DE102009058310B4 - LED luminaire insert with light control element - Google Patents

Abstract

Luminaire insert with a light-directing element, the luminaire insert comprising: an elongated carrier element (20) which is set up along its circumference around the longitudinal axis for receiving circuit carriers (30) for LEDs (35) or which has surface sections along its circumference around the longitudinal axis, which are at least partially set up as circuit carriers themselves for LEDs, and a plurality of LEDs (35) which are arranged on at least one of the circuit carriers (30), and wherein the light-directing element, which extends around at least part of the circumference of the carrier element (20) extends in front of the circuit carrier (30), has several segments (41, 41 ', 41 ", 41"'), each segment (41, 41 ', 41 ", 41"') having at least one reflective surface (401 , 402), each of which is assigned to an LED or a row of LEDs which extends transversely to the longitudinal extension of the LEDs, wherein between two opposing reflector surfaces (401, 402) of the light-guiding element a light-scattering or light-refracting element (420, 420 ', 420 ") is arranged.

Description

The present invention relates to an LED luminaire insert with a light-directing element for subsequent installation in luminaires, e.g. in outdoor lights.

The advancing development in the field of LED technology enables an increasing spread of LEDs as light sources in various areas of lighting technology. In particular, bright LEDs also enable use in outdoor lighting, e.g. the traffic route lighting. Up until now, these areas have been dominated by high pressure sodium vapor lamps and high pressure mercury vapor lamps. However, some of these are often environmentally harmful and only have a low level of efficiency in converting electrical energy into light. Furthermore, complex additional optics or reflectors are often necessary for these lamps in order to generate a desired light distribution. In addition, such lamps are generally not dimmable, and the electrical ballasts used have a low level of efficiency.

It is therefore desirable to provide a lighting unit which enables the efficient use of electrical energy and largely dispenses with the use of environmentally harmful materials. It is also advantageous if the lighting means used are dimmable and the light generated can be steered in a simple manner using simple means in order to achieve a desired light distribution. Although alternative lighting systems based on LEDs are already known, it is often not sensible from an economic point of view to replace existing lighting systems, e.g. Street lights, to be completely dismantled in order to replace them with new lighting devices.

US 2009/0097241 A1 discloses an LED lamp with a heat sink. Several LEDs are arranged in strips on a cylindrically symmetrical heat sink. Several reflectors can extend around the arrangement.

The object of the present invention is therefore to improve existing lights, such as are found in particular in the field of outdoor lighting, with the least possible outlay with regard to the more efficient use of energy.

The invention solves the problem by means of a lamp insert according to claim 1.

In one embodiment, the luminaire insert further comprises a structural element which is connected to the carrier element and serves to support the carrier element in the luminaire housing,
at least one electrical operating device (50) for the electrical supply of LEDs and a multiplicity of LEDs which are arranged on at least one of the circuit carriers.

LEDs, including OLEDs, are arranged on the at least one circuit carrier. Furthermore, one or more further electrical components can be arranged on the circuit carriers. In particular, in one embodiment, the circuit carriers can have a sensor, in particular a temperature sensor, for example a temperature-dependent resistor. Furthermore, in one embodiment, the circuit carrier can have a circuit for current regulation. Furthermore, conductor tracks that contact the LEDs and / or electrical components can be arranged on the circuit carriers.

In one embodiment, the circuit carrier can have a cylindrical shape, on the outer surface of which the LEDs are arranged. In this way, an arrangement can be achieved in which the LEDs can emit in different spatial directions. The arrangement of the LEDs influences the overall light distribution of the luminaire.

In a further embodiment, circuit carriers can be used which have an essentially flat surface. A plurality of circuit carriers can be put together in such a way that adjacent circuit carriers are aligned on an edge. When using n circuit carriers, an n-corner can result, in particular in the cross section of the arrangement, the LEDs being arranged on the outside of the n-corner. Such a flat design of the circuit carriers offers the advantage that the LEDs can be attached with the aid of methods such as are known for the provision of flat LED modules. According to one embodiment, the arrangement of circuit carriers forms a uniform n-gon, e.g. a regular hexagon. With a polygon of at least five corners, a relatively uniform light distribution around 360 ° of the luminaire insert can be achieved. The application of conductor tracks and the assembly with other electrical components, e.g. Sensors, is made easier by using circuit boards with a flat surface. In order to provide a light distribution as it is particularly useful in the field of traffic route lighting and, on the other hand, to keep the number of circuit carriers within economic limits, the use of five or six circuit carriers is particularly advisable. A higher number can, in particular, enable a finer angular distribution of the emitted light, but on the other hand requires a higher installation effort.

The circuit carrier can in particular be designed as a printed circuit board (PCB). It can also be designed as a printed circuit board with a metal core (MCPCB) to improve heat dissipation. In a further embodiment, the circuit carrier can have a metallic core which is provided with a dielectric on its surface. In particular, conductor tracks can be arranged on the dielectric. The use of a metallic core made of aluminum is preferred here.

