US3849749A - Deflection coils producing pincushion and barrel deflection fields - Google Patents

Deflection coils producing pincushion and barrel deflection fields Download PDF

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Publication number
US3849749A
US3849749A US00331600A US33160073A US3849749A US 3849749 A US3849749 A US 3849749A US 00331600 A US00331600 A US 00331600A US 33160073 A US33160073 A US 33160073A US 3849749 A US3849749 A US 3849749A
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Prior art keywords
deflection
coils
deflection coil
coil
coil unit
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Expired - Lifetime
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US00331600A
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English (en)
Inventor
T Kadota
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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Priority claimed from JP1666272A external-priority patent/JPS4886429A/ja
Priority claimed from JP2088472A external-priority patent/JPS5634982B2/ja
Priority claimed from JP2088372A external-priority patent/JPS5643590B2/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/08—Winding conductors onto closed formers or cores, e.g. threading conductors through toroidal cores
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/071—Winding coils of special form
    • H01F2041/0711—Winding saddle or deflection coils

Definitions

  • ABSTRACT A magnetic deflection apparatus for displacing an electron beam in a cathode ray tube, and more particularly a deflection yoke for use in a color television receiver which comprises a plurality of deflection coil units arranged contiguously in the axial direction of the tube, whereby the deflection field at the central portion of the deflection coil units or the deflection field on the electron gun side of the central portion has a barrel field distribution and the deflection field on the screen side has a pincushion field distribution, thereby easily correcting pincushion and convergence distortions.
  • FIG. 1 A first figure.
  • FIG. 1 A first figure.
  • FIG. 1 A first figure.
  • the present invention relates to a magnetic deflection apparatus used in a color television receiver to displace an electron beam therein.
  • the characteristics of a deflection yoke employed in a color television receiver has various effects on the picture quality of a color picture tube. While some of these effects may be corrected by means of circuit designing, there are some others which may not be readily corrected by circuit designing and which are thus entirely dependent on the characteristics of a deflection yoke used. For instance, while pincushion distortion may be corrected by means of a specially designed circuit, it is difficult to correct convergence distortion by means of circuit designing. As a result, since the abovementioned convergence distortion and other cannot be corrected by means of circuit designing, it has been customary to discard the deflection yoke as a reject, if the variation in the characteristic of a deflection yoke caused during the manufacturing process exceeds the allowable limits.
  • FIG. I is a diagram showing a magnetic field distribution of a prior art deflection yoke
  • FIG. 2 is a side view showing, part in section, of an embodiment of a deflection yoke according to the present invention
  • FIG. 3 is a section taken on the line III-III of FIG.
  • FIG. 4 shows a'magnetic field distribution of the deflection yoke shown in FIG. 2;
  • FIG. 5 is a side view of another embodiment comprising three of the contiguously arranged deflection coil units shown in FIG. 3; 7
  • FIG. 6 shows a magnetic field distribution of the deflection yoke shown in FIG. 5;
  • FIG. 7 is a side view showing, part in section, another embodiment of this invention comprising a plurality of contiguously arranged deflection coil units;
  • FIGS. 8a, 8b and 8c show the magnetic field distributions on the cross section of the respective deflection coil units of FIG. 7;
  • FIG. 9 is a section showing the wiring distribution of the deflection coil unit of FIG. 7 taken along the plane perpendicular to the tube axis;
  • FIG. 10 showsa magnetic field distribution of the deflection yoke shown in FIG. 11;
  • FIG. 11 is a side view showing, part in section, a deflection yoke having the field distribution characteristic shown in FIG. 10 and constituting one form of the practical application of the deflection yoke shown in FIG.
  • FIG. I2 is a side view showing, part in section. another embodiment of the deflection yoke of the invention, wherein the distance between two deflection coil units is adjustable;
  • FIG. I3 is a side view of another embodiment of the deflection yoke of the invention, wherein the distance between the opposing end faces along the tube axis differs between the electron gun side and the screen side;
  • FIG. 14 is a section taken along the line XIVXIV of FIG. 13;
  • FIG. 15 is a section taken along the line XVXV of FIG. 13;
  • FIG. 16 is a side view of another embodiment of the deflection yoke of the invention, wherein that portion called a window having no coil windings therein differs in space between the electron gun side and the screen side;
