EP1517359B1 - Procédé de fabrication d'une lampe à decharge plate avec pièces d'écartement - Google Patents

Procédé de fabrication d'une lampe à decharge plate avec pièces d'écartement Download PDF

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Publication number
EP1517359B1
EP1517359B1 EP04019086A EP04019086A EP1517359B1 EP 1517359 B1 EP1517359 B1 EP 1517359B1 EP 04019086 A EP04019086 A EP 04019086A EP 04019086 A EP04019086 A EP 04019086A EP 1517359 B1 EP1517359 B1 EP 1517359B1
Authority
EP
European Patent Office
Prior art keywords
base plate
spacer
plate
solder
cover 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 - Lifetime
Application number
EP04019086A
Other languages
German (de)
English (en)
Other versions
EP1517359A2 (fr
EP1517359A3 (fr
Inventor
Ahmet Oran
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1517359A2 publication Critical patent/EP1517359A2/fr
Publication of EP1517359A3 publication Critical patent/EP1517359A3/fr
Application granted granted Critical
Publication of EP1517359B1 publication Critical patent/EP1517359B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
    • H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/305—Flat vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/26—Sealing together parts of vessels
    • H01J9/265—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps
    • H01J9/266—Sealing together parts of vessels specially adapted for gas-discharge tubes or lamps specially adapted for gas-discharge lamps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel

Definitions

  • the invention relates to a method for producing a flat discharge lamp, also abbreviated hereafter as a flat lamp.
  • the invention is directed to the production of flat lamps, which are designed for dielectrically impeded discharges, in which therefore at least the electrodes of one polarity are separated by a dielectric layer from the discharge medium in the interior of the discharge vessel.
  • Lamps of this type are also known as dielectric barrier discharge lamps.
  • Such lamps are suitable in addition to general lighting, inter alia, for the backlighting of liquid crystal displays (LCD) as well as for decoration and advertising purposes.
  • LCD liquid crystal displays
  • Flat lamps of the generic type have a discharge vessel, which is formed by a bottom plate, a ceiling plate and a frame arranged therebetween.
  • a discharge vessel which is formed by a bottom plate, a ceiling plate and a frame arranged therebetween.
  • the technology of flat lamps for dielectrically impeded discharges is required as the prior art.
  • the discharge vessel of this flat lamp comprises two mutually parallel plates, a frame and spacers which support the two plates against each other.
  • Each spacer consists of a highly viscous at low temperature and a low-viscosity component.
  • the respective vertical dimension of each spacer is greater than the intended end distance of the two plates.
  • the thus initially kept free circumferential gap-like opening serves as a pump or filling opening of the discharge vessel.
  • the low-viscosity component of each spacer element compensates for possible assembly of the discharge vessel possible local deviations of the distances between the two plates.
  • a disadvantage is the associated with the two-piece spacers high production costs. In addition, it may happen that a spacer, which is a little too short to be clamped between the plates, tilts before joining by the convection current in the joining furnace, thereby scrap.
  • the object of the present invention is to avoid the aforementioned disadvantages and to provide an improved method for the production of flat discharge lamps.
  • a method for producing a flat discharge lamp, in particular a flat dielectric barrier discharge lamp, the discharge vessel having a base plate, a cover plate and a frame and at least one spacer element between base plate and cover plate and filled with a discharge medium is, with the following method steps: Provision of a solder bath, immersing one end of the at least one spacer element in the solder bath, applying the at least one spacer element with the immersed end on the inside of the base plate such that the at least one spacer element (3) by means of the solder paste (5 ) of the Lotbads on the inside of the base plate (6) adheres, characterized in that a plurality of spacer elements (3) are each taken with one end in an order plate (1) and held, are immersed with the other end temporarily in the Lotbad, with the end, which was immersed in the solder bath on the base plate (6) are applied and finally released from the order plate (1).
  • the solder bath consists of a suitable solder paste, in particular a glass solder paste.
  • a suitable solder paste low melting glass solder mixed with a binder, e.g. Lead borosilicate, zinc borate or bismuth based glass solders.
  • the method according to the invention offers, inter alia, the advantage that the spacer elements are already covered by the solder paste, i. adhere to the base plate before the melting of the solder, so that they are secured against falling over in the subsequent manufacturing steps.
  • the solder paste namely forms a thin film in the respective contact area between the spacer and the base plate, so that the spacer elements adhere to the base plate by means of capillary adhesion.
  • a large number of spacer elements for example 288 pieces in a 21.3-inch diagonal lamp-are preferably all immersed in the solder bath in a common process step and then in a further process step on the baseplate applied.
  • a plurality of spacer elements are each taken with one end in an order plate and held, for example, by suction, each with the other end temporarily submerged in the solder bath, then positioned over the base plate and finally triggered from the order plate, for example by blowing, so that Finally, the spacer elements each with the end that dipped into the solder bath was stuck to the base plate.
  • the order plate is provided with corresponding recesses for receiving the spacer elements.
  • the arrangement of the recesses in the order plate must correspond to the intended positions of the spacers on the base plate.
  • the pre-assembled structure is completed before joining in the joining furnace with a cover plate and a surrounding frame, which is arranged between base plate and cover plate. Between the frame and cover plate some Lottabletten are arranged to form a pumping gap. The latter soften upon reaching the joining temperature and close the base plate including the spacer elements, with the frame and the cover plate to the actual discharge vessel of the flat discharge lamp.
  • the pre-assembled structure is oriented in the joining furnace introduced so that the inside of the base plate pointing down and consequently hang the spacers down.
  • spacer elements In principle, different shapes for the spacer elements into consideration, but preferably cylindrical, in particular with a circular cross-section.
  • FIGS. 1a, 1b and 2a-2d show the same features in the figures.
  • the previously required manufacturing steps such as the application of the electrode tracks, the dielectric barrier layer and the phosphor layer will not be discussed in detail here, as they are for the understanding of the invention without meaning (therefore not shown here for simplicity). Incidentally, this is on the already mentioned above font WO 98/43277 directed.
  • FIG. 1a shows, by way of example and roughly schematically, an order plate 1 made of aluminum, with only eight circular depressions 2 for the sake of clarity, for accommodating likewise eight cylindrical spacer elements 3 (see Figure 1b).
  • the order plate with the spacer elements is positioned above the glass base plate of the discharge lamp in such a way that the glass solder wetted ends of the spacer elements are just above the surface of the base plate.
  • the spacer elements are triggered by blowing out of the order plate and pressed onto the base plate.
  • the spacers 3 adhere by means of the glass solder paste 5 on the base plate 6 and can not fall over in the subsequent manufacturing steps.
  • a circumferential frame 7 is applied to the base plate 6 by means of glass solder, two glass solder tablets 8 on each of the four sides of the frame 7 and finally a cover plate 9 made of glass mm high glass solder pellets 8 serve to first create a gap 10 between the frame 7 and cover plate 9.
  • the cover plate 9 coated on its inside with phosphor touches the spacer elements 3 (not visible in FIG. 2c), which is why this phosphor layer can no longer scratch during assembly.
  • the entire preassembled structure is placed in an evacuable joining furnace (not shown).
  • the temperature in the joining furnace is increased so far that the glass solder pellets 8 melt and the Frame 7 with base 6 and cover plate 9 are closed to a gas-tight discharge vessel (see Figure 2d).
  • the preassembled structure can also be reversed, ie introduced with downwardly hanging spacer elements in the joining furnace. This has the advantage that the spacer elements can still align vertically when joining and then provide a flat support surface for the cover plate, since the glass soldering paste melts at the ends of the spacer elements when reaching the bonding temperature.
  • the inventive method has the advantage that the spacer elements in the convection current of the joining furnace due to the adhesion to the base plate by means of glass solder paste can not tip over. This can reduce the rejects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)

