EP2348250A1 - Linear LED light, in particular LED ring light - Google Patents

Abstract

The lamp has a channel whose outwardly open side forms a light-emitting surface. LEDs are arranged along a linear form extension of a light component at a side of the channel on an LED support surface i.e. printed circuit board, where the side of the channel is fixed opposite to the light-emitting surface. Each LED includes a shell shaped optical device i.e. reflectors (30, 38), for light deflection in main radiation direction of each LED. A lateral reflecting surface (32b) is provided between the light-emitting surface and the support surface at side of the channel in an area. The LEDs are high power LEDs.

Description

The invention relates to a luminaire, the luminous means of which are formed by LEDs (light-emitting diodes), which also include OLEDs (organic light-emitting diodes).

LEDs as lighting means are increasingly used in the field of outdoor lighting, especially in street lighting. These are the conventional bulbs in Energy consumption and the frequency of necessary maintenance often superior. However, for LED-based luminaires, it is not possible to resort to conventional luminaire designs because the luminous means in the case of an LED luminaire are in the form of many small point-shaped light sources which require other optical deflecting means, in particular reflectors, to produce a desired light distribution.

Desired light distributions can be adjusted for example by the special design of the support surfaces on which the LEDs are arranged. However, if there are bends, these solutions are often very expensive. Other concepts include optical devices such as refractive elements or reflectors on LEDs. However, these can not be aligned in all directions to produce a desired light distribution, especially when the LEDs are arranged in a recess of the lamp component. Furthermore, the design of LED lights are often limited by the need to provide a heat sink immediately in the vicinity of the LEDs.

The object of the present invention is to provide an LED luminaire, in particular for outdoor use, e.g. a street lamp to provide which desired light distributions on the level to be illuminated, such as a walkway, a bicycle lane or a road or a place to allow.

The present invention solves the problem by a lamp, in particular an outdoor lamp, with a plurality of LEDs as lighting means, wherein the lamp has a lamp component with a linear extension and defines the lamp component in a cross section perpendicular to the linear extension of a channel, wherein the outside open side of the channel forms a light exit surface of the lamp and the LEDs along the linear extension of the lamp component on a side opposite the light exit opening side of the channel on an LED support surface, in particular a board, are arranged, each LED individually an optical device for light deflection of a Main emission of the respective LED is assigned and wherein at least on one side the channel is provided in a region between the light exit surface and the LED support surface, a lateral reflection surface.

The invention can provide that the said linear extension of the lamp component describes a curve, in particular a closed curve, or a polygonal pull of a plurality of straight sections, in particular a closed polygon.

In one embodiment of the invention, it may be provided that the luminous component is annular or elliptical or forms a polygon, which approximates a ring or an ellipse.

In embodiments of the present invention, a light beam emanating from the LED is deflected at least twice. In this embodiment, the first deflection is performed by the LEDs individually associated optical devices. The second deflection takes place on the lateral reflection surface, which is in particular a continuous reflection surface for the entire luminaire component, in the direction of the light exit opening of the luminaire component. The double deflection of the main emission direction of each LED makes it possible to form a given light field contour for the desired lighting task for a given shape of the luminaire component and with the LEDs arranged in the channel. In preferred embodiments, said twice-redirected light beam contains the majority of the light emanating from the LED; It is also the light beam of the LED can be deflected a total of at least twice. According to embodiments of the present invention, the lighting component forms a channel which extends in a line along a curve, in particular a closed curve. According to an alternative embodiment, a polygonal draft, which is to be understood as meaning a plurality of segments which are just lined up, in particular also a closed polygon, describe the linear extension of the luminaire component. The closed curve or closed polygon allows light to be emitted in all directions, for example radially to a circle defining the lamp component, when all the LEDs with their individual optical devices are set equal with respect to the radius of the circle. The individually assigned to the LEDs optical devices However, according to a preferred embodiment may also be set differently with respect to the linear extensions of the lamp component. In this way, for example, in the case of a circularly symmetrical luminaire component, a light field distribution can be generated which generates the illumination of an elongated surface, for example for the illumination of a sidewalk. It is also possible to set a light distribution with a light band bend, as is preferred for illuminating streets by lights arranged laterally of the street. The inventive design of the reflection or Lichtumlenkeinrichtungen within the lamp component therefore allows a high freedom of design with respect to the shape of the lamp component for different light distributions. In particular, the shape of the luminaire component does not necessarily correspond to the light distribution to be generated.

According to preferred embodiments of the invention, the lighting component is annular or elliptical. These shapes allow a high degree of flexibility in the selection of the light field distribution to be generated. According to an alternative embodiment, the luminaire component is formed by a polygon, which approximates a ring or an ellipse. Since this form is made of straight sections, such a lighting component can be made easier. For example, an equilateral hexagon or an equilateral octagon, which already approximates a ring very well, are preferred. It can also be provided uneven side lengths, so that an ellipse can be approximated.

In a particular embodiment of the invention, said luminaire component can be straight and / or have one or more straight grooves, wherein along these grooves in the manner described above LEDs and optical devices associated therewith are provided.

