Method and arrangement for optically representing information

Details Method and arrangement for optically representing information Method and arrangement for optically representing information

1993-11-17

1997-09-09

Green, Brian K.

Card, picture, or sign exhibiting

Illuminated sign

External light source

40448, 40624, 353 94, G09F 1300

Patent

active

056643535

ABSTRACT:
A method and an arrangement for optically representing information on a transparent projection surface using several projection modules and using through-light projection. The method and arrangement are both cost effective and ensures that an observer viewing even a large display of information is provided with a bright, contrast, homogeneous image. Each projection module is formed of a light source with a divergent beam radiating through a controllable light valve and a projection surface arranged behind it. The distance between the light valve and the projection surface is chosen in such a way that the image parts projected by adjacent modules border gaplessly to each other on the projection surface.

REFERENCES:
patent: 1065845 (1913-06-01), Sauvage
patent: 3020798 (1962-02-01), Chrisman
patent: 3198066 (1965-08-01), McGhee
patent: 3796484 (1974-03-01), Forster, Jr.
patent: 4116553 (1978-09-01), Cohen et al.
patent: 4330813 (1982-05-01), Deutsch
patent: 4954935 (1990-09-01), Hammond et al.
patent: 5011277 (1991-04-01), Ogino et al.

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