Alternatively, surface sections of the carrier element can itself be designed as circuit carriers. According to one embodiment, metallic conductor tracks are attached to the surface of the carrier element or an electrical insulating layer of the surface of the carrier element.

The circuit carrier can have a matrix of columns and rows in which the LEDs are positioned. In particular the matrix can be uniform e.g. have the same distances in the vertical and / or horizontal direction. In order to be able to vary the distribution density of the LEDs with a given matrix, it is possible in one embodiment to activate or deactivate the LED at one position of the matrix with an electrical bridge. In this embodiment, the circuit carrier can have a uniform arrangement of columns and rows of possible LED connection positions, while the LEDs can be distributed uniformly or unevenly thereon. In one embodiment, possible LED connection positions that are not occupied by LEDs can also be short-circuited with an electrical bridge because a series connection of the ELDs or the LED positions is provided.

In one embodiment, the LEDs can be arranged in such a way that they can be individually contacted from the outside and controlled individually. Furthermore, in some embodiments, the circuit carrier can have external connections which are used in particular to supply electrical energy. These can preferably be designed as a plug connection. In particular, when using several circuit carriers in a lamp insert, an arrangement of the plugs is advantageous in which a parallel or series connection of the individual circuit carriers is possible, in which the means for connection do not cross one another. Furthermore, in one embodiment, the circuit carrier can be provided with a protective coating which serves to protect against moisture. The coating can be designed as a transparent varnish or coating.

In one embodiment, the carrier element can have an outer profile in cross section perpendicular to its longitudinal axis, which profile is similar to the cross section of the arrangement of the circuit carriers. In particular, the carrier element can have an n-cornered cross section. In one embodiment, the carrier element can be a tubular, hollow element, on the outer surface of which the circuit carriers are arranged. In this embodiment, the carrier element can in particular have channels in order to fasten the circuit carriers, for example by means of screws. In a further embodiment, the carrier element can be made solid. Since the heat that arises when the LEDs are operated essentially flows from the LEDs via the circuit carrier to the carrier element, and from this there is a heat flow to the structural element, it is advantageous to use a material for the carrier element which has good thermal conductivity. In particular, the carrier element can comprise aluminum. In further embodiments, the carrier element can comprise iron or copper.

According to one embodiment, at least one circuit carrier can be attached to the carrier element by means of a screwing or clamping device or by means of an adhesive process. In order to create a good thermal contact, a cavity that forms between the circuit carrier and the carrier element can be filled with a thermally conductive material (e.g. a thermal paste).

The invention also provides a structural element. This is used for mechanical stability and the fastening of other components of the lamp insert, in particular the carrier element, in the lamp housing. The use of a metallic material is preferred here. In one embodiment, the structural element can be made of aluminum. The high thermal conductivity of aluminum enables efficient dissipation of the heat generated in the LEDs. Furthermore, the structural element can be provided with outer surfaces via which the thermal energy can be released into the air. Furthermore, aluminum is a relatively low density material, which minimizes the overall weight of the structure. The structural element can also be a cast part or have a construction made of sheet metal.

For simple subsequent installation of the lamp insert, the structural element is also provided with a fastening means in order to fasten the lamp insert to the lamp. In particular, the structural element can have a thread. In further embodiments, other fastening means, such as in particular means for a latching connection, can be provided.

In some embodiments, the carrier element can also have fastening means for a component of the luminaire to be renovated, for example for a lampshade or lamp cover. In particular, a fastening means, such as a threaded pin, can be provided on the carrier element for use in mushroom lamps in order to fasten a roof element of the lamp housing.

Furthermore, the lamp insert can have one or more cover elements. These serve in particular to cover parts of the luminaire insert that are not provided with LEDs or reflectors. The cover elements can be made of a metallic material, in particular aluminum. In addition to a decorative use, the cover elements can also help cool the lamp. In particular, openings for ventilation can be provided. Furthermore, the cover elements can have surface areas which contribute to the dissipation of heat loss to the surrounding air. In a further embodiment, the cover element can be formed in one piece on the structural element. Furthermore, the cover element can have an opening or recess through which the lamp is electrically connected. The opening or recess can also have a cover which is attached to the cover element.

The at least one operating device of the lamp insert is used to supply the LEDs with electricity. In addition to power electronic components, the operating device can also contain logic. In particular, the operating device can also have a control module (e.g. a Siteco Light Control (SLC) module). This results in the particular advantage of being able to control all LEDs together or individual LEDs individually and to be able to program a lighting scenario as required. In this way e.g. over-lighting can be avoided and energy consumption can be reduced. In particular, the use of a control module makes it possible to adapt the lighting level to the actual requirements. This offers advantages in particular with regard to the use of the luminaire insert in traffic route lighting. For example, the lighting level at accident sites or in unfavorable weather conditions can be increased by regulating the street lighting as required, which can reduce the risk of an accident.

