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
  • 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
• • 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
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
  • A61L2/02—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using physical processes
  • A61L2/08—Radiation
  • A61L2/10—Ultraviolet [UV] radiation
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
  • A61L9/18—Radiation
  • A61L9/20—Ultraviolet radiation
  • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
• • 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
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/02—Details
  • H01J61/30—Vessels; Containers
  • H01J61/305—Flat vessels or containers
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/30—Treatment of water, waste water, or sewage by irradiation
  • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
  • C02F2103/42—Nature of the water, waste water, sewage or sludge to be treated from bathing facilities, e.g. swimming pools

Definitions

• the present invention relates to the field of UV flat lamps (UV for ultraviolet) and in particular relates to flat UV discharge lamps and the uses of such UV lamps and its manufacture.
• UV lamps are formed by fluorescent tubes
• UV filled with mercury and arranged side by side to form an emitting surface. These tubes have a limited life. In addition, the homogeneity of the emitted UV radiation is difficult to obtain for large areas.
• first and second planar walls made of sapphire or quartz, held substantially parallel and sealed together, thus delimiting an internal space filled with a source gas of the UV radiation,
• two electrodes in the form of metal grids integrated in the quartz or on the external main faces of the first and second planar walls and at distinct given potentials for a perpendicular discharge between the walls.
• US4983881 discloses a similar UV flat lamp with phosphor coatings on the inner major faces of the first and second dielectric walls, the phosphor emitting said UV radiation being excited by the plasma gas.
• the invention proposes a flat discharge lamp transmitting a radiation in the ultraviolet, said UV, comprising:
• first and second electrodes at distinct given potentials for a perpendicular discharge between the walls
• the at least one first electrode being a discontinuous layer thus arranged to allow an overall (optimal) transmission of the UV
• the flat discharge lamp according to the invention is simpler to manufacture and gives access in particular to opaque materials to make the first electrode and preferably the second electrode.
• the use of a discontinuous layer makes it possible to adjust even to improve the threshold of transmission in particular to reinforce the homogeneity.
• the first electrode (and preferably the second electrode) may be discontinuous by forming discrete (spaced apart) electrode regions and / or by being an electroconductive layer with non-layered (insulating) regions. It is possible to form a one-dimensional or two-dimensional network of electrode zones (row (s) of rows, bands, grid, etc.).
• the UV lamp according to the invention can take dimensions of the order of those currently achieved with fluorescent tubes, or greater, for example of at least 1 m 2 .
• the transmission factor of the lamp according to the invention around the peak of said UV radiation may be greater than or equal to at 50%, even more preferably greater than or equal to 70%, and even greater than or equal to 80%.
• the lamp must be hermetic, the peripheral seal may be made in different ways: - by a seal (polymeric, silicone type, or mineral, type sintered glass),
• a peripheral frame bonded to the walls (by gluing or any other means, for example a film based on glass frit), for example made of glass.
• the frame may optionally be used as a spacer, replace one or more spacers.
• the dielectric walls serve as capacitive protection of the electrodes against ion bombardment.
• Each electrode can be associated with the outer face of the dielectric wall in different ways: it can directly deposited on the outer face (preferred solution for the first electrode) or be on a dielectric carrier element, which is assembled to the wall of so that the electrode is pressed against its outer face.
• This dielectric carrier element which is preferably thin, may be a plastic film, in particular a lamination interlayer with a counter-glass for mechanical protection, or a dielectric sheet, for example glued by a resin or an inorganic seal, preferably at the periphery for passing through. UV where appropriate.
• Suitable plastics are, for example: polyurethane (PU) used as flexible, ethylene / vinyl acetate copolymer (EVA) or polyvinyl butyral (PVB), these plastics serving as laminating interlayer, for example with a thickness between 0.2 mm and 1.1 mm, in particular between 0.3 and 0.7 mm, optionally carrying an electrode (preferably the second electrode),
• PU polyurethane
• EVA ethylene / vinyl acetate copolymer
• PVB polyvinyl butyral
• rigid polyurethane polycarbonates and acrylates, such as polymethyl methacrylate (PMMA), used in particular as a rigid plastic, optionally carrying an electrode (preferably the second electrode).
• PMMA polymethyl methacrylate
• PE polyethylene terephthalate
• PET polyethylene terephthalate
• any added dielectric element is chosen to transmit said UV radiation if it is disposed on one emitter side of the UV lamp.
