EP0690471A1 - 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
EP0690471A1
EP0690471A1 EP94401503A EP94401503A EP0690471A1 EP 0690471 A1 EP0690471 A1 EP 0690471A1 EP 94401503 A EP94401503 A EP 94401503A EP 94401503 A EP94401503 A EP 94401503A EP 0690471 A1 EP0690471 A1 EP 0690471A1
Authority
EP
European Patent Office
Prior art keywords
separator
diverter according
deflection coils
coils
support edges
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
EP94401503A
Other languages
German (de)
French (fr)
Other versions
EP0690471B1 (en
Inventor
Jean-Philippe Descombes
Philippe Marotte
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 EP94401503A priority Critical patent/EP0690471B1/en
Priority to DE69414698T priority patent/DE69414698T2/en
Priority to AT94401503T priority patent/ATE173561T1/en
Priority to TW083108176A priority patent/TW331647B/en
Priority to US08/464,431 priority patent/US5589729A/en
Priority to CZ19951684A priority patent/CZ287564B6/en
Priority to KR1019950017737A priority patent/KR960005725A/en
Priority to CA002153003A priority patent/CA2153003C/en
Priority to SG1995000780A priority patent/SG48690A1/en
Priority to PL95309454A priority patent/PL177264B1/en
Priority to CN95106890A priority patent/CN1068707C/en
Priority to MYPI95001812A priority patent/MY112914A/en
Priority to RU95110771/09A priority patent/RU2216067C2/en
Priority to JP7167357A priority patent/JPH0850866A/en
Publication of EP0690471A1 publication Critical patent/EP0690471A1/en
Application granted granted Critical
Publication of EP0690471B1 publication Critical patent/EP0690471B1/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
    • H01J29/82—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
    • 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

