WO2008148423A1

WO2008148423A1 - Reflector for a lamp

Info

Publication number: WO2008148423A1
Application number: PCT/EP2007/055533
Authority: WO
Inventors: Stefan Otzen
Original assignee: Osram Gesellschaft mit beschränkter Haftung
Priority date: 2007-06-05
Filing date: 2007-06-05
Publication date: 2008-12-11

Abstract

The invention relates to a reflector for a lamp, having at least one exterior element (10) comprising a light exit opening (12), and at least one interior element (14) disposed within the exterior element (10), by means of which a beam path (16) from at least one light emitting diode (LED 18) can be deflected about an angle (), wherein the at least one exterior element (10) comprises a fastening device (20) by means of which the at least one LED (18) can be held on the exterior element (10).

Description

description

Reflector for a lamp

Technical area

The invention relates to a reflector for a lamp specified in the preamble of claim 1. Art.

State of the art

For example, such a reflector can already be seen from DE 201 11 322 U1 as known and comprises an outer element designed as a holder with a light exit opening. Within the outer element, an inner element is arranged, which is designed as a holder ^¬ direction for one or more light-emitting diodes (LEDs). Furthermore, it is provided that the inner element is partially formed as a reflector in order to divert the beam paths of the LEDs by a predetermined angle can. The reflector can also be used to base an associated low-voltage lamp in a lamp socket.

A disadvantage of the known reflector while the circumstance is considered, that the reflector has a comparatively poor heat ^¬ exhaustion during operation of an associated lamp.

Presentation of the invention

Object of the present invention is therefore to provide a reflector of the type mentioned, which allows improved heat dissipation. The object is achieved by a reflector for a lamp with the features of claim 1. Advantageous embodiments with expedient and non-trivial developments of the invention are specified in the subclaims.

A reflector, which allows improved heat dissipation, according to the invention is created by the fact that the at least one outer element comprises a Halterungseinrich ^¬ device, by means of which the at least one LED on the outer element is durable. In other words, in contrast to the prior art, the reflector according to the invention makes it possible to hold the at least one LED on the outer element, which, due to the simplified air convection compared to the inner element, ensures a correspondingly improved heat dissipation. Furthermore, such outer elements can usually be formed with a larger surface than the inner elements arranged in them, whereby the removal of the entste ^¬ rising heat energy is further improved. Therefore, it is possible, the reflector of the invention or its associated lamp problems even in areas shoring ^¬ s, in which excessive heating should be avoided. At the same time ei ^¬ ne excessive heating of the reflector itself is of course prevented in this way.

In an advantageous embodiment of the invention it is provided that the holding device is designed such that the beam path of the at least one LED is at least indirectly steerable through the light exit opening. Such a trained Halterseinrich- tion thus allows an optimization of the luminous efficacy of the lamp associated with the reflector. It can be provided be that the support means is formed so that the beam path of an LED held by it is directed directly through the light exit opening. Alternatively or additionally, it can also be provided that the mounting device is designed such that the beam path of an LED held by it is first directed to the inner element and from this further through the light ^{¬ outlet} opening.

In this case, it has proven to be advantageous that the holding device comprises at least one mounting opening, within which the at least one LED for holding at least in sections can be arranged and / or fixed. A mounting opening is a structurally cost-effective and variably adaptable to the particular circumstances means to hold the at least one LED by means of the support means on the outer element or set. The mounting opening can be formed, for example, continuously through the outer element, so that the at least one LED from an outer side of the outer ßenelements at least partially pushed through the mounting ^¬ opening and can be set in the desired position. The mounting opening also allows a particularly simple alignment of the beam path to ^¬ least one LED and thus the resulting Lichtab- radiation of the associated lamp.

In a preferred manner, the mounting device comprises a plurality of mounting openings for holding a plurality of LEDs. As a result, with complete utilization of the surface of the outer element, a significantly higher number of LEDs can be installed in comparison to the prior art, which results in a particularly high light output a lamp associated with the reflector is ensured. Of course, the person skilled in the art is aware that the improved heat dissipation of the reflector in this ^{embodiment is} particularly significant.

In an advantageous embodiment of the invention it is provided that the outer element and / or the Innenele ^¬ ment are at least partially rotationally symmetrical ^¬ formed. On the one hand, this enables optimized heat dissipation; on the other hand, a specific adjustment of the desired light emission characteristic of the reflector can be made as a function of the specific geometric configuration of the outer and / or inner element.

