Character generator and video display device using the same
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United States of America Patent
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Oct 6, 1998
Grant Date -
N/A
app pub date -
Sep 15, 1992
filing date -
Sep 18, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Since the present invention includes a character pattern ROM 7a having no memory of upper and lower space data lines, there is an address determination circuit 28 and a selection circuit 29, and when a value of an address signal L is not within an actual memory range from '3' to '16', the address determination circuit outputs a false signal as a determination result upon which the selection circuit outputs character pattern lines each including only extra space data, so that it is possible to serve a similar function to that of a conventional one with a smaller memory capacity than that of the conventional one.
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