US3725831A - Magnetic beam adjusting arrangements - Google Patents

Magnetic beam adjusting arrangements Download PDF

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Publication number
US3725831A
US3725831A US00217757A US3725831DA US3725831A US 3725831 A US3725831 A US 3725831A US 00217757 A US00217757 A US 00217757A US 3725831D A US3725831D A US 3725831DA US 3725831 A US3725831 A US 3725831A
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neck
pair
magnet rings
pole
region
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US00217757A
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R Barbin
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RCA Licensing Corp
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RCA Corp
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Assigned to RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE reassignment RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: RCA CORPORATION, A CORP. OF DE
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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
    • H01J29/703—Static convergence systems

Definitions

  • ABSTRACT A pair of four-pole magnet rings, each mounted for independent, concentric rotational adjustment about the neck of an in-line, tri-beam shadow-mask color kinescope, constitute a facility for introducing mu- [111 3,725,831 [451 Apr. 3, 1973 tually opposing shifts of the outer beams of the in-line trio in any desired direction, without substantially affecting the central, axial beam, and without requiring internal pole piece structures for field directing purposes.
  • a pair of 6-pole magnet rings each mounted for independent, concentric rotational adjustment about an adjacent region of the color kinescope neck, constitute an additional facility for introducing likedirection shifts of the outer beams of the in-line trio in any desired direction, without substantially affecting the central beam, and without requiring internal pole piece structures for field directing purposes.
  • the two magnet ring pairs together provide an arrangement for effecting static convergence of the beam trio at the kinescope screen.
  • a third pair of two-pole magnet rings similarly subject to rotational adjustment about the kinescope neck, provide means for introducing like-direction shifts of all three beamsin any desired direction for conventional purity adjustment purposes.
  • the twopole ring pair, six-pole ring pair and four-pole ring pair appear in axially spaced relation of a common mount surrounding the kinescope neck to the rear of a deflection yoke (with the ring pairs in the order named, progressing from the neck base toward the yoke rear) and constitute the only neck components (exclusive of the deflection yoke) required in set-up and operation of the color kinescope.
  • the electron beam sources are aligned to originate beam paths having axes lying essentially in a common plane, with a central beam path oriented in registry with the tube, neck axis and with respective outer beam paths symmetrically disposed on opposite sides of the central beam.
  • the three beams strike coincident regions of the phosphor screen of the kinescope.
  • the gun structures of the kinescope ideally are designed to effect such convergence of the beams at thescreen center in the absence of beam deflection
  • practical tolerances in the manufacture of the kinescope and associated components dictate the need for associating with the kinescope suitable means for correcting a range of center-ofscreen misconvergence errors that may be encountered in actual practice
  • Adjustable magnetic fields are usually employed in effecting the requisite static convergence adjustments
  • the present invention is directed to an adjustable magnet arrangement facilitating the achievement of static convergence of in-line beams without the use-of internal field-directing pole piece structures.
  • provision is made for the establishment of adjustable magnetic fields of two different characters in axially spaced regions of the tube neck, one field character being such that it oppositely intersects the respective outer beam paths while having negligible magnitude in the central beam vicinity, and the other field character being such that it intersects with similar direction the respective outer beam paths while also having negligible magnitude in the central beam vicinity.
  • quadripolar (four-pole) magnet structures are employed for field'establishment of the firstnamed (differential effect on outer" beams) character, while sextipolar (six-pole) magnet structures are employedfor field establishment of the secondnamed (common effect on outer beams) character.
  • Adjustably positioned PM (permanent magnet) structures and adjustably energized EM (electromagnet) structures are both feasible for realization of the fourpole and six-pole magnet systems.
