EP1490892B1 - Lampe a decharge con ue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee - Google Patents

Lampe a decharge con ue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee Download PDF

Info

Publication number
EP1490892B1
EP1490892B1 EP03717123A EP03717123A EP1490892B1 EP 1490892 B1 EP1490892 B1 EP 1490892B1 EP 03717123 A EP03717123 A EP 03717123A EP 03717123 A EP03717123 A EP 03717123A EP 1490892 B1 EP1490892 B1 EP 1490892B1
Authority
EP
European Patent Office
Prior art keywords
discharge
discharge lamp
top plate
lamp according
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03717123A
Other languages
German (de)
English (en)
Other versions
EP1490892A1 (fr
Inventor
Lothar Hitzschke
Frank Vollkommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1490892A1 publication Critical patent/EP1490892A1/fr
Application granted granted Critical
Publication of EP1490892B1 publication Critical patent/EP1490892B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • H01J61/33—Special shape of cross-section, e.g. for producing cool spot
    • 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 present invention relates to discharge lamps designed for dielectrically impeded discharges, also referred to as silent discharge lamps or dielectric barrier discharge lamps.
  • Such discharge lamps have an electrode set for generating discharges in a discharge medium, which is located in a discharge space of the lamp. Between at least a part of the electrode set and the discharge medium, a dielectric layer is provided which forms the dielectric barrier.
  • the electrodes operate as cathodes or anodes, at least the anodes are dielectrically separated from the discharge medium.
  • lamps are state of the art and have recently received increased attention, mainly because of pulsed operation ( US 5 604 410 ) can achieve relatively high efficiencies, which make use as a source of visible light or as a UV emitter for various applications appear attractive.
  • lamps are of interest, in which the discharge space is between two generally plane-parallel plates, which are referred to below as the bottom plate and as a ceiling plate. It is at least the ceiling plate at least partially translucent, of course, they can wear on their side facing the discharge space a phosphor layer that is not transparent in the strict sense itself.
  • Such lamps with a plate-like structure are especially interesting as flat discharge lamps, for example for backlighting purposes in displays, monitors and the like.
  • support elements can be used between the bottom plate and the top plate, which are located within the discharge space and connect the bottom plate and the top plate together.
  • the plates can be connected via a frame closing off the discharge space, which is not referred to here as a support element.
  • the support elements shorten the bending length between the outer edges of the plates, in the area of which the described frame can be provided, and thus improve the stability of the lamp against bending and pressure loads. It is also to be considered that silent discharge lamps are often filled with a discharge medium with negative pressure, so that a generally larger part of the external atmospheric pressure rests on the plates.
  • the font WO 02/27761 A which falls under the state of the art according to Article 54 (3) EPC, discloses a flat discharge lamp with dielectrically impeded electrodes and supporting projections as an integral part of the ceiling plate for support from the bottom plate.
  • the support projections are designed as a one-dimensional rib structure.
  • the invention is based on the problem to provide a silent discharge lamp of the type described with an improved construction.
  • the invention provides: a discharge lamp having a bottom plate, a ceiling plate for the light exit, which is at least partially translucent, a discharge space between the bottom and the top plate for receiving a discharge medium, an electrode set for generating dielectrically impeded discharges in the discharge medium and a dielectric layer between at least one
  • the discharge space facing surface of the ceiling plate has a corrugated structure, wherein each of the bottom plate facing extremities of the waveform support projections for supporting the ceiling plate against the bottom plate form such that the ceiling plate of a support projection from in all directions of the ceiling plate lifts from the bottom plate and wherein in two mutually non-parallel and on the ceiling slab total vertical sectional planes wavy lines of the surface result, which, if in response to a parameter x a to the ceiling plate altogether parallel x-axis in the respective section plane are called f (x), satisfy the condition: Max ( ( f ' ( x + s ) - f x ) / s ) ⁇ s ⁇ Max ⁇ f ( x + s ) - f x / s where the sign Max denotes the magnitude maximum of the term in the respective parenthesis for all values x excluding the edge areas of the tile, f (x) is the
