EP0968521A1 - Spot plat a decharge separee par une couche dielectrique et dispositif destine au passage des electrodes dans l'espace de decharge - Google Patents

Spot plat a decharge separee par une couche dielectrique et dispositif destine au passage des electrodes dans l'espace de decharge

Info

Publication number
EP0968521A1
EP0968521A1 EP98925419A EP98925419A EP0968521A1 EP 0968521 A1 EP0968521 A1 EP 0968521A1 EP 98925419 A EP98925419 A EP 98925419A EP 98925419 A EP98925419 A EP 98925419A EP 0968521 A1 EP0968521 A1 EP 0968521A1
Authority
EP
European Patent Office
Prior art keywords
flat radiator
discharge vessel
radiator according
wall
range
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.)
Granted
Application number
EP98925419A
Other languages
German (de)
English (en)
Other versions
EP0968521B1 (fr
Inventor
Frank Vollkommer
Lothar Hitzschke
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
Priority claimed from DE1997111891 external-priority patent/DE19711891A1/de
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP0968521A1 publication Critical patent/EP0968521A1/fr
Application granted granted Critical
Publication of EP0968521B1 publication Critical patent/EP0968521B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01J61/307—Flat vessels or containers with folded elongated discharge path
    • 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 is based on a flat radiator according to the preamble of claim 1.
  • flat radiator here means radiators with a flat geometry that emit light, i.e. visible electromagnetic radiation, or also ultraviolet (UV) and vacuum ultraviolet (VUV) radiation.
  • UV ultraviolet
  • VUV vacuum ultraviolet
  • such radiation sources are suitable for general and auxiliary lighting, e.g. Residential and office lighting or background lighting for displays, for example LCDs (Liquid Crystal Displays), for traffic and signal lighting, for UV radiation, e.g. Disinfection or photolytics.
  • general and auxiliary lighting e.g. Residential and office lighting or background lighting for displays, for example LCDs (Liquid Crystal Displays), for traffic and signal lighting, for UV radiation, e.g. Disinfection or photolytics.
  • either the electrodes of one polarity or all electrodes, that is to say both polarities, are separated from the discharge by means of a dielectric layer (one-sided or two-sided dielectric barrier discharge, see, for example, WO 94/23442 or EP 0363 832).
  • a dielectric layer one-sided or two-sided dielectric barrier discharge, see, for example, WO 94/23442 or EP 0363 832).
  • Such electrodes are also referred to in the following as "dielectric electrodes”.
  • the dielectric layer can be formed by the wall of the discharge vessel itself, in that the electrodes are arranged outside the discharge vessel, for example on the outer wall.
  • the thickness of the dielectric layer - an important parameter that influences, among other things, the ignition voltage and the operating voltage of the discharge - is essentially determined by the requirements placed on the discharge vessel, in particular its mechanical strength. Since the level of the required supply voltage increases with the thickness of the dielectric layer, there are the following disadvantages, among others.
  • the voltage supply provided for the operation of the flat radiator must be designed for the higher voltage requirement. This is usually associated with additional costs and larger external dimensions. In addition, higher safety precautions for protection against accidental contact are required.
  • the dielectric layer can also be implemented in the form of an at least partial covering or layer of at least one electrode arranged within the discharge vessel.
  • This has the advantage that the thickness of the dielectric layer can be optimized for the discharge properties.
  • inner electrodes require gas-tight leadthroughs. As a result, additional manufacturing steps are required, which generally makes the manufacturing more expensive.
  • Elongated electrodes with different polarity are usually arranged alternately next to one another, as a result of which planar discharge configurations can be realized with relatively flat discharge vessels.
  • the anodes and cathodes can be arranged on different sides of the inner wall of the discharge vessel, for example in such a way that one anode and one cathode oppose each other. survive.
  • the electrodes are connected in pairs to the two poles of a voltage source. A particularly efficient method for operating radiators with dielectric electrodes is described in WO 94/23442.
  • a flat radiator is known which, with the aid of a sequence of active power pulses separated by pauses, i.e. is operated in accordance with the operating method of WO 94/23442.
  • strip-shaped electrodes are arranged on the outer wall of the discharge vessel, among other things.
  • EP 0363 832 discloses, among other things, a UV high-power radiator with strip-shaped electrodes which are arranged, inter alia, on the inner wall of the discharge vessel. However, there is no information on current bushings for connecting the inner electrodes to a voltage source.
  • the inner electrodes of discharge lamps and emitters are usually connected to a wire-like or foil-like power supply.
