DE102011051034A1 - LED lighting arrangement e.g. suspended lamp, for use at ceiling of building, has carrier comprising support profile having geometry on side of carrier as support profile on another side of carrier, where carrier is mounted at housing - Google Patents

Abstract

The arrangement i.e. ceiling lamp (10), has a housing (12) comprising a light exit opening, and LEDs formed as lighting units. A carrier (14) is arranged in the housing with a support to mount the LEDs. The carrier comprises a support profile having geometry on side of the carrier as the profile on another side of the carrier. The carrier is mounted at the housing with two sides of the opening. The housing is elongated, where the housing and the carrier include an invariable cross-section over length of the carrier. The LEDs are arranged in a series along longitudinal direction of the housing.

Description

Technical area

• (a) ein Gehäuse mit zumindest einer Lichtaustrittsöffnung;
• (b) eine Mehrzahl von LEDs als Leuchtmittel;
• (c) einen in das Gehäuse einsetzbaren Träger mit einer Aufnahme zur Montage der LEDs.

The invention relates to a lighting arrangement comprising:

• (A) a housing having at least one light exit opening;
• (b) a plurality of LEDs as lighting means;
• (C) an insertable into the housing carrier with a receptacle for mounting the LEDs.

The use of light-emitting diodes (LED) leads to energy savings, for example in buildings to energy savings compared to conventional fluorescent tubes. There are therefore known lighting arrangements for interiors in which LEDs are used. The LEDs are mounted on a carrier. The carrier is mounted in a housing.

State of the art

WO 2009/000536 A1 discloses an elongated luminaire having a plurality of LEDs arranged in a row on a circuit board. The LEDs radiate in the direction of a reflector and are reflected by the reflector in the direction of a light exit area. On the circuit board, a heat sink is provided, which also extends over the length of the lamp. The LEDs are firmly mounted on the printed circuit board, also referred to as a printed circuit board. The lamp formed by the LEDs is not dismountable as a lamp unit and has no parts to be changed in the interior.

DE 20 2010 002 018 U1 discloses an LED assembly as a replacement for conventional fluorescent tubes. The LEDs sit as an open light bar fixedly mounted on a support member which is rotatably mounted in a holder.

WO 2008/102287 A1 discloses a two-dimensional array of LEDs disposed on a translucent glass plate. The light of the LEDs is emitted in the direction of reflectors. From the reflectors, the light is emitted in the direction of the glass plate. It passes through the spaces between the LEDs.

WO 1997/036131 A1 discloses an array of LEDs whose light is radiated onto a reflector and from the reflector onto a microprism plate.

Disclosure of the invention

• (d) der Träger beidseitig ein Aufnahmeprofil aufweist, wobei das Aufnahmeprofil auf der einen Seite des Trägers eine andere Geometrie aufweist als das Aufnahmeprofil auf der anderen Seite des Trägers, und
• (e) der Träger im gleichen Gehäuse sowohl mit der einen, als auch mit der anderen Seite der Lichtaustrittsöffnung zugewandt montierbar ist.

It is an object of the invention to make the production of the illumination arrangement described above cheaper. According to the invention the object is achieved in that

• (D) the carrier has on both sides a receiving profile, wherein the receiving profile on one side of the carrier has a different geometry than the receiving profile on the other side of the carrier, and
• (E) the carrier in the same housing facing both the one, and with the other side of the light exit opening can be mounted.

Such a carrier allows the same housing and components to be used for different illumination geometries. Fewer tools and less different manufacturing steps are required. The costs for the production, the training effort during assembly and the storage of such a lighting arrangement are therefore lower without sacrificing the same diversity of the offer.

It is preferably provided that the housing is elongated and the housing and the carrier have a substantially invariable cross-section over the length. As a result, the individual components can be produced as profiled goods and in particular pulled or extruded. This also simplifies the production.

In one embodiment of the invention, means are provided for blinding the light emerging from the light exit opening. These de-masking means may comprise a micro-prism plate, another microstructure plate, a satin-finished plate or other deblading plate which is optionally insertable with a holder into the housing. LEDs are comparatively small and have a very high luminance. As a result, there is a danger that one is dazzled upon direct inspection of the lamp. The means serve to dazzle and cause a uniform illumination profile.

