EP0690470B1 - Electron beam deflection system for cathode ray tubes - Google Patents

Electron beam deflection system for cathode ray tubes Download PDF

Info

Publication number
EP0690470B1
EP0690470B1 EP94401502A EP94401502A EP0690470B1 EP 0690470 B1 EP0690470 B1 EP 0690470B1 EP 94401502 A EP94401502 A EP 94401502A EP 94401502 A EP94401502 A EP 94401502A EP 0690470 B1 EP0690470 B1 EP 0690470B1
Authority
EP
European Patent Office
Prior art keywords
deflection system
deflection
ring
coils
separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94401502A
Other languages
German (de)
French (fr)
Other versions
EP0690470A1 (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 EP94401502A priority Critical patent/EP0690470B1/en
Priority to DE69408443T priority patent/DE69408443T2/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 PL95309455A priority patent/PL176428B1/en
Priority to CN95107837A priority patent/CN1066284C/en
Priority to SG1995000781A priority patent/SG34243A1/en
Priority to MYPI95001807A priority patent/MY114273A/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

Links

Images

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
    • 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 holding the vertical deflection coils and the ring in position ferromagnetic material is accomplished through a crown 13, coming to be fixed on rails 10 arranged on the substantially cylindrical part of the separator 2; this separator is also provided with feet, the housings 11 are shown in the figure, as well as a crown elastic 14 allowing the fixing of the deflection device 1 on the neck of the tube thanks to a clamping collar arranged around 14.
  • the crown 13 slides in the rails 10 until the deflection coils are pressed vertical against the front of the separator; a step of bonding the crown 13 completes the immobilization of the assembly.
  • This device does not can however be used reliably only for the assembly of toroidal type vertical deflection coils, i.e.

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)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Particle Accelerators (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 beam deflection system electronics for cathode ray tube, and more particularly to the assembly of its constituent elements and 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 deflection coils horizontal and a ring of substantially frustoconical shape in magnetic material intended to concentrate the flux created by the coils. The two pairs of deflection coils are electrically isolated by a separator, generally made of plastic, which also allows to improve the mechanical rigidity of the deflection device, to fix the coils relative to each other and adjust the assembly on the collar of the tube. The separator consists of a main body, in one or several parts, substantially funnel-shaped, and a part flexible rear fitting to the neck of the tube and intended to fix the position of the deflection system along the longitudinal axis of the tube; this fixation is generally operated by a clamp 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
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

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 optimal 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 ralenti 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.FIG. 1 represents a deflection system 1 comprising a pair of saddle-shaped horizontal deflection coils 3, a pair of coils vertical deflection 4, also saddle-shaped, isolated from the previous by a separator 2; a ferromagnetic material ring 5 is arranged around the coils 3 and 4. The assembly is arranged on the neck 8 of the cathode ray tube 6 in order to deflect the beams electronics from canon 7 so that they explore the entire screen surface 9 of the tube. The different elements making up the system 1 can be kept in an optimal adjustment position by gluing, the separator 2 ensuring both the support of the different elements and the mechanical rigidity of the assembly. However, holding by gluing slowed down the manufacturing of system 1 because the ring 5 cannot be positioned when the coils 4 are definitively immobilized; in addition, the holding by simple bonding of the rear part of the coils 4 is not sufficiently reliable, taking into account the mechanical constraints to which can be subjected system 1 during manipulations intended to put it in place on the neck of the tube; a detachment of the rear part of these coils would definitely 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 verticales 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 toroidal, 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 holding the vertical deflection coils and the ring in position ferromagnetic material is accomplished through a crown 13, coming to be fixed on rails 10 arranged on the substantially cylindrical part of the separator 2; this separator is also provided with feet, the housings 11 are shown in the figure, as well as a crown elastic 14 allowing the fixing of the deflection device 1 on the neck of the tube thanks to a clamping collar arranged around 14. The crown 13 slides in the rails 10 until the deflection coils are pressed vertical against the front of the separator; a step of bonding the crown 13 completes the immobilization of the assembly. This device does not can however be used reliably only for the assembly of toroidal type vertical deflection coils, i.e. wound on the ferromagnetic material ring. In this case crown 13 mechanically holding both the vertical deflection coils and the ferromagnetic material ring. In the case of shaped coils saddle, as shown in Figure 1, the coils 4 extend the along the Z axis over a length greater than that of the ring 5; a device as shown in Figure 2 could not provide the mechanical holding of the ring 5.

