EP2561267A1

EP2561267A1 - Lighting device, in particular for converting existing lamps to led technology

Info

Publication number: EP2561267A1
Application number: EP10781820A
Authority: EP
Inventors: Franz Hund
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-20
Filing date: 2010-10-26
Publication date: 2013-02-27
Also published as: WO2011131219A1; DE202010005910U1

Abstract

The invention relates to a lighting device (1), preferably for illuminating public spaces, such as streets, squares, transportation stops, sidewalks, or cycleways, comprising: at least one LED lighting means (2, 3), preferably in the form of a planar arrangement of light-emitting diodes; at least one electrical connection element (4, 4', 10, 11, 12) for connecting the LED lighting means (2, 3) to an electrical current/voltage supply; and at least one carrier plate (5), to which at least the LED lighting means is fastened in a thermally conductive manner; the lighting device being characterized in that the carrier plate (5) is an aluminum composite plate, which has an upper cover layer (5b) and a lower cover layer (5c) made of aluminum or an aluminum alloy, preferably AlMg 1, and a core (5a), preferably made of plastic and/or a mineral material, especially preferably having a polymer-based binder, and/or a metal material, especially preferably having a honeycomb structure or the like, and in that the LED lighting means (2, 3) is in thermally conductive contact with one of the cover layers (5b).

Description

Illuminating device, in particular for converting existing luminaires to LED technology

description

The invention relates to a lighting device according to the preamble of claim 1, preferably for the illumination of public spaces, such as streets, squares, stops, pedestrian or cycle paths, comprising:

at least one LED illuminant, preferably in the form of a planar arrangement of light-emitting diodes;

- At least one electrical connection means for connecting the LED bulb to a power supply of electrical Stron; and

- At least one support plate to which at least the LED illuminant is heat conductively attached.

Especially due to increasing energy costs, there is currently great interest in retrofitting lighting equipment, especially for the illumination of public spaces, to the particularly economical LED technology, which can be achieved with comparable lighting effect energy savings in the range of 70%.

Advantageously, LED lighting means in the form of areal arrangements of light-emitting diodes are used in this context, in which individual LEDs are arranged in the form of an array or a matrix. Despite the relatively low electrical power consumption, however, heat losses occur even with such bulbs, and the corresponding waste heat must be dissipated so that it does not cause thermal damage to the device.

Previously known lighting devices of the type mentioned above use for this purpose relatively large and massive heat sink made of aluminum. It should be emphasized in particular as disadvantageous that the known lighting devices are thereby relatively heavy and bulky, which

CONFIRMATION COPY particularly detrimental to the applicability of retooling existing lighting equipment (lights) effect.

The invention has for its object to further develop a lighting device of the type mentioned in that the versatility is particularly increased when converting existing lighting equipment.

The invention solves said object by means of a lighting device having the features of the attached claim 1. Advantageous developments of the invention are the subject of subclaims, the wording of which is hereby included by express reference in the description in order to avoid unnecessary text repetitions.

According to the invention, a lighting device, preferably for the illumination of public spaces, such as streets, squares, stops, pedestrian or cycle paths, comprising:

- At least one electrical connection means for connecting the LED bulb with an electrical power supply; and

- At least one support plate, on which at least the LED bulbs

Heat conductive is attached;

characterized in that the carrier plate is an aluminum composite plate having an upper cover layer and a lower cover layer of aluminum or an aluminum alloy, preferably AlMg l, and a core, preferably a plastic core, most preferably polyethylene, and that the LED illuminant with one of the cover layers is in heat-conducting contact.

Surprisingly, the applicant has found that when using such a support plate no additional heat sink are required to avoid any thermal impairment in practical use of the lighting device. Thus, the invention achieves a smaller and lighter lighting device, as in the state of Technique is the case, so that the desired improved flexibility results in use.

A first development of the present invention provides that the support plate on the outside of the upper cover layer and / or on the outside of the lower cover layer, a lacquer layer, preferably baked enamel, and / or a protective film, preferably made of plastic.

