[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0022892B1 - Image display device - Google Patents

Image display device Download PDF

Info

Publication number
EP0022892B1
EP0022892B1 EP80100613A EP80100613A EP0022892B1 EP 0022892 B1 EP0022892 B1 EP 0022892B1 EP 80100613 A EP80100613 A EP 80100613A EP 80100613 A EP80100613 A EP 80100613A EP 0022892 B1 EP0022892 B1 EP 0022892B1
Authority
EP
European Patent Office
Prior art keywords
gas discharge
image display
display device
auxiliary electrodes
face
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
Application number
EP80100613A
Other languages
German (de)
French (fr)
Other versions
EP0022892A1 (en
Inventor
Wilhelm Dr. Tiemann
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.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0022892A1 publication Critical patent/EP0022892A1/en
Application granted granted Critical
Publication of EP0022892B1 publication Critical patent/EP0022892B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • 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 having an electron acceleration space, which is closed off by an electronically stimulable screen and is separated from a gas discharge space by a transparent, high-vacuum-tight partition.
  • Both the auxiliary electrodes for advancing the gas discharge in a row, so-called row electrodes, and auxiliary electrodes for brightness control, so-called column electrodes, arranged perpendicularly thereto, can be arranged in the gas discharge space (German specification No. 2656621).
  • the invention is based on the object of further improving the known image display device with a separate gas discharge and electron acceleration path, in particular the structure of the device is to be simplified.
  • the auxiliary electrodes for line advancement and brightness control simultaneously take on the function of the cathode or anode for gas discharge.
  • the control plates are placed against one another with the flat sides on which the strip-shaped auxiliary electrodes are each arranged parallel to one another.
  • the slots give them a sufficient distance so that special electrical insulation is not necessary.
  • the individual auxiliary electrodes for line advancement each form a gas discharge cell with a crossing point of the auxiliary electrodes arranged perpendicular to them for brightness control, the photons of which reach the photocathode through the hole in the hole matrix assigned to the crossing point and trigger electrons there.
  • the cross section of the light beam passing through the hole in the cell from the glow light is thus limited accordingly, so that the diameter of the light spot created on the screen does not differ significantly from the diameter of the hole.
  • the illuminance of the photocathode can be significantly increased in that a special device for transforming the wavelength of the radiation of the negative glow light of the gas discharge is provided in the gas discharge space.
  • a special device for transforming the wavelength of the radiation of the negative glow light of the gas discharge is provided in the gas discharge space.
  • the flat side of the partition facing the gas discharge space can be provided with a phosphor luminescent layer which has its maximum of spectral emission in the range of the wavelength in which the photocathode has its maximum sensitivity.
  • the UV component of the negative glow light of the gas discharge is also made effective in this phosphor layer. This is because the phosphor layer converts the UV radiation into radiation which can pass through the partition and whose wavelength lies in the sensitivity maximum of the photocathode.
  • the evacuated electron acceleration chamber only contains the screen and the photocathode and is therefore of a correspondingly simple construction.
  • FIGS. 1 and 2 an exemplary embodiment of an image display device according to the invention is schematically illustrated as a section.
  • 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 transparent, vacuum-tight partition 3.
  • a photocathode 11 and a screen 12 are also arranged in the electron acceleration space, which can preferably consist of a phosphor layer 13 which is provided with a metallic cover 14. This metallic cover 14 prevents the penetration of photons to the screen and can be made of aluminum, for example.
  • the gas discharge space 4 contains a cathode plate 20, which is provided on its flat side opposite the partition 3 with auxiliary electrodes 22 arranged parallel to one another for the line advancement. These auxiliary electrodes 22 act as a cathode for the gas discharge, so that a special cathode in the gas discharge space 4 is not required.
  • the cathode plate 20 is designed as a hole matrix.
  • the holes 24 are distributed in the plate such that the openings of a horizontal row of holes 24 are arranged in one of the auxiliary electrodes 22 for the line advancement.
  • the gas discharge space 4 also contains an anode plate 26, which is provided on its flat side facing the cathode plate 20 with parallel and perpendicular grooves, in each of which a strip-shaped auxiliary electrode 32 for brightness control is arranged.
  • each row can contain 1800 holes, three of which each form a control cell for a colored pixel. Of these three adjacent holes, one is used for the red, the other for the green and the third for 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.
  • a glow light arises in the groove, which can be seen in the sectional view according to FIG. 2 and is designated 34, in front of the hole 24 in question, the photons of which as light beams through the hole and translucent partition 3 reach the photocathode 11.
  • a hole has a light-guiding effect through the holes 24 of the hole matrix, so that the light spot created on the screen 12 does not significantly exceed the diameter of the hole 24.
  • the light-guiding effect of the hole matrix 20 on the photons of the gas discharge depends on the thickness of the cathode plate 20, which is essentially determined by the thickness of the partition 3.
  • the cathode plate can be about 2 to 20 mm, preferably about 5 to 10 mm, thick.
  • a particularly advantageous design of the image display device is obtained by providing the partition 3 on its flat side facing the gas discharge space 4 with a phosphor layer 36 which converts the UV component of the negative glow light of the gas discharge into radiation for which the partition 3 is transparent.
  • 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 ⁇ 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 luminous phosphor 36 with a correspondingly different radiation maximum is also used.

