EP3211296B1 - Inverted led conductor card - Google Patents

Description

The invention relates to a lamp with a printed circuit board and a carrier according to the preamble of claim 1.

Luminaires of the generic type comprise a carrier which carries essential elements of the luminaire, such as, for example, a printed circuit board and light sources arranged thereon, as well as a cover element which forms an optical closure for the luminaire. The printed circuit board is mostly designed as a circuit board which has conductor tracks and on one side of which light sources, mostly LEDs, are arranged. In generic lamps, the carrier usually has a U-shaped cross section with a bottom section and two side sections and extends perpendicular to the cross section over a considerable length, for example over at least ten times the width of the U-shaped cross section. In the case of luminaires of the generic type, the circuit board is placed and fixed on the base section of the carrier, the light sources being arranged on the side of the circuit board facing away from the base section so that the light sources can emit light on the open side of the U. This open side is mostly closed by a cover element which is particularly optically effective, ie is designed with a lens effect to ensure a directional emission characteristic of the lamp.

With such generic lights, robust light band systems with elongated lights can be implemented. For this purpose, the carrier in the generic type is usually made as a shaped sheet metal part made of metal so that it has the necessary stability. However, the explained construction of generic lights requires a complicated production and a high space requirement within the carrier. This is because further components, in particular electrical supply lines, must be arranged on the side of the printed circuit card facing the base section, this arrangement being such that these additional components do not cover the light sources on the side of the printed circuit board facing away from the base section of the carrier and thus the Do not impair light emission. Conventional luminaires therefore usually have a complicated base body structure within the carrier, to which the circuit board and the other components of the luminaire are attached. Out DE 20 2014 101 310 U1 Furthermore, an LED module for mounting on a flat support element, which is designed in particular as a facade element, is known which has a housing with a light emitting element in which LEDs are arranged, the housing of the LED module being fastened to the flat support element can that its light-emitting element dips into a recess of the carrier element. Out US 2013/0021797 A1 For example, a lighting device integrated in a box is known in which an LED board is mounted with its rear side on an inner wall of the box, a flat optical element being arranged on the front of the LED board and being held on the box by means of a holding element, so that the LEDs emit light through the optical element into the interior of the box. From the documents US 2011/0103051 A1 and KR 10-1284261 B1 For example, LED modules are disclosed in which an LED board is attached to the base of a module housing, this floor according to US 2011/010051 A1 is designed as a heat sink, wherein a cover with a U-shaped cross-section is attached to the bottom of the module housing and this cover has openings to which the LEDs of the boards are aligned, with an intermediate layer being arranged between the LED board and the cover, which extends between the LEDs and their respective associated openings in the cover.

The present invention is based on the object of providing a luminaire which can be produced as simply and inexpensively as possible and which in particular at least partially eliminates at least one of the above-mentioned problems of conventional luminaires. Furthermore, the invention is based on the object of providing a method for producing a lamp by means of which the lamp can be produced as simply and inexpensively as possible and in particular at least one of the above-mentioned problems in conventional lamps is at least partially eliminated.

As a solution to the problem on which the invention is based, the invention proposes a luminaire according to claim 1. The luminaire comprises a printed circuit board and a carrier, the carrier having a U-shaped cross section with a bottom section and two side sections. The printed circuit card has a flat luminous side on which a plurality of light sources, in particular LEDs, are arranged in a light source arrangement, the printed circuit card is fixed in a fixing position on the carrier and is arranged on a flat section which is formed by the bottom section, an inner side of the carrier, and wherein on a side of the printed circuit board facing away from the lighting side in the carrier, electrical supply lines as further components of the lamp are arranged. Corresponding holding elements can be provided for this purpose, for example rivet, locking or screw elements and / or adhesives. The circuit card can be designed, for example, as a conventional circuit board with conductor tracks on which light sources, in particular LEDs, are arranged. In general, the printed circuit card can be designed in the manner of a plate with a small height in a first spatial direction and a significantly greater extent, in particular in each case at least twenty times greater extent in the two other spatial directions. The printed circuit card can thus generally have a considerable two-dimensional extension perpendicular to its height, the printed circuit card having two sides with the considerable two-dimensional extension, one of the two sides being designed as the luminous side. In one embodiment, the printed circuit card also has additional light sources on the side opposite the luminous side with the considerable two-dimensional extension.

According to the invention, in the fixing position, the printed circuit card points with its luminous side towards the flat section of the carrier. The printed circuit card is thus held on the carrier via appropriately provided holding elements in such a way that its luminous side faces the flat section of the carrier and thus does not point away from the carrier for emitting light away from the carrier but rather toward the inside of the carrier. The flat section has a leadthrough arrangement with at least one leadthrough. The light source arrangement and the lead-through arrangement correspond to one another in such a way that one Majority of the light sources, each light source is arranged in a respective one of the at least one passage of the lead-through arrangement for radiating light away from an outside of the carrier. The implementations lead from the Inside to outside of the wearer. The leadthrough arrangement can comprise one or more leadthroughs. If the leadthrough arrangement comprises only one leadthrough, the majority of the light sources are arranged in this leadthrough. If the leadthrough arrangement comprises several leadthroughs, then these are arranged in relation to one another in the leadthrough arrangement and aligned with the light sources in such a way that the majority of the light sources are each arranged in one of these leadthroughs. A plurality of light sources, which differ from one another in terms of their light color, are particularly preferably arranged in at least one of the at least one bushings. The term “majority of the elements” of course includes “all of the elements”.