  • a pair of juxtaposed four-pole magnet rings and a pair of juxtaposed six-pole magnet rings are rotatably mounted about axially spaced regions of the tube neck (free of the presence of internal magnetizable structures).
  • Each of the four-pole rings has four poles symmetrically positioned about the ring periphery and alternating in polarity; i.e., with reference to a given north pole loca- -99". thets l in fl q s oqetiqn Nl and S270.
  • Each of the six-pole rings has six poles symmetrically positioned about the ring periphery and alternating in polarity; i.e., with reference to a given north pole location thereon, the remaining pole locations are: S-60; N-l20; S-l80; N240; and S800 Conjoint rotation of the rings of a pair alters the direction of the resultant beam shifts, while differential rotation of the rings of a pair alters the beam shift magnitude.
  • an additional pair of rotatable magnet rings may conveniently be supported on a common mount with the other ring pairs, the additional ring pair providing a facility for commonly shifting all three beams for conventional purity correction purposes. While the precise locations of the respective ring pairs along the tube neck axis to the rear of the, deflection yoke does not appear to be critical, an order of locations which places the six-pole ring pair centrally, with the four-pole rings to the fore and the two-pole rings. to the rear, appears-advantageous for readily obtaining adequate adjustment sensitivity for all of the desired Qfields other location orders, however, are recognized as being feasible.
  • realization of the desired four-pole and sixpole magnet systems is effected by employment of low permeability magnetic material (such as barium ferrite) to minimize disturbance of, or other interaction with, the deflection yoke field.
  • low permeability magnetic material such as barium ferrite
  • the design of the color kinescope and associated deflection yoke are such as to substantially maintain (i.e., within tolerances acceptable to an average viewer) the center-of-screen convergence conditions throughout the scanning of a raster.
  • the described arrangements of the present invention are particularly suitable for such application by providing means for readily obtaining accurate center-ofscreen convergence with structures suffering little or no interference from fringe yoke fields, and, in turn, causing little or no disturbance to the formation of precision yoke fields suitable for convergence maintenance.
  • the array of two-pole, six-pole and four-pole magnet ring pairs constitute the only neck components (exclusive of the deflection yoke apparatus) required in set-up and operation of the color kinescope.
  • An object of the present invention is to provide novel magnet arrangements for adjusting beam positions in plural beam cathode ray tubes.
  • FIG. 1 is a side elevation view of a color kinescope assembly incorporating PM-type beam position adjusting apparatus in accordance with an embodiment of the present invention
  • FIG. 2 is a sectional view along the line 2-2 of FIG. 1, simplified to omit a showing of structure within the kinesco'pe neck;
  • FIG. 3 is an exploded perspective view of several magnet ring elements of the beam position adjusting apparatus of FIG. 1; s
  • FIGS. 4a, 4b and 4c are diagrammatic showings illustrating various directions of beam position shifts obtainable with various rotational positions of four-pole magnet ring elements of the FIG. 1 apparatus;
  • FIGS. 5a, 5b and 5c are diagrammatic showings illustrating various directions of beam position shifts obtainabl with various rotational positions of six-pole magnet ring elements of the FIG. 1 apparatus;
  • FIGS. 6a, 6b and 6c and diagrammatic showings illustrating various directions of beam position shifts obtainable with various rotational positions of two-pole magnet ring elements of the FIG. 1 apparatus;
  • FIGS. 7a and 7b are further diagrammatic showings, illustrating how differential rotation of four-pole magnet ring elements from their FIG. 4a positions affects beam shift magnitude;
  • FIGS. 8a and 8b diagrammatically illustrate fourpole electromagnet structures that may be employed pursuant to an EM modification of the FIG. 1 embodiment of the present invention.
  • an in-line, tribeam, shadow-mask color kinescope 20 having at its base end a cylindrical neck section 21 and at its viewing end a funnel-portion 23, is illustrated in assembly with associated external neck components.
  • the latter include deflection yoke apparatus 27 (not shown in detail) encircling the forward end of the kinescope neck 21 an an adjoining flared portion of the funnel section 23.
  • each ring is formed with a pair of projecting tabs (e.g., 51B, 528) to facilitate manual adjustment of the rotational position of the ring about the support 70. Details of the internal structure of the kinescope neck have not been shown in the sectional view of FIG.
