EP0097304B1 - Tube de faisceau d'électrons plat avec décharge dans les gaz pour source d'électrons - Google Patents

Tube de faisceau d'électrons plat avec décharge dans les gaz pour source d'électrons Download PDF

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Publication number
EP0097304B1
EP0097304B1 EP83105788A EP83105788A EP0097304B1 EP 0097304 B1 EP0097304 B1 EP 0097304B1 EP 83105788 A EP83105788 A EP 83105788A EP 83105788 A EP83105788 A EP 83105788A EP 0097304 B1 EP0097304 B1 EP 0097304B1
Authority
EP
European Patent Office
Prior art keywords
electron
conductors
gas discharge
row
openings
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
EP83105788A
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German (de)
English (en)
Other versions
EP0097304A2 (fr
EP0097304A3 (en
Inventor
Werner Dr. Rer. Nat. Veith
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
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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
Priority to AT83105788T priority Critical patent/ATE26504T1/de
Publication of EP0097304A2 publication Critical patent/EP0097304A2/fr
Publication of EP0097304A3 publication Critical patent/EP0097304A3/de
Application granted granted Critical
Publication of EP0097304B1 publication Critical patent/EP0097304B1/fr
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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 a flat electron beam tube according to the preamble of claim 1.
  • a flat electron beam tube flat screen
  • This flat screen is already so far developed today that it delivers (color) television pictures in the laboratory with perfectly acceptable optical qualities. If you have not progressed significantly beyond the laboratory stage, this is mainly due to some plasma-related problems, against which you have not yet found a simple and safe-working remedy.
  • the object of the invention is to modify a flat electron beam tube of the type mentioned at the outset in such a way that it becomes puncture-resistant, no longer has an annoying background light and is thereby produced efficiently can be, even if the representation should have a high resolution.
  • a control disc designed according to the invention appears opaque in plan view, since the openings on one side of the disc are covered by webs on the other side of the disc; it is accordingly clear that this disk does not pass ultraviolet or visible radiation from the plasma at any point.
  • the decoupling achieved with the concealed control disc is so good that considerable freedom has been regained in the selection of the gas mixture and the gas pressure as well as in the design of the cathode. It is also favorable that the electron beams entering the post-acceleration space are already bundled very well, so that a simple refocusing is necessary at most in order to unite associated sub-bundles again into a single beam with a small cross-section. In addition, the line openings can be enlarged and thus the electron yield can be increased without having to accept dangerous voltage penetrations.
  • the flat electron beam tube proposed here has a control characteristic that, particularly if you want to generate the gray levels by pulse-length modulation, makes it much easier to maintain uniform image brightness everywhere: the screen current flows into the control voltage a practically constant plateau over wide voltage ranges.
  • the electron entry and exit openings are normally holes in the row or column conductors; such an embodiment is shown for example in the figure of DE-PS 24 12 869. Under certain circumstances, it may be more appropriate to depart from this version and to move the openings on the row conductor side or the column conductor side into the spaces between adjacent conductors.
  • a control structure in which hole-free row conductors (ribbons, wires) alternate with electron entry gaps of approximately the same width has an additional advantage: The electrons, which are drawn from the plasma and fly past the left and right of the keyed row conductor, become - in the control room - through transverse fields in the entry gaps combined into a line-parallel beam.
  • an electron-optical cylindrical lens should be assigned to each column conductor.
  • Such a lens which on the one hand takes care of the refocusing and on the other hand shields the individual column conductors from one another, can be implemented in individual cases by one or two column-parallel conductor tracks per column conductor.
  • a control disk in which the column-side and the row-side openings are not in alignment with one another and are formed in the manner of a slot, is already known from DE-A-30 10 179.
  • This proposal which is only aimed at making production easier, is based on the fact that the holes overlap at least partially, so that the harmful effects between the two spaces are basically not dampened at all.
  • a gas-filled envelope 1 contains in particular a gas-filled envelope 1 with a rear panel 2 and a front panel 3 and a control disc 4. All three panels lie in mutually parallel planes, the control disc 4 dividing the interior of the envelope into two rooms, a front post-acceleration chamber 5 and a rear gas discharge space 6.
  • the back plate 2 is provided on its front side with a family of parallel, relatively large-area cathode strips 7.
  • the front plate 3 carries on its back a regular grid of phosphor points 8, which can be excited by electrons to emit light, and above it a post-acceleration anode 9.
  • the control disk 4, which is supported against the front plate 3 by a spacer frame 10, contains one on the back Family of row conductors 11 which are parallel to one another and column conductors 12 on their front side.
