JP2008181113A5 - - Google Patents

Claims (13)

A substrate, a surface layer (1) having a linear uneven structure (hereinafter referred to as a linear uneven structure) formed on at least one surface of the substrate, and linear unevenness on the surface layer (1) A reflective polarizing plate having a plurality of linear metal layers (hereinafter referred to as linear metal layers) formed substantially parallel to the structure and spaced apart from each other, and having a refractive index N1 of the base material A reflective polarizing plate in which the difference ΔN = | N1−N2 | with the refractive index N2 of the surface layer (1) is 0 to 0.10. The shape of the convex part in the cross section perpendicular | vertical to the longitudinal direction of the said linear concavo-convex structure is pitch p = 50-400 nm, width w = 20-380 nm, and height h = 10-400 nm. Reflection type polarizing plate. The reflective polarizing plate according to claim 1, wherein the linear metal layer is formed on at least the top of the convex portion of the linear concavo-convex structure of the surface layer (1). A base material, an adhesive layer (hereinafter referred to as a surface layer (2)) formed on the surface of at least one side of the base material, and the surface layer (on the surface side of the base material on which the surface layer (2) is formed) 2) a reflective polarizing plate having a plurality of linear metal layers (hereinafter referred to as linear metal layers) formed in contact with each other at intervals, the refractive index N1 of the substrate and the surface layer ( A reflective polarizing plate in which the difference ΔN = | N1−N2 | in the refractive index N2 of 2) is 0 to 0.10. The reflective polarizing plate according to any one of claims 1 to 4 , wherein the surface layer (1) or the surface layer (2) comprises a resin as a main component. Reflective polarizer according to any one of claims 1 to 5 the thickness h2 of the linear metal layer is 10 to 200 nm, the pitch p2 = 50 to 400 nm and a width w2 = 20~380nm. The reflective polarizing plate according to any one of claims 1 to 6 , wherein a ratio h2 / w2 between the film thickness h2 and the width w2 of the linear metal layer is 0.5 or more. It said linear metal layer, aluminum, silver, chromium, and reflective polarizer according to any one of claims 1 to 7, at least one metal selected from the group consisting of gold is to the main component. Wherein the substrate, the reflective polarizer according to any one of claims 1-8 having flexibility. A liquid crystal display device in which a surface light source, the reflective polarizing plate according to any one of claims 1 to 9 , and a liquid crystal cell are arranged in this order, wherein the liquid crystal cell sandwiches the liquid crystal layer and the liquid crystal layer. The polarizing axis (A) and the polarizing plate (B) arranged as described above, the direction of the polarization axis of the polarized light passing through the polarizing plate (B) on the surface light source side constituting the liquid crystal cell, and the reflection type A liquid crystal display device in which the direction of the polarization axis of the polarized light passing through the polarizing plate matches. The liquid crystal display device according to claim 10 , wherein the reflective polarizing plate is disposed such that a 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 reflective polarizing plate (A) and a polarizing plate (B) disposed so as to sandwich the liquid crystal layer. The liquid crystal display device wherein the polarizing plate (B) on the surface light source side is the reflective polarizing plate according to any one of claims 1 to 11 . The liquid crystal display device according to claim 12 , wherein the reflective polarizing plate is disposed such that a linear metal layer faces the liquid crystal layer.