DE102010052020B4 - Lighting and / or display device - Google Patents

Abstract

Lighting and / or display device (10), comprising a holding body (20) for receiving at least one light-emitting diode element (50), wherein the holding body (20) is formed integrally and as a metal core board, wherein the holding body (20) as a receiving element for the at least one light-emitting diode element (50) is provided, wherein the holding body (20) is designed such that it can be brought into a defined shape or has a defined shape to at least one housing portion (12) of a housing of the lighting and / or display device ( 10), wherein the holding body (20) a plurality of predetermined bending and / or predetermined bending points (22), in the form of Tiefenfräsungen (22), which form bending and / or folding edges (21) or by means of which bending and / or Knucking edges (21) can be formed, wherein the holding body (20) by bending and / or buckling along the predetermined bending and / or predetermined bending points (22) can be brought into the defined shape, wherein de r holding body (20) has at least one hole area (23) designed as a cut-through for dissipating the heat generated by the at least one light-emitting diode element (50) to the surroundings, wherein the holding body (20) has a conductor pattern, such that the at least one light-emitting diode element ( 50) can be supplied with power.

Description

The invention relates to a lighting and / or display device.

The life of a light-emitting diode (LED) element depends directly on the temperature at the PN junction of the LED crystal. If the temperature at the PN junction exceeds a nominal temperature specified by the manufacturer, the service life of an LED drops drastically. As a temperature sink nowadays aluminum heat sinks are mostly used, which deliver the heat via convection and radiation to the environment. With passive cooling, ie without fans or circulating liquids, the rule of thumb for today's LEDs is that approx. 100 cm ² cooling area per watt LED power is required. Depending on the mounting position, restriction of the air circulation or even with poor heat transfer between the LED board and the heat sink, this value can still be many times greater. Very often, however, the use of a larger heat sink is undesirable or even impossible for design or commercial reasons.

The light sources, in particular the LEDs, are usually mounted on metal core boards as component carriers. To the board shape z. B. a housing or a heat sink, the boards can have defined kinks, so that they can bend into the desired shape. However, it is often difficult to accommodate the heatsink and metal core board in a corresponding housing.

DE 20 2009 001 475 U1 shows a heat sink for a lighting device.

DE 20 2008 008 181 U1 shows a support plate for luminous dots and a corresponding facade system.

DE 10 2008 036 487 A1 describes a light source and the use of the light source.

DE 10 2006 061 020 B3 shows an LED bulb and a lamp that includes the LED bulb.

It is therefore an object of the invention to provide a lighting and / or display device in which the heat generated by the LEDs during operation can be delivered to the environment in an efficient manner and yet a compact size of the arrangement is ensured while sufficient stability.

This object is achieved by a lighting and / or display device according to claim 1.

In particular, the object is achieved by a lighting and / or display device, comprising: a holding body for receiving at least one light emitting diode element, wherein the holding body is integrally formed and as a metal core board, wherein the holding body is provided as a receiving element for the at least one light emitting diode element wherein the holding body is formed such that it can be brought into a defined shape or has a defined shape to form at least one housing portion of a housing of the lighting and / or display device, wherein the holding body a plurality of predetermined bending and / or predetermined bending points, in shape von Tiefenfräsungen, which form bending and / or folding edges or by means of which bending and / or folding edges are formed, wherein the holding body can be brought into the defined shape by bending and / or buckling along the predetermined bending and / or predetermined bending points, wherein the holding body min at least one formed as a cutout hole area for deriving the heat generated by the at least one light emitting diode element to the environment, wherein the holding body has a conductor pattern, so that the at least one light emitting diode element can be supplied with power.

An essential point of the invention is that now the holding body as a receiving element, so as a support for the light-emitting diode or the elements is available, wherein the holding body simultaneously acts as a heat sink and optimizes the heat dissipation. Moreover, since the holding body at least partially forms the housing or a housing section of the arrangement, that is to say the lighting and / or display device (or can be formed at least in sections as a housing), the number of components for the arrangement with one or more light sources can be significantly reduced. The holding body is provided as a supporting component.