Particularly preferred in this context, the use of a commercially available DIBOND ^® -Verbundplatte (Alcan Singen GmbH) which is existing within the scope of the present invention demands on the support plate in particular mass. Alternatively, xtrobond composite panels, ALUCOBOND ^® composite panels (3A Composites GmbH), can also be used in the form of composite panels of the ALUCOBOND ^® plus or ALUCOBOND ^® A2 with mineral core or ALUCORE ^® with aluminum honeycomb core, or comparable aluminum composite panels come. In principle, the core material is not limited to plastics or other specific materials, and in particular, core materials may also be used on a mineral basis, optionally with polymer binder, or on a metallic basis, eg. B. aluminum honeycomb structures.

To be particularly advantageous, it has proved in this case if the support plate, in particular the DIBOND ^® -Verbundplatte, a total of 6 mm thick, and preferably the upper outer layer and / or the lower outer layer may be 0.3 mm thick. However, the invention is not limited to specific plate thicknesses.

Another development of the illumination device according to the invention provides that the connection means comprise at least one plug part and electrical connection cable, wherein the connection cable connect the plug part with the light source. About the plug part is a particularly easy to create, detachable connection with the already mentioned electrical StronWSpannungsversorgung produced.

Yet another development of the lighting device according to the invention provides that the outer contour of the carrier plate to the inner contour of a Luminaire is adapted, in which the lighting device is used. In particular, when using said DIBOND ^® composite plate good machinability of the support plate in the outer contour region is given, so that the lighting device to virtually any Leuchtenformen- and dimensions is customizable.

In the course of yet another development of the invention, it can be provided that the LED illuminant has a power consumption of 10 to 50 W, preferably 20 to 40 W and most preferably 30 W. If, for example, a conventional 100 W light source is replaced by LED light bulbs with a power consumption of 30 W, the energy saving of about 70% mentioned at the outset results, with the LED light bulbs generally also having a significantly longer service life than conventional light bulbs. However, the invention is not limited to specific power values for the LED lamps.

Preferably, the proposed lighting device comprises a plurality of LED bulbs, for example, two to three LED bulbs, each with 10 W power consumption. These can be arranged distributed on the support plate, resulting in a desired Lichtabstrahlgeometrie. In addition, the said LED lighting means can be switched separately, so that the luminosity can be adapted in particular time-dependent.

The individual LED lighting means may each comprise a plurality of individual LEDs or LED elements, which may furthermore be arranged flat (plate-shaped) in the manner of a matrix. However, the invention is not limited thereto and basically includes all types of LED lamps.

In the course of another development of the lighting device according to the invention can be provided that the connection means comprise at least one power supply, which is preferably connected between the plug part and the lighting means. So that no moisture or the like can accumulate below the power supply, the power supply is preferably arranged at a distance from the carrier plate. The LED illuminant used according to the invention can in principle be designed as a DC or AC LED illuminant, but the use of a DC LED illuminant is preferred.

All arranged on the support plate functional units, that is, in particular the LED bulbs and / or the electrical connection / connecting means can be glued (heat-conducting) on the support plate or releasably secured thereto, preferably screwed. Breakthroughs may be provided by the carrier plate for the screw connection, so that the screw connection is secured by nuts or the like. Alternatively, screws with a cutting thread (metal screws) can be screwed directly into the carrier plate, if necessary after appropriate predrilling.

Further features and advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the drawing.

Figure 1 shows an embodiment of the lighting device according to the invention in plan view;

Figure 2 shows the lighting device according to Figure 1 in the bottom view; and

FIG. 3 shows the lighting device according to FIGS. 1 and 2 in FIG

Section along the line A-B in Figure 2.

