EP1080483A1 - Flache entladungslampe und verfahren zu ihrer herstellung - Google Patents
Flache entladungslampe und verfahren zu ihrer herstellungInfo
- Publication number
- EP1080483A1 EP1080483A1 EP99945731A EP99945731A EP1080483A1 EP 1080483 A1 EP1080483 A1 EP 1080483A1 EP 99945731 A EP99945731 A EP 99945731A EP 99945731 A EP99945731 A EP 99945731A EP 1080483 A1 EP1080483 A1 EP 1080483A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ceiling
- discharge lamp
- support points
- viscosity
- lamp according
- 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
Links
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
- H01J9/40—Closing vessels
-
- 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
- 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
-
- 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
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/395—Filling vessels
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2211/00—Plasma display panels with alternate current induction of the discharge, e.g. AC-PDPs
- H01J2211/20—Constructional details
- H01J2211/34—Vessels, containers or parts thereof, e.g. substrates
- H01J2211/36—Spacers, barriers, ribs, partitions or the like
Definitions
- the invention is based on a flat discharge lamp according to the preamble of claim 1.
- the invention relates to a method according to the preamble of the method claim for producing this discharge lamp.
- discharge lamp here encompasses sources of electromagnetic radiation based on gas discharges.
- the spectrum of the radiation can encompass both the visible range and the UV (ultraviolet) / VUV (vacuum ultraviolet) range and the IR (infrared) range.
- a phosphor layer can also be provided for converting invisible to visible radiation.
- these are flat discharge lamps with so-called dielectrically impeded electrodes.
- the dielectrically impeded electrodes are typically realized in the form of thin metallic strips which are arranged on the outer and / or inner wall of the discharge vessel. If all electrodes are arranged on the inner wall, at least some of the electrodes must be completely covered with a dielectric layer in relation to the inside of the discharge vessel.
- Discharge lamps of this type are known, for example, from EP 0363 832 (FIG. 3) and German patent application P 19711 892.5 (FIGS. 3a, 3b). - 2 -
- Flat discharge lamps - also known as flat spotlights - have a discharge vessel that consists of a base and ceiling plate, e.g. made of glass, which are connected to each other via a frame.
- a frame can be dispensed with if the base and / or ceiling part is not planar but is shaped in such a way that a discharge vessel is already formed when only the base and ceiling part are joined.
- the floor and / or ceiling part can be trough-shaped, e.g. by deep drawing.
- the majority of the shaped base or ceiling part is at least approximately flat in this case and therefore requires one or more support points for stabilization.
- floor and ceiling slab are therefore also to be understood to mean structures which may not be completely, but at least predominantly (approximately) plan.
- the discharge vessel contains a gas filling of defined composition and filling pressure and must therefore be evacuated before filling. Consequently, the discharge vessel must withstand both negative pressure - namely during the manufacture of the lamp - and the subsequent filling pressure, which is less than atmospheric pressure, for example between 10 kPa and 20 kPa. According to the information provided by glass manufacturers, this fatigue strength is to be estimated at around 8 MPa and, depending on the glass thickness used, results from the maximum deflection over a distance between two supports. The latter is inversely proportional to the glass thickness used and, at a certain temperature, also depends on the pressure difference between the inside of the discharge vessel and the outside. - 3 -
- the fatigue strength can be achieved with a given pressure difference and temperature, even with thin glasses, by shortening the distance between two bearings.
- support points are used which are arranged in sufficient position and number over the base area of the discharge vessel. The mutual nearest neighbor distance of the support points is dimensioned so that the desired route length is never exceeded at any point.
- the support points usually consist of a glass rod section, glass ring, glass tube or a glass ball, the height or diameter of which corresponds to the frame height. So far, the support points have been glued to the floor and / or ceiling plate using a suitable sintered glass. The glue only fixes the support points, but is too thin to compensate for height differences.
- Integrated glass webs are also known.
- One possibility is to process a solid material by sandblasting in such a way that the base plate is of the appropriate thickness and the glass webs are of the desired shape and height.