  • nominal beam axis locations I, II and Ill have been shown within the tube neck to indicate the in-line configuration of the beam paths; the central beam axis II is shown as substantially coincident with the tube neck axis.
  • the interior of the tube neck 21 encircled by the magnet rings is free of magnetic pole pieces or other magnetizable structures.
  • the ,inner diameter of support 70 is of sufficient width to permit the support to slide over the tube neck 21.
  • a clamping strap 80 provides means for securing the support 70 in a desired fixed position on he neck 21.
  • Axially'spaced (nonmagnetic) positioning rings 60 suitably secured to the support 70, establish a trio of appropriately spaced gaps along the length of the support 70 for occupancy by the rotatable rings in respective pairs-(30A 3013; 40A, 40B; and 50A, 5013).
  • Thin washers (not illustrated) of suitable material (e.g., paper.) may be provided between the. rings of each pair to facilitate independent ring rotation.
  • each of the rings 30A, 30B of the rearmost pair has a two-pole magnetization pattern in which a north pole location is diametrically opposed to a south pole location.
  • Each of the rings 40A, 40B of the central pair has a six-pole magnetization pattern, with the poles equally spaced (at intervals) about the ring periphery and alternating inpolarity.
  • Each of the rings 50A, 50B of the forwardmost pair has a four-pole magnetizationpattem, with the; poles equally spaced (at 90 intervals) about the ring periphery and alternating in polarity.
  • FIG. 4a illustrates the nature of the beam position shifts that result from the fields of the four-pole ring pair (50A, 508) for a particular orientation thereof.
  • ring 50A is positioned with its north poles-directly above and below the axial beam location II; ring 508 is similarly positioned (whereby the fields of the two rings are similarly directed, and are fully aiding).
  • the field at beam location I is laterally directed with apolarity producing a downward shift of the electron beam at location I (electron motion being into the plane of the paper in the views of FIGS. 4a, et seq.)
  • the field at beam location [I] is also laterally directed but withoppositepolarity, producing an upward shift of the electron beam at location III.
  • FIG. 4b illustrates that rings 50A and 508 have both been rotated 45 counterclockwise from their FIG. positions.
  • the field direction at location I is vertically downward while the field direction at location III is vertically upward; the resultant beam position shifts are laterally rightward at location I and laterally leftward at locationlll.
  • FIG. 4c illustrates that a further counterclockwise rotation (of approximately 22.5") of both rings results in opposite diagonally directed beam position shifts (upward and any of FIGS. 40, 41) or 40. This follows from the fact that the central region of the aperture of the four-pole rings is substantially field free, whereby a beam at the axial location II is substantially unaffected by the fourpole rings no matter what their orientation may be.
  • FIG. 5a illustrates the nature of the beam position shifts that result from the fields of the six-pole ring pair (40A, 403) for a particular orientation thereof.
  • ring 40A is positioned with a pair of diametrically opposed poles in horizontal alignment with in-line locations I, II and III, the north pole of the pair being adjacent location I; ring 40B is similarly positioned.
  • the field direction at location I is lateral with a polarity producing an upward shift of an electron beam at location I;
  • the field direction at location III is also lateral and with like polarity, this also producing an upward shift of an electron beam at location Ill.
  • FIG. 5b illustrates that a 30 counterclockwise rotation of rings 40A and 408 from their FIG. 5a positions results in laterally leftward shifts at both of the locations I and III.
  • FIG. 50 illustrates that a smaller degree of counterclockwise rotation results in like diagonally directed shifts at locations I and Ill.
  • rings 40A, 40B thus constitutes a facility for introducing, in any required direction, equal-and-common shifts of the outer beams of an inline trio without disturbing the central, reference beam.
  • the two-pole rings 30A and 308 have an effect on all three beams. This is illustrated in FIG. 6a where common-lateral shifts of all three beam's result from a vertical orientation of the poles of the two-pole rings, in FIG. 6b where common vertical shifts of all three beams result from a lateral orientation of the poles of the two-pole rings, and in FIG. 6c where common diagonal shifts of all three beams result from a diagonal orientation of the poles of the two-pole rings.
  • the bipolar field provided by the two-pole rings 30A and 30B constitutes a facility for adjusting the angles of approach of the trio to the kinescopes shadowmask to ensure landing of each on the appropriate phosphor area (i.e., to establish optimum purity).