Landscapes

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

Description

Die Erfindung bezieht sich auf eine Bildanzeigevorrichtung mit einem Elektronenbeschleunigungsraum, der mit einem durch Elektronen anregbaren Bildschirm abgeschlossen und durch eine lichtdurchlässige, hochvakuumdichte Trennwand von einem Gasentladungsraum getrennt ist. Sowohl die Hilfselektroden zur Zeilenfortschaltung der Gasentladung, sogenannte Zeilenelektroden, als auch senkrecht dazu angeordnete Hilfselektroden zur Helligkeitssteuerung, sogenannte Spaltenelektroden, können im Gasentladungsraum angeordnet sein (deutsche Auslegeschrift Nr. 2656621).The invention relates to an image display device having an electron acceleration space, which is closed off by an electronically stimulable screen and is separated from a gas discharge space by a transparent, high-vacuum-tight partition. Both the auxiliary electrodes for advancing the gas discharge in a row, so-called row electrodes, and auxiliary electrodes for brightness control, so-called column electrodes, arranged perpendicularly thereto, can be arranged in the gas discharge space (German specification No. 2656621).

Es ist ferner bekannt, diese Hilfselektroden jeweils in Nuten einer transparenten Steuerplatte anzuordnen. Die mit den Nuten versehenen Flachseiten der Steuerplatten werden dann so aneinandergelegt, dass sich die Hilfselektroden der verschiedenen Steuerplatten kreuzen und eine Matrix aus Zeilen und Spalten bilden (US-Patentschrift Nr. 3096516).It is also known to arrange these auxiliary electrodes in grooves in a transparent control plate. The grooved flat sides of the control plates are then placed together so that the auxiliary electrodes of the various control plates cross and form a matrix of rows and columns (US Pat. No. 3096516).

Der Erfindung liegt nun die Aufgabe zugrunde, die bekannte Bildanzeigevorrichtung mit einer getrennten Gasentladungs- und Elektronenbeschleunigungsstrecke weiter zu verbessern, insbesondere soll der Aufbau der Vorrichtung vereinfacht werden.The invention is based on the object of further improving the known image display device with a separate gas discharge and electron acceleration path, in particular the structure of the device is to be simplified.

Diese Aufgabe wird erfindungsgemäss gelöst mit den kennzeichnenden Merkmalen des Anspruchs 1. In dieser Ausführungsform der Bildanzeigevorrichtung übernehmen die Hilfselektroden für die Zeilenfortschaltung und Helligkeitssteuerung zugleich die Funktion der Kathode bzw. Anode für die Gasentladung. Die Steuerplatten werden mit den Flachseiten aneinandergelegt, an denen die streifenförmigen Hilfselektroden jeweils parallel zueinander angeordnet sind. Durch die Nuten erhalten sie einen ausreichenden Abstand, so dass eine besondere elektrische Isolation nicht erforderlich ist.This object is achieved according to the invention with the characterizing features of claim 1. In this embodiment of the image display device, the auxiliary electrodes for line advancement and brightness control simultaneously take on the function of the cathode or anode for gas discharge. The control plates are placed against one another with the flat sides on which the strip-shaped auxiliary electrodes are each arranged parallel to one another. The slots give them a sufficient distance so that special electrical insulation is not necessary.