The luminaire according to the invention can thus be manufactured in a very simple, inexpensive and robust manner. This is because the circuit card can be placed on the inside of the carrier, while the light sources are arranged on their luminous side in the feedthroughs of the carrier so that the light sources can emit light on the outside of the carrier. On the one hand, this makes it possible to fix the printed circuit card on the inside of the carrier in a particularly simple manner, with the printed circuit card lying directly or indirectly against the carrier with a substantial proportion of the area of its luminous side, particularly in the fixing position. In the case of direct contact, the luminous side of the printed circuit card is in direct contact with the carrier; in the case of indirect contact, the luminous side of the printed circuit board is in contact with an additional element which is then in contact with the carrier. In particular, more than 50% of the area of its luminous side, in particular more than 70% of this area, lies against the carrier. On the other hand, additional components, such as supply lines, for example, can be placed in the carrier in a simple manner on the side of the circuit card facing away from the luminous side are arranged without complex fixing elements having to be provided in the carrier for this purpose. This is because the design of the lamp according to the invention ensures that the light sources which are arranged in the feedthroughs in the carrier and can thus emit directly to the outside cannot be covered by other components of the lamp.

In one embodiment, a preferably one-piece electrical insulation layer runs in sections, in particular over its entire flat extension or over sections of its flat extension, between the printed circuit card and the carrier to prevent electrical contact between the printed circuit card and the carrier. The provision of the insulation layer can be particularly advantageous because it reliably prevents electrical contact between the printed circuit board, which carries current per se for supplying the light sources arranged on it, and the carrier, which usually represents at least the section of a touchable housing of the lamp can. This is particularly advantageous when the carrier is formed from a conductive material such as a sheet of metal. In general, for reasons of stability, the design of the carrier from a formed sheet metal is particularly advantageous, which is why the provision of the insulation layer brings additional advantages. In the embodiment described, the printed circuit card is therefore in direct contact with the carrier, the insulation layer in particular representing the additional element or being part of the additional element which is arranged between the printed circuit card and the carrier. The insulation layer can be designed, for example, as a film or as a potting piece. For example, the insulation layer can have cutouts which are aligned with the feedthroughs provided in the carrier, so that the light sources pass through the insulation layer into the Extend bushings. For example, the insulation layer can extend over the light sources, the insulation layer being transparent in particular in the areas in which it extends over the light sources. The insulation layer is preferably transparent in such a way that it has a transparency of over 70%, in particular over 90%, for light in a wavelength range between at least 500 to 650 nm. Particularly preferably, the insulation layer has a plurality of bulges which are arranged in a bulge arrangement which corresponds to the lead-through arrangement in such a way that each light source of at least the majority of the light sources is arranged under a corresponding bulge and is arranged in a corresponding lead-through. The insulation layer is preferably made in one piece, in particular from a single material. The luminaire preferably has several insulating layers formed in one piece, each of which runs between the printed circuit board and the carrier and preferably extends over the light sources, whereby these insulating layers can then be arranged next to one another and each prevent electrical contact between the carrier and printed circuit card. The carrier is generally preferably designed in one piece. Generally preferred, the printed circuit card is designed in one piece. According to the invention, the insulation layer is designed and arranged in such a way that it prevents electrical contact between the carrier and printed circuit board and hinders light emission from the light sources away from the outside of the carrier as little as possible. In particular, the insulation layer is designed in such a way that it ensures a resistance of over 1 MΩ, in particular over 2 MΩ, between the printed circuit card and the carrier. In particular, the insulation layer is designed in such a way that it ensures a voltage capability of over 1.5 kV between the printed circuit board and the carrier.

In one embodiment, the insulation layer is designed as an insert component that is placed on the luminous side of the printed circuit card and is fixed to the carrier via the printed circuit card. For example, the insulation layer can be fixed to the carrier solely by the circuit card, so that no further fixing means is provided for fixing the insulation layer to the carrier. In one embodiment, a separate fixing means can also be provided for fixing the insulation layer on the carrier and / or the circuit card. The formation of the insulation layer as an insert component, which is placed on the luminous side of the printed circuit board and is fixed to the carrier via the printed circuit board, enables the lamp to be manufactured in a particularly simple and inexpensive manner. In addition, a modular structure of the lamp can be particularly simplified. For example, different insulation layers can be provided for different purposes, for example transparent or colored insulation layers or insulation layers with special optical effects that simultaneously extend over the light sources on the luminous side of the circuit board. With a corresponding production of the lamp, the insulation layer can be placed on the luminous side of the printed circuit board in a production step or placed on the inside of the carrier, after which the printed circuit board is then placed on the inside of the carrier in a subsequent production step, while the insulation layer is between the PCB and the carrier is located. In one embodiment, the luminescent side of the printed circuit card presses against the insulation layer, the insulation layer pressing against the flat section of the carrier. The pressing takes place at least in sections. The pressing can take place directly or indirectly, ie the circuit card can press directly or indirectly against the insulation layer and the insulation layer can press directly or indirectly against the flat section of the carrier. Of course, this is based on the fixing position of the circuit board.

In one embodiment, the insulation layer extends in sections over the light sources and into the feedthroughs, the insulation layer having at least one optically active section, with each of the light sources being arranged on an optically active section assigned to it in a majority of the light sources. In the embodiment described, an optically effective section of the insulation layer thus extends in each case over a light source; H. along a light source on its side, on which it emits light that radiates away from the outside of the wearer. The optically effective sections are thus arranged in a section arrangement which corresponds to the light source arrangement and to the lead-through arrangement. The respective section which is assigned to the respective light source is designed to be optically effective; H. can function as an optical lens by means of which a widening or bundling of the light emitted by the light source, in particular a targeted steering of the light emitted by the light source into a predetermined solid angle, is ensured. For example, the optically effective section can be designed as a free-form lens. In the embodiment described, the insulation layer thus functions not only as an electrical protective layer but at the same time as an optical control means, as a result of which the radiation property of the lamp can be further optimized in a very cost-effective manner.

