EP2340390A2

EP2340390A2 - Lantern, and method for retrofitting a lantern

Info

Publication number: EP2340390A2
Application number: EP09771474A
Authority: EP
Inventors: Steffen Block; Christoph Neureuther; Ales Markytan
Original assignee: Osram Opto Semiconductors GmbH
Current assignee: Ams Osram International GmbH
Priority date: 2008-10-30
Filing date: 2009-10-19
Publication date: 2011-07-06
Also published as: JP2012507122A; WO2010048922A2; WO2010048922A3; KR20110093819A; CN102197259A; US20120057341A1; DE102008054050A1

Abstract

A lantern is described that comprises a mast (2) and at least two light emitting diodes (4) which are designed to emit electromagnetic radiation (12) having different electromagnetic spectra (17, 19) during operation. The light emitting diodes (4) are mounted within or on the mast (2).

Description

Hospitality

Lantern and method for retrofitting a lantern

A lantern is specified. In addition, a will

Procedure for retrofitting an existing lantern specified. The lantern can serve for general lighting. In particular, the lantern may be a street lamp intended for illuminating traffic routes or public places.

The document DE 203 17 444 Ul describes a lantern.

Among other things, a problem to be solved is to specify a lantern which has an improved shape

Has emission characteristic. Another object to be solved is, inter alia, to provide a lantern, which is particularly well protected from external pollution. Another object to be solved is inter alia to provide a method for retrofitting an existing lantern, by which a lantern with improved radiation characteristics and / or improved protection against pollution can be produced.

In accordance with at least one embodiment of a lantern described here, the lantern comprises a lamp post. The mast der- lantern, for example, be attached to the edge of a road so that it at least in places perpendicular or substantially perpendicular to the ground on which it is attached runs.

The mast serves as a carrier of the light source or the light sources of the lantern. In accordance with at least one embodiment of the lantern, the lantern comprises at least two light-emitting diodes which serve as light sources of the lantern. The light-emitting diodes are preferably light-emitting diodes which emit electromagnetic radiation in the wavelength range of visible light. Preferably, the lantern comprises a plurality of such light-emitting diodes, which together can form the only light source of the lantern. Alternatively, it is possible that the light emitting diodes are additional light sources of the lantern and the lantern has conventional light sources as light source in addition to the light emitting diodes.

In accordance with at least one embodiment of a lantern described here, the lantern comprises at least two light-emitting diodes which are set up to emit electromagnetic radiation with a mutually different electromagnetic spectrum during operation. That is, the lantern comprises at least two light emitting diodes, which are not identical light emitting diodes. The light-emitting diodes differ at least in the electromagnetic spectrum of the electromagnetic radiation emitted by them. For example, at least two light-emitting diodes of the lantern are set up to emit light of different colors during operation.

Furthermore, it is possible for at least two light-emitting diodes of the lantern to have identical light-emitting diode chips, but to have a different luminescence conversion substance. In this way, a difference in the electromagnetic spectrum of the light-emitting diodes in the

Operation of electromagnetic radiation can be achieved. Overall, here is not to understand a small deviation in the spectrum under different electromagnetic spectrum of two light emitting diodes, as may occur, for example, in identical light emitting diodes, but the spectra of the LEDs differ more from each other. The light emitting diodes either emit light of different colors such that the difference can be perceived by a human observer, or the light emitting diodes emit white light of different color temperature, such that the

Difference in color temperature can be perceived by a human viewer.

In accordance with at least one embodiment of a lantern described here, the lantern comprises at least two light-emitting diodes which are fastened in or on the mast. The light-emitting diodes may be light-emitting diodes which emit electromagnetic radiation with a mutually different electromagnetic spectrum during operation.

If light-emitting diodes are mounted in the mast, then the mast has no flat or smooth outer surface, but instead it comprises depressions or recesses in which light-emitting diodes are arranged.

If LEDs are attached to the mast, then the LEDs can be applied directly to the mast or the LEDs are mounted on one or more circuit boards, which are attached directly to the mast.

Overall, the LEDs are not in a further component of the lantern, such as a lamp head, introduced, but the light-emitting diodes are in or attached to the mast and contacted there electrically. The LEDs can be attached directly or indirectly in or on the mast. If the light-emitting diodes are indirectly fixed in or on the mast, then at least one printed circuit board, which is applied to the light-emitting diodes, is located between the light-emitting diodes and the mast. The light emitting diodes facing away from the mounting surface of the circuit board is then mounted in or on the mast. The light-emitting diodes are preferably mounted in or on the mast in such a way that at least part of the electromagnetic radiation generated by the light-emitting diodes during operation is directed away from the mast.

In accordance with at least one embodiment of a lantern described here, the lantern comprises a mast and at least two light-emitting diodes which are set up to emit electrical radiation with mutually different electromagnetic spectrums during operation. The LEDs are mounted in or on the mast.