• UV radiation can be transmitted from one side only: the first wall.
• a second electrode forming a UV-reflective solid layer and / or a second UV-absorbing dielectric wall and preferably with a coefficient of expansion close to the first wall.
• any type of electrode material for example a wire or interlayer electrode in a lamination of the second wall with a counter glass or a rigid plastic.
• the UV radiation may be bidirectional, of the same intensity or intensity distinct from both sides of the lamp.
• the first (and preferably the second electrode chosen as a layer) can preferably be deposited
• a discontinuous protective layer for example dielectric
• a functional sub-layer for example dielectric, barrier, hooking, etc.
• a functional sub-layer may be provided under the electrode layer, and preferably discontinuous and in a manner analogous to the electrode layer.
• the discontinuities of the layer II can be in particular a very thin layer of gold, for example of the order of 10 nm, or of alkali metals such as potassium, rubidium, cesium, lithium or potassium for example from 0.1 to 1 micron, or be an alloy for example with 25% sodium and 75% potassium.
• alkali metals such as potassium, rubidium, cesium, lithium or potassium for example from 0.1 to 1 micron, or be an alloy for example with 25% sodium and 75% potassium.
• the electrode material is not necessarily sufficiently transparent to UV.
• An electrode material (first and preferably second electrode) relatively opaque to said UV radiation is, for example: - fluorine-doped tin oxide (SnO 2 : F), or antimony, zinc doped or alloyed with at least one of the following: aluminum, gallium, indium, boron, tin (for example ZnO: Al, ZnO: Ga, ZnO: In, ZnO: B, ZnSnO),
• indium oxide doped or alloyed in particular with zinc (IZO), gallium and zinc (IGZO), tin (ITO), the conductive oxides are for example deposited under vacuum,
• - a metal silver, copper or aluminum, molybdenum gold, tungsten, titanium, nickel, chromium, platinum
• the layer forming first and preferably second electrode may be deposited by any known means of deposition, such as liquid deposits, vacuum deposition (especially magnetron sputtering, evaporation), pyrolysis (powder or gaseous route) or by screen printing, by ink jet by scraping or more generally by printing.
• deposition such as liquid deposits, vacuum deposition (especially magnetron sputtering, evaporation), pyrolysis (powder or gaseous route) or by screen printing, by ink jet by scraping or more generally by printing.
• An electrode material (first electrode and preferably second electrode) relatively opaque to said UV radiation is for example based on metal particles or conductive oxides, for example those already mentioned),
• the (nano) particles are preferably in a binder.
• the resistivity is adjusted for the concentration of (nano) particles in a binder.
• the binder can be optionally organic, for example acrylic resins, epoxy, polyurethane, or be developed by sol-gel (mineral, or inorganic organic hybrid ).
• the (nano) particles can be deposited from a dispersion in a solvent (alcohol, ketone, water, glycol, etc.).
• a solvent alcohol, ketone, water, glycol, etc.
• Commercial products based on particles that can be used to form the first and / or second electrode are the products sold by Sumitomo Metal Mining Co. Ltd.
• the desired resistivity is adjusted according to the formulation.
• Particles are also available from Cabot Corporation of USA (e.g. Product No. AG-D-G-100-Sl), or "Harima Chemicals, Inc.” from Japan (NP Series).
• the particles and / or the binder are essentially mineral.
• the first electrode and preferably for the second electrode (especially if bidirectional radiation is desired), one chooses:
• a screen printing paste in particular:
• a paste loaded with (nano) particles (as already mentioned, preferably with silver and / or gold): a conductive enamel (a silver-glass frit), an ink, a paste conductive organic (polymer matrix), PSS-PEDOT (from Bayer, Agfa) and polyaniline,
• the first electrode (and the second electrode) is essentially mineral.
• the arrangement of the first electrode (and preferably the second electrode if appropriate) can be obtained directly by deposition (s) of electroconductive material (s) in order to reduce manufacturing costs. This avoids poststructures, for example dry and / or wet etchings, often using lithography processes (exposure of a resin to radiation and development).
• This direct network arrangement can be obtained directly by one or more appropriate deposition methods, preferably a liquid deposit, by printing, in particular planar or rotary, for example by using an ink pad, or by ink jet ( with a suitable nozzle), by screen printing ("screen or silk printing” in English), by simple scraping.