A particularly uniform illumination is achieved when the LEDs are arranged in rows in the longitudinal direction of the housing. In particular, a different number of rows can be provided on the two sides of the carrier. Preferably, a row is provided on one and two rows on the other side of the carrier. Depending on which side is aligned with the light exit opening, the luminaire emits one or two rows of LEDs.

In a particularly advantageous embodiment of the invention, the carrier forms a heat sink for dissipating the heat generated by the LEDs. For this purpose, the carrier is made of a suitable material, which has a high conductivity and a geometry over which the resulting heat can be well dissipated to the environment. In particular, the heat sink may have cooling ribs in the longitudinal direction of the housing. The cooling fins preferably extend parallel to the LED rows in the longitudinal direction of the carrier.

In a further embodiment of the invention, the LEDs are arranged on a common board, which can be inserted into a rail in the carrier. It is understood that a plurality of boards may be provided for each of a plurality of LEDs, which are inserted into the rail. To mount the boards are then simply inserted into the rail and fastened there.

A further embodiment of the invention provides that two opposing light exit openings are provided so that light from LEDs on one side of the support can pass through the second light exit opening through a first light exit opening and light from LEDs on the other side of the support. For example, a light exit opening may be directed downwards. Through this light exit opening, light emerges for direct illumination. Light generated by LEDs on the opposite side of the carrier emerges upwards. This creates a proportion with indirect lighting. The light can also be deflected by suitable reflectors or other optical means down.

Embodiments of the invention are the subject of the dependent claims. An embodiment is explained below with reference to the accompanying drawings.

Brief description of the drawings

1 Figure 3 is an exploded perspective view of an elongated luminaire with a rotatable support for LEDs and a micro prism insert.

2 is a cross section through the composite lamp 1 in a first assembly variant.

3 is a cross section through the composite lamp 1 in a second installation variant.

4 illustrates the radiation direction of the luminaire 1 in the in 2 illustrated mounting variant with a laterally arranged LED row.

5 illustrates the radiation direction of the luminaire 1 in the in 3 illustrated installation variant with two LED rows.

6 illustrates the radiation direction of the luminaire 1 in the in 3 illustrated mounting variant with an LED row.

7 illustrates the radiation direction of the luminaire 1 in the in 3 illustrated mounting variant, with two rows of LEDs down for direct lighting and a row of LEDs upwards for indirect lighting are provided.

8th corresponds to the illustration in 6 , wherein additionally a further LED row is provided upwards for indirect lighting.

Description of the embodiment

1 is an exploded view of an elongated interior light, commonly with 10 is designated. The interior light can be designed as a pendant light. Alternatively, the interior light is mounted on the ceiling, integrated into the ceiling or attached to a wall as a wall lamp. The interior light can be used together with other, similar lights in the form of light strips or other structures.

The lamp 10 has a housing 12 on. Above the carrier 14 is a driver use 16 intended. The housing 12 is open at the bottom and forms there a light exit opening. The light exit opening is with a plate holder 18 closed, in which a micro prism plate 20 is inserted and at the top a carrier 14 is inserted.

casing 12 , Carrier 14 and plate holder 18 have a cross section that is substantially the same length as the luminaire. As a result, these can be produced in virtually any length. The length can be well adapted to the particular needs of the application. The lamp 10 will be at their ends 24 and 26 finished with caps (not shown). The housing 12 consists in the present embodiment of a profiled aluminum U-piece. Depending on the environment and design, it can also be made of stainless steel or another durable material.

The carrier 14 It is also made of aluminum and forms a heat sink. The material has good thermal conductivity and is resistant to environmental influences. Several cooling fins 28 extend along the carrier 14 over its entire length. This will increase the cooling performance of the wearer 14 elevated.

The plate holder 18 is made of plastic and has a transparent surface 30 on. In an alternative embodiment, not shown, the surface is 30 satin. On the long sides each two V-shaped legs extend, which on the top of the surface 30 converge. The outer thighs 32 are shorter than the inner two thighs 34 , The outer thighs are slightly above the surface 30 out. With the outer thighs 32 becomes the plate holder 18 in the case 12 locked. For this are profiles 36 and 38 on the inside of the case 12 intended. The plate holder 18 sits in the assembled state so in the case that the bottom of the transparent surface 30 flush with the profile 38 at the bottom of the case 12 adjacent and thus forms a substantially flat conclusion.