  • the row conductors run parallel to the cathode strips 7 and the column conductors extend perpendicularly thereto. Openings - electron entry openings 13 in the row conductors 11 and electron exit openings 14 in the column conductors 12 - are introduced into each of the conductors 11, 12.
  • the following voltages are present on the individual electrodes: -200V or 0V on the selected and unselected cathode strips; on the controlled and uncontrolled row conductors 0V or -50V; on the column conductors 12 between -80V and -30V; and at the post-acceleration anode + 4kV.
  • the electrode matrix is addressed line sequentially, and the cathode voltages are synchronized with the line scanning voltage such that the plasma burns between the selected line conductor and the cathode strip just opposite. Further details of this control principle can be found in DE-OS 26 43 915. For the rest, reference is made to the already cited DE-PS 24 12 869, which among other things. also deals extensively with questions of the constructive structure.
  • the control disk 4 acts in a viewing direction perpendicular to the disk extension like an opaque disk, since its openings on one side are covered by solid panels on the other side.
  • Fig. 2 essentially only the conductor part of the entire control disk 4 is shown; of the structure carrying the conductors and consisting of insulating material, only column supports 25, which close the gaps between the column conductors, are indicated.
  • Such a concealment occurs , if you choose the following dimensions: the row conductors 11 are 3401lm wide and 60 ⁇ m apart.
  • the electron inlet openings 13 are rectangles having an area of 220 x 200um - the narrow sides extend parallel to the row conductor extension - and in each case 200 l lm apart from each other.
  • the column conductors are 340 1 wide, also keep a distance of 60 ⁇ m from each other and have slot-shaped electron exit openings 14. These slots, which run parallel to the column conductor extension, are 300 ⁇ m long, 801 ⁇ m wide and each placed behind one of the row conductor webs that remain between adjacent electron entry openings.
  • the control disk 4 which is shown in FIG. 1 for the sake of simplicity as an unstructured block, is to be designed in practice in such a way that on the one hand it can act as a stable support for the row and column conductors and on the other hand contains openings which each other connect the associated electron openings.
  • the production of such a support structure does not pose any fundamental difficulties in practice since it is possible to use techniques which have already been developed for control disks with straight openings. For example, one could first form the row and column conductors on a thin glass film and then etch the glass through the conductor openings down to relatively small-area connection points between the two groups of conductors.
  • a second possibility is to first implement the row and column conductors on separate support systems and then to put these units together in the correct position.
  • the support systems will contain mutually parallel insulating webs, each of which is positioned between two adjacent conductors and possibly completed by a few cross struts to form a self-supporting structure.
  • FIG. 2 shows the potential relationships in the region of the electrode matrix, specifically in the event that the row conductor is selected and the column conductors are at pass potential. If you select the row conductor voltage as the reference potential, the column conductors are at -30V. If one also adds the influences from the gas discharge space on the one hand and the post-acceleration space on the other hand, a potential distribution results, of which some characteristic equipotential surfaces are drawn in the diagram and provided with the associated potential values. Two saddle points of -5V can be seen, one approximately in the center of the electron beam entry opening and another above the electron beam exit opening.
  • the saddle point on the line conductor side acts, which is a more positive one Potential as the potential surface producing it, for electron scattering and for ion collecting, while the saddle point above the gap opening, which is formed by a potential surface with a more positive potential, collects the electrons and scatter the ions.
  • These two lens effects change the trajectories of the charge carriers entering the control chamber in a characteristic manner.
  • representative trajectories of electrons curves 15, 16 and 17
  • ions curves 18 and 19
  • Curves 15 and 16 belong to slow electrons from the gas discharge, curve 17 denotes the path of a fast plasma electron and curves 18 and 19 describe the paths of a fast or decelerated ion from the post-acceleration space. It can be seen that the low-energy electrons are drawn through the control chamber on a curved path and enter the post-acceleration chamber as a relatively well focused beam. The slow ions are first scattered and then - under the influence of a constantly moving field - transported to the inside of the column conductors. The fast electrons and ions are only slightly deflected by the relatively weak fields; they hit the parts of the control structure that act as panels and are largely made harmless.
  • the invention is of course not limited to the illustrated embodiment. So there is still considerable design freedom, especially in the construction of the control disk, since it is essentially only a question of placing the openings on both sides of the control disk “on a gap” with one another.
  • the openings of the even-numbered row conductors could be offset from the openings of the odd-numbered row conductors and the column conductors could be made correspondingly zigzag (see also DE-A-26 15 569).

