EP0048839A1 - Flat image screen, process for manufacturing and using the same - Google Patents

Flat image screen, process for manufacturing and using the same Download PDF

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Publication number
EP0048839A1
EP0048839A1 EP81106915A EP81106915A EP0048839A1 EP 0048839 A1 EP0048839 A1 EP 0048839A1 EP 81106915 A EP81106915 A EP 81106915A EP 81106915 A EP81106915 A EP 81106915A EP 0048839 A1 EP0048839 A1 EP 0048839A1
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EP
European Patent Office
Prior art keywords
plate
pins
hollow cylinder
screen according
plates
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Granted
Application number
EP81106915A
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German (de)
French (fr)
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EP0048839B1 (en
Inventor
Hinrich Dr. Rer. Nat. Dipl. Phys. Heynisch
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Siemens AG
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Siemens AG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/261—Sealing together parts of vessels the vessel being for a flat panel display
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/127—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using large area or array sources, i.e. essentially a source for each pixel group
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/30—Cold cathodes
    • H01J2201/308—Semiconductor cathodes, e.g. having PN junction layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels
    • H01J2329/86—Vessels
    • H01J2329/8625—Spacing members

Definitions

  • the invention relates to a flat screen according to the preamble of claim 1 and also includes manufacturing techniques and applications for this tube.
  • a display of the type mentioned is described for example in DE-OS 26 55 498.
  • the spacing of the two carrier plates still presents considerable difficulties. Because you have to make sure that the two substrates on the entire display surface adhere exactly to a given distance and look for a construction with which the plates can withstand the high external pressure without any deformation; the support and spacing elements must be designed in such a way that they do not impair the optical qualities of the panel.
  • the invention has for its object to provide a flat screen with a plate spacing that does not give up any special manufacturing or assembly problems, ensures a well-defined substrate spacing, is pressure and high voltage resistant, also allows the finest pixel grid and also is also suitable for extremely flat electron beam panels.
  • This object is achieved according to the invention by a screen with the features of claim 1.
  • the proposed display is characterized above all by the fact that all the spacers lie correctly with the pixels even without special precautions, are short-circuit proof due to a large creepage distance and, last but not least, can be implemented very easily. It is sufficient to etch the plates using suitable masks or - this is a particularly elegant method - to structure them using a pressing process. In addition, the image quality is usually not noticeably degraded; it remains even under unfavorable heat conditions and / or after longer operating times, since the spacing elements provided according to the invention are thermally ideally adapted to the carrier plates.
  • spacer elements with a folded surface profile to improve the high-voltage strength; see DE-OS 26 15 721.
  • the spacer parts do not belong to the carrier plates;
  • the pins are passed through openings in one carrier plate and end in cups attached on the outside.
  • a picture tube according to the invention is particularly suitable for the display of television pictures and preferably works with electrons in the rear part of the tube generated with the aid of a control matrix and forwarded to an anode coated with phosphorus.
  • Cold cathodes or photocathodes, in particular, with an IR control matrix attached to the outside appear to be useful as an electron source, because in these cases the overall construction can be kept very simple, robust, flat and light. Calculations show that with a screen area of 400 mm x 600 mm, a construction depth of less than 10 mm and a weight of less than 3 kg is possible.
  • the display shown is provided as a screen of a color television set. Its vacuum envelope consists of two parallel carrier plates (Front plate 1, back plate 2), which are connected to one another via a frame 3.
  • the front plate On its rear side, the front plate carries a family of parallel anode strips 4, each of which is covered with a phosphor strip 6. Every third phosphor strip lights up in the same color when bombarded with electrons. (As is well known, colored images can be generated by three basic colors, usually red, green and blue.)
  • the anode strips, which have phosphors of the same color, are each led to a common connection 7, which passes through the vacuum envelope between the frame and the front plate.
  • the backplate contains a control matrix of row conductors 8 and column conductors 9, the column conductors being provided with an opening 11 at the intersection points of the matrix.
  • the cathode elements are cold cathodes with a heterojunction and negative electron affinity based on GaP-GaAlP.
  • the two carrier plates are spaced apart from one another by spacers, the structure of which can best be seen in FIGS. 2 and 3.
  • the front plate 1 contains a regular pattern of pin-like projections (pins 13), and the back plate has a corresponding pattern of hollow cylindrical projections (hollow cylinder 14).
  • pins 13 pins 13
  • hollow cylinder 14 hollow cylindrical projections
  • Each pin protrudes into one of the hollow cylinders without touching its side wall and strikes the cylinder bottom. In this way, a relatively long path is created between the control matrix and the anode strips along the spacer surface. You can bring the two plates closer together to about 1 mm if the display is to be operated with a high voltage of several kV. 3 shows how the individual spacing elements are distributed in the control matrix.
  • a spacer is assigned to each pixel that is formed from the color triplet red / green / blue.
  • the cathode elements have a diameter of 0.2 mm
  • the phosphor strips have a width of 0.4 mm
  • the hollow cylinders have an outer diameter of 0.4 mm and an inner diameter of 0.25 mm
  • the supports have a cross section of almost 0 , 2 mm.
  • the two carrier plates consist of a few mm thick glass substrates, the frame from an approximately 1 mm thick glass part and the electrodes from the usual metals such as titanium, gold or platinum.
  • the substrates have their protrusions through a hot pressing process in which a suitably shaped die is pressed onto the initially flat surface of the plate at elevated temperatures. Head and Phos p horsch layers are produced in conventional thin film techniques.
  • the invention is not limited to the exemplary embodiment shown. There is still considerable scope for design, especially when designing the spacers. For example, you could also choose rectangular cross sections instead of round ones and provide the pin-receiving parts with a base that is not on the