  • FIG. I7 is a section taken along the line XVIIXVII of FIG. I6;
  • FIG. 18 is a section taken along the line XVIII-X- VIII of FIG. I6;
  • FIG. 19 is a fractional explanatory view of another embodiment of the deflection yoke of the invention. wherein there is a difference in coil pitch angle between the electron gun side and the screen side.
  • FIG. I of the drawing there is shown a magnetic field distribution of a conventional deflection yoke.
  • the abscissa represents the distance in axial direction and the ordinate represents the magnitude of the magnetic field.
  • the curve 0 indicates the magnetic field distribution in the axial direction of the deflection yoke and the curve h indicates the magnetic field distribution along the section perpendicular to the axis of the deflection yoke.
  • the por tions of the curves a and b above the horizontal line indicate the pincushion field regions, while those portions below the horizontal line indicate the barrel field regions. The strength of each of these regions is indicated by its distance from the horizontal line.
  • the pincushion field region of the deflection yoke produces a barrel distortion in the picture, while the barrel field region produces a pincushion distortion in the picture.
  • the deflection field must be uniform to satisfy the convergence characteristic and such a uniform field may be accomplished by distributing the windings in what is known as a cosine distribution.
  • the magnetic field at the ends of a coil of finite length tends to take the formof a barrel field due to the breaking out of the magnetic field and therefore this situation must be compensated for by making the magnetic field inside the coil to take the form of a pin cushion field to some extent.
  • the magnetic field distribution of a conventional deflection yoke takes the form as shown in FIG. I.
  • the pincushion field regions provided by the portions of the curve b above the horizontal line in FIG. I distort the shape of a circular beam spot into an oval form.
  • the barrel field region provided by the portion of the curve b below the horizontal line also distorts the beam spot from its circular shape into an oval form.
  • the present invention stems from the recognition of this fact that a pincushion distortion is produced in the picture by the screen-side barrel field region of the deflection yoke.
  • the screen-side deflection field of a deflection yoke is distributed in a pincushion field distribution to correct pincushion distortion of the picture and at the same time the deflection field at the central portion of the deflection yoke or on the electron gun side of the central portion is distributed in a barrel field distribution in correspondence with the pincushion field distribution on the screen side, thereby easily accomplishing the correction of convergence distortion along with the above-mentioned correction of pincushion distortion.
  • numerals 1 and 2 designate deflection yokes each having horizontal and vertical deflection coils.
  • the deflection yokes 1 and 2 are arranged side by side in the axial direction of a cathode ray tube and are put together by a C-shaped spring 3.
  • the spring 3 is provided with square projections 4.
  • the square projections 4 are fitted in slits 6 formed in a housing holding the deflection yokes 1 and 2 in place.
  • the housing 5 is clamped on the neck portion of the cathode ray tube by a band 7.
  • numeral 8 designates a ring core of ferromagnetic material constituting a part of the deflection yoke 2, 9 main deflection coils, l0 auxiliary deflection coils.
  • the coils shown in the figure have a fewer number of turns than the actual number of turns and the coils on the outside of the core 8 are not shown since they are not necessary for the purposes of this discussion.
  • the main deflection coil 9 is uniformly wound on the core 8, while the auxiliary deflection coil is wound respectively to overlap the main deflection coil 9 at the central portion and the outer sides thereof.
  • the auxiliary deflection coil 10 at the central portion of the main deflection coil 9 is designated as 10a and the auxiliary deflection coil 10 at the outer sides of the main deflection coil 9 is designated as 10b.
  • the direction of current flow in the auxiliary deflection coil 10a is opposite to that in the outer side auxiliary deflection coil 10b and that the direction of current flow in the auxiliary deflection coil 10b is the same as in the main deflection coil 9.
  • AC cordingly. at the central portion of the main deflection coil 9. the main deflection coil 9 and the auxiliary deflection coil 10a produce magnetic fields in such directions which cancel each other, while, at the outer sides of the main deflection coil 9, magnetic fields are produced in such directions that they are added together.
  • the deflection field of the deflection yoke 2 is distributed in a barrel field distribution.
  • the main deflection coil 9 and the auxiliary deflection coil 10a produce magnetic fields in such directions that they are added together, while. at the outer sides of the main deflection coil 9. magnetic fields are produced in such directions which cancel each other. Consequently, the deflection field of the deflection yoke 2 is distributed in a pincushion field distribution. This also applies to the other deflection yoke l.