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Lasers (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Claims (7)

1. Tube à faisceau électronique plat ayant les particularités suivantes:
a) une enveloppe remplie de gaz contient deux plaques parallèles placées l'une derrière l'autre dans le sens de l'observation, une plaque frontale et une plaque arrière;
b) l'intérieur de l'enveloppe est partagé par un disque de commande, s'étendant parallèlement aux plans des plaques, en une chambre avant, formant un espace de post-accélération, et une chambre arrière, formant l'espace à décharge gazeuse;
c) la plaque arrière porte, sur sa face interne, au moins une cathode, formant la cathode pour la décharge gazeuse;
d) la plaque frontale porte, sur sa face interne, une couche luminescente susceptible d'être excitée par des electrons et une anode, formant l'anode de postaccélération;
e) le disque de commande porte, sur sa face tournée vers l'espace à décharge gazeuse, un premier ensemble de conducteurs parallèles en forme de rubans, constituant des conducteurs de lignes, ainsi qu'une première série d'ouvertures disposées régulièrement et représentant des orifices d'entrée d'électrons et, sur sa face tournée vers l'espace de post-accélération, une deuxième série de conducteurs parallèles en forme de rubans, constituant des conducteurs de colonnes, ainsi qu'une deuxième série d'ouvertures disposées régulièrement et représentant des orifices de sortie d'électrons, les conducteurs de colonnes étant croisés par rapport aux conducteurs de lignes et les orifices de sortie d'électrons étant coordonnés, au moyen de percées dans le disque de commande, à des orifices d'entrée d'électrons déterminés;
f) les conducteurs de lignes peuvent être attaqués l'un après l'autre, c'est-à-dire peuvent être mis à un potentiel plus positif tel, par rapport au potentiel de la cathode ou des cathodes pour la décharge gazeuse, qu'une décharge gazeuse fournissant des électrons s'établit entre le conducteur de ligne et la cathode de décharge gazeuse située en face de lui;
g) pendant le temps où un conducteur de ligne déterminé est attaqué, les conducteurs de colonnes peuvent être soumis aux tensions correspondantes du signal;
h) l'anode de post-accélération peut être mise à un potentiel si élevé que les électrons qui parviennent de la décharge gazeuse dans l'espace de post-accélération sont accélérés à quelques kV et frappent finalement l'écran à luminescence;
caractérisé en ce que
i) des orifices d'entrée d'électrons (13) et des orifices de sortie d'électrons (14) mutuellement coordonnés ne chevauchent pas lorsqu'on les observe dans une direction perpendiculaire au plan du disque de commande et
k) les conducteurs de colonnes (12) peuvent être mis à un potentiel tellement plus négatif que le conducteur de ligne (11) attaqué que les électrons à l'intérieur du disque de commande (4) sont déviés à tel point qu'ils parviennent dans le champ d'accélération passant à travers les orifices de sortie d'électrons (14) et sont de ce fait tirés globalement suivant un trajet courbe dans l'espace de post-accélération (5).