Die einzelnen Hilfselektroden für die Zeilenfortschaltung bilden jeweils mit einem Kreuzungspunkt der senkrecht zu ihnen angeordneten Hilfselektroden für die Helligkeitssteuerung eine Gasentladungszelle, deren Photonen durch das dem Kreuzungspunkt zugeordnete Loch der Lochmatrix die Photokathode erreichen und dort Elektronen auslösen. Der Querschnitt des vom Glimmlicht durch das Loch der Zelle hindurchtretenden Lichtbündels wird somit entsprechend begrenzt, so dass der Durchmesser des auf dem Bildschirm entstehenden Lichtpunktes vom Durchmesser des Loches nicht wesentlich abweicht.The individual auxiliary electrodes for line advancement each form a gas discharge cell with a crossing point of the auxiliary electrodes arranged perpendicular to them for brightness control, the photons of which reach the photocathode through the hole in the hole matrix assigned to the crossing point and trigger electrons there. The cross section of the light beam passing through the hole in the cell from the glow light is thus limited accordingly, so that the diameter of the light spot created on the screen does not differ significantly from the diameter of the hole.

Die Beleuchtungsstärke der Photokathode kann in einer besonderen Ausführungsform der Bildanzeigevorrichtung dadurch noch wesentlich erhöht werden, dass im Gasentladungsraum eine besondere Vorrichtung zur Transformation der Wellenlänge der Strahlung des negativen Glimmlichts der Gasentladung vorgesehen ist. Beispielsweise kann die dem Gasentladungsraum zugewandte Flachseite der Trennwand mit einer Phosphorleuchtschicht versehen werden, die in dem Bereich der Wellenlänge ihr Maximum der spektralen Emission hat, in dem die Photokathode ihr Empfindlichkeitsmaximum hat. In dieser Phosphorschicht wird auch noch der UV-Anteil des negativen Glimmlichts der Gasentladung wirksam gemacht. Die Phosphorschicht wandelt nämlich die UV-Strahlung in eine Strahlung um, die durch die Trennwand hindurchtreten kann und deren Wellenlänge im Empfindlichkeitsmaximum der Photokathode liegt.In a special embodiment of the image display device, the illuminance of the photocathode can be significantly increased in that a special device for transforming the wavelength of the radiation of the negative glow light of the gas discharge is provided in the gas discharge space. For example, the flat side of the partition facing the gas discharge space can be provided with a phosphor luminescent layer which has its maximum of spectral emission in the range of the wavelength in which the photocathode has its maximum sensitivity. The UV component of the negative glow light of the gas discharge is also made effective in this phosphor layer. This is because the phosphor layer converts the UV radiation into radiation which can pass through the partition and whose wavelength lies in the sensitivity maximum of the photocathode.

Der evakuierte Elektronenbeschleunigungsraum enthält nur noch den Bildschirm und die Photokathode und hat somit einen entsprechend einfachen Aufbau.The evacuated electron acceleration chamber only contains the screen and the photocathode and is therefore of a correspondingly simple construction.

Zur weiteren Erläuterung der Erfindung wird auf die Zeichnung Bezug genommen, in deren Fig. 1 und 2 ein Ausführungsbeispiel einer Bildanzeigevorrichtung nach der Erfindung jeweils als Schnitt schematisch veranschaulicht ist.To further explain the invention, reference is made to the drawing, in FIGS. 1 and 2 of which an exemplary embodiment of an image display device according to the invention is schematically illustrated as a section.

In Fig. 1 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 vakuumdichte Trennwand 3 getrennt. Im Elektronenbeschleunigungsraum sind ferner eine Photokathode 11 und ein Bildschirm 12 angeordnet, der vorzugsweise aus einer Leuchtphosphorschicht 13 bestehen kann, die mit einer metallischen Abdeckung 14 versehen ist. Diese metallische Abdeckung 14 verhindert das Durchdringen von Photonen zum Bildschirm und kann beispielsweise aus Aluminium bestehen.In FIG. 1, 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 transparent, vacuum-tight partition 3. A photocathode 11 and a screen 12 are also arranged in the electron acceleration space, which can preferably consist of a phosphor layer 13 which is provided with a metallic cover 14. This metallic cover 14 prevents the penetration of photons to the screen and can be made of aluminum, for example.

