WO2008129711A1 - Surface light-emitting device - Google Patents

Surface light-emitting device Download PDF

Info

Publication number
WO2008129711A1
WO2008129711A1 PCT/JP2007/071912 JP2007071912W WO2008129711A1 WO 2008129711 A1 WO2008129711 A1 WO 2008129711A1 JP 2007071912 W JP2007071912 W JP 2007071912W WO 2008129711 A1 WO2008129711 A1 WO 2008129711A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
waveguide plate
emitting device
light source
prism face
Prior art date
Application number
PCT/JP2007/071912
Other languages
French (fr)
Japanese (ja)
Inventor
Takaharu Shimizu
Original Assignee
Nidec Copal 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
Application filed by Nidec Copal Corporation filed Critical Nidec Copal Corporation
Publication of WO2008129711A1 publication Critical patent/WO2008129711A1/en

Links

Classifications

    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces

Abstract

Light emitted from a light source and having such an exit angle range as showing high luminance distribution is made to travel effectively while spreading transversely in a waveguide plate. In a side light system surface light-emitting device having a waveguide plate (1) and a light source (2), the light entering portion end face (1B) has a first prism face (P1) for deflecting the light emitted from the light source (2) and entering into the waveguide plate (1) toward the transverse direction (X axis direction), and a second prism face (P2) for partially deflecting the light deflected by the first prism face (P1) within such a range as directivity of the light is sustained.
PCT/JP2007/071912 2007-03-31 2007-11-12 Surface light-emitting device WO2008129711A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007095906A JP2008257900A (en) 2007-03-31 2007-03-31 Surface light emitting device
JP2007-095906 2007-03-31

Publications (1)

Publication Number Publication Date
WO2008129711A1 true WO2008129711A1 (en) 2008-10-30

Family

ID=39875250

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/071912 WO2008129711A1 (en) 2007-03-31 2007-11-12 Surface light-emitting device

Country Status (3)

Country Link
JP (1) JP2008257900A (en)
TW (1) TW200848663A (en)
WO (1) WO2008129711A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5467791B2 (en) * 2009-04-09 2014-04-09 日東光学株式会社 LED lighting device and LED light emitting device
KR20120051945A (en) * 2010-11-15 2012-05-23 엘지이노텍 주식회사 Back-light unit
JP5656785B2 (en) 2010-11-24 2015-01-21 三菱電機株式会社 Lighting device and liquid crystal display
JP5725349B2 (en) * 2011-07-25 2015-05-27 ミネベア株式会社 Surface lighting device
JP5773792B2 (en) * 2011-08-03 2015-09-02 株式会社ジャパンディスプレイ Display device
KR102133762B1 (en) * 2013-01-10 2020-07-15 삼성디스플레이 주식회사 Backlight unit and display device having the same
JP6504783B2 (en) * 2014-09-24 2019-04-24 シチズン時計株式会社 Planar light unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10293202A (en) * 1997-04-17 1998-11-04 Enplas Corp Side light type surface light source device
JP2002042534A (en) * 2000-07-31 2002-02-08 Nichia Chem Ind Ltd Light-emitting device
JP2004311099A (en) * 2003-04-03 2004-11-04 Casio Comput Co Ltd Lighting system
JP2005158387A (en) * 2003-11-25 2005-06-16 Omron Corp Surface light source device and apparatus using it
JP2006156279A (en) * 2004-12-01 2006-06-15 Enplas Corp Planar light source device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10293202A (en) * 1997-04-17 1998-11-04 Enplas Corp Side light type surface light source device
JP2002042534A (en) * 2000-07-31 2002-02-08 Nichia Chem Ind Ltd Light-emitting device
JP2004311099A (en) * 2003-04-03 2004-11-04 Casio Comput Co Ltd Lighting system
JP2005158387A (en) * 2003-11-25 2005-06-16 Omron Corp Surface light source device and apparatus using it
JP2006156279A (en) * 2004-12-01 2006-06-15 Enplas Corp Planar light source device

Also Published As

Publication number Publication date
TW200848663A (en) 2008-12-16
JP2008257900A (en) 2008-10-23

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