EP0794551A1 - Electron beam deflection system for a cathode ray tube - Google Patents

Electron beam deflection system for a cathode ray tube Download PDF

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Publication number
EP0794551A1
EP0794551A1 EP96400495A EP96400495A EP0794551A1 EP 0794551 A1 EP0794551 A1 EP 0794551A1 EP 96400495 A EP96400495 A EP 96400495A EP 96400495 A EP96400495 A EP 96400495A EP 0794551 A1 EP0794551 A1 EP 0794551A1
Authority
EP
European Patent Office
Prior art keywords
coils
separator
diverter according
saddle
deflection coils
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.)
Granted
Application number
EP96400495A
Other languages
German (de)
French (fr)
Other versions
EP0794551B1 (en
Inventor
Alain Dossot
Christophe Mathey
Alain Vougny
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.)
Thomson Tubes and Displays SA
Original Assignee
Thomson Tubes and Displays SA
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 Thomson Tubes and Displays SA filed Critical Thomson Tubes and Displays SA
Priority to EP96400495A priority Critical patent/EP0794551B1/en
Priority to DE69615334T priority patent/DE69615334T2/en
Priority to US08/807,844 priority patent/US5818159A/en
Priority to SG9700674A priority patent/SG97754A1/en
Priority to KR1019970007345A priority patent/KR100464705B1/en
Priority to MXPA/A/1997/001774A priority patent/MXPA97001774A/en
Priority to JP9068970A priority patent/JPH103865A/en
Priority to MYPI97000958A priority patent/MY113644A/en
Priority to CNB971116334A priority patent/CN1148779C/en
Publication of EP0794551A1 publication Critical patent/EP0794551A1/en
Priority to HK98103094A priority patent/HK1003919A1/en
Application granted granted Critical
Publication of EP0794551B1 publication Critical patent/EP0794551B1/en
Anticipated expiration legal-status Critical
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
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings
    • 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

  • FIG. 1 shows a deflection system also called a deflector, comprising a pair of horizontal deflection coils 3 in the form of a saddle, a pair of vertical deflection coils 4 also in the form of a saddle, isolated from the previous one by a separator 2; a ring of ferromagnetic material 5 is placed around the coils 3 and 4.
  • the assembly is arranged on the neck 8 of a cathode ray tube 6, of main axis Z, in order to deflect the electron beams coming from the barrel 7, along the axes X and Y, so that they explore the screen surface 9 of the tube.
  • the deflection coils are arranged on the body of the separator and their relative positioning is precisely adjusted so as to generate deflection fields of desired conformation. Once this adjustment has been made, the coils must remain in place until the subsequent final immobilization stage on the separator, a stage generally carried out by bonding the coils to the body of the separator.
  • Figures 2 and 3 show how are maintained, in the prior art, the vertical deflection coils 4 on the separator 2.
  • the front 10 of the coils is inserted in the housing formed by the wall of the separator, at least one lug 13 now the front of the coils and their position along the Z axis, while a tooth 12 ensures the position along the Y axis of the part 10; the rear 11 of the coils is then adjusted against the rear of the substantially cylindrical separator, the whole is then held in position by surrounding the parts 11 with an adhesive 15.
  • the two coils are separated by an edge 14 extending in the YZ plan.
  • the adjustment of the position of the coils before the bonding phase on the body of the separator can be modified during the manipulations of the pre-adjusted deflector, either by the rotation of the front part 11 around the Z axis according to an amplitude 16 depending on the shapes of the coils and the tolerances allowed, ie displacements of the rear 11 in the XY plane, the manufacturing tolerances leaving a gap 17 between the internal surface of 11 and the surface of the separator.
  • the deflector according to the invention has a separator whose particularity is to have on at least one of its surfaces the means for positioning and holding a pair of deflection coil, these means ensuring the maintenance of the adjustment. initial coils until the bonding phase of said coils on the separator.
  • These means are produced by molding the material of the separator during the production of the latter and therefore do not require the use of adhesive or additional part.
  • the blocking of the front part in rotation about the Z axis and in position along the Y axis is ensured by at least two lugs 20 arranged on the surface of the separator 28 such that they each come at at least one point 21 into contact with the coils in the internal window 22 free of conductor.
  • the blocking of the front part of each coil is ensured by at least one edge extending over the surface of the separator, so that its ends come into contact with the coil in the window free of conductor of said coil.
  • the final design of the deflection coils goes through iteration steps, for example to perfectly adapt the convergence of the electron beams on the screen of the tube; to introduce these modifications, if necessary, without having to modify the mold for manufacturing the separators, an extremely expensive mold to manufacture, it is customary to modify the geometric distribution of the conductors, which involves modifying the shape of the internal window of the coil. It was noted that the iteration operations could lead to geometric modifications of the internal window of the coils rather located in their middle or rear part without it being necessary to modify the part located at the front of the separator, i.e. - say its most flared part.
  • the means for locking in rotation of the front of the coils are preferably arranged on the surface of the separator so as to come into contact with the coils in the part of the window rather situated towards the front of the separator: thus the designer will be able to introduce changes in the conformation of the fields without it being necessary to move the means of blocking 20 on the body of the separator and therefore having to make a new mold to manufacture said separator.
  • To immobilize the parts of the coils which are located on the substantially cylindrical rear part of the housing separator are produced by molding so that the edges of the coils engage under slight stress in these housings. In the example illustrated by FIGS.
  • the edge 14 for separating the vertical deflection coils is such that its rear part 30 is shaped so as to produce a substantially planar wall 33, parallel to the plane XZ.
  • the end 35 of the wall is bevelled so as to favor the insertion of the rear part 30 into the space provided between the wall 33 and the surface of the separator.
  • This wall is located at a distance 32 from the surface of the separator, a distance substantially equal to the thickness of the coil which is intended to be housed below.
  • This wall may extend on either side of each of the edges 14. In this way, the rear 11 of the coils 4 will be housed under stress under these walls 33 which will keep them in their position along the axes X and Y until the bonding step.
  • the rear part of the edge 14 is shaped so as to produce a curved wall 33 substantially parallel to the cylindrical surface of the separator, the curved shape of these walls being adapted to avoid that , by reaction to the stress, the coils do not come out during manipulation of the housing in which they are inserted
  • the embodiments described above are not limiting; thus several parts of each of the edges 14 can be shaped to form several walls 33; similarly the means described for positioning and maintaining vertical deflection coils are similarly adapted to horizontal deflection coils provided that they are placed on the internal surface of the separator.