  • the intensity of the axial magnetic field is constant.
  • the magnetic field distribution on the transverse section can be changed without changing the form of the magnetic field distribution in the axial direction of the tube. This in turn means that the deflection characteristic can be changed without changing the deflection amplitude.
  • the curve a indicates an axial magnetic field distribution and the curve b indicates a magnetic field distribution on the section perpendicular to the tube axis.
  • the occurrence of pincushion distortion is proportional to the distance between the curve b, and the abscissa. Since a difference in area between the pincushion region and the barrel region is responsible for the production of convergence distortion, the pincushion and convergence distortions can be corrected as desired by adjusting the ratio and intensity of current flow in each of the respective auxiliary deflection coils of the deflection yokes l and 2.
  • the correction of both pincushion and convergence distortions can be accomplished by means of two deflection coil units which are arranged side by side in the axial direction of the tube and are provided respectively with main and auxiliary deflection coils and in which the ratio and intensity of current flow in each of the auxiliary deflection coils of the respective deflection coil units are changed as desired.
  • the pincushion correction circuit which has heretofore been necessary can be eliminated. This simplifies the circuit construction and thus permits a reduction in the manufacturing cost.
  • FIG. 5 shows another embodiment of the present invention.
  • the embodiment of FIG. 5 comprises three deflection yokes each having the same main and auxiliary deflection coils 9 and 10 as in the first embodiment and arranged side by side in the axial direction of a cathode ray tube.
  • the direction of current flow in each of the auxiliary deflection coils is selected so that the magnetic field of a central deflection yoke I I is distributed in a barrel field distribution.
  • FIG. 6 shows the magnetic field distribution curves for this embodiment constructed as above described.
  • the curve b in the vicinity of the peak of the axial magnetic field distribution, i.e., the curve athe magnetic field distri bution on the section taken at right angles to the tube axis, i.e., the curve b takes the form of a barrel magnetic field and the transectional magnetic field distributions (curve b at'the skirts of the axial magnetic field distribution (curve a take the form of a pincushion magnetic field.
  • the intensity and ratio of current flow in each of the auxiliary deflection coils of the respective deflection yokes so as to make the area of both the barrel and pincushion regions equal to each other, a deflection yoke which is free from both pinchusion and convergence distortions can be provided.
  • FIG. 7 is still another embodiment of the present invention.
  • the embodiment of FIG. 7 comprises a pluralityof deflection yoke subassemblies contiguously arranged irzfie axial direction of a cathode ray tube.
  • the construe on of this embodiment is such that the central deflection yoke subassembly has a barrel magnetic field distribution and the deflection yoke subassembly on each side of the central subassembly has a pincushion magnetic field distribution.
  • numeral designates a deflection yoke comprising a ferromagnetic core 2
  • the horizontal deflection coils 23, 24 and 25 and the vertical deflections coils 26, 27 and 28 are arranged contiguously in the axial direction of the tube.
  • FIGS. 80, 8b and 8c show respectively the magnetic field distributions on the sections taken at right angles to the tube axis along the lines VIIIa-VIIIa, VIIIb- VIII! and VIIIc'VIIIc of the horizontal and vertical deflection coils 23 and 26, the horizontal and vertical deflection coils 24 and 27, and the horizontal and vertical deflection coils 25 and 28, respectively.
  • FIGS. 8a and 80 show respectively a pincushion field distribution and FIG. 8b shows a barrel field distribution.
  • FIG. 9 there is shown a winding distribution when the deflection coils are cut through in a plane perpendicular to the tube axis.
  • n represents a winding density when the angle ,8 is zero. Therefore, it follows that in the deflection yoke 20 of FIG.
  • the deflection coils 23, 26 and 25, 28 have been wound with the winding distributions providing m I, while the deflection coils 24, 27 have been wound with the winding distribution providing m l.
  • the value of m for the respective coils must be selected in such a manner that the occurrence of both pincushion and convergence distortions may be prevented.
  • the magnetic field produced by the central coil unit is distributed in a barrel field distribution and the magnetic field produced by the coil unit on each side ofthe central coil unit is distributed in a pincushion field distribution and if the intensity of the respective magnetic fields is adjusted by a suitable winding distribution. then there results a deflection yoke which is free from both pincushion and convergence distorions.