Definitions

  • the invention relates to a system for deflecting the 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.
  • the shapes of the deflection coils of the deflector installed on the neck of a cathode ray tube determine the shapes of the field lines and thereby how the electron beams from the barrel will be deflected.
  • the internal surface of the pair of vertical deflection coils rests on the external face of the separator and the external surface of the pair of horizontal deflection coils rests on the internal face of the separator; thus, during the manufacture of the deflector or during its installation on the neck of the tube, the mechanical stresses to which the coils are subjected do not deform them.
  • the thickness of the separator defined by the distance between its internal face and its external face, could be variable; manufactured by injecting plastic material into a mold, the separator was then a difficult part to manufacture, due to the complexity of the surfaces of the internal and external faces, and consuming a lot of material because comprising parts of great thickness, thickness depending on the relative shapes of the two pairs of coils.
  • the thickness of the separator could be constant; in this case the manufacture of the separator was simplified, but this characteristic had to be integrated at the level of the design of the deflection coils where it constituted a constraint which did not allow optimizing the shapes of said coils and thereby the fields created by these coils.
  • the invention intends to propose a separator whose internal and external faces are of simple design and making it possible to separate the shapes from the internal surface of the vertical deflection coils and the shapes of the outer surface of the horizontal deflection coils.
  • the deflector incorporating the invention comprises a pair of vertical deflection coils, a pair of horizontal deflection coils, a rigid separator insulating the pairs of deflection coils from one another and a ring of shaped ferromagnetic material.
  • substantially frustoconical disposed above at least a portion of the deflection coils characterized in that one of the faces of the separator has support edges on which one of the two pairs of coils is supported.
  • the distance between the two pairs of coils is guaranteed by the thickness of the separator.
  • this thickness was chosen to be constant; this constraint was found at the level of the design of the horizontal and vertical deflection coils, the shapes of these coils then being linked to each other. If, on the contrary, we chose to make these forms independent, the space between the two coils, which the separator had to fill was found to be of variable thickness; the internal and external faces of the separator due to their complexity made it difficult to manufacture, with thicknesses in large places, resulting in excessive weight and consumption of material In addition, in the latter case, any modification of the shape of a pair of coils, to adapt it to new characteristics, requires modifying the internal and / or external face of the separator and a change of the manufacturing mold.
  • the separator 2 has a front part A, used to ensure the maintenance of the front of the horizontal deflection coils 3 and the positioning of the deflector on the tube thanks to adjustable feet whose housings 30 are indicated on the face.
  • the separator then has a flared intermediate part B and a rear part C in the form of a cylindrical ring.
  • Figures 3 and 4 show an embodiment of the invention.
  • the internal 11 and external 10 faces of the separator are designed in revolution and the distance between the two faces is constant in order to have a simple shape to manufacture.
  • the internal surface of the vertical deflection coils rests against the external face 10 of the separator.
  • the bearing surfaces on the separator of the horizontal and vertical deflection coils, in the form of a saddle, are made independent of each other by ensuring that the pair of horizontal deflection coils does not rest on the internal face 11 but on elongated support edges arranged on this face 11.
  • These support edges are arranged along the intersection of radial planes containing the axis Z with the face 11; this arrangement is chosen for the sake of simplicity of production of the manufacturing molds and because it facilitates the placement of spoils necessary for demolding the parts.
  • the radial arrangement also has the advantage of better following the shape of the deflection coils, the structure of which is defined radially, in bundles of wires arranged at precise angles.
  • these support edges can be arranged in planes parallel to one of the main axes, as long as the surface of the teeth in contact with the coils constitutes generators supporting the external surface of these coils.
  • support edges are of unequal length. They can be arranged on the flared part of the separator like the support edges 20, 20 '; it is indeed in this zone that the horizontal deflection coils can deviate most from the vertical deflection coil. Certain support edges, such as edges 22, may however be located in the rear part in the form of a cylindrical ring of the separator, to support the rear bun of the horizontal deflection coil; other edges may extend from the front to the rear such as the support edges 21, 21 ', 21' '.
  • the support edges are arranged on the face 11 along the same planes of symmetry.
  • the support edges can be produced in the same molding step as the separator and therefore in the same plastic material as the latter; alternatively they can be arranged on the face 11 after molding the body of the separator and adhere to it, for example by gluing; in this case the material constituting the support edges may be different from that of the separator.
  • the height of a support edge is generally variable and is defined at each of its points by the distance that must be maintained between the horizontal and vertical deflection coils; the support edges 20 arranged on the internal face of the separator of a 90 cm screen diagonal tube manufactured by the company Thomson Tubes & Displays can thus, in certain places of the flared part B, reach a maximum height of 2 mm , while the thickness of the separator itself is of the order of 1mm.
  • Another advantage of this invention is the ease with which modification of the horizontal deflection coils can be implemented. work: it suffices to modify at certain points the height of the support edges without changing anything on faces 10 and 11.
  • the example of the application of the invention to a deflector whose coils of horizontal and vertical deflections are in the form of a saddle is not limiting; the invention can also be implemented without difficulty in saddle / torus type deflectors, that is to say comprising saddle-shaped horizontal deflection coils and vertical deflection coils arranged around the ring in ferromagnetic material 5.

Landscapes

  • Details Of Television Scanning (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Clamps And Clips (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

The beam deflector involves a coil separator (2). The shape of the inner (11) and outer part of this section are independent. The separator has a number of rods (20,20') which are supported radially on the inner surface, and the separator isolates the vertical and horizontal deflection coils. The support rods are of variable length, and allow the vertical and horizontal coils to be wound on them. The support rods and the separator can be moulded from plastic in a single operation. <IMAGE>

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.The invention relates to a system for deflecting the 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.

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.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.

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 en place par clipsage et/ou collage
  • les bobines de déflexion verticale 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 est immobilisée et la position de l'anneau en matériau ferromagnétique est 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 est alors immobilisé de façon définitive.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 is immobilized and 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 over the entire screen surface of the tube. Once this adjustment has been made, the ring is then immobilized definitively.