Abstract

Es wird vorgeschlagen, die beiden Elektrodenplatten (1, 2) einer Flachbildröhre mit einer Bildpunktmatrix folgendermaßen voneinander zu distanzieren: Von der einen Platte (1) gehen Stifte (13) und von der anderen Platte (2) gehen Hohlzylinder (14) aus; jeder Stift (13) ragt in einen der Hohlzylinder (14) hinein, ohne dessen Seitenwandung zur berühren; die Abstandshalter, die jeweils einem der Bildpunkte zugeordnet sind, sind vorzugsweise durch Tiefätzen oder Warmpressen aus den Trägerplatten (1, 2) herausgearbeitet. Die vorgeschlagene Distanzierungstechnik kommt vor allem dann in Frage, wenn der Plattenabstand nur wenige mm beträgt und im Betrieb der Röhre zwischen den beiden Elektrodenplatten eine Potentialdifferenz von mehreren kV herrschen kann. Sie eignet sich dementsprechend für Displaytypen, bei denen die Vorderplatte mit einer Anode sowie einer Leuchtstoffschicht versehen ist und die Rückplatte eine Elektronenquelle in Form einer Kaltkathode oder einer Fotokathode mit externer IR-Steuermatrix trägt. Hauptanwendungsgebiet: Darstellung von Fernsehbildern.It is proposed to distance the two electrode plates (1, 2) of a flat tube with a pixel matrix from one another as follows: pins (13) extend from one plate (1) and hollow cylinders (14) extend from the other plate (2); each pin (13) protrudes into one of the hollow cylinders (14) without touching the side wall thereof; the spacers, which are each assigned to one of the pixels, are preferably worked out of the carrier plates (1, 2) by deep etching or hot pressing. The proposed spacing technique comes into question especially when the plate spacing is only a few mm and when the tube is in operation there can be a potential difference of several kV between the two electrode plates. Accordingly, it is suitable for display types in which the front plate is provided with an anode and a phosphor layer and the back plate carries an electron source in the form of a cold cathode or a photo cathode with an external IR control matrix. Main area of application: Representation of television pictures.