  • the invention relates to a display device with such a discharge lamp, so for example a flat screen, a display or the like.
  • the invention is therefore based on a discharge lamp assembly with a bottom plate and a cover plate, in which case the plate provided for the light exit is referred to as a ceiling plate.
  • the bottom plate may additionally be provided for a light exit, but will generally not be translucent.
  • the ceiling tile is not necessarily translucent throughout its extent.
  • the bottom plate and the ceiling plate are generally generally planar and plane-parallel, However, they can also deviate slightly from a flat shape, for example, be curved.
  • the invention is directed to a particular structure of the ceiling tile.
  • the ceiling plate has a surface facing the discharge space, which according to the invention should have a corrugated structure.
  • This corrugated structure has the task of providing the base plate facing extremities or protrusions of the waveform as supporting projections for supporting the ceiling plate against the bottom plate. At least a substantial part of these extremes or projections should therefore be supported against the bottom plate (directly or under certain circumstances also indirectly) or arranged at least in such close proximity to the bottom plate (or an element arranged thereon) that occurs in practice Bending movements in any case gives a support function.
  • the ceiling panel structure should be wavy in at least two directions lying in the ceiling panel plane (in the above sense) and not parallel to each other. It should therefore not be formed like a rib, because in fact there is no ripple in directions lying parallel to ribs. Rather, this ceiling panel should stand out from a support projection in all directions of the ceiling panel of the bottom plate.
  • the waviness in these directions refers to the surface of the ceiling plate facing the discharge space.
  • the surface facing away from the discharge space can thus be structured flat or otherwise.
  • the wavy structures of the discharge-chamber-side surface of the ceiling slab should be wavy in a manner which on the one hand is "roundish” and on the other hand, at least locally, has a certain steepness with respect to the ceiling slab level as a whole.
  • the "roundness" shall be expressed below by a difference quotient of the first derivative of a function f (x) formed over a finite distance s, which describes the shape of the discharge-space-side surface of the ceiling plate in one direction, ie as a line of intersection of the discharge-space-side surface of the ceiling plate with a total of the ceiling slab level cutting plane results.
  • This difference quotient is thus ( f ' ( x + s ) - f ' x ) / s . which can also be understood as mean value of the second derivative of the function f (x) formed over the distance s.
  • This difference quotient should not be too great according to the invention. In other words, not too small radii of curvature of the cut line should result over the averaging length s.
  • the above "roundness" criterion is intended for all x values apply, ie along the entire cutting line length. This is true at least for the typical and usually along the cut line repetitive structures. Of course, a few edges or spikes or defects may be tolerated depending on the individual requirements and their number and relevance.
  • the ceiling plate next to the support projections should not have too flat slopes, so that overall at limited distances between the support projections a sufficient discharge space height (meaning in the direction perpendicular to the ceiling slab level) results.
  • the first derivative of the already mentioned function f (x) should at least in places reach a certain amount.
  • This criterion is also detected with the described averaging length s, so that the difference quotient ( f ( x + s ) - f x ) / s is looked at.
  • these two criteria should be coordinated with one another, which is the case by the above inequality.
  • the magnitude maxima are used, wherein, as mentioned above, magnitude maxima are assumed in the context of at least substantially repetitive structures. The edge areas and their surroundings, as already mentioned, are omitted in these considerations.
  • the size s according to the invention has the value 2 mm.
  • the described criterion preferably also applies to smaller s-values of 1.9 mm, more preferably still 1.8 mm, even better 1.7 mm and particularly preferably 1.6 mm.
  • s should preferably make up at most twice the material thickness of the ceiling plate, if such a material thickness is defined. This is not the case with a corrugated discharge-chamber-side surface and a flat surface of the ceiling plate facing away from the discharge space, but with a generally corrugated ceiling plate of essentially constant material thickness. Namely, it constitutes a preferred aspect of the invention that the criteria for the function f (x) discussed above and below also apply to the surface of the ceiling plate facing away from the discharge space. However, this is an optional requirement.