Les formes des bobines de déflexion du déviateur installé sur le col d'un tube à rayons cathodiques déterminent les formes des lignes de champ et par là même la façon dont les faisceaux d'électrons issus du canon vont être déviés. Afin de garantir la forme de ces bobines, la surface interne de la paire de bobines de déflexion verticale repose sur la face externe du séparateur et la surface externe de la paire de bobines de déflexion horizontale repose sur la face interne du séparateur; ainsi, lors de la fabrication du déviateur ou lors de son installation sur le col du tube, les contraintes mécaniques auxquelles sont soumises les bobines ne viennent pas déformer celles-ci.The shapes of the deflection coils of the deflector installed on the neck of a cathode ray tube determine the shapes of the field lines and thereby how the electron beams from the barrel will be deflected. In order to guarantee the shape of these coils, the internal surface of the pair of vertical deflection coils rests on the external face of the separator and the external surface of the pair of horizontal deflection coils rests on the internal face of the separator; thus, during the manufacture of the deflector or during its installation on the neck of the tube, the mechanical stresses to which the coils are subjected do not deform them.

Dans l'art antérieur, les faces interne et externe du séparateur venaient au contact des bobines.In the prior art, the internal and external faces of the separator came into contact with the coils.

L'épaisseur du séparateur, définie par la distance entre sa face interne et sa face externe, pouvait être variable ; fabriqué par injection de matière plastique dans un moule, le séparateur était alors une pièce difficile à fabriquer, du fait de la complexité des surfaces des faces interne et externe, et consommant beaucoup de matière car comportant des parties d'épaisseur importante, épaisseur fonction des formes relatives des deux paires de bobines.The thickness of the separator, defined by the distance between its internal face and its external face, could be variable; manufactured by injecting plastic material into a mold, the separator was then a difficult part to manufacture, due to the complexity of the surfaces of the internal and external faces, and consuming a lot of material because comprising parts of great thickness, thickness depending on the relative shapes of the two pairs of coils.

L'épaisseur du séparateur pouvait être constante; dans ce cas la fabrication du séparateur s'en trouvait simplifiée, mais cette caractéristique devait être intégrée au niveau de la conception des bobines de déflexion où elle constituait une contrainte ne permettant pas d'optimiser les formes des dites bobines et par là même les champs créés par ces bobines.The thickness of the separator could be constant; in this case the manufacture of the separator was simplified, but this characteristic had to be integrated at the level of the design of the deflection coils where it constituted a constraint which did not allow optimizing the shapes of said coils and thereby the fields created by these coils.

L'invention entend proposer un séparateur dont les faces internes et externes sont de conception simple et permettant de désolidariser les formes de la surface interne des bobines de déviation verticale et des formes de la surface externe des bobines de déviation horizontale. Pour cela le déviateur incorporant l'invention comporte une paire de bobines de déviation verticale, une paire de bobines de déviation horizontale, 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 faces du séparateur comporte des arêtes de soutien sur laquelle s'appuie l'une des deux paires de bobines.The invention intends to propose a separator whose internal and external faces are of simple design and making it possible to separate the shapes from the internal surface of the vertical deflection coils and the shapes of the outer surface of the horizontal deflection coils. For this, the deflector incorporating the invention comprises a pair of vertical deflection coils, a pair of horizontal deflection coils, a rigid separator insulating the pairs of deflection coils from one another and a ring of shaped ferromagnetic material. substantially frustoconical disposed above at least a portion of the deflection coils characterized in that one of the faces of the separator has support edges on which one of the two pairs of coils is supported.

