EP0968521B1 - Flachstrahler mit dielektrisch behinderter entladung und anordnung zur durchführung der elektroden in den entladungsraum - Google Patents

Flachstrahler mit dielektrisch behinderter entladung und anordnung zur durchführung der elektroden in den entladungsraum Download PDF

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Publication number
EP0968521B1
EP0968521B1 EP98925419A EP98925419A EP0968521B1 EP 0968521 B1 EP0968521 B1 EP 0968521B1 EP 98925419 A EP98925419 A EP 98925419A EP 98925419 A EP98925419 A EP 98925419A EP 0968521 B1 EP0968521 B1 EP 0968521B1
Authority
EP
European Patent Office
Prior art keywords
flat lamp
lamp according
range
wall
discharge vessel
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
EP98925419A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0968521A1 (de
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/de
Application granted granted Critical
Publication of EP0968521B1 publication Critical patent/EP0968521B1/de
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
    • 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
    • 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 flat radiator according to the preamble of claim 1.
  • radiators having a planar geometry that emit light, i. visible electromagnetic radiation, or also ultraviolet (UV) and vacuum ultraviolet (VUV) radiation.
  • UV ultraviolet
  • VUV vacuum ultraviolet
  • Such radiation sources are suitable, depending on the spectrum of the emitted radiation, for general and auxiliary lighting, such as home and office illumination or backlighting of displays, such as LCDs (L iquid C rystal D isplays), for the transport and signal lighting, for the UV radiation, eg sterilization or photolytic.
  • general and auxiliary lighting such as home and office illumination or backlighting of displays, such as LCDs (L iquid C rystal D isplays), for the transport and signal lighting, for the UV radiation, eg sterilization or photolytic.
  • either the electrodes of one polarity or all the electrodes, ie both polarities, are separated from the discharge by means of a dielectric layer (unilaterally or two-sided dielectrically impeded discharge, see, for example, US Pat WO 94/23442 respectively. EP 0 363 832 ). Such electrodes are also referred to below as “dielectric electrodes”.
  • the dielectric layer may be formed by the wall of the discharge vessel itself by the electrodes being arranged outside the discharge vessel, for instance on the outer wall.
  • An advantage of this embodiment with external electrodes is that no gas-tight Strom be exchangegen must be passed through the wall of the discharge vessel.
  • the thickness of the dielectric layer an important parameter that influences, inter alia, the ignition voltage and the burning voltage of the discharge - determined essentially by the requirements of the discharge vessel, in particular its mechanical strength. Since the height of the required supply voltage increases with the thickness of the dielectric layer, the following disadvantages arise among others. In the first place, 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 contact protection are required.
  • the dielectric layer may also be realized in the form of an at least partial cladding or layer of at least one electrode arranged inside the discharge vessel.
  • This has the advantage that the thickness of the dielectric layer can be optimized for the discharge properties.
  • internal electrodes require gas-tight current feedthroughs. As a result, additional manufacturing steps are required, which usually makes the production more expensive.
  • elongate electrodes of different polarity are arranged alternately next to one another, as a result of which surface-like discharge configurations with relatively shallow discharge vessels can be realized.
  • the anodes and cathodes may be disposed on different sides of the inner wall of the discharge vessel, for example, such that each face an anode and cathode.
  • the electrodes are connected in pairs to the two poles of a voltage source.
  • strip-shaped electrodes are arranged, inter alia, on the outer wall of the discharge vessel.
  • a UV high-power radiator with strip-shaped electrodes is disclosed, which are arranged inter alia on the inner wall of the discharge vessel.
  • the inner electrodes of discharge lamps and radiators are connected to a wire-shaped or foil-like current supply.
  • a bushing connects the power supply in the interior of the discharge vessel with external power supply lines, which in turn serve to connect to an electrical supply source.
  • the implementation must be closely surrounded on the one hand by the material of the discharge vessel.
  • the materials of implementation usually a metal or a metal alloy, and discharge vessel, such as glass or ceramic, sometimes very different thermal expansion coefficients.
  • the bushings become thinner, among other things Wires realized.
  • this technique is limited to low amperages or lamp powers because the thin wires would otherwise burn through like a fuse.
  • This disadvantage is known to be remedied by using a thin film, such as a 10-20 microns thick molybdenum foil in the sealing area of the implementation.
  • strip-like electrode or shortening “electrode strip” is here and below an elongated, compared to its length very thin structure to be understood, which is able to act as an electrode can.
  • the edges of this structure need not necessarily be parallel to each other.
  • substructures should also be included along the longitudinal sides of the strips.
  • the invention proposes to further form the inner strip-like electrodes themselves as feedthroughs including external power supply lines.
  • the discharge vessel is composed of a bottom plate and a ceiling plate, which are soldered, e.g. Glass solder, - possibly, but not necessarily, via an additional frame - are interconnected.
  • a frame may be dispensed with if at least one of the two plates is e.g. Trough-shaped is such that a discharge space is enclosed by the bottom and top plate.
  • the electrode strips are each guided at one end through the solder through gas-tight to the outside.
  • the strips themselves are gas-tightly applied directly to the bottom plate and / or ceiling plate - similar to tracks on an electrical circuit board -, e.g. by vapor deposition, screen printing followed by baking or similar techniques.
  • the seal of the implementation and the other components takes over the solder.
  • the inner electrodes, the bushings and outer power supply lines are produced quasi simultaneously in a common manufacturing step as functionally different subregions of a respective single cathode-side or anode-side layer-like interconnect structure.
  • the number of handling and manufacturing steps is significantly reduced.
  • Another advantage of the invention is that it allows the cost-effective production almost arbitrarily large flat radiator, since said manufacturing section can be practically always realized independently of the size of the radiator.
