EP0022893A1 - Image display device - Google Patents

Image display device Download PDF

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Publication number
EP0022893A1
EP0022893A1 EP19800100614 EP80100614A EP0022893A1 EP 0022893 A1 EP0022893 A1 EP 0022893A1 EP 19800100614 EP19800100614 EP 19800100614 EP 80100614 A EP80100614 A EP 80100614A EP 0022893 A1 EP0022893 A1 EP 0022893A1
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EP
European Patent Office
Prior art keywords
display device
image display
gas discharge
cathode
discharge space
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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.)
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EP19800100614
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German (de)
French (fr)
Inventor
Wilhelm Dr. Tiemann
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Siemens AG
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Siemens AG
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Publication of EP0022893A1 publication Critical patent/EP0022893A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H01J17/498—Display panels, e.g. with crossed electrodes, e.g. making use of direct current with a gas discharge space and a post acceleration space for electrons

Definitions

  • the invention relates to an image display device with a gas discharge space, which is separated by a translucent, vacuum-tight partition from an electron acceleration space, which contains both auxiliary electrodes for line advancement and auxiliary electrodes arranged perpendicular to it for brightness control and a photocathode, and is completed with a luminescent screen which can be excited by electrons (German interpretation 26 26 621).
  • the invention is based on the object of further improving this known image display device, in particular the illuminance of the photocathode is to be increased.
  • This object is achieved in that a large-area cathode opposite the partition is provided in the gas discharge space.
  • the negative glow light is generated on the entire surface in front of the cathode.
  • the light falling on the cathode surface is reflected and the illuminance of the photocathode is increased accordingly.
  • the flat side of the cathode facing the partition wall can preferably be provided with a reflective surface, in particular a reflective support.
  • the anode can consist, for example, of a screen or mesh.
  • an electrically conductive part of the housing of the gas discharge space can also be provided as an anode.
  • the housing of the gas discharge space can itself serve as an anode.
  • a particularly advantageous further embodiment of the image display device is obtained in that a device for transforming the wavelength A of the radiation of the negative glow light of the gas discharge is additionally provided in the gas discharge space.
  • the partition consists of glass, for example, it is impermeable to the ultraviolet portion of the radiation. As a result of the transformation to a larger wavelength, this radiation component also reaches the photocathode through the transparent dividing wall and increases its illuminance.
  • the shell of an image display device is denoted by 2
  • a gas discharge space filled with a gas suitable for discharge is denoted by 4
  • an evacuated electron acceleration space by 5.
  • the gas discharge space 4 is separated from the electron acceleration space 5 by a translucent, high-vacuum-tight partition 3.
  • a photocathode 11 and a screen 12 are arranged in the electron acceleration space 5, which may preferably contain a phosphor layer 13 which is provided with a metallic cover 14.
  • the metallic cover 14 prevents the penetration of photons from the gas discharge space (4) to the screen 12 and can be made of aluminum, for example.
  • Both auxiliary electrodes 20 for the line advancement and auxiliary electrodes 22 for the brightness control are provided in the electron acceleration space 5.
  • the auxiliary electrodes 20 for the line advancement are arranged on the flat side of a control plate 24 facing the photocathode 11 in grooves 26 which run horizontally and parallel to one another.
  • This embodiment of the electrode arrangement has the advantage that the control plate '24 can be placed directly onto the photocathode.
  • the auxiliary electrodes 22 for the brightness control are arranged parallel to one another in vertical columns. In each case a crossing point of the row electrodes 20 with the column electrodes 22 forms a control cell and thus a pixel on the screen 12.
  • the control plate 24 is designed as a hole matrix.
  • a hole 28 of the hole matrix is assigned to each crossing point of the control electrodes.
  • each line can contain, for example, 1800 holes, of which three successive holes each form a control cell for a colored pixel. Of these three adjacent holes, one gives the red, another the green and the third the blue portion of the pixel.
  • the hole matrix then contains 625 x 1800 holes, which result in 625 x 600 pixels on the screen 12.
  • the gas discharge space 4 contains a large-area cathode 30, to which an anode 32 is assigned, which can preferably be designed as an electrically conductive part of the housing 2 and is provided with an electrical connection (not specified).
  • the anode 32 can be made, for example, from a metallic coating on the inner. Surface of the gas discharge space exist.
  • the anode 32 can be of almost any design and, for example, also form a closed frame which is placed around the cathode on the narrow surfaces of the cathode 30 and is electrically insulated from the cathode.
  • the negative glow light generated in front of the cathode 30 is reflected by the cathode 30 and this portion of the photons thus also passes through the transparent partition 3 to the photocathode 11, which increases the illuminance of the photocathode 11 and thus the efficiency of the image display device accordingly.
  • the one facing the photocathode 11 The surface of the cathode 30 can therefore be expediently machined, for example polished, to increase the reflection of light. It can also be provided with an additional reflective pad 34.
  • a particularly advantageous design of the image display device is obtained by providing a phosphor layer 36 for transforming the wavelength of the negative glow light on the flat side of the partition 3 facing the gas discharge space 4, which phosphor layer 36 converts the UV component of the negative glow light of the gas discharge into radiation for which the partition 3 is permeable.
  • This increases the illuminance of the photocathode 11 accordingly.
  • a photocathode which essentially contains cesium-antimony Cs 3 Sb and is therefore particularly sensitive to radiation with a wavelength A in the range from about 400 to 450 nm
  • a phosphor that contains zinc oxide Zn0 can be used.
  • the sensitivity maximum of which lies in another range of the wavelength A a luminous phosphor with a correspondingly different radiation maximum is also used