  • a bushing connects the power supply inside the discharge vessel to external power supplies, which in turn serve to connect to an electrical supply source.
  • the bushing must be closely surrounded by the material of the discharge vessel.
  • the materials of the bushing usually a metal or a metal alloy, and discharge vessel, for example glass or ceramic, sometimes have very different coefficients of thermal expansion.
  • the lead-throughs are, among other things, very thin Wires realized.
  • this technology is limited to low currents or lamp outputs, since the thin wires would otherwise blow out like a fuse. This disadvantage is known to be remedied by using a thin film, for example an approximately 10-20 ⁇ m thick molybdenum film, in the sealing area of the bushing.
  • strip-like electrode or, to shorten it, “electrode strip” is to be understood here and below to mean an elongated structure which is very thin in comparison to its length and which is capable of acting as an electrode.
  • the edges of this structure need not necessarily be parallel to one another.
  • substructures should also be included along the long sides of the strips.
  • the invention proposes to further develop the inner strip-like electrodes themselves also as bushings including external power supplies.
  • the discharge vessel is made up of a base plate and a cover plate, which can be soldered, e.g. Glass solder, - possibly, but not necessarily, via an additional frame - are connected to each other.
  • soldered e.g. Glass solder
  • a frame can be dispensed with if at least one of the two panels e.g. is shaped like a trough in such a way that a discharge space is enclosed by the base and ceiling plate.
  • One end of the electrode strips is guided gas-tight to the outside through the solder.
  • the strips themselves are applied gas-tight directly on the base plate and / or ceiling plate - similar to conductor tracks on an electrical circuit board - e.g. by vapor deposition, screen printing with subsequent baking or similar techniques.
  • the solder seals the bushing and the other components.
  • the inner electrodes, the leadthroughs and the external power supply lines are produced virtually simultaneously in a common manufacturing step as functionally different sub-areas of a single layer-like conductor track structure on the cathode side or anode side, respectively.
  • the number of handling and manufacturing steps is significantly reduced.
  • Another advantage of the invention is that it enables the inexpensive production of flat radiators of almost any size, since the production section mentioned can always be implemented in the same way practically regardless of the size of the radiator7 Outside of the discharge vessel, the electrode strips can end in a first simple embodiment after the lead-through area in a number of external current leads corresponding to the number of electrode strips.
  • Each electrode strip is thus considered as a conductor track-like structure, which in each case comprises the following three functionally different sub-areas: inner electrode area, lead-through area and outer current supply area.
  • This embodiment takes into account the fact that the mutual connection of the current leads of the same polarity for connection to the two poles of a voltage source can also take place within a suitable connection device connected between flat radiator and voltage source, for example a specially adapted plug-cable combination.
  • the electrode strips of the same polarity each merge into a common, bus-like external power supply.
  • these two external power supplies are connected to one pole of a voltage source.
  • the materials for glass solder and frame as well as floor and ceiling plate are coordinated.
  • the thicknesses of the conductor tracks are chosen to be so thin that on the one hand the thermal stresses remain low and on the other hand the current strengths required during operation can be achieved.
  • a sufficiently high current carrying capacity of the conductor tracks is of particular importance insofar as the high luminous intensities sought for such flat radiators ultimately require high current intensities.
  • a particularly high light intensity is essential due to the low transmission of such displays of typically 6%.
  • Typical thicknesses for conductive silver strips are in the range from approximately 5 ⁇ m to approximately 50 ⁇ m, preferably in the range from approximately 5.5 ⁇ m to approximately 30 ⁇ m, particularly preferably in the range from approximately 6 ⁇ m to approximately 15 ⁇ m.
  • Support points for example in the form of glass spheres, which are arranged at a suitable distance from one another between the floor and ceiling panels, may also contribute to this, which give the flat radiator sufficient bending stability without causing unacceptably strong shading.
  • Typical values for P j are in the range from 50 mm ⁇ m to 680 mm ⁇ m, preferably in the range from 100 mm ⁇ m to 500 mm ⁇ m, particularly preferably from 200 mm ⁇ m to 400 mm ⁇ m.
  • Typical Values for P 2 are in the range from 8 to 20, preferably in the range from 9 to 18, particularly preferably in the range from 10 to 15.
