Patent ID: 7724434
Filing Date: 2010-05-25
Classification: G02B,G02F

Abstract:
1. A reflective polarizer suitable for use in a display device, the reflective polarizer comprising: a multilayer optical film comprising alternating layers of first and second polymeric layers, the first and second polymeric layers having refractive indices along an in-plane x-axis that differ sufficiently to substantially reflect light of a first polarization state, the first and second polymeric layers having refractive indices along an in-plane y-axis that are matched sufficiently to substantially transmit light of a second polarization state, wherein the x- and y-axes are orthogonal, wherein at least one of the first and second polymeric layers comprises naphthalate functionality; and first and second skin layers disposed on opposite sides of the multilayer optical film; wherein at least one of the first and second polymeric layers and the first and second skin layers comprises an ultraviolet (UV) absorber that absorbs UV light and transmits visible light, such that for normally incident light of the second polarization state, the reflective polarizer has an internal percent transmission of at least 95% at 410 nm, and at most 25% at 380 nm.