The invention can provide that the luminaire component has a plurality of grooves, which in particular can run parallel to one another. In a particular embodiment, such mutually parallel grooves border directly on each other. It can also be provided that in a groove of the lamp component several channel-shaped inserts, in particular Reflector inserts are provided, in each of which the LEDs individually assigned optical devices are provided, these channel-shaped inserts in particular define one or more parallel and / or directly adjacent grooves, in each of which one or more LEDs individually associated optical devices are arranged.

According to a preferred embodiment, the LEDs are arranged at approximately equal intervals along the line-shaped extent of the lamp component on the LED carrier surface. In particular, LEDs are arranged only along a line which corresponds to the line-shaped extension of the lamp component.

According to one embodiment, the optical devices associated with the LEDs effect a deflection of at least part of the light emanating from the LED, in certain embodiments also the total light emanating from the LED between 50 ° to 100 °, in particular approximately 90 °, in the direction of the lateral reflecting surface. In this case, the deflected beam of the LED, which defines the main emission direction of the LED, does not have to meet the shortest path to the lateral reflection surface. In particular, a rotation angle of the optical deflection device may be selected differently with respect to a surface normal that intersects the LED and the main emission direction of the LED. In this case, the angle of rotation of the optical deflection device can be chosen so that the deflected beam completely or partially passes directly to the light exit surface and / or completely or partially falls on a reflection surface, which deflects the light incident on them further, so that it directly or after further Reflections to the light exit surface passes. In preferred embodiments, it is provided that the angle of rotation is selected so that the deflected light beam impinges on the said lateral reflection surface.

The zero point of this rotation angle can in principle be arbitrarily set, and preferably this definition applies to all optical devices which are individually assigned to an LED. For example, a rotation angle of 0 ° can be defined by the fact that, in the corresponding position, the main light component of the light emitted by the optical device Light is emitted in the radial direction toward the center of the lamp out or the main emission of this main light portion radially towards the center of the lamp has. In the preferred embodiments, the axis with respect to which said rotation angle is defined is the same for all LEDs or all of an LED individually associated optical devices.

According to a preferred embodiment, the LEDs individually associated with the optical devices in different angles of rotation with respect to an axis by the respective LED, in particular a surface normal through the LED support surface, mountable or adjustable. For example, it can be provided that the optical devices in different angular positions on the LED support surface can be inserted. Alternatively, a continuously variable rotation mechanism can also be provided. Preferably, the optical devices are still adjustable in the desired direction during assembly of the luminaire at the point of use.

The invention can provide that one or more optical devices, which are each associated with an LED, and the light component carrying the respective optical device are set up so that the optical device is guided through the respective one or only in discrete predetermined angles of rotation with respect to an axis LED, in particular a surface normal through the LED support surface, can be mounted. The optical devices are thus in each case only in one or more discrete orientations with respect to the groove or the line which follows the groove, mountable. The light component carrying the optical device may in particular be a reflector or reflector section which preferably accommodates a plurality of optical devices of the type described above and optically cooperates with the optical device or devices for emitting light from the luminaire.

The invention can provide that the optical device is secured by a positive connection against rotation about the said axis from the position corresponding to a predetermined angle of rotation.

The invention can provide that the optical device is inserted into a non-circular opening. The invention may provide that the optical device has projections and / or depressions, which cooperates with complementary projections and / or depressions, in particular indentations and bulges of the edge of an opening in the optical device-carrying lamp component, to the optical device against a Twist to secure the said axis.

The invention may provide in one embodiment that the optical device is connected by a latching connection with the optical component carrying the lamp component, wherein the latching connection may be provided in particular to secure the optical device against tilting relative to the said axis.

It may be provided, in particular, that the optical device has one or more latching lugs and one or more projections which engage over the edge of an opening in the luminaire component carrying the optical device in each case on opposite sides.

It can also be provided that the optical device has one or more projections which engage over or under the edge of an opening in the optical component carrying the luminaire component on a relative to a latching nose or against the locking lugs position.

In a preferred embodiment, the optical device in an opening of the optical device supporting the lamp component is tilted, wherein by tilting relative to the said axis by the respective LED made the locking connection and in particular one or more locking lugs can be engaged. In this case, it can be provided, in particular, that the optical device can be inserted in a position tilted relative to the mounted state against the said axis, wherein in this tilted position, in which the latching connection is not yet established, the optical device against rotation about the axis is secured or a rotational movement about this axis is at least limited.

The invention can provide that the optical device associated with an LED is formed in one piece and / or is otherwise configured such that it can be mounted as a complete unit on the luminaire component carrying the optical device.

One or more of the LEDs individually associated optical devices may each include a deflection device that generates a light deflection due to a reflection and / or due to a refraction of light, or form such a deflection device. In preferred embodiments, for example, prism elements with at least three facet surfaces are provided as an optical device or component of such an optical device, wherein on one facet a total reflection is effected and the other surfaces serve as light entrance surface and light exit surface. According to another preferred embodiment, however, optical devices with mirrored surfaces are provided. In particular, the optical device can contain or consist of an approximately shell-shaped curved reflection surface. This can divert a diverging beam coming from the LED in the direction of the lateral reflection surface and thereby reduce the divergence of the beam as it emanates from the LED even more.

In a preferred embodiment, the optical device or at least parts of the optical device are formed of plastic, wherein in a further development of this embodiment, at least one or more surfaces of the optical device with a reflective coating, in particular a reflective coating, preferably provided with a high reflectance ,

The invention may provide that the optical device has a concave curved reflection surface and a concave curved reflecting surface opposite this further reflection surface, wherein in a preferred embodiment, this further reflection surface at least partially reflects light on said concave curved reflection surface.

