DE102014116740A1 - Luminaire comprising at least two OLED bulbs - Google Patents

Abstract

The present invention relates to a luminaire comprising a support plate (13) made of an at least partially translucent material, at least two OLED bulbs (14, 15, 16) designed as OLED panels, both of which are flat on the rear side facing away from the light Support plate (13) rest, contact means for contacting each pole of the OLED panels, fastening means for fixing the OLED panels on the support plate and means for powering the OLED bulbs. According to the invention, a cover plate (12) is provided as a second plate, which is arranged on the rear side of the OLED panels (14, 15, 16) opposite the carrier plate (13) and the contact means (21) for contacting the OLED panels on this cover plate (12). The solution according to the invention provides a luminaire which ensures effective light extraction of the light emitted by the OLEDs and uniform light distribution over the light-radiating surface of the carrier plate and which has a comparatively simple construction and an appealing design. The luminaire according to the invention can be, for example, a pendant luminaire, suspended luminaire, ceiling mounted luminaire, ceiling luminaire, floor lamp or table lamp.

Description

The present invention relates to a lamp comprising a support plate made of an at least partially translucent material, at least two trained as an OLED panel OLED bulbs, which both lie flat on the side facing away from the light emitting side of the same support plate, contact means for contacting each of the two poles of OLED panels, fixing means for fixing the OLED panels on the support plate and means for powering the OLED bulbs.

Organic LEDs, hereinafter referred to as OLED have been known for some years and have been used mainly in the display area. The reason for this is that the luminous flux emitted by the OLEDs was not sufficient until some time ago for general lighting purposes. OLEDs could therefore only be used for additional lighting or effect lighting. In addition, until a few years ago, OLED manufacturing costs were so high that use for general lighting purposes was not economical. Recently, however, more and more effective OLEDs have been developed with increasing luminous efficacy and production costs have steadily declined.

For example, the company Philips offers under the name "lumiblade GL 350" flat OLED panels, which provide a luminous flux of 120 lumens of white light at a size of 124.5 × 124.5 mm, for example, for a table lamp or other applications in the field of residential lighting is quite sufficient (see publication on the Internet at http://www.lighting.philips.de/lightcommunity/trends/oled/lumibladeoledgl350.wpd .)

In OLED panels of the type mentioned is usually the actual OLED stack on a support plate made of glass or plastic. If you want to integrate such an OLED panel in a luminaire, is basically a constructive solution into consideration, in which the OLED panel or more such OLED panels are mounted on a translucent support plate. However, there are still some technical problems to be solved, namely on the one hand must create a contact with the OLED panel to provide them with power and on the other hand you have to securely fasten the OLEDs on the support plate. Finally, if necessary, photometric measures are required which ensure effective light extraction of the light emitted by the OLEDs and a uniform light distribution over the light-emitting surface of the support plate.

From the DE 10 2010 038 251 A1 an OLED illuminant in the form of an OLED panel has become known as well as a luminaire which has a plurality of these OLED panels in a matrix-like arrangement with rows and columns. Each of the OLED bulbs are assigned a plurality of contacts for the electrical contacting of the respective light source. The luminaire has a housing with a frame that surrounds the edge of the OLED panel at the front and a housing back wall in which the contacts are held. The rear wall of the housing is made of a non-translucent plastic, since it is provided that the light exit takes place only on the front side over the illuminated area bordered by the frame. At the back of the back of the case, a socket is also attached, through which you can connect the lamp to supply lines. The OLED panel is thus in this known lamp between the front frame and the opaque rear wall. Since each OLED panel at the light exit side has a frame enclosing its luminous area, the entire light-emitting surface of the luminaire between the rows and the columns is interrupted in each case by the webs of the frame of the bulbs in a matrix-like arrangement of several such bulbs. Although an overall luminous area is created here by arranging a plurality of similar luminous means next to one another, each luminous means remains one unit per se and there is no common carrier plate on which several illuminants are located.

In the DE 10 2011 077 687 A1 is a module (a lamp) with a plurality of matrix-like arranged in several rows OLED panels described in which a contact structure is arranged centrally between two juxtaposed OLED panels. The OLED panels may be octagonal or rectangular in outline. Contact areas along a facing edge of the adjacent OLED panels can be electrically conductively connected via a spring of the central contact structure. Each OLED panel in each case has its own substrate which serves as a carrier for the first electrode layer, the organic layer sequence with the emitter layer and the second electrode layer, wherein this layer sequence is generally referred to in the art as an OLED stack. The functional layers of each OLED panel are covered on the upper side by a glass plate serving as an encapsulation. This upper-side encapsulated surface is the surface of the OLED panel at which the light emerges. Thus, if one looks at the substrate as a support plate of the individual OLED panel, then this support plate is located on the opposite side of the light emitting side of the OLED panel. Even with closely spaced OLED panels, the support plates of the OLED panels are also separated from each other, because every OLED panel Panel around a self-sufficient unit, which represents a light source for the lamp. If a plurality of rectangular OLED panels arranged in a row in rows in rows, a base frame is provided with recesses as an additional mechanical support on the one hand and a cover frame is arranged on the base frame and mechanically connected thereto. The deck frame has cross-shaped ridges that cover the contact structures located centrally between the adjacent OLED panels. Overall, a light exit surface is thus created, which is divided by the webs of the base frame and the cover frame in the longitudinal and transverse directions. In the variants described in this document, in which octagonal OLED panel modules are strung together, these are connected in their peripheral regions via, for example, rod-shaped connecting elements and eyelets. Thus, there is no common support plate provided on which a plurality of OLED panels are applied and this serves as a supporting structure.

