EP0988643A1 - Plasma panel with cell conditioning effect - Google Patents

Plasma panel with cell conditioning effect

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Publication number
EP0988643A1
EP0988643A1 EP98929503A EP98929503A EP0988643A1 EP 0988643 A1 EP0988643 A1 EP 0988643A1 EP 98929503 A EP98929503 A EP 98929503A EP 98929503 A EP98929503 A EP 98929503A EP 0988643 A1 EP0988643 A1 EP 0988643A1
Authority
EP
European Patent Office
Prior art keywords
plasma panel
barriers
panel according
confinement
slabs
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
EP98929503A
Other languages
German (de)
French (fr)
Other versions
EP0988643B1 (en
Inventor
Guy Thomson-CSF Propr. Int. Dépt. BARET
Agide Thomson-CSF Propr. Int. Dépt. MOI
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.)
Technicolor SA
Original Assignee
Thomson Multimedia SA
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Publication date
Application filed by Thomson Multimedia SA filed Critical Thomson Multimedia SA
Publication of EP0988643A1 publication Critical patent/EP0988643A1/en
Application granted granted Critical
Publication of EP0988643B1 publication Critical patent/EP0988643B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/10—AC-PDPs with at least one main electrode being out of contact with the plasma
    • H01J11/12—AC-PDPs with at least one main electrode being out of contact with the plasma with main electrodes provided on both sides of the discharge space
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J11/00—Gas-filled discharge tubes with alternating current induction of the discharge, e.g. alternating current plasma display panels [AC-PDP]; Gas-filled discharge tubes without any main electrode inside the vessel; Gas-filled discharge tubes with at least one main electrode outside the vessel
    • H01J11/20—Constructional details
    • H01J11/34—Vessels, containers or parts thereof, e.g. substrates
    • H01J11/36—Spacers, barriers, ribs, partitions or the like

Definitions

  • the invention relates to plasma panels, and more particularly to means making it possible to obtain a so-called "cell conditioning" effect.
  • Plasma panels are image viewing screens of the" flat screen "type.
  • PAPs There are two main families of PAPs: PAPs whose operation is of the continuous type, and those whose operation is of the alternative type. All these PAPs operate on the principle of a gas discharge accompanied by an emission of light. They generally comprise two insulating slabs, each carrying one or more networks of electrodes, and delimiting between them a space filled with gas. The slabs are joined together so that the electrode arrays are orthogonal. Each intersection of electrodes defines a cell to which a gas space corresponds.
  • FIG. 1 shows by way of example, in a partial and simplified manner, a conventional structure of alternative color PAP.
  • alternative PAP there are different types of alternative PAP, among which, for example, may be mentioned: those of the type using only two crossed electrodes to define and control a cell, as described in particular in a French patent published with the number 2,417,848; or those of the type called "coplanar structure" whose structure and operation are described for example in European patent document EP-A-0.135.382.
  • Alternative PAPs have a common characteristic, which is to present an internal memory effect in operation, due to the fact that their electrodes are coated with a layer of dielectric material which isolates them from the gas, that is to say from the discharge. .
  • the PAP is of the type with two crossed electrodes to define a cell. It comprises two substrates or panels 2, 3, one of which is a front plate 2, i.e. the slab which is on the side of an observer (not shown); this slab carries a first network of electrodes called "line electrodes" of which only 3 electrodes Y1, Y2, Y3 are shown.
  • the line electrodes Y1 to Y3 are covered with a layer 5 of a dielectric material.
  • the second panel 3 forms the rear panel, it is opposite to the observer and therefore it is it which preferably is provided with elements capable of preventing the transmission of light to the observer; it carries a second network of electrodes called “column electrodes” of which only 5 electrodes X1 to X5 are shown.
  • the two tiles 2, 3 are made of the same material, generally glass. These two tiles 2, 3 are intended to be joined to each other, so that the array of row and column electrodes are orthogonal to each other.
  • the column electrodes X1 to X5 are also covered with a layer 6 of dielectric material.
  • the dielectric layer 6 is itself covered with layers forming strips 7, 8, 9 of phosphor materials, corresponding for example to the colors green, red and blue respectively. are arranged parallel to the column electrodes X1 to X5, above the latter from which they are separated by the dielectric layer 6.
  • the rear slab 3 also comprises barriers 11, parallel to the phosphor strips 7, 8 , 9 and arranged between them.
  • the PAP is formed by assembling the front and rear tiles 2, 3, an assembly which produces a matrix of cells C1 to Cn.
  • the cells are then defined at the intersection each between a row electrode Y1 to Y3 and a column electrode X1 to X5.
  • Each cell has a discharge zone, the cross section of which corresponds substantially to so-called “useful” surfaces formed by the facing surfaces of the two crossed electrodes.
  • the discharge in the gas generates electric charges which, in the case of an 'alternative' PAP accumulates on the dielectrics 5, 6 with regard to the row and column electrodes; in the example shown, this is obtained at the level of the rear panel 3 using savings Ep1 to Epn, produced in the phosphor strips 7, 8, 9 substantially in line with the useful surfaces of the column electrodes X1 to X5.
  • the intersections produced by the first row electrode Y1 with the column electrodes X1 to X5 define a row of cells, each cell being materialized by a saving: the first cell C1 is located at the level of the first saving Ep1 , the second cell C2 is located at the level of the second savings Ep2 and so on until the fifth savings Ep5 which materializes a fifth cell C5.
  • the first, second and third savings Ep1, Ep2, Ep3 are located respectively in a green phosphor band 7, red 8 and blue 9, they thus correspond to monochrome cells of three different colors which together can constitute a trichrome cell.
  • the quality of the discharges in each cell depends on the geometric and dimensional characteristics of the cells, and the overall quality of operation of the PAP requires that these characteristics be reproduced with a low dispersion for all the cells. of the PAP.
  • One of these particularly important characteristics is the height of the gas space formed between the front and rear tiles 2, 3, when these are assembled to one another.
  • the load-bearing barriers 11 therefore having the same height H1 as the space which separates the slabs 2, 3, they constitute relatively watertight partitions so that, in addition to their bracing function mentioned above, they perform another function so-called "confinement"
  • This confinement function is well known, it consists notably on the one hand, of confining the discharge, ie of preventing its propagation towards neighboring unaddressed cells, and therefore of avoiding a crosstalk effect between cells; and on the other hand, to avoid that the ultraviolet radiation created by a discharge in a given cell excites the phosphors of adjacent cells and does not cause a lack of color saturation, this phenomenon being known as an effect
  • the load-bearing barriers 11 being arranged so as to separate two phosphor strips 7, 8, 9 of different colors according to a so-called 'triad' structure, they perform these functions only between cells located along the same line electrode Y1 to Y3, as for cells C1 to C5.
