Constant writing rate digital stroke character generator having

Details Constant writing rate digital stroke character generator having Constant writing rate digital stroke character generator having

1974-08-01

1976-04-20

Curtis, Marshall M.

Communications: electrical

Systems

Portable self-contained

235198, G06F 314

Patent

active

039522970

ABSTRACT:
A digital character generator with minimal storage requirements for use in random access display systems. Each character or symbol is made up of patterns of straight line segments called macro-strokes. Each macro-stroke in turn is made up of a predetermined number of connected portions or micro-strokes lying in a straight line. Each micro-stroke is of substantially the same length independent of the number of micro-strokes in a macro-stroke and of the directional orientation of the macrostroke. To store a character or symbol each macro-stroke is divided into its micro-strokes and the micro-strokes resolved into X and Y components. The X and Y components are stored along with the number of micro-strokes in the particular macro-stroke. Along with this information is stored the address and memory of the next macro-stroke within the character or symbol. The X and Y components of the micro-strokes are continuously accumulated until the end of the macro-stroke is reached as determined by the number of micro-strokes within the macro-stroke. The memory is then sequenced to the next address to begin the generation of the next macro-stroke.

REFERENCES:
patent: 3510865 (1970-05-01), Callahan et al.
patent: 3587083 (1971-06-01), Tubinis
patent: 3597757 (1971-08-01), Vincent-Carrefour et al.
patent: 3696391 (1972-10-01), Peronneau
patent: 3742484 (1973-06-01), Rosenthal
patent: 3755805 (1973-08-01), Dandrel et al.
patent: 3775760 (1973-11-01), Strathman
patent: 3789200 (1974-01-01), Childress et al.

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