EP0117518B1 - Unité de déviation pour tube-image - Google Patents

Unité de déviation pour tube-image Download PDF

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Publication number
EP0117518B1
EP0117518B1 EP84101825A EP84101825A EP0117518B1 EP 0117518 B1 EP0117518 B1 EP 0117518B1 EP 84101825 A EP84101825 A EP 84101825A EP 84101825 A EP84101825 A EP 84101825A EP 0117518 B1 EP0117518 B1 EP 0117518B1
Authority
EP
European Patent Office
Prior art keywords
winding
deflection
core
windings
wound
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
Application number
EP84101825A
Other languages
German (de)
English (en)
Other versions
EP0117518A1 (fr
Inventor
Ulrich Hafner
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.)
Panasonic Holdings Corp
Original Assignee
Alcatel SEL AG
Standard Elektrik Lorenz AG
Alcatel NV
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
Application filed by Alcatel SEL AG, Standard Elektrik Lorenz AG, Alcatel NV filed Critical Alcatel SEL AG
Publication of EP0117518A1 publication Critical patent/EP0117518A1/fr
Application granted granted Critical
Publication of EP0117518B1 publication Critical patent/EP0117518B1/fr
Expired 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
    • H01J29/72—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

  • the invention relates to a deflection unit for picture tubes with a core made of soft magnetic material and at least two windings, if necessary consisting of several layers, in which, adjacent to an outer surface of the core, at least three projections are provided to form deflection points for the winding wire, one projection each is provided at the ends and another protrusion in the middle of each winding.
  • Such deflection units are known from DE-A-2 842 528, which corresponds to US-A-4 128 824.
  • Different types of picture tube deflection units are in use; on the one hand those in which both the deflection coils for the vertical (image) deflection and those for the horizontal (line) deflection are wound on toroidal cores made of soft magnetic material. These deflection units are also called toroidal deflection units.
  • Deflection units are also known in which the deflection coils for the vertical (image) deflection are designed as a toroidal winding and the deflection coils for the horizontal (line) deflection consist of two saddle coils. These deflection units are also called semi-toroidal deflection units.
  • the invention relates to the deflection coils designed as a toroidal winding.
  • the vertical deflection field for image deflection is generated by a toroidal winding.
  • the toroid itself consists of two symmetrical halves, on each of which a winding, if necessary consisting of several layers, is wound.
  • the toroidal winding generating the vertical deflection field also has the task of generating a pillow-shaped or barrel-shaped magnetic field profile, with which the distortion errors occurring in the deflection of the electron beams in the east-west direction can be compensated.
  • the windings producing the vertical deflection field are wound onto the ring core halves in such a way that the winding begins at one end of the ring core half and is wound up to the other end of the ring core half.
  • at least three projections for forming deflection points for the winding wire are provided adjacent to an outer surface of the core, one projection being provided at the ends and another projection in the middle of each winding.
  • the winding density can be inhomogeneous in the known windings, but the winding wires are always parallel to the longitudinal axis of the picture tube. With such an arrangement of the windings, however, only magnetic fields can be generated which have either a pillow-shaped or barrel-shaped field distortion.
  • deflection units are required which generate magnetic fields to compensate for the distortion errors, which at the rear end of the deflection unit facing the electron beam generating system has a strong barrel-shaped distortion and at the front facing the screen End of the deflection unit have a weak barrel-shaped or a pillow-shaped distortion of the magnetic field.
  • Deflection units are already in use in which such a field profile is generated in that the windings are arranged obliquely on the halves of the toroid, i.e. the winding wires running in the direction of the longitudinal axis of the tube enclose an acute angle with the plane running through the longitudinal axis of the tube.
  • the windings are wound on the toroidal halves parallel or obliquely to the longitudinal axis of the tube, in any case it is important for the production of good dynamic convergence and freedom from distortion of the grid in a color television tube that the windings are quadrant-symmetrical, i.e. the windings arranged in the four quadrants of the toroidal core are symmetrical to one another.
  • Each winding of this unit consists of two symmetrical to the plane of symmetry running through the longitudinal axis of the tube Halves of the winding, each wound from the center of the winding to the sides.
  • a crossed winding wire guide is used.
  • the invention is therefore based on the object of providing a deflection unit for picture tubes with toroidal windings wound on the core, with which the required quadrant-symmetrical magnetic fields can be generated even without any winding-like auxiliary means for the windings.
  • each winding consists of two winding halves which are arranged symmetrically to a plane running through the longitudinal axis of the tube and each of which is wound from the center of the winding to the sides and each winding start and winding end of the winding halves lie on the edge of the core with the larger diameter.
  • Such a winding ensures that the deflection unit containing it generates the required symmetrical magnetic fields. It is also achieved that a simple and quick winding can be done. If shifts of windings or winding parts occur when winding the windings according to the invention, the effects are not so harmful because the windings are quadrant-symmetrical and therefore the possible errors are also symmetrical.
  • the proposed solution can also be improved in that the surface of the core is provided with a coating which increases the adhesion of the winding wire.
  • the ring core 1 is formed in two parts in a known manner, and a strip 2 made of non-magnetizable material with the projections 3 is attached to the edge of the ring core with the larger diameter.
  • the winding on each ring core half 1 is divided into two winding halves, which lie symmetrically to an (imaginary) plane 4 through the longitudinal axis 5 of the picture tube. Since the exemplary embodiment shown is supposed to be an obliquely wound winding, the individual windings with plane 4 enclose an acute angle, as is clear from FIG. the deflection point 6 of the winding wire at the rear end of the deflection unit is closer to the plane 4 than the deflection point 7 at the front end of the deflection unit.
  • the start of the winding wire A is placed around the projection 3 at the right end of the ring core half 1. Then the winding wire is led around the projection 3 in the middle and the left half of the winding is wound. At the winding end of the left half of the winding, the winding wire is first passed around the projection 3 at the left end and then around the projection 3 in the middle of the toroid half 1 before the right winding half is wound.

