Edge-lit multiple image display device

Details Edge-lit multiple image display device Edge-lit multiple image display device

1989-07-11

1990-08-21

Mancene, Gene

Card, picture, or sign exhibiting

Illuminated sign

Edge illuminated

G09F 1318

Patent

active

049494899

ABSTRACT:
There is disclosed an edge-lit multiple image display device. The device utilizes a plurality of internal-reflecting-light sheets which are provided in a stacked array. Images are formed on the surfaces of the sheets with a coating of a material that changes the density on the internally reflecting surface of its respective sheet. A light source is provided to illuminate the edges of the stacked array of sheets, with a light shield that can be moved to selectively direct the light to one edge at a time of the edges of the sheets in the stack. As the light shield is moved to selectively and alternatingly illuminate the edges of selected sheets in the stacked array, the images displayed on each of the edge-lit plates becomes illuminated, appearing and then disappearing as the light source is applied and then removed from the edge of its respective plate. This can be used to provide an animated display.

REFERENCES:
patent: 2347665 (1944-05-01), Christensen et al.
patent: 2531937 (1950-11-01), Gratiot
patent: 3399476 (1968-09-01), Davis
patent: 4386476 (1983-06-01), Schulman
patent: 4697365 (1987-10-01), Moosbrugger et al.

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