Furthermore, in one embodiment, the operating device can comprise an electrical converter. This is used to convert the electrical energy provided from the outside into a voltage that is required to operate the LEDs. In particular, the electrical converter can be designed as a step-down converter, which converts an externally provided higher voltage into a lower voltage suitable for operating the LEDs.

According to one embodiment, the luminaire insert also has light-directing elements which are arranged in front of the LEDs in their emission direction. The light directing elements can also in particular be a transparent or opal plastic, e.g. PMMA. In particular, the use of plastic injection molded parts is possible.

Furthermore, the light-directing elements can have a reflective or partially reflective surface coating. The coating can in particular comprise the materials aluminum, silver or gold. In particular, it is possible to apply the material with the aid of a vacuum metallization process. In one embodiment, a coated part of the surface can be smooth or matt. Furthermore, a coated partial area of the surface can be provided with facets. In order to achieve a desired light distribution, the light-directing element can also have further molded or insertable light-refracting or light-scattering elements, such as e.g. a Fresnel lens, prism, diffuser, or a combination of these elements.

In one embodiment, the light-directing element is designed in several segments, each of which has means for mechanically connecting the segments to one another. The means can be formed in one piece from the material of the light guide unit or attached to them as separate elements. The connecting elements can be formed in such a way that individual segments can be connected to one another both in the horizontal and in the vertical direction. By arranging different segments in the vertical direction, i. If the segments are stacked on top of one another, the light distribution in the radial direction relative to the luminaire can in particular be influenced. By connecting different segments in a horizontal direction, the light distribution in ring-shaped areas that run concentrically around the lamp can also be influenced. In order to optimize the light distribution for a desired application, the individual segments can be designed differently. In particular, different segments can have different dimensions in the horizontal and vertical directions.

In one embodiment, the light directing element comprises reflector surfaces to reflect the light emitted by the LEDs. The desired light distribution can be set here through an optimized arrangement or alignment of the reflectors. In particular, parts of the Reflectors direct light from an LED group arranged in a row, for example, in an area close to the luminaire (within a radius of 10 m from the luminaire), while other sub-areas of the reflectors direct the light of the same LED or LED group in an area further away from the luminaire . In particular, two partial areas of the reflectors, which direct light into the near or far area of the lamp, can lie one above the other, for example within a segment of the light directing element.

According to a preferred embodiment, the light-directing element forms several compartments, each of which comprises two opposing or four reflector surfaces arranged approximately in the form of a box. The reflector surfaces which are arranged transversely to the longitudinal axis of the carrier element are preferably inclined with respect to the longitudinal axis of the carrier element. As a result, with a reflector surface pointing downwards, the light radiation of the LED can be deflected into the area close to the luminaire, while the reflector surface pointing upwards deflects the light from the LED into the area remote from the luminaire.

According to one embodiment, the compartments are constructed from the segments of the light guiding element. One segment can each include the upper half and the lower half of two adjacent compartments. It is also provided that a segment of the light-guiding element comprises one or more complete compartments which are each formed from two or four reflector surfaces.

In a further embodiment, parts of the light guiding element can be connected to one another with the aid of a support structure. The use of a separate support structure can in particular increase the mechanical stability of the structure. Furthermore, this makes it easier to use different parts of the light-guiding element, for example for a combination of segments with different dimensions. The support structure itself can be made of a transparent, opal material. In particular, the support structure can be made of plastic. Alternatively or additionally, the support structure can also have metallic elements.

According to a further embodiment, the support structure can be visible from the outside. In particular, in one embodiment, a partial area of the support structure can be designed as a light guide, whereby the appearance of the lamp can be influenced in a targeted manner. In particular, the support structure can also be provided with fluorescent or light-scattering particles, which allow partial areas of the support structure to appear as a luminous framework.

In one embodiment, the light distribution of the lamp is influenced in particular by the arrangement of the individual LEDs on the circuit carrier, the arrangement of the circuit carriers in the lamp, and the arrangement and design of the light-directing elements. For example, an increased assembly density with LEDs in an angular range of the LED module can intensify the illuminance. Such a configuration can be advantageous in order to specifically illuminate parts of the street more intensely in an application for street lighting and, on the other hand, to illuminate parts that are located away from the street less intensely.

The lamp insert according to the invention can be used in the field of interior and exterior lighting. Use in the field of outdoor lighting is particularly advantageous, e.g. in the field of traffic route lighting or for lighting parks or squares. The interchangeability of the luminaire insert means it can be used in different luminaire families. Use is possible e.g. in mushroom lights, mast lights, lanterns or bell lights. The luminaire insert can be designed in such a way that it meets the mechanical requirements of the individual luminaire families. For example, the lamp insert for use in a bell lamp can be designed so that it can be mounted in a hanging position.

