EP2275732B1 - LED light element - Google Patents

Description

The present invention relates to a LED light insert for retrofitting in lights, especially for outdoor lights.

The progressive development in the field of LED technology enables the increasing use of LEDs as light sources in various areas of lighting technology. In particular, high brightness LEDs also permit use in the field of exterior lighting, such as outdoor lighting. the traffic route lighting. These areas have so far been dominated by high pressure sodium vapor lamps and high pressure mercury vapor lamps. However, these are often partially harmful to the environment and have only a low efficiency in the conversion of electrical energy into light. Furthermore, these lamps often require expensive additional optics or reflectors to produce a desired light distribution. In addition, such lamps are usually not dimmable, and the electrical ballasts used have a low efficiency.

It is therefore desirable to provide a lighting unit that allows efficient use of electrical energy and largely dispenses with the use of environmentally harmful materials. Furthermore, it is advantageous if the lamps used are dimmable and the light generated is easily steered by simple means in order to achieve a desired light distribution. Although alternative LED-based lighting devices are already known, it is often not practical from an economic point of view to use existing lighting systems such as lighting systems. Street lights, completely dismantle to replace them with new lighting equipment.

US 2009/0097241 A1 discloses an LED lamp with a heat sink structure. On a cylindrical support member LED boards are arranged along the circumference column-shaped. The structure, which is intended for heat dissipation, is connected on one side with a heat sink and connected on the other side with a carrier element.

WO 2008/070519 A2 discloses a system and method for thermal control of LED light sources. On a columnar, triangular in cross-section thermal construction, inside which runs a heat pipe, is mounted on two side LED modules and on the third side of an LED driver.

US 6,621,222 B1 discloses an energy saving lamp. An LED assembly is mounted on a threaded socket by means of a clamp. Furthermore, an electrical circuit for transformer to the voltage necessary for the supply of LEDs is integrated.

US 5,921,660 discloses an electric lamp with a lamp body consisting of two shells, along the connecting seam LEDs are arranged on the circumference of the lamp. The lamp has a rotary thread connection, one side of which is firmly connected to the lamp head and the other side is rotatably mounted.

Object of the present invention is therefore with the least possible effort existing luminaires, as they are found in particular in the field of outdoor lighting, with a view to the more efficient use of energy to improve.

The invention achieves the object by a luminaire insert according to claim 1.

On the at least one circuit carrier LEDs, including OLEDs are to be understood, arranged. 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 current regulation circuit. Furthermore, conductor tracks may be arranged on the circuit carriers, which contact the LEDs and / or electrical components.

In one embodiment, the circuit carrier may 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 radiate in different spatial directions. The arrangement of the LEDs affects the overall light distribution of the lamp.

In a further embodiment, circuit carriers may be used which have a substantially planar surface. In this case, a plurality of circuit carriers may be composed such that respective adjacent circuit carriers are aligned at one edge. When n circuit carriers are used, an n-corner may result, in particular in the cross-section of the arrangement, the LEDs being arranged on the outside of the n-corner. Such a planar design of the circuit carriers offers the advantage that the LEDs can be mounted by means of methods known in the provision of planar LED modules. In one embodiment, the array of circuit carriers forms a uniform n-corner, e.g. a uniform hexagon. At a polygon of at least five corners, a relatively uniform light distribution can be achieved by 360 ° of the luminaire insert. The application of printed conductors and the assembly of further electrical components, e.g. Sensors, is facilitated by the use of circuit boards with a flat surface. In order to provide a light distribution, as 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, in particular, the use of five or six circuit carriers offers. In particular, a higher number may allow a finer angular distribution of the radiated light, but on the other hand requires a higher assembly outlay.

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

Alternatively, surface portions of the carrier element itself may be formed as a circuit carrier. According to one embodiment, metallic interconnects are on the surface the support member or an electrical insulating layer of the surface of the support member attached.

The circuit carrier may have a matrix of columns and rows in which the LEDs are positioned. In particular, the matrix may 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 for a given matrix, it is possible in one embodiment to activate or deactivate the LED at a position of the matrix with an electrical bridge. The circuit carrier in this embodiment may have a uniform arrangement of columns and rows of possible LED terminal positions, while the LEDs may be evenly or non-uniformly distributed thereon. In one embodiment, also possible LED connection positions which are not occupied by LEDs can be short-circuited with an electrical bridge, because a series connection of the LEDs or the LED positions is provided.

