Patent
Deflection circuit with a switched mode modulator circuit
TLDR
In this paper, a trace switch is coupled to a line deflection winding and a trace capacitance for applying a trace voltage to the deflection wound to generate line scanning current in the retrace winding.Abstract:
A trace switch, operated at a line rate, is coupled to a line deflection winding and a trace capacitance for applying a trace voltage to the deflection winding to generate line scanning current in the deflection winding. A deflection retrace capacitance is coupled to the deflection winding for forming a deflection retrace resonant circuit during the line retrace interval to generate a deflection retrace pulse voltage. A modulator inductance is coupled to the trace switch and to the line deflection winding. A modulator switch applies a line rate, switched mode, modulation voltage directly to the modulator inductance to control the amplitude of the current in the modulator inductance at the end of the line trace interval. A modulator retrace capacitance is coupled by the modulator switch to the modulator inductance during the line retrace interval for forming a modulator retrace resonant circuit. The switched mode modulation voltage is varied at a field rate to provide side pincushion correction to the line scanning current.read more
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Patent
Alignment of cathode ray tube displays using a video graphics controller
James R. Webb,Ron C. Simpson +1 more
TL;DR: In this article, a host computer (10) stores correction factor data and video image data in video graphics controller RAM (20) for aligning video images in CRT devices.
Patent
Alignment of cathode ray tube video displays using a host computer processor
James R. Webb,Ron C. Simpson +1 more
TL;DR: In this paper, a system for automatically aligning video images on a display device such as a cathode ray tube (CRT) was proposed, using previously generated correction factor data retrieved from a characterization module within the display device or from a convenient storage location.
Patent
Raster correction circuit
TL;DR: In this paper, a trace capacitance acts as a bypass capacitor around the inductance during retrace to prevent the induction from affecting the retrace voltage, and a current in the circuit branch, that is modulated in accordance with the modulated voltage, modulates the trace parabolic voltage across the trace capacitor in a manner to reduce inside pincushion distortion.
Patent
Protection arrangement of a deflection circuit
TL;DR: In this article, a flyback transformer primary winding is coupled to a junction terminal of the deflection switch and the resonance circuit to prevent an over-current condition when the current in the second switch exceeds a predetermined first level.
Patent
Raster distortion corrected deflection circuit
TL;DR: In this paper, a flyback transformer primary winding (W₁) is coupled at a junction terminal (collector of Q1) of the deflection switch (Q1) and the retrace resonant circuit (100).
References
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Patent
East-west correction circuit
TL;DR: In this article, a flyback transformer and a retrace resonant circuit are mutually coupled by a relatively small capacitor during the retrace interval so as to reduce transient distortions that may be caused by a sudden high beam current change.
Patent
Side pincushion modulator circuit with overstress protection
TL;DR: In this paper, a side pincushion corrected deflection circuit for a television receiver includes a deflection winding, a trace capacitor and a first switch for generating scanning current in the deflection wound.
Patent
Line sawtooth deflection current generator
TL;DR: A line sawtooth deflection current generator with modulating means for the purpose of correcting the amplitude variations of the current produced, the modulating mean including a stage operating in the switching mode is described in this paper.
Patent
Circuit for correcting east-west pincushion distortions
TL;DR: In this article, a circuit is provided for the correction of east-west pincushion distortions on the picture screen of a television receiver, which includes a diode modulator, which is controlled via a coupling coil from a control stage switched by a horizontal scanning frequency, frame frequency modulated rectangular signal as well as an electronic switch connected to the coupling coil for returning of stored energy to an electrical energy supply source.