According to one embodiment, the LEDs can be arranged on the circuit carriers in such a way that the light distribution is essentially concentrated in two directions. For this purpose, the LEDs are aligned in such a way that their direction of radiation has a horizontal projection which forms an angle of approximately 90 ° to approximately 180 °, in particular approximately 100 ° to approximately 160 °, e.g. includes about 120 °. Such a light distribution is particularly advantageous for use as residential street lighting because the light from the luminaire, which is arranged on the edge of the street, is emitted along the street or the sidewalk next to the street, but not in the direction of the house facade.

According to a further embodiment, the light distribution in a horizontal plane can be approximately isotropic. This can be done in particular by an arrangement of the LEDs and the light-directing elements which is approximately radially symmetrical in a horizontal sectional plane. In particular, the circuit carriers used in one embodiment can have the same dimensions and the same LED distributions and can be arranged in relation to one another in such a way that they form a regular n-gon in a horizontal cross section. Such a light distribution is particularly advantageous for illuminating a square.

According to one embodiment, LEDs with different light colors can be used to equip the circuit carriers. In particular in connection with the use of a control module, LEDs with different light colors can also be specifically controlled in this embodiment. In this way, the light color of the lamp can be adjusted. In particular, when using several circuit carriers in a luminaire insert, the circuit carriers can have different distributions of the LEDs, so that, for example, LEDs of a certain color dominate on one of the circuit carriers used, while another circuit carrier has more LEDs of a different color.

According to one embodiment, the lighting level which is provided by the luminaire can take place by dimming individual LEDs or LED groups. In a further embodiment, the lighting level can be specifically influenced by switching individual LEDs or LED groups on or off.

For the targeted setting of a specific light distribution, in one embodiment the number of LEDs that emit in a specific solid angle range can vary. The total number of LEDs and their maximum power output are decisive for the dimensioning of the control gear. The use of approximately 5 to approximately 200 LEDs, in particular 10 to 100 LEDs, in particular 20 to 50 LEDs, is particularly advantageous here. The distribution of the LEDs on the circuit carrier or the circuit carriers can in particular be inhomogeneous. This results in a light distribution of the lamp, which shows different intensities in different areas of the room.

According to one embodiment, the LEDs can be arranged in rows on the circuit carrier. These rows can e.g. run vertically or horizontally. For example, 1 to 5 LEDs can be arranged next to one another in a horizontal row. Similar dimensions are also possible for vertical rows. An inhomogeneous distribution is also possible to achieve a special light distribution.

According to one embodiment, the individual LEDs on a circuit carrier can be contacted with the aid of conductor tracks. Contacting using separate cabling is also possible.

According to one embodiment, the LEDs are soldered onto the circuit carrier. Attachment using a bonding process is also possible. These processes also ensure efficient heat dissipation from the LEDs into the circuit board. Furthermore, an attachment using an adhesive process is also possible.

In order to enable efficient cooling of the LEDs, it is advantageous in one embodiment if, for the heat flow important components of the LED module, such as the structural element, the carrier element and the cover element, a material with good thermal conductivity, e.g. Have aluminum. Furthermore, the carrier element and / or the structural element can be manufactured in such a way that a cavity is formed in the interior of the LED module through which air can flow. In particular, in one embodiment, a cavity is formed in the interior of the LED module.

Furthermore, in one embodiment, the lamp insert can furthermore have a fan which contributes to cooling. The air flow generated by the fan facilitates thermal convection, through which heat can be released from the components of the luminaire to the air. In one embodiment, the LED module can furthermore have a controllable heat source in the upper region, by means of which convection is additionally stimulated. In particular, it is also possible to use a Venturi nozzle.

In addition, some components, such as e.g. the structural element or the carrier element as well as the cover element have additional, surface-enlarging features. In particular, in some embodiments, the surface-enlarging features can be present as rib-shaped or lens-shaped surface profiles.

• 1 zeigt schematisch verschiedene Komponenten des Leuchteneinsatzes in Explosionsdarstellung.
• 2 zeigt die Anordnung der Lichtlenkeinheit an dem Leuchteneinsatz teilweise in Explosionsansicht.
• 3 zeigt eine vollständige Lichtlenkeinheit einer Ausführungsform, wobei zwei Elemente der Lichtlenkeinheit separat dargestellt sind.
• 4a und b zeigen Elemente einer Lichtlenkeinheit.
• 5a und b zeigen einen Ausschnitt der Lichtlenkeinheit in einem vertikalen und einem horizontalen Schnitt.
• 6a bis g zeigen Anordnungen von LEDs auf jeweils einem Schaltungsträger.
• 7 zeigt eine Pilzleuchte mit dem Leuchteneinsatz.
• 8a und b zeigen eine alternative Ausführungsform eines Entblendungselements in Aufsicht und von der Seite.
• 9a und b zeigen eine weitere alternative Ausführungsform eines Entblendungselements in Aufsicht und von der Seite.
• 10 zeigt einen Querschnitt durch die Lichtlenkeinheit mit den Entblendungselementen nach 9a und b.
• 11 zeigt ein anderes Beispiel des Leuchteneinsatzes teilweise in Explosionsansicht.
• 12 zeigt ein anderes Beispiel des Leuchteneinsatzes teilweise in Explosionsansicht.
• 13 zeigt ein anderes Beispiel des Leuchteneinsatzes teilweise in Explosionsansicht.

