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WO2007049618A1 - Light diffusion plate and direct backlight device - Google Patents

Light diffusion plate and direct backlight device

Info

Publication number
WO2007049618A1
WO2007049618A1 PCT/JP2006/321169 JP2006321169W WO2007049618A1 WO 2007049618 A1 WO2007049618 A1 WO 2007049618A1 JP 2006321169 W JP2006321169 W JP 2006321169W WO 2007049618 A1 WO2007049618 A1 WO 2007049618A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
light
plate
surface
diffusion
incident
Prior art date
Application number
PCT/JP2006/321169
Other languages
French (fr)
Japanese (ja)
Inventor
Kenji Kusano
Original Assignee
Zeon Corporation
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

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing 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
    • G02B5/0226Diffusing 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0205Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/021Diffusing 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
    • G02B5/0231Diffusing 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 microprismatic or micropyramidal shape
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0268Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B5/00Optical elements other than lenses
    • G02B5/02Diffusing elements; Afocal elements
    • G02B5/0273Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278Diffusing elements; Afocal elements characterized by the use used in transmission
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of optical devices, e.g. polarisers, reflectors or illuminating devices, with the cell
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight

Abstract

Disclosed are a light diffusion plate improved in luminance and luminance uniformity, and a direct backlight device. Specifically disclosed is a light diffusion plate for diffusing the light from a light source, which comprises a light incident surface through which the light from the light source enters and a light emitting surface through which the incident light is diffused and emitted. This light diffusion plate is characterized in that the light incident surface is a generally flat surface while the light emitting surface has a prism array having a plurality of linear prisms of a specific shape having a projected or recessed cross section. Also specifically disclosed is a direct backlight device characterized by comprising such a light diffusion plate.
PCT/JP2006/321169 2005-10-28 2006-10-24 Light diffusion plate and direct backlight device WO2007049618A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2005315153 2005-10-28
JP2005-315153 2005-10-28
JP2006027529 2006-02-03
JP2006-027529 2006-02-03

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007542596A JPWO2007049618A1 (en) 2005-10-28 2006-10-24 Light diffusing plate and the direct-type backlight device

Publications (1)

Publication Number Publication Date
WO2007049618A1 true true WO2007049618A1 (en) 2007-05-03

Family

ID=37967728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/321169 WO2007049618A1 (en) 2005-10-28 2006-10-24 Light diffusion plate and direct backlight device

Country Status (2)

Country Link
JP (1) JPWO2007049618A1 (en)
WO (1) WO2007049618A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009036892A (en) * 2007-07-31 2009-02-19 Tomoegawa Paper Co Ltd Directional film and directive diffusion film
JP2009117194A (en) * 2007-11-07 2009-05-28 Puratekku:Kk Light cover and light apparatus
WO2009078439A1 (en) * 2007-12-18 2009-06-25 Takiron Co., Ltd. Optical sheet and backlight unit using the same
NL1036337C (en) * 2007-12-25 2010-06-22 Sumitomo Chemical Co Surface light source device and liquid crystal display.
JP2010204518A (en) * 2009-03-05 2010-09-16 Toppan Printing Co Ltd Optical sheet arranged with unit lens having a plurality of inflection points
WO2013015250A1 (en) * 2011-07-25 2013-01-31 株式会社小糸製作所 Vehicle lighting device
JP2014103129A (en) * 2014-03-11 2014-06-05 Dainippon Printing Co Ltd Light guide plate, surface light source device and display apparatus
US9217821B2 (en) 2011-10-18 2015-12-22 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device, and display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231103A (en) * 1999-02-09 2000-08-22 Mitsubishi Rayon Co Ltd Lens sheet and back light and liquid crystal display device using the same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000231103A (en) * 1999-02-09 2000-08-22 Mitsubishi Rayon Co Ltd Lens sheet and back light and liquid crystal display device using the same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009036892A (en) * 2007-07-31 2009-02-19 Tomoegawa Paper Co Ltd Directional film and directive diffusion film
JP2009117194A (en) * 2007-11-07 2009-05-28 Puratekku:Kk Light cover and light apparatus
WO2009078439A1 (en) * 2007-12-18 2009-06-25 Takiron Co., Ltd. Optical sheet and backlight unit using the same
NL1036337C (en) * 2007-12-25 2010-06-22 Sumitomo Chemical Co Surface light source device and liquid crystal display.
JP2010204518A (en) * 2009-03-05 2010-09-16 Toppan Printing Co Ltd Optical sheet arranged with unit lens having a plurality of inflection points
WO2013015250A1 (en) * 2011-07-25 2013-01-31 株式会社小糸製作所 Vehicle lighting device
JP2013026146A (en) * 2011-07-25 2013-02-04 Koito Mfg Co Ltd Lamp for vehicle
US9217821B2 (en) 2011-10-18 2015-12-22 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device, and display device
JP2014103129A (en) * 2014-03-11 2014-06-05 Dainippon Printing Co Ltd Light guide plate, surface light source device and display apparatus

Also Published As

Publication number Publication date Type
JPWO2007049618A1 (en) 2009-04-30 application

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