WO2005017581A3 - Backlight device - Google Patents

Backlight device Download PDF

Info

Publication number
WO2005017581A3
WO2005017581A3 PCT/IB2004/051456 IB2004051456W WO2005017581A3 WO 2005017581 A3 WO2005017581 A3 WO 2005017581A3 IB 2004051456 W IB2004051456 W IB 2004051456W WO 2005017581 A3 WO2005017581 A3 WO 2005017581A3
Authority
WO
WIPO (PCT)
Prior art keywords
vertical direction
relatively
slope
inclined surface
angle
Prior art date
Application number
PCT/IB2004/051456
Other languages
French (fr)
Other versions
WO2005017581A2 (en
Inventor
Akimitsu Tsuda
Original Assignee
Koninkl Philips Electronics Nv
Akimitsu Tsuda
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 Koninkl Philips Electronics Nv, Akimitsu Tsuda filed Critical Koninkl Philips Electronics Nv
Priority to JP2006523108A priority Critical patent/JP2007503007A/en
Priority to US10/567,170 priority patent/US20060250818A1/en
Priority to EP04769808A priority patent/EP1664867A2/en
Publication of WO2005017581A2 publication Critical patent/WO2005017581A2/en
Publication of WO2005017581A3 publication Critical patent/WO2005017581A3/en

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
    • 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
    • G02B6/0011—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
    • G02B6/0051—Diffusing sheet or layer

Abstract

An asymmetric prism sheet 15 has a plurality of projections 17 having prism shape on its surface. The projection 17 comprises a first inclined surface 17a having a relatively gentle slope (easy slope) and a second inclined surface 17b having a relatively steep slope (steep slope). A base angle 17d on the side of the second surface 17b is α ° and a base angle 17c on the side of the first surface 17a is β ° . In the case that the light enters into the asymmetric prism sheet 15, which has the above-mentioned structure, from the bottom surface 15a (light guide plate 11), the light is mainly emitted in the substantially vertical direction (a direction inclined by relatively small angle to the vertical direction) in the first inclined surface 17a (arrows X), and is mainly emitted in the inclined direction (a direction inclined by relatively large angle to the vertical direction) in the second inclined surface 17b (arrows Y).
PCT/IB2004/051456 2003-08-15 2004-08-13 Backlight device WO2005017581A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2006523108A JP2007503007A (en) 2003-08-15 2004-08-13 Backlight device
US10/567,170 US20060250818A1 (en) 2004-08-13 2004-08-13 Backlight device
EP04769808A EP1664867A2 (en) 2003-08-15 2004-08-13 Backlight device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IBPCT/IB03/03682 2003-08-15
IB0303682 2003-08-15

Publications (2)

Publication Number Publication Date
WO2005017581A2 WO2005017581A2 (en) 2005-02-24
WO2005017581A3 true WO2005017581A3 (en) 2005-05-19

Family

ID=34179252

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/051456 WO2005017581A2 (en) 2003-08-15 2004-08-13 Backlight device

Country Status (6)

