Deflection system
AssigneeRCA Corporation
InventorDavid Warren Luz
Life of this patent
Estimating the term…
Abstract
A horizontal deflection system is operable either from rectified and filtered alternating current line voltage or from a substantially lower voltage direct current voltage source. The need for a step-down transformer in the receiver power supply is eliminated by utilizing the horizontal output transformer to drop the rectified and filtered alternating current voltage when the receiver is operated in the alternating current line mode. The horizontal output transformer is utilized as a step-up inverter when the receiver is operated from the low voltage direct current source to produce a direct current voltage at a point on the horizontal output transformer substantially equal to the rectified and filtered alternating current line voltage.
Claims10
A deflection system selectively operable either from a first rectified and filtered alternating current line voltage supply or from a second substantially lower voltage direct current voltage supply, comprising:
- a deflection winding;
- a deflection current generator coupled to said deflection winding for generating in said deflection winding deflection current having trace and retrace intervals;
- switching means;
- and
- a transformer having at least a first winding coupled to said deflection current generator and to said first and second voltage supplies, said first and second supplies being coupled to said transformer at first and second points respectively for having excited at said first and second points respectively voltages substantially equal to said first supply voltage and to said second supply voltage during said trace interval, said second supply being coupled to said second point through said switching means having a first state for coupling said second supply to said second point during at least a portion of said trace interval and having a second state for decoupling said second supply from said second point during at least a portion of said retrace interval.
A deflection system selectively operable either from a first rectified and filtered alternating current line voltage supply or from a second substantially lower voltage direct current voltage supply, comprising:
- a deflection winding;
- deflection current switching means coupled to said deflection winding and having a terminal adapted for being coupled to a source of synchronizing signals for being synchronized by signals coupled therefrom for generating recurring deflection current cycles having trace and retrace intervals in said deflection winding;
- and
- a first winding coupled to said deflection current switching means, to said first supply and to said second supply, said first and second supplies being coupled to first and second points respectively of said first winding for having excited at said first and second points respectively voltages substantially equal to said first supply voltage and to said second supply voltage during said trace interval, said second supply being coupled to said first winding through unidirectional current conducting means for decoupling said second point from said second supply during at least a portion of said retrace interval and for coupling said second point to said second supply during at least a portion of said trace interval when said deflection system is operable from said second supply.
A deflection system selectively operable from a first rectified and filtered alternating current line voltage supply or from a second substantially lower voltage direct current supply, comprising:
- deflection switching means adapted for being coupled to a source of deflection synchronizing signals for switching in response thereto;
- first and second windings coupled to said deflection switching means, said first winding being coupled for having deflection currents comprising trace and retrace intervals induced therein in response to said switching and said second winding being coupled for having voltage variations induced thereacross in response to said switching and said flow of deflection current in said first winding, said first and second voltage supplies being selectively coupled to first and second points respectively of said second winding, said first and second points being chosen for inducing a direct current voltage substantially equal to said second voltage at said second point during said trace interval when said deflection system is operable from said first voltage supply and for inducing a direct current voltage substantially equal to said first voltage at said first point during said trace interval when said deflection system is operable from said second voltage supply;
- and
- second switching means coupled to said second supply and to said second point for switching to provide a current path from said second supply to said second point during at least a portion of said trace interval.
Dependencies are inferred from the claim text.