EP0690470A1 - Electron beam deflection system for cathode ray tubes - Google Patents

Electron beam deflection system for cathode ray tubes Download PDF

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Publication number
EP0690470A1
EP0690470A1 EP94401502A EP94401502A EP0690470A1 EP 0690470 A1 EP0690470 A1 EP 0690470A1 EP 94401502 A EP94401502 A EP 94401502A EP 94401502 A EP94401502 A EP 94401502A EP 0690470 A1 EP0690470 A1 EP 0690470A1
Authority
EP
European Patent Office
Prior art keywords
deflection system
deflection
ring
coils
rear ring
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
EP94401502A
Other languages
German (de)
French (fr)
Other versions
EP0690470B1 (en
Inventor
Jean-Philippe Descombes
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 DE69408443T priority Critical patent/DE69408443T2/en
Priority to EP94401502A priority patent/EP0690470B1/en
Priority to AT94401502T priority patent/ATE163107T1/en
Priority to TW083108175A priority patent/TW282553B/zh
Priority to US08/465,025 priority patent/US5557165A/en
Priority to KR1019950017736A priority patent/KR100374165B1/en
Priority to SG1995000781A priority patent/SG34243A1/en
Priority to CN95107837A priority patent/CN1066284C/en
Priority to MYPI95001807A priority patent/MY114273A/en
Priority to PL95309455A priority patent/PL176428B1/en
Priority to JP16735695A priority patent/JP4009333B2/en
Publication of EP0690470A1 publication Critical patent/EP0690470A1/en
Application granted granted Critical
Publication of EP0690470B1 publication Critical patent/EP0690470B1/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
    • 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

  • the invention relates to a system for deflecting electron beams for cathode ray tubes, and more particularly to the assembly of its constituent elements and to its attachment to the neck of the tube.
  • Such a deflection system 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 flux 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.
  • the maintenance in position of the vertical deflection coils and the ring of ferromagnetic material is accomplished by means of a crown 13, coming to be fixed on rails 10 arranged on the part substantially cylindrical of the separator 2; this separator is moreover provided with feet, the housings 11 of which are shown in the figure, as well as with an elastic crown 14 allowing the fixing of the deflection device 1 on the neck of the tube by means of a clamping collar placed around 14
  • the crown 13 slides in the rails 10 until the vertical deflection coils are pressed against the front of the separator; a step of bonding the crown 13 completes the immobilization of the assembly.
  • This device can however only be used reliably for the assembly of coils of vertical deflection of the toroidal type, that is to say wound on the ring of ferromagnetic material;
  • the crown 13 mechanically holds both the vertical deflection coils and the ring of ferromagnetic material.
  • the coils 4 extend along the axis Z over a length greater than that of the ring 5; a device as shown in FIG. 2 could not provide mechanical maintenance for the ring 5.
  • the removable rear part, of substantially annular shape 20 is shown from the front in FIG. 4.
  • the same part is shown in FIG. 5, in radial section along the axis AA passing through the flexible legs 22, when it is placed in the deflection system 1.
  • the main body 26 and the removable rear part 22 are joined together by flexible legs 60, arranged on the internal periphery of 22 and s 'extending towards the flared part of the separator; these tabs 60 are provided with openings which snap onto lugs 61 arranged on the internal surface 62 of the main part 2 of the separator.
  • the pins are arranged in such a way that the latching of the legs 60 and of the pins 61 takes place when the rear part 22 abuts on the main body 2, this in order to optimize the mechanical rigidity of the assembly.
  • flexible tabs 22 are arranged on the external periphery of the part 20 so as to partially cover these coils. As illustrated in detail by FIGS. 8A and 8B, these tabs further comprise on their internal surface a protuberance 30 intended to exert pressure on the rear of the coils 25 in order to keep them, without damaging them, pressed against the body of the separator .
  • the tabs 22 are distributed homogeneously over the periphery of the crown 20; in one embodiment of the invention, these legs are 6 in number, distributed regularly every 60 °.
  • the rear part 20 of the separator has arms 21, disposed on its periphery and extending towards the flared part of the separator.
  • the length of these arms is such that the latter come into contact with the ring 5, taking into account the tolerances admissible over the length of the said ring, when the ring is in abutment on the front of the deflection device.
  • These arms are at least 3 to avoid any tilting of the ring 5.
  • it has been chosen to immobilize the ring 5 thanks to 4 arms distributed regularly over the external periphery of the part. rear 20, every 90 °.
  • the latter may have a U-shaped section as shown in FIG. 6 showing in rear section the rear part 20 of the separator.
  • the end of the arms 21 have an opening 40 intended for the passage of the glue which has to adhere the end of the arm to the rear of the ring 5; the U-shape participates in guiding the adhesive towards the end 40.

