Title:
OPTICAL FILM
Document Type and Number:
WIPO Patent Application WO/2013/122214
Kind Code:
A1
Abstract:
In order to improve light utilization efficiency and provide an optical sheet that can be made thinner, an optical sheet (5) of one embodiment of the present invention is provided with a plurality of first prisms (13), a quarter wave plate (11) and a polarization separation element (12), in that order, from the light incident side to the light exit side. Each first prism (13) has a first surface (13a) where light enters, and a second surface (13b) where the light that has entered is reflected toward the light exit side. Second prisms (14) for reflecting light are provided between first prisms (13) aligned in the in-plane direction.
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Inventors:
UCHIDA TATSUO
SUZUKI YOSHITO
KAWAKAMI TOHRU
SEKIYA KAZUO
NISHIZAWA MASAHIRO
ISHINABE TAKAHIRO
EHARA KATSUNORI
HASHIMOTO YOSHIHIRO
ITOH YASUHISA
YAMAMOTO YOSHITAKA
ISHII YUTAKA
SUZUKI YOSHITO
KAWAKAMI TOHRU
SEKIYA KAZUO
NISHIZAWA MASAHIRO
ISHINABE TAKAHIRO
EHARA KATSUNORI
HASHIMOTO YOSHIHIRO
ITOH YASUHISA
YAMAMOTO YOSHITAKA
ISHII YUTAKA
Application Number:
PCT/JP2013/053727
Publication Date:
August 22, 2013
Filing Date:
February 15, 2013
Export Citation:
Assignee:
SHARP KK (JP)
UNIV TOHOKU (JP)
UNIV TOHOKU (JP)
International Classes:
G02B5/30; F21S2/00; F21V5/00; G02B5/02; G02B5/04; G02F1/13357
Domestic Patent References:
WO2004015330A1 | 2004-02-19 |
Foreign References:
JP2010072287A | 2010-04-02 | |||
JP2010231896A | 2010-10-14 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
Patent business corporation Hara [Kenzo] international patent firm (JP)
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