Der Gasentladungsraum 4 enthält eine Kathodenplatte 20, die auf ihrer der Trennwand 3 gegenüberliegenden Flachseite mit parallel zueinander angeordneten Hilfselektroden 22 für die Zeilenfortschaltung versehen ist. Diese Hilfselektroden 22 wirken als Kathode für die Gasentladung, so dass eine besondere Kathode im Gasentladungsraum 4 nicht erforderlich ist. Die Kathodenplatte 20 ist als Lochmatrix gestaltet. Die Löcher 24 sind in der Platte so verteilt, dass jeweils die Öffnungen einer waagrechten Reihe von Löchern 24 in einer der Hilfselektroden 22 für die Zeilenfortschaltung angeordnet sind. Der Gasentladungsraum 4 enthält ferner eine Anodenplatte 26, die an ihrer der Kathodenplatte 20 zugewandten Flachseite mit parallel zueinander und senkrecht angeordneten Nuten versehen ist, in denen jeweils eine streifenförmige Hilfselektrode 32 für die Helligkeitssteuerung angeordnet ist. Diese Streifenelektroden sind in der Figur gestrichelt angedeutet. Im Kreuzungspunkt einer Hilfselektrode 22 für die Zeilenfortschaltung mit einer der im Boden einer Nutangeordneten Hilfselektroden 32 für die Helligkeitssteuerung entsteht jeweils eine Entladungszelle für die Gasentladung. In einer Ausführungsform der Bildanzeigevorrichtung für farbige Fernsehbilder mit beispielsweise 625 Zeilen kann jede Zeile beispielsweise 1800 Löcher enthalten, von denen jeweils drei aufeinanderfolgende Löcher eine Steuerzelle für einen farbigen Bildpunkt bilden. Von diesen drei nebeneinanderliegenden Löchern dient eines für den Rot-, das weitere für den Grün- und das dritte für den Blauanteil des Bildpunktes. Die Lochmatrix enthält dann 625 x 1800 Löcher, die 625 x 600 Bildpunkte auf dem Bildschirm 12 ergeben.The gas discharge space 4 contains a cathode plate 20, which is provided on its flat side opposite the partition 3 with auxiliary electrodes 22 arranged parallel to one another for the line advancement. These auxiliary electrodes 22 act as a cathode for the gas discharge, so that a special cathode in the gas discharge space 4 is not required. The cathode plate 20 is designed as a hole matrix. The holes 24 are distributed in the plate such that the openings of a horizontal row of holes 24 are arranged in one of the auxiliary electrodes 22 for the line advancement. The gas discharge space 4 also contains an anode plate 26, which is provided on its flat side facing the cathode plate 20 with parallel and perpendicular grooves, in each of which a strip-shaped auxiliary electrode 32 for brightness control is arranged. These strip electrodes are indicated by dashed lines in the figure. At the intersection of an auxiliary electrode 22 for advancing the line with one of the auxiliary electrodes 32 arranged in the bottom of a groove for the brightness control, a discharge cell for the gas discharge is created in each case. In one embodiment of the image display device for colored television images with, for example, 625 lines For example, each row can contain 1800 holes, three of which each form a control cell for a colored pixel. Of these three adjacent holes, one is used for the red, the other for the green and the third for 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.

