Display panel and display elements therefor

Details Display panel and display elements therefor Display panel and display elements therefor

1978-01-23

1979-12-04

Trafton, David L.

Communications: electrical

Audible indication

Percussion-type sound producer

40449, 3403785, 340764, G06K 1518

Patent

active

041774582

ABSTRACT:
A display panel which is provided with a display surface structure having a large number of display elements rotatably arranged in a vertical plane. The display elements are each formed with a plate-like (or four-cornered) block member having two (or four) display surfaces of different colors and one (or three) magnetic pieces. A selected one or ones of the display elements are rotated by the movement of a display control head or heads and by temporary energization of one (or three) magnets of each head to make a selected one of the two (or four) display surfaces of the selected display elements face forwardly, providing a display of a character, graph, pattern or the like on the display surface structure.

REFERENCES:
patent: 3267595 (1966-08-01), Levy et al.
patent: 3307170 (1967-02-01), Aoyama et al.
patent: 3518664 (1970-06-01), Taylor
patent: 3591939 (1971-07-01), Payne et al.
patent: 3754242 (1973-08-01), Ehrat

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