  • the two maximum magnitudes mentioned should preferably fulfill absolute criteria in each case and be restricted not only in relation to one another.
  • Max ((f '(x + s) -f' (x)) / s) the preferred upper limits are 0.6 mm -1 , 0.45 mm -1 , 0.4 mm -1 and 0.35 mm -1 , which are increasingly preferred in this order.
  • the lower limits 0.1, 0.15, 0.20 are also preferred in this order.
  • cut lines show substantially periodic structures so that the above criteria can be related to the individual periods.
  • a particularly favorable form for the function f (x) is a sine function, which term includes all shifts of the sine function along the abscissa and the ordinate. The same holds true for arbitrary powers of such a sine function, whereby in the case of fractional powers an ordinate shift should be considered, which ensures consistently positive values of the sine function (for example, the square root is defined). So it also includes square sine functions and the like.
  • sine functions and functions derived from a sine function have in common that, at least in the case of non-extreme exponents, they have a favorable combination of a round and simultaneously sufficiently large amounts of the first derivative between the extrema.
  • the simplest case is, of course, a simple sine function.
  • the ceiling plate on the surface remote from the discharge space has the light-diffusing microscopic structures, that is to say is "rough". These structures should be significantly smaller than the parameter s.
  • the support elements are placed as separate glass balls between the plates, preferably the way to form the support elements as integrated components of the ceiling plate. So it's about to the bottom plate aligned projections of the ceiling plate, which are integral part of the ceiling plate.
  • the ceiling plate is already produced with these projections with a suitable molding process, for example deep-drawn or pressed.
  • the projections can also be subsequently formed. It is essential, however, that the ceiling plate in the assembly of the lamp integrally formed with her supporting projections.
  • the cost for the positioning and fixing of separate support elements between the plates should be omitted.
  • the invention is based on the idea that a one-piece design of spacers with the bottom plate, which results as a development of the first to be connected to the bottom plate conventional support balls is therefore unfavorable, because through the contact between the support elements and the plate shadow in the luminance distribution, which affect the homogeneity. It has been found that these shadows are the more pronounced, the smaller the distance between the shadow causing contacts to the light irradiation plane of the ceiling plate. Therefore, it is considered cheaper not to avoid such contacts, but as deep as possible, ie away from the light emitting side to arrange.
  • the shadows blur more strongly in the luminance distribution of the lamp, especially when on the top or above the ceiling plate or diffusers or other luminance homogenizing elements are used.
  • the support projections according to the invention When the support projections according to the invention are formed by the described wavy structure, they provide by refraction of incident light from the discharge space or by corresponding alignment of the radiation pattern of a phosphor layer on the outer surface for an alignment of light in the core region of the support projections. This can be counteracted by the shadow resulting from the contact with the base plate.
  • an optimization to a luminance which is as homogeneous as possible can be carried out.
  • the individual discharge structures typically do not burn below, but between support projections.
  • the maximums of UV generation are also between the support projections. Due to the optical deflection effect, the light can be brought partially from these areas in the areas of the support projections, so that there is a relatively homogeneous luminance at the top of the ceiling plate.
  • the basic idea of the invention at this point, deviating from the prior art, is not to regard the supporting projections as disruptions of the luminance of the discharge structure to be homogenized separately. Rather, the support projections in the invention preferably take an active role in the light distribution and are taken into account in the overall design as well as the also inhomogeneous discharge distribution.
  • the embodiment makes the here-addressed aspect of the invention clearer.
  • the support projections between the bottom plate and the ceiling plate are provided as a plurality.
  • the invention additionally differs from the prior art, in which it was attempted to use the smallest possible number of support elements.
