PHASE CONTROLLER OF HORIZONTAL DRIVE PULSE AND METHOD OF THE SAME

A PHASE CONTROLLER OF A HORIZONTAL DRIVE PULSE (380) FED INTO A HORIZONTAL DEFLECTION CIRCUIT (130) SUPPLYING A HORIZONTAL DEFLECTION PULSE (340), AND A CONTROL METHOD OF THE SAME ARE DISCLOSED. A FREQUENCY DISCRIMINATOR (10) IDENTIFIES A FORMAT OF VIDEO-INPUT-SIGNAL BY DETECTING A FREQUENCY OF THE...

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Hauptverfasser:	NOBUO TAKETANI, RYUICHI SHIBUTANI, HISAO MORITA, HIROSHI MORIBE, HIROSHI ANDO
Format:	Patent
Sprache:	eng
Schlagworte:	AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY PICTORIAL COMMUNICATION, e.g. TELEVISION
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Zusammenfassung:	A PHASE CONTROLLER OF A HORIZONTAL DRIVE PULSE (380) FED INTO A HORIZONTAL DEFLECTION CIRCUIT (130) SUPPLYING A HORIZONTAL DEFLECTION PULSE (340), AND A CONTROL METHOD OF THE SAME ARE DISCLOSED. A FREQUENCY DISCRIMINATOR (10) IDENTIFIES A FORMAT OF VIDEO-INPUT-SIGNAL BY DETECTING A FREQUENCY OF THE HORIZONTAL SYNC SIGNAL (300). A REFERENCE PHASE GENERATOR (20) GENERATES A REFERENCE PHASE SIGNAL (310) BASED ON THE OUTPUT (390) FROM THE FREQUENCY DISCRIMINATOR (10). A SAWTOOTH WAVEFORM GENERATOR (210) GENERATES A SAWTOOTH WAVEFORM SIGNAL (330) RESPONSIVE TO THE OUTPUT (390) FROM THE FREQUENCY DISCRIMINATOR (10). A PHASE DIFFERENCE VOLTAGE DETECTOR (220) OUTPUTS A PHASE DIFFERENCE VOLTAGE (365) RESPONSIVE TO THE PHASE DIFFERENCE BETWEEN THE REFERENCE PHASE SIGNAL AND THE HORIZONTAL DEFLECTION PULSE. A PHASE CONTROL SIGNAL GENERATOR (230) GENERATES A PHASE CONTROL SIGNAL (370) USING THE PHASE DIFFERENCE VOLTAGE AND THE SAWTOOTH WAVEFORM SIGNAL. HORIZONTAL DRIVE PULSE GENERATOR (200) OUTPUTS A HORIZONTAL DRIVE PULSE (380) HAVING A PHASE RESPONSIVE TO THE PHASE CONTROL SIGNAL (370). THE PHASE CONTROLLER AND THE PHASE CONTROL METHOD AS STRUCTURED ABOVE REALIZE A STABLE PHASE CONTROL OF THE HORIZONTAL DRIVE PULSES IN VIDEO DISPLAY DEVICES.