  • FIG. 7 While the embodiment of FIG. 7 has been shown as applied to a saddle type deflectionyoke, the present invention is not limited to it and the present invention can be equally applied. for example. to saddle-toroidal deflection coils and toroidal-toroidal deflection coils with equal effectiveness.
  • an increase in the deflection angle for a deflection yoke has the effect of moving the peak of an axial magnetic field distribution to the rear (to the electron gun side) as shown by the curve 11 in FIG. 10.
  • the transectional magnetic field distribution may take a form as shown by the curve b in FIG. 10.
  • a deflection yoke may be composed of two deflection coil units. In this arrangement. the respective deflection coils may be wound in accordance with the manner of the embodiment shown in FIG.
  • the deflection field of the rear (electron gun side) deflection coil unit consists of a barrel magnetic field and the deflection field of the front (screen side) deflection coil unit consists of a pincushion magnetic field.
  • FIG. II One form of this kind of arrangement is shown in FIG. II.
  • numeral 30 designates a ferromagnetic core
  • the horizontal and vertical deflection coils 31 and 33 on the electron gun side and the horizontal and vertical deflection coils 32 and 34 on the screen side are arranged side by side in the axial direction of the tube.
  • a deflection yoke with a magnetic field dis tribution substantially as shown in FIG. 6 may be provided, if two deflection yokes each thereof having separately a magnetic field distribution as shown in FIG. I
  • FIG. I2 One form of this arrangement is shown in FIG. I2.
  • numeral 40 designates a deflection yoke subassembly disposed at the rear, i.e., on the electron gun side
  • numeral 41 designates a deflection yoke assembly disposed at the front, i.e.. on the screen side at a distance from the deflection yoke assembly 40.
  • the deflection yoke is composed of the deflection yoke subassemblies and 41.
  • the rear deflection yoke subassembly 40 consists of a ferromagnetic core 42 and horizontal and vertical deflection coils 43 and 44 having a pincushion field distribution.
  • the front deflection yoke subassembly 41 consists of a ferromagnetic core 45 and horizontal and vertical deflection coils 46 and 47 having a pincushion field distribution.
  • the deflection yoke subassemblies 40 and 41 are joined together by a metal joint 48.
  • One end of the metal joint 48 is secured to the deflection yoke subassembly 41 and an elongated axial slit 49 is provided at the other end adjoining the deflection yoke subassembly 40 so that the deflection yoke subassembly 40 slides in the slit 49 to adjust the distance between the deflection yoke subassemblies 40 and 41.
  • the area of the curve [1 below the abscissa line. i.e., the barrel field distribution can be adjusted as desired.
  • the correction of convergence distortion can be effected through the adjustment of distance between the two deflection yoke subassemblies.
  • the correction of pincushion distortion is also possible.
  • FIG. 13 illustrates still another embodiment of the present invention.
  • numeral 50 designates a deflection yoke comprising a pair of deflection coil units 51 and 52 each having horizontal and vertical deflection coils.
  • a distance D between opposed end faces 53 and 54 of the deflection coil units 51 and 52 along the tube axis (the line a-a) is made so that if the distance D at the rear (electron gun side) is designated D and D represents the distance D at the front (screen side), then there is a relation In other words, the distance D gradually decreases from the rear (electron gun side) toward the front (screen side).
  • FIGS. 14 and 15 show respectively the sections taken along the lines XlVXIV and XV-XV of the deflec-- tion yoke 50 shown in FIG. 13.
  • FIGS. 14 and 15 (1
  • FIGS. 16 through 18 illustrate still another embodiment of the present invention.
  • FIG. 17 is a section taken along the line XVII-XVII of the deflection yoke shown in FIG. 16
  • FIG. 18 is a section taken along the line XVIII-XVIII of the deflection yoke shown in FIG. 16.
  • a distance D between opposed end faces 62 and 63 of a pair of deflection coil units and 61 along the tube axis is uniform.
  • the construction of this embodiment is such that if 01 represents the angle of the central portion of the deflection coil units 60 and 61, Le, the portion known as a window with no winding disposed therein, a, represents the angle at the rear portion (electron gun side) of the coil units and (1 represents the angle of the front portion (screen side), then there is a relation In other words, the angle a increases gradually from the rear portion toward the front portion.
  • the same magnetic field distribution as the deflection yoke 50 shown in FIG. 13 can be provided for the deflection yoke 64, that is. a barrel field distribution at the rear portion and a pincushion field distribution at the front portion of the de' flection yoke 64 can be obtained.
  • the same results can be obtained by the combination of the methods of FIGS. 13 and 16.
  • FIG. 19 illustrates still another embodiment of the present invention.
  • FIG. 19 shows a principal part of a toroidal deflection yoke.