  • Fig. Lb shows a cross section through the flat radiator from Figure la along the line AA.
  • FIG. 2a shows a second embodiment of a flat radiator in a partially broken top view
  • FIG. 2b shows a cross section through the flat radiator from FIG. 2a along the line AA
  • FIG. 2c shows a section of a cross section through the flat radiator from FIG. 2b along the line BB.
  • Figures la and lb schematically show a flat radiator 1 in plan view and a sectional view along the line AA.
  • the flat radiator 1 consists of a discharge vessel 2, strip-shaped cathodes 3 and dielectric-disabled, strip-shaped anodes 4.
  • the discharge vessel 2 consists of a base plate 5, a ceiling plate 6 and a frame 7, all of which have a rectangular base area.
  • Base plate 5 and ceiling plate 6 are gas-tightly connected to the frame by means of glass solder 8 in such a way that the interior 9 of the discharge vessel 2 is cuboid.
  • the wall thickness of the glass floor and ceiling panels is approx. 2.5 mm each.
  • the frame is made of a glass tube with a diameter of approx. 5 mm. Precision glass balls with a diameter of 5 mm are fitted equidistantly between the floor and ceiling slab as support points at a mutual distance of approx. 34 mm using glass solder (not shown for reasons of clarity).
  • the base plate 5 is larger than the cover plate 6 in such a way that the discharge vessel 2 has a circumferential free-standing edge.
  • the cathodes 3 and anodes 4 are arranged alternately and parallel to one another at a mutual spacing of approximately 6 mm on the inner wall of the base plate 5.
  • the cathodes 3 and anodes 4 are extended at opposite ends and, as cathode-side 10 and anode-side 11 bushings, are guided outwards from the inside 9 of the discharge vessel 2 on the base plate 5 on both sides.
  • the bushings 10, 11 each merge into 12 or 13 anode-side external power supplies.
  • the external power supply lines serve as external contacts for the connection with preferably an electrical pulse voltage source (not shown), optionally by means of suitable plug connections (not shown).
  • a layer 16 of a phosphor mixture is applied, which converts the predominantly short-wave radiation from the discharge into visible white light. It is a three-band phosphor with the blue component BAM (BaMgAlioOiy: Eu 2+ ), the green component LAP (LaPO.: [Tb 3+ , Ce 3+ ]) and the red component YOB ([Y, Gd] BÜ3: Eu 3 + ).
  • the layer thickness is approx. 27 ⁇ m.
  • the inner wall of the base plate including the electrodes and the frame are additionally coated with a phosphor mixture.
  • a light-reflecting layer of Ti0 2 and A1 2 0 3 is applied directly to the inner wall of the base plate.
  • the layer thicknesses are approx. 15 ⁇ m or 7 ⁇ m. This variant is not shown because the phosphor layer would obscure the view of the electrode strips.
  • the breakthrough in the ceiling plate 6 is used only for illustrative purposes and provides a view of part of the anodes 4 and cathodes 3.
  • the anodes 4 are completely covered with a glass layer 17 (see also FIG. 1b, which shows a section of the flat radiator 1 along an anode 4), the thickness of which is approximately 250 ⁇ m.
  • the electrodes 3; 4, feedthroughs 10; 11 and external power supply lines 12; 13 are realized as functionally different sections of a cathode-side and an anode-side coherent layer structure made of silver, which are applied together by means of screen printing technology and subsequent baking.
  • the layer thickness is approx. 10 ⁇ m.
  • the flat radiator V shown schematically in FIGS. 2a-2c in plan view and as a section along the lines AA or BB differs from the flat radiator 1 (FIGS. 1a and 1b) only in the design of the external power supply 12; 13.
  • the bushings 10; 11 of each electrode strips 3; 4 are initially continued on the edge of the base plate 5 and end in a cathode-side 12 or anode-side 13 bus-like conductor track.
  • These conductor tracks 12; 13 finally end in two adjacent sections 14; 15.
  • the two sections 14; 15 serve as external contacts for the connection to an electrical voltage source (not shown).
  • FIG. 2c only a section along the line BB is enlarged compared to FIG.
  • the cathode strips are applied to the inner wall of the ceiling plate.
  • a pair of anode strips is assigned to each cathode strip in such a way that, when viewed in cross section, the imaginary connection of the cathodes and corresponding anodes results in the shape of an upside-down “V”.
  • Cathode and anode strips are led through to the outside on the same side of the fluorescent lamp and pass on the corresponding edge of the ceiling or floor plate into the cathode-side or anode-side power supply.
  • Both the anode strips and the cathode strips are completely covered with a dielectric layer that covers the entire inner wall of the floor and ceiling plates extends in such a way that the dielectric layer also serves as a glass solder for the gas-tight connection.
  • a light-reflecting layer of Ti0 2 and A1 2 0 3 is applied to the dielectric layer of the base plate.
  • the last layer is followed by a layer on the dielectric layer of the ceiling plate L phosphor layer made of a BAM, LAP, YOB mixture.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