The optically effective section particularly preferably extends through the at least one passage and protrudes on the outside of the carrier. At least that a light source assigned to the optically effective section is arranged relative to the optically effective section and the optically effective section is designed so that at least 70%, in particular at least 80%, in particular at least 90% of the light intensity of light emitted from the assigned light source in the optically effective section arrives, is emitted with an emission direction which forms an angle of less than 40 °, in particular less than 20 °, in particular less than 10 ° to the outside of the carrier. The outside of the carrier is of course placed on the side of the carrier from which light is emitted in the lamp according to the invention. A person skilled in the art is familiar with various design options for the correspondingly designed optically effective section, for example, appropriately shaped cavities for guiding light can be provided in the optically effective section, for example the optically effective section can have appropriately designed interfaces for light guiding. In one embodiment, the lamp extends in a longitudinal direction and in a transverse direction, the extension length of the lamp in the longitudinal direction being a multiple, in particular at least five times, in particular at least ten times the extension in the transverse direction. The light source arrangement comprises a plurality of light sources arranged offset from one another in the longitudinal direction. In the embodiment mentioned, the optically effective section is designed and arranged relative to the assigned light source so that at least 70%, in particular at least 90% of the light intensity of light that reaches the optically effective section from the assigned light source is emitted in one direction which has an angle of at least 45 ° to the longitudinal direction. The particularly advantageous embodiments mentioned have the particular advantage that the essential portion the light intensity of the light emitted by a light source is emitted at a small angle to the outside of the carrier, so that the emission of light by the luminaire is hardly affected by objects that are arranged close to the outside of the luminaire. A corresponding design of the lamp can be particularly advantageous if the lamp is attached to an object, for example the wall or ceiling of a room, in such a way that its outside faces the object. Because in the particularly preferred embodiment, the lamp can then also emit a substantial proportion of the light intensity emitted by it into the room. In addition, when a substantial portion of the light intensity is emitted at an angle of more than 45 ° to the longitudinal direction of the lamp, a particularly good emission efficiency of the lamp can be guaranteed. It has to be taken into account that the extension of the lamp in the transverse direction is significantly smaller than in the longitudinal direction, so that a significantly larger proportion of the light emitted by the lamp actually reaches the room when the substantially larger proportion is radiated essentially in the transverse direction becomes.

In one embodiment, a light-guiding plate is arranged on the outside of the carrier, which plate has at least one light-guiding section which is assigned to one of the at least one feedthrough and the light source arranged in the feedthrough. On the one hand, the light-directing plate can ensure protection of the light sources arranged in the bushings. On the other hand, a predetermined radiation characteristic of the lamp can be set via the light-directing plate. The light-directing plate is attached to the outside of the carrier. For example, the plate can have a latching hook that is inserted into one on the outside of the carrier provided hole engages. For example, the light-directing plate can have latching projections on its edges, with which it engages behind retaining projections provided on the side walls of the carrier. For example, the light-directing plate can be screwed to the outside of the carrier. The light-directing plate can for example be made of PMMA, for example as an extruded component or a component made by injection molding. The latching hooks or latching projections can be integrated in one piece in the light-directing plate. Particularly preferably, the light-directing plate is designed and arranged relative to at least one light source assigned to it that at least 70% of the light intensity of light that reaches the light-directing plate from the assigned light source is emitted with an emission direction that has an angle of less than 40 °, in particular less than 20 °, in particular less than 10 ° to the outside of the carrier. The advantages described above with reference to the corresponding design of the optically effective section of the insulation layer can be implemented. As explained above, the light-directing plate can particularly preferably be designed in such a way that at least 70% of the light intensity of the light that enters it from the associated light source is emitted with an emission direction that is at an angle of at least 45 ° to the longitudinal direction of the Has luminaire.

In one embodiment, the luminaire has a light-directing element on the outside of its support, which ensures that at least 70% of the light intensity of light that is emitted by the light sources arranged on the light side of the circuit board is emitted in an emission direction that forms an angle of less than 40 °, in particular less than 20 °, in particular less than 10 °, to the outside of the carrier on which the at least one bushing is provided with a light source arranged in it, and in particular forms an angle of at least 45 ° to the longitudinal direction of the lamp. The light-directing element can be implemented, for example, by the optically active section or by the light-directing plate or by the interaction of the optically-active section with the light-directing plate. For this purpose, the optically effective section can, for example, dip into a correspondingly configured and intended cutout in the light-directing plate, ie, be arranged therein. In the embodiment described, the advantages explained above with regard to ensuring light guidance for realizing a corresponding emission direction are realized. The light-directing element preferably ensures that at least 70% of the light intensity of light that is emitted by the light sources arranged on the luminous side of the circuit board is emitted with an emission direction that has an angle of less than 40 °, in particular less than 20 ° , in particular forms less than 10 ° to the flat extension of the board.

