Patent ID: 6087788
Filing Date: 2000-07-11
Classification: G09G,H03L,H04N

Abstract:
A horizontal scanning pulse control circuit comprising:a reference clock generation circuit for generating a reference clock signal in synchronization with a horizontal synchronization signal;first and second horizontal position reference pulse generation circuits, connected to said reference clock generation circuit, for generating first and second horizontal position reference pulse signals, respectively, whose phases are different with reference to said horizontal synchronization signal and corresponding pulses of said reference clock signal;first and second saw-tooth wave generation circuits, connected to said first and second horizontal position reference pulse generation circuits, respectively, for generating first and second saw-tooth wave signals in response to said first and second horizontal position reference signals, respectively;first and second comparators, connected to said first and second saw-tooth wave generation circuits, respectively, for comparing said first and second saw-tooth wave signals with a horizontal position selection voltage to generate first and second comparison signals, respectively; andan RS-type flip-flop, connected to said first and second comparators, said RS-type flip-flop being set and reset by said first and second comparison signals, respectively,an output signal of said RS-type flip-flop being used as a horizontal scanning pulse signal.