Le document US4338584 divulgue un exemple de réalisation de séparateur pour déviateur de tube à rayons cathodiques dont les bobines de déviation verticales sont de type toroïdal. Un chapeau amovible vient se fixer à l'arrière du séparateur et a pour fonction de permettre la solidarisation dudit séparateur au le col du tube.Document US4338584 discloses an exemplary embodiment of separator for cathode ray tube deflector including coils of vertical deflection are toroidal type. A removable hat comes attach to the back of the separator and has the function of allowing the securing said separator to the neck of the tube.

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 verticales
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 this ring to be held in place by a device which can be quickly and simply replaced, the separator according to the invention is made in two parts, a main funnel-shaped body 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

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.In addition, the rear ring maintains the rear of the coils. vertical deflection by coming to cover it by means arranged on the periphery of said ring.

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
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

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, une partie avant 26 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 front part 26 and a rear part 20 coming to join the previous one by means described further; 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, lorsqu'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 inteme 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 Figure 4, The same part is shown in Figure 5, in radial section along the axis AA passing through the flexible legs 22, when it is placed in the deflection system 1. The joining of the main body 26 and the removable rear part 22 is operated by flexible legs 60, arranged on the inner periphery of 22 and extending towards the part flared from the separator; these legs 60 are provided with openings coming snap onto pins 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 lugs 61 takes place when the rear part 22 abuts on the main body 2, in order to optimize the mechanical rigidity of the assembly. To keep in place the rear of the vertical deflection coils 25, flexible tabs 22 are arranged on the outer periphery of the part 20 so as to cover partially 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 legs 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 maintain the ring of ferromagnetic material 5, the rear part 20 of the separator has arms 21, arranged 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 allowable tolerances on the length of said ring, when the ring is in abutment on the front of the deflection device. These arms are at least 3 to avoid tipping over the ring 5. In one embodiment of the invention, we have chosen to immobilize the ring 5 thanks to 4 arms distributed regularly over the outer periphery of the rear part 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 relationship between material weights and stiffness mechanical of the arms 21, the latter may have a shaped section of U as shown in Figure 6 showing in longitudinal 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 proceed with 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 adhesive having to adhere the end of the arm to the back of the ring 5; the form U-shaped 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 (12)