2. Tube selon la revendication 1, caractérisé en ce que les orifices d'entrée d'électrons (13) sont formés par des trous dans les conducteurs de lignes (11) et les orifices de sortie d'électrons (14) sont formés par des trous dans les conducteurs de colonnes (12) et en ce que les orifices de sortie d'électrons (14) sont décalés, par rapport aux orifices d'entrée d'électrons (13) auxquels ils sont coordonnés, dans le sens de l'étendue des conducteurs de lignes.
3. Tube selon la revendication 2, caractérisé en ce que les orifices de sortie d'électrons (14) possèdent la forme de fentes qui s'étendent perpendiculairement à la direction de décalage.
4. Tube selon la revendication 1, caractérisé en ce que les orifices d'entrée d'électrons (13) sont formés par des fentes oblongues entre des conducteurs de lignes (11) voisins et en ce que les orifices de sortie d'électrons (14) sont décalés, par rapport aux orifices d'entrée d'électrons (13) auxquels ils sont coordonnés, en direction de l'étendue des conducteurs de colonnes.
5. Tube selon la revendication 1, caractérisé en ce que les orifices de sortie d'électrons (14) sont formés par des fentes oblongues entre des conducteurs de colonnes (12) voisins et que les orifices d'entrée d'électrons (13) sont décalés, dans le sens de l'étendue des conducteurs de lignes, par rapport aux orifices de sortie d'électrons (14) auxquels ils sont coordonnés.
6. Tube selon une des revendications 1 à 5, caractérisé en ce qu'il comprend, dans la zone du côté tourné vers l'espace de post-accélération (5) du disque de commande (4), un système d'électrodes (électrodes de focalisation) qui présentent un potentiel négatif par rapport au potentiel du conducteur de colonne (12) correspondant et qui, à la façon d'une lentille cylindrique opto-électronique, rassemble en un faisceau les électrons pénétrant dans l'espace de post-accélération (5).
7. Tube selon la revendication 6, caractérisé en ce qu'une électrode de focalisation, ou deux électrodes de focalisation, également en forme de rubans et s'étendant parallèlement à lui, est coordonnée ou sont coordonnées à chaque conducteur de colonne (12).
EP83105788A 1982-06-18 1983-06-13 Tube de faisceau d'électrons plat avec décharge dans les gaz pour source d'électrons Expired EP0097304B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83105788T ATE26504T1 (de) 1982-06-18 1983-06-13 Flache elektronenstrahlroehre mit einer gasentladung als elektronenquelle.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823222850 DE3222850A1 (de) 1982-06-18 1982-06-18 Flache elektronenstrahlroehre mit einer gasentladung als elektronenquelle
DE3222850 1982-06-18

Publications (3)

Publication Number Publication Date
EP0097304A2 EP0097304A2 (fr) 1984-01-04
EP0097304A3 EP0097304A3 (en) 1984-10-17
EP0097304B1 true EP0097304B1 (fr) 1987-04-08

Family

ID=6166311

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Application Number Title Priority Date Filing Date
EP83105788A Expired EP0097304B1 (fr) 1982-06-18 1983-06-13 Tube de faisceau d'électrons plat avec décharge dans les gaz pour source d'électrons

Country Status (5)

