EP0690471B1 - 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
EP0690471B1
EP0690471B1 EP94401503A EP94401503A EP0690471B1 EP 0690471 B1 EP0690471 B1 EP 0690471B1 EP 94401503 A EP94401503 A EP 94401503A EP 94401503 A EP94401503 A EP 94401503A EP 0690471 B1 EP0690471 B1 EP 0690471B1
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EP
European Patent Office
Prior art keywords
separator
coils
deflection
deflection yoke
yoke according
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
EP94401503A
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German (de)
French (fr)
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EP0690471A1 (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 DE69414698T priority Critical patent/DE69414698T2/en
Priority to EP94401503A priority patent/EP0690471B1/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 MYPI95001812A priority patent/MY112914A/en
Priority to SG1995000780A priority patent/SG48690A1/en
Priority to RU95110771/09A priority patent/RU2216067C2/en
Priority to PL95309454A priority patent/PL177264B1/en
Priority to CN95106890A priority patent/CN1068707C/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

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 beam deflection system electronics for cathode ray tube, and more particularly 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, is generally consisting of a pair of vertical deflection coils, a pair of horizontal deflection coils and a substantially shaped ring frustoconical in magnetic material intended to concentrate the flux created by the coils. The two pairs of deflection coils are insulated electrically by a separator, generally made of plastic, which further improves the mechanical rigidity of the device deflection, fix the coils relative to each other and adjust the assembly on the neck of the tube. The separator consists of a body main, in one or more parts, substantially funnel-shaped, and a flexible rear part matching the neck of the tube and intended to fix the position of the deflection system along the longitudinal axis of the tube; this fixing is generally carried out thanks to a clamping collar arranged 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
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 partie arrière des bobines de déflexion verticale est 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 est alors immobilisé de façon définitive.The rear part of the vertical deflection coils is immobilized so that the position of the ferromagnetic ring is precisely adjusted so that the fields created by the deflection coils have the desired conformation to ensure the convergence of the beams electronic on 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 paroie externe du séparateur et la surface externe de la paire de bobines de déflexion horizontale repose sur la paroie 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 tube with cathode rays determine the shapes of the field lines and by that even the way the electron beams from the cannon are going to be deviated. In order to guarantee the shape of these coils, the internal surface of the pair of vertical deflection coils rests on the outer wall of the separator and the outer surface of the pair of deflection coils horizontal rests on the internal wall of the separator; so 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 not distort these.

D'après l'art antérieur, il est connu que les parois interne et externe du séparateur viennent au contact des bobines. Comme divulgué par exemple, par le document DE-B-1233067 , un séparateur conforme à l'état de la technique entoure étroitement les bobines de déviation ligne en forme de selle, et comporte deux arètes radiales s'étendant de l'avant à l'arrière du séparateur pour positionner les dites bobines sur sa surface interne, les bords extérieurs des bobines vennant aux contacts des bords latéraux de ces arètes.From the prior art, it is known that the internal and external walls of the separator come into contact with the coils. As disclosed for example, by document DE-B-1233067, a separator conforming to the state of the technique tightly surrounds the line-shaped deflection coils saddle, and has two radial ridges extending from the front to the back of the separator to position the said coils on its internal surface, the outer edges of the coils coming into contact with the side edges of these edges.

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

Il est également connu que le Brevet JP2012743 de disposer sur la surface externe du séparateur des arêtes destinées à faciliter la circulation d'air entre le séparateur et les bobines de déviation, ces arêtes étant disposées dans des plans perpendiculaires à l'axe principal de révolution du séparateur. Cependant, cette disposition rend difficile la fabrication de la pièce ainsi que son démoulage.It is also known that Patent JP2012743 to have on the surface outer of the edge separator to facilitate air circulation between the separator and the deflection coils, these edges being arranged in planes perpendicular to the main axis of revolution of the separator. However, this provision makes it difficult to manufacture the piece and its release.