- the cover glass and glass web are bonded by means of gluing using a sintered glass.
- Another possibility is the integration of the webs by heat treatment of the glass, such as. B. deep drawing by means of negative pressure or dead weight or pressing.
- the floor or ceiling slab is heated above its softening point and shaped using a mold using standard methods. - 4 -
- Another object is to provide an improved method for producing flat discharge lamps.
- a prerequisite for the considerations made at the outset for stabilizing the discharge vessel by means of support points is that sufficient support on both sides of the floor and ceiling plate is ensured at all support points. If a support point does not have contact on both sides, it will fail as an effective support. As a result, the free distance doubles in the area of this ineffective support point, viewed radially from it and in the plane of the plates. Under certain circumstances, this may result in the desired route length being exceeded and the fatigue strength being inadmissibly reduced. For this reason, unevenness of the floor and ceiling slab over the base of the discharge space and height tolerances of the frame must be taken into account and compensated for. This causes increased difficulties, in particular as the number of support points increases and the area becomes larger.
- the invention proposes support points, each consisting of two components. These two components are distinguished by the fact that they have clearly different viscosities when the vessel is joined, that is to say at the joining temperature.
- a component works as a so-called "hard part” and has a very high viscosity, typically more than 10 9 dPa s, preferably 10 11 dPa s and more at the joining temperature.
- a soda lime silicate glass for example, is suitable.
- the other component works as a so-called “soft part”, with a low viscosity which is matched to the joining temperature in the range from typically 10 8 dPa s to approx. 10 5 dPa s or less, ie at the joining temperature it may be less Force, a defined and non-destructive deformation just given.
- Sintered glass or lead glass for example, is suitable.
- the function of a two-component support point in the manufacture of a flat discharge lamp is that its height before the lamp is deliberately exceeded, for example, the height of the frame - 6 -
- the ceiling tile only rests on the support points before the joining process.
- the "soft" part of the support points becomes sufficiently low-viscosity, typically of the order of 10 7 dPa s, to deform under the weight of the ceiling tile.
- the ceiling plate sinks onto the frame pasted with solder, for example glass solder, and fuses with it. In this way the lamp is sealed.
- each support point self-levels to the required height, i.e. exactly so that each support point has contact on both sides with the floor or ceiling plate.
- this property of the two-component support point enables the lamp to be manufactured in a vacuum furnace filled with filling gas under filling pressure, since the lamp closes automatically when the joining temperature is reached.
- the support points can also consist for the most part of a low-viscosity component and a high-viscosity separating layer as the second component, which prevents the low-viscosity component from sintering onto the floor or ceiling plate.
- Fluorescent can also serve as a release agent.
- FIG. 1 a shows a partial section through a flat discharge lamp before the discharge vessel is hermetically sealed, - 7 -
- FIG. 1b shows a partial section through a finished flat discharge lamp
- Figure 2 is a partial section through another flat discharge lamp to explain the height compensation effect of the two-component support points.
- FIGS. 1a and 1b each show a schematic partial section through a flat discharge lamp 1 before the discharge vessel 2 is hermetically sealed or in the finished state.
- the electrodes are usually applied to the floor and / or ceiling plate, e.g. by means of printing technology, possibly additional dielectric layers, phosphor layers, etc., but this is not shown for reasons of clarity. Otherwise, the process steps for realizing these features are familiar to the person skilled in the art.
- a circumferential frame 3 is applied to the base plate 5 by means of glass solder 4.
- the height of the frame 3 above the inner wall of the base plate 5 is approximately 5 nm.
- a circumferential glass solder path 4 is also applied to the ceiling plate 6.
- the frame, floor and ceiling panels are made of soda lime glass. The glass solder 4 is used when the individual parts are later joined to fuse and seal the base plate 5 and the cover plate 6 with the frame 3.
- circular cylinder pieces 7 made of alkali blue glass (40 wt.% PbO content) are arranged on the base plate 5 at the desired mutual distance.
- a glass ball 8 made of soda lime silicate glass is then placed on each circular cylinder piece 7.