• the first and / or second electrode can thus be mainly in the form of a series of equidistant bands, which can be connected by a particularly peripheral band for a common power supply.
• the strips may be linear, or be of more complex shapes, non-linear, for example bent, V-shaped, corrugated, zigzag.
• the strips may be linear substantially parallel, having a width 11 and being spaced apart by a distance dl, the ratio 11 on d1 being between 10% and 50%, to allow a overall UV transmission of at least 50%, the ratio ll / dl can also be adjusted according to the transmission of the associated wall.
• first and / or second electrode may be at least two sets of crossed strips (or lines), for example organized in fabric, canvas, grid.
• the same band size and spacing between adjacent bands is chosen.
• each band can be full or open structure.
• the solid strips may in particular be formed from contiguous conducting wires (parallel or braided, etc.) or from a ribbon (made of copper, to be glued, etc.).
• the solid strips may be from a coating deposited by any means known to those skilled in the art such as liquid deposits, vacuum deposits (magnetron sputtering, evaporation), by pyrolysis (powder or gas route) or by serigraphy.
• Each open-structure band may also be formed of one or more series of conductive patterns forming a network.
• the pattern is in particular geometric elongated or not (square, round, etc.).
• Each series of patterns may be defined by equidistant patterns, with a given pitch said pi between adjacent patterns and a width called 12 patterns. Two sets of patterns can be crossed. This network can be organized in particular as a grid, as a fabric, a canvas. These patterns are for example metal such as tungsten, copper or nickel.
• Each open-structure strip may be based on conductive wires (for the second electrode) and / or conductive tracks.
• the ratio of width 12 to pitch pi may preferably be less than or equal to 50%, preferably less than or equal to 10%, even more preferably less than or equal to 1%.
• the pitch pi may be between 5 ⁇ m and 2 cm, preferably between 50 ⁇ m and 1.5 cm, even more preferably 100 ⁇ m and 1 cm, and the width 12 may be between 1 ⁇ m and 1 mm, preferably between 10 and 50 microns.
• a network of conductive tracks can be used
• a network of conducting wires for the second electrode may have a pitch pi between 1 and 10 mm, especially 3 mm, and a width 12 between 10 and 50 microns, especially between 20 and 30 microns.
• the wires may be integrated at least partly in the second dielectric wall associated, or alternatively at least partially integrated in a lamination interlayer, in particular PVB or PU.
• the gas When the gas is UV source then in order to change UV, the gas must be replaced and it is then necessary to adapt the conditions of discharge and UV emission (pressure, supply voltage, gas height, etc.) accordingly. If one chooses the phosphor coating (s) according to the UV or UV that one wishes to produce, independently of the conditions of discharge. It is also not necessary to change excitatory gas.
• luminophores emitting in the UVCs from a VUV radiation for example produced by one or more rare gases (Xe, Ar, Kr, etc.).
• VUV radiation for example, UV radiation at 250 nm is emitted by phosphors after excitation by VUV radiation of less than 200 nm.
• Mention may be made of materials doped with Pr or Pb such as: LaPO 4 : Pr, CaSO 4 : Pb etc.
• UVB also from VUV radiation.
• gadolinium doped materials such as YBO 3 : Gd; YB 2 O 5 : Gd; LaP 3 O 9 : Gd; the
• UVA-emitting phosphors from UVB or UVC radiation for example produced by mercury or preferably gas (s) such as rare and / or halogenated gases (Hg, Xe / Br, Xe / I, Xe / F, Cl 2 ,).
• gas (s) such as rare and / or halogenated gases
• Hg, Xe / Br, Xe / I, Xe / F, Cl 2 halogenated gases
• LaPO 4 Ce
• BaSi 2 O 5 the YPO 4
• This Ba, Sr, Mg) 3 Si 2 O 7 : Pb
• SrB 4 O 7 Eu.
• the gas may consist of a gas or a mixture of gases chosen from rare gases and / or halogens.
• the level of halogen (mixed with one or more rare gases) may be chosen less than 10%, for example 4%.
• Halogenated compounds can also be used.
• Rare gases and halogens have the advantage of being insensitive to climatic conditions. Table 1 below indicates the radiation peaks of the UV emitting gas emitting UV and / or exciters of the phosphors.