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Particle Accelerators (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

The CRT (1) has a bucket shaped horizontal deflection coil (5) and a vertical deflection coil (25). The front section has a rigid separator (26) which is comb-shaped. The rear section has a removable rear ring (20) which partially covers via protruding arms (21) the vertical coils and positionally locks the coils to the main body. The protruding arms are made of a ferrite material. <IMAGE>

Description

L'invention se rapporte à un système de déviation des faisceaux électroniques pour tube à rayons cathodiques, et plus particulièrement à l'assemblage de ses éléments constitutifs et à sa fixation sur le col du tube.The invention relates to a system for deflecting electron beams for cathode ray tubes, and more particularly to the assembly of its constituent elements and to its attachment to the neck of the tube.

Un tel système de déviation 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.Such a deflection system 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 flux 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.

Dans le cas ou les bobines sont en forme de selle, l'assemblage des différents éléments constitutifs du système de déflexion se déroule de la façon suivante:

  • les bobines de déflexion horizontale sont d'abord disposées à l'intérieur du séparateur et généralement maintenues à sa place par clipsage et/ou collage
  • les bobines de déflexion verticales sont ensuite disposées sur la partie externe du séparateur; la fixation de leur partie avant est souvent réalisée en introduisant cette partie dans un logement prévu sur le séparateur
  • enfin l'anneau en matériau ferromagnétique vient sur les bobines de déflexion verticale qu'il recouvre partiellement
La partie arrière des bobines de déflexion verticale doit être immobilisée afin que la position de l'anneau en matériau ferromagnétique soit réglée précisément de façon à ce que les champs créés par les bobines de déflexion aient la conformation désirée pour assurer la convergence des faisceaux électroniques sur toute la surface écran du tube. Une fois ce réglage réalisé, l'anneau doit être immobilisé de façon définitive. Pour permettre le maintien de cet anneau grâce à un dispositif dont la mise à sa place est simple et rapide, le séparateur selon l'invention est réalisé en deux parties, un corps principal en forme d'entonnoir et un anneau arrière amovible, caractérisé en ce que :
  • le corps principal et l'anneau arrière amovible comportent des moyens de verrouillage permettant de les solidariser l'un à l'autre
  • l'anneau arrière amovible comporte des moyens de maintien de la partie arrière des bobines de déflexion verticale En outre, l'anneau arrière assure le maintien de l'arrière des bobines de déflexion verticale en venant le recouvrir grâce à des moyens disposés sur la périphérie du dit anneau. L'invention sera mieux comprise à l'aide des dessins, parmi lesquels:
  • les figures 1 et 2 représente des systèmes de déflexion selon l'état de la technique
  • la figure 3 représente un système de déflexion selon l'invention
  • la figure 4 est la représentation de face dans le plan XY de l'anneau arrière du séparateur
  • la figure 5 est une vue en coupe suivant un plan contenant l'axe Z du dispositif de déflexion assemblé
  • la figure 6 est une vue en coupe suivant le plan YZ de l'anneau arrière du séparateur
  • les figures 7A et 7B représentent de face et en coupe les moyens permettant le maintien en position de l'anneau en matériau ferromagnétique
  • les figures 8A et 8B représentent de face et en coupe les moyens permettant le maintien de la partie arrière des bobines de déflexion verticale