In one embodiment, the LEDs can be arranged so that they are individually contactable from the outside and can be controlled individually. Further, in some embodiments, the circuit carrier may include external terminals that are particularly for electrical energy supply. Preferably, these can be designed as a plug connection. In particular, when using a plurality of circuit carriers in a luminaire insert, an arrangement of the plug is advantageous in which a parallel or series connection of the individual circuit carrier is possible, in which the means for connection do not cross. Furthermore, in one embodiment, the circuit carrier may be provided with a protective coating which serves to protect against moisture. The coating can be designed as a transparent coating or coating.

In one embodiment, the carrier element in cross-section perpendicular to its longitudinal axis have an outer profile which corresponds to the cross section of the arrangement of the circuit carrier or at least similar. In particular, the carrier element may have a n- angular cross-section. In one embodiment, the support member may be a tubular, hollow member, on the outer surface of which the circuit carriers are arranged. In this embodiment, the carrier element may in particular have channels in order to fasten the circuit carriers, for example by means of screws. In another Embodiment, the carrier element can be made massive. Since the heat generated during operation of the LEDs flows essentially from the LEDs via the circuit carrier to the carrier element, and from this a heat flow to the structural element takes place, a use of a material for the carrier element is advantageous, which has a good thermal conductivity. In particular, the support element may comprise aluminum. In further embodiments, the support member may comprise iron or copper.

According to one embodiment, at least one circuit carrier can be fastened on the carrier element by means of a screw or clamping device or by means of an adhesive method. To create a good thermal contact, a forming cavity between the circuit carrier and the carrier element may be filled with a thermally conductive material (e.g., a thermal grease).

The invention further provides a structural element. This serves for the mechanical stability and the attachment of other components of the luminaire insert, in particular the carrier element, in the luminaire housing. Preference is given here to the use of a metallic material. In one embodiment, the structural element may be made of aluminum. Due to the high thermal conductivity of aluminum, this allows an efficient dissipation of the heat generated in the LEDs. Furthermore, the structural element can be provided with outer surfaces, via which the heat 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 may also be a casting or have a construction of sheets.

For easy retrofitting of the lamp insert, the structural element is further provided with a fastening means to secure the lamp insert to the lamp. In particular, the structural element may have a thread. In other embodiments, other fastening means, such as in particular means may be provided for a latching connection.

In some embodiments, the carrier element can also comprise fastening means for a component of the luminaire to be renovated, for example for a lampshade or luminous lid. In particular, a fastener, such as a threaded pin, may be provided on the support member for use in mushroom lights to secure a roof member of the lamp housing.

Furthermore, the luminaire insert can have one or more cover elements. These serve in particular to cover portions of the luminaire insert, which 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 benefit, the cover can also contribute to the cooling of the lamp. In particular, openings may be provided for ventilation. Further, the cover elements may have surface areas which contribute to the dissipation of waste heat to the surrounding air. In a further embodiment, the cover element may be formed in one piece on the structural element. Furthermore, the cover may have an opening or recess through which an electrical connection of the lamp takes place. The opening or recess may also have a lid which is fixed to the cover.

The at least one operating device of the luminaire insert is used for the electrical supply of the LEDs. In addition to power electronic components, the operating device may also contain logic. In particular, the operating device may also include a control module (e.g., a Siteco Light Control (SLC) device). This results in particular in the advantage of being able to regulate all LEDs individually or individual LEDs individually and to be able to program a lighting scenario as required. In this way, e.g. Overlighting can be avoided and energy consumption 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 an appropriate regulation of the street lighting, whereby an accident risk can be reduced.

Further, in one embodiment, the operating device may include an electrical converter. This serves to convert the electrical energy provided from the outside into a voltage which is required for the operation of the LEDs. In particular, the electric Converter can be designed as a buck converter, which converts a higher voltage provided from the outside into a suitable voltage for operating the LEDs lower voltage.

According to the invention, the luminaire insert furthermore comprises light-deflecting elements which are arranged in front of the LEDs in their emission direction. In particular, the light directing elements may comprise a transparent or opal plastic, e.g. PMMA. In particular, the use of plastic injection-molded parts is possible.

