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Title:
LIGHT SOURCE DEVICE, SURFACE LIGHT SOURCE DEVICE, DISPLAY DEVICE, AND ILLUMINATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/147646
Kind Code:
A1
Abstract:
This surface light source device comprises a light source and a light guide body. The light source has at least a light-emitting element having a light-emitting surface and a concave mirror for reflecting the light emitted from the light-emitting element. The light guide body has an end surface from which light emitted from the light source is incident, and a primary surface from which the light, having propagated within the interior, is emitted. At least a part of the cross-sectional shape of the concave mirror when cut in a plane parallel to the primary surface of the light guide body has a curved shape having a focus point. The light-emitting element is disposed such that the focus point is located on the light-emitting surface. The light from the light-emitting element is incident on the light guide body via the concave mirror.

Inventors:
KATSUTA SHOHEI
KAMADA TSUYOSHI
SHINOZAKI DAISUKE
TSUJIMOTO MASAHIRO
Application Number:
PCT/JP2012/060709
Publication Date:
November 01, 2012
Filing Date:
April 20, 2012
Export Citation:
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Assignee:
SHARP KK (JP)
KATSUTA SHOHEI
KAMADA TSUYOSHI
SHINOZAKI DAISUKE
TSUJIMOTO MASAHIRO
International Classes:
F21S2/00; F21V5/00; F21V5/04; F21V7/00; F21V7/06; G02F1/13357; F21Y101/02
Domestic Patent References:
WO2007032116A12007-03-22
Foreign References:
JP2005221706A2005-08-18
JP2007234385A2007-09-13
JP2011002544A2011-01-06
JP2008098190A2008-04-24
JP2002100217A2002-04-05
Attorney, Agent or Firm:
FUNAYAMA Takeshi et al. (JP)
Takeshi Funayama (JP)
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