In particular, the light-directing element has a light entry surface which is assigned to a specific group of light sources, which consists of at least one light source, and via which light is coupled into the light-directing element which is emitted from this group of light sources. The light-directing element extends in a transverse direction away from the group of light sources through at least one of the feedthroughs across the outside of the carrier. In general, the transverse direction can be perpendicular to the plane defined by the flat luminous side of the circuit board. The transverse end of the light-directing element lying on the outside of the carrier, ie the end in the transverse direction with which the light-directing element Element protruding the furthest from the outside of the carrier is designed as a transverse end surface. The transverse end surface has a curvature about an axis of rotation which is perpendicular to the transverse direction and in particular parallel to the longitudinal direction of the lamp. Particularly preferably, the light entry surface also has a curvature about an axis of rotation which is perpendicular to the transverse direction and in particular parallel to the longitudinal direction of the lamp. The light-directing element is designed and arranged relative to the group of light sources assigned to it in such a way that light that is coupled from the group of light sources into the light-directing element via its light entry surface and hits the transverse end surface within the light-directing element, at the transverse end surface is totally reflected to a considerable extent, in particular at least 90% of this coupled-in light that hits the transverse end surface is totally reflected. The light entry surface and the transverse end surface are aligned with one another and the light-directing element is arranged in relation to the group of light sources assigned to it in such a way that at least 70%, in particular at least 90% of the light that is coupled into the light-directing element by the group of light sources, propagates in the light-directing element in a direction of propagation perpendicular to the transverse direction and exits the light-directing element with a direction of propagation which forms an angle of less than 40 °, in particular less than 20 °, in particular less than 10 °, to the outside of the carrier, the Propagation direction in particular forms an angle of at least 50 ° to the transverse direction, in particular at least 70 °, in particular at least 80 ° to the transverse direction.

In particular, the light-directing element has a Light entry surface on a light entry side and a light exit side, which are spaced from one another in a transverse direction. Light from at least one of the light sources is coupled into the light-directing element via the light entry surface. The light entry surface lies in a transverse direction, which is perpendicular to the transverse direction, between two interfaces of the light-directing element. The two boundary surfaces run over a transverse section between the light entry side and the light exit side and each have a curvature about an axis of rotation that runs perpendicular to the transverse direction and perpendicular to the transverse direction. In one embodiment, the boundary surfaces run directly from the light entry surface in the direction of the light exit side. In one embodiment, the extension length of the transverse section in the transverse direction is at least 30%, in particular between 30% and 90%, in particular between 50% and 80% of the maximum distance between the light entry side and light exit side, which corresponds in particular to the extension length of the light-directing element in the transverse direction. In one embodiment, the boundary surfaces are curved over a substantial area of the transversal section, for example each over at least 50% of the transversal extent of the transversal section. The curvature in each case refers to a curvature about an axis of rotation that runs perpendicular to the transverse direction and perpendicular to the transverse direction. Of course, in one embodiment, different sections of the boundary surfaces can be curved around different axes of rotation assigned to them, each of which runs parallel but is spaced from one another. In one embodiment, the interfaces each exclusively have a curvature around at least one Axis of rotation, with all axes of rotation around which the curvature takes place running parallel, whereas in another embodiment further curvatures are also provided around other axes of rotation which are angled. The light-directing element is designed and arranged relative to the light sources in such a way that a portion of the coupled-in light hits the interfaces, with at least 90% of this portion being totally reflected at the interfaces and thus not exiting the optical element. In one embodiment, the proportion of the coupled-in light that strikes the interfaces is at least 20%, in particular at least 50%, in particular at least 70% of the light, the proportion being based on the light intensity.

According to the invention, the insulation layer has flat sections which are arranged between the carrier and the printed circuit board, as well as optically effective areas which extend into the bushings. For example, the optically effective areas extend into the feedthroughs and end inside the carrier. For example, the optically effective areas extend through the feedthroughs from the inside to the outside of the carrier. For example, the optically effective areas can be designed in the manner of a section of an ellipsoid, in particular an ellipsoid of revolution, in particular a sphere. The optically effective areas can be identical to the optically effective sections described. The optically effective areas can each have a light-directing function. By designing the insulation layer with flat sections and non-flat, optically effective areas arranged between the flat sections, on the one hand an optical function of the insulation layer and on the other hand a reliable attachment of the printed circuit board and insulation layer to the carrier can be achieved in a simple manner be realized.

In one embodiment, a plurality of protruding domes are provided on the outside of the carrier outside the area of the at least one passage in the flat section, the domes protruding so far on the outside and being distributed around the at least one passage that a flat Element which is placed on the outside of the carrier, is always spaced from the light sources arranged in the at least one passage, and in particular from the insulation layer arranged in the at least one passage. The planar element, which is an external element independent of the lamp, can be in contact with at least three domes at the same time. By providing the domes, damage to the light sources or to the sections of the insulation layer extending over the light sources can be effectively prevented, for example during the transport of the lights, during which they are often connected to the outside of the carrier in which the bushings are provided, be placed on flat surfaces. In this way, when the lamp is mounted on a flat element, such as a ceiling, via the carrier, it can also be ensured that the light sources are spaced sufficiently far from the flat element. For example, all areas of the flat section of the carrier in which bushings are arranged in which light sources are arranged can run together in one plane, while the domes protrude perpendicular to the extent of this plane from the plane, in particular by at least 2 mm, in particular by at least Protrude 5 mm.

Particularly preferably, additional elevations are provided on the luminous side of the printed circuit board, which are arranged in an elevation arrangement, the domes in one Dome arrangement are arranged. The light source arrangement, elevation arrangement, leadthrough arrangement and dome arrangement correspond to one another in such a way that of a majority of the elevations each elevation is arranged in a dome, while at the same time the majority of the light sources are arranged in one of the at least one penetration. In the embodiment described, for example, particularly good guidance of the printed circuit board and in particular the insulation layer relative to the carrier can be ensured by arranging the elevations in the domes. As a result, the fixation of the printed circuit card and in particular the insulation layer to the carrier can be particularly preferred. The arrangements that correspond to one another ensure that the light sources are arranged in feedthroughs at the same time, while the elevations are arranged in domes. In particular, the insulation layer can have a plurality of receptacles which are designed to receive the elevations and are arranged in a receptacle arrangement corresponding to the elevation arrangement and the dome arrangement, the domes being designed to receive the receptacles of the insulation layer.