  • the present invention aims to allow in a PAP, the establishment of confinement and cell conditioning functions mentioned above, in a simple manner and without affecting the consistency of the spacing between the two tiles of the PAP. To this end, it proposes, in particular to decouple the function of bracing the slabs from that of confining the cells, so as to be able to measure the action of the means used for confinement.
  • a plasma panel comprising two parallel slabs assembled to each other, at least two networks of electrodes defining cells, bracing means determining a distance between the slabs, means cell containment, is characterized in that the containment means are barriers whose height is perpendicular to the slabs, said height being less than the distance between the slabs.
  • FIG. 2 shows a color plasma panel according to the invention.
  • FIG. 2 shows in a simplified manner, by a view similar to that of FIG. 1, a plasma panel according to the invention, comprising a front panel 2a and a rear panel 3a.
  • the PAP according to the invention is of a type similar to that of FIG. 1: in fact the front panel 2a is, in the example, identical to the front face 2 of FIG. 1 , the only differences with the prior art are shown at the rear face 3a, and relate to bracing means and confinement means.
  • the rear panel 3a therefore comprises, in the same way as the rear panel 3 in FIG. 1, column electrodes X1 to X5 covered with a dielectric layer 6, itself covered by phosphor elements in the form of strips 7, 8 , 9 successive; as for the rear face 3 of FIG. 1, these bands 7, 8, 9 are parallel to the column electrodes X1 to X5 and include spares Ep1 to Epn which each materialize a cell C1 to Cn.
  • the bracing means which determine the spacing distance between the two slabs 2a and 3a, are constituted by a network of balls or spheres of which only four balls S1, S2, S3, S4 are shown in FIG. 2.
  • the bracing balls S1 to S4 are made of an electrically non-conductive material, glass or sapphire for example; it should be noted that such balls with diameters compatible with those required in this application (of the order of, for example, 150 micrometers), are fairly commonly used in industry.
  • the confinement of cells C1 to Cn is obtained in a more limited manner than in the prior art, using confinement barriers B1, B2, ..., B5 having a height H2 less than the distance between the slabs, that is to say the diameter D1 of the balls S1 to S4.
  • the confinement barriers B1 to B5 are arranged in the same way as the carrier barriers 11 of FIG. 1, that is to say parallel to the column electrodes X1 to X5 and so as to separate two contiguous phosphor strips 7, 8, 9 , these two phosphor strips having different colors.
  • the barriers can thus fulfill confinement functions (as has been explained above), that is to say to slow down or even avoid the propagation of discharges from one cell to a neighboring cell, and constitute an isolation suitable for optically isolating a cell from the radiation emitted by neighboring cells of different colors.
  • the barriers B1 to B5 must for this purpose have a height H2 sufficient to obtain this confinement, while providing between the top of these barriers B1 to B5 and the front slab 2a, sufficient space to allow an exchange between neighboring cells, exchange which allows the cell conditioning effect already explained.
  • This useful space for obtaining the conditioning effect corresponds to a height H3, given by the difference between the diameter D1 of the balls S1 to S4 and the height H2 of the confinement barriers B1 to B5.
  • the value H3 of the free space between the barriers B1 to B5 and the front panel 2a can vary according to technological conditions specific to the PAP, and it can be defined by experimentation. However, tests show that in a large number of cases, correct operation is obtained by giving the containment barriers B1 to B5, a height H2 of between approximately 65% and 85% of the diameter D1 of the balls S1 to S4.
  • containment barriers B1 to B5 could also be adopted for another network of containment barrier (not shown), another network whose barriers extend perpendicularly to the barriers B1 to B5, so to form intertwined barriers therewith.
  • a first and a second ball S1, S2 are placed respectively between the first and the second barriers B1, B2, and between the fourth and the fifth barriers B4, B5; these two balls S1, S2 are arranged along an axis 20 perpendicular to the confinement barriers B1 to B5, which axis is located substantially at equal distances between an edge 21 of the slab 3a and the savings Ep1 to Ep5.
  • a third ball S3 other spacer balls can be arranged along for example a second axis 22, parallel to the first axis 20 and located between the savings Ep6 and Epn.
  • the spacer balls can of course be arranged differently, the number and distribution of these balls on the surface of a slab 2a, 3a being determined for example as a function of the tolerance allowed on the value of the spacing D1 between the two tiles; the important thing is of course that the balls are placed between the cells and therefore not at the precise location of a cell so as not to harm the discharge.
  • the confinement barriers B1 to B5 are integral with the slab which carries the phosphors (or the rear slab 3a in the example of FIG. 2), so as to provide a space H3 between their top and the other slab.
  • This structure with confinement barriers of height less than the spacing distance of the slabs makes it possible to significantly reduce the evacuation time of the panel, which is appreciable during industrial manufacture.
  • the confinement barriers B1 to B5 can be produced according to a conventional method, similar to that used for the carrying barriers 11 shown in FIG. 1: they are then made of an electrically non-conductive material, resistant to crushing, such as glass. , enamel, ceramic, etc. But, according to another characteristic of the invention, the confinement barriers B1 to B5 can be made of a "soft" material, that is to say a material which can be crushed under the effect of pressure exercised particularly by the balls S1 to S4; in this case, the confinement barriers B1 to B5 can be constituted for example by a friable deposit of alumina powder or else of silica.
  • barriers B1 to B5 of the "furniture" type is that during the assembly of the front and rear tiles 2a, 3a, for each ball which possibly falls in front of a barrier, it can sink into the barrier without destroying it, as illustrated in FIG.
  • the balls can be held in their position until the tiles are assembled, for example by a resulting bonding a heating of the slab; - either place the network of balls S1 to S4 on the same slab 3a as the confinement barriers B1 to B5: in this case, the balls can be more easily placed between these barriers.
  • the "furniture" type barriers are crushed to allow one or more balls to penetrate, have the advantage of requiring less precision in positioning the network of balls, the network of barriers B1 to B5, and the relative positioning of the two slabs.

