Title:
OPTICAL SHEET AND SURFACE LIGHT SOURCE APPARATUS
Document Type and Number:
WIPO Patent Application WO/2014/017363
Kind Code:
A1
Abstract:
An optical sheet comprising: a transparent substrate; a light diffusion layer having a surface roughness structure which is provided on one surface of the transparent substrate; and a light diffusion adhesive layer provided on the other surface of the transparent substrate, wherein the light diffusion layer comprises a resin and first diffusion particles having a number-average particle size of 1.7 μm or above, the light diffusion adhesive layer comprises a binder, highly refractive nanoparticles and second diffusion particles, and the relationship x1 > x2 is satisfied, where the haze of the light diffusion layer is x1 (%) and the haze of the light diffusion adhesive layer is x2 (%); and a surface light source apparatus provided with said optical sheet and an organic electroluminescent light-emitting element.
Inventors:
INOUE HIROYASU (JP)
Application Number:
PCT/JP2013/069450
Publication Date:
January 30, 2014
Filing Date:
July 17, 2013
Export Citation:
Assignee:
ZEON CORP (JP)
International Classes:
G02B5/02; F21V3/04; H01L51/50; H05B33/02
Domestic Patent References:
WO2011078092A1 | 2011-06-30 | |||
WO2011078092A1 | 2011-06-30 |
Foreign References:
JP2007114760A | 2007-05-10 | |||
JP2012069257A | 2012-04-05 |
Other References:
See also references of EP 2878978A4
Attorney, Agent or Firm:
SAKAI, HIROAKI (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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