High-voltage circuit for post focusing type color picture tube

Claim 2

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than 7; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having an output terminal at the final stage thereof and another output terminal at an intermediate stage thereof, said voltage-multiplying rectifier circuit further including a plurality of rectifier elements and a plurality of capacitor elements; a voltage stabilizing element and a resistor both connected in series between an output terminal of the m-th stage and another output terminal of a higher middle stage of said multiple-stage voltage-multiplying rectifier circuit; and means for collecting a third high voltage from the junction point of said voltage stabilizing element and said resistor.

Claim 3

A high voltage circuit according to claim 1, further comprising a capacitor element inserted between said junction point and the m-th or lower middle stage of said multiple-stage voltage-multiplying rectifier circuit.

Claim 4

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having an output terminal at the final stage thereof and another output terminal at an intermediate stage thereof, said voltage-multiplying rectifier circuit further including a plurality of rectifier elements and a pluality of capacitor elements; means for producing fly-back pulses from said fly-back transformer; a rectifier circuit for rectifying said fly-back pulses obtained by said means; and means for adding the output voltage of said rectifier circuit to a high voltage obtained from an output terminal of an intermediate stage of said multiple-stage voltage-multiplying rectifier circuit and producing an output which is the result of said adding operation.

Claim 5

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having an output terminal at the final stage thereof and another output terminal at an intermediate stage thereof, said voltage-multiplying rectifier circuit further including a plurality of rectifier elements and a pluality of capacitor elements; means for producing fly-back pulses from said fly-back transformer; a rectifier circuit for rectifying said fly-back pulses obtained by said means; and means for adding the output voltage of said rectifier circuit to a high voltage obtained from an output terminal of an intermediate stage of said multiple-stage voltage-multiplying rectifier circuit and producing an output which is the result of said adding operation.

Claim 6

A high voltage circuit according to claim 3, in which said means for obtaining said fly-back pulses comprises a tertiary winding provided in said fly-back transformer.

Claim 7

In a high voltage circuit for generating a plurality of high voltages of different values for the color picture tube of post focusing type, comprising: A fly-back transformer including a primary winding to which horizontal output pulses are supplied and a secondary winding for producing thereacross high voltage fly-back pulses; multiple stage multiplying voltage rectifier means connected to a terminal of the secondary winding of said fly-back transformer and made up of voltage rectifier circuits formed into n stages for producing high DC voltages; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and (1<m<n); and a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and (1<l≲n), the improvement comprising a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of the fly-back pulses, said odd number being not less than seven.

Claim 8

In a high voltage circuit for generating a plurality of high voltages of different values for the color picture tube of post focusing type, comprising: A fly-back transformer including a primary winding to which horizontal output pulses are supplied and a secondary winding for producing thereacross high voltage fly-back pulses; multiple stage multiplying voltage rectifier means connected to a terminal of the secondary winding of said fly-back transformer and made up of voltage rectifier circuits formed into n stages for producing high DC voltages; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and (1<m<n); and a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and (1<l≲n), the improvement comprising a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of the fly-back pulses, said odd number being not less than seven.

Claim 9

A high voltage circuit according to claim 5, wherein said first voltage stabilizing element is a Zener diode.

Claim 10

A high voltage circuit according to claim 5, wherein said first voltage stabilizing element is a resistor having a high resistance.

Claim 11

A high voltage circuit according to claim 5, further comprising a power supply means connected between a point of a reference potential and another terminal of the secondary winding of said fly-back transformer, said power supply means generating a DC voltage.

Claim 12

A high voltage circuit according to claim 5, wherein said odd number is not less than nine.

Claim 13

In a high voltage circuit for generating a plurality of high voltages of different values for the color picture tube of post focusing type, comprising: a fly-back transformer including a primary winding to which horizontal output pulses are supplied and a secondary winding for producing thereacross high voltage fly-back pulses; multiple stage multiplying voltage rectifier means connected to a terminal of the secondary winding of said fly-back transformer and made up of voltage rectifier circuits formed into n stages for producing high DC voltages; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and (1<m<n);

Claim 14

In a high voltage circuit for generating a plurality of high voltages of different values for the color picture tube of post focusing type, comprising: a fly-back transformer including a primary winding to which horizontal output pulses are supplied and a secondary winding for producing thereacross high voltage fly-back pulses; multiple stage multiplying voltage rectifier means connected to a terminal of the secondary winding of said fly-back transformer and made up of voltage rectifier circuits formed into n stages for producing high DC voltages; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and (1<m<n);

Claim 15

a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and (1<l≲n), the improvement comprising a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of the fly-back pulses, said odd number being not less than seven; and a second resonance circuit connected to at least one of the primary winding and the secondary winding of said fly-back transformer and adapted to be tuned to a higher harmonic of a frequency which is an integral multiple of the fundamental frequency of the fly-back pulse signal, said integral multiple frequency being different from the higher harmonic frequency tuned in said first resonance circuit.