L'invention concerne un spot plat (1) comprenant un contenant (2) à décharge rempli de gaz, fermé et renfermant des électrodes en forme de bandes séparées de la décharge par une couche diélectrique. Le contenant (2) à décharge est constitué au moins d'une plaque de base (5) et d'un couvercle (6) qui sont assemblés de façon étanche au gaz par une soudure (8) et éventuellement aussi par un cadre (7) supplémentaire placé entre la plaque de base et le couvercle. De plus, les électrodes (3, 4) internes en forme de bandes se transforment en passages (10, 11) et ces passages en amenées de courant (12, 13) de telle façon que les électrodes (3, 4) internes, les passages (10, 11) et les amenées de courant (12, 13) soient respectivement conçus comme différentes sections fonctionnelles de structures (3, 10, 12; 4, 11, 13) de type conducteurs imprimés sur les cathodes et anodes. Au moins les anodes (4) sont respectivement recouvertes d'une couche diélectrique (17). Les passages (10, 11) sont, en plus, éventuellement recouverts de façon étanche au gaz par la soudure (8).
EP98925419A 1997-03-21 1998-03-20 Spot plat a decharge separee par une couche dielectrique et dispositif destine au passage des electrodes dans l'espace de decharge Expired - Lifetime EP0968521B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19711891 1997-03-21
DE1997111891 DE19711891A1 (de) 1997-03-21 1997-03-21 Flachstrahler
DE19729175A DE19729175A1 (de) 1997-03-21 1997-07-08 Flachstrahler
DE19729175 1997-07-08
PCT/DE1998/000828 WO1998043280A1 (fr) 1997-03-21 1998-03-20 Spot plat a decharge separee par une couche dielectrique et dispositif destine au passage des electrodes dans l'espace de decharge