In the US 2013/0076229 A1 is a flat panel-like OLED illuminant module described as well as a lamp comprising this OLED illuminant module. The OLED illuminant comprises, in addition to the actually light-emitting module with the OLED layers, a multipart fastening part. In front of the OLED panel, there is a transparent cover on the light-emitting side, while on the back there is a housing made of a non-transparent material, which also holds the front cover. The closed housing prevents light leakage to the rear of the module. The light emitting module is enclosed by a comparatively wide rectangular frame which reduces the light emitting surface. The contacting of the OLED stack also takes place via the frame. Measures have been taken in this OLED lighting module to redirect light emitted by the light-emitting module into the transparent cover in its edge region by scattering or reflection back into the transparent plate in order to achieve a certain brightening in the edge region. Although a loss of light is prevented by total reflection in the protruding edge region of the transparent plate, the effective area of the part of the OLED emitting light with sufficient luminous intensity remains the same here. The document does not describe any technical solution on how to possibly combine several of these OLED illuminant modules in one luminaire. Since the illuminant modules have a comparatively wide peripheral edge, one would not achieve a continuous luminous area when juxtaposed. If one would regard the lower transparent cover of the OLED lamp module as a support plate for the module, then this support plate would be associated with only a single light source, the side walls of the rear housing even overlap the support plate at a distance. A continuous support plate for a plurality of lamp modules is neither provided nor technically possible in this known solution.

From the DE 10 2006 054 584 A1 is a storage furniture known with a shelf, which comprises a surface-shaped radiation-emitting device in the form of a plate-shaped OLED. Basically, it is thus known from this document to illuminate flat plate-shaped areas of a piece of furniture on OLED panels. However, this document does not contain information on how to bring several OLED panels in a shelf. As currently the largest OLED panels of the latest generation available on the market have a size of more than 120 mm × 120 mm, the use of only one OLED would illuminate only a comparatively small storage area of a piece of furniture.

In the DE 10 2004 026 730 A1 It is proposed to illuminate flexible film-like surfaces with the aid of LEDs or even OLEDs. For example, a transparent film is suspended in a frame system. Point-shaped LEDs are each introduced at a distance from each other in a matrix-like arrangement in the film, wherein they are contacted via intersecting horizontally and vertically extending wires. In such an arrangement, one does not obtain a uniform surface light emission, but the impression of a plurality of points of light. In this document, the examples do not include embodiments in which multiple areal OLED panels are combined to create a uniform luminous area.

The DE 10 2011 079 014 A1 describes light modules in the form of flat OLED panels. In this document, it is also mentioned that you can create a flat lighting arrangement of several such lighting modules, where the individual lighting modules connected via electrical connections either in series or in parallel with each other. The OLED panel here has a structure with an active element which contains the light-emitting OLED stack and is sandwiched between two plates, namely a carrier plate and a plate serving for encapsulation. Both the carrier plate and the encapsulating substrate can be made of a transparent material, for example glass or plastic. In this document, the fundamental problem of the usual OLED panels has been recognized, which have a light-emitting surface enclosing frame by which the area of the effective light output is limited. In order to make the frame narrow, it is proposed that the tracks, the electrical connections to Contacting the OLED form to arrange outside of the perimeter at end faces of the panel. Although the narrower frame reduces the amount of non-luminous surfaces and spaces between the panels when several OLED panels are combined, the fundamental problem of interruption due to non-luminous stripes persists. This document does not disclose a concrete solution, how to create a continuous luminous area in a luminaire by combining several OLED panels. Only a single OLED panel is shown, which is only a "light source". Even if here the individual light source has a transparent support plate, this support plate is assigned only to this light source, firmly connected to the encapsulation plate to a non-detachable unit. If one were to solve the connection between the support plate and encapsulation plate of such an OLED panel, the active OLED layer would be exposed to the atmosphere and affected by moisture and atmospheric oxygen in their function and life. The single OLED panel sandwiched by two panels enclosing the active light emitting layer is thus a self-sufficient, non-removable unit, which has to be considered by the designer of a luminaire using such OLED panels as the illuminant. Thus, if several OLED panels of this type are used in one luminaire, each OLED panel has its own support plate, the entire material thickness of a commercially available OLED panel having a sandwich-type construction of the aforementioned type being approximately 1.8 mm, for example.

In the DE 10 2006 015 437 A1 a luminous tile is described which has at least one OLED as the luminous means. The light-emitting tile has a layer construction with a back-side support plate, a front-side viewing panel over which the light is emitted and a gap between the two plates, which accommodates the OLED layers and is sealed to the outside. An electrical connection is furthermore provided on the rear side of the luminous tile in order to contact the OLED. Although it is mentioned in the document that in principle several OLEDs can be used in a luminous tile, however, no concrete technical solution is shown that realizes this idea. The carrier plate on which the OLED layers are applied, here is the back non-transparent plate of the luminous tile. If one were to arrange several such luminous tiles next to each other, this would result in unlighted areas between the tiles, since the effective light-emitting area here is also much smaller than the surface of the luminous tile as a whole.