One lantern described here makes use, inter alia, of the finding that with a fastening of light-emitting diodes in or on the mast a particularly good dissipation of heat generated during operation of the light-emitting diodes can take place via the mast. For example, the light-emitting diodes can therefore be attached to the mast by means of a relatively inexpensive FR4 printed circuit board.

For example, the circuit board is a circuit board having a base body based on a plastic material such as FR4. In the

Base body metal through holes are introduced, which conduct heat from an upper side of the body to the bottom (so-called vias). Furthermore, for thermal Connecting the circuit board to the mast a thermally conductive material (so-called thermal

Interface material). The thermally conductive material may be electrically insulating. By way of example, the thermally conductive material is a double-sided adhesive strip which is arranged between the mast and the printed circuit board.

The heat generated by the light-emitting diodes during operation is dissipated via the mast, which is preferably formed with a metal. This results in better efficiency, greater brightness, better aging behavior and less color shift of the LEDs mounted in or on the mast. In addition, it has been shown that the attachment of lamps in or on the mast causes less pollution of the lamps can take place. For example, with such a trained lantern can be dispensed with a lamp head, which often serves as a resting place for birds. Pollution of the light sources of the lantern, for example, by the feces of birds is thereby reduced.

Furthermore, a lantern described here is characterized in that at least two light-emitting diodes are used, which are adapted to emit during operation electromagnetic radiation having a mutually different electromagnetic spectrum. This has the advantage that the spectrum of the mixed light emitted by the lantern can be adapted to the requirements of the light generated by the lantern by separate control of the different light emitting diodes. For example, the spectrum of the electromagnetic radiation of the mixed light radiated by the lantern can be be optimized so that a reduced insect flight takes place towards the LEDs. As a result, the LEDs are polluted to a lesser extent by insects, which in turn favorably affects the efficiency, the brightness and the aging behavior of the LEDs and thus the entire lantern.

In accordance with at least one embodiment of a lantern described here, the distance between two light-emitting diodes, which are fastened in or on the mast of the lantern, in a main extension direction of the mast is at least 1/40 of the length of the mast. The main direction of extension of the mast is parallel to the mast, for example perpendicular or substantially perpendicular to the ground on which the mast is mounted. The two light-emitting diodes are, for example, the light-emitting diodes which are mounted highest on the mast or in the mast with respect to the ground, and the light-emitting diode which is mounted lowest in or on the mast. The distance between these two light-emitting diodes along the main extension direction is then at least 1/40 of the total length of the mast, the length of the mast being determined from the ground of the mast to its opposite tip. Preferably, a plurality of further light emitting diodes is arranged along the mast between the two light emitting diodes.

Overall, this is a lantern specified, which is characterized by a special large luminous area. In other words, a relatively large portion of the mast serves as a carrier for the light-emitting diodes, so that the overall result for the lantern is a particularly large light area. That is, the light extraction of the lantern over a relatively large area, resulting in a reduction in the luminance of the emitted by the lantern compared to a lantern leads, in which the light source is not distributed over the mast, but for example, is centrally located in a lamp head. This results in less glare from the light generated, and it can be a more homogeneous, energy-saving illumination by means of the lantern. In addition, reduced by the increased luminous area and the resulting reduced luminance, the attractiveness of the lantern for insects.

In accordance with at least one embodiment of a lantern described here, the distance between two light-emitting diodes, which are fastened in or on the mast, in a main extension direction of the mast is at least 1/20, preferably at least 1/10 of the length of the mast. In this way, the luminous area of the lantern is further increased.

In accordance with at least one embodiment of a lantern described here, the lantern comprises at least one

Row of light emitting diodes extending along the main extension direction of the mast, wherein each row comprises at least two light-emitting diodes. Preferably, the lantern comprises two or more such rows. The light emitting diodes of a row can be connected in series, for example, and can be arranged on a common printed circuit board for this purpose. By means of the formation of rows of light-emitting diodes, the pole of a lantern can be equipped in a particularly simple manner with a multiplicity of light-emitting diodes.

In accordance with at least one embodiment of a lantern described here, at least one light-emitting diode is the Lantern arranged at a top of the mast. This light-emitting diode can serve, for example, to illuminate the mast itself and thus increases the visibility of the road course, for example, for the users of motor vehicles. The arranged at the top of the mast LED can emit light that differs in terms of its color from the light of the other LEDs of the lantern. As a result, the recognizability of the lantern is further increased. Furthermore, the light-emitting diode can serve as a design and decoration element.

In accordance with at least one embodiment of the lantern, the mast has a bend. The mast may for example be bent in the manner of a gooseneck. The top of the mast is then below the highest point of the mast. In this embodiment too, a light-emitting diode can be arranged at the top of the mast, which increases the visibility of the mast. Due to the bending of the mast, it is then possible that the light emitting diode also illuminates the mast, so that the mast for pedestrians or cyclists is particularly visible. The LED thus also serves to illuminate the mast. Furthermore, the light-emitting diode can serve as a design and decoration element.