In one embodiment, the printed circuit board is designed as a circuit board, one side of which is designed as the luminous side on which the light sources and conductor tracks are arranged. The board has at least one electrical connection element for contacting the conductor tracks, the electrical connection element running from the luminous side through the board to the opposite side of the board and being designed to receive electrical leads from the opposite side of the board. The electrical connecting element can, for example, as a connecting terminal, insulation displacement device or by be realized soldered, screwed or connected via a sliding contact cable ends. The electrical connection element always ensures the electrical connection of the board to electrical supply lines. This embodiment reliably ensures that electrical contact can be made with the circuit card from the side opposite the luminous side, so that all additional components can be arranged on the side of the board facing away from the luminous side, so that no additional elements have to be arranged on the luminous side , through which the radiation efficiency of the light sources on the outside of the carrier can be influenced. In addition, this enables the circuit board to be equipped on only one side, which means that the production costs of the lamp can be kept particularly low. The provision of connecting terminals enables the lamp to be mounted particularly easily.

At least one of the elevations is particularly preferably formed by the electrical connection element. This can ensure that the electrical connecting element is received by a corresponding dome, so that it is ensured that the light sources rest as close as possible to the carrier or extend as far as possible into the bushings or through the bushings. In addition, in this embodiment, the particularly good fixation of the circuit card to the carrier is realized in a particularly simple manner, since the electrical connection element provided in any case also serves as an elevation that is received in a dome to ensure a particularly advantageous fixation of the circuit card on the carrier. In particular, a plurality of electrical connection elements can be provided on a printed circuit card, each electrical connection element being arranged in one of the domes.

In one embodiment, the housing of the luminaire consists of the carrier and the at least one circuit card, the carrier being designed in particular as the insulation layer. In this embodiment, the carrier itself can provide electrical insulation for the printed circuit board. In one embodiment, the housing of the luminaire consists of the carrier, the printed circuit board and the at least one insulation layer, which is a component that is independent of the carrier. The luminaire can include several circuit cards and in particular several insulation layers. Of course, the luminaire also always has control and power supply units, such as supply lines or ballasts. However, the luminaire has no further housing elements or optical elements, i. H. no further components required for the mechanical design of the luminaire. It should be taken into account that a lamp always has a housing to which the components of the lamp, in particular power supply lines, are attached and which limits the geometric extension of the lamp. In the embodiment according to the invention, this housing is represented by the carrier and the printed circuit board and, in particular, the separately provided insulation layer. In one embodiment, the luminaire consists of a carrier, printed circuit board and, in particular, an insulation layer as well as control and supply units. The side of the printed circuit card facing away from the luminous side is particularly preferably designed to be electrically insulating. As a result, the lamp can be manufactured very easily and at the same time meet the electrical safety standards.

Particularly preferably, the insulation layer and / or the carrier and / or the printed circuit board on which the light sources are arranged are formed in one piece, ie from a piece that is cohesively connected. The insulation layer and / or the carrier are particularly preferred a one-piece, coherent component produced directly. The luminaire particularly preferably has a plurality of circuit cards, the carrier having a plurality of lead-through arrangements each configured identically. In this embodiment, the feedthrough arrangement represents a pattern of feedthroughs that is repeated in the carrier. Exactly one printed circuit board is arranged on a plurality of the patterns, ie the lead-through arrangements. This embodiment is particularly suitable for the production of long light strip systems, the aforementioned configuration of the carrier, together with the use of a large number of printed circuit cards, enabling a modular structure and thus cost-effective production of the light.

According to the invention, in addition to the light sources arranged on the luminous side of the printed circuit board, the lamp has further light sources which are arranged on the side opposite the luminous side of the printed circuit board and which emit light away from the printed circuit board. These further light sources can, for example, be arranged directly on the circuit board on which the light source arrangement is arranged. In one embodiment, a further printed circuit card is provided on which the further light sources are arranged, the further printed circuit card being arranged on the side of the printed circuit card opposite the luminous side. In this embodiment, a luminaire can be provided in a particularly simple manner, which simultaneously provides indirect lighting and direct lighting in a room. For example, in this embodiment, the luminaire can be mounted with the outside of the carrier facing a component, such as a wall or a ceiling of a room, so that the light sources arranged on the luminescent side have a Ensure indirect lighting of the room, while the other light sources ensure direct lighting of the room. For this purpose, the luminaire can in particular have an optical steering element on its side opposite the outside of the carrier in which the bushings are provided, which can be provided in particular in a cover element for covering the carrier, thereby ensuring direct lighting with a predetermined radiation characteristic can be. The optical steering element can in particular have such a configuration as the light-directing element described above, the optical steering element being assigned to at least one of the further light sources, in particular all further light sources, and being designed so that the light emitted by the further light source or sources is Light entry surface is coupled.