Claims (2)

1. Unité de déviation pour tube image, comprenant un noyau de matériau magnétique doux et au moins deux enroulements qui, si nécessaire, consistent en plusieurs couches, dans laquelle, près d'une surface extérieure du noyau, il est prévu au moins trois saillies pour former des points de changement de direction du fil de l'enroulement, une saillie étant prévue à chacune des extrémités et une saillie additionnelle au centre de chaque enroulement, caractérisé en ce que chaque enroulement consiste en deux moitiés d'enroulement symétriques par rapport à un plan (4) s'étendant par l'axe longitudinal (5) du tube, chacune de ces moitiés étant enroulée vers les côtés en partant du centre de l'enroulement.
2. Unité de déviation conforme à la revendivation 1, caractérisée en ce que la surface dudit noyau (1) est pourvue d'un revêtement augmentant l'adhérence du fil de l'enroulement.
EP84101825A 1983-02-24 1984-02-22 Unité de déviation pour tube-image Expired EP0117518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833306385 DE3306385A1 (de) 1983-02-24 1983-02-24 Ablenkeinheit fuer bildroehren
DE3306385 1983-02-24

Publications (2)

Publication Number Publication Date
EP0117518A1 EP0117518A1 (fr) 1984-09-05
EP0117518B1 true EP0117518B1 (fr) 1988-05-18

Family

ID=6191666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101825A Expired EP0117518B1 (fr) 1983-02-24 1984-02-22 Unité de déviation pour tube-image

Country Status (5)

Country Link
US (1) US4536730A (fr)
EP (1) EP0117518B1 (fr)
JP (1) JPS59160946A (fr)
CA (1) CA1210434A (fr)
DE (2) DE3306385A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5614782A (en) * 1994-06-24 1997-03-25 Samsung Display Devices Co., Ltd. Deflection yoke and vertical deflection coil winding method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1363751A (fr) * 1962-07-19 1964-06-12 Philips Nv Système de bobines de déviation
DE2324054A1 (de) * 1973-05-12 1974-11-28 Licentia Gmbh Ablenkspuleneinheit fuer kathodenstrahlroehren
JPS5076915A (fr) * 1973-11-08 1975-06-24
JPS5510759Y2 (fr) * 1974-10-17 1980-03-08
US4128824A (en) * 1977-09-29 1978-12-05 Rca Corporation Multilayered deflection yoke
US4228413A (en) * 1978-12-11 1980-10-14 Rca Corporation Saddle-toroid deflection winding for low loss and/or reduced conductor length

Also Published As

Publication number Publication date
JPS59160946A (ja) 1984-09-11
DE3471402D1 (en) 1988-06-23
US4536730A (en) 1985-08-20
DE3306385A1 (de) 1984-08-30
CA1210434A (fr) 1986-08-26
EP0117518A1 (fr) 1984-09-05

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