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EP0013365B1 - Pièce d'écartement dans un dispositif d'affichage à décharge à gaz - Google Patents

Pièce d'écartement dans un dispositif d'affichage à décharge à gaz Download PDF

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Publication number
EP0013365B1
EP0013365B1 EP79105077A EP79105077A EP0013365B1 EP 0013365 B1 EP0013365 B1 EP 0013365B1 EP 79105077 A EP79105077 A EP 79105077A EP 79105077 A EP79105077 A EP 79105077A EP 0013365 B1 EP0013365 B1 EP 0013365B1
Authority
EP
European Patent Office
Prior art keywords
glass
fluorescent screen
metal layers
holes
perforated plate
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
EP79105077A
Other languages
German (de)
English (en)
Other versions
EP0013365A1 (fr
Inventor
Wilhelm Huber
Peter Mammach
Kaspar Dr. Rer. Nat. Weingand
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
Priority to AT79105077T priority Critical patent/ATE3738T1/de
Publication of EP0013365A1 publication Critical patent/EP0013365A1/fr
Application granted granted Critical
Publication of EP0013365B1 publication Critical patent/EP0013365B1/fr
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to a spacer in a gas discharge display device, in which glass elements are arranged between a control perforated plate and a fluorescent screen.
  • Another proposal (DE patent application P 2 802 976.7) is based on an advantageous production method for perforated plates and provides for several thin glass plates which are arranged one on top of the other.
  • the holes are made by etching.
  • the thin glass plates are individually etched so that the inevitable side undercuts remain low. H. it is ensured that the individual etching process only has to create a small depth.
  • the resulting lateral undercut is relatively large for the individual deep etching, but not in relation to the entire depth of the holes lying one above the other. In view of the high tolerance requirements, this is a great advantage.
  • the distance to be observed is of the order of 1 mm and thus also the thickness of the spacer and the depth of the holes in it.
  • the web thickness between the holes should not exceed 0.1 mm, because on the one hand the holes must be sufficiently large, but on the other hand there must be a sufficient number. There must be one hole per pixel (the total number consists of 625 lines x 1500 columns), and all holes must be evenly spaced from each other.
  • the entire so-called post-acceleration space between the control perforated plate and the fluorescent screen is filled with a glass body except for the holes provided for the continuous electron tracks.
  • the distance can thus be reliably maintained over the entire fluorescent screen area.
  • the relatively narrow holes in the insulator body cause problems with the field distribution.
  • the perforated walls and the glass can become statically charged both from scattered primary electrons and from secondary electrons from the fluorescent screen. Inhomogeneities arise within the electrical field between the control perforated plate and the (post-acceleration) anode lying on the fluorescent screen, which in extreme cases can prevent the electrons from getting to the fluorescent screen. This is all the more so since the acceleration voltages cannot be very high with the flat design and the electrons are therefore low-energy.
  • the present invention is based on the object of designing the already proposed spacing in such a way that not only the mechanical-geometric function of the spacing, but also the electronic requirements are met and in particular a homogenized potential distribution is achieved.
  • a spacer with the features of the preamble and features a to d of the spacer according to the invention is known from EP application 0 003 276, which has not been published beforehand.
  • the present invention achieves a homogenized potential distribution.
  • a gas discharge display combines the advantage of the exact spacing between the control perforated plate and the fluorescent screen with the advantage of reliable electrical electron beam guidance.
  • the electrical field between the control perforated plate and the anode is kept stable by interposing potential areas.
  • a single layer of metal improves the homogeneity of the field.
  • metal layers result from the fact that etch-resistant metal layers, which serve to cover the webs between the holes during the etching of the glass foils, remain on the glass foils, but are at least removed on the glass foil surface lying against the control perforated plate.
  • the metal layers are kept at floating potentials.
  • Another advantage is with regard to a homogenized potential distribution, since the walls of the glass foil holes are provided with a resistance layer. This is advantageously applied by tempering the glass in a suitable metal salt vapor.
  • the glass of the control perforated plate, the glass foils and the fluorescent screen are made of the same material and have at least the same coefficient of thermal expansion. This not only has a favorable effect on the necessary glass-glass connections, i.e. thermal cracks are not to be feared, but because of the stability of the geometry also on the stability of the electrical conditions. This applies both to a configuration of the spacer, according to which the glass foils are held in the correct position with respect to one another by means of positioning pins, and also to the configuration, according to which the glass foils extend laterally beyond the active image area and serve as a vacuum-sealed connection element between the control perforated plate and the fluorescent screen.
