ROLLED WEB FOR WIDEBAND QUARTER-WAVE PLATE, ROLLED WEB FOR WIDEBAND CIRCULARLY POLARIZING PLATE, ROLLED WEB FOR OPTICAL DEVICE, AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a rolled web for a long-length wideband quarter-wavelength plate having a sufficiently wide band and capable of corresponding to any size, to provide a method for efficiently manufacturing this rolled web for the quarter-wavelength plate at low cost, to provide a rolled web for a wideband circularly polarizing plate using this original rolled web for the quarter-wavelength plate, and to provide a display device, or the like.;SOLUTION: This rolled web for the wideband quarter-wavelength plate consists of a long-length laminated body comprising at least an optically anisotropic layer A having a retardation of 250 to 300 nm measured at a wavelength of 550 nm and an optical anisotropic layer B having a retardation of 125 to 150 nm measured at a wavelength of 550 nm. One of the optical anisotropic layers A and B is an optically anisotropic film obtained by drawing a thermoplastic resin film, and the other consists of a film of a immobilized liquid crystal compound. This invention comprises a method for manufacturing the rolled web for the wideband quarter-wavelength plate, the rolled web for the wideband circularly polarizing plate using the wideband quarter-wavelength plate, and a display device provided with the wideband circularly polarizing plate obtained by cutting the rolled web for the wideband circularly polarizing plate.;COPYRIGHT: (C)2004,JPO&NCIPI