La figure 1 représente un système de déflexion 1 comprenant une paire de bobines de déflexion horizontale 3 en forme de selle, une paire de bobine de déflexion 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 du tube à rayons cathodiques 6 afin de dévier les faisceaux électroniques issus du canon 7 pour qu'ils explorent la totalité de la surface écran 9 du tube. Les différents éléments composant le système 1 peuvent être maintenus dans une position de réglage optimale par collage, le séparateur 2 assurant à la fois le support des différents éléments et la rigidité mécanique de l'ensemble. Cependant, un maintien par collage ralentit la fabrication du système 1 car l'anneau 5 ne peut être positionné que lorsque les bobines 4 sont définitivement immobilisées; de plus, le maintien par simple collage de la partie arrière des bobines 4 n'est pas suffisamment fiable, compte tenu des contraintes mécaniques auxquelles peut être soumis le système 1 lors de manipulations destinées à le mettre en place sur le col du tube; un décollement de la partie arrière de ces bobines compromettrait définitivement le bon fonctionnement de l'ensemble tube et système de déflexion.In the case where the coils are in the form of a saddle, the assembly of the various constituent elements of the deflection system takes place as follows:
  • the horizontal deflection coils are first placed inside the separator and generally held in place by clipping and / or gluing
  • the vertical deflection coils are then placed on the external part of the separator; the fixing of their front part is often carried out by introducing this part into a housing provided on the separator
  • finally the ring of ferromagnetic material comes on the coils of vertical deflection which it partially covers
The rear part of the vertical deflection coils must be immobilized so that the position of the ferromagnetic material ring is precisely adjusted so that the fields created by the deflection coils have the desired conformation to ensure the convergence of the electron beams on the entire screen surface of the tube. Once this adjustment has been made, the ring must be permanently immobilized. To allow the maintenance of this ring by means of a device whose installation is simple and rapid, the separator according to the invention is produced in two parts, a main body in the form of a funnel and a removable rear ring, characterized in what:
  • the main body and the removable rear ring include locking means making it possible to secure them to one another
  • the removable rear ring includes means for holding the rear part of the vertical deflection coils In addition, the rear ring maintains the rear of the vertical deflection coils by covering it by means arranged on the periphery of the said ring. The invention will be better understood using the drawings, among which:
  • Figures 1 and 2 show deflection systems according to the state of the art
  • FIG. 3 represents a deflection system according to the invention
  • Figure 4 is the front view in the XY plane of the rear ring of the separator
  • Figure 5 is a sectional view along a plane containing the Z axis of the assembled deflection device
  • Figure 6 is a sectional view along the plane YZ of the rear ring of the separator
  • FIGS. 7A and 7B show from the front and in section the means allowing the ring in ferromagnetic material to be held in position
  • FIGS. 8A and 8B show from the front and in section the means allowing the rear part of the vertical deflection coils to be maintained
FIG. 1 represents a deflection system 1 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 placed on the neck 8 of the cathode ray tube 6 in order to deflect the electron beams coming from the barrel 7 so that they explore the entire surface screen 9 of the tube. The different elements making up the system 1 can be kept in an optimal adjustment position by bonding, the separator 2 ensuring both the support of the different elements and the mechanical rigidity of the assembly. However, holding by gluing slows down the manufacturing of the system 1 because the ring 5 can only be positioned when the coils 4 are definitively immobilized; in addition, the maintenance by simple bonding of the rear part of the coils 4 is not sufficiently reliable, taking into account the mechanical stresses to which the system 1 may be subjected during manipulations intended to place it on the neck of the tube; detachment of the rear part of these coils would definitively compromise the proper functioning of the tube and deflection system assembly.