• the first and second electrodes may extend over surfaces of dimensions at least substantially equal to the surface of the walls inscribed in the internal space.
• first and second dielectric walls may be of identical materials or at least close expansion coefficient.
• the material transmitting said UV radiation from the first or second dielectric wall may preferably be chosen from quartz, silica, magnesium fluoride (MgF 2 ) or calcium fluoride (CaF 2 ), a borosilicate glass, a silicosodocalcic glass in particular with less
• magnesium or calcium fluorides transmit more than 80% or even 90% over the entire range of UVs that is to say UVA (between 315 and 380 nm) ), UVB (between 280 and 315 nm), UVC
• borosilicate glass such as Schott borofloat, transmits more than 70% over the entire range of UVAs, silicosodocalcic glasses with less than 0.05% Fe III or Fe 2 Cb, in particular Saint Diamond glass.
• -Gobain Pilkington Optiwhite glass, Schott B270 glass, transmit more than 70% or even 80% over the entire range of UVA.
• a soda-lime glass such as Planilux glass sold by Saint-Gobain, has a transmission greater than 80% beyond 360 nm, which may be sufficient for certain embodiments and applications.
• the gas pressure in the internal space can be of the order of 0.05 to 1 bar.
• the dielectric walls can be of any shape: the contour of the walls can be polygonal, concave or convex, in particular square or rectangular, or curved, in particular round or oval.
• the dielectric walls may be slightly curved according to the same radius of curvature, and are preferably maintained at a constant distance, for example by a spacer (for example peripheral frame) or spacers (punctual etc.) at the periphery or preferably distributed (regularly, uniformly ) in the internal space.
• a spacer for example peripheral frame
• spacers punctual etc.
• it is glass beads.
• These spacers which may be described as punctual when their dimensions are considerably smaller than the dimensions of the glass walls, may affect various shapes, including spherical, spherical bi-truncated parallel faces, cylindrical, but also parallelepiped polygonal section, including in cross, as described in WO 99/56302.
• the spacing between the two dielectric walls can be fixed by the spacers to a value of the order of 0.3 to 5 mm.
• a technique for depositing spacers in vacuum insulating glass units is known from
• glue dots in particular enamel deposited by screen printing, of a diameter, are deposited on a glass plate. less than or equal to the diameter of the spacers, the spacers are rolled on the glass plate preferably inclined so that a single spacer is glued on each point of glue. The second glass plate is then applied to the spacers and the peripheral seal is deposited.
• the spacers are made of a non-conductive material to not participate in discharges or short circuit. Preferably, they are made of glass, in particular of soda-lime type. To avoid a loss of light by absorption in the material of the spacers, it is possible to coat the surface of the spacers with a transparent or UV reflective material or with a phosphor material identical to or different from that used for the wall (s) ( s).
• the UV lamp can be produced by first producing a sealed enclosure where the intermediate air gap is at atmospheric pressure, then evacuating and introducing the plasma gas to the desired pressure.
• one of the walls comprises at least one hole pierced in its thickness obstructed by a sealing means.
• the UV lamp may have a total thickness less than or equal to 30 mm, preferably less than or equal to 20 mm.
• the walls are sealed by a peripheral sealing gasket which is inorganic, for example based on glass frit.
• the first electrode may be at a potential lower than the second electrode, especially in a configuration with an emitter side, the second electrode may then be protected by dielectric.
• the first electrode may be at a potential less than or equal to
• 400 V (typically peak voltage), preferably less than or equal to 220 V, still more preferably less than or equal to 110 V and / or at a frequency f is less than or equal to 100 Hz, preferably less than or equal to 60 and again more preferably less than or equal to 50 Hz.
• Vl is preferably less than or equal to 220 V and the frequency f is preferably less than or equal to 50 Hz.
• the first electrode may preferably be grounded.
• the supply of the UV lamp can be alternative, periodic, especially sinusoidal, impulse, square (square etc.).
• the UV lamp as described above can be used both in the industrial field for example for aesthetics, electronics or for food or in the domestic field, for example for the decontamination of tap water, water Pool drinking, air, UV drying, polymerization.
• the UV lamp as described above can be used:
• tanning lamp in particular 99.3% in the UVA and 0.7% in the UVB according to the standards in force
• a tanning booth in particular integrated in a tanning booth
• photochemical activation processes for example for a polymerization, in particular of glues, or a crosslinking or for the drying of paper,
• the lamp serves to promote the formation of vitamin D on the skin.
