Pseudo-luminous panel, substrate therefor, and display element a

Details Pseudo-luminous panel, substrate therefor, and display element a Pseudo-luminous panel, substrate therefor, and display element a

1993-07-28

1995-05-16

Ben, Loha

Optical: systems and elements

Diffusing of incident light

359850, 359546, 40560, G02B 502

Patent

active

054166373

ABSTRACT:
A pseudo-luminous panel has a substrate and a thin film optical color filter formed all over the main surface of the substrate with or without a reflecting film interposed therebetween. The main surface of the substrate is formed by obliquely downward and upward band-like surfaces alternately arranged side by side in a vertical direction. The downward band-like surfaces of the substrate, or downward band-like surfaces of the reflecting film formed on the downward band-like surfaces of the substrate are each a smooth reflecting surface. The upward band-like surfaces of the substrate, or the upward band-like surfaces of the reflecting film formed on the upward band-like surfaces of the substrate, are each a smooth, irregular or uneven reflecting surface. Obliquely downward band-like surfaces of the color filter are each a smooth surface extending straight in the longitudinal section of the panel, and obliquely upward band-like surfaces of the color filter are each a rough surface. With the pseudo-luminous panel of such a structure, it is possible to prevent that a pattern on the panel is too dazzling in the daytime and too dark at night to recognize in a predetermined hue when the panel is set up outdoors high above the ground.

REFERENCES:
patent: 2043690 (1931-12-01), Arbuckle et al.
patent: 2154360 (1936-05-01), Scheel et al.
patent: 2184721 (1939-12-01), McIlvanie
patent: 2380447 (1937-11-01), Jungersen
patent: 3353897 (1965-11-01), Lemelson
patent: 3359671 (1967-12-01), Nier et al.
patent: 5299061 (1994-03-01), Wakatake
patent: 5351153 (1994-09-01), Wakatake
patent: 5363237 (1994-11-01), Wakatake

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