Lighting display insensitive to extraneous light

Details Lighting display insensitive to extraneous light Lighting display insensitive to extraneous light

1978-09-01

1979-12-25

Lechert, Stephen J. Jr.

Illumination

Illuminated scale or dial

Internal light source

362 29, 362 32, 362293, 362311, G01D 1128

Patent

active

041808479

ABSTRACT:
For use with a lighted display which must be seen while energized in a high brightness environment, an arrangement which prevents extraneous light from entering the display for precluding ambiguity to a viewer as to whether or not the display is energized.

REFERENCES:
patent: 3120349 (1964-02-01), Howland
patent: 4128859 (1978-12-01), Rietmuller

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