The invention can provide that, in the case of an optical device with a curved reflection surface in the optical device, a light path is provided past this curved reflection surface, which has one or more reflection surfaces, at which light of the light-emitting diode is reflected in the mounted state of the optical device.

It may be provided, in particular, that the optical device has a concave curved reflector and a gap through which light can emerge on the rear side of the reflector, ie on the opposite side to the concave reflection surface, wherein preferably on the back of the reflector, the Split in the direction of the light path downstream of the light emitting diode from the optical device, one or more reflective surfaces are provided. Additionally or alternatively it can be provided that the optical device in the beam path to the said gap or away from said gap has one or more reflective surfaces.

The lateral reflection surface is arranged in the cross section perpendicular to the line-shaped extension of the lamp component at an angle between 60 ° and 90 °, preferably approximately 75 ° or 80 °, to the light exit surface. This tendency allows for a light deflection by the LED individually assigned device of about 90 ° and after further reflection at the lateral reflection surface a light emission of 40 ° to 80 °, preferably 50 ° to 70 °, in particular about 60 ° relative to the solder on the light-emitting surface. Depending on the setting of the devices individually assigned to the LEDs, the main radiation direction of the light beam emitted by an LED can be adjusted away from the luminaire in the direction of the object to be illuminated. In the case of an annular or approximately ring-shaped luminaire, the lateral reflection surface is preferably arranged on the side of the luminaire pointing inwards. Then, depending on the setting of the individual light-guiding means, the main luminous flux can be set radially outwards or with a desired tangential deflection. However, according to an alternative embodiment, the said lateral reflecting surface may also be mounted on the outwardly facing side of the channel. In this embodiment, the main light output from the light exit surface in the direction of the lights inside. In this case, the beams of the LEDs cross each other on opposite sides of the ring. The crossing point does not have to inevitably lie in the middle of the lamp, because the light output does not have to be radially inward, but may also have a tangential component, depending on the setting of the individual optical devices associated with the LEDs.

According to a further preferred embodiment of the present invention, a second lateral reflection surface is arranged opposite the first-mentioned lateral reflection surface in the groove of the luminaire component. Preferably, the second lateral reflection surface in the cross section perpendicular to the longitudinal extension of the lamp component at an angle between 60 ° and 90 °, in particular about 85 °, to the light exit surface. The second reflection surface may reflect scattered light or a secondary luminous flux emitted by the individual optical device or a luminous flux passing through the individual optical devices. The secondary light component can serve to lighten the area of the luminaire, which is not detected by the main emission directions. For example, an annular lamp without incident light portion of the area within the ring will appear dark when the main light output of the lamp is made radially outward over the first lateral reflecting surface.

According to embodiments of the present invention, the optical device of the luminaire individually associated with the LEDs can be designed in such a way that the proportion of the light which is emitted as a secondary light component by the optical device is small in relation to the fraction of the light which has been described above Way is deflected by a deflection device, such as a prism or a reflector, or is discharged directly from the LED without reflection or deflection by refraction of light from the optical device and is not Bestanteil the secondary light component. For example, between 5% and 20% of the luminous flux emitted by the LED may be emitted by the optical device as a secondary luminous flux. In order to enable this proportion of light, for example, an opening can be provided between the LED support surface and the optical device. Alternatively, a slot may also be provided in the optical device or in a part of the optical device to allow direct passage of light without deflection at the optical device. According to an alternative embodiment, a prism body may also be used as optical device or part of the optical device be provided, which has a plurality of facets, wherein at least two facets point in different directions and each allow a light exit. As with the previously described embodiment having an aperture or slot in or on a reflective optical device or part thereof, the minor light component is about 5% to 20% of the luminous flux emitted by the LED.

The first and second reflection surfaces may together or together with one or more further reflection surfaces form a reflector channel, in which said optical devices are arranged and to which these devices may possibly also be attached. This reflector channel may extend over the entire channel of the above-mentioned lamp component or only over part of this channel. In the latter case, it may be advantageously provided that a plurality of reflector channels together form a continuous channel-shaped reflector which extends over the entire channel of the lamp component. In a special embodiment with a self-contained channel of the lamp component, it can be provided that such a reflector extending over the entire channel of the lamp component consists of six parts which adjoin one another directly and together define a continuous channel-shaped reflector.

According to a preferred embodiment, the luminaire component is formed from a solid thermally conductive material, in particular from an aluminum body. The luminaire component can serve as a heat sink for the LEDs.

The invention can provide that the lamp is held on a single support arm. This is favored by a massive design of the lamp component, on which the support arm attacks. According to alternative embodiments, however, two or more support arms may be provided, which are arranged in particular at equal intervals along the line-shaped extensions of the lamp component and on which the lamp component is held. Preference is given to two opposing support arms, which extend from the lamp component inwards, where they are connected to a lamppost.

According to a preferred embodiment, a cavity is provided in the at least one support arm of the previously described embodiments of the lamp, which is dimensioned to accommodate electrical equipment, such as in particular a ballast for the LEDs. Within the luminaire component, especially when curved, there is not enough room to provide a cavity sufficient to accommodate a ballast. Since the brackets usually extend straight from the luminaire component, they provide enough space to stow ballasts. The connection between the lamp component and the LED support surfaces, in particular the boards on which the LEDs are mounted, can be made via an electrical connector, which is arranged in a connection region between the support arm and the lamp component.