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  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

The deflection coil assembly technique has a pair of coils for horizontal deflection, and a pair of coils for vertical deflection, wrapped around the outside of a Cathode Ray Tube. A ferromagnetic ring is placed outside the coils. The coils are held in place during assembly by a moulded plastic outer separator (2). The separator has sections (13) protruding into the coil to hold the coils in place.

Description

L'invention se rapporte à un système de déviation des faisceaux électroniques pour tube à rayons cathodiques, et plus particulièrement au dispositif assurant à la fois le support des bobines de déviation et la rigidité mécanique du système.
Un tel système de déviation, encore appelé déviateur, est généralement constitué d'une paire de bobines de déviation verticale, d'une paire de bobines de déviation horizontale et d'un anneau de forme sensiblement tronconique en matériau magnétique destiné à concentrer le flux créé par les bobines. Les deux paires de bobines de déviation sont isolées électriquement par un séparateur, généralement en matière plastique, lequel permet en outre d'améliorer la rigidité mécanique du dispositif de déviation, de fixer les bobines les unes par rapport aux autres et d'ajuster l'ensemble sur le col du tube. Le séparateur est constitué d'un corps principal, en une ou plusieurs parties, sensiblement en forme d'entonnoir, et d'une partie arrière flexible épousant le col du tube et destinée à fixer la position du système de déviation selon l'axe longitudinal du tube; cette fixation est généralement opérée grâce à un collier de serrage disposé au-dessus de la partie arrière flexible.
Lors de l'assemblage des éléments constitutifs du déviateur, les bobines de déviation sont installées sur le séparateur et réglées en position ,les unes par rapport aux autres de manière à engendrer les champs de déviation, vertical et horizontal, en conformité avec le tube à rayons cathodiques que le déviateur est destiné à équiper.
Après positionnement, les bobines , dans une étape ultérieure doivent être fixées de manière définitive, par exemple par collage sur le corps du séparateur. Le principal problème consiste à maintenir le positionnement relatif des bobines sur le séparateur entre l'instant où le réglage est effectué et le moment où les bobines sont définitivement fixées sur le séparateur.
Dans le cas, par exemple de bobines de déviation verticale en forme de selle, il est connu de fixer l'avant des bobines par clipsage sur l'avant du séparateur et de maintenir le positionnement des parties arrières à l'aide d'un adhésif venant entourer les dites parties arrières. Ce procédé engendre deux problèmes