The invention also relates to a method for producing a lamp. In the method according to the invention, a printed circuit card is placed with its flat luminous side on which light sources are arranged on a flat section of a carrier and is fixed to the carrier. A majority of the light sources each light source is arranged in a feedthrough provided in the flat section of the support, the support having a U-shaped cross-section with a bottom section and two side sections and the flat section of the support through the bottom section is formed, and in addition to the light sources arranged on the luminous side of the printed circuit board, further light sources are provided which are arranged on the side of the printed circuit board facing away from the luminous side so that they emit light away from the printed circuit board. In particular, the printed circuit board with its luminous side on the inside of the Arranged carrier, wherein the light sources are arranged in the bushings that they extend into the bushings and are therefore arranged so that they can emit light on the outside of the carrier. According to the invention, an insulation layer, which has flat sections and optically effective areas, is arranged between the printed circuit board and the carrier and extending over the light sources in such a way that the flat sections are arranged between the carrier and the printed circuit board and that the optically effective areas extend into the at least a passage, in particular from the inside to the outside of the carrier extend through the at least one passage. In particular, the insulation layer can be designed and arranged between the printed circuit card and the carrier in such a way that it prevents electrical contact between the printed circuit card and the carrier when the printed circuit card is arranged in its fixing position on the carrier. In the method according to the invention, the insulation layer is particularly preferably placed on the luminous side of the printed circuit card or placed on the inside of the carrier, after which the printed circuit board is then placed with its luminous side on the carrier and is fixed to the carrier.

Figur 1:

in einer Prinzipdarstellung einen Ausschnitt einer Ausführungsform einer erfindungsgemäßen Leuchte;

Figur 2:

in einer Prinzipdarstellung einen Ausschnitt des Trägers der Ausführungsform gemäß Figur 1;

Figur 3:

in einer Prinzipdarstellung eine Leiterkarte der Ausführungsform gemäß Figur 1;

Figur 4:

in einer Prinzipdarstellung eine Isolationsschicht der Ausführungsform gemäß Figur 1;

Figur 5:

in einer Prinzipdarstellung eine Anordnung von Isolationsschicht und Leiterkarte, die in der Ausführungsform gemäß Figur 1 angeordnet ist.

Figur 6:

in einer Prinzipdarstellung einen Ausschnitt einer weiteren Ausführungsform einer erfindungsgemäßen Leuchte;

Figur 7:

in einer Prinzipdarstellung einen Ausschnitt einer weiteren Ausführungsform einer erfindungsgemäßen Leuchte.

The invention is explained in more detail below with reference to seven figures. Show it:

Figure 1:

in a schematic diagram of a section of an embodiment of a lamp according to the invention;

Figure 2:

in a schematic diagram of a section of the carrier according to the embodiment Figure 1 ;

Figure 3:

in a schematic diagram of a circuit board according to the embodiment Figure 1 ;

Figure 4:

in a schematic diagram an insulation layer according to the embodiment Figure 1 ;

Figure 5:

in a schematic diagram of an arrangement of insulation layer and printed circuit board, which in the embodiment according to Figure 1 is arranged.

Figure 6:

in a schematic diagram a section of a further embodiment of a lamp according to the invention;

Figure 7:

in a schematic diagram a section of a further embodiment of a lamp according to the invention.

In Figure 1 a section of a lamp 1 according to the invention is shown in a schematic diagram. The lamp 1 according to the invention comprises a carrier 3. The carrier 3 has a substantially U-shaped cross section with a bottom section and two side sections and extends perpendicular to the cross section over a considerable length. The flat section of the carrier 3, on which the circuit card 2 is arranged in its fixing position, is formed over the bottom section. An insulation layer 4 is arranged between the printed circuit card 2 and the flat section of the carrier 3. The circuit board 2, which is in Figure 3 is shown in more detail, has a luminous side on which LEDs 21 are arranged as light sources. The luminescent side of the printed circuit card 2 is pressed in sections against the insulation layer 4, which in turn is pressed in sections against the flat section of the carrier 3. The insulation layer 4 extends over the LEDs 21 of the printed circuit card 2. Out Figure 1 it can be clearly seen that the LEDs 21 extend into the bushings of the carrier 3, and that the insulation layer 4 extends over the LEDs 21 and through the bushings of the carrier 3. The lamp 1 according to Figure 1 furthermore has a cover element which closes the carrier 3 on the open side of the U-shaped cross section. At the in Figure 1 Light 1 shown are arranged on the side facing away from the light side of the circuit board 2 additional light sources which emit light through the cover element. The lamp 1 according to Figure 1 is thus designed to ensure direct and indirect lighting at the same time. In other embodiments, the lamp 1 does not have a cover element on the open side of the U-shaped cross section of the carrier 3, but the housing of the lamp 1 consists of the elements carrier 3, printed circuit board 2 and insulation layer 4, with otherwise only additional electrical components for Power supply and Control of the circuit boards 2 with their light sources are included in the lamp 1.

In the Figures 2 to 5 are the essential components of the lamp 1 according to Figure 1 , namely printed circuit board 2, carrier 3 and insulation layer 4, shown in schematic representations. Out Figure 2 the carrier 3 can be seen in more detail. The carrier 3 has several lead-through arrangements with lead-throughs 31 and several dome arrangements with domes 32. In each case one dome arrangement is assigned to a lead-through arrangement. With lamp 1 according to Figure 1 a printed circuit board 2 is in each case arranged on a lead-through arrangement with lead-throughs 31 and the dome arrangements with domes 32 assigned to it. With lamp 1 according to Figure 1 Thus, several circuit cards 2 are arranged on a carrier 3.

The circuit boards 2 of the lamp 1 according to Figure 1 are designed as a circuit board. The circuit board has connecting terminals 22 as electrical connecting elements which are inserted through the printed circuit card 2 in such a way that they enable contact to be made with the luminous side from the side of the printed circuit card 2 opposite the luminous side. For this purpose, the connecting terminals 22 have terminal accesses 220 for supply lines on the side of the printed circuit board 2 opposite the lighting side. Out Figure 3 it can also be seen that a plurality of LEDs 21 are arranged in a light source arrangement on the light-emitting side of the printed circuit board 2, which with the lead-through arrangement of the lead-throughs 31 of the carrier 3 according to FIG Figure 2 corresponds. For simplicity, in Figure 3 further components of the printed circuit card 2, such as, for example, conductor tracks, are not shown.