Description

Die Erfindung betrifft einen flachen Bildschirm gemäß dem Oberbegriff des Anspruchs 1 und umfaßt außerdem Fertigungstechniken und Anwendungsmöglichkeiten für diese- Röhre. Ein Display der genannten Art wird beispielsweise in der DE-OS 26 55 498 beschrieben.The invention relates to a flat screen according to the preamble of claim 1 and also includes manufacturing techniques and applications for this tube. A display of the type mentioned is described for example in DE-OS 26 55 498.

In der Praxis bereitet die Distanzierung der beiden Trägerplatten noch immer erhebliche Schwierigkeiten. Denn man muß sicherstellen, daß die beiden Substrate auf der gesamten Anzeigefläche einen vorgegebenen Abstand genau einhalten und dafür eine Konstruktion suchen, mit deren'Hilfe die Platten dem hohen Außendruck ohne jede Verformung standhalten können; dabei haben die Stütz- und Distanzierelemente so beschaffen zu sein, daß sie die optischen Qualitäten des Panels nicht beeinträchtigen.In practice, the spacing of the two carrier plates still presents considerable difficulties. Because you have to make sure that the two substrates on the entire display surface adhere exactly to a given distance and look for a construction with which the plates can withstand the high external pressure without any deformation; the support and spacing elements must be designed in such a way that they do not impair the optical qualities of the panel.

In den letzten Jahren sind eine Reihe von Versuchen unternommen worden, die genannten Probleme zu lösen. So hatte man etwa daran gedacht, in dem Raum zwischen den beiden Platten eine Vielzahl von relativ kleinvolumigen Distanzkörpern zu verteilen. Es stellte sich jedoch heraus, daß dieser Weg nur dann erfolgreich ist, wenn man auf die Positionierung der einzelnen Partikel große Sorgfalt verwendet und die Teilchen an Ort und Stelle unter erheblichem Aufwand fixiert (vergl. hierzu neben der eingangs zitierten Offenlegungsschrift, nach der Metallkörper auf Leiterbahnen aufgelegt und mit einerThermo-Druck-Metallisierung oder dergleichen befestigt werden sellen, auch "IBM Technical Disclosure Bulletin" 19 (1977) 3066 oder 20 (1978) 3496, wonach Glasteilchen in Substratvertiefungen eingebracht bzw. durch eine Verteilerschablone an den vorgesehenen Platz gebracht und durch aufschmelzen eines Substratüberzuges angeheftet werden).A number of attempts have been made in recent years to solve the problems mentioned. For example, one had thought of distributing a large number of relatively small-volume spacers in the space between the two plates. However, it turned out that this way is only successful if great care is taken in the positioning of the individual particles and the particles are fixed in place with considerable effort (cf. here In addition to the above-mentioned laid-open publication, according to which metal bodies are placed on conductor tracks and fastened with a thermal pressure metallization or the like, also "IBM Technical Disclosure Bulletin" 19 (1977) 3066 or 20 (1978) 3496, according to which glass particles are introduced or recessed in substrate depressions brought into place by a distributor template and attached by melting a substrate coating).

Die Plazierungs- und Verankerungsarbeit wird zweifellos geringer, wenn man zu großflächigen Distanziereinheiten, beispielsweise Strukturen mit wabenförmgen oder girlandenartigen Mustern (DE-OS 27 50.587) oder regelmäßig gelochten Platten (DE-OS 28 55 108), übergeht. Allerdings werden diese Erleichterungen mit einer relativ mühevollen Fertigung erkauft. Denn die Distanzierstrukturen müssen mit Durchbrüchen versehen werden, die unter Umständen ein hochfeines Raster bilden und überdies mit jedem Bildpunkt genau fluchten sollen. Die Anforderungen sind dabei besonders hoch, wenn das Display mit Elektronenstrahlen arbeitet und dementsprechend Kurzschlüsse und/oder Darstellungsfehler aufgrund von Wandaufladungen zu befürchten sind.The placement and anchoring work is undoubtedly less if one goes over to large-area spacing units, for example structures with honeycomb-shaped or garland-like patterns (DE-OS 27 50.587) or regularly perforated plates (DE-OS 28 55 108). However, these facilities are bought with a relatively difficult production. Because the spacer structures must be provided with openings, which may form a very fine grid and, moreover, should be precisely aligned with each pixel. The requirements are particularly high if the display works with electron beams and accordingly short circuits and / or display errors due to wall charging are to be feared.