Abstract

The invention concerns plasma panels, more particularly means for obtaining so-called cell conditioning effect. A plasma panel comprises a front faceplate (2a) and a rear faceplate (3a), between which are constituted cells (C1 to Cn). The two faceplates are assembled together by bracing means (S1 to S4) which determine the distance (d1) between the two faceplates. The plasma panel further comprises barriers (B1 to B5) arranged between the two faceplates, and serving in particular to prevent the discharges of one cell from extending to the other neighbouring cells (C1 to Cn). The invention is characterised in that the height (H2) of the barriers (B1 to B5) is less than the distance (D1) between the faceplates (2a, 3a). This arrangement provides a conditioning effect to the cells (C1 to Cn) thereby enabling them to be activated more speedily. The invention is in particular applicable to plasma panels using luminophores of different colours.

Description

PANNEAU A PLASMA A EFFET DE CONDITIONNEMENT DE CELLULES PLASMA PANEL WITH CELL CONDITIONING EFFECT
L'invention concerne les panneaux à plasma, et plus particulièrement des moyens permettant d'obtenir un effet dit 'de conditionnement de cellules".The invention relates to plasma panels, and more particularly to means making it possible to obtain a so-called "cell conditioning" effect.
Les panneaux à plasma (appelés en abrégé PAP" dans la suite de la description) sont des écrans de visualisation d'image du type 'écran plat" Il existe deux grandes familles de PAP : les PAP dont le fonctionnement est du type continu, et ceux dont le fonctionnement est du type alternatif. Tous ces PAP fonctionnent sur le principe d'une décharge dans les gaz accompagnée d'une émission de lumière. Ils comportent généralement deux dalles isolantes, portant chacune un ou plusieurs réseaux d'électrodes, et délimitant entre elles un espace rempli de gaz. Les dalles sont assemblées l'une à l'autre de manière que les réseaux d'électrodes soient orthogonaux. Chaque intersection d'électrodes définit une cellule à laquelle correspond un espace gazeux. La figure 1 représente à titre d'exemple, de manière partielle et simplifiée, une structure classique de PAP alternatif couleur. Il est à noter que l'on trouve différents types de PAP alternatifs, parmi lesquels par exemple on peut citer : ceux du type utilisant seulement deux électrodes croisées pour définir et commander une cellule, comme décrit notamment dans un brevet français publié avec le n° 2 417 848 ; ou encore ceux du type appelé " à structure coplanaire " dont la structure et le fonctionnement sont décrits par exemple dans le document de brevet européen EP-A- 0.135.382. Les PAP alternatifs ont une caractéristique commune, qui est de présenter en fonctionnement un effet de mémoire interne, du au fait que leurs électrodes sont revêtues d'une couche d'un matériau diélectrique qui les isole du gaz c'est à dire de la décharge.Plasma panels (abbreviated as PAP "in the remainder of the description) are image viewing screens of the" flat screen "type. There are two main families of PAPs: PAPs whose operation is of the continuous type, and those whose operation is of the alternative type. All these PAPs operate on the principle of a gas discharge accompanied by an emission of light. They generally comprise two insulating slabs, each carrying one or more networks of electrodes, and delimiting between them a space filled with gas. The slabs are joined together so that the electrode arrays are orthogonal. Each intersection of electrodes defines a cell to which a gas space corresponds. FIG. 1 shows by way of example, in a partial and simplified manner, a conventional structure of alternative color PAP. It should be noted that there are different types of alternative PAP, among which, for example, may be mentioned: those of the type using only two crossed electrodes to define and control a cell, as described in particular in a French patent published with the number 2,417,848; or those of the type called "coplanar structure" whose structure and operation are described for example in European patent document EP-A-0.135.382. Alternative PAPs have a common characteristic, which is to present an internal memory effect in operation, due to the fact that their electrodes are coated with a layer of dielectric material which isolates them from the gas, that is to say from the discharge. .
Dans l'exemple de la figure 1 , le PAP est du type à deux électrodes croisées pour définir une cellule. Il comporte deux substrats ou dalles 2, 3, dont l'une est une dalle avant 2, c'est à dire la dalle qui est du côté d'un observateur (non représenté) ; cette dalle porte un premier réseau d'électrodes appelées 'électrodes lignes" dont seulement 3 électrodes Y1 , Y2, Y3 sont représentées. Les électrodes lignes Y1 à Y3 sont recouvertes d'une couche 5 d'un matériau diélectrique. La seconde dalle 3 forme la dalle arrière, elle est à l'opposé de l'observateur et par conséquent, c'est elle qui de préférence est munie des éléments susceptibles d'empêcher la transmission de la lumière vers l'observateur ; elle porte un second réseau d'électrodes appelées 'électrodes colonnes" dont seulement 5 électrodes X1 à X5 sont représentées. Les deux dalles 2, 3, sont en un même matériau, généralement du verre. Ces deux dalles 2, 3 sont destinées à être assemblées l'une à l'autre, de façon que les réseaux d'électrodes lignes et colonnes soient orthogonaux l'un par rapport à l'autre. Sur la dalle arrière 3, les électrodes colonnes X1 à X5 sont elles aussi recouvertes d'une couche 6 de matériau diélectrique. La couche diélectrique 6 est elle-même recouverte de couches formant des bandes 7, 8, 9 de matériaux luminophores, correspondant par exemple respectivement aux couleurs vert, rouge et bleu. Les bandes luminophores 7, 8, 9 sont disposées parallèlement aux électrodes colonnes X1 à X5, au dessus de ces dernières dont elles sont séparées par la couche diélectrique 6. La dalle 3 arrière comporte en outre des barrières 11 , parallèles aux bandes luminophores 7, 8, 9 et disposées entre ces dernières.In the example of FIG. 1, the PAP is of the type with two crossed electrodes to define a cell. It comprises two substrates or panels 2, 3, one of which is a front plate 2, i.e. the slab which is on the side of an observer (not shown); this slab carries a first network of electrodes called "line electrodes" of which only 3 electrodes Y1, Y2, Y3 are shown. The line electrodes Y1 to Y3 are covered with a layer 5 of a dielectric material. The second panel 3 forms the rear panel, it is opposite to the observer and therefore it is it which preferably is provided with elements capable of preventing the transmission of light to the observer; it carries a second network of electrodes called “column electrodes” of which only 5 electrodes X1 to X5 are shown. The two tiles 2, 3 are made of the same material, generally glass. These two tiles 2, 3 are intended to be joined to each other, so that the array of row and column electrodes are orthogonal to each other. On the rear slab 3, the column electrodes X1 to X5 are also covered with a layer 6 of dielectric material. The dielectric layer 6 is itself covered with layers forming strips 7, 8, 9 of phosphor materials, corresponding for example to the colors green, red and blue respectively. are arranged parallel to the column electrodes X1 to X5, above the latter from which they are separated by the dielectric layer 6. The rear slab 3 also comprises barriers 11, parallel to the phosphor strips 7, 8 , 9 and arranged between them.
