Electronic display apparatus

Details Electronic display apparatus Electronic display apparatus

1980-04-11

1981-11-03

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

273 1E, 315211, 358241, 362811, 340805, 340782, G08B 536

Patent

active

042988683

ABSTRACT:
An apparatus is provided to produce an optical illusion of variable geometric patterns. The apparatus may be used as an electronic toy, display or kinetic art mural, as well as a demonstration aid in geometry, physics or physiology. An array of light emitting diodes mounted on a rotating disk or carrier is selectively activated to control the geometric patterns formed.

REFERENCES:
patent: 704513 (1902-07-01), Campbell
patent: 1550036 (1925-08-01), McCann
patent: 1800054 (1931-04-01), Craig
patent: 1904901 (1933-04-01), Lawrence
patent: 1940500 (1933-12-01), Lawrence
patent: 3154636 (1964-10-01), Schwertz
patent: 3272506 (1966-09-01), Lescher
patent: 3737647 (1973-06-01), Gomi
patent: 3958235 (1976-05-01), Duffy
patent: 4097917 (1978-06-01), McCaslin
patent: 4160973 (1979-07-01), Berlin

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