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(11) | EP 0 073 916 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Circuit for individually controlling the color of the font and background of a character displayed on a color tv receiver or monitor |
| (57) O An 8-bit character byte is fetched from a random access memory (30) and applied
to a character generator (28). An associated 8-bit attribute bit is also fetched from
the random access memory (30) and applied to the inputs of a multiplexer (32). Four
of the attribute bits designate the color of the font of a character to be displayed
on a TV set (14). The remaining four attribute bits designate the background color
of the displayed character. The eight attribute bits are selectively gated to the
outputs of the multiplexer (32) under the control of character serial dots from the
parallel-to-serial converter (34) as red (R), green (G) and blue (B) digital color
signals which are applied to a composite video signal generator (38) which produces
a composite video color signal. The colors of the font and background of each individual
character displayed on the TV set (14) thus are Independently controlled by the font
and background color bits. |