Thus, a housing construction for the one or more lamps is provided, without complex assembly of boards, heat sinks and housing elements with the associated disadvantages, such as high production costs and poor heat transfer values at the contact points of the lamp carrier and heat sink.

The holding body is preferably made of a thermally conductive material, in particular of a metal, so that heat generated by the light-emitting diode element can be dissipated via the holding body to the environment. The holding body thus absorbs the heat of the light source or the bulbs and directs them to the environment further. For this purpose, the holding body to a material which has a corresponding, ie suitable thermal conductivity. Preferably, a metal core board is provided for this purpose.

In an advantageous embodiment, the holding body can form the entire housing for the lighting and / or display device or essentially determines the outer shape of the arrangement.

The deep cuts remove the metal core down to a few 1/10 millimeters, allowing for easy bending and / or buckling at the desired positions, d. h., the deep milling forms a milling path along which a defined bending or buckling is made possible.

Preferably, the bending and / or bending edges are formed as edges of the housing portion or the housing.

In a preferred embodiment, the holding body is designed as a particularly rectangular metal core plate, with at least 2, preferably with 3, 4 or 5 predetermined bending and / or predetermined buckling points and more preferably with 6 predetermined bending and / or predetermined bending points, so that the holding body to a tubular element is bendable and / or bendable with a polygonal cross-section, in particular to a tubular element with a hexagonal cross-section and 6 bending and / or folding edges. Other forms are conceivable, such. B. embodiments with semicircular cross-section.

Due to the special shape of a polygon, the Matellkernplatine receives increased stability, so that it (at least partially) can be used as a structural component and just as a housing.

In addition, the holding body is at the same time designed as a heat sink, since it can absorb the generated heat directly through the solder contacts of the one or more bulbs and can deliver unhindered to the environment.

The hole area is formed as a cut-through, which preferably runs along a bending and / or bent edge.

By the defined milling of deep milling for kinks and by the defined milling of Durchfräsungen or by providing other hole areas, such. B. holes to allow improved convection and thus dissipation of the heat produced by the light emitting diodes, a metal core board in addition to the electrical connection of the components can simultaneously perform the function of a heat sink and supporting housing component. On the use of a separate heat sink, which usually has to be connected to the metal core board, can be dispensed with.

A preferred embodiment provides that the holding body has at least one receiving area for the light-emitting diode element. Thus, the light source, so the light-emitting element (or the LED elements) on the holding body, ie, for. B. on the metal core board to be soldered.

Advantageously, the holding body is designed such that a multiplicity of light-emitting diode elements can be accommodated thereon.

The holding body is formed in the lighting and / or display device as at least one housing portion of the lighting and / or display device, as described above, for. B. as a tubular polygon. The holding body thus at least partially determines the outer shape of the lighting and / or display device. That is, the shaped holding body determines, at least in part, what the lighting and / or display device looks like.

The lighting and / or display device further comprises at least one light emitting diode element, preferably a plurality of light emitting diode elements. Thus, a lighting device can be realized or the device is used as a display device for displaying various information.

An embodiment provides that the holding body is formed as a tubular element with a polygonal cross-section. Thus, a high stability of the lighting and / or display device is ensured, at the same time, the holding body is integrally formed, so that the power supply of the lighting means can be optimized. In principle, two contacts are enough for the power connection.

Preferably, a base element is provided which is suitable both for fastening the holding body in, for example, a lamp (in the manner of a light bulb) and for supplying the electrical energy via a standard socket (for example E27, 40, etc.) or non-standardized socket. The base element is preferably arranged at an open end of the shaped holding body (eg tubular polygon) and thus serves as a bottom element and also as part of the housing. In an advantageous embodiment, the base element is designed such that the holding body can be connected to the base element, in particular in the socket element can be inserted and / or glued and / or screwed with this. Other types of connection are conceivable, for. B. soldering etc.

It may further be provided a cover member which is arranged at a further open end of the shaped holding body, d. H. at the end opposite the base element. Also, the lid member may be connected to the holding body in any way, for. B. by plugging and / or gluing, and may also be provided as part of the housing. It serves to stabilize the holding body and / or as protection against contact of electronic circuits within the holding body (in particular protection against contact).