L'invention sera mieux comprise à l'aide des dessins, parmi lesquels:

  • la figure 1 représente une coupe longitudinale d'un tube à rayons cathodiques sur le col duquel est installé un déviateur selon l'état de la technique.
  • la figure 2 est une vue en coupe longitudinale selon le plan YZ d'un déviateur selon l'invention
  • la figure 3 représente une vue de face du séparateur d'un déviateur conforme à la présente invention
  • la figure 4 est une vue de profil du séparateur d'un déviateur conforme à la présente invention
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 rayons 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 optimum par collage et/ou clipsage, le séparateur 2 assurant à la fois le support des différents éléments et la rigidité mécanique de l'ensemble.The invention will be better understood using the drawings, among which:
  • Figure 1 shows a longitudinal section of a cathode ray tube on the neck of which is installed a deflector according to the prior art.
  • Figure 2 is a longitudinal sectional view along the YZ plane of a deflector according to the invention
  • FIG. 3 represents a front view of the separator of a diverter according to the present invention
  • Figure 4 is a side view of the separator of a diverter according to the present invention
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 made 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 electronic rays 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 optimum adjustment position by bonding and / or clipping, the separator 2 ensuring both the support of the different elements and the mechanical rigidity of the assembly.

La distance entre les deux paires bobines est garantie par l'épaisseur du séparateur.The distance between the two pairs of coils is guaranteed by the thickness of the separator.

Dans l'art antérieur, pour avoir des pièces plus faciles à fabriquer, cette épaisseur était choisie constante; cette contrainte se retrouvait au niveau de la conception des bobines de déviation horizontale et verticale, les formes de ces bobines étant alors liées l'une à l'autre. Si , au contraire, on choisissait de rendre ces formes indépendantes, l'espace entre les deux bobines, que devait combler le séparateur se retrouvait d'épaisseur variable; les faces internes et externes du séparateur de par leur complexité rendaient ce dernier difficile à fabriquer, avec des épaisseurs par endroit importantes, entraînant un poids et une consommation de matière excessifs
De plus, dans ce dernier cas, toute modification de la forme d'une paire de bobines, pour l'adapter à de nouvelles caractéristiques, impose de modifier la face interne et/ou externe du séparateur et un changement du moule de fabrication.In the prior art, to have parts that are easier to manufacture, this thickness was chosen to be constant; this constraint was found at the level of the design of the horizontal and vertical deflection coils, the shapes of these coils then being linked to each other. If, on the contrary, we chose to make these forms independent, the space between the two coils, which the separator had to fill was found to be of variable thickness; the internal and external faces of the separator due to their complexity made it difficult to manufacture, with thicknesses in large places, resulting in excessive weight and consumption of material
In addition, in the latter case, any modification of the shape of a pair of coils, to adapt it to new characteristics, requires modifying the internal and / or external face of the separator and a change of the manufacturing mold.

Comme montré à la figure 2, le séparateur 2 comporte une partie avant A, servant à assurer le maintien de l'avant des bobines de déviation horizontale 3 et le positionnement du déviateur sur le tube grâce à des pieds réglables dont les logements 30 sont indiqués sur la figure. Le séparateur comporte ensuite une partie intermédiaire B évasée et une partie arrière C en forme d'anneau cylindrique.As shown in Figure 2, the separator 2 has a front part A, used to ensure the maintenance of the front of the horizontal deflection coils 3 and the positioning of the deflector on the tube thanks to adjustable feet whose housings 30 are indicated on the face. The separator then has a flared intermediate part B and a rear part C in the form of a cylindrical ring.

Les figures 3 et 4 représentent un mode de réalisation de l'invention. Les faces internes 11 et externe 10 du séparateur sont conçues de révolution et la distance entre les deux faces est constante afin d'avoir une forme à fabriquer simple. La surface interne des bobines de déviation verticale repose contre la face externe 10 du séparateur. Les surfaces d'appui sur le séparateur des bobines de déviation horizontale et verticale, en forme de selle, sont rendues indépendantes l'une de l'autre en faisant en sorte que la paire de bobines de déviation horizontale s'appuie non pas sur la face interne 11 mais sur des arêtes de soutien allongées disposées sur cette face 11.Figures 3 and 4 show an embodiment of the invention. The internal 11 and external 10 faces of the separator are designed in revolution and the distance between the two faces is constant in order to have a simple shape to manufacture. The internal surface of the vertical deflection coils rests against the external face 10 of the separator. The bearing surfaces on the separator of the horizontal and vertical deflection coils, in the form of a saddle, are made independent of each other by ensuring that the pair of horizontal deflection coils does not rest on the internal face 11 but on elongated support edges arranged on this face 11.

