Device for controlling a color video display
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United States of America Patent
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Oct 22, 1991
Grant Date -
N/A
app pub date -
Dec 1, 1988
filing date -
Dec 4, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for controlling a color video display which includes ladder resistor units having a plurality of taps; a clock signal generating unit for generating four-phase clock signals having the same frequency as the frequency of a sub-carrier from a clock signal having a frequency which is four times the frequency of the sub-carrier, and a color signal generating unit for receiving data corresponding to colors to be displayed and for generating color signals, by successively selecting taps of the ladder resistor units corresponding to the colors to be displayed, in synchronization with the four-phase clock signals. The generation of color signals having a precise phase angle relationships are ensured by this device.
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