Title:
プリズムシート
Document Type and Number:
Japanese Patent JP3607759
Kind Code:
B2
Abstract:
A prism sheet having a plurality of substantially triangular prism-shaped lens units with their longitudinal axes almost parallel to each other arranged on one side and having the other side roughened, and with a characteristic value of 100 when said roughned side is smooth, the characterstic values are not less than 50 in glossiness, not more than 70 in internal reflective ability, and not more than 70 in friction coefficient when the plane including the prism peaks is rubbed by the roughened surface. The prism sheet of the present invention is therefrom free from interference fringes, substantially safe from scratching and uniform and high in brightness, being thus useful for liquid crystal devices etc.
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Inventors:
Hiiragi Ohara
Takumi Kosugi
Osamu Kawaguchi
Tetsuro Tanabe
Kenji Kawashima
Tsuyama friend
Takumi Kosugi
Osamu Kawaguchi
Tetsuro Tanabe
Kenji Kawashima
Tsuyama friend
Application Number:
JP25687195A
Publication Date:
January 05, 2005
Filing Date:
September 08, 1995
Export Citation:
Assignee:
Goyo Paper Co., Ltd.
International Classes:
F21V5/02; F21V8/00; G02B5/02; G02B5/04; (IPC1-7): G02B5/02; G02B5/04
Domestic Patent References:
| JP6109925A |
Attorney, Agent or Firm:
Kenji Itami