US3191104A - Deflection system for television receivers - Google Patents

Deflection system for television receivers Download PDF

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Publication number
US3191104A
US3191104A US153811A US15381161A US3191104A US 3191104 A US3191104 A US 3191104A US 153811 A US153811 A US 153811A US 15381161 A US15381161 A US 15381161A US 3191104 A US3191104 A US 3191104A
Authority
US
United States
Prior art keywords
annular
hood
deflection coil
magnets
television receivers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US153811A
Other languages
English (en)
Inventor
Mak Gerrit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU66677/60A external-priority patent/AU248983B2/en
Application filed by US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3191104A publication Critical patent/US3191104A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • H01J29/82—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
    • H01J29/823—Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements around the neck of the tube
    • H01J29/826—Deflection arrangements

Definitions

  • the cap at least partly from molding material including permanently magnetizable material. Certain parts of the cap may be magnetized by means of a suitable electro-magnet and are thus capable of fulfilling the function of correction magnets.
  • FIG. 1 shows a deflection coil system in a perspective view from the rear of known construction, in which the invention can be carried out;
  • FIG. 2 shows the deflection coil system of the invention.
  • FIG. 1 show an essentially truncated-coneshaped, hood of synthetic resin open at both ends, in which a deflection coil system of known structure (for the sake of clarity this is not shown) for the deflection of the electron beam in a television display tube is arranged.
  • the front end of the hood 1 Le. the end facing the image screen of the display tube (not shown) from behind has arranged in its neighborhood a number of rod-shaped correction magnets 3 and two cylindrical, rotatable magnets 7, provided with pole shoes 5.
  • one or more of these magnets may be replaced by annular zone 9 near the edge of the hood 1, in which zone the hood is made "ice of molded material which contains permanent-magnetizable material i.e. particles having a high coercive force, for example ceramic material such as barium ferrite, preferably in the form of a powdery filler.
  • Discrete parts of this annulus can be magnetized by means of a suitable electro-magnet by arranging the poles thereof on the said zone and passing through the magnet a strong current pulse. The parts thus magnetized can fulfill the function of correction magnets.
  • the location of the magnetized zones as shown in FIG.
  • the magnetizations may be erased and be replaced by magnetizations at other places and so on, until the desired correction of the raster appearing on the display tube is obtained. Owing to the possibility of varying the magnetization of the annulus 9 no magnets need be employed which have to be fastened to the screening hood 1 so as to be mechanically adjustable, so that the structure may be made inexpensively.
  • a screening hood of insulating molding material comprising a generally truncated conical portion for housing deflection coils and an annular marginal portion, said annular marginal portion having a dispersion of permanent magnetizable powder of high coercive force whereby discrete areas of said annular portion may be permanently magnetized for image correction,
  • a deflection coil system for television display tubes a screening hood of insulating molding material, said screennig hood comprising a generally truncated conical portion for housing a deflection coil and an annular marginal portion, said annular marginal portion containing a filler of powdered permanently magnetizable material of barium ferrite whereby discrete areas of said annular portion may be permanently magnetized for image correction.

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  • Video Image Reproduction Devices For Color Tv Systems (AREA)
US153811A 1960-11-17 1961-11-21 Deflection system for television receivers Expired - Lifetime US3191104A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU66677/60A AU248983B2 (en) 1960-11-17 Method and means for correcting raster distortion ina cathode ray tube
AU6667761 1961-11-01

Publications (1)

Publication Number Publication Date
US3191104A true US3191104A (en) 1965-06-22

Family

ID=25635182

Family Applications (1)

Application Number Title Priority Date Filing Date
US153811A Expired - Lifetime US3191104A (en) 1960-11-17 1961-11-21 Deflection system for television receivers

Country Status (3)