Furthermore, the light-guiding elements may have a reflective or partially reflecting surface coating. The coating may in particular comprise the materials aluminum, silver or gold. In this case, it is possible in particular to apply the material by means of a vacuum metallization process. In one embodiment, a coated portion of the surface may be smooth or frosted. Furthermore, a coated partial area of the surface can be provided with facets. In addition, to achieve a desired light distribution, the light-directing element may comprise further molded or insertable refractive or light-diffusing elements, e.g. a Fresnel lens, a prism, a diffuser or a combination of these elements.

In one embodiment, the light-guiding element is embodied in a plurality of segments which each have means for the mechanical connection of the segments to one another. The means may be integrally formed from the material of the light guide unit or attached as separate elements to this. The connecting elements can be formed so that individual segments can be connected to each other both in the horizontal and in the vertical direction. By arranging different segments in the vertical direction, ie stacking of the segments one above the other, in particular the light distribution in the radial direction relative to the luminaire can be influenced. By connecting different segments in the horizontal direction, the light distribution in annular areas, which extend concentrically around the luminaire, can furthermore be influenced. In order to optimize the light distribution for a desired application, the individual segments can be designed differently. In particular, different segments may have different dimensions in the horizontal and vertical directions.

In one embodiment, the light directing elements may be reflectors to reflect the light emitted by the LEDs. By optimizing the arrangement or alignment of the reflectors, the desired light distribution can be adjusted. In particular, portions of the reflectors may receive light from an LED group, e.g. arranged in a row, in a light-near area (within a radius of 10 m to the light), while other portions of the reflectors direct the light of the same LED or LED group in a more luminous area. In particular, two subareas of the reflectors, which direct light into the near or far region of the luminaire, can lie one above the other, e.g. within a segment of the light-directing element.

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

According to a further embodiment, the support structure may be visible from the outside. In particular, in one embodiment, a portion of the support structure may be formed as a light guide, whereby the appearance of the lamp can be selectively influenced. In particular, the support structure may further be provided with fluorescent or light-scattering particles, which make portions of the support structure appear as a luminous framework.

In one embodiment, the light distribution of the luminaire is influenced, in particular, by the arrangement of the individual LEDs on the circuit carrier, the arrangement of the circuit carriers in the luminaire, and the arrangement and design of the light-deflecting elements. For example, an illumination intensity can be intensified by an increased population density with LEDs in an angular range of the LED module. Such an embodiment may be advantageous for use in an application for street lighting subregions of the road To illuminate more targeted and stronger, and on the other hand, parts of the area, which are located off the road, less illuminate.

The luminaire insert according to the invention can be used in the field of indoor and outdoor lighting. Particularly advantageous is the use in the field of outdoor lighting, e.g. in the area of traffic route lighting or to illuminate parks or squares. Due to the interchangeability of the luminaire insert this can be used in different luminaire families. It is possible to use e.g. in mushroom lights, pole lights, lanterns or bell lights. The luminaire insert can be designed so that it meets the mechanical requirements of the individual luminaire families. For example, the luminaire insert for use in a bell light can be designed so that it can be mounted in a hanging position.

According to an embodiment, the LEDs may be arranged on the circuit carriers so that the light distribution is concentrated substantially in two directions. For this purpose, the LEDs are aligned so that their emission direction has a horizontal projection, which is an angle of about 90 ° to about 180 °, in particular about 100 ° to about 160 °, e.g. includes about 120 °. Such a light distribution is particularly advantageous for use as a residential street lighting, because the light of the lamp, which is located at the edge of the road, is discharged along the street or sidewalk next to the road, but not towards the house facade.

According to another embodiment, the light distribution in a horizontal plane may be approximately isotropic. This can be done in particular by an arrangement of the LEDs and the light-guiding elements, which is approximately radially symmetrical in a horizontal sectional plane. In particular, the circuit carriers used in one embodiment may have the same dimensions and the same LED distributions, and be arranged to each other in a manner such that they form a regular n- corner in a horizontal cross-section. Such a light distribution is advantageous, in particular for a court lighting.

According to one embodiment, LEDs with different light color can be used for equipping the circuit carriers. In particular in connection with the use a control module can be selectively controlled in this embodiment, LEDs with different light color. In this way, the light color of the lamp can be adjusted. In particular, when using a plurality of circuit carriers in a luminaire insert, the circuit carriers may have different distributions of the LEDs, so that, for example, one of the circuit carriers used is dominated by LEDs of a certain color, while another circuit carrier has more LEDs of a different color.