In the DE 10 2011 107 642 A1 Another OLED illuminant is described. This has a visible support plate made of glass, on the surface of which the light is emitted. The OLED layers are applied to the rear side of the carrier plate, a cover plate being located behind the carrier plate so that the OLED layers lie between the carrier plate and the cover plate. Behind the cover plate is still a plate-shaped heat sink, through which the heat is to be dissipated. The entire arrangement is enclosed in an insulating material housing in which contact angles are also held with two legs, one leg of which contacts a metallic layer in the edge region of the carrier plate. Due to the non-transparent heat sink, the light output is only possible to one side. The insulating material housing forms a comparatively wide frame, which surrounds the light-emitting surface of the OLED illuminant on the periphery on all sides, so that when a combination of several OLED illuminants of this type no continuous luminous surface can be created. This document also gives no suggestion to create a luminaire using a plurality of OLED bulbs of this kind. Here, only one solution is presented to grasp and contact a carrier plate coated with an OLED stack. This in turn results in a single OLED illuminant, in which case an individual solution for a further OLED illuminant is described.

On the market, however, OLED panels of some leading lighting suppliers are known, the predetermined structural features for contacting, socket, etc., so it is advantageous for the lighting designer, in the construction of a luminaire based on OLED bulbs the circumstances take into account these OLED bulbs available on the market instead of creating another individual OLED bulbs.

The object of the present invention is to provide a luminaire using OLED panels as lighting means with the features of the type mentioned, which has at least one continuous luminous surface without interruptions with largely uniform light output via the luminous surface, wherein the dimensions of the luminous surface is not are limited to the dimensions of a single OLED bulb.

The solution of the above object provides a luminaire of the type mentioned above with the features of claim 1.

In the older not previously published application DE 10 2013 112 694.4 from 18. 11. 2013, a luminaire is described with at least two OLED panels on a common support plate with the features of the aforementioned type. In the present application is an alternative Solution that is advantageous for certain types of OLED panel available on the market.

According to the invention a second plate is provided, which is referred to herein as a cover plate to be regarded as a first plate, said cover plate is disposed on the support plate opposite the back of the OLED panels and contact means for contacting the OLED panels at this Cover plate are located. Unlike the aforementioned alternative according to the own earlier application DE 10 2013 112 694.4 The Applicant thus now OLED panels are no longer contacted directly via contact means on the support plate.

According to a preferred embodiment of the invention, conductor tracks are applied to the surface of the cover plate facing the OLED panels.

According to a further preferred embodiment of the invention, the contact means, which contact the OLED panels, with printed conductors on the cover plate in electrically conductive connection. These interconnects can in turn preferably be electrically connected to further contact elements via which the voltage supply of the quasi-circuit board formed as cover plate. These further contact elements can in turn preferably be electrically conductively connected to contact flanges, via which the current is fed into the luminaire, wherein these contact flanges can be mounted, for example, on the carrier plate.

According to a possible variant of the lamp according to the invention, for example in a pendant lamp, the cover plate can be simply placed only on the support plate. Alternatively, however, it may also be advantageous to fasten the cover plate to the support plate by means of suitable fastening means, in which case the attachment via magnetic elements on one plate and corresponding magnetic elements or metallic elements on the respective other plate is mentioned by way of example.

A preferred embodiment of the invention provides that electronic components are arranged on the cover plate in addition to the preferably printed circuit traces, for example, regulating function with regard to the power supply or voltage to the OLED panels or the brightness (dimming function) or the color reproduction of the OLED Have bulbs.

Furthermore, it is possible to provide, for example in the area of the cover plate, electronic components which are required for switching functions or dimming functions of the luminaire or individual luminous means. For example, on the side of the cover plate facing away from the light, a touch dimmer or touch switch can be arranged which activates electronic components provided on the underside of the cover plate, such as a capacitive sensor, which may be printed there, for example , When using such a function, it is advantageous if the cover plate is made of glass. In principle, however, the cover plate can also consist of other materials and it does not have to be transparent or translucent, as long as a light emission is provided only over the light-emitting surface of the support plate.

The solution according to the invention leads to luminaires with uniform luminous surfaces which are not interrupted by frames or the like, using illuminants in the form of OLED panels available on the market in standard design. The lights according to the invention are constructively comparatively simple in design, have an attractive design, in particular because they are very flat and clear, reduced to the essentials forms can be used. Furthermore, the lights meet the other aforementioned technical requirements.

In principle, the luminaires according to the invention consist of the carrier plate over whose surface the light is emitted, the cover plate, which can be prefabricated with the conductor tracks, electronic components and contact elements and the OLED panels, which are arranged as if sandwiching between the carrier plate and the cover plate are. The number of OLED panels depends on their size and the size of the desired light-emitting surface, wherein two, three, four, five or more OLED panels can be arranged next to one another, in particular in a row or grid-like manner in a plurality of adjacent rows.

In a luminaire according to the invention, in each case two contact elements assigned to an OLED panel, in particular contact springs, are generally fastened to the side of the cover plate facing the support plate, which contact one pole of the OLED panel in each case. Other contact elements, such as contact springs can contact mounted on the support plate contact flanges, which can be fed via these contact flanges of the current in the lamp and possibly also the attachment of a suspension of the lamp in the region of the contact flanges can take place.