  • the inventors have verified that comparatively thin floor and ceiling panels can be used with correspondingly frequent support, so that a considerable weight saving can be realized for the overall lamp.
  • the total weight of the lamp is of considerable importance for many applications.
  • the assembly process and possibly required automatic assembly devices can be significantly simplified and cheapened for lighter panels.
  • with a greater number of supporting projections also improved stability can be achieved.
  • the process times shorten in the production, because thinner plate materials and thus smaller thermal capacitances occur.
  • the support projections should be arranged in an allocation to individual localized discharge areas in the discharge space.
  • the individual localized discharge structures were set up without the invention with the already mentioned pulsed operating method and could be fixed by creating preferential sites on the electrodes.
  • the invention is not limited to lamps having such preferred locations.
  • the conventional structures for example nose-like projections on the cathodes, can be weaker.
  • the invention also relates to this.
  • the association between support projections and individual discharge regions should be present at least to the extent that the individual discharge regions are each surrounded by identical patterns of adjacent support projections.
  • discharge areas in the edge region of the discharge lamp i. in the vicinity of the frame or lateral conclusion of the discharge vessel, except.
  • the comparatively large number of supporting projections does not play a detrimental role for the homogeneity (see above explanation of the overall design of the discharge lamp).
  • individual supporting projections may be adjacent to more than one discharge area, this will even be the rule.
  • the support projections prefferably be surrounded, if possible, in each case by the same pattern of next adjacent discharge regions.
  • the support projections and the discharge regions alternate along certain directions.
  • the alternating series does not have to be one immediately after another, alternating one after the other (according to the pattern ababab .).
  • a series in which two support projections or two discharge regions regularly occur successively, as long as each support projection and each discharge region has at least one discharge region or at least one support projection as a neighbor eg abbabbabb ... or aabbaabb .
  • They do not necessarily have to be strictly collinear in this direction of the alternate row, but may also be somewhat zigzag-shaped. This results in a total of a supporting projections and discharge areas alternately constructed surface pattern, such as a checkerboard arrangement.
  • strip-like Electrodes adjacent to a strip side adjacent discharge areas are each separated by support projections.
  • such discharge lamps are preferred, which are designed for bipolar operation, in which the electrodes thus act alternately as anodes and cathodes.
  • the electrodes thus act alternately as anodes and cathodes.
  • FIG. 1 shows a schematic plan view of a checkerboard pattern-like arrangement of supporting projections and single discharge areas.
  • the small circles denoted by 2 correspond to the round extremes of sinusoidal supporting projections facing downwards, ie towards the bottom plate 4, in the cross-sectional view (AA) in FIG Fig. 2a overhead ceiling plate 3.
  • FIG. 2a shows that the ceiling panel 3 along the line AA in FIG. 1 has a sinusoidal shape, which also occurs in other parallel sections through the respective extrema 2 and in orthogonal sections through the extrema 2 identical.
  • the lower "round tips" 2 of the sinusoidal mold contact the bottom plate 4, while the upper “round tips”, ie the maxima of the sinusoidal shape, rise above the highest regions of the discharge space 6.
  • the length dimensions are therefore considered in mm in this description. This results in a period length of 15 mm and a twice the amplitude corresponding clear height of the discharge space of 4 mm.
  • Both values correspond to about 0.34 mm -1 .
  • FIG. 2b is an enlarged and idealized section of the ceiling panel shown.
  • the ceiling plate 3 is a deep-drawn glass plate with a thickness of 0.8 mm.
  • the top of the ceiling plate 3 is therefore in the contour largely as the bottom shaped the ceiling plate 3. However, this is not absolutely necessary.
  • the top of the ceiling plate 3 could also be flat (or have different shapes). In addition to the aspects of the optical effect of the shape of the ceiling plate 3 are mainly criteria of cheap manufacturability to consider.
  • Fig. 1 Designated electrode strips in which there is no difference between anodes and cathodes, which are thus all separated by a dielectric layer of the discharge space 6 formed between the ceiling plate 3 and the bottom plate 4.