  • FIGS. 7a and 7b illustrate how relative rotation of the rings of a pair away from direct alignment introduces a reduction of the magnitude of the associated beam shift effects.
  • Chosen for illustration purposes are the four-pole rings 50A and 508.
  • the four-pole ring 50A has been rotated l5 clockwise from its FIG. 4a position, while the four-pole ring 508 has been rotated 15 counterclockwise from its FIG. 4a position.
  • the beam shift directions at locations I and III are the same as in FIG. 4a but the beam shift magnitudes are both reduced.
  • This magnitude reduction effect accompanying the spreading" of the magnet rings of a like pair will be familiar to those acquainted with the use of prior art purity ring pairs or centering ring pairs, and should not require further. explanation herein.
  • FIGS. 8a and 8b respectively illustrate a pair of four-pole EM ring structures, 50A and 508', each having four coils symmetrically positioned about its periphery, with adjacent coils oppositely wound.
  • Ring 50A as shown in FIG. 8a, is fixedly positioned with its poles in the orientation of FIG. 4a to introduce oppositely directed vertical shifts at locations I and III.
  • Ring 508, as shown in FIG. 8b is fixedly positioned with its poles in the orientation of FIG. 4b to introduce oppositely directed lateral shifts at locations I and III.
  • the illustrated order for the respective bipolar, sextipolar and guadripolar fields is preferred, placing the sextipolar field centrally to maximize its effectiveness. It may also be noted that there is a concomitant preferred order of field adjustment to minimize retouching requirements.
  • the bipolar field is adjusted first to optimize purity, establishing the: position v of the reference beam.
  • the sextipolar field is adjusted to provide the required common shifts of the outer beams relative to the axial beam.
  • the quadripolarfield is adjusted to providethe required opposing shifts of the outer beams, necessary to achieve final registry.
  • Such order of adjustment (in the order of location along the beam path) has the advantage that a given field adjustment does not substantially alter the beam locations in the region of a previously adjusted field.
  • a low permeability material such as barium ferrite
  • barium ferrite may be used in forming the several magnet rings of the FIG. 1 assembly to minimize undesired interactions between the deflection field and the convergence and purity fields.
  • this precaution may readily be omitted in the case of the purity rings; i.e., a more inexpensive material, such as a suitable steel, may be used for the purity rings 30A, 308 with little adverse consequence.
  • a tri-beam color kinescope having a cylindrical neck enclosing a trio of in-line beam paths, a central one i of said in-line beam paths substantially coinciding with the longitudinal axis of said neck with the remaining outer ones of said in-line beam paths being substantially symmetrically disposed on opposite sides of said axis, and with all of said in-line beam paths traversing a region of the interior of said neck which is free of magnetizable structures; first adjustable magnetic field producing means mounted on said neck for causing mutually opposing shifts of said outer beam paths in said region without substantially disturbing said central beam path; and
  • a second adjustable magnetic field producing means mounted on said neck for causing like direction shifts of said outer beam paths in said region without substantially disturbing said central beam path.
  • said second field producing means comprises means for developing a sextipolar field pattern in said region.
  • said quadripolar field pattern developing means comprises a pair of four-pole magnet rings encircling a portion of said region;
  • said sextipolar field pattern developing means comprises a pair of six-pole magnet rings encircling a second portion of said region axially spaced from said first-named region.
  • an in-line, tri-beam, shadow-mask color kinescope having a cylindrical neck, a region of the'interior of said neck being substantially free of magnetizable structures;
  • said ring pairs being mounted for rotation concentrically about said support at respective longitudinally spaced locations on said support.
  • Apparatus in accordance with claim 5 also including a deflection yoke mounted on said neck, said fourpole magnet rings being mounted on said support in a' location adjacent to said defection yoke, said two-pole beiri substantial lg symmetrically disposed on opposi e sides of 5a: axis, and with all of said in-lme beam paths traversing a region of the interior of said neck which is free of magnetizable structures;
  • a pair of six-pole magnet rings rotatably mounted'on said neck, in axially spaced relation to said first named pair, for causinglike direction shifts of said outer beam paths said region without substantially disturbing said central beam path.
  • tri-beam, shadow-mask color kinescope comprising:

