Title:
SURFACE-AREA LIGHT SOURCE DEVICE USING LIGHT MIXING MEANS
Document Type and Number:
WIPO Patent Application WO/2007/125987
Kind Code:
A1
Abstract:
A surface-area light source device having a light guide body (3) having a light
entry end surface (31) and a light exit surface (33), a primary light source (1)
placed adjacent to the light entry end surface (31), and light mixing means for
light emitted from the primary light source (1) and entering into the light entry
end surface (31). The light mixing means includes a light control element (2)
placed along the light entry end surface (31). The light control element (2)
has a first main surface facing the light entry end surface (31) and also has a second
main surface on the opposite side of the first main surface. When only the light
that is out of light fluxes from the primary light source (1) and advances in the
direction less than or equal to 20 degrees relative to the direction normal to
the second main surface is made to enter in the second main surface, the light control
element (2) causes the amount of light emitted in the direction less than or equal
to 20 degrees relative to the direction normal to the first main surface is 50%
or less of the light amount when the entire light fluxes from the primary light
source (1) is caused to enter in the second main surface.
Inventors:
YAMASHITA TOMOYOSHI (JP)
OKAMOTO YOSHIYUKI (JP)
OOTSUKI HARUKO (JP)
ONO MASAE (JP)
OKAMOTO YOSHIYUKI (JP)
OOTSUKI HARUKO (JP)
ONO MASAE (JP)
Application Number:
PCT/JP2007/059045
Publication Date:
November 08, 2007
Filing Date:
April 26, 2007
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
YAMASHITA TOMOYOSHI (JP)
OKAMOTO YOSHIYUKI (JP)
OOTSUKI HARUKO (JP)
ONO MASAE (JP)
YAMASHITA TOMOYOSHI (JP)
OKAMOTO YOSHIYUKI (JP)
OOTSUKI HARUKO (JP)
ONO MASAE (JP)
International Classes:
F21V8/00; F21S2/00; G02B6/00; G02F1/13357; F21Y101/02
Foreign References:
| JP2003132722A | 2003-05-09 | |||
| JP2002245832A | 2002-08-30 | |||
| JP2006108032A | 2006-04-20 | |||
| JP2005352426A | 2005-12-22 | |||
| JP2002260427A | 2002-09-13 | |||
| JP2005285702A | 2005-10-13 | |||
| JP3114195U | 2005-09-29 | |||
| JPH05341132A | 1993-12-24 | |||
| JP2005196989A | 2005-07-21 |
Attorney, Agent or Firm:
YAMASHITA, Johei (Toranomon 40th MT Bldg.13-1, Toranomon 5-chome,Minato-k, Tokyo 01, JP)
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