  • Le clipsage sur la partie avant de la bobine ne garantie pas un absolu maintien en rotation de cette partie avant.
  • Compte tenu des tolérances de fabrication, la surface interne de la partie arrière de chaque bobine a un rayon légèrement plus grand que la surface externe du séparateur. Le maintien à l'aide d'un adhésif ne garantit pas que le réglage initial va être conservé, d'où une perte de précision par rapport à ce réglage et une disparité dans les caractéristiques des déviateurs fabriqués selon cette méthode.
L'invention entend s'affranchir de ces problèmes grâce à un déviateur comprenant un séparateur permettant le maintien en position des bobines de déviation en forme de selle une fois cette position réglée, cela jusqu'à la fixation définitive des bobines sur le séparateur, par exemple par collage. Pour cela, le déviateur selon l'invention comprend une paire de bobines de déviation verticale , une paire de bobines de déviation horizontale , au moins une des ces deux paires étant en forme de selle, un séparateur rigide isolant l'une de l'autre les paires de bobines de déviation et un anneau en matériau ferromagnétique de forme sensiblement tronconique disposé au-dessus d'au moins une partie des bobines de déviation , caractérisé en ce que l'une des paires de bobines de déviation en forme de selle est appliquée contre le corps du séparateur et est maintenue en place, à la fois sur sa partie avant et sur sa partie arrière à l'aide de moyens de maintien et de positionnement faisant parties intégrantes du corps du séparateur.The invention relates to a system for deflecting electron beams for cathode ray tubes, and more particularly to the device ensuring both the support of the deflection coils and the mechanical rigidity of the system.
Such a deflection system, also called a deflector, generally consists of a pair of vertical deflection coils, a pair of horizontal deflection coils and a ring of substantially frustoconical shape made of magnetic material intended to concentrate the flow created. by the coils. The two pairs of deflection coils are electrically insulated by a separator, generally made of plastic, which also makes it possible to improve the mechanical rigidity of the deflection device, to fix the coils relative to each other and to adjust the together on the neck of the tube. The separator consists of a main body, in one or more parts, substantially in the form of a funnel, and a flexible rear part conforming to the neck of the tube and intended to fix the position of the deflection system along the longitudinal axis. tube; this fixing is generally effected by means of a clamping collar placed above the flexible rear part.
During the assembly of the constitutive elements of the deflector, the deflection coils are installed on the separator and adjusted in position, with respect to each other so as to generate the deflection fields, vertical and horizontal, in accordance with the tube to cathode rays that the deflector is intended to equip.
After positioning, the coils, in a subsequent step must be fixed definitively, for example by gluing to the body of the separator. The main problem consists in maintaining the relative positioning of the coils on the separator between the moment when the adjustment is made and the moment when the coils are definitively fixed on the separator.
In the case, for example of saddle-shaped vertical deflection coils, it is known to fix the front of the coils by clipping onto the front of the separator and to maintain the positioning of the rear parts using an adhesive coming to surround the said rear parts. This process creates two problems
  • The clipping on the front part of the coil does not guarantee an absolute maintenance in rotation of this front part.
  • Given the manufacturing tolerances, the internal surface of the rear part of each coil has a radius slightly larger than the external surface of the separator. Maintaining with an adhesive does not guarantee that the initial setting will be retained, resulting in a loss of precision compared to this setting and a disparity in the characteristics of the deflectors manufactured according to this method.
The invention intends to overcome these problems by means of a deflector comprising a separator allowing the saddle-shaped deflection coils to be held in position once this position has been adjusted, this until the coils are definitively fixed on the separator, by example by collage. For this, the deflector according to the invention comprises a pair of vertical deflection coils, a pair of horizontal deflection coils, at least one of these two pairs being in the form of a saddle, a rigid separator insulating from one another the pairs of deflection coils and a ring of ferromagnetic material of substantially frustoconical shape disposed above at least part of the deflection coils, characterized in that one of the pairs of saddle-shaped deflection coils is applied against the body of the separator and is held in place, both on its front part and on its rear part by means of holding and positioning means forming integral parts of the body of the separator.