In accordance with at least one embodiment of a lantern described here, the lantern is free of a lamp head. That is, the lantern includes, in addition to the mast, no further component, which is arranged, for example, at the top of the mast and are concentrated in the light sources of the lantern. The abandonment of one

Lamp head is particularly possible because at least two LEDs are mounted in or on the mast. The absence of a lamp head causes that For example, for birds no seat is given on the lantern, which reduces pollution of the lantern. In addition, a lantern without lamp head offers less wind resistance. This can be especially in areas of high wind speed, such as

Coastal areas or in the mountains, prove beneficial. The absence of a lamp head then improves the life of the lamp.

In accordance with at least one embodiment of a lantern described here, the mast tapers in the direction of its tip. That is, the mast is tapered towards its tip, so that the cross-sectional area of the mast reduces towards its tip. This further reduces the possibility that, for example, birds can settle on the lantern.

In accordance with at least one embodiment of a lantern described here, the mast is formed at least in places as a reflector for electromagnetic radiation generated by the LEDs during operation. That is, generated by the light-emitting diodes in operation electromagnetic radiation can impinge on the mast and is then reflected by this with a reflectivity of at least 50%, preferably at least 80%, more preferably of at least 90%. For this purpose, the mast can be coated at least in places with a particularly well reflective material such as aluminum. Overall, this measure further increases the efficiency of light generation by the lantern. Furthermore, this measure is a homogeneous

Light distribution safe and ensures a low glare from the generated light. In accordance with at least one embodiment of a lantern described here, a plurality of light-emitting diodes is arranged as a ring, wherein the ring encloses the mast. That is, preferably at least four light-emitting diodes are arranged annularly around the mast. This light ring may for example be mounted at a height of at least 1 m and not more than 2 m above the ground on the mast. The ring of light-emitting diodes can increase the visibility of the lantern and thus make it more visible to drivers and other road users the road and the road limit. The light-emitting diodes, which are arranged as a ring, can differ in terms of the color of the light emitted by them from the light-emitting diodes, which are attached as the light source of the lantern in or on the mast. Moreover, it is possible that the arranged as a ring LEDs are part of the actual light source of the lantern. Furthermore, it is possible that colored light-emitting diodes, which do not form the actual light source of the lantern, are arranged in further patterns on or in the mast. These light-emitting diodes can be arranged, for example, in such a way that they form simple logos, coats of arms, information boards or others.

In accordance with at least one embodiment of a lantern described here, the lantern comprises a sensor which is fastened on or in the mast, the sensor serving to determine at least one of the following measured variables: temperature, air humidity, ambient brightness, visibility conditions. By means of the sensor, it is therefore possible to determine measured variables as a function of which the light sources of the lantern can be controlled. It is possible that the lantern comprises several sensors. So the lantern can include a temperature sensor, a sensor for the Humidity and another sensor for the ambient brightness.

To determine the visibility, ie to determine whether rain, fog, snow, smog or the like is present, a light signal can be sent from one lantern to the neighboring lantern. A sensor then determines the intensity of the light signal. From this it is possible to draw conclusions about the scattering of the light signal and thus on the visibility. To generate the light signal in the visible or non-visible range of the electromagnetic spectrum, a light-emitting diode or a laser diode can be used in or on the mast.

In accordance with at least one embodiment of a lantern described here, the lantern comprises a device which is set up to control and / or regulate the electromagnetic spectrum and the intensity of the mixed light emitted by the light-emitting diodes. The device is, for example, a digital circuit with a

Microcontroller or an analog circuit. By means of the device, individual light-emitting diodes of the lantern or individual rows of light-emitting diodes of the lantern can be activated. For example, the light-emitting diodes can be switched on by means of the device, switched off, the current with which the light-emitting diodes are operated can be changed continuously or stepwise and / or the light-emitting diodes can be dimmed. This can be done via the change in the current intensity and / or a pulse width modulation. Since at least two of the

LEDs with respect to their electromagnetic spectrum differ from each other, by controlling the light emitting diodes, a change in the electromagnetic Spectrum and the intensity of the mixed light emitted by the light emitting diodes through the device.

In this case, the device can control the spectrum and the intensity according to a program sequence. For example, a control of the light-emitting diodes and thus the spectrum and the intensity of the mixed light emitted by the light-emitting diodes can be effected as a function of an input by a user or of the time of day and / or the season. Moreover, it is possible that the device is additionally or alternatively suitable for controlling the electromagnetic spectrum and the intensity. For example, the lantern for this purpose includes a sensor that determines the temperature of the LEDs and / or the ambient brightness. Depending on these values, regulation of the light-emitting diodes and thus of the electromagnetic spectrum and the intensity of the emitted mixed light can then take place, by means of which a specific desired value for measured variables such as temperature, ambient brightness or visual relationship can be achieved.