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US00217757A 1972-01-14 1972-01-14 Magnetic beam adjusting arrangements Expired - Lifetime US3725831A (en)

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JP (1) JPS5145936B2 (de)
KR (1) KR780000414B1 (de)
AR (1) AR194981A1 (de)
AT (1) AT351085B (de)
BE (1) BE793991A (de)
BR (1) BR7300151D0 (de)
CA (1) CA968400A (de)
CH (1) CH559996A5 (de)
DD (1) DD102510A5 (de)
DE (1) DE2226335C3 (de)
DK (1) DK144780C (de)
EG (1) EG10765A (de)
ES (1) ES410400A1 (de)
FI (1) FI57332C (de)
FR (1) FR2167968B1 (de)
GB (1) GB1391798A (de)
HK (1) HK36476A (de)
HU (1) HU178696B (de)
IE (1) IE37057B1 (de)
IL (1) IL41178A (de)
IT (1) IT973257B (de)
MY (1) MY7600213A (de)
NL (1) NL178547C (de)
NO (1) NO135806C (de)
PL (1) PL82170B1 (de)
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SE (1) SE381371B (de)
SU (1) SU1159492A3 (de)
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Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3793602A (en) * 1973-04-13 1974-02-19 Gen Electric Convergence device for short neck in-line cathode ray tube
US3808570A (en) * 1972-03-20 1974-04-30 Rca Corp Static convergence device for electron beams
JPS49126222A (de) * 1973-04-04 1974-12-03
JPS49128629A (de) * 1973-04-09 1974-12-10
JPS5046443A (de) * 1973-08-30 1975-04-25
JPS5057725A (de) * 1973-09-14 1975-05-20
US3913043A (en) * 1973-10-10 1975-10-14 Philips Corp Deflection device for a color television display tube
US4114124A (en) * 1976-06-25 1978-09-12 Matsushita Electric Industrial Co., Ltd. Convergence apparatus with variably magnetized magnets
FR2389225A1 (fr) * 1977-04-25 1978-11-24 Rca Corp Dispositif de convergence statique comportant un correcteur magnetique
FR2397064A1 (fr) * 1977-07-06 1979-02-02 Philips Nv Procede pour la realisation d'un tube d'images en couleur et tube ainsi realise
US4261017A (en) * 1979-12-27 1981-04-07 Rca Corporation Electron beam influencing apparatus
US4310819A (en) * 1979-05-17 1982-01-12 Sanyo Electric Co., Ltd. Magnetic beam adjusting arrangement
DE3209767A1 (de) * 1981-03-17 1982-11-11 RCA Corp., 10020 New York, N.Y. Verfahren und vorrichtung zur beeinflussung der bewegung von elektronenstrahlen
DE3225633A1 (de) * 1981-07-10 1983-03-17 RCA Corp., 10020 New York, N.Y. Geraet zur wiedergabe von farbbildern
DE3235614A1 (de) * 1981-09-25 1983-04-14 Denki Onkyo Co., Ltd., Tokyo Konvergenzeinrichtung fuer farbkathodenstrahlroehren
FR2541041A1 (fr) * 1983-02-14 1984-08-17 Sony Corp Tube cathodique a deux faisceaux
DE3633070A1 (de) * 1985-09-30 1987-04-09 Rca Corp Rasterkorrektur fuer randkonvergenzfehler
US4670726A (en) * 1984-12-20 1987-06-02 Hitachi Metals, Ltd. Convergence device for electron beams in color picture tube
US4823100A (en) * 1985-07-31 1989-04-18 Rca Licensing Corporation Deflection distortion correction device
US5028898A (en) * 1988-08-24 1991-07-02 Hitachi, Ltd. Color cathode-ray tube having deflection yoke
EP0507383A1 (de) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Farbbildröhrensystem
EP0517320A2 (de) * 1991-06-05 1992-12-09 Koninklijke Philips Electronics N.V. Farbbildröhre mit Coma-Korrektur
US5399933A (en) * 1993-05-20 1995-03-21 Chunghwa Picture Tubes, Ltd. Magnetic beam adjusting rings with different thickness
US5485054A (en) * 1992-10-09 1996-01-16 U.S. Philips Corporation Display tube having a deflection coil support and an auxiliary deflection coil support
EP0507382B1 (de) * 1991-04-02 1996-08-21 Koninklijke Philips Electronics N.V. Farbbildröhre mit verringertem Fleckwachstum
EP0843333A2 (de) * 1996-11-14 1998-05-20 Hitachi, Ltd. Mit einer Justiervorrichtung, zur Konvergierung eines Strahlenbündels versehene Farbkathodenstrahlröhre
US5801496A (en) * 1995-08-09 1998-09-01 Mitsubishi Denki Kabushiki Kaisha Color cathode ray tube display device and method of adjusting color purity in the display device
EP0892421A1 (de) * 1997-07-15 1999-01-20 Hitachi, Ltd. Farbkathodenstrahlröhre

