US3631533A - High-efficiency winding for toroid yoke - Google Patents

High-efficiency winding for toroid yoke Download PDF

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Publication number
US3631533A
US3631533A US44922A US3631533DA US3631533A US 3631533 A US3631533 A US 3631533A US 44922 A US44922 A US 44922A US 3631533D A US3631533D A US 3631533DA US 3631533 A US3631533 A US 3631533A
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Prior art keywords
turns
pair
windings
combination
horizontal
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Expired - Lifetime
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US44922A
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English (en)
Inventor
Charles Edward Torsch
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GTE Sylvania Inc
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Sylvania Electric Products Inc
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Assigned to NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP. reassignment NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP. ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981. (SEE DOCUMENT FOR DETAILS). Assignors: GTE PRODUCTS CORPORATION A DE CORP.
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
    • H01J29/702—Convergence correction arrangements therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/764—Deflecting by magnetic fields only using toroidal windings

Definitions

  • a cathode-ray tube deflection system includes a triad-type cathode-ray tube and a toroid-wound deflection yoke having horizontal and vertical axes with first and second horizontal windings disposed on opposite sides of the vertical axis and first and second vertical windings disposed on opposite sides of the horizontal axis.
  • Each of the vertical windings has a plurality of circumferentially spaced triads of turns with each triad of turn having a pair of first layer turns contiguous to a magnetic core and a second layer turn contacting and supported by a pair of first layer turns and having a diameter greater than either one of the pair of first layer turns,
  • the other well-known category is the in-line technique wherein a plurality of electron guns of a color cathode-ray tube are aligned in a single plane.
  • a toroid-type deflection yoke designed to accommodate the in-line electron guns, is utilized to effect electron beam scanning of a viewing screen.
  • the in-line system requires a specific type cathoderay tube as well as an especially designed deflection yoke formed to cooperate with the particular electron gun arrangement.
  • the total system requires an electron beam convergence technique or special size correction apparatus entirely foreign and inappropriate to the more common triad system.
  • the convergence and deflection apparatus required by the in-line system is improper for use with the more popular triad techniques and apparatus.
  • the above-mentioned pending applications entitled Deflection System For Triad-Beam Cathode-Ray Tube," provide an enhanced technique wherein a toroid-type electron beam deflection yoke is employed with the common and readily available triad-type color cathode-ray tube and associated convergence apparatus.
  • the deflection yoke includes a core of magnetic material having deflection and vertical axes with first and second horizontal deflection windings toroidally wrapped on the core on opposite sides of the vertical axis and first and second vertical deflection windings toroidally wrapped on the core on opposite sides of the horizontal axis.
  • a toroidwound core includes a plurality of layers wherein the turns of the layer adjacent the core have a larger diameter than the turns of a second layer supported thereon.
  • the decreased diameter of the second layer of turns compensates for the decrease in diameter of the core whereupon each layer includes the same number of turns.
  • toroid-wrapped core may be suitable for use in a transformer or similar apparatus, it is known that a reduction in turn diameter would serve to increase resistance and to decrease efficiency of a deflection yoke. Moreover, increasing the diameter of the turns of an inner layer would be improbable, if not impossible, with the above-described core and winding configuration wherein both layers have essentially the same number of turns.
  • a toroidwound deflection yoke having a core of magnetic material with a horizontal axis and a vertical axis, a pair of horizontal deflec tion windings disposed on opposite sides of the vertical axis, and a pair of vertical deflection windings disposed on opposite sides of the horizontal axis.
  • At least one pair of windings includes a triad of turns with a second layer turn supported by a pair of first layer turns and the second layer turn having a diameter greater than either turn of the pair of first layer turns.
  • FIG. I is a cross-sectional elevation of a triad-type color cathode-ray tube deflection system.
  • FIG. 2 is an end view, as seen by an observer of the viewing screen of a cathode-ray tube, of the toroidal-wound deflection yoke and associated connections to a power source.
  • FIG. 3 is an end view of a toroidal-wound deflection yoke illustrating horizontal deflection windings having second layer turns of a diameter greater than the first layer turns.