Der Erfindung liegt die Aufgabe zugrunde, einen Flachbildschirm mit einer Plattendistanzierung anzugeben, die keine besonderen Herstellungs- oder Montageprobleme aufgibt, einen wohldefinierten Substratabstand gewährleistet, druck- und hochspannungsfest ist, auch feinste-Bildpunktraster zuläßt und zudem auch für extrem flache Elektronenstrahlpanels geeignet ist. Diese Aufgabe wird erfindungsgemäß durch einen Bildschirm mit den Merkmalen des Patentanspruchs 1 gEMst.The invention has for its object to provide a flat screen with a plate spacing that does not give up any special manufacturing or assembly problems, ensures a well-defined substrate spacing, is pressure and high voltage resistant, also allows the finest pixel grid and also is also suitable for extremely flat electron beam panels. This object is achieved according to the invention by a screen with the features of claim 1.

Das vorgeschlagene Display zeichnet sich vor allem dadurch aus, daß sämtliche Abstandshalter auch ohne besondere Vorkehrungen richtig zu den Bildpunkten liegen, aufgrund eines großen Kriechweges kurzschlußsicher sind und nicht zuletzt höchst einfach realisiert werden können. So genügt es, die Platten unter Verwendung geeigneter Masken tiefzuätzen oder - dies ist eine besonders elegante Methode - durch einen Preßvorgang zu strukturieren. Darüber hinaus wird die Bildgüte normalerweise nicht merklich verschlechtert; sie bleibt sogar auch noch unter ungünstigen Wärmebedingungen und/oder nach längeren Betriebszeiten erhalten, da die erfindungsgemäß vorgesehenen Distanzierelemente thermisch ideal an die Trägerplatten angepaßt sind.The proposed display is characterized above all by the fact that all the spacers lie correctly with the pixels even without special precautions, are short-circuit proof due to a large creepage distance and, last but not least, can be implemented very easily. It is sufficient to etch the plates using suitable masks or - this is a particularly elegant method - to structure them using a pressing process. In addition, the image quality is usually not noticeably degraded; it remains even under unfavorable heat conditions and / or after longer operating times, since the spacing elements provided according to the invention are thermally ideally adapted to the carrier plates.

Es ist an sich nicht mehr neu, zur Verbesserung der Hochspannungsfestigkeit Distanzelemente mit einem gefalteten Oberflächenverlauf zu verwenden; vergl. hierzu die DE-OS 26 15 721. Dort gehören allerdings die Abstandshalterteile nicht zu den Trägerplatten; überdies sind die Stifte durch Öffnungen in der einen Trägerplatte hindurchgeführt und enden in außen angesetzten Bechern.In itself, it is no longer new to use spacer elements with a folded surface profile to improve the high-voltage strength; see DE-OS 26 15 721. There, however, the spacer parts do not belong to the carrier plates; In addition, the pins are passed through openings in one carrier plate and end in cups attached on the outside.