A particularly advantageous embodiment of the invention provides that at least one clamping device as a fastening device for each an OLED panel is provided on the carrier plate. These can be, for example, staples which are simply pushed over the edge regions of the OLED panels in order to fix them on the carrier plate. For example, to fix the OLED panels in their relative position on the backing plate, position angles may also be used. This solution is structurally simple and effective and enables a rational production of such an OLED lamp.

For the electrical supply to the contact elements that contact the OLED panels, you can, for example, use printed on the cover plate printed conductors, this technique of printed circuit traces from other areas of lighting technology is known per se.

An advantage of a luminaire according to the invention is also that this works with very few functional components and the type of lighting and their contacting allows an extremely flat construction of the lamp. It is possible to use, for example, a thin carrier plate made of glass or plastic glass, onto which the very flat OLED panels are applied directly, which have only a material thickness of, for example, in the 1 to 2 mm range. The cover plate on which the electronic components and the contact elements are located can also be very flat, usually even flatter than the support plate, since the cover plate has no supporting function. As a result, the overall height of the lamp is very low. Unlike the previously known solutions, the luminaires according to the invention require neither frame elements nor housing elements, nor are mountings for the OLED illuminants in the classical sense necessary.

The contact flanges, for example, by gluing on a surface facing the OLED panel made of glass or plastic glass of the support plate can be mounted on this.

The contact elements, in particular contact springs, for example, can be soldered or glued onto printed conductors of the cover plate.

The electrical supply of the lighting means can be carried out according to a possible preferred variant of the invention, in that a power supply supplied from the outside of the lamp first electrically contacts contact flanges. This contact flanges can be arranged for example in the field of attachment, suspension or mounting of the support plate of the lamp and thus optionally additionally fulfill a mounting or mounting function. Starting from the contact flanges, the current is conducted in a suitable form to the contact elements, for example by direct contact of these components. Via conductor tracks on the cover plate, the current is then conducted, for example, to further contact elements, which in turn contact the contact areas of the OLED panels arranged on the carrier plate. In this way, the electronic components arranged there can be integrated into the circuits on the cover plate, which are required for the operation and the control of the OLED lamps.

Preferably, at least the OLED panel facing surface of the translucent support plate of glass or plastic glass, in particular acrylic glass and also preferably one of the translucent support plate facing and releasably connected to this carrier layer of the OLED panel made of glass or plastic glass, in particular acrylic glass. The OLED panels are preferably arranged detachably on the carrier plate, in particular by clamping devices of the aforementioned type. This has the advantage that, in the event of a malfunction, each OLED panel can be exchanged with little installation effort.

At this point, an important difference to the above-mentioned prior art must be pointed out. Some available on the market OLED panels such as the OLED panel from Philips, model Lumiblade GL350, itself usually already include a lower support plate made of glass and a glass top encapsulation, which protects the OLED layer, so that a sandwich Structure results in which the OLED stack between two glass plates, which are very thin, for example in the range of about 1 mm or less, since the total material thickness of the OLED panel is usually about 2 to 3 mm. In addition to the material thickness of the structure contributes to the frame, which surrounds the thin glass plates of the sandwich structure all around. A schematically simplified drawing of such a structure of an OLED panel from the company Philips can be found in the WO 2011/030283 A2 , The OLED panel described there may optionally emit light on both sides, ie both through the lower transparent substrate and also upwards through the likewise transparent cover for encapsulation. The aforementioned transparent substrate serves in the luminous means as a carrier for the OLED stack. However, this support of the OLED illuminant itself is not to be confused with the translucent support plate made of glass or plastic used in the present invention. This is the carrier plate of the luminaire onto which the OLED panels are applied, namely at least two of these OLED panels. The support plate according to the invention preferably has a supporting function for the entire luminaire, ie the suspension or mounting of the luminaire can be attached to this support plate.

All essential components of the lamp according to the invention, which are not mounted on or on this support plate can be arranged on the cover plate, so that during assembly by sandwich-like joining of support plate and cover plate, the lamp can be created.

The support plate has dimensions such that two or more OLED panels can be placed on the support plate, depending on how many bulbs are provided for the light. If, for example, two OLED panels are arranged approximately in a row in the longitudinal direction on the carrier plate, then the carrier plate is continuous and extends in the longitudinal direction at least over the length of both OLED panels. Optionally, the carrier plate is also wider than the single OLED panel. If two OLED panels or two rows of OLED panels in the width direction are provided, then the carrier plate according to the invention extends in the width direction at least continuously over the width of the two OLED panels or the two rows of OLED panels. The cover plate preferably has similar dimensions as the carrier plate, but usually extends at least over the surface of all OLED panels, so that they can be contacted.

Another important aspect of the present invention is that it is possible to form the support plate supporting all the OLED bulbs of the luminaire in such a way that it optically influences and distributes the light emitted by the luminous means, so that one does not use a bare one as in the prior art Stringing a plurality of panel-like bulbs with interruption of the light output between them receives, but a light emitting surface with a substantially uniform light output, which represents a luminous total area, the size of which does not depend on the dimensions of individual OLED panels, wherein the luminous flux from the light emitting surface of the Carrier plate is discharged, however, contribute several OLED panels.