• the UV lamp as described above can be used for the disinfection / sterilization of air, water or surfaces by germicidal effect, especially between 250 nm and 260 nm.
• the UV lamp as described above is used in particular for the treatment of surfaces, in particular before deposition of active layers for electronics, computing, optics, semiconductors, ...
• the lamp can be integrated for example in household appliances such as refrigerator, kitchen shelf.
• the subject of the invention is also the UV lamp manufacturing method, in particular of the type described above, in which a discontinuous electrode (first electrode and / or second electrode) is formed for global UV transmission directly by deposit.
• a discontinuous electrode first electrode and / or second electrode
• by liquid on the main face of a dielectric wall is formed by the arrangement of the directly by liquid deposition on the outer face (coated with a layer or not) of the first wall is particularly preferred a technique printing, (flexography, pad printing, roll ..) and in particular screen printing or inkjet.
• a peripheral electrical supply zone of the electrodes is generally formed.
• This zone for example forming a strip is called "bus bar", and itself connected, for example by brazing or welding to a supply means (via a foil, a wire, a cable ..).
• This area may extend along one or more sides.
• This power supply zone can be screen printed, in particular enamel with silver.
• At least one peripheral power supply zone of the discontinuous electrode during the step of depositing said electrode by screen printing (preferably of a conductive enamel) or even by ink jet.
• This method of manufacturing the UV electrode is suitable for the UV lamp as described above or for a lamp
• FIG. 1 shows a flat UV 1 discharge lamp comprising first and second plates 2, 3, for example rectangular, each having an outer face 21, 31 and an inner face 22, 32.
• the lamp 1 emits a bidirectional UV radiation by its outer faces 21, 31.
• the surface of each plate 2, 3 is for example of the order of Im 2 or beyond and their thickness of 3 mm.
• the plates 2, 3 are associated with facing their internal faces 22, 32 and are assembled by means of a peripheral seal delimiting the internal space, here by a sealing frit 8, for example a glass frit thermal expansion coefficient close to that of the plates 2, 3.
• a sealing frit 8 for example a glass frit thermal expansion coefficient close to that of the plates 2, 3.
• the plates are assembled by an adhesive for example silicone (forming a seal) or by a heat-sealed glass frame. These sealing methods are preferable if plates 2, 3 are chosen with coefficients of expansion that are too distinct.
• the spacing between the plates is imposed (at a value generally less than 5 mm) by glass spacers 9 arranged between the plates.
• the spacing is for example 1 to 2 mm.
• the spacers 9 may have a spherical shape, cylindrical, cubic or other polygonal cross-section for example cruciform.
• the spacers may be coated, at least on their side surface exposed to the plasma gas atmosphere, with a UV reflective material.
• the first plate 2 has near the periphery a hole 13 pierced in its thickness, a few millimeters in diameter, the outer orifice is obstructed by a sealing pad 12, in particular copper welded to the outer face 21.
• the lamp 1 serves for example as a tanning lamp.
• the internal faces 22, 32 carry a coating 6 of luminophor material emitting radiation in the UVA preferably above 350 nm such as YPO 4 : Ce (peak at 357 nm) or (Ba, Sr, Mg) 3 If 2 0 7 : Pb (peak at 372 nm) or SrB 4 O 7 : Eu (peak at 386 nm).
• a soda-lime glass such as the Planilux sold by the Saint-Gobain company is chosen which ensures a UVA transmission around 350 nm greater than 80% at low cost. Its coefficient of expansion is about 90 10 -8 K -1 .
• a gadolinium-based phosphor and a borosilicate glass (for example with an expansion coefficient of about 32 ⁇ 10 -8 K -1 ) or a silicodio-calcium glass with less than 0.05% Fe 2 are chosen.
• O 3 and a rare gas such as xenon alone or mixed with argon and / or neon.
• the lamp 1 emits in the UVC, for a germicidal effect, then a luminophore is chosen such as LaPO 4 : Pr or CaSO 4 : Pb and for the walls, silica or quartz as well as a rare gas such as xenon, preferably alone or mixed with argon and / or neon.
• a luminophore such as LaPO 4 : Pr or CaSO 4 : Pb and for the walls, silica or quartz as well as a rare gas such as xenon, preferably alone or mixed with argon and / or neon.