Dans un autre mode de réalisation connu, représenté à la figure 2, le maintien en position des bobines de déflexion verticale et de l'anneau en matériau ferromagnétique est accompli grâce à une couronne 13, venant se fixer sur des rails 10 disposés sur la partie sensiblement cylindrique du séparateur 2; ce séparateur est par ailleurs muni des pieds, dont les logements 11 sont représentés sur la figure, ainsi que d'une couronne élastique 14 permettant la fixation du dispositif de déflexion 1 sur le col du tube grâce à un collier de serrage disposé autour de 14. La couronne 13 vient glisser dans les rails 10 jusqu'à plaquer les bobines de déflexion verticale contre l'avant du séparateur; une étape de collage de la couronne 13 vient parfaire l'immobilisation de l'ensemble. Ce dispositif ne peut cependant être utilisés de façon fiable que pour l'assemblage de bobines de déflexion verticale de type toroïdal, c'est-à-dire bobinées sur l'anneau en matériau ferromagnétique; Dans ce cas la couronne 13 maintien mécaniquement à la fois les bobines de déflexion verticales et l'anneau en matériau ferromagnétique. Dans le cas de bobines en forme de selle, comme représentées sur la figure 1, les bobines 4 s'étendent le long de l'axe Z sur une longueur supérieure à celle de l'anneau 5; un dispositif comme représenté dans la figure 2 ne pourrait pas assurer le maintien mécanique de l'anneau 5.In another known embodiment, represented in FIG. 2, the maintenance in position of the vertical deflection coils and the ring of ferromagnetic material is accomplished by means of a crown 13, coming to be fixed on rails 10 arranged on the part substantially cylindrical of the separator 2; this separator is moreover provided with feet, the housings 11 of which are shown in the figure, as well as with an elastic crown 14 allowing the fixing of the deflection device 1 on the neck of the tube by means of a clamping collar placed around 14 The crown 13 slides in the rails 10 until the vertical deflection coils are pressed against the front of the separator; a step of bonding the crown 13 completes the immobilization of the assembly. This device can however only be used reliably for the assembly of coils of vertical deflection of the toroidal type, that is to say wound on the ring of ferromagnetic material; In this case the crown 13 mechanically holds both the vertical deflection coils and the ring of ferromagnetic material. In the case of saddle-shaped coils, as shown in FIG. 1, the coils 4 extend along the axis Z over a length greater than that of the ring 5; a device as shown in FIG. 2 could not provide mechanical maintenance for the ring 5.

La figure 3 est une illustration d'un dispositif de déflexion selon l'invention : le séparateur comporte deux parties distinctes l'une de l'autre, un corps principal 26 dont au moins une partie est de forme évasée et une partie arrière 20 venant se solidariser à la précédente par des moyens décrits plus loin; différents moyens sont solidaires de la partie arrière 20 :

  • des bras 21 s'étendent longitudinalement vers la partie évasée du séparateur pour venir effleurer l'anneau en matériau ferromagnétique 5
  • des pattes flexibles 22 recouvrent la partie arrière des bobines 25 de déflexion verticale
  • des pattes flexibles 23, disposées sur la périphérie de la partie de 20 la plus éloignée de l'avant du séparateur, sont recouvertes d'un anneau de serrage 24; l'ensemble permet la fixation du dispositif de déflexion sur le col du tube.
FIG. 3 is an illustration of a deflection device according to the invention: the separator comprises two parts which are distinct from each other, a main body 26 of which at least one part is of flared shape and a rear part 20 coming from to join the previous one by the means described below; different means are integral with the rear part 20:
  • arms 21 extend longitudinally towards the flared part of the separator to touch the ring of ferromagnetic material 5
  • flexible tabs 22 cover the rear part of the coils 25 of vertical deflection
  • flexible tabs 23, disposed on the periphery of the part furthest from the front of the separator, are covered with a clamping ring 24; the assembly allows the fixing of the deflection device on the neck of the tube.