In other words, due to the device, the lantern does not have a fixed, invariable spectrum of the electromagnetic radiation, but the electromagnetic spectrum and the intensity of the emitted light can be changed by means of the device. Thus, the lantern can respond to external influences such as ambient brightness, ambient temperature, temperature of the LEDs, humidity, for example, rain, time, season, visibility or other events. This can increase the light quality of the lantern. Furthermore, the generated by the lantern in operation Light to the application requirements, such as the time of day, the weather and the like are adjusted.

In accordance with at least one embodiment of a lantern described here, the lantern comprises a device that is set up to control and / or regulate the electromagnetic spectrum and the intensity of the mixed light emitted by the light-emitting diodes in dependence on at least one of the following measured variables: air humidity, temperature , Ambient brightness, time, season,

Visibility. Sensors, which may be necessary to determine these quantities, may be located in or on the pole of the lantern or are located centrally outside the lantern, whereby the same measured variables can be used for a large number of lanterns. The device for controlling the LEDs and thus the electromagnetic spectrum and the intensity of the emitted mixed light can be centrally located for a plurality of lanterns outside the lantern.

It also specifies a method for retrofitting a lantern. The method preferably comprises the following steps: First, the lamp head is removed from an existing, conventional lantern. In a further method step, which can also take place before the lamp head is removed, at least two light-emitting diodes which are set up to emit electromagnetic radiation with a mutually different electromagnetic spectrum during operation are fastened to the mast.

By means of the method, it is possible in particular, lanterns, as in connection with the preceding Embodiments are described to manufacture. That is, all features disclosed in connection with a lantern described herein are also disclosed for the method.

In the following, lanterns described here as well as the method described here for retrofitting a lantern are explained in greater detail on the basis of exemplary embodiments and the associated figures.

FIGS. 1A to 1C show a schematic diagram

Representations an embodiment of a method described here for retrofitting a

Lantern .

FIGS. 2 to 6 show schematic representations

Embodiments of described here

Lanterns.

FIG. 7 shows a schematic plan view of the illumination of a street with lanterns described here.

FIGS. 8A to 8D show, by means of schematic plots, electromagnetic spectra of FIG

Light-emitting diodes as used in lanterns described here.

FIG. 9 shows the control of light-emitting diodes in a manner described here with reference to a schematic circuit diagram

Lanterns. FIG. 10 shows the control of a lantern described here on the basis of a flowchart.

FIG. 11 shows, by way of a schematic circuit diagram, the control of a plurality of those described here

Lanterns.

The same, similar or equivalent elements are provided in the figures with the same reference numerals. The figures and the proportions of the elements shown in the figures with each other are not to be considered to scale. Rather, individual elements may be exaggerated in size for better representability and / or better understanding.

An exemplary embodiment of a method described here for converting a lantern, in particular a street lamp, is explained in more detail in conjunction with FIGS. 1A to 1C. FIG. 1A shows in a schematic representation a conventional lantern 1 with a mast 2 and a lamp head 3 attached to the top 5 of the mast 2.

In the method step described in conjunction with FIG. 1B, the lamp head 3 is removed from the mast 2 so that the tip 5 of the mast is exposed. The tip 5 is not necessarily tapered in this case, but merely represents the upper end of the mast 2. The tip can then be closed, for example, for protection against rain.

In conjunction with the figure IC is shown schematically that at least one row 14 of LEDs 4 along the Mast 2 is attached to the mast. For example, the light emitting diodes 4 of a row 14 are applied to a common printed circuit board. By way of example, the common printed circuit board may be a flexible printed circuit board having a main body made of FR4 and having thermal vias. Furthermore, at least one sensor 10 can be attached to the mast 2, with which, for example, the ambient brightness in the region of the lantern 1 can be detected. The maximum distance D between two LEDs 4 in the direction of the main extension direction R of the mast 2 is preferably at least 1/40 of the total length L of the mast 2. The total length L of the mast 2 is measured from the ground on which the mast 2 is attached until to the top 5 of the mast 2. The total length L of the mast 2 is for example between 6m and 10m.

Preferably, a plurality of light emitting diodes 4 is attached to the mast 2. Preferably, at least two of the light-emitting diodes 4 differ with regard to the electromagnetic spectrum of the light emitted by them during operation.

In conjunction with FIGS. 2A to 2C, various possibilities for attaching a row 14 of light-emitting diodes 4 to a mast 2 are described.

In conjunction with FIG. 2A, an embodiment is described in which a multiplicity of light-emitting diodes 4 are fastened to the mast 2 along a single row 14. In operation, the light-emitting diodes 4 emit electromagnetic radiation 12 which mixes with the mixed radiation of the lantern 1.