  • the electrode strips 5 have jagged or wave-like shapes composed of straight sections. Short sections of the electrode strips 5 between next adjacent support projections are inclined relative to the main strip direction and provide for a separation of the discharge areas, which in the Fig. 1 and 2 denoted by 7. If you omitted these sections, the discharge areas 7 would just touch. Between these inclined sections, the electrode strips in the region of the discharge regions 7 themselves form weak sawtooth forms, with the tip of the sawtooth in the middle in each case.
  • Electrodes shapes are important for the localization of individual discharges in the region of shortest discharge spacings, ie between corresponding projecting tips of the electrode strips 5.
  • a single discharge variable in its extent, and possibly also divided into a plurality of discharge structures, will burn in each discharge region 7.
  • both the support projections with the lower extrema 2 on the one hand and the discharge structures 7 on the other hand are each surrounded by the same nearest neighbor arrangements (the individual discharges or the support projections). Excluded are only arranged at the edge of the discharge lamps positions.
  • the electrode strips 5 shown here have a profile which, in addition to the local definition of the individual discharge structures, also has good properties with respect to the dimming of the discharges, including the two applications US 6,376,989 and WO 00/21116 is referenced.
  • the dimming function is accompanied by a change in the surface area of the individual discharge structures 7, so that they are also smaller than in Fig. 1 and 2a can be shown.
  • the support projections separate the discharge structures 7 arranged between the same electrode strips 5 from each other. Because of the separation function of the support projections, the serrated shape of the electrode strips 5 in this exemplary embodiment is also only comparatively small, in relation to the discharge distance, ie the distance between the electrode strips 5.
  • Fig. 3 shows one Fig. 1 corresponding top view of the bottom plate 4 with the set of electrodes 5.
  • a complete discharge lamp is shown in the 21 in Fig. 3 vertical and 15 in Fig. 3 horizontal lines each having alternating rows of support projections with lower extrema 2 and discharge structures 7 are provided.
  • the discharge structures 7 are not shown for clarity, however, sit in the operation of the discharge lamp as in Fig. 1 and 2a shown.
  • Fig. 3 shows Further, that the electrode strips 5 each one alternately in Fig. 3 right hunt group 10 and a in Fig. 3 left hunt group 11 are supplied to be connected together to an electronic ballast.
  • a frame-like structure 8 in the outer region of the bottom plate 4.
  • the "frame” 8 is also a projection of the ceiling plate 3, but not tapering to a point, but as a rib.
  • the contact surface of the frame rib 8 with the bottom plate 4 has a certain width, because there a gas-tight connection of the ceiling plate 3 and the bottom plate 4, for example by a glass solder, must be provided.
  • shadow effects in this area do not disturb, because it is anyway the edge at which the luminance is already decreasing.
  • the frame structure 8 is designed in its "height" so that the minima of the sinusoidal profile form from the FIGS. 2a and 2b each rest on the bottom plate 4 straight.
  • the glass solder thickness for fastening the frame structure 8 to the bottom plate 4 must therefore be taken into account in the design of the frame rib 8 relative to the only adjacent support projections. Due to the given during assembly deformability of the glass solder results in a precise adjustment automatically.
  • both the ceiling plate 3 and the bottom plate 4 are designed to be relatively thin-walled. Moreover, it is provided as in Fig. 3 illustrates not to use a separate frame between base plate 4 and ceiling plate 3.
  • the one-piece design of the support projections with the ceiling plate 3 thus results in a drastically reduced assembly costs and significantly reduced process times.
  • the ceiling plate 3 including the support projections is coated with phosphor, this results in that the radiation characteristics of the visible radiation are inclined so as to result in a lightening of the shadow caused by the contact with the base plate 4. It is thus directed light from the environment in the area above the center of the support projection.
  • optically effective structures such as roughening, may be provided on the upper side or above the ceiling plate 3. These optically active structures may preferably be integrated in the ceiling plate 3 or provided as a separate element.
  • each support projection 1, 2 receives light contributions from four, evenly distributed around it discharge structures 7 and The support projections 1, 2, apart from the edge of the discharge lamp, do not differ therein.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Electromagnetism (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (12)