Claim 16

a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and (1<l≲n), the improvement comprising a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of the fly-back pulses, said odd number being not less than seven; and a second resonance circuit connected to at least one of the primary winding and the secondary winding of said fly-back transformer and adapted to be tuned to a higher harmonic of a frequency which is an integral multiple of the fundamental frequency of the fly-back pulse signal, said integral multiple frequency being different from the higher harmonic frequency tuned in said first resonance circuit.

Claim 17

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post foucsing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be turned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than nine multiple stage multiplying voltage rectifier means made up of voltage rectifier circuits formed into n stages for producing high DC voltages from the output of said fly-back transformer and connected to one terminal of the secondary winding of said fly-back transformer; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and where (1<m<n); a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and where (1<l≲n); a second voltage stabilizing element and a resistor both connected in series between an output terminal of the k-th stage and another output terminal of said multiple stage voltage rectifier means, where k is an integer and where (l<k<n), the voltage of said another terminal being higher than that of k-th stage; and means for obtaining a third high voltage from the junction point of said second voltage stabilizing element and said resistor.

Claim 18

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post foucsing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be turned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than nine multiple stage multiplying voltage rectifier means made up of voltage rectifier circuits formed into n stages for producing high DC voltages from the output of said fly-back transformer and connected to one terminal of the secondary winding of said fly-back transformer; means for obtaining a first DC voltage from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for outputting a second DC voltage obtained from the m-th stage of said voltage rectifier means, where m is an integer and where (1<m<n); a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential, where l is an integer and where (1<l≲n); a second voltage stabilizing element and a resistor both connected in series between an output terminal of the k-th stage and another output terminal of said multiple stage voltage rectifier means, where k is an integer and where (l<k<n), the voltage of said another terminal being higher than that of k-th stage; and means for obtaining a third high voltage from the junction point of said second voltage stabilizing element and said resistor.

Claim 19

A high voltage circuit according to claim 11, further comprising a capacitor element inserted between said junction point of said second voltage stabilizing element and said resistor and the k-th or the other stage of said multiple stage voltage rectifier means, the voltage of the other stage being lower than that of the k-th stage.

Claim 20

A high voltage circuit according to claim 11, wherein said second voltage stabilizing element is a Zener diode.

Claim 21

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be turned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than nine; multiple stage multiplying voltage rectifier means made up of voltage rectifier circuits formed into n stages for producing high DC voltages from the output of said fly-back transformer and connected to one terminal of the secondary winding of said fly-back transformer; means for outputting a first DC voltage obtained from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for obtaining a second DC voltage from the m-th stage of said voltage rectifier means, where m is an integer and where (1<m<n); a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential where l is an integer and where (1<l≲n); means for obtaining fly-back pulses from said fly-back transformer; a rectifier circuit for rectifying said fly-back pulses obtained by said obtaining means; and means for adding the output voltage of said rectifier circuit a high voltage obtained from an output terminal of an intermediate stage of said multiple stage voltage rectifier means and producing an output which is the result of said adding operation.

Claim 22

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit having such a parasitic constant as to be turned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than nine; multiple stage multiplying voltage rectifier means made up of voltage rectifier circuits formed into n stages for producing high DC voltages from the output of said fly-back transformer and connected to one terminal of the secondary winding of said fly-back transformer; means for outputting a first DC voltage obtained from the n-th stage of said voltage rectifier means, where n is an integer and is greater than 1; means for obtaining a second DC voltage from the m-th stage of said voltage rectifier means, where m is an integer and where (1<m<n); a first voltage stabilizing element connected between an output terminal of an l-th stage of said voltage rectifier means and a reference potential where l is an integer and where (1<l≲n); means for obtaining fly-back pulses from said fly-back transformer; a rectifier circuit for rectifying said fly-back pulses obtained by said obtaining means; and means for adding the output voltage of said rectifier circuit a high voltage obtained from an output terminal of an intermediate stage of said multiple stage voltage rectifier means and producing an output which is the result of said adding operation.

Claim 23

A high voltage circuit according to claim 14, wherein said means for obtaining said fly-back pulses comprises first and second capacitance elements connected in series between one end of the primary winding of said fly-back transformer and reference potential, and means for applying fly-back pulses divided by said first and second capacitance elements to said rectifier circuit.

Claim 24

A high voltage circuit according to claim 14, wherein said means for obtaining said fly-back pulses comprises first and second resistors connected in series between one end of the primary winding of said fly-back transformer and reference potential, and means for applying fly-back pulses divided by said first and second resistors to said rectifier circuit.

Claim 25

A high voltage circuit according to claim 14, in which said means for obtaining said fly-back pulses comprises a teritiary winding provided in said fly-back transformer.