L'épaisseur du séparateur pouvait être constante; dans ce cas la fabrication du séparateur s'en trouvait simplifié, mais cette caractéristique devait être intégrée au niveau de la conception des bobines de déflexion où elle constitue 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 separator was simplified, but this feature should be integrated in the design of the deflection coils where it constitutes a constraint which does not allow the forms of said to be optimized coils and thereby the fields created by these coils.

L'invention entend proposer un séparateur dont les parois interne et externe 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 ou 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 au moins une des parois du séparateur comportant des arêtes de soutien sur laquelle s'appuie l'une des deux paires de bobines, caractérisé en ce que lesdites arêtes s'étendent de l'avant vers l'arrière du séparateur et sont disposées à l'intersection de la paroi du séparateur avec des plans radiaux.The invention intends to propose a separator whose internal and external walls are simple in design and allow the forms to be separated from the internal surface of the vertical deflection coils and shapes of the outer surface of the horizontal deflection coils. For that the diverter incorporating the invention comprises a pair of coils of vertical deflection, a pair of horizontal deflection coils, a rigid separator isolating one or the other the pairs of deflection coils and a ring of ferromagnetic material of substantially shaped frustoconical arranged above at least part of the coils of deflection of at least one of the walls of the separator having edges of support on which one of the two pairs of coils is supported, characterized in that said edges extend from the front towards the rear of the separator and are arranged at the intersection of the separator wall with planes radial.

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
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

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.FIG. 1 represents a deflection system 1 comprising a pair of saddle shaped horizontal deflection coils 3, a pair of coil vertical deflection 4, also saddle-shaped, isolated from the previous one 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 tube to cathode rays 6 in order to deflect the electronic rays coming from the cannon 7 so that they explore the entire screen surface 9 of the tube. The different components of system 1 can be kept in one position optimum adjustment by gluing and / or clipping, the separator 2 ensuring that 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, entraínant un poids et une consommation de matière excessifsIn the prior art, to have parts that are easier to manufacture, this thickness was chosen 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, chose to make these forms independent, the space between the two coils, that the separator had to fill was found thick variable; the internal and external faces of the separator by their complexity made it difficult to manufacture, with thicknesses in important places, resulting in a weight and consumption of excessive material

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 addition, in the latter case, any change in the shape of a pair of coils, to adapt it to new characteristics, requires modify the internal and / or external face of the separator and change 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 FIG. 2, the separator 2 has a front part A, used to maintain the front of the deflection coils horizontal 3 and the positioning of the diverter on the tube thanks to adjustable feet whose housings 30 are shown in the figure. The separator then has a flared intermediate portion 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 sides of the separator are designed to rotate and the distance between the two faces is constant in order to have a shape to make simple. 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, shaped saddle, are made independent of each other by making that the pair of horizontal deflection coils is not based 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 planes radials containing the axis Z with the face 11; this layout is chosen by because of the simplicity of making the manufacturing molds and because that it facilitates the placement of spoils necessary for demolding pieces. The radial arrangement also has the advantage of better tracking the forms deflection coils whose structure is defined radially, in bundles of wires arranged at precise angles. Alternatively, these support edges can be arranged in planes parallel to a main axes, as long as the surface of the teeth in contact with the coils constitute 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 edges of support 20, 20 '; it is indeed in this area that the coils of horizontal deflection can most deviate from deflection coil vertical. Certain support edges, such as edges 22, may however be located in the rear part in the form of a cylindrical ring separator, to support the rear bun of the deflection coil horizontal; other edges may extend from front to back like 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 according to the plans horizontal and vertical radials, the support edges are arranged on the face 11 following 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.Support edges can be made in the same step of molding as the separator and therefore in the same plastic material as this last; alternatively they can be arranged on the face 11 after molding the body of the separator and adhering to it for example by collage; in this case the material constituting the support edges can 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 tube screen diagonal manufactured by Thomson Tubes & Displays can thus, in certain places of the flared part B, reach a maximum height of 2mm, while the thickness of the separator itself is around 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 a modification of the horizontal deflection coils can be implemented work: it suffices to modify 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 entraínant un fort échauffement de ces dernières. L'évacuation des calories engendrées par cet échauffement pose un important problème car un échauffement excessif peut entraíner 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 is appeared desirable to have a line scanning frequency of this order, or better 32KHz or even 64KHz. At these frequencies, consumption in energy of the coils is very important resulting in a strong overheating of the latter. The evacuation of the calories generated by this heating up poses an important problem because a heating up excessive can lead to deformation first and then possibly destruction of the winding and the separator. The fact that the coils of horizontal deviation does not rest directly on face 11 but on the support edges 20, 21, 22 allow air circulation between the separator and 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 diverter whose coils horizontal and vertical deviations are saddle shaped is not limiting; the invention can also be implemented without difficulty in saddle / toroidal deflectors, that is to say comprising horizontal deflection saddle-shaped coils and coils vertical deflection arranged around the material ring ferromagnetic 5.