Country Link
EP (1) EP1664867A2 (en)
JP (1) JP2007503007A (en)
KR (1) KR20060066092A (en)
CN (1) CN100414327C (en)
TW (1) TW200528854A (en)
WO (1) WO2005017581A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101275963B1 (en) 2007-10-24 2013-06-14 엘지디스플레이 주식회사 Liquid crystal display device and method of manufacturing the same
DE102009021208A1 (en) * 2009-05-13 2010-11-18 Hella Kgaa Hueck & Co. Lighting device for roads
CN102707348A (en) * 2012-06-28 2012-10-03 深圳市华星光电技术有限公司 Asymmetric diamond mirror structure, light guide plate, backlight module and use thereof
US8858057B2 (en) 2012-06-28 2014-10-14 Shenzhen China Star Optoelectronics Technology Co., Ltd Asymmetric prism structure, light guide plate, backlight module, and application
CN104503011B (en) * 2015-01-05 2017-08-11 京东方科技集团股份有限公司 Prism diaphragm, curved surface backlight and display device
CN104654132B (en) * 2015-02-06 2017-05-31 安徽师范大学 A kind of backlight module for limiting liquid crystal display visual angle
CN104791665B (en) * 2015-04-23 2017-05-10 京东方科技集团股份有限公司 Backlight module, display device and diffusion plate
KR101940921B1 (en) 2017-08-18 2019-01-22 주식회사 포스코 Pattern glass and solar cell module having thereof
US11686967B2 (en) 2018-02-28 2023-06-27 Lg Chem, Ltd. Viewing angle compensation film, polarizing plate comprising same, and display device comprising same
KR102283126B1 (en) * 2018-07-27 2021-07-29 주식회사 엘지화학 Method for manufacturing of film for compensating viewing angle, method for manufacturing of polarizing plate, compensating viewing angle, polarizing plate and display appratus comprising same
WO2023206858A1 (en) * 2022-04-28 2023-11-02 瑞仪(广州)光电子器件有限公司 Backlight module and display device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5608550A (en) * 1994-06-24 1997-03-04 Minnesota Mining And Manufacturing Company Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector
US20030081402A1 (en) * 2001-10-30 2003-05-01 Seong-Man Jeon Backlight device for liquid crystal display devices
US20030137618A1 (en) * 2002-01-18 2003-07-24 Kim Man Soo Light guide plate and liquid crystal display having the same

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0862428A (en) * 1994-08-18 1996-03-08 Dainippon Printing Co Ltd Edge light type surface light source
JPH08248210A (en) * 1995-03-07 1996-09-27 Konica Corp Light condensing sheet
JP3128471B2 (en) * 1995-05-25 2001-01-29 三菱レイヨン株式会社 Prism sheet and backlight
JPH0933706A (en) * 1995-07-14 1997-02-07 Nippon Kayaku Co Ltd Prism sheet and light source unit using same, and liquid crystal display unit
JPH0973004A (en) * 1995-09-06 1997-03-18 Nippon Kayaku Co Ltd Laminate of prism sheet, light source device using the same and liquid crystal display device
JPH10253807A (en) * 1997-03-10 1998-09-25 Dainippon Printing Co Ltd Prism array film and edge light type surface light source
JP3669541B2 (en) * 1997-06-12 2005-07-06 株式会社エンプラス Sidelight type surface light source device
JPH1184379A (en) * 1997-09-08 1999-03-26 Bridgestone Corp Back light
JPH1184110A (en) * 1997-09-12 1999-03-26 Bridgestone Corp Prism sheet and back light
JPH1195216A (en) * 1997-09-25 1999-04-09 Bridgestone Corp Back light
WO2000057241A1 (en) * 1999-03-24 2000-09-28 Lg Chemical Ltd. A backlight system
JP2005055736A (en) * 2003-08-06 2005-03-03 Sharp Corp Optical sheet and liquid crystal display and display apparatus equipped with the optical sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5608550A (en) * 1994-06-24 1997-03-04 Minnesota Mining And Manufacturing Company Front-lit liquid crystal display having brightness enhancing film with microridges which directs light through the display to a reflector
US20030081402A1 (en) * 2001-10-30 2003-05-01 Seong-Man Jeon Backlight device for liquid crystal display devices
US20030137618A1 (en) * 2002-01-18 2003-07-24 Kim Man Soo Light guide plate and liquid crystal display having the same

Also Published As

Publication number Publication date
EP1664867A2 (en) 2006-06-07
KR20060066092A (en) 2006-06-15
CN100414327C (en) 2008-08-27
WO2005017581A2 (en) 2005-02-24
JP2007503007A (en) 2007-02-15
CN1836178A (en) 2006-09-20
TW200528854A (en) 2005-09-01

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