EP0258130B1 - Elektrolumineszierender flacher Bildschirm - Google Patents

Elektrolumineszierender flacher Bildschirm Download PDF

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Publication number
EP0258130B1
EP0258130B1 EP87401863A EP87401863A EP0258130B1 EP 0258130 B1 EP0258130 B1 EP 0258130B1 EP 87401863 A EP87401863 A EP 87401863A EP 87401863 A EP87401863 A EP 87401863A EP 0258130 B1 EP0258130 B1 EP 0258130B1
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EP
European Patent Office
Prior art keywords
electrodes
counter
electrode
group
substrate
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
EP87401863A
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English (en)
French (fr)
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EP0258130A1 (de
Inventor
Dario Pecile
Roger Menn
Christian Brunel
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.)
Pecile Bruno Claude Dario
Pecile Christophe Joseph
Pecile Nee Benoist Claude Marie-Josephe
Original Assignee
Pecile Bruno Claude Dario
Pecile Christophe Joseph
Pecile Nee Benoist Claude Marie-Josephe
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Application filed by Pecile Bruno Claude Dario, Pecile Christophe Joseph, Pecile Nee Benoist Claude Marie-Josephe filed Critical Pecile Bruno Claude Dario
Publication of EP0258130A1 publication Critical patent/EP0258130A1/de
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Publication of EP0258130B1 publication Critical patent/EP0258130B1/de
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26—Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/02—Details
    • H05B33/06—Electrode terminals
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces

Definitions

  • the present invention relates to an electroluminescent flat screen.
  • a screen allows the display of a large amount of graphic and / or alpha-digital information and is used as a display terminal in portable computers, in telematic terminals, such as the minitel, or as a television screen.
  • an electroluminescent screen consists of a substrate on which are stacked layers of electrically conductive materials, layers of electrical insulator and a layer of electroluminescent material, these layers being protected by a backing covering the substrate.
  • Such an electroluminescent screen is described in particular in the article "Practical application technologies of thin-film electroluminescent panels” by Mikio Takeda et al. published in Proceedings of the SID, vol. 22-1, 1981, pp. 57 to 62.
  • Figure 1 a sectional view of an electroluminescent screen according to this article.
  • the different active layers of the screen are deposited on a transparent glass substrate 2.
  • a conductive layer is first deposited, for example in In2O3, which is then etched to form a network of transparent parallel electrodes 4.
  • a first dielectric layer 6, an electroluminescent layer 8 and a second dielectric layer 10 are deposited successively.
  • the dielectric layers are for example of Si3N4 and the electroluminescent layer of ZnS: Mn.
  • the second series of electrodes 14 is then etched in a conductive layer deposited on the second dielectric layer.
  • a bonding layer 12, for example made of Al2O3, can be placed between the layer 10 and the electrodes 14 to facilitate the bonding thereof.
  • the circuit is protected from mechanical attack and moisture by a glass plywood 18 fixed to the substrate 2 by a sealing bead 20, the free space between the deposited layers and the plywood 18 being previously filled with a filling material 16, such as a silicone oil.
  • a filling material 16 such as a silicone oil.
  • Each intersection between an electrode 4 and an electrode 14 defines an image element constituted by the superposition of the first dielectric layer, the electroluminescent material and the second dielectric layer.
  • the two networks of electrodes 4, 14 thus define a matrix of electroluminescent elements.
  • a picture element has a certain fragility. It is not uncommon in fact for an electrical breakdown to appear in an image element, which generally results in degradation of at least one of the two control electrodes associated with this image element.
  • a snap in a picture element therefore results in a display fault on a row or column portion of the display.
  • methods have been proposed to avoid degradation of the electrodes when an electrical breakdown occurs in an image element.
  • This method has the disadvantage of reducing the emissive surface because the anti-propagation incisions have a significant width, of the order of 10 to 20 microns, and they must be numerous to be generally effective.
  • a method for reducing the number of electrical breakdowns is also described in document GB-A-2096814. This method consists in applying a write compensation pulse before the refresh pulse and a regeneration compensation pulse after the regeneration pulse and before the next write pulse. These compensating pulses are of opposite signs to the writing and regeneration pulses and their intensity is chosen to be sufficiently low so as not to act on the picture elements.
  • the object of the invention is to make it possible to continue to control the display of the image elements situated beyond the deteriorated part of the electrode, that is to say to limit the defect of display with the only picture element destroyed by electrical breakdown.
  • the invention proposes to engrave counter-electrodes on the internal face of the protective counter-plate, and to connect each counter-electrode to the two ends of a control electrode of the electroluminescent screen.
  • control electrodes are supplied by their two ends.
  • the portion of the electrode situated beyond the cut continues to be supplied.
  • the subject of the invention is an electroluminescent flat screen according to claim 1. It applies to a screen comprising a transparent substrate, a first family of parallel line electrodes etched on said substrate, said electrodes being transparent, a layer of an electroluminescent material interposed between two layers of dielectric, a second family of parallel column electrodes etched on said dielectric layer, the two families of electrodes being crossed and defining in the electroluminescent layer a set of optical emitters arranged in a matrix , and a protective backing plate sealed on said substrate.
  • said flat screen is characterized in that the counterplate carries, on its inner face, at least one counter electrode and in that means are provided so that each counter electrode is electrically connected to the two ends of the same electrode of the first or second family of electrodes.