Further features and advantages of the present invention are explained using a preferred embodiment in connection with the following drawings, which show the following:

• 1 shows schematically various components of the luminaire insert in an exploded view.
• 2 shows the arrangement of the light control unit on the lamp insert partially in an exploded view.
• 3 shows a complete light guide unit of an embodiment, two elements of the light guide unit being shown separately.
• 4a and b show elements of a light directing unit.
• 5a and b show a detail of the light guide unit in a vertical and a horizontal section.
• 6a to g show arrangements of LEDs on one circuit carrier each.
• 7th shows a mushroom lamp with the lamp insert.
• 8a and b show an alternative embodiment of a masking element in plan view and from the side.
• 9a and b show a further alternative embodiment of a masking element in plan view and from the side.
• 10 shows a cross section through the light guide unit with the glare control elements 9a and b.
• 11 shows another example of the lamp insert partially in an exploded view.
• 12 shows another example of the lamp insert partially in an exploded view.
• 13 shows another example of the lamp insert partially in an exploded view.

In 1 an exploded view of a lamp insert is shown. A carrier element is located in the upper part of the lamp insert 20th , which has an elongated shape and on the peripheral surface around the longitudinal axis surface portions 21st Are defined. The surface sections 21st of the carrier element 20th are each approximately flat and define a regular hexagon in a cross section perpendicular to the longitudinal axis of the carrier element.

In every surface section 21st is also a groove 22nd in the longitudinal direction of the carrier element 20th provided, which is suitable that screws and guide elements at any height along the groove 22nd can intervene. On every surface section 21st of the carrier element 20th is a circuit carrier 30th by means of screws 31 through holes 32 attached (see 2 , which is a circuit carrier 30th at a distance from the carrier element 20th represents) on the circuit board are LEDs 35 arranged.

The carrier element 20th is made of aluminum to ensure good heat conduction. It closes down a structural element 10 on, which in the present example is formed from several angled elements, also made of aluminum. On the carrier element 20th facing away from the structural element 10 are bends 11 provided, with the help of which the lamp insert can be fastened in a housing of a lamp in an upright position. The structural element 10 is also on the outside with covers 60 disguised. These covers 60 are also made of aluminum and support the cooling of the luminaire insert with ambient air. Within the structural element 10 is an operating device 50 arranged. The control gear 50 is by means of an electrical connection terminal 51 on the structural element 10 can be connected to the existing electrical supply lines in the luminaire. The control gear 50 has a voltage converter to convert the voltage of the mains supply to the voltages required to operate the LEDs. The control gear 50 supplies the circuit carriers via cables (not shown in the figures) 30th with the necessary supply voltage for the LEDs 35 that are on the circuit board 30th are arranged.

A control module is also optional 55 with the control gear 50 connected. The control module 55 allows the LEDs 35 on the circuit carrier 30th to switch and dim based on specified control parameters, such as the time of day or based on measuring sensors on the luminaire insert. In particular, individual groups of LEDs 35 on the circuit carriers 30th switched or dimmed differently.

In 7th the light insert is shown in a street light, a so-called mushroom light. Through a transparent housing cover 82 the light insert can be seen in an upright position. In the area of the structural element 10 are only the covers on the outside 60 to recognize.

On the top of the carrier element 20th is also a threaded pin 27 intended. This is used, as in 7th shown, a housing roof 80 at the upper end of the support element 20th to fix. The structural element 10 is with the angled approaches 11 in a lamp housing base 83 on the end of a lamp post 81 attached (in 7th from a pedestal 83 covered). The structural element 10 and the support element 20th are designed to be so stable that they remove the luminaire housing from the base 83 the cover 82 and the housing roof 80 can also support.

Around the perimeter of the support element 20th or the circuit carrier 30th is also a light guide element 40 arranged, which in the example shown consists of several stacked segments 41 is formed. The 4a and 4b each show a single segment 41 as a single part. Two segments 41 connected to one another result in an approximately ring-shaped, more precisely a hexagonal structure, which around the carrier element 20th or the circuit carriers 30th can be arranged. On the inside of the segments 41 of the light guide element 40 are locking lugs 45 and protrusions 46 provided with which the segments 41 on the circuit boards 30th can be attached in corresponding recesses.

Like in the 3 can be seen several segments 41 stacked on top of each other up to a height which is approximately the longitudinal extent of the carrier element 20th or the circuit carrier 30th corresponds. As in the 1 and 2 shown, the structure of the light guide element 40 from the individual parts around the circumference of the carrier element 20th or the circuit carrier 30th be attached.