Either by the assembly or optical elements such as lenses and / or reflectors of the LEDs 4, the direction the emitted radiation can be adjusted depending on the application requirements of the lantern 1.

In conjunction with FIG. 2B, an exemplary embodiment of a lantern 1 described here is shown, in which two rows 14 of light-emitting diodes 4 are fastened to the mast 2. In this exemplary embodiment, the rows 14 can run obliquely, so that the main emission direction of the light emitting diodes 4 is directed towards the substrate on which the lantern 1 is mounted. However, it is also possible that the

Direction of emission emitted by the light-emitting diodes 4 electromagnetic radiation 12 is determined by optical elements, which are arranged downstream of the LEDs 4.

In contrast to the exemplary embodiment of FIG. 2B, in the exemplary embodiment of FIG. 2C, a lantern 1 is illustrated in which at least three rows 14 of light-emitting diodes 4 are fastened to the mast 2. In this embodiment, there is an illumination by the lantern on both sides of the mast to here a homogeneous illumination and maximum

To achieve distances from adjacent masts. The middle row 14 serves to illuminate the vicinity of the mast 2 better.

Due to the fact that the LEDs 4 in the

Embodiments of Figures 2A to 2C are distributed along a relatively large part of the mast 2, the overall result for the lantern 1, a relatively large luminous area. This results in a particularly low luminance and thus in a low glare effect by the lantern. 1

In connection with FIGS. 3A to 3G, exemplary embodiments of lanterns 1 described here are closer explained in which the LEDs 4 are mounted in the mast 2. The mast 2 has for this purpose recesses in which the LEDs 4 are arranged. Radiation exit surfaces of the LEDs 4 can be flush with the outside of the mast 2 or located below or above the outer surface of the mast 2.

In connection with FIG. 3A, an exemplary embodiment of a lantern 1 described here is explained in more detail, in which a plurality of light-emitting diodes 4 are integrated in recesses in the mast 2. In the embodiment of Figure 3A, the mast has a tip 5, to which the mast 2 tapers toward. On the top 5, a further light-emitting diode 4 or a sensor 10 may be arranged.

In contrast to the exemplary embodiment described in connection with FIG. 3A, in connection with FIG. 3B, an exemplary embodiment is described here

Lantern shown in which the mast 2 does not taper in the direction of its tip 5. The mast 2 is just completed at its top 5.

An exemplary embodiment is explained in more detail in conjunction with FIG. 3C, in which, unlike the exemplary embodiment described in connection with FIG. 3A, all the light-emitting diodes 4 are arranged in a single recess of the mast. The LEDs 4 are covered with a cover 8. The Abdeckplatt 8 can be transparent or milky. The cover plate 8 is flush with the outer surface of the mast 2 from. in the Embodiment of Figure 3C, the LEDs 4 are arranged opposite to two sides of the mast.

In contrast, an exemplary embodiment is explained in more detail in conjunction with FIG. 3D, in which the light emitting diodes 4 are arranged on at least three sides of the mast 2.

In the embodiment described in connection with FIG. 3E, the mast 2 is arranged obliquely in the region in which the light emitting diodes 4 are arranged, so that the main emission direction of the electromagnetic radiation 12 generated by the light emitting diodes during operation is oblique to the main extension direction due to the inclination of the light emitting diodes 4 R of the mast 2 runs. The light-emitting diodes 4 can be covered by a cover plate 8, which terminates flush with the outer surface of the mast 2.

An exemplary embodiment of a lantern 1 described here is explained in more detail in connection with FIG. 3F, in which the light emitting diodes 4 are arranged in the mast 2, such that the main emission direction of the radiation 12 emitted by the light emitting diodes 4 during operation runs parallel to the main extension direction R of the mast 2 , In the main emission direction of the LEDs 4 downstream

Areas of the mast 2 are formed as a reflector 7, which reflects electromagnetic radiation 12 striking it. In the region of the reflector 7, the mast 2 is designed, for example, in the shape of a cone or truncated cone, the tip of the cone or of the truncated cone being directed away from the tip 5 of the mast. The mast 2 may be formed to form a reflector 7 either of a good reflective material or is a good reflective material, such as aluminum, coated. The reflector 7 and the LEDs 4 may be covered by a cover plate 8, which is flush with the outer surface of the mast 2, which does not serve as a reflector 7. About the formation of the reflector 7 while the emission of the lantern 1 can be adjusted.

In connection with FIG. 3G, an embodiment of a lantern 1 described here is explained in more detail, in which the mast 2 has at least two tips 5. At each of these peaks rows 14 of LEDs 4 are attached. The LEDs 4 can be mounted in or on the mast 2.