Le PAP est formé par l'assemblage des dalles avant et arrière 2, 3, assemblage qui réalise une matrice de cellules C1 à Cn. Les cellules sont alors définies à l'intersection chacune entre une électrode ligne Y1 à Y3 et une électrode colonne X1 à X5. Chaque cellule comporte une zone de décharge dont la section correspond sensiblement à des surfaces dites 'utiles" formées par les surfaces en regard des deux électrodes croisées. Pour chaque cellule, la décharge dans le gaz engendre des charges électriques qui, dans le cas d'un PAP 'alternatif,' s'accumulent sur les diélectriques 5, 6 au regard des électrodes lignes et colonnes ; dans l'exemple représenté, ceci est obtenu au niveau de la dalle arrière 3 à l'aide d'épargnes Ep1 à Epn, réalisées dans les bandes luminophores 7, 8, 9 sensiblement au droit des surfaces utiles des électrodes colonnes X1 à X5.The PAP is formed by assembling the front and rear tiles 2, 3, an assembly which produces a matrix of cells C1 to Cn. The cells are then defined at the intersection each between a row electrode Y1 to Y3 and a column electrode X1 to X5. Each cell has a discharge zone, the cross section of which corresponds substantially to so-called "useful" surfaces formed by the facing surfaces of the two crossed electrodes. For each cell, the discharge in the gas generates electric charges which, in the case of an 'alternative' PAP accumulates on the dielectrics 5, 6 with regard to the row and column electrodes; in the example shown, this is obtained at the level of the rear panel 3 using savings Ep1 to Epn, produced in the phosphor strips 7, 8, 9 substantially in line with the useful surfaces of the column electrodes X1 to X5.
Ainsi dans l'exemple représenté, les intersections réalisées par la première électrode ligne Y1 avec les électrodes colonnes X1 à X5 définissent une ligne de cellules, chaque cellule étant matérialisée par une épargne : la première cellule C1 est située au niveau de la première épargne Ep1 , la deuxième cellule C2 est située au niveau de la deuxième épargne Ep2 et ainsi de suite jusqu'à la cinquième épargne Ep5 qui matérialise une cinquième cellule C5. Les première, deuxième et troisième épargnes Ep1 , Ep2, Ep3 sont situées respectivement dans une bande luminophore verte 7, rouge 8 et bleue 9, elles correspondent ainsi à des cellules monochromes de trois couleurs différentes qui à elles trois peuvent constituer une cellule trichrome.Thus in the example shown, the intersections produced by the first row electrode Y1 with the column electrodes X1 to X5 define a row of cells, each cell being materialized by a saving: the first cell C1 is located at the level of the first saving Ep1 , the second cell C2 is located at the level of the second savings Ep2 and so on until the fifth savings Ep5 which materializes a fifth cell C5. The first, second and third savings Ep1, Ep2, Ep3 are located respectively in a green phosphor band 7, red 8 and blue 9, they thus correspond to monochrome cells of three different colors which together can constitute a trichrome cell.
La qualité des décharges dans chaque cellule, pour une valeur donnée de la tension appliquée aux électrodes, dépend des caractéristiques géométriques et dimensionπelles des cellules, et la qualité globale de fonctionnement du PAP exige que ces caractéristiques soient reproduites avec une faible dispersion pour toutes les cellules du PAP. L'une de ces caractéristiques particulièrement importantes, est la hauteur de l'espace gazeux formé entre les dalles avant et arrière 2, 3, quand celles-ci sont assemblées l'une à l'autre. D'une manière générale, dans les PAP couleurs qui par rapport aux PAP monochromes possèdent des luminophores leur permettant de produire des lumières de différentes couleurs, l'une des dimensions de l'espace gazeux ménagé entre les dalles 2, 3 correspond à la distance entre ces dalles, laquelle distance est donnée par la hauteur H1 des barrières 11 ; par suite ces barrières sont appelées barrières porteuses" Lors de l'assemblage des deux dalles 2, 3, ces dernières sont tenues écartées l'une de l'autre par les barrières porteuses 11 qui remplissent ainsi une fonction d'entretoise.The quality of the discharges in each cell, for a given value of the voltage applied to the electrodes, depends on the geometric and dimensional characteristics of the cells, and the overall quality of operation of the PAP requires that these characteristics be reproduced with a low dispersion for all the cells. of the PAP. One of these particularly important characteristics is the height of the gas space formed between the front and rear tiles 2, 3, when these are assembled to one another. In general, in colored PAPs which, compared to monochrome PAPs, have phosphors allowing them to produce lights of different colors, one of the dimensions of the gas space formed between the slabs 2, 3 corresponds to the distance between these slabs, which distance is given by the height H1 of the barriers 11; consequently these barriers are called load-bearing barriers "During the assembly of the two slabs 2, 3, the latter are kept apart from each other by the load-bearing barriers 11 which thus fulfill a spacer function.