L'invention sera mieux comprise à l'aide des dessins suivants:

  • la figure 1 représente une coupe longitudinale d'un tube à rayons cathodiques sur le col duquel est installé un dispositif de déviation des faisceaux électroniques
  • la figure 2 est une vue de l'arrière d'un déviateur selon l'état de la technique
  • la figure 3 est une coupe transversale de la partie avant du séparateur montant un exemple de dispositif de maintien de la partie avant d'une bobine en forme de selle selon l'état de la technique
  • la figure 4 représente vu de l'arrière un déviateur selon l'invention
  • la figure 5 est une vue de coté d'un séparateur destiné à un déviateur selon l'invention
  • la figure 6 est une vue en détail de la partie arrière sensiblement annulaire du séparateur destiné à un déviateur selon l'invention.
  • la figure 7 est une vue en détail de la partie arrière sensiblement annulaire du séparateur destiné à un déviateur selon un mode de réalisation alternatif de l'invention.
The invention will be better understood using the following drawings:
  • FIG. 1 represents a longitudinal section of a cathode ray tube on the neck of which is installed a device for deflecting the electron beams
  • Figure 2 is a rear view of a deflector according to the state of the art
  • Figure 3 is a cross section of the front part of the separator mounting an example of a device for holding the front part of a saddle-shaped coil according to the prior art
  • FIG. 4 represents seen from the rear a diverter according to the invention
  • Figure 5 is a side view of a separator for a deflector according to the invention
  • Figure 6 is a detailed view of the substantially annular rear part of the separator for a diverter according to the invention.
  • Figure 7 is a detailed view of the substantially annular rear part of the separator for a diverter according to an alternative embodiment of the invention.

La figure 1 représente un système de déviation encore appelé déviateur, comprenant une paire de bobines de déviation horizontale 3 en forme de selle, une paire de bobines de déviation verticale 4 également en forme de selle, isolée de la précédente par un séparateur 2; un anneau en matériau ferromagnétique 5 est disposé autour des bobines 3 et 4 . L'ensemble est disposé sur le col 8 d'un tube à rayons cathodiques 6 , d'axe principal Z, afin de dévier les faisceaux d'électrons issus du canon 7, selon les axes X et Y , pour qu'ils explorent la surface écran 9 du tube.
Lors de l'assemblage des éléments constitutifs du déviateur les bobines de déviation sont disposées sur le corps du séparateur et leur positionnement relatif est réglé précisément de manière à engendrer des champs de déviation de conformation désirée. Une fois ce réglage accompli, les bobines doivent rester en place jusqu'à l'étape ultérieure d'immobilisation finale sur le séparateur, étape généralement réalisée par collage des bobines sur le corps du séparateur.
Les figures 2 et 3 montrent comment sont maintenues, dans l'état de la technique ,les bobines de déviation verticales 4 sur le séparateur 2. L'avant 10 des bobines est inséré dans le logement constitué par la paroi du séparateur, au moins un ergot 13 maintenant l'avant des bobines et leur position selon l'axe Z, alors qu'une dent 12 assure la position selon l'axe Y de la partie 10; l'arrière 11 des bobines est ensuite réglé contre l'arrière du séparateur de forme sensiblement cylindrique le tout est ensuite maintenu en position en entourant les parties 11 par un adhésif 15. Les deux bobines sont séparées par une arêtes 14 s'étendant dans le plan YZ. Le réglage de la position des bobines avant la phase de collage sur le corps du séparateur peut se modifier lors des manipulations du déviateur pré-réglé, soit par la rotation de la partie avant 11 autour de l'axe Z suivant un amplitude 16 dépendant des formes des bobines et des tolérances admises, soit des déplacements de l'arrière 11 dans le plan XY , les tolérances de fabrication laissant un interstice 17 entre la surface interne de 11 et la surface du séparateur.FIG. 1 shows a deflection system also called a deflector, comprising a pair of horizontal deflection coils 3 in the form of a saddle, a pair of vertical deflection coils 4 also in the form of a saddle, isolated from the previous one by a separator 2; a ring of ferromagnetic material 5 is placed around the coils 3 and 4. The assembly is arranged on the neck 8 of a cathode ray tube 6, of main axis Z, in order to deflect the electron beams coming from the barrel 7, along the axes X and Y, so that they explore the screen surface 9 of the tube.
During the assembly of the constituent elements of the deflector the deflection coils are arranged on the body of the separator and their relative positioning is precisely adjusted so as to generate deflection fields of desired conformation. Once this adjustment has been made, the coils must remain in place until the subsequent final immobilization stage on the separator, a stage generally carried out by bonding the coils to the body of the separator.
Figures 2 and 3 show how are maintained, in the prior art, the vertical deflection coils 4 on the separator 2. The front 10 of the coils is inserted in the housing formed by the wall of the separator, at least one lug 13 now the front of the coils and their position along the Z axis, while a tooth 12 ensures the position along the Y axis of the part 10; the rear 11 of the coils is then adjusted against the rear of the substantially cylindrical separator, the whole is then held in position by surrounding the parts 11 with an adhesive 15. The two coils are separated by an edge 14 extending in the YZ plan. The adjustment of the position of the coils before the bonding phase on the body of the separator can be modified during the manipulations of the pre-adjusted deflector, either by the rotation of the front part 11 around the Z axis according to an amplitude 16 depending on the shapes of the coils and the tolerances allowed, ie displacements of the rear 11 in the XY plane, the manufacturing tolerances leaving a gap 17 between the internal surface of 11 and the surface of the separator.