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

In an image display device having a gas discharge chamber (4) which is separated by a translucent, high-vacuum sealed isolating wall (3) from an electron acceleration chamber (5) which is provided with a photocathode (11) and a screen (12) and contains both auxiliary electrodes (20) for line switching as well as auxiliary electrodes (22) for brightness control, a large-area cathode (30) is arranged on the flat side of the gas discharge chamber (4) located opposite the isolating wall (3). In this embodiment, the light incident on the cathode (30) from the negative glow lamp is reflected and the brightness of the photocathode (11) is increased accordingly. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Bildanzeigevorrichtung mit einem Gasentladungsraum, der durch eine lichtdurchlässige, vakuumdichte Trennwand von einem Elektronenbeschleunigungsraum getrennt ist, der sowohl Hilfselektroden zur Zeilenfortschaltung als auch senkrecht dazu angeordnete Hilfselektroden zur Helligkeitssteuerung sowie eine Photokathode enthält und mit einem durch Elektronen anregbaren Leuchtschirm abgeschlossen ist (deutsche Auslegeschrift 26 56 621).The invention relates to an image display device with a gas discharge space, which is separated by a translucent, vacuum-tight partition from an electron acceleration space, which contains both auxiliary electrodes for line advancement and auxiliary electrodes arranged perpendicular to it for brightness control and a photocathode, and is completed with a luminescent screen which can be excited by electrons (German interpretation 26 26 621).

Der Erfindung liegt nun die Aufgabe zugrunde, diese bekannte Bildanzeigevorrichtung weiter zu verbessern, insbesondere soll die Beleuchtungsstärke der Photokathode erhöht werden.The invention is based on the object of further improving this known image display device, in particular the illuminance of the photocathode is to be increased.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß im Gasentladungsraum eine der Trennwand gegenüberliegende großflächige Kathode vorgesehen ist. Das negative Glimmlicht wird auf der ganzen Fläche vor der Kathode erzeugt. Das auf die Kathodenfläche fallende Licht wird reflektiert und die Beleuchtungsstärke der Photokathode entsprechend erhöht. Die der Trennwand zugewandte Flachseite der Kathode kann vorzugsweise mit einer spiegelnden Oberfläche, insbesondere einer spiegelnden Auflage, versehen sein.This object is achieved in that a large-area cathode opposite the partition is provided in the gas discharge space. The negative glow light is generated on the entire surface in front of the cathode. The light falling on the cathode surface is reflected and the illuminance of the photocathode is increased accordingly. The flat side of the cathode facing the partition wall can preferably be provided with a reflective surface, in particular a reflective support.