Les barrières porteuses 11 ayant donc une même hauteur H1 que l'espace qui sépare les dalles 2, 3, elles constituent des cloisons relativement étanches de telle sorte que, en plus de leur fonction d'entretoisement citée plus haut, elles assurent une autre fonction dite 'de confinement" Cette fonction de confinement est bien connue, elle consiste notamment d'une part, à confiner la décharge c'est à dire à empêcher sa propagation vers des cellules voisines non adressées, et donc à éviter un effet de diaphonie entre cellules ; et d'autre part, à éviter que le rayonnement ultraviolet créé par une décharge dans une cellule donnée n'excite les luminophores de cellules adjacentes et n'engendre un manque de saturation des couleurs, ce phénomène étant connu en tant qu'effet de diaphotie. Il est à remarquer que dans l'exemple représenté à la figure 1 , les barrières porteuses 11 étant disposées de manière à séparer deux bandes luminophores 7, 8, 9 de couleurs différentes suivant une structure dite 'en triade" elles assurent ces fonctions seulement entre des cellules situées le long d'une même électrode ligne Y1 à Y3, comme pour les cellules C1 à C5. Cependant les auteurs de l'invention ont observé qu'un confinement trop poussé des cellules, pouvait dans certains cas nuire au fonctionnement du PAP, particulièrement quand des vitesses élevées d'allumage ou inscription des cellules sont nécessaires, comme dans le cas d'images de télévision par exemple. Ils ont pensé qu'une structure telle que celle représentée à la figure 1 , conduisait à un confinement total c'est à dire à une isolation totale entre deux cellules adjacentes de couleurs différentes, et que ce confinement total pouvait priver ces cellules du bénéfice de phénomènes de transferts, d'une cellule à l'autre, de charges (ions ou électrons du plasma) et/ou de photons ultraviolets susceptibles d'aider à l'amorçage d'une décharge dans le gaz.The load-bearing barriers 11 therefore having the same height H1 as the space which separates the slabs 2, 3, they constitute relatively watertight partitions so that, in addition to their bracing function mentioned above, they perform another function so-called "confinement" This confinement function is well known, it consists notably on the one hand, of confining the discharge, ie of preventing its propagation towards neighboring unaddressed cells, and therefore of avoiding a crosstalk effect between cells; and on the other hand, to avoid that the ultraviolet radiation created by a discharge in a given cell excites the phosphors of adjacent cells and does not cause a lack of color saturation, this phenomenon being known as an effect Note that in the example shown in Figure 1, the load-bearing barriers 11 being arranged so as to separate two phosphor strips 7, 8, 9 of different colors according to a so-called 'triad' structure, they perform these functions only between cells located along the same line electrode Y1 to Y3, as for cells C1 to C5. However, the authors of the invention have observed that too much confinement of the cells could in certain cases adversely affect the functioning of the PAP, particularly when high rates of ignition or registration of the cells are necessary, as in the case of television images for example. They thought that a structure such as that shown in FIG. 1, led to total confinement, that is to say to total isolation between two adjacent cells of different colors, and that this total confinement could deprive these cells of the benefit of transfer phenomena, from one cell to another, of charges (ions or electrons of the plasm a) and / or ultraviolet photons capable of helping to initiate a discharge in the gas.
Ces phénomènes réalisent un effet dit 'de conditionnement de cellules" qui ne peut se manifester que si la structure des cellules ménage un chemin dans l'espace gazeux entre deux cellules voisines, et ceci dans les deux directions c'est à dire parallèlement aux électrodes lignes et parallèlement aux électrodes colonnes. Ainsi le confinement total d'une cellule vis à vis des deux cellules voisines de couleurs différentes, interdit l'effet de conditionnement de cette cellule et réduit sa vitesse d'allumage.These phenomena achieve a so-called "cell conditioning" effect which can only manifest itself if the cell structure spares a path in the gas space between two neighboring cells, and this in both directions, ie parallel to the electrodes lines and parallel to the column electrodes, thus the total confinement of a cell with respect to the two neighboring cells of different colors, prevents the conditioning effect of this cell and reduces its ignition speed.
La présente invention a pour but de permettre dans un PAP, l'établissement des fonctions de confinement et de conditionnement de cellules ci-dessus mentionnées, de manière simple et sans nuire à la constance de l'espacement entre les deux dalles du PAP. Elle propose à cette fin, notamment de découpler la fonction d'entretoisement des dalles de celle de confinement des cellules, de manière à pouvoir doser l'action des moyens servant au confinement. Suivant l'invention, un panneau à plasma comportant deux dalles parallèles assemblées l'une à l'autre, au moins deux réseaux d'électrodes définissant des cellules, des moyens d'entretoisement déterminant une distance d'écartement entre les dalles, des moyens de confinement des cellules, est caractérisé en ce que les moyens de confinement sont des barrières dont la hauteur est perpendiculaire aux dalles, ladite hauteur étant inférieure à la distance d'écartement des dalles.The present invention aims to allow in a PAP, the establishment of confinement and cell conditioning functions mentioned above, in a simple manner and without affecting the consistency of the spacing between the two tiles of the PAP. To this end, it proposes, in particular to decouple the function of bracing the slabs from that of confining the cells, so as to be able to measure the action of the means used for confinement. According to the invention, a plasma panel comprising two parallel slabs assembled to each other, at least two networks of electrodes defining cells, bracing means determining a distance between the slabs, means cell containment, is characterized in that the containment means are barriers whose height is perpendicular to the slabs, said height being less than the distance between the slabs.
L'invention sera mieux comprise à la lecture de la description qui suit, faite à titre d'exemple non limitatif en référence aux figures annexées, parmi lesquelles :The invention will be better understood on reading the description which follows, given by way of nonlimiting example with reference to the appended figures, among which:
- la figure 1 déjà décrite représente une structure classique de panneau à plasma couleur ;- Figure 1 already described shows a conventional structure of color plasma panel;
- la figure 2 représente un panneau à plasma couleur conforme à l'invention. La figure 2 représente de façon simplifiée, par une vue semblable à celle de la figure 1 , un panneau à plasma suivant l'invention, comportant une dalle avant 2a et une dalle arrière 3a. Dans l'exemple non limitatif représenté, le PAP suivant l'invention est d'un type semblable à celui de la figure 1 : en fait la dalle avant 2a est, dans l'exemple, identique à la face avant 2 de la figure 1 , les seules différences avec l'art antérieur sont représentées au niveau de la face arrière 3a, et portent sur des moyens d'entretoisement et des moyens de confinement.- Figure 2 shows a color plasma panel according to the invention. FIG. 2 shows in a simplified manner, by a view similar to that of FIG. 1, a plasma panel according to the invention, comprising a front panel 2a and a rear panel 3a. In the nonlimiting example shown, the PAP according to the invention is of a type similar to that of FIG. 1: in fact the front panel 2a is, in the example, identical to the front face 2 of FIG. 1 , the only differences with the prior art are shown at the rear face 3a, and relate to bracing means and confinement means.