Figur 1

zeigt eine Schnittdarstellung durch einen Teil einer LED-Leuchte, wobei der Schnitt senkrecht zur Längserstreckung des Leuchtenbauteils der Leuchte erfolgt.

Figur 2

zeigt eine Querschnittsdarstellung der Leuchte nach Figur 1 in einem Schnitt senkrecht zur Längserstreckung der Leuchte an einer anderen Stelle.

Figuren 3a bis 3c

zeigen schematische Aufsichten auf Ausführungsformen der LED-Leuchte von der Lichtaustrittsseite her.

Figuren 4a bis 4c

zeigen eine schematische Darstellung der Lichtfeldverteilung der Leuchte nach Figuren 3a bis 3c dargestellt als Lichtstärkeverteilung in Polardarstellung einer Lichtstärkemessung in einer Kegelmantelkurve.

Fig. 5

zeigt einen Reflektorabschnitt, der bei einer weiteren Ausführungsform der Erfindung verwendet werden kann.

Fig. 6

zeigt eine optische Einheit gemäß einer weiteren Ausführungsform der Erfindung.

Fig. 7

zeigt die optische Einheit der Fig. 6 in dem an dem Reflektorabschnitt nach Fig. 5 montierten Zustand in einer Draufsicht,

Fig. 8

zeigt die optische Einheit nach Fig. 6 in dem an einem Reflektorabschnitt nach Fig. 5 montierten Zustand in einer Querschnittsansicht,

Fig. 9

zeigt in einer perspektivischen Darstellung einen Reflektorabschnitt, in dem eine optische Einheit nach Fig. 6 montiert ist und eine weitere optische Einheit sich in einem verkippten Zustand befindet, wie er bei der Montage der optischen Einheit auftritt.

Preferred embodiments and further advantages of the present invention will be described below in conjunction with the accompanying drawings. The figures show the following:

FIG. 1

shows a sectional view through a portion of an LED light, wherein the section is perpendicular to the longitudinal extent of the lamp component of the lamp.

FIG. 2

shows a cross-sectional view of the light after FIG. 1 in a section perpendicular to the longitudinal extent of the luminaire at another location.

FIGS. 3a to 3c

show schematic plan views of embodiments of the LED light from the light exit side.

FIGS. 4a to 4c

show a schematic representation of the light field distribution of the luminaire FIGS. 3a to 3c shown as light intensity distribution in polar representation of a light intensity measurement in a cone-sheath curve.

Fig. 5

shows a reflector portion which can be used in another embodiment of the invention.

Fig. 6

shows an optical unit according to another embodiment of the invention.

Fig. 7

shows the optical unit of Fig. 6 in the at the reflector portion after Fig. 5 assembled state in a plan view,

Fig. 8

shows the optical unit Fig. 6 in the at a reflector section after Fig. 5 mounted state in a cross-sectional view,

Fig. 9

shows in a perspective view a reflector section, in which an optical unit according to Fig. 6 is mounted and another optical unit is in a tilted state, as occurs in the assembly of the optical unit.

Referring to the FIGS. 3a to 3c is the overall shape of an embodiment of the lamp in the supervision to recognize. The luminaire comprises a luminaire component 1 in the form of a solid aluminum body, which in a cross section perpendicular to the circumferential direction, as in the Figures 1 and 2 represented, the shape of a groove defined. Within the channel are 36 LEDs 2, which are arranged at equal intervals or angular intervals along the radius of the lamp component. At least 12 LEDs are preferred. In specific embodiments, 24 LEDs or more are provided.

The lighting component 1 is made of solid aluminum to have the necessary stability for the lamp and because it also serves as a heat sink for the LEDs 2, which are designed as high-power LEDs and must be cooled accordingly serves. Referring to the Figures 1 and 2 the structure of the lighting component can be seen in a cross section. The luminaire component 1 defines in its cross section a channel 3, which is closed at the bottom by a transparent cover 4, which forms the light exit surface of the luminaire. As in the Figures 1 and 2 which show two cross sections of the same luminaire, however, at different positions in the circumferential direction, the cross-sectional shape of the grooves may change slightly. In the FIG. 1 the location of the luminaire is shown in cross section, which is a support arm 5 attached to the lamp component 1. In the FIG. 2 is shown another adjacent cross-section. The cover 4 is made narrower in the area of the support arm than in the other areas along the circumference of the lamp.

The cover 4 completely closes the channel 3 on the underside of the lamp. In particular, seals 6 are provided on both circumferential sides of the cover 4 to the lighting component 1. The cover is formed by a plurality of spring elements 7, one of which in cross section in FIG. 1 is shown secured to a recess in the lamp component 1. The cover 4 may even be firmly glued to the lamp component, because no accessibility to the LEDs is necessary due to the long life of the LEDs.

The structure and mode of operation of the various reflector assemblies and of the luminous means within the channel 3 will be described below.