  • a color cathode-ray tub deflection system of the triad-type includes a color cathoderay tube 5 having a plurality of electron guns 7 and a viewing screen 9 which is impinged by electrons emanating from the electron guns 7.
  • the electron guns 7 are in a triad formation and the viewing screen includes red, green, and blue phosphors which are also arrayed in a triad formation.
  • a deflection yoke 11 Associated with the cathode-ray tube 5 is a deflection yoke 11 and a convergence coil 13.
  • the deflection yoke 11 surrounds the neck portion of the cathode-ray tube 5 and is disposed intermediate the electron guns 7 and the viewing screen 9.
  • the convergence coil 13 surrounds the neck portion of the cathode-ray tube 5 and is disposed intermediate the electron guns 7 and the deflection yoke 11.
  • the convergence coil 13 serves to alter the electron beams from the electron guns 7 such that the electron beam from each one of the electron guns 7 strike a specific red, green, or blue phosphor arrayed in triad form on the viewing screen 9.
  • the deflection yoke 11 operates on all of the electron beams to effect desired horizontal and vertical scanning of the viewing screen 9.
  • FIG. 2 illustrates a preferred configuration with some of the structural details eliminated for clarity.
  • a substantially circular core 15 of magnetic material has a horizontal axis HH and a vertical axis V-V'.
  • first and second horizontal deflection windings l7 and 19 in the form of turns of insulated electrical conductors, are preferably in mirror-image relationship with respect to one another about the vertical axis VV'.
  • each one of the first and second horizontal deflection windings 17 and 19 are preferably, not necessarily, substantially symmetrical and in mirror-image relationship with respect to the horizontal axis HH'.
  • each one of the first and second horizontal deflection windings l7 and 19 includes a flux-altering means 21 and 23, which may be in the form of a winding gap or short-circuited turns for example, substantially centrally disposed about the horizontal axis H H.
  • each one of the first and second horizontal deflection windings 17 and 19 is in the form of an intermittent bank winding.
  • the intermittent bank winding includes a plurality of circumferentially spaced triad windings each having a second layer turn contacting and supported by a pair of first layer turns.
  • first and second vertical deflection windings 29 and 31 in the form of turns of insulated electrical conductors and represented by white dots and including a plurality of circumferentially spaced triads, are interleaved with the first and second horizontal deflection windings 17 and 19.
  • These first and second vertical deflection windings 29 and 31 are also preferably in mirror-image relationship with respect to one another about the horizontal axis HH.
  • each one of the first and second vertical deflection windings 29 and 31 is preferably symmetrically centered and in mirror-image relationship about the vertical axis VV'.
  • each one of the first and second vertical deflection windings 29 and 31 has a flux altering means 33 and 35 centrally disposed with respect thereto and to the vertical axis VV'.
  • each one of the circumferentially spaced triads of the first and second vertical deflection windings 29 and 31 includes a first layer in the form of a pair of turns 37 contiguous with the circular magnetic core and a second layer in the form of a single turn 39 contacting and supported by the pair of turns 37.
  • This single turn 39 of the second layer of turns includes an electrical conductor surrounded by electrical insulating material and the conductor and insulator materials combine to provide a diameter greater than the diameter of any one of the supporting pair of turns 37.
  • the single turn 39 of the second layer of turns is of a diameter at least equal to and preferably larger than the diameter of the electrical conductor of any one of the supporting pair of turns 37. in this manner, the increased conductor size of the single turn 39 serves to decrease the resistance of the vertical windings 29 and 31. Since the resistance is inversely related to the efficiency of the windings 29 and 31, reduced resistance provides a desired increased efficiency of the vertical deflection windings 29 and 31.
  • the increased diameter of the single turn 39 may be achieved by increasing the electrical insulation rather than the electrical conducting materials.
  • the triad-type winding configuration permits either increased insulating capability or a reduction in resistance without alteration in the winding configuration.
  • the electrical potential intermediate each of the single turns 39 and the supporting pair of turns 37 is substantially constant. More specifically, a vertical input signal source 41 is coupled to the single turn 39 at one end of the second vertical deflection winding'31. The single turn 39 at the opposite end of the second vertical deflection winding 31 is coupled back by an external conductor 43 to the pair of turns 37 of the first layer of turns at one end of the second vertical deflection winding 31. The pair of turns 37 at the opposite end of the first layer of turns is coupled by an external jumper 45 to the pair of turns 37 of the first vertical deflection winding 29.
  • the pair of turns 37 at the opposite end of the first vertical deflection winding 29 is coupled back by a conductor 47 to the single turn 39 of the second layer of turns.