Die Anode kann beispielsweise aus einem Sieb- oder Maschengitter bestehen. In einer besonderen Ausführungsform der Bildanzeigevorrichtung kann auch ein elektrisch leitender Teil des Gehäuses des Gasentladungsraumes als Anode vorgesehen sein. In einer Ausführungsform der Vorrichtung mit einem metallischen Gehäuse kann das Gehäuse des Gasentladungsraumes auch selbst als Anode dienen.The anode can consist, for example, of a screen or mesh. In a special embodiment of the image display device, an electrically conductive part of the housing of the gas discharge space can also be provided as an anode. In one embodiment of the device with a metallic housing, the housing of the gas discharge space can itself serve as an anode.

Eine besonders vorteilhafte weitere Ausgestaltung der Bildanzeigevorrichtung erhält man dadurch, daß im Gasentladungsraum zusätzlich eine Vorrichtung zur Transformation der Wellenlänge A der Strahlung des negativen Glimmlichts der Gasentladung vorgesehen ist. Besteht die Trennwand beispielsweise aus Glas, so ist sie für den Ultraviolett-Anteil der Strahlung undurchlässig. Durch die Transformation zu einer größeren Wellenlänge gelangt auch dieser Strahlungsanteil durch die transparente Trennwand in den Beschleunigungsraum zur Photokathode und erhöht deren Beleuchtungsstärke.A particularly advantageous further embodiment of the image display device is obtained in that a device for transforming the wavelength A of the radiation of the negative glow light of the gas discharge is additionally provided in the gas discharge space. If the partition consists of glass, for example, it is impermeable to the ultraviolet portion of the radiation. As a result of the transformation to a larger wavelength, this radiation component also reaches the photocathode through the transparent dividing wall and increases its illuminance.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung Bezug genommen, in der ein Ausführungsbeispiel einer Bildanzeigevorrichtung nach der Erfindung als Schnitt schematisch veranschaulicht ist.To further explain the invention, reference is made to the drawing, in which an exemplary embodiment of an image display device according to the invention is schematically illustrated as a section.

In der Figur ist die Hülle einer Bildanzeigevorrichtung mit 2, ein mit einem zur Entladung geeigneten Gas gefüllter Gasentladungsraum mit 4 und ein evakuierter Elektronenbeschleunigungsraum mit 5 bezeichnet. Der Gasentladungsraum 4 ist vom Elektronenbeschleunigungsraum 5 durch eine lichtdurchlässige, hochvakuumdichte Trennwand 3 getrennt. Im Elektronenbeschleunigungsraum 5 sind eine Photokathode 11 und ein Bildschirm 12 angeordnet, der vorzugsweise eine Leuchtphosphorschicht 13 enthalten kann, die mit einer metallischen Abdeckung 14 versehen ist. Die metallische Abdeckung 14 verhindert das Durchdringen von Photonen aus dem Gasentladungsraum (4) zum Bildschirm 12 und kann beispielsweise aus Aluminium bestehen.In the figure, the shell of an image display device is denoted by 2, a gas discharge space filled with a gas suitable for discharge is denoted by 4 and an evacuated electron acceleration space by 5. The gas discharge space 4 is separated from the electron acceleration space 5 by a translucent, high-vacuum-tight partition 3. A photocathode 11 and a screen 12 are arranged in the electron acceleration space 5, which may preferably contain a phosphor layer 13 which is provided with a metallic cover 14. The metallic cover 14 prevents the penetration of photons from the gas discharge space (4) to the screen 12 and can be made of aluminum, for example.