Country Link
US (1) US3191104A (de)
DE (1) DE1191496B (de)
GB (1) GB927025A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292176B (de) * 1968-01-25 1969-04-10 Gerhard Walter Spulensystem fuer die Ablenkung von Elektronenstrahlen in Farbfernsehroehren
US3516038A (en) * 1967-05-22 1970-06-02 Matsushita Electric Ind Co Ltd Convergence device
US3857057A (en) * 1971-12-22 1974-12-24 Philips Corp Colour television display apparatus provided with a picture display tube with electron beams generated in one plane
US4105983A (en) * 1975-04-01 1978-08-08 U.S. Philips Corporation Static convergence unit, and a color display tube comprising a convergence unit having permanent magnets
DE2832668A1 (de) * 1977-07-26 1979-02-08 Rca Corp Verfahren und einrichtung zum einstellen der farbreinheit einer in-line- farbfernsehbildroehre
US4490703A (en) * 1982-07-28 1984-12-25 Ball Corporation Multipole magnet for electron beam correction
FR2552263A1 (fr) * 1983-09-21 1985-03-22 Philips Nv Unite de deviation electromagnetique et tube en couleurs muni d'une telle unite de deviation
US5550522A (en) * 1993-11-09 1996-08-27 U.S. Phillips Corporation Deflection unit having a ring with field correction elements, and cathode ray tube provided with said unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4823100A (en) * 1985-07-31 1989-04-18 Rca Licensing Corporation Deflection distortion correction device
CA1269694A (en) * 1985-07-31 1990-05-29 Paul Michael Bruey Deflection distortion correction device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717232A (en) * 1950-05-13 1955-09-06 Ruetgerswerke Ag Dehydration and fractionation of crude pyridine
FR1239287A (fr) * 1958-10-31 1960-08-19 Philips Nv Système de bobines de déviation pour tube d'image de télévision
US2963609A (en) * 1957-11-20 1960-12-06 Philco Corp Beam centering and deflection correction means for cathode ray tubes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1774923U (de) * 1958-07-04 1958-10-02 Hermann Holtz Magnetisch haftendes markierungszeichen.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2717232A (en) * 1950-05-13 1955-09-06 Ruetgerswerke Ag Dehydration and fractionation of crude pyridine
US2963609A (en) * 1957-11-20 1960-12-06 Philco Corp Beam centering and deflection correction means for cathode ray tubes
FR1239287A (fr) * 1958-10-31 1960-08-19 Philips Nv Système de bobines de déviation pour tube d'image de télévision

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3516038A (en) * 1967-05-22 1970-06-02 Matsushita Electric Ind Co Ltd Convergence device
DE1292176B (de) * 1968-01-25 1969-04-10 Gerhard Walter Spulensystem fuer die Ablenkung von Elektronenstrahlen in Farbfernsehroehren
US3857057A (en) * 1971-12-22 1974-12-24 Philips Corp Colour television display apparatus provided with a picture display tube with electron beams generated in one plane
US4105983A (en) * 1975-04-01 1978-08-08 U.S. Philips Corporation Static convergence unit, and a color display tube comprising a convergence unit having permanent magnets
DE2832668A1 (de) * 1977-07-26 1979-02-08 Rca Corp Verfahren und einrichtung zum einstellen der farbreinheit einer in-line- farbfernsehbildroehre
US4490703A (en) * 1982-07-28 1984-12-25 Ball Corporation Multipole magnet for electron beam correction
FR2552263A1 (fr) * 1983-09-21 1985-03-22 Philips Nv Unite de deviation electromagnetique et tube en couleurs muni d'une telle unite de deviation
DE3433378A1 (de) * 1983-09-21 1985-04-11 N.V. Philips' Gloeilampenfabrieken, Eindhoven Elektromagnetische ablenkeinheit und farbfernsehbildroehre mit einer derartigen ablenkeinheit
GB2147143A (en) * 1983-09-21 1985-05-01 Philips Nv Electromagnetic deflection unit for a colour display tube
US4535313A (en) * 1983-09-21 1985-08-13 U.S. Philips Corporation Electromagnetic deflection unit and color display tube provided with such a unit
US5550522A (en) * 1993-11-09 1996-08-27 U.S. Phillips Corporation Deflection unit having a ring with field correction elements, and cathode ray tube provided with said unit

Also Published As

Publication number Publication date
DE1191496B (de) 1965-04-22
GB927025A (en) 1963-05-22

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