According to one embodiment, the level of illumination provided by the luminaire may be achieved by dimming individual LEDs or LED groups. In a further embodiment, the lighting level can be influenced in a targeted manner via an activation or deactivation of individual LEDs or LED groups.

For specific adjustment of a specific light distribution, in one embodiment the number of LEDs emitting in a certain solid angle range may vary. Here, the total number of LEDs and their maximum power output is decisive for the dimensioning of the operating device. In this case, in particular, the use of about 5 to about 200 LEDs, in particular 10 to 100 LEDs, in particular 20 to 50 LEDs, is advantageous. The distribution of the LEDs on the circuit carrier or the circuit carriers can be particularly inhomogeneous. This results in a light distribution of the luminaire, which shows different intensity in different spatial areas.

According to one embodiment, the LEDs may be arranged in rows on the circuit carrier. These rows may e.g. vertically or horizontally. In a horizontal row, for example, 1 to 5 LEDs can be arranged side by side. A similar dimensioning is also possible for vertical rows. To achieve a special light distribution and an inhomogeneous distribution is possible.

The individual LEDs on a circuit carrier can be contacted by means of conductor tracks according to an embodiment. A contacting by means of a separate wiring is possible.

According to one embodiment, the LEDs are soldered to the circuit carrier. Also possible is a fastening by means of a bonding method. These methods also ensure efficient heat dissipation from the LEDs into the circuit carrier. Furthermore, a fastening by means of an adhesive method is possible.

To set an optimal light distribution, an embodiment of the invention can provide that an LED or a horizontal or vertical row of LEDs is assigned a light-guiding element or a sector of a light-guiding element.

In order to enable efficient cooling of the LEDs, it is advantageous in one embodiment if components of the LED module which are important for the heat flow, such as the structural element, the carrier element and the cover element, have a thermally highly conductive material, such as e.g. Have aluminum. Furthermore, the carrier element and / or the structural element can be made so that inside the LED module, a cavity is formed, 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 may further comprise a fan, which contributes to the cooling. The airflow generated by the fan facilitates thermal convection by which heat can be released from the components of the luminaire to the air. In one embodiment, the LED module may further comprise a controllable heat source in the upper region, by means of which convection is additionally stimulated. In particular, the use of a venturi nozzle is also possible.

In addition, in some embodiments of the luminaire insert, some components, such as the structural element or the carrier element, as well as the cover may have additional, surface-enlarging features. In particular, in some embodiments, the surface enlarging features may be present as ridge-shaped or lenticular surface profiles.

Figur 1

zeigt schematisch verschiedene Komponenten des Leuchteneinsatzes in Explosionsdarstellung.

Figur 2

zeigt die Anordnung der Lichtlenkeinheit an dem Leuchteneinsatz teilweise in Explosionsansicht.

Figur 3

zeigt eine Lichtlenkeinheit ohne Linsenelemente, wobei zwei Elemente der Lichtlenkeinheit separat dargestellt sind.

Figuren 4a und b

zeigen Elemente einer Lichtlenkeinheit.

Figuren 5a und b

zeigen einen Ausschnitt der Lichtlenkeinheit (in Figur 5b ohne Linsenelemente) in einem vertikalen und einem horizontalen Schnitt.

Figuren 6a bis g

zeigen Anordnungen von LEDs auf jeweils einem Schaltungsträger.

Figur 7

zeigt eine Pilzleuchte mit dem Leuchteneinsatz.

Figuren 8a und b

zeigen eine alternative Ausführungsform eines Entblendungselements in Aufsicht und von der Seite.

Figuren 9a und b

zeigen eine weitere alternative Ausführungsform eines Entblendungselements in Aufsicht und von der Seite.

Figur 10

zeigt einen Querschnitt durch die Lichtlenkeinheit mit den Entblendungselementen nach Figuren 9a und b.

Figur 11

zeigt eine alternative Ausführungsform des Leuchteneinsatzes teilweise in Explosionsansicht.

Figur 12

zeigt eine weitere alternative Ausführungsform des Leuchteneinsatzes teilweise in Explosionsansicht.