Mit der Steuerung wenigstens einer der Zeilenelektroden 22 und einer der Spaltenelektroden 32 entsteht in der Nut, die der Schnittdarstellung nach Fig. 2 zu entnehmen und mit 34 bezeichnet ist, vor dem betreffenden Loch 24 ein Glimmlicht, dessen Photonen als Lichtbündel durch das Loch und die lichtdurchlässige Trennwand 3 zur Photokathode 11 gelangen. Durch die Löcher 24 der Lochmatrix entsteht eine Lichtleitwirkung, so dass der auf dem Bildschirm 12 entstehende Lichtpunkt den Durchmesser des Loches 24 nicht wesentlich überschreitet. Der Abstand der Löcher 24 voneinander und der Abstand der Kathodenplatte 20 von dem Bildschirm 12 sowie die Schichtdicken derfür die Wirkungsweise der Bildanzeigevorrichtung notwendigen Teile sind in der Figur zur Verdeutlichung wesentlich vergrössert dargestellt. Die Lichtleitwirkung der Lochmatrix 20 auf die Photonen der Gasentladung ist abhängig von der Dicke der Kathodenplatte 20, die wesentlich bestimmt wird durch die Dicke der Trennwand 3. In Verbindung mit einer Trennwand von beispielsweise etwa 1 bis 5 mm, vorzugsweise etwa 2 bis 3 mm, kann die Kathodenplatte beispielsweise etwa 2 bis 20 mm, vorzugsweise etwa 5 bis 10 mm, dick sein.With the control of at least one of the row electrodes 22 and one of the column electrodes 32, a glow light arises in the groove, which can be seen in the sectional view according to FIG. 2 and is designated 34, in front of the hole 24 in question, the photons of which as light beams through the hole and translucent partition 3 reach the photocathode 11. A hole has a light-guiding effect through the holes 24 of the hole matrix, so that the light spot created on the screen 12 does not significantly exceed the diameter of the hole 24. The distance of the holes 24 from one another and the distance of the cathode plate 20 from the screen 12 as well as the layer thicknesses of the parts necessary for the mode of operation of the image display device are shown significantly enlarged in the figure for clarification. The light-guiding effect of the hole matrix 20 on the photons of the gas discharge depends on the thickness of the cathode plate 20, which is essentially determined by the thickness of the partition 3. In connection with a partition of, for example, approximately 1 to 5 mm, preferably approximately 2 to 3 mm, For example, the cathode plate can be about 2 to 20 mm, preferably about 5 to 10 mm, thick.

Eine besonders vorteilhafte Gestaltung der Bildanzeigevorrichtung erhält man dadurch, dass die Trennwand 3 auf ihrer dem Gasentladungsraum 4 zugewandten Flachseite mit einer Phosphorschicht 36 versehen wird, die den UV-Anteil des negativen Glimmlichts der Gasentladung in Strahlung umwandeltfürdie 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 λ 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 λ liegt, wird auch ein Leuchtphosphor 36 mit entsprechend abweichendem Strahlungsmaximum verwendet.A particularly advantageous design of the image display device is obtained by providing the partition 3 on its flat side facing the gas discharge space 4 with a phosphor layer 36 which converts the UV component of the negative glow light of the gas discharge into radiation for which the partition 3 is transparent. 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 λ 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 λ, a luminous phosphor 36 with a correspondingly different radiation maximum is also used.

Claims (5)

1. An image display device comprising an electron acceleration chamber (5) which is closed off by a screen (12), which can be excited by electrons, and which chamber is separated by a light permeable high vacuum-tight partition wall (3) from a gas discharge chamber (4) which contains both auxiliary electrodes (22) for line feed as well as auxiliary electrodes (32), arranged at right angles to the former, for brightness control, characterised in that the auxiliary electrodes (22) for the line feed of the gas discharge are arranged on one face of a cathode plate (20), and the auxiliary electrodes (32) for the brightness control are arranged in the gas discharge chamber (4) in grooves (34) in one face of an anode plate (26); and that the cathode plate (20) which adjoins the partition wall (3) is constructed to have holes therein in matrix formation and the face thereof facing towards the anode plate (26), is provided with the auxiliary electrodes (22) for the line feed.
2. An image display device according to claim 1, characterised in that the face of the anode plate (26) facing towards the cathode plate (20) is provided with grooves (34) in which are arranged the auxiliary electrodes (32) for the brightness control (fig. 2).
3. An image display device according to claim 1 or claim 2, characterised in that a device for the transformation of the wavelength (λ) of the radiation of the negative glow of the gas discharge is arranged in the gas discharge chamber (4).
4. An image display device according to claim 3, characterised in that the face of the partition wall (3) which faces towards the gas discharge chamber (4) is provided with a luminescent phosphor (36) (fig. 1 and 2).
5. An image display device according to claim 4, characterised in that a luminescent phosphor (36) is provided, the spectral emission maximum of which lies in that range of the wavelength (λ) in which the photocathode (11) has its maximum sensitivity.
EP80100613A 1979-07-18 1980-02-06 Image display device Expired EP0022892B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2929098 1979-07-18
DE19792929098 DE2929098A1 (en) 1979-07-18 1979-07-18 IMAGE DISPLAY DEVICE