Les deux problèmes précédents peuvent par ailleurs se combiner pour modifier le réglage initial de la position des bobines.
Pour éviter ces déplacements , le déviateur selon l'invention possède un séparateur dont la particularité est de posséder sur au moins une de ses surfaces les moyens de positionnement et de maintien d'une paire de bobine de déviation, ces moyens assurant le maintien du réglage initial des bobines jusqu'à la phase de collage des dites bobines sur le séparateur. Ces moyens sont réalisés par moulage de la matière du séparateur lors de la réalisation de ce dernier et ne nécessitent donc pas l'utilisation d'adhésif ou de pièce supplémentaires.
Dans un mode de réalisation tel qu'illustré par la figure 4, le blocage de la partie avant en rotation autour de l'axe Z et en position selon l'axe Y est assuré par au moins deux ergots 20 disposés sur la surface du séparateur 28 de telle manière qu'ils viennent chacun en au moins un point 21 au contact des bobines dans la fenêtre interne 22 libre de conducteur. Dans un autre mode de réalisation non représenté, le blocage de la partie avant de chaque bobine est assuré par au moins une arête s'étendant sur la surface du séparateur, de manière à ce que ses extrémités viennent au contact de la bobine dans la fenêtre libre de conducteur de la dite bobine.
La conception définitive des bobines de déviation passe par des étapes d'itération, par exemple pour parfaitement adapter la convergence des faisceaux d'électrons sur l'écran du tube; pour introduire ces modifications, si nécessaire, sans avoir à modifier le moule de fabrication des séparateurs, moule extrêmement onéreux à fabriquer, il est d'usage de modifier la répartition géométrique des conducteurs, ce qui entraîne à modifier la forme de la fenêtre interne de la bobine.
On a remarqué que les opérations d'itération pouvait entraîner des modifications géométriques des fenêtre internes des bobines plutôt situées dans leur partie milieu ou arrière sans qu'il soit nécessaire de modifier la partie située à l'avant du séparateur, c'est-à-dire sa partie la plus évasée.
Il en résulte que les moyens de blocage en rotation de l'avant des bobines sont de manière préférentielle disposés sur la surface du séparateur de manière à venir au contact des bobines dans la partie de la fenêtre plutôt située vers l'avant du séparateur : ainsi le concepteur pourra introduire des modification de conformation des champs sans qu'il soit nécessaire de déplacer les moyens de blocage 20 sur le corps du séparateur et donc d'avoir à réaliser un nouveau moule pour fabriquer le dit séparateur..
Pour immobiliser les parties des bobines qui sont situées sur la partie arrière sensiblement cylindrique du séparateur des logement sont réalisés par moulage de manière à ce que les bords des bobines viennent s'engager sous une légère contrainte dans ces logements.
Dans l'exemple illustré par les figures 5 et 6 , l'arête 14 de séparation des bobines de déviation verticale est telle que sa partie arrière 30 est conformée de manière à réaliser une paroi sensiblement plane 33, parallèle au plan XZ. L'extrémité 35 de la paroi est biseautée de manière à favoriser l'insertion de la partie arrière 30 dans l'espace aménagé entre la paroi 33 et la surface du séparateur. Cette paroi est située à une distance 32 de la surface du séparateur, distance sensiblement égale à l'épaisseur de la bobine qui est destinée à venir se loger dessous.
Cette paroi peut s'étendre de part et d'autre de chacune des arêtes 14.
De cette façon, l'arrière 11 des bobines 4 va venir se loger en contrainte sous ces parois 33 qui les maintiendront dans leur position selon les axes X et Y jusqu'à l'étape de collage .
Dans un autre mode de réalisation illustré par la figure 7, la partie arrière de l'arête 14 est conformée de manière à réaliser une paroi courbe 33 sensiblement parallèle à la surface cylindrique du séparateur, la forme courbe de ces parois étant adaptées pour éviter que, par réaction à la contrainte, les bobines ne sortent en cours de manipulation du logement dans lequel elles sont insérées Les modes de réalisation décrit ci-dessus ne sont pas limitatifs; ainsi plusieurs parties de chacune des arêtes 14 peuvent être conformées pour former plusieurs parois 33; de même les moyens décrits pour positionner et maintenir des bobines de déviation verticales sont de la même façon adaptés à des bobines de déviation horizontales à condition de les disposer sur la surface interne du séparateur.The two previous problems can also be combined to modify the initial setting of the position of the coils.