Figur 13

zeigt eine weitere Ausführungsform des Leuchteneinsatzes teilweise in Explosionsansicht.

Further features and advantages of the present invention will be explained on the basis of a preferred embodiment in conjunction with the following drawings, which show the following:

FIG. 1

schematically shows various components of the lamp insert in an exploded view.

FIG. 2

shows the arrangement of the light guide unit on the lamp insert partially in exploded view.

FIG. 3

shows a light guide unit without lens elements, wherein two elements of the light guide unit are shown separately.

FIGS. 4a and b

show elements of a Lichtlenkeinheit.

FIGS. 5a and b

show a section of the light guide unit (in FIG. 5b without lens elements) in a vertical and a horizontal section.

FIGS. 6a to g

show arrangements of LEDs on each one circuit carrier.

FIG. 7

shows a mushroom lamp with the light insert.

FIGS. 8a and b

show an alternative embodiment of a glare element in plan view and from the side.

FIGS. 9a and b

show a further alternative embodiment of a glare element in plan view and from the side.

FIG. 10

shows a cross section through the Lichtlenkeinheit with the Entblendungselementen after FIGS. 9a and b.

FIG. 11

shows an alternative embodiment of the lamp insert partially in exploded view.

FIG. 12

shows a further alternative embodiment of the lamp insert partially in exploded view.

FIG. 13

shows a further embodiment of the lamp insert partially in exploded view.

In FIG. 1 is an exploded view of a light insert shown. In the upper portion of the lamp insert is a support member 20 which has an elongated shape and surface portions 21 defined on the peripheral surface about the longitudinal axis. The surface portions 21 of the support member 20 are each formed approximately flat and define in a cross section perpendicular to the longitudinal axis of the support member a regular hexagon.

In each surface portion 21, a groove 22 is further provided in the longitudinal direction of the support member 20, which is adapted to the fact that screws and guide elements can engage at any height along the groove 22. On each surface portion 21 of the support member 20, a circuit carrier 30 is mounted by means of screws 31 through holes 32 (see FIG. 2 which represents a circuit carrier 30 at a distance from the carrier element 20) on the circuit carrier LEDs 35 are arranged.

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

Optionally, a control module 55 is connected to the operating device 50. The control module 55 allows the LEDs 35 to be mounted on the circuit carrier 30 in accordance with predetermined control parameters, such as those shown in FIG. the time of day or due to measuring sensors on the lamp insert to switch and dimming. In particular, individual groups of LEDs 35 on the circuit carriers 30 can be switched or dimmed differently.

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

On the upper side of the support member 20, a threaded pin 27 is further provided. This serves as in FIG. 7 shown to attach a housing roof 80 at the upper end of the support member 20. The structural element 10 is secured with the angle lugs 11 in a lamp housing base 83 on the end of a lamp post 81 (in FIG. 7 obscured by a pedestal 83). The structural member 10 and the support member 20 are stably constructed so that they can also support the lamp housing from the base 83 of the cover 82 and the housing roof 80.

Arranged around the circumference of the carrier element 20 or the circuit carrier 30 is also a light-guiding element 40 which, in the example shown, consists of several stacked ones Segments 41 is formed. The FIGS. 4a and 4b each show a single segment 41 as a single part. Two segments 41 connected to each other result in an approximately annular, more precisely a hexagonal structure, which can be arranged around the carrier element 20 or the circuit carrier 30. On the inside of the segments 41 of the light guide 40 locking lugs 45 and projections 46 are provided, with which the segments 41 can be attached to the circuit carriers 30 in corresponding recesses.

Like in the FIG. 3 can be seen, several segments 41 are stacked one above the other up to a height which corresponds approximately to the longitudinal extension of the support member 20 and the circuit substrate 30. As in the FIGS. 1 and 2 1, the structure of the light-directing element 40 can be attached from the individual parts around the circumference of the carrier element 20 or the circuit carrier 30.

Referring to FIG. 2 It can be seen that in each case a row of LEDs 35, which extend transversely to the longitudinal direction of the carrier element 20, is associated with a sector 41 of the light-guiding element 40.

The photometric function of the individual segments 41 of the light-guiding element 40 is in the FIGS. 5a and 5b shown.