Eine erfindungsgemäße Bildröhre eignet sich vor allem zur Darstellung von Fernsehbildern und arbeitet vorzugsweise mit Elektronen, die im hinteren Röhrenteil mit Hilfe einer Steuermatrix erzeugt und nach vorn auf eine mit Phosphor beschichtete Anode geleitet werden. Als Elektronenquelle erscheinen dabei insb. Kaltkathoden oder Fotckathoden.mit außen angebrachter IR-Steuermatrix sinnvoll, denn in diesen Fällen kann die Gesamtkonstruktion sehr einfach, robust, flach und leicht gehalten werden. Berechnungen zeigen, daß bei einer Schirmfläche von 400 mm x 600 mm ohne weiteres eine Bautiefe unter 10 mm und ein Gewicht von weniger als 3 kg möglich ist.A picture tube according to the invention is particularly suitable for the display of television pictures and preferably works with electrons in the rear part of the tube generated with the aid of a control matrix and forwarded to an anode coated with phosphorus. Cold cathodes or photocathodes, in particular, with an IR control matrix attached to the outside appear to be useful as an electron source, because in these cases the overall construction can be kept very simple, robust, flat and light. Calculations show that with a screen area of 400 mm x 600 mm, a construction depth of less than 10 mm and a weight of less than 3 kg is possible.

Weitere vortei-lhafte Ausgestaltungen und Weiterbildungen des Lösungsvorschlags sind Gegenstand zusätzlicher Ansprüche.Further advantageous refinements and developments of the proposed solution are the subject of additional claims.

Die Erfindung soll nun anhand eines besonders bevorzugten Ausführungsbeispiels unter Bezugnahme auf die beigefügte Zeichnung näher erläutert werden. In den Figuren sind einander entsprechende Teile mit gleichen Bezugszeichen versehen.The invention will now be explained in more detail using a particularly preferred embodiment with reference to the accompanying drawings. Corresponding parts in the figures are provided with the same reference symbols.

Es zeigen:

  • Fig. 1 das Ausführungsbeispiel in einem schematisch gehaltenen Seitenschnitt;
  • Fig. 2 eine Einzelheit aus Fig. 1, vergrößert dargestellt, und
  • Fig. 3 das Ausführungsbeispiel der Fig. 1 im Schnitt III-III, teilweise weggebrochen und ohne Kathodenschicht.
Show it:
  • Figure 1 shows the embodiment in a schematic side section.
  • Fig. 2 shows a detail of Fig. 1, enlarged, and
  • Fig. 3 shows the embodiment of Fig. 1 in section III-III, partially broken away and without a cathode layer.

Das dargestellte Display ist als Bildschirm-eines Farbfernsehgerätes vorgesehen. Seine Vakuumhülle besteht aus zwei zueinander parallelen Trägerplatten (Vorderplatte 1, Rückplatte 2), die über einen Rahmen 3 miteinander verbunden sind.The display shown is provided as a screen of a color television set. Its vacuum envelope consists of two parallel carrier plates (Front plate 1, back plate 2), which are connected to one another via a frame 3.

Die Vorderplatte trägt auf ihrer Rückseite eine Schar aus zueinander parallelen Anodenstreifen 4, die jeweils mit einem Phosphorstreifen 6 überzogen sind. Jeder dritte Phosphorstreifen leuchtet bei Elektronenbeschuß in der gleichen Farbe auf. (Farbige Bilder lassen sich bekanntlich durch drei.Grundfarben, in der Regel rot, grün und blau, erzeugen.) Die AnodenstEifen, die Phosphore gleicher Farbe tragen, sind jeweils auf einen gemeinsamen Anschluß 7 geführt, der die Vakuumhülle zwischen Rahmen und Vorderplatte durchtritt.On its rear side, the front plate carries a family of parallel anode strips 4, each of which is covered with a phosphor strip 6. Every third phosphor strip lights up in the same color when bombarded with electrons. (As is well known, colored images can be generated by three basic colors, usually red, green and blue.) The anode strips, which have phosphors of the same color, are each led to a common connection 7, which passes through the vacuum envelope between the frame and the front plate.

