Dai Nippon Insatsu Kabushiki Kaisha

Makoto Honda

Seiichi Nishikawa

Yutaro Moriguchi

Akira Izawa

A rear projection or translucent screen consisting of a circular Fresnel lens consisting of a plurality of concentrically circular lens elements and a lenticular lens having a plurality of corrugated parallel convex lens elements. Parallel projections or ridges are formed on the surface opposite to the lens surface of the lenticular lens and masking stripes are formed over the projections or ridges. The side surfaces of the projections or ridges are so defined that they will not intercept the light rays emerging from the corrugated parallel convex lens elements. According to one embodiment of the present invention, the top of each of the projections or ridges is formed with a groove and an ink is filled into the groove. According to another embodiment of the present invention, the position of each projection or ridge is deviated from the boundary between the adjacent corrugated parallel convex lens elements by a distance which is determined by a predetermined relationship.

Rear projection screen

A rear projection screen has a rear side consisting of an array of convex lenses and a front side consisting of also convex lenses whose optic axes are substantially in line with those of the convex lenses at the rear side. Projections or raised portions are provided which surround the front convex lenses and are extended forwardly thereof and light masking strips or layers are formed over the projections or raised portions.

A magnetic recording structure comprises (1) a substrate having an outer surface, and (2) a laminar magnetic recording piece disposed adjacent to at least one part of the outer surface of the substrate, the recording piece comprising a magnetic layer, a color layer and a non-magnetic metal deposition layer interposed between the magnetic layer and the color layer, the magnetic layer being closer to the substrate than the color layer. The non-magnetic metal deposition layer disposed on the magnetic layer has high hiding power and, even in the form of an extremely thin layer, can effectively hide the color of the magnetic material. Accordingly, this magnetic recording structure can be produced with a surface of a beautiful color without impairing its magnetic characteristics.

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Kamifukuoka, Japan

Makoto Honda