Publications (2)

Publication Number Publication Date
EP0022892A1 EP0022892A1 (en) 1981-01-28
EP0022892B1 true EP0022892B1 (en) 1983-05-18

Family

ID=6076076

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100613A Expired EP0022892B1 (en) 1979-07-18 1980-02-06 Image display device

Country Status (3)

Country Link
EP (1) EP0022892B1 (en)
JP (1) JPS5618351A (en)
DE (2) DE2929098A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH067111B2 (en) * 1986-03-01 1994-01-26 リコ−精器株式会社 Gas detector

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096516A (en) * 1960-04-12 1963-07-02 David W Pendleton Transparent electronic display systems
NL154617B (en) * 1970-08-22 1977-09-15 Philips Nv DEVICE FOR DISPLAYING IMAGES CONTAINING A SYSTEM IN ROWS AND COLUMNS GAS DISCHARGE CELLS.
JPS5052967A (en) * 1973-09-10 1975-05-10
US3886390A (en) * 1974-08-29 1975-05-27 Burroughs Corp Buttable, gaseous discharge, display panel including electrodes providing a dot matrix display
US3938135A (en) * 1974-11-27 1976-02-10 Zenith Radio Corporation Gas discharge display device and an improved cell therefor
DE2656621C3 (en) * 1976-12-14 1980-08-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Image display device having a gas discharge path and an electron accelerating path

Also Published As

Publication number Publication date
EP0022892A1 (en) 1981-01-28
DE2929098A1 (en) 1981-02-05
DE3063225D1 (en) 1983-07-07
JPS5618351A (en) 1981-02-21

Similar Documents

Publication Publication Date Title
DE60214480T2 (en) Plasma scoreboard
DE3852775T2 (en) AC plasma display device.
DE2418199C2 (en) Color display arrangement
DE69008947T2 (en) Integrated flat TFEL panel surface and multiple light source producing edge beam structure.
EP0097304A2 (en) Flat electron beam tube with a gas discharge as an electron source
EP0022892B1 (en) Image display device
DE2656621C3 (en) Image display device having a gas discharge path and an electron accelerating path
DE2926393C2 (en) Gas discharge indicator
DE3309659C2 (en)
DE2825902A1 (en) FLAT DISPLAY DEVICE
DE2736916A1 (en) ELECTRON MULTIPLE WITH BEAM ARRANGEMENT
DE3883931T2 (en) Playback arrangement.
DE2744532A1 (en) ELECTRON MULTIPLE WITH FILTER FOR HIGH ENERGY ELECTRONS
DE2139868A1 (en) Electron beam scanner with high contrast rendition
EP0022894A1 (en) Image display device
DE1589580A1 (en) Image converter tubes with improved arrangement of the output structure
EP0022893A1 (en) Image display device
DE3031817C2 (en) Direct view cathode ray storage tube with two-color information display using the copy process
DE919353C (en) Cathode ray tubes for reproducing multicolored television pictures
DE2447537A1 (en) Flat D.C. discharge operated display - has two insulating plates sandwiching parallel cathodes in auxiliary discharge chambers
DE1489172C3 (en) Image converter or image intensifier with an electron multiplication plate
DE950223C (en) Arrangement for the detection or measurement of rays that are difficult or impossible to deflect by an electric field
CH356850A (en) Solid-state image intensifier with a luminous layer and photosensitive elements
DE3035988A1 (en) Planar colour TV screen - has cold cathode with cellular emission at crossing point and column control matrix
DE2209533A1 (en) Light amplifier

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB NL

17P Request for examination filed

Effective date: 19801201

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE FR GB NL

REF Corresponds to:

Ref document number: 3063225

Country of ref document: DE

Date of ref document: 19830707

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19840229

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840329

Year of fee payment: 5

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19850228

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19851101

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19860901

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19871030

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118