Ces arêtes de soutien sont disposées suivant l'intersection de plans radiaux contenant l'axe Z avec la face 11; cette disposition est choisie par raison de simplicité de réalisation des moules de fabrication et parce qu'elle facilite la mise en place de dépouilles nécessaires au démoulage des pièces. La disposition radiale a de plus l'avantage de mieux suivre la forme des bobines de déflexion dont la structure est définie radialement, par paquets de fils disposés à des angles précis. Alternativement, ces arêtes de soutien peuvent être disposées dans des plans parallèles à un des axes principaux, du moment que la surface des dents en contact avec les bobines constitue des génératrices supportant la surface externe de ces bobines.These support edges are arranged along the intersection of radial planes containing the axis Z with the face 11; this arrangement is chosen for the sake of simplicity of production of the manufacturing molds and because it facilitates the placement of spoils necessary for demolding the parts. The radial arrangement also has the advantage of better following the shape of the deflection coils, the structure of which is defined radially, in bundles of wires arranged at precise angles. Alternatively, these support edges can be arranged in planes parallel to one of the main axes, as long as the surface of the teeth in contact with the coils constitutes generators supporting the external surface of these coils.

Ces arêtes de soutien sont de longueur inégale. Elles peuvent être disposées sur la partie évasées du séparateur comme les arêtes de soutien 20, 20'; c'est en effet dans cette zone que les bobines de déviation horizontale peuvent le plus s'écarter des bobine de déviation verticale. Certaines arêtes de soutien, comme les arêtes 22, peuvent cependant se situer dans la partie arrière en forme d'anneau cylindrique du séparateur, pour soutenir le chignon arrière de la bobine de déflexion horizontale; d'autres arêtes peuvent s'étendre de l'avant jusqu'à l'arrière comme les arêtes de soutien 21, 21', 21''.These support edges are of unequal length. They can be arranged on the flared part of the separator like the support edges 20, 20 '; it is indeed in this zone that the horizontal deflection coils can deviate most from the vertical deflection coil. Certain support edges, such as edges 22, may however be located in the rear part in the form of a cylindrical ring of the separator, to support the rear bun of the horizontal deflection coil; other edges may extend from the front to the rear such as the support edges 21, 21 ', 21' '.

En raison des symétries des bobines de déviation suivant les plans radiaux horizontal et vertical, les arêtes de soutien sont disposées sur la face 11 suivant les mêmes plans de symétrie.Due to the symmetries of the deflection coils along the horizontal and vertical radial planes, the support edges are arranged on the face 11 along the same planes of symmetry.

Les arêtes de soutien peuvent être réalisées dans la même étape de moulage que le séparateur et donc dans le même matériau plastique que ce dernier; alternativement elles peuvent être disposées sur la face 11 après moulage du corps du séparateur et y adhérer par exemple par collage; dans ce cas le matériau constitutif des arêtes de soutien peut être différent de celui du séparateur.The support edges can be produced in the same molding step as the separator and therefore in the same plastic material as the latter; alternatively they can be arranged on the face 11 after molding the body of the separator and adhere to it, for example by gluing; in this case the material constituting the support edges may be different from that of the separator.

La hauteur d'une arête de soutien est généralement variable et est définie en chacun de ses points par la distance qu'il faut maintenir entre les bobines de déviation horizontale et verticale; les arêtes de soutien 20 disposées sur la face interne du séparateur d'un tube de 90 cm de diagonale d'écran fabriqué par la société Thomson Tubes & Displays peuvent ainsi, en certains endroits de la partie évasée B, atteindre une hauteur maximum de 2mm, alors que l'épaisseur du séparateur lui-même est de l'ordre de 1mm.The height of a support edge is generally variable and is defined at each of its points by the distance that must be maintained between the horizontal and vertical deflection coils; the support edges 20 arranged on the internal face of the separator of a 90 cm screen diagonal tube manufactured by the company Thomson Tubes & Displays can thus, in certain places of the flared part B, reach a maximum height of 2 mm , while the thickness of the separator itself is of the order of 1mm.