Out Figure 4 is that in the lamp 1 according to Figure 1 used insulation layer 4 can be seen in more detail. The insulation layer 4 is designed as an insert component, in the present case as a potting piece. In other embodiments, can the insulation layer can also be designed as an insulation film, for example. In the present case, the insulation layer 4 is transparent and has a multiplicity of optically effective sections 41 which are arranged in a section arrangement which corresponds to the lead-through arrangement and to the light source arrangement. In addition, the insulation layer 4 according to FIG Figure 4 a plurality of receptacles 42, which are arranged in a receptacle arrangement which corresponds to the dome arrangement of the domes 32 of the carrier 3. The insulation layer 4 can thus as in Figure 5 shown are placed on the luminous side of the circuit board 2, so that the LEDs 21 are each located within the optically effective sections 41 and the connecting terminals 22 are each located within the receptacles 42. The insulation layer 4 has more receptacles 42 than the printed circuit card 2 has connecting terminals 22. In the Figure 5 The arrangement shown comprising the circuit card 2 and the insulation layer 4 placed on it can then be applied to the inside of the carrier 3 as in FIG Figure 1 are placed and fixed to the carrier 3, with one LED 21 and the optically effective section 41 assigned to it extending into a feed-through 31 of the carrier 3, and one connecting terminal 22 each extending together with a receptacle 42 into a dome 32 of the carrier 3, in the present case all domes 32 each receiving a receptacle 42 of the insulation layer 4.

It is apparent to a person skilled in the art that the inventive arrangement of circuit card 2, insulation layer 4 and carrier 3 ensures that circuit card 2 and insulation layer 4 are very well fixed to carrier 3 and, moreover, that there is electrical contact between circuit card 2 and carrier 3 the insulation layer 4 is effectively prevented. In addition, it is apparent to the person skilled in the art that due to the Design of the insulation layer 4 with optically effective sections 41, which act like an optical lens, at the same time effective influence can be exerted on the radiation characteristics of the lamp 1, so that the lamp 1 according to the invention can be produced with simple means so that it has a predefined radiation characteristic having.

In the Figures 6 and 7th sections of further embodiments of a lamp 1 according to the invention are shown, the lamps 1 each being shown in an assembly position in which they rest against a ceiling element 100 of a room. The two different embodiments according to Figure 6 and Figure 7 each have, as explained above, a carrier 3 as well as an insulation layer 4 and a printed circuit card 2 on which LEDs 21 are arranged. An LED 21 is arranged in a lead-through of the carrier 3 assigned to it. Furthermore, the in Figure 6 and 7th The various embodiments shown each have a light-directing element which is arranged on the outside of the carrier 3 and which is designed and arranged relative to the associated light source 21 such that at least 80% of the light emitted by the light source emerges from the luminaire with an emission direction, which forms an angle of less than 20 ° to the outside of the carrier 3 and of less than 20 ° to the flat extension of the luminous side of the printed circuit card 2. In the embodiment according to Figure 6 the light-directing element is formed by a light-directing plate 60 which is arranged on the outside of the carrier 3. The lamp 1 according to the invention is intended according to Figure 6 with its light-directing plate 60 mounted on a ceiling element 100, the light-directing plate 60 ensuring that a substantial proportion of the light emitted by the light sources 21 of the lamp 1 between the ceiling element 100 and the carrier 3 from the light-directing plate 60 exits. In the embodiment according to Figure 7 the light-directing element 60 is formed by an optically effective section 50 of the insulation layer 4. The lamp 1 is intended according to Figure 7 with its light-directing element 60 mounted adjacent to a ceiling element 100, the light-directing element 60 ensuring that at least 80% of the light emitted by the light sources 21 emerges from the luminaire 1 between the ceiling element 100 and the carrier 3. The light-directing elements 60 of the embodiment according to Figure 6 and 7th each have a transverse end surface that is curved around an axis of rotation that runs perpendicular to the transverse direction, the transverse direction being perpendicular to the flat extension of the printed circuit board 2 and the insulation layer 4 extending in the transverse direction through the opening of the carrier 3. A corresponding design of the transverse closing surface of the light-directing element 60 including the alignment of the transverse direction is generally advantageous. Furthermore, the light-directing element 60 of both embodiments each has a light entry surface which is designed as a smooth surface which has a curvature about an axis of rotation that is perpendicular to the transverse direction mentioned. The person skilled in the art can see that the light-directing element 60 ensures the described alignment of the light emitted by the LEDs 21 through the relative arrangement of the light-directing element 60 to the LEDs 21 and through the relative arrangement and configuration of the light entry surface and the transverse end surface, so that the Radiation direction lies in the specified angular range.