  • the electrode strips may terminate after the feed-through region in a number of external power supply lines corresponding to the number of electrode strips.
  • Each electrode strip is thus considered to be a conductor track-like structure, which in each case comprises the three following, functionally different partial regions: inner electrode region, leadthrough region and outer current supply region.
  • This embodiment takes into account the fact that the mutual connection of the power supply lines of the same polarity for connection to the two poles of a voltage source and within a suitable connected between flat radiator and power supply terminal device, such as a specially adapted plug-cable combination, can be done.
  • the electrode strips of the same polarity pass into a common bus-like external power supply.
  • these two external power supply lines are each connected to one pole of a voltage source.
  • the materials for glass solder and frame as well as floor and ceiling tile are coordinated.
  • the thicknesses of the tracks are chosen 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 realized.
  • a sufficiently high current carrying capacity of the conductor tracks is of particular importance insofar as the high luminous intensities desired for such flat radiators ultimately result in high current intensities.
  • flat fluorescent lamps for the backlighting of liquid crystal displays is due to the low transmission of such displays of typically 6%, a particularly high light intensity indispensable.
  • This problem is further exacerbated in the preferred pulsed mode of operation of the discharge, since during the relatively short duration of repetitive active power injection, particularly high currents flow in the conductor tracks. Only in this way is it possible to couple sufficiently high mean effective powers and thereby achieve the desired high intensity of light over the course of time.
  • Typical thicknesses for conductive silver strips are in the range of about 5 microns to about 50 microns, preferably in the range of about 5.5 microns to about 30 microns, more preferably in the range of about 6 microns to about 15 microns.
  • Typical values for P 1 are in the range from 50 mm .mu.m to 680 mm .mu.m, preferably in the range from 100 mm .mu.m to 500 mm .mu.m, particularly preferably from 200 mm .mu.m to 400 mm .mu.m.
  • typical Values for P 2 are in the range of 8 to 20, preferably in the range of 9 to 18, particularly preferably in the range of 10 to 15.
  • FIGS. 1a and 1b 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 dielectrically impeded, strip-shaped anodes 4.
  • the discharge vessel 2 consists of a bottom plate 5, a ceiling plate 6 and a frame 7, all of which have a rectangular base.
  • Base plate 5 and ceiling plate 6 are gas-tightly connected by means of glass solder 8 with the frame such that the interior 9 of the discharge vessel 2 is formed cuboid.
  • the wall thickness of the floor and ceiling slab consisting of glass is approx. 2.5 mm in each case.
  • the frame is made of a glass tube with a diameter of about 5 mm. Between floor and ceiling slab precision glass spheres with a diameter of 5 mm are fitted equidistantly as supporting points at a mutual distance of about 34 mm by means of glass solder (not shown for the sake of clarity).
  • the bottom plate 5 is larger than the ceiling plate 6 such that the discharge vessel 2 has a circumferential freestanding edge.
  • the cathodes 3 and anodes 4 are arranged alternately and parallel to each other at a mutual distance of about 6 mm on the inner wall of the bottom plate 5.
  • the cathodes 3 and anodes 4 are extended at opposite ends and guided on both sides to the outside as cathode-side 10 or anode-side 11 feedthroughs from the interior 9 of the discharge vessel 2 on the bottom plate 5.
  • On the edge of the base plate 5 go through the bushings 10, 11 in each case in the cathode side 12 and the anode side 13 external power supply lines.
  • the external power supply lines serve as external contacts for the connection to 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 of the discharge into visible white light. It is a three-band phosphor with the blue component BAM (BaMgA1 10 O 17 : Eu 2+ ), the green component LAP (LaPO 4 : [Tb 3+ , Ce 3+ ]) and the red component YOB ([Y, Gd] BO 3 : Eu 3+ ).
  • the layer thickness is about 27 microns.
  • the inner wall of the floor slab, including the electrodes and of the frame is additionally coated with a phosphor mixture.
  • a light-reflecting layer of TiO 2 and Al 2 O 3 is applied directly on the inner wall of the bottom plate.
  • the layer thicknesses are about 15 microns and 7 microns. This variant is therefore not shown because the view of the electrode strips would be obscured by the phosphor layer.
  • the breakthrough in the ceiling plate 6 is for illustrative purposes only and gives a view of a portion of the anodes 4 and 3 cathodes free.
  • 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), whose thickness is about 250 microns.
  • 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 continuous layer structure made of silver, which are jointly applied by means of screen printing technology and subsequent baking.
  • the layer thickness is about 10 microns.
  • FIGS. 1a and 1b The in the Figures 2a-2c Flat radiator 1 'shown schematically in plan view and as a section along the lines AA and BB differs from the flat radiator 1 (FIG. FIGS. 1a and 1b ) only in the design of the external power supply 12; 13.
  • the feedthroughs 10, 11 of each electrode strip 3, 4 are initially continued on the edge of the bottom plate 5 and open into a cathode-side 12 or anode-side 13 bus-like conductor track.
  • These interconnects 12, 13 finally terminate in two adjacent sections 14, 15.
  • the two sections 14, 15 serve as external contacts for connection to an electrical voltage source (not shown).
  • Figure 2c is just one opposite FIG. 2b enlarged section along the line BB shown so that the conditions are better visible.
  • the cathode strips are applied to the inner wall of the ceiling plate.
  • Each cathode strip is associated with an anode strip pair such that viewed in cross-section each of the imaginary connection of cathodes and corresponding anodes results in the form of an inverted "V".
  • Cathode and anode strips are guided on the same side of the fluorescent lamp by means of feedthroughs to the outside and go on the corresponding edge of the ceiling or floor plate in the cathode-side or anode-side power supply over.
  • Both the anode strips and the cathode strips are completely covered with a dielectric layer which extends over the entire inner wall of the bottom and the top plate such that the dielectric layer additionally serves as a glass solder for the gas-tight connection.
  • a respective light-reflecting layer of TiO 2 and Al 2 O 3 is applied.
  • a phosphor layer of a BAM, LAP, YOB mixture is applied.

