| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a forward lighting system capable of suppressing defocusing of an image and lowering of its contrast in a liquid crystal display. <P>SOLUTION: This lighting system is provided with a light source 2, an incidence plane where light emitted from the light source enters, and a light guiding body 3 which is almost perpendicular to the incidence plane and has a light emitting surface to emit illuminating light, and is disposed on the observing surface side of an object to be illuminated. This forward lighting system illuminates the object to be illuminated by providing prism arrays 4 on the surface of the light guiding body and regions having different refractive indexes, and by providing an anisotropic light scattering film 5 having different diffusibility depending on incidence direction of light on the light emitting surface. <P>COPYRIGHT: (C)2003,JPO |