To avoid these displacements, the deflector according to the invention has a separator whose particularity is to have on at least one of its surfaces the means for positioning and holding a pair of deflection coil, these means ensuring the maintenance of the adjustment. initial coils until the bonding phase of said coils on the separator. These means are produced by molding the material of the separator during the production of the latter and therefore do not require the use of adhesive or additional part.
In an embodiment as illustrated in FIG. 4, the blocking of the front part in rotation about the Z axis and in position along the Y axis is ensured by at least two lugs 20 arranged on the surface of the separator 28 such that they each come at at least one point 21 into contact with the coils in the internal window 22 free of conductor. In another embodiment not shown, the blocking of the front part of each coil is ensured by at least one edge extending over the surface of the separator, so that its ends come into contact with the coil in the window free of conductor of said coil.
The final design of the deflection coils goes through iteration steps, for example to perfectly adapt the convergence of the electron beams on the screen of the tube; to introduce these modifications, if necessary, without having to modify the mold for manufacturing the separators, an extremely expensive mold to manufacture, it is customary to modify the geometric distribution of the conductors, which involves modifying the shape of the internal window of the coil.
It was noted that the iteration operations could lead to geometric modifications of the internal window of the coils rather located in their middle or rear part without it being necessary to modify the part located at the front of the separator, i.e. - say its most flared part.
As a result, the means for locking in rotation of the front of the coils are preferably arranged on the surface of the separator so as to come into contact with the coils in the part of the window rather situated towards the front of the separator: thus the designer will be able to introduce changes in the conformation of the fields without it being necessary to move the means of blocking 20 on the body of the separator and therefore having to make a new mold to manufacture said separator.
To immobilize the parts of the coils which are located on the substantially cylindrical rear part of the housing separator, are produced by molding so that the edges of the coils engage under slight stress in these housings.
In the example illustrated by FIGS. 5 and 6, the edge 14 for separating the vertical deflection coils is such that its rear part 30 is shaped so as to produce a substantially planar wall 33, parallel to the plane XZ. The end 35 of the wall is bevelled so as to favor the insertion of the rear part 30 into the space provided between the wall 33 and the surface of the separator. This wall is located at a distance 32 from the surface of the separator, a distance substantially equal to the thickness of the coil which is intended to be housed below.
This wall may extend on either side of each of the edges 14.
In this way, the rear 11 of the coils 4 will be housed under stress under these walls 33 which will keep them in their position along the axes X and Y until the bonding step.
In another embodiment illustrated by FIG. 7, the rear part of the edge 14 is shaped so as to produce a curved wall 33 substantially parallel to the cylindrical surface of the separator, the curved shape of these walls being adapted to avoid that , by reaction to the stress, the coils do not come out during manipulation of the housing in which they are inserted The embodiments described above are not limiting; thus several parts of each of the edges 14 can be shaped to form several walls 33; similarly the means described for positioning and maintaining vertical deflection coils are similarly adapted to horizontal deflection coils provided that they are placed on the internal surface of the separator.

