Patent Number: 6,169,633

Title: Lenticular lens sheet and transmission type screen using the same

Abstract: A lenticular lens sheet 10A comprises, on the light-entering surface thereof, a light-entering lens part in which a plurality of light-entering lenses 11 are formed, and, on the light-emerging surface, a light-emerging lens part in which a plurality of light-emerging lenses 12 are formed. The light-emerging lenses 12 are so arranged that they respectively correspond to the condensing positions of the light-entering lenses 11. Further, a protruded portion 13A having a substantially rectangular cross section is formed on the light-emerging surface, at a position corresponding to the non-condensing position of each one of the light-entering lenses 11, and a black stripe 14 is formed on the top face 13a of this protruded portion 13A by the application of a light-absorbing agent. The light-entering lens 11 is in the shape of a convex lens projecting toward the light-entering side, and so designed that its condensing point will be inside the lenticular lens sheet 10A. Further, the light-emerging lens 12 is in the shape of a concave lens projecting toward the inside of the lenticular lens sheet 10A. By this, it is possible to make the lenticular lens thick while keeping the pitch thereof fine, and, moreover, to increase the black stripe rate.

Inventors: Watanabe; Hitomu (Tokyo-To, JP)

Assignee: Dai Nippon Printing Co., Ltd.

International Classification: G02B 3/00 (20060101); G03B 21/62 (20060101); G02B 027/10 (); G03B 021/60 ()

Expiration Date: 01/02/2018