A lighting device according to the invention is designated in FIGS. 1 to 3 in its entirety by the reference numeral 1. It is particularly suitable for retrofitting existing lighting equipment, in particular for the illumination of public spaces, such as streets, squares, stops, walkways or cycle paths, and is adapted or adapted accordingly to the geometry or the dimensions of such existing lighting devices. It is therefore natural for a person skilled in the art that the illumination device 1 illustrated and described below by way of example represents only one specific exemplary embodiment without being limited to such a configuration and shaping. The lighting device 1, which can also be referred to as a light fixture conversion plate, according to the embodiment in FIG. 1 comprises two LED lighting means 2, 3 in the form of a planar arrangement of light-emitting diodes. Furthermore, the lighting device comprises electrical connection means in the form of (connecting) cables 4 for connecting the LED lighting means 2, 3 with an electric power supply Stron, which will be discussed in more detail with reference to Figures 2 and 3. The LED bulbs 2, 3 are arranged on a support plate 5 and heat conductively connected thereto, for example by means of a suitable adhesive. The terminals 6 of the LED lamps 2, 3 are electrically connected to the connection cables 4, the latter being guided through holes 7 on the back of the support plate 5, which will be discussed in more detail below. Reference numeral 8 designates fastening means (screw means) for fixing elements arranged on the rear side of the carrier plate 5 (see Figure 2), which will also be discussed in greater detail below. All screw 8 are made of stainless steel V2A.

The support plate 5 has an outer contour 9, which is adapted to an inner contour of the lighting device (light) to be converted or converted, in the present case an approximately square outer contour. The LED lamps 2, 3 each include a plurality of individual LEDs (not shown), which are arranged flat in the manner of a matrix. The light-emitting angle of such an LED array is preferably about 140 °, so that no special storage / inclination of the LED bulbs 2, 3 on the support plate 5 is required regularly to achieve a satisfactory emission characteristics.

Figure 2 shows the back of the support plate 5 of Figure 1, wherein here, as in all figures, like reference numerals designate the same or equivalent elements. FIG. 2 again shows the bores 7 with the connecting cables 4 made. (It should be noted that the illustration according to FIG. 2 is rotated by 90 ° in a clockwise direction compared with the illustration in FIG. 1).

With reference to the elements mentioned in FIG. 1, FIG. 2 shows further connection means in the form of a power supply unit (transformer) 10, a plug part 11 and an electrical connection part in the form of a terminal block 12. The latter elements 10 to 12 are connected by means of the screw terminal. Tel 8 (see Figure 1) attached to the support plate 5. The plug part 1 1 is in the present case 3-pin, wherein the two phases N, L are electrically connected via further connecting cable 4 'with the power supply 10. The power supply unit 10 supplies the voltage required for operating the LED lighting means 2, 3 (see FIG. 1) via further connection cables 4 'and the luster terminal 12 as well as the already mentioned connection cables 4 to the LED lighting means 2, 3. The third pole PE of the plug part 1 1 is electrically connected via connecting cable 4 'to a ground terminal 13.

FIG. 3 shows the illumination device 1 according to FIGS. 1 and 2 in cross section along the line A-B in FIG. 2. FIG. 3 shows in particular the special configuration of the carrier plate 5, which is an aluminum composite plate. The support plate 5 has - without limitation - a plastic core 5a made of polyethylene (LDPE), on the top and bottom of each cover layer 5b, 5c made of aluminum or an aluminum alloy (AlMgl) is arranged. On the outside of the cover layers 5b, 5c, a lacquer layer, for example a stoving lacquer, and / or a protective foil, preferably of plastic, can furthermore still be arranged, which however is not explicitly shown in FIG.

Preferably at the carrier plate 5 to a commercially available DIBOND ^® -Verbundplatte, as sold by the company Alcan Singen GmbH. The thickness of the lower 5c and upper 5b cover layers in the embodiment shown is 0.3 mm, while the entire support plate 5 is preferably 6 mm thick. Such a support plate 5 gives the whole assembly a sufficient mechanical stability and ensures a sufficiently good workability, in particular in the region of the outer contour 9. It is also particularly, but without limitation, using the above DIBOND ^® - or ALUCOBOND ^® / ALUCORE ^® -Verbundplatte 5 no additional heat sink required to dissipate the generated during operation of the LED bulbs 2, 3 loss heat so that there is no thermal damage to the arrangement or the surrounding lighting device (not shown).

Finally, with reference numeral 14 nor a free space is explicitly marked, which is below the power supply 10 between the power supply 10 and carrier plate 5 or lower cover layer 5c is created. For this purpose, the power supply unit 10 is preferably arranged at a distance from the lower cover layer 5c of the carrier plate 5 by placing spacer elements 14a, for example washers or the like, in particular in order to avoid the accumulation of dirt and / or moisture in this region.

