Character developing apparatus

Details Character developing apparatus Character developing apparatus

1995-05-22

1997-01-14

Boudreau, Leo

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345189, G06K 900

Patent

active

055944728

ABSTRACT:
A character developing apparatus for converting a character string in which outline characters and non-outline characters are mixed into character patterns, and developing the character patterns on a bitmap memory. The character developing apparatus includes a character storage memory for storing the character pattern, a character transfer circuit for selecting the character pattern corresponding to the character code from the character storage memory and transferring the selected character pattern to the bitmap memory. An outline memory stores outline data of the character and a character forming circuit executes outline character extraction processing of consecutively extracting the outline character requiring the character pattern from the character code and character forming processing of consecutively forming the character pattern of the outline character in the character storage memory by use of the outline data in the outline memory. The character forming circuit includes a plurality of pipeline-connected processing circuits each taking charge of divided processes containing the character extraction processing and character forming processing. A time of development on the bitmap memory is thereby reduced.

REFERENCES:
patent: 3999167 (1976-12-01), Ito et al.
patent: 4603330 (1986-07-01), Horne et al.
patent: 4630039 (1986-12-01), Shimada
patent: 4827254 (1989-05-01), Nishiyama
patent: 5276790 (1994-01-01), Lo et al.
patent: 5303334 (1994-04-01), Snyder et al.

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