Claims (11)

Déviateur pour tube à rayons cathodiques comprenant une paire de bobines de déviation verticale , une paire de bobines de déviation horizontale , au moins une des ces deux paires étant en forme de selle, un séparateur rigide isolant l'une de l'autre les paires de bobines de déviation et un anneau en matériau ferromagnétique de forme sensiblement tronconique disposé au-dessus d'au moins une partie des bobines de déviation , caractérisé en ce que l'une des paires de bobines de déviation en forme de selle est appliquée contre le corps du séparateur et est maintenue en place, à la fois sur sa partie avant et sur sa partie arrière à l'aide de moyens de maintien et de positionnement faisant parties intégrantes du corps du séparateur.Diverter for cathode ray tube comprising a pair of vertical deflection coils, a pair of horizontal deflection coils, at least one of these two pairs being in the form of a saddle, a rigid separator isolating the pairs of deflection coils and a ring of substantially frustoconical ferromagnetic material disposed above at least part of the deflection coils, characterized in that one of the pairs of saddle-shaped deflection coils is applied against the body of the separator and is held in place, both on its front part and on its rear part by means of holding and positioning means forming integral parts of the body of the separator. Déviateur selon la revendication 1 caractérisé en ce que des moyens de maintien et de positionnement sont réalisés lors du moulage du corps du séparateur.Diverter according to claim 1 characterized in that holding and positioning means are produced during the molding of the body of the separator. Déviateur selon la revendication 2 caractérisé en ce qu'un des moyens de positionnement et de maintien d'une bobine de déviation en forme de selle est constitué par au moins deux ergots destinés à s'étendre dans la fenêtre interne libre de conducteur de la bobine.Diverter according to claim 2 characterized in that one of the means for positioning and holding a saddle-shaped deflection coil consists of at least two pins intended to extend in the internal window free of the coil conductor . Déviateur selon la revendication 2 caractérisé en ce qu'un des moyens de positionnement et de maintien d'une bobine de déviation en forme de selle est constitué par au moins une arête destinée à s'étendre dans la fenêtre interne libre de conducteur de la bobine.Diverter according to claim 2 characterized in that one of the means for positioning and holding a saddle-shaped deflection coil is constituted by at least one edge intended to extend in the internal window free of conductor of the coil . Déviateur selon l'une des revendications précédentes caractérisé en ce que des moyens de positionnement et de maintien des bobines de déviation en forme de selle sont des logements recouvrant en partie les dites bobines.Diverter according to one of the preceding claims, characterized in that means for positioning and holding the saddle-shaped deflection coils are housings partially covering said coils. Déviateur selon la revendication précédente caractérisé en ce que des logements recouvrent en partie l'avant et l'arrière des dites bobines.Diverter according to the preceding claim, characterized in that housings partially cover the front and the rear of said coils. Déviateur selon l'une des revendications 5 ou 6 caractérisé qu'au moins un des logements est réalisés par moulage d'une partie des arêtes séparant l'une de l'autre les bobines d'une même paire.Diverter according to either of Claims 5 and 6, characterized in that at least one of the housings is produced by molding a part of the edges separating the coils of the same pair from one another. Déviateur selon la revendication précédente caractérisé en ce que la partie moulée recouvre partiellement les deux bobines de déviation d'une même paire.Diverter according to the preceding claim, characterized in that the molded part partially covers the two deflection coils of the same pair. Déviateur selon la revendication 7 ou 8 caractérisé en ce que la partie moulée forme une paroi d'extrémité biseautée.Diverter according to claim 7 or 8 characterized in that the molded part forms a bevelled end wall. Déviateur selon l'une des revendications 7 à 9 caractérisé en ce que la partie moulée forme une paroi courbe .Diverter according to one of Claims 7 to 9, characterized in that the molded part forms a curved wall. Tube à rayons cathodiques équipé d'un déviateur conforme à l'une quelconque des revendications précédentes.Cathode ray tube equipped with a deflector according to any one of the preceding claims.
EP96400495A 1996-03-08 1996-03-08 Electron beam deflection system for a cathode ray tube Expired - Lifetime EP0794551B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
EP96400495A EP0794551B1 (en) 1996-03-08 1996-03-08 Electron beam deflection system for a cathode ray tube
DE69615334T DE69615334T2 (en) 1996-03-08 1996-03-08 Electron beam deflection system for a cathode ray tube
US08/807,844 US5818159A (en) 1996-03-08 1997-02-26 Electron beam deflection system for a cathode ray tube
KR1019970007345A KR100464705B1 (en) 1996-03-08 1997-03-06 Electron-beam deflection system for a cathode-ray tube
SG9700674A SG97754A1 (en) 1996-03-08 1997-03-06 Electron-beam deflection system for a cathode-ray tube
JP9068970A JPH103865A (en) 1996-03-08 1997-03-07 Deflection yoke for cathode-ray tube
MXPA/A/1997/001774A MXPA97001774A (en) 1996-03-08 1997-03-07 Electron beam deviation system for a catodi ray tube
MYPI97000958A MY113644A (en) 1996-03-08 1997-03-07 Electron-beam deflection system for a cathode-ray tube
CNB971116334A CN1148779C (en) 1996-03-08 1997-03-08 Electron-bean deflection system for cathode-ray tube
HK98103094A HK1003919A1 (en) 1996-03-08 1998-04-15 Electron-beam deflection system for a cathode-ray tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP96400495A EP0794551B1 (en) 1996-03-08 1996-03-08 Electron beam deflection system for a cathode ray tube
US08/807,844 US5818159A (en) 1996-03-08 1997-02-26 Electron beam deflection system for a cathode ray tube