Claims (12)

  1. Procédé de fabrication d'une lampe à décharge plate, notamment d'une lampe à décharge plate à barrière diélectrique, dont l'enceinte de décharge a une plaque (6) de base, un cadre (7) et une plaque (9) de recouvrement ainsi qu'au moins un élément (3) d'entretoise entre la plaque (6) de base et la base (9) de recouvrement et est emplie d'un milieu de décharge
    comprenant des stades de procédé suivant :
    • On se procure un bain de brasure en pâte de brasure,
    • On plonge une extrémité du au moins un élément (3) d'entretoise dans le bain de brasure,
    • On applique le au moins un élément (3) d'entretoise par l'extrémité qui a été plongée sur la face intérieure de la plaque (6) de base de façon à ce que le au moins un élément (3) d'entretoise adhère au moyen de la pâte (5) de brasure du bain de brasure à la face intérieure de la plaque (6) de base,
    caractérisé en ce que
    une pluralité d'éléments (3) d'entretoise sont respectivement
    • reçus et maintenus par une extrémité dans une plaque (1) de mise en ordre,
    • plongés par l'autre extrémité temporairement dans le bain de brasure,
    • appliqués par l'extrémité qui a été plongée dans le bain de brasure à la plaque (6) de base et enfin
    • séparés de la plaque (1) de mise en ordre.
  2. Procédé suivant la revendication 1, dans lequel la fixation des éléments (3) d'entretoise dans la plaque (1) de mise en ordre s'effectue par aspiration.
  3. Procédé suivant la revendication 1, dans lequel la séparation des éléments (3) d'entretoise de la plaque (1) de mise en ordre s'effectue par insufflation.
  4. Procédé suivant l'une des revendications précédentes, dans lequel on maintient d'abord ouvert comme ouverture de remplissage au moins un espace (10) intermédiaire entre la plaque (9) de recouvrement et le cadre (7).
  5. Procédé suivant la revendication 4, dans lequel on réalise l'espace (10) intermédiaire en mettant un ou plusieurs comprimés (8) de brasure entre le cadre (7) et la plaque (9) de recouvrement.
  6. Procédé suivant l'une des revendications précédentes, dans lequel l'étendue longitudinale du au moins un élément (3) d'entretoise perpendiculairement à la plaque (6) de base correspond sensiblement à la distance finale entre les faces intérieures de la plaque de base et de la plaque (9) de recouvrement.
  7. Procédé suivant l'une des revendications précédentes, dans lequel la plaque (6) de base ayant le au moins un élément (3) d'entretoise, le cadre (7) et la plaque (9) de recouvrement sont joints dans un four pouvant être mis sous vide en l'enceinte de décharge.
  8. Procédé suivant la revendication 7, dans lequel on emplit le four du milieu de décharge pendant l'opération de jonction.
  9. Procédé suivant la revendication 7 ou 8, dans lequel on introduit la structure prémontée, constituée de la plaque (6) de base ayant le au moins un élément (3) d'entretoise du cadre (7) et de la plaque (9) de recouvrement, de façon orientée dans le four de jonction de manière à ce que la face intérieure de la plaque (6) de base soit tournée vers le bas et en conséquence le au moins un élément (3) d'entretoise pende vers le bas.
  10. Procédé suivant l'une des revendications précédentes, dans lequel l'enceinte de décharge a des électrodes de décharge, qui sont séparées au moins en partie par une couche diélectrique du milieu de décharge à l'intérieur de l'enceinte de décharge.
  11. Procédé suivant la revendication 10, dans lequel les électrodes sont constituées sous la forme de bandes d'électrodes disposées sur la plaque de base de l'enceinte de décharge.
  12. Procédé suivant l'une des revendications précédentes, dans lequel le bain de brasure comprend un bain de brasure à bas point de fusion par exemple en borosilicate de plomb, en borate de zinc ou également une brasure pour du verre à base de bismuth.
EP04019086A 2003-09-17 2004-08-11 Procédé de fabrication d'une lampe à decharge plate avec pièces d'écartement Expired - Lifetime EP1517359B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10343073 2003-09-17
DE10343073A DE10343073A1 (de) 2003-09-17 2003-09-17 Verfahren zur Herstellung einer flachen Entladungslampe mit Abstandselementen