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JPS5076728U (de) * 1973-11-16 1975-07-03
JPS5156920U (de) * 1974-10-29 1976-05-04
NL7414845A (nl) * 1974-11-14 1976-05-18 Philips Nv Inrichting voor het weergeven van kleurentelevi- siebeelden.
JPS51144524A (en) * 1975-06-06 1976-12-11 Matsushita Electric Ind Co Ltd Convergence device
IT1050924B (it) 1975-11-21 1981-03-20 Indesit Dispositivo per la regolazione dei fasci elettronici di un cinescopio
DE2612607C3 (de) * 1976-03-25 1984-01-12 Philips Patentverwaltung Gmbh, 2000 Hamburg Statische Konvergenzkorrekturvorrichtung in Farbfernsehbildwiedergaberöhren
NL7812540A (nl) * 1978-12-27 1980-07-01 Philips Nv Kathodestraalbuis.
JPS60177450U (ja) * 1984-05-02 1985-11-25 日本電気株式会社 陰極線管

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US3332046A (en) * 1965-05-19 1967-07-18 Illinois Tool Works Blue lateral and purity magnet assembly
US3375389A (en) * 1965-03-15 1968-03-26 Rca Corp Adjustable convergence magnets
US3508181A (en) * 1968-01-31 1970-04-21 Illinois Tool Works Blue lateral magnet assembly

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US3375389A (en) * 1965-03-15 1968-03-26 Rca Corp Adjustable convergence magnets
US3332046A (en) * 1965-05-19 1967-07-18 Illinois Tool Works Blue lateral and purity magnet assembly
US3508181A (en) * 1968-01-31 1970-04-21 Illinois Tool Works Blue lateral magnet assembly

