Optical member, polarizing plate set, and liquid crystal display apparatus
A technology of optical components and polarizers, applied in optical components, optics, nonlinear optics, etc., can solve problems such as color change and color shift
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example 1
[0146](Fabrication of film for the first retardation layer)
[0147] Using a tenter stretching (tenter stretching) machine, at a temperature of 158° C., a commercially available polymer film (manufactured by Optes Co., Ltd., trade name “ZeonorFilm ZF14-130”) whose main component is a cyclic polyolefin-based polymer was tested. ” (thickness: 60 μm, glass transition temperature: 136° C.)) was subjected to fixed-end uniaxial stretching in its width direction so that its film width became three times larger than the original film width (lateral stretching step). The resulting film is a negative biaxial plate (three-dimensional refractive index: nx>ny>nz) with the fast axis in the transport direction. The negative biaxial plate has an in-plane retardation of 118 nm and an Nz coefficient of 1.16.
[0148] (Making film for the second retardation layer)
[0149] Styrene-maleic anhydride copolymer pellet resin (manufactured by Nova Chemicals Japan Ltd., product name: "DYLARK D232") w...
example 2
[0165] A liquid crystal display device using the optical member of the present invention was produced in the same manner as in Example 1, except that the optical member was produced so that the thickness of the low-refractive index layer became 800 nm.
example 3
[0167] In the same manner as in Example 1, a liquid crystal display device using optical components was fabricated except that a low-refractive index layer was obtained in the following manner. That is, an airgel layer is formed on the surface of the prism sheet on the side opposite to the prism portion by utilizing the rebound phenomenon, and this layer is used as the low refractive index layer. The airgel layer was fabricated according to the procedure described in Example 1 of Japanese Patent Application Laid-Open No. 2006-011175.
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