It has proved advantageous that the Au ßenelement and / or inner member are at least from ^¬ sectionally conical. An at least partially rotationally conical or rotationally frustoconical design permits a particularly simple bundling of the individual beam paths into a light beam and thus a directed light emission characteristic of the reflector, in particular in combination with a plurality of LEDs.

The directed light emission characteristic with collimated light beams can advantageously be achieved by the angle and an opening angle of the inner element together amounting to 180 °. It has been found to be structurally advantageous that the angle between 45 ° and 135 ° and the opening angle corresponding to between 135 ° and 45 °. In principle, however, any other combination between angle and opening be provided angle, which together 180 ° ^¬ carries. The term opening angle here refers to twice the included between the generatrices and the axis of rotation of the inner member angle.

In a further advantageous embodiment of the invention, a plurality of outer elements and / or inner elements is provided. A combination of several exterior and / or interior elements makes it possible to design lamps with a particularly high light output, a complex Lichtab- beam characteristic or a combination of both properties.

The formation of lamps with a particularly high light output is advantageously made possible by the fact that the plurality of outer elements and / or Innenele- elements along an optical axis of the reflector are arranged. Thus, a reflector with mög ^¬ lichst little construction space is made possible which is capable of holding a large number of LEDs and combining the beam paths to a particularly intense beam path.

Preferably, the reflector is at least one LED zugeord ^¬ net, which is held by means of the support means on the outer element. The LED can emit light while a ^¬ be arbitrary color. If several LEDs are assigned to the reflector, it can also be provided that they emit differently colored light in each case, as a result of which particularly variable light emission characteristics are made possible. Brief description of the drawings

Embodiments of the invention are explained below in more ^¬ hand drawings, in which like or functionally identical elements are provided with identical reference numerals. Show it:

1 is a perspective oblique view of a reflector ^¬ sector according to a first embodiment;

FIG. 2 shows a perspective sectional view of the reflector according to FIG. 1; FIG.

3 is a schematic side sectional view of the reflector according to a second embodiment;

Fig. 4 is a schematic side sectional view of Re ^¬ reflector pre- vents according to a third embodiment;

Figure 5 is a schematic side sectional view of Re ^¬ reflector pre- vents according to a fourth embodiment. and

Fig. 6 is a perspective oblique view of the reflector with two outer and two inner elements according to ei ^¬ nem fifth embodiment.

Preferred embodiment of the invention

Fig. 1 shows a perspective oblique view of a re reflector pre- vents according to a first embodiment, which comprises an at least in sections, conically shaped Au ^¬ ßenelement 10 with a light exit opening 12. Within the outer member 10 is also an ab ^{¬ section} conically formed inner element 14 ange- By means of which beam path 16 (see Fig. 3) egg ^¬ ner plurality of LEDs 18 by an angle α (see Fig. 3) is deflected. The LEDs 18 are held by means of a Hal ^¬ terungseinrichtung 20, which is formed in one piece with the outer member 10 in the present example. For this purpose, the mounting device 20 in turn comprises a number of mounting openings 22 corresponding to the number of LEDs 18, through which the LEDs 18 are inserted and fixed in sections. The subsequent erecting openings 22 are designed such that the beam paths 16 of the LEDs 18 are ge ^¬ towards the inner element 14, whereas the electric connection elements 24 of the LEDs 18 protrude outward from the outer member 10th Thus, the beam paths 16 are first directed to the inner element 14 and from this subsequently through the light ^exit opening 12. Alternatively, it can be provided that the mounting device 20 is designed such that the beam path 16 of one or more of the LEDs 18 held by it is directly guided by the light exit opening 12. Due to the substantially larger surface area of the outer element 10 compared to the inner element 14, substantially more LEDs 18 can be held by means of the mounting device 20 in comparison to previous solutions, as a result of which the light output of the reflector or the associated lamp is considerably increased. The resulting during operation of the LEDs 18 heat is dissipated optimally due to the large surface area at the same time.

