Electron beam deflection circuit

Claim 2

A deflection circuit comprising: a. an output circuit including a pair of transistors connected in a single-ended push-pull amplifier array and a deflection coil connected to the output end of said pair of transistors, said deflection coil being supplied with a deflection current in trace and retrace periods; b. a voltage terminal provided to be connected to a voltage source; c. switch means connected to said voltage terminal; d. circuit means having charge storing means and connected between one end of said output circuit and said switch, said circuit means supplying a first voltage to said output circuit and simultaneously charging said charge storing means during the retrace period and supplying a second voltage lower than said first voltage to said output circuit by the discharging of said charge storing means during the trace period; and e. control means for controlling the conductivity of said switch means in response to the turning of the period between the trace and retrace periods.

Claim 3

A deflection circuit according to claim 1, wherein said circuit means comprises a voltage supplying path for supplying the voltage of said voltage source to said output circuit, plural capacitors, first connecting means for making a series connection of said plural capacitors connected to said voltage supplying path to charge the series connnected plural capacitors by said voltage source during the retrace period and second connecting means for connecting each of said plural capacitors to said one end of said output circuit with respective paths parallel to each other to make each of said capacitors discharge toward said output circuit during the trace period.

Claim 4

A deflection circuit according to claim 2, wherein said first connecting means includes at least one unidirectional element connected between two of said plural capacitors, and said second connecting means includes plural additional unidirectional elements each connected to each of said plural capacitors to make plural series paths connected to said one end of said output circuit in parallel to each other.

Claim 5

A deflection circuit according to claim 3, wherein said circuit means further comprises an additional capacitor connected between said switch and said one end of said output circuit, an impedance element connected to a junction between one end of said additional capacitor and said switch, and a further additional unidirectional element provided in said voltage supplying path.

Claim 6

A deflection circuit according to claim 1, wherein said control means comprises means for supplying a control signal which varies in accordance with the trace and retrace periods to said switch means so as to make said switch means nonconductive during the trace period and conductive during the retrace period.

Claim 7

A deflection circuit according to claim 5, wherein said control means further comprises means for producing said control signal in response to a pulse obtained at the output end of said couple of transistors.

Claim 8

A deflection circuit comprising: a. an output circuit including a pair of transistors connected in a single-ended push-pull amplifier array and a deflection coil connected to the output end of said pair of transistors, said deflection coil being supplied with a deflection current in trace and retrace periods; b. a voltage terminAl provided to be connected to a voltage source; c. switch means with one end connected to said voltage terminal; d. circuit means comprising a connecting path connecting the other end of said switch to one end of said output circuit, a series connection of a first capacitor, a first diode and a second capacitor, one end of said series connection being connected to said connecting path, a second diode connected across the series connection of said first capacitor and said first diode and a third diode connected across the series connection of said first diode and said second capacitor; and e. control means for controlling the conductivity of said switch means in response to the turning of the period between the trace and retrace periods.

Claim 9

A deflection circuit comprising: a. an output circuit including a pair of transistors connected in a single-ended push-pull amplifier array and a deflection coil connected to the output end of said pair of transistors, said deflection coil being supplied with a deflection current in trace and retrace periods; b. a voltage terminAl provided to be connected to a voltage source; c. switch means with one end connected to said voltage terminal; d. circuit means comprising a connecting path connecting the other end of said switch to one end of said output circuit, a series connection of a first capacitor, a first diode and a second capacitor, one end of said series connection being connected to said connecting path, a second diode connected across the series connection of said first capacitor and said first diode and a third diode connected across the series connection of said first diode and said second capacitor; and e. control means for controlling the conductivity of said switch means in response to the turning of the period between the trace and retrace periods.

Claim 10

A deflection circuit according to claim 7, wherein said switch means has a control terminal and said control means is connected between said output end of said pair of transistors and said control terminal.