Publications (2)

Publication Number Publication Date
EP0968521A1 true EP0968521A1 (fr) 2000-01-05
EP0968521B1 EP0968521B1 (fr) 2009-02-11

Family

ID=26035100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925419A Expired - Lifetime EP0968521B1 (fr) 1997-03-21 1998-03-20 Spot plat a decharge separee par une couche dielectrique et dispositif destine au passage des electrodes dans l'espace de decharge

Country Status (9)

Country Link
EP (1) EP0968521B1 (fr)
JP (1) JP3490461B2 (fr)
KR (1) KR100417438B1 (fr)
CN (1) CN1278375C (fr)
CA (1) CA2281091C (fr)
DE (2) DE19729175A1 (fr)
HU (1) HUP0003101A3 (fr)
TW (1) TW393665B (fr)
WO (1) WO1998043280A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19927791A1 (de) * 1999-06-18 2000-12-21 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Farbanzeige mit sequentieller Primärfarberzeugung
JP4493064B2 (ja) * 2000-10-06 2010-06-30 日本電気株式会社 平面型蛍光ランプの固定構造、及び液晶表示装置
KR100745746B1 (ko) * 2001-01-04 2007-08-02 삼성전자주식회사 수직 대향 방전형 평판램프
DE10133949C1 (de) * 2001-07-17 2003-03-20 Inst Niedertemperatur Plasmaph Vorrichtung zur Erzeugung von Gasentladungen, die nach dem Prinzip der dielektrisch behinderten Entladung aufgebaut ist, für Lichtquellen und Sichtanzeigeeinrichtungen
EP1562221A3 (fr) * 2003-12-03 2008-09-17 Samsung Electronics Co., Ltd. Lampe plate
DE102004039902B3 (de) * 2004-08-17 2006-04-06 Berger Gmbh Flächige Gasentladungslampe und Verfahren zu ihrer Herstellung
KR100657902B1 (ko) * 2004-10-13 2006-12-14 삼성코닝 주식회사 평판 램프
DE102004055328B3 (de) * 2004-11-16 2006-04-13 Institut für Niedertemperatur-Plasmaphysik e.V. Vorrichtung nach dem Prinzip einer dielektrisch behinderten Entladung zur Strahlungserzeugung
KR101491949B1 (ko) * 2014-02-11 2015-02-09 조선대학교산학협력단 멤스 기반 우주용 가변 방사율 라디에이터

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US3778127A (en) * 1971-12-30 1973-12-11 Ibm Sealing technique for gas panel
JPS54184065U (fr) * 1978-06-19 1979-12-27
JPS60172135A (ja) * 1984-02-15 1985-09-05 Mitsubishi Electric Corp 平板状光源
CH676168A5 (fr) * 1988-10-10 1990-12-14 Asea Brown Boveri
WO1992002947A1 (fr) * 1990-08-03 1992-02-20 Lynn Judd B Enveloppe de forme plate et de configuraiton mince scellee sous vide
JP2965861B2 (ja) * 1994-07-07 1999-10-18 スタンレー電気株式会社 平面型蛍光ランプ
JP3053548B2 (ja) * 1995-04-07 2000-06-19 スタンレー電気株式会社 電界放電型の平面蛍光ランプ
KR200143501Y1 (ko) * 1995-05-09 1999-06-15 박현승 평면 형광 램프
DE19526211A1 (de) * 1995-07-18 1997-01-23 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben von Entladungslampen bzw. -strahler
KR100263773B1 (ko) * 1998-03-23 2000-08-16 구자홍 플라즈마 디스플레이 패널의 유지전극 구조
KR100720412B1 (ko) * 2000-10-31 2007-05-22 엘지.필립스 엘시디 주식회사 면 발광용 플랫램프 및 이를 구비한 액정표시장치

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Also Published As

Publication number Publication date
CA2281091C (fr) 2006-11-21
TW393665B (en) 2000-06-11
CN1251205A (zh) 2000-04-19
CN1278375C (zh) 2006-10-04
JP3490461B2 (ja) 2004-01-26
EP0968521B1 (fr) 2009-02-11
CA2281091A1 (fr) 1998-10-01
DE59814343D1 (de) 2009-03-26
KR100417438B1 (ko) 2004-02-05
JP2000510283A (ja) 2000-08-08
WO1998043280A1 (fr) 1998-10-01
HUP0003101A3 (en) 2003-02-28
HUP0003101A2 (hu) 2001-01-29
KR20000076318A (ko) 2000-12-26
DE19729175A1 (de) 1999-01-14

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