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WO2009019989A1 - Backlight device, liquid crystal display device, optical member, and lenticular lens sheet - Google Patents

Backlight device, liquid crystal display device, optical member, and lenticular lens sheet Download PDF

Info

Publication number
WO2009019989A1
WO2009019989A1 PCT/JP2008/063309 JP2008063309W WO2009019989A1 WO 2009019989 A1 WO2009019989 A1 WO 2009019989A1 JP 2008063309 W JP2008063309 W JP 2008063309W WO 2009019989 A1 WO2009019989 A1 WO 2009019989A1
Authority
WO
WIPO (PCT)
Prior art keywords
lenticular lens
lens sheet
backlight device
cylindrical lenses
liquid crystal
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.)
Ceased
Application number
PCT/JP2008/063309
Other languages
French (fr)
Japanese (ja)
Inventor
Yukinori Yamada
Motoshi Uehara
Nobuyasu Ishihara
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.)
Maxell Ltd
Original Assignee
Hitachi Maxell 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
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Publication of WO2009019989A1 publication Critical patent/WO2009019989A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • G02F1/133604—Direct backlight with lamps
    • 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
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Landscapes

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

Abstract

A backlight device has an area light source, a lenticular lens sheet (31), and a diffusion sheet (32). The area light source has linear light sources arranged next to each other. The lenticular lens sheet (31) is installed over the area light source. The lenticular lens sheet (31) has cylindrical lenses arranged next to each other in the direction in which the linear light sources are arranged next to each other, and also has flat sections each formed between adjacent cylindrical lenses. The pitch Pc of the cylindrical lenses, the width Wf of a flat section, and the height Hc of a cylindrical lens satisfy the formula (1) and formula (2). The diffusion sheet (32) is installed over the cylindrical lenses and has a haze in the range of 70% to 80%. In the backlight device, uneven luminance is suppressed and the width of viewing angle dependence of luminance in the direction of a specific axis is maintained wide. 1/16 ≤ Wf/Pc < 1/6 (1) 5/16 ≤ Hc/Pc ≤ 1/2 (2)
PCT/JP2008/063309 2007-08-08 2008-07-24 Backlight device, liquid crystal display device, optical member, and lenticular lens sheet Ceased WO2009019989A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007206168A JP4163243B1 (en) 2007-08-08 2007-08-08 Backlight device, liquid crystal display device, optical member and lenticular lens sheet
JP2007-206168 2007-08-08

Publications (1)

Publication Number Publication Date
WO2009019989A1 true WO2009019989A1 (en) 2009-02-12

Family

ID=39916210

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/063309 Ceased WO2009019989A1 (en) 2007-08-08 2008-07-24 Backlight device, liquid crystal display device, optical member, and lenticular lens sheet

Country Status (3)

Country Link
JP (1) JP4163243B1 (en)
TW (1) TW200914947A (en)
WO (1) WO2009019989A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020129015A3 (en) * 2018-12-20 2020-09-03 3M Innovative Properties Company Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5822103B2 (en) * 2009-10-22 2015-11-24 東洋紡株式会社 Viewing angle improving film for liquid crystal display device, protective film with viewing angle improving function, and liquid crystal display device
US8736792B2 (en) * 2009-10-22 2014-05-27 Toyo Boseki Kabushiki Kaisha Viewing-angle-enhancing film for liquid crystal display device, protective film with viewing-angle-enhancing-function, and liquid crystal display device
JP2012220662A (en) * 2011-04-07 2012-11-12 Toyobo Co Ltd Film for improving viewing angle and liquid crystal display device
JP2012226158A (en) * 2011-04-20 2012-11-15 Toyobo Co Ltd Film for improving viewing angle, film laminate for improving viewing angle, and liquid crystal display device
CN103578367A (en) * 2013-11-13 2014-02-12 广东威创视讯科技股份有限公司 LED display device

Citations (4)

* 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, liquid crystal display device
JP2004006256A (en) * 2002-03-26 2004-01-08 Sharp Corp Backlight and liquid crystal display
JP2006164719A (en) * 2004-12-07 2006-06-22 Sumitomo Rubber Ind Ltd Direct backlight
JP2007012517A (en) * 2005-07-01 2007-01-18 Dainippon Printing Co Ltd Surface light source device

Patent Citations (4)

* 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, liquid crystal display device
JP2004006256A (en) * 2002-03-26 2004-01-08 Sharp Corp Backlight and liquid crystal display
JP2006164719A (en) * 2004-12-07 2006-06-22 Sumitomo Rubber Ind Ltd Direct backlight
JP2007012517A (en) * 2005-07-01 2007-01-18 Dainippon Printing Co Ltd Surface light source device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020129015A3 (en) * 2018-12-20 2020-09-03 3M Innovative Properties Company Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane
CN113196113A (en) * 2018-12-20 2021-07-30 3M创新有限公司 Light control film with turning film and lenticular diffuser for enhancing view in a horizontal plane
US12189150B2 (en) 2018-12-20 2025-01-07 3M Innovative Properties Company Light control film with turning film and lenticular diffuser for view enhancement in the horizontal plane

Also Published As

Publication number Publication date
JP2009043506A (en) 2009-02-26
JP4163243B1 (en) 2008-10-08
TW200914947A (en) 2009-04-01

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