  • the protective counterplate carries, on its inner face, a family of parallel counter-electrodes partially covered with a layer of electrical insulator, each counter-electrode being connected to the two ends of an electrode of the first family of electrodes, and being isolated from the electrodes of the second electrode family by said layer of electrical insulator.
  • the plywood carries, on its inner face, a family of parallel counter-electrodes, each counter-electrode being electrically connected to an electrode of the second family of electrodes.
  • the plywood carries, on its inner face, a first family of counter-electrodes, a layer of electrical insulator and a second family of counter-electrodes, the first and second families of counter electrodes being crossed, each counter electrode of the first family of counter electrodes being electrically connected to the two ends of an electrode of the first family of electrodes and each counter electrode of the second family of counter electrodes being electrically connected to the two ends of an electrode of the second family of electrodes.
  • the electrical contact between an electrode and a counter-electrode is obtained, at each end of said electrode, by a conductive pad.
  • a conductive pad is obtained, at each end of said electrode, by a conductive pad. This can for example be carried out using a conductive ink deposited by screen printing.
  • the invention according to independent claim 8 can also be implemented in the case of a double screen comprising two substrates assembled with each other, each substrate carrying a first family of parallel electrodes, a set of layers constituting the electroluminescent elements, and a second family of parallel electrodes, the electrodes of the first and second families being crossed, the assembly being carried out so as to electrically connect the two ends of an electrode of the second family of electrodes of a substrate with the two ends of an electrode of the second family of electrodes of the other substrate.
  • the invention according to independent claim 9 can also be advantageously used in large electroluminescent screens in which the column electrodes are formed by two half-columns and the row electrodes are paired.
  • FIGS. 2 and 3 A first embodiment of an electroluminescent screen according to the invention will be described with reference to FIGS. 2 and 3.
  • the electroluminescent screen comprises a transparent substrate 2 on which the matrix of electroluminescent elements is produced, and a backing plate 18. These two elements are intended to be assembled later.
  • the matrix of electroluminescent elements is produced on the substrate 2 in a conventional manner, for example as described with reference to FIG. 1.
  • a first conductive layer is deposited and then etched so as to form a first family of parallel electrodes 4. These electrodes are transparent and are made, for example, of indium tin oxide.
  • Electrodes are covered with a first layer of dielectric 6, a layer of electroluminescent material 8 and a second layer of dielectric 10 (FIG. 3). All of these three layers are represented by a single layer 22 in FIG. 2.
  • the dielectric layers are for example made of Si3N4 and the electroluminescent layer made of ZnS: Mn.
  • This layer 22 is covered with a conductive layer in which is engraved a second family of electrodes 14. These electrodes are not necessarily transparent and are made for example of aluminum. Between the layer 22 and the electrodes 14, an Al2O3 bonding sublayer can be deposited to allow better contact between the electrodes 14 and the layer 22. In the embodiment of FIG. 2, the control circuits 24 and 26 of the first and second families of electrodes are also produced on the substrate 2.
  • a plywood 18 is added to provide mechanical protection and protection against moisture of the layer 22.
  • the fixing between the substrate 2 and the plywood 18 is done by a sealing bead 20.
  • this sealing bead is produced on the backing plate 18. However, it can also be produced on the substrate 2.
  • the plywood 18 carries at least one etched counter-electrode intended to be connected to the two ends of an electrode of the substrate 2.
  • the plywood 18 carries, by way of example, a family of parallel counter-electrodes 28. These are made, for example, of aluminum.
  • These counter-electrodes 28 can be etched in a layer deposited directly on the plywood 18. It is also possible to deposit beforehand on the plywood 18, an Al2O3 bonding sub-layer or a SiO2 layer constituting a chemical barrier.
  • the counter electrodes 28 are intended to be connected to the electrodes 14 etched on the substrate 2. This connection is made by a set of conductive pads 30 produced on the counter electrodes 28.
