JP2008256883A5 - - Google Patents

Claims (11)

  A resin layer having a polystyrene-reduced molecular weight of 5,000 or less, defined by the method described in the specification, having a content W of 5% by weight or less, and a plurality of linear layers formed on the resin layer at intervals A reflective polarizing plate composed of a metal layer (hereinafter referred to as a linear metal layer). The resin layer has a thermoplastic resin as a main component, and the polystyrene equivalent weight average molecular weight Mw by GPC of the thermoplastic resin is 10,000 or more, and the polystyrene equivalent weight average molecular weight Mw and polystyrene equivalent number average molecular weight Mn by GPC. The reflective polarizing plate according to claim 1, wherein the polydispersity Mw / Mn calculated from is 3.0 or less. Ri thickness H is 10~200nm der of the linear metal layer, and the pitch P = 50 to 400 nm, the reflection-type polarizing according to claim 1 or 2 are formed with a width W = 20~380nm Board. It said linear metal layer, aluminum, silver, chromium, and reflective polarizer according to any one of claims 1 to 3, at least one metal selected from the group consisting of gold as a main component. On the surface of the resin layer, linear resin patterns (hereinafter referred to as linear resin patterns) arranged in parallel are formed, and convex portions in a cross section perpendicular to the longitudinal direction of the linear resin pattern are formed . The shape is pitch p = 50 to 400 nm, width w = 20 to 380 nm, and height h = 10 to 400 nm, and the ratio (h / w) of height h to width w of the linear resin pattern is 0. The reflective polarizing plate according to any one of claims 1 to 4, which is from 5 to 5. The resin layer is a thermoplastic resin as a main component, and heat the polystyrene reduced weight average molecular weight Mw by GPC of thermoplastic resin Ri der 10,000, and the polystyrene equivalent Z average molecular weight Mz and terms of polystyrene by GPC The reflective polarizing plate according to claim 5, wherein the polydispersity Mz / Mw calculated from the weight average molecular weight Mw is 2.0 or less. The reflective polarizing plate according to any one of claims 5 to 6 , wherein the linear metal layer is formed on a top of a convex portion of the linear resin pattern. The reflective polarizing plate according to claim 5, wherein the resin layer is made of a polyester resin having an alicyclic group. The reflective polarizing plate according to claim 5, wherein the resin layer is laminated with a support layer, and the support layer is a biaxially stretched polyester film. A liquid crystal display device in which at least a surface light source, the reflective polarizing plate according to claim 1, and a liquid crystal cell are arranged in this order, the liquid crystal cell including a liquid crystal layer and the liquid crystal layer A polarizing plate (A) and a polarizing plate (B) arranged so as to sandwich the liquid crystal cell, the direction of the polarization axis of the polarized light transmitted through the polarizing plate (B) on the surface light source side constituting the liquid crystal cell, and the reflection A liquid crystal display device in which the direction of the polarization axis of the polarized light passing through the polarizing plate coincides , and the reflective polarizing plate is installed so that the linear metal layer faces the liquid crystal cell. A liquid crystal display device comprising a surface light source and a liquid crystal cell, the liquid crystal cell having a liquid crystal layer, a polarizing plate (A) and a polarizing plate (B) disposed so as to sandwich the liquid crystal layer, reflective polarizer der according to any one of the surface light source side polarizing plate (B) is according to claim 1-9 is, and the reflective polarizing plate is such that the linear metal layer facing the liquid crystal layer Liquid crystal display device installed in