Card – picture – or sign exhibiting – Changing exhibitor – Alphanumeric device
Patent
1997-10-27
1999-05-11
Green, Brian K.
Card, picture, or sign exhibiting
Changing exhibitor
Alphanumeric device
40452, 34081562, 345 59, 345111, G09F9/00
Patent
active
059014830
ABSTRACT:
A display element includes a disk which rotates through 160.degree.-180.degree. to display a bright or a dark side in a viewing direction in ON and OFF positions respectively A constantly on LED is arranged to illuminate the disk in ON position for viewing in a first arc including the viewing direction. The disk masks the LED to viewers in the OFF position of the disk. In addition to light from the illuminated disks, the components may be arranged so that viewers over a second arc may view the LED directly when the disk is in ON position. The elements may be arranged in arrays to form a changeable sign. Thus the array may be made up of single elements, of columns of such elements or of a combination of elements and columns.
REFERENCES:
patent: 3942274 (1976-03-01), Winrow
patent: 4163332 (1979-08-01), Salam
patent: 4833806 (1989-05-01), Gars
patent: 4914427 (1990-04-01), Trunk
patent: 5021773 (1991-06-01), Browne
patent: 5022171 (1991-06-01), Norfolk et al.
patent: 5050325 (1991-09-01), Browne
Green Brian K.
Mark IV Industries Limited
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