Dans un mode de réalisation de l'invention, la partie arrière amovible, de forme sensiblement annulaire 20 est représentée de face à la figure 4. La même pièce est représentée à la figure 5, en coupe radiale suivant l'axe AA passant par les pattes flexibles 22, lorqu'elle est mise en place dans le système de déflexion 1. La solidarisation du corps principal 26 et de la partie arrière amovible 22 s'opère grâce à des pattes flexibles 60, disposées sur la périphérie interne de 22 et s'étendant vers la partie évasée du séparateur; ces pattes 60 sont munies d'ouvertures venant s'encliqueter sur des ergots 61 disposés sur la surface interne 62 de la partie principale 2 du séparateur. Les ergots sont disposés de telle façon que l'encliquetage des pattes 60 et des ergots 61 s'effectue lorsque la partie arrière 22 vient en butée sur le corps principal 2, ceci afin d'optimiser la rigidité mécanique de l'ensemble. Pour maintenir en place l'arrière des bobines de déflexion verticale 25, des pattes flexibles 22 sont disposées sur la périphérie externe de la partie 20 de manière à recouvrir partiellement ces bobines. Comme illustré en détail par les figure 8A et 8B, ces pattes comportent en outre sur leur surface interne une protubérance 30 destinée à exercer une pression sur l'arrière des bobines 25 afin de les maintenir, sans les endommager, plaquées contre le corps du séparateur. Les pattes 22 sont réparties de façon homogène sur la périphérie de la couronne 20; dans un mode de réalisation de l'invention, ces pattes sont au nombre de 6, réparties régulièrement tous les 60°.In one embodiment of the invention, the removable rear part, of substantially annular shape 20 is shown from the front in FIG. 4. The same part is shown in FIG. 5, in radial section along the axis AA passing through the flexible legs 22, when it is placed in the deflection system 1. The main body 26 and the removable rear part 22 are joined together by flexible legs 60, arranged on the internal periphery of 22 and s 'extending towards the flared part of the separator; these tabs 60 are provided with openings which snap onto lugs 61 arranged on the internal surface 62 of the main part 2 of the separator. The pins are arranged in such a way that the latching of the legs 60 and of the pins 61 takes place when the rear part 22 abuts on the main body 2, this in order to optimize the mechanical rigidity of the assembly. To hold the rear of the vertical deflection coils 25 in place, flexible tabs 22 are arranged on the external periphery of the part 20 so as to partially cover these coils. As illustrated in detail by FIGS. 8A and 8B, these tabs further comprise on their internal surface a protuberance 30 intended to exert pressure on the rear of the coils 25 in order to keep them, without damaging them, pressed against the body of the separator . The tabs 22 are distributed homogeneously over the periphery of the crown 20; in one embodiment of the invention, these legs are 6 in number, distributed regularly every 60 °.

Pour réaliser le maintien de l'anneau en matériau ferromagnétique 5, la partie arrière 20 du séparateur possède des bras 21, disposés sur sa périphérie et s'étendant vers la partie évasée du séparateur. La longueur de ces bras est telle que ces derniers viennent au contact de l'anneau 5, compte tenu des tolérances admissibles sur la longueur du dit anneau, lorsque l'anneau est en butée sur l'avant du dispositif de déflexion. Ces bras sont au nombre minimum de 3 pour éviter tout basculement de l'anneau 5. Dans un mode de réalisation de l'invention on a choisi d'immobiliser l'anneau 5 grâce à 4 bras répartis régulièrement sur la périphérie externe de la partie arrière 20, tous les 90°.To hold the ferromagnetic material ring 5, the rear part 20 of the separator has arms 21, disposed on its periphery and extending towards the flared part of the separator. The length of these arms is such that the latter come into contact with the ring 5, taking into account the tolerances admissible over the length of the said ring, when the ring is in abutment on the front of the deflection device. These arms are at least 3 to avoid any tilting of the ring 5. In one embodiment of the invention, it has been chosen to immobilize the ring 5 thanks to 4 arms distributed regularly over the external periphery of the part. rear 20, every 90 °.

