Polarization light splitting film, backlight system and liquid crystal display
AssigneeDai Nippon Printing Co., Ltd.
InventorsFumihiro Arakawa, Keiji Kashima
Life of this patent
Estimating the term…
Abstract
A polarization light splitting film having a light receiving side and a light transmitting side. The polarization light splitting film includes an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam, and a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side.
Claims44
A polarization light splitting film having a light receiving side and a light transmitting side, the polarization light splitting film comprising:
- an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam;
- and
- a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side.
A backlight system comprising:
- a polarization light splitting film having a light receiving side and a light transmitting side, the polarization light splitting film including:
- an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam;
- and
- a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side;
- a light source for emitting a light beam;
- and
- a light guide disposed at the light receiving side of the polarization light splitting film for guiding the light beam emitted from the light source towards the polarization light splitting film as the incident light.
A liquid crystal display device comprising:
- a polarization light splitting film having a light receiving side and a light transmitting side, the polarization light splitting film including an optical rotation selection layer at the light receiving side for reflecting one of right and left circularly polarized components of a light beam that is incident on the light receiving side and for transmitting the other one of the right and left circular polarization components of the light beam, the polarization light splitting film further including a quarter-wave layer laminated over the optical rotation selection layer at the light transmitting side;
- a light source for emitting a light beam;
- a light guide disposed at the light receiving side of the polarization light splitting film for guiding the light beam emitted from the light source towards the polarization light splitting film as the incident light;
- and
- a liquid crystal cell receiving the light transmitted from the polarization light splitting film in order to display at least one image.
Dependencies are inferred from the claim text.