Matrix display assembly having multiple point lighting

Details Matrix display assembly having multiple point lighting Matrix display assembly having multiple point lighting

1989-08-28

1990-12-04

Brittain, James R.

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Alphanumeric device

40452, G09F 930

Patent

active

049743538

ABSTRACT:
This graphic character matrix display assembly has a support providing a nonreflecting background for a multiplicity of display units arranged for cooperatively displaying the character. Each of the display units comprises a flat display disk having opposite sides. An electromagnet rotates the disk between display position and reversed position. A light source projects a light beam at each disk when the disk is in the display position. The light beam also projects an outline of the disk by backlighting. A tab on each disk projects laterally in the plane of the disk to block the light beam when the disk is in reversed position. The light source may be a single incandescent lamp, plurality of lamps, a light pipe, light emitting diodes or a fiber optic light conduit.

REFERENCES:
patent: 1594703 (1926-08-01), Ballerini
patent: 4389804 (1983-06-01), Seibert et al.
patent: 4761905 (1988-08-01), Black
patent: 4769638 (1988-09-01), Woolfolk
patent: 4800381 (1989-01-01), Joseph et al.
patent: 4833806 (1989-05-01), Gars

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