  • a conductive ink deposited by screen printing can be used. This technique has the advantage of being easy to implement and of being inexpensive.
  • the ink deposited is first dried at 90 ° C. for 90 minutes to obtain a first prepolymerized state which allows storage for several months at room temperature.
  • the sealing bead 20 can also be produced by means of an ink deposited by screen printing such as the EPO-TEK H78 ink. This ink is dried in the same way as the ink used for producing the conductive pads 30.
  • the assembly of the substrate 2 and the plywood 18 is done for example in a glove box under a flow of dry gas.
  • the precise positioning of the plywood 18 relative to the substrate 2 is obtained by bringing two marks 32 and 36 on the substrate 2 into coincidence with marks 34 and 38 respectively on the plywood 18.
  • the heating for the polymerization of the inks can be localized, if the other elements of the screen are not provided to withstand such a temperature.
  • Figures 2 and 3 show the conductive pads and the sealing bead on the plywood 18, it is obvious that these elements can also be deposited on the substrate 2 or can be distributed on the substrate 2 and on plywood 18.
  • the conductive pads 30 are crushed between a counter electrode 28 and an electrode 14 of the second family of electrodes of the substrate 2. This crushing of the pads can cause electrical contact. between two adjacent electrodes or two counter electrodes.
  • the conductive pads can be arranged as shown in FIG. 4, where the conductive pads of the consecutive counter-electrodes 28 are offset relative to each other.
  • each electrode 14 by its two ends. This allows in the event of a local break in an electrode 14, for example as a result of an electrical breakdown, to continue to supply the portion of the electrode situated beyond the break.
  • each electrode 14 by these two ends makes it possible to reduce the effects of time constant, particularly sensitive for large screens, which are caused by the resistance of the electrodes.
  • the supply of an electrode by its two ends has the result of reducing the current peaks, which makes it possible to increase the lifetime of the electroluminescent screen.
  • the plywood 18 carries a family of counter-electrodes 28 intended to be connected to the electrodes 14 of the substrate 2. These electrodes constituting the upper layer of the substrate 2, contact can take place directly between these and the counter-electrodes 28.
  • a variant of this embodiment consists in replacing the counter-electrodes 28 by another family of electrodes intended to be connected to the electrodes 4 of the substrate 2.
  • the counter-electrodes must be covered with a layer of electrical insulator to avoid contact with the electrodes 14 during assembly between the substrate 2 and the plywood 18.
  • the fact of supplying the two ends of the electrodes 4 has the same advantages as the fact of supplying the two ends of the electrodes 14, as described with reference to FIGS. 2 and 3, namely a reduction in the effects of constant of time and a reduction in current peaks.
  • the supply of the electrodes 4 by their two ends is particularly advantageous because these electrodes have a small thickness - they must be transparent and not create any step effect - and therefore have an electrical resistance high.
  • Another variant consists in making simultaneously on the plywood 18 two families of crossed counter-electrodes intended to be each connected to one of the two families of electrodes of the substrate 2. Such an embodiment is shown in FIG. 5.
  • the matrix of electroluminescent elements is produced on the substrate 2 using a first family of parallel electrodes 4, a layer 22 composed of a first layer of dielectric, a layer of electroluminescent material and d a second layer of dielectric, and a second family of parallel electrodes 14, the electrodes of the two families being crossed.
  • counter-electrodes are etched on the counterplate 18. More precisely, in the embodiment of FIG. 5 the counterplate 18 comprises a first family of parallel counter-electrodes 42 intended to be connected to the electrodes 4 of the substrate 2, an electrical insulating layer 44 produced for example Al2O3, Y2O3, Ta2O5 or others (in particular a screen-printing insulating paste).
  • a second family of parallel counter-electrodes 28 is then etched in a conductive layer deposited on the layer 44. These counter-electrodes 28 are intended to be electrically connected to the electrodes 14 of the substrate 2.
  • the layer 44 makes it possible to electrically isolate the two families of counter-electrodes etched on the counterplate 18 the deposition of each conductive layer in which the counter-electrodes are etched can be preceded by the deposition of a bonding sub-layer, for example in Al2O3, or of a layer constituting a chemical barrier, for example in SiO2, Si3N4 or other.
