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AssigneeThomson Consumer Electronics, Inc.
InventorsNancy D. Boettner, John B. George, Ronald E. Fernsler
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A deflection waveform correction signal generator comprises a multiplying circuit for generating a pincushion correction signal. A horizontal frequency ramp is generated by a clipped retrace pulse. The ramp generator has an output coupled to an integrating circuit for generating a parabolic shaped signal. The ramp generator and ramp integrator are reset at a horizontal rate by reset pulses of differing duration. The different duration of reset pulses results in the parabolic signal having regions of non-parabolic shape. The parabolic shaped signal is coupled to an input of the multiplying circuit. A control circuit is coupled to the parabolic shaped signal for maintaining a peak amplitude thereof by controllable coupling to the ramp generator. A control loop is coupled to the integrator for controlling an integrator input bias current to generate the parabolic shaped signal at a predetermined time interval.
A deflection waveform corrector for a video display, said corrector comprising:
A deflection waveform corrector for a video display, said corrector comprising:
An apparatus for correction of raster distortion in a video display, said apparatus comprising:
Dependencies are inferred from the claim text.