Luminous display device

Details Luminous display device Luminous display device

1975-03-10

1976-12-07

Corbin, John K.

350150, G02F 101

Patent

active

039959406

ABSTRACT:
The display device comprises a light source, a uniform layer C.sub.a of semi-reflecting material of small thickness and illuminated by the light source, a uniform layer C.sub.b of transparent material having a refractive index n and a thickness e deposited on the layer C.sub.a, the optical thickness of the layer C.sub.b being constant and equal to ne as measured at right angles to the surface, a reflecting layer C.sub.c deposited on at least part of the layer C.sub.b in order to form the patterns which are intended to be displayed.

REFERENCES:
patent: 3578843 (1971-05-01), Castellion
patent: 3844636 (1974-10-01), Maricle et al.
patent: 3854794 (1974-12-01), Van Dam et al.

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