Regulated deflection circuit with regulator switch controlled by deflection current

Claim 2

A deflection circuit with switched regulator adapted for operation from a source of unregulated direct voltage, comprising: a deflection winding; input inductance means serially coupled between a first terminal of said source and a first end of said deflection winding to form a first series circuit; capacitance means coupled between a second end of said deflection winding and a second terminal of said source, the voltage across said first series circuit being regulated by the difference between said unregulated voltage and the voltage across said capacitance means; first controllable switch means coupled with said deflection winding and operated at the deflection rate for establishing currents in said deflection winding during periodic trace and retrace intervals; second controllable switch means serially coupled with said first controllable switch means at a first junction for providing a path for the flow of current in said first switch means; second inductance means coupled between said first junction and said second terminal of said source for providing a path for the flow of current in said capacitance means; and control means for controlling the deflection and for controlling the conduction period of said first and second switches in a manner to control the current flow in said capacitance means through said second inductance means and thereby maintain said regulated voltage substantially constant.

Claim 3

A circuit according to claim 1 further comprising damper means coupled across said deflection winding; wherein said second controllable switch means comprises rectifier means controlled by the voltage thereacross and coupled to said second end of said deflection winding; wherein said control means periodically renders said first switch means nonconductive to establish said retrace interval, and periodically renders said first switch means conductive at a time during the first half of said trace interval to control the flow of current in said second inductance means and thereby control the flow of current in said capacitance means to maintain said regulated voltage substantially constant.

Claim 4

A circuit according to claim 2 wherein said capacitance means is coupled between said second end of said deflection winding and said second terminal of said source, whereby the voltage across said first series circuit is the difference between said unregulated voltage and the voltage across said capacitance means.

Claim 5

A circuit according to claim 1 wherein: said second controllable switch means comprises gated bidirectional switch means; and said control means periodically operates said first controllable switch means to establish said trace and retrace intervals, and gates said gated bidirectional switch means into conduction during the interval extending from the beginning of each retrace interval to the center of the next succeeding trace interval to control the flow of current in said second inductance means and thereby control the current flow through said capacitance means to maintain said regulated voltage substantially constant.

Claim 6

A circuit according to claim 4 wherein said capacitance means is coupled between said second end of said deflection winding and said second terminal of said source whereby the voltage across said first series circuit is the difference between said unregulated voltage and the voltage across said capacitance means.

Claim 7

A circuit according to claim 4 wherein said gated bidirectional switch means comprises an SCR antiparalleled with a rectifier.

Claim 8

A circuit according to claims 2, 3 or 6 further comprising energy recovery means coupled with said source and with said second inductance means for returning to said source, energy stored by said second inductance means during discharge of said capacitance means.

Claim 9

A circuit according to claim 7 wherein said energy recovery means comprises: third inductance means transformer coupled with said second inductance means, a first end of said third inductance means being coupled to a reference potential; and second rectifier means coupling the second end of said third inductance means with said first terminal of said source, said second rectifier means being poled to allow current flow of such a polarity as to return energy to said source.

Claim 10

A circuit according to claim 7 wherein said energy recovery means comprises: second capacitance means; second rectifier means serially coupled with said second capacitance means at a second junction, the serial combination of said second capacitance means and said second rectifier means being coupled between said second terminal of said source and said first junction for providing an intermediate energy storage in said second capacitance means; and third rectifier means coupled between said first terminal of said source and said second junction, said third rectifier means being poled for current flow of such a polarity as to return energy to said source.

Claim 11

A horizontal deflection circuit arrangement adapted to be operated from a source of unregulated direct voltage, comprising: a deflection winding; linearity capacitance means serially coupled with said deflection winding to form a first series circuit; damper rectifier means coupled across said first series circuit to form a first parallel circuit; input inductance means having one end coupled to a first end of said first parallel circuit and the other end coupled to a first terminal of said source of unregulated voltage. first controlled unidirectional switch means operated at the deflection rate for defining periodic trace and retrace intervals; second controlled bidirectional switch means serially coupled with said first switch means at a junction to form a second series circuit, said second series circuit being coupled in parallel with said first parallel circuit; second capacitance means having one end coupled with a second end of said first parallel circuit and having the other end coupled to a second terminal of said source of unregulated voltage for establishing a stabilized direct operating voltage for the deflection circuit equal to the difference between said unregulated direct voltage and the voltage across said second capacitance means; second inductance means having one end coupled to said junction and the other end coupled to said second terminal of said source of unregulated voltage for providing a current path for discharging said second capacitance means; and energy recovery means coupled with said second inductance means and with said source of unregulated voltage for transferring the energy stored in said second inductance means to said source of unregulated voltage.