  • numeral designates a ferromagnetic core, 7] a coil wound on the ferromagnetic core 70.
  • the coil 71 is wound so that if [3 represents the angle of a single pitch of the coil 71, Li, represents the angle [3 at the rear portion of the coil and B represents the angle [3 at the front portion (screen side), then there results a relation 3, B
  • a barrel field distribution at the rear portion and a pincushion field distribution at the front portion can be obtained. In other words. the simultaneous correction of pincushion and convergence distortions can be effected.
  • the deflection yoke arrangements of very simple construction according to the present invention can be used to effect the simultaneous correction of pincushion and convergence distortions. It will also be seen that the present invention eliminates the heretofore used pincushion correction circuit with resultant simplificiation of the circuit construction and a reduction in the manufacturing cost of television sets.
  • a deflection yoke comprising a plurality of deflection coils arranged contiguously along a tube axis, and wherein the deflection field of said deflection coil located in the center of said plurality of deflection coils is distributed in a barrel magnetic field distribution. and the deflection field of said deflection coil located on each side of said centrally located deflection coil is distributed in a pincushion magnetic field distribution.
  • a deflection yoke comprising a plurality of deflection coils arranged contiguously along a tube axis, and wherein the deflection field of said deflection coil located on an electron gun side is distributed in a barrel magnetic field distribution, and the deflection field of said deflection coil located on a screen side is distributed in a pincushion magnetic field distribution.
  • a deflection yoke comprising a plurality of deflection coil units arranged contiguously in the direction of a tube axis, wherein each of said plurality of deflection coil units comprises horizontal and vertical deflection coils each thereof including a main coil wound in a unifomily distributed winding and an auxiliary coil overlapping said main coil to adjust a magnetic field distribution on a section taken at right angles to said tube axis, and wherein said auxiliary coil is wound so that the direction of current flow in said auxiliary coil overlapping the central winding of said main coil is opposite to that in said auxiliary coil overlapping the outer side winding portions of said main coil.
  • a deflection yoke according to claim 3 wherein the direction of current flow in each of said auxiliary coils of said deflection coil unit located on an electron gun side is selected so that said deflection coil unit located on the electron gun side has its deflection field distribued in a barrel magnetic field distribution, and
  • a deflection yoke wherein the direction of current flow in each of said auxiliary coils of said deflection coil unit located in the center of said plurality of deflection coil units is selected so that said centrally located deflection coil unit has its deflection field distributed in a barrel magnetic field distribution, and wherein the direction of current flow in each of said auxiliary coils of said deflection coil unit located on each side of said centrally located deflection coil unit is selected so that said deflection coil unit on each side of said centrally located deflection coil unit has its deflection field distributed in a pincushion magnetic fleld distribution.
  • a deflection yoke according to claim 4 wherein the direction of current flow in the auxiliary coil portions wound on the outer side winding portions of the main coils in the deflection coil unit located on the electron gun side is the same with that in said main coils.
  • a deflection yoke according to claim 4 wherein the direction of current flow in the auxiliary coil portions wound on the central winding portions of the main coils in the deflection coil unit located on the screen side is the same with that in said main coils.
  • a deflection yoke wherein n represents a winding density at a given angle [3 of the winding distribution of the deflection coil unit within a plane perpendicular to the tube axis. said n being given by n n cos '"B, where n represents a winding density when said angle [3 is zero. wherein the deflection coil unit of m 1 is centrally located. and wherein the deflection coil unit of m I is located on each side of said centrally located deflection coil unit.
  • n represents a winding density at a given angle B ofthe winding distribution of the deflection coil unit within a plane perpendicular to the tube axis. said 11 being given by n n cos "'B, where n represents a winding density when said angle [3 is zero, wherein the deflection coil unit of m 1 is located on the electron gun side. and wherein the deflection coil unit of m 1 is located on the screen side.
  • each of the two deflection coils having a pincushion magnetic field distribution comprises a plurality of coils arranged contiguously with a distance therehetween in the direction of the tube axis, and wherein said distance between said deflection coils is adjustable.