La dalle arrière 3a comporte donc, d'une même façon que la dalle arrière 3 de la figure 1 , des électrodes colonnes X1 à X5 couvertes d'une couche diélectrique 6, elle même couverte par des éléments luminophores sous formes de bandes 7, 8, 9 successives ; comme pour la face arrière 3 de la figure 1 , ces bandes 7, 8, 9 sont parallèles aux électrodes colonnes X1 à X5 et comportent des épargnes Ep1 à Epn qui matérialisent chacune une cellule C1 à Cn. Suivant une caractéristique de l'invention, les moyens d'entretoisement qui déterminent la distance d'écartement entre les deux dalles 2a et 3a, sont constitués par un réseau de billes ou sphères dont seulement quatre billes S1 , S2, S3, S4 sont représentées sur la figure 2. Lors de l'assemblage des dalles avant et arrière 2a, 3a, ces deux dalles sont maintenues l'une contre l'autre par l'intermédiaire des billes d'entretoisement S1 à S4, de telle sorte que la distance d'écartement entre ces dalles 2a, 3a est donnée par le diamètre D1 des billes. Bien entendu les billes S1 à S4 sont en un matériau non conducteur électrique, verre ou saphir par exemple ; il est à noter que de telles billes avec des diamètres compatibles à ceux nécessaires dans cette application (de l'ordre par exemple de 150 micromètres), sont assez couramment utilisées dans l'industrie.The rear panel 3a therefore comprises, in the same way as the rear panel 3 in FIG. 1, column electrodes X1 to X5 covered with a dielectric layer 6, itself covered by phosphor elements in the form of strips 7, 8 , 9 successive; as for the rear face 3 of FIG. 1, these bands 7, 8, 9 are parallel to the column electrodes X1 to X5 and include spares Ep1 to Epn which each materialize a cell C1 to Cn. According to a characteristic of the invention, the bracing means which determine the spacing distance between the two slabs 2a and 3a, are constituted by a network of balls or spheres of which only four balls S1, S2, S3, S4 are shown in FIG. 2. During the assembly of the front and rear slabs 2a, 3a, these two slabs are held one against the other by means of the bracing balls S1 to S4, so that the spacing distance between these slabs 2a, 3a is given by the diameter D1 of the balls. Of course the balls S1 to S4 are made of an electrically non-conductive material, glass or sapphire for example; it should be noted that such balls with diameters compatible with those required in this application (of the order of, for example, 150 micrometers), are fairly commonly used in industry.
Suivant une autre caractéristique de l'invention, le confinement de cellules C1 à Cn est obtenu d'une manière plus limitée que dans l'art antérieur, à l'aide de barrières de confinement B1, B2, ..., B5 ayant une hauteur H2 inférieure à la distance d'écartement des dalles, c'est-à-dire au diamètre D1 des billes S1 à S4. Les barrières de confinement B1 à B5 sont disposées d'une même manière que les barrières porteuses 11 de la figure 1 , c'est à dire parallèlement aux électrodes colonnes X1 à X5 et de manière à séparer deux bandes luminophores 7, 8, 9 contiguës, ces deux bandes luminophores ayant des couleurs différentes. Les barrières peuvent ainsi remplir des fonctions de confinement (comme il a été précédemment expliqué), c'est à dire freiner voire éviter la propagation des décharges d'une cellule à une cellule voisine, et constituer une isolation propre à isoler optiquement une cellule du rayonnement émis par des cellules voisines de couleurs différentes.According to another characteristic of the invention, the confinement of cells C1 to Cn is obtained in a more limited manner than in the prior art, using confinement barriers B1, B2, ..., B5 having a height H2 less than the distance between the slabs, that is to say the diameter D1 of the balls S1 to S4. The confinement barriers B1 to B5 are arranged in the same way as the carrier barriers 11 of FIG. 1, that is to say parallel to the column electrodes X1 to X5 and so as to separate two contiguous phosphor strips 7, 8, 9 , these two phosphor strips having different colors. The barriers can thus fulfill confinement functions (as has been explained above), that is to say to slow down or even avoid the propagation of discharges from one cell to a neighboring cell, and constitute an isolation suitable for optically isolating a cell from the radiation emitted by neighboring cells of different colors.
Les barrières B1 à B5 doivent à cet effet posséder une hauteur H2 suffisante à obtenir ce confinement, tout en ménageant entre le sommet de ces barrières B1 à B5 et la dalle avant 2a, un espace suffisant pour permettre un échange entre cellules voisines, échange qui permet l'effet de conditionnement de cellules déjà expliqué. Cet espace utile à obtenir l'effet de conditionnement correspond à une hauteur H3, donnée par la différence entre le diamètre D1 des billes S1 à S4 et la hauteur H2 des barrières de confinement B1 à B5. La valeur H3 de l'espace libre entre les barrières B1 à B5 et la dalle avant 2a, peut varier en fonction de conditions technologiques propres au PAP, et elle peut être définie par expérimentation. Cependant des essais montrent que dans un grand nombre de cas, un fonctionnement correct est obtenu en conférant aux barrières de confinement B1 à B5, une hauteur H2 comprise entre environ 65% et 85% du diamètre D1 des billes S1 à S4.The barriers B1 to B5 must for this purpose have a height H2 sufficient to obtain this confinement, while providing between the top of these barriers B1 to B5 and the front slab 2a, sufficient space to allow an exchange between neighboring cells, exchange which allows the cell conditioning effect already explained. This useful space for obtaining the conditioning effect corresponds to a height H3, given by the difference between the diameter D1 of the balls S1 to S4 and the height H2 of the confinement barriers B1 to B5. The value H3 of the free space between the barriers B1 to B5 and the front panel 2a, can vary according to technological conditions specific to the PAP, and it can be defined by experimentation. However, tests show that in a large number of cases, correct operation is obtained by giving the containment barriers B1 to B5, a height H2 of between approximately 65% and 85% of the diameter D1 of the balls S1 to S4.