  • each counter electrode 28, 42 are made two conductive pads 30, 46 for connecting each of said counter electrodes to the two ends of the corresponding electrode of the substrate 2.
  • These conductive pads can be produced by means of a conductive ink deposited by screen printing. The same technique can be used to produce the sealing bead 20 from a non-electrically conductive ink.
  • control circuits 24 and 26 of the families of electrodes 4 and 14 can be produced independently on the substrate 2 or on the plywood 18.
  • the production on the plywood 18 may have an advantage for the functional test before assembly.
  • the electroluminescence and addressing functions of the electroluminescent elements are respectively produced on the substrate 2 and on the plywood 18, and can therefore be tested separately.
  • the invention can also be implemented for the production of an electroluminescent screen comprising two layers of electroluminescent material of different colors.
  • Such an electroluminescent screen is shown in FIG. 6.
  • the conventional plywood used to protect the matrix of electroluminescent elements produced on the substrate is replaced here by a second substrate itself carrying a matrix of electroluminescent elements.
  • the two substrates 2A, 2B have a conventional structure, and identical, as regards the matrix of electroluminescent elements. They each comprise a first family of electrodes 4A, 4B parallel, a layer 22A, 22B composed of two dielectric layers between which is disposed a layer of electroluminescent material, and a second family of electrodes 14A, 14B parallel, the first and second families being crossed.
  • the electroluminescent materials of the two substrates are different. Furthermore, the electrodes 14A, 14B are transparent as well as, for example, the electrodes 4A if the viewing is done through the substrate 2A.
  • Conductive pads 30A, 30B are arranged at the two ends of each of the electrodes 14A, 14B of the second families of electrodes of each substrate.
  • the electroluminescent screen is completed by a control circuit 24A of the first family of electrodes 4A of the substrate 2A, a control circuit 24B of the first family of electrodes 4B of the substrate 2B, and a control circuit 26 for controlling the second families of electrodes 14A, 14B of the substrates 2A, 2B.
  • the control circuit 24 can be produced on any one of the two substrates. In the embodiment of FIG. 6, it is produced on the substrate 2A and is connected directly to the electrodes 14A of the second family of electrodes of this substrate. It is also connected to the electrodes 14B of the second family of electrodes of the substrate 2B via the conductive pads 30A, 30B.
  • the electroluminescent screen finally comprises a passivation layer (not shown) to avoid electrical contact between the electrodes 4A and the electrodes 4B and possibly, the circuits 24A and 24B if these are opposite, and a sealing bead 22 to protect the electroluminescent matrices from ambient humidity.
  • the invention can also be used advantageously in large light-emitting screens in which the column electrodes are formed by two half-columns and the row electrodes are paired.
  • each column electrode is formed by an upper half-column 48 and a lower half-column 50.
  • the upper half-columns are addressed by a circuit 52 and the lower half-columns by a control circuit 54.
  • the line electrodes are divided equally into a subset of upper lines and a subset of lower lines, each line electrode of one subset being connected to a line electrode of the other subset.
  • the row electrode of rank i, 1iN, where N is the number of rows of a subset is connected to the row electrode N-i + 1 of the other subset.
  • the line electrodes are therefore controlled in pairs, by a control circuit 56.
  • connection between a line electrode of one sub-assembly and the corresponding line electrode of the other sub-assembly can be carried out in practice by means of etched counter electrodes, according to the invention, on the counterplate covering the matrix of electroluminescent elements.
  • Such counter electrodes are shown in Figure 7b. These counter electrodes 58 are in the form of U nested one inside the other so as to connect each of the two ends of a line electrode of a subset to one of the ends of the line electrode associated with the other subset.
  • each line electrode is electrically supplied by its two ends.
  • An advantage provided by the proposed arrangement over the arrangement described in the article by R.T. Flegal is the saving in surface area of the substrate carrying the electroluminescent structure, since the connections between the lines of different sub-assemblies are made on the plywood.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Claims (9)