Pour optimiser le rapport entre les poids de matière et la rigidité mécanique des bras 21, ces derniers peuvent avoir une section en forme de U comme indiqué sur la figure 6 montrant en coupe longitudinale la partie arrière 20 du séparateur.To optimize the ratio between the material weights and the mechanical rigidity of the arms 21, the latter may have a U-shaped section as shown in FIG. 6 showing in rear section the rear part 20 of the separator.

Pour parfaire le maintien de l'anneau en matériau ferromagnétique, il est possible de procéder à une phase de collage. Pour cela, comme indiqué sur la figure 6, et plus en détail sur les figures 7A et 7B, l'extrémité des bras 21 possèdent une ouverture 40 destinée au passage de la colle devant faire adhérer l'extrémité du bras à l'arrière de l'anneau 5; la forme en U participe au guidage de la colle vers l'extrémité 40.To complete the retention of the ferromagnetic material ring, it is possible to carry out a bonding phase. For this, as indicated in FIG. 6, and in more detail in FIGS. 7A and 7B, the end of the arms 21 have an opening 40 intended for the passage of the glue which has to adhere the end of the arm to the rear of the ring 5; the U-shape participates in guiding the adhesive towards the end 40.

Dans un mode de réalisation préférentiel, la fixation du dispositif de déflexion sur le col du tube est réalisé par un collier de serrage 24 disposé au dessus des pattes flexibles 23. Comme indiqué sur la figure 5, la flexibilité des pattes 23 est realisée au niveau de l'attache 50 de ces pattes à la périphérie interne de l'anneau arrière 20 : la forme de ces attaches est sensiblement en forme de esse. Cette forme spécifique présente l'avantage suivant lors du réglage du système de déflexion sur le col du tube:

  • la position le long de l'axe Z une fois fixée par le serrage du collier 24, il est souvent nécessaire de basculer le système de déviation dans le plan XZ et/ou dans le plan YZ afin d'optimiser le positionnement des axes des champs avec l'axe du canon à électrons et l'axe principal Z du tube
  • la zone 50 permet d'absorber les contraintes liées au basculement du système de déflexion sans les transmettre aux pattes 23 : de cette façon la position en Z du système de déflexion ne subit pas de modification pendant le réglage final de sa position sur le col du tube.
In a preferred embodiment, the fixing of the deflection device on the neck of the tube is carried out by a clamp 24 arranged above the flexible legs 23. As indicated in FIG. 5, the flexibility of the legs 23 is achieved at the level of the attachment 50 of these tabs to the internal periphery of the rear ring 20: the shape of these attachments is substantially in the form of a loop. This specific shape has the following advantage when adjusting the deflection system on the neck of the tube:
  • the position along the Z axis once fixed by tightening the collar 24, it is often necessary to tilt the deflection system in the XZ plane and / or in the YZ plane in order to optimize the positioning of the field axes with the axis of the electron gun and the main axis Z of the tube
  • the zone 50 makes it possible to absorb the stresses linked to the tilting of the deflection system without transmitting them to the legs 23: in this way the Z position of the deflection system does not undergo any modification during the final adjustment of its position on the neck of the tube.

Claims (13)