Publications (3)

Publication Number Publication Date
EP1517359A2 EP1517359A2 (fr) 2005-03-23
EP1517359A3 EP1517359A3 (fr) 2006-06-14
EP1517359B1 true EP1517359B1 (fr) 2007-10-10

Family

ID=34177801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04019086A Expired - Lifetime EP1517359B1 (fr) 2003-09-17 2004-08-11 Procédé de fabrication d'une lampe à decharge plate avec pièces d'écartement

Country Status (9)

Country Link
US (1) US20050059312A1 (fr)
EP (1) EP1517359B1 (fr)
JP (1) JP2005100984A (fr)
KR (1) KR100646896B1 (fr)
CN (1) CN1599004A (fr)
AT (1) ATE375601T1 (fr)
CA (1) CA2481289A1 (fr)
DE (2) DE10343073A1 (fr)
TW (1) TWI261859B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005021303A1 (de) * 2005-05-09 2006-11-16 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Herstellung von flachen dielektrisch behinderten Entladungslampen
TW200700840A (en) * 2005-06-28 2007-01-01 Delta Optoelectronics Inc Flat light

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1160700B (it) * 1977-10-25 1987-03-11 Bfg Glassgroup Pannelli
US4666078A (en) * 1982-04-20 1987-05-19 Seiko Epson Kabushiki Kaisha Electroless plated terminals of display panel
US5424605A (en) * 1992-04-10 1995-06-13 Silicon Video Corporation Self supporting flat video display
GB2276270A (en) * 1993-03-18 1994-09-21 Ibm Spacers for flat panel displays
US5561340A (en) * 1995-01-31 1996-10-01 Lucent Technologies Inc. Field emission display having corrugated support pillars and method for manufacturing
US6433471B1 (en) * 1996-01-19 2002-08-13 Philips Electronics North America Corporation Plasma addressed liquid crystal display with glass spacers
US5708325A (en) * 1996-05-20 1998-01-13 Motorola Display spacer structure for a field emission device
US5811927A (en) * 1996-06-21 1998-09-22 Motorola, Inc. Method for affixing spacers within a flat panel display
KR100375615B1 (ko) * 1997-03-21 2003-04-18 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 백그라운드조명을위한평면형형광램프와이러한평면형형광램프를포함하는액정디스플레이장치
DE19817478B4 (de) * 1998-04-20 2004-03-18 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Flache Entladungslampe und Verfahren zu ihrer Herstellung
US6607118B2 (en) * 2001-04-30 2003-08-19 Asm Assembly Automation Limited Apparatus and method for ball release

Also Published As

Publication number Publication date
DE10343073A1 (de) 2005-04-21
CN1599004A (zh) 2005-03-23
DE502004005186D1 (de) 2007-11-22
EP1517359A2 (fr) 2005-03-23
JP2005100984A (ja) 2005-04-14
TWI261859B (en) 2006-09-11
ATE375601T1 (de) 2007-10-15
TW200523979A (en) 2005-07-16
US20050059312A1 (en) 2005-03-17
EP1517359A3 (fr) 2006-06-14
KR100646896B1 (ko) 2006-11-23
CA2481289A1 (fr) 2005-03-17
KR20050028314A (ko) 2005-03-22

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