  1. Electron-beam deflection system (1) for a cathode-ray tube (6) which includes a pair of saddle-shaped horizontal-deflection coils (3), a pair of vertical-deflection coils (4), also saddle-shaped and isolated from the first pair by a rigid separator (2), and an approximately frustoconical ring (5) of ferromagnetic material arranged on top of at least one pair of deflection coils, the separator furthermore being composed of a funnel-shaped main body (26) and of a removable rear ring, the said main body and the said removable rear ring (20) including locking means (60, 61) enabling them to be fastened to each other, characterized in that the removable rear ring includes means (21, 22) for holding the rear part of the vertical-deflection coils in place.
  2. Electron-beam deflection system according to Claim 1, characterized in that the rear ring has means (23) enabling it to be fixed to the neck of the tube.
  3. Electron-beam deflection system according to Claim 2, characterized in that the fixing means are flexible tabs fastened to the rear ring and extending along the direction of the main axis of the tube.
  4. Deflection system according to Claim 3, characterized in that the region (50) where the flexible tabs are attached to the rear ring has approximately the shape of an S.
  5. Deflection system according to one of Claims 1 to 4, characterized in that the locking means are studs arranged on the rear part of the main body, engaging with flexible tabs (60) fastened to the rear ring and provided with opening.
  6. Deflection system according to Claim 5, characterized in that the studs (61) are arranged on the inner surface (62) of the main body (26).
  7. Deflection system according to one of the preceding claims, characterized in that the retention means are arms (21) which are arranged around the periphery of the rear ring and, once the two parts of the separator have been fastened together, extend towards the front part of the said separator.
  8. Deflection system according to Claim 7, characterized in that the number of these arms is at least three.
  9. Deflection system according to Claims 7 or 8, characterized in that each arm has an opening (40) on the end of it.
  10. Deflection system according to any one of the preceding claims, characterized in that the rear ring has, around its periphery, flexible tabs (22) which extend on top of the rear part of the vertical-deflection coils.
  11. Deflection system according to the preceding claim, characterized in that each flexible tab includes at least one stud (30) which comes into contact with the rear part of a vertical-deflection coil.
  12. Cathode-ray tube, the deflection system of which is in accordance with 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
EP94401502A EP0690470B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
DE69408443T DE69408443T2 (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
PL95309455A PL176428B1 (en) 1994-07-01 1995-06-30 Set of crt deflection coils
CN95107837A CN1066284C (en) 1994-07-01 1995-06-30 A deflection yoke attachment arrangement
SG1995000781A SG34243A1 (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
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 EP0690470A1 (en) 1996-01-03
EP0690470B1 true 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)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996031896A1 (en) * 1995-04-05 1996-10-10 Philips Electronics N.V. Cathode ray tube and deflection unit for a cathode ray tube
EP0794551B1 (en) * 1996-03-08 2001-09-19 THOMSON TUBES &amp; DISPLAYS S.A. Electron beam deflection system for a cathode ray tube
FR2751786B1 (en) * 1996-07-25 1998-10-16 Thomson Tubes & Displays DEVIATOR FIXING DEVICE ON THE NECK OF A CATHODIC RAY TUBE
JPH10188847A (en) * 1996-12-19 1998-07-21 Sony Corp Divided type coil separator
LT4703B (en) 1998-09-30 2000-09-25 Samsung Electro-Mechanics Co., Ltd. Deflection yoke
KR100340755B1 (en) * 1998-09-30 2002-06-15 이형도 Deflection yoke
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
KR101018742B1 (en) * 2010-12-30 2011-03-04 삼성물산 주식회사 The facilities for offshre lng floating storage with jack-up platform regasification unit

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692355A (en) * 1951-06-29 1954-10-19 Gen Instrument Corp Cathode-ray tube deflection yoke
DE1107347B (en) * 1959-03-23 1961-05-25 Telefunken Patent Arrangement for the magnetic deflection of the electron beam of a cathode ray tube
JPS5282324U (en) * 1975-12-17 1977-06-20
CA1080780A (en) * 1977-01-19 1980-07-01 Tokyo Shibaura Electric Co. Deflecting yoke device
US4143346A (en) * 1977-07-26 1979-03-06 Zenith Radio Corporation Self converging, north/south pin cushion corrected hybrid yoke
US4338584A (en) * 1980-11-24 1982-07-06 Rca Corporation Television deflection yoke mount
NL8601003A (en) * 1986-03-28 1987-10-16 Philips Nv COLOR IMAGE TUBE WITH A DEFLECTION UNIT WITH IMAGE BALANCE CORRECTORS.
NL8601501A (en) * 1986-06-10 1988-01-04 Philips Nv ELECTROMAGNETIC DEFLECTOR WIRED DIRECTLY ON A CARRIER.
US5028898A (en) * 1988-08-24 1991-07-02 Hitachi, Ltd. Color cathode-ray tube having deflection yoke
US4841267A (en) * 1988-08-26 1989-06-20 Tdk Corporation Deflection apparatus for cathode ray tube
JPH02148542A (en) * 1988-11-30 1990-06-07 Hitachi Ltd Cathode ray tube, middle fixing member and deflection yoke thereof, and projection television device including the tube
JPH0720835Y2 (en) * 1989-04-26 1995-05-15 東京特殊電線株式会社 Deflection yoke
DE3923110A1 (en) * 1989-07-13 1991-01-17 Graetz Nokia Gmbh SUPPORTING DEVICE FOR A PIPE COMPONENT
JPH0748360B2 (en) * 1990-01-30 1995-05-24 三洋電機株式会社 Deflection yoke
JPH03226946A (en) * 1990-01-31 1991-10-07 Sharp Corp Cathode-ray tube type projector
KR920001984Y1 (en) * 1990-04-19 1992-03-26 삼성전관 주식회사 Separator of deflection yoke
KR930004295Y1 (en) * 1990-12-06 1993-07-10 삼성전관 주식회사 Deflection yoke
JP2566787Y2 (en) * 1991-02-12 1998-03-30 ソニー株式会社 Deflection device
JPH04112448U (en) * 1991-03-19 1992-09-30 松下電器産業株式会社 deflection yoke
JPH0648153U (en) * 1992-12-03 1994-06-28 松下電器産業株式会社 Deflection yoke