Referring to FIG. 2 is an LED 2 can be seen in cross section, which is mounted on a circuit board 8 and is electrically connected thereto. The board 8 extends over a portion of the lamp component 1. In the embodiment shown, the board 8 forms a planar ring portion which comprises 1/6 of the circle of the lamp component. On each board 8 are each four LEDs as in the FIGS. 3a to 3c can be seen, arranged. However, in other embodiments, the circuit board 8 can also extend over the entire region of the channel 3 or over the entire optically effective region of the lamp component 11. In particular, it can form a flat ring which is inserted in a channel 3 of the luminaire component 1.

Below the LED 2, an optical device 9 is provided for each LED individually, which deflects the light from the main emission of the LED, which in the drawing of Fig. 2 pointing vertically downwards. In the embodiment shown, the optical device 9 individually assigned to the LED comprises an approximately scalloped reflector 10, which in FIG FIG. 2 in cross section and in FIG. 1 can be seen from the side. The shell-shaped reflector 10 is arranged below the LED 2 so that it deflects the light beam, which leaves the LED 2 in the direction of its main emission downward by 90 °. Due to the curved reflector shape of the shell-shaped reflector 10, the light beam divergent from the LED is at the same time partially bundled. The light beam is then deflected a second time on a lateral reflection surface 11 and finally leaves the channel 3 through the transparent cover 4, as through the light beam 12 for the main emission direction of the light in FIG. 2 is shown. For this purpose, the first lateral reflector surface 11 is arranged at an angle of 75 ° or 80 ° to the light exit surface 4 in order to effect the deflection downwards in the direction of the light exit surface 4.

A second light bundle, the so-called secondary light, leaves the optical device 9 through a gap 13 which is formed between the optical device 9 and the LED support surface 8, without a light deflection takes place. This proportion of the light emitted by the LED via the gap 13 is relatively small; it is, for example, between 5% and 20% of the total luminous flux of the LED. The part of the light passing through the gap 13 is incident on a second lateral reflection surface 14, which forms an angle of 85 ° with respect to the light exit surface. Due to the inclination, the light beam is directed to the light exit surface 4 and leaves the light exit surface, as in FIG. 2 indicated by the light beam 15. The light beam 15, which represents the direction of the secondary light, points in the direction of the lamp interior. Due to the secondary light, a brightening of the luminaire in the central area of the luminaire is achieved.

It should be understood that the direction of the main light portion 12 and the minor portion 15 also in the reverse manner, as in FIG. 2 shown, can be done. In this case, the main light components emitted by the LEDs cross approximately in the middle of the luminaire. The overall light distribution of the luminaire remains very similar to that in FIG. 2 illustrated embodiment.

In particular embodiments, the cover 4 is transparent in the area between the reflective surfaces 11 and 14 and not or not completely transparent in its remaining areas, for example light-scattering or wholly or partially absorbing. In particular, it can be provided that, outside the region between the reflection surfaces 11 and 14, the cover 4 is opaque, which can be achieved, for example, by being printed with an opaque material. In other embodiments, provision may be made for the cover 4 to be transparent in the region of the channel 3 and not or only partially translucent and / or light-scattering in the remaining regions.

A special feature of the luminaire is that the LEDs 9 individually associated optical devices 9 can be rotated in different angular positions with respect to the vertical axis through the LED. For example, it can be provided that the optical devices 9 can be mounted in different plug-in positions on the LED support surface, a reflector or reflector section or another carrier element. According to another embodiment, a rotating device enabling continuous rotation may also be provided. In the FIGS. 3a to 3c show three different embodiments of the lamp, in which the optical devices 9 are aligned differently. In the embodiment according to FIG. 3a have all the optical devices radially inward (each designated 0 °), whereby a homogeneous overall light distribution of the lamp is generated. This embodiment or setting of the optical devices 9 is preferred when the lamp is to illuminate a larger place evenly. The associated light field distribution, measured as a light intensity distribution curve in a conical jacket around the vertical axis of the luminaire, is shown in FIG FIG. 4a shown. It is homogeneous, ie circular in shape.

The FIG. 3b shows an embodiment or setting of the optical devices 9, which is suitable, an elongated distance below the lamp, for example a Walkway or bike path to light. The optical devices 9 at the positions in the longitudinal direction of the track to be illuminated, which in the FIG. 3b corresponds to the vertical direction, stand at 0 °. Accordingly, the light of these LEDs is emitted radially outward after the second reflection at the first lateral reflection surface 11. With increasing angular distances of the LEDs from the vertical direction, the rotation angle of the optical devices 9 increases to + 50 ° and -50 °, respectively. The light of the LEDs with the deviating from 0 ° rotation angle of the optical device 9 is delivered with tangential component of the lamp. The light of the main emission of these LEDs is therefore also approximately along the track to be illuminated, which in FIG. 3b corresponds to the vertical direction. The resulting light field distribution is in FIG. 4b shown.

Another embodiment or setting of the LEDs associated optical elements 9 is in Figure 3c shown. This embodiment produces a so-called Lichtbandknickung (see Figure 4c ), which is advantageous for illuminating a road course from a side-mounted street lamp street lamp. Compared to the FIG. 3b It can be seen that the setting of the optical devices 9 are not arranged mirror-symmetrically with respect to the vertical planes through the lamp, but is different on the two halves of the lamp. The generated light field distribution is therefore not symmetrical aligned along the vertical direction of the luminaire, as in the FIG. 4b but has a kink. As a result, a street laterally of the lamp, on the opposite side of the lamp indicated by the symbol 16, advantageously illuminate without unnecessarily brightly illuminating the house facade.