The segments 41 have superimposed reflection surfaces 401 and 402 in the horizontal direction. Due to its arrangement above the LED 35, the reflector surface 402 ensures that light is reflected downwards in accordance with the beam path 1001. This radiation contributes to the lighting in the area close to the light (for example around 10 meters around the luminaire). The radiation 1002, which leaves the LED 35 without reflection on the light-guiding element 40, and the radiation 1003 and 1004, which are reflected at the upwardly facing reflection surfaces 401, on the other hand, leave the light around a horizontal direction. The light radiation thereby contributes to the illumination of the more luminous areas.

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

In addition to the aforementioned reflector surfaces 401, 402 and 404 of the light-guiding element 40, the latter still has optical screening elements 420 in the form of light-scattering transparent plates 420, which extend approximately parallel between two segments 41 and at a small distance from the circuit carriers 30. The anti-glare element 420 is held by means of positioning holes 403 between two respective segments 41.

The FIGS. 8a and b 9a and b show two alternative embodiments of the anti-glare element 420 'and 420 ", respectively FIGS. 8a and 8b 4, the anti-glare element has lens-shaped elevations 422 'with a radius of curvature R arranged in a plurality of rows 421' on one side of the anti-glare element. This optical structure is selected such that the light from the LEDs is deflected downwards in a focused manner. The middle row of lenses is at the thickest point below a major axis of LEDs, causing the deflection down. The shape of the lenticular projections 422 'is selected so that the light is focused more strongly in the vertical direction than in the horizontal direction. In the embodiment shown, the lenticular elevations form wedge-shaped part cylinders with a radius of curvature R. Thus, a uniform illumination of the effective area is 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 with respect to the Entblendungselement 420' remains at a plurality of LEDs without optical effect. As a result, the generated light distribution is retained even in case of inaccuracies in the positioning of the screening element 420 '. The lenticular projections are arranged adjacent to each other in the rows. In other embodiments, gaps may still be provided therebetween.

According to the alternative embodiment according to FIGS. 9a and 9b are only in the upper region of the surface structure of the Entblendungselements 420 "rows 421" with lenticular elevations 422 ", in the example shown, three rows 421" provided. In the lower region of the anti-glare element 420 ", the anti-glare element is matted or made clear.

The FIG. 10 shows in cross-section the anti-dazzle elements 420 "in the installed state, the positioning pin 423" engages in the positioning holes (in the FIG. 10 not visible) of the segments of the light-guiding element. As a result, the anti-glare element 420 "is held in a defined position relative to the LEDs 35. The glare elements 420 and 420 'are produced in the same way as in FIG FIG. 10 positioned for the glare element 420 ".

Alternatively, at the location of the anti-glare element 420, a refractive device, such as e.g. a lens, be provided. In this embodiment, preferably two opposite reflector surfaces 401 and 402 and the two intermediate lateral reflector surfaces 404 are integrally provided in a segment 41 of the light-guiding element.

The stacked segments 41 of the light-guiding element 40 therefore each form, through their reflection surfaces 401, 402 and 404, a compartment which is assigned an LED or a row of LEDs on the circuit carrier. The light control can be adjusted by selecting the angle of the reflector surfaces 401, 402 and 404 precisely to the requirements, because the LED 35 emits light as a nearly point-shaped radiator with a defined scattering angle. In contrast to a surface-emitting light source, such as a fluorescent tube, which emits light over the entire circumference, therefore, the light-guiding element 40 according to the present embodiment can be tuned much more precisely to the arrangement of the light sources.

The arrangement of LEDs on the circuit carriers 30 is shown in FIGS FIGS. 6a to 6g shown. It is to be understood that different circuit carriers may be provided on different sides of the support member 20 of a lamp insert according to an embodiment of the invention.

The basic structure of the arrangement of the LEDs on a circuit carrier 30 is shown in FIG FIG. 6a shown. The circuit carrier 30 has an electrical connection 301 in the form of a plug, which is connected to the operating device 50 or the control module 55 via an electrical cable (not shown). On the circuit carrier 30 are further arranged in multiple rows and columns positions 303 which are connected to electrical traces (not shown) on the circuit substrate 30 to solder at these positions LEDs. Further, bridge elements 302 are each provided for LED position. By plugging or unplugging 0 Ω jumpers, the electrical supply of a designated position for the LEDs can be activated or deactivated.