Fig. 2 shows a perspective sectional view of the re reflector pre- vents of FIG. 1. Here, in particular from the ^¬ sectionally conical configurations of the outer member 10 and the inner member 14 and the mounting holes 22 of the support means 20 recognizable, within which the LEDs 18 are arranged and fixed. However, it should be emphasized that alternative geometric configurations of the outer element 10, the mounting device 18 and the inner element 14 can also be provided.

3 shows a schematic lateral sectional view of the reflector according to a second exemplary embodiment, wherein the outer element 10 and the mounting device 18 are not shown for reasons of clarity. The LEDs 18 are held by means of the Haltersein ^¬ direction 18 on the outer member 10 such that their respective beam paths 16 are directed ge ^¬ to the inner member 14. By means of the inner element 14 takes a deflection of the beam paths 16 by the angle α, whereby these are emitted parallel to an optical axis A of the reflector and focused by the light exit ^¬ opening 12 (s. Fig. 1). The angle α is in the present embodiment, 45 °, the opening angle ß of the conical inner member 14 is 135 °.

4 shows a schematic lateral sectional view of the reflector according to a third exemplary embodiment, the general structure being already known from the preceding description. In contrast to the second embodiment, both the angle α and the opening angle ß of the conical inner element 14 depending Weil ^¬ 90 °.

5 shows a schematic side sectional view of the reflector according to a fourth embodiment, wherein, in the inverse of the second embodiment, the angle α 135 ° and the opening angle ß of the conical In ^¬ nenelements 14 is 45 °. However, depending on the desired light emission characteristic of the reflector or the required geometric configuration, other angular ranges may also be provided.

Fig. 6 shows an oblique perspective view of the Re ^¬ reflector pre- vents, this according to a fifth execution ^¬ example two outer members 10a, 10b and two Innenele- elements 14a, includes 14b which are arranged one above another along the op ^¬ tables axis A of the reflector. Both the outer elements 10a, 10b and the inner members 14a, 14b are also in the present example portion ^¬ of conical design, wherein the frusto-conical upper inner element has a light exit opening 14a has 12 upstream light passage opening 26 through which the beam paths 16 held in the lower outer member 10b LEDs 18 can be steered by means of the lower inner element 14b. In this case, the angle sum α _a + β _a of upper outer and inner element 10 a, 14 a of the angle sum α _b + ß _{b of} the lower outer and inner member 10 _b, 14 _{b may be} chosen differently, for example, with a reflector both a narrow and limited to accomplish a surface illuminating light guide.

Claims

claims

1. reflector for a lamp, with at least one light exit opening (12) comprising an outer element

Disposed (10) and at least one inside the outer element (10) the inner element (14), by means of which a beam path (16) of at least a light emit ^¬ animal ends diode (LED 18) by an angle (α) is deflected, characterized in that the at least one outer element (10) has a mounting support means comprises (20), by means of which (10) is on the outer element Stable the at ^¬ least one LED (18).

2. A reflector according to claim 1, characterized in that the holding device (20) is designed such that the beam path (16) of the at least one LED (18) at least indirectly through the Lichtaus ^¬ outlet opening (12) is steerable.

3. A reflector according to claim 1 or 2, characterized in that the holding device (20) comprises at least one Monta ^¬ geöffnung (22), within which the at least one LED (18) for holding at least from ^¬ sectionally arranged and / or fixable.

4. Reflector according to claim 3, characterized in that the mounting device (20) comprises a plurality of mounting openings (22) for holding a plurality of LEDs (18).

5. A reflector according to any one of claims 1 to 4, characterized in that the outer element (10) and / or the inner element (14) are at least partially rotationally symmetrical out ^¬ forms.

6. A reflector according to claim 5, characterized in that the outer element (10) and / or the inner element (14) are at least partially conical.

7. A reflector according to claim 6, characterized in that the angle (α) and an opening angle (ß) of the inner ^¬ elements (14) together amount to 180 °.

8. Reflector according to one of claims 1 to 7, characterized in that a plurality of outer elements (10a, 10b) and / or inner elements (14a, 14b) is provided.

9. A reflector according to claim 8, characterized in that the plurality of outer elements (10a, 10b) and / or inner elements (14a, 14b) along an optical axis (A) of the reflector are arranged.

10. Reflector according to one of claims 1 to 9, characterized in that at least one LED (18) is provided, which is held with ^{¬ means of} the holding device (20) on the outer element (10).