  • the thermal stability also exists if, for example, sunlight on the front causes one-sided heating.
  • the largely coherent and relatively uniform glass body of the actual image-forming part of the device - control perforated plate, spacer and fluorescent screen - provides for a balancing heat conduction.
  • the fluorescent screen of a plasma display is designated by 1 in FIG. 1.
  • a luminescent layer 11 in the form of luminous dots and an anode layer 12 on top of it the row and column control arranged as described in DE-OS 2 412 869.
  • a metal layer 7 lies between the glass foils 2 and 3, and a metal layer 8 between the glass foils 3 and 4.
  • the left half of FIG. 1 shows an embodiment where the glass foils 2, 3, 4 and the control perforated plate 5 are held by means of positioning pin 10. After the execution of the right half, the glass foils 2, 3, 4 and the control perforated plate 5 are brought out and fused to the edge with the flange 6 and with the fluorescent screen 1.
  • the flange-shaped thickened edge 6 of the rear part of the plasma display sits on the edge of the control perforated plate 5.
  • the spacer according to the invention lies between the fluorescent screen 1 and the control perforated plate 5. It consists of the three stacked glass foils 2, 3 and 4 and the metallic intermediate layers 7 and 8; at the hole locations of the control perforated plate 5, they have continuous aligned holes. An example of the shape of the holes is shown in FIG. 2.
  • the holes in the control perforated plate 5 and in the glass foils 2, 3, 4 are created by etching.
  • the removal of glass material by etching holes at certain points always requires certain ratios of the size and distance of the holes from one another to the depth, i.e. with through holes to the glass thickness. These conditions determine the inevitable lateral undercut and thus the possible number of holes as well as the mechanical stability of the entire arrangement with regard to the webs remaining between the holes.
  • the lateral undercut is reduced to a tolerable level.
  • the glass foils 2, 3, 4 are individually etched using the same etching mask as the control perforated plate 5. This ensures that the holes are precisely aligned after assembly.
  • a hole is shown as an embodiment where the walls in the glass foils 2, 3 and 4 are covered with a resistance layer 9. Local charging of the perforated walls is completely avoided here. The field's homogeneity is further improved.
  • the invention relates to a spacer in a gas discharge display device, in which glass elements are arranged between a control perforated plate and a fluorescent screen.
  • Another proposal (DE patent application P 2 802 976.7) is based on an advantageous production method for perforated plates and provides for several thin glass plates which are arranged one on top of the other.
  • the holes are made by etching. So that the inevitable side undercuts remain low, the thin glass plates are etched individually, i.e. it is ensured that the individual etching process only has to create a small depth.
  • the resulting lateral undercut is relatively large for the individual deep etching, but not in relation to the entire depth of the holes lying one above the other. In view of the high tolerance requirements, this is a great advantage.
  • the distance to be observed is of the order of 1 mm and thus also the thickness of the spacer and the depth of the holes in it.
  • the web thickness between the holes should not exceed 0.1 mm, because on the one hand the holes must be sufficiently large, but on the other hand there must be a sufficient number. There must be one hole per pixel (the total number consists of 625 lines x 1500 columns), and all holes must be evenly spaced from each other.
  • the entire so-called post-acceleration space between the control perforated plate and the fluorescent screen is filled with a glass body except for the holes provided for the continuous electron paths.
  • the distance can thus be reliably maintained over the entire fluorescent screen area.
  • the relatively narrow holes in the insulator body cause problems with the field distribution.
  • the perforated walls and the glass can become statically charged both from scattered primary electrons and from secondary electrons from the fluorescent screen. Inhomogeneities arise within the electrical field between the control perforated plate and the (post-acceleration) anode lying on the fluorescent screen, which in extreme cases can prevent the electrons from getting to the fluorescent screen. This is all the more so since the acceleration voltages cannot be very high in the case of the flat design and the electrons are therefore low-energy.
  • the present invention is based on the object of designing the already proposed spacer in such a way that not only the mechanical-geometric function of the spacing, but also the electronic requirements are met.