The longer thighs 34 of the plate holder 18 are inwardly inclined towards each other. They serve as a holder for the wearer 14 , For this purpose, the ends of the legs 34 provided with a substantially T-shaped profile, in which a corresponding profile of the carrier 14 intervenes. The thigh 32 and 34 are something about their longitudinal axis 40 , where they are merged, movable. The plate holder 18 as a whole and the carrier 14 can therefore be clipped into position and need not be inserted from the ends. This shortens the installation time.

Between the inner thighs 34 lies the microprism plate 20 on the surface 30 on. The micro prism plate 20 will be together with the plate holder 18 in the case 12 used. The plate holder 18 protects the micro prism plate 20 from damage and contamination during installation. It is understood that instead of a microprism plate any other plate can be used which achieves the desired optical effect. For example, another microstructure or a satin-finished plate can be used for the blinding. Also, the area can be 30 directly provided with a suitable coating, etched or machined, so that glare without additional plate 20 he follows.

The inwardly facing surfaces of the legs 34 are reflective, for example, by vapor deposition with aluminum, applying a reflective film or, as shown here, by inserting a reflective disk 42 , Radiation from the interior of the lamp is through the reflectors thus formed down through the light exit opening 44 of the housing 12 reflected to the outside. This is in 2 good to see.

In the middle area between the top and the light exit opening 44 The housing forms two arms 46 and 48 extending over the length of the case 12 extend. The slightly bevelled, substantially vertical arms 46 and 48 are bent inward at the free end, leaving horizontal ends 50 are formed. The driver insert 16 is with brackets 52 between these arms 46 and 48 held. This will be curved clip ends 54 over protrusions 56 on the arms 46 and 48 clipped. The driver insert 16 is essentially a sheet which is bent upwards at the ends. On this sheet are drivers 22 installed, which are required for the control and power supply of the LEDs described below.

The carrier 28 is a substantially flat structure. The cooling fins 28 jump on the in 2 down side. Between the cooling fins 28 is a rail 60 educated. The profiles along the long side of the carrier 14 , right and left in 2 and 3 , are so far symmetrically formed, as the carrier 14 both with the single rail 60 down - as in 2 represented - as well as upwards - as in 3 shown at the T-shaped ends of the legs 34 can be used. This allows the factory to decide during assembly whether the single rail 60 should be arranged below or above. On the side, which is the side with the single rail 60 are two identical or comparable, parallel rails 68 and 70 intended. In 2 are the rails 68 and 70 arranged above. In 3 are the rails 68 and 70 arranged below.

Into the rails 60 . 68 and 70 can boards 72 be inserted with LED rows. The LED rows extend in the longitudinal direction of the entire arrangement on the boards. The boards 72 and so the LEDs will be with the drivers 22 contacted. Between the boards 72 and the carrier 14 At least during operation there is a good heat-conducting contact. 4 is a detailed representation of the situation in 2 , There shows the single rail 60 downward. Only in this rail 60 is a circuit board 72 inserted. arrow 74 illustrates the emission direction of the LEDs. LEDs are bulbs with a directional radiation characteristic in the range up to 180 degrees. It can be seen that in this arrangement, the substantial part of the radiation directly down through the light exit opening with the transparent surface 30 arrives. Lateral portions of the radiated light are transmitted through the reflectors 42 also steered down.

The arrangement allows using the same components different configurations, which in the 4 to 8th are shown schematically.

5 shows the situation in which the carrier is rotated by 180 ° 4 in the plate holder 18 is used. The single rail 60 is now up and empty. In the two rails 68 and 70 on the opposite side of the carrier 14 are boards 76 and 78 inserted and contacted with one LED row. The LEDs now emit two rows. This is through arrows 80 and 82 represents. The emission direction can take place at an angle, as in 5 is indicated. The use of two LED rows allows an increase in the luminance of the luminaire. If only one row is used, the emission direction can be through reflectors 42 be specifically influenced. Is in 6 illustrated.