In order to influence the emitted luminous flux and to achieve a defined as uniform as possible light emission over a relevant region of the carrier plate (possibly the entire carrier plate), according to a preferred embodiment of the invention, the carrier plate is frosted on its light-emitting side at least in some areas, in particular by etching, Sandblasting, grinding, lasers or the like. This allows you to achieve a more uniform light distribution. The light is then emitted not only in the areas corresponding exactly to the luminous surfaces of the OLED panels, and the discrete outlines of the luminous surfaces are no longer or less pronouncedly perceived by the observer. If several OLED panels are used, virtually the entire surface of the carrier plate can emit light at its light-emitting side.

As an alternative to a change in the light emission characteristic of the support plate by its treatment on the surface by one of the methods mentioned herein, front and / or back, you can also incorporate, for example in the support plate scattering particles that unfold a comparable effect, cause a more uniform light emission and training of high-contrast light-dark zones in the edge area of individual OLED panels.

On the rear side facing away from the light-emitting side, for example, the support plate can be coated or printed at least in some areas in order to change the light emission characteristic or the light color or, for example, to achieve a light output or an altered light output only in selective area areas. Such a coating may be partially translucent and their application may be by printing, for example by screen printing or digital printing or other suitable printing processes.

Alternatively, the coating may be carried out by any of the common thin film methods known in the art, for example by vacuum deposition, evaporation (PVD), sputtering, plasma coating, vapor deposition (CVD), sol-gel deposition, spin coating, roll coating , Spraying, exchange coating etc.

For example, it is possible to achieve selective light scattering in specific surface areas by printing, lasering, sand blasting, grinding, milling, etching or the like in order to effect increased light extraction there. A coating of the carrier plate on the side facing away from the light output can be partial or full-surface, for example, for applying a mirror coating.

By printing or coating can be achieved that in the off state of the area or areas in which the visible light exit surface of the OLED panels are or are, in their color and / or in their appearance, little of the remaining area distinguish the support plate and thus one obtains a largely homogeneous appearing visible surface, which ensures a pleasing visual appearance of the lamp according to the invention.

A luminaire according to the invention may have two or more OLED panels. Most of the OLED panels have a roughly rectangular outline, but other outline shapes are conceivable. If two or more OLED panels are used, they can be arranged next to one another, for example, in a row or in several rows, with the OLED panels generally being arranged on the rear side of the at least partially transparent support plate facing away from the light-emitting side.

You can switch the OLED panels in parallel or in series. In the latter case, interconnects each connect the different poles of an OLED panel.

According to a preferred embodiment of the task solution according to the invention, the translucent support plate on which two or more OLED panels are mounted, for example, part of a pendant lamp. The power supply can be done in such a pendant lamp, for example via the suspension of the lamp, which is mechanically connected at its lower end with the support plate. From there, for example, via a contact flange of the suspension can produce an electrically conductive connection with a conductor track of the cover plate, which in turn can be printed on the glass or acrylic glass of the cover plate, wherein the cover plate may also consist of other materials. Glass or plastic glass is recommended if you want a similar material with the carrier plate to create a uniform appearance of the lamp.

Other possible luminaire variants in which a translucent and light-emitting support plate is equipped with two or more OLED panels according to the principle of the invention are, for example, a suspended luminaire, ceiling mounted luminaire, recessed ceiling luminaire, wall luminaire, recessed wall luminaire, floor lamp or table lamp. The back side facing away from the light-emitting side of the support plate according to the above definition, for example, in a pendant lamp, the top of the support plate. According to the invention, one or more OLED panels are thus arranged on the upper side of the at least partially translucent carrier plate in the case of a pendant luminaire.

Further alternative variants of the luminaires according to the invention can be, for example, recessed floor luminaires, mirror luminaires, furniture luminaires or illuminable furniture elements, mobile luminaires, outdoor luminaires, street lights, orientation luminaires, signage luminaires, or luminaires for emergency lighting.

The features mentioned in the dependent claims relate to preferred embodiments of the invention. Further advantages of the invention will become apparent from the following detailed description.

Hereinafter, the present invention will be explained in more detail by means of embodiments with reference to the accompanying drawings. Showing:

1 a simplified schematic exploded perspective view of an exemplary pendant lamp according to the invention;

1a an enlarged detail view of a section of the cover plate;

2 an enlarged sectional view of a section of the light of 1 ;

3 a simplified schematic plan view of the support plate of the lamp, of which only a section is shown;

3a a perspective view of a detail of 3 ;

4 a perspective view from above of the lamp, but without the suspension;

5 an enlarged detail view of a detail of the representation of 4 ;

6 a view of an alternative variant in which a lamp according to the invention is designed as a floor lamp;

7 a view of a further alternative embodiment in which the carrier plate is printed on the back.

Reference is first made to Figures 1 and 2, and based on this, the basic design of a lamp according to the invention with OLED panels is exemplified as a light source. This variant is a pendant lamp 10 which can be hung on a ceiling of a room. For this purpose, the lamp has two suspensions 11 at a distance from each other, which can also be used for the accommodation of electrical lines for the power supply of the lamp, as will be explained in more detail below. However, the suspensions are in the exploded view according to 1 not shown. The luminaire comprises a carrier plate 13 with a substantially rectangular floor plan, so that there are two long sides and two transverse sides. However, the layout is within wide ranges variable and the rectangular elongated shape should be presented here only as an example.