Il est à remarquer qu'une telle configuration des barrières de confinement B1 à B5 pourrait également être adoptée pour un autre réseau de barrière de confinement (non représenté), autre réseau dont les barrières s'étendraient perpendiculairement aux barrières B1 à B5, de façon à former avec celles-ci des barrières entrecroisées. Dans l'exemple non limitatif représenté à la figure 2, une première et une seconde billes S1 , S2 sont placées respectivement entre la première et la seconde barrières B1 , B2, et entre la quatrième et la cinquième barrières B4, B5 ; ces deux billes S1 , S2 sont disposées le long d'un axe 20 perpendiculaire aux barrières de confinement B1 à B5, lequel axe est situé sensiblement à égales distances entre un bord 21 de la dalle 3a et les épargnes Ep1 à Ep5. Comme illustré par une troisième bille S3, d'autres billes d'entretoisement peuvent être disposées le long par exemple d'un second axe 22, parallèle au premier axe 20 et situé entre les épargnes Ep6 et Epn. Les billes d'entretoisement peuvent bien entendu être disposées de manière différente, le nombre et la répartition de ces billes sur la surface d'une dalle 2a, 3a étant déterminés par exemple en fonction de la tolérance admise sur la valeur de l'écartement D1 entre les deux dalles ; l'important est bien entendu que les billes soient placées entre les cellules et donc pas à l'emplacement précis d'une cellule pour ne pas nuire à la décharge.It should be noted that such a configuration of the containment barriers B1 to B5 could also be adopted for another network of containment barrier (not shown), another network whose barriers extend perpendicularly to the barriers B1 to B5, so to form intertwined barriers therewith. In the nonlimiting example shown in FIG. 2, a first and a second ball S1, S2 are placed respectively between the first and the second barriers B1, B2, and between the fourth and the fifth barriers B4, B5; these two balls S1, S2 are arranged along an axis 20 perpendicular to the confinement barriers B1 to B5, which axis is located substantially at equal distances between an edge 21 of the slab 3a and the savings Ep1 to Ep5. As illustrated by a third ball S3, other spacer balls can be arranged along for example a second axis 22, parallel to the first axis 20 and located between the savings Ep6 and Epn. The spacer balls can of course be arranged differently, the number and distribution of these balls on the surface of a slab 2a, 3a being determined for example as a function of the tolerance allowed on the value of the spacing D1 between the two tiles; the important thing is of course that the balls are placed between the cells and therefore not at the precise location of a cell so as not to harm the discharge.
Il est à noter que de préférence (mais non obligatoirement), les barrières de confinement B1 à B5 sont solidaires de la dalle qui porte les luminophores (soit la dalle arrière 3a dans l'exemple de la figure 2), de manière à ménager un espace H3 entre leur sommet et l'autre dalle. Cette structure avec barrières de confinement de hauteur inférieure à la distance d'écartement des dalles permet de diminuer de manière importante le temps de mise sous vide du panneau ce qui est appréciable lors d'une fabrication industrielle.It should be noted that preferably (but not necessarily), the confinement barriers B1 to B5 are integral with the slab which carries the phosphors (or the rear slab 3a in the example of FIG. 2), so as to provide a space H3 between their top and the other slab. This structure with confinement barriers of height less than the spacing distance of the slabs makes it possible to significantly reduce the evacuation time of the panel, which is appreciable during industrial manufacture.
Les barrières de confinement B1 à B5 peuvent être réalisées suivant une méthode classique, semblable à celle utilisée pour les barrières porteuses 11 montrées à la figure 1 : elles sont alors constituées en un matériau non conducteur électrique, résistant à l'écrasement, tel que verre, émail, céramique, etc. Mais, suivant une autre caractéristique de l'invention, les barrières de confinement B1 à B5 peuvent être réalisées en un matériau " meuble" , c'est-à-dire en un matériau pouvant s'écraser sous l'effet d'une pression exercée particulièrement par les billes S1 à S4 ; dans ce cas, les barrières de confinement B1 à B5 peuvent être constituées par exemple par un dépôt friable en poudre d'alumine ou bien de silice.The confinement barriers B1 to B5 can be produced according to a conventional method, similar to that used for the carrying barriers 11 shown in FIG. 1: they are then made of an electrically non-conductive material, resistant to crushing, such as glass. , enamel, ceramic, etc. But, according to another characteristic of the invention, the confinement barriers B1 to B5 can be made of a "soft" material, that is to say a material which can be crushed under the effect of pressure exercised particularly by the balls S1 to S4; in this case, the confinement barriers B1 to B5 can be constituted for example by a friable deposit of alumina powder or else of silica.
En cours de fabrication, on peut procéder de deux manières: - soit placer le réseau de billes S1 à S4 sur l'une des dalles 2a, 3a et placer les barrières de confinements B1 à B5 sur l'autre dalle ; l'avantage de barrières B1 à B5 de type 'meuble" est que lors de l'assemblage des dalles avant et arrière 2a, 3a, pour chaque bille qui éventuellement tombe en face d'une barrière, elle peut s'enfoncer dans la barrière sans la détruire, comme illustré sur la figure 2 avec une bille S4 enfoncée dans une barrière de confinement B3. Il est à noter que les billes peuvent être maintenues à leur position jusqu'à l'assemblage des dalles, par exemple par un collage résultant d'un chauffage de la dalle ; - soit placer le réseau e billes S1 à S4 sur la même dalle 3a que les barrières de confinements B1 à B5 : dans ce cas, les billes peuvent être plus aisément placées entre ces barrières.There are two ways to do this during manufacturing: - either place the network of balls S1 to S4 on one of the slabs 2a, 3a and place the confinement barriers B1 to B5 on the other slab; the advantage of barriers B1 to B5 of the "furniture" type is that during the assembly of the front and rear tiles 2a, 3a, for each ball which possibly falls in front of a barrier, it can sink into the barrier without destroying it, as illustrated in FIG. 2 with a ball S4 inserted in a confinement barrier B3 It should be noted that the balls can be held in their position until the tiles are assembled, for example by a resulting bonding a heating of the slab; - either place the network of balls S1 to S4 on the same slab 3a as the confinement barriers B1 to B5: in this case, the balls can be more easily placed between these barriers.
Dans l'un ou l'autre cas cependant, les barrières de type 'meuble" en s'écrasaπt pour laisser pénétrer une ou des billes, présentent l'avantage d'exiger une moindre précision de positionnement du réseau de billes, du réseau de barrières B1 à B5, et du positionnement relatif des deux dalles.In either case, however, the "furniture" type barriers are crushed to allow one or more balls to penetrate, have the advantage of requiring less precision in positioning the network of balls, the network of barriers B1 to B5, and the relative positioning of the two slabs.
La description de l'invention a été faite en référence à un panneau à plasma 'couleur',' mais il est clair que l'invention peut s'appliquer avantageusement à tous types de panneau à plasma pour lesquels il convient de limiter l'effet de confinement des cellules. The description of the invention has been made with reference to a 'color' plasma panel, but it is clear that the invention can advantageously be applied to all types of plasma panel for which the effect should be limited. cell containment.

