LIGHT MODULE WITH AT LEAST ONE LIGHT SOURCE AND A REFLECTOR

Abstract

The invention relates to a light module with at least one light source (4) and a reflector (2), which is arranged so as to reflect the light radiation emitted by the light source (4), a colored anodized layer (22) being formed on at least regions of the upper side (21), which is formed so as to reflect the light radiation, of the reflector (2), which anodized layer is in the form of a spectral filter for the light radiation impinging from the light source (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

An exemplary embodiment of the invention will be explained in more detail below with reference to schematic drawings, in which:

FIG. 1 shows a perspective illustration of a light module according to the invention; and

FIG. 2 shows a side view of the illustration in FIG. 1.

PREFERRED EMBODIMENT OF THE INVENTION

Identical or functionally identical elements are provided with the same reference symbols in the figures.

Light modules having a reflector and a light source arranged centrally in the reflector are known. In these light modules, a reflector consisting of a colorlessly anodized, naturally colored aluminum sheet is used. The halogen incandescent lamp used as the burner is covered towards the light exit by means of a dome, with the result that the radiation emitted by the burner can only leave the light module once it has been reflected at least once on the reflector. Such an embodiment is known from the light module HALOSPOT®.

FIG. 1 shows a perspective illustration of a light module 1 according to the invention, which has a reflector 2, which is designed to be rotationally symmetrical and has a funnel-like structure. The reflector 2 is circumferentially surrounded by an edge 3. Arranged centrally in the reflector 2 is a light source 4, which, in the exemplary embodiment, is in the form of a low-volt halogen lamp. This light source 4 is covered on its front side and therefore on the side remote from the use region, in which the light source 4 is used in the reflector 3, by a cap 5. The cap 5 is formed with an arcuate grip web 6 as one piece, which grip web 6 extends over the diameter of the reflector 3 and opens out at an upper side 21 of the reflector 2.

A colored anodized layer 22, which is in the form of a spectral filter for the light signals produced by the light source 4 and impinging on the anodized layer 22, is formed on this upper side 21.

In order to produce colored light by means of the light module 1, the reflector 3 is in the form of a color-anodized aluminum sheet with a spectral selectivity. The colored anodized layer 22 can in this case be colored specifically. Preferably, the anodized layer 22 is colored by at least one dye for producing the hues violet, blue, green, yellow, orange and red or any desired mixture thereof. In each case an intensively colored and a pastel-colored variant are particularly advantageous for proportioning the color effect.

Furthermore, the aluminum sheet, in particular the upper side 21, is advantageously formed with a lustrous surface finish. Provision of this lustrous finish for the aluminum sheet is preferably carried out before the application of the colored anodized layer 22.

The spectral selectivity can be achieved in a cost-effective manner by absorption of the undesired parts of the spectrum. The question of the thermal loading capacity of the reflector 2 acting as the spectral filter with the colored anodized layer 22 and the question of heat dissipation are essential for the maximum convertible light quantity. The reflector 3 can preferably have a diameter of approximately 111 mm and preferably consists of a highly thermally conductive material. Owing to the open construction (no covering disk or diffuser is positioned on the front on the reflector 3), the front side of the light module 1 and in particular the front side of the reflector 3 can also dissipate the heat directly to the surrounding environment. Preferably, provision may also be made for the rear side of the reflector 2 and therefore the side which is remote from the upper side 21 not be covered, with the result that this side can also dissipate the heat very effectively to the surrounding environment. Tests have shown that, even when using burners with a rated power of approximately 100 W over an operating time of approximately 3000 hours, no problems occur even with an anodized layer which is colored black. Since black layers substantially absorb the entire visible spectrum, at least identical results can therefore be achieved with anodized layers 22 which are colored differently since they absorb a much smaller part of the spectrum than such black layers.

In comparison with colored light-emitting diodes with their virtually monochromatic spectrum, the proposed design of the light module 1 with a halogen lamp can allow for a broader-band emission and primarily can allow the possibility for much higher intensities to be produced. Above all, the variants with a pastel-colored reflector 3 can therefore also make a contribution to general lighting to a certain extent. For example, a daylight effect can be produced with a reflector which is colored light blue and therefore an anodized layer 22 which is colored light blue.

FIG. 2 shows a schematic side view of the light module 1. The bell-shaped reflector 2 with its colored anodized layer 22, which is applied over the entire area of the upper side 21, is illustrated. Furthermore, electrical contacts 7a and 7b are shown which are connected to the electrical mains supply for operation of the light module via an electrical transformer or an electronic converter.

Claims

1. A light module with at least one light source (4) and a reflector (2), which is arranged so as to reflect the light radiation emitted by the light source (4), characterized in that a colored anodized layer (22) is formed on at least regions of the upper side (21), which is formed so as to reflect the light radiation, of the reflector (2), which anodized layer is in the form of a spectral filter for the light radiation impinging from the light source (4).

2. The light module as claimed in claim 1, characterized in that the reflector (2) has a color-anodized aluminum sheet.

3. The light module as claimed in claim 1, characterized in that the anodized layer (22) is colored by at least one dye.

4. The light module as claimed in claim 1, characterized in that at least two subregions of the upper side (21) with a differently colored anodized layer (22) are formed.

5. The light module as claimed in claim 1, characterized in that the anodized layer (22) is colored by at least one of the hues violet, blue, green, yellow, orange or red or a mixture thereof.

6. The light module as claimed in claim 1, characterized in that the light source (4) is covered by a cap (5) in such a way that the direct radiation emission from the light source in the main emission direction parallel to the axis of symmetry of the reflector (2) is suppressed and, instead, radiation emitted in this direction can leave the light module (1) only once it has been reflected at least once on the reflector (2).

7. The light module as claimed in claim 1, characterized in that a grip web (6) extends over the clear width of the reflector (2), in particular spans the reflector (2) in the form of an arc.

8. The light module as claimed in claim 1, characterized in that at least regions of the upper side (21) are designed to be lustrous.

9. The light module as claimed in claim 1, characterized in that the light source (4) is in the form of a halogen lamp, in particular in the form of a low-volt halogen incandescent lamp or in the form of an IRC halogen lamp or in the form of an HCI lamp.

10. The light module as claimed in claim 1, characterized in that the reflector (2) is open on its front side.