Loading patent…
AssigneeDai Nippon Printing Co., Ltd.
InventorsSatoru HAMADA, Keiji KASHIMA, Takashi KURODA, Hirofumi YUMOTO
Estimating the term…
A main object of the present invention is to provide a rotating plate hardly generating variation in the rotation angle of the liner polarization so as to easily realize a desired rotation angle, and a liquid crystal display device enabling observation of a bright image by use thereof even in a state with a polarizing glasses put on. To attain the object, the present invention provides an optical rotation plate comprising a transparent substrate, and an optical rotation layer formed on the transparent substrate and containing a rod-shaped compound for forming a cholesteric structure and having a function of rotating transmitted liner polarization, wherein the cholesteric structure has a 90 degrees or larger twist angle and a pitch in a range of 450 nm to 4,000 nm.
An optical rotation plate comprising a transparent substrate, and an optical rotation layer formed on the transparent substrate and containing a rod-shaped compound for forming a cholesteric structure, and having a function of rotating a polarization axis of transmitted liner polarization,
A liquid crystal display device comprising a liquid crystal cell, a polarizer disposed on the display side of the liquid crystal cell, and an optical rotation plate disposed on the display side of the polarizer and having a function of rotating a polarization axis of linear polarization transmitted the polarizer,
A liquid crystal display device comprising a liquid crystal cell, a polarizer disposed on the display side of the liquid crystal cell, and an optical conversion layer disposed on the display side of the polarizer and having a function of converting linear polarization transmitted the polarizer into elliptical polarization.
Dependencies are inferred from the claim text.