Claims (13)

  1. Deflection yoke for a cathode-ray tube comprising a pair of vertical-deflection coils (4), a pair of horizontal-deflection coils (3), a rigid separator (2) isolating the pairs of deflection coils from each other and a ring of ferromagnetic material (5) of substantially frustoconical shape placed on top of at least one part of the deflection coils, at least one of the faces (10, 11) of the separator (2) having support ridges (20, 20', 21, 21', 21", 22) on which at least one part of that surface of each of the coils, which lies opposite said face of the separator bears, characterized in that said ridges (20, 20', 21, 21', 21", 22) extend from the front of the separator to the rear and lie at the intersection of the wall of the separator with radial planes.
  2. Deflection yoke according to the preceding claim, characterized in that the support ridges (20, 20', 21, 21', 21", 22) lie on the internal wall (11) of the separator.
  3. Deflection yoke according to the preceding claim, characterized in that the supply frequency for the horizontal-deflection coils (3) is at least equal to 16 kHz.
  4. Deflection yoke according to one of the preceding claims, characterized in that some of the support ridges (20, 20', 21, 21', 21", 22) do not extend with a constant height.
  5. Deflection yoke according to one of the preceding claims, characterized in that the support ridges (20, 20', 21, 21', 21", 22) lie mainly on the flared part of the separator.
  6. Deflection yoke according to any one of the preceding claims, characterized in that the support ridges (20, 20', 21, 21', 21", 22) lie on the wall of the separator symmetrically with respect to the horizontal plane XZ.
  7. Deflection yoke according to any one of the preceding claims, characterized in that the support ridges (20, 20', 21, 21', 21", 22) lie on the wall of the separator symmetrically with respect to the vertical plane YZ.
  8. Deflection yoke according to any one of the preceding claims, characterized in that the horizontal-deflection (3) and vertical-deflection (4) coils are saddle-shaped.
  9. Deflection yoke according to one of Claims 1 to 7, characterized in that the vertical-deflection coils (4) are of toroidal type.
  10. Deflection yoke according to one of the preceding claims, characterized in that the internal (11) and external (10) walls of the separator (2) define a body having a constant thickness.
  11. Deflection yoke according to one of the preceding claims, characterized in that the surface of the internal wall (11) and/or external wall (10) is/are axisymmetric.
  12. Deflection yoke according to one of the preceding claims, characterized in that the material of which the support ridges (20, 20', 21, 21', 21", 22) is made is different from that of the separator.
  13. Cathode-ray tube the deflection yoke of which is 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
DE69414698T DE69414698T2 (en) 1994-07-01 1994-07-01 Electron beam deflection system for cathode ray tubes
EP94401503A EP0690471B1 (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
MYPI95001812A MY112914A (en) 1994-07-01 1995-06-30 A deflection yoke liner with support ridges