  • the single turn 39 at the opposite end of the first vertical deflection winding 29 is coupled to a potential reference level or circuit ground.
  • FIG, 3 illustrates a toroid-wound deflection yoke wherein horizontal deflection windings 18 and 20, represented by blackened dots, includes a first layer of turns 38 contiguous to a magnetic core 15 and a second layer of turns 40 in contact therewith.
  • the first layer of turns 38 has insulator-covered wire turns of a given diameter and the second layer of turns 40 has insulator-covered turns of a diameter greater than the given diameter of the first layer of turns 38.
  • the pair of turns 37 of each of the vertical deflection windings 29 and 31 are circumferentially spaced and toroidally wound on the substantially circular core 15 of magnetic material by advancement in opposite directions as indicated by the arrows of FIG. 2. Then, the first and second horizontal deflection windings 17 and 19 are circumferentially interleaved intermediate the vertical deflection windings 29 and 31.
  • These horizontal deflection windings 17 and 19 are of a bank-wound form wherein the turns of each triad are series connected and all turns of the triad are applied at one timev Moreover, the vertical deflection windings 29 and 31 inhibit undesired spreading and distortion of the bank-wound horizontal windings 17 and 19 upon application of the second layer of turns thereto. Also, the horizontal deflection windings 17 and 19 are applied by advancement in opposite directions as indicated by the arrows of FIG. 2.
  • a unique deflection yoke especially suitable for use in a color television receiver employing a triad-type color cathode-ray tube.
  • the deflection yoke is of the toroid type wherein first and second horizontal deflection windings and first and second vertical deflection windings are in the form of circumferentially spaced and interleaved triads of turns.
  • the triads of turns of the vertical deflection windings include a second layer turn supported by a pair of first layer turns wherein the diameter of the second layer turn is greater than the diameter of any one turn of the pair of first layer turns. in this manner, the triad winding configuration permits either increased conductor or increased insulation diameter of a second layer of turns whereby either resistance properties are desirably reduced or electrical insulation properties are desirably increased without undesired alterations in the winding configurations.
  • a deflection yoke comprising in combination:
  • a toroid core of magnetic material having a horizontal axis and a vertical axis
  • first and second horizontal deflection windings wrapped about said core on opposite sides of said vertical axis
  • each of said windings including a plurality of circumferentially spaced turns with a second layer turn contacting and supported by a pair of first layer turns contiguous with the core;
  • first and second vertical deflection windings wrapped about said core on opposite sides of said horizontal axis, each of said windings including a plurality of circumferentially spaced turns including a pair of first layer turns contiguous with the core and a second layer turn contacting and supported by said pair of first layer turns and of a diameter greater than the diameter of either one of said pair of first layer turns.
  • each of said turns of said first and second layers includes a conductor and said diameter of said conductor of said second layer turn of said first and second vertical deflection windings is greater than said diameter of said conductor of either turn of said pair of first layer turns.
  • each of said first and second horizontal deflection windings includes a flux-altering means substantially symmetrical to said horizontal axis.
  • each of said first and second vertical deflection windings includes a flux-altering means substantially symmetrical to said vertical axis.
  • a toroid-wound deflection yoke for a color cathode-ray tube having a plurality of electron guns arrayed in the form of a triad comprising in combination:
  • a substantially circular core or magnetic material having horizontal and vertical axes
  • first and second horizontal deflection windings oppositely disposed on said core about said vertical axis, said windings each including a plurality of circumferentially spaced triads of turns with each triad having a pair of turns contiguous to the core and a turn contacting and supported by the pair of turns;
  • first and second vertical deflection windings oppositely disposed on said core about said horizontal axis, said windings each including a plurality of circumferentially spaced triads of turns interleaved with said first and second horizontal deflection windings and each triad having a pair of turns contiguous to the core and a turn of a diameter greater than the diameter of either one of said pair of turns contacting and supported by said pair of turns.
  • first and second horizontal deflection windings and said first and second vertical deflection windings each include a flux-altering means substantially centrally disposed about said horizontal and vertical axis respectively.
  • first and second horizontal deflection windings are in mirror-image relationship to one another about said vertical axis and said first and second vertical deflection windings are in mirrorimage relationship to one another about said horizontal axis.

