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Title:
FUNCTIONAL FILM, SURFACE LIGHT SOURCE DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/045098
Kind Code:
A1
Abstract:
Provided are: a functional film which can further enhance directionality while maintaining light utilization efficiency and can improve view angle contrast and halo; a surface light source device; and a liquid crystal display device. The functional film comprises: a plurality of lenses arranged at predetermined pitches on the emission side of the light source; a first support that is disposed closer to the light source side than the lens, has a thickness equal to or larger than the pitch of the lenses, and has a refractive index of 1.5 or more; and a light reflection layer that is disposed closer to the light source side than the first support, has a reflectance of 90% or more, and has openings on the optical axis of the plurality of lenses, the opening ratio of the openings being 30%-70%.

Inventors:
SEKIGUCHI MEGUMI (JP)
TAMADA TAKASHI (JP)
WATANABE SHINYA (JP)
Application Number:
PCT/JP2018/032614
Publication Date:
March 07, 2019
Filing Date:
September 03, 2018
Export Citation:
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Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/02; F21S2/00; G02B3/00; G02B5/00; G02B5/08; G02F1/13357
Domestic Patent References:
WO2010113737A12010-10-07
Foreign References:
JP2010054541A2010-03-11
JP2006318886A2006-11-24
JP2005221619A2005-08-18
JPH10241434A1998-09-11
JP2007003908A2007-01-11
US20100060817A12010-03-11
JP2011064875A2011-03-31
JP2001305306A2001-10-31
JP2002131837A2002-05-09
JP2003195055A2003-07-09
JP2001305312A2001-10-31
JP2008192589A2008-08-21
JP2014092602A2014-05-19
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
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