Character display system

Details Character display system Character display system

1988-10-19

1991-07-02

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

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

340750, 340799, 340814, G09G 102

Patent

active

050292897

ABSTRACT:
A synchronized timing controller has an access controller for controlling a central processing unit and a display controller of a display device to alternately access a refresh memory in a character display system. The timing controller has a clock synchronizer for recovering synchronization of both the clock for the central processing unit and the clock for the display controller automatically when a synchronizing error occurs between the clocks. When an error occurs, the clock synchronizer detects the error and inhibits the display controller from accessing the refresh memory but allows the central processing unit to access the memory by controlling the access controller during the time for recovering synchronization.

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