1 further shows that on the top of the rectangular support plate 13 several equally rectangular, here almost square OLED panels 14 . 15 . 16 are applied on the carrier plate 13 be supported and fixed and fixed in a row each with distance from each other and in the longitudinal direction of the support plate 13 Seen side by side. The number of OLED panels, their outline shape and their arrangement on the support plate can be varied within wide ranges, for example, depending on the size and outline of the support plate 13 as well as depending on the intended use of the luminaire and lighting parameters such as the desired lighting characteristics, illuminance, etc. In the embodiment, it is a comparatively elongated lamp with a total of five OLED panels 14 . 15 . 16 ,

The rectangular elongated carrier plate 13 At least in the region in which the light is emitted downwards, consists of a transparent or translucent material, in particular of glass or acrylic glass. On this carrier plate 13 be multiple in outline rectangular OLED panels 14 . 15 . 16 applied. The light-emitting side of the OLED panels is down here and to the carrier plate 13 directed so that the OLED panels emit their light through the support plate down through. This is therefore a direct luminaire.

2 shows an enlarged sectional view of a section of the pendant lamp of 1 , from which one the basic principle of contacting the on the carrier plate 13 attached OLED panels 14 . 15 . 16 can recognize, where in the section only one of the OLED panels 14 is recognizable. It is ever a contact flange 17 provided in the area of the respective suspension 11 on each side on top of the carrier plate 13 can be attached and via which the supply of electricity to supply the OLED panels can be done if the rope-like suspension 11 is live. This contact flange 17 thus has a double function, because he holds the support plate in a pendant light 13 and he has electrically conductive areas, for example, the upper side, the contact springs 20 be touched and contacted. These contact springs 20 are located on a second plate, the cover plate 12 on the carrier plate 13 is hung up. This cover plate 12 For example, it may also be made of glass or other suitable materials. On the underside of this cover plate 12 which is the top of the backing plate 13 facing, are tracks 18 For example, on the cover plate 12 can be printed. An in 2 recognizable trace 18 leads from the left in the drawing contact spring 20 , which corresponds for example to a pole, to another contact spring 21 , which is also located on the underside of the cover plate and then the contact area of a pole of one of the OLED panels 14 will be contacted. The contact is made simply by the cover plate 12 on the carrier plate 13 is hung up. The OLED panel 14 again lies in a defined position on the support plate 13 and is there, for example, releasably secured by clamping, as will be explained in more detail below.

It will be up again 1 Referenced. There you can see the cover plate 12 recognize as well as the two contact flanges 17 right and left as parts of the suspension for the support plate 13 and the lamp in total. Furthermore one recognizes several position angles 19 on the carrier plate 13 be attached and serve as an attachment to the corners of the OLED panels, so their position on the support plate 13 define.

An enlarged section of a section of the cover plate 12 show the 1a , There you can get two of the contact springs 20 . 21 detect, for example, be soldered or glued to a conductor track. Furthermore, one can see schematically illustrated electronic components 22 which are used to regulate and monitor the voltage and current for the power supply of the OLED panels and, if necessary, to take on additional control functions such as brightness control, color control or switching functions.

The arranged on the support plate OLED panels 14 . 15 . 16 can be connected in parallel or in series, as required, and the contact springs will correspond accordingly 20 . 21 over conductor tracks 18 linked and in the appropriate circuits are necessary for the intended functions electronic components 22 built-in. The circuits with all the necessary contact elements, tracks and electronic components can on the cover plate 12 be prefabricated so that it is sufficient during assembly, the cover plate 12 on the carrier plate 13 on which are already the OLED panels 14 . 15 . 16 to hang up to make all the contacts and to ensure the electrical functions of the bulbs.

The voltage supply of the contact flanges 17 can turn on a pendant light like this in 2 is shown on the suspensions 11 the lamp done. For this purpose, for example, starting from an electronic power supply in each case a supply line through each of the two suspensions 11 passed, then each at their end via the contact flanges fastened on the carrier plate 17 and of these on the cover plate 12 attached contact springs 20 with tracks 18 on the cover plate 12 makes an electrical contact.

Hereinafter, referring to FIGS 3 and 3a the positioning and fixing of the OLED panels 14 . 15 . 16 on the carrier plate 13 explained in more detail. You can see in 3 a part of the carrier plate 13 the light in the top view. On the left is a contact flange in outline 17 to recognize, where the suspension can be attached to a pendant lamp and so the support plate 13 is held. You can still see in 3 four position angles 19 each for the four corner areas of an OLED panel 14 , In this variant, the OLED panels 14 approximately square and are when placed on the carrier plate 13 through the four position angles 19 placed exactly in the intended position. A single position angle 19 can be like in 3a recognizable about a T-shape, so that a position angle can be used simultaneously for the positioning of two adjacent OLED panels.

3a shows on an enlarged scale one of the outer position angles 19 , This has due to its T-shape a foot area, which is the lower portion of the vertical T-bar. This foot area 19a can have a free space on the underside, so that there is a clip 191 can insert that under this foot area 19a engages and one end of it over the edge area of the OLED panel 14 is pushed, so that the OLED panel thereby clamped and on the carrier plate 13 is held. By pushing back the clip 191 This clamp connection can be easily solved again, if the OLED panel, for example, for inspection purposes of the support plate 13 should be accepted. The attachment of the OLED panels 14 . 15 . 16 on the carrier plate 13 is thus solvable, so that there is the advantage that a no longer functional OLED panel can be replaced if necessary.