If the holding body is provided as a tubular element, the base element and cover element are arranged at the opposite ends, the base element z. B. at a first end, the lid member at a second end of the holding body, so that a substantially closed housing of the lighting and / or display device is provided.

Further embodiments of the invention will become apparent from the dependent claims.

The invention will be described with reference to embodiments, which are explained in more detail with reference to the figures. Hereby show:

1 a holding body according to the invention in a preferred embodiment;

2 a lighting and / or display device according to the invention in a preferred embodiment with the holding body according to 1 ,

In the following description, the same reference numerals are used for the same and like parts.

1 shows a schematic representation of a holding body according to the invention 20 in a preferred embodiment, as a housing 11 or housing section 12 for a lighting and / or display device 10 (please refer 2 ) is provided. Shown is a polygon shaped metal core board to which a plurality of light emitting diode elements 50 attached, soldered here. The metal core board has for this purpose each a receiving area 26 for each bulb. The bulbs 50 For example, power is supplied via a line pattern (eg, conductive copper traces, not shown) applied to the metal core board.

The metal core board 20 is already shown here in the finished molded state. To the board 20 in this form of a polygon - here hexagon or tubular body or tubular member or hollow body with hexagonal cross-section - to bring, the board has predetermined bending and / or predetermined bending point, z. B. deep milling 22 or milling tracks, which remove the metal core, so that defines bending and / or folding edges 21 be trained. Along these cutting paths can be the metal core board 20 So bend or bend accordingly, so that the desired shape can be produced. Since the holding body is already shown in its final form, the Tiefenfräsung or the Tiefenfräsungen is no longer visible.

The board 20 So here is as a tubular element with a hexagonal cross-section and six bending and / or bent edges 21 formed and has a first end 24 and a second end 25 on.

Along the milling tracks 22 or the bending and / or folding edges 21 are hole areas 23 provided as Durchfräsungen or "ventilation slots". Thus, each milling path can have one (or even more stepped) cut-through (s) 23 have, or these are provided in certain other places. Additional hole areas, z. B. holes, may also be provided.

The metal core board shaped into a polygon 20 So can as a supporting component of a lighting and / or display device 10 be provided because the tubular configuration ensures a sufficiently high stability of the arrangement without having to provide further stabilizing or shaping components.

During operation of the arrangement (see 2 ) heat the LED elements 50 and give their heat to the metal core board 20 from. Because there are no thermally poorly conductive junctions to any heat sinks, the metal core board heats up 20 evenly. The dissipation of heat inside the polygon is due to the Durchfräsungen 23 allowed via convection.

2 shows an example of a mounted lighting and / or display device 10 with the shaped board 20 out 1 , The board 20 becomes after molding to a polygon only in a molded groove in a base element 30 stuck and z. B. fixed by means of screws or adhesive. The fact that the individual sides of the hexagon are electrically connected (the deep milling at the kinks affects only the metal substrate of the board, the conductive copper tracks are unaffected), the electrical power supply can be initiated centrally via only two contacts. An individual power supply for each individual side or a connection via cable or plug connector is eliminated.

The base element 30 is at the first end 24 the tubular shaped board 20 provided while a lid member 40 at the second end 25 is appropriate. The stability of the arrangement is achieved by the base element 30 and the lid member 40 further increased. holding body 20 , Base element 30 and cover element 40 form the case here 11 the lighting and / or display device 10 , the holding body 20 at least the housing section 12 ,

The base element shown here, for example, is still provided with a thread, so that it can be accommodated in a corresponding version of a lamp.

With the holding body according to the invention 20 and the lighting and / or display device according to the invention 10 an arrangement is provided which can be used as a display instrument or as a lighting device to z. As conventional incandescent (Edison bulb), mercury vapor, sodium or other known technologies to replace. The holding body 20 , usually a metal core board, which in any case for the power supply of the bulbs 50 is necessary, can be brought into a desired shape, so that a housing construction is provided as a supporting member. The board 20 serves at the same time the power supply of the bulbs 50 , as a carrier for the bulbs 50 , at least partially as a housing of the lighting and / or display device 10 and as a heat sink. Other components that would make it difficult to dissipate the heat generated by the bulbs, are not required. Thus, the arrangement is inexpensive, since many components or components (explicit housing, explicit heatsink) can be dispensed with.

