| 摘要 |
PURPOSE:To provide the liquid crystal display device and illumination device having high efficiency of utilizing light by providing the light exit side surface of a surface light transmission body with a light deflecting means and further, arranging a polarized light separator thereon. CONSTITUTION:The polarized light separator 6 which is a multilayered structural body is combined with an edge light type back light which is formed by bringing a fluorescent lamp (cold cathode discharge tube) 1 into tight contact with one side of a light transmission body 3 made of a transparent acrylic resin which is an illumination surface and providing the light transmission body in which the light is guided with a lamp cover 2 consisting of a reflector. Further, the rear surface of the light transmission body 3 and the light transmission body flank opposite to the surface to be installed with the fluorescent tube are provided with a phase difference plate 4 and a reflection surface consisting of a reflection film made of an Al metallic sheet is formed thereon. A prism array having an isosceles triangle shape in sectional shape is used as a prism array 7 and is so arranged that its vertexes face to the light transmission body 3. The polarized light separator 6 are mounted thereon and further, a diffusion plate 8 is used on the light exit surface side of the polarized light separator 6 in order to widen a visual field angle. |