  • Such a gas discharge display combines the advantage of the exact spacing between the control perforated plate and the fluorescent screen with the advantage of reliable electrical electron beam guidance.
  • the electric field between the control perforated plate and the anode is determined by intermediate switching of potential areas kept stable.
  • a single layer of metal improves the homogeneity of the field.
  • the advantages of film construction come into their own, because such a metal layer can be used for the potential distribution between each pair of glass films.
  • metal layers result from the fact that etch-resistant metal layers, which serve to cover the webs between the holes during the etching of the glass foils, remain on the glass foils, but are at least removed on the glass foil surface lying against the control perforated plate.
  • the metal layers are kept at floating potentials.
  • a further improvement with regard to a homogenized potential distribution is achieved if the walls of the glass foil holes are provided with a resistance coating. This is done, for example, by tempering the glass in a suitable metal salt vapor.
  • the glass of the control perforated plate, the glass foils and the fluorescent screen are made of the same material and have at least the same coefficient of thermal expansion. This not only has a favorable effect on the necessary glass-glass connections, i.e. thermally induced cracks are not to be feared, but because of the stability of the geometry also on the stability of the electrical conditions. This applies both to a configuration of the spacer, according to which the glass foils are held in the correct position with respect to one another by means of positioning pins, and also to the configuration, according to which the glass foils extend laterally beyond the active image area and serve as a vacuum-sealed connection element between the control perforated plate and the fluorescent screen.
  • the thermal stability also exists if, for example, sunlight on the front causes one-sided heating.
  • the largely coherent and relatively uniform glass body of the actual part of the image-forming device - control perforated plate, spacer and fluorescent screen - ensures a balancing heat conduction in itself.
  • the fluorescent screen of a plasma display is designated by 1 in FIG. 1.
  • a luminescent layer 11 in the form of luminous dots and an anode layer 12 on top of it the row and column control arranged as described in DE-OS 2 412 869.
  • a metal layer 7 lies between the glass foils 2 and 3
  • a metal layer 8 lies between the glass foils 3 and 4.
  • the left half of FIG. 1 shows an embodiment where the glass foils 2, 3, 4 and the control perforated plate 5 are held by means of positioning pins 10. After the execution of the right half, the glass foils 2, 3, 4 and the control perforated plate 5 are brought out and fused to the edge with the flange 6 and with the fluorescent screen 1.
  • the flange-shaped thickened edge 6 of the rear part of the plasma display sits on the edge of the control perforated plate 5.
  • the spacer according to the invention lies between the fluorescent screen 1 and the control perforated plate 5. It consists of the three stacked glass foils 2, 3 and 4 and the metallic intermediate layers 7 and 8; at the hole locations of the control perforated plate 5, they have continuous aligned holes. An example of the shape of the holes is shown in FIG. 2.
  • the holes in the control perforated plate 5 and in the glass foils 2, 3, 4 are created by etching.
  • the removal of glass material by etching holes at certain points always requires certain ratios of the size and spacing of the holes from one another to the depth, ie in the case of continuous holes to the glass thickness. These conditions determine the inevitable lateral undercut and thus the possible number of holes as well as the mechanical stability of the entire arrangement with regard to the webs remaining between the holes.
  • three superimposed glass sheets 2, 3, 4 having a thickness in the order of magnitude of the thickness of the control orifice plate 5 approximately 1/3 mm lateral undercutting is reduced to a tolerable level.
  • the glass foils 2, 3, 4 are etched individually using the same etching mask as the control perforated plate 5. This ensures that the holes are precisely aligned after assembly.
  • a metal layer resistant to the glass etchant is applied to the glass plate or film to be etched, and a photoresist layer thereon.
  • the photoresist layer is exposed at the locations to be etched via the common etching mask and the metal is removed there with an appropriate etching agent.
  • the remaining metal layer covers the glass webs that are to remain.
  • the metal layers can remain on the glass foils 2, 3, 4 with the exception of the metal layer which adjoins the control perforated plate 5. There, the metal layer on the control electrode tracks 14 could cause short circuits or at least field distortions.
  • the metal layers 7, 8 homogenize the potential gradient in the acceleration space.
  • the metal layer remaining on the glass foil 2 and facing the anode layer 12 has no further effect.
  • a hole is also shown as an embodiment where the walls in the glass foils 2, 3 and 4 are covered with a resistance layer 9. Local charging of the perforated walls is completely avoided here. The homogeneity of the field has been further improved.