Im Elektronenbeschleunigungsraum 5 sind sowohl Hilfselektroden 20 für die Zeilenfortschaltung als auch Hilfselektroden 22 für die Helligkeitssteuerung vorgesehen. Die Hilfselektroden 20 für die Zeilenfortschaltung sind auf der der Photokathode 11 zugewandten Flachseite einer Steuerplatte 24 in Nuten 26 angeordnet, die waagrecht und parallel zueinander verlaufen. Diese Ausführungsform der Elektrodenanordnung hat den Vorteil, daß die Steuerplatte'24 auf die Photokathode direkt aufgelegt werden kann. Auf der dem Bildschirm 12 zugewandten Flachseite der Steuerplatte 24 sind die Hilfselektroden 22 für die Helligkeitssteuerung in senkrechten Spalten parallel zueinander angeordnet. Jeweils ein Kreuzungspunkt der Zeilenelektroden 20 mit den Spaltenelektroden 22 bildet eine Steuerzelle und damit einen Bildpunkt auf dem Bildschirm 12. Zu diesem Zweck ist die Steuerplatte 24 als Lochmatrix ausgebildet. Jedem Kreuzungspunkt der Steuerelektroden ist eine Bohrung 28 der Lochmatrix zugeordnet. In einer Ausführungsform der Bildanzeigevorrichtung für farbige Fernsehbilder mit beispielsweise 625 Zeilen kann jede Zeile beispielsweise 1800 Löcher enthalten, von denen jeweils drei aufeinander folgende Löcher eine Steuerzelle für einen farbigen Bildpunkt bilden. Von diesen drei nebeneinanderliegenden Löchern ergibt eines den Rot-, ein anderes den Grün- und das Dritte den Blauanteil des Bildpunktes. Die Lochmatrix enthält dann 625 x 1800 Löcher, die 625 x 600 Bildpunkte auf dem Bildschirm 12 ergeben.Both auxiliary electrodes 20 for the line advancement and auxiliary electrodes 22 for the brightness control are provided in the electron acceleration space 5. The auxiliary electrodes 20 for the line advancement are arranged on the flat side of a control plate 24 facing the photocathode 11 in grooves 26 which run horizontally and parallel to one another. This embodiment of the electrode arrangement has the advantage that the control plate '24 can be placed directly onto the photocathode. On the flat side of the control plate 24 facing the screen 12, the auxiliary electrodes 22 for the brightness control are arranged parallel to one another in vertical columns. In each case a crossing point of the row electrodes 20 with the column electrodes 22 forms a control cell and thus a pixel on the screen 12. For this purpose, the control plate 24 is designed as a hole matrix. A hole 28 of the hole matrix is assigned to each crossing point of the control electrodes. In one embodiment of the image display Device for colored television pictures with, for example, 625 lines, each line can contain, for example, 1800 holes, of which three successive holes each form a control cell for a colored pixel. Of these three adjacent holes, one gives the red, another the green and the third the blue portion of the pixel. The hole matrix then contains 625 x 1800 holes, which result in 625 x 600 pixels on the screen 12.

Der Gasentladungsraum 4 enthält an seiner der Trennwand 3 gegenüberliegenden Flachseite eine großflächige Kathode 30, der eine Anode 32 zugeordnet ist, die vorzugsweise als elektrisch leitender Teil des Gehäuses 2 ausgeführt sein kann und mit einem nicht näher bezeichneten elektrischen Anschluß versehen ist.On its flat side opposite the partition 3, the gas discharge space 4 contains a large-area cathode 30, to which an anode 32 is assigned, which can preferably be designed as an electrically conductive part of the housing 2 and is provided with an electrical connection (not specified).

In einer Ausführungsform der Bildanzeigevorrichtung mit einem Gehäuse 2 aus Glas kann die Anode 32 beispielsweise aus einer metallischen Auflage an der inneren. Oberfläche des Gasentladungsraumes bestehen. Die Anode 32 kann in dieser Ausführungsform der Kathode 30 nahezu beliebig gestaltet sein und beispielsweise auch einen geschlossenen Rahmen bilden, der an den Schmalflächen der Kathode 30 um die Kathode herumgelegt und gegenüber der Kathode elektrisch isoliert ist.In one embodiment of the image display device with a housing 2 made of glass, the anode 32 can be made, for example, from a metallic coating on the inner. Surface of the gas discharge space exist. In this embodiment of the cathode 30, the anode 32 can be of almost any design and, for example, also form a closed frame which is placed around the cathode on the narrow surfaces of the cathode 30 and is electrically insulated from the cathode.