  1. Lampe à décharge comportant
    - une plaque de fond (4),
    - une plaque de recouvrement (3) pour la sortie de la lumière, qui est transparente au moins en partie,
    - une chambre de décharge (6) entre la plaque de fond et la plaque de recouvrement pour recevoir un milieu de décharge,
    - un jeu d'électrodes (5) pour produire des décharges (7) entravées par voie diélectrique dans le milieu de décharge
    - et une couche diélectrique entre au moins une partie du jeu d'électrodes (5) et le milieu de décharge,
    caractérisée en ce que la surface - orientée vers la chambre de décharge (6) - de la plaque de recouvrement (3) a une structure ondulée, les extrêmes (2) respectifs - orientés vers la plaque de fond - de la forme ondulée formant des saillies d'appui pour soutenir la plaque de recouvrement (3) contre la plaque de fond (4) de telle manière que, à partir d'une saillie d'appui, la plaque de recouvrement se soulève de la plaque de fond (4) dans toutes les directions de la plaque de recouvrement,
    et des plans de coupe (A-A) non parallèles l'un à l'autre et globalement perpendiculaires sur la plaque de recouvrement (3), donnent des lignes d'intersection ondulées de la surface,
    qui satisfont à la condition suivante quand elles sont désignées par f(x) dans chaque plan de coupe en fonction d'un paramètre x d'un axe x globalement parallèle à la plaque de recouvrement (3) max ( ( fʹ ( x + s ) - fʹ x ) / s ) ⋅ s < Max ⁢ f ( x + s ) - f x / s ,
    Figure imgb0007
    où le signe max désigne respectivement une valeur maximale du terme dans chaque parenthèse pour toutes les valeurs x sans prendre en compte les zones de bord de la plaque de recouvrement (3),
    f'(x) la dérivée première de f(x) en fonction de x, les valeurs de x étant mesurées en mm,
    et s a pour valeur 2 mm.
  2. Lampe à décharge selon la revendication 1, pour laquelle la condition de la revendication 1 vaut aussi quand s a pour valeur 1,9 mm ou de préférence 1,8 mm ou 1,7 mm et de façon tout particulièrement recommandée 1,6 mm.
  3. Lampe à décharge selon la revendication 1 ou 2, pour laquelle max ((f' (x + s) - f' (x)) / s) est égal au plus à 0,6 mm-1, de préférence au plus 0,45 mm-1, encore mieux au plus à 0,4 mm-1 et de façon tout particulièrement recommandée au plus à 0, 35 mm-1
  4. Lampe à décharge selon l'une des revendications précédentes, pour laquelle max ((f(x + s) - f(x)) / s) est égal au moins à 0,1, de préférence au moins à 0,15, de façon tout particulièrement recommandée au moins à 0,20.
  5. Lampe à décharge selon l'une des revendications précédentes, pour laquelle s est égal au plus au double de l'épaisseur du matériau de la plaque de recouvrement (3).
  6. Lampe à décharge selon l'une des revendications précédentes, pour laquelle f(x) peut être représentée par une fonction sinusoïdale ou par une puissance rationnelle d'une fonction sinusoïdale.
  7. Lampe à décharge selon l'une des revendications précédentes, dans laquelle, quand les lignes d'intersection de la surface - éloignée de la chambre de décharge (6) - de la plaque de recouvrement (3) avec deux plans de coupe (A-A) non parallèles l'un à l'autre et globalement perpendiculaires à la plaque de recouvrement (3) sont désignées par f(x) en fonction d'un paramètre d'un axe x globalement parallèle à la plaque de recouvrement (3) dans chaque plan de coupe (A-A), les conditions de l'une des revendications précédentes sont aussi remplies pour ces lignes d'intersection f(x).
  8. Lampe à décharge selon l'une des revendications précédentes, dans laquelle, sur la surface éloignée de la chambre de décharge (6), la plaque de recouvrement (3) comporte des structures microscopiques pour diffuser la lumière émise.
  9. Lampe à décharge selon l'une des revendications précédentes, dans laquelle les surfaces de contact (2) entre les saillies d'appui et la plaque de fond (4) ont chacune une très petite étendue par rapport aux dimensions des saillies d'appui.
  10. Lampe à décharge selon la revendication 9, dans laquelle les saillies d'appui ne font que toucher la plaque de fond (4).
  11. Lampe à décharge selon l'une des revendications précédentes, dans laquelle les surfaces - orientées vers la chambre de décharge (6) - des saillies d'appui sont revêtues d'une substance fluorescente.
  12. Dispositif d'affichage équipé d'une lampe à décharge selon l'une des revendications précédentes, sur lequel la lampe à décharge sert à éclairer de l'arrière le dispositif d'affichage.
EP03717123A 2002-03-28 2003-03-03 Lampe a decharge con ue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee Expired - Lifetime EP1490892B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10214156 2002-03-28
DE10214156A DE10214156A1 (de) 2002-03-28 2002-03-28 Entladungslampe für dielektrisch behinderte Entladungen mit gewellter Deckenplattenstruktur
PCT/DE2003/000689 WO2003083898A1 (fr) 2002-03-28 2003-03-03 Lampe a decharge conçue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee

Publications (2)

Publication Number Publication Date
EP1490892A1 EP1490892A1 (fr) 2004-12-29
EP1490892B1 true EP1490892B1 (fr) 2008-05-07

Family

ID=27816061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03717123A Expired - Lifetime EP1490892B1 (fr) 2002-03-28 2003-03-03 Lampe a decharge con ue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee

Country Status (9)

Country Link
US (1) US6984932B2 (fr)
EP (1) EP1490892B1 (fr)
JP (1) JP2005521999A (fr)
KR (1) KR100932020B1 (fr)
CN (1) CN100543926C (fr)
CA (1) CA2445873A1 (fr)
DE (2) DE10214156A1 (fr)
TW (1) TWI283881B (fr)
WO (1) WO2003083898A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5244398B2 (ja) * 2005-01-07 2013-07-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ セグメント化された誘電バリア放電ランプ
FR2882423B1 (fr) 2005-02-22 2007-03-30 Saint Gobain Structure lumineuse plane ou sensiblement plane
EP2007845A1 (fr) * 2006-04-11 2008-12-31 Philips Intellectual Property & Standards GmbH Lampe à décharge comprenant une substance fluorescente aux uv
DE102006026333A1 (de) * 2006-06-02 2007-12-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe für dielektrisch behinderte Entladungen mit flachem Entladungsgefäß
DE102006026332A1 (de) * 2006-06-02 2007-12-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Entladungslampe für dielektrisch behinderte Entladungen mit rippenartigen Stützelementen zwischen Bodenplatte und Deckenplatte
WO2008072990A1 (fr) * 2006-12-15 2008-06-19 Nemes G Ion Structure pour émission de lumière fluorescente, et application de cette structure à la production de lampes fluorescentes
DE102014008200B4 (de) 2014-05-30 2018-03-15 Audi Ag Bedienelement für ein Kraftfahrzeug und Verfahren zum Herstellen einer Glasplatte für ein berührsensitives Bedienelement

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0495068A4 (en) * 1990-08-03 1992-11-19 Judd B. Lynn Thin configuration flat form vacuum-sealed envelope
DE4311197A1 (de) 1993-04-05 1994-10-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Verfahren zum Betreiben einer inkohärent strahlenden Lichtquelle
EP0926704A1 (fr) * 1997-12-23 1999-06-30 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampe plate à décharge à barrière diélectrique
DE19844720A1 (de) 1998-09-29 2000-04-06 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Dimmbare Entladungslampe für dielektrisch behinderte Entladungen
DE19845228A1 (de) 1998-10-01 2000-04-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Dimmbare Entladungslampe für dielektrisch behinderte Entladungen
US6379989B1 (en) * 1998-12-23 2002-04-30 Xerox Corporation Process for manufacture of microoptomechanical structures
DE10023504A1 (de) 2000-05-13 2001-11-15 Philips Corp Intellectual Pty Edelgas-Niederdruck-Entladungslampe, Verfahren zum Herstellen einer Edelgas-Niederdruck-Entladungslampe Lampe sowie Verwendung einer Gasentladungslampe
DE10048186A1 (de) * 2000-09-28 2002-04-11 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Entladungslampe für dielektrisch behinderte Entladungen mit Anordnung von Stützelementen
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