Claims

REVENDICATIONS
1. Panneau à plasma comportant deux dalles (2a, 3a) parallèles assemblées l'une à l'autre, au moins deux réseaux d'électrodes (Y1 à Y3, X1 à X5) définissant des cellules (C1 à Cn), des moyens d'entretoisement (S1 à S4) déterminant une distance d'écartement (D1) entre les dalles, des moyens de confinement (B1 à B5) des cellules, caractérisé en ce que les moyens de confinement (B1 à B5) sont constitués par au moins un réseau de barrières dites " de confinement" dont la hauteur (H2) est perpendiculaire aux dalles (2a, 3a), ladite hauteur (H2) étant inférieure à la distance d'écartement (D1) des dalles. 1. Plasma panel comprising two parallel slabs (2a, 3a) assembled together, at least two arrays of electrodes (Y1 to Y3, X1 to X5) defining cells (C1 to Cn), means bracing (S1 to S4) determining a spacing distance (D1) between the slabs, means for confining (B1 to B5) the cells, characterized in that the confining means (B1 to B5) are constituted by at at least one network of so-called "confinement" barriers, the height (H2) of which is perpendicular to the slabs (2a, 3a), said height (H2) being less than the spacing distance (D1) of the slabs.
2. Panneau à plasma suivant la revendication 1, caractérisé en ce que les moyens d'entretoisement (S1 à S4) sont indépendants des moyens de confinement (B1 à B5).2. Plasma panel according to claim 1, characterized in that the bracing means (S1 to S4) are independent of the confinement means (B1 to B5).
3. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce que les moyens d'entretoisement (S1 à S4) sont des billes (S1 à S4).3. Plasma panel according to one of the preceding claims, characterized in that the bracing means (S1 to S4) are balls (S1 to S4).
4. Panneau à plasma suivant la revendication précédente, caractérisé en ce que les billes (S1 à S4) ont un diamètre (D1) plus grand que la hauteur (H2) des barrières de confinement (B1 à B5).4. Plasma panel according to the preceding claim, characterized in that the balls (S1 to S4) have a diameter (D1) greater than the height (H2) of the confinement barriers (B1 to B5).
5. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce que les barrières de confinement (B1 à B5) s'étendent parallèlement à un réseau d'électrodes (X1 à X5).5. Plasma panel according to one of the preceding claims, characterized in that the confinement barriers (B1 to B5) extend parallel to an array of electrodes (X1 to X5).
6. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce qu'il comporte au moins deux types d'éléments luminophores (7, 8, 9) correspondant à des couleurs différentes. 6. Plasma panel according to one of the preceding claims, characterized in that it comprises at least two types of phosphor elements (7, 8, 9) corresponding to different colors.
7. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce que deux éléments luminophores (7, 8, 9) de couleurs différentes sont séparés par une barrière de confinement (B1 à B5).7. Plasma panel according to one of the preceding claims, characterized in that two phosphor elements (7, 8, 9) of different colors are separated by a confinement barrier (B1 to B5).
8. Panneau à plasma suivant l'une des revendications 6 ou 7, caractérisé en ce que les éléments luminophores (7, 8, 9) forment des bandes qui s'étendent parallèlement aux électrodes (X1 à X5) de l'un des réseaux d'électrodes. 8. Plasma panel according to one of claims 6 or 7, characterized in that the phosphor elements (7, 8, 9) form strips which extend parallel to the electrodes (X1 to X5) of one of the networks of electrodes.
9. Panneau à plasma suivant l'une des revendications 6 à 8, caractérisé en ce que l'une des deux dalles est une dalle dite 'dalle avant" (2a) et l'autre dalle est une dalle dite 'dalle arrière"(3a) portant les éléments luminophores (7, 8, 9) ainsi que des électrodes colonnes (X1 à X5). 9. Plasma panel according to one of claims 6 to 8, characterized in that one of the two slabs is a slab called 'front slab' (2a) and the other slab is a slab called 'rear slab' ( 3a) carrying the phosphor elements (7, 8, 9) as well as column electrodes (X1 to X5).
10. Panneau à plasma suivant l'une des revendications 6 à 9, caractérisé en ce que les barrières de confinement (B1 à B5) sont solidaires de celle des deux dalle (2a, 3a) qui porte aussi les éléments luminophores (7, 8, 9).10. Plasma panel according to one of claims 6 to 9, characterized in that the confinement barriers (B1 to B5) are integral with that of the two slabs (2a, 3a) which also carries the phosphor elements (7, 8 , 9).
11. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce que les barrières de confinement (B1 à B5) ont une hauteur (H2) comprise entre 65% et 85% de la distance (D1) entre les dalles (2a, 3a).11. Plasma panel according to one of the preceding claims, characterized in that the confinement barriers (B1 to B5) have a height (H2) of between 65% and 85% of the distance (D1) between the slabs (2a , 3a).
12. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce que les barrières de confinement (B1 à B5) sont des barrières de type 'rneuble" réalisées en un matériau pouvant s'écraser sous l'effet d'une pression exercée par les moyens d'entretoisement (S1 à S4).12. Plasma panel according to one of the preceding claims, characterized in that the confinement barriers (B1 to B5) are "building" type barriers made of a material which can be crushed under the effect of pressure exercised by the bracing means (S1 to S4).
13. Panneau à plasma suivant l'une des revendications précédentes, caractérisé en ce qu'il est du type alternatif. 13. Plasma panel according to one of the preceding claims, characterized in that it is of the alternative type.
EP98929503A 1997-06-10 1998-06-05 Plasma panel with cell conditioning effect Expired - Lifetime EP0988643B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9707181A FR2764437B1 (en) 1997-06-10 1997-06-10 PLASMA PANEL WITH CELL CONDITIONING EFFECT
FR9707181 1997-06-10
PCT/FR1998/001153 WO1998057347A1 (en) 1997-06-10 1998-06-05 Plasma panel with cell conditioning effect

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EP0988643A1 true EP0988643A1 (en) 2000-03-29
EP0988643B1 EP0988643B1 (en) 2005-08-24

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EP (1) EP0988643B1 (en)
JP (1) JP2002503384A (en)
KR (1) KR100616324B1 (en)
DE (1) DE69831330D1 (en)
FR (1) FR2764437B1 (en)
TW (1) TW432351B (en)
WO (1) WO1998057347A1 (en)

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US11167343B2 (en) 2014-02-21 2021-11-09 Terves, Llc Galvanically-active in situ formed particles for controlled rate dissolving tools
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FR2764437B1 (en) 1999-08-27
EP0988643B1 (en) 2005-08-24
FR2764437A1 (en) 1998-12-11
WO1998057347A1 (en) 1998-12-17
TW432351B (en) 2001-05-01
JP2002503384A (en) 2002-01-29
US6400079B1 (en) 2002-06-04
KR100616324B1 (en) 2006-08-28
DE69831330D1 (en) 2005-09-29
KR20010013568A (en) 2001-02-26

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