Through the exemplary representations in the FIGS. 3a to 3c is understood by those skilled in the art that can be set to achieve a desired lighting task by the combination of the ring-shaped arrangement of the LEDs and the settings of the LEDs individually associated optical devices. In principle, any street sign can be illuminated under or next to the luminaire. According to the preferred embodiment, the optical devices 9 associated with the LEDs can still be set in different positions at the installation site of the luminaire, so that the light field contour can still be set during assembly of the luminaire can. In other embodiments, the position of the optical device is determined during assembly. It can be provided in particular that the optical device is designed so that it can be mounted for each LED only in a very specific position, this position may be different for different LEDs. It can also be provided that a plurality of discrete positions are provided for each LED, in which the respective optical device can be mounted.

The illustrated embodiment of the lamp has on the lamp component 1 in the circumferential direction on a support arm 5, which, as in FIG. 1 shown hollow. Inside the support arm 5 can be electrical equipment, in particular the ballast, arrange. Due to the curvature of the lamp component is within the lamp component usually no place. The ballast is connected via a connector 17 and other electrical connections, which are not shown in the drawings. The support arm 5 extends from the lamp component 1 down toward the interior of the circular lamp component 1, as in the projection in the FIGS. 3a to 3c you can see. There, the support arm 5 is mounted on a lamppost. According to other embodiments, more than just a support arm may be provided. In this case, two opposing support arms or more support arms, which are fastened at uniform angular intervals in the periphery of the luminaire component 1, are preferred.

In the Fig. 5 to 9 another embodiment of the invention is illustrated. In this embodiment, a channel-shaped reflector 30 is inserted into the channel 3 of the lamp component. This reflector consists of six reflector sections 32 which, when combined, form an annular groove and cover one sixth of the circumference in each case, that is to say an angle of 60 °. Such a reflector section 32 is in Fig. 5 in a plan view and in Fig. 9 to see in a partial perspective view. How best in Fig. 9 can be seen, the reflector portion 32 has a bottom 32a and two side walls 32b and 32c, which the two reflection surfaces 11 and 14 of the in the Fig. 1 and 2 shown embodiments corresponds. The side walls 32b and 32c may in particular, as described above for the reflecting surfaces 11 and 14, be inclined to the light exit surface in the assembled state of the reflector section 32, wherein the light exit surface included angle may be in a cross section perpendicular to the linear extension of the channel 3 in the previously discussed angle ranges. In the bottom 32a of the reflector portion 32 a plurality of, in this embodiment, four approximately circular openings 34 are provided. Each of these openings 34 has two recesses 34a which are diametrically opposed to each other with respect to an axis A through the center of the opening 34, and a further bulge 34b circumferentially offset with respect to these recesses 34a. In the embodiment shown, the bulge 34b is offset from the bulges 34a by approximately 90 ° and has an outwardly curved shape, for example in the form of a circular arc section, while the bulges 34a have an approximately rectangular shape. The reflector sections 32 are arranged in the channel 3 of the luminaire component 1 such that the board 8 lies between the bottom 32a of the reflector section 32 and the bottom of the channel 3 and the LEDs 2 are each located in the region of one of the openings 34.

Into the openings 34, an optical unit 36 is used as the relevant LED 2 associated optical device, as in Fig. 6 alone in a perspective view and in Fig. 7 and 8th in a plan view and a cross-sectional view, respectively; Fig. 9 shows an assembled and a partially inserted optical unit 36 in a perspective view. The optical unit 36 is preferably in one piece and also preferably made of plastic and has a shell-shaped reflector 38, a support edge 40, an elastic locking lug 42 and a reflecting surface 44 on the opening of the shell-shaped reflector 38 side facing and two reflecting surfaces 46 and 48 on the the opening of the shell-shaped reflector 38 opposite side. The interior of the optical unit 36 has a cavity bounded by the reflective surfaces 44 and 46 and open upwards to the scalloped reflector 38, so that light in this cavity is on the one hand to the reflecting surfaces 44 and 46 and on the other the inner surface of the shell-shaped reflector 38 can propagate out to be reflected there. In the area of the reflecting surfaces 46 and 48, there is a gap 50 between the lower edge 52 of the scalloped reflector 38 and the reflecting surfaces 46 and 48, so that light can escape from said cavity through this gap 50 to radiate directly from this gap 50 to become or to the reflection surface 48 to be reflected. The associated LED 2 is located as in Fig. 8 illustrated, in the region of this cavity and is arranged so that its light incident on the reflector 38, on the reflector surfaces 44, 46, 48 and into the gap 50, wherein a portion of the light, also directly, to the reflector 38 and the reflection surface 44 over, is radiated.

While in the illustrated embodiment, the annular reflector 30 consists of six individual parts 32, it may also consist of more or fewer individual parts, or may be formed integrally as a whole, so as to form a one-piece, self-contained, e.g. forms annular groove.