In connection with FIGS. 4A to 4C, exemplary embodiments of lanterns 1 described here are shown, which have a lamp head 3. On or in the mast 2 of the lanterns 1 not shown light-emitting diodes 4 can be fixed, as it is for example in

Connection with Figures 2 and 3 is explained in more detail. The lamp heads 3 of the lanterns illustrated in connection with FIGS. 4A to 4C can comprise light-emitting diodes 4 as light sources. The luminous head 3 of the lantern 1 is bent or angled in these embodiments. These light-emitting diodes 4 can in particular serve to illuminate the mast 2 itself, so that it is better recognizable to pedestrians and other road users. As a lamp head while a component of the lantern 2 is understood, which is attached to the top 5 of the mast and the mast 2 at least in places in the lateral direction, that is perpendicular to the Hauptersteckungsrichtung R of the mast 2, surmounted. In conjunction with FIGS. 5A to 5C, schematic illustrations show that the light-emitting diodes 4 can also be fastened on or in the mast of the lantern 1 in the lower third of the mast 2. In this case, the LEDs 4 serve in particular for better visibility of the mast itself. The lantern may comprise a main light source, which is different from the LEDs 4, and is arranged for example in a lamp head 3. However, the lanterns 1 can also light emitting diodes 4 as

Main sources include, as explained for example in connection with Figures 2 and 3.

In FIG. 5A it is shown that the light-emitting diodes 4 can be arranged around the mast 2 in the manner of a ring. In conjunction with FIG. 5G, it is shown that the light-emitting diodes 4 can be arranged in a row, as a result of which a light strip is formed. In conjunction with FIG. 5C, it is shown that individual light-emitting diodes 4 can be fastened on or in the mast 2 in any desired manner.

In connection with FIG. 6, an exemplary embodiment of a lantern 1 described here is explained in more detail, in which the mast 2 has a bend 6 such that the tip 5 of the mast 2 is located below the highest point of the mast 2. At the top 5, a light emitting diode 4 or a sensor 10 may be arranged. On or in the mast 2 itself LEDs 4 may be arranged, as explained in more detail, for example, in conjunction with Figures 2 and 3.

In conjunction with FIG. 7, the illumination of a road 15 and a walkway 16 with lanterns 1 described here are explained in more detail. It is shown schematically that not only on the road 15, but also on the sidewalk

16 illuminated surfaces 13 can be produced by the lanterns described here. For example, the lantern to light emitting diodes 4 include in or on the mast 2 of the lantern 1, which illuminate the street 15. Moreover, it is possible that the lantern 1 light emitting diodes 4 on or in the mast or at the top of the mast or in a lamp head of the lantern, with the sidewalk or other remote from the road edge regions of the lantern 1 can be illuminated. The lighting edge area - so too

Example of the walkway 16 - can be independently controlled and pending above measured variables, such as ambient brightness and time to be adjusted.

In conjunction with FIGS. 8A to 8D, the electromagnetic spectra are shown on the basis of schematic plots

17 of LEDs, as used in lanterns 1 described here, applied schematically. The spectra are plotted in the form of the relative spectral emission. Furthermore, the plots show the spectral

Eye sensitivity curve 18.

FIG. 8A shows the electromagnetic spectrum 17 of an ultra-white LED with a high proportion of blue and a relatively low yellow component, which is obtained, for example, by a

Lumineszenzkonversionsstoff is generated, which is arranged downstream of a blue emitting LED chip. FIG. 8B shows the electromagnetic spectrum of a neutral-white light-emitting diode in which the yellow component is increased in comparison with the spectrum of FIG. 8A. FIG. 8C shows the electromagnetic spectrum 17 of a warm-white light-emitting diode with a weaker blue component and an increased yellow component. The FIG. 8D shows the spectra 19 of deep blue 19a, blue emitting 19b and green emitting light emitting diodes 19c.

In addition, red, green, yellow and differently colored emitting LEDs can be used in lanterns described here.

Preferably, at least two light-emitting diodes are used, which differ from one another with regard to their electromagnetic spectrum. For example, find in one

Lantern 1 ultra white LEDs, neutral white LEDs, warm white LEDs, and / or colored LEDs. Depending on the control of the LEDs, that is, depending on the current with which they are operated, or their dimming by a

Pulse width modulation circuit, the mixed light emitted by the lantern can be adjusted in terms of its spectral properties and its intensity.

Thus, the spectrum can be, for example, in the twilight in

Depending on the season - for example, in spring and summer - optimize to be particularly insect-friendly. Such insect-friendly optimization may be at the expense of color rendering index and / or lantern efficiency. To a

For example, to improve color rendering and / or efficiency, it is possible to change the spectrum of the lantern towards better color rendering and / or better efficiency after midnight, when insect flight is reduced. For an improved

Insect-friendliness, for example, it is advisable to reduce the blue light component of the emitted light. For this purpose, for example, in the lantern exclusively or reinforced warm white light emitting diodes for lighting use find. Furthermore, the use of light emitting diodes is possible, which are designed in particular insect friendliness, for example, emit very little UV radiation.

