Procedure for addressing of visual display devices

Details Procedure for addressing of visual display devices Procedure for addressing of visual display devices

1977-02-16

1979-02-27

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

350333, G09F 932

Patent

active

041421825

ABSTRACT:
A procedure for the addressing of visual display devices comprising stylized alphanumeric characters which consist of similarly shaped front and rear display elements, whereby in the case of simultaneous selection of a front and the corresponding rear display elements, an optical activation of these elements results such that by coincident selection of the front and rear display elements of several pairs of elements having a specific geometrical configuration a corresponding alphanumeric character becomes visible, whereby further the number of address leads and drivers is reduced by interconnecting the display elements as a matrix and by time-sharing the address leads through multiplexed operation in such a way that the address leads in one matrix dimension are used to select the front elements of the display and the address lines in the second matrix dimension are used to select the rear elements of the display and the address leads in one of these matrix dimensions extend over more than one character.

REFERENCES:
patent: 3614771 (1971-10-01), Band et al.
patent: 3760403 (1973-09-01), Kippenhan
patent: 3781863 (1973-12-01), Fujita
patent: 3831166 (1974-08-01), De Nardo
patent: 4034368 (1977-07-01), Shimomura

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