SG1995000780A SG48690A1 (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
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
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 EP0690471A1 (en) 1996-01-03
EP0690471B1 true 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)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0794551B1 (en) * 1996-03-08 2001-09-19 THOMSON TUBES &amp; DISPLAYS S.A. Electron beam deflection system for a cathode ray tube
DE69615334T2 (en) * 1996-03-08 2002-05-16 Thomson Tubes & Displays 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
FR2795231B1 (en) * 1999-06-18 2001-08-17 Thomson Tubes & Displays DEFLECTION DEVICE FOR CATHODE RAY TUBE
EP1147542A1 (en) * 1999-11-04 2001-10-24 Koninklijke Philips Electronics N.V. 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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Publication number Priority date Publication date Assignee Title
DE1233067B (en) * 1964-02-05 1967-01-26 Telefunken Patent Deflection coil unit for televisions
JPS5540688Y2 (en) * 1975-12-24 1980-09-22
NL7908000A (en) * 1979-11-01 1981-06-01 Philips Nv DEFLECTION Yoke.
US4338584A (en) * 1980-11-24 1982-07-06 Rca Corporation Television deflection yoke mount
DE3767330D1 (en) * 1986-03-19 1991-02-21 Toshiba Kawasaki Kk DEFLECTION DEVICE FOR A CATHODE RAY TUBE.
NL8601501A (en) * 1986-06-10 1988-01-04 Philips Nv ELECTROMAGNETIC DEFLECTOR WIRED DIRECTLY ON A CARRIER.
NL8602377A (en) * 1986-09-22 1988-04-18 Philips Nv METHOD FOR MANUFACTURING A CATHODE JET TUBE.
NL8602407A (en) * 1986-09-24 1988-04-18 Philips Nv ELECTROMAGNETIC DEFLECTOR.
KR890006376Y1 (en) * 1987-09-30 1989-09-21 삼성전기 주식회사 Coil separator of deflection yoke
JPH01176639A (en) * 1987-12-29 1989-07-13 Matsushita Electron Corp Deflection yoke
JPH0212743A (en) * 1988-06-30 1990-01-17 Toshiba Corp Deflection yoke
KR930000791B1 (en) * 1989-11-09 1993-02-04 미쯔비시덴끼 가부시끼가이샤 Deflection yoke
JPH048247U (en) * 1990-04-28 1992-01-24
JPH0473842A (en) * 1990-07-12 1992-03-09 Matsushita Electric Ind Co Ltd Deflection yoke
JPH0487240A (en) * 1990-07-30 1992-03-19 Matsushita Electron Corp Deflecting yoke
JP2946716B2 (en) * 1990-10-05 1999-09-06 松下電器産業株式会社 Deflection yoke
JPH0740296Y2 (en) * 1991-03-19 1995-09-13 松下電器産業株式会社 Deflection coil
JPH04370629A (en) * 1991-06-19 1992-12-24 Toshiba Corp Deflection yoke device
KR100260802B1 (en) * 1991-11-01 2000-07-01 요트.게.아. 롤페즈 Display tube with deflection unit comprising field deflection coil of the semi-saddle type

Also Published As

Publication number Publication date
RU95110771A (en) 1997-06-27
CN1123462A (en) 1996-05-29
DE69414698D1 (en) 1998-12-24
CZ168495A3 (en) 1996-02-14
KR960005725A (en) 1996-02-23
CA2153003C (en) 2005-10-18
SG48690A1 (en) 1998-05-18
CN1068707C (en) 2001-07-18
TW331647B (en) 1998-05-11
ATE173561T1 (en) 1998-12-15
JPH0850866A (en) 1996-02-20
PL309454A1 (en) 1996-01-08
MY112914A (en) 2001-10-31
RU2216067C2 (en) 2003-11-10
PL177264B1 (en) 1999-10-29
EP0690471A1 (en) 1996-01-03
CA2153003A1 (en) 1996-01-02
US5589729A (en) 1996-12-31
DE69414698T2 (en) 1999-04-08
CZ287564B6 (en) 2000-12-13

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