Referring to 2 you can see that each has a row of LEDs 35 extending transversely to the longitudinal direction of the carrier element 20th extend a segment 41 of the light directing element 40 assigned.

The lighting function of the individual segments 41 of the light directing element 40 is in the 5a and 5b shown.

The segments 41 have differently inclined reflection surfaces in the horizontal direction 401 and 402 on. The reflector surface 402 ensures due to their arrangement above the LED 35 that light according to the beam path 1001 is reflected downwards. This radiation contributes to the lighting in the area close to the luminaire (e.g. around 10 m around the luminaire). The radiation 1002 the LED 35 without reflection on the light directing element 40 leaves as well as the radiation 1003 and 1004 which on the upward-facing reflective surfaces 401 are reflected, on the other hand, leave the luminaire in a horizontal direction. The light radiation thus contributes to the illumination of the areas further away from the luminaire.

The direction of light within a horizontal plane is in 5b shown. Lateral reflector surfaces 404 ensure that the light distribution, which by each one LED 35 is generated, is limited in the lateral direction. As a result, the reflector surfaces wear 404 this contributes to the fact that the light distribution of the luminaire is more strongly focused on the radial of the longitudinal axis in the middle of the two reflector surfaces of the carrier element.

In addition to the aforementioned reflector surfaces 401 , 402 and 404 of the light directing element 40 this still has optical anti-glare elements 420 in the form of light-diffusing transparent plates 420 on, each between two segments 41 roughly parallel and at a short distance from the circuit carriers 30th extend. The glare control element 420 is made using positioning holes 403 between every two segments 41 held.

The 8a and b and 9a and b show two alternative embodiments of the masking element 420 ' or. 420 " . As in the 8a and 8b shown, has the anti-glare element in several rows 421 ' Lenticular elevations arranged on one side of the anti-glare element 422 ' with a radius of curvature R. This optical structure is selected in such a way that the light from the LEDs is deflected downwards in a focused manner. The thickest point of the middle row of lenses lies below a main axis of LEDs, which causes the downward deflection. The shape of the lenticular bumps 422 ' is selected so that the light is focused more in the vertical direction than in the horizontal direction. In the embodiment shown, the lens-shaped elevations form wedge-shaped cut partial cylinders with a radius of curvature R. Uniform illumination of the usable area is thus achieved. The height H of the rows and the width A of the lenticular elevations 422 ' are preferably chosen so that a shift of the LEDs relative to the glare control element 420 ' remains with a large number of LEDs without optical effect. As a result, the light distribution generated remains even in the event of inaccuracies in the positioning of the glare control element 420 ' receive. The lenticular elevations are arranged adjacent to one another in the rows. In other embodiments, spaces can also be provided between them.

According to the alternative embodiment according to 9a and 9b are only in the upper area of the surface structure of the anti-glare element 420 " Rows 421 " with lenticular elevations 422 " , in the example shown three rows 421 " , intended. In the lower area of the anti-glare element 420 " the anti-glare element is matt or clear.

The 10 shows the anti-glare elements in cross section 420 " when installed. The positioning pin 423 " reaches into the positioning holes (in the 10 not visible) of the segments of the light guide element. This becomes the anti-glare element 420 " in a defined position opposite the LEDs 35 held. The anti-glare elements 420 and 420 ' are in the same way as in 10 for the anti-glare element 420 " shown positioned.

Alternatively, it can take the place of the anti-glare element 420 a refractive device such as a lens may also be provided. In this embodiment, two opposing reflector surfaces are preferred 401 and 402 and the two lateral reflector surfaces in between 404 provided in one piece in a segment of the light guide element.

The stacked segments 41 of the light directing element 40 therefore form through their reflective surfaces 401 , 402 and 404 each with a compartment containing an LED or a series of LEDs is assigned to the circuit carrier. The light can be directed by choosing the angle of the reflector surfaces 401 , 402 and 404 precisely adapted to the requirements because the LED 35 emits light as an almost point-like emitter with a defined scattering angle. In contrast to a light source emitting areal, such as a fluorescent tube, which emits light over the entire circumference, the light-directing element can therefore 40 according to the present embodiment can be matched much more precisely to the arrangement of the light sources.

The arrangement of LEDs on the circuit boards 30th is in for various embodiments in the 6a to 6g shown. It is to be understood that different circuit carriers are on different sides of the carrier element 20th a lamp insert according to an embodiment of the invention can be provided.

The basic structure of the arrangement of the LEDs on a circuit carrier 30th is in 6a shown. The circuit carrier 30th has an electrical connection 301 in the form of a plug that connects to the operating device via an electrical cable (not shown) 50 or the control module 55 is connected. On the circuit board 30th there are also positions arranged in several rows and columns 303 , which with electrical conductor tracks (not shown) on the circuit board 30th are connected to solder LEDs at these positions. There are also bridge elements 302 each intended for LED position. By plugging in or unplugging 0 Ω bridges, the electrical supply to a designated position for the LEDs can be activated or deactivated.