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)
EP98925419A 1997-03-21 1998-03-20 Flachstrahler mit dielektrisch behinderter entladung und anordnung zur durchführung der elektroden in den entladungsraum Expired - Lifetime EP0968521B1 (de)

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 (de) 1997-03-21 1998-03-20 Flachstrahler mit dielektrisch behinderter entladung und anordnung zur durchführung der elektroden in den entladungsraum

Publications (2)

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

Family

ID=26035100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98925419A Expired - Lifetime EP0968521B1 (de) 1997-03-21 1998-03-20 Flachstrahler mit dielektrisch behinderter entladung und anordnung zur durchführung der elektroden in den entladungsraum

Country Status (9)

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

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 (en) * 2003-12-03 2008-09-17 Samsung Electronics Co., Ltd. Flat lamp
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

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
US3778127A (en) * 1971-12-30 1973-12-11 Ibm Sealing technique for gas panel
JPS54184065U (hu) * 1978-06-19 1979-12-27
JPS60172135A (ja) * 1984-02-15 1985-09-05 Mitsubishi Electric Corp 平板状光源
CH676168A5 (hu) * 1988-10-10 1990-12-14 Asea Brown Boveri
WO1992002947A1 (en) * 1990-08-03 1992-02-20 Lynn Judd B Thin configuration flat form vacuum-sealed envelope
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

Also Published As

Publication number Publication date
CA2281091C (en) 2006-11-21
TW393665B (en) 2000-06-11
CN1251205A (zh) 2000-04-19
CN1278375C (zh) 2006-10-04
JP3490461B2 (ja) 2004-01-26
CA2281091A1 (en) 1998-10-01
DE59814343D1 (de) 2009-03-26
KR100417438B1 (ko) 2004-02-05
EP0968521A1 (de) 2000-01-05
JP2000510283A (ja) 2000-08-08
WO1998043280A1 (de) 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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