Un autre avantage de cette invention est la facilité avec laquelle une modification des bobines de déviation horizontale peut être mise en oeuvre : il suffit pour cela de modifier en certains points la hauteur des arêtes de soutien sans rien changer aux faces 10 et 11.Another advantage of this invention is the ease with which modification of the horizontal deflection coils can be implemented. work: it suffices to modify at certain points the height of the support edges without changing anything on faces 10 and 11.

Un autre avantage important est apparu lors de l'utilisation de l'invention avec une fréquence d'alimentation des bobines de déviation horizontale au moins égales à 16KHz. Afin d'améliorer la qualité de l'image, il est apparu souhaitable d'avoir une fréquence de balayage ligne de cet ordre, ou mieux de 32KHz voire de 64KHz. A ces fréquences, la consommation en énergie des bobines est très importante entraînant un fort échauffement de ces dernières. L'évacuation des calories engendrées par cet échauffement pose un important problème car un échauffement excessif peut entraîner d'abord la déformation puis éventuellement la destruction du bobinage et du séparateur. Le fait que les bobines de déviation horizontale ne reposent pas directement sur la face 11 mais sur les arêtes de soutien 20, 21, 22 permet une circulation d'air entre le séparateur et les bobines ce qui contribue à leur refroidissement.Another important advantage appeared when using the invention with a supply frequency of the horizontal deflection coils at least equal to 16KHz. In order to improve the image quality, it appeared desirable to have a line scanning frequency of this order, or better of 32KHz or even 64KHz. At these frequencies, the energy consumption of the coils is very high, causing them to heat up considerably. The evacuation of the calories generated by this heating poses a major problem because excessive heating can first lead to deformation and then possibly destruction of the winding and the separator. The fact that the horizontal deflection coils do not rest directly on the face 11 but on the support edges 20, 21, 22 allows air circulation between the separator and the coils which contributes to their cooling.

L'exemple de l'application de l'invention à un déviateur dont les bobines de déviations horizontale et verticale sont en forme de selle n'est pas limitatif; l'invention peut également être mise en oeuvre sans difficulté dans des déviateurs de type selle/tore, c'est-à-dire comportant des bobines de déviation horizontale en forme de selle et des bobines de déviation verticale disposées autour de l'anneau en matériau ferromagnétique 5.The example of the application of the invention to a deflector whose coils of horizontal and vertical deflections are in the form of a saddle is not limiting; the invention can also be implemented without difficulty in saddle / torus type deflectors, that is to say comprising saddle-shaped horizontal deflection coils and vertical deflection coils arranged around the ring in ferromagnetic material 5.

Claims (15)