Die Rückplatte enthält eine Steuermatrix aus Zeilenleitern 8 und Spaltenleitern 9, wobei die Spaltenleiter-in den Kreuzungspunkten der Matrix jeweils mit einer Öffnung 11 versehen sind. Zwischen den beiden Leiterebenen befindet sich eine Kathodenschicht 12, die in jedem der Kreuzungspunkte ein aktives Kathodenelement hat. Die Kathodenelemente sind im vorliegenden Fall Kaltkathoden mit Hetero- übergang und negativer Elektronenaffinität auf der Basis GaP-GaAlP. Eine mehr ins einzelne gehende Darstellung dieser Steuermatrix ist in der am 24.09.80 eingereichten Patentanmeldung mit dem Titel "Flache Bildröhre" zu finden.The backplate contains a control matrix of row conductors 8 and column conductors 9, the column conductors being provided with an opening 11 at the intersection points of the matrix. There is a cathode layer 12 between the two conductor levels, which has an active cathode element in each of the crossing points. In the present case, the cathode elements are cold cathodes with a heterojunction and negative electron affinity based on GaP-GaAlP. A more detailed representation of this control matrix can be found in the patent application filed on September 24, 1980 with the title "Flat picture tube".

Die beiden Trägerplatten werden durch Abstandshalter voneinander distanziert, deren Aufbau an besten in den Fig. 2 und 3 zu erkennen ist. Die Vorderplatte 1 enthält ein regelmäßiges Muster aus stiftartigen Vorsprüngen (Stifte 13), und die Rückplatte hat ein entsprechendes Muster aus hohlzylinderförmigen Vorsprüngen (Hohlzylinder 14). Jeder Stift ragt in einen der Hohlzylinder hinein, ohne dessen Seitenwand zu berühren, und schlägt am Zylinderboden an. Auf diese Weise entsteht zwischen der Steuermatrix und den Anodenstreifen längs der Abstandshalteroberfläche ein relativ langer Pfad. Man kann die beiden Platten bis auf etwa 1 mm einander nähern, wenn das Display mit einer Hochspannung von mehreren kV betrieben werden soll. Fig. 3 zeigt, wie die einzelnen Distanzierelemente in der Steuermatrix verteilt sind. Jedem Bildpunkt, der aus dem Farbentrip-el rot/grün/blau gebildet wird, ist ein Abstandshalter zugeordnet. In einem typischen Beispiel haben die Kathodenelemente einen Durchmesser von 0,2 mm, die Phosphorstreifen eine Breite von 0,4 mm, die Hohlzylinder einen Außendurchmesser von 0,4 mm und einen Innendurchmesser von 0,25 mm und die Stützen einen Querschnitt von knapp 0,2 mm.The two carrier plates are spaced apart from one another by spacers, the structure of which can best be seen in FIGS. 2 and 3. The front plate 1 contains a regular pattern of pin-like projections (pins 13), and the back plate has a corresponding pattern of hollow cylindrical projections (hollow cylinder 14). Each pin protrudes into one of the hollow cylinders without touching its side wall and strikes the cylinder bottom. In this way, a relatively long path is created between the control matrix and the anode strips along the spacer surface. You can bring the two plates closer together to about 1 mm if the display is to be operated with a high voltage of several kV. 3 shows how the individual spacing elements are distributed in the control matrix. A spacer is assigned to each pixel that is formed from the color triplet red / green / blue. In a typical example, the cathode elements have a diameter of 0.2 mm, the phosphor strips have a width of 0.4 mm, the hollow cylinders have an outer diameter of 0.4 mm and an inner diameter of 0.25 mm and the supports have a cross section of almost 0 , 2 mm.

