Lighting device with multiple lighting functions

Abstract

A lighting device with a multiple light function, comprising an optical part (1) having a transparent segment (1a) with a primary transparent part (2) and a secondary transparent part (3), wherein both transparent parts (2, 3) are connected by a connecting channel (4), wherein both transparent parts (2, 3) each have a rear side, wherein a primary light unit (2a) is assigned to the primary transparent part (2) on its rear side and a secondary light unit (3a) is assigned to the secondary transparent part (3), and wherein the connecting channel (4) has a rear side and this rear side has an outgoing optical system (7) formed by means of prismatic elements (6), characterized in that a front side of the connecting channel (4) is opposite the outgoing optical system (7) and overlaps with a non-transparent segment (1b) which has a light absorber (8),which is adapted to convert light energy into heat energy.

Description

Field of the ArtThe invention relates to a lighting device with a multiple light function, comprising an optical part comprising a transparent segment with a primary and a secondary transparent part connected by a connection channel and a non-transparent segment, wherein a primary lighting unit is associated with the primary transparent part and a secondary lighting unit is associated with the secondary transparent part.Prior ArtIn lighting technology, especially in land vehicles, there is a need to implement a plurality of light functions in one, i.e. common, surface. Each of the light functions has its own optical system, and some components are manufactured in such a way that they are part of several light functions. From DE 10 2011 113 627 A1, EP 0 510 532 A2, FR 3 014 787 A1, US 2012 / 0 182 722 A1, US 2012 / 0 230 046 A1, a whole series of solutions is known which seek to ensure optimum light functions by means of a specific optical common part, such as cover glass, light filter, cover mask, etc. Such a common optical part is most often produced by processes of multiple injection molding into the mold, whereby individual parts of the optical part belong to different optical systems. In ensuring the required light function, only a part of the light filter is active in illumination. In order to maintain the simplest possible production process, the smallest possible number of the castings is used in the process of repeated injection molding. Thus, if the filter comprises two parts having identical colour, the manufacturing process is proposed such that both parts are manufactured by a single sprue, which means that both parts of the filter are connected by a connecting channel which is not part of the optical functions. The disadvantage of such light filters is the fact that, during operation, unwanted scattered light is often scattered into the other part of the filter from one part of the filter through the connecting channel.The object of the invention is to eliminate or at least minimize the disadvantages of the prior art, in particular to enable the independence of individual light surfaces of the optical part which is intended for a plurality of light functions, wherein a simple production process, in particular a minimum number of the inlets, has to be maintained during the process of repeated injection molding.DISCLOSURE OF THE ESSENCE OF THE INVENTIONThe object of the invention is achieved by an illumination device according to the invention, the essence of which consists in forming an outgoing optical system in the connecting channel with the aid of a plurality of prismatic elements, with respect to which outgoing optical system a light absorber is formed in the part of the non-transparent segment covering the connecting channel, which light absorber is adapted for converting the light energy to the thermal energy. This prevents the transmission between the primary and secondary transparent portions, because a portion of the light entering the communication channel is continuously guided out in the perpendicular-forward direction by the surfaces of prism elements satisfying the total reflection conditions and absorbed on the absorber.Further features and advantages are evident from the dependent claims.Explanation of the DrawingsThe particular invention is illustrated schematically in the drawing, in which FIG. 1 is an end view of the illumination device, FIG. 2 is a front view of the transparent segment, FIG. 3 shows a side view of the transparent segment from FIG. 2, FIG. 4 is an end view of the non-transparent segment, FIG. 5 is a section A-A' through the lighting device according to FIG. 1 with the light absorber, and FIG. 6 is a section A-A' through the lighting device with a non-transparent segment of material with a dark color.Embodiments of the InventionThe illumination device illustrated in FIG. 1 has an optical part 1, which is produced as a compact casting by processes of repeated injection molding, wherein it has two segments 1 a, 1 bdifferent in terms of material.In Figs. 2 and 3 a transparent segment 1a of the optical part 1 is shown, which comprises a primary transparent part 2 and a secondary transparent part 3 which are connected to each other by means of a connection channel 4, which is also transparent. The entire transparent segment 1a is produced by injection molding using the first pouring opening 5a. The connecting channel 4 comprises a lead-out optics 7 which, on the rear side of the connecting channel 4, comprise a plurality of prismatic elements 6 which are adapted to prevent the passage of light rays 10 which are reflected at the adjoining edges of the primary transparent part 2 or the secondary transparent part 3 from the end face of the respective one transparent part 2, 3 through the connecting channel 4 into the second transparent part 2, 3. A part of the light thus coming from the respective transparent part 2, 3 into the communication channel 4 is continuously led out in the direction perpendicular to the front by means of said surfaces of prismatic elements 6 satisfying the conditions of total reflection, and after being led out is absorbed on the absorber 8 shown in Fig. 4.The non-transparent segment 1b of the optical part 1 shown in FIG. 4 is produced by means of the other injection opening 5b. In the assembled state of the lighting device, the connecting channel 4 of the transparent segment 1a extends behind the central part of the non-transparent segment 1b in the front view, as shown by broken lines in FIG. 1, wherein a light absorber 8 for converting the light energy into thermal energy is formed at least on a part of the non-transparent segment 1b which is situated opposite the connecting channel 4. The absorber 8 is, for example, a component of the inner structure of the non-transparent segment 1 band is produced by the same injection molding process as the other parts of the non-transparent segment 1 bof the optical part 1, wherein light absorption does not occur in the parts of the non-transparent segment 1 bout of the absorber 8.As can be seen from FIG. 5, a primary light unit 2a for emitting light beams 10 of the first light function is situated in the illumination device opposite the primary transparent part 2. Opposite the secondary transparent part 3, a secondary light unit 3a for emitting light beams 10 of the second light function is situated in the illumination device. A part of the light beams 10 of the first and / or second light function is guided into the inner structure of the transparent segment 1 a. The light beams 10 which penetrate into the connecting channel 4 are reflected by their prismatic elements 6 by means of the exit optics 7 and the exit surfaces onto the absorber 8, in which these are absorbed.In the embodiment shown in FIG. 6, the entire non-transparent segment 1 bis made of a dark color material capable of converting the light energy into heat energy, and as an absorber 8, a part of the non-transparent segment 1 bcovering the communication channel 4 serves.

Claims

Illumination device with a multiple light function, comprising an optical part (1) comprising a transparent segment (1a) with a primary transparent part (2) and with a secondary transparent part (3), wherein both transparent parts (2, 3) are connected by a connecting channel (4), wherein both transparent parts (2, 3) each have a rear side, wherein a primary light unit (2a) is assigned to the primary transparent part (2) on its rear side and a secondary light unit (3a) is assigned to the secondary transparent part (3) on its rear side, and wherein the connecting channel (4) has a rear side and this rear side has a lead-out optical unit (7) formed with the aid of prismatic elements (6), characterized in that a front side of the connecting channel (4) is opposite the lead-out optical unit (7) and overlaps with a non-transparent segment (1b), which has a light absorber (8) which is adapted to convert the light energy into heat energy.Lighting device according to claim 1, characterised in that the light absorber (8) is formed by a part of the non-transparent segment (1b) with dark colour.Lighting device according to claim 2, characterized in that the non-transparent segment (1b) is formed from a dark colour material adapted for converting the light energy into thermal energy.Lighting device according to claim 1, characterized in that the absorber (8) is formed on the rear / inner side of the non-transparent segment (1b).Lighting device according to one of the preceding claims, characterized in that the optical part (1) is formed by a compact casting which has two segments (1a, 1b) which are injection-moulded several times and differ in material.

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