Déviateur pour tube à rayons cathodiques comprenant une paire de bobines de déviation verticale, une paire de bobines de déviation horizontale, 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 faces du séparateur comporte des arêtes de soutien sur lesquelles s'appuie l'une des deux paires de bobines.Diverter for cathode ray tube comprising a pair of vertical deflection coils, a pair of horizontal deflection coils, 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 faces of the separator has support edges on which one of the two pairs of coils is supported. Déviateur selon la revendication 1 caractérisé en ce que les arêtes de soutien s'étendent de l'avant vers l'arrière du séparateur.Diverter according to claim 1 characterized in that the support edges extend from the front to the rear of the separator. Déviateur selon la revendication 2 caractérisé en ce que chaque arête de soutien est disposée à l'intersection de la face du séparateur avec un plan radialDiverter according to claim 2 characterized in that each support edge is disposed at the intersection of the face of the separator with a radial plane Déviateur selon l'une des revendications précédentes caractérisé en ce que les arêtes de soutien sont disposées sur la face interne du séparateurDiverter according to one of the preceding claims, characterized in that the support edges are arranged on the internal face of the separator Déviateur selon la revendication 4 caractérisé en ce que la fréquence d'alimentation des bobines de déviation horizontale est au moins égale à 16KHzDiverter according to claim 4 characterized in that the supply frequency of the horizontal deflection coils is at least equal to 16KHz Déviateur selon l'une des revendications précédentes caractérisé en ce que certaines arêtes de soutien ne s'étendent pas avec une hauteur constanteDiverter according to one of the preceding claims, characterized in that certain support edges do not extend with a constant height Déviateur selon l'une des revendications précédentes caractérisée en ce que les arêtes de soutien sont principalement disposées sur la partie évasée du séparateurDiverter according to one of the preceding claims, characterized in that the support edges are mainly arranged on the flared part of the separator Déviateur suivant l'une quelconque des revendications précédentes caractérisé en ce que les arêtes de soutien sont disposées dans la partie arrière du séparateurDiverter according to any one of the preceding claims, characterized in that the support edges are arranged in the rear part of the separator Déviateur suivant l'une quelconque des revendications précédentes caractérisé en ce que les arêtes de soutien sont de longueur inégaleDiverter according to any one of the preceding claims, characterized in that the support edges are of unequal length Déviateur selon l'une quelconque des revendications précédentes caractérisé en ce que les bobines de déviation horizontale et verticale sont en forme de selle.Diverter according to any one of the preceding claims, characterized in that the horizontal and vertical deflection coils are in the form of a saddle. Déviateur selon l'une des revendications 1 à 9 caractérisé en ce que les bobines de déviation verticale sont de type toroïdal.Diverter according to one of Claims 1 to 9, characterized in that the vertical deflection coils are of the toroidal type. Déviateur selon l'une des revendications précédentes caractérisé en ce que les faces interne et externe du séparateur définissent un corps d'épaisseur constanteDiverter according to one of the preceding claims, characterized in that the internal and external faces of the separator define a body of constant thickness Déviateur selon l'une des revendications précédentes caractérisé en ce que la surface de la face interne et/ou externe est de révolutionDiverter according to one of the preceding claims, characterized in that the surface of the internal and / or external face is of revolution Déviateur selon l'une des revendications précédentes caractérisé en ce que le matériau constitutif des arêtes de soutien est différent de celui du séparateur.Diverter according to one of the preceding claims, characterized in that the material constituting the support edges is different from that of the separator. 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.
EP94401503A 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes Expired - Lifetime EP0690471B1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
EP94401503A EP0690471B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
DE69414698T DE69414698T2 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
AT94401503T ATE173561T1 (en) 1994-07-01 1994-07-01 ELECTRON BEAM DEFLECTION SYSTEM FOR CATHODE RAY TUBES
TW083108176A TW331647B (en) 1994-07-01 1994-09-05 Electron beam deflection system
US08/464,431 US5589729A (en) 1994-07-01 1995-06-05 Deflection yoke liner with support ridges
CZ19951684A CZ287564B6 (en) 1994-07-01 1995-06-27 Cathode-ray tube deflecting yoke
KR1019950017737A KR960005725A (en) 1994-07-01 1995-06-28 Deflection yoke liner with support ridge
CA002153003A CA2153003C (en) 1994-07-01 1995-06-29 A deflection yoke liner with support ridges
SG1995000780A SG48690A1 (en) 1994-07-01 1995-06-30 A deflection yoke liner with support ridges
PL95309454A PL177264B1 (en) 1994-07-01 1995-06-30 Insert fro a set of crt deflection coils
CN95106890A CN1068707C (en) 1994-07-01 1995-06-30 A deflection yoke liner with support ridges
MYPI95001812A MY112914A (en) 1994-07-01 1995-06-30 A deflection yoke liner with support ridges
RU95110771/09A RU2216067C2 (en) 1994-07-01 1995-06-30 Deflection yoke for cathode-ray tube
JP7167357A JPH0850866A (en) 1994-07-01 1995-07-03 Deflecting yoke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94401503A EP0690471B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes

Publications (2)

Publication Number Publication Date
EP0690471A1 true EP0690471A1 (en) 1996-01-03
EP0690471B1 EP0690471B1 (en) 1998-11-18

Family

ID=8218024

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401503A Expired - Lifetime EP0690471B1 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes

Country Status (14)

Country Link
US (1) US5589729A (en)
EP (1) EP0690471B1 (en)
JP (1) JPH0850866A (en)
KR (1) KR960005725A (en)
CN (1) CN1068707C (en)
AT (1) ATE173561T1 (en)
CA (1) CA2153003C (en)
CZ (1) CZ287564B6 (en)
DE (1) DE69414698T2 (en)
MY (1) MY112914A (en)
PL (1) PL177264B1 (en)
RU (1) RU2216067C2 (en)
SG (1) SG48690A1 (en)
TW (1) TW331647B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2795231A1 (en) * 1999-06-18 2000-12-22 Thomson Tubes & Displays Electron beam deflector in CRT, has separator with cylindrical portion defining zone whose cross section in plane orthogonal to Z-axis is set, so that radius of curvature of inner periphery is minimum at two points
SG97754A1 (en) * 1996-03-08 2003-08-20 Thomson Tubes & Displays Electron-beam deflection system for a cathode-ray tube

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KR20010089758A (en) * 1999-11-04 2001-10-08 요트.게.아. 롤페즈 Deflection unit for a cathode ray tube and method of manufacturing a saddle-shaped deflection coil
CN113709957B (en) * 2021-08-27 2022-04-01 泛华检测技术有限公司 Small high-energy X-ray device and method

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0794551A1 (en) * 1996-03-08 1997-09-10 THOMSON TUBES &amp; DISPLAYS S.A. Electron beam deflection system for a cathode ray tube
US5818159A (en) * 1996-03-08 1998-10-06 Thomson Tubes And Displays, S.A. Electron beam deflection system for a cathode ray tube
SG97754A1 (en) * 1996-03-08 2003-08-20 Thomson Tubes & Displays 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
FR2751786A1 (en) * 1996-07-25 1998-01-30 Thomson Tubes & Displays DEVIATOR FIXING DEVICE ON THE NECK OF A CATHODIC RADIUS TUBE
US5923117A (en) * 1996-07-25 1999-07-13 Thomson Tubes And Displays, S.A. Deflection yoke securing device
FR2795231A1 (en) * 1999-06-18 2000-12-22 Thomson Tubes & Displays Electron beam deflector in CRT, has separator with cylindrical portion defining zone whose cross section in plane orthogonal to Z-axis is set, so that radius of curvature of inner periphery is minimum at two points
WO2000079563A1 (en) * 1999-06-18 2000-12-28 Thomson Tubes & Displays S.A. Deflection device for cathode ray tube

Also Published As

Publication number Publication date
RU95110771A (en) 1997-06-27
JPH0850866A (en) 1996-02-20
US5589729A (en) 1996-12-31
MY112914A (en) 2001-10-31
CZ287564B6 (en) 2000-12-13
ATE173561T1 (en) 1998-12-15
PL177264B1 (en) 1999-10-29
CN1068707C (en) 2001-07-18
PL309454A1 (en) 1996-01-08
TW331647B (en) 1998-05-11
CZ168495A3 (en) 1996-02-14
SG48690A1 (en) 1998-05-18
CN1123462A (en) 1996-05-29
CA2153003C (en) 2005-10-18
DE69414698T2 (en) 1999-04-08
EP0690471B1 (en) 1998-11-18
DE69414698D1 (en) 1998-12-24
KR960005725A (en) 1996-02-23
CA2153003A1 (en) 1996-01-02
RU2216067C2 (en) 2003-11-10

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