- the diameter of the glass balls 8 is approximately 5 mm.
- Partial support points 7, 8 above the base plate 5 larger than the corresponding height of the frame by about 1 mm.
- cover plate 6 is placed on balls 8 and the entire arrangement of base plate 5, frame 3 with glass solder 4, two-part support points 7, 8 and cover plate 6 is brought into an evacuable oven (not shown).
- the furnace is then evacuated at a temperature of approx. 350 ° C for about 30 minutes in order to largely remove impurities. Since the circular cylinder pieces 7 are not yet sufficiently low-viscosity at the temperature of approximately 350 ° C., the ceiling plate 6 and the frame 3 are not yet joined together during this verticalization step.
- the temperature in the oven is then increased to approx. 520 ° C.
- the circular cylinder pieces 7 are so far viscous, on the order of approximately 10 6 dPa s, that the ceiling plate 6 sinks onto the frame 3.
- the glass solder 4 is also low-viscosity, in the order of approximately 10 5 dPa s, that it joins the base plate 5 and the cover plate 6 with the frame 3 to form a gas-tight discharge vessel 2.
- the individual support points 7, 8 level to the exactly required height such that each support point 7, 8 has contact with the floor 5 or ceiling plate 6 on both sides.
- the viscosity of the floor and ceiling slab, frame and glass balls is more than 10 9 dPa s at the joining temperature of 520 ° C.
- FIG shows a schematic partial section through a flat lamp 1 'with a sloping ceiling plate 6 with respect to the base plate 5.
- This skew is caused by the fact that the left part 3a of the frame is higher than the right part 3b.
- This undesirable skew is greatly exaggerated for clarification.
- Similar misalignments can also be caused by locally fluctuating plate thicknesses and / or insufficient flatness of the plates or the like.
- Figure 2 it can be clearly seen that the heights of the circular cylinder pieces 71-73 increase from right to left and in this way compensate for the different distances between the base plate 5 and the ceiling plate 6.
- the first component consists of a tube made of soda lime silicate glass and the second component consists of a gutter made of lead glass.
- one tube is partially embedded in a channel and thus forms a support point which extends along one side of the base plate parallel to a frame side.
- This variant has the advantage that these support points made of pipe and gutter support the plates in a line-like manner rather than point-like as above. This can be particularly advantageous for very large-area lamps, since then, instead of very many balls with rings, only relatively few tubes with channels are required.
- the lamp can also be provided with a pump tube for evacuating or filling the completely assembled discharge vessel.
- a pump tube for evacuating or filling the completely assembled discharge vessel.
- an oven that can be evacuated and filled can be dispensed with.
- the manufacturing process is then modified such that the discharge vessel is first assembled in the furnace as described above and provided with a pump tube.
- the discharge vessel is then evacuated via the pump tube and simultaneously heated in the furnace. After that - 10 -
- the discharge vessel is filled with the filling gas via the pump tube and finally closed.
