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Exercise Devices

Lenticular-lens-sheet-with-both-a-base-sheet-having-lenticular-elements-and-a-surface-diffusing-part-having-elements-of-elementary-shape-smaller-than-lenticular-elements

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Lenticular lens sheet with both a base sheet having lenticular elements and a surface diffusing part having elements of elementary shape smaller than lenticular elements

Details

Inventors: Yamashita, Yoshiyuki; Watanabe, Hitomu;
Assignee: Dai Nippon Printing Co., Ltd. (JP)
Primary Examiner: Ball; Michael W.
Assistant Examiner: Haran; John T.
Attorney, Agent or Firm: Parkhurst & Wendel, LLP

A lenticular lens sheet for use as a rear projection screen, comprises a base lenticular lens sheet having a surface provided with a plurality of lenticular elements, and a surface diffusing part having minute diffusing elements. The surface diffusing part is combined with the base lenticular lens sheet by laminating a plastic film having one surface provided with the minute diffusing elements to the base lenticular lens sheet so that the minute diffusing elements lie on the surfaces of the lenticular elements or by embossing the minute diffusing elements in the surfaces of the lenticular elements of the base lenticular lens sheet with an embossing plastic film having a surface of a shape complementary to the minute diffusing elements.

DETAILED DESCRIPTION Accordingly, it is an object of the present invention to provide a lenticular lens sheet provided with lenticular elements of a complicated, minute, elaborate shape which could not have been formed.
Another object of the present invention is to provide a method of fabricating a lenticular lens sheet provided with lenticular elements of a complicated, minute, elaborate shape which could not have been formed.
A lenticular lens sheet of the present invention having lenticular elements of a minute construction and excellent optical characteristics can be formed by a special method different from the conventional method without requiring an increase in the dimensional accuracy of a die.
A lenticular lens sheet of the present invention is intended to be used as a rear projection screen.
According to a first aspect of the present invention, a lenticular lens sheet comprises a base lenticular lens sheet having a light entrance surface provided with a plurality of lenticular elements, and a surface diffusing part having minute diffusing elements minuter than the lenticular elements and formed on the surfaces of the lenticular elements of the base lenticular lens sheet.
According to a second aspect of the present invention, a lenticular lens sheet comprises a base lenticular lens sheet provided on one surface thereof with lenticular elements, and a plastic film provided on one surface thereof with minute diffusing elements of an ionizing radiation setting resin, such as an ultraviolet setting resin (UV setting resin) or an electron beam setting resin (EB setting resin), and laminated to the base lenticular lens sheet.
According to a third aspect of the present invention, a lenticular lens sheet comprises a base lenticular lens sheet provided on one surface thereof with lenticular elements, and a surface diffusing part having minute diffusing elements minuter than the lenticular elements, and formed on the surfaces of the lenticular elements of the base lenticular lens sheet so as to extend perpendicularly to the lenticular elements of the base lenticular lens sheet by press working

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