Luminous display installation with an increased contrast effect

Details Luminous display installation with an increased contrast effect Luminous display installation with an increased contrast effect

1982-02-08

1984-01-10

Lechert, Jr., Stephen J.

Illumination

Light source and modifier

Louvered or grid type modifier

362290, 362297, 362304, 362305, 362308, 362309, 362327, 362328, 363329, 362335, 362342, 362343, 362346, 362347, 362354, 362359, 362360, 362361, F21V 700

Patent

active

044256086

ABSTRACT:
An improved optical system for the light point on an illuminated signal or display device having one or more light points. The system comprises one or more light deflectors optically coupled with the light source of the light point and focussing the light passing through the effective aperture of the deflectors towards a focal point or line, respectively, and one or more light shields arranged in the light path and provided with an aperture in the focal point or line whereas a plurality of the deflectors with the corresponding light shields may be arranged in the rows and columns of a display board. The mantle of the light shield frames a hollow in a manner that its mouth is facing the light deflectors and the mantle is under a bevel narrowing towards the aperture of the light shield and the mantle is arranged parallel to and encircling rays departing from the periphery of the effective aperture of the light deflectors and converging into the focal point or line.

REFERENCES:
patent: 3325238 (1967-06-01), Geier
patent: 3768900 (1973-10-01), McLintic

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