Das vor der Kathode 30 erzeugte negative Glimmlicht wird von der Kathode 30 reflektiert und dieser Anteil der Photonen gelangt somit ebenfalls durch die lichtdurchlässige Trennwand 3 zur Photokathode 11, womit die Beleuchtungsstärke der Photokathode 11 und damit der Wirkungsgrad der Bildanzeigevorrichtung entsprechend erhöht wird. Die der Photokathode 11 zugewandte Oberfläche der Kathode 30 kann deshalb zweckmäßig zur Erhöhung der Lichtreflexion besonders bearbeitet, beispielsweise poliert, sein. Sie kann ferner mit einer zusätzlichen spiegelnden Auflage 34 versehen sein.The negative glow light generated in front of the cathode 30 is reflected by the cathode 30 and this portion of the photons thus also passes through the transparent partition 3 to the photocathode 11, which increases the illuminance of the photocathode 11 and thus the efficiency of the image display device accordingly. The one facing the photocathode 11 The surface of the cathode 30 can therefore be expediently machined, for example polished, to increase the reflection of light. It can also be provided with an additional reflective pad 34.

Eine besonders vorteilhafte Gestaltung der Bildanzeigevorrichtung erhält man dadurch, daß zur Transformation der Wellenlänge des negativen Glimmlichts auf der dem Gasentladungsraum 4 zugewandten Flachseite der Trennwand 3 eine Leuchtphosphorschicht 36 vorgesehen ist, die den UV-Anteil des negativen Glimmlichts der Gasentladung in Strahlung umwandelt, für die die Trennwand 3 durchlässig ist. Dadurch wird die Beleuchtungsstärke der Photokathode 11 entsprechend erhöht. In Verbindung mit einer Photokathode, die im wesentlichen Cäsium-Antimon Cs3Sb enthält und somit für Strahlung mit einer Wellenlänge A im Bereich von etwa 400 bis 450 nm besonders empfindlich ist, kann beispielsweise ein Leuchtphosphor verwendet werden, der Zinkoxid Zn0 enthält. In Verbindung mit einer Photokathode 11, deren Empfindlichkeitsmaximum in einem anderen Bereich der Wellenlänge A liegt, wird auch ein Leuchtphosphor mit entsprechend abweichendem Strahlungsmaximum verwendetA particularly advantageous design of the image display device is obtained by providing a phosphor layer 36 for transforming the wavelength of the negative glow light on the flat side of the partition 3 facing the gas discharge space 4, which phosphor layer 36 converts the UV component of the negative glow light of the gas discharge into radiation for which the partition 3 is permeable. This increases the illuminance of the photocathode 11 accordingly. In connection with a photocathode, which essentially contains cesium-antimony Cs 3 Sb and is therefore particularly sensitive to radiation with a wavelength A in the range from about 400 to 450 nm, for example, a phosphor that contains zinc oxide Zn0 can be used. In conjunction with a photocathode 11, the sensitivity maximum of which lies in another range of the wavelength A, a luminous phosphor with a correspondingly different radiation maximum is also used

Claims (7)