The 6b to 6g indicate, for example, as intended positions 303 can be occupied with LEDs. All LED positions can be occupied by active LEDs ( 6d ). Such an arrangement is preferred for one side of the carrier element 20th which points in a direction in which a particularly large amount of light should be emitted. For circuit boards that point in directions in which less light is to be emitted, some columns or all columns except one can remain without function ( 6b , 6c and 6f) . Furthermore, the rows within a circuit carrier 30th be filled differently (see 6e and 6g) . The latter is particularly preferred when a special light effect is to be generated in relation to the appearance of the lamp in the longitudinal direction of the carrier element. For example, it can be desired that the lamp should appear lighter in the lower area and darker in the upper area, which can be achieved by the corresponding uneven arrangement of the LEDs. An asymmetrical distribution within the rows can also be desired. Corresponding examples are in the 6f and 6g specified.

As before with reference to the description of the light directing element 40 is one segment at a time 41 or a compartment, which is made up of the top and the bottom of two successive segments 41 results, assigned to a row of LEDs. It is also possible that the segments 41 of the light directing element are not identical to one another. A different light distribution of the luminaire insert can then be generated by arranging or wiring LEDs on the circuit carrier.

The assembly of the circuit carriers 30th with LEDs in different positions of the regular matrix can actually be done physically by occupying only certain positions. However, it is also possible for LEDs to be arranged at each position of the matrix, but only to be switched in different groups, the switching preferably being carried out by the control module 55 he follows. Different lighting effects can be created at different times of the day. Furthermore, the lighting effects can be produced not only by switching LEDs on and off, but also by continuously dimming LEDs or groups of LEDs at selected positions within the circuit board 30th .

Further examples of light inserts are in the 11 , 12 and 13 shown. The light-directing elements are in these luminaire inserts 40 ' , 40 '' or. 40 ''' in contrast to the previously described light guide elements 40 made entirely of refractive material. The surface structure of the light directing elements is designed in such a way that they act like a lens and achieve a light control comparable to that of the previously described embodiment of the light directing elements 40 . The light-directing elements made of light-refracting material, like the embodiments with reflective surfaces, comprise a plurality of segments 41 ' , 41 " or. 41 '" which are each assigned to a group or row of LEDs at a height on the carrier element. According to the embodiments according to 11 and 12 the light-directing elements are formed from approximately part-cylindrical elements that are attached to the carrier element from the outside 20th can be put on. According to the embodiment according to 13 are the segments 41 ''' of the light directing element 40 ''' approximately cylindrical and are pushed axially onto the carrier element. The embodiment according to 13 also has the peculiarity that some of the segments 41 ''' (in the 13 the lower three segments) are asymmetrical. This embodiment is preferred for lights that are to produce different light distributions on different sides. For example, it can be provided that the light is directed more downward on one side of the lamp, for example in order to illuminate an area under the lamp near the mast, while a broader light distribution is generated on the other side.

Numerous modifications of the embodiments described above can be made within the scope of the invention as defined in the claims. For example, the invention is not based on flat circuit carriers 30th , as shown in the figures, limited. Cylindrical or semi-cylindrical or part-cylindrical circuit carriers can also be used. Flexible circuit carriers can also be applied to correspondingly cylindrical or partially cylindrical surfaces of the carrier element. It should also be taken into account that instead of separate circuit carriers 30th the circuit carrier, ie the conductor tracks with appropriate insulation, also directly on the surfaces of the carrier element 20th can be formed.

List of reference symbols

10

Structural element

11

Angle approach

20th

Support element

21st

Surface section

22nd

Groove

27

Threaded stud

30th

Circuit carrier

31

screw

32

hole

35

LED

40, 40 ', 40' ', 40' ''

Light control elements

41, 41 ', 41' ', 41' ''

Segment of the light directing element

50

Control gear

51

Power clamp

55

Control module

60

Cover element

80

Housing roof

81

Lamp mast

82

Transparent cover

83

Luminaire housing base

301

Electrical connection

302

Electric bridge

303

LED position

401

Reflector surface

402

Reflector surface

403

Position hole

404

Reflector surface

405

Locking lug

420, 420 ', 420 "

Anti-glare element

421 ', 421 "

Rows

422 ', 422 "

lenticular elevations

423 ', 423 "

Ledges

1001

Beam of light

1002

Beam of light

1003

Beam of light

1004

Beam of light

Claims (26)