The use of a carrier, which can accommodate one or more boards on both sides, also allows new optical concepts. These are in 7 and 8th illustrated. In the embodiment according to 7 are, much like in 5 , both boards in both down-facing rails 68 and 70 intended. The LED rows provided on it cause direct illumination. This is by arrows 80 and 82 represents. In this embodiment, but also the single rail 60 on the opposite, upper side of the carrier 14 with a circuit board 86 busy. The on the board 86 arranged LED row radiates upwards. This is by an arrow 88 represents. Depending on the application, the housing 12 for example, a pendulum or wall lamp at the top with a further, additional light exit opening provided. Then the ceiling of the illuminated room is also illuminated. Alternatively, a reflector arrangement may be provided (not shown) with which the light is directed laterally through lateral light exit openings or downwards to the outside.

8th illustrates an arrangement similar to 6 with an asymmetrical light distribution, which radiates additionally upwards. This is by an arrow 90 illustrated. This arrangement and the arrangement in 6 are particularly suitable when used as a wall light.

The invention has been described above with reference to some concrete exemplary embodiments. However, the invention is not limited to these embodiments. A person skilled in the art will be familiar with a wide variety of possible variations, which result from the description and which likewise fall within the scope of protection, which is to be limited exclusively by the appended claims. It is understood that in more complex carrier designs, other geometries, such as alternating arrangements of LEDs within the two rows, three or more rows for wider lights or denser and more LED groupings within the geometries on the boards are conceivable without departing from the spirit , Also, the carrier can assume other geometries, such as cuboid, provided that it is still suitable as a heat sink and for receiving the boards. Finally, the boards can take over cooling functions and / or an external cooling can be provided. Also, the components of the lamp can be fastened together in a variety of ways, in particular, but not limited to sticking, tense, screw, clamp and much more.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2009/000536 A1 [0003]
• DE 202010002018 U1 [0004]
• WO 2008/102287 A1 [0005]
• WO 1997/036131 A1 [0006]

Claims (10)

Lighting arrangement ( 10 ), comprising: (a) a housing ( 12 ) with at least one light exit opening ( 44 ); (b) a plurality of LEDs as lighting means; (c) one in the housing ( 12 ) ( 14 ) with a receptacle for mounting the LEDs; characterized in that (d) the carrier ( 14 ) a receiving profile on both sides ( 60 . 68 . 70 ), wherein the receiving profile on one side of the carrier has a different geometry than the receiving profile on the other side of the carrier, and (e) the carrier ( 14 ) in the same housing ( 12 ) with one, as well as with the other side of the light exit opening ( 44 ) facing is mountable. Lighting arrangement ( 10 ) according to claim 1, characterized in that the housing ( 12 ) is elongated and the housing ( 12 ) and the carrier ( 14 ) have a substantially invariable cross-section over the length. Lighting arrangement according to claim 1 or 2, characterized in that means ( 20 ) for fading out of the light exit opening ( 44 ) Exiting light are provided. Lighting arrangement according to claim 3, characterized in that the means for deblading a microprism plate ( 20 ), a different microstructure plate, a satined plate or other deblading plate, optionally with a holder ( 18 ) in the housing ( 12 ) can be used. Lighting arrangement according to one of the preceding claims, characterized in that the LEDs in rows in the longitudinal direction of the housing ( 12 ) are arranged. Lighting arrangement according to claim 5, characterized in that a different number of LED rows on the two sides of the carrier ( 14 ), in particular a row on the one and two rows are provided on the other side of the carrier. Lighting arrangement according to one of the preceding claims, characterized in that the carrier ( 14 ) forms a heat sink for dissipating the heat generated by the LEDs. Lighting arrangement according to claim 7, characterized in that the heat sink cooling fins ( 28 ) in the longitudinal direction of the housing ( 12 ) having. Lighting arrangement according to one of the preceding claims, characterized in that the LEDs on a common board ( 72 . 76 . 78 ) arranged in a rail ( 60 . 68 . 70 ) in the carrier ( 14 ) can be inserted. Lighting arrangement according to one of the preceding claims, characterized in that two opposite light exit openings are provided, so that light ( 74 . 80 . 82 . 84 ) of LEDs on one side of the carrier ( 14 ) through a first light exit opening ( 44 ) and light ( 88 . 90 ) of LEDs on the other side of the carrier ( 14 ) can pass through the second light exit opening.

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