The FIGS. 6b to 6g For example, indicate how intended positions 303 can be populated with LEDs. All LED positions can be occupied by active LEDs (FIG. 6d). Such an arrangement is preferred for a side of the support member 20 which faces in a direction in which a particularly large amount of light is to be emitted. For circuit carriers facing in directions where less light is to be emitted, some columns or all but one column may have no function ( Figures 6b, 6c and 6f ). Furthermore, the rows within a circuit carrier 30 can also be occupied differently (see FIGS. 6e and 6g ). The latter is particularly preferred if a particular light effect with respect to the appearance of the luminaire in the longitudinal direction of the support element to be generated. For example, it may be desirable for the luminaire to be brighter in the lower area and darker in the upper area, which can be achieved by the corresponding uneven arrangement of the LEDs. Also, an asymmetric distribution within the rows may be desired. Corresponding examples are in the Figures 6f and 6g specified.

As previously described with reference to the description of the light guide element 40, a segment 41 or a compartment, respectively, which results from the top side and the bottom side of two successive segments 41, is assigned to an LED row. It is also possible that the segments 41 of the light-guiding element are not made identical to one another. Then can be generated by the appropriate arrangement or wiring of LEDs on the circuit board, a different light distribution of the luminaire insert.

The placement of the circuit carriers 30 with LEDs in different positions of the regular matrix can actually be done physically by filling only certain positions. But it is also possible that LEDs are arranged at each position of the matrix, but are switched only in different groups, wherein the circuit is preferably carried out by the control module 55. This allows different at different times of the day Create lighting effects. Furthermore, the lighting effects can be brought about not only by the switching on and off of LEDs, but also by continuous dimming of LEDs or groups of LEDs at selected positions within the circuit carrier 30.

Further embodiments of luminaire inserts according to the invention are in the FIGS. 11, 12 and 13 shown. In these luminaire inserts, the light-deflecting elements 40 ', 40 "and 40"', in contrast to the previously described light-guiding elements 40, are formed entirely of refractive material. The surface structure of the light guide elements is designed to act like a lens and to achieve a similar light control as the previously described embodiment of the light guide elements 40. The light directing elements of refractive material as well as the embodiments with reflective surfaces comprise a plurality of segments 41 ', 41 "and 41, respectively '", each associated with a group or row of LEDs at a height on the support member. According to the embodiments according to FIGS. 11 and 12 the light guide elements are formed from approximately part-cylindrical elements, which can be placed on the carrier element 20 from the outside. According to the embodiment according to FIG. 13 the segments 41 "'of the light-guiding element 40"' are approximately cylindrical and are pushed axially onto the carrier element. The embodiment according to FIG. 13 also has the peculiarity that some of the segments 41 "'(in the FIG. 13 the lower three segments) are formed asymmetrically. This embodiment is preferred for luminaires which are intended to produce different light distributions on different sides. For example, it can be provided that on one side of the luminaire, the light is directed more strongly down to illuminate, for example, a mastnahen area under the lamp, while on the other side a wide-beam light distribution is generated.

Numerous modifications of the previously described embodiments may be made within the scope of the invention as defined in the claims. For example, the invention is not limited to planar circuit carriers 30, as shown in the figures. It is also possible to use cylindrical or semi-cylindrical or partially cylindrical circuit carriers. Likewise, flexible circuit carriers can be applied to correspondingly cylindrical or partially cylindrical surfaces of the carrier element. Furthermore, it has to be considered that, instead of separate circuit carriers 30, the circuit carrier, that is, the conductor tracks with appropriate insulation, can also be formed directly on the surfaces of the support member 20.

LIST OF REFERENCE NUMBERS

10

structural element

11

angle approach

20

support element

21

surface section

22

groove

27

threaded pin

30

circuit support

31

screw

32

hole

35

LED

40, 40 ', 40 ", 40"'

Light guide elements

41, 41 ', 41 ", 41"'

Segment of the light-guiding element

50

control gear

51

power terminal

55

control module

60

cover

80

housing roof

81

mast lights

82

Transparent cover

83

Optical assembly 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 "

Entblendungselement

421 ', 421 "

string

422 ', 422 "

lenticular elevations

423 ', 423'

projections

1001

beam of light

1002

beam of light

1003

beam of light

1004

beam of light

Claims (17)