Further, it is possible that the electromagnetic spectrum and the intensity of the mixed light emitted from a lantern are adjusted depending on the weather conditions such as rain, fog, snow or smog. In each of these cases, for example, a change in the electromagnetic spectrum and / or the intensity of the mixed light emitted by the lantern can take place.

Furthermore, it is possible to adapt the electromagnetic spectrum of the emitted mixed light as a function of the time of day and / or of the season. For example, the spectrum and / or the intensity of the mixed light depending on the moon times (full moon, half moon, new moon), the seasons or the degree of cloudiness occur.

It is also possible to adapt the electromagnetic spectrum and the intensity of the mixed light emitted by the light emitting diodes of the lantern to other requirements such as, for example, a particularly good color rendering value. This can be beneficial, for example, in pedestrian areas during twilight and early evening. For example, such a high color rendering light is desired for shopping areas or in the area of restaurants and bars.

The electromagnetic spectrum and the intensity of the mixed light emitted by the lantern may also be adjusted depending on external events such as a car accident, a construction site, a detour or the like become. For example, in the event of an accident, the lanterns in the vicinity of the scene of the accident are operated with maximum brightness and maximum color rendering index. The paramedic can then better recognize the injuries of the accident participants. In construction, however, it may be sufficient if the maximum brightness is selected. The lanterns can be controlled centrally or locally by security forces.

In conjunction with FIG. 9, an exemplary embodiment of a lantern described here is explained with reference to a schematic circuit diagram, in which regulation and control can take place as a function of the events and environmental influences just described. The lantern comprises a plurality of rows 14 of light emitting diodes 4, which may be connected in series within the rows 14. Alternatively, the light-emitting diodes 4 can be controlled and / or regulated by power electronics, which are connected to a microcontroller. The rows 14 are connected to a device 11 comprising, for example, a microcontroller. Optionally, the microcontroller may be connected to a sensor 10, which determines measured variables such as atmospheric humidity, ambient temperature, temperature of the light emitting diodes 4 and / or ambient brightness. Furthermore, the device 11 may alternatively or additionally be suitable for controlling or regulating the light-emitting diodes 4 as a function of fixed programs such as the time of day, the annual calendar or external inputs 20 by the user.

As an alternative to the circuit diagram shown, it is also possible for the individual light-emitting diodes 4 or the individual rows 14 of light-emitting diodes 4 to be connected separately to the device 11. In this case, a particularly accurate generation of the Mixed light of the lantern 1 possible because each LED 4 can be addressed individually. The change in the electromagnetic spectrum and the intensity of the emitted mixed light of the lantern 1 can be effected by dimming the LEDs 4. For example, different rows 14 of light emitting diodes 4 comprise different groups of light emitting diodes. The dimming can be done by lowering or increasing the current at which the LEDs are operated. Alternatively, it is possible that the dimming of the light emitting diodes 4 takes place by means of a pulse width modulation circuit.

For example, the lantern 1 comprises a row 14a with ultra-white light-emitting diodes, as described in connection with FIG. 8A. Furthermore, the lantern 1 comprises a row 14b with neutral white light-emitting diodes, as well as two rows 14c with warm-white light-emitting diodes. If, for example, in the period between twilight and midnight the insect friendliness of the lantern 1 is increased, the rows 14a and 14b are not operated or only with low intensity. The rows 14c, however, can be operated at full intensity, whereby the lantern 10 emits a particularly insect-friendly mixed light, which has only a small proportion of blue. After midnight, when the insect flight is reduced, all the rows 14a, 14b, 14c can be operated with a same current, so that the lantern emits mixed light with a good color rendering value. The rows 14a, 14b, 14c can be operated with reduced intensity and thus with higher efficiency.

In conjunction with FIG. 10, a flow chart is explained in more detail, according to which a lantern, as described in connection with FIG. 9, for example can be operated. The following briefly explains the elements of the flowchart:

A: The program starts.

B: In dependence of an internal clock of the device 11, the first program part is started, for example, it is the beginning of twilight.

C: Optionally, in addition to the internal clock, an input can be made by a sensor 10 which, for example, detects the ambient brightness in the region of the lantern 1.

D: The row 14a of light-emitting diodes is dimmed to a predetermined value or to a value calculated according to the sensor input.

E: The row 14b of LEDs is dimmed to a predetermined value or to a value calculated according to the sensor input.

F: The row 14c of light emitting diodes is dimmed to a predetermined value or to a value calculated according to the sensor input.

G: Depending on the internal clock, a second subprogram will be started, for example when darkness sets in.

