Bi-stable display device

Details Bi-stable display device Bi-stable display device

1985-06-03

1986-12-09

Mancene, Gene

Card, picture, or sign exhibiting

Changing exhibitor

Alphanumeric device

40450, 40449, 40466, 40495, G09F 304

Patent

active

046271821

ABSTRACT:
A display device for use in constructing remote controlling billboards, bus destination signs, and the like has a two-sided display disc which is carried on a pivoted support. The display disc is rotated by the application of force from a piezoelectric crystal drive to a point on the support which is off of the axis of rotation of the support. The crystal drive responds to DC voltage of one polarity or the other to rotate the display disc to expose a dark side or a light side to the viewer.

REFERENCES:
patent: 755272 (1904-03-01), Burnham
patent: 1357457 (1920-11-01), Jorgensen
patent: 3054004 (1962-09-01), Lord
patent: 3072821 (1963-01-01), Yando
patent: 3504214 (1970-03-01), Lake
patent: 3928466 (1975-12-01), Arail et al.
patent: 4040193 (1977-08-01), Matsuda

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