The entire arrangement or lighting device 1 is preferably used within a (existing) light, which is not explicitly shown in the drawing. About the plug part 1 1, it is connected in a simple manner with the there regularly existing electrical Strorr power supply and can replace in this way conventional bulbs. Since the LED lamps 2, 3 used regularly only have an electrical power consumption of approximately 10 W each, an energy saving in the range of 70% can easily be achieved by retooling conventional lamps.

By using the carrier plate 5 described in detail above, which is fitted with its outer contour 9 in the (existing) lamp body, no additional heat sinks are required, which makes the proposed lighting device 1 is particularly small, light and economical.

Claims

claims

1 . Lighting device (1), preferably for the illumination of public spaces, such as streets, squares, stops, pedestrian or cycle paths, comprising:

- At least one LED lighting means (2, 3), preferably in the form of a planar arrangement of light-emitting diodes;

- At least one electrical connection means (4, 4 ', 10, 1 1, 12) for connecting the LED lighting means (2, 3) with an electrical power supply; and

- At least one support plate (5) to which at least the LED illuminant is heat conductively attached;

characterized in that the carrier plate (5) is an aluminum composite plate comprising an upper cover layer (5b) and a lower cover layer (5c) of aluminum or an aluminum alloy, preferably AlMgl, and a core (5a), preferably of plastic and / or of a mineral material, most preferably with a polymer-based binder, and / or of a metallic material, most preferably with a honeycomb or the like, and that the LED lighting means (2, 3) with one of the cover layers (5b) in heat conductive Contact stands.

2. Lighting device (1) according to claim 1, characterized in that the carrier plate (5) on the outside of the upper cover layer (5b) and / or on the outside of the lower cover layer (5c) a lacquer layer, preferably polyester baked enamel, and / or a Protective film, preferably made of plastic.

3. Lighting device (1) according to claim 1 or 2, characterized in that the carrier plate (5) a DIBOND® composite plate, an xtrobond composite plate, an ALUCOBOND ^® composite plate an ALUCOBOND ^® plus composite plate, an ALUCOBOND ^® Is a ALUCORE -Verbundplatte ^® or a similar composite panel A2 composite panel.

4. Lighting device (1) according to at least one of claims 1 to 3, characterized in that the carrier plate (5) is 2 mm to 6 mm thick, wherein preferably the upper cover layer (5b) and / or the lower cover layer (5c) 0 , 2 mm to 0.3 mm thick.

5. Lighting device (1) according to at least one of claims 1 to 4, characterized in that the connection means comprise at least one plug part (1 1) and electrical connection cable (4, 4 '), wherein the connection cable (4, 4') the plug part (1 1) to the LED bulb (2, 3) connect.

6. Lighting device (1) according to at least one of claims 1 to 5, characterized in that an outer contour (9) of the carrier plate (5) is adapted to the inner contour of a lamp, in which the lighting device (1) is used.

7. Lighting device (1) according to at least one of claims 1 to 6, characterized in that the LED lighting means (2, 3) has a power consumption of 10 to 50 W, preferably 20 to 40 W, most preferably 30 W.

8. Lighting device (1) according to at least one of claims 1 to 7, characterized in that on the support plate (5) no additional heat sink is provided.

9. lighting device (1) according to at least one of claims 1 to 8, characterized in that the connection means comprise at least one power supply (1 0), which preferably between the plug part (1 1) and the LED lighting means (2, 3) is.

10. Lighting device (1) according to at least one of claims 1 to 9, characterized in that the power supply (10) spaced (14) from the support plate (5) is arranged.

1 1. Lighting device (1) according to at least one of claims 1 to 10, characterized in that the LED lighting means (2, 3) and / or the at least one connection means (4, 4 ', 10, 1 1, 12) on the carrier plate ( 5) is glued.

12. Lighting device (1) according to at least one of claims 1 to 1 1, characterized in that the LED lighting means (2, 3) and / or the at least one connection means (4, 4 ', 10, 1 1, 12) releasably on the support plate (5) is fixed, preferably screwed.