Display controller

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

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Details

345192, 348563, G09G 540

Patent

active

055216137

ABSTRACT:
To minimize the capacity of a random access memory for storing display data of a display controller for displaying characters or the like on a television screen, the display data is divided into the data for characters or the like and the blank data free from characters with a discriminator, the data for characters or the like are stored in the random access memory every unit address, the number of non-characters shown by the blank data is counted by a counter, and the cumulative counted number is stored in the unit address of the random access memory. When the blank data is displayed, the counted number is read from the random access memory and non-character signals equivalent to the counted number are output to a display unit.

REFERENCES:
patent: 3911404 (1975-10-01), O'Neill, Jr.
patent: 4814756 (1989-03-01), Chauvel

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