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US44922A 1970-06-10 1970-06-10 High-efficiency winding for toroid yoke Expired - Lifetime US3631533A (en)

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Application Number Priority Date Filing Date Title
US4492270A 1970-06-10 1970-06-10

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US (1) US3631533A (enExample)
CA (1) CA935864A (enExample)
DE (1) DE2128303A1 (enExample)
FR (1) FR2096131A5 (enExample)
GB (1) GB1318660A (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735299A (en) * 1971-10-04 1973-05-22 Rca Corp Color television deflection yoke having reduced variation in beam trio distortion
US4232253A (en) * 1977-12-23 1980-11-04 International Business Machines Corporation Distortion correction in electromagnetic deflection yokes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925542A (en) * 1957-05-31 1960-02-16 Gen Electric Deflection and dynamic convergence system for multi-beam cathode ray tubes
US3430099A (en) * 1966-08-23 1969-02-25 Gen Electric Simplified deflection system for plural in-line beam cathode ray tube
US3548350A (en) * 1969-01-15 1970-12-15 Gen Electric Wide angle deflection yoke for producing optimally non-uniform deflection fields

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2925542A (en) * 1957-05-31 1960-02-16 Gen Electric Deflection and dynamic convergence system for multi-beam cathode ray tubes
US3430099A (en) * 1966-08-23 1969-02-25 Gen Electric Simplified deflection system for plural in-line beam cathode ray tube
US3548350A (en) * 1969-01-15 1970-12-15 Gen Electric Wide angle deflection yoke for producing optimally non-uniform deflection fields

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735299A (en) * 1971-10-04 1973-05-22 Rca Corp Color television deflection yoke having reduced variation in beam trio distortion
US4232253A (en) * 1977-12-23 1980-11-04 International Business Machines Corporation Distortion correction in electromagnetic deflection yokes

Also Published As

Publication number Publication date
FR2096131A5 (enExample) 1972-02-11
GB1318660A (en) 1973-05-31
DE2128303A1 (de) 1971-12-16
CA935864A (en) 1973-10-23

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Owner name: NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP.,

Free format text: ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981.;ASSIGNOR:GTE PRODUCTS CORPORATION A DE CORP.;REEL/FRAME:003992/0284

Effective date: 19810708

Owner name: NORTH AMERICAN PHILIPS CONSUMER ELECTRONICS CORP.

Free format text: ASSIGNS ITS ENTIRE RIGHT TITLE AND INTEREST, UNDER SAID PATENTS AND APPLICATIONS, SUBJECT TO CONDITIONS AND LICENSES EXISTING AS OF JANUARY 21, 1981.;ASSIGNOR:GTE PRODUCTS CORPORATION A DE CORP.;REEL/FRAME:003992/0284

Effective date: 19810708