In 3a are still magnetic elements 192 recognizable, for example, outside laterally next to the position angles 19 can be located and serve a connection between the carrier plate 13 and the cover plate 12 manufacture. In the pendant lamp shown in the embodiment, this connection is not absolutely necessary, since it is basically sufficient if you the cover plate 12 simply on the carrier plate 13 hangs up. However, this additional attachment is beneficial and in other types of luminaires such as floor lamps usually also required. On the cover plate 12 may be appropriate magnetic elements or metallic elements, so that after placing the cover plate 12 on the carrier plate 13 between these two plates results in an easily releasable magnetic adhesive bond.

4 shows a perspective top view of a lamp according to the invention 10 but without the suspension. You look from above on the cover plate 12 , the light exit from the lamp is down. You can see the top of the cover plate 12 to use there, switching elements 121 to arrange for certain functions that affect the regulation of the lamps or the like. The switching element 121 is in the detail section according to 5 shown enlarged again. In the example, it is a touch dimmer, which allows dimming the lamp to touch. This can be technically solved, for example, via a capacitive-sensitive area, in the cover plate 12 is housed, for example, on the top of the cover plate 12 a hollow in the cover plate 12 can grind so that the operator can feel the dimmer area.

In the 6 is an alternative embodiment too 1 which shows a different type of luminaire, in which the structure described above, that is, the type of arrangement of OLED panels on a support plate and their contacting, can take place according to the same basic principle of the present invention. 6 shows a table lamp 30 with a lamp stand 23 , a standpipe 24 , one of the upper end of which extends at an angle luminaire arm 25 in the form of a cantilever and a lamp part projecting on the lamp arm, which is a support plate 13 with OLED panels 14 . 15 . 16 having. As you can see here, for example, in the outline approximately rectangular support plate 13 be provided on the turn, for example, arranged in a row a plurality of in outline, for example, rectangular OLED panels are mounted, the light emission takes place downwards. pendant lights 10 of in 1 shown type and table lamps 30 of in 6 shown type can thus show an analog structure and thus be part of a family of lights.

Below is on the 7 Reference is made and explained in more detail with reference to this another embodiment of the present invention. The diagram shows schematically simplified a pendant light 10 diagonally from above, where the light exits downwards. The lamp has a support plate 13 on, on its back (in this case the top), facing away from the viewer with suspended lamp, has multiple printing. The basic structural design of the pendant lamp 10 according to 7 may be that of the in the embodiment described above according to the 1 to 3 so that due to the details regarding the contacting of the OLED panels, the printed circuit traces, the suspension of the lamp, etc. on the description of the 1 to 3 Reference can be made.

7 shows the multiple printing of the pendant light 10 , The back of the carrier plate is first with a first print 50 provided, in the three approximately rectangular areas 51 are omitted, since in these recessed areas later the OLED panels 14 . 15 . 16 be applied. This first printing thus forms a kind of virtual framework for the OLED panels. The printing is very thin, can be applied for example by screen printing and consists for example of ceramic pigments that are electrically insulating. These pigments may have a light color, for example, they are white. Since only the approximately rectangular areas for the later attachment of the OLED panels are recessed and the support plate 13 in their other areas is printed flat and comparatively dense, resulting in the printed areas 50 around the OLED panels and between the OLED panels faces the support plate 13 , which is largely transparent / translucent, make opaque. Thus, one can in these areas 50 later contact elements 20 for the OLED panels, contact flanges 17 in the area of the suspensions of the lamp 10 , Tracks 18 for powering the OLED panels and the like, then from the bottom of the carrier plate 13 where the light is emitted are no longer recognizable.

As part of the development of the luminaire according to the invention it was found that a printing 50 alone with light pigments, if it is very thin, may not be sufficient to ensure the desired opacity sufficiently. Therefore, it is advantageous in such a case, if then still a second printing 52 takes place, in which the same areas 53 can be omitted as in the first printing 50 , This second printing 52 For example, it can be done again with a light, eg white ceramic pigment and is preferably also very thin, for example in the micron range or even thinner.

In the embodiment according to 7 is another third printing 54 provided following the second printing 52 is applied and again at about rectangular areas 55 be left out, in which then the OLED panels are attached. This third printing is in the example to a dark, for example, black or gray printing, by means of which on the one hand, the desired opacity is achieved to a high degree, provided in this regard, the double bright previous printing 50 . 52 not enough, with the third printing 54 may still have the further advantageous effect that it reaches a higher contrast and thus a better visual appearance of the areas covered by the multiple printing. For printing on the printed conductors 18 on the cover plate 12 For example, an electrically conductive pigment may be used, for example, with a silver content. Thereafter, then the further assembly of the lamp with application of the contact flanges 17 , the OLED panels 14 . 15 . 16 and the cover plate 12 ,