LIST OF REFERENCE NUMBERS

10

Lighting and / or display device

11

casing

12

housing section

20

Holding body, metal core board

21

Bending and / or bending edge

22

Target bending and / or predetermined bending point, deep milling

23

Hole area, cut through

24

First end

25

Second end

26

reception area

30

base element

40

cover element

50

Light source, light-emitting diode element

Claims (14)

Lighting and / or display device ( 10 ), comprising a holding body ( 20 ) for receiving at least one light-emitting diode element ( 50 ), wherein the holding body ( 20 ) is formed integrally and as a metal core board, wherein the holding body ( 20 ) as a receiving element for the at least one light-emitting diode element ( 50 ) is provided, wherein the holding body ( 20 ) is designed such that it can be brought into a defined shape or has a defined shape to at least one housing portion ( 12 ) of a housing of the lighting and / or display device ( 10 ), wherein the holding body ( 20 ) a plurality of predetermined bending and / or predetermined bending points ( 22 ), in the form of deep cuts ( 22 ), which bending and / or kink edges ( 21 ) or by means of which bending and / or folding edges ( 21 ) are formed, wherein the holding body ( 20 ) by bending and / or buckling along the predetermined bending and / or predetermined bending points ( 22 ) can be brought into the defined shape, wherein the holding body ( 20 ) at least one formed as a cut-through hole area ( 23 ) for deriving the from the at least one light emitting diode element ( 50 ) has generated heat to the environment, wherein the holding body ( 20 ) has a conductor pattern, so that the at least one light-emitting diode element ( 50 ) is supplied with power. Lighting and / or display device ( 10 ) according to claim 1, characterized in that the holding body ( 20 ) is formed of a thermally conductive material, in particular of a metal, so that one of the light emitting diode element ( 50 ) generated heat via the holding body ( 20 ) is derivable to the environment. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the holding body ( 20 ) substantially the entire housing for the lighting and / or display device ( 10 ) trains. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the bending and / or folding edges ( 21 ) are formed as edges of the housing portion or housing. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the holding body ( 20 ) As in particular rectangular metal core board, with at least 2, preferably with 3, 4 or 5 Predetermined bending and / or predetermined bending points ( 22 ) and in particular preferably with 6 predetermined bending and / or predetermined bending points ( 22 ) is formed, so that the holding body ( 20 ) to a tubular element with a polygonal cross-section, in particular to a tubular element with a hexagonal cross section and 6 bending and / or bent edges ( 21 ) is bendable or bendable. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the holding body is designed as a heat sink. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the cut-through along a bending and / or bending edge ( 21 ) runs. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the holding body ( 20 ) at least one receiving area ( 26 ) for the light-emitting diode element ( 50 ) having. Lighting and / or display device ( 10 ) according to one of the preceding claims, characterized in that the holding body ( 20 ) is formed such that a plurality of light emitting diode elements ( 50 ) is receivable on this. Lighting and / or display device according to one of the preceding claims, characterized in that the holding body ( 20 ) is formed as a tubular member having a polygonal cross-section. Lighting and / or display device according to one of the preceding claims, characterized in that it further comprises a base element ( 30 ) for mounting in a luminaire and / or for supplying electrical energy. Lighting and / or display device according to claim 11, characterized in that the base element ( 30 ) is formed such that the holding body ( 20 ) with the base element ( 30 ), in particular in this pluggable and / or can be glued and / or screwed with this. Lighting and / or display device according to one of the preceding claims, characterized in that it further comprises a cover element ( 40 ) for stabilizing the holding body and / or as protection against contact of electronic circuits within the holding body. Lighting and / or display device according to one of claims 11 to 13, characterized in that the base element ( 30 ) at a first end ( 24 ) of the tubular element is arranged and the cover element ( 40 ) at a second end ( 25 ), which is the first end ( 24 ) is opposite, so that a substantially closed housing of the lighting and / or display device is provided.

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