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3808570A (en) * 1972-03-20 1974-04-30 Rca Corp Static convergence device for electron beams
JPS49126222A (de) * 1973-04-04 1974-12-03
JPS49128629A (de) * 1973-04-09 1974-12-10
US3793602A (en) * 1973-04-13 1974-02-19 Gen Electric Convergence device for short neck in-line cathode ray tube
JPS5046443A (de) * 1973-08-30 1975-04-25
JPS5615103B2 (de) * 1973-09-14 1981-04-08
US3898597A (en) * 1973-09-14 1975-08-05 Philips Corp Pairs of oppositely rotatable ring magnets for a color television display device
JPS5057725A (de) * 1973-09-14 1975-05-20
US3913043A (en) * 1973-10-10 1975-10-14 Philips Corp Deflection device for a color television display tube
US4114124A (en) * 1976-06-25 1978-09-12 Matsushita Electric Industrial Co., Ltd. Convergence apparatus with variably magnetized magnets
FR2389225A1 (fr) * 1977-04-25 1978-11-24 Rca Corp Dispositif de convergence statique comportant un correcteur magnetique
FR2397064A1 (fr) * 1977-07-06 1979-02-02 Philips Nv Procede pour la realisation d'un tube d'images en couleur et tube ainsi realise
US4310819A (en) * 1979-05-17 1982-01-12 Sanyo Electric Co., Ltd. Magnetic beam adjusting arrangement
US4261017A (en) * 1979-12-27 1981-04-07 Rca Corporation Electron beam influencing apparatus
DE3209767A1 (de) * 1981-03-17 1982-11-11 RCA Corp., 10020 New York, N.Y. Verfahren und vorrichtung zur beeinflussung der bewegung von elektronenstrahlen
DE3225633A1 (de) * 1981-07-10 1983-03-17 RCA Corp., 10020 New York, N.Y. Geraet zur wiedergabe von farbbildern
DE3235614A1 (de) * 1981-09-25 1983-04-14 Denki Onkyo Co., Ltd., Tokyo Konvergenzeinrichtung fuer farbkathodenstrahlroehren
FR2541041A1 (fr) * 1983-02-14 1984-08-17 Sony Corp Tube cathodique a deux faisceaux
US4670726A (en) * 1984-12-20 1987-06-02 Hitachi Metals, Ltd. Convergence device for electron beams in color picture tube
US4823100A (en) * 1985-07-31 1989-04-18 Rca Licensing Corporation Deflection distortion correction device
DE3633070A1 (de) * 1985-09-30 1987-04-09 Rca Corp Rasterkorrektur fuer randkonvergenzfehler
US5028898A (en) * 1988-08-24 1991-07-02 Hitachi, Ltd. Color cathode-ray tube having deflection yoke
EP0507382B1 (de) * 1991-04-02 1996-08-21 Koninklijke Philips Electronics N.V. Farbbildröhre mit verringertem Fleckwachstum
EP0507383A1 (de) * 1991-04-04 1992-10-07 Koninklijke Philips Electronics N.V. Farbbildröhrensystem
US5196768A (en) * 1991-04-04 1993-03-23 U.S. Philips Corporation Color display tube system
EP0517320A3 (en) * 1991-06-05 1993-11-18 Philips Nv Colour display tube with coma correction
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US6194823B1 (en) 1997-07-15 2001-02-27 Hitachi, Ltd. Color cathode ray tube having adjustment magnet assembly at the neck portion of the tube
US6335589B2 (en) 1997-07-15 2002-01-01 Hitachi, Ltd. Color cathode ray tube having adjustment magnet assembly at neck portion

Also Published As

Publication number Publication date
ATA32373A (de) 1978-12-15
IT973257B (it) 1974-06-10
FI57332B (fi) 1980-03-31
DE2226335C3 (de) 1975-12-11
IL41178A (en) 1975-08-31
EG10765A (en) 1976-10-31
IL41178A0 (en) 1973-02-28
ZA73214B (en) 1973-10-31
DE2226335B2 (de) 1975-05-15
SE381371B (sv) 1975-12-01
FI57332C (fi) 1980-07-10
DE2226335A1 (de) 1973-07-19
HU178696B (en) 1982-06-28
RO64019A (fr) 1978-12-15
CA968400A (en) 1975-05-27
NO135806B (de) 1977-02-21
MY7600213A (en) 1976-12-31
FR2167968B1 (de) 1976-05-14
GB1391798A (en) 1975-04-23
JPS5145936B2 (de) 1976-12-06
PL82170B1 (de) 1975-10-31
TR17497A (tr) 1975-07-23
KR780000414B1 (en) 1978-10-10
FR2167968A1 (de) 1973-08-24
YU36580B (en) 1984-02-29
NO135806C (de) 1977-06-08
AT351085B (de) 1979-07-10
NL178547C (nl) 1986-04-01
JPS4882731A (de) 1973-11-05
AR194981A1 (es) 1973-08-30
CH559996A5 (de) 1975-03-14
BE793991A (fr) 1973-05-02
NL178547B (nl) 1985-11-01
NL7300496A (de) 1973-07-17
IE37057B1 (en) 1977-04-27
IE37057L (en) 1973-07-14
YU9273A (en) 1982-02-25
HK36476A (en) 1976-06-25
DK144780B (da) 1982-06-01
DD102510A5 (de) 1973-12-12
BR7300151D0 (pt) 1973-09-27
ES410400A1 (es) 1975-12-01
DK144780C (da) 1982-10-25
SU1159492A3 (ru) 1985-05-30

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