Patent ID: 6746130
Filing Date: 2004-06-08
Classification: G02B

Abstract:
A light control sheet having a face to provide a light input face and another face to provide a light output face, said light input face being provided with a great number of projection rows running in parallel with each other,wherein each of said great number of projection rows includes a first face and a second face, said second face being inclined with respect to a frontal direction of said light output face of said light control sheet and having a variation in inclination angle such that the inclination angle gets smaller with a decreasing distance from said light output face, said first face being formed so as to introduce an input light containing both a main light beam, which travels in a direction inclined with respect to said frontal direction, and a first subsidiary light beam, which travels in a direction angularly nearer to said frontal direction before being introduced to said first face as compared with said main light beam, and further as to then cause said input light to be incident to said second face.