Also Published As

Publication number Publication date
DE50309779D1 (de) 2008-06-19
WO2003083898A1 (fr) 2003-10-09
EP1490892A1 (fr) 2004-12-29
TW200307308A (en) 2003-12-01
CA2445873A1 (fr) 2003-10-09
TWI283881B (en) 2007-07-11
US20040155571A1 (en) 2004-08-12
US6984932B2 (en) 2006-01-10
DE10214156A1 (de) 2003-10-09
JP2005521999A (ja) 2005-07-21
CN1585996A (zh) 2005-02-23
KR20040093371A (ko) 2004-11-05
KR100932020B1 (ko) 2009-12-15
CN100543926C (zh) 2009-09-23

Similar Documents

Publication Publication Date Title
EP1232518B1 (fr) Lampe a decharge pour decharges delimitees dielectriquement avec elements d&#39;appui places entre une plaque de fond et une plaque de couverture
EP1847859B1 (fr) Procédé pour la production d&#39;un dispositif d&#39;éclairage et dispositif d&#39;éclairage
EP0912990B1 (fr) Lampe a decharge dotee d&#39;electrodes inhibees dielectriquement
EP0839436B1 (fr) Procede permettant de faire fonctionner un systeme d&#39;eclairage et systeme d&#39;eclairage associe
EP1212781B1 (fr) Lampe a decharge pour decharges delimitees dielectriquement avec un ensemble d&#39;elements d&#39;appui
DE69014098T2 (de) Strahlungsaussendende paneele und anzeigeanordnungen.
EP1051582A1 (fr) Systeme d&#39;eclairage
EP1490892B1 (fr) Lampe a decharge con ue pour des decharges inhibees dielectriquement et dont la plaque superieure presente une structure ondulee
DE19817480B4 (de) Flachstrahlerlampe für dielektrisch behinderte Entladungen mit Abstandshaltern
DE69105382T2 (de) Strahlungsemittierende Platte und Sichtanzeigevorrichtungen.
EP0912992B1 (fr) Spot plat
DE19817476B4 (de) Leuchtstofflampe mit Abstandshaltern und lokal verdünnter Leuchtstoffschichtdicke
EP0992060B1 (fr) Tube fluorescent avec epaisseur de couche de la substance fluorescente adaptee a la repartition geometrique des decharges
DE19927791A1 (de) Farbanzeige mit sequentieller Primärfarberzeugung
WO2000065635A1 (fr) Lampe a decharge dielectrique interdite, munie d&#39;un dispositif ecarteur
EP2924349B1 (fr) Éclairage entièrement plat
DE102004056304B4 (de) Beleuchtungsanordung mit einer Leuchtstofflampe, insbesondere einer Kaltkathodenlampe
DE10310144A1 (de) Entladungslampe für dielektrisch behinderte Entladungen mit zurückspringend überhändenden Entladungselektrodenabschnitten
WO2007141184A2 (fr) Lampe à décharge pour des décharges bloquées par diélectrique avec récipient de décharge plat
DE102005046481A1 (de) Entladungslampe für dielektrisch behinderte Entladungen mit Boden- und Deckenplatte und Stützelementen dazwischen
DE19826548A1 (de) Beleuchtungsanordnung
DE8814555U1 (de) Lichtlenker als Sekundärlichtquelle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030926

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

17Q First examination report despatched

Effective date: 20070514

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50309779

Country of ref document: DE

Date of ref document: 20080619

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20090210

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50309779

Country of ref document: DE

Owner name: OSRAM GMBH, DE

Free format text: FORMER OWNER: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG, 81543 MUENCHEN, DE

Effective date: 20111130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111001

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120328

Year of fee payment: 10

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50309779

Country of ref document: DE

Owner name: OSRAM GMBH, DE

Free format text: FORMER OWNER: OSRAM AG, 81543 MUENCHEN, DE

Effective date: 20130205

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20130321

Year of fee payment: 11

Ref country code: FR

Payment date: 20130408

Year of fee payment: 11

Ref country code: GB

Payment date: 20130321

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20130320

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 50309779

Country of ref document: DE

Owner name: OSRAM GMBH, DE

Free format text: FORMER OWNER: OSRAM GMBH, 81543 MUENCHEN, DE

Effective date: 20130822

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50309779

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20141001

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140303

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141128

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50309779

Country of ref document: DE

Effective date: 20141001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140331

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141001