LIST OF REFERENCE NUMBERS

10

 pendant light

11

 suspension

12

 cover plate

121

 switching element

13

 support plate

14

 OLED panel

15

 OLED panel

16

 OLED panel

17

 contact flange

18

 conductor path

19

 position angle

19a

 footer

191

 clip

192

 magnetic element

20

 Contact spring, contact element

21

 contact spring

22

 Electronic Components

23

 the lamp

24

 standpipe

25

 luminaire

30

 table lamp

40

 floor lamp

41

 the lamp

42

 standpipe

43

 OLED panel

50

 first printing

51

 recessed areas

52

 second printing

53

 recessed areas

54

 third printing

55

 recessed areas

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102010038251 A1 [0005]
• DE 102011077687 A1 [0006]
• US 2013/0076229 A1 [0007]
• DE 102006054584 A1 [0008]
• DE 102004026730 A1 [0009]
• DE 102011079014 A1 [0010]
• DE 102006015437 A1 [0011]
• DE 102011107642 A1 [0012]
• DE 102013112694 [0016, 0017]
• WO 2011/030283 A2 [0033]

Cited non-patent literature

• http://www.lighting.philips.de/lightcommunity/trends/oled/lumibladeoledgl350.wpd [0003]

Claims (12)

Luminaire comprising a support plate ( 13 ) made of an at least partially translucent material, at least two OLED bulbs designed as OLED panels ( 14 . 15 . 16 ), which both surface on the side facing away from the light emitting side of the same support plate ( 13 ) contact means for contacting in each case both poles of the OLED panels, fastening means for fixing the OLED panels on the support plate and means for powering the OLED bulbs, characterized in that as a second plate, a cover plate ( 12 ) is provided, which on the support plate ( 13 ) opposite the back of the OLED panels ( 14 . 15 . 16 ) and that the contact means ( 21 ) for contacting the OLED panels on this cover plate ( 12 ) are located. Luminaire according to claim 1, characterized in that on the OLED panels ( 14 . 15 . 16 ) facing surface of the cover plate ( 12 ) Conductor tracks ( 18 ) are applied. Luminaire according to claim 1 or 2, characterized in that at least one contact means ( 21 ), which is an OLED panel ( 14 ), with a conductor track ( 18 ) on the cover plate ( 12 ) is in electrically conductive connection, wherein the conductor track preferably with at least one further contact element ( 20 ) is electrically connected, via which the introduction of a voltage in the cover plate ( 12 ) he follows. Luminaire according to one of claims 1 to 3, characterized in that the further contact element ( 20 ) can with a preferably on the support plate ( 13 ) arranged contact flange ( 17 ) is electrically connected, via which the supply of the current takes place in the lamp. Luminaire according to one of claims 1 to 4, characterized in that on the cover plate ( 12 ) in addition to the preferably printed printed conductors ( 18 ) Electronic Components ( 22 ), the regulating function with regard to the power supply or voltage supply to the OLED panels or the brightness (dimming function) or the color rendering of the OLED lamps ( 14 . 15 . 16 ) to have. Luminaire according to one of claims 1 to 5, characterized in that at least one clamping device ( 191 ) as a releasable fastening device for at least one OLED panel ( 14 . 15 . 16 ) on the carrier plate ( 13 ) is provided, wherein the clamping device comprises at least one clip which is pushed over an edge region OLED panels to fix it on the support plate. Luminaire according to one of claims 1 to 6, characterized in that a side facing away from the light emitting side of the lamp top of the cover plate ( 12 ) touch-sensitive dimmer ( 121 ) or touch switch is provided which activates a dimming function or switching function of at least one light source of the luminaire via an electronic component provided on or under the cover plate. Luminaire according to one of claims 1 to 7, characterized in that this is a pendant lamp ( 10 ) and at least one contact flange ( 17 ) in the area of the suspension ( 11 ) of the lamp is arranged, wherein an electrical supply line of the lamp by the suspension ( 11 ) of the lamp to the contact flange ( 17 ) and is in an electrically conductive connection with this at its lower end. Luminaire according to one of claims 1 to 8, characterized in that the carrier plate ( 13 ) on the side facing away from the light-emitting side is coated, glued, matted or printed in those subregions in which fastening elements, in particular for the suspension or mounting of the luminaire are located and / or that the carrier plate ( 13 ) on the side facing away from the light-emitting side with at least one layer frame-like printed, glued, frosted or coated, in particular the edge regions of the light-emitting surface of the OLED panels ( 14 . 15 . 16 . 43 ), and these adjacent areas, wherein this printing, gluing, matting or coating, the light-emitting surfaces on which the OLED or panels ( 14 . 15 . 16 . 43 ) are applied, spared. Luminaire according to one of claims 1 to 9, characterized in that the carrier plate ( 13 ) is frosted on its light-emitting side at least in some areas, in particular by etching, sandblasting, grinding, laser cutting, milling, printing, spraying, coating or the like. Luminaire according to one of claims 1 to 10, characterized in that it is a mobile lamp, a mirror light, a furniture lamp or an illuminated furniture element, an outdoor lamp, recessed floor light, ground-mounted luminaire, street lamp, orientation light, a lamp for emergency lighting or an indicator light or signal light or an illuminable part of such a lamp is. Luminaire according to one of claims 1 to 10, characterized in that it is an interior light, in particular a pendant lamp ( 10 ), Suspension lamp, ceiling mounted light, Recessed ceiling light, wall mounted light, recessed wall light, floor lamp ( 40 ) or table lamp ( 30 ), or is a part of such a lamp, or that this is a light shelf, light panel, electrical appliance, household appliance, urban furniture, facade element, wall element, ceiling element, an exterior light of a motor vehicle or a mounting device of a motor vehicle, rail vehicle, ship or aircraft illuminable part of such an article.

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