1. Light element for installation in a light housing, wherein the light element comprises:

   A longitudinal carrier element (20), which is arranged along its circumference about the longitudinal axis for the accommodation of circuit carriers (30) for LED's (35), or which comprises surface sections along its circumference about the longitudinal axis which are themselves arranged at least partially as circuit carriers for LED's, a structure element (10) which is connected to the carrier element (20) and serves to support the carrier element (20) in the light housing, at least one electrical operating device (50) for the electrical supply of LED's, and a plurality of LED's (35), which are arranged on at least one of the circuit carriers (30), wherein the light element comprises a light directing element (40, 40', 40", 40"'), which is arranged about the circumference of the carrier element (20) and outside the circuit carrier (30),

   characterised in that the light directing element (40) comprises lens elements.
2. Light elements according to claim 1, wherein the circuit carriers(s) (30) and/or the carrier element (20), in a cross-section perpendicular to the longitudinal axis of the carrier element, define a regular n-corner, preferably with five or more corners, or wherein the circuit carrier(s) and/or the carrier element define a cylinder or cylinder sections along the longitudinal axis of the carrier element.
3. Light element according to one of the preceding claims, wherein the carrier element (20) and/or the circuit carrier(s) (30) are formed from a material with a thermal conductivity of at least 15 W/Km, preferably at least 100 W/Km, in particular of aluminium or an aluminium alloy.
4. Light element according to one of the preceding claims, wherein the structure element (10) is in a thermal contact to the carrier element (20).
5. Light element according to one of the preceding claims, wherein the structure element (10) connects to the carrier element (20) in the latter's longitudinal direction.
6. Light element according to one of the preceding claims, wherein the operating device (50) is integrated into the structure element (10).
7. Light element according to one of the preceding claims, wherein the carrier element (20) comprises a securing device for securing a light housing component.
8. Light element according to one of the preceding claims, wherein the light element comprises one or more cover elements (60) in surface areas which are not occupied by LED's of the carrier element (20) and/or of the structure element (10).
9. Light element according to one of the preceding claims, wherein electrical structural elements are arranged on one or more of the circuit carriers (30), in particular sensors for temperature measurement, sensors for light strength measurement, and/or electrical structural elements for switching the current supply for the LED's.
10. Light element according to one of the preceding claims, wherein the LED's are arranged on the at least one circuit carrier (30) in one or more gaps, which extend in the longitudinal direction of the carrier element (20), and/or at least some of the LED's are arranged in lines transverse to the longitudinal axis of the carrier element on the circuit carrier (30), wherein, in particular, at least some of the LED's are distributed in an irregular manner onto the lines and gaps of the circuit carrier (30).
11. Light element according to one of the preceding claims, wherein individual LED's or groups of LED's are connected electrically separated from one another and can be actuated individually, in particular being capable of being switched off and/or dimmed individually.
12. Light element according to one of the preceding claims, wherein the carrier element (20) is hollow in the interior.
13. Light element according to one of the preceding claims, wherein the operating device (50) comprises a control module (55), which individually controls individual LED's or groups of LED's.
14. Light element according to claim 13, wherein the light directing element (40, 40', 40", 40"') comprises a number of repeated segments (41, 41', 41", 41'"), in particular a stacking of segments (41,41', 41", 41"') in the direction of the longitudinal axis of the carrier element (20), wherein, in particular, in each case a segment (41,41', 41", 41"') of the light directing element (40, 40', 40", 40"') is allocated to an LED or a row of LED's, which extend transverse to the longitudinal axis of the carrier element.
15. Light element according to one of the preceding claims, wherein parts of the light directing element are connected to one another by means of a carrier structure, which is formed in particular from a transparent or opal material, or is provided with light diffusion elements.
16. Light element according to one of the preceding claims, wherein the LED's (35) are distributed onto the circuit carriers (30) in such a way, or can be actuated, such that the light radiation from the light element is effected in a plane perpendicular to the longitudinal axis of the carrier element in essentially two directions, in particular symmetrical, wherein the two directions in the plane enclose an angle of between some 90° to some 180°, in particular some 100° to some 160°.
17. Light element according to one of the preceding claims, wherein the LED's are distributed on the circuit carriers (30) in such a way, or can be actuated, such that the light diffusion produced by the light element is close to isotropic in a plane perpendicular to the longitudinal axis of the light carrier (20).

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