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US00331600A 1972-02-16 1973-02-12 Deflection coils producing pincushion and barrel deflection fields Expired - Lifetime US3849749A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1666272A JPS4886429A (ja) 1972-02-16 1972-02-16
JP2088472A JPS5634982B2 (ja) 1972-02-28 1972-02-28
JP2088372A JPS5643590B2 (ja) 1972-02-28 1972-02-28

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CA (1) CA980851A (ja)
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GB (1) GB1407166A (ja)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041428A (en) * 1975-09-02 1977-08-09 Sony Corporation Deflection yoke for use with in-line cathode ray tubes
DE2628862A1 (de) * 1976-06-26 1978-01-12 Bosch Gmbh Robert Ablenksystem fuer kathodenstrahlroehren
US4096462A (en) * 1976-04-09 1978-06-20 Hitachi, Ltd. Deflection yoke device for use in color television receiver sets
DE2707522A1 (de) * 1977-02-22 1978-08-24 Tokyo Shibaura Electric Co Kathodenstrahl-farbbildroehre mit magnetischem ablenkjoch
US4117434A (en) * 1977-01-19 1978-09-26 General Electric Company Hybrid deflection system with quadripolar correction coils
US4242612A (en) * 1978-02-06 1980-12-30 U.S. Philips Corporation Deflection unit for color television display tubes
US4257024A (en) * 1978-09-20 1981-03-17 Tokyo Shibaura Denki Kabushiki Kaisha Color picture tube apparatus
US5177412A (en) * 1989-05-26 1993-01-05 Kabushiki Kaisha Toshiba Color cathode ray tube apparatus
WO1997031360A1 (en) * 1996-02-23 1997-08-28 Sarnoff Corporation Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen
US20030184420A1 (en) * 2002-03-28 2003-10-02 Sanyo Electric Co., Ltd. Convergence yoke