The support rim 40 has a rear approximately semi-circular portion 60 with circumferentially extending arcuate slots 62 which lies on the side facing away from the opening of the scalloped reflector 38 side, and two deeper, ie closer to the bottom of the optical unit 36 lying extensions 64th which are connected by a step 66 to the section 60 and extend forward over a relatively short portion of the circumference, so that they, as best in Fig. 7 can be seen to form two lateral extensions on the side of the approximately circular cylindrical body of the optical unit 36, the front edge of which is formed by the substantially annular, the opening of the shell-shaped reflector 38 opposite reflecting surface 44. Below the edge 60, the elastic locking lug 42 is provided.

Due to the shape of the openings 34 with the lateral bulges 34a and the rear bulge 34b on the one hand and the formation of the optical unit 36 with the rear portion of the supporting edge 60, the locking lug 42 and the lower side extensions 64 on the other hand is a particular orientation of the optical unit 36th given when it is inserted into the reflector 30 and the reflector portion 32. To insert, as in Fig. 9 illustrated, an optical unit 36 attached in a tilted position, wherein the step-shaped portion 66 comes to rest in the region of the bulges 34a of the opening 34 and the lateral extensions 64 of the support rim 40 engage under the bottom 32a of the reflector portion 32. By pressing down the back of the optical unit 36, the latching lug 42 in the region of the recess 34b of the opening 34 against the bottom 32a of Reflector portion 32 is pressed and locked, as best in Fig. 8 can be seen, below the bottom 32 a, while the rear portion 60 of the supporting edge 40 rests on the bottom 32 a of the reflector portion 32, so that the bottom 32 a between the rear portion 60 of the supporting edge 40 and the latch is included, so that the optical Unit 36 is thereby fixed. At the same time come when locking the latch 42, the two lateral extensions 64 on the underside of the bottom 32a, ie on the side facing away from the reflector 38 side of the reflector portion 32 to the plant. This is especially in Fig. 7 to recognize where the bottom 32a is shown as a hatched area and the course of the extensions 64 is indicated below the bottom 32a.

In this way, the optical unit 36 can be locked in a fixed predetermined orientation with respect to the channel 3 or the trough-shaped reflector 30, wherein this orientation is predetermined in the manufacture of the reflector portion 32 and the reflector 30 respectively by the shape of the openings. In this embodiment, therefore, the orientation of the optical unit 36, which is assigned to a respective LED 2, already fixed during manufacture. This facilitates the assembly and allows a precise alignment of the optical unit 36 according to the design specifications, without elaborate adjustments are required. A flexibility in lighting design can be achieved by providing standardized reflector sections 32, each with a specific orientation of the holes (and thus the optical units to be used 38). Alternatively, a respective individual sequence of openings with specific orientations can also be punched with a, for example, computer-controlled punching tool, in which the orientation of the punched opening can be determined individually.

In the in Fig. 8 In the inserted state shown, light from the light-emitting diode 2 is irradiated on the shell-shaped reflector 38, which reflects this light, the majority of the reflected light being radiated onto the walls of the reflector 30, but some of the reflected light is also directly reflected by the reflector 30 can leave. On the other hand, a part of the light is incident on the reflecting surface 44 which detects the light depending on its orientation and shape and the desired light distribution Reflects the reflector 38 or immediately, on the reflector 38 over, gives off. Furthermore, a certain proportion of light on the back of the reflector 38 exits via the gap 50, wherein it can be reflected at the reflection surfaces 46 and / or 48. Finally, depending on the position and design of the reflector 38 and the surfaces 44, 46 and 48, a certain amount of light emitted by the light emitting diode 2 light directly to the reflector 38 and the reflective surface 44 over or, through the gap 50th in that the reflector 38 and the reflector surfaces 46 and 48 are emitted directly out of the optical unit 36.

By providing the reflector surfaces 44, 46 and 48, on the one hand, the efficiency of the luminaire is increased. On the other hand, these reflection surfaces can also be used advantageously for the design of the light intensity distribution.

The optical unit 36 is in a preferred embodiment made of plastic, wherein at least the light emitting diode 2 facing the inner surface of the shell-shaped reflector 38 and the reflective surfaces 44, 46 and 48 are reflective, in particular mirror-reflective, e.g. by a reflective coating, applying a reflective foil or the like. Other parts of the optical unit, for example the back of the reflector 36, may also be reflective or mirror-like, in order to increase the efficiency and / or to achieve a specific light distribution.

As in the embodiments described above, the different orientation of the optical device formed here by the optical unit 36 is advantageously used to achieve a specific luminous intensity distribution of the luminaire, as described above.

Numerous variants of the luminaire according to the invention are possible without departing from the scope of the invention as stated in the claims. In particular, the light is not on a circular design, as in the FIGS. 3a to 3c shown, restricted. There are other Umfarigsformen added, with closed peripheral shapes due to the high variability with respect to adjustable light field contours by aligning the individual optical devices on the LEDs are preferred.

Furthermore, the lighting component does not need to be exposed (although this is advantageous in terms of the necessary cooling) but may also have a cover. For example, the entire light can be covered at the top by a common plastic cover to protect against environmental influences. Likewise, the light can be surrounded by a transparent at least in the region of the light exit surface cover.

In further embodiments it can be provided that the luminaire component has a plurality of grooves and / or a plurality of channel-shaped reflectors, which are preferably close to each other. These grooves or channel-shaped reflectors can in particular form a plurality of concentric circles which adjoin one another directly.