List of reference symbols

1

lamp

2

Circuit board

3

carrier

4th

Insulation layer

21st

LED

22nd

electrical connector

31

execution

32

Dom

41

optically effective section

42

admission

50

optically effective section

60

light directing plate

100

Ceiling element

220

Clamp access

Claims (12)

1. Lamp (1) comprising a circuit board (2) and a holder (3), wherein the holder (3) has a U-shaped cross section with a bottom portion and two side portions, wherein the circuit board (2) has a two-dimensional lighting side where a plurality of light sources (21) are arranged in a light source array, wherein the circuit board (2), in a fixing position, is fixed to the holder (3) and is arranged on a two-dimensional portion of the inner side of the holder (3) which is formed by the bottom portion, and wherein the circuit board (2), in the fixing position, points with its lighting side towards said two-dimensional portion of the holder (3), wherein the two-dimensional portion has a passage arrangement with at least one passage (31), wherein the light source array and the passage arrangement correspond to each other in such a way that each light source (21) of a majority of light sources (21) is arranged in a respective one of said at least one passage (31) of the passage arrangement to radiate light away from an outside of the holder, wherein a one-piece electrical insulation layer (4) runs in sections between the circuit board (2) and the holder (3) and extends across the light sources, wherein the insulating layer (4) has plane portions which are arranged between the holder (3) and the circuit board (2), as well as optically effective portions which extend into said at least one passage (31), in particular from the inner side to the outside of the holder (3) through said at least one passage (31),
   characterized in that
   the lamp (1) comprises further light sources in addition to the light sources (21) arranged on the lighting side of the circuit board (2), which further light sources are arranged at the side of the circuit board (2) opposite the lighting side and radiate light away from the circuit board (2).
2. Lamp (1) according to claim 1,
   characterized in that
   the insulation layer (4) is designed as an insert component that is placed on the lighting side of the circuit board (2) and is fixed to the holder (3) via the circuit board (2), wherein in particular the circuit board (2) presses with its lighting side against the insulating layer (4) and presses the insulating layer (4) against the two-dimensional portion of the holder (3).
3. Lamp (1) according to any of the preceding claims,
   characterized in that
   the insulating layer (4) extends in sections across the light sources (21) and into the at least one passage (31), wherein the insulating layer (4) hast at least one optically effective portion (41), wherein in a majority of the light sources (21) each of the light sources (21) is respectively arranged on an optically effective portion (41) associated with it.
4. Lamp (1) according to claim 3,
   characterized in that
   the optically effective portion (41) extends through said at least one passage (31) an protrudes beyond the holder (3) at the outside of the holder (3), wherein the at least one light source (21) associated with the optically effective portion (41) is arranged relative to the optically effective portion (41) and the optically effective portion (41) is designed such that at least 70% of the light intensity of light entering the optically effective portion (41) from the associated light source (21) is radiated with a radiation direction forming an angle of less than 40°, in particular less than 10° to the outside of the holder (3).
5. Lamp (1) according to any of the preceding claims,
   characterized in that
   the optically effective portions are especially designed in the manner of a segment of an ellipsoid, in particular a rotational ellipsoid, in particular a ball.
6. Lamp (1) according to any of the preceding claims,
   characterized in that
   a light-directing plate is arranged on the outside of the holder (3), which plate has at least one light-direction portion which is associated with one of said at least one passages and is associated with the light source (21) arranged in -the passage.
7. Lamp (1) according to any of the preceding claims,
   characterized in that
   a plurality of protruding domes (32) are provided on the outside of the holder (3) outside the region of the at least one passage (31) in the two-dimensional portion, wherein the domes (32) protrude on the outside so far and are distributed around the passages (31) in such a way that a plane element, which is applied against the outside of the holder (3), is always spaced from the light sources (21) arranged in said at least one passage (31) and especially from the insulating layer (4) arranged in said at least one passage (31).
8. Lamp (1) according to claim 7,
   characterized in that
   on the lighting side of the circuit board (2) additional elevations are provided which are arranged in array of elevations and that the domes (32) are arranged in array of domes, wherein the array of light sources, the array of elevations, the array of passages, and the array of domes correspond to each other in such a way that from a majority of said elevations each elevation is arranged in a dome (32) while at the same time from the majority of light sources (21) each light source is respectively arranged in one of the passages (31).
9. Lamp (1) according to any of the preceding claims,
   characterized in that
   the circuit board (2) is designed as a circuit board whose circuit board inner side is designed as the lighting side on which the light sources (21) and conductor paths are arranged, wherein the circuit board has at least one electrical connecting element (22) for contacting the conductor path, wherein the electrical connecting element (22) runs from the lighting side through the circuit board to the opposite side of the circuit board and is designed for receiving electrical feed lines from the opposite side of the circuit board.
10. Lamp (1) according to claims 8 and 9,
    characterized in that
    at least one of the elevations is formed by the electrical connecting element (22).
11. Lamp (1) according to any of the preceding claims,
    characterized in that
    the housing of lamp (1) consists of the holder (3), the at least one circuit board (2), and especially said at least one insulating layer (4), wherein the side of the circuit board (2) turned away from the lighting side is designed in an electrically insulating manner.
12. Method for manufacturing a lamp (1), wherein a circuit board (2) is placed with its two-dimensional lighting side on which light sources (21) are arranged on a two-dimensional portion of a holder (3) and is fixed to the holder (3), wherein the holder (3) has a U-shaped cross section with a bottom portion and two side portions and the two-dimensional portion of the holder is formed by the bottom portion, and wherein from a majority of the light sources (21) each light source (21) is respectively arranged in a passage (31) which is provided in the two-dimensional portion of the holder (3), wherein a one-piece insulating layer (4), which has plane portions as well as optically effective portions, is arranged between the circuit board (2) and the holder (3) and so as to extend across the light sources in such a way that the plane portions are arranged between the holder (3) and the circuit board (2) and that the optically effective portions extend into the at least one passage (31), in particular from the inner side to the outside of the holder (3) through the at least one passage (31),
    characterized in that
    the lamp (1) comprises further light sources in addition to the light sources (21) arranged on the lighting side of the circuit board (2), which further light sources are arranged on the side of the circuit board (2) opposite the lighting side and radiate light away from the circuit board (2).

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