  1. Flacher, elektrolumineszierender Bildschirm, enthaltend ein transparentes Substrat (2), auf dem nacheinander eine erste Familie paralleler, transparenter Elektroden (4), eine Schicht aus einem elektrolumineszierenden Material (8), die zwischen zwei dielektrischen Schichten (6, 10) angeordnet ist, und eine zweite Familie paralleler Elektroden (14) aufgebracht sind, wobei die zweite Elektrodenfamilien einander kreuzen und in der elektrolumineszierenden Schicht eine Gruppe optischer Sender bilden, die in Matrixform angeordnet sind, wobei der flache Bildschirm weiterhin eine Steuerschaltung (24) für die Elektroden (4) und eine Steuerschaltung (26) für die Elektroden (14) und eine Schutzdeckplatte aufweist, die auf dem Substrat mittels eines Dichtungsbandes (20) abgedichtet befestigt ist, dadurch gekennzeichnet, daß die Deckplatte auf ihrer Innenseite wenigstens eine Gegenelektrode (28, 42) trägt und daß Einrichtungen (30) vorgesehen sind, damit jede Gegenelektrode elektrisch mit den zwei Enden ein und derselben Elektrode der ersten oder der zweiten Elektrodenfamilie verbunden ist.
  2. Flacher, elektrolumineszierender Bildschirm nach Anspruch 1, dadurch gekennzeichnert, daß die Deckplatte (18) auf ihrer Innenseite eine Familie paralleler Gegenelektroden (42) trägt, die teilweise von einer elektrisch isolierenden Schicht (44) bedeckt sind, wobei jede Gegenelektrode mit den zwei Enden einer Elektrode (4) der ersten Elektrodenfamilie verbunden ist und von den Elektroden (14) der zweiten Elektrodenfamilie durch die genannte elektrisch isolierende Schicht isoliert ist.
  3. Flacher, elektrolumineszierender Bildschirm nach Anspruch 1, dadurch gekennzeichnet, daß die Deckplatte (18) auf ihrer Innenseite eine Familie von parallelen Gegenelektroden (28) trägt, von denen jede elektrisch mit einer Elektrode (14) der zweiten Elektrodenfamilie verbunden ist.
  4. Flacher, elektrolumineszierender Bildschirm nach Anspruch 1, dadurch gekennzeichnet, daß die Deckplatte (18) auf ihrer Innenseite eine erste Familie von Gegenelektroden (42), eine elektrisch isolierende Schicht (44) und eine zweite Familie von Gegenelektroden (28) trägt, wobei die ersten und zweiten Gegenelektrodenfamilien einander kreuzen, jede Gegenelektrode (42) der ersten Gegenelektrodenfamilie elektrisch mit den zwei Enden einer Elektrode (4) der ersten Gegenelektrodenfamilie und jede Gegenelektrode (28) der zweiten Gegenelektrodenfamilie elektrisch mit den zwei Enden einer Elektrode (14) der zweiten Elektrodenfamilie verbunden ist.
  5. Flacher, elektrolumineszierender Bildschirm nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der elektrische Kontakt zwischen einer Elektrode und einer Gegenelektrode an jedem Ende der genannten Elektrode durch einen Leiterfleck (30) erhalten ist.
  6. Flacher, elektrolumineszierender Bildschirm nach Anspruch 5, dadurch gekennzeichnet, daß jeder Leiterfleck (30) aus einer durch Siebdruck aufgebrachten Leiterfarbe gebildet ist.
  7. Flacher, elektrolumineszierender Bildschirm nach einem der Ansprüche 5 und 6, dadurch gekennzeichnet, daß die Leiterflecken von zwei benachbarten Elektroden gegeneinander versetzt sind.
  8. Flacher, elektrolumineszierender Bildschirm, dadurch gekennzeichnet, daß er zwei Substrate (2A, 2B) enthält, die miteinander verbunden sind, wobei jedes Substrat aufeinanderfolgend enthält: eine erste Familie paralleler Elektroden (4A, 4B) und eine Schichtengruppe (22A, 22B), die die elektrolumineszierenden Elemente bilden, und eine zweite Familie paralleler Elektroden (14A, 14B), wobei die Elektroden der ersten und zweiten Familien einander kreuzen, wobei die Verbindung der Substrate derart realisiert ist, daß die zwei Enden einer Elektrode (14A) der zweiten Elektrodenfamilie eines Substrats mit den zwei Enden einer Elektrode (14B) der zweiten Elektrodenfamilie des anderen Substrats (2B) elektrisch verbunden sind, wobei der Bildschirm weiterhin eine Steuerschaltung (24A) aufweist, um die Elektroden der ersten Elektrodenfamilie eines Substrats (2A) anzusteuern, eine Steuerschaltung (24B), um die Elektroden der ersten Elektrodenfamilie des anderen Substrats (2B) anzusteuern, und eine Steuerschaltung (26), um die Elektroden der zweiten Elektrodenfamilien der beiden Substrate anzusteuern.
  9. Flacher, elektrolumineszierender Bildschirm, enthaltend ein transparentes Substrat, auf dem aufeinanderfolgend aufgebracht sind: eine Familie aus parallelen Zeilenelektroden, die aus zwei Untergruppen von Zeilenelektroden zusammengesetzt ist, wobei die Elektroden transparent sind und jede Zeilenelektrode einer Untergruppe mit einer Zeilenelektrode der anderen Untergruppe gepaart ist, eine Schicht aus einem elektrolumineszierenden Material, das zwischen zwei dielektrischen Schichten angeordnet ist, und eine Familie von parallelen Spaltenelektroden, wobei jede Spalte aus zwei Halbspalten (48, 50) gebildet ist und jede Halbspalte eine Untergruppe der Zeilen kreuzt, wobei der flache Bildschirm weiterhin eine Zeilensteuerschaltung (46) und zwei Halbspalten-Steuerschaltungen (52, 54) enthält und der Bildschirm außerdem eine Schutzdeckplatte aufweist, die auf dem Substrat durch ein Dichtungsband (20) abgedichtet befestigt ist, dadurch gekennzeichnet, daß die Deckplatte auf ihrer Innenseite eine Gegenelektrodenanordnung trägt und daß Einrichtungen vorgesehen sind, um über eine Gegenelektrode jedes Ende einer Zeilenelektrode mit einem Ende der mit ihr gepaarten Zeilenelektrode elektrisch zu verbunden.
EP87401863A 1986-08-11 1987-08-10 Elektrolumineszierender flacher Bildschirm Expired - Lifetime EP0258130B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611585 1986-08-11
FR8611585A FR2602606B1 (fr) 1986-08-11 1986-08-11 Ecran plat electroluminescent

Publications (2)

Publication Number Publication Date
EP0258130A1 EP0258130A1 (de) 1988-03-02
EP0258130B1 true EP0258130B1 (de) 1991-04-17

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EP87401863A Expired - Lifetime EP0258130B1 (de) 1986-08-11 1987-08-10 Elektrolumineszierender flacher Bildschirm

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US (1) US4829213A (de)
EP (1) EP0258130B1 (de)
JP (1) JPS6348793A (de)
DE (1) DE3769401D1 (de)
FR (1) FR2602606B1 (de)

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FR2602606B1 (fr) 1988-11-10
DE3769401D1 (de) 1991-05-23
US4829213A (en) 1989-05-09
EP0258130A1 (de) 1988-03-02
JPS6348793A (ja) 1988-03-01
FR2602606A1 (fr) 1988-02-12

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