- the lamp is finished.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Plasma & Fusion (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19817478A DE19817478B4 (de) | 1998-04-20 | 1998-04-20 | Flache Entladungslampe und Verfahren zu ihrer Herstellung |
DE19817478 | 1998-04-20 | ||
PCT/DE1999/001089 WO1999054913A1 (de) | 1998-04-20 | 1999-04-09 | Flache entladungslampe und verfahren zu ihrer herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1080483A1 true EP1080483A1 (de) | 2001-03-07 |
EP1080483B1 EP1080483B1 (de) | 2002-09-18 |
Family
ID=7865127
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99945731A Expired - Lifetime EP1080483B1 (de) | 1998-04-20 | 1999-04-09 | Flache entladungslampe und verfahren zu ihrer herstellung |
Country Status (8)
Country | Link |
---|---|
US (1) | US6659828B1 (de) |
EP (1) | EP1080483B1 (de) |
JP (1) | JP2003522369A (de) |
KR (1) | KR100415703B1 (de) |
CA (1) | CA2329086A1 (de) |
DE (2) | DE19817478B4 (de) |
TW (1) | TW434642B (de) |
WO (1) | WO1999054913A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19936863A1 (de) * | 1999-08-05 | 2001-02-15 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Herstellungsverfahren für eine Gasentladungslampe |
DE10006750A1 (de) * | 2000-02-15 | 2001-08-16 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Herstellungsverfahren für eine flache Gasentladungslampe |
DE10048187A1 (de) * | 2000-09-28 | 2002-04-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Entladungslampe für dielektrisch behinderte Entladungen mit Stützelementen zwischen einer Bodenplatte und einer Deckenplatte |
DE10048410A1 (de) * | 2000-09-29 | 2002-04-11 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Dielektrische Barriere-Entladungslampe |
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 |
DE10138924A1 (de) | 2001-08-08 | 2003-02-20 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren zum Herstellen eines stillen Flachstrahlers |
DE10138925A1 (de) | 2001-08-08 | 2003-02-20 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren zum Herstellen einer Entladungslampe |
DE10147728A1 (de) * | 2001-09-27 | 2003-04-10 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Entladungslampe mit stabilisierter Entladungsgefäßplatte |
DE10343073A1 (de) * | 2003-09-17 | 2005-04-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren zur Herstellung einer flachen Entladungslampe mit Abstandselementen |
US6992440B2 (en) * | 2004-02-26 | 2006-01-31 | Asahi Glass Company, Limited | Light-emitting device and process for its production |
EP1650127B1 (de) * | 2004-10-20 | 2008-07-23 | Airbus Deutschland GmbH | Beleuchtungseinheit für Flugzeuge |
DE102004055328B3 (de) * | 2004-11-16 | 2006-04-13 | Institut für Niedertemperatur-Plasmaphysik e.V. | Vorrichtung nach dem Prinzip einer dielektrisch behinderten Entladung zur Strahlungserzeugung |
KR101176056B1 (ko) * | 2004-12-01 | 2012-08-24 | 엘리노 인더스트리에-오펜바우 게엠바하 | 평면 모니터 등을 제작하기 위한 유닛을 제조하는 방법 및 장치, 및 이러한 유닛 내부의 중간 공간을 진공화?충전하는 장치 |
KR100730044B1 (ko) | 2005-12-06 | 2007-06-20 | 엘지전자 주식회사 | 격벽용 슬러리, 그린시트 및 플라즈마 디스플레이 패널의격벽 제조방법 |
DE102006003828A1 (de) * | 2006-01-26 | 2007-08-02 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Herstellung von flachen dielektrischen Barriere-Entladungslampen |
DE102007009192A1 (de) * | 2007-02-26 | 2008-08-28 | Osram Gesellschaft mit beschränkter Haftung | Verfahren zum Herstellen einer Entladungslampe, insbesondere einer Flachlampe |
DE502007005808D1 (de) * | 2007-08-01 | 2011-01-05 | Osram Gmbh | Herstellungsverfahren für entladungslampen |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT305405B (de) * | 1970-12-30 | 1973-02-26 | Electrovac | Plattenstapel und Verfahren zu dessen Herstellung |
US3778127A (en) * | 1971-12-30 | 1973-12-11 | Ibm | Sealing technique for gas panel |
