Liquid crystal display device having a prism sheet between first and second light diffusion

Abstract

In a liquid crystal display device capable of performing as both a transmissive display and a reflective display using a transmissive type liquid crystal display panel, the influence attributed to a shade as viewed from the oblique direction can be reduced so that favorable visibility can be ensured. In a liquid crystal display device including a transmissive type liquid crystal display panel which sandwiches a liquid crystal layer between a pair of substrates and a backlight which is arranged at a back face of the liquid crystal display panel and has a light source and a reflector, wherein the device is capable of performing as a transmissive display using light from the light source and as a reflective display using external light incident from a front face side of the liquid crystal display panel by reflecting the external light on the reflector, at least two or more light diffusion layers are arranged between the back-face-side substrate out of the pair of substrates and the reflector of the backlight.

1 . A liquid crystal display device comprising:
 a transmissive type liquid crystal display panel which sandwiches a liquid crystal layer between a pair of substrates;   a light source;   a light guide body which is arranged at a back face side of the liquid crystal display panel and on which light from the light source is incident; and   a reflector which is arranged at a back face of the light guide body,   wherein the liquid crystal display device is configured to simultaneously perform as a transmissive display which transmits the light form the light source therethrough and as a reflective display which reflects external light incident from a front face side of the liquid crystal display panel by the reflector,   a first polarizer is arranged between the back-face-side substrate of the pair of substrates and the light guide body, the first polarizer is formed to absorb polarized light having a predetermined polarization direction,   a first light diffusion layer and a second light diffusion layer are arranged between the back-face-side substrate of the pair of substrates and the light guide body,   a prism sheet and a second polarizer are arranged between the first light diffusion layer and the second light diffusion layer,   the first polarizer is provided with an antiglare layer as the first light diffusion layer, and   the second polarizer is a reflection polarizer.   
   
   
       2 . A liquid crystal display device according to  claim 1 ,
 wherein the first light diffusion layer and the second light diffusion layer diffuse the external light and make a shade hardly apparent when viewed from an oblique direction.   
   
   
       3 . A liquid crystal display device according to  claim 1 ,
 wherein the second light diffusion layer is a diffusion film.   
   
   
       4 . A liquid crystal display device according to  claim 1 ,
 wherein the second light diffusion layer is a diffusion sheet.