Also Published As

Publication number Publication date
KR960005724A (en) 1996-02-23
SG34243A1 (en) 1996-12-06
MY114273A (en) 2002-09-30
ATE163107T1 (en) 1998-02-15
EP0690470A1 (en) 1996-01-03
TW282553B (en) 1996-08-01
JP4009333B2 (en) 2007-11-14
CN1066284C (en) 2001-05-23
DE69408443T2 (en) 1998-09-03
PL176428B1 (en) 1999-05-31
DE69408443D1 (en) 1998-03-12
US5557165A (en) 1996-09-17
CN1119337A (en) 1996-03-27
PL309455A1 (en) 1996-01-08
JPH0850865A (en) 1996-02-20
KR100374165B1 (en) 2003-04-26

Similar Documents

Publication Publication Date Title
EP0690470B1 (en) Electron beam deflection system for cathode ray tubes
EP0604286B1 (en) Connecting element for two mechanical parts
EP2156088A2 (en) Clamping device
EP3306164A1 (en) Tightening system with controlled angular position for connecting two tubes
FR2923541A1 (en) DISCHARGE VALVE IN A TURBOMACHINE
FR2774738A1 (en) PRESSURE SHOCK ABSORBER FOR A PRESSURE TANK
EP0625440B1 (en) Device and process for fixing an axle on a suspension arm
EP3670988B1 (en) Clamping device comprising a belt and a sealing ring
FR2772983A1 (en) ELECTRIC DISCHARGE BULB DEVICE
EP0690468B1 (en) Electron beam deflection system for cathode ray tubes
FR2744527A1 (en) SEALED PHOTOELECTRIC DETECTOR
FR2534077A1 (en) ELECTRICAL CONNECTOR HAVING A CONTINUOUS ANNULAR JOINT
FR2688094A1 (en) Deflection collar for cathode-ray tube
EP0821388B1 (en) Device for fixing a deflector on the neck of a cathode ray tube
EP0690471B1 (en) Electron beam deflection system for cathode ray tubes
EP0559591B1 (en) Process for assembling an electromagnetic valve by ultrasonic welding
EP0794551B1 (en) Electron beam deflection system for a cathode ray tube
FR2461889A1 (en) WATERPROOF PROJECTOR WITH INTERCHANGEABLE LAMP
FR2733366A1 (en) DEVICE FOR RECOVERING CABLES SHIELD
FR3049016B1 (en) DEVICE FOR FASTENING A BELLOW ON A GEARBOX CONTROL LEVER.
FR2906348A1 (en) VENTILATION HEADLIGHT AND MOTOR VEHICLE THUS EQUIPPED
FR2501421A1 (en) Ground-based antenna for TV reception from geostationary satellite - comprises detector at focal point of parabolic reflector mounted on adjustable stiffening member and bracket
FR2791467A1 (en) ELECTRONIC BEAM DEVIATION SYSTEM FOR CATHODIC RADIUS TUBE
FR3091911A1 (en) Device for pivoting connection between at least two parts, aircraft comprising a cover equipped with said pivoting connection device
EP0807780B1 (en) Device for sealingly connecting two flat pipes

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB LI

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE FR GB LI

17P Request for examination filed

Effective date: 19960603

17Q First examination report despatched

Effective date: 19961004

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980204

REF Corresponds to:

Ref document number: 163107

Country of ref document: AT

Date of ref document: 19980215

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69408443

Country of ref document: DE

Date of ref document: 19980312

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: THOMSON TUBES & DISPLAYS S.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980408

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19980731

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: S.A. THOMSON TUBES & DISPLAYS

Effective date: 19980731

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 20011127

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: FR

Ref legal event code: D6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080711

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20080630

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090722

Year of fee payment: 16

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090701

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100202

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20110331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100802