• the first electrode 4 is on the outer face 21 of the first wall 2 (always transmitting side).
• the second electrode 5 is on the outer face 31 of the second wall 3 (possibly emitter side).
• Each electrode 4, 5 is in the form of a discontinuous layer at a single potential.
• Each electrode 4, 5 is in the form of at least one series or even two crossed series of strips 41, 51, for example solid strips.
• the strips 41, 51 are of width 11 and of similar interband spacings d1.
• the material of the first electrode (at least) is relatively opaque to UV, the band width ratio 11 is then adapted to the width of the interband space d1 accordingly to increase the overall UV transmission (for each series).
• a ratio of width 11 to width d1 of the interband space of the order of 20% or less is chosen, for example the width 11 is equal to 4 mm and the width d1 of the interelectrode space is equal to 2 cm.
• the electrode material 4, 5 is for example silver preferably deposited by screen printing: for example a silver enamel or an ink with nanoparticles of silver and / or gold.
• the electrode material may alternatively be deposited in a thin layer by spraying and then etched.
• Planilux glasses can also be chosen for the walls, each having a fluorine-doped tin oxide layer which is etched to form the electrodes 4, 5 with a width equal to 1 mm and a gap equal to 5 mm to obtain an overall transmission of about 85% from
• each strip has an open structure (for example 15 to 50 ⁇ m wide and spaced apart by 500 ⁇ m and is screen printed) and may for example be formed of a network of conductive patterns, for example geometric (square, round , ... lines, grid), to further increase the overall UV transmission.
• the electrodes 4, 5 are discontinuous layers extending on the faces and arranged in a grid, for example with a track width of between 15 and 50 ⁇ m and spaced apart by 500 ⁇ m, made by screen printing.
• a track width of between 15 and 50 ⁇ m and spaced apart by 500 ⁇ m, made by screen printing.
• InkTec Nano Silver Paste Inks TEC PA 030 TM ink is selected or a glass frit made of silver is screen printed.
• the second electrode 5 is a full aluminum layer forming a UV mirror.
• the second electrode 5 is a grid integrated in the wall 3 or embedded in an EVA or PVB interlayer type of lamination with a counter glass.
• Each of the electrodes 4, 5 is fed via a flexible foil 11, 11 'or alternatively via a welded wire.
• the first electrode 4 is at a VO potential of the order of 1100 V and of frequency between 10 and 100 kHz, for example 40 kHz.
• the second electrode 5 is grounded.
• the electrodes 4 and 5 are fed for example by signals in phase opposition, for example respectively at 550 V and -550 V.
• the first electrode is preferably grounded and the second electrode is powered by the high frequency signal when only one side is emitter. Indeed, the second electrode can be protected.
• the first electrode 4 may be in electrical connection with a current supply band (commonly called “bus bar”) which covers the crossed strips 51 (or the gate in the variant), at the periphery of at least one edge (for example). longitudinal example) of the first wall 2 and on which is welded a wire or a foil.
• the second electrode 5 may be in electrical connection with a current supply strip (commonly called “bus bar”) which covers the crossed strips (or the grid in the variant), at the periphery of at least one edge (for example longitudinal) of the second wall and on which is welded a wire or a foil.
• These strips can be enameled with silkscreened silver or be deposited by ink jet, in particular at the same time as the electrodes (thus providing a solid peripheral band and sufficiently wide).

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• Vessels And Coating Films For Discharge Lamps (AREA)
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• 2007
  • 2007-04-17 FR FR0754533A patent/FR2915314B1/fr not_active Expired - Fee Related
• 2008
  • 2008-04-17 JP JP2010503565A patent/JP2010525509A/ja active Pending
  • 2008-04-17 KR KR1020097023979A patent/KR20100036228A/ko not_active Withdrawn
  • 2008-04-17 CN CN200880020647A patent/CN101681797A/zh active Pending
  • 2008-04-17 US US12/596,305 patent/US20100253207A1/en not_active Abandoned
  • 2008-04-17 EP EP08788198A patent/EP2147460A2/de not_active Withdrawn
  • 2008-04-17 WO PCT/FR2008/050694 patent/WO2008145908A2/fr not_active Ceased
  • 2008-04-17 CA CA002684180A patent/CA2684180A1/fr not_active Abandoned

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