Landscapes

  • Gas-Filled Discharge Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Claims (6)

1. Pièce d'entretoisement dans un dispositif d'affichage par décharge dans un gaz, dans laquelle des éléments en verre sont interposés entre une plaque perforée de commande et un écran luminescent, caractérisée par les dispositions suivantes:
a) plusieurs éléments en verre agencés en feuilles de verre (2, 3, 4) sont empilés l'un sur l'autre entre la plaque perforée de commande (5) munie de pistes formant électrodes (13, 14) et l'écran luminescent (1) et emplissent, éventuellement avec des couches métalliques (7, 8) interposées entre eux, tout l'espace intermédiaire;
b) les feuilles de verre (2, 3, 4), tout comme les couches métalliques (7, 8), sont perforées du même réseau de perforations que la plaque perforée de commande (5); les perforations sont alignées les unes par rapport aux autres de manière à former des trajets continus vers les points images de l'écran luminescent;
c) au moins l'une des couches métalliques (7, 8) se trouve entre deux feuilles de verre (2, 3, 4) superposées;
d) les couches métalliques (7, 8) sont des couches métalliques résistantes à l'attaque chimique qui ont servi, lors de l'attaque chimique des feuilles de verre (2, 3, 4), à recouvrir les parties pleines entre les perforations;
e) les parois des perforations des feuilles de verre (2, 3, 4) sont munies d'une couche résistive (9).
2. Pièce d'entretoisement selon la revendication 1, caractérisée en ce que les feuilles de verre (2, 3, 4) débordent latéralement de la surface active de formation d'images et servent d'élément de liaison fondu étanche au vide entre la plaque perforée de commande (5) et l'écran luminescent (1).
3. Pièce d'entretoisement selon la revendication 1, caractérisée en ce que les feuilles de verre (2,3,4) sont maintenues en la position correcte les unes par rapport aux autres par des broches de positionnement (10).
4. Pièce d'entretoisement selon l'une des revendications 2 ou 3, caractérisée en ce que le verre de la plaque perforée de commande (5), des feuilles de verre (2, 3, 4) et de l'écran luminescent (1) est constitué du même matériau ou du moins a les mêmes coefficients de dilatation thermique.
EP79105077A 1978-12-20 1979-12-10 Pièce d'écartement dans un dispositif d'affichage à décharge à gaz Expired EP0013365B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79105077T ATE3738T1 (de) 1978-12-20 1979-12-10 Abstandshalterung in einer gasentladungsanzeigevorrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782855108 DE2855108A1 (de) 1978-12-20 1978-12-20 Abstandshalterung in einer gasentladungsanzeigevorrichtung
DE2855108 1978-12-20

Publications (2)

Publication Number Publication Date
EP0013365A1 EP0013365A1 (fr) 1980-07-23
EP0013365B1 true EP0013365B1 (fr) 1983-06-08

Family

ID=6057798

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79105077A Expired EP0013365B1 (fr) 1978-12-20 1979-12-10 Pièce d'écartement dans un dispositif d'affichage à décharge à gaz

Country Status (5)

Country Link
US (1) US4322656A (fr)
EP (1) EP0013365B1 (fr)
JP (1) JPS5588246A (fr)
AT (1) ATE3738T1 (fr)
DE (1) DE2855108A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952601C2 (de) * 1979-12-28 1982-09-02 Siemens AG, 1000 Berlin und 8000 München Gasentladungsanzeigevorrichtung
DE2952528C2 (de) * 1979-12-28 1985-10-10 Siemens AG, 1000 Berlin und 8000 München Gasentladungsanzeigevorrichtung
DE3036671A1 (de) * 1980-09-29 1982-05-13 Siemens AG, 1000 Berlin und 8000 München Flacher bildschirm, verfahren zu seiner herstellung und seine verwendung
DE3445628A1 (de) * 1984-12-14 1986-06-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Flache bildwiedergabevorrichtung
CN1026943C (zh) * 1990-03-06 1994-12-07 杭州大学 平板彩色显示器
US5229691A (en) * 1991-02-25 1993-07-20 Panocorp Display Systems Electronic fluorescent display
US5347201A (en) * 1991-02-25 1994-09-13 Panocorp Display Systems Display device
JP4111298B2 (ja) * 1999-06-29 2008-07-02 株式会社日立プラズマパテントライセンシング プラズマディスプレイパネル
US20110023548A1 (en) * 2009-07-29 2011-02-03 Garner Sean M Glass substrate comprising an edge web portion

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003276A1 (fr) * 1978-01-24 1979-08-08 Siemens Aktiengesellschaft Procédé et appareillage pour la perforation de plaques en verre par attaque chimique, de préférence pour produire des structures fines

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR958354A (fr) * 1947-11-29 1950-03-08
NL282151A (fr) 1960-04-20
US3407331A (en) 1966-04-07 1968-10-22 Gen Electrodynamics Corp Display device
DE1512329A1 (de) * 1966-06-15 1969-08-07 Metro Goldwyn Mayer Inc Matrixanordnung
US3777206A (en) * 1972-03-24 1973-12-04 Sperry Rand Corp Electrodes for gas plasma display panels and method of manufacture thereof
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
DE2615721C2 (de) * 1976-04-09 1982-10-21 Siemens AG, 1000 Berlin und 8000 München Anzeigevorrichtung mit einem Gasentladungsraum als Quelle für Elektronen und einem Nachbeschleunigungsraum zur Nachbeschleunigung dieser Elektronen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003276A1 (fr) * 1978-01-24 1979-08-08 Siemens Aktiengesellschaft Procédé et appareillage pour la perforation de plaques en verre par attaque chimique, de préférence pour produire des structures fines

Also Published As

Publication number Publication date
EP0013365A1 (fr) 1980-07-23
DE2855108A1 (de) 1980-06-26
JPS5588246A (en) 1980-07-03
ATE3738T1 (de) 1983-06-15
US4322656A (en) 1982-03-30

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