Matrix display with a fast cursor

Details Matrix display with a fast cursor Matrix display with a fast cursor

1984-10-01

1987-09-01

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

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

340801, 340803, 340709, G09F 935, G06F 3147

Patent

active

046912002

ABSTRACT:
A matrix-addressed display device having a cursor which is movable independently of the displayed information is disclosed. Two interrupt circuits are used to override or interrupt the refresh cycling of the displayed information and to relocate the cursor in the display device in response to a user input control such as a keyboard, joy stick or the like. One interrupt circuit comprises a pair of AND gates and an inverter, while the other interrupt circuit comprises a plurality of AND gate pairs with each pair having an inverter. The interrupt circuits enable the cursor to be moved to its new location prior to completion of the refresh cycling of the displayed information.

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