Matrix display devices

Details Matrix display devices Matrix display devices

1980-08-11

1982-04-06

Pitts, Harold I.

Communications: electrical

Audible indication

Percussion-type sound producer

40446, 340366E, G09F 1100

Patent

active

043238890

ABSTRACT:
An improved matrix display device is disclosed which includes a display matrix assembly having electromechanical display elements in horizontal rows and vertical columns. The assembly has two support portions extending the width of the assembly, one portion being at the top and the other being at the bottom. A rail member extends along the width of the matrix and is arranged to guide a movable electromagnetic head device. A series of hooks attach the rail member to one of the support portions at locations in the portion having a defined distance relative to each row of the matrix, thereby ensuring that the electromagnetic head device moves in registration with the rows of the matrix. A degree of resilience is included in the display device so as to apply tension between the support portions thereby maintaining the matrix assembly substantially flat. It is therefore unnecessary for the assembly to be made completely rigid, e.g. by including a sheet of glass, and the assembly may be left relatively flexible.

REFERENCES:
patent: 3562938 (1971-02-01), Salam

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