Publications (2)

Publication Number Publication Date
EP0794551A1 true EP0794551A1 (en) 1997-09-10
EP0794551B1 EP0794551B1 (en) 2001-09-19

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Application Number Title Priority Date Filing Date
EP96400495A Expired - Lifetime EP0794551B1 (en) 1996-03-08 1996-03-08 Electron beam deflection system for a cathode ray tube

Country Status (3)

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US (1) US5818159A (en)
EP (1) EP0794551B1 (en)
JP (1) JPH103865A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6278348B1 (en) * 1999-11-19 2001-08-21 Sony Corporation Deflection yoke
US6624560B2 (en) 2001-05-22 2003-09-23 Sony Corporation Deflection yoke
KR20040010112A (en) * 2002-07-22 2004-01-31 삼성전기주식회사 Deflection yoke with v-coil fixing structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2353951A1 (en) * 1976-06-01 1977-12-30 Sony Corp DEVIATOR FOR CATHODIC TUBE
EP0660365A1 (en) * 1993-12-22 1995-06-28 Sony Corporation Deflection apparatus
EP0690471A1 (en) * 1994-07-01 1996-01-03 THOMSON TUBES & DISPLAYS S.A. Electron beam deflection system for cathode ray tubes
EP0690470A1 (en) * 1994-07-01 1996-01-03 THOMSON TUBES & DISPLAYS S.A. Electron beam deflection system for cathode ray tubes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2353951A1 (en) * 1976-06-01 1977-12-30 Sony Corp DEVIATOR FOR CATHODIC TUBE
EP0660365A1 (en) * 1993-12-22 1995-06-28 Sony Corporation Deflection apparatus
EP0690471A1 (en) * 1994-07-01 1996-01-03 THOMSON TUBES & DISPLAYS S.A. Electron beam deflection system for cathode ray tubes
EP0690470A1 (en) * 1994-07-01 1996-01-03 THOMSON TUBES & DISPLAYS S.A. Electron beam deflection system for cathode ray tubes

Also Published As

Publication number Publication date
JPH103865A (en) 1998-01-06
US5818159A (en) 1998-10-06
EP0794551B1 (en) 2001-09-19

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