light control plate, surface light source device and transmissive image display device
JP2011171105A (en) * 2010-02-18 2011-09-01 Dainippon Printing Co Ltd Planar light source device and display device

Also Published As

Publication number Publication date
TW200835941A (en) 2008-09-01
KR20090101153A (en) 2009-09-24
CN101523243A (en) 2009-09-02
JPWO2008078510A1 (en) 2010-04-22

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