Stock material or miscellaneous articles – Structurally defined web or sheet – Including aperture
Patent
1986-10-09
1988-11-29
Thomas, Alexander S.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including aperture
428137, 428596, 428913, 350370, 350374, 350392, B32B 310, G02B 530, G02B 2728
Patent
active
047880945
ABSTRACT:
The disclosure relates to a light controlling sheet for use with indicators which includes a louver element including an arbitrary pattern of walls which are parallel to each other and opaque so as to absorb light, and an electrically conductive film which is mounted on one surface of the louver element. This film is porous so that the light from a light source may penetrate. The oblique light strikes the opaque walls of the louver element and is absorbed in the walls, while the substantially parallel light is permitted to pass through the space or transparent portion betwee the walls. The electrically conductive film not only acts as a protective cover for the louver element but also shields unwanted electromagnetic wave.
REFERENCES:
patent: 4232104 (1980-11-01), Shinozaki et al.
Goto Masakazu
Kojima Takeshi
Morita Masayuki
Takahashi Hiroaki
Takeuchi Noboru
Kabushiki Kaisha Tokai Rika Denki Seisakusho
Thomas Alexander S.
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