US3975176A (en) | 1975-01-02 | 1976-08-17 | Owens-Illinois, Inc. | Method of sealing tubulation with preformed solder glass |
JPS5446215A (en) * | 1977-09-21 | 1979-04-12 | Hitachi Ltd | Sealing glass |
WO1981001910A1 (en) | 1979-12-20 | 1981-07-09 | United Technologies Corp | Fusible spacer for plasma display panel |
CH675504A5 (de) | 1988-01-15 | 1990-09-28 | Asea Brown Boveri | |
CH676168A5 (de) * | 1988-10-10 | 1990-12-14 | Asea Brown Boveri | |
JPH03225743A (ja) | 1990-01-29 | 1991-10-04 | Nec Home Electron Ltd | 平面型希ガス放電灯 |
US5461279A (en) * | 1992-09-10 | 1995-10-24 | Sanyo Electric Co. Ltd. | Flat fluorescent lamp having a luminescent surface with a diffusion groove |
US5346863A (en) * | 1992-12-11 | 1994-09-13 | Nippon Electric Glass Co., Ltd. | Low temperature sealing composition |
JPH07235283A (ja) * | 1994-02-22 | 1995-09-05 | Stanley Electric Co Ltd | 平面蛍光ランプのゲッター封着方法および同方法によるゲッターを具備する平面蛍光ランプ |
JP3484226B2 (ja) | 1994-06-10 | 2004-01-06 | 三菱電機株式会社 | 平面型放電発光素子 |
JPH08185802A (ja) * | 1994-12-28 | 1996-07-16 | Noritake Co Ltd | 放電表示装置 |
US5534469A (en) * | 1995-09-12 | 1996-07-09 | Nippon Electric Glass Co., Ltd. | Low temperature non-crystallizing sealing glass |
US5697825A (en) * | 1995-09-29 | 1997-12-16 | Micron Display Technology, Inc. | Method for evacuating and sealing field emission displays |
US5807154A (en) * | 1995-12-21 | 1998-09-15 | Micron Display Technology, Inc. | Process for aligning and sealing field emission displays |
US5733828A (en) * | 1996-02-15 | 1998-03-31 | Asahi Glass Company Ltd. | Hermetic sealing composition |
US5720640A (en) | 1996-02-15 | 1998-02-24 | Industrial Technology Research Institute | Invisible spacers for field emission displays |
US5827102A (en) * | 1996-05-13 | 1998-10-27 | Micron Technology, Inc. | Low temperature method for evacuating and sealing field emission displays |
US5820435A (en) * | 1996-12-12 | 1998-10-13 | Candescent Technologies Corporation | Gap jumping to seal structure including tacking of structure |
DE19711892A1 (de) * | 1997-03-21 | 1998-09-24 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Flachstrahler |
FR2761523B1 (fr) * | 1997-03-28 | 1999-06-04 | Pixtech Sa | Pose d'espaceurs dans un ecran plat de visualisation |
US6129603A (en) * | 1997-06-24 | 2000-10-10 | Candescent Technologies Corporation | Low temperature glass frit sealing for thin computer displays |
US6030267A (en) * | 1999-02-19 | 2000-02-29 | Micron Technology, Inc. | Alignment method for field emission and plasma displays |
-
1998
- 1998-04-20 DE DE19817478A patent/DE19817478B4/de not_active Expired - Fee Related
-
1999
- 1999-04-09 KR KR10-2000-7011652A patent/KR100415703B1/ko not_active IP Right Cessation
- 1999-04-09 WO PCT/DE1999/001089 patent/WO1999054913A1/de active IP Right Grant
- 1999-04-09 CA CA002329086A patent/CA2329086A1/en not_active Abandoned
- 1999-04-09 JP JP2000545176A patent/JP2003522369A/ja active Pending
- 1999-04-09 EP EP99945731A patent/EP1080483B1/de not_active Expired - Lifetime
- 1999-04-09 DE DE59902763T patent/DE59902763D1/de not_active Expired - Fee Related
- 1999-04-09 US US09/673,082 patent/US6659828B1/en not_active Expired - Lifetime
- 1999-04-19 TW TW088106224A patent/TW434642B/zh not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO9954913A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999054913A1 (de) | 1999-10-28 |
TW434642B (en) | 2001-05-16 |
DE19817478B4 (de) | 2004-03-18 |
KR20010042876A (ko) | 2001-05-25 |
JP2003522369A (ja) | 2003-07-22 |
EP1080483B1 (de) | 2002-09-18 |
KR100415703B1 (ko) | 2004-01-24 |
US6659828B1 (en) | 2003-12-09 |
DE59902763D1 (de) | 2002-10-24 |
CA2329086A1 (en) | 1999-10-28 |
DE19817478A1 (de) | 1999-11-04 |
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