Système de déflexion des faisceaux d'électrons pour tube à rayons cathodiques comportant une paire de bobines de déflexion horizontale en forme de selle, une paire de bobines de déflexion verticale également en forme de selle et isolée de la précédente par un séparateur rigide et un anneau de forme sensiblement tronconique en matériau ferromagnétique disposé au dessus d'au moins une paire de bobines de déflexion, le séparateur étant en outre composé d'un corps principal en forme d'entonnoir et d'un anneau arrière amovible caractérisé en ce que : - le corps principal et l'anneau arrière amovible comportent des moyens de verrouillage permettant de les solidariser l'un à l'autre - l'anneau arrière amovible comporte des moyens de maintien de la partie arrière des bobines de déflexion verticale Electron beam deflection system for cathode ray tube comprising a pair of saddle-shaped horizontal deflection coils, a pair of saddle-shaped vertical deflection coils and isolated from the previous one by a rigid separator and a ring of substantially frustoconical shape made of ferromagnetic material placed above at least one pair of deflection coils, the separator further being composed of a main funnel-shaped body and of a removable rear ring characterized in that: - the main body and the removable rear ring include locking means making it possible to secure them to one another - the removable rear ring includes means for holding the rear part of the vertical deflection coils Système de déflexion des faisceaux électroniques selon la revendication 1 caractérisé en ce que l'anneau arrière possède des moyens permettant sa fixation sur le col du tubeDeflection system of the electron beams according to claim 1 characterized in that the rear ring has means allowing its fixing on the neck of the tube Système de déflexion des faisceaux électroniques selon la revendication 2 caractérisé en ce que les moyens de fixation sont des pattes flexibles solidaires de l'anneau arrière et s'étendant dans la direction de l'axe principal du tubeDeflection system of the electron beams according to claim 2 characterized in that the fixing means are flexible tabs integral with the rear ring and extending in the direction of the main axis of the tube Système de déflexion selon la revendication 3 caractérisé en ce que la zone ou les pattes flexibles s'attachent à l'anneau arrière sont sensiblement en forme de esse.Deflection system according to claim 3 characterized in that the zone or the flexible legs which attach to the rear ring are substantially in the form of a loop. Système de déflexion selon l'une des revendications 1 à 4 caractérisé en ce que les moyens de verrouillage sont des ergots disposés sur la partie arrière du corps principal coopérant avec des pattes flexibles solidaires de l'anneau arrière et munies d'ouvertureDeflection system according to one of claims 1 to 4 characterized in that the locking means are lugs arranged on the rear part of the main body cooperating with flexible lugs integral with the rear ring and provided with opening Système de déflexion selon la revendication 5 caractérisé en ce que les ergots sont disposés sur la surface intérieure du corps principalDeflection system according to claim 5 characterized in that the pins are arranged on the inner surface of the main body Système de déflexion selon l'une des revendications précédentes caractérisé en ce que les moyens de maintien sont des bras disposés à la périphérie de l'anneau arrière et qui, une fois les deux parties du séparateur solidarisées, s'étendent vers la partie évasée du dit séparateur.Deflection system according to one of the preceding claims, characterized in that the holding means are arms arranged on the periphery of the rear ring and which, once the two parts of the separator are secured, extend towards the flared part of the said separator. Système de déflexion selon la revendication 7 caractérisé en ce que ces bras sont au moins au nombre de troisDeflection system according to claim 7 characterized in that these arms are at least three in number Système de déflexion selon la revendication 7 ou 8 caractérisé en ce que ces bras ont une section en forme de UDeflection system according to claim 7 or 8 characterized in that these arms have a U-shaped section Système de déflexion selon l'une des revendications 7 à 9 caractérisé en ce que chaque bras comporte une ouverture en son extrémitéDeflection system according to one of Claims 7 to 9, characterized in that each arm has an opening at its end Système de déflexion selon l'une quelconque des revendications précédentes caractérisé en ce que l'anneau arrière porte sur sa périphérie des pattes flexibles qui, s'étendent au dessus de la partie arrière des bobines de déflexion verticaleDeflection system according to any one of the preceding claims, characterized in that the rear ring carries on its periphery flexible tabs which extend above the rear part of the vertical deflection coils Système de déflexion selon la revendication précédente caractérisé en ce que chaque patte flexible comporte au moins une protubérance venant au contact de la partie arrière d'une bobine de déflexion verticaleDeflection system according to the preceding claim characterized in that each flexible tab has at least one protrusion coming into contact with the rear part of a vertical deflection coil Tube à rayons cathodiques dont le système de déflexion est conforme à l'une au moins des revendications précédentesCathode ray tube whose deflection system conforms to at least one of the preceding claims
EP94401502A 1994-01-07 1994-07-01 Electron beam deflection system for cathode ray tubes Expired - Lifetime EP0690470B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE69408443T DE69408443T2 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
EP94401502A EP0690470B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
AT94401502T ATE163107T1 (en) 1994-07-01 1994-07-01 ELECTRON BEAM DEFLECTION SYSTEM FOR CATHODE RAY TUBES
TW083108175A TW282553B (en) 1994-07-01 1994-09-05
US08/465,025 US5557165A (en) 1994-01-07 1995-06-05 Deflection yoke attachment arrangement
KR1019950017736A KR100374165B1 (en) 1994-07-01 1995-06-28 Deflection yoke for cathode ray tube
SG1995000781A SG34243A1 (en) 1994-07-01 1995-06-30 A deflection yoke attachment arrangement
CN95107837A CN1066284C (en) 1994-07-01 1995-06-30 A deflection yoke attachment arrangement
MYPI95001807A MY114273A (en) 1994-07-01 1995-06-30 A deflection yoke attachment arrangment
PL95309455A PL176428B1 (en) 1994-07-01 1995-06-30 Set of crt deflection coils
JP16735695A JP4009333B2 (en) 1994-07-01 1995-07-03 Deflection yoke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94401502A EP0690470B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes

Publications (2)

Publication Number Publication Date
EP0690470A1 true EP0690470A1 (en) 1996-01-03
EP0690470B1 EP0690470B1 (en) 1998-02-04

Family

ID=8218023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401502A Expired - Lifetime EP0690470B1 (en) 1994-01-07 1994-07-01 Electron beam deflection system for cathode ray tubes

Country Status (11)

Country Link
US (1) US5557165A (en)
EP (1) EP0690470B1 (en)
JP (1) JP4009333B2 (en)
KR (1) KR100374165B1 (en)
CN (1) CN1066284C (en)
AT (1) ATE163107T1 (en)
DE (1) DE69408443T2 (en)
MY (1) MY114273A (en)
PL (1) PL176428B1 (en)
SG (1) SG34243A1 (en)
TW (1) TW282553B (en)

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EP0794551A1 (en) * 1996-03-08 1997-09-10 THOMSON TUBES &amp; DISPLAYS S.A. Electron beam deflection system for a cathode ray tube
EP0821388A1 (en) * 1996-07-25 1998-01-28 THOMSON TUBES &amp; DISPLAYS S.A. Device for fixing a deflector on the neck of a cathode ray tube
CN100503048C (en) * 2005-12-30 2009-06-24 赣州金环磁选设备有限公司 Dry type vibratory high-gradient magnetic separator

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JPH10501655A (en) * 1995-04-05 1998-02-10 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ Cathode ray tube and deflection unit for cathode ray tube
JPH10188847A (en) * 1996-12-19 1998-07-21 Sony Corp Divided type coil separator
KR100340755B1 (en) * 1998-09-30 2002-06-15 이형도 Deflection yoke
LT4703B (en) 1998-09-30 2000-09-25 Samsung Electro-Mechanics Co., Ltd. Deflection yoke
KR101018742B1 (en) * 2010-12-30 2011-03-04 삼성물산 주식회사 The facilities for offshre lng floating storage with jack-up platform regasification unit

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CN100503048C (en) * 2005-12-30 2009-06-24 赣州金环磁选设备有限公司 Dry type vibratory high-gradient magnetic separator

Also Published As

Publication number Publication date
KR100374165B1 (en) 2003-04-26
CN1119337A (en) 1996-03-27
KR960005724A (en) 1996-02-23
US5557165A (en) 1996-09-17
DE69408443D1 (en) 1998-03-12
SG34243A1 (en) 1996-12-06
PL309455A1 (en) 1996-01-08
TW282553B (en) 1996-08-01
JP4009333B2 (en) 2007-11-14
CN1066284C (en) 2001-05-23
MY114273A (en) 2002-09-30
ATE163107T1 (en) 1998-02-15
PL176428B1 (en) 1999-05-31
DE69408443T2 (en) 1998-09-03
EP0690470B1 (en) 1998-02-04
JPH0850865A (en) 1996-02-20

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