Claim 12

A horizontal deflection circuit arrangement adapted to be operated from a source of unregulated direct voltage, comprising: a deflection winding; linearity capacitance means serially coupled with said deflection winding to form a first series circuit; damper rectifier means coupled across said first series circuit to form a first parallel circuit; input inductance means having one end coupled to a first end of said first parallel circuit and the other end coupled to a first terminal of said source of unregulated voltage. first controlled unidirectional switch means operated at the deflection rate for defining periodic trace and retrace intervals; second controlled bidirectional switch means serially coupled with said first switch means at a junction to form a second series circuit, said second series circuit being coupled in parallel with said first parallel circuit; second capacitance means having one end coupled with a second end of said first parallel circuit and having the other end coupled to a second terminal of said source of unregulated voltage for establishing a stabilized direct operating voltage for the deflection circuit equal to the difference between said unregulated direct voltage and the voltage across said second capacitance means; second inductance means having one end coupled to said junction and the other end coupled to said second terminal of said source of unregulated voltage for providing a current path for discharging said second capacitance means; and energy recovery means coupled with said second inductance means and with said source of unregulated voltage for transferring the energy stored in said second inductance means to said source of unregulated voltage.

Claim 13

A self-regulating deflection circuit adapted to be energized by a source of unregulated direct voltage, comprising: first and second controllable switch means, having first and second controllable current paths coupled in series at a first junction to form a first series combination, and having respective first and second control electrodes; a deflection winding; linearity capacitance means for coupling said deflection winding across said first series combination, to form a first parallel combination, said linearity capacitance means being serially coupled with said deflection winding; first capacitance means coupled in series with said source of unregulated direct voltage and forming a second junction point therebetween, the end of said unregulated voltage source and of said first capacitance means remote from said second junction point forming terminals of a second source of direct voltage; first inductance means coupling said first parallel combination across the terminals of said second source of direct voltage; second inductance means coupling said first junction point with said second junction point; and control means coupled with said first and second control electrodes for operating said first and second switch means for promoting the flow of deflection current at the deflection rate and for recurrently discharging said first capacitance means to thereby regulate the voltage of said second source.

Claim 14

A self-regulating deflection circuit adapted to be energized by a source of unregulated direct voltage, comprising: first and second controllable switch means, having first and second controllable current paths coupled in series at a first junction to form a first series combination, and having respective first and second control electrodes; a deflection winding; linearity capacitance means for coupling said deflection winding across said first series combination, to form a first parallel combination, said linearity capacitance means being serially coupled with said deflection winding; first capacitance means coupled in series with said source of unregulated direct voltage and forming a second junction point therebetween, the end of said unregulated voltage source and of said first capacitance means remote from said second junction point forming terminals of a second source of direct voltage; first inductance means coupling said first parallel combination across the terminals of said second source of direct voltage; second inductance means coupling said first junction point with said second junction point; and control means coupled with said first and second control electrodes for operating said first and second switch means for promoting the flow of deflection current at the deflection rate and for recurrently discharging said first capacitance means to thereby regulate the voltage of said second source.

Claim 15

A regulated deflection circuit, comprising: a source of unregulated voltage; a deflection winding; a first capacitance coupled to said deflection winding; a second capacitance coupled to said first capacitance and said source of unregulated voltage; means for charging said first and second capacitances from said source of unregulated voltage; inductance means; switching means coupled to said deflection winding for applying a first voltage to said deflection winding during a trace interval for generating a deflection current in said deflection winding during said trace interval, said switching means coupling said inductance means to said second capacitance for providing a path for the flow of current in said second capacitance through said inductance means for controlling the voltage across said second capacitance, said first voltage being established as a value representative of the voltage difference between said unregulated voltage and the voltage maintained across said second capacitance; and means responsive to a change in a voltage level within said deflection circuit for varying the current flow in said inductance means for varying the voltage across said second capacitance for regulating said voltage level.

Claim 16

A regulated deflection circuit, comprising: a source of unregulated voltage; a deflection winding; a first capacitance coupled to said deflection winding; a second capacitance coupled to said first capacitance and said source of unregulated voltage; means for charging said first and second capacitances from said source of unregulated voltage; inductance means; switching means coupled to said deflection winding for applying a first voltage to said deflection winding during a trace interval for generating a deflection current in said deflection winding during said trace interval, said switching means coupling said inductance means to said second capacitance for providing a path for the flow of current in said second capacitance through said inductance means for controlling the voltage across said second capacitance, said first voltage being established as a value representative of the voltage difference between said unregulated voltage and the voltage maintained across said second capacitance; and means responsive to a change in a voltage level within said deflection circuit for varying the current flow in said inductance means for varying the voltage across said second capacitance for regulating said voltage level.