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AssigneeNEC Corporation
InventorsTakafumi Esaki, Yoshiyuki Uto, Hiroshi Furukawa, Yasuhiro Fukuda
Estimating the term…
There is disclosed a phase-locked loop (PLL) circuit for use in an improved deflection correction circuit for a larger and flat display device. The PLL circuit has a phase comparator circuit, a filter, and a voltage-controlled oscillator (VCO) connected in series in this order. The output signal from the VCO is fed back to the phase comparator circuit. The PLL circuit further includes a period-detecting circuit for detecting the period of an externally applied signal and a frequency divider circuit. This frequency divider circuit divides the frequency of the output signal from the VCO according to the period detected by the period-detecting circuit and feeds the resulting signal back to the VCO.
A deflection correction circuit having a phase-locked loop circuit for feeding an output signal from a voltage-controlled oscillator back to a preceding circuit stage, said deflection correction circuit producing a distortion-correcting signal for correcting distortions on a viewing screen of a display device and a horizontal drive signal for controlling scan across the viewing screen in response to an externally applied horizontal synchronizing signal, said deflection correction circuit comprising:
A deflection correction circuit having a phase-locked loop circuit for feeding an output signal from a voltage-controlled oscillator back to a preceding circuit stage, said deflection correction circuit producing a distortion-correcting signal for correcting distortions on a viewing screen of a display device and a horizontal drive signal for controlling scan across the viewing screen in response to an externally applied horizontal synchronizing signal, said deflection correction circuit comprising:
Dependencies are inferred from the claim text.