In einzelnen Fällen kann es zu spürbaren Wandaufladungen an den Distanzelementen kommen - etwa dann, wenn man den Stiften und/oder Hohlzylindern relativ große Querabmessungen gibt. Hier empfiehlt es sich, die den Elektronenstrahlenzugewandten Stift- bzw. Hohlzylinderoberflächen mit einem schwach leitenden Überzug, etwa einer Litium- verbindung in wässriger Lösung, zu beschichten.In individual cases, there may be noticeable wall charges on the spacer elements - for example, if the pins and / or hollow cylinders are given relatively large transverse dimensions. Here it is advisable to coat the pin or hollow cylinder surfaces facing the electron beams with a weakly conductive coating, such as a lithium compound in aqueous solution.

Das Display arbeitet folgendermaßen:

  • Die einzelnen Zeilenleiter werden zeitlich nacheinander äbgetastet, und während eine Zeile eingeschaltet ist, erhalten die Spalten nacheinander die drei Farbauszüge der Zeileninformation und zugleich die jeweils zugehörigen Anodenstreifen ein Hochspannungssignal.
The display works as follows:
  • The individual row conductors are scanned one after the other in time, and while a row is switched on, the columns successively receive the three color separations of the row information and at the same time the associated anode strips a high-voltage signal.

Im vorliegenden Fall bestehen die beiden Trägerplatten aus wenigen mm starken Glassubstraten, der Rahmen aus einem ca. 1 mm dicken Glasteil und die Elektroden aus den dafür üblichen Metallen wie Titan, Gold oder Platin. Die Substrate haben ihre Vorsprünge durch einen Warmpreßprozeß erhalten, bei dem man eine geeignet geformte Matrize unter erhöhten Temperaturen auf die zunächst noch ebene Plattenoberfläche drückt. Leiter und Phosphorschichten sind in üblichen Dünnschichttechniken hergestellt.In the present case, the two carrier plates consist of a few mm thick glass substrates, the frame from an approximately 1 mm thick glass part and the electrodes from the usual metals such as titanium, gold or platinum. The substrates have their protrusions through a hot pressing process in which a suitably shaped die is pressed onto the initially flat surface of the plate at elevated temperatures. Head and Phos p horsch layers are produced in conventional thin film techniques.

Die Erfindung beschränkt sich nicht auf das darge- , stellte Ausführungsbeispiel. So besteht vor allem bei der Gestaltung der Abstandshalter noch ein erheblicher Gestaltungsspielraum. Beispielsweise könnte man statt runder auch rechteckige Querschnitte wählen und die stiftaufnehmenden Teile mit einem Boden versehen, der nicht auf demThe invention is not limited to the exemplary embodiment shown. There is still considerable scope for design, especially when designing the spacers. For example, you could also choose rectangular cross sections instead of round ones and provide the pin-receiving parts with a base that is not on the

Niveau der restlichen Plattenoberfläche liegt. Dementsprechend weit ist der verwendete Begriff "Hohlzylinder" auszulegen.Level of the remaining plate surface. The term "hollow cylinder" must be interpreted accordingly.

Claims (7)