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US (1) US4564790A (fr)
EP (1) EP0097304B1 (fr)
JP (1) JPS598250A (fr)
AT (1) ATE26504T1 (fr)
DE (2) DE3222850A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3228183C2 (de) * 1982-07-28 1984-08-30 Siemens AG, 1000 Berlin und 8000 München Flache Elektronenstrahlröhre und Verfahren zu ihrer Herstellung
DE3406252A1 (de) * 1984-02-21 1985-08-22 Siemens AG, 1000 Berlin und 8000 München Flache gasentladungsanzeigevorrichtung
EP0167930A1 (fr) * 1984-07-02 1986-01-15 Nokia Graetz Gesellschaft mit beschränkter Haftung Dispositif de contrôle d'électrons pour appareils d'affichage à décharge à gaz
US4719388A (en) * 1985-08-13 1988-01-12 Source Technology Corporation Flat electron control device utilizing a uniform space-charge cloud of free electrons as a virtual cathode
DE3911346A1 (de) * 1989-04-07 1990-10-11 Nokia Unterhaltungselektronik Steuersystem fuer flache bildwiedergabevorrichtungen
DE3911343A1 (de) * 1989-04-07 1990-10-11 Nokia Unterhaltungselektronik Flache anzeigeeinrichtung
US5256937A (en) * 1989-04-07 1993-10-26 Nokia (Deutschland) Gmbh Flat panel fluorescent screen display tube
US5386175A (en) * 1990-05-24 1995-01-31 U.S. Philips Corporation Thin-type picture display device
US5424605A (en) * 1992-04-10 1995-06-13 Silicon Video Corporation Self supporting flat video display
US5477105A (en) * 1992-04-10 1995-12-19 Silicon Video Corporation Structure of light-emitting device with raised black matrix for use in optical devices such as flat-panel cathode-ray tubes
US5686790A (en) * 1993-06-22 1997-11-11 Candescent Technologies Corporation Flat panel device with ceramic backplate
US5407210A (en) * 1993-11-15 1995-04-18 Canning; Robert P. Portable game apparatus for playing curb ball or other ball game

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845241A (en) * 1973-02-02 1974-10-29 Zenith Radio Corp Television display panel having gas discharge cathodo-luminescent elements
DE2412869C3 (de) * 1974-03-18 1980-10-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anzeigevorrichtung mit einem Gasentladungsraum als Elektronenquelle, mit einem Elektronennachbeschleunigungsraum und mit einem Leuchtschirm und Verfahren zum Betrieb dieser Anzeigevorrichtung
DE2615569C3 (de) * 1976-04-09 1982-01-14 Siemens AG, 1000 Berlin und 8000 München Farbbildwiedergabevorrichtung
DE2643915C2 (de) * 1976-09-29 1983-10-06 Siemens Ag, 1000 Berlin Und 8000 Muenchen Anzeigevorrichtung
DE2656621C3 (de) * 1976-12-14 1980-08-14 Siemens Ag, 1000 Berlin Und 8000 Muenchen Bildanzeigevorrichtung mit einer Gasentladungsstrecke und einer Elektronenbeschleunigungsstrecke
US4236096A (en) * 1976-12-14 1980-11-25 Siemens Aktiengesellschaft Plasma image display device
DE2855056C2 (de) * 1978-12-20 1982-04-15 Siemens AG, 1000 Berlin und 8000 München Gasentladungsanzeigevorrichtung
DE2926393C2 (de) * 1979-06-29 1982-10-07 Siemens AG, 1000 Berlin und 8000 München Gasentladungsanzeigevorrichtung
DE3010179A1 (de) * 1980-03-17 1981-09-24 Siemens AG, 1000 Berlin und 8000 München Steuerscheibe fuer einen flachen plasmabildschirm
US4376258A (en) * 1981-04-16 1983-03-08 Rca Corporation Shielded beam guide structure for a flat panel display device and method of making same

Also Published As

Publication number Publication date
US4564790A (en) 1986-01-14
JPS598250A (ja) 1984-01-17
DE3370896D1 (en) 1987-05-14
ATE26504T1 (de) 1987-04-15
DE3222850A1 (de) 1983-12-22
EP0097304A2 (fr) 1984-01-04
EP0097304A3 (en) 1984-10-17

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