Liquid crystal display device and viewing angle control module
AssigneeSharp Kabushiki Kaisha
InventorsTakehiko Sakai, Tsuyoshi Okazaki, Katsuhiko Morishita, Yoshiharu Kataoka, Chikanori Tsukamura, Dai Chiba
Life of this patent
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Abstract
In a liquid crystal display device including a display liquid crystal panel and a viewing-angle-control liquid crystal panel and capable of switching viewing angle characteristics, a half wavelength plate for setting a viewing restricted direction is provided between the display liquid crystal panel and the viewing-angle-control liquid crystal panel. This makes it possible to realize a liquid crystal display device that allows a viewing restricted direction to be set as appropriate.
Claims8
A liquid crystal display device that is capable of switching viewing angle characteristics, the liquid crystal display device comprising:
- a viewing-angle-control liquid crystal panel provided on a viewing surface side between a viewing surface and a backlight, the viewing-angle-control liquid crystal panel including a fourth polarizing member, a viewing-angle-control liquid crystal cell, and a third polarizing member provided in this order so as to be at least partially overlapped from the viewing surface;
- a display liquid crystal panel provided on a backlight side between the viewing surface and the backlight, the display liquid crystal panel including a second polarizing member, a display liquid crystal cell, and a first polarizing member provided in this order so as to be at least partially overlapped from the viewing surface;
- and
- a retardation member for setting a viewing restricted direction, the retardation member provided between at least the third polarizing member and the second polarizing member,
- the fourth polarizing member having a transmission axis in a direction that is different from a direction of a transmission axis of the second polarizing member.
A liquid crystal display device that is capable of switching viewing angle characteristics, the liquid crystal display device comprising:
- a display liquid crystal panel provided on a viewing surface side between a viewing surface and a backlight, the display liquid crystal panel including a second polarizing member, a display liquid crystal cell, and a first polarizing member provided in this order so as to be at least partially overlapped from the viewing surface;
- a viewing-angle-control liquid crystal panel provided on a backlight side between the viewing surface and the backlight, the viewing-angle-control liquid crystal panel including a fourth polarizing member, a viewing-angle-control liquid crystal cell, and a third polarizing member provided in this order so as to be at least partially overlapped from the viewing surface;
- and
- a retardation member for setting a viewing restricted direction, the retardation member provided between at least the first polarizing member and the fourth polarizing member,
- the second polarizing member having a transmission axis in a direction that is different from a direction of a transmission axis of the fourth polarizing member.
Dependencies are inferred from the claim text.