H: Optionally, an input can be made by a sensor 10. I, J, K: The rows of LEDs 14a, 14b, 14c, for example geditnmt such that a particularly insect-friendly mixed light of the lantern 1 results.

L: Depending on the internal clock, a new subprogram will be started, for example at midnight.

M: Optionally, an input may be made by a sensor 10 when, for example, events such as rain or the like occur.

N, O, P: There is a dimming of the rows 14a, 14b and 14c for situation-adapted light, for example, a high color rendering value after midnight or particularly glare-free light of reduced intensity in the case of rain.

Q: Start of a subroutine depending on the time of day, for example at sunrise.

R: Optional input of a measured value by a sensor 10.

S, T, U: There is a dimming of the row 14a, 14b, 14c of light emitting diodes to produce the desired mixed light, for example, slowly reducing the intensity to full brightness.

V: A repetition of the flowchart in Element A.

In connection with the figure 11 is another

Embodiment of lanterns 1 described here explained in more detail. In this embodiment, a plurality of lanterns 1, as in connection with the figure 9 are connected to a central device 11 for controlling or regulating the lantern. For example, the device 11 can take over the control of all lanterns 1 of a street. The control of the lanterns 1 can be done in response to a sensor 10, which determines, for example, the humidity and / or ambient brightness, and by inputs 20, which can be done by persons and means of which, for example, an adjustment of the lighting to events such as an accident the street to be illuminated can take place. For example, by entering a user, the intensity in the event of an accident of the mixed light generated by the lanterns 1 can be increased to a maximum value in order to optimally illuminate the scene of the accident. Once the accident site has been cleared, it is possible, in turn, to return by inputting a user to the normal program sequence, as explained in connection with FIG. 10, for example.

The invention is not limited by the description based on the embodiments of these. Rather, the invention encompasses any novel feature as well as any combination of features, including in particular any combination of features in the claims, even if this feature or combination itself is not explicitly stated in the patent claims or exemplary embodiments.

This patent application claims the priority of German Patent Application DE 102008054050.1, the disclosure of which is hereby incorporated by reference.

Claims

claims

1. Lantern, especially street lamp, with

- a mast (2) and

5 - at least two light emitting diodes (4), which are adapted to emit during operation electromagnetic radiation (12) having a mutually different electromagnetic spectrum (17,19), wherein

- The LEDs (4) are mounted in or on the mast (2). LO

2. Lantern according to the preceding claim, which is free of a lamp head (3).

3. Lantern according to one of the preceding claims,

L5 is arranged at the at least one light emitting diode (2) on a tip (5) of the mast (2).

^"4. lantern according to any preceding claim, in which the mast (2) in the direction of its tip (5)

20 rejuvenated.

5. Lantern according to one of the preceding claims, wherein the distance (D) between two light-emitting diodes (4) in a Haupterstrechungsrichtung (R) of the mast (2) is at least 5 1/40 of the length (L) of the mast (2).

6. Lantern according to one of the preceding claims, wherein at least one row (14) of light-emitting diodes (2) along the main extension direction (R) of the mast (2) 0 is arranged, each row (14) at least two

Includes light emitting diodes (4).

7. Lantern according to one of the preceding claims, in which the mast (2) has a bend (6).

8. Lantern according to one of the preceding claims, wherein the mast (2) at least in places as a reflector (7) for the light-emitting diodes (2) generated in operation electromagnetic radiation (12) is formed.

9. Lantern according to one of the preceding claims, wherein a plurality of light-emitting diodes (2) is arranged as a ring (9), wherein the ring (9) surrounds the mast (2).

10. Lantern according to one of the preceding claims with

at least one sensor (10) which is fastened on or in the mast (2), the sensor (10) serving to determine at least one of the following measured variables: temperature,

Humidity, ambient brightness, visibility.

11. Lantern according to one of the preceding claims with

- A device (11) which is adapted to the electromagnetic spectrum and the intensity of the

Controlling light emitting diodes emitted mixed light and / or to regulate.

12. Lantern according to the preceding claim, in which the device (11) is set up to control and / or regulate the electromagnetic spectrum and the intensity of the mixed light emitted by the light-emitting diodes in dependence on at least one of the following measured variables: air humidity, temperature, Ambient brightness, time, visibility.

13. Method for retrofitting a lantern with the following steps: Removing a lamp head (3) from a mast (2) of a lantern (1),

- Attaching at least two light-emitting diodes (2) which are adapted to emit during operation electromagnetic radiation (12) having a mutually different electromagnetic spectrum (17,19) on the mast (2).

14. A method according to the preceding claim, wherein a lantern is produced according to at least one of claims 1 to 12.

15. A method of operating a lantern according to any one of claims 1 to 12, wherein at a predetermined time of the color of the light emitted by the light emitting diodes of the lantern mixed light is changed from low color rendering index light to high color rendering index.