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
NL7908000A (nl) * 1979-11-01 1981-06-01 Philips Nv Afbuigjuk.
NL8006628A (nl) * 1980-12-05 1982-07-01 Philips Nv Kathodestraalbuis - afbuigeenheid combinatie met hoog oplossend vermogen.
NL8602803A (nl) * 1986-11-06 1988-06-01 Philips Nv Beeldweergeefinrichting.
JP3034896B2 (ja) * 1989-05-26 2000-04-17 株式会社東芝 カラー映像管装置

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US2617059A (en) * 1949-12-02 1952-11-04 Hartford Nat Bank & Trust Co Cathode-ray tube
US3735193A (en) * 1970-12-26 1973-05-22 Denki Onkyo Co Ltd Deflection yoke
US3735299A (en) * 1971-10-04 1973-05-22 Rca Corp Color television deflection yoke having reduced variation in beam trio distortion
US3763452A (en) * 1970-09-09 1973-10-02 Denki Onkyo Co Ltd Color television picture tube apparatus

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US3226588A (en) * 1962-07-09 1965-12-28 Rca Corp Electromagnetic deflection yoke

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Publication number Priority date Publication date Assignee Title
US2617059A (en) * 1949-12-02 1952-11-04 Hartford Nat Bank & Trust Co Cathode-ray tube
US3763452A (en) * 1970-09-09 1973-10-02 Denki Onkyo Co Ltd Color television picture tube apparatus
US3735193A (en) * 1970-12-26 1973-05-22 Denki Onkyo Co Ltd Deflection yoke
US3735299A (en) * 1971-10-04 1973-05-22 Rca Corp Color television deflection yoke having reduced variation in beam trio distortion

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041428A (en) * 1975-09-02 1977-08-09 Sony Corporation Deflection yoke for use with in-line cathode ray tubes
US4096462A (en) * 1976-04-09 1978-06-20 Hitachi, Ltd. Deflection yoke device for use in color television receiver sets
DE2628862A1 (de) * 1976-06-26 1978-01-12 Bosch Gmbh Robert Ablenksystem fuer kathodenstrahlroehren
US4117434A (en) * 1977-01-19 1978-09-26 General Electric Company Hybrid deflection system with quadripolar correction coils
DE2707522A1 (de) * 1977-02-22 1978-08-24 Tokyo Shibaura Electric Co Kathodenstrahl-farbbildroehre mit magnetischem ablenkjoch
US4242612A (en) * 1978-02-06 1980-12-30 U.S. Philips Corporation Deflection unit for color television display tubes
US4257024A (en) * 1978-09-20 1981-03-17 Tokyo Shibaura Denki Kabushiki Kaisha Color picture tube apparatus
US5177412A (en) * 1989-05-26 1993-01-05 Kabushiki Kaisha Toshiba Color cathode ray tube apparatus
WO1997031360A1 (en) * 1996-02-23 1997-08-28 Sarnoff Corporation Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen
US5719476A (en) * 1996-02-23 1998-02-17 David Sarnoff Research Center, Inc. Apparatus for correcting distortion of an electron beam generated spot on a cathode ray tube screen
US20030184420A1 (en) * 2002-03-28 2003-10-02 Sanyo Electric Co., Ltd. Convergence yoke
US6836200B2 (en) * 2002-03-28 2004-12-28 Sanyo Electric Co., Ltd. Convergence yoke

Also Published As

Publication number Publication date
GB1407166A (en) 1975-09-24
DE2307268B2 (de) 1975-12-18
DE2307268A1 (de) 1973-08-23
CA980851A (en) 1975-12-30
FR2172286A1 (ja) 1973-09-28
FR2172286B1 (ja) 1977-08-12

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