Title:
LOUVER FILM, PLANAR LIGHT SOURCE DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/111763
Kind Code:
A1
Abstract:
Provided are: a louver film capable of improving halo and viewing angle contrast, and further improving the directionality of visibility while maintaining light use efficiency; a planar light source device; and a liquid crystal display device. The louver film comprises: a plurality of lenses arranged at a constant pitch on the emission side of the light source; a first support body which is positioned on the light source-side of the lens, has a thickness equal to or greater than the lens pitch, and has a refractive index of 1.5 or higher; and a light-reflecting layer positioned on the light source-side of the first support body, having a reflectance of 90% or higher, and having openings which are positioned along the optical axes of the plurality of lenses and have a numerical aperture of 30-70%.
Inventors:
SEKIGUCHI MEGUMI (JP)
TAMADA TAKASHI (JP)
WATANABE SHINYA (JP)
TAMADA TAKASHI (JP)
WATANABE SHINYA (JP)
Application Number:
PCT/JP2018/043575
Publication Date:
June 13, 2019
Filing Date:
November 27, 2018
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/00; F21S2/00; G02F1/13357; F21Y115/10
Foreign References:
| JP2009053607A | 2009-03-12 | |||
| JP2017072720A | 2017-04-13 | |||
| JP2005148440A | 2005-06-09 | |||
| JP2009500663A | 2009-01-08 | |||
| JP2003091004A | 2003-03-28 | |||
| JP2006318886A | 2006-11-24 | |||
| JP2010044921A | 2010-02-25 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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