1. Flacher Bildschirm mit einer Matrix aus selektiv ansteuerbaren Bildpunkten, enthaltend a) zwei jeweils zueinander parallele, über einen Rahmen vakuumdicht miteinander verbundene Trägerplatten (Vorderplatte, Rückplatte), die b) auf ihren einander zugewandten Seiten jeweils mindestens eine getrennt ansteuerbare Elektrode tragen und c) beide durch eine Vielzahl von Abstandselementen voneinander distanziert sind, dadurch gekennzeichnet daß die Abstandselemente folgendermaßen beschaffen sind: d) sie bestehen jeweils aus einem von einer der beiden Trägerplatten (1,2) ausgehenden Stift (13) und einem von der anderen Trägerplatte (2) ausgehenden Hohlzylinder (14), wobei e) jeder Stift (13) in einen der Hohlzylinder (14) hineinragt, ohne dabei dessen Seitenwandung zu berühren, und an den Zylinder boden anschlägt, ferner f) Stifte (13) und Hohlzylinder (14) mit den Trägerplatten(1,2), von denen sie jeweils ausgehen, stoffschlüssig verbunden sind und schließlich g) jedem Bildpunkt ein Abstandselement zugeordnet ist. 1. Flat screen with a matrix of selectively controllable pixels, containing a) two mutually parallel carrier plates (front plate, rear plate) connected to one another in a vacuum-tight manner by a frame, the b) each carry at least one separately controllable electrode on their mutually facing sides and c) both are spaced apart from one another by a large number of spacer elements, characterized in that the spacer elements are designed as follows: d) they each consist of a pin (13) emanating from one of the two support plates (1, 2) and a hollow cylinder (14) emanating from the other support plate (2), whereby e) each pin (13) protrudes into one of the hollow cylinders (14) without touching its side wall and strikes the cylinder bottom, further f) pins (13) and hollow cylinder (14) with the carrier plates (1,2), from which they each emanate, are integrally connected and finally g) a spacing element is assigned to each pixel. 2. Bildschirm nach Anspruch 1, dadurch gekennzeichnet, daß die Stifte (13) von der Vorderplatte (1) und die Hohlzylinder (14) von der Rückplatte (2) ausgehen.2. Screen according to claim 1, characterized in that the pins (13) from the front plate (1) and the hollow cylinder (14) from the back plate (2). 3. Bildschirm nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die Stifte (13) und Hohlzylinder (14) einen runden oder einen rechteckigen Querschnitt haben.3. Screen according to claim 1 or 2, characterized in that the pins (13) and hollow cylinder (14) have a round or a rectangular cross section. 4. Bildschirm nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet daß die Stifte (13) oder/und Hohlzylinder (14) mit einer Widerstandsbehafteten Schicht überzogen sind.4. Screen according to one of claims 1 to 3, characterized in that the pins (13) and / and hollow cylinder (14) are coated with a resistive layer. 5. Verfahren zur Herstellung eines Bildschirms gemäß einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Stifte (13) und die Hohlzylinder (14) durch einen Ätzprozeß aus der zugehörigen Trägerplatte (1,2) herausgearbeitet werden.5. A method for producing a screen according to one of claims 1 to 4, characterized in that the pins (13) and the hollow cylinder (14) are worked out by an etching process from the associated carrier plate (1, 2). 6. Verfahren zur Herstellung eines Bildschirms gemäß' einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Stifte (13) und Hohlzylinder (14) durch einen Preßvorgang aus der zugehörigen Trägerplatte (1,2) herausgearbeitet werden.6. A method for producing a screen according to 'one of claims 1 to 4, characterized in that the pins (13) and hollow cylinder (14) are worked out by a pressing process from the associated carrier plate (1,2). 7. Bildschirm nach einem der Ansprüche 1 bis 4, gekennzeichnet durch seine Verwendung zur Darstellung von Fernsehbildern.7. Screen according to one of claims 1 to 4, characterized by its use for displaying television pictures.
EP81106915A 1980-09-29 1981-09-03 Flat image screen, process for manufacturing and using the same Expired EP0048839B1 (en)

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DE19803036671 DE3036671A1 (en) 1980-09-29 1980-09-29 FLAT SCREEN, METHOD FOR ITS PRODUCTION AND USE
DE3036671 1980-09-29

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EP0048839A1 true EP0048839A1 (en) 1982-04-07
EP0048839B1 EP0048839B1 (en) 1984-02-22

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EP (1) EP0048839B1 (en)
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EP0683920A4 (en) * 1993-02-01 1998-04-15 Silicon Video Corp Flat panel device with internal support structure and/or raised black matrix.
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Also Published As

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DE3036671A1 (en) 1982-05-13
US4451759A (en) 1984-05-29
JPS5788656A (en) 1982-06-02
DE3162382D1 (en) 1984-03-29
EP0048839B1 (en) 1984-02-22

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