1. Bildanzeigevorrichtung mit einem Gasentladungsraum, der durch eine lichtdurchlässige, vakuumdichte Trennwand von einem Elektronenbeschleunigungsraum getrennt ist, der sowohl Hilfselektroden zur Zeilenfortschaltung als auch senkrecht dazu angeordnete Hilfselektroden zur Helligkeitssteuerung sowie eine Photokathode enthält und mit einem durch Elektronen anregbaren Leuchtschirm abgeschlossen ist, dadurch gekennzeichnet , daß im Gasentladungsraum (4) eine der Trennwand (3) gegenüberliegende großflächige Kathode (30) vorgesehen ist.1. Image display device with a gas discharge space, which is separated by a translucent, vacuum-tight partition from an electron acceleration space, which contains both auxiliary electrodes for line advancement as well as auxiliary electrodes arranged perpendicularly to it for brightness control as well as a photocathode and is terminated with a fluorescent screen that can be excited by electrons, characterized in that that a large-area cathode (30) opposite the partition (3) is provided in the gas discharge space (4). 2. Bildanzeigevorrichtung nach Anspruch 1, dadurch gekennzeichnet , daß die der Trennwand (3) zugewandte Flachseite der Kathode (30) mit einer spiegelnden Oberfläche versehen ist.2. Image display device according to claim 1, characterized in that the flat side of the cathode (30) facing the partition (3) is provided with a reflecting surface. 3. Bildanzeigevorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß ein elektrisch leitender Teil des Gehäuses (2) des Gasentladungsraumes (4) als Anode (32) vorgesehen ist.3. Image display device according to claim 1 or 2, characterized in that an electrically conductive part of the housing (2) of the gas discharge space (4) is provided as an anode (32). 4. Bildanzeigevorrichtung fach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet , daß die Anode als Rahmen gestaltet ist, der um die Schmalflächen der Kathode (30) und konzentrisch zur Kathode (30) angeordnet ist.4. Image display device compartment one of claims 1 to 3, characterized in that the anode is designed as a frame which is arranged around the narrow surfaces of the cathode (30) and concentrically to the cathode (30). 5. Bildanzeigevorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet , daß im Gasentladungsraum (4) eine Vorrichtung zur Transformation der Wellenlänge (λ) der Strahlung des negativen Glimmlichts der Gasentladung vorgesehen ist.5. Image display device according to one of claims 1 to 4, characterized in that a device for transforming the wavelength (λ) of the radiation of the negative glow light of the gas discharge is provided in the gas discharge space (4). 6. Bildanzeigevorrichtung nach Anspruch 5, dadurch gekennzeichnet , daß die dem Gasentladungsraum (4) zugewandte Flachseite der Trennwand (3) mit einer Leuchtphosphorschicht (36) versehen ist.6. Image display device according to claim 5, characterized in that the gas discharge space (4) facing flat side of the partition (3) is provided with a phosphor layer (36). 7. Bildanzeigevorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß ein Leuchtphosphor vorgesehen ist, der in dem Bereich der Wellenlänge (λ) sein Maximum der spektralen Emission hat, in dem die Photokathode (11) ihr Empfindlichkeitsmaximum hat.7. Image display device according to claim 6, characterized in that a luminous phosphor is provided which has its maximum of the spectral emission in the region of the wavelength (λ) in which the photocathode (11) has its maximum sensitivity.
EP19800100614 1979-07-18 1980-02-06 Image display device Withdrawn EP0022893A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792929080 DE2929080A1 (en) 1979-07-18 1979-07-18 IMAGE DISPLAY DEVICE
DE2929080 1979-07-18

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EP0022893A1 true EP0022893A1 (en) 1981-01-28

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JP (1) JPS5618352A (en)
DE (1) DE2929080A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834900A2 (en) * 1996-10-04 1998-04-08 International Business Machines Corporation Display device
US6008573A (en) * 1996-10-04 1999-12-28 International Business Machines Corporation Display devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328849A1 (en) * 1972-06-02 1973-12-20 Matsushita Electric Ind Co Ltd DISPLAY AND PICTURE PANEL
DE2534393A1 (en) * 1974-08-29 1976-03-11 Burroughs Corp PLUG-IN DISPLAY BOARD
DE2615721A1 (en) * 1976-04-09 1977-10-13 Siemens Ag GAS DISCHARGE INDICATOR
DE2656621A1 (en) * 1976-12-14 1978-06-15 Siemens Ag PLASMA IMAGE DISPLAY DEVICE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2328849A1 (en) * 1972-06-02 1973-12-20 Matsushita Electric Ind Co Ltd DISPLAY AND PICTURE PANEL
DE2534393A1 (en) * 1974-08-29 1976-03-11 Burroughs Corp PLUG-IN DISPLAY BOARD
DE2615721A1 (en) * 1976-04-09 1977-10-13 Siemens Ag GAS DISCHARGE INDICATOR
DE2656621A1 (en) * 1976-12-14 1978-06-15 Siemens Ag PLASMA IMAGE DISPLAY DEVICE

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0834900A2 (en) * 1996-10-04 1998-04-08 International Business Machines Corporation Display device
EP0834900A3 (en) * 1996-10-04 1998-04-29 International Business Machines Corporation Display device
US5889363A (en) * 1996-10-04 1999-03-30 International Business Machines Corporation Display devices
US6008573A (en) * 1996-10-04 1999-12-28 International Business Machines Corporation Display devices

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JPS5618352A (en) 1981-02-21
DE2929080A1 (en) 1981-02-05

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