Luminaire insert with a light directing element, the luminaire insert comprising the following: an elongated carrier element (20) which is set up along its circumference around the longitudinal axis to accommodate circuit carriers (30) for LEDs (35) or which has surface sections along its circumference around the longitudinal axis which are at least partially set up as circuit carriers for LEDs, and a plurality of LEDs (35) which are arranged on at least one of the circuit carriers (30), and wherein the light-directing element, which extends around at least part of the circumference of the carrier element (20) in front of the circuit carrier (30), has a plurality of segments (41, 41 ', 41 ", 41"'), wherein each segment (41 , 41 ', 41' ', 41' '') has at least one reflective surface (401, 402) which is assigned to an LED or a row of LEDs that extends transversely to the longitudinal extension of the LEDs, wherein a light-scattering or light-refracting element (420, 420 ', 420' ') is arranged between two opposing reflector surfaces (401, 402) of the light-guiding element. Luminaire insert after Claim 1 , wherein the circuit carrier or carriers (30) define a regular n-gon, preferably with five or more corners, in a cross section perpendicular to the longitudinal axis of the carrier element, or the circuit carrier or carriers are a cylinder or Define cylinder sections along the longitudinal axis of the carrier element. Luminaire insert according to one of the preceding claims, wherein the carrier element (20) defines the shape of a regular n-gon, preferably with five or more corners, or the shape of a cylinder in a cross section perpendicular to the longitudinal axis. Luminaire insert according to one of the preceding claims, wherein electrical components are arranged on one or more of the circuit carriers (30), in particular sensors for temperature measurement, sensors for luminous intensity measurement and / or electrical components for switching the power supply to the LEDs. Luminaire insert according to one of the preceding claims, wherein the LEDs are arranged on the at least one circuit carrier (30) in one or more columns which extend in the longitudinal direction of the carrier element (20). Luminaire insert according to one of the preceding claims, wherein at least some of the LEDs are arranged in rows transversely to the longitudinal axis of the carrier element on the circuit carrier (30). Light insert after Claim 6 with reference to Claim 5 wherein at least some of the LEDs on a circuit carrier are unevenly distributed over the rows and columns of the circuit carrier (30). Luminous insert according to one of the preceding claims, wherein individual LEDs or groups of LEDs are electrically connected separately from one another and can be controlled individually. Luminaire insert according to one of the preceding claims, wherein the carrier element (20) has an outer profile in a cross section perpendicular to its longitudinal axis which corresponds in cross section to the arrangement of the circuit carriers (30), in particular the carrier element and the circuit carriers each have the shape of a cross section n-corner. Luminaire insert according to one of the preceding claims, wherein the carrier element (20) is hollow on the inside. Luminaire insert according to one of the preceding claims, wherein the carrier element (20) are made of aluminum or an aluminum alloy. Luminaire insert according to one of the preceding claims, which comprises a control module (55) which individually regulates individual LEDs or groups of LEDs. Luminaire insert according to one of the preceding claims, wherein the light-directing element (40, 40 ', 40 ", 40"') extends around the entire circumference of the carrier element (20). Luminaire insert according to one of the preceding claims, wherein the light-directing element (40, 40 ', 40 ", 40"') has a plurality of repeating segments (41, 41 ', 41 ", 41"'), in particular a stacking of Segments (41) in the direction of the longitudinal axis of the carrier element (20). Luminaire insert according to one of the preceding claims, wherein the light-directing element defines compartments which each have at least two reflector surfaces (401, 402) which are inclined with respect to the longitudinal axis of the carrier element. Luminaire insert according to one of the preceding claims, wherein the segments (41) comprise at least two reflector surfaces (401, 402). Luminaire insert after Claim 17 , the segments (41) each having the height of one or more compartments in the longitudinal direction of the carrier element. Luminaire insert according to one of the preceding claims, wherein the segments (41, 41 ', 41 ", 41"') can be connected to one another by plug connections. Luminaire insert according to one of the preceding claims, wherein at least some of the segments (41, 41 ', 41 ", 41" ") of the light-guiding element (40, 40', 40", 40 "") have an identical shape. Luminaire insert according to one of the preceding claims, wherein a segment encloses 1 / nth of the circumference of the carrier element, wherein n is a natural number, in particular 2, 3, 4, 5 or 6. Luminaire insert according to one of the preceding claims, parts of the light guiding element being connected to one another by means of a support structure which is formed in particular from a transparent, opal material or material provided with light scattering elements. Luminaire insert according to one of the preceding claims, wherein the LEDs (35) are distributed or controllable on the circuit carriers (30) in such a way that the light emission of the luminaire insert takes place in a plane perpendicular to the longitudinal axis of the support element essentially in two directions, in particular symmetrically . Luminaire insert after Claim 22 , wherein the two directions in the plane enclose an angle between approximately 90 ° to approximately 180 °, in particular approximately 100 ° to approximately 160 °. Luminaire insert according to one of the preceding claims, wherein the LEDs are distributed or controllable on the circuit carriers (30) in such a way that the light distribution generated by the luminaire insert is approximately isotropic in a plane perpendicular to the longitudinal axis of the lamp carrier (20). Luminaire insert according to one of the preceding claims, wherein the circuit carriers are filled with LEDs with different colors. Luminaire insert according to one of the preceding claims, wherein individual LEDs or groups of LEDs can be individually switched on or off and / or dimmed.

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