In another embodiment, it may be provided that the luminaire component 1 has two straight, preferably parallel grooves or channel-shaped reflectors, wherein the optical devices associated with the LEDs are designed and arranged such that the optical devices in a groove formed in the lamp component is formed by a channel-shaped reflector element that emit light in the opposite direction as the optical devices in the other channel, wherein oppositely in this context may mean that the optical devices in the one channel completely or at least a majority of the light in a first Give half space (0 ° to 180 °) and leave the optical devices of the other channel the light completely or at least majority in the other half-space (180 ° to 360 °). The individual optical devices in a groove can be oriented differently, for example, to bring about a light band bending or to form the light distribution in a different way. In a modification of this embodiment it can be provided that in each case the main light component of the output from the optical devices in the two grooves Light is emitted in each case in the opposite direction or that the main emission direction of the respective main light portions facing in opposite directions.

The features of the invention disclosed in the description, the claims and the drawings may be essential both individually and in any combination for the realization of the invention in its various embodiments.

LIST OF REFERENCE NUMBERS

1

lights component

2

LED

3

gutter

4

Light exit surface, in particular with transparent cover

5

support arm

6

poetry

7

spring element

8th

LED carrier surface, in particular circuit board

9

Optical device

10

Shell-shaped reflector

11

First lateral reflection surface

12

Light beam of the main light component

13

gap

14

Second lateral reflection surface

15

Light beam of the secondary light component

16

Housing page

17

connector

30

reflector

32

reflector section

32a

Bottom of the reflector section

32b

Side wall of the reflector section

32c

Side wall of the reflector section

34

opening

34a

bulge

34b

bulge

36

optical unit

38

reflector

40

supporting edge

42

locking lug

44

reflecting surface

46

reflecting surface

48

reflecting surface

50

gap

52

lower edge of the reflector

60

semicircular section of the bed

62

Long hole

64

extension

66

stepped section

Claims (14)

Luminaire, in particular outdoor luminaire, with a multiplicity of LEDs (2) as luminous means, the luminaire having a light-emitting luminaire component (1) with a linear extension and the luminaire component (1) defining a groove (3) in a cross-section perpendicular to the linear extension, being the outside open side of the channel forms a light exit surface (4) of the lamp and the LEDs along the linear extension of the lamp component (1) on one of the light exit surfaces (4) opposite side of the channel (3) on an LED support surface (8), in particular a circuit board , wherein each LED is individually associated with an optical device (9; 36) for deflecting light of a main emission direction of the respective LED and wherein at least on one side of the channel (3) in a region between the light exit surface and the LED support surface (3) a first lateral reflecting surface (11; 32b) is provided. Luminaire according to claim 1, wherein the optical means (9; 36) associated with the LEDs effect a deflection of the main emission direction of the respective LED (2) from 50 ° to 100 ° in the direction of the first lateral reflection surface (11; 32b). Luminaire according to one of the preceding claims, wherein the LEDs individually associated optical devices (9; 36) in different angles of rotation with respect to an axis by the respective LED (2) can be mounted or adjusted. Luminaire according to one of the preceding claims, wherein the LEDs (9; 36) individually assigned to the LEDs have a curved, in particular a shell-shaped, reflection surface (10; 38). Luminaire according to one of the preceding claims, wherein the first lateral reflection surface (11; 32b) in the said cross section encloses an angle between 60 ° and 90 °, preferably between 70 ° and 85 °, to the light exit surface (4). Luminaire according to one of the preceding claims, wherein in the groove a second lateral reflection surface (14; 32c) opposite to the first lateral reflection surface (11; 32b) is arranged. Luminaire according to claim 6, wherein the second lateral reflection surface (14; 32c) in the said cross section encloses an angle between 60 ° and 90 °, in particular between 80 ° and 90 °, to the light exit surface (4). Luminaire according to claim 6 or 7, wherein a part of the light emitted by the LEDs on the LEDs individually associated optical devices (9; 36) passes directly on the second lateral reflection surface (14; 32c) and deflected to the light exit surface (4) becomes. Luminaire according to one of claims 1, 2 or 4 to 8, characterized in that one or more optical devices (36), which are each assigned to an LED (2) individually, are arranged so that they only in a predetermined angle of rotation or only in one of a plurality of discrete predetermined angles of rotation with respect to an axis by the respective LED (2) are mountable. Luminaire according to one of claims 1 to 9, characterized in that an optical device (36) is secured by a positive-locking device (66) against rotation about the said axis by the respective LED (2) from the position corresponding to a predetermined angle of rotation , Luminaire according to one of claims 1 to 10, characterized in that the optical device (36) by a latching connection (42) with the optical device (36) supporting the lamp member (32) is connected. Luminaire according to one of claims 1 to 11, characterized in that an LED (2) individually associated optical device is designed so that it can be mounted as a complete unit on the optical device (36) supporting the lamp component (32). Luminaire according to one of claims 1 to 12, characterized in that the optical device (36) has a curved reflector (38) for deflecting the light of a main emission of the respective LED and means (46, 48, 50, 52) for emitting a secondary light portion of the reflective surface of the curved reflector, which is emitted in a direction other than the majority of the light emitted by the LED directly or in optical cooperation with said optical device (36). Luminaire according to Claim 13, characterized in that the said device for emitting a secondary light component has one or more reflection surfaces (46, 48).

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