Claim 26

A high voltage circuit according to claim 14, wherein said means for obtaining said fly-back pulses comprises first and second inductance elements connected in series between one end of the primary winding of said fly-back transformer and reference potential, means for applying fly-back pulses divided by said first and second inductance elements to said rectifier circuit, a winding wound on a core of one of said inductance elements, and means to supply a variable current to the last-mentioned winding, whereby a voltage provided from a point of connection of said first and second inductance elements can be changed by varying the current of said winding.

Claim 27

A high voltage circuit according to claim 14, wherein said rectifier circuit including first and second rectifiers connected in series between an intermediate stage of said multiple stage voltage rectifier means and an output terminal, and a capacitance element connected between said fly-back pulses obtaining means and the point of connection of said first and second rectifiers.

Claim 28

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of a fly-back pulse signal, said odd number being not less than nine; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having a first output terminal at the final stage thereof and second and third output terminals at intermediate stages thereof, said voltage-multiplying rectifier circuit further including a plurality of rectifier elements and a plurality of capacitor elements; means for deriving the plurality of high voltages of different values for the color picture tube from said first and second output terminals; a voltage stabilizing element connected between said third output terminal and a reference potential; and a second resonance circuit connected to at least one of the primary winding and the secondary winding of said fly-back transformer and adapted to be turned to a higher harmonic of a frequency which is an integral multiple of the fundamental frequency of the fly-back pulses, said integral multiple being different from the one to which said first resonance circuit is tuned.

Claim 29

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a first resonance circuit made up of leakage inductance and distributed capacitance of said fly-back transformer and having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of a fly-back pulse signal, said odd number being not less than nine; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having a first output terminal at the final stage thereof and second and third output terminals at intermediate stages thereof, said voltage-multiplying rectifier circuit further including a plurality of rectifier elements and a plurality of capacitor elements; means for deriving the plurality of high voltages of different values for the color picture tube from said first and second output terminals; a voltage stabilizing element connected between said third output terminal and a reference potential; and a second resonance circuit connected to at least one of the primary winding and the secondary winding of said fly-back transformer and adapted to be turned to a higher harmonic of a frequency which is an integral multiple of the fundamental frequency of the fly-back pulses, said integral multiple being different from the one to which said first resonance circuit is tuned.

Claim 30

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a resonance circuit having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven for providing improved high voltage circuit operation with respect to lower order odd number harmonic tuning; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having at least first and second output terminals at different respective stages of said voltage-multiplying rectifier circuit; and means for deriving the plurality of high voltages of different values for the color picture tube from the at least first and second output terminals.

Claim 31

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer including a resonance circuit having such a parasitic constant as to be tuned to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven for providing improved high voltage circuit operation with respect to lower order odd number harmonic tuning; a voltage-multiplying rectifier circuit with multiple stages connected to a secondary winding of said fly-back transformer and having at least first and second output terminals at different respective stages of said voltage-multiplying rectifier circuit; and means for deriving the plurality of high voltages of different values for the color picture tube from the at least first and second output terminals.

Claim 32

A high voltage circuit according to claim 21, wherein said resonance circuit is made up of leakage inductance and distributed capacitance of said fly-back transformer.

Claim 33

A high voltage circuit according to claim 22, wherein said odd number harmonic tuning provides

Claim 34

A high voltage circuit according to claim 23, wherein said voltage-multiplying rectifier circuit is provided with a third output terminal at an intermediate stage thereof, voltage stabilizing means being connected between said third output terminal and a reference potential.

Claim 35

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer having a primary winding and a secondary winding; means for tuning said fly-back transformer to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven; a voltage-multiplying rectifier circuit with multiple stages connected to the secondary winding of said fly-back transformer and having at least first and second output terminals at respective different stages of said voltage-multiplying rectifier circuit; and means for deriving the plurality of high voltages of different values for the color picture tube from at least said first and second output terminals.

Claim 36

A high voltage circuit for generating a plurality of high voltages of different values for a color picture tube of post focusing type, comprising: a fly-back transformer having a primary winding and a secondary winding; means for tuning said fly-back transformer to a higher harmonic with a frequency which is an odd number times as high as the fundamental frequency of fly-back pulses, said odd number being not less than seven; a voltage-multiplying rectifier circuit with multiple stages connected to the secondary winding of said fly-back transformer and having at least first and second output terminals at respective different stages of said voltage-multiplying rectifier circuit; and means for deriving the plurality of high voltages of different values for the color picture tube from at least said first and second output terminals.

Claim 37

A high voltage circuit according to claim 25, wherein said odd number is not less than nine.

Claim 38

A high voltage circit according to claim 25, wherein said voltage-multiplying rectifier circuit is provided with a third output terminal at an intermediate stage thereof, voltage stabilizing means being connected between said third output terminal and a reference potential.

Claim 39

A high voltage circuit according to claim 27, wherein said means for tuning said fly-back transformer includes a resonance circuit formed of leakage inductance and distributed capacitance of said fly-back transformer.